Index: uspace/lib/block/libblock.c
===================================================================
--- uspace/lib/block/libblock.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/block/libblock.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -2,4 +2,5 @@
  * Copyright (c) 2008 Jakub Jermar
  * Copyright (c) 2008 Martin Decky
+ * Copyright (c) 2011 Martin Sucha
  * All rights reserved.
  *
@@ -61,13 +62,13 @@
 static LIST_INITIALIZE(dcl_head);
 
-#define CACHE_BUCKETS_LOG2		10
-#define CACHE_BUCKETS			(1 << CACHE_BUCKETS_LOG2)
+#define CACHE_BUCKETS_LOG2  10
+#define CACHE_BUCKETS       (1 << CACHE_BUCKETS_LOG2)
 
 typedef struct {
 	fibril_mutex_t lock;
-	size_t lblock_size;		/**< Logical block size. */
-	unsigned blocks_cluster;	/**< Physical blocks per block_t */
-	unsigned block_count;		/**< Total number of blocks. */
-	unsigned blocks_cached;		/**< Number of cached blocks. */
+	size_t lblock_size;       /**< Logical block size. */
+	unsigned blocks_cluster;  /**< Physical blocks per block_t */
+	unsigned block_count;     /**< Total number of blocks. */
+	unsigned blocks_cached;   /**< Number of cached blocks. */
 	hash_table_t block_hash;
 	link_t free_head;
@@ -78,5 +79,5 @@
 	link_t link;
 	devmap_handle_t devmap_handle;
-	int dev_phone;
+	async_sess_t *sess;
 	fibril_mutex_t comm_area_lock;
 	void *comm_area;
@@ -84,19 +85,20 @@
 	void *bb_buf;
 	aoff64_t bb_addr;
-	size_t pblock_size;		/**< Physical block size. */
+	size_t pblock_size;  /**< Physical block size. */
 	cache_t *cache;
 } devcon_t;
 
-static int read_blocks(devcon_t *devcon, aoff64_t ba, size_t cnt);
-static int write_blocks(devcon_t *devcon, aoff64_t ba, size_t cnt);
-static int get_block_size(int dev_phone, size_t *bsize);
-static int get_num_blocks(int dev_phone, aoff64_t *nblocks);
-static aoff64_t ba_ltop(devcon_t *devcon, aoff64_t lba);
+static int read_blocks(devcon_t *, aoff64_t, size_t);
+static int write_blocks(devcon_t *, aoff64_t, size_t);
+static int get_block_size(async_sess_t *, size_t *);
+static int get_num_blocks(async_sess_t *, aoff64_t *);
+static aoff64_t ba_ltop(devcon_t *, aoff64_t);
 
 static devcon_t *devcon_search(devmap_handle_t devmap_handle)
 {
 	link_t *cur;
-
+	
 	fibril_mutex_lock(&dcl_lock);
+	
 	for (cur = dcl_head.next; cur != &dcl_head; cur = cur->next) {
 		devcon_t *devcon = list_get_instance(cur, devcon_t, link);
@@ -106,17 +108,18 @@
 		}
 	}
+	
 	fibril_mutex_unlock(&dcl_lock);
 	return NULL;
 }
 
-static int devcon_add(devmap_handle_t devmap_handle, int dev_phone, size_t bsize,
-    void *comm_area, size_t comm_size)
+static int devcon_add(devmap_handle_t devmap_handle, async_sess_t *sess,
+    size_t bsize, void *comm_area, size_t comm_size)
 {
 	link_t *cur;
 	devcon_t *devcon;
-
+	
 	if (comm_size < bsize)
 		return EINVAL;
-
+	
 	devcon = malloc(sizeof(devcon_t));
 	if (!devcon)
@@ -125,5 +128,5 @@
 	link_initialize(&devcon->link);
 	devcon->devmap_handle = devmap_handle;
-	devcon->dev_phone = dev_phone;
+	devcon->sess = sess;
 	fibril_mutex_initialize(&devcon->comm_area_lock);
 	devcon->comm_area = comm_area;
@@ -133,5 +136,5 @@
 	devcon->pblock_size = bsize;
 	devcon->cache = NULL;
-
+	
 	fibril_mutex_lock(&dcl_lock);
 	for (cur = dcl_head.next; cur != &dcl_head; cur = cur->next) {
@@ -155,44 +158,46 @@
 }
 
-int block_init(devmap_handle_t devmap_handle, size_t comm_size)
-{
-	int rc;
-	int dev_phone;
-	void *comm_area;
-	size_t bsize;
-
-	comm_area = mmap(NULL, comm_size, PROTO_READ | PROTO_WRITE,
+int block_init(exch_mgmt_t mgmt, devmap_handle_t devmap_handle,
+    size_t comm_size)
+{
+	void *comm_area = mmap(NULL, comm_size, PROTO_READ | PROTO_WRITE,
 	    MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
-	if (!comm_area) {
+	if (!comm_area)
 		return ENOMEM;
-	}
-
-	dev_phone = devmap_device_connect(devmap_handle, IPC_FLAG_BLOCKING);
-	if (dev_phone < 0) {
+	
+	async_sess_t *sess = devmap_device_connect(mgmt, devmap_handle,
+	    IPC_FLAG_BLOCKING);
+	if (!sess) {
 		munmap(comm_area, comm_size);
-		return dev_phone;
-	}
-
-	rc = async_share_out_start(dev_phone, comm_area,
+		return ENOENT;
+	}
+	
+	async_exch_t *exch = async_exchange_begin(sess);
+	int rc = async_share_out_start(exch, comm_area,
 	    AS_AREA_READ | AS_AREA_WRITE);
-	if (rc != EOK) {
-	    	munmap(comm_area, comm_size);
-		async_hangup(dev_phone);
-		return rc;
-	}
-
-	if (get_block_size(dev_phone, &bsize) != EOK) {
-		munmap(comm_area, comm_size);
-		async_hangup(dev_phone);
-		return rc;
-	}
-	
-	rc = devcon_add(devmap_handle, dev_phone, bsize, comm_area, comm_size);
+	async_exchange_end(exch);
+	
 	if (rc != EOK) {
 		munmap(comm_area, comm_size);
-		async_hangup(dev_phone);
+		async_hangup(sess);
 		return rc;
 	}
-
+	
+	size_t bsize;
+	rc = get_block_size(sess, &bsize);
+	
+	if (rc != EOK) {
+		munmap(comm_area, comm_size);
+		async_hangup(sess);
+		return rc;
+	}
+	
+	rc = devcon_add(devmap_handle, sess, bsize, comm_area, comm_size);
+	if (rc != EOK) {
+		munmap(comm_area, comm_size);
+		async_hangup(sess);
+		return rc;
+	}
+	
 	return EOK;
 }
@@ -205,14 +210,14 @@
 	if (devcon->cache)
 		(void) block_cache_fini(devmap_handle);
-
+	
 	devcon_remove(devcon);
-
+	
 	if (devcon->bb_buf)
 		free(devcon->bb_buf);
-
+	
 	munmap(devcon->comm_area, devcon->comm_size);
-	async_hangup(devcon->dev_phone);
-
-	free(devcon);	
+	async_hangup(devcon->sess);
+	
+	free(devcon);
 }
 
@@ -807,5 +812,5 @@
 	assert(devcon);
 	
-	return get_block_size(devcon->dev_phone, bsize);
+	return get_block_size(devcon->sess, bsize);
 }
 
@@ -819,10 +824,60 @@
 int block_get_nblocks(devmap_handle_t devmap_handle, aoff64_t *nblocks)
 {
-	devcon_t *devcon;
-
-	devcon = devcon_search(devmap_handle);
-	assert(devcon);
-	
-	return get_num_blocks(devcon->dev_phone, nblocks);
+	devcon_t *devcon = devcon_search(devmap_handle);
+	assert(devcon);
+	
+	return get_num_blocks(devcon->sess, nblocks);
+}
+
+/** Read bytes directly from the device (bypass cache)
+ * 
+ * @param devmap_handle	Device handle of the block device.
+ * @param abs_offset	Absolute offset in bytes where to start reading
+ * @param bytes			Number of bytes to read
+ * @param data			Buffer that receives the data
+ * 
+ * @return		EOK on success or negative error code on failure.
+ */
+int block_read_bytes_direct(devmap_handle_t devmap_handle, aoff64_t abs_offset,
+    size_t bytes, void *data)
+{
+	int rc;
+	size_t phys_block_size;
+	size_t buf_size;
+	void *buffer;
+	aoff64_t first_block;
+	aoff64_t last_block;
+	size_t blocks;
+	size_t offset;
+	
+	rc = block_get_bsize(devmap_handle, &phys_block_size);
+	if (rc != EOK) {
+		return rc;
+	}
+	
+	/* calculate data position and required space */
+	first_block = abs_offset / phys_block_size;
+	offset = abs_offset % phys_block_size;
+	last_block = (abs_offset + bytes - 1) / phys_block_size;
+	blocks = last_block - first_block + 1;
+	buf_size = blocks * phys_block_size;
+	
+	/* read the data into memory */
+	buffer = malloc(buf_size);
+	if (buffer == NULL) {
+		return ENOMEM;
+	}
+	
+	rc = block_read_direct(devmap_handle, first_block, blocks, buffer);
+	if (rc != EOK) {
+		free(buffer);
+		return rc;
+	}
+	
+	/* copy the data from the buffer */
+	memcpy(data, buffer + offset, bytes);
+	free(buffer);
+	
+	return EOK;
 }
 
@@ -838,9 +893,11 @@
 static int read_blocks(devcon_t *devcon, aoff64_t ba, size_t cnt)
 {
-	int rc;
-
-	assert(devcon);
-	rc = async_req_3_0(devcon->dev_phone, BD_READ_BLOCKS, LOWER32(ba),
+	assert(devcon);
+	
+	async_exch_t *exch = async_exchange_begin(devcon->sess);
+	int rc = async_req_3_0(exch, BD_READ_BLOCKS, LOWER32(ba),
 	    UPPER32(ba), cnt);
+	async_exchange_end(exch);
+	
 	if (rc != EOK) {
 		printf("Error %d reading %zu blocks starting at block %" PRIuOFF64
@@ -851,4 +908,5 @@
 #endif
 	}
+	
 	return rc;
 }
@@ -865,9 +923,11 @@
 static int write_blocks(devcon_t *devcon, aoff64_t ba, size_t cnt)
 {
-	int rc;
-
-	assert(devcon);
-	rc = async_req_3_0(devcon->dev_phone, BD_WRITE_BLOCKS, LOWER32(ba),
+	assert(devcon);
+	
+	async_exch_t *exch = async_exchange_begin(devcon->sess);
+	int rc = async_req_3_0(exch, BD_WRITE_BLOCKS, LOWER32(ba),
 	    UPPER32(ba), cnt);
+	async_exchange_end(exch);
+	
 	if (rc != EOK) {
 		printf("Error %d writing %zu blocks starting at block %" PRIuOFF64
@@ -877,31 +937,36 @@
 #endif
 	}
+	
 	return rc;
 }
 
 /** Get block size used by the device. */
-static int get_block_size(int dev_phone, size_t *bsize)
+static int get_block_size(async_sess_t *sess, size_t *bsize)
 {
 	sysarg_t bs;
-	int rc;
-
-	rc = async_req_0_1(dev_phone, BD_GET_BLOCK_SIZE, &bs);
+	
+	async_exch_t *exch = async_exchange_begin(sess);
+	int rc = async_req_0_1(exch, BD_GET_BLOCK_SIZE, &bs);
+	async_exchange_end(exch);
+	
 	if (rc == EOK)
 		*bsize = (size_t) bs;
-
+	
 	return rc;
 }
 
 /** Get total number of blocks on block device. */
-static int get_num_blocks(int dev_phone, aoff64_t *nblocks)
-{
-	sysarg_t nb_l, nb_h;
-	int rc;
-
-	rc = async_req_0_2(dev_phone, BD_GET_NUM_BLOCKS, &nb_l, &nb_h);
-	if (rc == EOK) {
+static int get_num_blocks(async_sess_t *sess, aoff64_t *nblocks)
+{
+	sysarg_t nb_l;
+	sysarg_t nb_h;
+	
+	async_exch_t *exch = async_exchange_begin(sess);
+	int rc = async_req_0_2(exch, BD_GET_NUM_BLOCKS, &nb_l, &nb_h);
+	async_exchange_end(exch);
+	
+	if (rc == EOK)
 		*nblocks = (aoff64_t) MERGE_LOUP32(nb_l, nb_h);
-	}
-
+	
 	return rc;
 }
Index: uspace/lib/block/libblock.h
===================================================================
--- uspace/lib/block/libblock.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/block/libblock.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -2,4 +2,5 @@
  * Copyright (c) 2008 Jakub Jermar
  * Copyright (c) 2008 Martin Decky 
+ * Copyright (c) 2011 Martin Sucha 
  * All rights reserved.
  *
@@ -39,4 +40,5 @@
 
 #include <stdint.h>
+#include <async.h>
 #include "../../srv/vfs/vfs.h"
 #include <fibril_synch.h>
@@ -95,5 +97,5 @@
 };
 
-extern int block_init(devmap_handle_t, size_t);
+extern int block_init(exch_mgmt_t, devmap_handle_t, size_t);
 extern void block_fini(devmap_handle_t);
 
@@ -113,4 +115,5 @@
 extern int block_get_nblocks(devmap_handle_t, aoff64_t *);
 extern int block_read_direct(devmap_handle_t, aoff64_t, size_t, void *);
+extern int block_read_bytes_direct(devmap_handle_t, aoff64_t, size_t, void *);
 extern int block_write_direct(devmap_handle_t, aoff64_t, size_t, const void *);
 
Index: uspace/lib/c/Makefile
===================================================================
--- uspace/lib/c/Makefile	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/Makefile	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -68,5 +68,7 @@
 	generic/clipboard.c \
 	generic/devmap.c \
+	generic/devmap_obsolete.c \
 	generic/devman.c \
+	generic/devman_obsolete.c \
 	generic/device/hw_res.c \
 	generic/device/char_dev.c \
@@ -76,4 +78,5 @@
 	generic/str.c \
 	generic/str_error.c \
+	generic/l18n/langs.c \
 	generic/fibril.c \
 	generic/fibril_synch.c \
@@ -95,10 +98,11 @@
 	generic/io/console.c \
 	generic/io/screenbuffer.c \
-	generic/ipc/ns.c \
 	generic/malloc.c \
 	generic/sysinfo.c \
 	generic/ipc.c \
+	generic/ns.c \
+	generic/ns_obsolete.c \
 	generic/async.c \
-	generic/async_sess.c \
+	generic/async_obsolete.c \
 	generic/loader.c \
 	generic/getopt.c \
@@ -128,5 +132,5 @@
 	generic/assert.c
 
-ifeq ($(CONFIG_RTLD), y)
+ifeq ($(CONFIG_RTLD),y)
 	GENERIC_SOURCES += \
 		generic/dlfcn.c \
Index: uspace/lib/c/arch/abs32le/include/ddi.h
===================================================================
--- uspace/lib/c/arch/abs32le/include/ddi.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/arch/abs32le/include/ddi.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -33,4 +33,7 @@
 #define LIBC_abs32le_DDI_H_
 
+#include <sys/types.h>
+#include <libarch/types.h>
+
 static inline void pio_write_8(ioport8_t *port, uint8_t v)
 {
Index: uspace/lib/c/arch/abs32le/include/types.h
===================================================================
--- uspace/lib/c/arch/abs32le/include/types.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/arch/abs32le/include/types.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -51,4 +51,5 @@
 typedef uint32_t size_t;
 
+typedef int32_t intptr_t;
 typedef uint32_t uintptr_t;
 typedef uint32_t atomic_count_t;
Index: uspace/lib/c/arch/amd64/include/types.h
===================================================================
--- uspace/lib/c/arch/amd64/include/types.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/arch/amd64/include/types.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -51,4 +51,5 @@
 typedef uint64_t size_t;
 
+typedef int64_t intptr_t;
 typedef uint64_t uintptr_t;
 typedef uint64_t atomic_count_t;
Index: uspace/lib/c/arch/arm32/include/types.h
===================================================================
--- uspace/lib/c/arch/arm32/include/types.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/arch/arm32/include/types.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -52,4 +52,5 @@
 typedef uint32_t size_t;
 
+typedef int32_t intptr_t;
 typedef uint32_t uintptr_t;
 typedef uint32_t atomic_count_t;
Index: uspace/lib/c/arch/ia32/include/types.h
===================================================================
--- uspace/lib/c/arch/ia32/include/types.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/arch/ia32/include/types.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -51,4 +51,5 @@
 typedef uint32_t size_t;
 
+typedef int32_t intptr_t;
 typedef uint32_t uintptr_t;
 typedef uint32_t atomic_count_t;
Index: uspace/lib/c/arch/ia64/include/types.h
===================================================================
--- uspace/lib/c/arch/ia64/include/types.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/arch/ia64/include/types.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -61,4 +61,5 @@
 typedef uint64_t size_t;
 
+typedef int64_t intptr_t;
 typedef uint64_t uintptr_t;
 typedef uint64_t atomic_count_t;
Index: uspace/lib/c/arch/mips32/include/types.h
===================================================================
--- uspace/lib/c/arch/mips32/include/types.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/arch/mips32/include/types.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -52,4 +52,5 @@
 typedef uint32_t size_t;
 
+typedef int32_t intptr_t;
 typedef uint32_t uintptr_t;
 typedef uint32_t atomic_count_t;
Index: uspace/lib/c/arch/ppc32/include/types.h
===================================================================
--- uspace/lib/c/arch/ppc32/include/types.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/arch/ppc32/include/types.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -51,4 +51,5 @@
 typedef uint32_t size_t;
 
+typedef int32_t intptr_t;
 typedef uint32_t uintptr_t;
 typedef uint32_t atomic_count_t;
Index: uspace/lib/c/arch/sparc64/include/types.h
===================================================================
--- uspace/lib/c/arch/sparc64/include/types.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/arch/sparc64/include/types.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -51,4 +51,5 @@
 typedef uint64_t size_t;
 
+typedef int64_t intptr_t;
 typedef uint64_t uintptr_t;
 typedef uint64_t atomic_count_t;
Index: uspace/lib/c/generic/adt/hash_table.c
===================================================================
--- uspace/lib/c/generic/adt/hash_table.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/adt/hash_table.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -54,5 +54,5 @@
  *
  */
-int hash_table_create(hash_table_t *h, hash_count_t m, hash_count_t max_keys,
+bool hash_table_create(hash_table_t *h, hash_count_t m, hash_count_t max_keys,
     hash_table_operations_t *op)
 {
Index: uspace/lib/c/generic/adt/measured_strings.c
===================================================================
--- uspace/lib/c/generic/adt/measured_strings.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/adt/measured_strings.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -42,4 +42,5 @@
 #include <errno.h>
 #include <async.h>
+#include <async_obsolete.h>
 
 /** Creates a new measured string bundled with a copy of the given string
@@ -326,5 +327,5 @@
 		return ENOMEM;
 
-	rc = async_data_read_start(phone, lengths,
+	rc = async_obsolete_data_read_start(phone, lengths,
 	    sizeof(size_t) * (count + 1));
 	if (rc != EOK) {
@@ -351,5 +352,5 @@
 		(*strings)[index].length = lengths[index];
 		if (lengths[index] > 0) {
-			rc = async_data_read_start(phone, next, lengths[index]);
+			rc = async_obsolete_data_read_start(phone, next, lengths[index]);
 			if (rc != EOK) {
 			    	free(lengths);
@@ -399,5 +400,5 @@
 		return ENOMEM;
 
-	rc = async_data_write_start(phone, lengths,
+	rc = async_obsolete_data_write_start(phone, lengths,
 	    sizeof(size_t) * (count + 1));
 	if (rc != EOK) {
@@ -410,5 +411,5 @@
 	for (index = 0; index < count; index++) {
 		if (strings[index].length > 0) {
-			rc = async_data_write_start(phone, strings[index].value,
+			rc = async_obsolete_data_write_start(phone, strings[index].value,
 			    strings[index].length);
 			if (rc != EOK)
Index: uspace/lib/c/generic/as.c
===================================================================
--- uspace/lib/c/generic/as.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/as.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -35,4 +35,5 @@
 #include <as.h>
 #include <libc.h>
+#include <errno.h>
 #include <unistd.h>
 #include <align.h>
@@ -114,4 +115,30 @@
 }
 
+/** Find mapping to physical address.
+ *
+ * @param address Virtual address in question (virtual).
+ * @param[out] frame Frame address (physical).
+ * @return Error code.
+ * @retval EOK No error, @p frame holds the translation.
+ * @retval ENOENT Mapping not found.
+ */
+int as_get_physical_mapping(void *address, uintptr_t *frame)
+{
+	uintptr_t tmp_frame;
+	uintptr_t virt = (uintptr_t) address;
+	
+	int rc = (int) __SYSCALL2(SYS_PAGE_FIND_MAPPING,
+	    (sysarg_t) virt, (sysarg_t) &tmp_frame);
+	if (rc != EOK) {
+		return rc;
+	}
+	
+	if (frame != NULL) {
+		*frame = tmp_frame;
+	}
+	
+	return EOK;
+}
+
 /** @}
  */
Index: uspace/lib/c/generic/async.c
===================================================================
--- uspace/lib/c/generic/async.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/async.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -40,6 +40,7 @@
  * programming.
  *
- * You should be able to write very simple multithreaded programs, the async
- * framework will automatically take care of most synchronization problems.
+ * You should be able to write very simple multithreaded programs. The async
+ * framework will automatically take care of most of the synchronization
+ * problems.
  *
  * Example of use (pseudo C):
@@ -53,7 +54,14 @@
  *   int fibril1(void *arg)
  *   {
- *     conn = async_connect_me_to();
- *     c1 = async_send(conn);
- *     c2 = async_send(conn);
+ *     conn = async_connect_me_to(...);
+ *
+ *     exch = async_exchange_begin(conn);
+ *     c1 = async_send(exch);
+ *     async_exchange_end(exch);
+ *
+ *     exch = async_exchange_begin(conn);
+ *     c2 = async_send(exch);
+ *     async_exchange_end(exch);
+ *
  *     async_wait_for(c1);
  *     async_wait_for(c2);
@@ -94,5 +102,4 @@
 #include <futex.h>
 #include <fibril.h>
-#include <stdio.h>
 #include <adt/hash_table.h>
 #include <adt/list.h>
@@ -102,8 +109,13 @@
 #include <arch/barrier.h>
 #include <bool.h>
+#include <malloc.h>
+#include <mem.h>
 #include <stdlib.h>
-#include <malloc.h>
 #include "private/async.h"
 
+#define CLIENT_HASH_TABLE_BUCKETS  32
+#define CONN_HASH_TABLE_BUCKETS    32
+
+/** Async framework global futex */
 atomic_t async_futex = FUTEX_INITIALIZER;
 
@@ -111,33 +123,25 @@
 atomic_t threads_in_ipc_wait = { 0 };
 
-typedef struct {
-	awaiter_t wdata;
-	
-	/** If reply was received. */
-	bool done;
-	
-	/** Pointer to where the answer data is stored. */
-	ipc_call_t *dataptr;
-	
-	sysarg_t retval;
-} amsg_t;
-
-/**
- * Structures of this type are used to group information about
- * a call and about a message queue link.
- */
+/** Naming service session */
+async_sess_t *session_ns;
+
+/** Call data */
 typedef struct {
 	link_t link;
+	
 	ipc_callid_t callid;
 	ipc_call_t call;
 } msg_t;
 
+/* Client connection data */
 typedef struct {
+	link_t link;
+	
 	sysarg_t in_task_hash;
-	link_t link;
-	int refcnt;
+	atomic_t refcnt;
 	void *data;
 } client_t;
 
+/* Server connection data */
 typedef struct {
 	awaiter_t wdata;
@@ -148,4 +152,5 @@
 	/** Incoming client task hash. */
 	sysarg_t in_task_hash;
+	
 	/** Incoming phone hash. */
 	sysarg_t in_phone_hash;
@@ -170,5 +175,5 @@
 
 /** Identifier of the incoming connection handled by the current fibril. */
-static fibril_local connection_t *FIBRIL_connection;
+static fibril_local connection_t *fibril_connection;
 
 static void *default_client_data_constructor(void)
@@ -196,8 +201,8 @@
 }
 
-void *async_client_data_get(void)
-{
-	assert(FIBRIL_connection);
-	return FIBRIL_connection->client->data;
+void *async_get_client_data(void)
+{
+	assert(fibril_connection);
+	return fibril_connection->client->data;
 }
 
@@ -215,9 +220,4 @@
 }
 
-/**
- * Pointer to a fibril function that will be used to handle connections.
- */
-static async_client_conn_t client_connection = default_client_connection;
-
 /** Default fibril function that gets called to handle interrupt notifications.
  *
@@ -232,9 +232,41 @@
 }
 
-/**
- * Pointer to a fibril function that will be used to handle interrupt
- * notifications.
- */
+static async_client_conn_t client_connection = default_client_connection;
 static async_client_conn_t interrupt_received = default_interrupt_received;
+
+/** Setter for client_connection function pointer.
+ *
+ * @param conn Function that will implement a new connection fibril.
+ *
+ */
+void async_set_client_connection(async_client_conn_t conn)
+{
+	client_connection = conn;
+}
+
+/** Setter for interrupt_received function pointer.
+ *
+ * @param intr Function that will implement a new interrupt
+ *             notification fibril.
+ */
+void async_set_interrupt_received(async_client_conn_t intr)
+{
+	interrupt_received = intr;
+}
+
+/** Mutex protecting inactive_exch_list and avail_phone_cv.
+ *
+ */
+static FIBRIL_MUTEX_INITIALIZE(async_sess_mutex);
+
+/** List of all currently inactive exchanges.
+ *
+ */
+static LIST_INITIALIZE(inactive_exch_list);
+
+/** Condition variable to wait for a phone to become available.
+ *
+ */
+static FIBRIL_CONDVAR_INITIALIZE(avail_phone_cv);
 
 static hash_table_t client_hash_table;
@@ -242,10 +274,8 @@
 static LIST_INITIALIZE(timeout_list);
 
-#define CLIENT_HASH_TABLE_BUCKETS  32
-#define CONN_HASH_TABLE_BUCKETS    32
-
 static hash_index_t client_hash(unsigned long key[])
 {
 	assert(key);
+	
 	return (((key[0]) >> 4) % CLIENT_HASH_TABLE_BUCKETS);
 }
@@ -253,4 +283,7 @@
 static int client_compare(unsigned long key[], hash_count_t keys, link_t *item)
 {
+	assert(key);
+	assert(item);
+	
 	client_t *client = hash_table_get_instance(item, client_t, link);
 	return (key[0] == client->in_task_hash);
@@ -278,4 +311,5 @@
 {
 	assert(key);
+	
 	return (((key[0]) >> 4) % CONN_HASH_TABLE_BUCKETS);
 }
@@ -292,4 +326,7 @@
 static int conn_compare(unsigned long key[], hash_count_t keys, link_t *item)
 {
+	assert(key);
+	assert(item);
+	
 	connection_t *conn = hash_table_get_instance(item, connection_t, link);
 	return (key[0] == conn->in_phone_hash);
@@ -314,4 +351,6 @@
 void async_insert_timeout(awaiter_t *wd)
 {
+	assert(wd);
+	
 	wd->to_event.occurred = false;
 	wd->to_event.inlist = true;
@@ -346,4 +385,6 @@
 static bool route_call(ipc_callid_t callid, ipc_call_t *call)
 {
+	assert(call);
+	
 	futex_down(&async_futex);
 	
@@ -400,4 +441,6 @@
 static int notification_fibril(void *arg)
 {
+	assert(arg);
+	
 	msg_t *msg = (msg_t *) arg;
 	interrupt_received(msg->callid, &msg->call);
@@ -420,4 +463,6 @@
 static bool process_notification(ipc_callid_t callid, ipc_call_t *call)
 {
+	assert(call);
+	
 	futex_down(&async_futex);
 	
@@ -458,13 +503,14 @@
 ipc_callid_t async_get_call_timeout(ipc_call_t *call, suseconds_t usecs)
 {
-	assert(FIBRIL_connection);
+	assert(call);
+	assert(fibril_connection);
 	
 	/* Why doing this?
-	 * GCC 4.1.0 coughs on FIBRIL_connection-> dereference.
+	 * GCC 4.1.0 coughs on fibril_connection-> dereference.
 	 * GCC 4.1.1 happilly puts the rdhwr instruction in delay slot.
 	 *           I would never expect to find so many errors in
 	 *           a compiler.
 	 */
-	connection_t *conn = FIBRIL_connection;
+	connection_t *conn = fibril_connection;
 	
 	futex_down(&async_futex);
@@ -541,8 +587,10 @@
 static int connection_fibril(void *arg)
 {
+	assert(arg);
+	
 	/*
 	 * Setup fibril-local connection pointer.
 	 */
-	FIBRIL_connection = (connection_t *) arg;
+	fibril_connection = (connection_t *) arg;
 	
 	futex_down(&async_futex);
@@ -554,5 +602,5 @@
 	 */
 	
-	unsigned long key = FIBRIL_connection->in_task_hash;
+	unsigned long key = fibril_connection->in_task_hash;
 	link_t *lnk = hash_table_find(&client_hash_table, &key);
 	
@@ -561,20 +609,17 @@
 	if (lnk) {
 		client = hash_table_get_instance(lnk, client_t, link);
-		client->refcnt++;
+		atomic_inc(&client->refcnt);
 	} else {
 		client = malloc(sizeof(client_t));
 		if (!client) {
-			ipc_answer_0(FIBRIL_connection->callid, ENOMEM);
+			ipc_answer_0(fibril_connection->callid, ENOMEM);
 			futex_up(&async_futex);
 			return 0;
 		}
 		
-		client->in_task_hash = FIBRIL_connection->in_task_hash;
-		
-		async_serialize_start();
+		client->in_task_hash = fibril_connection->in_task_hash;
 		client->data = async_client_data_create();
-		async_serialize_end();
-		
-		client->refcnt = 1;
+		
+		atomic_set(&client->refcnt, 1);
 		hash_table_insert(&client_hash_table, &key, &client->link);
 	}
@@ -582,11 +627,11 @@
 	futex_up(&async_futex);
 	
-	FIBRIL_connection->client = client;
+	fibril_connection->client = client;
 	
 	/*
 	 * Call the connection handler function.
 	 */
-	FIBRIL_connection->cfibril(FIBRIL_connection->callid,
-	    &FIBRIL_connection->call);
+	fibril_connection->cfibril(fibril_connection->callid,
+	    &fibril_connection->call);
 	
 	/*
@@ -597,5 +642,5 @@
 	futex_down(&async_futex);
 	
-	if (--client->refcnt == 0) {
+	if (atomic_predec(&client->refcnt) == 0) {
 		hash_table_remove(&client_hash_table, &key, 1);
 		destroy = true;
@@ -616,5 +661,5 @@
 	 */
 	futex_down(&async_futex);
-	key = FIBRIL_connection->in_phone_hash;
+	key = fibril_connection->in_phone_hash;
 	hash_table_remove(&conn_hash_table, &key, 1);
 	futex_up(&async_futex);
@@ -623,7 +668,7 @@
 	 * Answer all remaining messages with EHANGUP.
 	 */
-	while (!list_empty(&FIBRIL_connection->msg_queue)) {
+	while (!list_empty(&fibril_connection->msg_queue)) {
 		msg_t *msg =
-		    list_get_instance(FIBRIL_connection->msg_queue.next, msg_t,
+		    list_get_instance(fibril_connection->msg_queue.next, msg_t,
 		    link);
 		
@@ -637,8 +682,8 @@
 	 * i.e. IPC_M_PHONE_HUNGUP.
 	 */
-	if (FIBRIL_connection->close_callid)
-		ipc_answer_0(FIBRIL_connection->close_callid, EOK);
-	
-	free(FIBRIL_connection);
+	if (fibril_connection->close_callid)
+		ipc_answer_0(fibril_connection->close_callid, EOK);
+	
+	free(fibril_connection);
 	return 0;
 }
@@ -646,5 +691,5 @@
 /** Create a new fibril for a new connection.
  *
- * Create new fibril for connection, fill in connection structures and inserts
+ * Create new fibril for connection, fill in connection structures and insert
  * it into the hash table, so that later we can easily do routing of messages to
  * particular fibrils.
@@ -665,5 +710,5 @@
 fid_t async_new_connection(sysarg_t in_task_hash, sysarg_t in_phone_hash,
     ipc_callid_t callid, ipc_call_t *call,
-    void (*cfibril)(ipc_callid_t, ipc_call_t *))
+    async_client_conn_t cfibril)
 {
 	connection_t *conn = malloc(sizeof(*conn));
@@ -721,4 +766,6 @@
 static void handle_call(ipc_callid_t callid, ipc_call_t *call)
 {
+	assert(call);
+	
 	/* Unrouted call - take some default action */
 	if ((callid & IPC_CALLID_NOTIFICATION)) {
@@ -878,11 +925,25 @@
 void __async_init(void)
 {
-	if (!hash_table_create(&client_hash_table, CLIENT_HASH_TABLE_BUCKETS, 1,
-	    &client_hash_table_ops))
+	if (!hash_table_create(&client_hash_table, CLIENT_HASH_TABLE_BUCKETS,
+	    1, &client_hash_table_ops))
 		abort();
 	
-	if (!hash_table_create(&conn_hash_table, CONN_HASH_TABLE_BUCKETS, 1,
-	    &conn_hash_table_ops))
+	if (!hash_table_create(&conn_hash_table, CONN_HASH_TABLE_BUCKETS,
+	    1, &conn_hash_table_ops))
 		abort();
+	
+	session_ns = (async_sess_t *) malloc(sizeof(async_sess_t));
+	if (session_ns == NULL)
+		abort();
+	
+	session_ns->mgmt = EXCHANGE_ATOMIC;
+	session_ns->phone = PHONE_NS;
+	session_ns->arg1 = 0;
+	session_ns->arg2 = 0;
+	session_ns->arg3 = 0;
+	
+	list_initialize(&session_ns->exch_list);
+	fibril_mutex_initialize(&session_ns->mutex);
+	atomic_set(&session_ns->refcnt, 0);
 }
 
@@ -899,6 +960,8 @@
  *
  */
-static void reply_received(void *arg, int retval, ipc_call_t *data)
-{
+void reply_received(void *arg, int retval, ipc_call_t *data)
+{
+	assert(arg);
+	
 	futex_down(&async_futex);
 	
@@ -930,6 +993,6 @@
  * completion.
  *
- * @param phoneid Handle of the phone that will be used for the send.
- * @param method  Service-defined method.
+ * @param exch    Exchange for sending the message.
+ * @param imethod Service-defined interface and method.
  * @param arg1    Service-defined payload argument.
  * @param arg2    Service-defined payload argument.
@@ -942,10 +1005,12 @@
  *
  */
-aid_t async_send_fast(int phoneid, sysarg_t method, sysarg_t arg1,
+aid_t async_send_fast(async_exch_t *exch, sysarg_t imethod, sysarg_t arg1,
     sysarg_t arg2, sysarg_t arg3, sysarg_t arg4, ipc_call_t *dataptr)
 {
+	if (exch == NULL)
+		return 0;
+	
 	amsg_t *msg = malloc(sizeof(amsg_t));
-	
-	if (!msg)
+	if (msg == NULL)
 		return 0;
 	
@@ -961,5 +1026,5 @@
 	msg->wdata.active = true;
 	
-	ipc_call_async_4(phoneid, method, arg1, arg2, arg3, arg4, msg,
+	ipc_call_async_4(exch->phone, imethod, arg1, arg2, arg3, arg4, msg,
 	    reply_received, true);
 	
@@ -972,6 +1037,6 @@
  * completion.
  *
- * @param phoneid Handle of the phone that will be used for the send.
- * @param method  Service-defined method.
+ * @param exch    Exchange for sending the message.
+ * @param imethod Service-defined interface and method.
  * @param arg1    Service-defined payload argument.
  * @param arg2    Service-defined payload argument.
@@ -985,11 +1050,14 @@
  *
  */
-aid_t async_send_slow(int phoneid, sysarg_t method, sysarg_t arg1,
+aid_t async_send_slow(async_exch_t *exch, sysarg_t imethod, sysarg_t arg1,
     sysarg_t arg2, sysarg_t arg3, sysarg_t arg4, sysarg_t arg5,
     ipc_call_t *dataptr)
 {
+	if (exch == NULL)
+		return 0;
+	
 	amsg_t *msg = malloc(sizeof(amsg_t));
 	
-	if (!msg)
+	if (msg == NULL)
 		return 0;
 	
@@ -1005,6 +1073,6 @@
 	msg->wdata.active = true;
 	
-	ipc_call_async_5(phoneid, method, arg1, arg2, arg3, arg4, arg5, msg,
-	    reply_received, true);
+	ipc_call_async_5(exch->phone, imethod, arg1, arg2, arg3, arg4, arg5,
+	    msg, reply_received, true);
 	
 	return (aid_t) msg;
@@ -1020,4 +1088,6 @@
 void async_wait_for(aid_t amsgid, sysarg_t *retval)
 {
+	assert(amsgid);
+	
 	amsg_t *msg = (amsg_t *) amsgid;
 	
@@ -1056,4 +1126,6 @@
 int async_wait_timeout(aid_t amsgid, sysarg_t *retval, suseconds_t timeout)
 {
+	assert(amsgid);
+	
 	amsg_t *msg = (amsg_t *) amsgid;
 	
@@ -1124,24 +1196,4 @@
 }
 
-/** Setter for client_connection function pointer.
- *
- * @param conn Function that will implement a new connection fibril.
- *
- */
-void async_set_client_connection(async_client_conn_t conn)
-{
-	client_connection = conn;
-}
-
-/** Setter for interrupt_received function pointer.
- *
- * @param intr Function that will implement a new interrupt
- *             notification fibril.
- */
-void async_set_interrupt_received(async_client_conn_t intr)
-{
-	interrupt_received = intr;
-}
-
 /** Pseudo-synchronous message sending - fast version.
  *
@@ -1151,6 +1203,6 @@
  * transferring more arguments, see the slower async_req_slow().
  *
- * @param phoneid Hash of the phone through which to make the call.
- * @param method  Method of the call.
+ * @param exch    Exchange for sending the message.
+ * @param imethod Interface and method of the call.
  * @param arg1    Service-defined payload argument.
  * @param arg2    Service-defined payload argument.
@@ -1166,14 +1218,17 @@
  *
  */
-sysarg_t async_req_fast(int phoneid, sysarg_t method, sysarg_t arg1,
+sysarg_t async_req_fast(async_exch_t *exch, sysarg_t imethod, sysarg_t arg1,
     sysarg_t arg2, sysarg_t arg3, sysarg_t arg4, sysarg_t *r1, sysarg_t *r2,
     sysarg_t *r3, sysarg_t *r4, sysarg_t *r5)
 {
+	if (exch == NULL)
+		return ENOENT;
+	
 	ipc_call_t result;
-	aid_t eid = async_send_4(phoneid, method, arg1, arg2, arg3, arg4,
+	aid_t aid = async_send_4(exch, imethod, arg1, arg2, arg3, arg4,
 	    &result);
 	
 	sysarg_t rc;
-	async_wait_for(eid, &rc);
+	async_wait_for(aid, &rc);
 	
 	if (r1)
@@ -1199,6 +1254,6 @@
  * Send message asynchronously and return only after the reply arrives.
  *
- * @param phoneid Hash of the phone through which to make the call.
- * @param method  Method of the call.
+ * @param exch    Exchange for sending the message.
+ * @param imethod Interface and method of the call.
  * @param arg1    Service-defined payload argument.
  * @param arg2    Service-defined payload argument.
@@ -1215,14 +1270,17 @@
  *
  */
-sysarg_t async_req_slow(int phoneid, sysarg_t method, sysarg_t arg1,
+sysarg_t async_req_slow(async_exch_t *exch, sysarg_t imethod, sysarg_t arg1,
     sysarg_t arg2, sysarg_t arg3, sysarg_t arg4, sysarg_t arg5, sysarg_t *r1,
     sysarg_t *r2, sysarg_t *r3, sysarg_t *r4, sysarg_t *r5)
 {
+	if (exch == NULL)
+		return ENOENT;
+	
 	ipc_call_t result;
-	aid_t eid = async_send_5(phoneid, method, arg1, arg2, arg3, arg4, arg5,
+	aid_t aid = async_send_5(exch, imethod, arg1, arg2, arg3, arg4, arg5,
 	    &result);
 	
 	sysarg_t rc;
-	async_wait_for(eid, &rc);
+	async_wait_for(aid, &rc);
 	
 	if (r1)
@@ -1244,37 +1302,46 @@
 }
 
-void async_msg_0(int phone, sysarg_t imethod)
-{
-	ipc_call_async_0(phone, imethod, NULL, NULL, true);
-}
-
-void async_msg_1(int phone, sysarg_t imethod, sysarg_t arg1)
-{
-	ipc_call_async_1(phone, imethod, arg1, NULL, NULL, true);
-}
-
-void async_msg_2(int phone, sysarg_t imethod, sysarg_t arg1, sysarg_t arg2)
-{
-	ipc_call_async_2(phone, imethod, arg1, arg2, NULL, NULL, true);
-}
-
-void async_msg_3(int phone, sysarg_t imethod, sysarg_t arg1, sysarg_t arg2,
-    sysarg_t arg3)
-{
-	ipc_call_async_3(phone, imethod, arg1, arg2, arg3, NULL, NULL, true);
-}
-
-void async_msg_4(int phone, sysarg_t imethod, sysarg_t arg1, sysarg_t arg2,
-    sysarg_t arg3, sysarg_t arg4)
-{
-	ipc_call_async_4(phone, imethod, arg1, arg2, arg3, arg4, NULL, NULL,
-	    true);
-}
-
-void async_msg_5(int phone, sysarg_t imethod, sysarg_t arg1, sysarg_t arg2,
-    sysarg_t arg3, sysarg_t arg4, sysarg_t arg5)
-{
-	ipc_call_async_5(phone, imethod, arg1, arg2, arg3, arg4, arg5, NULL,
-	    NULL, true);
+void async_msg_0(async_exch_t *exch, sysarg_t imethod)
+{
+	if (exch != NULL)
+		ipc_call_async_0(exch->phone, imethod, NULL, NULL, true);
+}
+
+void async_msg_1(async_exch_t *exch, sysarg_t imethod, sysarg_t arg1)
+{
+	if (exch != NULL)
+		ipc_call_async_1(exch->phone, imethod, arg1, NULL, NULL, true);
+}
+
+void async_msg_2(async_exch_t *exch, sysarg_t imethod, sysarg_t arg1,
+    sysarg_t arg2)
+{
+	if (exch != NULL)
+		ipc_call_async_2(exch->phone, imethod, arg1, arg2, NULL, NULL,
+		    true);
+}
+
+void async_msg_3(async_exch_t *exch, sysarg_t imethod, sysarg_t arg1,
+    sysarg_t arg2, sysarg_t arg3)
+{
+	if (exch != NULL)
+		ipc_call_async_3(exch->phone, imethod, arg1, arg2, arg3, NULL,
+		    NULL, true);
+}
+
+void async_msg_4(async_exch_t *exch, sysarg_t imethod, sysarg_t arg1,
+    sysarg_t arg2, sysarg_t arg3, sysarg_t arg4)
+{
+	if (exch != NULL)
+		ipc_call_async_4(exch->phone, imethod, arg1, arg2, arg3, arg4,
+		    NULL, NULL, true);
+}
+
+void async_msg_5(async_exch_t *exch, sysarg_t imethod, sysarg_t arg1,
+    sysarg_t arg2, sysarg_t arg3, sysarg_t arg4, sysarg_t arg5)
+{
+	if (exch != NULL)
+		ipc_call_async_5(exch->phone, imethod, arg1, arg2, arg3, arg4,
+		    arg5, NULL, NULL, true);
 }
 
@@ -1313,16 +1380,22 @@
 }
 
-int async_forward_fast(ipc_callid_t callid, int phoneid, sysarg_t imethod,
-    sysarg_t arg1, sysarg_t arg2, unsigned int mode)
-{
-	return ipc_forward_fast(callid, phoneid, imethod, arg1, arg2, mode);
-}
-
-int async_forward_slow(ipc_callid_t callid, int phoneid, sysarg_t imethod,
-    sysarg_t arg1, sysarg_t arg2, sysarg_t arg3, sysarg_t arg4, sysarg_t arg5,
-    unsigned int mode)
-{
-	return ipc_forward_slow(callid, phoneid, imethod, arg1, arg2, arg3, arg4,
-	    arg5, mode);
+int async_forward_fast(ipc_callid_t callid, async_exch_t *exch,
+    sysarg_t imethod, sysarg_t arg1, sysarg_t arg2, unsigned int mode)
+{
+	if (exch == NULL)
+		return ENOENT;
+	
+	return ipc_forward_fast(callid, exch->phone, imethod, arg1, arg2, mode);
+}
+
+int async_forward_slow(ipc_callid_t callid, async_exch_t *exch,
+    sysarg_t imethod, sysarg_t arg1, sysarg_t arg2, sysarg_t arg3,
+    sysarg_t arg4, sysarg_t arg5, unsigned int mode)
+{
+	if (exch == NULL)
+		return ENOENT;
+	
+	return ipc_forward_slow(callid, exch->phone, imethod, arg1, arg2, arg3,
+	    arg4, arg5, mode);
 }
 
@@ -1331,5 +1404,5 @@
  * Ask through phone for a new connection to some service.
  *
- * @param phone           Phone handle used for contacting the other side.
+ * @param exch            Exchange for sending the message.
  * @param arg1            User defined argument.
  * @param arg2            User defined argument.
@@ -1337,13 +1410,16 @@
  * @param client_receiver Connection handing routine.
  *
- * @return New phone handle on success or a negative error code.
- *
- */
-int async_connect_to_me(int phone, sysarg_t arg1, sysarg_t arg2,
+ * @return Zero on success or a negative error code.
+ *
+ */
+int async_connect_to_me(async_exch_t *exch, sysarg_t arg1, sysarg_t arg2,
     sysarg_t arg3, async_client_conn_t client_receiver)
 {
+	if (exch == NULL)
+		return ENOENT;
+	
 	sysarg_t task_hash;
 	sysarg_t phone_hash;
-	int rc = async_req_3_5(phone, IPC_M_CONNECT_TO_ME, arg1, arg2, arg3,
+	int rc = async_req_3_5(exch, IPC_M_CONNECT_TO_ME, arg1, arg2, arg3,
 	    NULL, NULL, NULL, &task_hash, &phone_hash);
 	if (rc != EOK)
@@ -1357,27 +1433,159 @@
 }
 
-/** Wrapper for making IPC_M_CONNECT_ME_TO calls using the async framework.
- *
- * Ask through phone for a new connection to some service.
- *
- * @param phone Phone handle used for contacting the other side.
- * @param arg1  User defined argument.
- * @param arg2  User defined argument.
- * @param arg3  User defined argument.
- *
- * @return New phone handle on success or a negative error code.
- *
- */
-int async_connect_me_to(int phone, sysarg_t arg1, sysarg_t arg2,
-    sysarg_t arg3)
-{
-	sysarg_t newphid;
-	int rc = async_req_3_5(phone, IPC_M_CONNECT_ME_TO, arg1, arg2, arg3,
-	    NULL, NULL, NULL, NULL, &newphid);
+/** Wrapper for making IPC_M_CONNECT_ME calls using the async framework.
+ *
+ * Ask through for a cloned connection to some service.
+ *
+ * @param mgmt Exchange management style.
+ * @param exch Exchange for sending the message.
+ *
+ * @return New session on success or NULL on error.
+ *
+ */
+async_sess_t *async_connect_me(exch_mgmt_t mgmt, async_exch_t *exch)
+{
+	if (exch == NULL) {
+		errno = ENOENT;
+		return NULL;
+	}
+	
+	async_sess_t *sess = (async_sess_t *) malloc(sizeof(async_sess_t));
+	if (sess == NULL) {
+		errno = ENOMEM;
+		return NULL;
+	}
+	
+	ipc_call_t result;
+	
+	amsg_t *msg = malloc(sizeof(amsg_t));
+	if (msg == NULL) {
+		free(sess);
+		errno = ENOMEM;
+		return NULL;
+	}
+	
+	msg->done = false;
+	msg->dataptr = &result;
+	
+	msg->wdata.to_event.inlist = false;
+	
+	/*
+	 * We may sleep in the next method,
+	 * but it will use its own means
+	 */
+	msg->wdata.active = true;
+	
+	ipc_call_async_0(exch->phone, IPC_M_CONNECT_ME, msg,
+	    reply_received, true);
+	
+	sysarg_t rc;
+	async_wait_for((aid_t) msg, &rc);
+	
+	if (rc != EOK) {
+		errno = rc;
+		free(sess);
+		return NULL;
+	}
+	
+	int phone = (int) IPC_GET_ARG5(result);
+	
+	if (phone < 0) {
+		errno = phone;
+		free(sess);
+		return NULL;
+	}
+	
+	sess->mgmt = mgmt;
+	sess->phone = phone;
+	sess->arg1 = 0;
+	sess->arg2 = 0;
+	sess->arg3 = 0;
+	
+	list_initialize(&sess->exch_list);
+	fibril_mutex_initialize(&sess->mutex);
+	atomic_set(&sess->refcnt, 0);
+	
+	return sess;
+}
+
+static int async_connect_me_to_internal(int phone, sysarg_t arg1, sysarg_t arg2,
+    sysarg_t arg3, sysarg_t arg4)
+{
+	ipc_call_t result;
+	
+	amsg_t *msg = malloc(sizeof(amsg_t));
+	if (msg == NULL)
+		return ENOENT;
+	
+	msg->done = false;
+	msg->dataptr = &result;
+	
+	msg->wdata.to_event.inlist = false;
+	
+	/*
+	 * We may sleep in the next method,
+	 * but it will use its own means
+	 */
+	msg->wdata.active = true;
+	
+	ipc_call_async_4(phone, IPC_M_CONNECT_ME_TO, arg1, arg2, arg3, arg4,
+	    msg, reply_received, true);
+	
+	sysarg_t rc;
+	async_wait_for((aid_t) msg, &rc);
 	
 	if (rc != EOK)
 		return rc;
 	
-	return newphid;
+	return (int) IPC_GET_ARG5(result);
+}
+
+/** Wrapper for making IPC_M_CONNECT_ME_TO calls using the async framework.
+ *
+ * Ask through for a new connection to some service.
+ *
+ * @param mgmt Exchange management style.
+ * @param exch Exchange for sending the message.
+ * @param arg1 User defined argument.
+ * @param arg2 User defined argument.
+ * @param arg3 User defined argument.
+ *
+ * @return New session on success or NULL on error.
+ *
+ */
+async_sess_t *async_connect_me_to(exch_mgmt_t mgmt, async_exch_t *exch,
+    sysarg_t arg1, sysarg_t arg2, sysarg_t arg3)
+{
+	if (exch == NULL) {
+		errno = ENOENT;
+		return NULL;
+	}
+	
+	async_sess_t *sess = (async_sess_t *) malloc(sizeof(async_sess_t));
+	if (sess == NULL) {
+		errno = ENOMEM;
+		return NULL;
+	}
+	
+	int phone = async_connect_me_to_internal(exch->phone, arg1, arg2, arg3,
+	    0);
+	
+	if (phone < 0) {
+		errno = phone;
+		free(sess);
+		return NULL;
+	}
+	
+	sess->mgmt = mgmt;
+	sess->phone = phone;
+	sess->arg1 = arg1;
+	sess->arg2 = arg2;
+	sess->arg3 = arg3;
+	
+	list_initialize(&sess->exch_list);
+	fibril_mutex_initialize(&sess->mutex);
+	atomic_set(&sess->refcnt, 0);
+	
+	return sess;
 }
 
@@ -1387,23 +1595,47 @@
  * success.
  *
- * @param phoneid Phone handle used for contacting the other side.
- * @param arg1    User defined argument.
- * @param arg2    User defined argument.
- * @param arg3    User defined argument.
- *
- * @return New phone handle on success or a negative error code.
- *
- */
-int async_connect_me_to_blocking(int phoneid, sysarg_t arg1, sysarg_t arg2,
-    sysarg_t arg3)
-{
-	sysarg_t newphid;
-	int rc = async_req_4_5(phoneid, IPC_M_CONNECT_ME_TO, arg1, arg2, arg3,
-	    IPC_FLAG_BLOCKING, NULL, NULL, NULL, NULL, &newphid);
-	
-	if (rc != EOK)
-		return rc;
-	
-	return newphid;
+ * @param mgmt Exchange management style.
+ * @param exch Exchange for sending the message.
+ * @param arg1 User defined argument.
+ * @param arg2 User defined argument.
+ * @param arg3 User defined argument.
+ *
+ * @return New session on success or NULL on error.
+ *
+ */
+async_sess_t *async_connect_me_to_blocking(exch_mgmt_t mgmt, async_exch_t *exch,
+    sysarg_t arg1, sysarg_t arg2, sysarg_t arg3)
+{
+	if (exch == NULL) {
+		errno = ENOENT;
+		return NULL;
+	}
+	
+	async_sess_t *sess = (async_sess_t *) malloc(sizeof(async_sess_t));
+	if (sess == NULL) {
+		errno = ENOMEM;
+		return NULL;
+	}
+	
+	int phone = async_connect_me_to_internal(exch->phone, arg1, arg2, arg3,
+	    IPC_FLAG_BLOCKING);
+	
+	if (phone < 0) {
+		errno = phone;
+		free(sess);
+		return NULL;
+	}
+	
+	sess->mgmt = mgmt;
+	sess->phone = phone;
+	sess->arg1 = arg1;
+	sess->arg2 = arg2;
+	sess->arg3 = arg3;
+	
+	list_initialize(&sess->exch_list);
+	fibril_mutex_initialize(&sess->mutex);
+	atomic_set(&sess->refcnt, 0);
+	
+	return sess;
 }
 
@@ -1411,19 +1643,56 @@
  *
  */
-int async_connect_kbox(task_id_t id)
-{
-	return ipc_connect_kbox(id);
+async_sess_t *async_connect_kbox(task_id_t id)
+{
+	async_sess_t *sess = (async_sess_t *) malloc(sizeof(async_sess_t));
+	if (sess == NULL) {
+		errno = ENOMEM;
+		return NULL;
+	}
+	
+	int phone = ipc_connect_kbox(id);
+	if (phone < 0) {
+		errno = phone;
+		free(sess);
+		return NULL;
+	}
+	
+	sess->mgmt = EXCHANGE_ATOMIC;
+	sess->phone = phone;
+	sess->arg1 = 0;
+	sess->arg2 = 0;
+	sess->arg3 = 0;
+	
+	list_initialize(&sess->exch_list);
+	fibril_mutex_initialize(&sess->mutex);
+	atomic_set(&sess->refcnt, 0);
+	
+	return sess;
+}
+
+static int async_hangup_internal(int phone)
+{
+	return ipc_hangup(phone);
 }
 
 /** Wrapper for ipc_hangup.
  *
- * @param phone Phone handle to hung up.
+ * @param sess Session to hung up.
  *
  * @return Zero on success or a negative error code.
  *
  */
-int async_hangup(int phone)
-{
-	return ipc_hangup(phone);
+int async_hangup(async_sess_t *sess)
+{
+	assert(sess);
+	
+	if (atomic_get(&sess->refcnt) > 0)
+		return EBUSY;
+	
+	int rc = async_hangup_internal(sess->phone);
+	if (rc == EOK)
+		free(sess);
+	
+	return rc;
 }
 
@@ -1434,20 +1703,140 @@
 }
 
+/** Start new exchange in a session.
+ *
+ * @param session Session.
+ *
+ * @return New exchange or NULL on error.
+ *
+ */
+async_exch_t *async_exchange_begin(async_sess_t *sess)
+{
+	if (sess == NULL)
+		return NULL;
+	
+	async_exch_t *exch;
+	
+	fibril_mutex_lock(&async_sess_mutex);
+	
+	if (!list_empty(&sess->exch_list)) {
+		/*
+		 * There are inactive exchanges in the session.
+		 */
+		exch = (async_exch_t *)
+		    list_get_instance(sess->exch_list.next, async_exch_t, sess_link);
+		list_remove(&exch->sess_link);
+		list_remove(&exch->global_link);
+	} else {
+		/*
+		 * There are no available exchanges in the session.
+		 */
+		
+		if ((sess->mgmt == EXCHANGE_ATOMIC) ||
+		    (sess->mgmt == EXCHANGE_SERIALIZE)) {
+			exch = (async_exch_t *) malloc(sizeof(async_exch_t));
+			if (exch != NULL) {
+				list_initialize(&exch->sess_link);
+				list_initialize(&exch->global_link);
+				exch->sess = sess;
+				exch->phone = sess->phone;
+			}
+		} else {  /* EXCHANGE_PARALLEL */
+			/*
+			 * Make a one-time attempt to connect a new data phone.
+			 */
+			
+			int phone;
+			
+retry:
+			phone = async_connect_me_to_internal(sess->phone, sess->arg1,
+			    sess->arg2, sess->arg3, 0);
+			if (phone >= 0) {
+				exch = (async_exch_t *) malloc(sizeof(async_exch_t));
+				if (exch != NULL) {
+					list_initialize(&exch->sess_link);
+					list_initialize(&exch->global_link);
+					exch->sess = sess;
+					exch->phone = phone;
+				} else
+					async_hangup_internal(phone);
+			} else if (!list_empty(&inactive_exch_list)) {
+				/*
+				 * We did not manage to connect a new phone. But we
+				 * can try to close some of the currently inactive
+				 * connections in other sessions and try again.
+				 */
+				exch = (async_exch_t *)
+				    list_get_instance(inactive_exch_list.next, async_exch_t,
+				    global_link);
+				list_remove(&exch->sess_link);
+				list_remove(&exch->global_link);
+				async_hangup_internal(exch->phone);
+				free(exch);
+				goto retry;
+			} else {
+				/*
+				 * Wait for a phone to become available.
+				 */
+				fibril_condvar_wait(&avail_phone_cv, &async_sess_mutex);
+				goto retry;
+			}
+		}
+	}
+	
+	fibril_mutex_unlock(&async_sess_mutex);
+	
+	if (exch != NULL) {
+		atomic_inc(&sess->refcnt);
+		
+		if (sess->mgmt == EXCHANGE_SERIALIZE)
+			fibril_mutex_lock(&sess->mutex);
+	}
+	
+	return exch;
+}
+
+/** Finish an exchange.
+ *
+ * @param exch Exchange to finish.
+ *
+ */
+void async_exchange_end(async_exch_t *exch)
+{
+	if (exch == NULL)
+		return;
+	
+	async_sess_t *sess = exch->sess;
+	
+	if (sess->mgmt == EXCHANGE_SERIALIZE)
+		fibril_mutex_unlock(&sess->mutex);
+	
+	fibril_mutex_lock(&async_sess_mutex);
+	
+	list_append(&exch->sess_link, &sess->exch_list);
+	list_append(&exch->global_link, &inactive_exch_list);
+	fibril_condvar_signal(&avail_phone_cv);
+	
+	fibril_mutex_unlock(&async_sess_mutex);
+}
+
 /** Wrapper for IPC_M_SHARE_IN calls using the async framework.
  *
- * @param phoneid Phone that will be used to contact the receiving side.
- * @param dst     Destination address space area base.
- * @param size    Size of the destination address space area.
- * @param arg     User defined argument.
- * @param flags   Storage for the received flags. Can be NULL.
+ * @param exch  Exchange for sending the message.
+ * @param dst   Destination address space area base.
+ * @param size  Size of the destination address space area.
+ * @param arg   User defined argument.
+ * @param flags Storage for the received flags. Can be NULL.
  *
  * @return Zero on success or a negative error code from errno.h.
  *
  */
-int async_share_in_start(int phoneid, void *dst, size_t size, sysarg_t arg,
-    unsigned int *flags)
-{
+int async_share_in_start(async_exch_t *exch, void *dst, size_t size,
+    sysarg_t arg, unsigned int *flags)
+{
+	if (exch == NULL)
+		return ENOENT;
+	
 	sysarg_t tmp_flags;
-	int res = async_req_3_2(phoneid, IPC_M_SHARE_IN, (sysarg_t) dst,
+	int res = async_req_3_2(exch, IPC_M_SHARE_IN, (sysarg_t) dst,
 	    (sysarg_t) size, arg, NULL, &tmp_flags);
 	
@@ -1507,14 +1896,17 @@
 /** Wrapper for IPC_M_SHARE_OUT calls using the async framework.
  *
- * @param phoneid Phone that will be used to contact the receiving side.
- * @param src     Source address space area base address.
- * @param flags   Flags to be used for sharing. Bits can be only cleared.
+ * @param exch  Exchange for sending the message.
+ * @param src   Source address space area base address.
+ * @param flags Flags to be used for sharing. Bits can be only cleared.
  *
  * @return Zero on success or a negative error code from errno.h.
  *
  */
-int async_share_out_start(int phoneid, void *src, unsigned int flags)
-{
-	return async_req_3_0(phoneid, IPC_M_SHARE_OUT, (sysarg_t) src, 0,
+int async_share_out_start(async_exch_t *exch, void *src, unsigned int flags)
+{
+	if (exch == NULL)
+		return ENOENT;
+	
+	return async_req_3_0(exch, IPC_M_SHARE_OUT, (sysarg_t) src, 0,
 	    (sysarg_t) flags);
 }
@@ -1569,19 +1961,37 @@
 }
 
+/** Start IPC_M_DATA_READ using the async framework.
+ *
+ * @param exch    Exchange for sending the message.
+ * @param dst     Address of the beginning of the destination buffer.
+ * @param size    Size of the destination buffer (in bytes).
+ * @param dataptr Storage of call data (arg 2 holds actual data size).
+ *
+ * @return Hash of the sent message or 0 on error.
+ *
+ */
+aid_t async_data_read(async_exch_t *exch, void *dst, size_t size,
+    ipc_call_t *dataptr)
+{
+	return async_send_2(exch, IPC_M_DATA_READ, (sysarg_t) dst,
+	    (sysarg_t) size, dataptr);
+}
+
 /** Wrapper for IPC_M_DATA_READ calls using the async framework.
  *
- * @param phoneid Phone that will be used to contact the receiving side.
- * @param dst     Address of the beginning of the destination buffer.
- * @param size    Size of the destination buffer.
- * @param flags   Flags to control the data transfer.
+ * @param exch Exchange for sending the message.
+ * @param dst  Address of the beginning of the destination buffer.
+ * @param size Size of the destination buffer.
  *
  * @return Zero on success or a negative error code from errno.h.
  *
  */
-int
-async_data_read_start_generic(int phoneid, void *dst, size_t size, int flags)
-{
-	return async_req_3_0(phoneid, IPC_M_DATA_READ, (sysarg_t) dst,
-	    (sysarg_t) size, (sysarg_t) flags);
+int async_data_read_start(async_exch_t *exch, void *dst, size_t size)
+{
+	if (exch == NULL)
+		return ENOENT;
+	
+	return async_req_2_0(exch, IPC_M_DATA_READ, (sysarg_t) dst,
+	    (sysarg_t) size);
 }
 
@@ -1638,7 +2048,11 @@
  *
  */
-int async_data_read_forward_fast(int phoneid, sysarg_t method, sysarg_t arg1,
-    sysarg_t arg2, sysarg_t arg3, sysarg_t arg4, ipc_call_t *dataptr)
-{
+int async_data_read_forward_fast(async_exch_t *exch, sysarg_t imethod,
+    sysarg_t arg1, sysarg_t arg2, sysarg_t arg3, sysarg_t arg4,
+    ipc_call_t *dataptr)
+{
+	if (exch == NULL)
+		return ENOENT;
+	
 	ipc_callid_t callid;
 	if (!async_data_read_receive(&callid, NULL)) {
@@ -1647,5 +2061,5 @@
 	}
 	
-	aid_t msg = async_send_fast(phoneid, method, arg1, arg2, arg3, arg4,
+	aid_t msg = async_send_fast(exch, imethod, arg1, arg2, arg3, arg4,
 	    dataptr);
 	if (msg == 0) {
@@ -1654,5 +2068,5 @@
 	}
 	
-	int retval = ipc_forward_fast(callid, phoneid, 0, 0, 0,
+	int retval = ipc_forward_fast(callid, exch->phone, 0, 0, 0,
 	    IPC_FF_ROUTE_FROM_ME);
 	if (retval != EOK) {
@@ -1670,18 +2084,18 @@
 /** Wrapper for IPC_M_DATA_WRITE calls using the async framework.
  *
- * @param phoneid Phone that will be used to contact the receiving side.
- * @param src     Address of the beginning of the source buffer.
- * @param size    Size of the source buffer.
- * @param flags   Flags to control the data transfer.
+ * @param exch Exchange for sending the message.
+ * @param src  Address of the beginning of the source buffer.
+ * @param size Size of the source buffer.
  *
  * @return Zero on success or a negative error code from errno.h.
  *
  */
-int
-async_data_write_start_generic(int phoneid, const void *src, size_t size,
-    int flags)
-{
-	return async_req_3_0(phoneid, IPC_M_DATA_WRITE, (sysarg_t) src,
-	    (sysarg_t) size, (sysarg_t) flags);
+int async_data_write_start(async_exch_t *exch, const void *src, size_t size)
+{
+	if (exch == NULL)
+		return ENOENT;
+	
+	return async_req_2_0(exch, IPC_M_DATA_WRITE, (sysarg_t) src,
+	    (sysarg_t) size);
 }
 
@@ -1759,4 +2173,6 @@
     size_t *received)
 {
+	assert(data);
+	
 	ipc_callid_t callid;
 	size_t size;
@@ -1826,7 +2242,11 @@
  *
  */
-int async_data_write_forward_fast(int phoneid, sysarg_t method, sysarg_t arg1,
-    sysarg_t arg2, sysarg_t arg3, sysarg_t arg4, ipc_call_t *dataptr)
-{
+int async_data_write_forward_fast(async_exch_t *exch, sysarg_t imethod,
+    sysarg_t arg1, sysarg_t arg2, sysarg_t arg3, sysarg_t arg4,
+    ipc_call_t *dataptr)
+{
+	if (exch == NULL)
+		return ENOENT;
+	
 	ipc_callid_t callid;
 	if (!async_data_write_receive(&callid, NULL)) {
@@ -1835,5 +2255,5 @@
 	}
 	
-	aid_t msg = async_send_fast(phoneid, method, arg1, arg2, arg3, arg4,
+	aid_t msg = async_send_fast(exch, imethod, arg1, arg2, arg3, arg4,
 	    dataptr);
 	if (msg == 0) {
@@ -1842,5 +2262,5 @@
 	}
 	
-	int retval = ipc_forward_fast(callid, phoneid, 0, 0, 0,
+	int retval = ipc_forward_fast(callid, exch->phone, 0, 0, 0,
 	    IPC_FF_ROUTE_FROM_ME);
 	if (retval != EOK) {
@@ -1856,4 +2276,105 @@
 }
 
+/** Wrapper for sending an exchange over different exchange for cloning
+ *
+ * @param exch       Exchange to be used for sending.
+ * @param clone_exch Exchange to be cloned.
+ *
+ */
+int async_exchange_clone(async_exch_t *exch, async_exch_t *clone_exch)
+{
+	return async_req_1_0(exch, IPC_M_CONNECTION_CLONE, clone_exch->phone);
+}
+
+/** Wrapper for receiving the IPC_M_CONNECTION_CLONE calls.
+ *
+ * If the current call is IPC_M_CONNECTION_CLONE then a new
+ * async session is created for the accepted phone.
+ *
+ * @param mgmt Exchange management style.
+ *
+ * @return New async session or NULL on failure.
+ *
+ */
+async_sess_t *async_clone_receive(exch_mgmt_t mgmt)
+{
+	/* Accept the phone */
+	ipc_call_t call;
+	ipc_callid_t callid = async_get_call(&call);
+	int phone = (int) IPC_GET_ARG1(call);
+	
+	if ((IPC_GET_IMETHOD(call) != IPC_M_CONNECTION_CLONE) ||
+	    (phone < 0)) {
+		async_answer_0(callid, EINVAL);
+		return NULL;
+	}
+	
+	async_sess_t *sess = (async_sess_t *) malloc(sizeof(async_sess_t));
+	if (sess == NULL) {
+		async_answer_0(callid, ENOMEM);
+		return NULL;
+	}
+	
+	sess->mgmt = mgmt;
+	sess->phone = phone;
+	sess->arg1 = 0;
+	sess->arg2 = 0;
+	sess->arg3 = 0;
+	
+	list_initialize(&sess->exch_list);
+	fibril_mutex_initialize(&sess->mutex);
+	atomic_set(&sess->refcnt, 0);
+	
+	/* Acknowledge the cloned phone */
+	async_answer_0(callid, EOK);
+	
+	return sess;
+}
+
+/** Wrapper for receiving the IPC_M_CONNECT_TO_ME calls.
+ *
+ * If the current call is IPC_M_CONNECT_TO_ME then a new
+ * async session is created for the accepted phone.
+ *
+ * @param mgmt Exchange management style.
+ *
+ * @return New async session or NULL on failure.
+ *
+ */
+async_sess_t *async_callback_receive(exch_mgmt_t mgmt)
+{
+	/* Accept the phone */
+	ipc_call_t call;
+	ipc_callid_t callid = async_get_call(&call);
+	int phone = (int) IPC_GET_ARG5(call);
+	
+	if ((IPC_GET_IMETHOD(call) != IPC_M_CONNECT_TO_ME) ||
+	    (phone < 0)) {
+		async_answer_0(callid, EINVAL);
+		return NULL;
+	}
+	
+	async_sess_t *sess = (async_sess_t *) malloc(sizeof(async_sess_t));
+	if (sess == NULL) {
+		async_answer_0(callid, ENOMEM);
+		return NULL;
+	}
+	
+	sess->mgmt = mgmt;
+	sess->phone = phone;
+	sess->arg1 = 0;
+	sess->arg2 = 0;
+	sess->arg3 = 0;
+	
+	list_initialize(&sess->exch_list);
+	fibril_mutex_initialize(&sess->mutex);
+	atomic_set(&sess->refcnt, 0);
+	
+	/* Acknowledge the connected phone */
+	async_answer_0(callid, EOK);
+	
+	return sess;
+}
+
 /** @}
  */
Index: uspace/lib/c/generic/async_obsolete.c
===================================================================
--- uspace/lib/c/generic/async_obsolete.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/c/generic/async_obsolete.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,460 @@
+/*
+ * Copyright (c) 2006 Ondrej Palkovsky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+/** @file
+ */
+
+#define LIBC_ASYNC_C_
+#define LIBC_ASYNC_OBSOLETE_C_
+#include <ipc/ipc.h>
+#include <async.h>
+#include <async_obsolete.h>
+#undef LIBC_ASYNC_C_
+#undef LIBC_ASYNC_OBSOLETE_C_
+
+#include <fibril.h>
+#include <malloc.h>
+#include <errno.h>
+#include "private/async.h"
+
+/** Send message and return id of the sent message.
+ *
+ * The return value can be used as input for async_wait() to wait for
+ * completion.
+ *
+ * @param phoneid Handle of the phone that will be used for the send.
+ * @param method  Service-defined method.
+ * @param arg1    Service-defined payload argument.
+ * @param arg2    Service-defined payload argument.
+ * @param arg3    Service-defined payload argument.
+ * @param arg4    Service-defined payload argument.
+ * @param dataptr If non-NULL, storage where the reply data will be
+ *                stored.
+ *
+ * @return Hash of the sent message or 0 on error.
+ *
+ */
+aid_t async_obsolete_send_fast(int phoneid, sysarg_t method, sysarg_t arg1,
+    sysarg_t arg2, sysarg_t arg3, sysarg_t arg4, ipc_call_t *dataptr)
+{
+	amsg_t *msg = malloc(sizeof(amsg_t));
+	
+	if (!msg)
+		return 0;
+	
+	msg->done = false;
+	msg->dataptr = dataptr;
+	
+	msg->wdata.to_event.inlist = false;
+	
+	/*
+	 * We may sleep in the next method,
+	 * but it will use its own means
+	 */
+	msg->wdata.active = true;
+	
+	ipc_call_async_4(phoneid, method, arg1, arg2, arg3, arg4, msg,
+	    reply_received, true);
+	
+	return (aid_t) msg;
+}
+
+/** Pseudo-synchronous message sending - fast version.
+ *
+ * Send message asynchronously and return only after the reply arrives.
+ *
+ * This function can only transfer 4 register payload arguments. For
+ * transferring more arguments, see the slower async_req_slow().
+ *
+ * @param phoneid Hash of the phone through which to make the call.
+ * @param method  Method of the call.
+ * @param arg1    Service-defined payload argument.
+ * @param arg2    Service-defined payload argument.
+ * @param arg3    Service-defined payload argument.
+ * @param arg4    Service-defined payload argument.
+ * @param r1      If non-NULL, storage for the 1st reply argument.
+ * @param r2      If non-NULL, storage for the 2nd reply argument.
+ * @param r3      If non-NULL, storage for the 3rd reply argument.
+ * @param r4      If non-NULL, storage for the 4th reply argument.
+ * @param r5      If non-NULL, storage for the 5th reply argument.
+ *
+ * @return Return code of the reply or a negative error code.
+ *
+ */
+sysarg_t async_obsolete_req_fast(int phoneid, sysarg_t method, sysarg_t arg1,
+    sysarg_t arg2, sysarg_t arg3, sysarg_t arg4, sysarg_t *r1, sysarg_t *r2,
+    sysarg_t *r3, sysarg_t *r4, sysarg_t *r5)
+{
+	ipc_call_t result;
+	aid_t eid = async_obsolete_send_4(phoneid, method, arg1, arg2, arg3, arg4,
+	    &result);
+	
+	sysarg_t rc;
+	async_wait_for(eid, &rc);
+	
+	if (r1)
+		*r1 = IPC_GET_ARG1(result);
+	
+	if (r2)
+		*r2 = IPC_GET_ARG2(result);
+	
+	if (r3)
+		*r3 = IPC_GET_ARG3(result);
+	
+	if (r4)
+		*r4 = IPC_GET_ARG4(result);
+	
+	if (r5)
+		*r5 = IPC_GET_ARG5(result);
+	
+	return rc;
+}
+
+/** Wrapper for IPC_M_SHARE_OUT calls using the async framework.
+ *
+ * @param phoneid Phone that will be used to contact the receiving side.
+ * @param src     Source address space area base address.
+ * @param flags   Flags to be used for sharing. Bits can be only cleared.
+ *
+ * @return Zero on success or a negative error code from errno.h.
+ *
+ */
+int async_obsolete_share_out_start(int phoneid, void *src, unsigned int flags)
+{
+	return async_obsolete_req_3_0(phoneid, IPC_M_SHARE_OUT, (sysarg_t) src, 0,
+	    (sysarg_t) flags);
+}
+
+/** Wrapper for ipc_hangup.
+ *
+ * @param phone Phone handle to hung up.
+ *
+ * @return Zero on success or a negative error code.
+ *
+ */
+int async_obsolete_hangup(int phone)
+{
+	return ipc_hangup(phone);
+}
+
+void async_obsolete_serialize_start(void)
+{
+	fibril_inc_sercount();
+}
+
+void async_obsolete_serialize_end(void)
+{
+	fibril_dec_sercount();
+}
+
+/** Wrapper for IPC_M_DATA_WRITE calls using the async framework.
+ *
+ * @param phoneid Phone that will be used to contact the receiving side.
+ * @param src     Address of the beginning of the source buffer.
+ * @param size    Size of the source buffer.
+ * @param flags   Flags to control the data transfer.
+ *
+ * @return Zero on success or a negative error code from errno.h.
+ *
+ */
+int async_obsolete_data_write_start_generic(int phoneid, const void *src, size_t size,
+    int flags)
+{
+	return async_obsolete_req_3_0(phoneid, IPC_M_DATA_WRITE, (sysarg_t) src,
+	    (sysarg_t) size, (sysarg_t) flags);
+}
+
+/** Start IPC_M_DATA_READ using the async framework.
+ *
+ * @param phoneid Phone that will be used to contact the receiving side.
+ * @param dst     Address of the beginning of the destination buffer.
+ * @param size    Size of the destination buffer (in bytes).
+ * @param dataptr Storage of call data (arg 2 holds actual data size).
+ *
+ * @return Hash of the sent message or 0 on error.
+ *
+ */
+aid_t async_obsolete_data_read(int phone, void *dst, size_t size,
+    ipc_call_t *dataptr)
+{
+	return async_obsolete_send_2(phone, IPC_M_DATA_READ, (sysarg_t) dst,
+	    (sysarg_t) size, dataptr);
+}
+
+/** Wrapper for IPC_M_DATA_READ calls using the async framework.
+ *
+ * @param phoneid Phone that will be used to contact the receiving side.
+ * @param dst     Address of the beginning of the destination buffer.
+ * @param size    Size of the destination buffer.
+ * @param flags   Flags to control the data transfer.
+ *
+ * @return Zero on success or a negative error code from errno.h.
+ *
+ */
+int async_obsolete_data_read_start_generic(int phoneid, void *dst, size_t size, int flags)
+{
+	return async_obsolete_req_3_0(phoneid, IPC_M_DATA_READ, (sysarg_t) dst,
+	    (sysarg_t) size, (sysarg_t) flags);
+}
+
+/** Wrapper for making IPC_M_CONNECT_TO_ME calls using the async framework.
+ *
+ * Ask through phone for a new connection to some service.
+ *
+ * @param phone           Phone handle used for contacting the other side.
+ * @param arg1            User defined argument.
+ * @param arg2            User defined argument.
+ * @param arg3            User defined argument.
+ * @param client_receiver Connection handing routine.
+ *
+ * @return New phone handle on success or a negative error code.
+ *
+ */
+int async_obsolete_connect_to_me(int phone, sysarg_t arg1, sysarg_t arg2,
+    sysarg_t arg3, async_client_conn_t client_receiver)
+{
+	sysarg_t task_hash;
+	sysarg_t phone_hash;
+	int rc = async_obsolete_req_3_5(phone, IPC_M_CONNECT_TO_ME, arg1, arg2, arg3,
+	    NULL, NULL, NULL, &task_hash, &phone_hash);
+	if (rc != EOK)
+		return rc;
+	
+	if (client_receiver != NULL)
+		async_new_connection(task_hash, phone_hash, 0, NULL,
+		    client_receiver);
+	
+	return EOK;
+}
+
+/** Wrapper for making IPC_M_CONNECT_ME_TO calls using the async framework.
+ *
+ * Ask through phone for a new connection to some service.
+ *
+ * @param phone Phone handle used for contacting the other side.
+ * @param arg1  User defined argument.
+ * @param arg2  User defined argument.
+ * @param arg3  User defined argument.
+ *
+ * @return New phone handle on success or a negative error code.
+ *
+ */
+int async_obsolete_connect_me_to(int phone, sysarg_t arg1, sysarg_t arg2,
+    sysarg_t arg3)
+{
+	sysarg_t newphid;
+	int rc = async_obsolete_req_3_5(phone, IPC_M_CONNECT_ME_TO, arg1, arg2, arg3,
+	    NULL, NULL, NULL, NULL, &newphid);
+	
+	if (rc != EOK)
+		return rc;
+	
+	return newphid;
+}
+
+/** Wrapper for making IPC_M_CONNECT_ME_TO calls using the async framework.
+ *
+ * Ask through phone for a new connection to some service and block until
+ * success.
+ *
+ * @param phoneid Phone handle used for contacting the other side.
+ * @param arg1    User defined argument.
+ * @param arg2    User defined argument.
+ * @param arg3    User defined argument.
+ *
+ * @return New phone handle on success or a negative error code.
+ *
+ */
+int async_obsolete_connect_me_to_blocking(int phoneid, sysarg_t arg1, sysarg_t arg2,
+    sysarg_t arg3)
+{
+	sysarg_t newphid;
+	int rc = async_obsolete_req_4_5(phoneid, IPC_M_CONNECT_ME_TO, arg1, arg2, arg3,
+	    IPC_FLAG_BLOCKING, NULL, NULL, NULL, NULL, &newphid);
+	
+	if (rc != EOK)
+		return rc;
+	
+	return newphid;
+}
+
+/** Send message and return id of the sent message
+ *
+ * The return value can be used as input for async_wait() to wait for
+ * completion.
+ *
+ * @param phoneid Handle of the phone that will be used for the send.
+ * @param method  Service-defined method.
+ * @param arg1    Service-defined payload argument.
+ * @param arg2    Service-defined payload argument.
+ * @param arg3    Service-defined payload argument.
+ * @param arg4    Service-defined payload argument.
+ * @param arg5    Service-defined payload argument.
+ * @param dataptr If non-NULL, storage where the reply data will be
+ *                stored.
+ *
+ * @return Hash of the sent message or 0 on error.
+ *
+ */
+aid_t async_obsolete_send_slow(int phoneid, sysarg_t method, sysarg_t arg1,
+    sysarg_t arg2, sysarg_t arg3, sysarg_t arg4, sysarg_t arg5,
+    ipc_call_t *dataptr)
+{
+	amsg_t *msg = malloc(sizeof(amsg_t));
+	
+	if (!msg)
+		return 0;
+	
+	msg->done = false;
+	msg->dataptr = dataptr;
+	
+	msg->wdata.to_event.inlist = false;
+	
+	/*
+	 * We may sleep in the next method,
+	 * but it will use its own means
+	 */
+	msg->wdata.active = true;
+	
+	ipc_call_async_5(phoneid, method, arg1, arg2, arg3, arg4, arg5, msg,
+	    reply_received, true);
+	
+	return (aid_t) msg;
+}
+
+void async_obsolete_msg_0(int phone, sysarg_t imethod)
+{
+	ipc_call_async_0(phone, imethod, NULL, NULL, true);
+}
+
+void async_obsolete_msg_1(int phone, sysarg_t imethod, sysarg_t arg1)
+{
+	ipc_call_async_1(phone, imethod, arg1, NULL, NULL, true);
+}
+
+void async_obsolete_msg_2(int phone, sysarg_t imethod, sysarg_t arg1, sysarg_t arg2)
+{
+	ipc_call_async_2(phone, imethod, arg1, arg2, NULL, NULL, true);
+}
+
+void async_obsolete_msg_3(int phone, sysarg_t imethod, sysarg_t arg1, sysarg_t arg2,
+    sysarg_t arg3)
+{
+	ipc_call_async_3(phone, imethod, arg1, arg2, arg3, NULL, NULL, true);
+}
+
+void async_obsolete_msg_4(int phone, sysarg_t imethod, sysarg_t arg1, sysarg_t arg2,
+    sysarg_t arg3, sysarg_t arg4)
+{
+	ipc_call_async_4(phone, imethod, arg1, arg2, arg3, arg4, NULL, NULL,
+	    true);
+}
+
+void async_obsolete_msg_5(int phone, sysarg_t imethod, sysarg_t arg1, sysarg_t arg2,
+    sysarg_t arg3, sysarg_t arg4, sysarg_t arg5)
+{
+	ipc_call_async_5(phone, imethod, arg1, arg2, arg3, arg4, arg5, NULL,
+	    NULL, true);
+}
+
+/** Wrapper for IPC_M_SHARE_IN calls using the async framework.
+ *
+ * @param phoneid Phone that will be used to contact the receiving side.
+ * @param dst     Destination address space area base.
+ * @param size    Size of the destination address space area.
+ * @param arg     User defined argument.
+ * @param flags   Storage for the received flags. Can be NULL.
+ *
+ * @return Zero on success or a negative error code from errno.h.
+ *
+ */
+int async_obsolete_share_in_start(int phoneid, void *dst, size_t size, sysarg_t arg,
+    unsigned int *flags)
+{
+	sysarg_t tmp_flags;
+	int res = async_obsolete_req_3_2(phoneid, IPC_M_SHARE_IN, (sysarg_t) dst,
+	    (sysarg_t) size, arg, NULL, &tmp_flags);
+	
+	if (flags)
+		*flags = (unsigned int) tmp_flags;
+	
+	return res;
+}
+
+int async_obsolete_forward_fast(ipc_callid_t callid, int phoneid, sysarg_t imethod,
+    sysarg_t arg1, sysarg_t arg2, unsigned int mode)
+{
+	return ipc_forward_fast(callid, phoneid, imethod, arg1, arg2, mode);
+}
+
+int async_obsolete_forward_slow(ipc_callid_t callid, int phoneid, sysarg_t imethod,
+    sysarg_t arg1, sysarg_t arg2, sysarg_t arg3, sysarg_t arg4, sysarg_t arg5,
+    unsigned int mode)
+{
+	return ipc_forward_slow(callid, phoneid, imethod, arg1, arg2, arg3, arg4,
+	    arg5, mode);
+}
+
+/** Wrapper for forwarding any data that is about to be received
+ *
+ */
+int async_obsolete_data_write_forward_fast(int phoneid, sysarg_t method, sysarg_t arg1,
+    sysarg_t arg2, sysarg_t arg3, sysarg_t arg4, ipc_call_t *dataptr)
+{
+	ipc_callid_t callid;
+	if (!async_data_write_receive(&callid, NULL)) {
+		ipc_answer_0(callid, EINVAL);
+		return EINVAL;
+	}
+	
+	aid_t msg = async_obsolete_send_fast(phoneid, method, arg1, arg2, arg3, arg4,
+	    dataptr);
+	if (msg == 0) {
+		ipc_answer_0(callid, EINVAL);
+		return EINVAL;
+	}
+	
+	int retval = ipc_forward_fast(callid, phoneid, 0, 0, 0,
+	    IPC_FF_ROUTE_FROM_ME);
+	if (retval != EOK) {
+		async_wait_for(msg, NULL);
+		ipc_answer_0(callid, retval);
+		return retval;
+	}
+	
+	sysarg_t rc;
+	async_wait_for(msg, &rc);
+	
+	return (int) rc;
+}
+
+/** @}
+ */
Index: uspace/lib/c/generic/async_sess.c
===================================================================
--- uspace/lib/c/generic/async_sess.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ 	(revision )
@@ -1,309 +1,0 @@
-/*
- * Copyright (c) 2010 Jakub Jermar
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * - Redistributions of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * - Redistributions in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * - The name of the author may not be used to endorse or promote products
- *   derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/** @addtogroup libc
- * @{
- */
-/** @file
- */
-
-/**
- * This file implements simple session support for the async framework.
- *
- * By the term 'session', we mean a logical data path between a client and a
- * server over which the client can perform multiple concurrent exchanges.
- * Each exchange consists of one or more requests (IPC calls) which can
- * be potentially blocking.
- *
- * Clients and servers are naturally connected using IPC phones, thus an IPC
- * phone represents a session between a client and a server. In one
- * session, there can be many outstanding exchanges. In the current
- * implementation each concurrent exchanges takes place over a different
- * connection (there can be at most one active exchage per connection).
- *
- * Sessions make it useful for a client or client API to support concurrent
- * requests, independent of the actual implementation. Sessions provide
- * an abstract interface to concurrent IPC communication. This is especially
- * useful for client API stubs that aim to be reentrant (i.e. that allow
- * themselves to be called from different fibrils and threads concurrently).
- *
- * There are several possible implementations of sessions. This implementation
- * uses additional phones to represent sessions. Using phones both for the
- * session and also for its exchages/connections has several advantages:
- *
- * - to make a series of exchanges over a session, the client can continue to
- *   use the existing async framework APIs
- * - the server supports sessions by the virtue of spawning a new connection
- *   fibril, just as it does for every new connection even without sessions
- * - the implementation is pretty straightforward; a very naive implementation
- *   would be to make each exchage using a fresh phone (that is what we
- *   have done in the past); a slightly better approach would be to cache
- *   connections so that they can be reused by a later exchange within
- *   the same session (that is what this implementation does)
- *
- * The main disadvantages of using phones to represent sessions are:
- *
- * - if there are too many exchanges (even cached ones), the task may hit its
- *   limit on the maximum number of connected phones, which could prevent the
- *   task from making new IPC connections to other tasks
- * - if there are too many IPC connections already, it may be impossible to
- *   create an exchange by connecting a new phone thanks to the task's limit on
- *   the maximum number of connected phones
- *
- * These problems can be alleviated by increasing the limit on the maximum
- * number of connected phones to some reasonable value and by limiting the number
- * of cached connections to some fraction of this limit.
- *
- * The cache itself has a mechanism to close some number of unused phones if a
- * new phone cannot be connected, but the outer world currently does not have a
- * way to ask the phone cache to shrink.
- *
- * To minimize the confusion stemming from the fact that we use phones for two
- * things (the session itself and also one for each data connection), this file
- * makes the distinction by using the term 'session phone' for the former and
- * 'data phone' for the latter. Under the hood, all phones remain equal,
- * of course.
- *
- * There is a small inefficiency in that the cache repeatedly allocates and
- * deallocates the conn_node_t structures when in fact it could keep the
- * allocated structures around and reuse them later. But such a solution would
- * be effectively implementing a poor man's slab allocator while it would be
- * better to have the slab allocator ported to uspace so that everyone could
- * benefit from it.
- */
-
-#include <async_sess.h>
-#include <fibril_synch.h>
-#include <adt/list.h>
-#include <adt/hash_table.h>
-#include <malloc.h>
-#include <errno.h>
-#include <assert.h>
-#include <async.h>
-#include "private/async_sess.h"
-
-/** An inactive open connection. */
-typedef struct {
-	link_t sess_link;	/**< Link for the session list of inactive connections. */
-	link_t global_link;	/**< Link for the global list of inactive connections. */
-	int data_phone;		/**< Connected data phone. */
-} conn_node_t;
-
-/**
- * Mutex protecting the inactive_conn_head list, the session list and the
- * avail_phone condition variable.
- */
-static fibril_mutex_t async_sess_mutex;
-
-/**
- * List of all currently inactive connections.
- */
-static LIST_INITIALIZE(inactive_conn_head);
-
-/**
- * List of all open sessions.
- */
-static LIST_INITIALIZE(session_list_head);
-
-/**
- * Condition variable used to wait for a phone to become available.
- */
-static FIBRIL_CONDVAR_INITIALIZE(avail_phone_cv);
-
-/** Initialize the async_sess subsystem.
- *
- * Needs to be called prior to any other interface in this file.
- *
- */
-void __async_sess_init(void)
-{
-	fibril_mutex_initialize(&async_sess_mutex);
-	list_initialize(&inactive_conn_head);
-	list_initialize(&session_list_head);
-}
-
-/** Create a session.
- *
- * Session is a logical datapath from a client task to a server task.
- * One session can accomodate multiple concurrent exchanges. Here
- * @a phone is a phone connected to the desired server task.
- *
- * This function always succeeds.
- *
- * @param sess	Session structure provided by caller, will be filled in.
- * @param phone	Phone connected to the desired server task.
- * @param arg1	Value to pass as first argument upon creating a new
- *		connection. Typical use is to identify a resource within
- *		the server that the caller wants to access (port ID,
- *		interface ID, device ID, etc.).
- */
-void async_session_create(async_sess_t *sess, int phone, sysarg_t arg1)
-{
-	sess->sess_phone = phone;
-	sess->connect_arg1 = arg1;
-	list_initialize(&sess->conn_head);
-	
-	/* Add to list of sessions. */
-	fibril_mutex_lock(&async_sess_mutex);
-	list_append(&sess->sess_link, &session_list_head);
-	fibril_mutex_unlock(&async_sess_mutex);
-}
-
-/** Destroy a session.
- *
- * Dismantle session structure @a sess and release any resources (connections)
- * held by the session.
- *
- * @param sess	Session to destroy.
- */
-void async_session_destroy(async_sess_t *sess)
-{
-	conn_node_t *conn;
-
-	/* Remove from list of sessions. */
-	fibril_mutex_lock(&async_sess_mutex);
-	list_remove(&sess->sess_link);
-	fibril_mutex_unlock(&async_sess_mutex);
-
-	/* We did not connect the phone so we do not hang it up either. */
-	sess->sess_phone = -1;
-
-	/* Tear down all data connections. */
-	while (!list_empty(&sess->conn_head)) {
-		conn = list_get_instance(sess->conn_head.next, conn_node_t,
-		    sess_link);
-
-		list_remove(&conn->sess_link);
-		list_remove(&conn->global_link);
-		
-		async_hangup(conn->data_phone);
-		free(conn);
-	}
-	
-	fibril_condvar_broadcast(&avail_phone_cv);
-}
-
-static void conn_node_initialize(conn_node_t *conn)
-{
-	link_initialize(&conn->sess_link);
-	link_initialize(&conn->global_link);
-	conn->data_phone = -1;
-}
-
-/** Start new exchange in a session.
- *
- * @param sess_phone	Session.
- * @return		Phone representing the new exchange or a negative error
- *			code.
- */
-int async_exchange_begin(async_sess_t *sess)
-{
-	conn_node_t *conn;
-	int data_phone;
-
-	fibril_mutex_lock(&async_sess_mutex);
-
-	if (!list_empty(&sess->conn_head)) {
-		/*
-		 * There are inactive connections in the session.
-		 */
-		conn = list_get_instance(sess->conn_head.next, conn_node_t,
-		    sess_link);
-		list_remove(&conn->sess_link);
-		list_remove(&conn->global_link);
-		
-		data_phone = conn->data_phone;
-		free(conn);
-	} else {
-		/*
-		 * There are no available connections in the session.
-		 * Make a one-time attempt to connect a new data phone.
-		 */
-retry:
-		data_phone = async_connect_me_to(sess->sess_phone,
-		    sess->connect_arg1, 0, 0);
-		if (data_phone >= 0) {
-			/* success, do nothing */
-		} else if (!list_empty(&inactive_conn_head)) {
-			/*
-			 * We did not manage to connect a new phone. But we can
-			 * try to close some of the currently inactive
-			 * connections in other sessions and try again.
-			 */
-			conn = list_get_instance(inactive_conn_head.next,
-			    conn_node_t, global_link);
-			list_remove(&conn->global_link);
-			list_remove(&conn->sess_link);
-			data_phone = conn->data_phone;
-			free(conn);
-			async_hangup(data_phone);
-			goto retry;
-		} else {
-			/*
-			 * Wait for a phone to become available.
-			 */
-			fibril_condvar_wait(&avail_phone_cv, &async_sess_mutex);
-			goto retry;
-		}
-	}
-
-	fibril_mutex_unlock(&async_sess_mutex);
-	return data_phone;
-}
-
-/** Finish an exchange.
- *
- * @param sess		Session.
- * @param data_phone	Phone representing the exchange within the session.
- */
-void async_exchange_end(async_sess_t *sess, int data_phone)
-{
-	conn_node_t *conn;
-
-	fibril_mutex_lock(&async_sess_mutex);
-	fibril_condvar_signal(&avail_phone_cv);
-	conn = (conn_node_t *) malloc(sizeof(conn_node_t));
-	if (!conn) {
-		/*
-		 * Being unable to remember the connected data phone here
-		 * means that we simply hang up.
-		 */
-		async_hangup(data_phone);
-		fibril_mutex_unlock(&async_sess_mutex);
-		return;
-	}
-
-	conn_node_initialize(conn);
-	conn->data_phone = data_phone;
-	list_append(&conn->sess_link, &sess->conn_head);
-	list_append(&conn->global_link, &inactive_conn_head);
-	fibril_mutex_unlock(&async_sess_mutex);
-}
-
-/** @}
- */
Index: uspace/lib/c/generic/clipboard.c
===================================================================
--- uspace/lib/c/generic/clipboard.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/clipboard.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -39,7 +39,8 @@
 
 #include <clipboard.h>
-#include <ipc/ns.h>
+#include <ns.h>
 #include <ipc/services.h>
 #include <ipc/clipboard.h>
+#include <fibril_synch.h>
 #include <async.h>
 #include <str.h>
@@ -47,13 +48,33 @@
 #include <malloc.h>
 
-static int clip_phone = -1;
-
-/** Connect to clipboard server
- *
- */
-static void clip_connect(void)
-{
-	while (clip_phone < 0)
-		clip_phone = service_connect_blocking(SERVICE_CLIPBOARD, 0, 0);
+static FIBRIL_MUTEX_INITIALIZE(clip_mutex);
+static async_sess_t *clip_sess = NULL;
+
+/** Start an async exchange on the clipboard session.
+ *
+ * @return New exchange.
+ *
+ */
+static async_exch_t *clip_exchange_begin(void)
+{
+	fibril_mutex_lock(&clip_mutex);
+	
+	while (clip_sess == NULL)
+		clip_sess = service_connect_blocking(EXCHANGE_SERIALIZE,
+		    SERVICE_CLIPBOARD, 0, 0);
+	
+	fibril_mutex_unlock(&clip_mutex);
+	
+	return async_exchange_begin(clip_sess);
+}
+
+/** Finish an async exchange on the clipboard session.
+ *
+ * @param exch Exchange to be finished.
+ *
+ */
+static void clip_exchange_end(async_exch_t *exch)
+{
+	async_exchange_end(exch);
 }
 
@@ -73,22 +94,20 @@
 	
 	if (size == 0) {
-		async_serialize_start();
-		clip_connect();
-		
-		sysarg_t rc = async_req_1_0(clip_phone, CLIPBOARD_PUT_DATA, CLIPBOARD_TAG_NONE);
-		
-		async_serialize_end();
+		async_exch_t *exch = clip_exchange_begin();
+		sysarg_t rc = async_req_1_0(exch, CLIPBOARD_PUT_DATA,
+		    CLIPBOARD_TAG_NONE);
+		clip_exchange_end(exch);
 		
 		return (int) rc;
 	} else {
-		async_serialize_start();
-		clip_connect();
-		
-		aid_t req = async_send_1(clip_phone, CLIPBOARD_PUT_DATA, CLIPBOARD_TAG_DATA, NULL);
-		sysarg_t rc = async_data_write_start(clip_phone, (void *) str, size);
+		async_exch_t *exch = clip_exchange_begin();
+		aid_t req = async_send_1(exch, CLIPBOARD_PUT_DATA, CLIPBOARD_TAG_DATA,
+		    NULL);
+		sysarg_t rc = async_data_write_start(exch, (void *) str, size);
+		clip_exchange_end(exch);
+		
 		if (rc != EOK) {
 			sysarg_t rc_orig;
 			async_wait_for(req, &rc_orig);
-			async_serialize_end();
 			if (rc_orig == EOK)
 				return (int) rc;
@@ -98,5 +117,4 @@
 		
 		async_wait_for(req, &rc);
-		async_serialize_end();
 		
 		return (int) rc;
@@ -117,12 +135,11 @@
 	/* Loop until clipboard read succesful */
 	while (true) {
-		async_serialize_start();
-		clip_connect();
+		async_exch_t *exch = clip_exchange_begin();
 		
 		sysarg_t size;
 		sysarg_t tag;
-		sysarg_t rc = async_req_0_2(clip_phone, CLIPBOARD_CONTENT, &size, &tag);
-		
-		async_serialize_end();
+		sysarg_t rc = async_req_0_2(exch, CLIPBOARD_CONTENT, &size, &tag);
+		
+		clip_exchange_end(exch);
 		
 		if (rc != EOK)
@@ -145,8 +162,9 @@
 				return ENOMEM;
 			
-			async_serialize_start();
-			
-			aid_t req = async_send_1(clip_phone, CLIPBOARD_GET_DATA, tag, NULL);
-			rc = async_data_read_start(clip_phone, (void *) sbuf, size);
+			exch = clip_exchange_begin();
+			aid_t req = async_send_1(exch, CLIPBOARD_GET_DATA, tag, NULL);
+			rc = async_data_read_start(exch, (void *) sbuf, size);
+			clip_exchange_end(exch);
+			
 			if ((int) rc == EOVERFLOW) {
 				/*
@@ -154,5 +172,4 @@
 				 * the last call of CLIPBOARD_CONTENT
 				 */
-				async_serialize_end();
 				break;
 			}
@@ -161,5 +178,4 @@
 				sysarg_t rc_orig;
 				async_wait_for(req, &rc_orig);
-				async_serialize_end();
 				if (rc_orig == EOK)
 					return (int) rc;
@@ -169,5 +185,4 @@
 			
 			async_wait_for(req, &rc);
-			async_serialize_end();
 			
 			if (rc == EOK) {
Index: uspace/lib/c/generic/device/char_dev.c
===================================================================
--- uspace/lib/c/generic/device/char_dev.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/device/char_dev.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -45,35 +45,37 @@
  * using its character interface.
  *
- * @param dev_phone	Phone to the device.
- * @param buf		Buffer for the data read from or written to the device.
- * @param size		Maximum size of data (in bytes) to be read or written.
- * @param read		Read from the device if true, write to it otherwise.
+ * @param sess Session to the device.
+ * @param buf  Buffer for the data read from or written to the device.
+ * @param size Maximum size of data (in bytes) to be read or written.
+ * @param read Read from the device if true, write to it otherwise.
  *
- * @return		Non-negative number of bytes actually read from or
- *			written to the device on success, negative error number
- *			otherwise.
+ * @return Non-negative number of bytes actually read from or
+ *         written to the device on success, negative error number
+ *         otherwise.
+ *
  */
-static ssize_t char_dev_rw(int dev_phone, void *buf, size_t size, bool read)
+static ssize_t char_dev_rw(async_sess_t *sess, void *buf, size_t size, bool read)
 {
-	async_serialize_start();
-	
 	ipc_call_t answer;
 	aid_t req;
 	int ret;
 	
+	async_exch_t *exch = async_exchange_begin(sess);
+	
 	if (read) {
-		req = async_send_1(dev_phone, DEV_IFACE_ID(CHAR_DEV_IFACE),
+		req = async_send_1(exch, DEV_IFACE_ID(CHAR_DEV_IFACE),
 		    CHAR_DEV_READ, &answer);
-		ret = async_data_read_start(dev_phone, buf, size);
+		ret = async_data_read_start(exch, buf, size);
 	} else {
-		req = async_send_1(dev_phone, DEV_IFACE_ID(CHAR_DEV_IFACE),
+		req = async_send_1(exch, DEV_IFACE_ID(CHAR_DEV_IFACE),
 		    CHAR_DEV_WRITE, &answer);
-		ret = async_data_write_start(dev_phone, buf, size);
+		ret = async_data_write_start(exch, buf, size);
 	}
+	
+	async_exchange_end(exch);
 	
 	sysarg_t rc;
 	if (ret != EOK) {
 		async_wait_for(req, &rc);
-		async_serialize_end();
 		if (rc == EOK)
 			return (ssize_t) ret;
@@ -83,5 +85,4 @@
 	
 	async_wait_for(req, &rc);
-	async_serialize_end();
 	
 	ret = (int) rc;
@@ -94,29 +95,31 @@
 /** Read from character device.
  *
- * @param dev_phone	Phone to the device.
- * @param buf		Output buffer for the data read from the device.
- * @param size		Maximum size (in bytes) of the data to be read.
+ * @param sess Session to the device.
+ * @param buf  Output buffer for the data read from the device.
+ * @param size Maximum size (in bytes) of the data to be read.
  *
- * @return		Non-negative number of bytes actually read from the
- *			device on success, negative error number otherwise.
+ * @return Non-negative number of bytes actually read from the
+ *         device on success, negative error number otherwise.
+ *
  */
-ssize_t char_dev_read(int dev_phone, void *buf, size_t size)
+ssize_t char_dev_read(async_sess_t *sess, void *buf, size_t size)
 {
-	return char_dev_rw(dev_phone, buf, size, true);
+	return char_dev_rw(sess, buf, size, true);
 }
 
 /** Write to character device.
  *
- * @param dev_phone	Phone to the device.
- * @param buf		Input buffer containg the data to be written to the
- *			device.
- * @param size		Maximum size (in bytes) of the data to be written.
+ * @param sess Session to the device.
+ * @param buf  Input buffer containg the data to be written to the
+ *             device.
+ * @param size Maximum size (in bytes) of the data to be written.
  *
- * @return		Non-negative number of bytes actually written to the
- *			device on success, negative error number otherwise.
+ * @return Non-negative number of bytes actually written to the
+ *         device on success, negative error number otherwise.
+ *
  */
-ssize_t char_dev_write(int dev_phone, void *buf, size_t size)
+ssize_t char_dev_write(async_sess_t *sess, void *buf, size_t size)
 {
-	return char_dev_rw(dev_phone, buf, size, false);
+	return char_dev_rw(sess, buf, size, false);
 }
 
Index: uspace/lib/c/generic/device/hw_res.c
===================================================================
--- uspace/lib/c/generic/device/hw_res.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/device/hw_res.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -38,36 +38,48 @@
 #include <malloc.h>
 
-int hw_res_get_resource_list(int dev_phone, hw_resource_list_t *hw_resources)
+int hw_res_get_resource_list(async_sess_t *sess,
+    hw_resource_list_t *hw_resources)
 {
 	sysarg_t count = 0;
-
-	int rc = async_req_1_1(dev_phone, DEV_IFACE_ID(HW_RES_DEV_IFACE),
+	
+	async_exch_t *exch = async_exchange_begin(sess);
+	int rc = async_req_1_1(exch, DEV_IFACE_ID(HW_RES_DEV_IFACE),
 	    HW_RES_GET_RESOURCE_LIST, &count);
-
-	hw_resources->count = count;
-	if (rc != EOK)
+	
+	if (rc != EOK) {
+		async_exchange_end(exch);
 		return rc;
+	}
 	
 	size_t size = count * sizeof(hw_resource_t);
-	hw_resources->resources = (hw_resource_t *)malloc(size);
-	if (!hw_resources->resources)
+	hw_resource_t *resources = (hw_resource_t *) malloc(size);
+	if (resources == NULL) {
+		// FIXME: This is protocol violation
+		async_exchange_end(exch);
 		return ENOMEM;
+	}
 	
-	rc = async_data_read_start(dev_phone, hw_resources->resources, size);
+	rc = async_data_read_start(exch, resources, size);
+	async_exchange_end(exch);
+	
 	if (rc != EOK) {
-		free(hw_resources->resources);
-		hw_resources->resources = NULL;
+		free(resources);
 		return rc;
 	}
+	
+	hw_resources->resources = resources;
+	hw_resources->count = count;
 	
 	return EOK;
 }
 
-bool hw_res_enable_interrupt(int dev_phone)
+bool hw_res_enable_interrupt(async_sess_t *sess)
 {
-	int rc = async_req_1_0(dev_phone, DEV_IFACE_ID(HW_RES_DEV_IFACE),
+	async_exch_t *exch = async_exchange_begin(sess);
+	int rc = async_req_1_0(exch, DEV_IFACE_ID(HW_RES_DEV_IFACE),
 	    HW_RES_ENABLE_INTERRUPT);
-
-	return rc == EOK;
+	async_exchange_end(exch);
+	
+	return (rc == EOK);
 }
 
Index: uspace/lib/c/generic/devman.c
===================================================================
--- uspace/lib/c/generic/devman.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/devman.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -36,59 +36,141 @@
 
 #include <str.h>
-#include <stdio.h>
 #include <ipc/services.h>
+#include <ns.h>
 #include <ipc/devman.h>
 #include <devman.h>
+#include <fibril_synch.h>
 #include <async.h>
-#include <fibril_synch.h>
 #include <errno.h>
 #include <malloc.h>
 #include <bool.h>
-#include <adt/list.h>
-
-static int devman_phone_driver = -1;
-static int devman_phone_client = -1;
-
-static FIBRIL_MUTEX_INITIALIZE(devman_phone_mutex);
-
-int devman_get_phone(devman_interface_t iface, unsigned int flags)
+
+static FIBRIL_MUTEX_INITIALIZE(devman_driver_block_mutex);
+static FIBRIL_MUTEX_INITIALIZE(devman_client_block_mutex);
+
+static FIBRIL_MUTEX_INITIALIZE(devman_driver_mutex);
+static FIBRIL_MUTEX_INITIALIZE(devman_client_mutex);
+
+static async_sess_t *devman_driver_block_sess = NULL;
+static async_sess_t *devman_client_block_sess = NULL;
+
+static async_sess_t *devman_driver_sess = NULL;
+static async_sess_t *devman_client_sess = NULL;
+
+static void clone_session(fibril_mutex_t *mtx, async_sess_t *src,
+    async_sess_t **dst)
+{
+	fibril_mutex_lock(mtx);
+	
+	if ((*dst == NULL) && (src != NULL))
+		*dst = src;
+	
+	fibril_mutex_unlock(mtx);
+}
+
+/** Start an async exchange on the devman session (blocking).
+ *
+ * @param iface Device manager interface to choose
+ *
+ * @return New exchange.
+ *
+ */
+async_exch_t *devman_exchange_begin_blocking(devman_interface_t iface)
 {
 	switch (iface) {
 	case DEVMAN_DRIVER:
-		fibril_mutex_lock(&devman_phone_mutex);
-		if (devman_phone_driver >= 0) {
-			fibril_mutex_unlock(&devman_phone_mutex);
-			return devman_phone_driver;
+		fibril_mutex_lock(&devman_driver_block_mutex);
+		
+		while (devman_driver_block_sess == NULL) {
+			clone_session(&devman_driver_mutex, devman_driver_sess,
+			    &devman_driver_block_sess);
+			
+			if (devman_driver_block_sess == NULL)
+				devman_driver_block_sess =
+				    service_connect_blocking(EXCHANGE_SERIALIZE,
+				    SERVICE_DEVMAN, DEVMAN_DRIVER, 0);
 		}
 		
-		if (flags & IPC_FLAG_BLOCKING)
-			devman_phone_driver = async_connect_me_to_blocking(
-			    PHONE_NS, SERVICE_DEVMAN, DEVMAN_DRIVER, 0);
-		else
-			devman_phone_driver = async_connect_me_to(PHONE_NS,
-			    SERVICE_DEVMAN, DEVMAN_DRIVER, 0);
-		
-		fibril_mutex_unlock(&devman_phone_mutex);
-		return devman_phone_driver;
+		fibril_mutex_unlock(&devman_driver_block_mutex);
+		
+		clone_session(&devman_driver_mutex, devman_driver_block_sess,
+		    &devman_driver_sess);
+		
+		return async_exchange_begin(devman_driver_block_sess);
 	case DEVMAN_CLIENT:
-		fibril_mutex_lock(&devman_phone_mutex);
-		if (devman_phone_client >= 0) {
-			fibril_mutex_unlock(&devman_phone_mutex);
-			return devman_phone_client;
+		fibril_mutex_lock(&devman_client_block_mutex);
+		
+		while (devman_client_block_sess == NULL) {
+			clone_session(&devman_client_mutex, devman_client_sess,
+			    &devman_client_block_sess);
+			
+			if (devman_client_block_sess == NULL)
+				devman_client_block_sess =
+				    service_connect_blocking(EXCHANGE_SERIALIZE,
+				    SERVICE_DEVMAN, DEVMAN_CLIENT, 0);
 		}
 		
-		if (flags & IPC_FLAG_BLOCKING) {
-			devman_phone_client = async_connect_me_to_blocking(
-			    PHONE_NS, SERVICE_DEVMAN, DEVMAN_CLIENT, 0);
-		} else {
-			devman_phone_client = async_connect_me_to(PHONE_NS,
-			    SERVICE_DEVMAN, DEVMAN_CLIENT, 0);
-		}
-		
-		fibril_mutex_unlock(&devman_phone_mutex);
-		return devman_phone_client;
+		fibril_mutex_unlock(&devman_client_block_mutex);
+		
+		clone_session(&devman_client_mutex, devman_client_block_sess,
+		    &devman_client_sess);
+		
+		return async_exchange_begin(devman_client_block_sess);
 	default:
-		return -1;
-	}
+		return NULL;
+	}
+}
+
+/** Start an async exchange on the devman session.
+ *
+ * @param iface Device manager interface to choose
+ *
+ * @return New exchange.
+ *
+ */
+async_exch_t *devman_exchange_begin(devman_interface_t iface)
+{
+	switch (iface) {
+	case DEVMAN_DRIVER:
+		fibril_mutex_lock(&devman_driver_mutex);
+		
+		if (devman_driver_sess == NULL)
+			devman_driver_sess =
+			    service_connect(EXCHANGE_SERIALIZE, SERVICE_DEVMAN,
+			    DEVMAN_DRIVER, 0);
+		
+		fibril_mutex_unlock(&devman_driver_mutex);
+		
+		if (devman_driver_sess == NULL)
+			return NULL;
+		
+		return async_exchange_begin(devman_driver_sess);
+	case DEVMAN_CLIENT:
+		fibril_mutex_lock(&devman_client_mutex);
+		
+		if (devman_client_sess == NULL)
+			devman_client_sess =
+			    service_connect(EXCHANGE_SERIALIZE, SERVICE_DEVMAN,
+			    DEVMAN_CLIENT, 0);
+		
+		fibril_mutex_unlock(&devman_client_mutex);
+		
+		if (devman_client_sess == NULL)
+			return NULL;
+		
+		return async_exchange_begin(devman_client_sess);
+	default:
+		return NULL;
+	}
+}
+
+/** Finish an async exchange on the devman session.
+ *
+ * @param exch Exchange to be finished.
+ *
+ */
+void devman_exchange_end(async_exch_t *exch)
+{
+	async_exchange_end(exch);
 }
 
@@ -96,120 +178,98 @@
 int devman_driver_register(const char *name, async_client_conn_t conn)
 {
-	int phone = devman_get_phone(DEVMAN_DRIVER, IPC_FLAG_BLOCKING);
-	
-	if (phone < 0)
-		return phone;
-	
-	async_serialize_start();
-	
-	ipc_call_t answer;
-	aid_t req = async_send_2(phone, DEVMAN_DRIVER_REGISTER, 0, 0, &answer);
-	
-	sysarg_t retval = async_data_write_start(phone, name, str_size(name));
-	if (retval != EOK) {
-		async_wait_for(req, NULL);
-		async_serialize_end();
-		return -1;
+	async_exch_t *exch = devman_exchange_begin_blocking(DEVMAN_DRIVER);
+	
+	ipc_call_t answer;
+	aid_t req = async_send_2(exch, DEVMAN_DRIVER_REGISTER, 0, 0, &answer);
+	sysarg_t retval = async_data_write_start(exch, name, str_size(name));
+	
+	devman_exchange_end(exch);
+	
+	if (retval != EOK) {
+		async_wait_for(req, NULL);
+		return retval;
 	}
 	
 	async_set_client_connection(conn);
 	
-	async_connect_to_me(phone, 0, 0, 0, NULL);
+	exch = devman_exchange_begin(DEVMAN_DRIVER);
+	async_connect_to_me(exch, 0, 0, 0, NULL);
+	devman_exchange_end(exch);
+	
 	async_wait_for(req, &retval);
-	
-	async_serialize_end();
-	
 	return retval;
 }
 
-static int devman_send_match_id(int phone, match_id_t *match_id)
-{
-	ipc_call_t answer;
-
-	aid_t req = async_send_1(phone, DEVMAN_ADD_MATCH_ID, match_id->score,
-	    &answer);
-	int retval = async_data_write_start(phone, match_id->id,
-	    str_size(match_id->id));
-
-	async_wait_for(req, NULL);
-	return retval;
-}
-
-
-static int devman_send_match_ids(int phone, match_id_list_t *match_ids)
-{
+/** Add function to a device.
+ *
+ * Request devman to add a new function to the specified device owned by
+ * this driver task.
+ *
+ * @param name      Name of the new function
+ * @param ftype     Function type, fun_inner or fun_exposed
+ * @param match_ids Match IDs (should be empty for fun_exposed)
+ * @param devh      Devman handle of the device
+ * @param funh      Place to store handle of the new function
+ *
+ * @return EOK on success or negative error code.
+ *
+ */
+int devman_add_function(const char *name, fun_type_t ftype,
+    match_id_list_t *match_ids, devman_handle_t devh, devman_handle_t *funh)
+{
+	int match_count = list_count(&match_ids->ids);
+	async_exch_t *exch = devman_exchange_begin_blocking(DEVMAN_DRIVER);
+	
+	ipc_call_t answer;
+	aid_t req = async_send_3(exch, DEVMAN_ADD_FUNCTION, (sysarg_t) ftype,
+	    devh, match_count, &answer);
+	sysarg_t retval = async_data_write_start(exch, name, str_size(name));
+	if (retval != EOK) {
+		devman_exchange_end(exch);
+		async_wait_for(req, NULL);
+		return retval;
+	}
+	
+	async_wait_for(req, &retval);
+	if (retval != EOK) {
+		devman_exchange_end(exch);
+		
+		if (funh != NULL)
+			*funh = -1;
+		
+		return retval;
+	}
+	
+	if (funh != NULL)
+		*funh = (int) IPC_GET_ARG1(answer);
+	
 	link_t *link = match_ids->ids.next;
 	match_id_t *match_id = NULL;
-	int ret = EOK;
-
+	
 	while (link != &match_ids->ids) {
-		match_id = list_get_instance(link, match_id_t, link); 
-		ret = devman_send_match_id(phone, match_id);
-		if (ret != EOK) {
-			return ret;
+		match_id = list_get_instance(link, match_id_t, link);
+		
+		ipc_call_t answer;
+		aid_t req = async_send_1(exch, DEVMAN_ADD_MATCH_ID,
+		    match_id->score, &answer);
+		retval = async_data_write_start(exch, match_id->id,
+		    str_size(match_id->id));
+		if (retval != EOK) {
+			devman_exchange_end(exch);
+			async_wait_for(req, NULL);
+			return retval;
 		}
-
+		
+		async_wait_for(req, &retval);
+		if (retval != EOK) {
+			devman_exchange_end(exch);
+			return retval;
+		}
+		
 		link = link->next;
 	}
-
-	return ret;
-}
-
-/** Add function to a device.
- *
- * Request devman to add a new function to the specified device owned by
- * this driver task.
- *
- * @param name		Name of the new function
- * @param ftype		Function type, fun_inner or fun_exposed
- * @param match_ids	Match IDs (should be empty for fun_exposed)
- * @param devh		Devman handle of the device
- * @param funh		Place to store handle of the new function
- *
- * @return		EOK on success or negative error code.
- */
-int devman_add_function(const char *name, fun_type_t ftype,
-    match_id_list_t *match_ids, devman_handle_t devh, devman_handle_t *funh)
-{
-	int phone = devman_get_phone(DEVMAN_DRIVER, IPC_FLAG_BLOCKING);
-	int fun_handle;
-	
-	if (phone < 0)
-		return phone;
-	
-	async_serialize_start();
-	
-	int match_count = list_count(&match_ids->ids);
-	ipc_call_t answer;
-
-	aid_t req = async_send_3(phone, DEVMAN_ADD_FUNCTION, (sysarg_t) ftype,
-	    devh, match_count, &answer);
-
-	sysarg_t retval = async_data_write_start(phone, name, str_size(name));
-	if (retval != EOK) {
-		async_wait_for(req, NULL);
-		async_serialize_end();
-		return retval;
-	}
-	
-	int match_ids_rc = devman_send_match_ids(phone, match_ids);
-	
-	async_wait_for(req, &retval);
-	
-	async_serialize_end();
-	
-	/* Prefer the answer to DEVMAN_ADD_FUNCTION in case of errors. */
-	if ((match_ids_rc != EOK) && (retval == EOK)) {
-		retval = match_ids_rc;
-	}
-
-	if (retval == EOK)
-		fun_handle = (int) IPC_GET_ARG1(answer);
-	else
-		fun_handle = -1;
-	
-	*funh = fun_handle;
-
-	return retval;
+	
+	devman_exchange_end(exch);
+	return EOK;
 }
 
@@ -217,76 +277,51 @@
     const char *class_name)
 {
-	int phone = devman_get_phone(DEVMAN_DRIVER, IPC_FLAG_BLOCKING);
-	
-	if (phone < 0)
-		return phone;
-	
-	async_serialize_start();
-	ipc_call_t answer;
-	aid_t req = async_send_1(phone, DEVMAN_ADD_DEVICE_TO_CLASS,
+	async_exch_t *exch = devman_exchange_begin_blocking(DEVMAN_DRIVER);
+	
+	ipc_call_t answer;
+	aid_t req = async_send_1(exch, DEVMAN_ADD_DEVICE_TO_CLASS,
 	    devman_handle, &answer);
-	
-	sysarg_t retval = async_data_write_start(phone, class_name,
+	sysarg_t retval = async_data_write_start(exch, class_name,
 	    str_size(class_name));
-	if (retval != EOK) {
-		async_wait_for(req, NULL);
-		async_serialize_end();
+	
+	devman_exchange_end(exch);
+	
+	if (retval != EOK) {
+		async_wait_for(req, NULL);
 		return retval;
 	}
 	
 	async_wait_for(req, &retval);
-	async_serialize_end();
-	
 	return retval;
 }
 
-void devman_hangup_phone(devman_interface_t iface)
-{
-	switch (iface) {
-	case DEVMAN_DRIVER:
-		if (devman_phone_driver >= 0) {
-			async_hangup(devman_phone_driver);
-			devman_phone_driver = -1;
-		}
-		break;
-	case DEVMAN_CLIENT:
-		if (devman_phone_client >= 0) {
-			async_hangup(devman_phone_client);
-			devman_phone_client = -1;
-		}
-		break;
-	default:
-		break;
-	}
-}
-
-int devman_device_connect(devman_handle_t handle, unsigned int flags)
-{
-	int phone;
-	
-	if (flags & IPC_FLAG_BLOCKING) {
-		phone = async_connect_me_to_blocking(PHONE_NS, SERVICE_DEVMAN,
-		    DEVMAN_CONNECT_TO_DEVICE, handle);
-	} else {
-		phone = async_connect_me_to(PHONE_NS, SERVICE_DEVMAN,
-		    DEVMAN_CONNECT_TO_DEVICE, handle);
-	}
-	
-	return phone;
-}
-
-int devman_parent_device_connect(devman_handle_t handle, unsigned int flags)
-{
-	int phone;
-	
-	if (flags & IPC_FLAG_BLOCKING) {
-		phone = async_connect_me_to_blocking(PHONE_NS, SERVICE_DEVMAN,
-		    DEVMAN_CONNECT_TO_PARENTS_DEVICE, handle);
-	} else {
-		phone = async_connect_me_to(PHONE_NS, SERVICE_DEVMAN,
-		    DEVMAN_CONNECT_TO_PARENTS_DEVICE, handle);
-	}
-	
-	return phone;
+async_sess_t *devman_device_connect(exch_mgmt_t mgmt, devman_handle_t handle,
+    unsigned int flags)
+{
+	async_sess_t *sess;
+	
+	if (flags & IPC_FLAG_BLOCKING)
+		sess = service_connect_blocking(mgmt, SERVICE_DEVMAN,
+			    DEVMAN_CONNECT_TO_DEVICE, handle);
+	else
+		sess = service_connect(mgmt, SERVICE_DEVMAN,
+			    DEVMAN_CONNECT_TO_DEVICE, handle);
+	
+	return sess;
+}
+
+async_sess_t *devman_parent_device_connect(exch_mgmt_t mgmt,
+    devman_handle_t handle, unsigned int flags)
+{
+	async_sess_t *sess;
+	
+	if (flags & IPC_FLAG_BLOCKING)
+		sess = service_connect_blocking(mgmt, SERVICE_DEVMAN,
+			    DEVMAN_CONNECT_TO_PARENTS_DEVICE, handle);
+	else
+		sess = service_connect(mgmt, SERVICE_DEVMAN,
+			    DEVMAN_CONNECT_TO_PARENTS_DEVICE, handle);
+	
+	return sess;
 }
 
@@ -294,30 +329,33 @@
     unsigned int flags)
 {
-	int phone = devman_get_phone(DEVMAN_CLIENT, flags);
-	
-	if (phone < 0)
-		return phone;
-	
-	async_serialize_start();
-	
-	ipc_call_t answer;
-	aid_t req = async_send_2(phone, DEVMAN_DEVICE_GET_HANDLE, flags, 0,
+	async_exch_t *exch;
+	
+	if (flags & IPC_FLAG_BLOCKING)
+		exch = devman_exchange_begin_blocking(DEVMAN_CLIENT);
+	else {
+		exch = devman_exchange_begin(DEVMAN_CLIENT);
+		if (exch == NULL)
+			return errno;
+	}
+	
+	ipc_call_t answer;
+	aid_t req = async_send_2(exch, DEVMAN_DEVICE_GET_HANDLE, flags, 0,
 	    &answer);
-	
-	sysarg_t retval = async_data_write_start(phone, pathname,
+	sysarg_t retval = async_data_write_start(exch, pathname,
 	    str_size(pathname));
-	if (retval != EOK) {
-		async_wait_for(req, NULL);
-		async_serialize_end();
+	
+	devman_exchange_end(exch);
+	
+	if (retval != EOK) {
+		async_wait_for(req, NULL);
 		return retval;
 	}
 	
 	async_wait_for(req, &retval);
-	
-	async_serialize_end();
 	
 	if (retval != EOK) {
 		if (handle != NULL)
 			*handle = (devman_handle_t) -1;
+		
 		return retval;
 	}
@@ -332,46 +370,99 @@
     const char *devname, devman_handle_t *handle, unsigned int flags)
 {
-	int phone = devman_get_phone(DEVMAN_CLIENT, flags);
-
-	if (phone < 0)
-		return phone;
-
-	async_serialize_start();
-
-	ipc_call_t answer;
-	aid_t req = async_send_1(phone, DEVMAN_DEVICE_GET_HANDLE_BY_CLASS,
+	async_exch_t *exch;
+	
+	if (flags & IPC_FLAG_BLOCKING)
+		exch = devman_exchange_begin_blocking(DEVMAN_CLIENT);
+	else {
+		exch = devman_exchange_begin(DEVMAN_CLIENT);
+		if (exch == NULL)
+			return errno;
+	}
+	
+	ipc_call_t answer;
+	aid_t req = async_send_1(exch, DEVMAN_DEVICE_GET_HANDLE_BY_CLASS,
 	    flags, &answer);
-
-	sysarg_t retval = async_data_write_start(phone, classname,
+	sysarg_t retval = async_data_write_start(exch, classname,
 	    str_size(classname));
-	if (retval != EOK) {
-		async_wait_for(req, NULL);
-		async_serialize_end();
-		return retval;
-	}
-	retval = async_data_write_start(phone, devname,
+	
+	if (retval != EOK) {
+		devman_exchange_end(exch);
+		async_wait_for(req, NULL);
+		return retval;
+	}
+	
+	retval = async_data_write_start(exch, devname,
 	    str_size(devname));
-	if (retval != EOK) {
-		async_wait_for(req, NULL);
-		async_serialize_end();
-		return retval;
-	}
-
+	
+	devman_exchange_end(exch);
+	
+	if (retval != EOK) {
+		async_wait_for(req, NULL);
+		return retval;
+	}
+	
 	async_wait_for(req, &retval);
-
-	async_serialize_end();
-
+	
 	if (retval != EOK) {
 		if (handle != NULL)
 			*handle = (devman_handle_t) -1;
-		return retval;
-	}
-
+		
+		return retval;
+	}
+	
 	if (handle != NULL)
 		*handle = (devman_handle_t) IPC_GET_ARG1(answer);
-
+	
 	return retval;
 }
 
+int devman_get_device_path(devman_handle_t handle, char *path, size_t path_size)
+{
+	async_exch_t *exch = devman_exchange_begin(DEVMAN_CLIENT);
+	if (exch == NULL)
+		return errno;
+	
+	ipc_call_t answer;
+	aid_t req = async_send_1(exch, DEVMAN_DEVICE_GET_DEVICE_PATH,
+	    handle, &answer);
+	
+	ipc_call_t data_request_call;
+	aid_t data_request = async_data_read(exch, path, path_size,
+	    &data_request_call);
+	
+	devman_exchange_end(exch);
+	
+	if (data_request == 0) {
+		async_wait_for(req, NULL);
+		return ENOMEM;
+	}
+	
+	sysarg_t data_request_rc;
+	async_wait_for(data_request, &data_request_rc);
+	
+	sysarg_t opening_request_rc;
+	async_wait_for(req, &opening_request_rc);
+	
+	if (data_request_rc != EOK) {
+		/* Prefer the return code of the opening request. */
+		if (opening_request_rc != EOK)
+			return (int) opening_request_rc;
+		else
+			return (int) data_request_rc;
+	}
+	
+	if (opening_request_rc != EOK)
+		return (int) opening_request_rc;
+	
+	/* To be on the safe-side. */
+	path[path_size - 1] = 0;
+	size_t transferred_size = IPC_GET_ARG2(data_request_call);
+	if (transferred_size >= path_size)
+		return ELIMIT;
+	
+	/* Terminate the string (trailing 0 not send over IPC). */
+	path[transferred_size] = 0;
+	return EOK;
+}
 
 /** @}
Index: uspace/lib/c/generic/devman_obsolete.c
===================================================================
--- uspace/lib/c/generic/devman_obsolete.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/c/generic/devman_obsolete.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2007 Josef Cejka
+ * Copyright (c) 2009 Jiri Svoboda
+ * Copyright (c) 2010 Lenka Trochtova
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+/** @file
+ */
+
+#include <str.h>
+#include <stdio.h>
+#include <ipc/services.h>
+#include <ipc/devman.h>
+#include <devman_obsolete.h>
+#include <async.h>
+#include <async_obsolete.h>
+#include <ns.h>
+#include <ns_obsolete.h>
+#include <fibril_synch.h>
+#include <errno.h>
+#include <malloc.h>
+#include <bool.h>
+#include <adt/list.h>
+
+static int devman_phone_driver = -1;
+static int devman_phone_client = -1;
+
+static FIBRIL_MUTEX_INITIALIZE(devman_phone_mutex);
+
+int devman_obsolete_get_phone(devman_interface_t iface, unsigned int flags)
+{
+	switch (iface) {
+	case DEVMAN_DRIVER:
+		fibril_mutex_lock(&devman_phone_mutex);
+		if (devman_phone_driver >= 0) {
+			fibril_mutex_unlock(&devman_phone_mutex);
+			return devman_phone_driver;
+		}
+		
+		if (flags & IPC_FLAG_BLOCKING)
+			devman_phone_driver = service_obsolete_connect_blocking(
+			    SERVICE_DEVMAN, DEVMAN_DRIVER, 0);
+		else
+			devman_phone_driver = service_obsolete_connect(SERVICE_DEVMAN,
+			    DEVMAN_DRIVER, 0);
+		
+		fibril_mutex_unlock(&devman_phone_mutex);
+		return devman_phone_driver;
+	case DEVMAN_CLIENT:
+		fibril_mutex_lock(&devman_phone_mutex);
+		if (devman_phone_client >= 0) {
+			fibril_mutex_unlock(&devman_phone_mutex);
+			return devman_phone_client;
+		}
+		
+		if (flags & IPC_FLAG_BLOCKING) {
+			devman_phone_client = service_obsolete_connect_blocking(
+			    SERVICE_DEVMAN, DEVMAN_CLIENT, 0);
+		} else {
+			devman_phone_client = service_obsolete_connect(SERVICE_DEVMAN,
+			    DEVMAN_CLIENT, 0);
+		}
+		
+		fibril_mutex_unlock(&devman_phone_mutex);
+		return devman_phone_client;
+	default:
+		return -1;
+	}
+}
+
+void devman_obsolete_hangup_phone(devman_interface_t iface)
+{
+	switch (iface) {
+	case DEVMAN_DRIVER:
+		if (devman_phone_driver >= 0) {
+			async_obsolete_hangup(devman_phone_driver);
+			devman_phone_driver = -1;
+		}
+		break;
+	case DEVMAN_CLIENT:
+		if (devman_phone_client >= 0) {
+			async_obsolete_hangup(devman_phone_client);
+			devman_phone_client = -1;
+		}
+		break;
+	default:
+		break;
+	}
+}
+
+int devman_obsolete_device_connect(devman_handle_t handle, unsigned int flags)
+{
+	int phone;
+	
+	if (flags & IPC_FLAG_BLOCKING) {
+		phone = service_obsolete_connect_blocking(SERVICE_DEVMAN,
+		    DEVMAN_CONNECT_TO_DEVICE, handle);
+	} else {
+		phone = service_obsolete_connect(SERVICE_DEVMAN,
+		    DEVMAN_CONNECT_TO_DEVICE, handle);
+	}
+	
+	return phone;
+}
+
+int devman_obsolete_parent_device_connect(devman_handle_t handle, unsigned int flags)
+{
+	int phone;
+	
+	if (flags & IPC_FLAG_BLOCKING) {
+		phone = service_obsolete_connect_blocking(SERVICE_DEVMAN,
+		    DEVMAN_CONNECT_TO_PARENTS_DEVICE, handle);
+	} else {
+		phone = service_obsolete_connect(SERVICE_DEVMAN,
+		    DEVMAN_CONNECT_TO_PARENTS_DEVICE, handle);
+	}
+	
+	return phone;
+}
+
+/** @}
+ */
Index: uspace/lib/c/generic/devmap.c
===================================================================
--- uspace/lib/c/generic/devmap.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/devmap.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -30,7 +30,8 @@
 #include <str.h>
 #include <ipc/services.h>
-#include <ipc/ns.h>
+#include <ns.h>
 #include <ipc/devmap.h>
 #include <devmap.h>
+#include <fibril_synch.h>
 #include <async.h>
 #include <errno.h>
@@ -38,58 +39,131 @@
 #include <bool.h>
 
-static int devmap_phone_driver = -1;
-static int devmap_phone_client = -1;
-
-/** Get phone to device mapper task. */
-int devmap_get_phone(devmap_interface_t iface, unsigned int flags)
+static FIBRIL_MUTEX_INITIALIZE(devmap_driver_block_mutex);
+static FIBRIL_MUTEX_INITIALIZE(devmap_client_block_mutex);
+
+static FIBRIL_MUTEX_INITIALIZE(devmap_driver_mutex);
+static FIBRIL_MUTEX_INITIALIZE(devmap_client_mutex);
+
+static async_sess_t *devmap_driver_block_sess = NULL;
+static async_sess_t *devmap_client_block_sess = NULL;
+
+static async_sess_t *devmap_driver_sess = NULL;
+static async_sess_t *devmap_client_sess = NULL;
+
+static void clone_session(fibril_mutex_t *mtx, async_sess_t *src,
+    async_sess_t **dst)
+{
+	fibril_mutex_lock(mtx);
+	
+	if ((*dst == NULL) && (src != NULL))
+		*dst = src;
+	
+	fibril_mutex_unlock(mtx);
+}
+
+/** Start an async exchange on the devmap session (blocking).
+ *
+ * @param iface Device mapper interface to choose
+ *
+ * @return New exchange.
+ *
+ */
+async_exch_t *devmap_exchange_begin_blocking(devmap_interface_t iface)
 {
 	switch (iface) {
 	case DEVMAP_DRIVER:
-		if (devmap_phone_driver >= 0)
-			return devmap_phone_driver;
-		
-		if (flags & IPC_FLAG_BLOCKING)
-			devmap_phone_driver = service_connect_blocking(SERVICE_DEVMAP,
-			    DEVMAP_DRIVER, 0);
-		else
-			devmap_phone_driver = service_connect(SERVICE_DEVMAP,
-			    DEVMAP_DRIVER, 0);
-		
-		return devmap_phone_driver;
+		fibril_mutex_lock(&devmap_driver_block_mutex);
+		
+		while (devmap_driver_block_sess == NULL) {
+			clone_session(&devmap_driver_mutex, devmap_driver_sess,
+			    &devmap_driver_block_sess);
+			
+			if (devmap_driver_block_sess == NULL)
+				devmap_driver_block_sess =
+				    service_connect_blocking(EXCHANGE_SERIALIZE,
+				    SERVICE_DEVMAP, DEVMAP_DRIVER, 0);
+		}
+		
+		fibril_mutex_unlock(&devmap_driver_block_mutex);
+		
+		clone_session(&devmap_driver_mutex, devmap_driver_block_sess,
+		    &devmap_driver_sess);
+		
+		return async_exchange_begin(devmap_driver_block_sess);
 	case DEVMAP_CLIENT:
-		if (devmap_phone_client >= 0)
-			return devmap_phone_client;
-		
-		if (flags & IPC_FLAG_BLOCKING)
-			devmap_phone_client = service_connect_blocking(SERVICE_DEVMAP,
-			    DEVMAP_CLIENT, 0);
-		else
-			devmap_phone_client = service_connect(SERVICE_DEVMAP,
-			    DEVMAP_CLIENT, 0);
-		
-		return devmap_phone_client;
+		fibril_mutex_lock(&devmap_client_block_mutex);
+		
+		while (devmap_client_block_sess == NULL) {
+			clone_session(&devmap_client_mutex, devmap_client_sess,
+			    &devmap_client_block_sess);
+			
+			if (devmap_client_block_sess == NULL)
+				devmap_client_block_sess =
+				    service_connect_blocking(EXCHANGE_SERIALIZE,
+				    SERVICE_DEVMAP, DEVMAP_CLIENT, 0);
+		}
+		
+		fibril_mutex_unlock(&devmap_client_block_mutex);
+		
+		clone_session(&devmap_client_mutex, devmap_client_block_sess,
+		    &devmap_client_sess);
+		
+		return async_exchange_begin(devmap_client_block_sess);
 	default:
-		return -1;
-	}
-}
-
-void devmap_hangup_phone(devmap_interface_t iface)
+		return NULL;
+	}
+}
+
+/** Start an async exchange on the devmap session.
+ *
+ * @param iface Device mapper interface to choose
+ *
+ * @return New exchange.
+ *
+ */
+async_exch_t *devmap_exchange_begin(devmap_interface_t iface)
 {
 	switch (iface) {
 	case DEVMAP_DRIVER:
-		if (devmap_phone_driver >= 0) {
-			async_hangup(devmap_phone_driver);
-			devmap_phone_driver = -1;
-		}
-		break;
+		fibril_mutex_lock(&devmap_driver_mutex);
+		
+		if (devmap_driver_sess == NULL)
+			devmap_driver_sess =
+			    service_connect(EXCHANGE_SERIALIZE, SERVICE_DEVMAP,
+			    DEVMAP_DRIVER, 0);
+		
+		fibril_mutex_unlock(&devmap_driver_mutex);
+		
+		if (devmap_driver_sess == NULL)
+			return NULL;
+		
+		return async_exchange_begin(devmap_driver_sess);
 	case DEVMAP_CLIENT:
-		if (devmap_phone_client >= 0) {
-			async_hangup(devmap_phone_client);
-			devmap_phone_client = -1;
-		}
-		break;
+		fibril_mutex_lock(&devmap_client_mutex);
+		
+		if (devmap_client_sess == NULL)
+			devmap_client_sess =
+			    service_connect(EXCHANGE_SERIALIZE, SERVICE_DEVMAP,
+			    DEVMAP_CLIENT, 0);
+		
+		fibril_mutex_unlock(&devmap_client_mutex);
+		
+		if (devmap_client_sess == NULL)
+			return NULL;
+		
+		return async_exchange_begin(devmap_client_sess);
 	default:
-		break;
-	}
+		return NULL;
+	}
+}
+
+/** Finish an async exchange on the devmap session.
+ *
+ * @param exch Exchange to be finished.
+ *
+ */
+void devmap_exchange_end(async_exch_t *exch)
+{
+	async_exchange_end(exch);
 }
 
@@ -97,28 +171,24 @@
 int devmap_driver_register(const char *name, async_client_conn_t conn)
 {
-	int phone = devmap_get_phone(DEVMAP_DRIVER, IPC_FLAG_BLOCKING);
-	
-	if (phone < 0)
-		return phone;
-	
-	async_serialize_start();
+	async_exch_t *exch = devmap_exchange_begin_blocking(DEVMAP_DRIVER);
 	
 	ipc_call_t answer;
-	aid_t req = async_send_2(phone, DEVMAP_DRIVER_REGISTER, 0, 0, &answer);
-	
-	sysarg_t retval = async_data_write_start(phone, name, str_size(name));
+	aid_t req = async_send_2(exch, DEVMAP_DRIVER_REGISTER, 0, 0, &answer);
+	sysarg_t retval = async_data_write_start(exch, name, str_size(name));
+	
+	devmap_exchange_end(exch);
+	
 	if (retval != EOK) {
 		async_wait_for(req, NULL);
-		async_serialize_end();
-		return -1;
+		return retval;
 	}
 	
 	async_set_client_connection(conn);
 	
-	async_connect_to_me(phone, 0, 0, 0, NULL);
+	exch = devmap_exchange_begin(DEVMAP_DRIVER);
+	async_connect_to_me(exch, 0, 0, 0, NULL);
+	devmap_exchange_end(exch);
+	
 	async_wait_for(req, &retval);
-	
-	async_serialize_end();
-	
 	return retval;
 }
@@ -129,10 +199,11 @@
  * If not 0, the first argument is the interface and the second argument
  * is the devmap handle of the device.
+ *
  * When the interface is zero (default), the first argument is directly
  * the handle (to ensure backward compatibility).
  *
- * @param fqdn Fully qualified device name.
- * @param[out] handle Handle to the created instance of device.
- * @param interface Interface when forwarding.
+ * @param      fqdn      Fully qualified device name.
+ * @param[out] handle    Handle to the created instance of device.
+ * @param      interface Interface when forwarding.
  *
  */
@@ -140,29 +211,24 @@
     devmap_handle_t *handle, sysarg_t interface)
 {
-	int phone = devmap_get_phone(DEVMAP_DRIVER, IPC_FLAG_BLOCKING);
-	
-	if (phone < 0)
-		return phone;
-	
-	async_serialize_start();
+	async_exch_t *exch = devmap_exchange_begin_blocking(DEVMAP_DRIVER);
 	
 	ipc_call_t answer;
-	aid_t req = async_send_2(phone, DEVMAP_DEVICE_REGISTER, interface, 0,
+	aid_t req = async_send_2(exch, DEVMAP_DEVICE_REGISTER, interface, 0,
 	    &answer);
-	
-	sysarg_t retval = async_data_write_start(phone, fqdn, str_size(fqdn));
+	sysarg_t retval = async_data_write_start(exch, fqdn, str_size(fqdn));
+	
+	devmap_exchange_end(exch);
+	
 	if (retval != EOK) {
 		async_wait_for(req, NULL);
-		async_serialize_end();
 		return retval;
 	}
 	
 	async_wait_for(req, &retval);
-	
-	async_serialize_end();
 	
 	if (retval != EOK) {
 		if (handle != NULL)
 			*handle = -1;
+		
 		return retval;
 	}
@@ -176,6 +242,6 @@
 /** Register new device.
  *
- * @param fqdn      Fully qualified device name.
- * @param handle    Output: Handle to the created instance of device.
+ * @param fqdn   Fully qualified device name.
+ * @param handle Output: Handle to the created instance of device.
  *
  */
@@ -185,32 +251,35 @@
 }
 
-
-int devmap_device_get_handle(const char *fqdn, devmap_handle_t *handle, unsigned int flags)
-{
-	int phone = devmap_get_phone(DEVMAP_CLIENT, flags);
-	
-	if (phone < 0)
-		return phone;
-	
-	async_serialize_start();
+int devmap_device_get_handle(const char *fqdn, devmap_handle_t *handle,
+    unsigned int flags)
+{
+	async_exch_t *exch;
+	
+	if (flags & IPC_FLAG_BLOCKING)
+		exch = devmap_exchange_begin_blocking(DEVMAP_CLIENT);
+	else {
+		exch = devmap_exchange_begin(DEVMAP_CLIENT);
+		if (exch == NULL)
+			return errno;
+	}
 	
 	ipc_call_t answer;
-	aid_t req = async_send_2(phone, DEVMAP_DEVICE_GET_HANDLE, flags, 0,
+	aid_t req = async_send_2(exch, DEVMAP_DEVICE_GET_HANDLE, flags, 0,
 	    &answer);
-	
-	sysarg_t retval = async_data_write_start(phone, fqdn, str_size(fqdn));
+	sysarg_t retval = async_data_write_start(exch, fqdn, str_size(fqdn));
+	
+	devmap_exchange_end(exch);
+	
 	if (retval != EOK) {
 		async_wait_for(req, NULL);
-		async_serialize_end();
 		return retval;
 	}
 	
 	async_wait_for(req, &retval);
-	
-	async_serialize_end();
 	
 	if (retval != EOK) {
 		if (handle != NULL)
 			*handle = (devmap_handle_t) -1;
+		
 		return retval;
 	}
@@ -222,31 +291,35 @@
 }
 
-int devmap_namespace_get_handle(const char *name, devmap_handle_t *handle, unsigned int flags)
-{
-	int phone = devmap_get_phone(DEVMAP_CLIENT, flags);
-	
-	if (phone < 0)
-		return phone;
-	
-	async_serialize_start();
+int devmap_namespace_get_handle(const char *name, devmap_handle_t *handle,
+    unsigned int flags)
+{
+	async_exch_t *exch;
+	
+	if (flags & IPC_FLAG_BLOCKING)
+		exch = devmap_exchange_begin_blocking(DEVMAP_CLIENT);
+	else {
+		exch = devmap_exchange_begin(DEVMAP_CLIENT);
+		if (exch == NULL)
+			return errno;
+	}
 	
 	ipc_call_t answer;
-	aid_t req = async_send_2(phone, DEVMAP_NAMESPACE_GET_HANDLE, flags, 0,
+	aid_t req = async_send_2(exch, DEVMAP_NAMESPACE_GET_HANDLE, flags, 0,
 	    &answer);
-	
-	sysarg_t retval = async_data_write_start(phone, name, str_size(name));
+	sysarg_t retval = async_data_write_start(exch, name, str_size(name));
+	
+	devmap_exchange_end(exch);
+	
 	if (retval != EOK) {
 		async_wait_for(req, NULL);
-		async_serialize_end();
 		return retval;
 	}
 	
 	async_wait_for(req, &retval);
-	
-	async_serialize_end();
 	
 	if (retval != EOK) {
 		if (handle != NULL)
 			*handle = (devmap_handle_t) -1;
+		
 		return retval;
 	}
@@ -260,11 +333,11 @@
 devmap_handle_type_t devmap_handle_probe(devmap_handle_t handle)
 {
-	int phone = devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING);
-	
-	if (phone < 0)
-		return phone;
+	async_exch_t *exch = devmap_exchange_begin_blocking(DEVMAP_CLIENT);
 	
 	sysarg_t type;
-	int retval = async_req_1_1(phone, DEVMAP_HANDLE_PROBE, handle, &type);
+	int retval = async_req_1_1(exch, DEVMAP_HANDLE_PROBE, handle, &type);
+	
+	devmap_exchange_end(exch);
+	
 	if (retval != EOK)
 		return DEV_HANDLE_NONE;
@@ -273,28 +346,28 @@
 }
 
-int devmap_device_connect(devmap_handle_t handle, unsigned int flags)
-{
-	int phone;
-	
-	if (flags & IPC_FLAG_BLOCKING) {
-		phone = async_connect_me_to_blocking(PHONE_NS, SERVICE_DEVMAP,
+async_sess_t *devmap_device_connect(exch_mgmt_t mgmt, devmap_handle_t handle,
+    unsigned int flags)
+{
+	async_sess_t *sess;
+	
+	if (flags & IPC_FLAG_BLOCKING)
+		sess = service_connect_blocking(mgmt, SERVICE_DEVMAP,
 		    DEVMAP_CONNECT_TO_DEVICE, handle);
-	} else {
-		phone = async_connect_me_to(PHONE_NS, SERVICE_DEVMAP,
+	else
+		sess = service_connect(mgmt, SERVICE_DEVMAP,
 		    DEVMAP_CONNECT_TO_DEVICE, handle);
-	}
-	
-	return phone;
+	
+	return sess;
 }
 
 int devmap_null_create(void)
 {
-	int phone = devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING);
-	
-	if (phone < 0)
-		return -1;
+	async_exch_t *exch = devmap_exchange_begin_blocking(DEVMAP_CLIENT);
 	
 	sysarg_t null_id;
-	int retval = async_req_0_1(phone, DEVMAP_NULL_CREATE, &null_id);
+	int retval = async_req_0_1(exch, DEVMAP_NULL_CREATE, &null_id);
+	
+	devmap_exchange_end(exch);
+	
 	if (retval != EOK)
 		return -1;
@@ -305,16 +378,13 @@
 void devmap_null_destroy(int null_id)
 {
-	int phone = devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING);
-	
-	if (phone < 0)
-		return;
-	
-	async_req_1_0(phone, DEVMAP_NULL_DESTROY, (sysarg_t) null_id);
-}
-
-static size_t devmap_count_namespaces_internal(int phone)
+	async_exch_t *exch = devmap_exchange_begin_blocking(DEVMAP_CLIENT);
+	async_req_1_0(exch, DEVMAP_NULL_DESTROY, (sysarg_t) null_id);
+	devmap_exchange_end(exch);
+}
+
+static size_t devmap_count_namespaces_internal(async_exch_t *exch)
 {
 	sysarg_t count;
-	int retval = async_req_0_1(phone, DEVMAP_GET_NAMESPACE_COUNT, &count);
+	int retval = async_req_0_1(exch, DEVMAP_GET_NAMESPACE_COUNT, &count);
 	if (retval != EOK)
 		return 0;
@@ -323,8 +393,10 @@
 }
 
-static size_t devmap_count_devices_internal(int phone, devmap_handle_t ns_handle)
+static size_t devmap_count_devices_internal(async_exch_t *exch,
+    devmap_handle_t ns_handle)
 {
 	sysarg_t count;
-	int retval = async_req_1_1(phone, DEVMAP_GET_DEVICE_COUNT, ns_handle, &count);
+	int retval = async_req_1_1(exch, DEVMAP_GET_DEVICE_COUNT, ns_handle,
+	    &count);
 	if (retval != EOK)
 		return 0;
@@ -335,32 +407,28 @@
 size_t devmap_count_namespaces(void)
 {
-	int phone = devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING);
-	
-	if (phone < 0)
-		return 0;
-	
-	return devmap_count_namespaces_internal(phone);
+	async_exch_t *exch = devmap_exchange_begin_blocking(DEVMAP_CLIENT);
+	size_t size = devmap_count_namespaces_internal(exch);
+	devmap_exchange_end(exch);
+	
+	return size;
 }
 
 size_t devmap_count_devices(devmap_handle_t ns_handle)
 {
-	int phone = devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING);
-	
-	if (phone < 0)
-		return 0;
-	
-	return devmap_count_devices_internal(phone, ns_handle);
+	async_exch_t *exch = devmap_exchange_begin_blocking(DEVMAP_CLIENT);
+	size_t size = devmap_count_devices_internal(exch, ns_handle);
+	devmap_exchange_end(exch);
+	
+	return size;
 }
 
 size_t devmap_get_namespaces(dev_desc_t **data)
 {
-	int phone = devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING);
-	
-	if (phone < 0)
-		return 0;
-	
 	/* Loop until namespaces read succesful */
 	while (true) {
-		size_t count = devmap_count_namespaces_internal(phone);
+		async_exch_t *exch = devmap_exchange_begin_blocking(DEVMAP_CLIENT);
+		size_t count = devmap_count_namespaces_internal(exch);
+		devmap_exchange_end(exch);
+		
 		if (count == 0)
 			return 0;
@@ -370,10 +438,12 @@
 			return 0;
 		
-		async_serialize_start();
+		exch = devmap_exchange_begin(DEVMAP_CLIENT);
 		
 		ipc_call_t answer;
-		aid_t req = async_send_0(phone, DEVMAP_GET_NAMESPACES, &answer);
-		
-		int rc = async_data_read_start(phone, devs, count * sizeof(dev_desc_t));
+		aid_t req = async_send_0(exch, DEVMAP_GET_NAMESPACES, &answer);
+		int rc = async_data_read_start(exch, devs, count * sizeof(dev_desc_t));
+		
+		devmap_exchange_end(exch);
+		
 		if (rc == EOVERFLOW) {
 			/*
@@ -381,5 +451,4 @@
 			 * the last call of DEVMAP_DEVICE_GET_NAMESPACE_COUNT
 			 */
-			async_serialize_end();
 			free(devs);
 			continue;
@@ -388,5 +457,4 @@
 		if (rc != EOK) {
 			async_wait_for(req, NULL);
-			async_serialize_end();
 			free(devs);
 			return 0;
@@ -395,5 +463,4 @@
 		sysarg_t retval;
 		async_wait_for(req, &retval);
-		async_serialize_end();
 		
 		if (retval != EOK)
@@ -407,12 +474,10 @@
 size_t devmap_get_devices(devmap_handle_t ns_handle, dev_desc_t **data)
 {
-	int phone = devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING);
-	
-	if (phone < 0)
-		return 0;
-	
-	/* Loop until namespaces read succesful */
+	/* Loop until devices read succesful */
 	while (true) {
-		size_t count = devmap_count_devices_internal(phone, ns_handle);
+		async_exch_t *exch = devmap_exchange_begin_blocking(DEVMAP_CLIENT);
+		size_t count = devmap_count_devices_internal(exch, ns_handle);
+		devmap_exchange_end(exch);
+		
 		if (count == 0)
 			return 0;
@@ -422,10 +487,12 @@
 			return 0;
 		
-		async_serialize_start();
+		exch = devmap_exchange_begin(DEVMAP_CLIENT);
 		
 		ipc_call_t answer;
-		aid_t req = async_send_1(phone, DEVMAP_GET_DEVICES, ns_handle, &answer);
-		
-		int rc = async_data_read_start(phone, devs, count * sizeof(dev_desc_t));
+		aid_t req = async_send_1(exch, DEVMAP_GET_DEVICES, ns_handle, &answer);
+		int rc = async_data_read_start(exch, devs, count * sizeof(dev_desc_t));
+		
+		devmap_exchange_end(exch);
+		
 		if (rc == EOVERFLOW) {
 			/*
@@ -433,5 +500,4 @@
 			 * the last call of DEVMAP_DEVICE_GET_DEVICE_COUNT
 			 */
-			async_serialize_end();
 			free(devs);
 			continue;
@@ -440,5 +506,4 @@
 		if (rc != EOK) {
 			async_wait_for(req, NULL);
-			async_serialize_end();
 			free(devs);
 			return 0;
@@ -447,5 +512,4 @@
 		sysarg_t retval;
 		async_wait_for(req, &retval);
-		async_serialize_end();
 		
 		if (retval != EOK)
Index: uspace/lib/c/generic/devmap_obsolete.c
===================================================================
--- uspace/lib/c/generic/devmap_obsolete.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/c/generic/devmap_obsolete.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2007 Josef Cejka
+ * Copyright (c) 2009 Jiri Svoboda
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <str.h>
+#include <ipc/services.h>
+#include <ns.h>
+#include <ns_obsolete.h>
+#include <ipc/devmap.h>
+#include <devmap_obsolete.h>
+#include <async.h>
+#include <async_obsolete.h>
+#include <errno.h>
+#include <malloc.h>
+#include <bool.h>
+
+static int devmap_phone_driver = -1;
+static int devmap_phone_client = -1;
+
+/** Get phone to device mapper task. */
+int devmap_obsolete_get_phone(devmap_interface_t iface, unsigned int flags)
+{
+	switch (iface) {
+	case DEVMAP_DRIVER:
+		if (devmap_phone_driver >= 0)
+			return devmap_phone_driver;
+		
+		if (flags & IPC_FLAG_BLOCKING)
+			devmap_phone_driver = service_obsolete_connect_blocking(SERVICE_DEVMAP,
+			    DEVMAP_DRIVER, 0);
+		else
+			devmap_phone_driver = service_obsolete_connect(SERVICE_DEVMAP,
+			    DEVMAP_DRIVER, 0);
+		
+		return devmap_phone_driver;
+	case DEVMAP_CLIENT:
+		if (devmap_phone_client >= 0)
+			return devmap_phone_client;
+		
+		if (flags & IPC_FLAG_BLOCKING)
+			devmap_phone_client = service_obsolete_connect_blocking(SERVICE_DEVMAP,
+			    DEVMAP_CLIENT, 0);
+		else
+			devmap_phone_client = service_obsolete_connect(SERVICE_DEVMAP,
+			    DEVMAP_CLIENT, 0);
+		
+		return devmap_phone_client;
+	default:
+		return -1;
+	}
+}
+
+void devmap_obsolete_hangup_phone(devmap_interface_t iface)
+{
+	switch (iface) {
+	case DEVMAP_DRIVER:
+		if (devmap_phone_driver >= 0) {
+			async_obsolete_hangup(devmap_phone_driver);
+			devmap_phone_driver = -1;
+		}
+		break;
+	case DEVMAP_CLIENT:
+		if (devmap_phone_client >= 0) {
+			async_obsolete_hangup(devmap_phone_client);
+			devmap_phone_client = -1;
+		}
+		break;
+	default:
+		break;
+	}
+}
+
+int devmap_obsolete_device_connect(devmap_handle_t handle, unsigned int flags)
+{
+	int phone;
+	
+	if (flags & IPC_FLAG_BLOCKING) {
+		phone = service_obsolete_connect_blocking(SERVICE_DEVMAP,
+		    DEVMAP_CONNECT_TO_DEVICE, handle);
+	} else {
+		phone = service_obsolete_connect(SERVICE_DEVMAP,
+		    DEVMAP_CONNECT_TO_DEVICE, handle);
+	}
+	
+	return phone;
+}
+
+/** @}
+ */
Index: uspace/lib/c/generic/io/console.c
===================================================================
--- uspace/lib/c/generic/io/console.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/io/console.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -37,73 +37,204 @@
 #include <libc.h>
 #include <async.h>
+#include <errno.h>
+#include <stdio.h>
+#include <malloc.h>
+#include <vfs/vfs_sess.h>
 #include <io/console.h>
 #include <ipc/console.h>
 
-void console_clear(int phone)
-{
-	async_msg_0(phone, CONSOLE_CLEAR);
-}
-
-int console_get_size(int phone, sysarg_t *cols, sysarg_t *rows)
-{
-	return async_req_0_2(phone, CONSOLE_GET_SIZE, cols, rows);
-}
-
-void console_set_style(int phone, uint8_t style)
-{
-	async_msg_1(phone, CONSOLE_SET_STYLE, style);
-}
-
-void console_set_color(int phone, uint8_t fg_color, uint8_t bg_color,
+console_ctrl_t *console_init(FILE *ifile, FILE *ofile)
+{
+	console_ctrl_t *ctrl = malloc(sizeof(console_ctrl_t));
+	if (!ctrl)
+		return NULL;
+	
+	ctrl->input_sess = fsession(EXCHANGE_SERIALIZE, ifile);
+	if (!ctrl->input_sess) {
+		free(ctrl);
+		return NULL;
+	}
+	
+	ctrl->output_sess = fsession(EXCHANGE_SERIALIZE, ofile);
+	if (!ctrl->output_sess) {
+		free(ctrl);
+		return NULL;
+	}
+	
+	ctrl->input = ifile;
+	ctrl->output = ofile;
+	ctrl->input_aid = 0;
+	
+	return ctrl;
+}
+
+void console_done(console_ctrl_t *ctrl)
+{
+	free(ctrl);
+}
+
+bool console_kcon(void)
+{
+#if 0
+	return __SYSCALL0(SYS_DEBUG_ACTIVATE_CONSOLE);
+#endif
+	
+	return false;
+}
+
+void console_flush(console_ctrl_t *ctrl)
+{
+	fflush(ctrl->output);
+}
+
+void console_clear(console_ctrl_t *ctrl)
+{
+	async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
+	async_msg_0(exch, CONSOLE_CLEAR);
+	async_exchange_end(exch);
+}
+
+int console_get_size(console_ctrl_t *ctrl, sysarg_t *cols, sysarg_t *rows)
+{
+	async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
+	int rc = async_req_0_2(exch, CONSOLE_GET_SIZE, cols, rows);
+	async_exchange_end(exch);
+	
+	return rc;
+}
+
+void console_set_style(console_ctrl_t *ctrl, uint8_t style)
+{
+	async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
+	async_msg_1(exch, CONSOLE_SET_STYLE, style);
+	async_exchange_end(exch);
+}
+
+void console_set_color(console_ctrl_t *ctrl, uint8_t fg_color, uint8_t bg_color,
     uint8_t flags)
 {
-	async_msg_3(phone, CONSOLE_SET_COLOR, fg_color, bg_color, flags);
-}
-
-void console_set_rgb_color(int phone, uint32_t fg_color, uint32_t bg_color)
-{
-	async_msg_2(phone, CONSOLE_SET_RGB_COLOR, fg_color, bg_color);
-}
-
-void console_cursor_visibility(int phone, bool show)
-{
-	async_msg_1(phone, CONSOLE_CURSOR_VISIBILITY, (show != false));
-}
-
-int console_get_color_cap(int phone, sysarg_t *ccap)
-{
-	return async_req_0_1(phone, CONSOLE_GET_COLOR_CAP, ccap);
-}
-
-void console_kcon_enable(int phone)
-{
-	async_msg_0(phone, CONSOLE_KCON_ENABLE);
-}
-
-int console_get_pos(int phone, sysarg_t *col, sysarg_t *row)
-{
-	return async_req_0_2(phone, CONSOLE_GET_POS, col, row);
-}
-
-void console_set_pos(int phone, sysarg_t col, sysarg_t row)
-{
-	async_msg_2(phone, CONSOLE_GOTO, col, row);
-}
-
-bool console_get_event(int phone, console_event_t *event)
-{
-	sysarg_t type;
-	sysarg_t key;
-	sysarg_t mods;
-	sysarg_t c;
-	
-	int rc = async_req_0_4(phone, CONSOLE_GET_EVENT, &type, &key, &mods, &c);
-	if (rc < 0)
+	async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
+	async_msg_3(exch, CONSOLE_SET_COLOR, fg_color, bg_color, flags);
+	async_exchange_end(exch);
+}
+
+void console_set_rgb_color(console_ctrl_t *ctrl, uint32_t fg_color,
+    uint32_t bg_color)
+{
+	async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
+	async_msg_2(exch, CONSOLE_SET_RGB_COLOR, fg_color, bg_color);
+	async_exchange_end(exch);
+}
+
+void console_cursor_visibility(console_ctrl_t *ctrl, bool show)
+{
+	async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
+	async_msg_1(exch, CONSOLE_CURSOR_VISIBILITY, (show != false));
+	async_exchange_end(exch);
+}
+
+int console_get_color_cap(console_ctrl_t *ctrl, sysarg_t *ccap)
+{
+	async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
+	int rc = async_req_0_1(exch, CONSOLE_GET_COLOR_CAP, ccap);
+	async_exchange_end(exch);
+	
+	return rc;
+}
+
+int console_get_pos(console_ctrl_t *ctrl, sysarg_t *col, sysarg_t *row)
+{
+	async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
+	int rc = async_req_0_2(exch, CONSOLE_GET_POS, col, row);
+	async_exchange_end(exch);
+	
+	return rc;
+}
+
+void console_set_pos(console_ctrl_t *ctrl, sysarg_t col, sysarg_t row)
+{
+	async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
+	async_msg_2(exch, CONSOLE_GOTO, col, row);
+	async_exchange_end(exch);
+}
+
+bool console_get_kbd_event(console_ctrl_t *ctrl, kbd_event_t *event)
+{
+	if (ctrl->input_aid == 0) {
+		sysarg_t type;
+		sysarg_t key;
+		sysarg_t mods;
+		sysarg_t c;
+		
+		async_exch_t *exch = async_exchange_begin(ctrl->input_sess);
+		int rc = async_req_0_4(exch, CONSOLE_GET_EVENT, &type, &key, &mods, &c);
+		async_exchange_end(exch);
+		
+		if (rc != EOK) {
+			errno = rc;
+			return false;
+		}
+		
+		event->type = type;
+		event->key = key;
+		event->mods = mods;
+		event->c = c;
+	} else {
+		sysarg_t retval;
+		async_wait_for(ctrl->input_aid, &retval);
+		
+		ctrl->input_aid = 0;
+		
+		if (retval != EOK) {
+			errno = (int) retval;
+			return false;
+		}
+		
+		event->type = IPC_GET_ARG1(ctrl->input_call);
+		event->key = IPC_GET_ARG2(ctrl->input_call);
+		event->mods = IPC_GET_ARG3(ctrl->input_call);
+		event->c = IPC_GET_ARG4(ctrl->input_call);
+	}
+	
+	return true;
+}
+
+bool console_get_kbd_event_timeout(console_ctrl_t *ctrl, kbd_event_t *event,
+    suseconds_t *timeout)
+{
+	struct timeval t0;
+	gettimeofday(&t0, NULL);
+	
+	if (ctrl->input_aid == 0) {
+		async_exch_t *exch = async_exchange_begin(ctrl->input_sess);
+		ctrl->input_aid = async_send_0(exch, CONSOLE_GET_EVENT,
+		    &ctrl->input_call);
+		async_exchange_end(exch);
+	}
+	
+	sysarg_t retval;
+	int rc = async_wait_timeout(ctrl->input_aid, &retval, *timeout);
+	if (rc != EOK) {
+		*timeout = 0;
+		errno = rc;
 		return false;
-	
-	event->type = type;
-	event->key = key;
-	event->mods = mods;
-	event->c = c;
+	}
+	
+	ctrl->input_aid = 0;
+	
+	if (retval != EOK) {
+		errno = (int) retval;
+		return false;
+	}
+	
+	event->type = IPC_GET_ARG1(ctrl->input_call);
+	event->key = IPC_GET_ARG2(ctrl->input_call);
+	event->mods = IPC_GET_ARG3(ctrl->input_call);
+	event->c = IPC_GET_ARG4(ctrl->input_call);
+	
+	/* Update timeout */
+	struct timeval t1;
+	gettimeofday(&t1, NULL);
+	*timeout -= tv_sub(&t1, &t0);
 	
 	return true;
Index: uspace/lib/c/generic/io/io.c
===================================================================
--- uspace/lib/c/generic/io/io.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/io/io.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -44,7 +44,9 @@
 #include <io/klog.h>
 #include <vfs/vfs.h>
+#include <vfs/vfs_sess.h>
 #include <ipc/devmap.h>
 #include <adt/list.h>
 #include "../private/io.h"
+#include "../private/stdio.h"
 
 static void _ffillbuf(FILE *stream);
@@ -56,5 +58,5 @@
 	.eof = true,
 	.klog = false,
-	.phone = -1,
+	.sess = NULL,
 	.btype = _IONBF,
 	.buf = NULL,
@@ -70,5 +72,5 @@
 	.eof = false,
 	.klog = true,
-	.phone = -1,
+	.sess = NULL,
 	.btype = _IOLBF,
 	.buf = NULL,
@@ -84,5 +86,5 @@
 	.eof = false,
 	.klog = true,
-	.phone = -1,
+	.sess = NULL,
 	.btype = _IONBF,
 	.buf = NULL,
@@ -255,5 +257,5 @@
 	stream->eof = false;
 	stream->klog = false;
-	stream->phone = -1;
+	stream->sess = NULL;
 	stream->need_sync = false;
 	_setvbuf(stream);
@@ -277,5 +279,5 @@
 	stream->eof = false;
 	stream->klog = false;
-	stream->phone = -1;
+	stream->sess = NULL;
 	stream->need_sync = false;
 	_setvbuf(stream);
@@ -309,5 +311,5 @@
 	stream->eof = false;
 	stream->klog = false;
-	stream->phone = -1;
+	stream->sess = NULL;
 	stream->need_sync = false;
 	_setvbuf(stream);
@@ -324,6 +326,6 @@
 	fflush(stream);
 	
-	if (stream->phone >= 0)
-		async_hangup(stream->phone);
+	if (stream->sess != NULL)
+		async_hangup(stream->sess);
 	
 	if (stream->fd >= 0)
@@ -732,5 +734,5 @@
 	}
 	
-	if (stream->fd >= 0 && stream->need_sync) {
+	if ((stream->fd >= 0) && (stream->need_sync)) {
 		/**
 		 * Better than syncing always, but probably still not the
@@ -770,14 +772,14 @@
 }
 
-int fphone(FILE *stream)
+async_sess_t *fsession(exch_mgmt_t mgmt, FILE *stream)
 {
 	if (stream->fd >= 0) {
-		if (stream->phone < 0)
-			stream->phone = fd_phone(stream->fd);
-		
-		return stream->phone;
-	}
-	
-	return -1;
+		if (stream->sess == NULL)
+			stream->sess = fd_session(mgmt, stream->fd);
+		
+		return stream->sess;
+	}
+	
+	return NULL;
 }
 
Index: uspace/lib/c/generic/ipc.c
===================================================================
--- uspace/lib/c/generic/ipc.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/ipc.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -632,4 +632,22 @@
 }
 
+/** Request cloned connection.
+ *
+ * @param phoneid Phone handle used for contacting the other side.
+ *
+ * @return Cloned phone handle on success or a negative error code.
+ *
+ */
+int ipc_connect_me(int phoneid)
+{
+	sysarg_t newphid;
+	int res = ipc_call_sync_0_5(phoneid, IPC_M_CONNECT_ME, NULL, NULL,
+	    NULL, NULL, &newphid);
+	if (res)
+		return res;
+	
+	return newphid;
+}
+
 /** Request new connection.
  *
Index: uspace/lib/c/generic/ipc/ns.c
===================================================================
--- uspace/lib/c/generic/ipc/ns.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ 	(revision )
@@ -1,54 +1,0 @@
-/*
- * Copyright (c) 2011 Martin Decky
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * - Redistributions of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * - Redistributions in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * - The name of the author may not be used to endorse or promote products
- *   derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/** @addtogroup libc
- * @{
- */
-/** @file
- */
-
-#include <async.h>
-#include <ipc/ns.h>
-
-int service_register(sysarg_t service)
-{
-	return async_connect_to_me(PHONE_NS, service, 0, 0, NULL);
-}
-
-int service_connect(sysarg_t service, sysarg_t arg2, sysarg_t arg3)
-{
-	return async_connect_me_to(PHONE_NS, service, arg2, arg3);
-}
-
-int service_connect_blocking(sysarg_t service, sysarg_t arg2, sysarg_t arg3)
-{
-	return async_connect_me_to_blocking(PHONE_NS, service, arg2, arg3);
-}
-
-/** @}
- */
Index: uspace/lib/c/generic/l18n/langs.c
===================================================================
--- uspace/lib/c/generic/l18n/langs.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/c/generic/l18n/langs.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+/** @file
+ * Language and locale ids.
+ */
+
+#include <l18n/langs.h>
+#include <stdio.h>
+#include <fibril.h>
+
+#define UNKNOWN_LOCALE_LEN 64
+
+static fibril_local char unknown_locale[UNKNOWN_LOCALE_LEN];
+
+/** Get string representation of a given locale.
+ *
+ * @param locale The locale.
+ * @return Name of the locale.
+ */
+const char *str_l18_win_locale(l18_win_locales_t locale)
+{
+	/*
+	 * Static array with names might be better but it would be
+	 * way too big.
+	 */
+	switch (locale) {
+		case L18N_WIN_LOCALE_AFRIKAANS:
+			return "Afrikaans";
+		case L18N_WIN_LOCALE_CZECH:
+			return "Czech";
+		case L18N_WIN_LOCALE_ENGLISH_UNITED_STATES:
+			return "English (US)";
+		case L18N_WIN_LOCALE_SLOVAK:
+			return "Slovak";
+		case L18N_WIN_LOCALE_SPANISH_TRADITIONAL:
+			return "Spanish (traditional)";
+		case L18N_WIN_LOCALE_ZULU:
+			return "Zulu";
+	}
+
+	snprintf(unknown_locale, UNKNOWN_LOCALE_LEN, "Unknown locale 0x%04d",
+	    (int) locale);
+	return unknown_locale;
+}
+
+/** @}
+ */
Index: uspace/lib/c/generic/libc.c
===================================================================
--- uspace/lib/c/generic/libc.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/libc.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -49,5 +49,4 @@
 #include "private/libc.h"
 #include "private/async.h"
-#include "private/async_sess.h"
 #include "private/malloc.h"
 #include "private/io.h"
@@ -64,5 +63,4 @@
 	__malloc_init();
 	__async_init();
-	__async_sess_init();
 	
 	fibril_t *fibril = fibril_setup();
Index: uspace/lib/c/generic/loader.c
===================================================================
--- uspace/lib/c/generic/loader.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/loader.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -35,5 +35,5 @@
 #include <ipc/loader.h>
 #include <ipc/services.h>
-#include <ipc/ns.h>
+#include <ns.h>
 #include <libc.h>
 #include <task.h>
@@ -44,4 +44,5 @@
 #include <vfs/vfs.h>
 #include <loader/loader.h>
+#include "private/loader.h"
 
 /** Connect to a new program loader.
@@ -63,13 +64,16 @@
 loader_t *loader_connect(void)
 {
-	int phone_id = service_connect_blocking(SERVICE_LOAD, 0, 0);
-	if (phone_id < 0)
-		return NULL;
-	
 	loader_t *ldr = malloc(sizeof(loader_t));
 	if (ldr == NULL)
 		return NULL;
 	
-	ldr->phone_id = phone_id;
+	async_sess_t *sess =
+	    service_connect_blocking(EXCHANGE_SERIALIZE, SERVICE_LOAD, 0, 0);
+	if (sess == NULL) {
+		free(ldr);
+		return NULL;
+	}
+	
+	ldr->sess = sess;
 	return ldr;
 }
@@ -88,15 +92,19 @@
 {
 	/* Get task ID. */
-	ipc_call_t answer;
-	aid_t req = async_send_0(ldr->phone_id, LOADER_GET_TASKID, &answer);
-	int rc = async_data_read_start(ldr->phone_id, task_id, sizeof(task_id_t));
-	if (rc != EOK) {
-		async_wait_for(req, NULL);
-		return rc;
-	}
-	
-	sysarg_t retval;
-	async_wait_for(req, &retval);
-	return (int) retval;
+	async_exch_t *exch = async_exchange_begin(ldr->sess);
+	
+	ipc_call_t answer;
+	aid_t req = async_send_0(exch, LOADER_GET_TASKID, &answer);
+	sysarg_t rc = async_data_read_start(exch, task_id, sizeof(task_id_t));
+	
+	async_exchange_end(exch);
+	
+	if (rc != EOK) {
+		async_wait_for(req, NULL);
+		return (int) rc;
+	}
+	
+	async_wait_for(req, &rc);
+	return (int) rc;
 }
 
@@ -112,26 +120,29 @@
 int loader_set_cwd(loader_t *ldr)
 {
-	char *cwd;
-	size_t len;
-
-	cwd = (char *) malloc(MAX_PATH_LEN + 1);
+	char *cwd = (char *) malloc(MAX_PATH_LEN + 1);
 	if (!cwd)
 		return ENOMEM;
+	
 	if (!getcwd(cwd, MAX_PATH_LEN + 1))
-		str_cpy(cwd, MAX_PATH_LEN + 1, "/"); 
-	len = str_length(cwd);
-	
-	ipc_call_t answer;
-	aid_t req = async_send_0(ldr->phone_id, LOADER_SET_CWD, &answer);
-	int rc = async_data_write_start(ldr->phone_id, cwd, len);
+		str_cpy(cwd, MAX_PATH_LEN + 1, "/");
+	
+	size_t len = str_length(cwd);
+	
+	async_exch_t *exch = async_exchange_begin(ldr->sess);
+	
+	ipc_call_t answer;
+	aid_t req = async_send_0(exch, LOADER_SET_CWD, &answer);
+	sysarg_t rc = async_data_write_start(exch, cwd, len);
+	
+	async_exchange_end(exch);
 	free(cwd);
-	if (rc != EOK) {
-		async_wait_for(req, NULL);
-		return rc;
-	}
-	
-	sysarg_t retval;
-	async_wait_for(req, &retval);
-	return (int) retval;
+	
+	if (rc != EOK) {
+		async_wait_for(req, NULL);
+		return (int) rc;
+	}
+	
+	async_wait_for(req, &rc);
+	return (int) rc;
 }
 
@@ -153,21 +164,23 @@
 	char *pa = absolutize(path, &pa_len);
 	if (!pa)
-		return 0;
+		return ENOMEM;
 	
 	/* Send program pathname */
-	ipc_call_t answer;
-	aid_t req = async_send_0(ldr->phone_id, LOADER_SET_PATHNAME, &answer);
-	int rc = async_data_write_start(ldr->phone_id, (void *) pa, pa_len);
-	if (rc != EOK) {
-		free(pa);
-		async_wait_for(req, NULL);
-		return rc;
-	}
-	
+	async_exch_t *exch = async_exchange_begin(ldr->sess);
+	
+	ipc_call_t answer;
+	aid_t req = async_send_0(exch, LOADER_SET_PATHNAME, &answer);
+	sysarg_t rc = async_data_write_start(exch, (void *) pa, pa_len);
+	
+	async_exchange_end(exch);
 	free(pa);
 	
-	sysarg_t retval;
-	async_wait_for(req, &retval);
-	return (int) retval;
+	if (rc != EOK) {
+		async_wait_for(req, NULL);
+		return (int) rc;
+	}
+	
+	async_wait_for(req, &rc);
+	return (int) rc;
 }
 
@@ -212,20 +225,21 @@
 	
 	/* Send serialized arguments to the loader */
-	ipc_call_t answer;
-	aid_t req = async_send_0(ldr->phone_id, LOADER_SET_ARGS, &answer);
-	sysarg_t rc = async_data_write_start(ldr->phone_id, (void *) arg_buf, buffer_size);
-	if (rc != EOK) {
-		async_wait_for(req, NULL);
-		return rc;
-	}
-	
-	async_wait_for(req, &rc);
-	if (rc != EOK)
-		return rc;
-	
-	/* Free temporary buffer */
+	async_exch_t *exch = async_exchange_begin(ldr->sess);
+	
+	ipc_call_t answer;
+	aid_t req = async_send_0(exch, LOADER_SET_ARGS, &answer);
+	sysarg_t rc = async_data_write_start(exch, (void *) arg_buf,
+	    buffer_size);
+	
+	async_exchange_end(exch);
 	free(arg_buf);
 	
-	return EOK;
+	if (rc != EOK) {
+		async_wait_for(req, NULL);
+		return (int) rc;
+	}
+	
+	async_wait_for(req, &rc);
+	return (int) rc;
 }
 
@@ -266,21 +280,21 @@
 	
 	/* Send serialized files to the loader */
-	ipc_call_t answer;
-	aid_t req = async_send_0(ldr->phone_id, LOADER_SET_FILES, &answer);
-	sysarg_t rc = async_data_write_start(ldr->phone_id, (void *) files_buf,
+	async_exch_t *exch = async_exchange_begin(ldr->sess);
+	
+	ipc_call_t answer;
+	aid_t req = async_send_0(exch, LOADER_SET_FILES, &answer);
+	sysarg_t rc = async_data_write_start(exch, (void *) files_buf,
 	    count * sizeof(fdi_node_t));
-	if (rc != EOK) {
-		async_wait_for(req, NULL);
-		return rc;
-	}
-	
-	async_wait_for(req, &rc);
-	if (rc != EOK)
-		return rc;
-	
-	/* Free temporary buffer */
+	
+	async_exchange_end(exch);
 	free(files_buf);
 	
-	return EOK;
+	if (rc != EOK) {
+		async_wait_for(req, NULL);
+		return (int) rc;
+	}
+	
+	async_wait_for(req, &rc);
+	return (int) rc;
 }
 
@@ -297,5 +311,9 @@
 int loader_load_program(loader_t *ldr)
 {
-	return (int) async_req_0_0(ldr->phone_id, LOADER_LOAD);
+	async_exch_t *exch = async_exchange_begin(ldr->sess);
+	int rc = async_req_0_0(exch, LOADER_LOAD);
+	async_exchange_end(exch);
+	
+	return rc;
 }
 
@@ -306,6 +324,6 @@
  * the task and its thread is stopped.
  *
- * After using this function, no further operations must be performed
- * on the loader structure. It should be de-allocated using free().
+ * After using this function, no further operations can be performed
+ * on the loader structure and it is deallocated.
  *
  * @param ldr Loader connection structure.
@@ -316,10 +334,14 @@
 int loader_run(loader_t *ldr)
 {
-	int rc = async_req_0_0(ldr->phone_id, LOADER_RUN);
+	async_exch_t *exch = async_exchange_begin(ldr->sess);
+	int rc = async_req_0_0(exch, LOADER_RUN);
+	async_exchange_end(exch);
+	
 	if (rc != EOK)
 		return rc;
 	
-	async_hangup(ldr->phone_id);
-	ldr->phone_id = 0;
+	async_hangup(ldr->sess);
+	free(ldr);
+	
 	return EOK;
 }
@@ -327,7 +349,7 @@
 /** Cancel the loader session.
  *
- * Tells the loader not to load any program and terminate.
- * After using this function, no further operations must be performed
- * on the loader structure. It should be de-allocated using free().
+ * Tell the loader not to load any program and terminate.
+ * After using this function, no further operations can be performed
+ * on the loader structure and it is deallocated.
  *
  * @param ldr Loader connection structure.
@@ -338,6 +360,6 @@
 void loader_abort(loader_t *ldr)
 {
-	async_hangup(ldr->phone_id);
-	ldr->phone_id = 0;
+	async_hangup(ldr->sess);
+	free(ldr);
 }
 
Index: uspace/lib/c/generic/net/icmp_api.c
===================================================================
--- uspace/lib/c/generic/net/icmp_api.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/net/icmp_api.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -42,4 +42,5 @@
 #include <net/ip_codes.h>
 #include <async.h>
+#include <async_obsolete.h>
 #include <sys/types.h>
 #include <sys/time.h>
@@ -83,9 +84,9 @@
 		return EINVAL;
 
-	message_id = async_send_5(icmp_phone, NET_ICMP_ECHO, size, timeout, ttl,
+	message_id = async_obsolete_send_5(icmp_phone, NET_ICMP_ECHO, size, timeout, ttl,
 	    tos, (sysarg_t) dont_fragment, NULL);
 
 	/* Send the address */
-	async_data_write_start(icmp_phone, addr, (size_t) addrlen);
+	async_obsolete_data_write_start(icmp_phone, addr, (size_t) addrlen);
 
 	async_wait_for(message_id, &result);
Index: uspace/lib/c/generic/net/modules.c
===================================================================
--- uspace/lib/c/generic/net/modules.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/net/modules.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -40,4 +40,5 @@
 
 #include <async.h>
+#include <async_obsolete.h>
 #include <malloc.h>
 #include <errno.h>
@@ -45,7 +46,9 @@
 #include <ipc/services.h>
 #include <net/modules.h>
+#include <ns.h>
+#include <ns_obsolete.h>
 
 /** The time between connect requests in microseconds. */
-#define MODULE_WAIT_TIME	(10 * 1000)
+#define MODULE_WAIT_TIME  (10 * 1000)
 
 /** Answer a call.
@@ -138,7 +141,7 @@
 	if (phone >= 0) {
 		/* Request the bidirectional connection */
-		int rc = async_connect_to_me(phone, arg1, arg2, arg3, client_receiver);
+		int rc = async_obsolete_connect_to_me(phone, arg1, arg2, arg3, client_receiver);
 		if (rc != EOK) {
-			async_hangup(phone);
+			async_obsolete_hangup(phone);
 			return rc;
 		}
@@ -172,8 +175,8 @@
 	/* If no timeout is set */
 	if (timeout <= 0)
-		return async_connect_me_to_blocking(PHONE_NS, need, 0, 0);
-
+		return service_obsolete_connect_blocking(need, 0, 0);
+	
 	while (true) {
-		phone = async_connect_me_to(PHONE_NS, need, 0, 0);
+		phone = service_obsolete_connect(need, 0, 0);
 		if ((phone >= 0) || (phone != ENOENT))
 			return phone;
Index: uspace/lib/c/generic/net/socket_client.c
===================================================================
--- uspace/lib/c/generic/net/socket_client.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/net/socket_client.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -39,4 +39,5 @@
 #include <assert.h>
 #include <async.h>
+#include <async_obsolete.h>
 #include <fibril_synch.h>
 #include <stdint.h>
@@ -472,5 +473,5 @@
 	}
 
-	rc = (int) async_req_3_3(phone, NET_SOCKET, socket_id, 0, service, NULL,
+	rc = (int) async_obsolete_req_3_3(phone, NET_SOCKET, socket_id, 0, service, NULL,
 	    &fragment_size, &header_size);
 	if (rc != EOK) {
@@ -493,5 +494,5 @@
 		dyn_fifo_destroy(&socket->accepted);
 		free(socket);
-		async_msg_3(phone, NET_SOCKET_CLOSE, (sysarg_t) socket_id, 0,
+		async_obsolete_msg_3(phone, NET_SOCKET_CLOSE, (sysarg_t) socket_id, 0,
 		    service);
 		return rc;
@@ -538,8 +539,8 @@
 
 	/* Request the message */
-	message_id = async_send_3(socket->phone, message,
+	message_id = async_obsolete_send_3(socket->phone, message,
 	    (sysarg_t) socket->socket_id, arg2, socket->service, NULL);
 	/* Send the address */
-	async_data_write_start(socket->phone, data, datalength);
+	async_obsolete_data_write_start(socket->phone, data, datalength);
 
 	fibril_rwlock_read_unlock(&socket_globals.lock);
@@ -598,5 +599,5 @@
 
 	/* Request listen backlog change */
-	result = (int) async_req_3_0(socket->phone, NET_SOCKET_LISTEN,
+	result = (int) async_obsolete_req_3_0(socket->phone, NET_SOCKET_LISTEN,
 	    (sysarg_t) socket->socket_id, (sysarg_t) backlog, socket->service);
 
@@ -681,10 +682,10 @@
 
 	/* Request accept */
-	message_id = async_send_5(socket->phone, NET_SOCKET_ACCEPT,
+	message_id = async_obsolete_send_5(socket->phone, NET_SOCKET_ACCEPT,
 	    (sysarg_t) socket->socket_id, 0, socket->service, 0,
 	    new_socket->socket_id, &answer);
 
 	/* Read address */
-	async_data_read_start(socket->phone, cliaddr, *addrlen);
+	async_obsolete_data_read_start(socket->phone, cliaddr, *addrlen);
 	fibril_rwlock_write_unlock(&socket_globals.lock);
 	async_wait_for(message_id, &ipc_result);
@@ -780,5 +781,5 @@
 
 	/* Request close */
-	rc = (int) async_req_3_0(socket->phone, NET_SOCKET_CLOSE,
+	rc = (int) async_obsolete_req_3_0(socket->phone, NET_SOCKET_CLOSE,
 	    (sysarg_t) socket->socket_id, 0, socket->service);
 	if (rc != EOK) {
@@ -853,5 +854,5 @@
 
 	/* Request send */
-	message_id = async_send_5(socket->phone, message,
+	message_id = async_obsolete_send_5(socket->phone, message,
 	    (sysarg_t) socket->socket_id,
 	    (fragments == 1 ? datalength : socket->data_fragment_size),
@@ -860,11 +861,11 @@
 	/* Send the address if given */
 	if (!toaddr ||
-	    (async_data_write_start(socket->phone, toaddr, addrlen) == EOK)) {
+	    (async_obsolete_data_write_start(socket->phone, toaddr, addrlen) == EOK)) {
 		if (fragments == 1) {
 			/* Send all if only one fragment */
-			async_data_write_start(socket->phone, data, datalength);
+			async_obsolete_data_write_start(socket->phone, data, datalength);
 		} else {
 			/* Send the first fragment */
-			async_data_write_start(socket->phone, data,
+			async_obsolete_data_write_start(socket->phone, data,
 			    socket->data_fragment_size - socket->header_size);
 			data = ((const uint8_t *) data) +
@@ -873,5 +874,5 @@
 			/* Send the middle fragments */
 			while (--fragments > 1) {
-				async_data_write_start(socket->phone, data,
+				async_obsolete_data_write_start(socket->phone, data,
 				    socket->data_fragment_size);
 				data = ((const uint8_t *) data) +
@@ -880,5 +881,5 @@
 
 			/* Send the last fragment */
-			async_data_write_start(socket->phone, data,
+			async_obsolete_data_write_start(socket->phone, data,
 			    (datalength + socket->header_size) %
 			    socket->data_fragment_size);
@@ -1038,5 +1039,5 @@
 
 		/* Request packet data */
-		message_id = async_send_4(socket->phone, message,
+		message_id = async_obsolete_send_4(socket->phone, message,
 		    (sysarg_t) socket->socket_id, 0, socket->service,
 		    (sysarg_t) flags, &answer);
@@ -1044,8 +1045,8 @@
 		/* Read the address if desired */
 		if(!fromaddr ||
-		    (async_data_read_start(socket->phone, fromaddr,
+		    (async_obsolete_data_read_start(socket->phone, fromaddr,
 		    *addrlen) == EOK)) {
 			/* Read the fragment lengths */
-			if (async_data_read_start(socket->phone, lengths,
+			if (async_obsolete_data_read_start(socket->phone, lengths,
 			    sizeof(int) * (fragments + 1)) == EOK) {
 				if (lengths[fragments] <= datalength) {
@@ -1054,5 +1055,5 @@
 					for (index = 0; index < fragments;
 					    ++index) {
-						async_data_read_start(
+						async_obsolete_data_read_start(
 						    socket->phone, data,
 						    lengths[index]);
@@ -1067,5 +1068,5 @@
 	} else { /* fragments == 1 */
 		/* Request packet data */
-		message_id = async_send_4(socket->phone, message,
+		message_id = async_obsolete_send_4(socket->phone, message,
 		    (sysarg_t) socket->socket_id, 0, socket->service,
 		    (sysarg_t) flags, &answer);
@@ -1073,8 +1074,8 @@
 		/* Read the address if desired */
 		if (!fromaddr ||
-		    (async_data_read_start(socket->phone, fromaddr,
+		    (async_obsolete_data_read_start(socket->phone, fromaddr,
 		        *addrlen) == EOK)) {
 			/* Read all if only one fragment */
-			async_data_read_start(socket->phone, data, datalength);
+			async_obsolete_data_read_start(socket->phone, data, datalength);
 		}
 	}
@@ -1190,13 +1191,13 @@
 
 	/* Request option value */
-	message_id = async_send_3(socket->phone, NET_SOCKET_GETSOCKOPT,
+	message_id = async_obsolete_send_3(socket->phone, NET_SOCKET_GETSOCKOPT,
 	    (sysarg_t) socket->socket_id, (sysarg_t) optname, socket->service,
 	    NULL);
 
 	/* Read the length */
-	if (async_data_read_start(socket->phone, optlen,
+	if (async_obsolete_data_read_start(socket->phone, optlen,
 	    sizeof(*optlen)) == EOK) {
 		/* Read the value */
-		async_data_read_start(socket->phone, value, *optlen);
+		async_obsolete_data_read_start(socket->phone, value, *optlen);
 	}
 
Index: uspace/lib/c/generic/ns.c
===================================================================
--- uspace/lib/c/generic/ns.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/c/generic/ns.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2011 Martin Decky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+/** @file
+ */
+
+#include <ns.h>
+#include <ipc/ns.h>
+#include <async.h>
+#include <macros.h>
+#include "private/ns.h"
+
+int service_register(sysarg_t service)
+{
+	async_exch_t *exch = async_exchange_begin(session_ns);
+	int rc = async_connect_to_me(exch, service, 0, 0, NULL);
+	async_exchange_end(exch);
+	
+	return rc;
+}
+
+async_sess_t *service_connect(exch_mgmt_t mgmt, sysarg_t service, sysarg_t arg2,
+    sysarg_t arg3)
+{
+	async_exch_t *exch = async_exchange_begin(session_ns);
+	async_sess_t *sess =
+	    async_connect_me_to(mgmt, exch, service, arg2, arg3);
+	async_exchange_end(exch);
+	
+	return sess;
+}
+
+async_sess_t *service_connect_blocking(exch_mgmt_t mgmt, sysarg_t service,
+    sysarg_t arg2, sysarg_t arg3)
+{
+	async_exch_t *exch = async_exchange_begin(session_ns);
+	async_sess_t *sess =
+	    async_connect_me_to_blocking(mgmt, exch, service, arg2, arg3);
+	async_exchange_end(exch);
+	
+	return sess;
+}
+
+int ns_ping(void)
+{
+	async_exch_t *exch = async_exchange_begin(session_ns);
+	int rc = async_req_0_0(exch, NS_PING);
+	async_exchange_end(exch);
+	
+	return rc;
+}
+
+int ns_intro(task_id_t id)
+{
+	async_exch_t *exch = async_exchange_begin(session_ns);
+	int rc = async_req_2_0(exch, NS_ID_INTRO, LOWER32(id), UPPER32(id));
+	async_exchange_end(exch);
+	
+	return rc;
+}
+
+/** @}
+ */
Index: uspace/lib/c/generic/ns_obsolete.c
===================================================================
--- uspace/lib/c/generic/ns_obsolete.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/c/generic/ns_obsolete.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2011 Martin Decky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+/** @file
+ */
+
+#include <async.h>
+#include <async_obsolete.h>
+#include <ns_obsolete.h>
+#include <kernel/ipc/ipc_methods.h>
+
+int service_obsolete_connect(sysarg_t service, sysarg_t arg2, sysarg_t arg3)
+{
+	return async_obsolete_connect_me_to(PHONE_NS, service, arg2, arg3);
+}
+
+int service_obsolete_connect_blocking(sysarg_t service, sysarg_t arg2, sysarg_t arg3)
+{
+	return async_obsolete_connect_me_to_blocking(PHONE_NS, service, arg2, arg3);
+}
+
+/** @}
+ */
Index: uspace/lib/c/generic/private/async.h
===================================================================
--- uspace/lib/c/generic/private/async.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/private/async.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -79,6 +79,20 @@
 } awaiter_t;
 
+/** Message data */
+typedef struct {
+	awaiter_t wdata;
+	
+	/** If reply was received. */
+	bool done;
+	
+	/** Pointer to where the answer data is stored. */
+	ipc_call_t *dataptr;
+	
+	sysarg_t retval;
+} amsg_t;
+
 extern void __async_init(void);
 extern void async_insert_timeout(awaiter_t *);
+extern void reply_received(void *, int, ipc_call_t *);
 
 #endif
Index: uspace/lib/c/generic/private/async_sess.h
===================================================================
--- uspace/lib/c/generic/private/async_sess.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ 	(revision )
@@ -1,43 +1,0 @@
-/*
- * Copyright (c) 2011 Martin Decky
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * - Redistributions of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * - Redistributions in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * - The name of the author may not be used to endorse or promote products
- *   derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/** @addtogroup libc
- * @{
- */
-/** @file
- */
-
-#ifndef LIBC_PRIVATE_ASYNC_SESS_H_
-#define LIBC_PRIVATE_ASYNC_SESS_H_
-
-extern void __async_sess_init(void);
-
-#endif
-
-/** @}
- */
Index: uspace/lib/c/generic/private/loader.h
===================================================================
--- uspace/lib/c/generic/private/loader.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/c/generic/private/loader.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2011 Martin Decky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+/** @file
+ */
+
+#ifndef LIBC_PRIVATE_LOADER_H_
+#define LIBC_PRIVATE_LOADER_H_
+
+#include <loader/loader.h>
+
+/** Abstraction of a loader connection */
+struct loader {
+	/** Session to the loader. */
+	async_sess_t *sess;
+};
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/c/generic/private/ns.h
===================================================================
--- uspace/lib/c/generic/private/ns.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/c/generic/private/ns.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2011 Martin Decky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+/** @file
+ */
+
+#ifndef LIBC_PRIVATE_NS_H_
+#define LIBC_PRIVATE_NS_H_
+
+#include <async.h>
+
+extern async_sess_t *session_ns;
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/c/generic/private/stdio.h
===================================================================
--- uspace/lib/c/generic/private/stdio.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/c/generic/private/stdio.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2011 Martin Decky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+/** @file
+ */
+
+#ifndef LIBC_PRIVATE_STDIO_H_
+#define LIBC_PRIVATE_STDIO_H_
+
+#include <adt/list.h>
+#include <stdio.h>
+#include <async.h>
+
+struct _IO_FILE {
+	/** Linked list pointer. */
+	link_t link;
+	
+	/** Underlying file descriptor. */
+	int fd;
+	
+	/** Error indicator. */
+	int error;
+	
+	/** End-of-file indicator. */
+	int eof;
+	
+	/** Klog indicator */
+	int klog;
+	
+	/** Session to the file provider */
+	async_sess_t *sess;
+	
+	/**
+	 * Non-zero if the stream needs sync on fflush(). XXX change
+	 * console semantics so that sync is not needed.
+	 */
+	int need_sync;
+	
+	/** Buffering type */
+	enum _buffer_type btype;
+	
+	/** Buffer */
+	uint8_t *buf;
+	
+	/** Buffer size */
+	size_t buf_size;
+	
+	/** Buffer state */
+	enum _buffer_state buf_state;
+	
+	/** Buffer I/O pointer */
+	uint8_t *buf_head;
+	
+	/** Points to end of occupied space when in read mode. */
+	uint8_t *buf_tail;
+};
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/c/generic/str_error.c
===================================================================
--- uspace/lib/c/generic/str_error.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/str_error.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -33,4 +33,5 @@
  */
 
+#include <errno.h>
 #include <str_error.h>
 #include <stdio.h>
@@ -63,10 +64,25 @@
 static fibril_local char noerr[NOERR_LEN];
 
-const char *str_error(const int errno)
+const char *str_error(const int e)
 {
-	if ((errno <= 0) && (errno >= MIN_ERRNO))
-		return err_desc[-errno];
+	if ((e <= 0) && (e >= MIN_ERRNO))
+		return err_desc[-e];
 	
-	snprintf(noerr, NOERR_LEN, "Unkown error code %d", errno);
+	/* Ad hoc descriptions of error codes interesting for USB. */
+	// FIXME: integrate these as first-class error values
+	switch (e) {
+		case EBADCHECKSUM:
+			return "Bad checksum";
+		case ESTALL:
+			return "Operation stalled";
+		case EAGAIN:
+			return "Resource temporarily unavailable";
+		case EEMPTY:
+			return "Resource is empty";
+		default:
+			break;
+	}
+
+	snprintf(noerr, NOERR_LEN, "Unkown error code %d", e);
 	return noerr;
 }
Index: uspace/lib/c/generic/task.c
===================================================================
--- uspace/lib/c/generic/task.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/task.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -35,7 +35,4 @@
 
 #include <task.h>
-#include <libc.h>
-#include <stdlib.h>
-#include <errno.h>
 #include <loader/loader.h>
 #include <stdarg.h>
@@ -43,5 +40,10 @@
 #include <ipc/ns.h>
 #include <macros.h>
+#include <assert.h>
 #include <async.h>
+#include <errno.h>
+#include <malloc.h>
+#include <libc.h>
+#include "private/ns.h"
 
 task_id_t task_get_id(void)
@@ -68,4 +70,6 @@
 int task_set_name(const char *name)
 {
+	assert(name);
+	
 	return __SYSCALL2(SYS_TASK_SET_NAME, (sysarg_t) name, str_size(name));
 }
@@ -88,23 +92,21 @@
  * loader API. Arguments are passed as a null-terminated array of strings.
  *
- * @param id 	If not NULL, the ID of the task is stored here on success.
- * @param path	Pathname of the binary to execute.
- * @param argv	Command-line arguments.
- *
- * @return	Zero on success or negative error code.
+ * @param id   If not NULL, the ID of the task is stored here on success.
+ * @param path Pathname of the binary to execute.
+ * @param argv Command-line arguments.
+ *
+ * @return Zero on success or negative error code.
+ *
  */
 int task_spawnv(task_id_t *id, const char *path, const char *const args[])
 {
-	loader_t *ldr;
-	task_id_t task_id;
-	int rc;
-
 	/* Connect to a program loader. */
-	ldr = loader_connect();
+	loader_t *ldr = loader_connect();
 	if (ldr == NULL)
 		return EREFUSED;
 	
 	/* Get task ID. */
-	rc = loader_get_task_id(ldr, &task_id);
+	task_id_t task_id;
+	int rc = loader_get_task_id(ldr, &task_id);
 	if (rc != EOK)
 		goto error;
@@ -163,6 +165,4 @@
 	
 	/* Success */
-	free(ldr);
-	
 	if (id != NULL)
 		*id = task_id;
@@ -173,5 +173,4 @@
 	/* Error exit */
 	loader_abort(ldr);
-	free(ldr);
 	return rc;
 }
@@ -182,19 +181,20 @@
  * loader API. Arguments are passed as a null-terminated list of arguments.
  *
- * @param id 	If not NULL, the ID of the task is stored here on success.
- * @param path	Pathname of the binary to execute.
- * @param ...	Command-line arguments.
- *
- * @return	Zero on success or negative error code.
+ * @param id   If not NULL, the ID of the task is stored here on success.
+ * @param path Pathname of the binary to execute.
+ * @param ...  Command-line arguments.
+ *
+ * @return Zero on success or negative error code.
+ *
  */
 int task_spawnl(task_id_t *task_id, const char *path, ...)
 {
+	/* Count the number of arguments. */
+	
 	va_list ap;
-	int rc, cnt;
 	const char *arg;
 	const char **arglist;
-
-	/* Count the number of arguments. */
-	cnt = 0;
+	int cnt = 0;
+	
 	va_start(ap, path);
 	do {
@@ -203,10 +203,10 @@
 	} while (arg != NULL);
 	va_end(ap);
-
+	
 	/* Allocate argument list. */
 	arglist = malloc(cnt * sizeof(const char *));
 	if (arglist == NULL)
 		return ENOMEM;
-
+	
 	/* Fill in arguments. */
 	cnt = 0;
@@ -217,8 +217,8 @@
 	} while (arg != NULL);
 	va_end(ap);
-
+	
 	/* Spawn task. */
-	rc = task_spawnv(task_id, path, arglist);
-
+	int rc = task_spawnv(task_id, path, arglist);
+	
 	/* Free argument list. */
 	free(arglist);
@@ -228,12 +228,16 @@
 int task_wait(task_id_t id, task_exit_t *texit, int *retval)
 {
+	assert(texit);
+	assert(retval);
+	
+	async_exch_t *exch = async_exchange_begin(session_ns);
 	sysarg_t te, rv;
-	int rc;
-
-	rc = (int) async_req_2_2(PHONE_NS, NS_TASK_WAIT, LOWER32(id),
+	int rc = (int) async_req_2_2(exch, NS_TASK_WAIT, LOWER32(id),
 	    UPPER32(id), &te, &rv);
+	async_exchange_end(exch);
+	
 	*texit = te;
 	*retval = rv;
-
+	
 	return rc;
 }
@@ -241,5 +245,9 @@
 int task_retval(int val)
 {
-	return (int) async_req_1_0(PHONE_NS, NS_RETVAL, val);
+	async_exch_t *exch = async_exchange_begin(session_ns);
+	int rc = (int) async_req_1_0(exch, NS_RETVAL, val);
+	async_exchange_end(exch);
+	
+	return rc;
 }
 
Index: uspace/lib/c/generic/time.c
===================================================================
--- uspace/lib/c/generic/time.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/time.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -207,4 +207,10 @@
 }
 
+void udelay(useconds_t time)
+{
+	(void) __SYSCALL1(SYS_THREAD_UDELAY, (sysarg_t) time);
+}
+
+
 /** Wait unconditionally for specified number of seconds
  *
Index: uspace/lib/c/generic/udebug.c
===================================================================
--- uspace/lib/c/generic/udebug.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/udebug.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -35,102 +35,108 @@
 #include <udebug.h>
 #include <sys/types.h>
+#include <kernel/ipc/ipc_methods.h>
 #include <async.h>
 
-int udebug_begin(int phoneid)
+int udebug_begin(async_sess_t *sess)
 {
-	return async_req_1_0(phoneid, IPC_M_DEBUG_ALL, UDEBUG_M_BEGIN);
+	async_exch_t *exch = async_exchange_begin(sess);
+	return async_req_1_0(exch, IPC_M_DEBUG, UDEBUG_M_BEGIN);
 }
 
-int udebug_end(int phoneid)
+int udebug_end(async_sess_t *sess)
 {
-	return async_req_1_0(phoneid, IPC_M_DEBUG_ALL, UDEBUG_M_END);
+	async_exch_t *exch = async_exchange_begin(sess);
+	return async_req_1_0(exch, IPC_M_DEBUG, UDEBUG_M_END);
 }
 
-int udebug_set_evmask(int phoneid, udebug_evmask_t mask)
+int udebug_set_evmask(async_sess_t *sess, udebug_evmask_t mask)
 {
-	return async_req_2_0(phoneid, IPC_M_DEBUG_ALL, UDEBUG_M_SET_EVMASK,
-		mask);
+	async_exch_t *exch = async_exchange_begin(sess);
+	return async_req_2_0(exch, IPC_M_DEBUG, UDEBUG_M_SET_EVMASK, mask);
 }
 
-int udebug_thread_read(int phoneid, void *buffer, size_t n,
-	size_t *copied, size_t *needed)
+int udebug_thread_read(async_sess_t *sess, void *buffer, size_t n,
+    size_t *copied, size_t *needed)
 {
 	sysarg_t a_copied, a_needed;
-	int rc;
-
-	rc = async_req_3_3(phoneid, IPC_M_DEBUG_ALL, UDEBUG_M_THREAD_READ,
-		(sysarg_t)buffer, n, NULL, &a_copied, &a_needed);
-
-	*copied = (size_t)a_copied;
-	*needed = (size_t)a_needed;
-
+	
+	async_exch_t *exch = async_exchange_begin(sess);
+	int rc = async_req_3_3(exch, IPC_M_DEBUG, UDEBUG_M_THREAD_READ,
+	    (sysarg_t) buffer, n, NULL, &a_copied, &a_needed);
+	
+	*copied = (size_t) a_copied;
+	*needed = (size_t) a_needed;
+	
 	return rc;
 }
 
-int udebug_name_read(int phoneid, void *buffer, size_t n,
-	size_t *copied, size_t *needed)
+int udebug_name_read(async_sess_t *sess, void *buffer, size_t n,
+    size_t *copied, size_t *needed)
 {
 	sysarg_t a_copied, a_needed;
-	int rc;
-
-	rc = async_req_3_3(phoneid, IPC_M_DEBUG_ALL, UDEBUG_M_NAME_READ,
-		(sysarg_t)buffer, n, NULL, &a_copied, &a_needed);
-
-	*copied = (size_t)a_copied;
-	*needed = (size_t)a_needed;
-
+	
+	async_exch_t *exch = async_exchange_begin(sess);
+	int rc = async_req_3_3(exch, IPC_M_DEBUG, UDEBUG_M_NAME_READ,
+	    (sysarg_t) buffer, n, NULL, &a_copied, &a_needed);
+	
+	*copied = (size_t) a_copied;
+	*needed = (size_t) a_needed;
+	
 	return rc;
 }
 
-int udebug_areas_read(int phoneid, void *buffer, size_t n,
-	size_t *copied, size_t *needed)
+int udebug_areas_read(async_sess_t *sess, void *buffer, size_t n,
+    size_t *copied, size_t *needed)
 {
 	sysarg_t a_copied, a_needed;
-	int rc;
-
-	rc = async_req_3_3(phoneid, IPC_M_DEBUG_ALL, UDEBUG_M_AREAS_READ,
-		(sysarg_t)buffer, n, NULL, &a_copied, &a_needed);
-
-	*copied = (size_t)a_copied;
-	*needed = (size_t)a_needed;
-
+	
+	async_exch_t *exch = async_exchange_begin(sess);
+	int rc = async_req_3_3(exch, IPC_M_DEBUG, UDEBUG_M_AREAS_READ,
+	    (sysarg_t) buffer, n, NULL, &a_copied, &a_needed);
+	
+	*copied = (size_t) a_copied;
+	*needed = (size_t) a_needed;
+	
 	return rc;
 }
 
-int udebug_mem_read(int phoneid, void *buffer, uintptr_t addr, size_t n)
+int udebug_mem_read(async_sess_t *sess, void *buffer, uintptr_t addr, size_t n)
 {
-	return async_req_4_0(phoneid, IPC_M_DEBUG_ALL, UDEBUG_M_MEM_READ,
-	    (sysarg_t)buffer, addr, n);
+	async_exch_t *exch = async_exchange_begin(sess);
+	return async_req_4_0(exch, IPC_M_DEBUG, UDEBUG_M_MEM_READ,
+	    (sysarg_t) buffer, addr, n);
 }
 
-int udebug_args_read(int phoneid, thash_t tid, sysarg_t *buffer)
+int udebug_args_read(async_sess_t *sess, thash_t tid, sysarg_t *buffer)
 {
-	return async_req_3_0(phoneid, IPC_M_DEBUG_ALL, UDEBUG_M_ARGS_READ,
-	    tid, (sysarg_t)buffer);
+	async_exch_t *exch = async_exchange_begin(sess);
+	return async_req_3_0(exch, IPC_M_DEBUG, UDEBUG_M_ARGS_READ,
+	    tid, (sysarg_t) buffer);
 }
 
-int udebug_regs_read(int phoneid, thash_t tid, void *buffer)
+int udebug_regs_read(async_sess_t *sess, thash_t tid, void *buffer)
 {
-	return async_req_3_0(phoneid, IPC_M_DEBUG_ALL, UDEBUG_M_REGS_READ,
-	    tid, (sysarg_t)buffer);
+	async_exch_t *exch = async_exchange_begin(sess);
+	return async_req_3_0(exch, IPC_M_DEBUG, UDEBUG_M_REGS_READ,
+	    tid, (sysarg_t) buffer);
 }
 
-int udebug_go(int phoneid, thash_t tid, udebug_event_t *ev_type,
+int udebug_go(async_sess_t *sess, thash_t tid, udebug_event_t *ev_type,
     sysarg_t *val0, sysarg_t *val1)
 {
 	sysarg_t a_ev_type;
-	int rc;
-
-	rc =  async_req_2_3(phoneid, IPC_M_DEBUG_ALL, UDEBUG_M_GO,
+	
+	async_exch_t *exch = async_exchange_begin(sess);
+	int rc = async_req_2_3(exch, IPC_M_DEBUG, UDEBUG_M_GO,
 	    tid, &a_ev_type, val0, val1);
-
+	
 	*ev_type = a_ev_type;
 	return rc;
 }
 
-int udebug_stop(int phoneid, thash_t tid)
+int udebug_stop(async_sess_t *sess, thash_t tid)
 {
-	return async_req_2_0(phoneid, IPC_M_DEBUG_ALL, UDEBUG_M_STOP,
-	    tid);
+	async_exch_t *exch = async_exchange_begin(sess);
+	return async_req_2_0(exch, IPC_M_DEBUG, UDEBUG_M_STOP, tid);
 }
 
Index: uspace/lib/c/generic/vfs/vfs.c
===================================================================
--- uspace/lib/c/generic/vfs/vfs.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/generic/vfs/vfs.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -33,6 +33,7 @@
  */
 
+#include <vfs/canonify.h>
 #include <vfs/vfs.h>
-#include <vfs/canonify.h>
+#include <vfs/vfs_sess.h>
 #include <macros.h>
 #include <stdlib.h>
@@ -44,5 +45,5 @@
 #include <sys/types.h>
 #include <ipc/services.h>
-#include <ipc/ns.h>
+#include <ns.h>
 #include <async.h>
 #include <fibril_synch.h>
@@ -54,8 +55,6 @@
 #include <ipc/devmap.h>
 
-static async_sess_t vfs_session;
-
-static FIBRIL_MUTEX_INITIALIZE(vfs_phone_mutex);
-static int vfs_phone = -1;
+static FIBRIL_MUTEX_INITIALIZE(vfs_mutex);
+static async_sess_t *vfs_sess = NULL;
 
 static FIBRIL_MUTEX_INITIALIZE(cwd_mutex);
@@ -65,9 +64,36 @@
 static size_t cwd_size = 0;
 
+/** Start an async exchange on the VFS session.
+ *
+ * @return New exchange.
+ *
+ */
+static async_exch_t *vfs_exchange_begin(void)
+{
+	fibril_mutex_lock(&vfs_mutex);
+	
+	while (vfs_sess == NULL)
+		vfs_sess = service_connect_blocking(EXCHANGE_PARALLEL, SERVICE_VFS,
+		    0, 0);
+	
+	fibril_mutex_unlock(&vfs_mutex);
+	
+	return async_exchange_begin(vfs_sess);
+}
+
+/** Finish an async exchange on the VFS session.
+ *
+ * @param exch Exchange to be finished.
+ *
+ */
+static void vfs_exchange_end(async_exch_t *exch)
+{
+	async_exchange_end(exch);
+}
+
 char *absolutize(const char *path, size_t *retlen)
 {
 	char *ncwd_path;
 	char *ncwd_path_nc;
-	size_t total_size; 
 
 	fibril_mutex_lock(&cwd_mutex);
@@ -78,16 +104,14 @@
 			return NULL;
 		}
-		total_size = cwd_size + 1 + size + 1;
-		ncwd_path_nc = malloc(total_size);
+		ncwd_path_nc = malloc(cwd_size + 1 + size + 1);
 		if (!ncwd_path_nc) {
 			fibril_mutex_unlock(&cwd_mutex);
 			return NULL;
 		}
-		str_cpy(ncwd_path_nc, total_size, cwd_path);
+		str_cpy(ncwd_path_nc, cwd_size + 1 + size + 1, cwd_path);
 		ncwd_path_nc[cwd_size] = '/';
 		ncwd_path_nc[cwd_size + 1] = '\0';
 	} else {
-		total_size = size + 1;
-		ncwd_path_nc = malloc(total_size);
+		ncwd_path_nc = malloc(size + 1);
 		if (!ncwd_path_nc) {
 			fibril_mutex_unlock(&cwd_mutex);
@@ -96,5 +120,5 @@
 		ncwd_path_nc[0] = '\0';
 	}
-	str_append(ncwd_path_nc, total_size, path);
+	str_append(ncwd_path_nc, cwd_size + 1 + size + 1, path);
 	ncwd_path = canonify(ncwd_path_nc, retlen);
 	if (!ncwd_path) {
@@ -118,36 +142,4 @@
 }
 
-/** Connect to VFS service and create session. */
-static void vfs_connect(void)
-{
-	while (vfs_phone < 0)
-		vfs_phone = service_connect_blocking(SERVICE_VFS, 0, 0);
-	
-	async_session_create(&vfs_session, vfs_phone, 0);
-}
-
-/** Start an async exchange on the VFS session.
- *
- * @return		New phone to be used during the exchange.
- */
-static int vfs_exchange_begin(void)
-{
-	fibril_mutex_lock(&vfs_phone_mutex);
-	if (vfs_phone < 0)
-		vfs_connect();
-	fibril_mutex_unlock(&vfs_phone_mutex);
-
-	return async_exchange_begin(&vfs_session);
-}
-
-/** End an async exchange on the VFS session.
- *
- * @param phone		Phone used during the exchange.
- */
-static void vfs_exchange_end(int phone)
-{
-	async_exchange_end(&vfs_session, phone);
-}
-
 int mount(const char *fs_name, const char *mp, const char *fqdn,
     const char *opts, unsigned int flags)
@@ -186,11 +178,11 @@
 	}
 	
-	int vfs_phone = vfs_exchange_begin();
+	async_exch_t *exch = vfs_exchange_begin();
 
 	sysarg_t rc_orig;
-	aid_t req = async_send_2(vfs_phone, VFS_IN_MOUNT, devmap_handle, flags, NULL);
-	sysarg_t rc = async_data_write_start(vfs_phone, (void *) mpa, mpa_size);
-	if (rc != EOK) {
-		vfs_exchange_end(vfs_phone);
+	aid_t req = async_send_2(exch, VFS_IN_MOUNT, devmap_handle, flags, NULL);
+	sysarg_t rc = async_data_write_start(exch, (void *) mpa, mpa_size);
+	if (rc != EOK) {
+		vfs_exchange_end(exch);
 		free(mpa);
 		async_wait_for(req, &rc_orig);
@@ -205,7 +197,7 @@
 	}
 	
-	rc = async_data_write_start(vfs_phone, (void *) opts, str_size(opts));
-	if (rc != EOK) {
-		vfs_exchange_end(vfs_phone);
+	rc = async_data_write_start(exch, (void *) opts, str_size(opts));
+	if (rc != EOK) {
+		vfs_exchange_end(exch);
 		free(mpa);
 		async_wait_for(req, &rc_orig);
@@ -220,7 +212,7 @@
 	}
 	
-	rc = async_data_write_start(vfs_phone, (void *) fs_name, str_size(fs_name));
-	if (rc != EOK) {
-		vfs_exchange_end(vfs_phone);
+	rc = async_data_write_start(exch, (void *) fs_name, str_size(fs_name));
+	if (rc != EOK) {
+		vfs_exchange_end(exch);
 		free(mpa);
 		async_wait_for(req, &rc_orig);
@@ -236,7 +228,7 @@
 	
 	/* Ask VFS whether it likes fs_name. */
-	rc = async_req_0_0(vfs_phone, IPC_M_PING);
-	if (rc != EOK) {
-		vfs_exchange_end(vfs_phone);
+	rc = async_req_0_0(exch, VFS_IN_PING);
+	if (rc != EOK) {
+		vfs_exchange_end(exch);
 		free(mpa);
 		async_wait_for(req, &rc_orig);
@@ -251,5 +243,5 @@
 	}
 	
-	vfs_exchange_end(vfs_phone);
+	vfs_exchange_end(exch);
 	free(mpa);
 	async_wait_for(req, &rc);
@@ -273,10 +265,10 @@
 		return ENOMEM;
 	
-	int vfs_phone = vfs_exchange_begin();
-	
-	req = async_send_0(vfs_phone, VFS_IN_UNMOUNT, NULL);
-	rc = async_data_write_start(vfs_phone, (void *) mpa, mpa_size);
-	if (rc != EOK) {
-		vfs_exchange_end(vfs_phone);
+	async_exch_t *exch = vfs_exchange_begin();
+	
+	req = async_send_0(exch, VFS_IN_UNMOUNT, NULL);
+	rc = async_data_write_start(exch, (void *) mpa, mpa_size);
+	if (rc != EOK) {
+		vfs_exchange_end(exch);
 		free(mpa);
 		async_wait_for(req, &rc_orig);
@@ -288,5 +280,5 @@
 	
 
-	vfs_exchange_end(vfs_phone);
+	vfs_exchange_end(exch);
 	free(mpa);
 	async_wait_for(req, &rc);
@@ -297,12 +289,12 @@
 static int open_internal(const char *abs, size_t abs_size, int lflag, int oflag)
 {
-	int vfs_phone = vfs_exchange_begin();
+	async_exch_t *exch = vfs_exchange_begin();
 	
 	ipc_call_t answer;
-	aid_t req = async_send_3(vfs_phone, VFS_IN_OPEN, lflag, oflag, 0, &answer);
-	sysarg_t rc = async_data_write_start(vfs_phone, abs, abs_size);
-	
-	if (rc != EOK) {
-		vfs_exchange_end(vfs_phone);
+	aid_t req = async_send_3(exch, VFS_IN_OPEN, lflag, oflag, 0, &answer);
+	sysarg_t rc = async_data_write_start(exch, abs, abs_size);
+	
+	if (rc != EOK) {
+		vfs_exchange_end(exch);
 
 		sysarg_t rc_orig;
@@ -315,5 +307,5 @@
 	}
 	
-	vfs_exchange_end(vfs_phone);
+	vfs_exchange_end(exch);
 	async_wait_for(req, &rc);
 	
@@ -339,11 +331,11 @@
 int open_node(fdi_node_t *node, int oflag)
 {
-	int vfs_phone = vfs_exchange_begin();
+	async_exch_t *exch = vfs_exchange_begin();
 	
 	ipc_call_t answer;
-	aid_t req = async_send_4(vfs_phone, VFS_IN_OPEN_NODE, node->fs_handle,
+	aid_t req = async_send_4(exch, VFS_IN_OPEN_NODE, node->fs_handle,
 	    node->devmap_handle, node->index, oflag, &answer);
 	
-	vfs_exchange_end(vfs_phone);
+	vfs_exchange_end(exch);
 
 	sysarg_t rc;
@@ -360,11 +352,9 @@
 	sysarg_t rc;
 	
-	int vfs_phone = vfs_exchange_begin();
-	
-	rc = async_req_1_0(vfs_phone, VFS_IN_CLOSE, fildes);
-	
-	vfs_exchange_end(vfs_phone);
-	
-	return (int)rc;
+	async_exch_t *exch = vfs_exchange_begin();
+	rc = async_req_1_0(exch, VFS_IN_CLOSE, fildes);
+	vfs_exchange_end(exch);
+	
+	return (int) rc;
 }
 
@@ -374,12 +364,11 @@
 	ipc_call_t answer;
 	aid_t req;
-
-	int vfs_phone = vfs_exchange_begin();
-	
-	req = async_send_1(vfs_phone, VFS_IN_READ, fildes, &answer);
-	rc = async_data_read_start_generic(vfs_phone, (void *) buf, nbyte,
-	    IPC_XF_RESTRICT);
-	if (rc != EOK) {
-		vfs_exchange_end(vfs_phone);
+	
+	async_exch_t *exch = vfs_exchange_begin();
+	
+	req = async_send_1(exch, VFS_IN_READ, fildes, &answer);
+	rc = async_data_read_start(exch, (void *)buf, nbyte);
+	if (rc != EOK) {
+		vfs_exchange_end(exch);
 
 		sysarg_t rc_orig;
@@ -391,5 +380,5 @@
 			return (ssize_t) rc_orig;
 	}
-	vfs_exchange_end(vfs_phone);
+	vfs_exchange_end(exch);
 	async_wait_for(req, &rc);
 	if (rc == EOK)
@@ -404,12 +393,11 @@
 	ipc_call_t answer;
 	aid_t req;
-
-	int vfs_phone = vfs_exchange_begin();
-	
-	req = async_send_1(vfs_phone, VFS_IN_WRITE, fildes, &answer);
-	rc = async_data_write_start_generic(vfs_phone, (void *) buf, nbyte,
-	    IPC_XF_RESTRICT);
-	if (rc != EOK) {
-		vfs_exchange_end(vfs_phone);
+	
+	async_exch_t *exch = vfs_exchange_begin();
+	
+	req = async_send_1(exch, VFS_IN_WRITE, fildes, &answer);
+	rc = async_data_write_start(exch, (void *)buf, nbyte);
+	if (rc != EOK) {
+		vfs_exchange_end(exch);
 
 		sysarg_t rc_orig;
@@ -421,5 +409,5 @@
 			return (ssize_t) rc_orig;
 	}
-	vfs_exchange_end(vfs_phone);
+	vfs_exchange_end(exch);
 	async_wait_for(req, &rc);
 	if (rc == EOK)
@@ -431,9 +419,7 @@
 int fsync(int fildes)
 {
-	int vfs_phone = vfs_exchange_begin();
-	
-	sysarg_t rc = async_req_1_0(vfs_phone, VFS_IN_SYNC, fildes);
-	
-	vfs_exchange_end(vfs_phone);
+	async_exch_t *exch = vfs_exchange_begin();
+	sysarg_t rc = async_req_1_0(exch, VFS_IN_SYNC, fildes);
+	vfs_exchange_end(exch);
 	
 	return (int) rc;
@@ -442,13 +428,13 @@
 off64_t lseek(int fildes, off64_t offset, int whence)
 {
-	int vfs_phone = vfs_exchange_begin();
+	async_exch_t *exch = vfs_exchange_begin();
 	
 	sysarg_t newoff_lo;
 	sysarg_t newoff_hi;
-	sysarg_t rc = async_req_4_2(vfs_phone, VFS_IN_SEEK, fildes,
+	sysarg_t rc = async_req_4_2(exch, VFS_IN_SEEK, fildes,
 	    LOWER32(offset), UPPER32(offset), whence,
 	    &newoff_lo, &newoff_hi);
 	
-	vfs_exchange_end(vfs_phone);
+	vfs_exchange_end(exch);
 	
 	if (rc != EOK)
@@ -462,9 +448,8 @@
 	sysarg_t rc;
 	
-	int vfs_phone = vfs_exchange_begin();
-	
-	rc = async_req_3_0(vfs_phone, VFS_IN_TRUNCATE, fildes,
+	async_exch_t *exch = vfs_exchange_begin();
+	rc = async_req_3_0(exch, VFS_IN_TRUNCATE, fildes,
 	    LOWER32(length), UPPER32(length));
-	vfs_exchange_end(vfs_phone);
+	vfs_exchange_end(exch);
 	
 	return (int) rc;
@@ -475,11 +460,11 @@
 	sysarg_t rc;
 	aid_t req;
-
-	int vfs_phone = vfs_exchange_begin();
-	
-	req = async_send_1(vfs_phone, VFS_IN_FSTAT, fildes, NULL);
-	rc = async_data_read_start(vfs_phone, (void *) stat, sizeof(struct stat));
-	if (rc != EOK) {
-		vfs_exchange_end(vfs_phone);
+	
+	async_exch_t *exch = vfs_exchange_begin();
+	
+	req = async_send_1(exch, VFS_IN_FSTAT, fildes, NULL);
+	rc = async_data_read_start(exch, (void *) stat, sizeof(struct stat));
+	if (rc != EOK) {
+		vfs_exchange_end(exch);
 
 		sysarg_t rc_orig;
@@ -491,5 +476,5 @@
 			return (ssize_t) rc_orig;
 	}
-	vfs_exchange_end(vfs_phone);
+	vfs_exchange_end(exch);
 	async_wait_for(req, &rc);
 
@@ -508,10 +493,10 @@
 		return ENOMEM;
 	
-	int vfs_phone = vfs_exchange_begin();
-	
-	req = async_send_0(vfs_phone, VFS_IN_STAT, NULL);
-	rc = async_data_write_start(vfs_phone, pa, pa_size);
-	if (rc != EOK) {
-		vfs_exchange_end(vfs_phone);
+	async_exch_t *exch = vfs_exchange_begin();
+	
+	req = async_send_0(exch, VFS_IN_STAT, NULL);
+	rc = async_data_write_start(exch, pa, pa_size);
+	if (rc != EOK) {
+		vfs_exchange_end(exch);
 		free(pa);
 		async_wait_for(req, &rc_orig);
@@ -521,7 +506,7 @@
 			return (int) rc_orig;
 	}
-	rc = async_data_read_start(vfs_phone, stat, sizeof(struct stat));
-	if (rc != EOK) {
-		vfs_exchange_end(vfs_phone);
+	rc = async_data_read_start(exch, stat, sizeof(struct stat));
+	if (rc != EOK) {
+		vfs_exchange_end(exch);
 		free(pa);
 		async_wait_for(req, &rc_orig);
@@ -531,5 +516,5 @@
 			return (int) rc_orig;
 	}
-	vfs_exchange_end(vfs_phone);
+	vfs_exchange_end(exch);
 	free(pa);
 	async_wait_for(req, &rc);
@@ -592,10 +577,10 @@
 		return ENOMEM;
 	
-	int vfs_phone = vfs_exchange_begin();
-	
-	req = async_send_1(vfs_phone, VFS_IN_MKDIR, mode, NULL);
-	rc = async_data_write_start(vfs_phone, pa, pa_size);
-	if (rc != EOK) {
-		vfs_exchange_end(vfs_phone);
+	async_exch_t *exch = vfs_exchange_begin();
+	
+	req = async_send_1(exch, VFS_IN_MKDIR, mode, NULL);
+	rc = async_data_write_start(exch, pa, pa_size);
+	if (rc != EOK) {
+		vfs_exchange_end(exch);
 		free(pa);
 
@@ -608,5 +593,5 @@
 			return (int) rc_orig;
 	}
-	vfs_exchange_end(vfs_phone);
+	vfs_exchange_end(exch);
 	free(pa);
 	async_wait_for(req, &rc);
@@ -623,11 +608,11 @@
 	if (!pa)
 		return ENOMEM;
-
-	int vfs_phone = vfs_exchange_begin();
-	
-	req = async_send_0(vfs_phone, VFS_IN_UNLINK, NULL);
-	rc = async_data_write_start(vfs_phone, pa, pa_size);
-	if (rc != EOK) {
-		vfs_exchange_end(vfs_phone);
+	
+	async_exch_t *exch = vfs_exchange_begin();
+	
+	req = async_send_0(exch, VFS_IN_UNLINK, NULL);
+	rc = async_data_write_start(exch, pa, pa_size);
+	if (rc != EOK) {
+		vfs_exchange_end(exch);
 		free(pa);
 
@@ -640,5 +625,5 @@
 			return (int) rc_orig;
 	}
-	vfs_exchange_end(vfs_phone);
+	vfs_exchange_end(exch);
 	free(pa);
 	async_wait_for(req, &rc);
@@ -673,11 +658,11 @@
 		return ENOMEM;
 	}
-
-	int vfs_phone = vfs_exchange_begin();
-	
-	req = async_send_0(vfs_phone, VFS_IN_RENAME, NULL);
-	rc = async_data_write_start(vfs_phone, olda, olda_size);
-	if (rc != EOK) {
-		vfs_exchange_end(vfs_phone);
+	
+	async_exch_t *exch = vfs_exchange_begin();
+	
+	req = async_send_0(exch, VFS_IN_RENAME, NULL);
+	rc = async_data_write_start(exch, olda, olda_size);
+	if (rc != EOK) {
+		vfs_exchange_end(exch);
 		free(olda);
 		free(newa);
@@ -688,7 +673,7 @@
 			return (int) rc_orig;
 	}
-	rc = async_data_write_start(vfs_phone, newa, newa_size);
-	if (rc != EOK) {
-		vfs_exchange_end(vfs_phone);
+	rc = async_data_write_start(exch, newa, newa_size);
+	if (rc != EOK) {
+		vfs_exchange_end(exch);
 		free(olda);
 		free(newa);
@@ -699,5 +684,5 @@
 			return (int) rc_orig;
 	}
-	vfs_exchange_end(vfs_phone);
+	vfs_exchange_end(exch);
 	free(olda);
 	free(newa);
@@ -755,16 +740,19 @@
 }
 
-int fd_phone(int fildes)
+async_sess_t *fd_session(exch_mgmt_t mgmt, int fildes)
 {
 	struct stat stat;
-	
 	int rc = fstat(fildes, &stat);
-	if (rc != 0)
-		return rc;
-	
-	if (!stat.device)
-		return -1;
-	
-	return devmap_device_connect(stat.device, 0);
+	if (rc != 0) {
+		errno = rc;
+		return NULL;
+	}
+	
+	if (!stat.device) {
+		errno = ENOENT;
+		return NULL;
+	}
+	
+	return devmap_device_connect(mgmt, stat.device, 0);
 }
 
@@ -772,7 +760,5 @@
 {
 	struct stat stat;
-	int rc;
-
-	rc = fstat(fildes, &stat);
+	int rc = fstat(fildes, &stat);
 	
 	if (rc == EOK) {
@@ -787,10 +773,10 @@
 int dup2(int oldfd, int newfd)
 {
-	int vfs_phone = vfs_exchange_begin();
+	async_exch_t *exch = vfs_exchange_begin();
 	
 	sysarg_t ret;
-	sysarg_t rc = async_req_2_1(vfs_phone, VFS_IN_DUP, oldfd, newfd, &ret);
-	
-	vfs_exchange_end(vfs_phone);
+	sysarg_t rc = async_req_2_1(exch, VFS_IN_DUP, oldfd, newfd, &ret);
+	
+	vfs_exchange_end(exch);
 	
 	if (rc == EOK)
Index: uspace/lib/c/include/adt/hash_table.h
===================================================================
--- uspace/lib/c/include/adt/hash_table.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/adt/hash_table.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -38,4 +38,5 @@
 #include <adt/list.h>
 #include <unistd.h>
+#include <bool.h>
 
 typedef unsigned long hash_count_t;
@@ -83,5 +84,5 @@
     list_get_instance((item), type, member)
 
-extern int hash_table_create(hash_table_t *, hash_count_t, hash_count_t,
+extern bool hash_table_create(hash_table_t *, hash_count_t, hash_count_t,
     hash_table_operations_t *);
 extern void hash_table_insert(hash_table_t *, unsigned long [], link_t *);
Index: uspace/lib/c/include/as.h
===================================================================
--- uspace/lib/c/include/as.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/as.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -60,4 +60,5 @@
 extern void *set_maxheapsize(size_t);
 extern void *as_get_mappable_page(size_t);
+extern int as_get_physical_mapping(void *, uintptr_t *);
 
 #endif
Index: uspace/lib/c/include/async.h
===================================================================
--- uspace/lib/c/include/async.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/async.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -41,6 +41,6 @@
 
 #include <ipc/common.h>
-#include <async_sess.h>
 #include <fibril.h>
+#include <fibril_synch.h>
 #include <sys/time.h>
 #include <atomic.h>
@@ -55,4 +55,76 @@
 typedef void (*async_client_conn_t)(ipc_callid_t, ipc_call_t *);
 
+/** Exchange management style
+ *
+ */
+typedef enum {
+	/** No explicit exchange management
+	 *
+	 * Suitable for protocols which use a single
+	 * IPC message per exchange only.
+	 *
+	 */
+	EXCHANGE_ATOMIC = 0,
+	
+	/** Exchange management via phone cloning
+	 *
+	 * Suitable for servers which support client
+	 * data tracking by task hashes and do not
+	 * mind cloned phones.
+	 *
+	 */
+	EXCHANGE_PARALLEL,
+	
+	/** Exchange management via mutual exclusion
+	 *
+	 * Suitable for any kind of client/server communication,
+	 * but can limit parallelism.
+	 *
+	 */
+	EXCHANGE_SERIALIZE
+} exch_mgmt_t;
+
+/** Session data */
+typedef struct {
+	/** List of inactive exchanges */
+	link_t exch_list;
+	
+	/** Exchange management style */
+	exch_mgmt_t mgmt;
+	
+	/** Session identification */
+	int phone;
+	
+	/** First clone connection argument */
+	sysarg_t arg1;
+	
+	/** Second clone connection argument */
+	sysarg_t arg2;
+	
+	/** Third clone connection argument */
+	sysarg_t arg3;
+	
+	/** Exchange mutex */
+	fibril_mutex_t mutex;
+	
+	/** Number of opened exchanges */
+	atomic_t refcnt;
+} async_sess_t;
+
+/** Exchange data */
+typedef struct {
+	/** Link into list of inactive exchanges */
+	link_t sess_link;
+	
+	/** Link into global list of inactive exchanges */
+	link_t global_link;
+	
+	/** Session pointer */
+	async_sess_t *sess;
+	
+	/** Exchange identification */
+	int phone;
+} async_exch_t;
+
 extern atomic_t threads_in_ipc_wait;
 
@@ -68,32 +140,32 @@
  * User-friendly wrappers for async_send_fast() and async_send_slow(). The
  * macros are in the form async_send_m(), where m denotes the number of payload
- * arguments.  Each macros chooses between the fast and the slow version based
+ * arguments. Each macros chooses between the fast and the slow version based
  * on m.
  */
 
-#define async_send_0(phoneid, method, dataptr) \
-	async_send_fast((phoneid), (method), 0, 0, 0, 0, (dataptr))
-#define async_send_1(phoneid, method, arg1, dataptr) \
-	async_send_fast((phoneid), (method), (arg1), 0, 0, 0, (dataptr))
-#define async_send_2(phoneid, method, arg1, arg2, dataptr) \
-	async_send_fast((phoneid), (method), (arg1), (arg2), 0, 0, (dataptr))
-#define async_send_3(phoneid, method, arg1, arg2, arg3, dataptr) \
-	async_send_fast((phoneid), (method), (arg1), (arg2), (arg3), 0, (dataptr))
-#define async_send_4(phoneid, method, arg1, arg2, arg3, arg4, dataptr) \
-	async_send_fast((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
-	    (dataptr))
-#define async_send_5(phoneid, method, arg1, arg2, arg3, arg4, arg5, dataptr) \
-	async_send_slow((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
-	    (arg5), (dataptr))
-
-extern aid_t async_send_fast(int, sysarg_t, sysarg_t, sysarg_t, sysarg_t,
-    sysarg_t, ipc_call_t *);
-extern aid_t async_send_slow(int, sysarg_t, sysarg_t, sysarg_t, sysarg_t,
+#define async_send_0(exch, method, dataptr) \
+	async_send_fast(exch, method, 0, 0, 0, 0, dataptr)
+#define async_send_1(exch, method, arg1, dataptr) \
+	async_send_fast(exch, method, arg1, 0, 0, 0, dataptr)
+#define async_send_2(exch, method, arg1, arg2, dataptr) \
+	async_send_fast(exch, method, arg1, arg2, 0, 0, dataptr)
+#define async_send_3(exch, method, arg1, arg2, arg3, dataptr) \
+	async_send_fast(exch, method, arg1, arg2, arg3, 0, dataptr)
+#define async_send_4(exch, method, arg1, arg2, arg3, arg4, dataptr) \
+	async_send_fast(exch, method, arg1, arg2, arg3, arg4, dataptr)
+#define async_send_5(exch, method, arg1, arg2, arg3, arg4, arg5, dataptr) \
+	async_send_slow(exch, method, arg1, arg2, arg3, arg4, arg5, dataptr)
+
+extern aid_t async_send_fast(async_exch_t *, sysarg_t, sysarg_t, sysarg_t,
     sysarg_t, sysarg_t, ipc_call_t *);
+extern aid_t async_send_slow(async_exch_t *, sysarg_t, sysarg_t, sysarg_t,
+    sysarg_t, sysarg_t, sysarg_t, ipc_call_t *);
+
 extern void async_wait_for(aid_t, sysarg_t *);
 extern int async_wait_timeout(aid_t, sysarg_t *, suseconds_t);
 
 extern fid_t async_new_connection(sysarg_t, sysarg_t, ipc_callid_t,
-    ipc_call_t *, void (*)(ipc_callid_t, ipc_call_t *));
+    ipc_call_t *, async_client_conn_t);
+
 extern void async_usleep(suseconds_t);
 extern void async_create_manager(void);
@@ -102,6 +174,5 @@
 extern void async_set_client_data_constructor(async_client_data_ctor_t);
 extern void async_set_client_data_destructor(async_client_data_dtor_t);
-
-extern void *async_client_data_get(void);
+extern void *async_get_client_data(void);
 
 extern void async_set_client_connection(async_client_conn_t);
@@ -112,11 +183,12 @@
  */
 
-extern void async_msg_0(int, sysarg_t);
-extern void async_msg_1(int, sysarg_t, sysarg_t);
-extern void async_msg_2(int, sysarg_t, sysarg_t, sysarg_t);
-extern void async_msg_3(int, sysarg_t, sysarg_t, sysarg_t, sysarg_t);
-extern void async_msg_4(int, sysarg_t, sysarg_t, sysarg_t, sysarg_t, sysarg_t);
-extern void async_msg_5(int, sysarg_t, sysarg_t, sysarg_t, sysarg_t, sysarg_t,
+extern void async_msg_0(async_exch_t *, sysarg_t);
+extern void async_msg_1(async_exch_t *, sysarg_t, sysarg_t);
+extern void async_msg_2(async_exch_t *, sysarg_t, sysarg_t, sysarg_t);
+extern void async_msg_3(async_exch_t *, sysarg_t, sysarg_t, sysarg_t, sysarg_t);
+extern void async_msg_4(async_exch_t *, sysarg_t, sysarg_t, sysarg_t, sysarg_t,
     sysarg_t);
+extern void async_msg_5(async_exch_t *, sysarg_t, sysarg_t, sysarg_t, sysarg_t,
+    sysarg_t, sysarg_t);
 
 /*
@@ -138,8 +210,8 @@
  */
 
-extern int async_forward_fast(ipc_callid_t, int, sysarg_t, sysarg_t, sysarg_t,
-    unsigned int);
-extern int async_forward_slow(ipc_callid_t, int, sysarg_t, sysarg_t, sysarg_t,
-    sysarg_t, sysarg_t, sysarg_t, unsigned int);
+extern int async_forward_fast(ipc_callid_t, async_exch_t *, sysarg_t, sysarg_t,
+    sysarg_t, unsigned int);
+extern int async_forward_slow(ipc_callid_t, async_exch_t *, sysarg_t, sysarg_t,
+    sysarg_t, sysarg_t, sysarg_t, sysarg_t, unsigned int);
 
 /*
@@ -150,161 +222,160 @@
  */
 
-#define async_req_0_0(phoneid, method) \
-	async_req_fast((phoneid), (method), 0, 0, 0, 0, NULL, NULL, NULL, NULL, \
-	    NULL)
-#define async_req_0_1(phoneid, method, r1) \
-	async_req_fast((phoneid), (method), 0, 0, 0, 0, (r1), NULL, NULL, NULL, \
-	    NULL)
-#define async_req_0_2(phoneid, method, r1, r2) \
-	async_req_fast((phoneid), (method), 0, 0, 0, 0, (r1), (r2), NULL, NULL, \
-	    NULL)
-#define async_req_0_3(phoneid, method, r1, r2, r3) \
-	async_req_fast((phoneid), (method), 0, 0, 0, 0, (r1), (r2), (r3), NULL, \
-	    NULL)
-#define async_req_0_4(phoneid, method, r1, r2, r3, r4) \
-	async_req_fast((phoneid), (method), 0, 0, 0, 0, (r1), (r2), (r3), (r4), \
-	    NULL)
-#define async_req_0_5(phoneid, method, r1, r2, r3, r4, r5) \
-	async_req_fast((phoneid), (method), 0, 0, 0, 0, (r1), (r2), (r3), (r4), \
-	    (r5))
-#define async_req_1_0(phoneid, method, arg1) \
-	async_req_fast((phoneid), (method), (arg1), 0, 0, 0, NULL, NULL, NULL, \
-	    NULL, NULL)
-#define async_req_1_1(phoneid, method, arg1, rc1) \
-	async_req_fast((phoneid), (method), (arg1), 0, 0, 0, (rc1), NULL, NULL, \
-	    NULL, NULL)
-#define async_req_1_2(phoneid, method, arg1, rc1, rc2) \
-	async_req_fast((phoneid), (method), (arg1), 0, 0, 0, (rc1), (rc2), NULL, \
-	    NULL, NULL)
-#define async_req_1_3(phoneid, method, arg1, rc1, rc2, rc3) \
-	async_req_fast((phoneid), (method), (arg1), 0, 0, 0, (rc1), (rc2), (rc3), \
-	    NULL, NULL)
-#define async_req_1_4(phoneid, method, arg1, rc1, rc2, rc3, rc4) \
-	async_req_fast((phoneid), (method), (arg1), 0, 0, 0, (rc1), (rc2), (rc3), \
-	    (rc4), NULL)
-#define async_req_1_5(phoneid, method, arg1, rc1, rc2, rc3, rc4, rc5) \
-	async_req_fast((phoneid), (method), (arg1), 0, 0, 0, (rc1), (rc2), (rc3), \
-	    (rc4), (rc5))
-#define async_req_2_0(phoneid, method, arg1, arg2) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), 0, 0, NULL, NULL, \
+#define async_req_0_0(exch, method) \
+	async_req_fast(exch, method, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)
+#define async_req_0_1(exch, method, r1) \
+	async_req_fast(exch, method, 0, 0, 0, 0, r1, NULL, NULL, NULL, NULL)
+#define async_req_0_2(exch, method, r1, r2) \
+	async_req_fast(exch, method, 0, 0, 0, 0, r1, r2, NULL, NULL, NULL)
+#define async_req_0_3(exch, method, r1, r2, r3) \
+	async_req_fast(exch, method, 0, 0, 0, 0, r1, r2, r3, NULL, NULL)
+#define async_req_0_4(exch, method, r1, r2, r3, r4) \
+	async_req_fast(exch, method, 0, 0, 0, 0, r1, r2, r3, r4, NULL)
+#define async_req_0_5(exch, method, r1, r2, r3, r4, r5) \
+	async_req_fast(exch, method, 0, 0, 0, 0, r1, r2, r3, r4, r5)
+
+#define async_req_1_0(exch, method, arg1) \
+	async_req_fast(exch, method, arg1, 0, 0, 0, NULL, NULL, NULL, NULL, \
+	    NULL)
+#define async_req_1_1(exch, method, arg1, rc1) \
+	async_req_fast(exch, method, arg1, 0, 0, 0, rc1, NULL, NULL, NULL, \
+	    NULL)
+#define async_req_1_2(exch, method, arg1, rc1, rc2) \
+	async_req_fast(exch, method, arg1, 0, 0, 0, rc1, rc2, NULL, NULL, \
+	    NULL)
+#define async_req_1_3(exch, method, arg1, rc1, rc2, rc3) \
+	async_req_fast(exch, method, arg1, 0, 0, 0, rc1, rc2, rc3, NULL, \
+	    NULL)
+#define async_req_1_4(exch, method, arg1, rc1, rc2, rc3, rc4) \
+	async_req_fast(exch, method, arg1, 0, 0, 0, rc1, rc2, rc3, rc4, \
+	    NULL)
+#define async_req_1_5(exch, method, arg1, rc1, rc2, rc3, rc4, rc5) \
+	async_req_fast(exch, method, arg1, 0, 0, 0, rc1, rc2, rc3, rc4, \
+	    rc5)
+
+#define async_req_2_0(exch, method, arg1, arg2) \
+	async_req_fast(exch, method, arg1, arg2, 0, 0, NULL, NULL, NULL, \
+	    NULL, NULL)
+#define async_req_2_1(exch, method, arg1, arg2, rc1) \
+	async_req_fast(exch, method, arg1, arg2, 0, 0, rc1, NULL, NULL, \
+	    NULL, NULL)
+#define async_req_2_2(exch, method, arg1, arg2, rc1, rc2) \
+	async_req_fast(exch, method, arg1, arg2, 0, 0, rc1, rc2, NULL, NULL, \
+	    NULL)
+#define async_req_2_3(exch, method, arg1, arg2, rc1, rc2, rc3) \
+	async_req_fast(exch, method, arg1, arg2, 0, 0, rc1, rc2, rc3, NULL, \
+	    NULL)
+#define async_req_2_4(exch, method, arg1, arg2, rc1, rc2, rc3, rc4) \
+	async_req_fast(exch, method, arg1, arg2, 0, 0, rc1, rc2, rc3, rc4, \
+	    NULL)
+#define async_req_2_5(exch, method, arg1, arg2, rc1, rc2, rc3, rc4, rc5) \
+	async_req_fast(exch, method, arg1, arg2, 0, 0, rc1, rc2, rc3, rc4, \
+	    rc5)
+
+#define async_req_3_0(exch, method, arg1, arg2, arg3) \
+	async_req_fast(exch, method, arg1, arg2, arg3, 0, NULL, NULL, NULL, \
+	    NULL, NULL)
+#define async_req_3_1(exch, method, arg1, arg2, arg3, rc1) \
+	async_req_fast(exch, method, arg1, arg2, arg3, 0, rc1, NULL, NULL, \
+	    NULL, NULL)
+#define async_req_3_2(exch, method, arg1, arg2, arg3, rc1, rc2) \
+	async_req_fast(exch, method, arg1, arg2, arg3, 0, rc1, rc2, NULL, \
+	    NULL, NULL)
+#define async_req_3_3(exch, method, arg1, arg2, arg3, rc1, rc2, rc3) \
+	async_req_fast(exch, method, arg1, arg2, arg3, 0, rc1, rc2, rc3, \
+	    NULL, NULL)
+#define async_req_3_4(exch, method, arg1, arg2, arg3, rc1, rc2, rc3, rc4) \
+	async_req_fast(exch, method, arg1, arg2, arg3, 0, rc1, rc2, rc3, \
+	    rc4, NULL)
+#define async_req_3_5(exch, method, arg1, arg2, arg3, rc1, rc2, rc3, rc4, \
+    rc5) \
+	async_req_fast(exch, method, arg1, arg2, arg3, 0, rc1, rc2, rc3, \
+	    rc4, rc5)
+
+#define async_req_4_0(exch, method, arg1, arg2, arg3, arg4) \
+	async_req_fast(exch, method, arg1, arg2, arg3, arg4, NULL, NULL, \
 	    NULL, NULL, NULL)
-#define async_req_2_1(phoneid, method, arg1, arg2, rc1) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), 0, 0, (rc1), NULL, \
+#define async_req_4_1(exch, method, arg1, arg2, arg3, arg4, rc1) \
+	async_req_fast(exch, method, arg1, arg2, arg3, arg4, rc1, NULL, \
 	    NULL, NULL, NULL)
-#define async_req_2_2(phoneid, method, arg1, arg2, rc1, rc2) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), 0, 0, (rc1), (rc2), \
+#define async_req_4_2(exch, method, arg1, arg2, arg3, arg4, rc1, rc2) \
+	async_req_fast(exch, method, arg1, arg2, arg3, arg4, rc1, rc2, NULL, \
+	    NULL, NULL)
+#define async_req_4_3(exch, method, arg1, arg2, arg3, arg4, rc1, rc2, rc3) \
+	async_req_fast(exch, method, arg1, arg2, arg3, arg4, rc1, rc2, rc3, \
+	    NULL, NULL)
+#define async_req_4_4(exch, method, arg1, arg2, arg3, arg4, rc1, rc2, rc3, \
+    rc4) \
+	async_req_fast(exch, method, arg1, arg2, arg3, arg4, rc1, rc2, rc3, \
+	    rc4, NULL)
+#define async_req_4_5(exch, method, arg1, arg2, arg3, arg4, rc1, rc2, rc3, \
+    rc4, rc5) \
+	async_req_fast(exch, method, arg1, arg2, arg3, arg4, rc1, rc2, rc3, \
+	    rc4, rc5)
+
+#define async_req_5_0(exch, method, arg1, arg2, arg3, arg4, arg5) \
+	async_req_slow(exch, method, arg1, arg2, arg3, arg4, arg5, NULL, \
+	    NULL, NULL, NULL, NULL)
+#define async_req_5_1(exch, method, arg1, arg2, arg3, arg4, arg5, rc1) \
+	async_req_slow(exch, method, arg1, arg2, arg3, arg4, arg5, rc1, \
+	    NULL, NULL, NULL, NULL)
+#define async_req_5_2(exch, method, arg1, arg2, arg3, arg4, arg5, rc1, rc2) \
+	async_req_slow(exch, method, arg1, arg2, arg3, arg4, arg5, rc1, rc2, \
 	    NULL, NULL, NULL)
-#define async_req_2_3(phoneid, method, arg1, arg2, rc1, rc2, rc3) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), 0, 0, (rc1), (rc2), \
-	    (rc3), NULL, NULL)
-#define async_req_2_4(phoneid, method, arg1, arg2, rc1, rc2, rc3, rc4) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), 0, 0, (rc1), (rc2), \
-	    (rc3), (rc4), NULL)
-#define async_req_2_5(phoneid, method, arg1, arg2, rc1, rc2, rc3, rc4, rc5) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), 0, 0, (rc1), (rc2), \
-	    (rc3), (rc4), (rc5))
-#define async_req_3_0(phoneid, method, arg1, arg2, arg3) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), (arg3), 0, NULL, NULL, \
-	    NULL, NULL, NULL)
-#define async_req_3_1(phoneid, method, arg1, arg2, arg3, rc1) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), (arg3), 0, (rc1), \
-	    NULL, NULL, NULL, NULL)
-#define async_req_3_2(phoneid, method, arg1, arg2, arg3, rc1, rc2) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), (arg3), 0, (rc1), \
-	    (rc2), NULL, NULL, NULL)
-#define async_req_3_3(phoneid, method, arg1, arg2, arg3, rc1, rc2, rc3) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), (arg3), 0, (rc1), \
-	    (rc2), (rc3), NULL, NULL)
-#define async_req_3_4(phoneid, method, arg1, arg2, arg3, rc1, rc2, rc3, rc4) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), (arg3), 0, (rc1), \
-	    (rc2), (rc3), (rc4), NULL)
-#define async_req_3_5(phoneid, method, arg1, arg2, arg3, rc1, rc2, rc3, rc4, \
-    rc5) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), (arg3), 0, (rc1), \
-	    (rc2), (rc3), (rc4), (rc5))
-#define async_req_4_0(phoneid, method, arg1, arg2, arg3, arg4) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), (arg3), (arg4), NULL, \
-	    NULL, NULL, NULL, NULL)
-#define async_req_4_1(phoneid, method, arg1, arg2, arg3, arg4, rc1) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), (arg3), (arg4), (rc1), \
-	    NULL, NULL, NULL, NULL)
-#define async_req_4_2(phoneid, method, arg1, arg2, arg3, arg4, rc1, rc2) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), (arg3), (arg4), (rc1), \
-	    (rc2), NULL, NULL, NULL)
-#define async_req_4_3(phoneid, method, arg1, arg2, arg3, arg4, rc1, rc2, rc3) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), (arg3), (arg4), (rc1), \
-	    (rc2), (rc3), NULL, NULL)
-#define async_req_4_4(phoneid, method, arg1, arg2, arg3, arg4, rc1, rc2, rc3, \
-    rc4) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
-	    (rc1), (rc2), (rc3), (rc4), NULL)
-#define async_req_4_5(phoneid, method, arg1, arg2, arg3, arg4, rc1, rc2, rc3, \
-    rc4, rc5) \
-	async_req_fast((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
-	    (rc1), (rc2), (rc3), (rc4), (rc5))
-#define async_req_5_0(phoneid, method, arg1, arg2, arg3, arg4, arg5) \
-	async_req_slow((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
-	    (arg5), NULL, NULL, NULL, NULL, NULL)
-#define async_req_5_1(phoneid, method, arg1, arg2, arg3, arg4, arg5, rc1) \
-	async_req_slow((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
-	    (arg5), (rc1), NULL, NULL, NULL, NULL)
-#define async_req_5_2(phoneid, method, arg1, arg2, arg3, arg4, arg5, rc1, rc2) \
-	async_req_slow((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
-	    (arg5), (rc1), (rc2), NULL, NULL, NULL)
-#define async_req_5_3(phoneid, method, arg1, arg2, arg3, arg4, arg5, rc1, rc2, \
+#define async_req_5_3(exch, method, arg1, arg2, arg3, arg4, arg5, rc1, rc2, \
     rc3) \
-	async_req_slow((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
-	    (arg5), (rc1), (rc2), (rc3), NULL, NULL)
-#define async_req_5_4(phoneid, method, arg1, arg2, arg3, arg4, arg5, rc1, rc2, \
+	async_req_slow(exch, method, arg1, arg2, arg3, arg4, arg5, rc1, rc2, \
+	    rc3, NULL, NULL)
+#define async_req_5_4(exch, method, arg1, arg2, arg3, arg4, arg5, rc1, rc2, \
     rc3, rc4) \
-	async_req_slow((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
-	    (arg5), (rc1), (rc2), (rc3), (rc4), NULL)
-#define async_req_5_5(phoneid, method, arg1, arg2, arg3, arg4, arg5, rc1, rc2, \
+	async_req_slow(exch, method, arg1, arg2, arg3, arg4, arg5, rc1, rc2, \
+	    rc3, rc4, NULL)
+#define async_req_5_5(exch, method, arg1, arg2, arg3, arg4, arg5, rc1, rc2, \
     rc3, rc4, rc5) \
-	async_req_slow((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
-	    (arg5), (rc1), (rc2), (rc3), (rc4), (rc5))
-
-extern sysarg_t async_req_fast(int, sysarg_t, sysarg_t, sysarg_t, sysarg_t,
-    sysarg_t, sysarg_t *, sysarg_t *, sysarg_t *, sysarg_t *, sysarg_t *);
-extern sysarg_t async_req_slow(int, sysarg_t, sysarg_t, sysarg_t, sysarg_t,
+	async_req_slow(exch, method, arg1, arg2, arg3, arg4, arg5, rc1, rc2, \
+	    rc3, rc4, rc5)
+
+extern sysarg_t async_req_fast(async_exch_t *, sysarg_t, sysarg_t, sysarg_t,
     sysarg_t, sysarg_t, sysarg_t *, sysarg_t *, sysarg_t *, sysarg_t *,
     sysarg_t *);
-
-static inline void async_serialize_start(void)
-{
-	fibril_inc_sercount();
-}
-
-static inline void async_serialize_end(void)
-{
-	fibril_dec_sercount();
-}
-
-extern int async_connect_to_me(int, sysarg_t, sysarg_t, sysarg_t,
+extern sysarg_t async_req_slow(async_exch_t *, sysarg_t, sysarg_t, sysarg_t,
+    sysarg_t, sysarg_t, sysarg_t, sysarg_t *, sysarg_t *, sysarg_t *,
+    sysarg_t *, sysarg_t *);
+
+extern async_sess_t *async_connect_me(exch_mgmt_t, async_exch_t *);
+extern async_sess_t *async_connect_me_to(exch_mgmt_t, async_exch_t *, sysarg_t,
+    sysarg_t, sysarg_t);
+extern async_sess_t *async_connect_me_to_blocking(exch_mgmt_t, async_exch_t *,
+    sysarg_t, sysarg_t, sysarg_t);
+extern async_sess_t *async_connect_kbox(task_id_t);
+
+extern int async_connect_to_me(async_exch_t *, sysarg_t, sysarg_t, sysarg_t,
     async_client_conn_t);
-extern int async_connect_me_to(int, sysarg_t, sysarg_t, sysarg_t);
-extern int async_connect_me_to_blocking(int, sysarg_t, sysarg_t, sysarg_t);
-extern int async_connect_kbox(task_id_t);
-extern int async_hangup(int);
+
+extern int async_hangup(async_sess_t *);
 extern void async_poke(void);
 
+extern async_exch_t *async_exchange_begin(async_sess_t *);
+extern void async_exchange_end(async_exch_t *);
+
 /*
  * User-friendly wrappers for async_share_in_start().
  */
 
-#define async_share_in_start_0_0(phoneid, dst, size) \
-	async_share_in_start((phoneid), (dst), (size), 0, NULL)
-#define async_share_in_start_0_1(phoneid, dst, size, flags) \
-	async_share_in_start((phoneid), (dst), (size), 0, (flags))
-#define async_share_in_start_1_0(phoneid, dst, size, arg) \
-	async_share_in_start((phoneid), (dst), (size), (arg), NULL)
-#define async_share_in_start_1_1(phoneid, dst, size, arg, flags) \
-	async_share_in_start((phoneid), (dst), (size), (arg), (flags))
-
-extern int async_share_in_start(int, void *, size_t, sysarg_t, unsigned int *);
+#define async_share_in_start_0_0(exch, dst, size) \
+	async_share_in_start(exch, dst, size, 0, NULL)
+#define async_share_in_start_0_1(exch, dst, size, flags) \
+	async_share_in_start(exch, dst, size, 0, flags)
+#define async_share_in_start_1_0(exch, dst, size, arg) \
+	async_share_in_start(exch, dst, size, arg, NULL)
+#define async_share_in_start_1_1(exch, dst, size, arg, flags) \
+	async_share_in_start(exch, dst, size, arg, flags)
+
+extern int async_share_in_start(async_exch_t *, void *, size_t, sysarg_t,
+    unsigned int *);
 extern bool async_share_in_receive(ipc_callid_t *, size_t *);
 extern int async_share_in_finalize(ipc_callid_t, void *, unsigned int);
 
-extern int async_share_out_start(int, void *, unsigned int);
+extern int async_share_out_start(async_exch_t *, void *, unsigned int);
 extern bool async_share_out_receive(ipc_callid_t *, size_t *, unsigned int *);
 extern int async_share_out_finalize(ipc_callid_t, void *);
@@ -314,39 +385,37 @@
  */
 
-#define async_data_read_forward_0_0(phoneid, method, answer) \
-	async_data_read_forward_fast((phoneid), (method), 0, 0, 0, 0, NULL)
-#define async_data_read_forward_0_1(phoneid, method, answer) \
-	async_data_read_forward_fast((phoneid), (method), 0, 0, 0, 0, (answer))
-#define async_data_read_forward_1_0(phoneid, method, arg1, answer) \
-	async_data_read_forward_fast((phoneid), (method), (arg1), 0, 0, 0, NULL)
-#define async_data_read_forward_1_1(phoneid, method, arg1, answer) \
-	async_data_read_forward_fast((phoneid), (method), (arg1), 0, 0, 0, (answer))
-#define async_data_read_forward_2_0(phoneid, method, arg1, arg2, answer) \
-	async_data_read_forward_fast((phoneid), (method), (arg1), (arg2), 0, 0, NULL)
-#define async_data_read_forward_2_1(phoneid, method, arg1, arg2, answer) \
-	async_data_read_forward_fast((phoneid), (method), (arg1), (arg2), 0, 0, \
-	    (answer))
-#define async_data_read_forward_3_0(phoneid, method, arg1, arg2, arg3, answer) \
-	async_data_read_forward_fast((phoneid), (method), (arg1), (arg2), (arg3), 0, \
-	    NULL)
-#define async_data_read_forward_3_1(phoneid, method, arg1, arg2, arg3, answer) \
-	async_data_read_forward_fast((phoneid), (method), (arg1), (arg2), (arg3), 0, \
-	    (answer))
-#define async_data_read_forward_4_0(phoneid, method, arg1, arg2, arg3, arg4, answer) \
-	async_data_read_forward_fast((phoneid), (method), (arg1), (arg2), (arg3), \
-	    (arg4), NULL)
-#define async_data_read_forward_4_1(phoneid, method, arg1, arg2, arg3, arg4, answer) \
-	async_data_read_forward_fast((phoneid), (method), (arg1), (arg2), (arg3), \
-	    (arg4), (answer))
-
-#define async_data_read_start(p, buf, len) \
-	async_data_read_start_generic((p), (buf), (len), IPC_XF_NONE)
-
-extern int async_data_read_start_generic(int, void *, size_t, int);
+#define async_data_read_forward_0_0(exch, method, answer) \
+	async_data_read_forward_fast(exch, method, 0, 0, 0, 0, NULL)
+#define async_data_read_forward_0_1(exch, method, answer) \
+	async_data_read_forward_fast(exch, method, 0, 0, 0, 0, answer)
+#define async_data_read_forward_1_0(exch, method, arg1, answer) \
+	async_data_read_forward_fast(exch, method, arg1, 0, 0, 0, NULL)
+#define async_data_read_forward_1_1(exch, method, arg1, answer) \
+	async_data_read_forward_fast(exch, method, arg1, 0, 0, 0, answer)
+#define async_data_read_forward_2_0(exch, method, arg1, arg2, answer) \
+	async_data_read_forward_fast(exch, method, arg1, arg2, 0, 0, NULL)
+#define async_data_read_forward_2_1(exch, method, arg1, arg2, answer) \
+	async_data_read_forward_fast(exch, method, arg1, arg2, 0, 0, answer)
+#define async_data_read_forward_3_0(exch, method, arg1, arg2, arg3, answer) \
+	async_data_read_forward_fast(exch, method, arg1, arg2, arg3, 0, NULL)
+#define async_data_read_forward_3_1(exch, method, arg1, arg2, arg3, answer) \
+	async_data_read_forward_fast(exch, method, arg1, arg2, arg3, 0, \
+	    answer)
+#define async_data_read_forward_4_0(exch, method, arg1, arg2, arg3, arg4, \
+    answer) \
+	async_data_read_forward_fast(exch, method, arg1, arg2, arg3, arg4, \
+	    NULL)
+#define async_data_read_forward_4_1(exch, method, arg1, arg2, arg3, arg4, \
+    answer) \
+	async_data_read_forward_fast(exch, method, arg1, arg2, arg3, arg4, \
+	    answer)
+
+extern aid_t async_data_read(async_exch_t *, void *, size_t, ipc_call_t *);
+extern int async_data_read_start(async_exch_t *, void *, size_t);
 extern bool async_data_read_receive(ipc_callid_t *, size_t *);
 extern int async_data_read_finalize(ipc_callid_t, const void *, size_t);
 
-extern int async_data_read_forward_fast(int, sysarg_t, sysarg_t, sysarg_t,
-    sysarg_t, sysarg_t, ipc_call_t *);
+extern int async_data_read_forward_fast(async_exch_t *, sysarg_t, sysarg_t,
+    sysarg_t, sysarg_t, sysarg_t, ipc_call_t *);
 
 /*
@@ -354,36 +423,32 @@
  */
 
-#define async_data_write_forward_0_0(phoneid, method, answer) \
-	async_data_write_forward_fast((phoneid), (method), 0, 0, 0, 0, NULL)
-#define async_data_write_forward_0_1(phoneid, method, answer) \
-	async_data_write_forward_fast((phoneid), (method), 0, 0, 0, 0, (answer))
-#define async_data_write_forward_1_0(phoneid, method, arg1, answer) \
-	async_data_write_forward_fast((phoneid), (method), (arg1), 0, 0, 0, NULL)
-#define async_data_write_forward_1_1(phoneid, method, arg1, answer) \
-	async_data_write_forward_fast((phoneid), (method), (arg1), 0, 0, 0, \
-	    (answer))
-#define async_data_write_forward_2_0(phoneid, method, arg1, arg2, answer) \
-	async_data_write_forward_fast((phoneid), (method), (arg1), (arg2), 0, 0, \
-	    NULL)
-#define async_data_write_forward_2_1(phoneid, method, arg1, arg2, answer) \
-	async_data_write_forward_fast((phoneid), (method), (arg1), (arg2), 0, 0, \
-	    (answer))
-#define async_data_write_forward_3_0(phoneid, method, arg1, arg2, arg3, answer) \
-	async_data_write_forward_fast((phoneid), (method), (arg1), (arg2), (arg3), \
-	    0, NULL)
-#define async_data_write_forward_3_1(phoneid, method, arg1, arg2, arg3, answer) \
-	async_data_write_forward_fast((phoneid), (method), (arg1), (arg2), (arg3), \
-	    0, (answer))
-#define async_data_write_forward_4_0(phoneid, method, arg1, arg2, arg3, arg4, answer) \
-	async_data_write_forward_fast((phoneid), (method), (arg1), (arg2), (arg3), \
-	    (arg4), NULL)
-#define async_data_write_forward_4_1(phoneid, method, arg1, arg2, arg3, arg4, answer) \
-	async_data_write_forward_fast((phoneid), (method), (arg1), (arg2), (arg3), \
-	    (arg4), (answer))
-
-#define async_data_write_start(p, buf, len) \
-	async_data_write_start_generic((p), (buf), (len), IPC_XF_NONE)
-
-extern int async_data_write_start_generic(int, const void *, size_t, int);
+#define async_data_write_forward_0_0(exch, method, answer) \
+	async_data_write_forward_fast(exch, method, 0, 0, 0, 0, NULL)
+#define async_data_write_forward_0_1(exch, method, answer) \
+	async_data_write_forward_fast(exch, method, 0, 0, 0, 0, answer)
+#define async_data_write_forward_1_0(exch, method, arg1, answer) \
+	async_data_write_forward_fast(exch, method, arg1, 0, 0, 0, NULL)
+#define async_data_write_forward_1_1(exch, method, arg1, answer) \
+	async_data_write_forward_fast(exch, method, arg1, 0, 0, 0, answer)
+#define async_data_write_forward_2_0(exch, method, arg1, arg2, answer) \
+	async_data_write_forward_fast(exch, method, arg1, arg2, 0, 0, NULL)
+#define async_data_write_forward_2_1(exch, method, arg1, arg2, answer) \
+	async_data_write_forward_fast(exch, method, arg1, arg2, 0, 0, answer)
+#define async_data_write_forward_3_0(exch, method, arg1, arg2, arg3, answer) \
+	async_data_write_forward_fast(exch, method, arg1, arg2, arg3, 0, \
+	    NULL)
+#define async_data_write_forward_3_1(exch, method, arg1, arg2, arg3, answer) \
+	async_data_write_forward_fast(exch, method, arg1, arg2, arg3, 0, \
+	    answer)
+#define async_data_write_forward_4_0(exch, method, arg1, arg2, arg3, arg4, \
+    answer) \
+	async_data_write_forward_fast(exch, method, arg1, arg2, arg3, arg4, \
+	    NULL)
+#define async_data_write_forward_4_1(exch, method, arg1, arg2, arg3, arg4, \
+    answer) \
+	async_data_write_forward_fast(exch, method, arg1, arg2, arg3, arg4, \
+	    answer)
+
+extern int async_data_write_start(async_exch_t *, const void *, size_t);
 extern bool async_data_write_receive(ipc_callid_t *, size_t *);
 extern int async_data_write_finalize(ipc_callid_t, void *, size_t);
@@ -393,6 +458,10 @@
 extern void async_data_write_void(sysarg_t);
 
-extern int async_data_write_forward_fast(int, sysarg_t, sysarg_t, sysarg_t,
-    sysarg_t, sysarg_t, ipc_call_t *);
+extern int async_data_write_forward_fast(async_exch_t *, sysarg_t, sysarg_t,
+    sysarg_t, sysarg_t, sysarg_t, ipc_call_t *);
+
+extern int async_exchange_clone(async_exch_t *, async_exch_t *);
+extern async_sess_t *async_clone_receive(exch_mgmt_t);
+extern async_sess_t *async_callback_receive(exch_mgmt_t);
 
 #endif
Index: uspace/lib/c/include/async_obsolete.h
===================================================================
--- uspace/lib/c/include/async_obsolete.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/c/include/async_obsolete.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,267 @@
+/*
+ * Copyright (c) 2006 Ondrej Palkovsky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+/** @file
+ */
+
+#if ((defined(LIBC_IPC_H_)) && (!defined(LIBC_ASYNC_OBSOLETE_C_)))
+	#error Do not intermix low-level IPC interface and async framework
+#endif
+
+#ifndef LIBC_ASYNC_OBSOLETE_H_
+#define LIBC_ASYNC_OBSOLETE_H_
+
+extern void async_obsolete_serialize_start(void);
+extern void async_obsolete_serialize_end(void);
+
+#define async_obsolete_send_0(phoneid, method, dataptr) \
+	async_obsolete_send_fast((phoneid), (method), 0, 0, 0, 0, (dataptr))
+#define async_obsolete_send_1(phoneid, method, arg1, dataptr) \
+	async_obsolete_send_fast((phoneid), (method), (arg1), 0, 0, 0, (dataptr))
+#define async_obsolete_send_2(phoneid, method, arg1, arg2, dataptr) \
+	async_obsolete_send_fast((phoneid), (method), (arg1), (arg2), 0, 0, (dataptr))
+#define async_obsolete_send_3(phoneid, method, arg1, arg2, arg3, dataptr) \
+	async_obsolete_send_fast((phoneid), (method), (arg1), (arg2), (arg3), 0, (dataptr))
+#define async_obsolete_send_4(phoneid, method, arg1, arg2, arg3, arg4, dataptr) \
+	async_obsolete_send_fast((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
+	    (dataptr))
+#define async_obsolete_send_5(phoneid, method, arg1, arg2, arg3, arg4, arg5, dataptr) \
+	async_obsolete_send_slow((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
+	    (arg5), (dataptr))
+
+extern aid_t async_obsolete_send_fast(int phoneid, sysarg_t method, sysarg_t arg1,
+    sysarg_t arg2, sysarg_t arg3, sysarg_t arg4, ipc_call_t *dataptr);
+extern aid_t async_obsolete_send_slow(int phoneid, sysarg_t method, sysarg_t arg1,
+    sysarg_t arg2, sysarg_t arg3, sysarg_t arg4, sysarg_t arg5,
+    ipc_call_t *dataptr);
+
+#define async_obsolete_req_0_0(phoneid, method) \
+	async_obsolete_req_fast((phoneid), (method), 0, 0, 0, 0, NULL, NULL, NULL, NULL, \
+	    NULL)
+#define async_obsolete_req_0_1(phoneid, method, r1) \
+	async_obsolete_req_fast((phoneid), (method), 0, 0, 0, 0, (r1), NULL, NULL, NULL, \
+	    NULL)
+#define async_obsolete_req_0_2(phoneid, method, r1, r2) \
+	async_obsolete_req_fast((phoneid), (method), 0, 0, 0, 0, (r1), (r2), NULL, NULL, \
+	    NULL)
+#define async_obsolete_req_0_3(phoneid, method, r1, r2, r3) \
+	async_obsolete_req_fast((phoneid), (method), 0, 0, 0, 0, (r1), (r2), (r3), NULL, \
+	    NULL)
+#define async_obsolete_req_0_4(phoneid, method, r1, r2, r3, r4) \
+	async_obsolete_req_fast((phoneid), (method), 0, 0, 0, 0, (r1), (r2), (r3), (r4), \
+	    NULL)
+#define async_obsolete_req_0_5(phoneid, method, r1, r2, r3, r4, r5) \
+	async_obsolete_req_fast((phoneid), (method), 0, 0, 0, 0, (r1), (r2), (r3), (r4), \
+	    (r5))
+#define async_obsolete_req_1_0(phoneid, method, arg1) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), 0, 0, 0, NULL, NULL, NULL, \
+	    NULL, NULL)
+#define async_obsolete_req_1_1(phoneid, method, arg1, rc1) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), 0, 0, 0, (rc1), NULL, NULL, \
+	    NULL, NULL)
+#define async_obsolete_req_1_2(phoneid, method, arg1, rc1, rc2) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), 0, 0, 0, (rc1), (rc2), NULL, \
+	    NULL, NULL)
+#define async_obsolete_req_1_3(phoneid, method, arg1, rc1, rc2, rc3) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), 0, 0, 0, (rc1), (rc2), (rc3), \
+	    NULL, NULL)
+#define async_obsolete_req_1_4(phoneid, method, arg1, rc1, rc2, rc3, rc4) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), 0, 0, 0, (rc1), (rc2), (rc3), \
+	    (rc4), NULL)
+#define async_obsolete_req_1_5(phoneid, method, arg1, rc1, rc2, rc3, rc4, rc5) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), 0, 0, 0, (rc1), (rc2), (rc3), \
+	    (rc4), (rc5))
+#define async_obsolete_req_2_0(phoneid, method, arg1, arg2) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), 0, 0, NULL, NULL, \
+	    NULL, NULL, NULL)
+#define async_obsolete_req_2_1(phoneid, method, arg1, arg2, rc1) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), 0, 0, (rc1), NULL, \
+	    NULL, NULL, NULL)
+#define async_obsolete_req_2_2(phoneid, method, arg1, arg2, rc1, rc2) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), 0, 0, (rc1), (rc2), \
+	    NULL, NULL, NULL)
+#define async_obsolete_req_2_3(phoneid, method, arg1, arg2, rc1, rc2, rc3) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), 0, 0, (rc1), (rc2), \
+	    (rc3), NULL, NULL)
+#define async_obsolete_req_2_4(phoneid, method, arg1, arg2, rc1, rc2, rc3, rc4) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), 0, 0, (rc1), (rc2), \
+	    (rc3), (rc4), NULL)
+#define async_obsolete_req_2_5(phoneid, method, arg1, arg2, rc1, rc2, rc3, rc4, rc5) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), 0, 0, (rc1), (rc2), \
+	    (rc3), (rc4), (rc5))
+#define async_obsolete_req_3_0(phoneid, method, arg1, arg2, arg3) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), (arg3), 0, NULL, NULL, \
+	    NULL, NULL, NULL)
+#define async_obsolete_req_3_1(phoneid, method, arg1, arg2, arg3, rc1) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), (arg3), 0, (rc1), \
+	    NULL, NULL, NULL, NULL)
+#define async_obsolete_req_3_2(phoneid, method, arg1, arg2, arg3, rc1, rc2) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), (arg3), 0, (rc1), \
+	    (rc2), NULL, NULL, NULL)
+#define async_obsolete_req_3_3(phoneid, method, arg1, arg2, arg3, rc1, rc2, rc3) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), (arg3), 0, (rc1), \
+	    (rc2), (rc3), NULL, NULL)
+#define async_obsolete_req_3_4(phoneid, method, arg1, arg2, arg3, rc1, rc2, rc3, rc4) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), (arg3), 0, (rc1), \
+	    (rc2), (rc3), (rc4), NULL)
+#define async_obsolete_req_3_5(phoneid, method, arg1, arg2, arg3, rc1, rc2, rc3, rc4, \
+    rc5) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), (arg3), 0, (rc1), \
+	    (rc2), (rc3), (rc4), (rc5))
+#define async_obsolete_req_4_0(phoneid, method, arg1, arg2, arg3, arg4) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), (arg3), (arg4), NULL, \
+	    NULL, NULL, NULL, NULL)
+#define async_obsolete_req_4_1(phoneid, method, arg1, arg2, arg3, arg4, rc1) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), (arg3), (arg4), (rc1), \
+	    NULL, NULL, NULL, NULL)
+#define async_obsolete_req_4_2(phoneid, method, arg1, arg2, arg3, arg4, rc1, rc2) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), (arg3), (arg4), (rc1), \
+	    (rc2), NULL, NULL, NULL)
+#define async_obsolete_req_4_3(phoneid, method, arg1, arg2, arg3, arg4, rc1, rc2, rc3) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), (arg3), (arg4), (rc1), \
+	    (rc2), (rc3), NULL, NULL)
+#define async_obsolete_req_4_4(phoneid, method, arg1, arg2, arg3, arg4, rc1, rc2, rc3, \
+    rc4) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
+	    (rc1), (rc2), (rc3), (rc4), NULL)
+#define async_obsolete_req_4_5(phoneid, method, arg1, arg2, arg3, arg4, rc1, rc2, rc3, \
+    rc4, rc5) \
+	async_obsolete_req_fast((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
+	    (rc1), (rc2), (rc3), (rc4), (rc5))
+#define async_obsolete_req_5_0(phoneid, method, arg1, arg2, arg3, arg4, arg5) \
+	async_obsolete_req_slow((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
+	    (arg5), NULL, NULL, NULL, NULL, NULL)
+#define async_obsolete_req_5_1(phoneid, method, arg1, arg2, arg3, arg4, arg5, rc1) \
+	async_obsolete_req_slow((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
+	    (arg5), (rc1), NULL, NULL, NULL, NULL)
+#define async_obsolete_req_5_2(phoneid, method, arg1, arg2, arg3, arg4, arg5, rc1, rc2) \
+	async_obsolete_req_slow((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
+	    (arg5), (rc1), (rc2), NULL, NULL, NULL)
+#define async_obsolete_req_5_3(phoneid, method, arg1, arg2, arg3, arg4, arg5, rc1, rc2, \
+    rc3) \
+	async_obsolete_req_slow((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
+	    (arg5), (rc1), (rc2), (rc3), NULL, NULL)
+#define async_obsolete_req_5_4(phoneid, method, arg1, arg2, arg3, arg4, arg5, rc1, rc2, \
+    rc3, rc4) \
+	async_obsolete_req_slow((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
+	    (arg5), (rc1), (rc2), (rc3), (rc4), NULL)
+#define async_obsolete_req_5_5(phoneid, method, arg1, arg2, arg3, arg4, arg5, rc1, rc2, \
+    rc3, rc4, rc5) \
+	async_obsolete_req_slow((phoneid), (method), (arg1), (arg2), (arg3), (arg4), \
+	    (arg5), (rc1), (rc2), (rc3), (rc4), (rc5))
+
+extern sysarg_t async_obsolete_req_fast(int phoneid, sysarg_t method, sysarg_t arg1,
+    sysarg_t arg2, sysarg_t arg3, sysarg_t arg4, sysarg_t *r1, sysarg_t *r2,
+    sysarg_t *r3, sysarg_t *r4, sysarg_t *r5);
+extern sysarg_t async_obsolete_req_slow(int phoneid, sysarg_t method, sysarg_t arg1,
+    sysarg_t arg2, sysarg_t arg3, sysarg_t arg4, sysarg_t arg5, sysarg_t *r1,
+    sysarg_t *r2, sysarg_t *r3, sysarg_t *r4, sysarg_t *r5);
+
+extern void async_obsolete_msg_0(int, sysarg_t);
+extern void async_obsolete_msg_1(int, sysarg_t, sysarg_t);
+extern void async_obsolete_msg_2(int, sysarg_t, sysarg_t, sysarg_t);
+extern void async_obsolete_msg_3(int, sysarg_t, sysarg_t, sysarg_t, sysarg_t);
+extern void async_obsolete_msg_4(int, sysarg_t, sysarg_t, sysarg_t, sysarg_t, sysarg_t);
+extern void async_obsolete_msg_5(int, sysarg_t, sysarg_t, sysarg_t, sysarg_t, sysarg_t,
+    sysarg_t);
+
+extern int async_obsolete_forward_slow(ipc_callid_t, int, sysarg_t, sysarg_t, sysarg_t,
+    sysarg_t, sysarg_t, sysarg_t, unsigned int);
+
+extern int async_obsolete_connect_to_me(int, sysarg_t, sysarg_t, sysarg_t,
+    async_client_conn_t);
+extern int async_obsolete_connect_me_to(int, sysarg_t, sysarg_t, sysarg_t);
+extern int async_obsolete_connect_me_to_blocking(int, sysarg_t, sysarg_t, sysarg_t);
+extern int async_obsolete_hangup(int);
+
+#define async_obsolete_share_in_start_0_0(phoneid, dst, size) \
+	async_obsolete_share_in_start((phoneid), (dst), (size), 0, NULL)
+#define async_obsolete_share_in_start_0_1(phoneid, dst, size, flags) \
+	async_obsolete_share_in_start((phoneid), (dst), (size), 0, (flags))
+#define async_obsolete_share_in_start_1_0(phoneid, dst, size, arg) \
+	async_obsolete_share_in_start((phoneid), (dst), (size), (arg), NULL)
+#define async_obsolete_share_in_start_1_1(phoneid, dst, size, arg, flags) \
+	async_obsolete_share_in_start((phoneid), (dst), (size), (arg), (flags))
+
+extern int async_obsolete_share_in_start(int, void *, size_t, sysarg_t,
+    unsigned int *);
+extern int async_obsolete_share_out_start(int, void *, unsigned int);
+
+#define async_obsolete_data_write_start(p, buf, len) \
+	async_obsolete_data_write_start_generic((p), (buf), (len), IPC_XF_NONE)
+
+#define async_obsolete_data_read_start(p, buf, len) \
+	async_obsolete_data_read_start_generic((p), (buf), (len), IPC_XF_NONE)
+
+#define async_obsolete_data_write_forward_0_0(phoneid, method, answer) \
+	async_obsolete_data_write_forward_fast((phoneid), (method), 0, 0, 0, 0, NULL)
+#define async_obsolete_data_write_forward_0_1(phoneid, method, answer) \
+	async_obsolete_data_write_forward_fast((phoneid), (method), 0, 0, 0, 0, (answer))
+#define async_obsolete_data_write_forward_1_0(phoneid, method, arg1, answer) \
+	async_obsolete_data_write_forward_fast((phoneid), (method), (arg1), 0, 0, 0, NULL)
+#define async_obsolete_data_write_forward_1_1(phoneid, method, arg1, answer) \
+	async_obsolete_data_write_forward_fast((phoneid), (method), (arg1), 0, 0, 0, \
+	    (answer))
+#define async_obsolete_data_write_forward_2_0(phoneid, method, arg1, arg2, answer) \
+	async_obsolete_data_write_forward_fast((phoneid), (method), (arg1), (arg2), 0, 0, \
+	    NULL)
+#define async_obsolete_data_write_forward_2_1(phoneid, method, arg1, arg2, answer) \
+	async_obsolete_data_write_forward_fast((phoneid), (method), (arg1), (arg2), 0, 0, \
+	    (answer))
+#define async_obsolete_data_write_forward_3_0(phoneid, method, arg1, arg2, arg3, answer) \
+	async_obsolete_data_write_forward_fast((phoneid), (method), (arg1), (arg2), (arg3), \
+	    0, NULL)
+#define async_obsolete_data_write_forward_3_1(phoneid, method, arg1, arg2, arg3, answer) \
+	async_obsolete_data_write_forward_fast((phoneid), (method), (arg1), (arg2), (arg3), \
+	    0, (answer))
+#define async_obsolete_data_write_forward_4_0(phoneid, method, arg1, arg2, arg3, arg4, answer) \
+	async_obsolete_data_write_forward_fast((phoneid), (method), (arg1), (arg2), (arg3), \
+	    (arg4), NULL)
+#define async_obsolete_data_write_forward_4_1(phoneid, method, arg1, arg2, arg3, arg4, answer) \
+	async_obsolete_data_write_forward_fast((phoneid), (method), (arg1), (arg2), (arg3), \
+	    (arg4), (answer))
+
+extern aid_t async_obsolete_data_read(int, void *, size_t, ipc_call_t *);
+extern int async_obsolete_data_read_start_generic(int, void *, size_t, int);
+
+extern int async_obsolete_data_write_start_generic(int, const void *, size_t, int);
+extern void async_obsolete_data_write_void(const int);
+
+extern int async_obsolete_forward_fast(ipc_callid_t, int, sysarg_t, sysarg_t,
+    sysarg_t, unsigned int);
+
+extern int async_obsolete_data_write_forward_fast(int, sysarg_t, sysarg_t, sysarg_t,
+    sysarg_t, sysarg_t, ipc_call_t *);
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/c/include/async_sess.h
===================================================================
--- uspace/lib/c/include/async_sess.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ 	(revision )
@@ -1,55 +1,0 @@
-/*
- * Copyright (c) 2010 Jakub Jermar
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * - Redistributions of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * - Redistributions in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * - The name of the author may not be used to endorse or promote products
- *   derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/** @addtogroup libc
- * @{
- */
-/** @file
- */
-
-#ifndef LIBC_ASYNC_SESS_H_
-#define LIBC_ASYNC_SESS_H_
-
-#include <adt/list.h>
-
-typedef struct {
-	int sess_phone;		/**< Phone for cloning off the connections. */
-	sysarg_t connect_arg1;  /**< Argument for CONNECT_ME_TO. */
-	link_t conn_head;	/**< List of open data connections. */
-	link_t sess_link;	/**< Link in global list of open sessions. */
-} async_sess_t;
-
-extern void async_session_create(async_sess_t *, int, sysarg_t);
-extern void async_session_destroy(async_sess_t *);
-extern int async_exchange_begin(async_sess_t *);
-extern void async_exchange_end(async_sess_t *, int);
-
-#endif
-
-/** @}
- */
Index: uspace/lib/c/include/device/char_dev.h
===================================================================
--- uspace/lib/c/include/device/char_dev.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/device/char_dev.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -36,4 +36,6 @@
 #define LIBC_DEVICE_CHAR_DEV_H_
 
+#include <async.h>
+
 typedef enum {
 	CHAR_DEV_READ = 0,
@@ -41,6 +43,6 @@
 } char_dev_method_t;
 
-ssize_t char_dev_read(int dev_phone, void *buf, size_t len);
-ssize_t char_dev_write(int dev_phone, void *buf, size_t len);
+extern ssize_t char_dev_read(async_sess_t *, void *, size_t);
+extern ssize_t char_dev_write(async_sess_t *, void *, size_t);
 
 #endif
Index: uspace/lib/c/include/device/hw_res.h
===================================================================
--- uspace/lib/c/include/device/hw_res.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/device/hw_res.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -26,5 +26,5 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
- 
+
 /** @addtogroup libc
  * @{
@@ -32,9 +32,10 @@
 /** @file
  */
- 
+
 #ifndef LIBC_DEVICE_HW_RES_H_
 #define LIBC_DEVICE_HW_RES_H_
 
 #include <ipc/dev_iface.h>
+#include <async.h>
 #include <bool.h>
 
@@ -48,5 +49,5 @@
 typedef enum {
 	INTERRUPT,
-	IO_RANGE, 
+	IO_RANGE,
 	MEM_RANGE
 } hw_res_type_t;
@@ -66,5 +67,5 @@
 			size_t size;
 		} mem_range;
-
+		
 		struct {
 			uint64_t address;
@@ -72,5 +73,5 @@
 			size_t size;
 		} io_range;
-
+		
 		struct {
 			int irq;
@@ -88,13 +89,12 @@
 	if (hw_res->resources != NULL) {
 		free(hw_res->resources);
-
 		hw_res->resources = NULL;
 	}
-
+	
 	hw_res->count = 0;
 }
 
-extern int hw_res_get_resource_list(int, hw_resource_list_t *);
-extern bool hw_res_enable_interrupt(int);
+extern int hw_res_get_resource_list(async_sess_t *, hw_resource_list_t *);
+extern bool hw_res_enable_interrupt(async_sess_t *);
 
 #endif
Index: uspace/lib/c/include/devman.h
===================================================================
--- uspace/lib/c/include/devman.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/devman.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -41,6 +41,7 @@
 #include <bool.h>
 
-extern int devman_get_phone(devman_interface_t, unsigned int);
-extern void devman_hangup_phone(devman_interface_t);
+extern async_exch_t *devman_exchange_begin_blocking(devman_interface_t);
+extern async_exch_t *devman_exchange_begin(devman_interface_t);
+extern void devman_exchange_end(async_exch_t *);
 
 extern int devman_driver_register(const char *, async_client_conn_t);
@@ -48,6 +49,8 @@
     devman_handle_t, devman_handle_t *);
 
-extern int devman_device_connect(devman_handle_t, unsigned int);
-extern int devman_parent_device_connect(devman_handle_t, unsigned int);
+extern async_sess_t *devman_device_connect(exch_mgmt_t, devman_handle_t,
+    unsigned int);
+extern async_sess_t *devman_parent_device_connect(exch_mgmt_t, devman_handle_t,
+    unsigned int);
 
 extern int devman_device_get_handle(const char *, devman_handle_t *,
@@ -55,4 +58,5 @@
 extern int devman_device_get_handle_by_class(const char *, const char *,
     devman_handle_t *, unsigned int);
+extern int devman_get_device_path(devman_handle_t, char *, size_t);
 
 extern int devman_add_device_to_class(devman_handle_t, const char *);
Index: uspace/lib/c/include/devman_obsolete.h
===================================================================
--- uspace/lib/c/include/devman_obsolete.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/c/include/devman_obsolete.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2009 Jiri Svoboda
+ * Copyright (c) 2010 Lenka Trochtova 
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+/** @file
+ */
+
+#ifndef LIBC_DEVMAN_OBSOLETE_H_
+#define LIBC_DEVMAN_OBSOLETE_H_
+
+#include <ipc/devman.h>
+#include <async.h>
+#include <bool.h>
+
+extern int devman_obsolete_get_phone(devman_interface_t, unsigned int);
+extern void devman_obsolete_hangup_phone(devman_interface_t);
+
+extern int devman_obsolete_device_connect(devman_handle_t, unsigned int);
+extern int devman_obsolete_parent_device_connect(devman_handle_t, unsigned int);
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/c/include/devmap.h
===================================================================
--- uspace/lib/c/include/devmap.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/devmap.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -40,16 +40,21 @@
 #include <bool.h>
 
-extern int devmap_get_phone(devmap_interface_t, unsigned int);
-extern void devmap_hangup_phone(devmap_interface_t iface);
+extern async_exch_t *devmap_exchange_begin_blocking(devmap_interface_t);
+extern async_exch_t *devmap_exchange_begin(devmap_interface_t);
+extern void devmap_exchange_end(async_exch_t *);
 
 extern int devmap_driver_register(const char *, async_client_conn_t);
 extern int devmap_device_register(const char *, devmap_handle_t *);
-extern int devmap_device_register_with_iface(const char *, devmap_handle_t *, sysarg_t);
+extern int devmap_device_register_with_iface(const char *, devmap_handle_t *,
+    sysarg_t);
 
-extern int devmap_device_get_handle(const char *, devmap_handle_t *, unsigned int);
-extern int devmap_namespace_get_handle(const char *, devmap_handle_t *, unsigned int);
+extern int devmap_device_get_handle(const char *, devmap_handle_t *,
+    unsigned int);
+extern int devmap_namespace_get_handle(const char *, devmap_handle_t *,
+    unsigned int);
 extern devmap_handle_type_t devmap_handle_probe(devmap_handle_t);
 
-extern int devmap_device_connect(devmap_handle_t, unsigned int);
+extern async_sess_t *devmap_device_connect(exch_mgmt_t, devmap_handle_t,
+    unsigned int);
 
 extern int devmap_null_create(void);
Index: uspace/lib/c/include/devmap_obsolete.h
===================================================================
--- uspace/lib/c/include/devmap_obsolete.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/c/include/devmap_obsolete.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2009 Jiri Svoboda
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+/** @file
+ */
+
+#ifndef LIBC_DEVMAP_OBSOLETE_H_
+#define LIBC_DEVMAP_OBSOLETE_H_
+
+#include <ipc/devmap.h>
+#include <async.h>
+#include <bool.h>
+
+extern int devmap_obsolete_get_phone(devmap_interface_t, unsigned int);
+extern void devmap_obsolete_hangup_phone(devmap_interface_t iface);
+
+extern int devmap_obsolete_device_connect(devmap_handle_t, unsigned int);
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/c/include/errno.h
===================================================================
--- uspace/lib/c/include/errno.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/errno.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -56,4 +56,16 @@
 #define EMLINK        (-266)
 
+/** Bad checksum. */
+#define EBADCHECKSUM  (-300)
+
+/** USB: stalled operation. */
+#define ESTALL (-301)
+
+/** Empty resource (no data). */
+#define EEMPTY (-302)
+
+/** Negative acknowledgment. */
+#define ENAK (-303)
+
 /** An API function is called while another blocking function is in progress. */
 #define EINPROGRESS  (-10036)
Index: uspace/lib/c/include/io/console.h
===================================================================
--- uspace/lib/c/include/io/console.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/io/console.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -36,10 +36,8 @@
 #define LIBC_IO_CONSOLE_H_
 
+#include <sys/time.h>
+#include <async.h>
 #include <bool.h>
-
-typedef enum {
-	KEY_PRESS,
-	KEY_RELEASE
-} console_ev_type_t;
+#include <stdio.h>
 
 typedef enum {
@@ -50,8 +48,34 @@
 } console_caps_t;
 
+/** Console control structure. */
+typedef struct {
+	/** Console input file */
+	FILE *input;
+	
+	/** Console output file */
+	FILE *output;
+	
+	/** Console input session */
+	async_sess_t *input_sess;
+	
+	/** Console output session */
+	async_sess_t *output_sess;
+	
+	/** Input request call with timeout */
+	ipc_call_t input_call;
+	
+	/** Input response with timeout */
+	aid_t input_aid;
+} console_ctrl_t;
+
+typedef enum {
+	KEY_PRESS,
+	KEY_RELEASE
+} kbd_event_type_t;
+
 /** Console event structure. */
 typedef struct {
 	/** Press or release event. */
-	console_ev_type_t type;
+	kbd_event_type_t type;
 	
 	/** Keycode of the key that was pressed or released. */
@@ -63,22 +87,26 @@
 	/** The character that was generated or '\0' for none. */
 	wchar_t c;
-} console_event_t;
+} kbd_event_t;
 
-extern void console_clear(int phone);
+extern console_ctrl_t *console_init(FILE *, FILE *);
+extern void console_done(console_ctrl_t *);
+extern bool console_kcon(void);
 
-extern int console_get_size(int phone, sysarg_t *cols, sysarg_t *rows);
-extern int console_get_pos(int phone, sysarg_t *col, sysarg_t *row);
-extern void console_set_pos(int phone, sysarg_t col, sysarg_t row);
+extern void console_flush(console_ctrl_t *);
+extern void console_clear(console_ctrl_t *);
 
-extern void console_set_style(int phone, uint8_t style);
-extern void console_set_color(int phone, uint8_t fg_color, uint8_t bg_color,
-    uint8_t flags);
-extern void console_set_rgb_color(int phone, uint32_t fg_color, uint32_t bg_color);
+extern int console_get_size(console_ctrl_t *, sysarg_t *, sysarg_t *);
+extern int console_get_pos(console_ctrl_t *, sysarg_t *, sysarg_t *);
+extern void console_set_pos(console_ctrl_t *, sysarg_t, sysarg_t);
 
-extern void console_cursor_visibility(int phone, bool show);
-extern int console_get_color_cap(int phone, sysarg_t *ccap);
-extern void console_kcon_enable(int phone);
+extern void console_set_style(console_ctrl_t *, uint8_t);
+extern void console_set_color(console_ctrl_t *, uint8_t, uint8_t, uint8_t);
+extern void console_set_rgb_color(console_ctrl_t *, uint32_t, uint32_t);
 
-extern bool console_get_event(int phone, console_event_t *event);
+extern void console_cursor_visibility(console_ctrl_t *, bool);
+extern int console_get_color_cap(console_ctrl_t *, sysarg_t *);
+extern bool console_get_kbd_event(console_ctrl_t *, kbd_event_t *);
+extern bool console_get_kbd_event_timeout(console_ctrl_t *, kbd_event_t *,
+    suseconds_t *);
 
 #endif
Index: uspace/lib/c/include/ipc/dev_iface.h
===================================================================
--- uspace/lib/c/include/ipc/dev_iface.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/ipc/dev_iface.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -37,4 +37,15 @@
 	HW_RES_DEV_IFACE = 0,
 	CHAR_DEV_IFACE,
+
+	/** Interface provided by any PCI device. */
+	PCI_DEV_IFACE,
+
+	/** Interface provided by any USB device. */
+	USB_DEV_IFACE,
+	/** Interface provided by USB host controller. */
+	USBHC_DEV_IFACE,
+	/** Interface provided by USB HID devices. */
+	USBHID_DEV_IFACE,
+
 	DEV_IFACE_MAX
 } dev_inferface_idx_t;
@@ -48,4 +59,14 @@
 	DEV_IFACE_ID(DEV_FIRST_CUSTOM_METHOD_IDX)
 
+/*
+ * The first argument is actually method (as the "real" method is used
+ * for indexing into interfaces.
+ */
+
+#define DEV_IPC_GET_ARG1(call) IPC_GET_ARG2((call))
+#define DEV_IPC_GET_ARG2(call) IPC_GET_ARG3((call))
+#define DEV_IPC_GET_ARG3(call) IPC_GET_ARG4((call))
+#define DEV_IPC_GET_ARG4(call) IPC_GET_ARG5((call))
+
 
 #endif
Index: uspace/lib/c/include/ipc/devman.h
===================================================================
--- uspace/lib/c/include/ipc/devman.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/ipc/devman.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -149,5 +149,6 @@
 typedef enum {
 	DEVMAN_DEVICE_GET_HANDLE = IPC_FIRST_USER_METHOD,
-	DEVMAN_DEVICE_GET_HANDLE_BY_CLASS
+	DEVMAN_DEVICE_GET_HANDLE_BY_CLASS,
+	DEVMAN_DEVICE_GET_DEVICE_PATH
 } client_to_devman_t;
 
Index: uspace/lib/c/include/ipc/devmap.h
===================================================================
--- uspace/lib/c/include/ipc/devmap.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/ipc/devmap.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -31,6 +31,6 @@
  */
 
-#ifndef DEVMAP_DEVMAP_H_
-#define DEVMAP_DEVMAP_H_
+#ifndef LIBC_IPC_DEVMAP_H_
+#define LIBC_IPC_DEVMAP_H_
 
 #include <ipc/common.h>
Index: uspace/lib/c/include/ipc/ipc.h
===================================================================
--- uspace/lib/c/include/ipc/ipc.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/ipc/ipc.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -42,4 +42,5 @@
 #include <sys/types.h>
 #include <ipc/common.h>
+#include <kernel/ipc/ipc_methods.h>
 #include <kernel/synch/synch.h>
 #include <task.h>
@@ -255,4 +256,5 @@
 extern int ipc_connect_to_me(int, sysarg_t, sysarg_t, sysarg_t, sysarg_t *,
     sysarg_t *);
+extern int ipc_connect_me(int);
 extern int ipc_connect_me_to(int, sysarg_t, sysarg_t, sysarg_t);
 extern int ipc_connect_me_to_blocking(int, sysarg_t, sysarg_t, sysarg_t);
Index: uspace/lib/c/include/ipc/kbd.h
===================================================================
--- uspace/lib/c/include/ipc/kbd.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/ipc/kbd.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -39,7 +39,8 @@
 
 #include <ipc/common.h>
+#include <ipc/dev_iface.h>
 
 typedef enum {
-	KBD_YIELD = IPC_FIRST_USER_METHOD,
+	KBD_YIELD = DEV_FIRST_CUSTOM_METHOD,
 	KBD_RECLAIM
 } kbd_request_t;
Index: uspace/lib/c/include/ipc/ns.h
===================================================================
--- uspace/lib/c/include/ipc/ns.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/ipc/ns.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -33,8 +33,7 @@
  */
 
-#ifndef LIBC_NS_H_
-#define LIBC_NS_H_
+#ifndef LIBC_IPC_NS_H_
+#define LIBC_IPC_NS_H_
 
-#include <sys/types.h>
 #include <ipc/common.h>
 
@@ -46,8 +45,4 @@
 } ns_request_t;
 
-extern int service_register(sysarg_t);
-extern int service_connect(sysarg_t, sysarg_t, sysarg_t);
-extern int service_connect_blocking(sysarg_t, sysarg_t, sysarg_t);
-
 #endif
 
Index: uspace/lib/c/include/ipc/serial_ctl.h
===================================================================
--- uspace/lib/c/include/ipc/serial_ctl.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/ipc/serial_ctl.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -32,11 +32,13 @@
 #include <ipc/dev_iface.h>
 
-/** ipc methods for getting/setting serial communication properties
- * 	1st ipc arg: baud rate
- * 	2nd ipc arg: parity
- *	3rd ipc arg: number of bits in one word
- *	4th ipc arg: number of stop bits
+/** IPC methods for getting/setting serial communication properties
+ *
+ * 1st IPC arg: baud rate
+ * 2nd IPC arg: parity
+ * 3rd IPC arg: number of bits in one word
+ * 4th IPC arg: number of stop bits
+ *
  */
-typedef enum {	
+typedef enum {
 	SERIAL_GET_COM_PROPS = DEV_FIRST_CUSTOM_METHOD,
 	SERIAL_SET_COM_PROPS
@@ -48,5 +50,5 @@
 	SERIAL_EVEN_PARITY = 3,
 	SERIAL_MARK_PARITY = 5,
-	SERIAL_SPACE_PARITY = 7	
+	SERIAL_SPACE_PARITY = 7
 } serial_parity_t;
 
Index: uspace/lib/c/include/ipc/vfs.h
===================================================================
--- uspace/lib/c/include/ipc/vfs.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/ipc/vfs.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -69,4 +69,5 @@
 	VFS_IN_FSTAT,
 	VFS_IN_CLOSE,
+	VFS_IN_PING,
 	VFS_IN_MOUNT,
 	VFS_IN_UNMOUNT,
Index: uspace/lib/c/include/l18n/langs.h
===================================================================
--- uspace/lib/c/include/l18n/langs.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/c/include/l18n/langs.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2005 Jakub Jermar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+/** @file
+ * Language and locale ids.
+ */
+
+#ifndef LIBC_L18N_LANGS_H_
+#define LIBC_L18N_LANGS_H_
+
+/** Windows locale IDs.
+ * Codes taken from
+ * Developing International Software For Windows 95 and Windows NT
+ * by Nadine Kano (Microsoft Press).
+ * FIXME: add missing codes.
+ */
+typedef enum {
+	L18N_WIN_LOCALE_AFRIKAANS = 0x0436,
+	/* ... */
+	L18N_WIN_LOCALE_CZECH = 0x0405,
+	/* ... */
+	L18N_WIN_LOCALE_ENGLISH_UNITED_STATES = 0x0409,
+	/* ... */
+	L18N_WIN_LOCALE_SLOVAK = 0x041B,
+	/* ... */
+	L18N_WIN_LOCALE_SPANISH_TRADITIONAL = 0x040A,
+	/* ... */
+	L18N_WIN_LOCALE_ZULU = 0x0435
+} l18_win_locales_t;
+
+const char *str_l18_win_locale(l18_win_locales_t);
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/c/include/loader/loader.h
===================================================================
--- uspace/lib/c/include/loader/loader.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/loader/loader.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -40,9 +40,7 @@
 #include <vfs/vfs.h>
 
-/** Abstraction of a loader connection */
-typedef struct {
-	/** ID of the phone connected to the loader. */
-	int phone_id;
-} loader_t;
+/** Forward declararion */
+struct loader;
+typedef struct loader loader_t;
 
 extern int loader_spawn(const char *);
Index: uspace/lib/c/include/ns.h
===================================================================
--- uspace/lib/c/include/ns.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/c/include/ns.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2006 Ondrej Palkovsky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+/** @file
+ */
+
+#ifndef LIBC_NS_H_
+#define LIBC_NS_H_
+
+#include <sys/types.h>
+#include <task.h>
+#include <async.h>
+
+extern int service_register(sysarg_t);
+extern async_sess_t *service_connect(exch_mgmt_t, sysarg_t, sysarg_t, sysarg_t);
+extern async_sess_t *service_connect_blocking(exch_mgmt_t, sysarg_t, sysarg_t,
+    sysarg_t);
+
+extern int ns_ping(void);
+extern int ns_intro(task_id_t);
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/c/include/ns_obsolete.h
===================================================================
--- uspace/lib/c/include/ns_obsolete.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/c/include/ns_obsolete.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2006 Ondrej Palkovsky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+/** @file
+ */
+
+#ifndef LIBC_NS_OBSOLETE_H_
+#define LIBC_NS_OBSOLETE_H_
+
+#include <sys/types.h>
+#include <task.h>
+
+extern int service_obsolete_connect(sysarg_t, sysarg_t, sysarg_t);
+extern int service_obsolete_connect_blocking(sysarg_t, sysarg_t,
+    sysarg_t);
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/c/include/stdio.h
===================================================================
--- uspace/lib/c/include/stdio.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/stdio.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -97,47 +97,7 @@
 };
 
-typedef struct {
-	/** Linked list pointer. */
-	link_t link;
-	
-	/** Underlying file descriptor. */
-	int fd;
-	
-	/** Error indicator. */
-	int error;
-	
-	/** End-of-file indicator. */
-	int eof;
-	
-	/** Klog indicator */
-	int klog;
-	
-	/** Phone to the file provider */
-	int phone;
-
-	/**
-	 * Non-zero if the stream needs sync on fflush(). XXX change
-	 * console semantics so that sync is not needed.
-	 */
-	int need_sync;
-
-	/** Buffering type */
-	enum _buffer_type btype;
-
-	/** Buffer */
-	uint8_t *buf;
-
-	/** Buffer size */
-	size_t buf_size;
-
-	/** Buffer state */
-	enum _buffer_state buf_state;
-
-	/** Buffer I/O pointer */
-	uint8_t *buf_head;
-
-	/** Points to end of occupied space when in read mode. */
-	uint8_t *buf_tail;
-} FILE;
+/** Forward declaration */
+struct _IO_FILE;
+typedef struct _IO_FILE FILE;
 
 extern FILE *stdin;
Index: uspace/lib/c/include/sys/time.h
===================================================================
--- uspace/lib/c/include/sys/time.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/sys/time.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -62,4 +62,6 @@
 extern int gettimeofday(struct timeval *tv, struct timezone *tz);
 
+extern void udelay(useconds_t);
+
 #endif
 
Index: uspace/lib/c/include/udebug.h
===================================================================
--- uspace/lib/c/include/udebug.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/udebug.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -38,18 +38,23 @@
 #include <kernel/udebug/udebug.h>
 #include <sys/types.h>
+#include <async.h>
 
 typedef sysarg_t thash_t;
 
-int udebug_begin(int);
-int udebug_end(int);
-int udebug_set_evmask(int, udebug_evmask_t);
-int udebug_thread_read(int, void *, size_t , size_t *, size_t *);
-int udebug_name_read(int, void *, size_t, size_t *, size_t *);
-int udebug_areas_read(int, void *, size_t, size_t *, size_t *);
-int udebug_mem_read(int, void *, uintptr_t, size_t);
-int udebug_args_read(int, thash_t, sysarg_t *);
-int udebug_regs_read(int, thash_t, void *);
-int udebug_go(int, thash_t, udebug_event_t *, sysarg_t *, sysarg_t *);
-int udebug_stop(int, thash_t);
+extern int udebug_begin(async_sess_t *);
+extern int udebug_end(async_sess_t *);
+extern int udebug_set_evmask(async_sess_t *, udebug_evmask_t);
+extern int udebug_thread_read(async_sess_t *, void *, size_t , size_t *,
+    size_t *);
+extern int udebug_name_read(async_sess_t *, void *, size_t, size_t *,
+    size_t *);
+extern int udebug_areas_read(async_sess_t *, void *, size_t, size_t *,
+    size_t *);
+extern int udebug_mem_read(async_sess_t *, void *, uintptr_t, size_t);
+extern int udebug_args_read(async_sess_t *, thash_t, sysarg_t *);
+extern int udebug_regs_read(async_sess_t *, thash_t, void *);
+extern int udebug_go(async_sess_t *, thash_t, udebug_event_t *, sysarg_t *,
+    sysarg_t *);
+extern int udebug_stop(async_sess_t *, thash_t);
 
 #endif
Index: uspace/lib/c/include/vfs/vfs.h
===================================================================
--- uspace/lib/c/include/vfs/vfs.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/c/include/vfs/vfs.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -41,7 +41,9 @@
 #include <stdio.h>
 
-/**
- * This type is a libc version of the VFS triplet.
- * It uniquely identifies a file system node within a file system instance.
+/** Libc version of the VFS triplet.
+ *
+ * Unique identification of a file system node
+ * within a file system instance.
+ *
  */
 typedef struct {
@@ -58,9 +60,7 @@
 
 extern int open_node(fdi_node_t *, int);
-extern int fd_phone(int);
 extern int fd_node(int, fdi_node_t *);
 
 extern FILE *fopen_node(fdi_node_t *, const char *);
-extern int fphone(FILE *);
 extern int fnode(FILE *, fdi_node_t *);
 
Index: uspace/lib/c/include/vfs/vfs_sess.h
===================================================================
--- uspace/lib/c/include/vfs/vfs_sess.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/c/include/vfs/vfs_sess.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2007 Jakub Jermar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+/** @file
+ */
+
+#ifndef LIBC_VFS_SESS_H_
+#define LIBC_VFS_SESS_H_
+
+#include <async.h>
+#include <stdio.h>
+
+extern async_sess_t *fd_session(exch_mgmt_t, int);
+extern async_sess_t *fsession(exch_mgmt_t, FILE *);
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/clui/tinput.c
===================================================================
--- uspace/lib/clui/tinput.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/clui/tinput.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -54,8 +54,8 @@
 static void tinput_sel_all(tinput_t *);
 static void tinput_sel_delete(tinput_t *);
-static void tinput_key_ctrl(tinput_t *, console_event_t *);
-static void tinput_key_shift(tinput_t *, console_event_t *);
-static void tinput_key_ctrl_shift(tinput_t *, console_event_t *);
-static void tinput_key_unmod(tinput_t *, console_event_t *);
+static void tinput_key_ctrl(tinput_t *, kbd_event_t *);
+static void tinput_key_shift(tinput_t *, kbd_event_t *);
+static void tinput_key_ctrl_shift(tinput_t *, kbd_event_t *);
+static void tinput_key_unmod(tinput_t *, kbd_event_t *);
 static void tinput_pre_seek(tinput_t *, bool);
 static void tinput_post_seek(tinput_t *, bool);
@@ -88,7 +88,7 @@
 	tinput_sel_get_bounds(ti, &sa, &sb);
 	
-	console_set_pos(fphone(stdout), (ti->col0 + start) % ti->con_cols,
+	console_set_pos(ti->console, (ti->col0 + start) % ti->con_cols,
 	    ti->row0 + (ti->col0 + start) / ti->con_cols);
-	console_set_style(fphone(stdout), STYLE_NORMAL);
+	console_set_style(ti->console, STYLE_NORMAL);
 	
 	size_t p = start;
@@ -101,6 +101,7 @@
 	
 	if (p < sb) {
-		fflush(stdout);
-		console_set_style(fphone(stdout), STYLE_SELECTED);
+		console_flush(ti->console);
+		console_set_style(ti->console, STYLE_SELECTED);
+		
 		memcpy(dbuf, ti->buffer + p,
 		    (sb - p) * sizeof(wchar_t));
@@ -110,6 +111,6 @@
 	}
 	
-	fflush(stdout);
-	console_set_style(fphone(stdout), STYLE_NORMAL);
+	console_flush(ti->console);
+	console_set_style(ti->console, STYLE_NORMAL);
 	
 	if (p < ti->nc) {
@@ -123,5 +124,5 @@
 		putchar(' ');
 	
-	fflush(stdout);
+	console_flush(ti->console);
 }
 
@@ -133,5 +134,5 @@
 static void tinput_position_caret(tinput_t *ti)
 {
-	console_set_pos(fphone(stdout), (ti->col0 + ti->pos) % ti->con_cols,
+	console_set_pos(ti->console, (ti->col0 + ti->pos) % ti->con_cols,
 	    ti->row0 + (ti->col0 + ti->pos) / ti->con_cols);
 }
@@ -516,4 +517,5 @@
 static void tinput_init(tinput_t *ti)
 {
+	ti->console = console_init(stdin, stdout);
 	ti->hnum = 0;
 	ti->hpos = 0;
@@ -533,9 +535,9 @@
 int tinput_read(tinput_t *ti, char **dstr)
 {
-	fflush(stdout);
-	if (console_get_size(fphone(stdin), &ti->con_cols, &ti->con_rows) != EOK)
+	console_flush(ti->console);
+	if (console_get_size(ti->console, &ti->con_cols, &ti->con_rows) != EOK)
 		return EIO;
 	
-	if (console_get_pos(fphone(stdin), &ti->col0, &ti->row0) != EOK)
+	if (console_get_pos(ti->console, &ti->col0, &ti->row0) != EOK)
 		return EIO;
 	
@@ -548,8 +550,8 @@
 	
 	while (!ti->done) {
-		fflush(stdout);
-		
-		console_event_t ev;
-		if (!console_get_event(fphone(stdin), &ev))
+		console_flush(ti->console);
+		
+		kbd_event_t ev;
+		if (!console_get_kbd_event(ti->console, &ev))
 			return EIO;
 		
@@ -596,5 +598,5 @@
 }
 
-static void tinput_key_ctrl(tinput_t *ti, console_event_t *ev)
+static void tinput_key_ctrl(tinput_t *ti, kbd_event_t *ev)
 {
 	switch (ev->key) {
@@ -635,5 +637,5 @@
 }
 
-static void tinput_key_ctrl_shift(tinput_t *ti, console_event_t *ev)
+static void tinput_key_ctrl_shift(tinput_t *ti, kbd_event_t *ev)
 {
 	switch (ev->key) {
@@ -655,5 +657,5 @@
 }
 
-static void tinput_key_shift(tinput_t *ti, console_event_t *ev)
+static void tinput_key_shift(tinput_t *ti, kbd_event_t *ev)
 {
 	switch (ev->key) {
@@ -681,5 +683,5 @@
 }
 
-static void tinput_key_unmod(tinput_t *ti, console_event_t *ev)
+static void tinput_key_unmod(tinput_t *ti, kbd_event_t *ev)
 {
 	switch (ev->key) {
Index: uspace/lib/clui/tinput.h
===================================================================
--- uspace/lib/clui/tinput.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/clui/tinput.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -37,4 +37,9 @@
 #define LIBCLUI_TINPUT_H_
 
+#include <stdio.h>
+#include <async.h>
+#include <inttypes.h>
+#include <io/console.h>
+
 #define HISTORY_LEN     10
 #define INPUT_MAX_SIZE  1024
@@ -45,4 +50,7 @@
  */
 typedef struct {
+	/** Console */
+	console_ctrl_t *console;
+	
 	/** Buffer holding text currently being edited */
 	wchar_t buffer[INPUT_MAX_SIZE + 1];
Index: uspace/lib/drv/Makefile
===================================================================
--- uspace/lib/drv/Makefile	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/drv/Makefile	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -29,5 +29,5 @@
 
 USPACE_PREFIX = ../..
-EXTRA_CFLAGS = -Iinclude
+EXTRA_CFLAGS = -Iinclude -I$(LIBUSB_PREFIX)/include
 LIBRARY = libdrv
 
@@ -37,5 +37,9 @@
 	generic/log.c \
 	generic/remote_hw_res.c \
-	generic/remote_char_dev.c
+	generic/remote_char_dev.c \
+	generic/remote_usb.c \
+	generic/remote_pci.c \
+	generic/remote_usbhc.c \
+	generic/remote_usbhid.c
 
 include $(USPACE_PREFIX)/Makefile.common
Index: uspace/lib/drv/generic/dev_iface.c
===================================================================
--- uspace/lib/drv/generic/dev_iface.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/drv/generic/dev_iface.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -41,9 +41,19 @@
 #include "remote_hw_res.h"
 #include "remote_char_dev.h"
+#include "remote_usb.h"
+#include "remote_usbhc.h"
+#include "remote_usbhid.h"
+#include "remote_pci.h"
+
+#include <stdio.h>
 
 static iface_dipatch_table_t remote_ifaces = {
 	.ifaces = {
 		&remote_hw_res_iface,
-		&remote_char_dev_iface
+		&remote_char_dev_iface,
+		&remote_pci_iface,
+		&remote_usb_iface,
+		&remote_usbhc_iface,
+		&remote_usbhid_iface
 	}
 };
Index: uspace/lib/drv/generic/driver.c
===================================================================
--- uspace/lib/drv/generic/driver.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/drv/generic/driver.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -285,13 +285,12 @@
 	async_answer_0(iid, EOK);
 	
-	bool cont = true;
-	while (cont) {
+	while (true) {
 		ipc_call_t call;
 		ipc_callid_t callid = async_get_call(&call);
 		
+		if (!IPC_GET_IMETHOD(call))
+			break;
+		
 		switch (IPC_GET_IMETHOD(call)) {
-		case IPC_M_PHONE_HUNGUP:
-			cont = false;
-			continue;
 		case DRIVER_ADD_DEVICE:
 			driver_add_device(callid, &call);
@@ -303,9 +302,9 @@
 }
 
-/**
- * Generic client connection handler both for applications and drivers.
- *
- * @param drv		True for driver client, false for other clients
- *			(applications, services etc.).
+/** Generic client connection handler both for applications and drivers.
+ *
+ * @param drv True for driver client, false for other clients
+ *            (applications, services, etc.).
+ *
  */
 static void driver_connection_gen(ipc_callid_t iid, ipc_call_t *icall, bool drv)
@@ -317,5 +316,5 @@
 	devman_handle_t handle = IPC_GET_ARG2(*icall);
 	ddf_fun_t *fun = driver_get_function(&functions, handle);
-
+	
 	if (fun == NULL) {
 		printf("%s: driver_connection_gen error - no function with handle"
@@ -325,5 +324,4 @@
 	}
 	
-	
 	/*
 	 * TODO - if the client is not a driver, check whether it is allowed to
@@ -340,13 +338,11 @@
 		return;
 	
-	while (1) {
+	while (true) {
 		ipc_callid_t callid;
 		ipc_call_t call;
 		callid = async_get_call(&call);
 		sysarg_t method = IPC_GET_IMETHOD(call);
-		int iface_idx;
-		
-		switch  (method) {
-		case IPC_M_PHONE_HUNGUP:
+		
+		if (!method) {
 			/* Close device function */
 			if (fun->ops != NULL && fun->ops->close != NULL)
@@ -354,69 +350,68 @@
 			async_answer_0(callid, EOK);
 			return;
-		default:
-			/* convert ipc interface id to interface index */
-			
-			iface_idx = DEV_IFACE_IDX(method);
-			
-			if (!is_valid_iface_idx(iface_idx)) {
-				remote_handler_t *default_handler =
-				    function_get_default_handler(fun);
-				if (default_handler != NULL) {
-					(*default_handler)(fun, callid, &call);
-					break;
-				}
-				
-				/*
-				 * Function has no such interface and
-				 * default handler is not provided.
-				 */
-				printf("%s: driver_connection_gen error - "
-				    "invalid interface id %d.",
-				    driver->name, iface_idx);
-				async_answer_0(callid, ENOTSUP);
-				break;
-			}
-			
-			/* calling one of the function's interfaces */
-			
-			/* Get the interface ops structure. */
-			void *ops = function_get_ops(fun, iface_idx);
-			if (ops == NULL) {
-				printf("%s: driver_connection_gen error - ",
-				    driver->name);
-				printf("Function with handle %" PRIun " has no interface "
-				    "with id %d.\n", handle, iface_idx);
-				async_answer_0(callid, ENOTSUP);
+		}
+		
+		/* Convert ipc interface id to interface index */
+		
+		int iface_idx = DEV_IFACE_IDX(method);
+		
+		if (!is_valid_iface_idx(iface_idx)) {
+			remote_handler_t *default_handler =
+			    function_get_default_handler(fun);
+			if (default_handler != NULL) {
+				(*default_handler)(fun, callid, &call);
 				break;
 			}
 			
 			/*
-			 * Get the corresponding interface for remote request
-			 * handling ("remote interface").
+			 * Function has no such interface and
+			 * default handler is not provided.
 			 */
-			remote_iface_t *rem_iface = get_remote_iface(iface_idx);
-			assert(rem_iface != NULL);
-			
-			/* get the method of the remote interface */
-			sysarg_t iface_method_idx = IPC_GET_ARG1(call);
-			remote_iface_func_ptr_t iface_method_ptr =
-			    get_remote_method(rem_iface, iface_method_idx);
-			if (iface_method_ptr == NULL) {
-				/* The interface has not such method */
-				printf("%s: driver_connection_gen error - "
-				    "invalid interface method.", driver->name);
-				async_answer_0(callid, ENOTSUP);
-				break;
-			}
-			
-			/*
-			 * Call the remote interface's method, which will
-			 * receive parameters from the remote client and it will
-			 * pass it to the corresponding local interface method
-			 * associated with the function by its driver.
-			 */
-			(*iface_method_ptr)(fun, ops, callid, &call);
+			printf("%s: driver_connection_gen error - "
+			    "invalid interface id %d.",
+			    driver->name, iface_idx);
+			async_answer_0(callid, ENOTSUP);
 			break;
 		}
+		
+		/* Calling one of the function's interfaces */
+		
+		/* Get the interface ops structure. */
+		void *ops = function_get_ops(fun, iface_idx);
+		if (ops == NULL) {
+			printf("%s: driver_connection_gen error - ", driver->name);
+			printf("Function with handle %" PRIun " has no interface "
+			    "with id %d.\n", handle, iface_idx);
+			async_answer_0(callid, ENOTSUP);
+			break;
+		}
+		
+		/*
+		 * Get the corresponding interface for remote request
+		 * handling ("remote interface").
+		 */
+		remote_iface_t *rem_iface = get_remote_iface(iface_idx);
+		assert(rem_iface != NULL);
+		
+		/* get the method of the remote interface */
+		sysarg_t iface_method_idx = IPC_GET_ARG1(call);
+		remote_iface_func_ptr_t iface_method_ptr =
+		    get_remote_method(rem_iface, iface_method_idx);
+		if (iface_method_ptr == NULL) {
+			/* The interface has not such method */
+			printf("%s: driver_connection_gen error - "
+			    "invalid interface method.", driver->name);
+			async_answer_0(callid, ENOTSUP);
+			break;
+		}
+		
+		/*
+		 * Call the remote interface's method, which will
+		 * receive parameters from the remote client and it will
+		 * pass it to the corresponding local interface method
+		 * associated with the function by its driver.
+		 */
+		(*iface_method_ptr)(fun, ops, callid, &call);
+		break;
 	}
 }
Index: uspace/lib/drv/generic/remote_pci.c
===================================================================
--- uspace/lib/drv/generic/remote_pci.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/drv/generic/remote_pci.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,179 @@
+/*
+ * Copyright (c) 2011 Jan Vesely
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libdrv
+ * @{
+ */
+/** @file
+ */
+#include <assert.h>
+#include <async.h>
+#include <errno.h>
+
+#include "pci_dev_iface.h"
+#include "ddf/driver.h"
+
+static void remote_config_space_read_8(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_config_space_read_16(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_config_space_read_32(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+
+static void remote_config_space_write_8(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_config_space_write_16(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_config_space_write_32(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+
+/** Remote USB interface operations. */
+static remote_iface_func_ptr_t remote_pci_iface_ops [] = {
+	remote_config_space_read_8,
+	remote_config_space_read_16,
+	remote_config_space_read_32,
+
+	remote_config_space_write_8,
+	remote_config_space_write_16,
+	remote_config_space_write_32
+};
+
+/** Remote USB interface structure.
+ */
+remote_iface_t remote_pci_iface = {
+	.method_count = sizeof(remote_pci_iface_ops) /
+	    sizeof(remote_pci_iface_ops[0]),
+	.methods = remote_pci_iface_ops
+};
+
+void remote_config_space_read_8(ddf_fun_t *fun, void *iface, ipc_callid_t callid, ipc_call_t *call)
+{
+	assert(iface);
+	pci_dev_iface_t *pci_iface = (pci_dev_iface_t *)iface;
+	if (pci_iface->config_space_read_8 == NULL) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+	uint32_t address = DEV_IPC_GET_ARG1(*call);
+	uint8_t value;
+	int ret = pci_iface->config_space_read_8(fun, address, &value);
+	if (ret != EOK) {
+		async_answer_0(callid, ret);
+	} else {
+		async_answer_1(callid, EOK, value);
+	}
+}
+
+void remote_config_space_read_16(ddf_fun_t *fun, void *iface, ipc_callid_t callid, ipc_call_t *call)
+{
+	assert(iface);
+	pci_dev_iface_t *pci_iface = (pci_dev_iface_t *)iface;
+	if (pci_iface->config_space_read_16 == NULL) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+	uint32_t address = DEV_IPC_GET_ARG1(*call);
+	uint16_t value;
+	int ret = pci_iface->config_space_read_16(fun, address, &value);
+	if (ret != EOK) {
+		async_answer_0(callid, ret);
+	} else {
+		async_answer_1(callid, EOK, value);
+	}
+}
+void remote_config_space_read_32(ddf_fun_t *fun, void *iface, ipc_callid_t callid, ipc_call_t *call)
+{
+	assert(iface);
+	pci_dev_iface_t *pci_iface = (pci_dev_iface_t *)iface;
+	if (pci_iface->config_space_read_32 == NULL) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+	uint32_t address = DEV_IPC_GET_ARG1(*call);
+	uint32_t value;
+	int ret = pci_iface->config_space_read_32(fun, address, &value);
+	if (ret != EOK) {
+		async_answer_0(callid, ret);
+	} else {
+		async_answer_1(callid, EOK, value);
+	}
+}
+
+void remote_config_space_write_8(ddf_fun_t *fun, void *iface, ipc_callid_t callid, ipc_call_t *call)
+{
+	assert(iface);
+	pci_dev_iface_t *pci_iface = (pci_dev_iface_t *)iface;
+	if (pci_iface->config_space_write_8 == NULL) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+	uint32_t address = DEV_IPC_GET_ARG1(*call);
+	uint8_t value = DEV_IPC_GET_ARG2(*call);
+	int ret = pci_iface->config_space_write_8(fun, address, value);
+	if (ret != EOK) {
+		async_answer_0(callid, ret);
+	} else {
+		async_answer_0(callid, EOK);
+	}
+}
+
+void remote_config_space_write_16(ddf_fun_t *fun, void *iface, ipc_callid_t callid, ipc_call_t *call)
+{
+	assert(iface);
+	pci_dev_iface_t *pci_iface = (pci_dev_iface_t *)iface;
+	if (pci_iface->config_space_write_16 == NULL) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+	uint32_t address = DEV_IPC_GET_ARG1(*call);
+	uint16_t value = DEV_IPC_GET_ARG2(*call);
+	int ret = pci_iface->config_space_write_16(fun, address, value);
+	if (ret != EOK) {
+		async_answer_0(callid, ret);
+	} else {
+		async_answer_0(callid, EOK);
+	}
+}
+
+void remote_config_space_write_32(ddf_fun_t *fun, void *iface, ipc_callid_t callid, ipc_call_t *call)
+{
+	assert(iface);
+	pci_dev_iface_t *pci_iface = (pci_dev_iface_t *)iface;
+	if (pci_iface->config_space_write_32 == NULL) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+	uint32_t address = DEV_IPC_GET_ARG1(*call);
+	uint32_t value = DEV_IPC_GET_ARG2(*call);
+	int ret = pci_iface->config_space_write_32(fun, address, value);
+	if (ret != EOK) {
+		async_answer_0(callid, ret);
+	} else {
+		async_answer_0(callid, EOK);
+	}
+}
+
+
+/**
+ * @}
+ */
+
Index: uspace/lib/drv/generic/remote_usb.c
===================================================================
--- uspace/lib/drv/generic/remote_usb.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/drv/generic/remote_usb.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 2010 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libdrv
+ * @{
+ */
+/** @file
+ */
+
+#include <async.h>
+#include <errno.h>
+
+#include "usb_iface.h"
+#include "ddf/driver.h"
+
+
+static void remote_usb_get_address(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usb_get_interface(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usb_get_hc_handle(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+//static void remote_usb(device_t *, void *, ipc_callid_t, ipc_call_t *);
+
+/** Remote USB interface operations. */
+static remote_iface_func_ptr_t remote_usb_iface_ops [] = {
+	remote_usb_get_address,
+	remote_usb_get_interface,
+	remote_usb_get_hc_handle
+};
+
+/** Remote USB interface structure.
+ */
+remote_iface_t remote_usb_iface = {
+	.method_count = sizeof(remote_usb_iface_ops) /
+	    sizeof(remote_usb_iface_ops[0]),
+	.methods = remote_usb_iface_ops
+};
+
+
+void remote_usb_get_address(ddf_fun_t *fun, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	usb_iface_t *usb_iface = (usb_iface_t *) iface;
+
+	if (usb_iface->get_address == NULL) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+
+	devman_handle_t handle = DEV_IPC_GET_ARG1(*call);
+
+	usb_address_t address;
+	int rc = usb_iface->get_address(fun, handle, &address);
+	if (rc != EOK) {
+		async_answer_0(callid, rc);
+	} else {
+		async_answer_1(callid, EOK, address);
+	}
+}
+
+void remote_usb_get_interface(ddf_fun_t *fun, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	usb_iface_t *usb_iface = (usb_iface_t *) iface;
+
+	if (usb_iface->get_interface == NULL) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+
+	devman_handle_t handle = DEV_IPC_GET_ARG1(*call);
+
+	int iface_no;
+	int rc = usb_iface->get_interface(fun, handle, &iface_no);
+	if (rc != EOK) {
+		async_answer_0(callid, rc);
+	} else {
+		async_answer_1(callid, EOK, iface_no);
+	}
+}
+
+void remote_usb_get_hc_handle(ddf_fun_t *fun, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	usb_iface_t *usb_iface = (usb_iface_t *) iface;
+
+	if (usb_iface->get_hc_handle == NULL) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+
+	devman_handle_t handle;
+	int rc = usb_iface->get_hc_handle(fun, &handle);
+	if (rc != EOK) {
+		async_answer_0(callid, rc);
+	}
+
+	async_answer_1(callid, EOK, (sysarg_t) handle);
+}
+
+
+
+/**
+ * @}
+ */
Index: uspace/lib/drv/generic/remote_usbhc.c
===================================================================
--- uspace/lib/drv/generic/remote_usbhc.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/drv/generic/remote_usbhc.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,583 @@
+/*
+ * Copyright (c) 2010-2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libdrv
+ * @{
+ */
+/** @file
+ */
+
+#include <async.h>
+#include <errno.h>
+#include <assert.h>
+
+#include "usbhc_iface.h"
+#include "ddf/driver.h"
+
+#define USB_MAX_PAYLOAD_SIZE 1020
+#define HACK_MAX_PACKET_SIZE 8
+#define HACK_MAX_PACKET_SIZE_INTERRUPT_IN 4
+
+static void remote_usbhc_interrupt_out(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usbhc_interrupt_in(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usbhc_bulk_out(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usbhc_bulk_in(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usbhc_control_write(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usbhc_control_read(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usbhc_request_address(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usbhc_bind_address(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usbhc_find_by_address(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usbhc_release_address(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usbhc_register_endpoint(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usbhc_unregister_endpoint(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+//static void remote_usbhc(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+
+/** Remote USB host controller interface operations. */
+static remote_iface_func_ptr_t remote_usbhc_iface_ops [] = {
+	remote_usbhc_request_address,
+	remote_usbhc_bind_address,
+	remote_usbhc_find_by_address,
+	remote_usbhc_release_address,
+
+	remote_usbhc_interrupt_out,
+	remote_usbhc_interrupt_in,
+
+	remote_usbhc_bulk_out,
+	remote_usbhc_bulk_in,
+
+	remote_usbhc_control_write,
+	remote_usbhc_control_read,
+
+	remote_usbhc_register_endpoint,
+	remote_usbhc_unregister_endpoint
+};
+
+/** Remote USB host controller interface structure.
+ */
+remote_iface_t remote_usbhc_iface = {
+	.method_count = sizeof(remote_usbhc_iface_ops) /
+	    sizeof(remote_usbhc_iface_ops[0]),
+	.methods = remote_usbhc_iface_ops
+};
+
+typedef struct {
+	ipc_callid_t caller;
+	ipc_callid_t data_caller;
+	void *buffer;
+	void *setup_packet;
+	size_t size;
+} async_transaction_t;
+
+static void async_transaction_destroy(async_transaction_t *trans)
+{
+	if (trans == NULL) {
+		return;
+	}
+
+	if (trans->setup_packet != NULL) {
+		free(trans->setup_packet);
+	}
+	if (trans->buffer != NULL) {
+		free(trans->buffer);
+	}
+
+	free(trans);
+}
+
+static async_transaction_t *async_transaction_create(ipc_callid_t caller)
+{
+	async_transaction_t *trans = malloc(sizeof(async_transaction_t));
+	if (trans == NULL) {
+		return NULL;
+	}
+
+	trans->caller = caller;
+	trans->data_caller = 0;
+	trans->buffer = NULL;
+	trans->setup_packet = NULL;
+	trans->size = 0;
+
+	return trans;
+}
+
+void remote_usbhc_request_address(ddf_fun_t *fun, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
+
+	if (!usb_iface->request_address) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+	
+	usb_speed_t speed = DEV_IPC_GET_ARG1(*call);
+
+	usb_address_t address;
+	int rc = usb_iface->request_address(fun, speed, &address);
+	if (rc != EOK) {
+		async_answer_0(callid, rc);
+	} else {
+		async_answer_1(callid, EOK, (sysarg_t) address);
+	}
+}
+
+void remote_usbhc_bind_address(ddf_fun_t *fun, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
+
+	if (!usb_iface->bind_address) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+
+	usb_address_t address = (usb_address_t) DEV_IPC_GET_ARG1(*call);
+	devman_handle_t handle = (devman_handle_t) DEV_IPC_GET_ARG2(*call);
+
+	int rc = usb_iface->bind_address(fun, address, handle);
+
+	async_answer_0(callid, rc);
+}
+
+void remote_usbhc_find_by_address(ddf_fun_t *fun, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
+
+	if (!usb_iface->find_by_address) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+
+	usb_address_t address = (usb_address_t) DEV_IPC_GET_ARG1(*call);
+	devman_handle_t handle;
+	int rc = usb_iface->find_by_address(fun, address, &handle);
+
+	if (rc == EOK) {
+		async_answer_1(callid, EOK, handle);
+	} else {
+		async_answer_0(callid, rc);
+	}
+}
+
+void remote_usbhc_release_address(ddf_fun_t *fun, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
+
+	if (!usb_iface->release_address) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+
+	usb_address_t address = (usb_address_t) DEV_IPC_GET_ARG1(*call);
+
+	int rc = usb_iface->release_address(fun, address);
+
+	async_answer_0(callid, rc);
+}
+
+
+static void callback_out(ddf_fun_t *fun,
+    int outcome, void *arg)
+{
+	async_transaction_t *trans = (async_transaction_t *)arg;
+
+	async_answer_0(trans->caller, outcome);
+
+	async_transaction_destroy(trans);
+}
+
+static void callback_in(ddf_fun_t *fun,
+    int outcome, size_t actual_size, void *arg)
+{
+	async_transaction_t *trans = (async_transaction_t *)arg;
+
+	if (outcome != EOK) {
+		async_answer_0(trans->caller, outcome);
+		if (trans->data_caller) {
+			async_answer_0(trans->data_caller, EINTR);
+		}
+		async_transaction_destroy(trans);
+		return;
+	}
+
+	trans->size = actual_size;
+
+	if (trans->data_caller) {
+		async_data_read_finalize(trans->data_caller,
+		    trans->buffer, actual_size);
+	}
+
+	async_answer_0(trans->caller, EOK);
+
+	async_transaction_destroy(trans);
+}
+
+/** Process an outgoing transfer (both OUT and SETUP).
+ *
+ * @param device Target device.
+ * @param callid Initiating caller.
+ * @param call Initiating call.
+ * @param transfer_func Transfer function (might be NULL).
+ */
+static void remote_usbhc_out_transfer(ddf_fun_t *fun,
+    ipc_callid_t callid, ipc_call_t *call,
+    usbhc_iface_transfer_out_t transfer_func)
+{
+	if (!transfer_func) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+
+	usb_target_t target = {
+		.address = DEV_IPC_GET_ARG1(*call),
+		.endpoint = DEV_IPC_GET_ARG2(*call)
+	};
+
+	size_t len = 0;
+	void *buffer = NULL;
+
+	int rc = async_data_write_accept(&buffer, false,
+	    1, USB_MAX_PAYLOAD_SIZE,
+	    0, &len);
+
+	if (rc != EOK) {
+		async_answer_0(callid, rc);
+		return;
+	}
+
+	async_transaction_t *trans = async_transaction_create(callid);
+	if (trans == NULL) {
+		if (buffer != NULL) {
+			free(buffer);
+		}
+		async_answer_0(callid, ENOMEM);
+		return;
+	}
+
+	trans->buffer = buffer;
+	trans->size = len;
+
+	rc = transfer_func(fun, target,
+	    buffer, len,
+	    callback_out, trans);
+
+	if (rc != EOK) {
+		async_answer_0(callid, rc);
+		async_transaction_destroy(trans);
+	}
+}
+
+/** Process an incoming transfer.
+ *
+ * @param device Target device.
+ * @param callid Initiating caller.
+ * @param call Initiating call.
+ * @param transfer_func Transfer function (might be NULL).
+ */
+static void remote_usbhc_in_transfer(ddf_fun_t *fun,
+    ipc_callid_t callid, ipc_call_t *call,
+    usbhc_iface_transfer_in_t transfer_func)
+{
+	if (!transfer_func) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+
+	usb_target_t target = {
+		.address = DEV_IPC_GET_ARG1(*call),
+		.endpoint = DEV_IPC_GET_ARG2(*call)
+	};
+
+	size_t len;
+	ipc_callid_t data_callid;
+	if (!async_data_read_receive(&data_callid, &len)) {
+		async_answer_0(callid, EPARTY);
+		return;
+	}
+
+	async_transaction_t *trans = async_transaction_create(callid);
+	if (trans == NULL) {
+		async_answer_0(data_callid, ENOMEM);
+		async_answer_0(callid, ENOMEM);
+		return;
+	}
+	trans->data_caller = data_callid;
+	trans->buffer = malloc(len);
+	trans->size = len;
+
+	int rc = transfer_func(fun, target,
+	    trans->buffer, len,
+	    callback_in, trans);
+
+	if (rc != EOK) {
+		async_answer_0(data_callid, rc);
+		async_answer_0(callid, rc);
+		async_transaction_destroy(trans);
+	}
+}
+
+void remote_usbhc_interrupt_out(ddf_fun_t *fun, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
+	assert(usb_iface != NULL);
+
+	return remote_usbhc_out_transfer(fun, callid, call,
+	    usb_iface->interrupt_out);
+}
+
+void remote_usbhc_interrupt_in(ddf_fun_t *fun, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
+	assert(usb_iface != NULL);
+
+	return remote_usbhc_in_transfer(fun, callid, call,
+	    usb_iface->interrupt_in);
+}
+
+void remote_usbhc_bulk_out(ddf_fun_t *fun, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
+	assert(usb_iface != NULL);
+
+	return remote_usbhc_out_transfer(fun, callid, call,
+	    usb_iface->bulk_out);
+}
+
+void remote_usbhc_bulk_in(ddf_fun_t *fun, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
+	assert(usb_iface != NULL);
+
+	return remote_usbhc_in_transfer(fun, callid, call,
+	    usb_iface->bulk_in);
+}
+
+void remote_usbhc_control_write(ddf_fun_t *fun, void *iface,
+ipc_callid_t callid, ipc_call_t *call)
+{
+	usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
+	assert(usb_iface != NULL);
+
+	if (!usb_iface->control_write) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+
+	usb_target_t target = {
+		.address = DEV_IPC_GET_ARG1(*call),
+		.endpoint = DEV_IPC_GET_ARG2(*call)
+	};
+	size_t data_buffer_len = DEV_IPC_GET_ARG3(*call);
+
+	int rc;
+
+	void *setup_packet = NULL;
+	void *data_buffer = NULL;
+	size_t setup_packet_len = 0;
+
+	rc = async_data_write_accept(&setup_packet, false,
+	    1, USB_MAX_PAYLOAD_SIZE, 0, &setup_packet_len);
+	if (rc != EOK) {
+		async_answer_0(callid, rc);
+		return;
+	}
+
+	if (data_buffer_len > 0) {
+		rc = async_data_write_accept(&data_buffer, false,
+		    1, USB_MAX_PAYLOAD_SIZE, 0, &data_buffer_len);
+		if (rc != EOK) {
+			async_answer_0(callid, rc);
+			free(setup_packet);
+			return;
+		}
+	}
+
+	async_transaction_t *trans = async_transaction_create(callid);
+	if (trans == NULL) {
+		async_answer_0(callid, ENOMEM);
+		free(setup_packet);
+		free(data_buffer);
+		return;
+	}
+	trans->setup_packet = setup_packet;
+	trans->buffer = data_buffer;
+	trans->size = data_buffer_len;
+
+	rc = usb_iface->control_write(fun, target,
+	    setup_packet, setup_packet_len,
+	    data_buffer, data_buffer_len,
+	    callback_out, trans);
+
+	if (rc != EOK) {
+		async_answer_0(callid, rc);
+		async_transaction_destroy(trans);
+	}
+}
+
+
+void remote_usbhc_control_read(ddf_fun_t *fun, void *iface,
+ipc_callid_t callid, ipc_call_t *call)
+{
+	usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
+	assert(usb_iface != NULL);
+
+	if (!usb_iface->control_read) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+
+	usb_target_t target = {
+		.address = DEV_IPC_GET_ARG1(*call),
+		.endpoint = DEV_IPC_GET_ARG2(*call)
+	};
+
+	int rc;
+
+	void *setup_packet = NULL;
+	size_t setup_packet_len = 0;
+	size_t data_len = 0;
+
+	rc = async_data_write_accept(&setup_packet, false,
+	    1, USB_MAX_PAYLOAD_SIZE, 0, &setup_packet_len);
+	if (rc != EOK) {
+		async_answer_0(callid, rc);
+		return;
+	}
+
+	ipc_callid_t data_callid;
+	if (!async_data_read_receive(&data_callid, &data_len)) {
+		async_answer_0(callid, EPARTY);
+		free(setup_packet);
+		return;
+	}
+
+	async_transaction_t *trans = async_transaction_create(callid);
+	if (trans == NULL) {
+		async_answer_0(data_callid, ENOMEM);
+		async_answer_0(callid, ENOMEM);
+		free(setup_packet);
+		return;
+	}
+	trans->data_caller = data_callid;
+	trans->setup_packet = setup_packet;
+	trans->size = data_len;
+	trans->buffer = malloc(data_len);
+	if (trans->buffer == NULL) {
+		async_answer_0(data_callid, ENOMEM);
+		async_answer_0(callid, ENOMEM);
+		async_transaction_destroy(trans);
+		return;
+	}
+
+	rc = usb_iface->control_read(fun, target,
+	    setup_packet, setup_packet_len,
+	    trans->buffer, trans->size,
+	    callback_in, trans);
+
+	if (rc != EOK) {
+		async_answer_0(data_callid, rc);
+		async_answer_0(callid, rc);
+		async_transaction_destroy(trans);
+	}
+}
+
+
+void remote_usbhc_register_endpoint(ddf_fun_t *fun, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
+
+	if (!usb_iface->register_endpoint) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+
+#define _INIT_FROM_HIGH_DATA2(type, var, arg_no) \
+	type var = (type) DEV_IPC_GET_ARG##arg_no(*call) / (1 << 16)
+#define _INIT_FROM_LOW_DATA2(type, var, arg_no) \
+	type var = (type) DEV_IPC_GET_ARG##arg_no(*call) % (1 << 16)
+#define _INIT_FROM_HIGH_DATA3(type, var, arg_no) \
+	type var = (type) DEV_IPC_GET_ARG##arg_no(*call) / (1 << 16)
+#define _INIT_FROM_MIDDLE_DATA3(type, var, arg_no) \
+	type var = (type) (DEV_IPC_GET_ARG##arg_no(*call) / (1 << 8)) % (1 << 8)
+#define _INIT_FROM_LOW_DATA3(type, var, arg_no) \
+	type var = (type) DEV_IPC_GET_ARG##arg_no(*call) % (1 << 8)
+
+	_INIT_FROM_HIGH_DATA2(usb_address_t, address, 1);
+	_INIT_FROM_LOW_DATA2(usb_endpoint_t, endpoint, 1);
+
+	_INIT_FROM_HIGH_DATA3(usb_speed_t, speed, 2);
+	_INIT_FROM_MIDDLE_DATA3(usb_transfer_type_t, transfer_type, 2);
+	_INIT_FROM_LOW_DATA3(usb_direction_t, direction, 2);
+
+	_INIT_FROM_HIGH_DATA2(size_t, max_packet_size, 3);
+	_INIT_FROM_LOW_DATA2(unsigned int, interval, 3);
+
+#undef _INIT_FROM_HIGH_DATA2
+#undef _INIT_FROM_LOW_DATA2
+#undef _INIT_FROM_HIGH_DATA3
+#undef _INIT_FROM_MIDDLE_DATA3
+#undef _INIT_FROM_LOW_DATA3
+
+	int rc = usb_iface->register_endpoint(fun, address, speed, endpoint,
+	    transfer_type, direction, max_packet_size, interval);
+
+	async_answer_0(callid, rc);
+}
+
+
+void remote_usbhc_unregister_endpoint(ddf_fun_t *fun, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
+
+	if (!usb_iface->unregister_endpoint) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+
+	usb_address_t address = (usb_address_t) DEV_IPC_GET_ARG1(*call);
+	usb_endpoint_t endpoint = (usb_endpoint_t) DEV_IPC_GET_ARG2(*call);
+	usb_direction_t direction = (usb_direction_t) DEV_IPC_GET_ARG3(*call);
+
+	int rc = usb_iface->unregister_endpoint(fun,
+	    address, endpoint, direction);
+
+	async_answer_0(callid, rc);
+}
+
+
+/**
+ * @}
+ */
Index: uspace/lib/drv/generic/remote_usbhid.c
===================================================================
--- uspace/lib/drv/generic/remote_usbhid.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/drv/generic/remote_usbhid.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,220 @@
+/*
+ * Copyright (c) 2010-2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libdrv
+ * @{
+ */
+/** @file
+ */
+
+#include <async.h>
+#include <errno.h>
+#include <assert.h>
+#include <stdio.h>
+
+#include "usbhid_iface.h"
+#include "ddf/driver.h"
+
+static void remote_usbhid_get_event_length(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usbhid_get_event(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usbhid_get_report_descriptor_length(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usbhid_get_report_descriptor(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+// static void remote_usbhid_(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
+
+/** Remote USB HID interface operations. */
+static remote_iface_func_ptr_t remote_usbhid_iface_ops [] = {
+	remote_usbhid_get_event_length,
+	remote_usbhid_get_event,
+	remote_usbhid_get_report_descriptor_length,
+	remote_usbhid_get_report_descriptor
+};
+
+/** Remote USB HID interface structure.
+ */
+remote_iface_t remote_usbhid_iface = {
+	.method_count = sizeof(remote_usbhid_iface_ops) /
+	    sizeof(remote_usbhid_iface_ops[0]),
+	.methods = remote_usbhid_iface_ops
+};
+
+//usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
+
+
+void remote_usbhid_get_event_length(ddf_fun_t *fun, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	printf("remote_usbhid_get_event_length()\n");
+	
+	usbhid_iface_t *hid_iface = (usbhid_iface_t *) iface;
+
+	if (!hid_iface->get_event_length) {
+		printf("Get event length not set!\n");
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+
+	size_t len = hid_iface->get_event_length(fun);
+//	if (len == 0) {
+//		len = EEMPTY;
+//	}
+	async_answer_1(callid, EOK, len);
+	
+//	if (len < 0) {
+//		async_answer_0(callid, len);
+//	} else {
+//		async_answer_1(callid, EOK, len);
+//	}
+}
+
+void remote_usbhid_get_event(ddf_fun_t *fun, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	usbhid_iface_t *hid_iface = (usbhid_iface_t *) iface;
+
+	if (!hid_iface->get_event) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+
+	unsigned int flags = DEV_IPC_GET_ARG1(*call);
+
+	size_t len;
+	ipc_callid_t data_callid;
+	if (!async_data_read_receive(&data_callid, &len)) {
+		async_answer_0(callid, EPARTY);
+		return;
+	}
+//	/* Check that length is even number. Truncate otherwise. */
+//	if ((len % 2) == 1) {
+//		len--;
+//	}
+	if (len == 0) {
+		async_answer_0(data_callid, EINVAL);
+		async_answer_0(callid, EINVAL);
+		return;
+	}
+
+	int rc;
+
+	uint8_t *data = malloc(len);
+	if (data == NULL) {
+		async_answer_0(data_callid, ENOMEM);
+		async_answer_0(callid, ENOMEM);
+		return;
+	}
+
+	size_t act_length;
+	int event_nr;
+	rc = hid_iface->get_event(fun, data, len, &act_length, &event_nr, flags);
+	if (rc != EOK) {
+		free(data);
+		async_answer_0(data_callid, rc);
+		async_answer_0(callid, rc);
+		return;
+	}
+	if (act_length >= len) {
+		/* This shall not happen. */
+		// FIXME: how about an assert here?
+		act_length = len;
+	}
+
+	async_data_read_finalize(data_callid, data, act_length);
+
+	free(data);
+
+	async_answer_1(callid, EOK, event_nr);
+}
+
+void remote_usbhid_get_report_descriptor_length(ddf_fun_t *fun, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	usbhid_iface_t *hid_iface = (usbhid_iface_t *) iface;
+
+	if (!hid_iface->get_report_descriptor_length) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+
+	size_t len = hid_iface->get_report_descriptor_length(fun);
+	async_answer_1(callid, EOK, (sysarg_t) len);
+}
+
+void remote_usbhid_get_report_descriptor(ddf_fun_t *fun, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	usbhid_iface_t *hid_iface = (usbhid_iface_t *) iface;
+
+	if (!hid_iface->get_report_descriptor) {
+		async_answer_0(callid, ENOTSUP);
+		return;
+	}
+
+	size_t len;
+	ipc_callid_t data_callid;
+	if (!async_data_read_receive(&data_callid, &len)) {
+		async_answer_0(callid, EINVAL);
+		return;
+	}
+
+	if (len == 0) {
+		async_answer_0(data_callid, EINVAL);
+		async_answer_0(callid, EINVAL);
+		return;
+	}
+
+	uint8_t *descriptor = malloc(len);
+	if (descriptor == NULL) {
+		async_answer_0(data_callid, ENOMEM);
+		async_answer_0(callid, ENOMEM);
+		return;
+	}
+
+	size_t act_len = 0;
+	int rc = hid_iface->get_report_descriptor(fun, descriptor, len,
+	    &act_len);
+	if (act_len > len) {
+		rc = ELIMIT;
+	}
+	if (rc != EOK) {
+		free(descriptor);
+		async_answer_0(data_callid, rc);
+		async_answer_0(callid, rc);
+		return;
+	}
+
+	async_data_read_finalize(data_callid, descriptor, act_len);
+	async_answer_0(callid, EOK);
+
+	free(descriptor);
+}
+
+
+
+/**
+ * @}
+ */
Index: uspace/lib/drv/include/ddf/driver.h
===================================================================
--- uspace/lib/drv/include/ddf/driver.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/drv/include/ddf/driver.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -37,7 +37,7 @@
 #define DDF_DRIVER_H_
 
+#include <async.h>
 #include <ipc/devman.h>
 #include <ipc/dev_iface.h>
-
 #include "../dev_iface.h"
 
@@ -83,8 +83,8 @@
 	
 	/**
-	 * Phone to the parent device driver (if it is different from this
+	 * Session to the parent device driver (if it is different from this
 	 * driver)
 	 */
-	int parent_phone;
+	async_sess_t *parent_sess;
 	
 	/** Device name */
Index: uspace/lib/drv/include/pci_dev_iface.h
===================================================================
--- uspace/lib/drv/include/pci_dev_iface.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/drv/include/pci_dev_iface.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2011 Jan Vesely
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libdrv
+ * @addtogroup usb
+ * @{
+ */
+/** @file
+ * @brief PCI device interface definition.
+ */
+
+#ifndef LIBDRV_PCI_DEV_IFACE_H_
+#define LIBDRV_PCI_DEV_IFACE_H_
+
+#include "ddf/driver.h"
+
+typedef enum {
+	IPC_M_CONFIG_SPACE_READ_8,
+	IPC_M_CONFIG_SPACE_READ_16,
+	IPC_M_CONFIG_SPACE_READ_32,
+
+	IPC_M_CONFIG_SPACE_WRITE_8,
+	IPC_M_CONFIG_SPACE_WRITE_16,
+	IPC_M_CONFIG_SPACE_WRITE_32
+} pci_dev_iface_funcs_t;
+
+/** PCI device communication interface. */
+typedef struct {
+	int (*config_space_read_8)(ddf_fun_t *, uint32_t address, uint8_t *data);
+	int (*config_space_read_16)(ddf_fun_t *, uint32_t address, uint16_t *data);
+	int (*config_space_read_32)(ddf_fun_t *, uint32_t address, uint32_t *data);
+
+	int (*config_space_write_8)(ddf_fun_t *, uint32_t address, uint8_t data);
+	int (*config_space_write_16)(ddf_fun_t *, uint32_t address, uint16_t data);
+	int (*config_space_write_32)(ddf_fun_t *, uint32_t address, uint32_t data);
+} pci_dev_iface_t;
+
+
+#endif
+/**
+ * @}
+ */
+
Index: uspace/lib/drv/include/remote_pci.h
===================================================================
--- uspace/lib/drv/include/remote_pci.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/drv/include/remote_pci.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2011 Jan Vesely
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libdrv
+ * @{
+ */
+/** @file
+ */
+
+#ifndef LIBDRV_REMOTE_PCI_H_
+#define LIBDRV_REMOTE_PCI_H_
+
+extern remote_iface_t remote_pci_iface;
+
+#endif
+
+/**
+ * @}
+ */
+
Index: uspace/lib/drv/include/remote_usb.h
===================================================================
--- uspace/lib/drv/include/remote_usb.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/drv/include/remote_usb.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2010 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libdrv
+ * @{
+ */
+/** @file
+ */
+
+#ifndef LIBDRV_REMOTE_USB_H_
+#define LIBDRV_REMOTE_USB_H_
+
+extern remote_iface_t remote_usb_iface;
+
+#endif
+
+/**
+ * @}
+ */
Index: uspace/lib/drv/include/remote_usbhc.h
===================================================================
--- uspace/lib/drv/include/remote_usbhc.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/drv/include/remote_usbhc.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2010 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libdrv
+ * @{
+ */
+/** @file
+ */
+
+#ifndef LIBDRV_REMOTE_USBHC_H_
+#define LIBDRV_REMOTE_USBHC_H_
+
+extern remote_iface_t remote_usbhc_iface;
+
+#endif
+
+/**
+ * @}
+ */
Index: uspace/lib/drv/include/remote_usbhid.h
===================================================================
--- uspace/lib/drv/include/remote_usbhid.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/drv/include/remote_usbhid.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libdrv
+ * @{
+ */
+/** @file
+ */
+
+#ifndef LIBDRV_REMOTE_USBHID_H_
+#define LIBDRV_REMOTE_USBHID_H_
+
+extern remote_iface_t remote_usbhid_iface;
+
+#endif
+
+/**
+ * @}
+ */
Index: uspace/lib/drv/include/usb_iface.h
===================================================================
--- uspace/lib/drv/include/usb_iface.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/drv/include/usb_iface.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2010 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libdrv
+ * @addtogroup usb
+ * @{
+ */
+/** @file
+ * @brief USB interface definition.
+ */
+
+#ifndef LIBDRV_USB_IFACE_H_
+#define LIBDRV_USB_IFACE_H_
+
+#include "ddf/driver.h"
+#include <usb/usb.h>
+typedef enum {
+	/** Tell USB address assigned to device.
+	 * Parameters:
+	 * - devman handle id
+	 * Answer:
+	 * - EINVAL - unknown handle or handle not managed by this driver
+	 * - ENOTSUP - operation not supported (shall not happen)
+	 * - arbitrary error code if returned by remote implementation
+	 * - EOK - handle found, first parameter contains the USB address
+	 *
+	 * The handle must be the one used for binding USB address with
+	 * it (IPC_M_USBHC_BIND_ADDRESS), otherwise the host controller
+	 * (that this request would eventually reach) would not be able
+	 * to find it.
+	 * The problem is that this handle is actually assigned to the
+	 * function inside driver of the parent device (usually hub driver).
+	 * To bypass this problem, the initial caller specify handle as
+	 * zero and the first parent assigns the actual value.
+	 * See usb_iface_get_address_hub_child_impl() implementation
+	 * that could be assigned to device ops of a child device of in a
+	 * hub driver.
+	 * For example, the USB multi interface device driver (MID)
+	 * passes this initial zero without any modification because the
+	 * handle must be resolved by its parent.
+	 */
+	IPC_M_USB_GET_ADDRESS,
+
+	/** Tell interface number given device can use.
+	 * Parameters
+	 * - devman handle id of the device
+	 * Answer:
+	 * - ENOTSUP - operation not supported (can also mean any interface)
+	 * - EOK - operation okay, first parameter contains interface number
+	 */
+	IPC_M_USB_GET_INTERFACE,
+
+	/** Tell devman handle of device host controller.
+	 * Parameters:
+	 * - none
+	 * Answer:
+	 * - EOK - request processed without errors
+	 * - ENOTSUP - this indicates invalid USB driver
+	 * Parameters of the answer:
+	 * - devman handle of HC caller is physically connected to
+	 */
+	IPC_M_USB_GET_HOST_CONTROLLER_HANDLE
+} usb_iface_funcs_t;
+
+/** USB device communication interface. */
+typedef struct {
+	int (*get_address)(ddf_fun_t *, devman_handle_t, usb_address_t *);
+	int (*get_interface)(ddf_fun_t *, devman_handle_t, int *);
+	int (*get_hc_handle)(ddf_fun_t *, devman_handle_t *);
+} usb_iface_t;
+
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/drv/include/usbhc_iface.h
===================================================================
--- uspace/lib/drv/include/usbhc_iface.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/drv/include/usbhc_iface.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,244 @@
+/*
+ * Copyright (c) 2010 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libdrv
+ * @addtogroup usb
+ * @{
+ */
+/** @file
+ * @brief USB host controller interface definition.
+ */
+
+#ifndef LIBDRV_USBHC_IFACE_H_
+#define LIBDRV_USBHC_IFACE_H_
+
+#include "ddf/driver.h"
+#include <usb/usb.h>
+#include <bool.h>
+
+
+/** IPC methods for communication with HC through DDF interface.
+ *
+ * Notes for async methods:
+ *
+ * Methods for sending data to device (OUT transactions)
+ * - e.g. IPC_M_USBHC_INTERRUPT_OUT -
+ * always use the same semantics:
+ * - first, IPC call with given method is made
+ *   - argument #1 is target address
+ *   - argument #2 is target endpoint
+ *   - argument #3 is max packet size of the endpoint
+ * - this call is immediately followed by IPC data write (from caller)
+ * - the initial call (and the whole transaction) is answer after the
+ *   transaction is scheduled by the HC and acknowledged by the device
+ *   or immediately after error is detected
+ * - the answer carries only the error code
+ *
+ * Methods for retrieving data from device (IN transactions)
+ * - e.g. IPC_M_USBHC_INTERRUPT_IN -
+ * also use the same semantics:
+ * - first, IPC call with given method is made
+ *   - argument #1 is target address
+ *   - argument #2 is target endpoint
+ * - this call is immediately followed by IPC data read (async version)
+ * - the call is not answered until the device returns some data (or until
+ *   error occurs)
+ *
+ * Some special methods (NO-DATA transactions) do not send any data. These
+ * might behave as both OUT or IN transactions because communication parts
+ * where actual buffers are exchanged are omitted.
+ **
+ * For all these methods, wrap functions exists. Important rule: functions
+ * for IN transactions have (as parameters) buffers where retrieved data
+ * will be stored. These buffers must be already allocated and shall not be
+ * touch until the transaction is completed
+ * (e.g. not before calling usb_wait_for() with appropriate handle).
+ * OUT transactions buffers can be freed immediately after call is dispatched
+ * (i.e. after return from wrapping function).
+ *
+ */
+typedef enum {
+	/** Asks for address assignment by host controller.
+	 * Answer:
+	 * - ELIMIT - host controller run out of address
+	 * - EOK - address assigned
+	 * Answer arguments:
+	 * - assigned address
+	 *
+	 * The address must be released by via IPC_M_USBHC_RELEASE_ADDRESS.
+	 */
+	IPC_M_USBHC_REQUEST_ADDRESS,
+
+	/** Bind USB address with devman handle.
+	 * Parameters:
+	 * - USB address
+	 * - devman handle
+	 * Answer:
+	 * - EOK - address binded
+	 * - ENOENT - address is not in use
+	 */
+	IPC_M_USBHC_BIND_ADDRESS,
+
+	/** Get handle binded with given USB address.
+	 * Parameters
+	 * - USB address
+	 * Answer:
+	 * - EOK - address binded, first parameter is the devman handle
+	 * - ENOENT - address is not in use at the moment
+	 */
+	IPC_M_USBHC_GET_HANDLE_BY_ADDRESS,
+
+	/** Release address in use.
+	 * Arguments:
+	 * - address to be released
+	 * Answer:
+	 * - ENOENT - address not in use
+	 * - EPERM - trying to release default USB address
+	 */
+	IPC_M_USBHC_RELEASE_ADDRESS,
+
+
+	/** Send interrupt data to device.
+	 * See explanation at usb_iface_funcs_t (OUT transaction).
+	 */
+	IPC_M_USBHC_INTERRUPT_OUT,
+
+	/** Get interrupt data from device.
+	 * See explanation at usb_iface_funcs_t (IN transaction).
+	 */
+	IPC_M_USBHC_INTERRUPT_IN,
+
+	/** Send bulk data to device.
+	 * See explanation at usb_iface_funcs_t (OUT transaction).
+	 */
+	IPC_M_USBHC_BULK_OUT,
+
+	/** Get bulk data from device.
+	 * See explanation at usb_iface_funcs_t (IN transaction).
+	 */
+	IPC_M_USBHC_BULK_IN,
+
+	/** Issue control WRITE transfer.
+	 * See explanation at usb_iface_funcs_t (OUT transaction) for
+	 * call parameters.
+	 * This call is immediately followed by two IPC data writes
+	 * from the caller (setup packet and actual data).
+	 */
+	IPC_M_USBHC_CONTROL_WRITE,
+
+	/** Issue control READ transfer.
+	 * See explanation at usb_iface_funcs_t (IN transaction) for
+	 * call parameters.
+	 * This call is immediately followed by IPC data write from the caller
+	 * (setup packet) and IPC data read (buffer that was read).
+	 */
+	IPC_M_USBHC_CONTROL_READ,
+
+	/** Register endpoint attributes at host controller.
+	 * This is used to reserve portion of USB bandwidth.
+	 * When speed is invalid, speed of the device is used.
+	 * Parameters:
+	 * - USB address + endpoint number
+	 *   - packed as ADDR << 16 + EP
+	 * - speed + transfer type + direction
+	 *   - packed as ( SPEED << 8 + TYPE ) << 8 + DIR
+	 * - maximum packet size + interval (in milliseconds)
+	 *   - packed as MPS << 16 + INT
+	 * Answer:
+	 * - EOK - reservation successful
+	 * - ELIMIT - not enough bandwidth to satisfy the request
+	 */
+	IPC_M_USBHC_REGISTER_ENDPOINT,
+
+	/** Revert endpoint registration.
+	 * Parameters:
+	 * - USB address
+	 * - endpoint number
+	 * - data direction
+	 * Answer:
+	 * - EOK - endpoint unregistered
+	 * - ENOENT - unknown endpoint
+	 */
+	IPC_M_USBHC_UNREGISTER_ENDPOINT
+} usbhc_iface_funcs_t;
+
+/** Callback for outgoing transfer. */
+typedef void (*usbhc_iface_transfer_out_callback_t)(ddf_fun_t *,
+    int, void *);
+
+/** Callback for incoming transfer. */
+typedef void (*usbhc_iface_transfer_in_callback_t)(ddf_fun_t *,
+    int, size_t, void *);
+
+
+/** Out transfer processing function prototype. */
+typedef int (*usbhc_iface_transfer_out_t)(ddf_fun_t *, usb_target_t,
+    void *, size_t,
+    usbhc_iface_transfer_out_callback_t, void *);
+
+/** Setup transfer processing function prototype. @deprecated */
+typedef usbhc_iface_transfer_out_t usbhc_iface_transfer_setup_t;
+
+/** In transfer processing function prototype. */
+typedef int (*usbhc_iface_transfer_in_t)(ddf_fun_t *, usb_target_t,
+    void *, size_t,
+    usbhc_iface_transfer_in_callback_t, void *);
+
+/** USB host controller communication interface. */
+typedef struct {
+	int (*request_address)(ddf_fun_t *, usb_speed_t, usb_address_t *);
+	int (*bind_address)(ddf_fun_t *, usb_address_t, devman_handle_t);
+	int (*find_by_address)(ddf_fun_t *, usb_address_t, devman_handle_t *);
+	int (*release_address)(ddf_fun_t *, usb_address_t);
+
+	int (*register_endpoint)(ddf_fun_t *,
+	    usb_address_t, usb_speed_t, usb_endpoint_t,
+	    usb_transfer_type_t, usb_direction_t, size_t, unsigned int);
+	int (*unregister_endpoint)(ddf_fun_t *, usb_address_t, usb_endpoint_t,
+	    usb_direction_t);
+
+	usbhc_iface_transfer_out_t interrupt_out;
+	usbhc_iface_transfer_in_t interrupt_in;
+
+	usbhc_iface_transfer_out_t bulk_out;
+	usbhc_iface_transfer_in_t bulk_in;
+
+	int (*control_write)(ddf_fun_t *, usb_target_t,
+	    void *, size_t, void *, size_t,
+	    usbhc_iface_transfer_out_callback_t, void *);
+
+	int (*control_read)(ddf_fun_t *, usb_target_t,
+	    void *, size_t, void *, size_t,
+	    usbhc_iface_transfer_in_callback_t, void *);
+} usbhc_iface_t;
+
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/drv/include/usbhid_iface.h
===================================================================
--- uspace/lib/drv/include/usbhid_iface.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/drv/include/usbhid_iface.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,136 @@
+/*
+ * Copyright (c) 2010 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libdrv
+ * @{
+ */
+/** @file
+ * USB HID interface definition.
+ */
+
+#ifndef LIBDRV_USBHID_IFACE_H_
+#define LIBDRV_USBHID_IFACE_H_
+
+#include "ddf/driver.h"
+#include <usb/usb.h>
+
+/** IPC methods for USB HID device interface. */
+typedef enum {
+	/** Get number of events reported in single burst.
+	 * Parameters: none
+	 * Answer:
+	 * - Size of one report in bytes.
+	 */
+	IPC_M_USBHID_GET_EVENT_LENGTH,
+	/** Get single event from the HID device.
+	 * The word single refers to set of individual events that were
+	 * available at particular point in time.
+	 * Parameters:
+	 * - flags
+	 * The call is followed by data read expecting two concatenated
+	 * arrays.
+	 * Answer:
+	 * - EOK - events returned
+	 * - EAGAIN - no event ready (only in non-blocking mode)
+	 *
+	 * It is okay if the client requests less data. Extra data must
+	 * be truncated by the driver.
+	 *
+	 * @todo Change this comment.
+	 */
+	IPC_M_USBHID_GET_EVENT,
+	
+	/** Get the size of the report descriptor from the HID device.
+	 *
+	 * Parameters:
+	 * - none
+	 * Answer:
+	 * - EOK - method is implemented (expected always)
+	 * Parameters of the answer:
+	 * - Size of the report in bytes.
+	 */
+	IPC_M_USBHID_GET_REPORT_DESCRIPTOR_LENGTH,
+	
+	/** Get the report descriptor from the HID device.
+	 *
+	 * Parameters:
+	 * - none
+	 * The call is followed by data read expecting the descriptor itself.
+	 * Answer:
+	 * - EOK - report descriptor returned.
+	 */
+	IPC_M_USBHID_GET_REPORT_DESCRIPTOR
+} usbhid_iface_funcs_t;
+
+/** USB HID interface flag - return immediately if no data are available. */
+#define USBHID_IFACE_FLAG_NON_BLOCKING (1 << 0)
+
+/** USB HID device communication interface. */
+typedef struct {
+	/** Get size of the event in bytes.
+	 *
+	 * @param[in] fun DDF function answering the request.
+	 * @return Size of the event in bytes.
+	 */
+	size_t (*get_event_length)(ddf_fun_t *fun);
+
+	/** Get single event from the HID device.
+	 *
+	 * @param[in] fun DDF function answering the request.
+	 * @param[out] buffer Buffer with raw data from the device.
+	 * @param[out] act_size Actual number of returned events.
+	 * @param[in] flags Flags (see USBHID_IFACE_FLAG_*).
+	 * @return Error code.
+	 */
+	int (*get_event)(ddf_fun_t *fun, uint8_t *buffer, size_t size,
+	    size_t *act_size, int *event_nr, unsigned int flags);
+	
+	/** Get size of the report descriptor in bytes.
+	 *
+	 * @param[in] fun DDF function answering the request.
+	 * @return Size of the report descriptor in bytes.
+	 */
+	size_t (*get_report_descriptor_length)(ddf_fun_t *fun);
+	
+	/** Get the report descriptor from the HID device.
+	 *
+	 * @param[in] fun DDF function answering the request.
+	 * @param[out] desc Buffer with the report descriptor.
+	 * @param[in] size Size of the allocated @p desc buffer.
+	 * @param[out] act_size Actual size of the report descriptor returned.
+	 * @return Error code.
+	 */
+	int (*get_report_descriptor)(ddf_fun_t *fun, uint8_t *desc, 
+	    size_t size, size_t *act_size);
+} usbhid_iface_t;
+
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/ext2/Makefile
===================================================================
--- uspace/lib/ext2/Makefile	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/ext2/Makefile	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,43 @@
+#
+# Copyright (c) 2005 Martin Decky
+# Copyright (c) 2007 Jakub Jermar
+# Copyright (c) 2010 Martin Sucha
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# - Redistributions of source code must retain the above copyright
+#   notice, this list of conditions and the following disclaimer.
+# - Redistributions in binary form must reproduce the above copyright
+#   notice, this list of conditions and the following disclaimer in the
+#   documentation and/or other materials provided with the distribution.
+# - The name of the author may not be used to endorse or promote products
+#   derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+USPACE_PREFIX = ../..
+LIBRARY = libext2
+EXTRA_CFLAGS = -I$(LIBBLOCK_PREFIX)
+LIBS = $(LIBBLOCK_PREFIX)/libblock.a
+
+SOURCES = \
+	libext2_filesystem.c \
+	libext2_superblock.c \
+	libext2_block_group.c \
+	libext2_inode.c \
+	libext2_directory.c
+
+include $(USPACE_PREFIX)/Makefile.common
Index: uspace/lib/ext2/libext2.h
===================================================================
--- uspace/lib/ext2/libext2.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/ext2/libext2.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2011 Martin Sucha
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libext2
+ * @{
+ */
+/**
+ * @file
+ */
+
+#ifndef LIBEXT2_LIBEXT2_H_
+#define LIBEXT2_LIBEXT2_H_
+
+#include "libext2_superblock.h"
+#include "libext2_block_group.h"
+#include "libext2_inode.h"
+#include "libext2_filesystem.h"
+#include "libext2_directory.h"
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/ext2/libext2_block_group.c
===================================================================
--- uspace/lib/ext2/libext2_block_group.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/ext2/libext2_block_group.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2011 Martin Sucha
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libext2
+ * @{
+ */
+/**
+ * @file
+ */
+
+#include "libext2.h"
+#include "libext2_block_group.h"
+#include <byteorder.h>
+
+/**
+ * Get block ID corresponding to the block bitmap of this block group
+ * 
+ * @param bg pointer to block group descriptor
+ */
+uint32_t ext2_block_group_get_block_bitmap_block(ext2_block_group_t *bg)
+{
+	return uint32_t_le2host(bg->block_bitmap_block);
+}
+
+/**
+ * Get block ID corresponding to the inode bitmap of this block group
+ * 
+ * @param bg pointer to block group descriptor
+ */
+uint32_t ext2_block_group_get_inode_bitmap_block(ext2_block_group_t *bg)
+{
+	return uint32_t_le2host(bg->inode_bitmap_block);
+}
+
+/**
+ * Get block ID of first block in inode table
+ * 
+ * @param bg pointer to block group descriptor
+ */
+uint32_t ext2_block_group_get_inode_table_first_block(ext2_block_group_t *bg)
+{
+	return uint32_t_le2host(bg->inode_table_first_block);
+}
+
+/**
+ * Get amount of free blocks in this block group
+ * 
+ * @param bg pointer to block group descriptor
+ */
+uint16_t ext2_block_group_get_free_block_count(ext2_block_group_t *bg)
+{
+	return uint16_t_le2host(bg->free_block_count);
+}
+
+/**
+ * Set amount of free blocks in this block group
+ * 
+ * @param bg pointer to block group descriptor
+ * @param val new value
+ */
+void ext2_block_group_set_free_block_count(ext2_block_group_t *bg,
+	uint16_t val)
+{
+	bg->free_block_count = host2uint16_t_le(val);
+}
+
+/**
+ * Get amount of free inodes in this block group
+ * 
+ * @param bg pointer to block group descriptor
+ */
+uint16_t ext2_block_group_get_free_inode_count(ext2_block_group_t *bg)
+{
+	return uint16_t_le2host(bg->free_inode_count);
+}
+
+/**
+ * Get amount of inodes allocated for directories
+ * 
+ * @param bg pointer to block group descriptor
+ */
+uint16_t ext2_block_group_get_directory_inode_count(ext2_block_group_t *bg)
+{
+	return uint16_t_le2host(bg->directory_inode_count);
+}
+
+
+/** @}
+ */
Index: uspace/lib/ext2/libext2_block_group.h
===================================================================
--- uspace/lib/ext2/libext2_block_group.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/ext2/libext2_block_group.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2011 Martin Sucha
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libext2
+ * @{
+ */
+/**
+ * @file
+ */
+
+#ifndef LIBEXT2_LIBEXT2_BLOCK_GROUP_H_
+#define LIBEXT2_LIBEXT2_BLOCK_GROUP_H_
+
+#include <libblock.h>
+
+typedef struct ext2_block_group {
+	uint32_t block_bitmap_block; // Block ID for block bitmap
+	uint32_t inode_bitmap_block; // Block ID for inode bitmap
+	uint32_t inode_table_first_block; // Block ID of first block of inode table 
+	uint16_t free_block_count; // Count of free blocks
+	uint16_t free_inode_count; // Count of free inodes
+	uint16_t directory_inode_count; // Number of inodes allocated to directories
+} ext2_block_group_t;
+
+typedef struct ext2_block_group_ref {
+	block_t *block; // Reference to a block containing this block group descr
+	ext2_block_group_t *block_group;
+} ext2_block_group_ref_t;
+
+#define EXT2_BLOCK_GROUP_DESCRIPTOR_SIZE 32
+
+extern uint32_t	ext2_block_group_get_block_bitmap_block(ext2_block_group_t *);
+extern uint32_t	ext2_block_group_get_inode_bitmap_block(ext2_block_group_t *);
+extern uint32_t	ext2_block_group_get_inode_table_first_block(ext2_block_group_t *);
+extern uint16_t	ext2_block_group_get_free_block_count(ext2_block_group_t *);
+extern uint16_t	ext2_block_group_get_free_inode_count(ext2_block_group_t *);
+extern uint16_t	ext2_block_group_get_directory_inode_count(ext2_block_group_t *);
+
+extern void	ext2_block_group_set_free_block_count(ext2_block_group_t *, uint16_t);
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/ext2/libext2_directory.c
===================================================================
--- uspace/lib/ext2/libext2_directory.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/ext2/libext2_directory.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,245 @@
+/*
+ * Copyright (c) 2011 Martin Sucha
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libext2
+ * @{
+ */
+/**
+ * @file
+ */
+
+#include "libext2.h"
+#include "libext2_directory.h"
+#include <byteorder.h>
+#include <errno.h>
+#include <assert.h>
+
+static int ext2_directory_iterator_set(ext2_directory_iterator_t *it,
+    uint32_t block_size);
+
+/**
+ * Get inode number for the directory entry
+ * 
+ * @param de pointer to linked list directory entry
+ */
+uint32_t ext2_directory_entry_ll_get_inode(ext2_directory_entry_ll_t *de)
+{
+	return uint32_t_le2host(de->inode);
+}
+
+/**
+ * Get length of the directory entry
+ * 
+ * @param de pointer to linked list directory entry
+ */
+uint16_t ext2_directory_entry_ll_get_entry_length(
+    ext2_directory_entry_ll_t *de)
+{
+	return uint16_t_le2host(de->entry_length);
+}
+
+/**
+ * Get length of the name stored in the directory entry
+ * 
+ * @param de pointer to linked list directory entry
+ */
+uint16_t ext2_directory_entry_ll_get_name_length(
+    ext2_superblock_t *sb, ext2_directory_entry_ll_t *de)
+{
+	if (ext2_superblock_get_rev_major(sb) == 0 &&
+	    ext2_superblock_get_rev_minor(sb) < 5) {
+		return ((uint16_t)de->name_length_high) << 8 | 
+		    ((uint16_t)de->name_length);
+	}
+	return de->name_length;
+}
+
+/**
+ * Initialize a directory iterator
+ * 
+ * @param it pointer to iterator to initialize
+ * @param fs pointer to filesystem structure
+ * @param inode pointer to inode reference structure
+ * @return EOK on success or negative error code on failure
+ */
+int ext2_directory_iterator_init(ext2_directory_iterator_t *it,
+    ext2_filesystem_t *fs, ext2_inode_ref_t *inode_ref)
+{
+	int rc;
+	uint32_t block_id;
+	uint32_t block_size;
+	
+	it->inode_ref = inode_ref;
+	it->fs = fs;
+	
+	/* Get the first data block, so we can get the first entry */
+	rc = ext2_filesystem_get_inode_data_block_index(fs, inode_ref->inode, 0, 
+	    &block_id);
+	if (rc != EOK) {
+		return rc;
+	}
+	
+	rc = block_get(&it->current_block, fs->device, block_id, 0);
+	if (rc != EOK) {
+		return rc;
+	}
+	
+	block_size = ext2_superblock_get_block_size(fs->superblock);
+	
+	it->current_offset = 0;	
+	return ext2_directory_iterator_set(it, block_size);
+}
+
+/**
+ * Advance the directory iterator to the next entry
+ * 
+ * @param it pointer to iterator to initialize
+ * @return EOK on success or negative error code on failure
+ */
+int ext2_directory_iterator_next(ext2_directory_iterator_t *it)
+{
+	int rc;
+	uint16_t skip;
+	uint64_t size;
+	aoff64_t current_block_idx;
+	aoff64_t next_block_idx;
+	uint32_t next_block_phys_idx;
+	uint32_t block_size;
+	
+	assert(it->current != NULL);
+	
+	skip = ext2_directory_entry_ll_get_entry_length(it->current);
+	size = ext2_inode_get_size(it->fs->superblock, it->inode_ref->inode);
+	
+	/* Are we at the end? */
+	if (it->current_offset + skip >= size) {
+		rc = block_put(it->current_block);
+		it->current_block = NULL;
+		it->current = NULL;
+		if (rc != EOK) {
+			return rc;
+		}
+		
+		it->current_offset += skip;
+		return EOK;
+	}
+	
+	block_size = ext2_superblock_get_block_size(it->fs->superblock);
+	current_block_idx = it->current_offset / block_size;
+	next_block_idx = (it->current_offset + skip) / block_size;
+	
+	/* If we are moving accross block boundary,
+	 * we need to get another block
+	 */
+	if (current_block_idx != next_block_idx) {
+		rc = block_put(it->current_block);
+		it->current_block = NULL;
+		it->current = NULL;
+		if (rc != EOK) {
+			return rc;
+		}
+		
+		rc = ext2_filesystem_get_inode_data_block_index(it->fs,
+		    it->inode_ref->inode, next_block_idx, &next_block_phys_idx);
+		if (rc != EOK) {
+			return rc;
+		}
+		
+		rc = block_get(&it->current_block, it->fs->device, next_block_phys_idx,
+		    BLOCK_FLAGS_NONE);
+		if (rc != EOK) {
+			it->current_block = NULL;
+			return rc;
+		}
+	}
+	
+	it->current_offset += skip;
+	return ext2_directory_iterator_set(it, block_size);
+}
+
+static int ext2_directory_iterator_set(ext2_directory_iterator_t *it,
+    uint32_t block_size)
+{
+	uint32_t offset_in_block = it->current_offset % block_size;
+	
+	it->current = NULL;
+	
+	/* Ensure proper alignment */
+	if ((offset_in_block % 4) != 0) {
+		return EIO;
+	}
+	
+	/* Ensure that the core of the entry does not overflow the block */
+	if (offset_in_block > block_size - 8) {
+		return EIO;
+	}
+	
+	ext2_directory_entry_ll_t *entry = it->current_block->data + offset_in_block;
+	
+	/* Ensure that the whole entry does not overflow the block */
+	uint16_t length = ext2_directory_entry_ll_get_entry_length(entry);
+	if (offset_in_block + length > block_size) {
+		return EIO;
+	}
+	
+	/* Ensure the name length is not too large */
+	if (ext2_directory_entry_ll_get_name_length(it->fs->superblock, 
+	    entry) > length-8) {
+		return EIO;
+	}
+	
+	it->current = entry;
+	return EOK;
+}
+
+/**
+ * Release all resources asociated with the directory iterator
+ * 
+ * @param it pointer to iterator to initialize
+ * @return EOK on success or negative error code on failure
+ */
+int ext2_directory_iterator_fini(ext2_directory_iterator_t *it)
+{
+	int rc;
+	
+	it->fs = NULL;
+	it->inode_ref = NULL;
+	it->current = NULL;
+	
+	if (it->current_block) {
+		rc = block_put(it->current_block);
+		if (rc != EOK) {
+			return rc;
+		}
+	}
+	
+	return EOK;
+}
+
+/** @}
+ */
Index: uspace/lib/ext2/libext2_directory.h
===================================================================
--- uspace/lib/ext2/libext2_directory.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/ext2/libext2_directory.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2011 Martin Sucha
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libext2
+ * @{
+ */
+/**
+ * @file
+ */
+
+#ifndef LIBEXT2_LIBEXT2_DIRECTORY_H_
+#define LIBEXT2_LIBEXT2_DIRECTORY_H_
+
+#include <libblock.h>
+#include "libext2_filesystem.h"
+#include "libext2_inode.h"
+
+/**
+ * Linked list directory entry structure
+ */
+typedef struct ext2_directory_entry_ll {
+	uint32_t inode; // Inode for the entry
+	uint16_t entry_length; // Distance to the next directory entry
+	uint8_t name_length; // Lower 8 bits of name length
+	union {
+		uint8_t name_length_high; // Higher 8 bits of name length
+		uint8_t inode_type; // Type of referenced inode (in rev >= 0.5)
+	} __attribute__ ((packed));
+	uint8_t name; // First byte of name, if present
+} __attribute__ ((packed)) ext2_directory_entry_ll_t;
+
+typedef struct ext2_directory_iterator {
+	ext2_filesystem_t *fs;
+	ext2_inode_ref_t *inode_ref;
+	block_t *current_block;
+	aoff64_t current_offset;
+	ext2_directory_entry_ll_t *current;
+} ext2_directory_iterator_t;
+
+
+extern uint32_t	ext2_directory_entry_ll_get_inode(ext2_directory_entry_ll_t *);
+extern uint16_t	ext2_directory_entry_ll_get_entry_length(
+    ext2_directory_entry_ll_t *);
+extern uint16_t	ext2_directory_entry_ll_get_name_length(
+    ext2_superblock_t *, ext2_directory_entry_ll_t *);
+
+extern int ext2_directory_iterator_init(ext2_directory_iterator_t *,
+    ext2_filesystem_t *, ext2_inode_ref_t *);
+extern int ext2_directory_iterator_next(ext2_directory_iterator_t *);
+extern int ext2_directory_iterator_fini(ext2_directory_iterator_t *);
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/ext2/libext2_filesystem.c
===================================================================
--- uspace/lib/ext2/libext2_filesystem.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/ext2/libext2_filesystem.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,526 @@
+/*
+ * Copyright (c) 2011 Martin Sucha
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libext2
+ * @{
+ */
+/**
+ * @file
+ */
+
+#include "libext2_filesystem.h"
+#include "libext2_superblock.h"
+#include "libext2_block_group.h"
+#include "libext2_inode.h"
+#include <errno.h>
+#include <libblock.h>
+#include <malloc.h>
+#include <assert.h>
+#include <byteorder.h>
+
+/**
+ * Initialize an instance of filesystem on the device.
+ * This function reads superblock from the device and
+ * initializes libblock cache with appropriate logical block size.
+ * 
+ * @param fs			Pointer to ext2_filesystem_t to initialize
+ * @param devmap_handle	Device handle of the block device
+ * 
+ * @return 		EOK on success or negative error code on failure
+ */
+int ext2_filesystem_init(ext2_filesystem_t *fs, devmap_handle_t devmap_handle)
+{
+	int rc;
+	ext2_superblock_t *temp_superblock;
+	size_t block_size;
+	
+	fs->device = devmap_handle;
+	
+	rc = block_init(EXCHANGE_SERIALIZE, fs->device, 2048);
+	if (rc != EOK) {
+		return rc;
+	}
+	
+	rc = ext2_superblock_read_direct(fs->device, &temp_superblock);
+	if (rc != EOK) {
+		block_fini(fs->device);
+		return rc;
+	}
+	
+	block_size = ext2_superblock_get_block_size(temp_superblock);
+	
+	if (block_size > EXT2_MAX_BLOCK_SIZE) {
+		block_fini(fs->device);
+		return ENOTSUP;
+	}
+	
+	rc = block_cache_init(devmap_handle, block_size, 0, CACHE_MODE_WT);
+	if (rc != EOK) {
+		block_fini(fs->device);
+		return rc;
+	}
+	
+	fs->superblock = temp_superblock;
+	
+	return EOK; 
+}
+
+/**
+ * Check filesystem for sanity
+ * 
+ * @param fs			Pointer to ext2_filesystem_t to check
+ * @return 		EOK on success or negative error code on failure
+ */
+int ext2_filesystem_check_sanity(ext2_filesystem_t *fs)
+{
+	int rc;
+	
+	rc = ext2_superblock_check_sanity(fs->superblock);
+	if (rc != EOK) {
+		return rc;
+	}
+	
+	return EOK;
+}
+
+/**
+ * Check feature flags
+ * 
+ * @param fs Pointer to ext2_filesystem_t to check
+ * @param read_only bool to set to true if the fs needs to be read-only
+ * @return EOK on success or negative error code on failure
+ */
+int ext2_filesystem_check_flags(ext2_filesystem_t *fs, bool *o_read_only)
+{
+	/* feature flags are present in rev 1 and later */
+	if (ext2_superblock_get_rev_major(fs->superblock) == 0) {
+		*o_read_only = false;
+		return EOK;
+	}
+	
+	uint32_t incompatible;
+	uint32_t read_only;
+	
+	incompatible = ext2_superblock_get_features_incompatible(fs->superblock);
+	read_only = ext2_superblock_get_features_read_only(fs->superblock);
+	
+	/* check whether we support all features
+	 * first unset any supported feature flags
+	 * and see whether any unspported feature remains */
+	incompatible &= ~EXT2_SUPPORTED_INCOMPATIBLE_FEATURES;
+	read_only &= ~EXT2_SUPPORTED_READ_ONLY_FEATURES;
+	
+	if (incompatible > 0) {
+		*o_read_only = true;
+		return ENOTSUP;
+	}
+	
+	if (read_only > 0) {
+		*o_read_only = true;
+	}
+	
+	return EOK;
+}
+
+/**
+ * Get a reference to block descriptor
+ * 
+ * @param fs Pointer to filesystem information
+ * @param bgid Index of block group to find
+ * @param ref Pointer where to store pointer to block group reference
+ * 
+ * @return 		EOK on success or negative error code on failure
+ */
+int ext2_filesystem_get_block_group_ref(ext2_filesystem_t *fs, uint32_t bgid,
+    ext2_block_group_ref_t **ref)
+{
+	int rc;
+	aoff64_t block_id;
+	uint32_t descriptors_per_block;
+	size_t offset;
+	ext2_block_group_ref_t *newref;
+	
+	newref = malloc(sizeof(ext2_block_group_ref_t));
+	if (newref == NULL) {
+		return ENOMEM;
+	}
+	
+	descriptors_per_block = ext2_superblock_get_block_size(fs->superblock)
+	    / EXT2_BLOCK_GROUP_DESCRIPTOR_SIZE;
+	
+	/* Block group descriptor table starts at the next block after superblock */
+	block_id = ext2_superblock_get_first_block(fs->superblock) + 1;
+	
+	/* Find the block containing the descriptor we are looking for */
+	block_id += bgid / descriptors_per_block;
+	offset = (bgid % descriptors_per_block) * EXT2_BLOCK_GROUP_DESCRIPTOR_SIZE;
+	
+	rc = block_get(&newref->block, fs->device, block_id, 0);
+	if (rc != EOK) {
+		free(newref);
+		return rc;
+	}
+	
+	newref->block_group = newref->block->data + offset;
+	
+	*ref = newref;
+	
+	return EOK;
+}
+
+/**
+ * Free a reference to block group
+ * 
+ * @param ref Pointer to block group reference to free
+ * 
+ * @return 		EOK on success or negative error code on failure
+ */
+int ext2_filesystem_put_block_group_ref(ext2_block_group_ref_t *ref)
+{
+	int rc;
+	
+	rc = block_put(ref->block);
+	free(ref);
+	
+	return rc;
+}
+
+/**
+ * Get a reference to inode
+ * 
+ * @param fs Pointer to filesystem information
+ * @param index The index number of the inode
+ * @param ref Pointer where to store pointer to inode reference
+ * 
+ * @return 		EOK on success or negative error code on failure
+ */
+int ext2_filesystem_get_inode_ref(ext2_filesystem_t *fs, uint32_t index,
+    ext2_inode_ref_t **ref)
+{
+	int rc;
+	aoff64_t block_id;
+	uint32_t block_group;
+	uint32_t offset_in_group;
+	uint32_t byte_offset_in_group;
+	size_t offset_in_block;
+	uint32_t inodes_per_group;
+	uint32_t inode_table_start;
+	uint16_t inode_size;
+	uint32_t block_size;
+	ext2_block_group_ref_t *bg_ref;
+	ext2_inode_ref_t *newref;
+	
+	newref = malloc(sizeof(ext2_inode_ref_t));
+	if (newref == NULL) {
+		return ENOMEM;
+	}
+	
+	inodes_per_group = ext2_superblock_get_inodes_per_group(fs->superblock);
+	
+	/* inode numbers are 1-based, but it is simpler to work with 0-based
+	 * when computing indices
+	 */
+	index -= 1;
+	block_group = index / inodes_per_group;
+	offset_in_group = index % inodes_per_group;
+	
+	rc = ext2_filesystem_get_block_group_ref(fs, block_group, &bg_ref);
+	if (rc != EOK) {
+		free(newref);
+		return rc;
+	}
+	
+	inode_table_start = ext2_block_group_get_inode_table_first_block(
+	    bg_ref->block_group);
+	
+	inode_size = ext2_superblock_get_inode_size(fs->superblock);
+	block_size = ext2_superblock_get_block_size(fs->superblock);
+	
+	byte_offset_in_group = offset_in_group * inode_size;
+	
+	block_id = inode_table_start + (byte_offset_in_group / block_size);
+	offset_in_block = byte_offset_in_group % block_size;
+	
+	rc = block_get(&newref->block, fs->device, block_id, 0);
+	if (rc != EOK) {
+		free(newref);
+		return rc;
+	}
+	
+	newref->inode = newref->block->data + offset_in_block;
+	/* we decremented index above, but need to store the original value
+	 * in the reference
+	 */
+	newref->index = index+1;
+	
+	*ref = newref;
+	
+	return EOK;
+}
+
+/**
+ * Free a reference to inode
+ * 
+ * @param ref Pointer to inode reference to free
+ * 
+ * @return 		EOK on success or negative error code on failure
+ */
+int ext2_filesystem_put_inode_ref(ext2_inode_ref_t *ref)
+{
+	int rc;
+	
+	rc = block_put(ref->block);
+	free(ref);
+	
+	return rc;
+}
+
+/**
+ * Find a filesystem block number where iblock-th data block
+ * of the given inode is located.
+ * 
+ * @param fblock the number of filesystem block, or 0 if no such block is allocated yet
+ * 
+ * @return 		EOK on success or negative error code on failure
+ */
+int ext2_filesystem_get_inode_data_block_index(ext2_filesystem_t *fs, ext2_inode_t* inode,
+    aoff64_t iblock, uint32_t* fblock)
+{
+	int rc;
+	aoff64_t limits[4];
+	uint32_t block_ids_per_block;
+	aoff64_t blocks_per_level[4];
+	uint32_t offset_in_block;
+	uint32_t current_block;
+	aoff64_t block_offset_in_level;
+	int i;
+	int level;
+	block_t *block;
+	
+	/* Handle simple case when we are dealing with direct reference */ 
+	if (iblock < EXT2_INODE_DIRECT_BLOCKS) {
+		current_block = ext2_inode_get_direct_block(inode, (uint32_t)iblock);
+		*fblock = current_block;
+		return EOK;
+	}
+	
+	/* Compute limits for indirect block levels
+	 * TODO: compute this once when loading filesystem and store in ext2_filesystem_t
+	 */
+	block_ids_per_block = ext2_superblock_get_block_size(fs->superblock) / sizeof(uint32_t);
+	limits[0] = EXT2_INODE_DIRECT_BLOCKS;
+	blocks_per_level[0] = 1;
+	for (i = 1; i < 4; i++) {
+		blocks_per_level[i]  = blocks_per_level[i-1] *
+		    block_ids_per_block;
+		limits[i] = limits[i-1] + blocks_per_level[i];
+	}
+	
+	/* Determine the indirection level needed to get the desired block */
+	level = -1;
+	for (i = 1; i < 4; i++) {
+		if (iblock < limits[i]) {
+			level = i;
+			break;
+		}
+	}
+	
+	if (level == -1) {
+		return EIO;
+	}
+	
+	/* Compute offsets for the topmost level */
+	block_offset_in_level = iblock - limits[level-1];
+	current_block = ext2_inode_get_indirect_block(inode, level-1);
+	offset_in_block = block_offset_in_level / blocks_per_level[level-1];
+	
+	/* Navigate through other levels, until we find the block number
+	 * or find null reference meaning we are dealing with sparse file
+	 */
+	while (level > 0) {
+		rc = block_get(&block, fs->device, current_block, 0);
+		if (rc != EOK) {
+			return rc;
+		}
+		
+		assert(offset_in_block < block_ids_per_block);
+		current_block = uint32_t_le2host(((uint32_t*)block->data)[offset_in_block]);
+		
+		rc = block_put(block);
+		if (rc != EOK) {
+			return rc;
+		}
+		
+		if (current_block == 0) {
+			/* This is a sparse file */
+			*fblock = 0;
+			return EOK;
+		}
+		
+		level -= 1;
+		
+		/* If we are on the last level, break here as
+		 * there is no next level to visit
+		 */
+		if (level == 0) {
+			break;
+		}
+		
+		/* Visit the next level */
+		block_offset_in_level %= blocks_per_level[level];
+		offset_in_block = block_offset_in_level / blocks_per_level[level-1];
+	}
+	
+	*fblock = current_block;
+	
+	return EOK;
+}
+
+/**
+ * Allocate a given number of blocks and store their ids in blocks
+ * 
+ * @todo TODO: This function is not finished and really has never been
+ *             used (and tested) yet
+ * 
+ * @param fs pointer to filesystem
+ * @param blocks array of count uint32_t values where store block ids
+ * @param count number of blocks to allocate and elements in blocks array
+ * @param preferred_bg preferred block group number
+ * 
+ * @return 		EOK on success or negative error code on failure
+ */
+int ext2_filesystem_allocate_blocks(ext2_filesystem_t *fs, uint32_t *blocks,
+    size_t count, uint32_t preferred_bg)
+{
+	uint32_t bg_count = ext2_superblock_get_block_group_count(fs->superblock);
+	uint32_t bpg = ext2_superblock_get_blocks_per_group(fs->superblock);
+	uint32_t block_size = ext2_superblock_get_block_size(fs->superblock);
+	uint32_t block_group = preferred_bg;
+	uint32_t free_blocks_sb;
+	uint32_t block_groups_left;
+	size_t idx;
+	ext2_block_group_ref_t *bg;
+	int rc;
+	uint32_t bb_block;
+	block_t *block;
+	size_t bb_idx;
+	size_t bb_bit;
+	
+	free_blocks_sb = ext2_superblock_get_free_block_count(fs->superblock);
+	
+	if (count > free_blocks_sb) {
+		return EIO;
+	}
+	
+	block_groups_left = bg_count;
+	
+	idx = 0;
+	
+	/* Read the block group descriptor */
+	rc = ext2_filesystem_get_block_group_ref(fs, block_group, &bg);
+	if (rc != EOK) {
+		goto failed;
+	}
+	
+	while (idx < count && block_groups_left > 0) {
+		uint16_t fb = ext2_block_group_get_free_block_count(bg->block_group);
+		if (fb == 0) {
+			block_group = (block_group + 1) % bg_count;
+			block_groups_left -= 1;
+			
+			rc = ext2_filesystem_put_block_group_ref(bg);
+			if (rc != EOK) {
+				goto failed;
+			}
+			
+			rc = ext2_filesystem_get_block_group_ref(fs, block_group, &bg);
+			if (rc != EOK) {
+				goto failed;
+			}
+			continue;
+		}
+		
+		/* We found a block group with free block, let's look at the block bitmap */
+		bb_block = ext2_block_group_get_block_bitmap_block(bg->block_group);
+		
+		rc = block_get(&block, fs->device, bb_block, BLOCK_FLAGS_NONE);
+		if (rc != EOK) {
+			goto failed;
+		}
+		
+		/* Use all blocks from this block group */
+		for (bb_idx = 0; bb_idx < block_size && idx < count; bb_idx++) {
+			uint8_t *data = (uint8_t *) block->data;
+			if (data[bb_idx] == 0xff) {
+				continue;
+			}
+			/* find an empty bit */
+			uint8_t mask;
+			for (mask = 1, bb_bit = 0;
+				 bb_bit < 8 && idx < count; 
+				 bb_bit++, mask = mask << 1) {
+				if ((data[bb_idx] & mask) == 0) {
+					// free block found
+					blocks[idx] = block_group * bpg + bb_idx*8 + bb_bit;
+					data[bb_idx] |= mask;
+					idx += 1;
+					fb -= 1;
+					ext2_block_group_set_free_block_count(bg->block_group, fb);
+				}
+			}
+		}
+	}
+	
+	rc = ext2_filesystem_put_block_group_ref(bg);
+	if (rc != EOK) {
+		goto failed;
+	}
+	
+	// TODO update superblock
+	
+	return EOK;
+failed:
+	// TODO deallocate already allocated blocks, if possible
+	
+	return rc;
+}
+
+/**
+ * Finalize an instance of filesystem
+ * 
+ * @param fs Pointer to ext2_filesystem_t to finalize
+ */
+void ext2_filesystem_fini(ext2_filesystem_t *fs)
+{
+	free(fs->superblock);
+	block_fini(fs->device);
+}
+
+
+/** @}
+ */
Index: uspace/lib/ext2/libext2_filesystem.h
===================================================================
--- uspace/lib/ext2/libext2_filesystem.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/ext2/libext2_filesystem.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2011 Martin Sucha
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libext2
+ * @{
+ */
+/**
+ * @file
+ */
+
+#ifndef LIBEXT2_LIBEXT2_FILESYSTEM_H_
+#define LIBEXT2_LIBEXT2_FILESYSTEM_H_
+
+#include <libblock.h>
+#include "libext2_superblock.h"
+#include "libext2_block_group.h"
+#include "libext2_inode.h"
+
+typedef struct ext2_filesystem {
+	devmap_handle_t		device;
+	ext2_superblock_t *	superblock;
+} ext2_filesystem_t;
+
+// allow maximum this block size
+#define EXT2_MAX_BLOCK_SIZE			8096
+#define EXT2_REV0_FIRST_INODE		11
+#define EXT2_REV0_INODE_SIZE		128
+
+#define EXT2_FEATURE_RO_SPARSE_SUPERBLOCK	1
+#define EXT2_FEATURE_RO_LARGE_FILE			2
+#define EXT2_FEATURE_I_TYPE_IN_DIR			2
+
+#define EXT2_SUPPORTED_INCOMPATIBLE_FEATURES EXT2_FEATURE_I_TYPE_IN_DIR
+#define EXT2_SUPPORTED_READ_ONLY_FEATURES 0
+
+extern int ext2_filesystem_init(ext2_filesystem_t *, devmap_handle_t);
+extern int ext2_filesystem_check_sanity(ext2_filesystem_t *);
+extern int ext2_filesystem_check_flags(ext2_filesystem_t *, bool *);
+extern int ext2_filesystem_get_block_group_ref(ext2_filesystem_t *, uint32_t, 
+    ext2_block_group_ref_t **);
+extern int ext2_filesystem_put_block_group_ref(ext2_block_group_ref_t *);
+extern int ext2_filesystem_get_inode_ref(ext2_filesystem_t *, uint32_t,
+    ext2_inode_ref_t **);
+extern int ext2_filesystem_put_inode_ref(ext2_inode_ref_t *);
+extern int ext2_filesystem_get_inode_data_block_index(ext2_filesystem_t *, ext2_inode_t*,
+    aoff64_t, uint32_t*);
+extern int ext2_filesystem_allocate_blocks(ext2_filesystem_t *, uint32_t *, size_t, uint32_t);
+extern void ext2_filesystem_fini(ext2_filesystem_t *);
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/ext2/libext2_inode.c
===================================================================
--- uspace/lib/ext2/libext2_inode.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/ext2/libext2_inode.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,192 @@
+/*
+ * Copyright (c) 2011 Martin Sucha
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libext2
+ * @{
+ */
+/**
+ * @file
+ */
+
+#include "libext2.h"
+#include "libext2_inode.h"
+#include "libext2_superblock.h"
+#include <byteorder.h>
+#include <assert.h>
+
+/**
+ * Get mode stored in the inode
+ * 
+ * @param inode pointer to inode
+ */
+uint32_t ext2_inode_get_mode(ext2_superblock_t *sb, ext2_inode_t *inode)
+{
+	if (ext2_superblock_get_os(sb) == EXT2_SUPERBLOCK_OS_HURD) {
+		return ((uint32_t)uint16_t_le2host(inode->mode_high)) << 16 |
+		    ((uint32_t)uint16_t_le2host(inode->mode));
+	}
+	return uint16_t_le2host(inode->mode);
+}
+
+/**
+ * Check whether inode is of given type
+ * 
+ * @param sb pointer to superblock structure
+ * @param inode pointer to inode
+ * @param type EXT2_INODE_MODE_TYPE_* constant to check
+ */
+bool ext2_inode_is_type(ext2_superblock_t *sb, ext2_inode_t *inode, uint32_t type)
+{
+	uint32_t mode = ext2_inode_get_mode(sb, inode);
+	return (mode & EXT2_INODE_MODE_TYPE_MASK) == type;
+}
+
+/**
+ * Get uid this inode is belonging to
+ * 
+ * @param inode pointer to inode
+ */
+uint32_t ext2_inode_get_user_id(ext2_superblock_t *sb, ext2_inode_t *inode)
+{
+	uint32_t os = ext2_superblock_get_os(sb);
+	if (os == EXT2_SUPERBLOCK_OS_LINUX || os == EXT2_SUPERBLOCK_OS_HURD) {
+		return ((uint32_t)uint16_t_le2host(inode->user_id_high)) << 16 |
+		    ((uint32_t)uint16_t_le2host(inode->user_id));
+	}
+	return uint16_t_le2host(inode->user_id);
+}
+
+/**
+ * Get size of file
+ * 
+ * For regular files in revision 1 and later, the high 32 bits of
+ * file size are stored in inode->size_high and are 0 otherwise
+ * 
+ * @param inode pointer to inode
+ */
+uint64_t ext2_inode_get_size(ext2_superblock_t *sb, ext2_inode_t *inode)
+{
+	uint32_t major_rev = ext2_superblock_get_rev_major(sb);
+	
+	if (major_rev > 0 && ext2_inode_is_type(sb, inode, EXT2_INODE_MODE_FILE)) {
+		return ((uint64_t)uint32_t_le2host(inode->size_high)) << 32 |
+		    ((uint64_t)uint32_t_le2host(inode->size));
+	}
+	return uint32_t_le2host(inode->size);
+}
+
+/**
+ * Get gid this inode belongs to
+ * 
+ * For Linux and Hurd, the high 16 bits are stored in OS dependent part
+ * of inode structure
+ * 
+ * @param inode pointer to inode
+ */
+uint32_t ext2_inode_get_group_id(ext2_superblock_t *sb, ext2_inode_t *inode)
+{
+	uint32_t os = ext2_superblock_get_os(sb);
+	if (os == EXT2_SUPERBLOCK_OS_LINUX || os == EXT2_SUPERBLOCK_OS_HURD) {
+		return ((uint32_t)uint16_t_le2host(inode->group_id_high)) << 16 |
+		    ((uint32_t)uint16_t_le2host(inode->group_id));
+	}
+	return uint16_t_le2host(inode->group_id);
+}
+
+/**
+ * Get usage count (i.e. hard link count)
+ * A value of 1 is common, while 0 means that the inode should be freed
+ * 
+ * @param inode pointer to inode
+ */
+uint16_t ext2_inode_get_usage_count(ext2_inode_t *inode)
+{
+	return uint16_t_le2host(inode->usage_count);
+}
+
+/**
+ * Get number of 512-byte data blocks allocated for contents of the file
+ * represented by this inode.
+ * This should be multiple of block size unless fragments are used.
+ * 
+ * @param inode pointer to inode
+ */
+uint32_t ext2_inode_get_reserved_512_blocks(ext2_inode_t *inode)
+{
+	return uint32_t_le2host(inode->reserved_512_blocks);
+}
+
+/**
+ * Get number of blocks allocated for contents of the file
+ * represented by this inode.
+ * 
+ * @param inode pointer to inode
+ */
+uint32_t ext2_inode_get_reserved_blocks(ext2_superblock_t *sb,
+    ext2_inode_t *inode)
+{
+	return ext2_inode_get_reserved_512_blocks(inode) /
+	    (ext2_superblock_get_block_size(sb) / 512);
+}
+
+/**
+ * Get inode flags
+ * 
+ * @param inode pointer to inode
+ */
+uint32_t ext2_inode_get_flags(ext2_inode_t *inode) {
+	return uint32_t_le2host(inode->flags);
+}
+
+/**
+ * Get direct block ID
+ * 
+ * @param inode pointer to inode
+ * @param idx Index to block. Valid values are 0 <= idx < 12
+ */
+uint32_t ext2_inode_get_direct_block(ext2_inode_t *inode, uint8_t idx)
+{
+	assert(idx < EXT2_INODE_DIRECT_BLOCKS);
+	return uint32_t_le2host(inode->direct_blocks[idx]);
+}
+
+/**
+ * Get indirect block ID
+ * 
+ * @param inode pointer to inode
+ * @param idx Indirection level. Valid values are 0 <= idx < 3, where 0 is
+ *            singly-indirect block and 2 is triply-indirect-block
+ */
+uint32_t ext2_inode_get_indirect_block(ext2_inode_t *inode, uint8_t idx)
+{
+	assert(idx < 3);
+	return uint32_t_le2host(inode->indirect_blocks[idx]);
+}
+
+/** @}
+ */
Index: uspace/lib/ext2/libext2_inode.h
===================================================================
--- uspace/lib/ext2/libext2_inode.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/ext2/libext2_inode.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2011 Martin Sucha
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libext2
+ * @{
+ */
+/**
+ * @file
+ */
+
+#ifndef LIBEXT2_LIBEXT2_INODE_H_
+#define LIBEXT2_LIBEXT2_INODE_H_
+
+#include <libblock.h>
+#include "libext2_superblock.h"
+
+typedef struct ext2_inode {
+	uint16_t mode;
+	uint16_t user_id;
+	uint32_t size;
+	uint8_t unused[16];
+	uint16_t group_id;
+	uint16_t usage_count; // Hard link count, when 0 the inode is to be freed
+	uint32_t reserved_512_blocks; // Size of this inode in 512-byte blocks
+	uint32_t flags;
+	uint8_t unused2[4];
+	uint32_t direct_blocks[12]; // Direct block ids stored in this inode
+	uint32_t indirect_blocks[3];
+	uint32_t version;
+	uint32_t file_acl;
+	union {
+		uint32_t dir_acl;
+		uint32_t size_high; // For regular files in version >= 1
+	} __attribute__ ((packed));
+	uint8_t unused3[6];
+	uint16_t mode_high; // Hurd only
+	uint16_t user_id_high; // Linux/Hurd only
+	uint16_t group_id_high; // Linux/Hurd only
+} __attribute__ ((packed)) ext2_inode_t;
+
+#define EXT2_INODE_MODE_FIFO		0x1000
+#define EXT2_INODE_MODE_CHARDEV		0x2000
+#define EXT2_INODE_MODE_DIRECTORY	0x4000
+#define EXT2_INODE_MODE_BLOCKDEV	0x6000
+#define EXT2_INODE_MODE_FILE		0x8000
+#define EXT2_INODE_MODE_SOFTLINK	0xA000
+#define EXT2_INODE_MODE_SOCKET		0xC000
+#define EXT2_INODE_MODE_ACCESS_MASK	0x0FFF
+#define EXT2_INODE_MODE_TYPE_MASK	0xF000
+#define EXT2_INODE_DIRECT_BLOCKS	12
+
+#define EXT2_INODE_ROOT_INDEX		2
+
+typedef struct ext2_inode_ref {
+	block_t *block; // Reference to a block containing this inode
+	ext2_inode_t *inode;
+	uint32_t index; // Index number of this inode
+} ext2_inode_ref_t;
+
+extern uint32_t ext2_inode_get_mode(ext2_superblock_t *, ext2_inode_t *);
+extern bool ext2_inode_is_type(ext2_superblock_t *, ext2_inode_t *, uint32_t);
+extern uint32_t ext2_inode_get_user_id(ext2_superblock_t *, ext2_inode_t *);
+extern uint64_t ext2_inode_get_size(ext2_superblock_t *, ext2_inode_t *);
+extern uint32_t ext2_inode_get_group_id(ext2_superblock_t *, ext2_inode_t *);
+extern uint16_t ext2_inode_get_usage_count(ext2_inode_t *);
+extern uint32_t ext2_inode_get_reserved_512_blocks(ext2_inode_t *);
+extern uint32_t ext2_inode_get_reserved_blocks(ext2_superblock_t *, 
+    ext2_inode_t *);
+extern uint32_t ext2_inode_get_flags(ext2_inode_t *);
+extern uint32_t ext2_inode_get_direct_block(ext2_inode_t *, uint8_t);
+extern uint32_t ext2_inode_get_indirect_block(ext2_inode_t *, uint8_t level);
+
+
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/ext2/libext2_superblock.c
===================================================================
--- uspace/lib/ext2/libext2_superblock.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/ext2/libext2_superblock.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,409 @@
+/*
+ * Copyright (c) 2011 Martin Sucha
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libext2
+ * @{
+ */
+/**
+ * @file
+ */
+
+#include "libext2.h"
+#include <errno.h>
+#include <malloc.h>
+#include <libblock.h>
+#include <byteorder.h>
+
+/**
+ * Return a magic number from ext2 superblock, this should be equal to
+ * EXT_SUPERBLOCK_MAGIC for valid ext2 superblock
+ * 
+ * @param sb pointer to superblock
+ */
+uint16_t ext2_superblock_get_magic(ext2_superblock_t *sb)
+{
+	return uint16_t_le2host(sb->magic);
+}
+
+/**
+ * Get the position of first ext2 data block (i.e. the block number
+ * containing main superblock)
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_first_block(ext2_superblock_t *sb)
+{
+	return uint32_t_le2host(sb->first_block);
+}
+
+/**
+ * Get the number of bits to shift a value of 1024 to the left necessary
+ * to get the size of a block
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_block_size_log2(ext2_superblock_t *sb)
+{
+	return uint32_t_le2host(sb->block_size_log2);
+}
+
+/**
+ * Get the size of a block, in bytes 
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_block_size(ext2_superblock_t *sb)
+{
+	return 1024 << ext2_superblock_get_block_size_log2(sb);
+}
+
+/**
+ * Get the number of bits to shift a value of 1024 to the left necessary
+ * to get the size of a fragment (note that this is a signed integer and
+ * if negative, the value should be shifted to the right instead)
+ * 
+ * @param sb pointer to superblock
+ */
+int32_t ext2_superblock_get_fragment_size_log2(ext2_superblock_t *sb)
+{
+	return uint32_t_le2host(sb->fragment_size_log2);
+}
+
+/**
+ * Get the size of a fragment, in bytes 
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_fragment_size(ext2_superblock_t *sb)
+{
+	int32_t log = ext2_superblock_get_fragment_size_log2(sb);
+	if (log >= 0) {
+		return 1024 << log;
+	}
+	else {
+		return 1024 >> -log;
+	}
+}
+
+/**
+ * Get number of blocks per block group
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_blocks_per_group(ext2_superblock_t *sb)
+{
+	return uint32_t_le2host(sb->blocks_per_group);
+}
+
+/**
+ * Get number of fragments per block group
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_fragments_per_group(ext2_superblock_t *sb)
+{
+	return uint32_t_le2host(sb->fragments_per_group);
+}
+
+/**
+ * Get filesystem state
+ * 
+ * @param sb pointer to superblock
+ */
+uint16_t ext2_superblock_get_state(ext2_superblock_t *sb)
+{
+	return uint16_t_le2host(sb->state);
+}
+
+/**
+ * Get minor revision number
+ * 
+ * @param sb pointer to superblock
+ */
+uint16_t ext2_superblock_get_rev_minor(ext2_superblock_t *sb)
+{
+	return uint16_t_le2host(sb->rev_minor);
+}
+
+/**
+ * Get major revision number
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_rev_major(ext2_superblock_t *sb)
+{
+	return uint32_t_le2host(sb->rev_major);
+}
+
+/**
+ * Get index of first regular inode
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_first_inode(ext2_superblock_t *sb)
+{
+	if (ext2_superblock_get_rev_major(sb) == 0) {
+		return EXT2_REV0_FIRST_INODE;
+	}
+	return uint32_t_le2host(sb->first_inode);
+}
+
+/**
+ * Get size of inode
+ * 
+ * @param sb pointer to superblock
+ */
+uint16_t ext2_superblock_get_inode_size(ext2_superblock_t *sb)
+{
+	if (ext2_superblock_get_rev_major(sb) == 0) {
+		return EXT2_REV0_INODE_SIZE;
+	}
+	return uint16_t_le2host(sb->inode_size);
+}
+
+/**
+ * Get total inode count
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_total_inode_count(ext2_superblock_t *sb)
+{
+	return uint32_t_le2host(sb->total_inode_count);
+}
+
+/**
+ * Get total block count
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_total_block_count(ext2_superblock_t *sb)
+{
+	return uint32_t_le2host(sb->total_block_count);
+}
+
+/**
+ * Get amount of blocks reserved for the superuser
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_reserved_block_count(ext2_superblock_t *sb)
+{
+	return uint32_t_le2host(sb->reserved_block_count);
+}
+
+/**
+ * Get amount of free blocks
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_free_block_count(ext2_superblock_t *sb)
+{
+	return uint32_t_le2host(sb->free_block_count);
+}
+
+/**
+ * Get amount of free inodes
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_free_inode_count(ext2_superblock_t *sb)
+{
+	return uint32_t_le2host(sb->free_inode_count);
+}
+
+/**
+ * Get id of operating system that created the filesystem
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_os(ext2_superblock_t *sb)
+{
+	return uint32_t_le2host(sb->os);
+}
+
+/**
+ * Get count of inodes per block group
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_inodes_per_group(ext2_superblock_t *sb)
+{
+	return uint32_t_le2host(sb->inodes_per_group);
+}
+
+/**
+ * Get compatible features flags
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_features_compatible(ext2_superblock_t *sb)
+{
+	return uint32_t_le2host(sb->features_compatible);
+}
+
+/**
+ * Get incompatible features flags
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_features_incompatible(ext2_superblock_t *sb)
+{
+	return uint32_t_le2host(sb->features_incompatible);
+}
+
+/**
+ * Get read-only compatible features flags
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_features_read_only(ext2_superblock_t *sb)
+{
+	return uint32_t_le2host(sb->features_read_only);
+}
+
+/**
+ * Compute count of block groups present in the filesystem
+ * 
+ * Note: This function works only for correct filesystem,
+ *       i.e. it assumes that total block count > 0 and
+ *       blocks per group > 0
+ * 
+ * Example:
+ *   If there are 3 blocks per group, the result should be as follows:
+ *   Total blocks	Result
+ *   1				1
+ *   2				1
+ *   3				1
+ *   4				2
+ * 
+ * 
+ * @param sb pointer to superblock
+ */
+uint32_t ext2_superblock_get_block_group_count(ext2_superblock_t *sb)
+{
+	/* We add one to the result because e.g. 2/3 = 0, while to store
+	 *  2 blocks in 3-block group we need one (1) block group
+	 * 
+	 * We subtract one first because of special case that to store e.g.
+	 *  3 blocks in a 3-block group we need only one group
+	 *  (and 3/3 yields one - this is one more that we want as we
+	 *   already add one at the end)
+	 */ 
+	return ((ext2_superblock_get_total_block_count(sb)-1) / 
+	    ext2_superblock_get_blocks_per_group(sb))+1;
+}
+
+/** Read a superblock directly from device (i.e. no libblock cache)
+ * 
+ * @param devmap_handle	Device handle of the block device.
+ * @param superblock	Pointer where to store pointer to new superblock
+ * 
+ * @return		EOK on success or negative error code on failure.
+ */
+int ext2_superblock_read_direct(devmap_handle_t devmap_handle,
+    ext2_superblock_t **superblock)
+{
+	void *data;
+	int rc;
+	
+	data = malloc(EXT2_SUPERBLOCK_SIZE);
+	if (data == NULL) {
+		return ENOMEM;
+	}
+	
+	rc = block_read_bytes_direct(devmap_handle, EXT2_SUPERBLOCK_OFFSET,
+	    EXT2_SUPERBLOCK_SIZE, data);
+	if (rc != EOK) {
+		free(data);
+		return rc;
+	}
+	
+	(*superblock) = data;
+	return EOK;
+}
+
+/** Check a superblock for sanity
+ * 
+ * @param sb	Pointer to superblock
+ * 
+ * @return		EOK on success or negative error code on failure.
+ */
+int ext2_superblock_check_sanity(ext2_superblock_t *sb)
+{
+	if (ext2_superblock_get_magic(sb) != EXT2_SUPERBLOCK_MAGIC) {
+		return ENOTSUP;
+	}
+	
+	if (ext2_superblock_get_rev_major(sb) > 1) {
+		return ENOTSUP;
+	}
+	
+	if (ext2_superblock_get_total_inode_count(sb) == 0) {
+		return ENOTSUP;
+	}
+	
+	if (ext2_superblock_get_total_block_count(sb) == 0) {
+		return ENOTSUP;
+	}
+	
+	if (ext2_superblock_get_blocks_per_group(sb) == 0) {
+		return ENOTSUP;
+	}
+	
+	if (ext2_superblock_get_fragments_per_group(sb) == 0) {
+		return ENOTSUP;
+	}
+	
+	/* We don't support fragments smaller than block */
+	if (ext2_superblock_get_block_size(sb) != 
+		    ext2_superblock_get_fragment_size(sb)) {
+		return ENOTSUP;
+	}
+	if (ext2_superblock_get_blocks_per_group(sb) !=
+		    ext2_superblock_get_fragments_per_group(sb)) {
+		return ENOTSUP;
+	}
+	
+	if (ext2_superblock_get_inodes_per_group(sb) == 0) {
+		return ENOTSUP;
+	}
+	
+	if (ext2_superblock_get_inode_size(sb) < 128) {
+		return ENOTSUP;
+	}
+	
+	if (ext2_superblock_get_first_inode(sb) < 11) {
+		return ENOTSUP;
+	}
+	
+	return EOK;
+}
+
+
+/** @}
+ */
Index: uspace/lib/ext2/libext2_superblock.h
===================================================================
--- uspace/lib/ext2/libext2_superblock.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/ext2/libext2_superblock.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2011 Martin Sucha
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libext2
+ * @{
+ */
+/**
+ * @file
+ */
+
+#ifndef LIBEXT2_LIBEXT2_SUPERBLOCK_H_
+#define LIBEXT2_LIBEXT2_SUPERBLOCK_H_
+
+#include <libblock.h>
+
+typedef struct ext2_superblock {
+	uint32_t	total_inode_count; // Total number of inodes
+	uint32_t	total_block_count; // Total number of blocks
+	uint32_t	reserved_block_count; // Total number of reserved blocks
+	uint32_t	free_block_count; // Total number of free blocks
+	uint32_t	free_inode_count; // Total number of free inodes
+	uint32_t	first_block; // Block containing the superblock (either 0 or 1)
+	uint32_t	block_size_log2; // log_2(block_size)
+	int32_t		fragment_size_log2; // log_2(fragment size)
+	uint32_t	blocks_per_group; // Number of blocks in one block group
+	uint32_t	fragments_per_group; // Number of fragments per block group
+	uint32_t	inodes_per_group; // Number of inodes per block group
+	uint8_t		unused2[12];
+	uint16_t	magic; // Magic value
+	uint16_t	state; // State (mounted/unmounted)
+	uint16_t	error_behavior; // What to do when errors are encountered
+	uint16_t	rev_minor; // Minor revision level
+	uint8_t		unused3[8];
+	uint32_t	os; // OS that created the filesystem
+	uint32_t	rev_major; // Major revision level
+	uint8_t		unused4[4];
+	
+	// Following is for ext2 revision 1 only
+	uint32_t	first_inode;
+	uint16_t	inode_size;
+	uint16_t	unused5;
+	uint32_t	features_compatible;
+	uint32_t	features_incompatible;
+	uint32_t	features_read_only;
+	uint8_t		uuid[16]; // UUID TODO: Create a library for UUIDs
+	uint8_t		volume_name[16];
+
+// TODO: add __attribute__((aligned(...)) for better performance?
+//       (it is necessary to ensure the superblock is correctly aligned then
+//        though)
+} __attribute__ ((packed)) ext2_superblock_t;
+
+#define EXT2_SUPERBLOCK_MAGIC		0xEF53
+#define EXT2_SUPERBLOCK_SIZE		1024
+#define EXT2_SUPERBLOCK_OFFSET		1024
+#define EXT2_SUPERBLOCK_LAST_BYTE	(EXT2_SUPERBLOCK_OFFSET + \
+									 EXT2_SUPERBLOCK_SIZE -1)
+#define EXT2_SUPERBLOCK_OS_LINUX	0
+#define EXT2_SUPERBLOCK_OS_HURD		1
+
+
+extern uint16_t	ext2_superblock_get_magic(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_first_block(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_block_size_log2(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_block_size(ext2_superblock_t *);
+extern int32_t	ext2_superblock_get_fragment_size_log2(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_fragment_size(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_blocks_per_group(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_fragments_per_group(ext2_superblock_t *);
+extern uint16_t	ext2_superblock_get_state(ext2_superblock_t *);
+extern uint16_t	ext2_superblock_get_rev_minor(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_rev_major(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_os(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_first_inode(ext2_superblock_t *);
+extern uint16_t	ext2_superblock_get_inode_size(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_total_inode_count(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_total_block_count(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_reserved_block_count(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_free_block_count(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_free_inode_count(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_block_group_count(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_inodes_per_group(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_features_compatible(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_features_incompatible(ext2_superblock_t *);
+extern uint32_t	ext2_superblock_get_features_read_only(ext2_superblock_t *);
+
+extern int ext2_superblock_read_direct(devmap_handle_t, ext2_superblock_t **);
+extern int ext2_superblock_check_sanity(ext2_superblock_t *);
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/fs/libfs.c
===================================================================
--- uspace/lib/fs/libfs.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/fs/libfs.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -67,16 +67,16 @@
  * code.
  *
- * @param vfs_phone Open phone for communication with VFS.
- * @param reg       File system registration structure. It will be
- *                  initialized by this function.
- * @param info      VFS info structure supplied by the file system
- *                  implementation.
- * @param conn      Connection fibril for handling all calls originating in
- *                  VFS.
+ * @param sess Session for communication with VFS.
+ * @param reg  File system registration structure. It will be
+ *             initialized by this function.
+ * @param info VFS info structure supplied by the file system
+ *             implementation.
+ * @param conn Connection fibril for handling all calls originating in
+ *             VFS.
  *
  * @return EOK on success or a non-zero error code on errror.
  *
  */
-int fs_register(int vfs_phone, fs_reg_t *reg, vfs_info_t *info,
+int fs_register(async_sess_t *sess, fs_reg_t *reg, vfs_info_t *info,
     async_client_conn_t conn)
 {
@@ -86,12 +86,17 @@
 	 * out-of-order, when it knows that the operation succeeded or failed.
 	 */
+	
+	async_exch_t *exch = async_exchange_begin(sess);
+	
 	ipc_call_t answer;
-	aid_t req = async_send_0(vfs_phone, VFS_IN_REGISTER, &answer);
+	aid_t req = async_send_0(exch, VFS_IN_REGISTER, &answer);
 	
 	/*
 	 * Send our VFS info structure to VFS.
 	 */
-	int rc = async_data_write_start(vfs_phone, info, sizeof(*info)); 
+	int rc = async_data_write_start(exch, info, sizeof(*info));
+	
 	if (rc != EOK) {
+		async_exchange_end(exch);
 		async_wait_for(req, NULL);
 		return rc;
@@ -101,5 +106,5 @@
 	 * Ask VFS for callback connection.
 	 */
-	async_connect_to_me(vfs_phone, 0, 0, 0, conn);
+	async_connect_to_me(exch, 0, 0, 0, conn);
 	
 	/*
@@ -108,4 +113,5 @@
 	reg->plb_ro = as_get_mappable_page(PLB_SIZE);
 	if (!reg->plb_ro) {
+		async_exchange_end(exch);
 		async_wait_for(req, NULL);
 		return ENOMEM;
@@ -115,5 +121,8 @@
 	 * Request sharing the Path Lookup Buffer with VFS.
 	 */
-	rc = async_share_in_start_0_0(vfs_phone, reg->plb_ro, PLB_SIZE);
+	rc = async_share_in_start_0_0(exch, reg->plb_ro, PLB_SIZE);
+	
+	async_exchange_end(exch);
+	
 	if (rc) {
 		async_wait_for(req, NULL);
@@ -148,27 +157,15 @@
 	fs_handle_t mr_fs_handle = (fs_handle_t) IPC_GET_ARG3(*request);
 	devmap_handle_t mr_devmap_handle = (devmap_handle_t) IPC_GET_ARG4(*request);
-	int res;
-	sysarg_t rc;
-	
-	ipc_call_t call;
-	ipc_callid_t callid;
-	
-	/* Accept the phone */
-	callid = async_get_call(&call);
-	int mountee_phone = (int) IPC_GET_ARG1(call);
-	if ((IPC_GET_IMETHOD(call) != IPC_M_CONNECTION_CLONE) ||
-	    (mountee_phone < 0)) {
-		async_answer_0(callid, EINVAL);
+	
+	async_sess_t *mountee_sess = async_clone_receive(EXCHANGE_PARALLEL);
+	if (mountee_sess == NULL) {
 		async_answer_0(rid, EINVAL);
 		return;
 	}
 	
-	/* Acknowledge the mountee_phone */
-	async_answer_0(callid, EOK);
-	
 	fs_node_t *fn;
-	res = ops->node_get(&fn, mp_devmap_handle, mp_fs_index);
+	int res = ops->node_get(&fn, mp_devmap_handle, mp_fs_index);
 	if ((res != EOK) || (!fn)) {
-		async_hangup(mountee_phone);
+		async_hangup(mountee_sess);
 		async_data_write_void(combine_rc(res, ENOENT));
 		async_answer_0(rid, combine_rc(res, ENOENT));
@@ -177,5 +174,5 @@
 	
 	if (fn->mp_data.mp_active) {
-		async_hangup(mountee_phone);
+		async_hangup(mountee_sess);
 		(void) ops->node_put(fn);
 		async_data_write_void(EBUSY);
@@ -184,16 +181,20 @@
 	}
 	
-	rc = async_req_0_0(mountee_phone, IPC_M_CONNECT_ME);
-	if (rc != EOK) {
-		async_hangup(mountee_phone);
+	async_exch_t *exch = async_exchange_begin(mountee_sess);
+	async_sess_t *sess = async_connect_me(EXCHANGE_PARALLEL, exch);
+	
+	if (!sess) {
+		async_exchange_end(exch);
+		async_hangup(mountee_sess);
 		(void) ops->node_put(fn);
-		async_data_write_void(rc);
-		async_answer_0(rid, rc);
+		async_data_write_void(errno);
+		async_answer_0(rid, errno);
 		return;
 	}
 	
 	ipc_call_t answer;
-	rc = async_data_write_forward_1_1(mountee_phone, VFS_OUT_MOUNTED,
+	int rc = async_data_write_forward_1_1(exch, VFS_OUT_MOUNTED,
 	    mr_devmap_handle, &answer);
+	async_exchange_end(exch);
 	
 	if (rc == EOK) {
@@ -201,5 +202,5 @@
 		fn->mp_data.fs_handle = mr_fs_handle;
 		fn->mp_data.devmap_handle = mr_devmap_handle;
-		fn->mp_data.phone = mountee_phone;
+		fn->mp_data.sess = mountee_sess;
 	}
 	
@@ -236,6 +237,7 @@
 	 * Tell the mounted file system to unmount.
 	 */
-	res = async_req_1_0(fn->mp_data.phone, VFS_OUT_UNMOUNTED,
-	    fn->mp_data.devmap_handle);
+	async_exch_t *exch = async_exchange_begin(fn->mp_data.sess);
+	res = async_req_1_0(exch, VFS_OUT_UNMOUNTED, fn->mp_data.devmap_handle);
+	async_exchange_end(exch);
 
 	/*
@@ -243,9 +245,10 @@
 	 */
 	if (res == EOK) {
-		async_hangup(fn->mp_data.phone);
+		async_hangup(fn->mp_data.sess);
 		fn->mp_data.mp_active = false;
 		fn->mp_data.fs_handle = 0;
 		fn->mp_data.devmap_handle = 0;
-		fn->mp_data.phone = 0;
+		fn->mp_data.sess = NULL;
+		
 		/* Drop the reference created in libfs_mount(). */
 		(void) ops->node_put(fn);
@@ -293,7 +296,9 @@
 	
 	if (cur->mp_data.mp_active) {
-		async_forward_slow(rid, cur->mp_data.phone, VFS_OUT_LOOKUP,
-		    next, last, cur->mp_data.devmap_handle, lflag, index,
-		    IPC_FF_ROUTE_FROM_ME);
+		async_exch_t *exch = async_exchange_begin(cur->mp_data.sess);
+		async_forward_slow(rid, exch, VFS_OUT_LOOKUP, next, last,
+		    cur->mp_data.devmap_handle, lflag, index, IPC_FF_ROUTE_FROM_ME);
+		async_exchange_end(exch);
+		
 		(void) ops->node_put(cur);
 		return;
@@ -351,7 +356,10 @@
 				next--;
 			
-			async_forward_slow(rid, tmp->mp_data.phone,
-			    VFS_OUT_LOOKUP, next, last, tmp->mp_data.devmap_handle,
-			    lflag, index, IPC_FF_ROUTE_FROM_ME);
+			async_exch_t *exch = async_exchange_begin(tmp->mp_data.sess);
+			async_forward_slow(rid, exch, VFS_OUT_LOOKUP, next, last,
+			    tmp->mp_data.devmap_handle, lflag, index,
+			    IPC_FF_ROUTE_FROM_ME);
+			async_exchange_end(exch);
+			
 			(void) ops->node_put(cur);
 			(void) ops->node_put(tmp);
Index: uspace/lib/fs/libfs.h
===================================================================
--- uspace/lib/fs/libfs.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/fs/libfs.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -44,5 +44,5 @@
 typedef struct {
 	bool mp_active;
-	int phone;
+	async_sess_t *sess;
 	fs_handle_t fs_handle;
 	devmap_handle_t devmap_handle;
@@ -88,5 +88,6 @@
 } fs_reg_t;
 
-extern int fs_register(int, fs_reg_t *, vfs_info_t *, async_client_conn_t);
+extern int fs_register(async_sess_t *, fs_reg_t *, vfs_info_t *,
+    async_client_conn_t);
 
 extern void fs_node_initialize(fs_node_t *);
Index: uspace/lib/net/generic/generic.c
===================================================================
--- uspace/lib/net/generic/generic.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/net/generic/generic.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -37,4 +37,5 @@
 #include <generic.h>
 #include <async.h>
+#include <async_obsolete.h>
 #include <ipc/services.h>
 #include <net/device.h>
@@ -56,5 +57,5 @@
     int state, services_t target)
 {
-	async_msg_3(phone, (sysarg_t) message, (sysarg_t) device_id,
+	async_obsolete_msg_3(phone, (sysarg_t) message, (sysarg_t) device_id,
 	    (sysarg_t) state, target);
 	
@@ -78,5 +79,5 @@
     int arg2, services_t service)
 {
-	return (int) async_req_3_0(phone, (sysarg_t) message,
+	return (int) async_obsolete_req_3_0(phone, (sysarg_t) message,
 	    (sysarg_t) device_id, (sysarg_t) arg2, (sysarg_t) service);
 }
@@ -107,5 +108,5 @@
 
 	/* Request the address */
-	message_id = async_send_1(phone, (sysarg_t) message,
+	message_id = async_obsolete_send_1(phone, (sysarg_t) message,
 	    (sysarg_t) device_id, NULL);
 	string = measured_strings_return(phone, address, data, 1);
@@ -145,5 +146,5 @@
 	sysarg_t suffix;
 	
-	sysarg_t result = async_req_1_4(phone, (sysarg_t) message,
+	sysarg_t result = async_obsolete_req_1_4(phone, (sysarg_t) message,
 	    (sysarg_t) device_id, &addr_len, &prefix, &content, &suffix);
 	
@@ -172,8 +173,8 @@
 {
 	if (error) {
-		async_msg_4(phone, (sysarg_t) message, (sysarg_t) device_id,
+		async_obsolete_msg_4(phone, (sysarg_t) message, (sysarg_t) device_id,
 		    (sysarg_t) packet_id, (sysarg_t) target, (sysarg_t) error);
 	} else {
-		async_msg_3(phone, (sysarg_t) message, (sysarg_t) device_id,
+		async_obsolete_msg_3(phone, (sysarg_t) message, (sysarg_t) device_id,
 		    (sysarg_t) packet_id, (sysarg_t) target);
 	}
@@ -198,8 +199,8 @@
 {
 	if (error) {
-		async_msg_4(phone, (sysarg_t) message, (sysarg_t) device_id,
+		async_obsolete_msg_4(phone, (sysarg_t) message, (sysarg_t) device_id,
 		    (sysarg_t) packet_id, (sysarg_t) sender, (sysarg_t) error);
 	} else {
-		async_msg_3(phone, (sysarg_t) message, (sysarg_t) device_id,
+		async_obsolete_msg_3(phone, (sysarg_t) message, (sysarg_t) device_id,
 		    (sysarg_t) packet_id, (sysarg_t) sender);
 	}
@@ -243,5 +244,5 @@
 
 	/* Request the translation */
-	message_id = async_send_3(phone, (sysarg_t) message,
+	message_id = async_obsolete_send_3(phone, (sysarg_t) message,
 	    (sysarg_t) device_id, (sysarg_t) count, (sysarg_t) service, NULL);
 	measured_strings_send(phone, configuration, count);
Index: uspace/lib/net/generic/packet_remote.c
===================================================================
--- uspace/lib/net/generic/packet_remote.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/net/generic/packet_remote.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -37,4 +37,5 @@
 
 #include <async.h>
+#include <async_obsolete.h>
 #include <errno.h>
 #include <ipc/packet.h>
@@ -59,5 +60,5 @@
  * @return EOK on success.
  * @return Other error codes as defined for the pm_add() function.
- * @return Other error codes as defined for the async_share_in_start() function.
+ * @return Other error codes as defined for the async_obsolete_share_in_start() function.
  *
  */
@@ -69,8 +70,8 @@
 	int rc;
 	
-	message = async_send_1(phone, NET_PACKET_GET, packet_id, &answer);
+	message = async_obsolete_send_1(phone, NET_PACKET_GET, packet_id, &answer);
 
 	*packet = (packet_t *) as_get_mappable_page(size);
-	rc = async_share_in_start_0_0(phone, *packet, size);
+	rc = async_obsolete_share_in_start_0_0(phone, *packet, size);
 	if (rc != EOK) {
 		munmap(*packet, size);
@@ -117,5 +118,5 @@
 		sysarg_t size;
 		
-		rc = async_req_1_1(phone, NET_PACKET_GET_SIZE, packet_id,
+		rc = async_obsolete_req_1_1(phone, NET_PACKET_GET_SIZE, packet_id,
 		    &size);
 		if (rc != EOK)
@@ -154,5 +155,5 @@
 	int rc;
 	
-	rc = async_req_4_2(phone, NET_PACKET_CREATE_4, max_content, addr_len,
+	rc = async_obsolete_req_4_2(phone, NET_PACKET_CREATE_4, max_content, addr_len,
 	    max_prefix, max_suffix, &packet_id, &size);
 	if (rc != EOK)
@@ -185,5 +186,5 @@
 	int rc;
 	
-	rc = async_req_1_2(phone, NET_PACKET_CREATE_1, content, &packet_id,
+	rc = async_obsolete_req_1_2(phone, NET_PACKET_CREATE_1, content, &packet_id,
 	    &size);
 	if (rc != EOK)
@@ -212,5 +213,5 @@
 void pq_release_remote(int phone, packet_id_t packet_id)
 {
-	async_msg_1(phone, NET_PACKET_RELEASE, packet_id);
+	async_obsolete_msg_1(phone, NET_PACKET_RELEASE, packet_id);
 }
 
Index: uspace/lib/net/il/arp_remote.c
===================================================================
--- uspace/lib/net/il/arp_remote.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/net/il/arp_remote.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -40,4 +40,5 @@
 
 #include <async.h>
+#include <async_obsolete.h>
 #include <errno.h>
 #include <ipc/services.h>
@@ -68,5 +69,5 @@
 int arp_clean_cache_req(int arp_phone)
 {
-	return (int) async_req_0_0(arp_phone, NET_ARP_CLEAN_CACHE);
+	return (int) async_obsolete_req_0_0(arp_phone, NET_ARP_CLEAN_CACHE);
 }
 
@@ -87,5 +88,5 @@
 	sysarg_t result;
 
-	message_id = async_send_2(arp_phone, NET_ARP_CLEAR_ADDRESS,
+	message_id = async_obsolete_send_2(arp_phone, NET_ARP_CLEAR_ADDRESS,
 	    (sysarg_t) device_id, protocol, NULL);
 	measured_strings_send(arp_phone, address, 1);
@@ -104,5 +105,5 @@
 int arp_clear_device_req(int arp_phone, device_id_t device_id)
 {
-	return (int) async_req_1_0(arp_phone, NET_ARP_CLEAR_DEVICE,
+	return (int) async_obsolete_req_1_0(arp_phone, NET_ARP_CLEAR_DEVICE,
 	    (sysarg_t) device_id);
 }
@@ -137,5 +138,5 @@
 	sysarg_t result;
 
-	message_id = async_send_3(arp_phone, NET_ARP_DEVICE,
+	message_id = async_obsolete_send_3(arp_phone, NET_ARP_DEVICE,
 	    (sysarg_t) device_id, protocol, netif, NULL);
 	measured_strings_send(arp_phone, address, 1);
Index: uspace/lib/net/il/il_skel.c
===================================================================
--- uspace/lib/net/il/il_skel.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/net/il/il_skel.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -42,4 +42,7 @@
 #include <net/modules.h>
 
+// FIXME: remove this header
+#include <kernel/ipc/ipc_methods.h>
+
 /** Default thread for new connections.
  *
@@ -75,6 +78,5 @@
 		 * result.
 		 */
-		if ((IPC_GET_IMETHOD(call) == IPC_M_PHONE_HUNGUP) ||
-		    (res == EHANGUP))
+		if ((!IPC_GET_IMETHOD(call)) || (res == EHANGUP))
 			return;
 		
Index: uspace/lib/net/il/ip_client.c
===================================================================
--- uspace/lib/net/il/ip_client.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/net/il/ip_client.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -181,6 +181,6 @@
 	/* Set the header */
 	header = (ip_header_t *) data;
-	header->header_length = IP_COMPUTE_HEADER_LENGTH(sizeof(ip_header_t) +
-	    ipopt_length);
+	SET_IP_HEADER_LENGTH(header,
+	    (IP_COMPUTE_HEADER_LENGTH(sizeof(ip_header_t) + ipopt_length)));
 	header->ttl = (ttl ? ttl : IPDEFTTL);
 	header->tos = tos;
@@ -188,5 +188,5 @@
 
 	if (dont_fragment)
-		header->flags = IPFLAG_DONT_FRAGMENT;
+		SET_IP_HEADER_FLAGS(header, IPFLAG_DONT_FRAGMENT);
 
 	return EOK;
@@ -227,5 +227,5 @@
 		*tos = header->tos;
 	if (dont_fragment)
-		*dont_fragment = header->flags & IPFLAG_DONT_FRAGMENT;
+		*dont_fragment = GET_IP_HEADER_FLAGS(header) & IPFLAG_DONT_FRAGMENT;
 	if (ipopt_length) {
 		*ipopt_length = IP_HEADER_LENGTH(header) - sizeof(ip_header_t);
Index: uspace/lib/net/il/ip_remote.c
===================================================================
--- uspace/lib/net/il/ip_remote.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/net/il/ip_remote.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -44,5 +44,5 @@
 #include <packet_client.h>
 #include <generic.h>
-
+#include <async_obsolete.h>
 #include <ipc/services.h>
 #include <ipc/il.h>
@@ -66,5 +66,5 @@
     in_addr_t address, in_addr_t netmask, in_addr_t gateway)
 {
-	return (int) async_req_4_0(ip_phone, NET_IP_ADD_ROUTE,
+	return (int) async_obsolete_req_4_0(ip_phone, NET_IP_ADD_ROUTE,
 	    (sysarg_t) device_id, (sysarg_t) gateway.s_addr,
 	    (sysarg_t) address.s_addr, (sysarg_t) netmask.s_addr);
@@ -150,13 +150,13 @@
 	
 	ipc_call_t answer;
-	aid_t message_id = async_send_1(ip_phone, NET_IP_GET_ROUTE,
+	aid_t message_id = async_obsolete_send_1(ip_phone, NET_IP_GET_ROUTE,
 	    (sysarg_t) protocol, &answer);
 	
-	if ((async_data_write_start(ip_phone, destination, addrlen) == EOK) &&
-	    (async_data_read_start(ip_phone, headerlen,
+	if ((async_obsolete_data_write_start(ip_phone, destination, addrlen) == EOK) &&
+	    (async_obsolete_data_read_start(ip_phone, headerlen,
 	    sizeof(*headerlen)) == EOK) && (*headerlen > 0)) {
 		*header = malloc(*headerlen);
 		if (*header) {
-			if (async_data_read_start(ip_phone, *header,
+			if (async_obsolete_data_read_start(ip_phone, *header,
 			    *headerlen) != EOK)
 				free(*header);
@@ -243,5 +243,5 @@
     in_addr_t gateway)
 {
-	return (int) async_req_2_0(ip_phone, NET_IP_SET_GATEWAY,
+	return (int) async_obsolete_req_2_0(ip_phone, NET_IP_SET_GATEWAY,
 	    (sysarg_t) device_id, (sysarg_t) gateway.s_addr);
 }
Index: uspace/lib/net/include/ip_header.h
===================================================================
--- uspace/lib/net/include/ip_header.h	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/net/include/ip_header.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -64,5 +64,5 @@
  */
 #define IP_FRAGMENT_OFFSET(header) \
-	((((header)->fragment_offset_high << 8) + \
+	(((GET_IP_HEADER_FRAGMENT_OFFSET_HIGH(header) << 8) + \
 	    (header)->fragment_offset_low) * 8U)
 
@@ -83,5 +83,5 @@
  */
 #define IP_HEADER_LENGTH(header) \
-	((header)->header_length * 4U)
+	(GET_IP_HEADER_LENGTH(header) * 4U)
 
 /** Returns the actual IP packet total length.
@@ -143,11 +143,17 @@
  */
 struct ip_header {
-#ifdef ARCH_IS_BIG_ENDIAN
-	uint8_t version : 4;
-	uint8_t header_length : 4;
-#else
-	uint8_t header_length : 4;
-	uint8_t version : 4;
-#endif
+	uint8_t vhl; /* version, header_length */
+
+#define GET_IP_HEADER_VERSION(header) \
+	(((header)->vhl & 0xf0) >> 4)
+#define SET_IP_HEADER_VERSION(header, version) \
+	((header)->vhl = \
+	 ((version & 0x0f) << 4) | ((header)->vhl & 0x0f))
+
+#define GET_IP_HEADER_LENGTH(header) \
+	((header)->vhl & 0x0f)
+#define SET_IP_HEADER_LENGTH(header, length) \
+	((header)->vhl = \
+	 (length & 0x0f) | ((header)->vhl & 0xf0))
 
 	uint8_t tos;
@@ -155,11 +161,17 @@
 	uint16_t identification;
 
-#ifdef ARCH_IS_BIG_ENDIAN
-	uint8_t flags : 3;
-	uint8_t fragment_offset_high : 5;
-#else
-	uint8_t fragment_offset_high : 5;
-	uint8_t flags : 3;
-#endif
+	uint8_t ffoh; /* flags, fragment_offset_high */
+
+#define GET_IP_HEADER_FLAGS(header) \
+	(((header)->ffoh & 0xe0) >> 5)
+#define SET_IP_HEADER_FLAGS(header, flags) \
+	((header)->ffoh = \
+	 ((flags & 0x07) << 5) | ((header)->ffoh & 0x1f))
+
+#define GET_IP_HEADER_FRAGMENT_OFFSET_HIGH(header) \
+	((header)->ffoh & 0x1f)
+#define SET_IP_HEADER_FRAGMENT_OFFSET_HIGH(header, fragment_offset_high) \
+	((header)->ffoh = \
+	 (fragment_offset_high & 0x1f) | ((header)->ffoh & 0xe0))
 
 	uint8_t fragment_offset_low;
@@ -181,11 +193,18 @@
 	uint8_t pointer;
 
-#ifdef ARCH_IS_BIG_ENDIAN
-	uint8_t overflow : 4;
-	uint8_t flags : 4;
-#else
-	uint8_t flags : 4;
-	uint8_t overflow : 4;
-#endif
+	uint8_t of; /* overflow, flags */
+
+#define GET_IP_OPTION_OVERFLOW(option) \
+	(((option)->of & 0xf0) >> 4)
+#define SET_IP_OPTION_OVERFLOW(option, overflow) \
+	((option)->of = \
+	 ((overflow & 0x0f) << 4) | ((option)->of & 0x0f))
+
+#define GET_IP_OPTION_FLAGS(option) \
+	((option)->of & 0x0f)
+#define SET_IP_OPTION_FLAGS(option, flags) \
+	((option)->of = \
+	 (flags & 0x0f) | ((option)->of & 0xf0))
+
 } __attribute__ ((packed));
 
Index: uspace/lib/net/netif/netif_remote.c
===================================================================
--- uspace/lib/net/netif/netif_remote.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/net/netif/netif_remote.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -38,5 +38,5 @@
 #include <packet_client.h>
 #include <generic.h>
-
+#include <async_obsolete.h>
 #include <ipc/services.h>
 #include <ipc/netif.h>
@@ -82,5 +82,5 @@
 int netif_probe_req(int netif_phone, device_id_t device_id, int irq, void *io)
 {
-	return async_req_3_0(netif_phone, NET_NETIF_PROBE, device_id, irq,
+	return async_obsolete_req_3_0(netif_phone, NET_NETIF_PROBE, device_id, irq,
 	    (sysarg_t) io);
 }
@@ -119,5 +119,5 @@
 int netif_start_req(int netif_phone, device_id_t device_id)
 {
-	return async_req_1_0(netif_phone, NET_NETIF_START, device_id);
+	return async_obsolete_req_1_0(netif_phone, NET_NETIF_START, device_id);
 }
 
@@ -136,5 +136,5 @@
 int netif_stop_req(int netif_phone, device_id_t device_id)
 {
-	return async_req_1_0(netif_phone, NET_NETIF_STOP, device_id);
+	return async_obsolete_req_1_0(netif_phone, NET_NETIF_STOP, device_id);
 }
 
@@ -154,7 +154,7 @@
 		return EBADMEM;
 	
-	aid_t message_id = async_send_1(netif_phone, NET_NETIF_STATS,
+	aid_t message_id = async_obsolete_send_1(netif_phone, NET_NETIF_STATS,
 	    (sysarg_t) device_id, NULL);
-	async_data_read_start(netif_phone, stats, sizeof(*stats));
+	async_obsolete_data_read_start(netif_phone, stats, sizeof(*stats));
 	
 	sysarg_t result;
Index: uspace/lib/net/netif/netif_skel.c
===================================================================
--- uspace/lib/net/netif/netif_skel.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/net/netif/netif_skel.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -54,4 +54,7 @@
 #include <nil_remote.h>
 
+// FIXME: remove this header
+#include <kernel/ipc/ipc_methods.h>
+
 DEVICE_MAP_IMPLEMENT(netif_device_map, netif_device_t);
 
@@ -288,8 +291,8 @@
 	*count = 0;
 	
+	if (!IPC_GET_IMETHOD(*call))
+		return EOK;
+	
 	switch (IPC_GET_IMETHOD(*call)) {
-	case IPC_M_PHONE_HUNGUP:
-		return EOK;
-	
 	case NET_NETIF_PROBE:
 		return netif_probe_req_local(0, IPC_GET_DEVICE(*call),
@@ -385,6 +388,5 @@
 		
 		/* End if said to either by the message or the processing result */
-		if ((IPC_GET_IMETHOD(call) == IPC_M_PHONE_HUNGUP) ||
-		    (res == EHANGUP))
+		if ((!IPC_GET_IMETHOD(call)) || (res == EHANGUP))
 			return;
 		
Index: uspace/lib/net/nil/nil_skel.c
===================================================================
--- uspace/lib/net/nil/nil_skel.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/net/nil/nil_skel.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -42,4 +42,7 @@
 #include <net/modules.h>
 
+// FIXME: remove this header
+#include <kernel/ipc/ipc_methods.h>
+
 /** Default thread for new connections.
  *
@@ -75,6 +78,5 @@
 		 * result.
 		 */
-		if ((IPC_GET_IMETHOD(call) == IPC_M_PHONE_HUNGUP) ||
-		    (res == EHANGUP))
+		if ((!IPC_GET_IMETHOD(call)) || (res == EHANGUP))
 			return;
 		
Index: uspace/lib/net/tl/icmp_remote.c
===================================================================
--- uspace/lib/net/tl/icmp_remote.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/net/tl/icmp_remote.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -41,4 +41,5 @@
 
 #include <async.h>
+#include <async_obsolete.h>
 #include <errno.h>
 #include <ipc/services.h>
@@ -64,5 +65,5 @@
     icmp_param_t mtu, packet_t *packet)
 {
-	async_msg_3(icmp_phone, NET_ICMP_DEST_UNREACH, (sysarg_t) code,
+	async_obsolete_msg_3(icmp_phone, NET_ICMP_DEST_UNREACH, (sysarg_t) code,
 	    (sysarg_t) packet_get_id(packet), (sysarg_t) mtu);
 	return EOK;
@@ -83,5 +84,5 @@
 int icmp_source_quench_msg(int icmp_phone, packet_t *packet)
 {
-	async_msg_2(icmp_phone, NET_ICMP_SOURCE_QUENCH, 0,
+	async_obsolete_msg_2(icmp_phone, NET_ICMP_SOURCE_QUENCH, 0,
 	    (sysarg_t) packet_get_id(packet));
 	return EOK;
@@ -103,5 +104,5 @@
 int icmp_time_exceeded_msg(int icmp_phone, icmp_code_t code, packet_t *packet)
 {
-	async_msg_2(icmp_phone, NET_ICMP_TIME_EXCEEDED, (sysarg_t) code,
+	async_obsolete_msg_2(icmp_phone, NET_ICMP_TIME_EXCEEDED, (sysarg_t) code,
 	    (sysarg_t) packet_get_id(packet));
 	return EOK;
@@ -125,5 +126,5 @@
     icmp_param_t pointer, packet_t *packet)
 {
-	async_msg_3(icmp_phone, NET_ICMP_PARAMETERPROB, (sysarg_t) code,
+	async_obsolete_msg_3(icmp_phone, NET_ICMP_PARAMETERPROB, (sysarg_t) code,
 	    (sysarg_t) packet_get_id(packet), (sysarg_t) pointer);
 	return EOK;
Index: uspace/lib/net/tl/tl_skel.c
===================================================================
--- uspace/lib/net/tl/tl_skel.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/net/tl/tl_skel.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -42,4 +42,7 @@
 #include <net/modules.h>
 
+// FIXME: remove this header
+#include <kernel/ipc/ipc_methods.h>
+
 /** Default thread for new connections.
  *
@@ -77,6 +80,5 @@
 		 * result.
 		 */
-		if ((IPC_GET_IMETHOD(call) == IPC_M_PHONE_HUNGUP) ||
-		    (res == EHANGUP))
+		if ((!IPC_GET_IMETHOD(call)) || (res == EHANGUP))
 			return;
 		
Index: uspace/lib/packet/generic/packet_server.c
===================================================================
--- uspace/lib/packet/generic/packet_server.c	(revision 9536e6ec91688bf386cf5f5e8f86fd2fb06546e2)
+++ uspace/lib/packet/generic/packet_server.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -324,8 +324,9 @@
 
 	*answer_count = 0;
+	
+	if (!IPC_GET_IMETHOD(*call))
+		return EOK;
+	
 	switch (IPC_GET_IMETHOD(*call)) {
-	case IPC_M_PHONE_HUNGUP:
-		return EOK;
-	
 	case NET_PACKET_CREATE_1:
 		packet = packet_get_local(DEFAULT_ADDR_LEN, DEFAULT_PREFIX,
Index: uspace/lib/usb/Makefile
===================================================================
--- uspace/lib/usb/Makefile	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usb/Makefile	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,44 @@
+#
+# Copyright (c) 2010 Vojtech Horky
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# - Redistributions of source code must retain the above copyright
+#   notice, this list of conditions and the following disclaimer.
+# - Redistributions in binary form must reproduce the above copyright
+#   notice, this list of conditions and the following disclaimer in the
+#   documentation and/or other materials provided with the distribution.
+# - The name of the author may not be used to endorse or promote products
+#   derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+USPACE_PREFIX = ../..
+LIBRARY = libusb
+EXTRA_CFLAGS += \
+	-I$(LIBDRV_PREFIX)/include \
+	-Iinclude
+
+SOURCES = \
+	src/class.c \
+	src/ddfiface.c \
+	src/debug.c \
+	src/dump.c \
+	src/hc.c \
+	src/resolve.c \
+	src/usb.c
+
+include $(USPACE_PREFIX)/Makefile.common
Index: uspace/lib/usb/include/usb/classes/classes.h
===================================================================
--- uspace/lib/usb/include/usb/classes/classes.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usb/include/usb/classes/classes.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2010 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * USB device classes (generic constants and functions).
+ */
+#ifndef LIBUSB_CLASSES_H_
+#define LIBUSB_CLASSES_H_
+
+/** USB device class. */
+typedef enum {
+	USB_CLASS_USE_INTERFACE = 0x00,
+	USB_CLASS_AUDIO = 0x01,
+	USB_CLASS_COMMUNICATIONS_CDC_CONTROL = 0x02,
+	USB_CLASS_HID = 0x03,
+	USB_CLASS_PHYSICAL = 0x05,
+	USB_CLASS_IMAGE = 0x06,
+	USB_CLASS_PRINTER = 0x07,
+	USB_CLASS_MASS_STORAGE = 0x08,
+	USB_CLASS_HUB = 0x09,
+	USB_CLASS_CDC_DATA = 0x0A,
+	USB_CLASS_SMART_CARD = 0x0B,
+	USB_CLASS_CONTENT_SECURITY = 0x0D,
+	USB_CLASS_VIDEO = 0x0E,
+	USB_CLASS_PERSONAL_HEALTHCARE = 0x0F,
+	USB_CLASS_DIAGNOSTIC = 0xDC,
+	USB_CLASS_WIRELESS_CONTROLLER = 0xE0,
+	USB_CLASS_MISCELLANEOUS = 0xEF,
+	USB_CLASS_APPLICATION_SPECIFIC = 0xFE,
+	USB_CLASS_VENDOR_SPECIFIC = 0xFF,
+	/* USB_CLASS_ = 0x, */
+} usb_class_t;
+
+const char *usb_str_class(usb_class_t);
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usb/include/usb/classes/hub.h
===================================================================
--- uspace/lib/usb/include/usb/classes/hub.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usb/include/usb/classes/hub.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,225 @@
+/*
+ * Copyright (c) 2010 Matus Dekanek
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * @brief USB hub related structures.
+ */
+#ifndef LIBUSB_CLASS_HUB_H_
+#define LIBUSB_CLASS_HUB_H_
+
+#include <sys/types.h>
+
+/** Hub class feature selector.
+ * @warning The constants are not unique (feature selectors are used
+ * for hub and port).
+ */
+typedef enum {
+	USB_HUB_FEATURE_HUB_LOCAL_POWER = 0,
+	USB_HUB_FEATURE_HUB_OVER_CURRENT = 1,
+	USB_HUB_FEATURE_C_HUB_LOCAL_POWER = 0,
+	USB_HUB_FEATURE_C_HUB_OVER_CURRENT = 1,
+	USB_HUB_FEATURE_PORT_CONNECTION = 0,
+	USB_HUB_FEATURE_PORT_ENABLE = 1,
+	USB_HUB_FEATURE_PORT_SUSPEND = 2,
+	USB_HUB_FEATURE_PORT_OVER_CURRENT = 3,
+	USB_HUB_FEATURE_PORT_RESET = 4,
+	USB_HUB_FEATURE_PORT_POWER = 8,
+	USB_HUB_FEATURE_PORT_LOW_SPEED = 9,
+	USB_HUB_FEATURE_C_PORT_CONNECTION = 16,
+	USB_HUB_FEATURE_C_PORT_ENABLE = 17,
+	USB_HUB_FEATURE_C_PORT_SUSPEND = 18,
+	USB_HUB_FEATURE_C_PORT_OVER_CURRENT = 19,
+	USB_HUB_FEATURE_C_PORT_RESET = 20,
+	/* USB_HUB_FEATURE_ = , */
+} usb_hub_class_feature_t;
+
+
+/** Header of standard hub descriptor without the "variadic" part. */
+typedef struct {
+	/** Descriptor length. */
+	uint8_t length;
+	/** Descriptor type (0x29). */
+	uint8_t descriptor_type;
+	/** Number of downstream ports. */
+	uint8_t port_count;
+	/** Characteristics bitmask. */
+	uint16_t characteristics;
+	/** Time from power-on to stabilization of current on the port. */
+	uint8_t power_good_time;
+	/** Maximum current requirements in mA. */
+	uint8_t max_current;
+} __attribute__ ((packed)) usb_hub_descriptor_header_t;
+
+/**
+ *	@brief usb hub descriptor
+ *
+ *	For more information see Universal Serial Bus Specification Revision 1.1 chapter 11.16.2
+ */
+typedef struct usb_hub_descriptor_type {
+    /** Number of bytes in this descriptor, including this byte */
+    //uint8_t bDescLength;
+
+    /** Descriptor Type, value: 29H for hub descriptor */
+    //uint8_t bDescriptorType;
+
+    /** Number of downstream ports that this hub supports */
+    uint8_t ports_count;
+
+    /**
+            D1...D0: Logical Power Switching Mode
+            00: Ganged power switching (all ports power at
+            once)
+            01: Individual port power switching
+            1X: Reserved. Used only on 1.0 compliant hubs
+            that implement no power switching.
+            D2: Identifies a Compound Device
+            0: Hub is not part of a compound device
+            1: Hub is part of a compound device
+            D4...D3: Over-current Protection Mode
+            00: Global Over-current Protection. The hub
+            reports over-current as a summation of all
+            ports current draw, without a breakdown of
+            individual port over-current status.
+            01: Individual Port Over-current Protection. The
+            hub reports over-current on a per-port basis.
+            Each port has an over-current indicator.
+            1X: No Over-current Protection. This option is
+            allowed only for bus-powered hubs that do not
+            implement over-current protection.
+            D15...D5:
+            Reserved
+     */
+    uint16_t hub_characteristics;
+
+    /**
+            Time (in 2ms intervals) from the time the power-on
+            sequence begins on a port until power is good on that
+            port. The USB System Software uses this value to
+            determine how long to wait before accessing a
+            powered-on port.
+     */
+    uint8_t pwr_on_2_good_time;
+
+    /**
+            Maximum current requirements of the Hub Controller
+            electronics in mA.
+     */
+    uint8_t current_requirement;
+
+    /**
+            Indicates if a port has a removable device attached.
+            This field is reported on byte-granularity. Within a
+            byte, if no port exists for a given location, the field
+            representing the port characteristics returns 0.
+            Bit value definition:
+            0B - Device is removable
+            1B - Device is non-removable
+            This is a bitmap corresponding to the individual ports
+            on the hub:
+            Bit 0: Reserved for future use
+            Bit 1: Port 1
+            Bit 2: Port 2
+            ....
+            Bit n: Port n (implementation-dependent, up to a
+            maximum of 255 ports).
+     */
+    uint8_t devices_removable[32];
+
+    /**
+            This field exists for reasons of compatibility with
+            software written for 1.0 compliant devices. All bits in
+            this field should be set to 1B. This field has one bit for
+            each port on the hub with additional pad bits, if
+            necessary, to make the number of bits in the field an
+            integer multiple of 8.
+     */
+    //uint8_t * port_pwr_ctrl_mask;
+} usb_hub_descriptor_t;
+
+
+
+/**	@brief usb hub specific request types.
+ *
+ *	For more information see Universal Serial Bus Specification Revision 1.1 chapter 11.16.2
+ */
+typedef enum {
+    /**	This request resets a value reported in the hub status.	*/
+    USB_HUB_REQ_TYPE_CLEAR_HUB_FEATURE = 0x20,
+    /** This request resets a value reported in the port status. */
+    USB_HUB_REQ_TYPE_CLEAR_PORT_FEATURE = 0x23,
+    /** This is an optional per-port diagnostic request that returns the bus state value, as sampled at the last EOF2 point. */
+    USB_HUB_REQ_TYPE_GET_STATE = 0xA3,
+    /** This request returns the hub descriptor. */
+    USB_HUB_REQ_TYPE_GET_DESCRIPTOR = 0xA0,
+    /** This request returns the current hub status and the states that have changed since the previous acknowledgment. */
+    USB_HUB_REQ_TYPE_GET_HUB_STATUS = 0xA0,
+    /** This request returns the current port status and the current value of the port status change bits. */
+    USB_HUB_REQ_TYPE_GET_PORT_STATUS = 0xA3,
+    /** This request overwrites the hub descriptor. */
+    USB_HUB_REQ_TYPE_SET_DESCRIPTOR = 0x20,
+    /** This request sets a value reported in the hub status. */
+    USB_HUB_REQ_TYPE_SET_HUB_FEATURE = 0x20,
+    /** This request sets a value reported in the port status. */
+    USB_HUB_REQ_TYPE_SET_PORT_FEATURE = 0x23
+} usb_hub_bm_request_type_t;
+
+/** @brief hub class request codes*/
+/// \TODO these are duplicit to standart descriptors
+typedef enum {
+    /**  */
+    USB_HUB_REQUEST_GET_STATUS = 0,
+    /** */
+    USB_HUB_REQUEST_CLEAR_FEATURE = 1,
+    /** */
+    USB_HUB_REQUEST_GET_STATE = 2,
+    /** */
+    USB_HUB_REQUEST_SET_FEATURE = 3,
+    /** */
+    USB_HUB_REQUEST_GET_DESCRIPTOR = 6,
+    /** */
+    USB_HUB_REQUEST_SET_DESCRIPTOR = 7
+} usb_hub_request_t;
+
+/**
+ *	Maximum size of usb hub descriptor in bytes
+ */
+extern size_t USB_HUB_MAX_DESCRIPTOR_SIZE;
+
+
+
+
+
+
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usb/include/usb/classes/massstor.h
===================================================================
--- uspace/lib/usb/include/usb/classes/massstor.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usb/include/usb/classes/massstor.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * USB mass storage related functions and constants.
+ */
+#ifndef LIBUSB_CLASS_MASSSTOR_H_
+#define LIBUSB_CLASS_MASSSTOR_H_
+
+#include <sys/types.h>
+
+/** USB mass storage subclasses. */
+typedef enum {
+	USB_MASSSTOR_SUBCLASS_RBC = 0x01,
+	/** Also known as MMC-5. */
+	USB_MASSSTOR_SUBCLASS_ATAPI = 0x02,
+	USB_MASSSTOR_SUBCLASS_UFI = 0x04,
+	USB_MASSSTOR_SUBCLASS_SCSI = 0x06,
+	USB_MASSSTOR_SUBCLASS_LSDFS = 0x07,
+	USB_MASSSTOR_SUBCLASS_IEEE1667 = 0x08,
+	USB_MASSSTOR_SUBCLASS_VENDOR = 0xFF
+} usb_massstor_subclass_t;
+
+/** USB mass storage interface protocols. */
+typedef enum {
+	/** CBI transport with command completion interrupt. */
+	USB_MASSSTOR_PROTOCOL_CBI_CC = 0x00,
+	/** CBI transport with no command completion interrupt. */
+	USB_MASSSTOR_PROTOCOL_CBI = 0x01,
+	/** Bulk only transport. */
+	USB_MASSSTOR_PROTOCOL_BBB = 0x50,
+	/** USB attached SCSI. */
+	USB_MASSSTOR_PROTOCOL_UAS = 0x62,
+	USB_MASSSTOR_PROTOCOL_VENDOR = 0xFF
+} usb_massstor_protocol_t;
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usb/include/usb/ddfiface.h
===================================================================
--- uspace/lib/usb/include/usb/ddfiface.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usb/include/usb/ddfiface.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * Implementations of DDF interfaces functions.
+ */
+#ifndef LIBUSB_DDFIFACE_H_
+#define LIBUSB_DDFIFACE_H_
+
+#include <sys/types.h>
+#include <usb_iface.h>
+
+int usb_iface_get_hc_handle_hub_impl(ddf_fun_t *, devman_handle_t *);
+int usb_iface_get_address_hub_impl(ddf_fun_t *, devman_handle_t,
+    usb_address_t *);
+extern usb_iface_t usb_iface_hub_impl;
+
+int usb_iface_get_hc_handle_hub_child_impl(ddf_fun_t *, devman_handle_t *);
+int usb_iface_get_address_hub_child_impl(ddf_fun_t *, devman_handle_t,
+    usb_address_t *);
+extern usb_iface_t usb_iface_hub_child_impl;
+
+int usb_iface_get_hc_handle_hc_impl(ddf_fun_t *, devman_handle_t *);
+
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usb/include/usb/debug.h
===================================================================
--- uspace/lib/usb/include/usb/debug.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usb/include/usb/debug.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 2010-2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * Debugging related functions.
+ */
+#ifndef LIBUSB_DEBUG_H_
+#define LIBUSB_DEBUG_H_
+#include <stdio.h>
+#include <inttypes.h>
+#include <usb/usb.h>
+#include <assert.h>
+
+void usb_dump_standard_descriptor(FILE *, const char *, const char *,
+    const uint8_t *, size_t);
+
+/** Logging level. */
+typedef enum {
+	/** Fatal, unrecoverable, error.
+	 * Such error prevents the driver from working at all.
+	 */
+	USB_LOG_LEVEL_FATAL,
+
+	/** Serious but recoverable error
+	 * Shall be used for errors fatal for single device but not for
+	 * driver itself.
+	 */
+	USB_LOG_LEVEL_ERROR,
+
+	/** Warning.
+	 * Problems from which the driver is able to recover gracefully.
+	 */
+	USB_LOG_LEVEL_WARNING,
+
+	/** Information message.
+	 * This should be the last level that is printed by default to
+	 * the screen.
+	 * Typical usage is to inform that new device was found and what
+	 * are its capabilities.
+	 * Do not use for repetitive actions (such as device polling).
+	 */
+	USB_LOG_LEVEL_INFO,
+
+	/** Debugging message. */
+	USB_LOG_LEVEL_DEBUG,
+
+	/** More detailed debugging message. */
+	USB_LOG_LEVEL_DEBUG2,
+
+	/** Terminating constant for logging levels. */
+	USB_LOG_LEVEL_MAX
+} usb_log_level_t;
+
+/** Default log level. */
+#ifdef CONFIG_USB_RELEASE_BUILD
+#  define USB_LOG_LEVEL_DEFAULT USB_LOG_LEVEL_INFO
+#else
+#  define USB_LOG_LEVEL_DEFAULT USB_LOG_LEVEL_DEBUG
+#endif
+
+void usb_log_enable(usb_log_level_t, const char *);
+
+void usb_log_printf(usb_log_level_t, const char *, ...)
+	PRINTF_ATTRIBUTE(2, 3);
+
+/** Log fatal error. */
+#define usb_log_fatal(format, ...) \
+	usb_log_printf(USB_LOG_LEVEL_FATAL, format, ##__VA_ARGS__)
+
+/** Log normal (recoverable) error. */
+#define usb_log_error(format, ...) \
+	usb_log_printf(USB_LOG_LEVEL_ERROR, format, ##__VA_ARGS__)
+
+/** Log warning. */
+#define usb_log_warning(format, ...) \
+	usb_log_printf(USB_LOG_LEVEL_WARNING, format, ##__VA_ARGS__)
+
+/** Log informational message. */
+#define usb_log_info(format, ...) \
+	usb_log_printf(USB_LOG_LEVEL_INFO, format, ##__VA_ARGS__)
+
+/** Log debugging message. */
+#define usb_log_debug(format, ...) \
+	usb_log_printf(USB_LOG_LEVEL_DEBUG, format, ##__VA_ARGS__)
+
+/** Log verbose debugging message. */
+#define usb_log_debug2(format, ...) \
+	usb_log_printf(USB_LOG_LEVEL_DEBUG2, format, ##__VA_ARGS__)
+
+const char *usb_debug_str_buffer(const uint8_t *, size_t, size_t);
+
+
+#endif
+/**
+ * @}
+ */
+
Index: uspace/lib/usb/include/usb/descriptor.h
===================================================================
--- uspace/lib/usb/include/usb/descriptor.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usb/include/usb/descriptor.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,214 @@
+/*
+ * Copyright (c) 2010 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * Standard USB descriptors.
+ */
+#ifndef LIBUSB_DESCRIPTOR_H_
+#define LIBUSB_DESCRIPTOR_H_
+
+#include <async.h>
+
+/** Descriptor type. */
+typedef enum {
+	USB_DESCTYPE_DEVICE = 1,
+	USB_DESCTYPE_CONFIGURATION = 2,
+	USB_DESCTYPE_STRING = 3,
+	USB_DESCTYPE_INTERFACE = 4,
+	USB_DESCTYPE_ENDPOINT = 5,
+	USB_DESCTYPE_HID = 0x21,
+	USB_DESCTYPE_HID_REPORT = 0x22,
+	USB_DESCTYPE_HID_PHYSICAL = 0x23,
+	USB_DESCTYPE_HUB = 0x29,
+	/* USB_DESCTYPE_ = */
+} usb_descriptor_type_t;
+
+/** Standard USB device descriptor.
+ */
+typedef struct {
+	/** Size of this descriptor in bytes. */
+	uint8_t length;
+	/** Descriptor type (USB_DESCTYPE_DEVICE). */
+	uint8_t descriptor_type;
+	/** USB specification release number.
+	 * The number shall be coded as binary-coded decimal (BCD).
+	 */
+	uint16_t usb_spec_version;
+	/** Device class. */
+	uint8_t device_class;
+	/** Device sub-class. */
+	uint8_t device_subclass;
+	/** Device protocol. */
+	uint8_t device_protocol;
+	/** Maximum packet size for endpoint zero.
+	 * Valid values are only 8, 16, 32, 64).
+	 */
+	uint8_t max_packet_size;
+	/** Vendor ID. */
+	uint16_t vendor_id;
+	/** Product ID. */
+	uint16_t product_id;
+	/** Device release number (in BCD). */
+	uint16_t device_version;
+	/** Manufacturer descriptor index. */
+	uint8_t str_manufacturer;
+	/** Product descriptor index. */
+	uint8_t str_product;
+	/** Device serial number descriptor index. */
+	uint8_t str_serial_number;
+	/** Number of possible configurations. */
+	uint8_t configuration_count;
+} __attribute__ ((packed)) usb_standard_device_descriptor_t;
+
+/** Standard USB configuration descriptor.
+ */
+typedef struct {
+	/** Size of this descriptor in bytes. */
+	uint8_t length;
+	/** Descriptor type (USB_DESCTYPE_CONFIGURATION). */
+	uint8_t descriptor_type;
+	/** Total length of all data of this configuration.
+	 * This includes the combined length of all descriptors
+	 * (configuration, interface, endpoint, class-specific and
+	 * vendor-specific) valid for this configuration.
+	 */
+	uint16_t total_length;
+	/** Number of possible interfaces under this configuration. */
+	uint8_t interface_count;
+	/** Configuration value used when setting this configuration. */
+	uint8_t configuration_number;
+	/** String descriptor describing this configuration. */
+	uint8_t str_configuration;
+	/** Attribute bitmap. */
+	uint8_t attributes;
+	/** Maximum power consumption from the USB under this configuration.
+	 * Expressed in 2mA unit (e.g. 50 ~ 100mA).
+	 */
+	uint8_t max_power;
+} __attribute__ ((packed)) usb_standard_configuration_descriptor_t;
+
+/** Standard USB interface descriptor.
+ */
+typedef struct {
+	/** Size of this descriptor in bytes. */
+	uint8_t length;
+	/** Descriptor type (USB_DESCTYPE_INTERFACE). */
+	uint8_t descriptor_type;
+	/** Number of interface.
+	 * Zero-based index into array of interfaces for current configuration.
+	 */
+	uint8_t interface_number;
+	/** Alternate setting for value in interface_number. */
+	uint8_t alternate_setting;
+	/** Number of endpoints used by this interface.
+	 * This number must exclude usage of endpoint zero
+	 * (default control pipe).
+	 */
+	uint8_t endpoint_count;
+	/** Class code. */
+	uint8_t interface_class;
+	/** Subclass code. */
+	uint8_t interface_subclass;
+	/** Protocol code. */
+	uint8_t interface_protocol;
+	/** String descriptor describing this interface. */
+	uint8_t str_interface;
+} __attribute__ ((packed)) usb_standard_interface_descriptor_t;
+
+/** Standard USB endpoint descriptor.
+ */
+typedef struct {
+	/** Size of this descriptor in bytes. */
+	uint8_t length;
+	/** Descriptor type (USB_DESCTYPE_ENDPOINT). */
+	uint8_t descriptor_type;
+	/** Endpoint address together with data flow direction. */
+	uint8_t endpoint_address;
+	/** Endpoint attributes.
+	 * Includes transfer type (usb_transfer_type_t).
+	 */
+	uint8_t attributes;
+	/** Maximum packet size. */
+	uint16_t max_packet_size;
+	/** Polling interval in milliseconds.
+	 * Ignored for bulk and control endpoints.
+	 * Isochronous endpoints must use value 1.
+	 * Interrupt endpoints any value from 1 to 255.
+	 */
+	uint8_t poll_interval;
+} __attribute__ ((packed)) usb_standard_endpoint_descriptor_t;
+
+/** Part of standard USB HID descriptor specifying one class descriptor.
+ *
+ * (See HID Specification, p.22)
+ */
+typedef struct {
+	/** Type of class-specific descriptor (Report or Physical). */
+	uint8_t type;
+	/** Length of class-specific descriptor in bytes. */
+	uint16_t length;
+} __attribute__ ((packed)) usb_standard_hid_class_descriptor_info_t;
+
+/** Standard USB HID descriptor.
+ *
+ * (See HID Specification, p.22)
+ *
+ * It is actually only the "header" of the descriptor, it does not contain
+ * the last two mandatory fields (type and length of the first class-specific
+ * descriptor).
+ */
+typedef struct {
+	/** Total size of this descriptor in bytes.
+	 *
+	 * This includes all class-specific descriptor info - type + length
+	 * for each descriptor.
+	 */
+	uint8_t length;
+	/** Descriptor type (USB_DESCTYPE_HID). */
+	uint8_t descriptor_type;
+	/** HID Class Specification release. */
+	uint16_t spec_release;
+	/** Country code of localized hardware. */
+	uint8_t country_code;
+	/** Total number of class-specific (i.e. Report and Physical)
+	 * descriptors.
+	 *
+	 * @note There is always only one Report descriptor.
+	 */
+	uint8_t class_desc_count;
+	/** First mandatory class descriptor (Report) info. */
+	usb_standard_hid_class_descriptor_info_t report_desc_info;
+} __attribute__ ((packed)) usb_standard_hid_descriptor_t;
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usb/include/usb/hc.h
===================================================================
--- uspace/lib/usb/include/usb/hc.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usb/include/usb/hc.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * General communication with host controller driver.
+ */
+#ifndef LIBUSB_HC_H_
+#define LIBUSB_HC_H_
+
+#include <sys/types.h>
+#include <ipc/devman.h>
+#include <ddf/driver.h>
+#include <bool.h>
+#include <async.h>
+#include <usb/usb.h>
+
+/** Connection to the host controller driver. */
+typedef struct {
+	/** Devman handle of the host controller. */
+	devman_handle_t hc_handle;
+	/** Session to the host controller. */
+	async_sess_t *hc_sess;
+} usb_hc_connection_t;
+
+int usb_hc_connection_initialize_from_device(usb_hc_connection_t *,
+    ddf_dev_t *);
+int usb_hc_connection_initialize(usb_hc_connection_t *, devman_handle_t);
+
+int usb_hc_connection_open(usb_hc_connection_t *);
+bool usb_hc_connection_is_opened(const usb_hc_connection_t *);
+int usb_hc_connection_close(usb_hc_connection_t *);
+int usb_hc_get_handle_by_address(usb_hc_connection_t *, usb_address_t,
+    devman_handle_t *);
+
+int usb_hc_get_address_by_handle(devman_handle_t);
+
+int usb_hc_find(devman_handle_t, devman_handle_t *);
+
+int usb_resolve_device_handle(const char *, devman_handle_t *, usb_address_t *,
+    devman_handle_t *);
+
+int usb_ddf_get_hc_handle_by_class(size_t, devman_handle_t *);
+
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usb/include/usb/usb.h
===================================================================
--- uspace/lib/usb/include/usb/usb.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usb/include/usb/usb.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,180 @@
+/*
+ * Copyright (c) 2010 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * Common USB types and functions.
+ */
+#ifndef LIBUSB_USB_H_
+#define LIBUSB_USB_H_
+
+#include <sys/types.h>
+#include <byteorder.h>
+
+/** Convert 16bit value from native (host) endianness to USB endianness. */
+#define uint16_host2usb(n) host2uint16_t_le((n))
+
+/** Convert 32bit value from native (host) endianness to USB endianness. */
+#define uint32_host2usb(n) host2uint32_t_le((n))
+
+/** Convert 16bit value from USB endianness into native (host) one. */
+#define uint16_usb2host(n) uint16_t_le2host((n))
+
+/** Convert 32bit value from USB endianness into native (host) one. */
+#define uint32_usb2host(n) uint32_t_le2host((n))
+
+
+/** USB transfer type. */
+typedef enum {
+	USB_TRANSFER_CONTROL = 0,
+	USB_TRANSFER_ISOCHRONOUS = 1,
+	USB_TRANSFER_BULK = 2,
+	USB_TRANSFER_INTERRUPT = 3
+} usb_transfer_type_t;
+
+const char * usb_str_transfer_type(usb_transfer_type_t t);
+const char * usb_str_transfer_type_short(usb_transfer_type_t t);
+
+/** USB data transfer direction. */
+typedef enum {
+	USB_DIRECTION_IN,
+	USB_DIRECTION_OUT,
+	USB_DIRECTION_BOTH
+} usb_direction_t;
+
+/** USB speeds. */
+typedef enum {
+	/** USB 1.1 low speed (1.5Mbits/s). */
+	USB_SPEED_LOW,
+	/** USB 1.1 full speed (12Mbits/s). */
+	USB_SPEED_FULL,
+	/** USB 2.0 high speed (480Mbits/s). */
+	USB_SPEED_HIGH,
+	/** Psuedo-speed serving as a boundary. */
+	USB_SPEED_MAX
+} usb_speed_t;
+
+const char *usb_str_speed(usb_speed_t);
+
+
+/** USB request type target. */
+typedef enum {
+	USB_REQUEST_TYPE_STANDARD = 0,
+	USB_REQUEST_TYPE_CLASS = 1,
+	USB_REQUEST_TYPE_VENDOR = 2
+} usb_request_type_t;
+
+/** USB request recipient. */
+typedef enum {
+	USB_REQUEST_RECIPIENT_DEVICE = 0,
+	USB_REQUEST_RECIPIENT_INTERFACE = 1,
+	USB_REQUEST_RECIPIENT_ENDPOINT = 2,
+	USB_REQUEST_RECIPIENT_OTHER = 3
+} usb_request_recipient_t;
+
+/** USB address type.
+ * Negative values could be used to indicate error.
+ */
+typedef int usb_address_t;
+
+/** Default USB address. */
+#define USB_ADDRESS_DEFAULT 0
+/** Maximum address number in USB 1.1. */
+#define USB11_ADDRESS_MAX 128
+
+/** USB endpoint number type.
+ * Negative values could be used to indicate error.
+ */
+typedef int usb_endpoint_t;
+
+/** Maximum endpoint number in USB 1.1.
+ */
+#define USB11_ENDPOINT_MAX 16
+
+
+/** USB complete address type. 
+ * Pair address + endpoint is identification of transaction recipient.
+ */
+typedef struct {
+	usb_address_t address;
+	usb_endpoint_t endpoint;
+} usb_target_t;
+
+/** Compare USB targets (addresses and endpoints).
+ *
+ * @param a First target.
+ * @param b Second target.
+ * @return Whether @p a and @p b points to the same pipe on the same device.
+ */
+static inline int usb_target_same(usb_target_t a, usb_target_t b)
+{
+	return (a.address == b.address)
+	    && (a.endpoint == b.endpoint);
+}
+
+/** General handle type.
+ * Used by various USB functions as opaque handle.
+ */
+typedef sysarg_t usb_handle_t;
+
+/** USB packet identifier. */
+typedef enum {
+#define _MAKE_PID_NIBBLE(tag, type) \
+	((uint8_t)(((tag) << 2) | (type)))
+#define _MAKE_PID(tag, type) \
+	( \
+	    _MAKE_PID_NIBBLE(tag, type) \
+	    | ((~_MAKE_PID_NIBBLE(tag, type)) << 4) \
+	)
+	USB_PID_OUT = _MAKE_PID(0, 1),
+	USB_PID_IN = _MAKE_PID(2, 1),
+	USB_PID_SOF = _MAKE_PID(1, 1),
+	USB_PID_SETUP = _MAKE_PID(3, 1),
+
+	USB_PID_DATA0 = _MAKE_PID(0 ,3),
+	USB_PID_DATA1 = _MAKE_PID(2 ,3),
+
+	USB_PID_ACK = _MAKE_PID(0 ,2),
+	USB_PID_NAK = _MAKE_PID(2 ,2),
+	USB_PID_STALL = _MAKE_PID(3 ,2),
+
+	USB_PID_PRE = _MAKE_PID(3 ,0),
+	/* USB_PID_ = _MAKE_PID( ,), */
+#undef _MAKE_PID
+#undef _MAKE_PID_NIBBLE
+} usb_packet_id;
+
+/** Class name for USB host controllers. */
+#define USB_HC_DDF_CLASS_NAME "usbhc"
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usb/src/class.c
===================================================================
--- uspace/lib/usb/src/class.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usb/src/class.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2010 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * @brief Class related functions.
+ */
+#include <usb/classes/classes.h>
+#include <errno.h>
+
+/** Tell string representation of USB class.
+ *
+ * @param cls Class code.
+ * @return String representation.
+ */
+const char *usb_str_class(usb_class_t cls)
+{
+	switch (cls) {
+		case USB_CLASS_USE_INTERFACE:
+			return "use-interface";
+		case USB_CLASS_AUDIO:
+			return "audio";
+		case USB_CLASS_COMMUNICATIONS_CDC_CONTROL:
+			return "communications";
+		case USB_CLASS_HID:
+			return "HID";
+		case USB_CLASS_PHYSICAL:
+			return "physical";
+		case USB_CLASS_IMAGE:
+			return "image";
+		case USB_CLASS_PRINTER:
+			return "printer";
+		case USB_CLASS_MASS_STORAGE:
+			return "mass-storage";
+		case USB_CLASS_HUB:
+			return "hub";
+		case USB_CLASS_CDC_DATA:
+			return "CDC";
+		case USB_CLASS_SMART_CARD:
+			return "smart-card";
+		case USB_CLASS_CONTENT_SECURITY:
+			return "security";
+		case USB_CLASS_VIDEO:
+			return "video";
+		case USB_CLASS_PERSONAL_HEALTHCARE:
+			return "healthcare";
+		case USB_CLASS_DIAGNOSTIC:
+			return "diagnostic";
+		case USB_CLASS_WIRELESS_CONTROLLER:
+			return "wireless";
+		case USB_CLASS_MISCELLANEOUS:
+			return "misc";
+		case USB_CLASS_APPLICATION_SPECIFIC:
+			return "application";
+		case USB_CLASS_VENDOR_SPECIFIC:
+			return "vendor";
+		default:
+			return "unknown";
+	}
+}
+
+
+/**
+ * @}
+ */
Index: uspace/lib/usb/src/ddfiface.c
===================================================================
--- uspace/lib/usb/src/ddfiface.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usb/src/ddfiface.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,175 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * Implementations of DDF interfaces functions (actual implementation).
+ */
+#include <ipc/devman.h>
+#include <devman.h>
+#include <async.h>
+#include <usb/ddfiface.h>
+#include <usb/hc.h>
+#include <usb/debug.h>
+#include <errno.h>
+#include <assert.h>
+
+/** DDF interface for USB device, implementation for typical hub. */
+usb_iface_t  usb_iface_hub_impl = {
+	.get_hc_handle = usb_iface_get_hc_handle_hub_impl,
+	.get_address = usb_iface_get_address_hub_impl
+};
+
+/** DDF interface for USB device, implementation for child of a typical hub. */
+usb_iface_t  usb_iface_hub_child_impl = {
+	.get_hc_handle = usb_iface_get_hc_handle_hub_child_impl,
+	.get_address = usb_iface_get_address_hub_child_impl
+};
+
+
+/** Get host controller handle, interface implementation for hub driver.
+ *
+ * @param[in] fun Device function the operation is running on.
+ * @param[out] handle Storage for the host controller handle.
+ * @return Error code.
+ */
+int usb_iface_get_hc_handle_hub_impl(ddf_fun_t *fun, devman_handle_t *handle)
+{
+	assert(fun);
+	return usb_hc_find(fun->handle, handle);
+}
+
+/** Get host controller handle, interface implementation for child of
+ * a hub driver.
+ *
+ * @param[in] fun Device function the operation is running on.
+ * @param[out] handle Storage for the host controller handle.
+ * @return Error code.
+ */
+int usb_iface_get_hc_handle_hub_child_impl(ddf_fun_t *fun,
+    devman_handle_t *handle)
+{
+	assert(fun != NULL);
+	
+	async_sess_t *parent_sess =
+	    devman_parent_device_connect(EXCHANGE_SERIALIZE, fun->handle,
+	    IPC_FLAG_BLOCKING);
+	if (!parent_sess)
+		return ENOMEM;
+	
+	async_exch_t *exch = async_exchange_begin(parent_sess);
+	
+	sysarg_t hc_handle;
+	int rc = async_req_1_1(exch, DEV_IFACE_ID(USB_DEV_IFACE),
+	    IPC_M_USB_GET_HOST_CONTROLLER_HANDLE, &hc_handle);
+	
+	async_exchange_end(exch);
+	async_hangup(parent_sess);
+	
+	if (rc != EOK)
+		return rc;
+	
+	*handle = hc_handle;
+	return EOK;
+}
+
+/** Get host controller handle, interface implementation for HC driver.
+ *
+ * @param[in] fun Device function the operation is running on.
+ * @param[out] handle Storage for the host controller handle.
+ * @return Always EOK.
+ */
+int usb_iface_get_hc_handle_hc_impl(ddf_fun_t *fun, devman_handle_t *handle)
+{
+	assert(fun);
+
+	if (handle != NULL) {
+		*handle = fun->handle;
+	}
+
+	return EOK;
+}
+
+/** Get USB device address, interface implementation for hub driver.
+ *
+ * @param[in] fun Device function the operation is running on.
+ * @param[in] handle Devman handle of USB device we want address of.
+ * @param[out] address Storage for USB address of device with handle @p handle.
+ * @return Error code.
+ */
+int usb_iface_get_address_hub_impl(ddf_fun_t *fun, devman_handle_t handle,
+    usb_address_t *address)
+{
+	assert(fun);
+	
+	async_sess_t *parent_sess =
+	    devman_parent_device_connect(EXCHANGE_SERIALIZE, fun->handle,
+	    IPC_FLAG_BLOCKING);
+	if (!parent_sess)
+		return ENOMEM;
+	
+	async_exch_t *exch = async_exchange_begin(parent_sess);
+	
+	sysarg_t addr;
+	int rc = async_req_2_1(exch, DEV_IFACE_ID(USB_DEV_IFACE),
+	    IPC_M_USB_GET_ADDRESS, handle, &addr);
+	
+	async_exchange_end(exch);
+	async_hangup(parent_sess);
+	
+	if (rc != EOK)
+		return rc;
+	
+	if (address != NULL)
+		*address = (usb_address_t) addr;
+	
+	return EOK;
+}
+
+/** Get USB device address, interface implementation for child of
+ * a hub driver.
+ *
+ * @param[in] fun Device function the operation is running on.
+ * @param[in] handle Devman handle of USB device we want address of.
+ * @param[out] address Storage for USB address of device with handle @p handle.
+ * @return Error code.
+ */
+int usb_iface_get_address_hub_child_impl(ddf_fun_t *fun,
+    devman_handle_t handle, usb_address_t *address)
+{
+	if (handle == 0) {
+		handle = fun->handle;
+	}
+	return usb_iface_get_address_hub_impl(fun, handle, address);
+}
+
+/**
+ * @}
+ */
Index: uspace/lib/usb/src/debug.c
===================================================================
--- uspace/lib/usb/src/debug.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usb/src/debug.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,268 @@
+/*
+ * Copyright (c) 2010-2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * Debugging and logging support.
+ */
+#include <adt/list.h>
+#include <fibril_synch.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <usb/debug.h>
+
+/** Level of logging messages. */
+static usb_log_level_t log_level = USB_LOG_LEVEL_WARNING;
+
+/** Prefix for logging messages. */
+static const char *log_prefix = "usb";
+
+/** Serialization mutex for logging functions. */
+static FIBRIL_MUTEX_INITIALIZE(log_serializer);
+
+/** File where to store the log. */
+static FILE *log_stream = NULL;
+
+
+/** Enable logging.
+ *
+ * @param level Maximal enabled level (including this one).
+ * @param message_prefix Prefix for each printed message.
+ */
+void usb_log_enable(usb_log_level_t level, const char *message_prefix)
+{
+	log_prefix = message_prefix;
+	log_level = level;
+	if (log_stream == NULL) {
+		char *fname;
+		int rc = asprintf(&fname, "/log/%s", message_prefix);
+		if (rc > 0) {
+			log_stream = fopen(fname, "w");
+			free(fname);
+		}
+	}
+}
+
+/** Get log level name prefix.
+ *
+ * @param level Log level.
+ * @return String prefix for the message.
+ */
+static const char *log_level_name(usb_log_level_t level)
+{
+	switch (level) {
+		case USB_LOG_LEVEL_FATAL:
+			return " FATAL";
+		case USB_LOG_LEVEL_ERROR:
+			return " ERROR";
+		case USB_LOG_LEVEL_WARNING:
+			return " WARN";
+		case USB_LOG_LEVEL_INFO:
+			return " info";
+		default:
+			return "";
+	}
+}
+
+/** Print logging message.
+ *
+ * @param level Verbosity level of the message.
+ * @param format Formatting directive.
+ */
+void usb_log_printf(usb_log_level_t level, const char *format, ...)
+{
+	FILE *screen_stream = NULL;
+	switch (level) {
+		case USB_LOG_LEVEL_FATAL:
+		case USB_LOG_LEVEL_ERROR:
+			screen_stream = stderr;
+			break;
+		default:
+			screen_stream = stdout;
+			break;
+	}
+	assert(screen_stream != NULL);
+
+	va_list args;
+
+	/*
+	 * Serialize access to log files.
+	 * Print to screen only messages with higher level than the one
+	 * specified during logging initialization.
+	 * Print also to file, to it print one more (lower) level as well.
+	 */
+	fibril_mutex_lock(&log_serializer);
+
+	const char *level_name = log_level_name(level);
+
+	if ((log_stream != NULL) && (level <= log_level + 1)) {
+		va_start(args, format);
+
+		fprintf(log_stream, "[%s]%s: ", log_prefix, level_name);
+		vfprintf(log_stream, format, args);
+		fflush(log_stream);
+
+		va_end(args);
+	}
+
+	if (level <= log_level) {
+		va_start(args, format);
+
+		fprintf(screen_stream, "[%s]%s: ", log_prefix, level_name);
+		vfprintf(screen_stream, format, args);
+		fflush(screen_stream);
+
+		va_end(args);
+	}
+
+	fibril_mutex_unlock(&log_serializer);
+}
+
+
+#define REMAINDER_STR_FMT " (%zu)..."
+/* string + terminator + number width (enough for 4GB)*/
+#define REMAINDER_STR_LEN (5 + 1 + 10)
+
+/** How many bytes to group together. */
+#define BUFFER_DUMP_GROUP_SIZE 4
+
+/** Size of the string for buffer dumps. */
+#define BUFFER_DUMP_LEN 240 /* Ought to be enough for everybody ;-). */
+
+/** Fibril local storage for the dumped buffer. */
+static fibril_local char buffer_dump[2][BUFFER_DUMP_LEN];
+/** Fibril local storage for buffer switching. */
+static fibril_local int buffer_dump_index = 0;
+
+/** Dump buffer into string.
+ *
+ * The function dumps given buffer into hexadecimal format and stores it
+ * in a static fibril local string.
+ * That means that you do not have to deallocate the string (actually, you
+ * can not do that) and you do not have to guard it against concurrent
+ * calls to it.
+ * The only limitation is that each second call rewrites the buffer again
+ * (internally, two buffer are used in cyclic manner).
+ * Thus, it is necessary to copy the buffer elsewhere (that includes printing
+ * to screen or writing to file).
+ * Since this function is expected to be used for debugging prints only,
+ * that is not a big limitation.
+ *
+ * @warning You cannot use this function more than twice in the same printf
+ * (see detailed explanation).
+ *
+ * @param buffer Buffer to be printed (can be NULL).
+ * @param size Size of the buffer in bytes (can be zero).
+ * @param dumped_size How many bytes to actually dump (zero means all).
+ * @return Dumped buffer as a static (but fibril local) string.
+ */
+const char *usb_debug_str_buffer(const uint8_t *buffer, size_t size,
+    size_t dumped_size)
+{
+	/*
+	 * Remove previous string.
+	 */
+	bzero(buffer_dump[buffer_dump_index], BUFFER_DUMP_LEN);
+
+	if (buffer == NULL) {
+		return "(null)";
+	}
+	if (size == 0) {
+		return "(empty)";
+	}
+	if ((dumped_size == 0) || (dumped_size > size)) {
+		dumped_size = size;
+	}
+
+	/* How many bytes are available in the output buffer. */
+	size_t buffer_remaining_size = BUFFER_DUMP_LEN - 1 - REMAINDER_STR_LEN;
+	char *it = buffer_dump[buffer_dump_index];
+
+	size_t index = 0;
+
+	while (index < size) {
+		/* Determine space before the number. */
+		const char *space_before;
+		if (index == 0) {
+			space_before = "";
+		} else if ((index % BUFFER_DUMP_GROUP_SIZE) == 0) {
+			space_before = "  ";
+		} else {
+			space_before = " ";
+		}
+
+		/*
+		 * Add the byte as a hexadecimal number plus the space.
+		 * We do it into temporary buffer to ensure that always
+		 * the whole byte is printed.
+		 */
+		int val = buffer[index];
+		char current_byte[16];
+		int printed = snprintf(current_byte, 16,
+		    "%s%02x", space_before, val);
+		if (printed < 0) {
+			break;
+		}
+
+		if ((size_t) printed > buffer_remaining_size) {
+			break;
+		}
+
+		/* We can safely add 1, because space for end 0 is reserved. */
+		str_append(it, buffer_remaining_size + 1, current_byte);
+
+		buffer_remaining_size -= printed;
+		/* Point at the terminator 0. */
+		it += printed;
+		index++;
+
+		if (index >= dumped_size) {
+			break;
+		}
+	}
+
+	/* Add how many bytes were not printed. */
+	if (index < size) {
+		snprintf(it, REMAINDER_STR_LEN,
+		    REMAINDER_STR_FMT, size - index);
+	}
+
+	/* Next time, use the other buffer. */
+	buffer_dump_index = 1 - buffer_dump_index;
+
+	/* Need to take the old one due to previous line. */
+	return buffer_dump[1 - buffer_dump_index];
+}
+
+
+/**
+ * @}
+ */
Index: uspace/lib/usb/src/dump.c
===================================================================
--- uspace/lib/usb/src/dump.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usb/src/dump.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,291 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * Descriptor dumping.
+ */
+#include <adt/list.h>
+#include <fibril_synch.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <usb/debug.h>
+#include <usb/descriptor.h>
+#include <usb/classes/classes.h>
+
+/** Mapping between descriptor id and dumping function. */
+typedef struct {
+	/** Descriptor id. */
+	int id;
+	/** Dumping function. */
+	void (*dump)(FILE *, const char *, const char *,
+	    const uint8_t *, size_t);
+} descriptor_dump_t;
+
+static void usb_dump_descriptor_device(FILE *, const char *, const char *,
+    const uint8_t *, size_t);
+static void usb_dump_descriptor_configuration(FILE *, const char *, const char *,
+    const uint8_t *, size_t);
+static void usb_dump_descriptor_interface(FILE *, const char *, const char *,
+    const uint8_t *, size_t);
+static void usb_dump_descriptor_string(FILE *, const char *, const char *,
+    const uint8_t *, size_t);
+static void usb_dump_descriptor_endpoint(FILE *, const char *, const char *,
+    const uint8_t *, size_t);
+static void usb_dump_descriptor_hid(FILE *, const char *, const char *,
+    const uint8_t *, size_t);
+static void usb_dump_descriptor_hub(FILE *, const char *, const char *,
+    const uint8_t *, size_t);
+static void usb_dump_descriptor_generic(FILE *, const char *, const char *,
+    const uint8_t *, size_t);
+
+/** Descriptor dumpers mapping. */
+static descriptor_dump_t descriptor_dumpers[] = {
+	{ USB_DESCTYPE_DEVICE, usb_dump_descriptor_device },
+	{ USB_DESCTYPE_CONFIGURATION, usb_dump_descriptor_configuration },
+	{ USB_DESCTYPE_STRING, usb_dump_descriptor_string },
+	{ USB_DESCTYPE_INTERFACE, usb_dump_descriptor_interface },
+	{ USB_DESCTYPE_ENDPOINT, usb_dump_descriptor_endpoint },
+	{ USB_DESCTYPE_HID, usb_dump_descriptor_hid },
+	{ USB_DESCTYPE_HUB, usb_dump_descriptor_hub },
+	{ -1, usb_dump_descriptor_generic },
+	{ -1, NULL }
+};
+
+/** Dumps standard USB descriptor.
+ * The @p line_suffix must contain the newline <code>\\n</code> character.
+ * When @p line_suffix or @p line_prefix is NULL, they are substitued with
+ * default values
+ * (<code> - </code> for prefix and line termination for suffix).
+ *
+ * @param output Output file stream to dump descriptor to.
+ * @param line_prefix Prefix for each line of output.
+ * @param line_suffix Suffix of each line of output.
+ * @param descriptor Actual descriptor.
+ * @param descriptor_length Descriptor size.
+ */
+void usb_dump_standard_descriptor(FILE *output,
+    const char *line_prefix, const char *line_suffix,
+    const uint8_t *descriptor, size_t descriptor_length)
+{
+	if (descriptor_length < 2) {
+		return;
+	}
+	int type = descriptor[1];
+
+	descriptor_dump_t *dumper = descriptor_dumpers;
+	while (dumper->dump != NULL) {
+		if ((dumper->id == type) || (dumper->id < 0)) {
+			dumper->dump(output, line_prefix, line_suffix,
+			    descriptor, descriptor_length);
+			return;
+		}
+		dumper++;
+	}
+}
+
+/** Prints single line of USB descriptor dump.
+ * @warning This macro abuses heavily the naming conventions used
+ * by all dumping functions (i.e. names for output file stream (@c output) and
+ * line prefix and suffix (@c line_prefix and @c line_suffix respectively))-
+ *
+ * @param fmt Formatting string.
+ */
+#define PRINTLINE(fmt, ...) \
+	fprintf(output, "%s" fmt "%s", \
+	    line_prefix ? line_prefix : " - ", \
+	    __VA_ARGS__, \
+	    line_suffix ? line_suffix : "\n")
+
+#define BCD_INT(a) (((unsigned int)(a)) / 256)
+#define BCD_FRAC(a) (((unsigned int)(a)) % 256)
+
+#define BCD_FMT "%x.%x"
+#define BCD_ARGS(a) BCD_INT((a)), BCD_FRAC((a))
+
+static void usb_dump_descriptor_device(FILE *output,
+    const char *line_prefix, const char *line_suffix,
+    const uint8_t *descriptor, size_t descriptor_length)
+{
+	usb_standard_device_descriptor_t *d
+	    = (usb_standard_device_descriptor_t *) descriptor;
+	if (descriptor_length < sizeof(*d)) {
+		return;
+	}
+
+	PRINTLINE("bLength = %d", d->length);
+	PRINTLINE("bDescriptorType = 0x%02x", d->descriptor_type);
+	PRINTLINE("bcdUSB = %d (" BCD_FMT ")", d->usb_spec_version,
+	    BCD_ARGS(d->usb_spec_version));
+	PRINTLINE("bDeviceClass = 0x%02x", d->device_class);
+	PRINTLINE("bDeviceSubClass = 0x%02x", d->device_subclass);
+	PRINTLINE("bDeviceProtocol = 0x%02x", d->device_protocol);
+	PRINTLINE("bMaxPacketSize0 = %d", d->max_packet_size);
+	PRINTLINE("idVendor = 0x%04x", d->vendor_id);
+	PRINTLINE("idProduct = 0x%04x", d->product_id);
+	PRINTLINE("bcdDevice = %d", d->device_version);
+	PRINTLINE("iManufacturer = %d", d->str_manufacturer);
+	PRINTLINE("iProduct = %d", d->str_product);
+	PRINTLINE("iSerialNumber = %d", d->str_serial_number);
+	PRINTLINE("bNumConfigurations = %d", d->configuration_count);
+}
+
+static void usb_dump_descriptor_configuration(FILE *output,
+    const char *line_prefix, const char *line_suffix,
+    const uint8_t *descriptor, size_t descriptor_length)
+{
+	usb_standard_configuration_descriptor_t *d
+	    = (usb_standard_configuration_descriptor_t *) descriptor;
+	if (descriptor_length < sizeof(*d)) {
+		return;
+	}
+
+	bool self_powered = d->attributes & 64;
+	bool remote_wakeup = d->attributes & 32;
+
+	PRINTLINE("bLength = %d", d->length);
+	PRINTLINE("bDescriptorType = 0x%02x", d->descriptor_type);
+	PRINTLINE("wTotalLength = %d", d->total_length);
+	PRINTLINE("bNumInterfaces = %d", d->interface_count);
+	PRINTLINE("bConfigurationValue = %d", d->configuration_number);
+	PRINTLINE("iConfiguration = %d", d->str_configuration);
+	PRINTLINE("bmAttributes = %d [%s%s%s]", d->attributes,
+	    self_powered ? "self-powered" : "",
+	    (self_powered & remote_wakeup) ? ", " : "",
+	    remote_wakeup ? "remote-wakeup" : "");
+	PRINTLINE("MaxPower = %d (%dmA)", d->max_power,
+	    2 * d->max_power);
+}
+
+static void usb_dump_descriptor_interface(FILE *output,
+    const char *line_prefix, const char *line_suffix,
+    const uint8_t *descriptor, size_t descriptor_length)
+{
+	usb_standard_interface_descriptor_t *d
+	    = (usb_standard_interface_descriptor_t *) descriptor;
+	if (descriptor_length < sizeof(*d)) {
+		return;
+	}
+
+	PRINTLINE("bLength = %d", d->length);
+	PRINTLINE("bDescriptorType = 0x%02x", d->descriptor_type);
+	PRINTLINE("bInterfaceNumber = %d", d->interface_number);
+	PRINTLINE("bAlternateSetting = %d", d->alternate_setting);
+	PRINTLINE("bNumEndpoints = %d", d->endpoint_count);
+	PRINTLINE("bInterfaceClass = %s", d->interface_class == 0
+	    ? "reserved (0)" : usb_str_class(d->interface_class));
+	PRINTLINE("bInterfaceSubClass = %d", d->interface_subclass);
+	PRINTLINE("bInterfaceProtocol = %d", d->interface_protocol);
+	PRINTLINE("iInterface = %d", d->str_interface);
+}
+
+static void usb_dump_descriptor_string(FILE *output,
+    const char *line_prefix, const char *line_suffix,
+    const uint8_t *descriptor, size_t descriptor_length)
+{
+}
+
+static void usb_dump_descriptor_endpoint(FILE *output,
+    const char *line_prefix, const char *line_suffix,
+    const uint8_t *descriptor, size_t descriptor_length)
+{
+	usb_standard_endpoint_descriptor_t *d
+	   = (usb_standard_endpoint_descriptor_t *) descriptor;
+	if (descriptor_length < sizeof(*d)) {
+		return;
+	}
+
+	int endpoint = d->endpoint_address & 15;
+	usb_direction_t direction = d->endpoint_address & 128
+	    ? USB_DIRECTION_IN : USB_DIRECTION_OUT;
+	usb_transfer_type_t transfer_type = d->attributes & 3;
+
+	PRINTLINE("bLength = %d", d->length);
+	PRINTLINE("bDescriptorType = 0x%02X", d->descriptor_type);
+	PRINTLINE("bEndpointAddress = 0x%02X [%d, %s]",
+	    d->endpoint_address, endpoint,
+	    direction == USB_DIRECTION_IN ? "in" : "out");
+	PRINTLINE("bmAttributes = %d [%s]", d->attributes,
+	    usb_str_transfer_type(transfer_type));
+	PRINTLINE("wMaxPacketSize = %d", d->max_packet_size);
+	PRINTLINE("bInterval = %dms", d->poll_interval);
+}
+
+static void usb_dump_descriptor_hid(FILE *output,
+    const char *line_prefix, const char *line_suffix,
+    const uint8_t *descriptor, size_t descriptor_length)
+{
+	usb_standard_hid_descriptor_t *d
+	    = (usb_standard_hid_descriptor_t *) descriptor;
+	if (descriptor_length < sizeof(*d)) {
+		return;
+	}
+
+	PRINTLINE("bLength = %d", d->length);
+	PRINTLINE("bDescriptorType = 0x%02x", d->descriptor_type);
+	PRINTLINE("bcdHID = %d (" BCD_FMT ")", d->spec_release,
+	    BCD_ARGS(d->spec_release));
+	PRINTLINE("bCountryCode = %d", d->country_code);
+	PRINTLINE("bNumDescriptors = %d", d->class_desc_count);
+	PRINTLINE("bDescriptorType = %d", d->report_desc_info.type);
+	PRINTLINE("wDescriptorLength = %d", d->report_desc_info.length);
+
+	/* Print info about report descriptors. */
+	size_t i;
+	size_t count = (descriptor_length - sizeof(*d))
+	    / sizeof(usb_standard_hid_class_descriptor_info_t);
+	usb_standard_hid_class_descriptor_info_t *d2
+	    = (usb_standard_hid_class_descriptor_info_t *)
+	    (descriptor + sizeof(*d));
+	for (i = 0; i < count; i++, d2++) {
+		PRINTLINE("bDescriptorType = %d", d2->type);
+		PRINTLINE("wDescriptorLength = %d", d2->length);
+	}
+}
+
+static void usb_dump_descriptor_hub(FILE *output,
+    const char *line_prefix, const char *line_suffix,
+    const uint8_t *descriptor, size_t descriptor_length)
+{
+	/* TODO */
+}
+
+static void usb_dump_descriptor_generic(FILE *output,
+    const char *line_prefix, const char *line_suffix,
+    const uint8_t *descriptor, size_t descriptor_length)
+{
+	/* TODO */
+}
+
+
+/**
+ * @}
+ */
Index: uspace/lib/usb/src/hc.c
===================================================================
--- uspace/lib/usb/src/hc.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usb/src/hc.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,268 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * General communication with host controller driver (implementation).
+ */
+#include <devman.h>
+#include <async.h>
+#include <dev_iface.h>
+#include <usb_iface.h>
+#include <usbhc_iface.h>
+#include <usb/hc.h>
+#include <usb/debug.h>
+#include <errno.h>
+#include <assert.h>
+
+/** Initialize connection to USB host controller.
+ *
+ * @param connection Connection to be initialized.
+ * @param device Device connecting to the host controller.
+ * @return Error code.
+ */
+int usb_hc_connection_initialize_from_device(usb_hc_connection_t *connection,
+    ddf_dev_t *device)
+{
+	assert(connection);
+
+	if (device == NULL) {
+		return EBADMEM;
+	}
+
+	devman_handle_t hc_handle;
+	int rc = usb_hc_find(device->handle, &hc_handle);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	rc = usb_hc_connection_initialize(connection, hc_handle);
+
+	return rc;
+}
+
+/** Manually initialize connection to USB host controller.
+ *
+ * @param connection Connection to be initialized.
+ * @param hc_handle Devman handle of the host controller.
+ * @return Error code.
+ */
+int usb_hc_connection_initialize(usb_hc_connection_t *connection,
+    devman_handle_t hc_handle)
+{
+	assert(connection);
+
+	connection->hc_handle = hc_handle;
+	connection->hc_sess = NULL;
+
+	return EOK;
+}
+
+/** Open connection to host controller.
+ *
+ * @param connection Connection to the host controller.
+ * @return Error code.
+ */
+int usb_hc_connection_open(usb_hc_connection_t *connection)
+{
+	assert(connection);
+	
+	if (usb_hc_connection_is_opened(connection))
+		return EBUSY;
+	
+	async_sess_t *sess = devman_device_connect(EXCHANGE_SERIALIZE,
+	    connection->hc_handle, 0);
+	if (!sess)
+		return ENOMEM;
+	
+	connection->hc_sess = sess;
+	return EOK;
+}
+
+/** Tells whether connection to host controller is opened.
+ *
+ * @param connection Connection to the host controller.
+ * @return Whether connection is opened.
+ */
+bool usb_hc_connection_is_opened(const usb_hc_connection_t *connection)
+{
+	assert(connection);
+	return (connection->hc_sess != NULL);
+}
+
+/** Close connection to the host controller.
+ *
+ * @param connection Connection to the host controller.
+ * @return Error code.
+ */
+int usb_hc_connection_close(usb_hc_connection_t *connection)
+{
+	assert(connection);
+
+	if (!usb_hc_connection_is_opened(connection)) {
+		return ENOENT;
+	}
+
+	int rc = async_hangup(connection->hc_sess);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	connection->hc_sess = NULL;
+
+	return EOK;
+}
+
+/** Get handle of USB device with given address.
+ *
+ * @param[in] connection Opened connection to host controller.
+ * @param[in] address Address of device in question.
+ * @param[out] handle Where to write the device handle.
+ * @return Error code.
+ */
+int usb_hc_get_handle_by_address(usb_hc_connection_t *connection,
+    usb_address_t address, devman_handle_t *handle)
+{
+	if (!usb_hc_connection_is_opened(connection))
+		return ENOENT;
+	
+	async_exch_t *exch = async_exchange_begin(connection->hc_sess);
+	
+	sysarg_t tmp;
+	int rc = async_req_2_1(exch, DEV_IFACE_ID(USBHC_DEV_IFACE),
+	    IPC_M_USBHC_GET_HANDLE_BY_ADDRESS,
+	    address, &tmp);
+	
+	async_exchange_end(exch);
+	
+	if ((rc == EOK) && (handle != NULL))
+		*handle = tmp;
+	
+	return rc;
+}
+
+/** Tell USB address assigned to device with given handle.
+ *
+ * @param dev_handle Devman handle of the USB device in question.
+ * @return USB address or negative error code.
+ */
+usb_address_t usb_hc_get_address_by_handle(devman_handle_t dev_handle)
+{
+	async_sess_t *parent_sess =
+	    devman_parent_device_connect(EXCHANGE_SERIALIZE, dev_handle,
+	    IPC_FLAG_BLOCKING);
+	if (!parent_sess)
+		return ENOMEM;
+	
+	async_exch_t *exch = async_exchange_begin(parent_sess);
+	
+	sysarg_t address;
+	int rc = async_req_2_1(exch, DEV_IFACE_ID(USB_DEV_IFACE),
+	    IPC_M_USB_GET_ADDRESS,
+	    dev_handle, &address);
+	
+	async_exchange_end(exch);
+	async_hangup(parent_sess);
+	
+	if (rc != EOK)
+		return rc;
+	
+	return (usb_address_t) address;
+}
+
+
+/** Get host controller handle by its class index.
+ *
+ * @param class_index Class index for the host controller.
+ * @param hc_handle Where to store the HC handle
+ *	(can be NULL for existence test only).
+ * @return Error code.
+ */
+int usb_ddf_get_hc_handle_by_class(size_t class_index,
+    devman_handle_t *hc_handle)
+{
+	char *class_index_str;
+	devman_handle_t hc_handle_tmp;
+	int rc;
+
+	rc = asprintf(&class_index_str, "%zu", class_index);
+	if (rc < 0) {
+		return ENOMEM;
+	}
+	rc = devman_device_get_handle_by_class("usbhc", class_index_str,
+	    &hc_handle_tmp, 0);
+	free(class_index_str);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	if (hc_handle != NULL) {
+		*hc_handle = hc_handle_tmp;
+	}
+
+	return EOK;
+}
+
+/** Find host controller handle that is ancestor of given device.
+ *
+ * @param[in] device_handle Device devman handle.
+ * @param[out] hc_handle Where to store handle of host controller
+ *	controlling device with @p device_handle handle.
+ * @return Error code.
+ */
+int usb_hc_find(devman_handle_t device_handle, devman_handle_t *hc_handle)
+{
+	async_sess_t *parent_sess =
+	    devman_parent_device_connect(EXCHANGE_SERIALIZE, device_handle,
+	    IPC_FLAG_BLOCKING);
+	if (!parent_sess)
+		return ENOMEM;
+	
+	async_exch_t *exch = async_exchange_begin(parent_sess);
+	
+	devman_handle_t h;
+	int rc = async_req_1_1(exch, DEV_IFACE_ID(USB_DEV_IFACE),
+	    IPC_M_USB_GET_HOST_CONTROLLER_HANDLE, &h);
+	
+	async_exchange_end(exch);
+	async_hangup(parent_sess);
+	
+	if (rc != EOK)
+		return rc;
+	
+	if (hc_handle != NULL)
+		*hc_handle = h;
+	
+	return EOK;
+}
+
+/**
+ * @}
+ */
Index: uspace/lib/usb/src/resolve.c
===================================================================
--- uspace/lib/usb/src/resolve.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usb/src/resolve.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,244 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ *
+ */
+#include <inttypes.h>
+#include <usb/hc.h>
+#include <devman.h>
+#include <errno.h>
+#include <str.h>
+#include <stdio.h>
+
+#define MAX_DEVICE_PATH 1024
+
+static bool try_parse_bus_and_address(const char *path,
+    char **func_start,
+    devman_handle_t *out_hc_handle, usb_address_t *out_device_address)
+{
+	size_t class_index;
+	size_t address;
+	int rc;
+	char *ptr;
+
+	rc = str_size_t(path, &ptr, 10, false, &class_index);
+	if (rc != EOK) {
+		return false;
+	}
+	if ((*ptr == ':') || (*ptr == '.')) {
+		ptr++;
+	} else {
+		return false;
+	}
+	rc = str_size_t(ptr, func_start, 10, false, &address);
+	if (rc != EOK) {
+		return false;
+	}
+	rc = usb_ddf_get_hc_handle_by_class(class_index, out_hc_handle);
+	if (rc != EOK) {
+		return false;
+	}
+	if (out_device_address != NULL) {
+		*out_device_address = (usb_address_t) address;
+	}
+	return true;
+}
+
+static int get_device_handle_by_address(devman_handle_t hc_handle, int addr,
+    devman_handle_t *dev_handle)
+{
+	int rc;
+	usb_hc_connection_t conn;
+
+	usb_hc_connection_initialize(&conn, hc_handle);
+	rc = usb_hc_connection_open(&conn);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	rc = usb_hc_get_handle_by_address(&conn, addr, dev_handle);
+
+	usb_hc_connection_close(&conn);
+
+	return rc;
+}
+
+/** Resolve handle and address of USB device from its path.
+ *
+ * This is a wrapper working on best effort principle.
+ * If the resolving fails, if will not give much details about what
+ * is wrong.
+ * Typically, error from this function would be reported to the user
+ * as "bad device specification" or "device does not exist".
+ *
+ * The path can be specified in following format:
+ *  - devman path (e.g. /hw/pci0/.../usb01_a5
+ *  - bus number and device address (e.g. 5.1)
+ *  - bus number, device address and device function (e.g. 2.1/HID0/keyboard)
+ *
+ * @param[in] dev_path Path to the device.
+ * @param[out] out_hc_handle Where to store handle of a parent host controller.
+ * @param[out] out_dev_addr Where to store device (USB) address.
+ * @param[out] out_dev_handle Where to store device handle.
+ * @return Error code.
+ */
+int usb_resolve_device_handle(const char *dev_path, devman_handle_t *out_hc_handle,
+    usb_address_t *out_dev_addr, devman_handle_t *out_dev_handle)
+{
+	if (dev_path == NULL) {
+		return EBADMEM;
+	}
+
+	bool found_hc = false;
+	bool found_addr = false;
+	devman_handle_t hc_handle, dev_handle;
+	usb_address_t dev_addr = -1;
+	int rc;
+	bool is_bus_addr;
+	char *func_start = NULL;
+	char *path = NULL;
+
+	/* First try the BUS.ADDR format. */
+	is_bus_addr = try_parse_bus_and_address(dev_path, &func_start,
+	    &hc_handle, &dev_addr);
+	if (is_bus_addr) {
+		found_hc = true;
+		found_addr = true;
+		/*
+		 * Now get the handle of the device. We will need that
+		 * in both cases. If there is only BUS.ADDR, it will
+		 * be the handle to be returned to the caller, otherwise
+		 * we will need it to resolve the path to which the
+		 * suffix would be appended.
+		 */
+		/* If there is nothing behind the BUS.ADDR, we will
+		 * get the device handle from the host controller.
+		 * Otherwise, we will
+		 */
+		rc = get_device_handle_by_address(hc_handle, dev_addr,
+		    &dev_handle);
+		if (rc != EOK) {
+			return rc;
+		}
+		if (str_length(func_start) > 0) {
+			char tmp_path[MAX_DEVICE_PATH ];
+			rc = devman_get_device_path(dev_handle,
+			    tmp_path, MAX_DEVICE_PATH);
+			if (rc != EOK) {
+				return rc;
+			}
+			rc = asprintf(&path, "%s%s", tmp_path, func_start);
+			if (rc < 0) {
+				return ENOMEM;
+			}
+		} else {
+			/* Everything is resolved. Get out of here. */
+			goto copy_out;
+		}
+	} else {
+		path = str_dup(dev_path);
+		if (path == NULL) {
+			return ENOMEM;
+		}
+	}
+
+	/* First try to get the device handle. */
+	rc = devman_device_get_handle(path, &dev_handle, 0);
+	if (rc != EOK) {
+		free(path);
+		/* Invalid path altogether. */
+		return rc;
+	}
+
+	/* Remove suffixes and hope that we will encounter device node. */
+	while (str_length(path) > 0) {
+		/* Get device handle first. */
+		devman_handle_t tmp_handle;
+		rc = devman_device_get_handle(path, &tmp_handle, 0);
+		if (rc != EOK) {
+			free(path);
+			return rc;
+		}
+
+		/* Try to find its host controller. */
+		if (!found_hc) {
+			rc = usb_hc_find(tmp_handle, &hc_handle);
+			if (rc == EOK) {
+				found_hc = true;
+			}
+		}
+
+		/* Try to get its address. */
+		if (!found_addr) {
+			dev_addr = usb_hc_get_address_by_handle(tmp_handle);
+			if (dev_addr >= 0) {
+				found_addr = true;
+			}
+		}
+
+		/* Speed-up. */
+		if (found_hc && found_addr) {
+			break;
+		}
+
+		/* Remove the last suffix. */
+		char *slash_pos = str_rchr(path, '/');
+		if (slash_pos != NULL) {
+			*slash_pos = 0;
+		}
+	}
+
+	free(path);
+
+	if (!found_addr || !found_hc) {
+		return ENOENT;
+	}
+
+copy_out:
+	if (out_dev_addr != NULL) {
+		*out_dev_addr = dev_addr;
+	}
+	if (out_hc_handle != NULL) {
+		*out_hc_handle = hc_handle;
+	}
+	if (out_dev_handle != NULL) {
+		*out_dev_handle = dev_handle;
+	}
+
+	return EOK;
+}
+
+
+/**
+ * @}
+ */
+
Index: uspace/lib/usb/src/usb.c
===================================================================
--- uspace/lib/usb/src/usb.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usb/src/usb.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2010 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * Common USB functions.
+ */
+#include <usb/usb.h>
+#include <errno.h>
+
+#define ARR_SIZE(arr) (sizeof(arr)/sizeof(arr[0]))
+
+static const char *str_speed[] = {
+	"low",
+	"full",
+	"high"
+};
+
+static const char *str_transfer_type[] = {
+	"control",
+	"isochronous",
+	"bulk",
+	"interrupt"
+};
+
+static const char *str_transfer_type_short[] = {
+	"ctrl",
+	"iso",
+	"bulk",
+	"intr"
+};
+
+/** String representation for USB transfer type.
+ *
+ * @param t Transfer type.
+ * @return Transfer type as a string (in English).
+ */
+const char *usb_str_transfer_type(usb_transfer_type_t t)
+{
+	if (t >= ARR_SIZE(str_transfer_type)) {
+		return "invalid";
+	}
+	return str_transfer_type[t];
+}
+
+/** String representation for USB transfer type (short version).
+ *
+ * @param t Transfer type.
+ * @return Transfer type as a short string for debugging messages.
+ */
+const char *usb_str_transfer_type_short(usb_transfer_type_t t)
+{
+	if (t >= ARR_SIZE(str_transfer_type_short)) {
+		return "invl";
+	}
+	return str_transfer_type_short[t];
+}
+
+/** String representation of USB speed.
+ *
+ * @param s The speed.
+ * @return USB speed as a string (in English).
+ */
+const char *usb_str_speed(usb_speed_t s)
+{
+	if (s >= ARR_SIZE(str_speed)) {
+		return "invalid";
+	}
+	return str_speed[s];
+}
+
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/Makefile
===================================================================
--- uspace/lib/usbdev/Makefile	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/Makefile	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,50 @@
+#
+# Copyright (c) 2011 Vojtech Horky
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# - Redistributions of source code must retain the above copyright
+#   notice, this list of conditions and the following disclaimer.
+# - Redistributions in binary form must reproduce the above copyright
+#   notice, this list of conditions and the following disclaimer in the
+#   documentation and/or other materials provided with the distribution.
+# - The name of the author may not be used to endorse or promote products
+#   derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+USPACE_PREFIX = ../..
+LIBRARY = libusbdev
+EXTRA_CFLAGS += \
+	-I$(LIBUSB_PREFIX)/include \
+	-I$(LIBDRV_PREFIX)/include \
+	-Iinclude
+
+SOURCES = \
+	src/altiface.c \
+	src/devdrv.c \
+	src/devpoll.c \
+	src/dp.c \
+	src/hub.c \
+	src/pipepriv.c \
+	src/pipepriv.h \
+	src/pipes.c \
+	src/pipesinit.c \
+	src/pipesio.c \
+	src/recognise.c \
+	src/request.c
+
+include $(USPACE_PREFIX)/Makefile.common
Index: uspace/lib/usbdev/include/usb/dev/dp.h
===================================================================
--- uspace/lib/usbdev/include/usb/dev/dp.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/include/usb/dev/dp.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * USB descriptor parser.
+ */
+#ifndef LIBUSBDEV_DP_H_
+#define LIBUSBDEV_DP_H_
+
+#include <sys/types.h>
+#include <usb/usb.h>
+#include <usb/descriptor.h>
+
+/** USB descriptors nesting.
+ * The nesting describes the logical tree USB descriptors form
+ * (e.g. that endpoint descriptor belongs to interface or that
+ * interface belongs to configuration).
+ *
+ * See usb_descriptor_type_t for descriptor constants.
+ */
+typedef struct {
+	/** Child descriptor id. */
+	int child;
+	/** Parent descriptor id. */
+	int parent;
+} usb_dp_descriptor_nesting_t;
+
+extern usb_dp_descriptor_nesting_t usb_dp_standard_descriptor_nesting[];
+
+/** Descriptor parser structure. */
+typedef struct {
+	/** Used descriptor nesting. */
+	usb_dp_descriptor_nesting_t *nesting;
+} usb_dp_parser_t;
+
+/** Descriptor parser data. */
+typedef struct {
+	/** Data to be parsed. */
+	uint8_t *data;
+	/** Size of input data in bytes. */
+	size_t size;
+	/** Custom argument. */
+	void *arg;
+} usb_dp_parser_data_t;
+
+uint8_t *usb_dp_get_nested_descriptor(usb_dp_parser_t *,
+    usb_dp_parser_data_t *, uint8_t *);
+uint8_t *usb_dp_get_sibling_descriptor(usb_dp_parser_t *,
+    usb_dp_parser_data_t *, uint8_t *, uint8_t *);
+
+void usb_dp_walk_simple(uint8_t *, size_t, usb_dp_descriptor_nesting_t *,
+    void (*)(uint8_t *, size_t, void *), void *);
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/include/usb/dev/driver.h
===================================================================
--- uspace/lib/usbdev/include/usb/dev/driver.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/include/usb/dev/driver.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,179 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * USB device driver framework.
+ */
+#ifndef LIBUSBDEV_DRIVER_H_
+#define LIBUSBDEV_DRIVER_H_
+
+#include <usb/dev/pipes.h>
+
+/** Descriptors for USB device. */
+typedef struct {
+	/** Standard device descriptor. */
+	usb_standard_device_descriptor_t device;
+	/** Full configuration descriptor of current configuration. */
+	uint8_t *configuration;
+	size_t configuration_size;
+} usb_device_descriptors_t;
+
+/** Wrapper for data related to alternate interface setting.
+ * The pointers will typically point inside configuration descriptor and
+ * thus you shall not deallocate them.
+ */
+typedef struct {
+	/** Interface descriptor. */
+	usb_standard_interface_descriptor_t *interface;
+	/** Pointer to start of descriptor tree bound with this interface. */
+	uint8_t *nested_descriptors;
+	/** Size of data pointed by nested_descriptors in bytes. */
+	size_t nested_descriptors_size;
+} usb_alternate_interface_descriptors_t;
+
+/** Alternate interface settings. */
+typedef struct {
+	/** Array of alternate interfaces descriptions. */
+	usb_alternate_interface_descriptors_t *alternatives;
+	/** Size of @c alternatives array. */
+	size_t alternative_count;
+	/** Index of currently selected one. */
+	size_t current;
+} usb_alternate_interfaces_t;
+
+/** USB device structure. */
+typedef struct {
+	/** The default control pipe. */
+	usb_pipe_t ctrl_pipe;
+	/** Other endpoint pipes.
+	 * This is an array of other endpoint pipes in the same order as
+	 * in usb_driver_t.
+	 */
+	usb_endpoint_mapping_t *pipes;
+	/** Number of other endpoint pipes. */
+	size_t pipes_count;
+	/** Current interface.
+	 * Usually, drivers operate on single interface only.
+	 * This item contains the value of the interface or -1 for any.
+	 */
+	int interface_no;
+
+	/** Alternative interfaces.
+	 * Set to NULL when the driver controls whole device
+	 * (i.e. more (or any) interfaces).
+	 */
+	usb_alternate_interfaces_t *alternate_interfaces;
+
+	/** Some useful descriptors. */
+	usb_device_descriptors_t descriptors;
+
+	/** Generic DDF device backing this one. */
+	ddf_dev_t *ddf_dev;
+	/** Custom driver data.
+	 * Do not use the entry in generic device, that is already used
+	 * by the framework.
+	 */
+	void *driver_data;
+
+	/** Connection backing the pipes.
+	 * Typically, you will not need to use this attribute at all.
+	 */
+	usb_device_connection_t wire;
+} usb_device_t;
+
+/** USB driver ops. */
+typedef struct {
+	/** Callback when new device is about to be controlled by the driver. */
+	int (*add_device)(usb_device_t *);
+} usb_driver_ops_t;
+
+/** USB driver structure. */
+typedef struct {
+	/** Driver name.
+	 * This name is copied to the generic driver name and must be exactly
+	 * the same as the directory name where the driver executable resides.
+	 */
+	const char *name;
+	/** Expected endpoints description.
+	 * This description shall exclude default control endpoint (pipe zero)
+	 * and must be NULL terminated.
+	 * When only control endpoint is expected, you may set NULL directly
+	 * without creating one item array containing NULL.
+	 *
+	 * When the driver expect single interrupt in endpoint,
+	 * the initialization may look like this:
+\code
+static usb_endpoint_description_t poll_endpoint_description = {
+	.transfer_type = USB_TRANSFER_INTERRUPT,
+	.direction = USB_DIRECTION_IN,
+	.interface_class = USB_CLASS_HUB,
+	.interface_subclass = 0,
+	.interface_protocol = 0,
+	.flags = 0
+};
+
+static usb_endpoint_description_t *hub_endpoints[] = {
+	&poll_endpoint_description,
+	NULL
+};
+
+static usb_driver_t hub_driver = {
+	.endpoints = hub_endpoints,
+	...
+};
+\endcode
+	 */
+	usb_endpoint_description_t **endpoints;
+	/** Driver ops. */
+	usb_driver_ops_t *ops;
+} usb_driver_t;
+
+int usb_driver_main(usb_driver_t *);
+
+int usb_device_select_interface(usb_device_t *, uint8_t,
+    usb_endpoint_description_t **);
+
+int usb_device_retrieve_descriptors(usb_pipe_t *, usb_device_descriptors_t *);
+int usb_device_create_pipes(ddf_dev_t *, usb_device_connection_t *,
+    usb_endpoint_description_t **, uint8_t *, size_t, int, int,
+    usb_endpoint_mapping_t **, size_t *);
+int usb_device_destroy_pipes(ddf_dev_t *, usb_endpoint_mapping_t *, size_t);
+int usb_device_create(ddf_dev_t *, usb_endpoint_description_t **, usb_device_t **, const char **);
+void usb_device_destroy(usb_device_t *);
+
+size_t usb_interface_count_alternates(uint8_t *, size_t, uint8_t);
+int usb_alternate_interfaces_create(uint8_t *, size_t, int,
+    usb_alternate_interfaces_t **);
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/include/usb/dev/hub.h
===================================================================
--- uspace/lib/usbdev/include/usb/dev/hub.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/include/usb/dev/hub.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * Functions needed by hub drivers.
+ *
+ * For class specific requests, see usb/classes/hub.h.
+ */
+#ifndef LIBUSBDEV_HUB_H_
+#define LIBUSBDEV_HUB_H_
+
+#include <sys/types.h>
+#include <usb/hc.h>
+
+int usb_hc_new_device_wrapper(ddf_dev_t *, usb_hc_connection_t *, usb_speed_t,
+    int (*)(int, void *), int, void *,
+    usb_address_t *, devman_handle_t *,
+    ddf_dev_ops_t *, void *, ddf_fun_t **);
+
+/** Info about device attached to host controller.
+ *
+ * This structure exists only to keep the same signature of
+ * usb_hc_register_device() when more properties of the device
+ * would have to be passed to the host controller.
+ */
+typedef struct {
+	/** Device address. */
+	usb_address_t address;
+	/** Devman handle of the device. */
+	devman_handle_t handle;
+} usb_hc_attached_device_t;
+
+usb_address_t usb_hc_request_address(usb_hc_connection_t *, usb_speed_t);
+int usb_hc_register_device(usb_hc_connection_t *,
+    const usb_hc_attached_device_t *);
+int usb_hc_unregister_device(usb_hc_connection_t *, usb_address_t);
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/include/usb/dev/pipes.h
===================================================================
--- uspace/lib/usbdev/include/usb/dev/pipes.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/include/usb/dev/pipes.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,193 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * USB pipes representation.
+ */
+#ifndef LIBUSBDEV_PIPES_H_
+#define LIBUSBDEV_PIPES_H_
+
+#include <sys/types.h>
+#include <usb/usb.h>
+#include <usb/hc.h>
+#include <usb/descriptor.h>
+#include <ipc/devman.h>
+#include <ddf/driver.h>
+#include <fibril_synch.h>
+#include <async.h>
+
+/** Abstraction of a physical connection to the device.
+ * This type is an abstraction of the USB wire that connects the host and
+ * the function (device).
+ */
+typedef struct {
+	/** Handle of the host controller device is connected to. */
+	devman_handle_t hc_handle;
+	/** Address of the device. */
+	usb_address_t address;
+} usb_device_connection_t;
+
+/** Abstraction of a logical connection to USB device endpoint.
+ * It encapsulates endpoint attributes (transfer type etc.) as well
+ * as information about currently running sessions.
+ * This endpoint must be bound with existing usb_device_connection_t
+ * (i.e. the wire to send data over).
+ *
+ * Locking order: if you want to lock both mutexes
+ * (@c guard and @c hc_sess_mutex), lock @c guard first.
+ * It is not necessary to lock @c guard if you want to lock @c hc_sess_mutex
+ * only.
+ */
+typedef struct {
+	/** Guard of the whole pipe. */
+	fibril_mutex_t guard;
+
+	/** The connection used for sending the data. */
+	usb_device_connection_t *wire;
+
+	/** Endpoint number. */
+	usb_endpoint_t endpoint_no;
+
+	/** Endpoint transfer type. */
+	usb_transfer_type_t transfer_type;
+
+	/** Endpoint direction. */
+	usb_direction_t direction;
+
+	/** Maximum packet size for the endpoint. */
+	size_t max_packet_size;
+
+	/** Session to the host controller.
+	 * NULL when no session is active.
+	 * It is an error to access this member without @c hc_sess_mutex
+	 * being locked.
+	 * If call over the phone is to be made, it must be preceeded by
+	 * call to pipe_add_ref() [internal libusb function].
+	 */
+	async_sess_t *hc_sess;
+
+	/** Guard for serialization of requests over the session. */
+	fibril_mutex_t hc_sess_mutex;
+
+	/** Number of active transfers over the pipe. */
+	int refcount;
+	/** Number of failed attempts to open the HC phone.
+	 * When user requests usb_pipe_start_long_transfer() and the operation
+	 * fails, there is no way to report this to the user.
+	 * That the soft reference counter is increased to record the attempt.
+	 * When the user then request e.g. usb_pipe_read(), it will try to
+	 * add reference as well.
+	 * If that fails, it is reported to the user. If it is okay, the
+	 * real reference counter is incremented.
+	 * The problem might arise when ending the long transfer (since
+	 * the number of references would be only 1, but logically it shall be
+	 * two).
+	 * Decrementing the soft counter first shall solve this.
+	 */
+	int refcount_soft;
+
+	/** Whether to automatically reset halt on the endpoint.
+	 * Valid only for control endpoint zero.
+	 */
+	bool auto_reset_halt;
+} usb_pipe_t;
+
+
+/** Description of endpoint characteristics. */
+typedef struct {
+	/** Transfer type (e.g. control or interrupt). */
+	usb_transfer_type_t transfer_type;
+	/** Transfer direction (to or from a device). */
+	usb_direction_t direction;
+	/** Interface class this endpoint belongs to (-1 for any). */
+	int interface_class;
+	/** Interface subclass this endpoint belongs to (-1 for any). */
+	int interface_subclass;
+	/** Interface protocol this endpoint belongs to (-1 for any). */
+	int interface_protocol;
+	/** Extra endpoint flags. */
+	unsigned int flags;
+} usb_endpoint_description_t;
+
+/** Mapping of endpoint pipes and endpoint descriptions. */
+typedef struct {
+	/** Endpoint pipe. */
+	usb_pipe_t *pipe;
+	/** Endpoint description. */
+	const usb_endpoint_description_t *description;
+	/** Interface number the endpoint must belong to (-1 for any). */
+	int interface_no;
+	/** Alternate interface setting to choose. */
+	int interface_setting;
+	/** Found descriptor fitting the description. */
+	usb_standard_endpoint_descriptor_t *descriptor;
+	/** Interface descriptor the endpoint belongs to. */
+	usb_standard_interface_descriptor_t *interface;
+	/** Whether the endpoint was actually found. */
+	bool present;
+} usb_endpoint_mapping_t;
+
+int usb_device_connection_initialize_on_default_address(
+    usb_device_connection_t *, usb_hc_connection_t *);
+int usb_device_connection_initialize_from_device(usb_device_connection_t *,
+    ddf_dev_t *);
+int usb_device_connection_initialize(usb_device_connection_t *,
+    devman_handle_t, usb_address_t);
+
+int usb_device_get_assigned_interface(ddf_dev_t *);
+
+int usb_pipe_initialize(usb_pipe_t *, usb_device_connection_t *,
+    usb_endpoint_t, usb_transfer_type_t, size_t, usb_direction_t);
+int usb_pipe_initialize_default_control(usb_pipe_t *,
+    usb_device_connection_t *);
+int usb_pipe_probe_default_control(usb_pipe_t *);
+int usb_pipe_initialize_from_configuration(usb_endpoint_mapping_t *,
+    size_t, uint8_t *, size_t, usb_device_connection_t *);
+int usb_pipe_register_with_speed(usb_pipe_t *, usb_speed_t,
+    unsigned int, usb_hc_connection_t *);
+int usb_pipe_register(usb_pipe_t *, unsigned int, usb_hc_connection_t *);
+int usb_pipe_unregister(usb_pipe_t *, usb_hc_connection_t *);
+
+void usb_pipe_start_long_transfer(usb_pipe_t *);
+void usb_pipe_end_long_transfer(usb_pipe_t *);
+
+int usb_pipe_read(usb_pipe_t *, void *, size_t, size_t *);
+int usb_pipe_write(usb_pipe_t *, void *, size_t);
+
+int usb_pipe_control_read(usb_pipe_t *, void *, size_t,
+    void *, size_t, size_t *);
+int usb_pipe_control_write(usb_pipe_t *, void *, size_t,
+    void *, size_t);
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/include/usb/dev/poll.h
===================================================================
--- uspace/lib/usbdev/include/usb/dev/poll.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/include/usb/dev/poll.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * USB device polling functions.
+ */
+#ifndef LIBUSBDEV_POLL_H_
+#define LIBUSBDEV_POLL_H_
+
+#include <usb/dev/driver.h>
+#include <time.h>
+
+typedef struct {
+	/** Level of debugging messages from auto polling.
+	 * 0 - nothing
+	 * 1 - inform about errors and polling start/end
+	 * 2 - also dump every retrieved buffer
+	 */
+	int debug;
+	/** Maximum number of consecutive errors before polling termination. */
+	size_t max_failures;
+	/** Delay between poll requests in milliseconds.
+	 * Set to negative value to use value from endpoint descriptor.
+	 */
+	int delay;
+	/** Whether to automatically try to clear the HALT feature after
+	 * the endpoint stalls.
+	 */
+	bool auto_clear_halt;
+	/** Callback when data arrives.
+	 *
+	 * @param dev Device that was polled.
+	 * @param data Data buffer (in USB endianness).
+	 * @param data_size Size of the @p data buffer in bytes.
+	 * @param arg Custom argument.
+	 * @return Whether to continue in polling.
+	 */
+	bool (*on_data)(usb_device_t *dev, uint8_t *data, size_t data_size,
+	    void *arg);
+	/** Callback when polling is terminated.
+	 *
+	 * @param dev Device where the polling was terminated.
+	 * @param due_to_errors Whether polling stopped due to several failures.
+	 * @param arg Custom argument.
+	 */
+	void (*on_polling_end)(usb_device_t *dev, bool due_to_errors,
+	    void *arg);
+	/** Callback when error occurs.
+	 *
+	 * @param dev Device where error occurred.
+	 * @param err_code Error code (as returned from usb_pipe_read).
+	 * @param arg Custom argument.
+	 * @return Whether to continue in polling.
+	 */
+	bool (*on_error)(usb_device_t *dev, int err_code, void *arg);
+} usb_device_auto_polling_t;
+
+int usb_device_auto_polling(usb_device_t *, size_t, usb_device_auto_polling_t *,
+    size_t, void *);
+
+typedef bool (*usb_polling_callback_t)(usb_device_t *,
+    uint8_t *, size_t, void *);
+typedef void (*usb_polling_terminted_callback_t)(usb_device_t *, bool, void *);
+
+int usb_device_auto_poll(usb_device_t *, size_t,
+    usb_polling_callback_t, size_t, usb_polling_terminted_callback_t, void *);
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/include/usb/dev/recognise.h
===================================================================
--- uspace/lib/usbdev/include/usb/dev/recognise.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/include/usb/dev/recognise.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * USB device recognition.
+ */
+#ifndef LIBUSBDEV_RECOGNISE_H_
+#define LIBUSBDEV_RECOGNISE_H_
+
+#include <sys/types.h>
+#include <usb/usb.h>
+#include <usb/dev/pipes.h>
+#include <ipc/devman.h>
+
+int usb_device_create_match_ids_from_device_descriptor(
+    const usb_standard_device_descriptor_t *, match_id_list_t *);
+
+int usb_device_create_match_ids_from_interface(
+    const usb_standard_device_descriptor_t *,
+    const usb_standard_interface_descriptor_t *, match_id_list_t *);
+
+int usb_device_create_match_ids(usb_pipe_t *, match_id_list_t *);
+
+int usb_device_register_child_in_devman(usb_address_t, devman_handle_t,
+    ddf_dev_t *, devman_handle_t *, ddf_dev_ops_t *, void *, ddf_fun_t **);
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/include/usb/dev/request.h
===================================================================
--- uspace/lib/usbdev/include/usb/dev/request.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/include/usb/dev/request.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,150 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * Standard USB requests.
+ */
+#ifndef LIBUSBDEV_REQUEST_H_
+#define LIBUSBDEV_REQUEST_H_
+
+#include <sys/types.h>
+#include <l18n/langs.h>
+#include <usb/usb.h>
+#include <usb/dev/pipes.h>
+#include <usb/descriptor.h>
+
+/** USB device status - device is self powered (opposed to bus powered). */
+#define USB_DEVICE_STATUS_SELF_POWERED ((uint16_t)(1 << 0))
+
+/** USB device status - remote wake-up signaling is enabled. */
+#define USB_DEVICE_STATUS_REMOTE_WAKEUP ((uint16_t)(1 << 1))
+
+/** USB endpoint status - endpoint is halted (stalled). */
+#define USB_ENDPOINT_STATUS_HALTED ((uint16_t)(1 << 0))
+
+/** USB feature selector - endpoint halt (stall). */
+#define USB_FEATURE_SELECTOR_ENDPOINT_HALT (0)
+
+/** USB feature selector - device remote wake-up. */
+#define USB_FEATURE_SELECTOR_REMOTE_WAKEUP (1)
+
+/** Standard device request. */
+typedef enum {
+	USB_DEVREQ_GET_STATUS = 0,
+	USB_DEVREQ_CLEAR_FEATURE = 1,
+	USB_DEVREQ_SET_FEATURE = 3,
+	USB_DEVREQ_SET_ADDRESS = 5,
+	USB_DEVREQ_GET_DESCRIPTOR = 6,
+	USB_DEVREQ_SET_DESCRIPTOR = 7,
+	USB_DEVREQ_GET_CONFIGURATION = 8,
+	USB_DEVREQ_SET_CONFIGURATION = 9,
+	USB_DEVREQ_GET_INTERFACE = 10,
+	USB_DEVREQ_SET_INTERFACE = 11,
+	USB_DEVREQ_SYNCH_FRAME = 12,
+	USB_DEVREQ_LAST_STD
+} usb_stddevreq_t;
+
+/** Device request setup packet.
+ * The setup packet describes the request.
+ */
+typedef struct {
+	/** Request type.
+	 * The type combines transfer direction, request type and
+	 * intended recipient.
+	 */
+	uint8_t request_type;
+	/** Request identification. */
+	uint8_t request;
+	/** Main parameter to the request. */
+	union {
+		uint16_t value;
+		/* FIXME: add #ifdefs according to host endianness */
+		struct {
+			uint8_t value_low;
+			uint8_t value_high;
+		};
+	};
+	/** Auxiliary parameter to the request.
+	 * Typically, it is offset to something.
+	 */
+	uint16_t index;
+	/** Length of extra data. */
+	uint16_t length;
+} __attribute__ ((packed)) usb_device_request_setup_packet_t;
+
+int usb_control_request_set(usb_pipe_t *,
+    usb_request_type_t, usb_request_recipient_t, uint8_t,
+    uint16_t, uint16_t, void *, size_t);
+
+int usb_control_request_get(usb_pipe_t *,
+    usb_request_type_t, usb_request_recipient_t, uint8_t,
+    uint16_t, uint16_t, void *, size_t, size_t *);
+
+int usb_request_get_status(usb_pipe_t *, usb_request_recipient_t,
+    uint16_t, uint16_t *);
+int usb_request_clear_feature(usb_pipe_t *, usb_request_type_t,
+    usb_request_recipient_t, uint16_t, uint16_t);
+int usb_request_set_feature(usb_pipe_t *, usb_request_type_t,
+    usb_request_recipient_t, uint16_t, uint16_t);
+int usb_request_set_address(usb_pipe_t *, usb_address_t);
+int usb_request_get_descriptor(usb_pipe_t *, usb_request_type_t,
+    usb_request_recipient_t, uint8_t, uint8_t, uint16_t, void *, size_t, 
+    size_t *);
+int usb_request_get_descriptor_alloc(usb_pipe_t *, usb_request_type_t,
+    usb_request_recipient_t, uint8_t, uint8_t, uint16_t, void **, size_t *);
+int usb_request_get_device_descriptor(usb_pipe_t *,
+    usb_standard_device_descriptor_t *);
+int usb_request_get_bare_configuration_descriptor(usb_pipe_t *, int,
+    usb_standard_configuration_descriptor_t *);
+int usb_request_get_full_configuration_descriptor(usb_pipe_t *, int,
+    void *, size_t, size_t *);
+int usb_request_get_full_configuration_descriptor_alloc(usb_pipe_t *,
+    int, void **, size_t *);
+int usb_request_set_descriptor(usb_pipe_t *, usb_request_type_t,
+    usb_request_recipient_t, uint8_t, uint8_t, uint16_t, void *, size_t);
+int usb_request_get_configuration(usb_pipe_t *, uint8_t *);
+int usb_request_set_configuration(usb_pipe_t *, uint8_t);
+int usb_request_get_interface(usb_pipe_t *, uint8_t, uint8_t *);
+int usb_request_set_interface(usb_pipe_t *, uint8_t, uint8_t);
+
+int usb_request_get_supported_languages(usb_pipe_t *,
+    l18_win_locales_t **, size_t *);
+int usb_request_get_string(usb_pipe_t *, size_t, l18_win_locales_t,
+    char **);
+
+int usb_request_clear_endpoint_halt(usb_pipe_t *, uint16_t);
+int usb_pipe_clear_halt(usb_pipe_t *, usb_pipe_t *);
+int usb_request_get_endpoint_status(usb_pipe_t *, usb_pipe_t *, uint16_t *);
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/src/altiface.c
===================================================================
--- uspace/lib/usbdev/src/altiface.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/src/altiface.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,181 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * Handling alternate interface settings.
+ */
+#include <usb/dev/driver.h>
+#include <usb/dev/request.h>
+#include <usb/debug.h>
+#include <usb/dev/dp.h>
+#include <errno.h>
+#include <str_error.h>
+#include <assert.h>
+
+/** Count number of alternate settings of a interface.
+ *
+ * @param config_descr Full configuration descriptor.
+ * @param config_descr_size Size of @p config_descr in bytes.
+ * @param interface_no Interface number.
+ * @return Number of alternate interfaces for @p interface_no interface.
+ */
+size_t usb_interface_count_alternates(uint8_t *config_descr,
+    size_t config_descr_size, uint8_t interface_no)
+{
+	assert(config_descr != NULL);
+	assert(config_descr_size > 0);
+
+	usb_dp_parser_t dp_parser = {
+		.nesting = usb_dp_standard_descriptor_nesting
+	};
+	usb_dp_parser_data_t dp_data = {
+		.data = config_descr,
+		.size = config_descr_size,
+		.arg = NULL
+	};
+
+	size_t alternate_count = 0;
+
+	uint8_t *iface_ptr = usb_dp_get_nested_descriptor(&dp_parser,
+	    &dp_data, config_descr);
+	while (iface_ptr != NULL) {
+		usb_standard_interface_descriptor_t *iface
+		    = (usb_standard_interface_descriptor_t *) iface_ptr;
+		if (iface->descriptor_type == USB_DESCTYPE_INTERFACE) {
+			if (iface->interface_number == interface_no) {
+				alternate_count++;
+			}
+		}
+		iface_ptr = usb_dp_get_sibling_descriptor(&dp_parser, &dp_data,
+		    config_descr, iface_ptr);
+	}
+
+	return alternate_count;
+}
+
+/** Create alternate interface representation structure.
+ *
+ * @param[in] config_descr Configuration descriptor.
+ * @param[in] config_descr_size Size of configuration descriptor.
+ * @param[in] interface_number Interface number.
+ * @param[out] alternates_ptr Where to store pointer to allocated structure.
+ * @return Error code.
+ */
+int usb_alternate_interfaces_create(uint8_t *config_descr,
+    size_t config_descr_size, int interface_number,
+    usb_alternate_interfaces_t **alternates_ptr)
+{
+	assert(alternates_ptr != NULL);
+	assert(config_descr != NULL);
+	assert(config_descr_size > 0);
+
+	if (interface_number < 0) {
+		alternates_ptr = NULL;
+		return EOK;
+	}
+
+	usb_alternate_interfaces_t *alternates
+	    = malloc(sizeof(usb_alternate_interfaces_t));
+
+	if (alternates == NULL) {
+		return ENOMEM;
+	}
+
+	alternates->alternative_count
+	    = usb_interface_count_alternates(config_descr, config_descr_size,
+	    interface_number);
+
+	if (alternates->alternative_count == 0) {
+		free(alternates);
+		return ENOENT;
+	}
+
+	alternates->alternatives = malloc(alternates->alternative_count
+	    * sizeof(usb_alternate_interface_descriptors_t));
+	if (alternates->alternatives == NULL) {
+		free(alternates);
+		return ENOMEM;
+	}
+
+	alternates->current = 0;
+
+	usb_dp_parser_t dp_parser = {
+		.nesting = usb_dp_standard_descriptor_nesting
+	};
+	usb_dp_parser_data_t dp_data = {
+		.data = config_descr,
+		.size = config_descr_size,
+		.arg = NULL
+	};
+
+	usb_alternate_interface_descriptors_t *cur_alt_iface
+	    = &alternates->alternatives[0];
+
+	uint8_t *iface_ptr = usb_dp_get_nested_descriptor(&dp_parser,
+	    &dp_data, dp_data.data);
+	while (iface_ptr != NULL) {
+		usb_standard_interface_descriptor_t *iface
+		    = (usb_standard_interface_descriptor_t *) iface_ptr;
+		if ((iface->descriptor_type != USB_DESCTYPE_INTERFACE)
+		    || (iface->interface_number != interface_number)) {
+			iface_ptr = usb_dp_get_sibling_descriptor(&dp_parser,
+			    &dp_data,
+			    dp_data.data, iface_ptr);
+			continue;
+		}
+
+		cur_alt_iface->interface = iface;
+		cur_alt_iface->nested_descriptors = iface_ptr + sizeof(*iface);
+
+		/* Find next interface to count size of nested descriptors. */
+		iface_ptr = usb_dp_get_sibling_descriptor(&dp_parser, &dp_data,
+		    dp_data.data, iface_ptr);
+		if (iface_ptr == NULL) {
+			uint8_t *next = dp_data.data + dp_data.size;
+			cur_alt_iface->nested_descriptors_size
+			    = next - cur_alt_iface->nested_descriptors;
+		} else {
+			cur_alt_iface->nested_descriptors_size
+			    = iface_ptr - cur_alt_iface->nested_descriptors;
+		}
+
+		cur_alt_iface++;
+	}
+
+	*alternates_ptr = alternates;
+
+	return EOK;
+}
+
+
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/src/devdrv.c
===================================================================
--- uspace/lib/usbdev/src/devdrv.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/src/devdrv.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,563 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * USB device driver framework.
+ */
+#include <usb/dev/driver.h>
+#include <usb/dev/request.h>
+#include <usb/debug.h>
+#include <usb/dev/dp.h>
+#include <errno.h>
+#include <str_error.h>
+#include <assert.h>
+
+static int generic_add_device(ddf_dev_t *);
+
+static driver_ops_t generic_driver_ops = {
+	.add_device = generic_add_device
+};
+static driver_t generic_driver = {
+	.driver_ops = &generic_driver_ops
+};
+
+static usb_driver_t *driver = NULL;
+
+
+/** Main routine of USB device driver.
+ *
+ * Under normal conditions, this function never returns.
+ *
+ * @param drv USB device driver structure.
+ * @return Task exit status.
+ */
+int usb_driver_main(usb_driver_t *drv)
+{
+	assert(drv != NULL);
+
+	/* Prepare the generic driver. */
+	generic_driver.name = drv->name;
+
+	driver = drv;
+
+	return ddf_driver_main(&generic_driver);
+}
+
+/** Count number of pipes the driver expects.
+ *
+ * @param drv USB driver.
+ * @return Number of pipes (excluding default control pipe).
+ */
+static size_t count_other_pipes(usb_endpoint_description_t **endpoints)
+{
+	size_t count = 0;
+	if (endpoints == NULL) {
+		return 0;
+	}
+
+	while (endpoints[count] != NULL) {
+		count++;
+	}
+
+	return count;
+}
+
+/** Initialize endpoint pipes, excluding default control one.
+ *
+ * @param drv The device driver.
+ * @param dev Device to be initialized.
+ * @return Error code.
+ */
+static int initialize_other_pipes(usb_endpoint_description_t **endpoints,
+    usb_device_t *dev, int alternate_setting)
+{
+	if (endpoints == NULL) {
+		dev->pipes = NULL;
+		dev->pipes_count = 0;
+		return EOK;
+	}
+
+	usb_endpoint_mapping_t *pipes;
+	size_t pipes_count;
+
+	int rc = usb_device_create_pipes(dev->ddf_dev, &dev->wire, endpoints,
+	    dev->descriptors.configuration, dev->descriptors.configuration_size,
+	    dev->interface_no, alternate_setting,
+	    &pipes, &pipes_count);
+
+	if (rc != EOK) {
+		return rc;
+	}
+
+	dev->pipes = pipes;
+	dev->pipes_count = pipes_count;
+
+	return EOK;
+}
+
+/** Callback when new device is supposed to be controlled by this driver.
+ *
+ * This callback is a wrapper for USB specific version of @c add_device.
+ *
+ * @param gen_dev Device structure as prepared by DDF.
+ * @return Error code.
+ */
+int generic_add_device(ddf_dev_t *gen_dev)
+{
+	assert(driver);
+	assert(driver->ops);
+	assert(driver->ops->add_device);
+
+	int rc;
+
+	usb_device_t *dev = NULL;
+	const char *err_msg = NULL;
+	rc = usb_device_create(gen_dev, driver->endpoints, &dev, &err_msg);
+	if (rc != EOK) {
+		usb_log_error("USB device `%s' creation failed (%s): %s.\n",
+		    gen_dev->name, err_msg, str_error(rc));
+		return rc;
+	}
+
+	return driver->ops->add_device(dev);
+}
+
+/** Destroy existing pipes of a USB device.
+ *
+ * @param dev Device where to destroy the pipes.
+ * @return Error code.
+ */
+static int destroy_current_pipes(usb_device_t *dev)
+{
+	int rc = usb_device_destroy_pipes(dev->ddf_dev,
+	    dev->pipes, dev->pipes_count);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	dev->pipes = NULL;
+	dev->pipes_count = 0;
+
+	return EOK;
+}
+
+/** Change interface setting of a device.
+ * This function selects new alternate setting of an interface by issuing
+ * proper USB command to the device and also creates new USB pipes
+ * under @c dev->pipes.
+ *
+ * @warning This function is intended for drivers working at interface level.
+ * For drivers controlling the whole device, you need to change interface
+ * manually using usb_request_set_interface() and creating new pipes
+ * with usb_pipe_initialize_from_configuration().
+ *
+ * @warning This is a wrapper function that does several operations that
+ * can fail and that cannot be rollbacked easily. That means that a failure
+ * during the SET_INTERFACE request would result in having a device with
+ * no pipes at all (except the default control one). That is because the old
+ * pipes needs to be unregistered at HC first and the new ones could not
+ * be created.
+ *
+ * @param dev USB device.
+ * @param alternate_setting Alternate setting to choose.
+ * @param endpoints New endpoint descriptions.
+ * @return Error code.
+ */
+int usb_device_select_interface(usb_device_t *dev, uint8_t alternate_setting,
+    usb_endpoint_description_t **endpoints)
+{
+	if (dev->interface_no < 0) {
+		return EINVAL;
+	}
+
+	int rc;
+
+	/* Destroy existing pipes. */
+	rc = destroy_current_pipes(dev);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	/* Change the interface itself. */
+	rc = usb_request_set_interface(&dev->ctrl_pipe, dev->interface_no,
+	    alternate_setting);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	/* Create new pipes. */
+	rc = initialize_other_pipes(endpoints, dev, (int) alternate_setting);
+
+	return rc;
+}
+
+/** Retrieve basic descriptors from the device.
+ *
+ * @param[in] ctrl_pipe Control endpoint pipe.
+ * @param[out] descriptors Where to store the descriptors.
+ * @return Error code.
+ */
+int usb_device_retrieve_descriptors(usb_pipe_t *ctrl_pipe,
+    usb_device_descriptors_t *descriptors)
+{
+	assert(descriptors != NULL);
+
+	descriptors->configuration = NULL;
+
+	int rc;
+
+	/* It is worth to start a long transfer. */
+	usb_pipe_start_long_transfer(ctrl_pipe);
+
+	/* Get the device descriptor. */
+	rc = usb_request_get_device_descriptor(ctrl_pipe, &descriptors->device);
+	if (rc != EOK) {
+		goto leave;
+	}
+
+	/* Get the full configuration descriptor. */
+	rc = usb_request_get_full_configuration_descriptor_alloc(
+	    ctrl_pipe, 0, (void **) &descriptors->configuration,
+	    &descriptors->configuration_size);
+
+leave:
+	usb_pipe_end_long_transfer(ctrl_pipe);
+
+	return rc;
+}
+
+/** Create pipes for a device.
+ *
+ * This is more or less a wrapper that does following actions:
+ * - allocate and initialize pipes
+ * - map endpoints to the pipes based on the descriptions
+ * - registers endpoints with the host controller
+ *
+ * @param[in] dev Generic DDF device backing the USB one.
+ * @param[in] wire Initialized backing connection to the host controller.
+ * @param[in] endpoints Endpoints description, NULL terminated.
+ * @param[in] config_descr Configuration descriptor of active configuration.
+ * @param[in] config_descr_size Size of @p config_descr in bytes.
+ * @param[in] interface_no Interface to map from.
+ * @param[in] interface_setting Interface setting (default is usually 0).
+ * @param[out] pipes_ptr Where to store array of created pipes
+ *	(not NULL terminated).
+ * @param[out] pipes_count_ptr Where to store number of pipes
+ *	(set to if you wish to ignore the count).
+ * @return Error code.
+ */
+int usb_device_create_pipes(ddf_dev_t *dev, usb_device_connection_t *wire,
+    usb_endpoint_description_t **endpoints,
+    uint8_t *config_descr, size_t config_descr_size,
+    int interface_no, int interface_setting,
+    usb_endpoint_mapping_t **pipes_ptr, size_t *pipes_count_ptr)
+{
+	assert(dev != NULL);
+	assert(wire != NULL);
+	assert(endpoints != NULL);
+	assert(config_descr != NULL);
+	assert(config_descr_size > 0);
+	assert(pipes_ptr != NULL);
+
+	size_t i;
+	int rc;
+
+	size_t pipe_count = count_other_pipes(endpoints);
+	if (pipe_count == 0) {
+		*pipes_ptr = NULL;
+		return EOK;
+	}
+
+	usb_endpoint_mapping_t *pipes
+	    = malloc(sizeof(usb_endpoint_mapping_t) * pipe_count);
+	if (pipes == NULL) {
+		return ENOMEM;
+	}
+
+	/* Initialize to NULL to allow smooth rollback. */
+	for (i = 0; i < pipe_count; i++) {
+		pipes[i].pipe = NULL;
+	}
+
+	/* Now allocate and fully initialize. */
+	for (i = 0; i < pipe_count; i++) {
+		pipes[i].pipe = malloc(sizeof(usb_pipe_t));
+		if (pipes[i].pipe == NULL) {
+			rc = ENOMEM;
+			goto rollback_free_only;
+		}
+		pipes[i].description = endpoints[i];
+		pipes[i].interface_no = interface_no;
+		pipes[i].interface_setting = interface_setting;
+	}
+
+	/* Find the mapping from configuration descriptor. */
+	rc = usb_pipe_initialize_from_configuration(pipes, pipe_count,
+	    config_descr, config_descr_size, wire);
+	if (rc != EOK) {
+		goto rollback_free_only;
+	}
+
+	/* Register the endpoints with HC. */
+	usb_hc_connection_t hc_conn;
+	rc = usb_hc_connection_initialize_from_device(&hc_conn, dev);
+	if (rc != EOK) {
+		goto rollback_free_only;
+	}
+
+	rc = usb_hc_connection_open(&hc_conn);
+	if (rc != EOK) {
+		goto rollback_free_only;
+	}
+
+	for (i = 0; i < pipe_count; i++) {
+		if (pipes[i].present) {
+			rc = usb_pipe_register(pipes[i].pipe,
+			    pipes[i].descriptor->poll_interval, &hc_conn);
+			if (rc != EOK) {
+				goto rollback_unregister_endpoints;
+			}
+		}
+	}
+
+	usb_hc_connection_close(&hc_conn);
+
+	*pipes_ptr = pipes;
+	if (pipes_count_ptr != NULL) {
+		*pipes_count_ptr = pipe_count;
+	}
+
+	return EOK;
+
+	/*
+	 * Jump here if something went wrong after endpoints have
+	 * been registered.
+	 * This is also the target when the registration of
+	 * endpoints fails.
+	 */
+rollback_unregister_endpoints:
+	for (i = 0; i < pipe_count; i++) {
+		if (pipes[i].present) {
+			usb_pipe_unregister(pipes[i].pipe, &hc_conn);
+		}
+	}
+
+	usb_hc_connection_close(&hc_conn);
+
+	/*
+	 * Jump here if something went wrong before some actual communication
+	 * with HC. Then the only thing that needs to be done is to free
+	 * allocated memory.
+	 */
+rollback_free_only:
+	for (i = 0; i < pipe_count; i++) {
+		if (pipes[i].pipe != NULL) {
+			free(pipes[i].pipe);
+		}
+	}
+	free(pipes);
+
+	return rc;
+}
+
+/** Destroy pipes previously created by usb_device_create_pipes.
+ *
+ * @param[in] dev Generic DDF device backing the USB one.
+ * @param[in] pipes Endpoint mapping to be destroyed.
+ * @param[in] pipes_count Number of endpoints.
+ */
+int usb_device_destroy_pipes(ddf_dev_t *dev,
+    usb_endpoint_mapping_t *pipes, size_t pipes_count)
+{
+	assert(dev != NULL);
+	assert(((pipes != NULL) && (pipes_count > 0))
+	    || ((pipes == NULL) && (pipes_count == 0)));
+
+	if (pipes_count == 0) {
+		return EOK;
+	}
+
+	int rc;
+
+	/* Prepare connection to HC to allow endpoint unregistering. */
+	usb_hc_connection_t hc_conn;
+	rc = usb_hc_connection_initialize_from_device(&hc_conn, dev);
+	if (rc != EOK) {
+		return rc;
+	}
+	rc = usb_hc_connection_open(&hc_conn);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	/* Destroy the pipes. */
+	size_t i;
+	for (i = 0; i < pipes_count; i++) {
+		usb_pipe_unregister(pipes[i].pipe, &hc_conn);
+		free(pipes[i].pipe);
+	}
+
+	usb_hc_connection_close(&hc_conn);
+
+	free(pipes);
+
+	return EOK;
+}
+
+/** Initialize control pipe in a device.
+ *
+ * @param dev USB device in question.
+ * @param errmsg Where to store error context.
+ * @return
+ */
+static int init_wire_and_ctrl_pipe(usb_device_t *dev, const char **errmsg)
+{
+	int rc;
+
+	rc = usb_device_connection_initialize_from_device(&dev->wire,
+	    dev->ddf_dev);
+	if (rc != EOK) {
+		*errmsg = "device connection initialization";
+		return rc;
+	}
+
+	rc = usb_pipe_initialize_default_control(&dev->ctrl_pipe,
+	    &dev->wire);
+	if (rc != EOK) {
+		*errmsg = "default control pipe initialization";
+		return rc;
+	}
+
+	return EOK;
+}
+
+
+/** Create new instance of USB device.
+ *
+ * @param[in] ddf_dev Generic DDF device backing the USB one.
+ * @param[in] endpoints NULL terminated array of endpoints (NULL for none).
+ * @param[out] dev_ptr Where to store pointer to the new device.
+ * @param[out] errstr_ptr Where to store description of context
+ *	(in case error occurs).
+ * @return Error code.
+ */
+int usb_device_create(ddf_dev_t *ddf_dev,
+    usb_endpoint_description_t **endpoints,
+    usb_device_t **dev_ptr, const char **errstr_ptr)
+{
+	assert(dev_ptr != NULL);
+	assert(ddf_dev != NULL);
+
+	int rc;
+
+	usb_device_t *dev = malloc(sizeof(usb_device_t));
+	if (dev == NULL) {
+		*errstr_ptr = "structure allocation";
+		return ENOMEM;
+	}
+
+	// FIXME: proper deallocation in case of errors
+
+	dev->ddf_dev = ddf_dev;
+	dev->driver_data = NULL;
+	dev->descriptors.configuration = NULL;
+	dev->alternate_interfaces = NULL;
+
+	dev->pipes_count = 0;
+	dev->pipes = NULL;
+
+	/* Initialize backing wire and control pipe. */
+	rc = init_wire_and_ctrl_pipe(dev, errstr_ptr);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	/* Get our interface. */
+	dev->interface_no = usb_device_get_assigned_interface(dev->ddf_dev);
+
+	/* Retrieve standard descriptors. */
+	rc = usb_device_retrieve_descriptors(&dev->ctrl_pipe,
+	    &dev->descriptors);
+	if (rc != EOK) {
+		*errstr_ptr = "descriptor retrieval";
+		return rc;
+	}
+
+	/* Create alternate interfaces. */
+	rc = usb_alternate_interfaces_create(dev->descriptors.configuration,
+	    dev->descriptors.configuration_size, dev->interface_no,
+	    &dev->alternate_interfaces);
+	if (rc != EOK) {
+		/* We will try to silently ignore this. */
+		dev->alternate_interfaces = NULL;
+	}
+
+	rc = initialize_other_pipes(endpoints, dev, 0);
+	if (rc != EOK) {
+		*errstr_ptr = "pipes initialization";
+		return rc;
+	}
+
+	*errstr_ptr = NULL;
+	*dev_ptr = dev;
+
+	return EOK;
+}
+
+/** Destroy instance of a USB device.
+ *
+ * @param dev Device to be destroyed.
+ */
+void usb_device_destroy(usb_device_t *dev)
+{
+	if (dev == NULL) {
+		return;
+	}
+
+	/* Ignore errors and hope for the best. */
+	usb_device_destroy_pipes(dev->ddf_dev, dev->pipes, dev->pipes_count);
+	if (dev->descriptors.configuration != NULL) {
+		free(dev->descriptors.configuration);
+	}
+
+	if (dev->alternate_interfaces != NULL) {
+		if (dev->alternate_interfaces->alternatives != NULL) {
+			free(dev->alternate_interfaces->alternatives);
+		}
+		free(dev->alternate_interfaces);
+	}
+
+	free(dev);
+}
+
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/src/devpoll.c
===================================================================
--- uspace/lib/usbdev/src/devpoll.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/src/devpoll.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,317 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * USB device driver framework - automatic interrupt polling.
+ */
+#include <usb/dev/poll.h>
+#include <usb/dev/request.h>
+#include <usb/debug.h>
+#include <usb/classes/classes.h>
+#include <errno.h>
+#include <str_error.h>
+#include <assert.h>
+
+/** Maximum number of failed consecutive requests before announcing failure. */
+#define MAX_FAILED_ATTEMPTS 3
+
+/** Data needed for polling. */
+typedef struct {
+	int debug;
+	size_t max_failures;
+	useconds_t delay;
+	bool auto_clear_halt;
+	bool (*on_data)(usb_device_t *, uint8_t *, size_t, void *);
+	void (*on_polling_end)(usb_device_t *, bool, void *);
+	bool (*on_error)(usb_device_t *, int, void *);
+
+	usb_device_t *dev;
+	size_t pipe_index;
+	size_t request_size;
+	uint8_t *buffer;
+	void *custom_arg;
+} polling_data_t;
+
+
+/** Polling fibril.
+ *
+ * @param arg Pointer to polling_data_t.
+ * @return Always EOK.
+ */
+static int polling_fibril(void *arg)
+{
+	polling_data_t *polling_data = (polling_data_t *) arg;
+	assert(polling_data);
+
+	usb_pipe_t *pipe
+	    = polling_data->dev->pipes[polling_data->pipe_index].pipe;
+	
+	if (polling_data->debug > 0) {
+		usb_endpoint_mapping_t *mapping
+		    = &polling_data->dev->pipes[polling_data->pipe_index];
+		usb_log_debug("Poll%p: started polling of `%s' - " \
+		    "interface %d (%s,%d,%d), %zuB/%zu.\n",
+		    polling_data,
+		    polling_data->dev->ddf_dev->name,
+		    (int) mapping->interface->interface_number,
+		    usb_str_class(mapping->interface->interface_class),
+		    (int) mapping->interface->interface_subclass,
+		    (int) mapping->interface->interface_protocol,
+		    polling_data->request_size, pipe->max_packet_size);
+	}
+
+	size_t failed_attempts = 0;
+	while (failed_attempts <= polling_data->max_failures) {
+		int rc;
+
+		size_t actual_size;
+		rc = usb_pipe_read(pipe, polling_data->buffer,
+		    polling_data->request_size, &actual_size);
+
+		if (polling_data->debug > 1) {
+			if (rc == EOK) {
+				usb_log_debug(
+				    "Poll%p: received: '%s' (%zuB).\n",
+				    polling_data,
+				    usb_debug_str_buffer(polling_data->buffer,
+				        actual_size, 16),
+				    actual_size);
+			} else {
+				usb_log_debug(
+				    "Poll%p: polling failed: %s.\n",
+				    polling_data, str_error(rc));
+			}
+		}
+
+		/* If the pipe stalled, we can try to reset the stall. */
+		if ((rc == ESTALL) && (polling_data->auto_clear_halt)) {
+			/*
+			 * We ignore error here as this is usually a futile
+			 * attempt anyway.
+			 */
+			usb_request_clear_endpoint_halt(
+			    &polling_data->dev->ctrl_pipe,
+			    pipe->endpoint_no);
+		}
+
+		if (rc != EOK) {
+			if (polling_data->on_error != NULL) {
+				bool cont = polling_data->on_error(
+				    polling_data->dev, rc,
+				    polling_data->custom_arg);
+				if (!cont) {
+					failed_attempts
+					    = polling_data->max_failures;
+				}
+			}
+			failed_attempts++;
+			continue;
+		}
+
+		/* We have the data, execute the callback now. */
+		bool carry_on = polling_data->on_data(polling_data->dev,
+		    polling_data->buffer, actual_size,
+		    polling_data->custom_arg);
+
+		if (!carry_on) {
+			failed_attempts = 0;
+			break;
+		}
+
+		/* Reset as something might be only a temporary problem. */
+		failed_attempts = 0;
+
+		/* Take a rest before next request. */
+		async_usleep(polling_data->delay);
+	}
+
+	if (polling_data->on_polling_end != NULL) {
+		polling_data->on_polling_end(polling_data->dev,
+		    failed_attempts > 0, polling_data->custom_arg);
+	}
+
+	if (polling_data->debug > 0) {
+		if (failed_attempts > 0) {
+			usb_log_error(
+			    "Polling of device `%s' terminated: %s.\n",
+			    polling_data->dev->ddf_dev->name,
+			    "recurring failures");
+		} else {
+			usb_log_debug(
+			    "Polling of device `%s' terminated by user.\n",
+			    polling_data->dev->ddf_dev->name
+			);
+		}
+	}
+
+	/* Free the allocated memory. */
+	free(polling_data->buffer);
+	free(polling_data);
+
+	return EOK;
+}
+
+/** Start automatic device polling over interrupt in pipe.
+ *
+ * @warning It is up to the callback to produce delays between individual
+ * requests.
+ *
+ * @warning There is no guarantee when the request to the device
+ * will be sent for the first time (it is possible that this
+ * first request would be executed prior to return from this function).
+ *
+ * @param dev Device to be periodically polled.
+ * @param pipe_index Index of the endpoint pipe used for polling.
+ * @param callback Callback when data are available.
+ * @param request_size How many bytes to ask for in each request.
+ * @param terminated_callback Callback when polling is terminated.
+ * @param arg Custom argument (passed as is to the callbacks).
+ * @return Error code.
+ * @retval EOK New fibril polling the device was already started.
+ */
+int usb_device_auto_poll(usb_device_t *dev, size_t pipe_index,
+    usb_polling_callback_t callback, size_t request_size,
+    usb_polling_terminted_callback_t terminated_callback, void *arg)
+{
+	if ((dev == NULL) || (callback == NULL)) {
+		return EBADMEM;
+	}
+	if (request_size == 0) {
+		return EINVAL;
+	}
+	if ((dev->pipes[pipe_index].pipe->transfer_type != USB_TRANSFER_INTERRUPT)
+	    || (dev->pipes[pipe_index].pipe->direction != USB_DIRECTION_IN)) {
+		return EINVAL;
+	}
+
+	usb_device_auto_polling_t *auto_polling
+	    = malloc(sizeof(usb_device_auto_polling_t));
+	if (auto_polling == NULL) {
+		return ENOMEM;
+	}
+
+	auto_polling->debug = 1;
+	auto_polling->auto_clear_halt = true;
+	auto_polling->delay = 0;
+	auto_polling->max_failures = MAX_FAILED_ATTEMPTS;
+	auto_polling->on_data = callback;
+	auto_polling->on_polling_end = terminated_callback;
+	auto_polling->on_error = NULL;
+
+	int rc = usb_device_auto_polling(dev, pipe_index, auto_polling,
+	   request_size, arg);
+
+	free(auto_polling);
+
+	return rc;
+}
+
+/** Start automatic device polling over interrupt in pipe.
+ *
+ * The polling settings is copied thus it is okay to destroy the structure
+ * after this function returns.
+ *
+ * @warning There is no guarantee when the request to the device
+ * will be sent for the first time (it is possible that this
+ * first request would be executed prior to return from this function).
+ *
+ * @param dev Device to be periodically polled.
+ * @param pipe_index Index of the endpoint pipe used for polling.
+ * @param polling Polling settings.
+ * @param request_size How many bytes to ask for in each request.
+ * @param arg Custom argument (passed as is to the callbacks).
+ * @return Error code.
+ * @retval EOK New fibril polling the device was already started.
+ */
+int usb_device_auto_polling(usb_device_t *dev, size_t pipe_index,
+    usb_device_auto_polling_t *polling,
+    size_t request_size, void *arg)
+{
+	if (dev == NULL) {
+		return EBADMEM;
+	}
+	if (pipe_index >= dev->pipes_count) {
+		return EINVAL;
+	}
+	if ((dev->pipes[pipe_index].pipe->transfer_type != USB_TRANSFER_INTERRUPT)
+	    || (dev->pipes[pipe_index].pipe->direction != USB_DIRECTION_IN)) {
+		return EINVAL;
+	}
+	if ((polling == NULL) || (polling->on_data == NULL)) {
+		return EBADMEM;
+	}
+
+	polling_data_t *polling_data = malloc(sizeof(polling_data_t));
+	if (polling_data == NULL) {
+		return ENOMEM;
+	}
+
+	/* Fill-in the data. */
+	polling_data->buffer = malloc(sizeof(request_size));
+	if (polling_data->buffer == NULL) {
+		free(polling_data);
+		return ENOMEM;
+	}
+	polling_data->request_size = request_size;
+	polling_data->dev = dev;
+	polling_data->pipe_index = pipe_index;
+	polling_data->custom_arg = arg;
+
+	polling_data->debug = polling->debug;
+	polling_data->max_failures = polling->max_failures;
+	if (polling->delay >= 0) {
+		polling_data->delay = (useconds_t) polling->delay;
+	} else {
+		polling_data->delay = (useconds_t) dev->pipes[pipe_index]
+		    .descriptor->poll_interval;
+	}
+	polling_data->auto_clear_halt = polling->auto_clear_halt;
+
+	polling_data->on_data = polling->on_data;
+	polling_data->on_polling_end = polling->on_polling_end;
+	polling_data->on_error = polling->on_error;
+
+	fid_t fibril = fibril_create(polling_fibril, polling_data);
+	if (fibril == 0) {
+		free(polling_data->buffer);
+		free(polling_data);
+		return ENOMEM;
+	}
+	fibril_add_ready(fibril);
+
+	/* Fibril launched. That fibril will free the allocated data. */
+
+	return EOK;
+}
+
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/src/dp.c
===================================================================
--- uspace/lib/usbdev/src/dp.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/src/dp.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,326 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/**
+ * @file
+ * USB descriptor parser (implementation).
+ *
+ * The descriptor parser is a generic parser for structure, where individual
+ * items are stored in single buffer and each item begins with length followed
+ * by type. These types are organized into tree hierarchy.
+ *
+ * The parser is able of only two actions: find first child and find next
+ * sibling.
+ */
+#include <stdio.h>
+#include <str_error.h>
+#include <errno.h>
+#include <assert.h>
+#include <bool.h>
+#include <usb/dev/dp.h>
+#include <usb/descriptor.h>
+
+#define NESTING(parentname, childname) \
+	{ \
+		.child = USB_DESCTYPE_##childname, \
+		.parent = USB_DESCTYPE_##parentname, \
+	}
+#define LAST_NESTING { -1, -1 }
+
+/** Nesting of standard USB descriptors. */
+usb_dp_descriptor_nesting_t usb_dp_standard_descriptor_nesting[] = {
+	NESTING(CONFIGURATION, INTERFACE),
+	NESTING(INTERFACE, ENDPOINT),
+	NESTING(INTERFACE, HUB),
+	NESTING(INTERFACE, HID),
+	NESTING(HID, HID_REPORT),
+	LAST_NESTING
+};
+
+#undef NESTING
+#undef LAST_NESTING
+
+/** Tells whether pointer points inside descriptor data.
+ *
+ * @param data Parser data.
+ * @param ptr Pointer to be verified.
+ * @return Whether @p ptr points inside <code>data->data</code> field.
+ */
+static bool is_valid_descriptor_pointer(usb_dp_parser_data_t *data,
+    uint8_t *ptr)
+{
+	if (ptr == NULL) {
+		return false;
+	}
+
+	if (ptr < data->data) {
+		return false;
+	}
+
+	if ((size_t)(ptr - data->data) >= data->size) {
+		return false;
+	}
+
+	return true;
+}
+
+/** Get next descriptor regardless of the nesting.
+ *
+ * @param data Parser data.
+ * @param current Pointer to current descriptor.
+ * @return Pointer to start of next descriptor.
+ * @retval NULL Invalid input or no next descriptor.
+ */
+static uint8_t *get_next_descriptor(usb_dp_parser_data_t *data,
+    uint8_t *current)
+{
+	assert(is_valid_descriptor_pointer(data, current));
+
+	uint8_t current_length = *current;
+	uint8_t *next = current + current_length;
+
+	if (!is_valid_descriptor_pointer(data, next)) {
+		return NULL;
+	}
+
+	return next;
+}
+
+/** Get descriptor type.
+ *
+ * @see usb_descriptor_type_t
+ *
+ * @param data Parser data.
+ * @param start Pointer to start of the descriptor.
+ * @return Descriptor type.
+ * @retval -1 Invalid input.
+ */
+static int get_descriptor_type(usb_dp_parser_data_t *data, uint8_t *start)
+{
+	if (start == NULL) {
+		return -1;
+	}
+
+	start++;
+	if (!is_valid_descriptor_pointer(data, start)) {
+		return -1;
+	} else {
+		return (int) (*start);
+	}
+}
+
+/** Tells whether descriptors could be nested.
+ *
+ * @param parser Parser.
+ * @param child Child descriptor type.
+ * @param parent Parent descriptor type.
+ * @return Whether @p child could be child of @p parent.
+ */
+static bool is_nested_descriptor_type(usb_dp_parser_t *parser,
+    int child, int parent)
+{
+	usb_dp_descriptor_nesting_t *nesting = parser->nesting;
+	while ((nesting->child > 0) && (nesting->parent > 0)) {
+		if ((nesting->child == child) && (nesting->parent == parent)) {
+			return true;
+		}
+		nesting++;
+	}
+	return false;
+}
+
+/** Tells whether descriptors could be nested.
+ *
+ * @param parser Parser.
+ * @param data Parser data.
+ * @param child Pointer to child descriptor.
+ * @param parent Pointer to parent descriptor.
+ * @return Whether @p child could be child of @p parent.
+ */
+static bool is_nested_descriptor(usb_dp_parser_t *parser,
+    usb_dp_parser_data_t *data, uint8_t *child, uint8_t *parent)
+{
+	return is_nested_descriptor_type(parser,
+	    get_descriptor_type(data, child),
+	    get_descriptor_type(data, parent));
+}
+
+/** Find first nested descriptor of given parent.
+ *
+ * @param parser Parser.
+ * @param data Parser data.
+ * @param parent Pointer to the beginning of parent descriptor.
+ * @return Pointer to the beginning of the first nested (child) descriptor.
+ * @retval NULL No child descriptor found.
+ * @retval NULL Invalid input.
+ */
+uint8_t *usb_dp_get_nested_descriptor(usb_dp_parser_t *parser,
+    usb_dp_parser_data_t *data, uint8_t *parent)
+{
+	if (!is_valid_descriptor_pointer(data, parent)) {
+		return NULL;
+	}
+
+	uint8_t *next = get_next_descriptor(data, parent);
+	if (next == NULL) {
+		return NULL;
+	}
+
+	if (is_nested_descriptor(parser, data, next, parent)) {
+		return next;
+	} else {
+		return NULL;
+	}
+}
+
+/** Skip all nested descriptors.
+ *
+ * @param parser Parser.
+ * @param data Parser data.
+ * @param parent Pointer to the beginning of parent descriptor.
+ * @return Pointer to first non-child descriptor.
+ * @retval NULL No next descriptor.
+ * @retval NULL Invalid input.
+ */
+static uint8_t *skip_nested_descriptors(usb_dp_parser_t *parser,
+    usb_dp_parser_data_t *data, uint8_t *parent)
+{
+	uint8_t *child = usb_dp_get_nested_descriptor(parser, data, parent);
+	if (child == NULL) {
+		return get_next_descriptor(data, parent);
+	}
+	uint8_t *next_child = skip_nested_descriptors(parser, data, child);
+	while (is_nested_descriptor(parser, data, next_child, parent)) {
+		next_child = skip_nested_descriptors(parser, data, next_child);
+	}
+
+	return next_child;
+}
+
+/** Get sibling descriptor.
+ *
+ * @param parser Parser.
+ * @param data Parser data.
+ * @param parent Pointer to common parent descriptor.
+ * @param sibling Left sibling.
+ * @return Pointer to first right sibling of @p sibling.
+ * @retval NULL No sibling exist.
+ * @retval NULL Invalid input.
+ */
+uint8_t *usb_dp_get_sibling_descriptor(usb_dp_parser_t *parser,
+    usb_dp_parser_data_t *data, uint8_t *parent, uint8_t *sibling)
+{
+	if (!is_valid_descriptor_pointer(data, parent)
+	    || !is_valid_descriptor_pointer(data, sibling)) {
+		return NULL;
+	}
+
+	uint8_t *possible_sibling = skip_nested_descriptors(parser, data, sibling);
+	if (possible_sibling == NULL) {
+		return NULL;
+	}
+
+	int parent_type = get_descriptor_type(data, parent);
+	int possible_sibling_type = get_descriptor_type(data, possible_sibling);
+	if (is_nested_descriptor_type(parser, possible_sibling_type, parent_type)) {
+		return possible_sibling;
+	} else {
+		return NULL;
+	}
+}
+
+/** Browser of the descriptor tree.
+ *
+ * @see usb_dp_walk_simple
+ *
+ * @param parser Descriptor parser.
+ * @param data Data for descriptor parser.
+ * @param root Pointer to current root of the tree.
+ * @param depth Current nesting depth.
+ * @param callback Callback for each found descriptor.
+ * @param arg Custom (user) argument.
+ */
+static void usb_dp_browse_simple_internal(usb_dp_parser_t *parser,
+    usb_dp_parser_data_t *data, uint8_t *root, size_t depth,
+    void (*callback)(uint8_t *, size_t, void *), void *arg)
+{
+	if (root == NULL) {
+		return;
+	}
+	callback(root, depth, arg);
+	uint8_t *child = usb_dp_get_nested_descriptor(parser, data, root);
+	do {
+		usb_dp_browse_simple_internal(parser, data, child, depth + 1,
+		    callback, arg);
+		child = usb_dp_get_sibling_descriptor(parser, data,
+		    root, child);
+	} while (child != NULL);
+}
+
+/** Browse flatten descriptor tree.
+ *
+ * The callback is called with following arguments: pointer to the start
+ * of the descriptor (somewhere inside @p descriptors), depth of the nesting
+ * (starting from 0 for the first descriptor) and the custom argument.
+ * Note that the size of the descriptor is not passed because it can
+ * be read from the first byte of the descriptor.
+ *
+ * @param descriptors Descriptor data.
+ * @param descriptors_size Size of descriptor data (in bytes).
+ * @param descriptor_nesting Possible descriptor nesting.
+ * @param callback Callback for each found descriptor.
+ * @param arg Custom (user) argument.
+ */
+void usb_dp_walk_simple(uint8_t *descriptors, size_t descriptors_size,
+    usb_dp_descriptor_nesting_t *descriptor_nesting,
+    void (*callback)(uint8_t *, size_t, void *), void *arg)
+{
+	if ((descriptors == NULL) || (descriptors_size == 0)
+	    || (descriptor_nesting == NULL) || (callback == NULL)) {
+		return;
+	}
+
+	usb_dp_parser_data_t data = {
+		.data = descriptors,
+		.size = descriptors_size,
+		.arg = NULL
+	};
+
+	usb_dp_parser_t parser = {
+		.nesting = descriptor_nesting
+	};
+
+	usb_dp_browse_simple_internal(&parser, &data, descriptors,
+	    0, callback, arg);
+}
+
+/** @}
+ */
Index: uspace/lib/usbdev/src/hub.c
===================================================================
--- uspace/lib/usbdev/src/hub.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/src/hub.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,377 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * Functions needed by hub drivers.
+ */
+#include <usb/dev/hub.h>
+#include <usb/dev/pipes.h>
+#include <usb/dev/request.h>
+#include <usb/dev/recognise.h>
+#include <usbhc_iface.h>
+#include <errno.h>
+#include <assert.h>
+#include <usb/debug.h>
+#include <time.h>
+#include <async.h>
+
+/** How much time to wait between attempts to register endpoint 0:0.
+ * The value is based on typical value for port reset + some overhead.
+ */
+#define ENDPOINT_0_0_REGISTER_ATTEMPT_DELAY_USEC (1000 * (10 + 2))
+
+/** Check that HC connection is alright.
+ *
+ * @param conn Connection to be checked.
+ */
+#define CHECK_CONNECTION(conn) \
+	do { \
+		assert((conn)); \
+		if (!usb_hc_connection_is_opened((conn))) { \
+			return ENOENT; \
+		} \
+	} while (false)
+
+/** Ask host controller for free address assignment.
+ *
+ * @param connection Opened connection to host controller.
+ * @param speed Speed of the new device (device that will be assigned
+ *    the returned address).
+ * @return Assigned USB address or negative error code.
+ */
+usb_address_t usb_hc_request_address(usb_hc_connection_t *connection,
+    usb_speed_t speed)
+{
+	CHECK_CONNECTION(connection);
+	
+	async_exch_t *exch = async_exchange_begin(connection->hc_sess);
+	
+	sysarg_t address;
+	int rc = async_req_2_1(exch, DEV_IFACE_ID(USBHC_DEV_IFACE),
+	    IPC_M_USBHC_REQUEST_ADDRESS, speed,
+	    &address);
+	
+	async_exchange_end(exch);
+	
+	if (rc != EOK)
+		return (usb_address_t) rc;
+	
+	return (usb_address_t) address;
+}
+
+/** Inform host controller about new device.
+ *
+ * @param connection Opened connection to host controller.
+ * @param attached_device Information about the new device.
+ * @return Error code.
+ */
+int usb_hc_register_device(usb_hc_connection_t * connection,
+    const usb_hc_attached_device_t *attached_device)
+{
+	CHECK_CONNECTION(connection);
+	
+	if (attached_device == NULL)
+		return EBADMEM;
+	
+	async_exch_t *exch = async_exchange_begin(connection->hc_sess);
+	int rc = async_req_3_0(exch, DEV_IFACE_ID(USBHC_DEV_IFACE),
+	    IPC_M_USBHC_BIND_ADDRESS,
+	    attached_device->address, attached_device->handle);
+	async_exchange_end(exch);
+	
+	return rc;
+}
+
+/** Inform host controller about device removal.
+ *
+ * @param connection Opened connection to host controller.
+ * @param address Address of the device that is being removed.
+ * @return Error code.
+ */
+int usb_hc_unregister_device(usb_hc_connection_t *connection,
+    usb_address_t address)
+{
+	CHECK_CONNECTION(connection);
+	
+	async_exch_t *exch = async_exchange_begin(connection->hc_sess);
+	int rc = async_req_2_0(exch, DEV_IFACE_ID(USBHC_DEV_IFACE),
+	    IPC_M_USBHC_RELEASE_ADDRESS, address);
+	async_exchange_end(exch);
+	
+	return rc;
+}
+
+
+static void unregister_control_endpoint_on_default_address(
+    usb_hc_connection_t *connection)
+{
+	usb_device_connection_t dev_conn;
+	int rc = usb_device_connection_initialize_on_default_address(&dev_conn,
+	    connection);
+	if (rc != EOK) {
+		return;
+	}
+
+	usb_pipe_t ctrl_pipe;
+	rc = usb_pipe_initialize_default_control(&ctrl_pipe, &dev_conn);
+	if (rc != EOK) {
+		return;
+	}
+
+	usb_pipe_unregister(&ctrl_pipe, connection);
+}
+
+
+/** Wrapper for registering attached device to the hub.
+ *
+ * The @p enable_port function is expected to enable signaling on given
+ * port.
+ * The two arguments to it can have arbitrary meaning
+ * (the @p port_no is only a suggestion)
+ * and are not touched at all by this function
+ * (they are passed as is to the @p enable_port function).
+ *
+ * If the @p enable_port fails (i.e. does not return EOK), the device
+ * addition is canceled.
+ * The return value is then returned (it is good idea to use different
+ * error codes than those listed as return codes by this function itself).
+ *
+ * The @p connection representing connection with host controller does not
+ * need to be started.
+ * This function duplicates the connection to allow simultaneous calls of
+ * this function (i.e. from different fibrils).
+ *
+ * @param[in] parent Parent device (i.e. the hub device).
+ * @param[in] connection Connection to host controller.
+ * @param[in] dev_speed New device speed.
+ * @param[in] enable_port Function for enabling signaling through the port the
+ *	device is attached to.
+ * @param[in] port_no Port number (passed through to @p enable_port).
+ * @param[in] arg Any data argument to @p enable_port.
+ * @param[out] assigned_address USB address of the device.
+ * @param[out] assigned_handle Devman handle of the new device.
+ * @param[in] dev_ops Child device ops.
+ * @param[in] new_dev_data Arbitrary pointer to be stored in the child
+ *	as @c driver_data.
+ * @param[out] new_fun Storage where pointer to allocated child function
+ *	will be written.
+ * @return Error code.
+ * @retval ENOENT Connection to HC not opened.
+ * @retval EADDRNOTAVAIL Failed retrieving free address from host controller.
+ * @retval EBUSY Failed reserving default USB address.
+ * @retval ENOTCONN Problem connecting to the host controller via USB pipe.
+ * @retval ESTALL Problem communication with device (either SET_ADDRESS
+ *	request or requests for descriptors when creating match ids).
+ */
+int usb_hc_new_device_wrapper(ddf_dev_t *parent, usb_hc_connection_t *connection,
+    usb_speed_t dev_speed,
+    int (*enable_port)(int port_no, void *arg), int port_no, void *arg,
+    usb_address_t *assigned_address, devman_handle_t *assigned_handle,
+    ddf_dev_ops_t *dev_ops, void *new_dev_data, ddf_fun_t **new_fun)
+{
+	assert(connection != NULL);
+	// FIXME: this is awful, we are accessing directly the structure.
+	usb_hc_connection_t hc_conn = {
+		.hc_handle = connection->hc_handle,
+		.hc_sess = NULL
+	};
+
+	int rc;
+	struct timeval start_time;
+
+	rc = gettimeofday(&start_time, NULL);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	rc = usb_hc_connection_open(&hc_conn);
+	if (rc != EOK) {
+		return rc;
+	}
+
+
+	/*
+	 * Request new address.
+	 */
+	usb_address_t dev_addr = usb_hc_request_address(&hc_conn, dev_speed);
+	if (dev_addr < 0) {
+		usb_hc_connection_close(&hc_conn);
+		return EADDRNOTAVAIL;
+	}
+
+	/*
+	 * We will not register control pipe on default address.
+	 * The registration might fail. That means that someone else already
+	 * registered that endpoint. We will simply wait and try again.
+	 * (Someone else already wants to add a new device.)
+	 */
+	usb_device_connection_t dev_conn;
+	rc = usb_device_connection_initialize_on_default_address(&dev_conn,
+	    &hc_conn);
+	if (rc != EOK) {
+		rc = ENOTCONN;
+		goto leave_release_free_address;
+	}
+
+	usb_pipe_t ctrl_pipe;
+	rc = usb_pipe_initialize_default_control(&ctrl_pipe,
+	    &dev_conn);
+	if (rc != EOK) {
+		rc = ENOTCONN;
+		goto leave_release_free_address;
+	}
+
+	do {
+		rc = usb_pipe_register_with_speed(&ctrl_pipe, dev_speed, 0,
+		    &hc_conn);
+		if (rc != EOK) {
+			/* Do not overheat the CPU ;-). */
+			async_usleep(ENDPOINT_0_0_REGISTER_ATTEMPT_DELAY_USEC);
+		}
+	} while (rc != EOK);
+	struct timeval end_time;
+
+	rc = gettimeofday(&end_time, NULL);
+	if (rc != EOK) {
+		goto leave_release_default_address;
+	}
+
+	/* According to the USB spec part 9.1.2 host allows 100ms time for
+	 * the insertion process to complete. According to 7.1.7.1 this is the
+	 * time between attach detected and port reset. However, the setup done
+	 * above might use much of this time so we should only wait to fill
+	 * up the 100ms quota*/
+	suseconds_t elapsed = tv_sub(&end_time, &start_time);
+	if (elapsed < 100000) {
+		async_usleep(100000 - elapsed);
+	}
+
+	/*
+	 * Endpoint is registered. We can enable the port and change
+	 * device address.
+	 */
+	rc = enable_port(port_no, arg);
+	if (rc != EOK) {
+		goto leave_release_default_address;
+	}
+	/* USB spec 7.1.7.1: The USB System Software guarantees a minimum of
+	 * 10ms for reset recovery. Device response to any bus transactions
+	 * addressed to the default device address during the reset recovery
+	 * time is undefined.
+	 */
+	async_usleep(10000);
+
+	rc = usb_pipe_probe_default_control(&ctrl_pipe);
+	if (rc != EOK) {
+		rc = ESTALL;
+		goto leave_release_default_address;
+	}
+
+	rc = usb_request_set_address(&ctrl_pipe, dev_addr);
+	if (rc != EOK) {
+		rc = ESTALL;
+		goto leave_release_default_address;
+	}
+
+	/*
+	 * Address changed. We can release the original endpoint, thus
+	 * allowing other to access the default address.
+	 */
+	unregister_control_endpoint_on_default_address(&hc_conn);
+
+	/*
+	 * Time to register the new endpoint.
+	 */
+	rc = usb_pipe_register(&ctrl_pipe, 0, &hc_conn);
+	if (rc != EOK) {
+		goto leave_release_free_address;
+	}
+
+	/*
+	 * It is time to register the device with devman.
+	 */
+	/* FIXME: create device_register that will get opened ctrl pipe. */
+	devman_handle_t child_handle;
+	rc = usb_device_register_child_in_devman(dev_addr, dev_conn.hc_handle,
+	    parent, &child_handle,
+	    dev_ops, new_dev_data, new_fun);
+	if (rc != EOK) {
+		rc = ESTALL;
+		goto leave_release_free_address;
+	}
+
+	/*
+	 * And now inform the host controller about the handle.
+	 */
+	usb_hc_attached_device_t new_device = {
+		.address = dev_addr,
+		.handle = child_handle
+	};
+	rc = usb_hc_register_device(&hc_conn, &new_device);
+	if (rc != EOK) {
+		rc = EDESTADDRREQ;
+		goto leave_release_free_address;
+	}
+	
+	usb_hc_connection_close(&hc_conn);
+
+	/*
+	 * And we are done.
+	 */
+	if (assigned_address != NULL) {
+		*assigned_address = dev_addr;
+	}
+	if (assigned_handle != NULL) {
+		*assigned_handle = child_handle;
+	}
+
+	return EOK;
+
+
+
+	/*
+	 * Error handling (like nested exceptions) starts here.
+	 * Completely ignoring errors here.
+	 */
+leave_release_default_address:
+	usb_pipe_unregister(&ctrl_pipe, &hc_conn);
+
+leave_release_free_address:
+	usb_hc_unregister_device(&hc_conn, dev_addr);
+
+	usb_hc_connection_close(&hc_conn);
+
+	return rc;
+}
+
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/src/pipepriv.c
===================================================================
--- uspace/lib/usbdev/src/pipepriv.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/src/pipepriv.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,147 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * Library internal functions on USB pipes (implementation).
+ */
+#include "pipepriv.h"
+#include <devman.h>
+#include <errno.h>
+#include <assert.h>
+
+/** Ensure exclusive access to the IPC phone of given pipe.
+ *
+ * @param pipe Pipe to be exclusively accessed.
+ */
+void pipe_start_transaction(usb_pipe_t *pipe)
+{
+	fibril_mutex_lock(&pipe->hc_sess_mutex);
+}
+
+/** Terminate exclusive access to the IPC phone of given pipe.
+ *
+ * @param pipe Pipe to be released from exclusive usage.
+ */
+void pipe_end_transaction(usb_pipe_t *pipe)
+{
+	fibril_mutex_unlock(&pipe->hc_sess_mutex);
+}
+
+/** Ensure exclusive access to the pipe as a whole.
+ *
+ * @param pipe Pipe to be exclusively accessed.
+ */
+void pipe_acquire(usb_pipe_t *pipe)
+{
+	fibril_mutex_lock(&pipe->guard);
+}
+
+/** Terminate exclusive access to the pipe as a whole.
+ *
+ * @param pipe Pipe to be released from exclusive usage.
+ */
+void pipe_release(usb_pipe_t *pipe)
+{
+	fibril_mutex_unlock(&pipe->guard);
+}
+
+/** Add reference of active transfers over the pipe.
+ *
+ * @param pipe The USB pipe.
+ * @param hide_failure Whether to hide failure when adding reference
+ *	(use soft refcount).
+ * @return Error code.
+ * @retval EOK Currently always.
+ */
+int pipe_add_ref(usb_pipe_t *pipe, bool hide_failure)
+{
+	pipe_acquire(pipe);
+	
+	if (pipe->refcount == 0) {
+		/* Need to open the phone by ourselves. */
+		async_sess_t *sess =
+		    devman_device_connect(EXCHANGE_SERIALIZE, pipe->wire->hc_handle, 0);
+		if (!sess) {
+			if (hide_failure) {
+				pipe->refcount_soft++;
+				pipe_release(pipe);
+				return EOK;
+			}
+			
+			pipe_release(pipe);
+			return ENOMEM;
+		}
+		
+		/*
+		 * No locking is needed, refcount is zero and whole pipe
+		 * mutex is locked.
+		 */
+		
+		pipe->hc_sess = sess;
+	}
+	
+	pipe->refcount++;
+	pipe_release(pipe);
+	
+	return EOK;
+}
+
+/** Drop active transfer reference on the pipe.
+ *
+ * @param pipe The USB pipe.
+ */
+void pipe_drop_ref(usb_pipe_t *pipe)
+{
+	pipe_acquire(pipe);
+	
+	if (pipe->refcount_soft > 0) {
+		pipe->refcount_soft--;
+		pipe_release(pipe);
+		return;
+	}
+	
+	assert(pipe->refcount > 0);
+	
+	pipe->refcount--;
+	
+	if (pipe->refcount == 0) {
+		/* We were the last users, let's hang-up. */
+		async_hangup(pipe->hc_sess);
+		pipe->hc_sess = NULL;
+	}
+	
+	pipe_release(pipe);
+}
+
+
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/src/pipepriv.h
===================================================================
--- uspace/lib/usbdev/src/pipepriv.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/src/pipepriv.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * Library internal functions on USB pipes.
+ */
+#ifndef LIBUSBDEV_PIPEPRIV_H_
+#define LIBUSBDEV_PIPEPRIV_H_
+
+#include <usb/dev/pipes.h>
+#include <bool.h>
+
+void pipe_acquire(usb_pipe_t *);
+void pipe_release(usb_pipe_t *);
+
+void pipe_start_transaction(usb_pipe_t *);
+void pipe_end_transaction(usb_pipe_t *);
+
+int pipe_add_ref(usb_pipe_t *, bool);
+void pipe_drop_ref(usb_pipe_t *);
+
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/src/pipes.c
===================================================================
--- uspace/lib/usbdev/src/pipes.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/src/pipes.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,234 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * USB endpoint pipes miscellaneous functions.
+ */
+#include <usb/usb.h>
+#include <usb/dev/pipes.h>
+#include <usb/debug.h>
+#include <usb/hc.h>
+#include <usbhc_iface.h>
+#include <usb_iface.h>
+#include <devman.h>
+#include <errno.h>
+#include <assert.h>
+#include "pipepriv.h"
+
+#define IPC_AGAIN_DELAY (1000 * 2) /* 2ms */
+
+/** Tell USB address assigned to given device.
+ *
+ * @param sess Session to parent device.
+ * @param dev Device in question.
+ * @return USB address or error code.
+ */
+static usb_address_t get_my_address(async_sess_t *sess, ddf_dev_t *dev)
+{
+	async_exch_t *exch = async_exchange_begin(sess);
+	
+	/*
+	 * We are sending special value as a handle - zero - to get
+	 * handle of the parent function (that handle was used
+	 * when registering our device @p dev.
+	 */
+	sysarg_t address;
+	int rc = async_req_2_1(exch, DEV_IFACE_ID(USB_DEV_IFACE),
+	    IPC_M_USB_GET_ADDRESS, 0, &address);
+	
+	async_exchange_end(exch);
+	
+	if (rc != EOK)
+		return rc;
+	
+	return (usb_address_t) address;
+}
+
+/** Tell USB interface assigned to given device.
+ *
+ * @param device Device in question.
+ * @return Interface number (negative code means any).
+ */
+int usb_device_get_assigned_interface(ddf_dev_t *device)
+{
+	async_sess_t *parent_sess =
+	    devman_parent_device_connect(EXCHANGE_SERIALIZE, device->handle,
+	    IPC_FLAG_BLOCKING);
+	if (!parent_sess)
+		return -1;
+	
+	async_exch_t *exch = async_exchange_begin(parent_sess);
+	
+	sysarg_t iface_no;
+	int rc = async_req_2_1(exch, DEV_IFACE_ID(USB_DEV_IFACE),
+	    IPC_M_USB_GET_INTERFACE, device->handle, &iface_no);
+	
+	async_exchange_end(exch);
+	async_hangup(parent_sess);
+	
+	if (rc != EOK)
+		return -1;
+	
+	return (int) iface_no;
+}
+
+/** Initialize connection to USB device.
+ *
+ * @param connection Connection structure to be initialized.
+ * @param dev Generic device backing the USB device.
+ * @return Error code.
+ */
+int usb_device_connection_initialize_from_device(
+    usb_device_connection_t *connection, ddf_dev_t *dev)
+{
+	assert(connection);
+	assert(dev);
+	
+	int rc;
+	devman_handle_t hc_handle;
+	usb_address_t my_address;
+	
+	rc = usb_hc_find(dev->handle, &hc_handle);
+	if (rc != EOK)
+		return rc;
+	
+	async_sess_t *parent_sess =
+	    devman_parent_device_connect(EXCHANGE_SERIALIZE, dev->handle,
+	    IPC_FLAG_BLOCKING);
+	if (!parent_sess)
+		return ENOMEM;
+	
+	/*
+	 * Asking for "my" address may require several attempts.
+	 * That is because following scenario may happen:
+	 *  - parent driver (i.e. driver of parent device) announces new device
+	 *    and devman launches current driver
+	 *  - parent driver is preempted and thus does not send address-handle
+	 *    binding to HC driver
+	 *  - this driver gets here and wants the binding
+	 *  - the HC does not know the binding yet and thus it answers ENOENT
+	 *  So, we need to wait for the HC to learn the binding.
+	 */
+	
+	do {
+		my_address = get_my_address(parent_sess, dev);
+		
+		if (my_address == ENOENT) {
+			/* Be nice, let other fibrils run and try again. */
+			async_usleep(IPC_AGAIN_DELAY);
+		} else if (my_address < 0) {
+			/* Some other problem, no sense trying again. */
+			rc = my_address;
+			goto leave;
+		}
+	
+	} while (my_address < 0);
+	
+	rc = usb_device_connection_initialize(connection,
+	    hc_handle, my_address);
+	
+leave:
+	async_hangup(parent_sess);
+	return rc;
+}
+
+/** Initialize connection to USB device.
+ *
+ * @param connection Connection structure to be initialized.
+ * @param host_controller_handle Devman handle of host controller device is
+ * 	connected to.
+ * @param device_address Device USB address.
+ * @return Error code.
+ */
+int usb_device_connection_initialize(usb_device_connection_t *connection,
+    devman_handle_t host_controller_handle, usb_address_t device_address)
+{
+	assert(connection);
+
+	if ((device_address < 0) || (device_address >= USB11_ADDRESS_MAX)) {
+		return EINVAL;
+	}
+
+	connection->hc_handle = host_controller_handle;
+	connection->address = device_address;
+
+	return EOK;
+}
+
+/** Initialize connection to USB device on default address.
+ *
+ * @param dev_connection Device connection structure to be initialized.
+ * @param hc_connection Initialized connection to host controller.
+ * @return Error code.
+ */
+int usb_device_connection_initialize_on_default_address(
+    usb_device_connection_t *dev_connection,
+    usb_hc_connection_t *hc_connection)
+{
+	assert(dev_connection);
+
+	if (hc_connection == NULL) {
+		return EBADMEM;
+	}
+
+	return usb_device_connection_initialize(dev_connection,
+	    hc_connection->hc_handle, (usb_address_t) 0);
+}
+
+/** Prepare pipe for a long transfer.
+ *
+ * By a long transfer is mean transfer consisting of several
+ * requests to the HC.
+ * Calling such function is optional and it has positive effect of
+ * improved performance because IPC session is initiated only once.
+ *
+ * @param pipe Pipe over which the transfer will happen.
+ * @return Error code.
+ */
+void usb_pipe_start_long_transfer(usb_pipe_t *pipe)
+{
+	(void) pipe_add_ref(pipe, true);
+}
+
+/** Terminate a long transfer on a pipe.
+ *
+ * @see usb_pipe_start_long_transfer
+ *
+ * @param pipe Pipe where to end the long transfer.
+ */
+void usb_pipe_end_long_transfer(usb_pipe_t *pipe)
+{
+	pipe_drop_ref(pipe);
+}
+
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/src/pipesinit.c
===================================================================
--- uspace/lib/usbdev/src/pipesinit.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/src/pipesinit.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,531 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * Initialization of endpoint pipes.
+ *
+ */
+#include <usb/usb.h>
+#include <usb/dev/pipes.h>
+#include <usb/dev/dp.h>
+#include <usb/dev/request.h>
+#include <usbhc_iface.h>
+#include <errno.h>
+#include <assert.h>
+
+#define CTRL_PIPE_MIN_PACKET_SIZE 8
+#define DEV_DESCR_MAX_PACKET_SIZE_OFFSET 7
+
+
+#define NESTING(parentname, childname) \
+	{ \
+		.child = USB_DESCTYPE_##childname, \
+		.parent = USB_DESCTYPE_##parentname, \
+	}
+#define LAST_NESTING { -1, -1 }
+
+/** Nesting pairs of standard descriptors. */
+static usb_dp_descriptor_nesting_t descriptor_nesting[] = {
+	NESTING(CONFIGURATION, INTERFACE),
+	NESTING(INTERFACE, ENDPOINT),
+	NESTING(INTERFACE, HUB),
+	NESTING(INTERFACE, HID),
+	NESTING(HID, HID_REPORT),
+	LAST_NESTING
+};
+
+/** Tells whether given descriptor is of endpoint type.
+ *
+ * @param descriptor Descriptor in question.
+ * @return Whether the given descriptor is endpoint descriptor.
+ */
+static inline bool is_endpoint_descriptor(uint8_t *descriptor)
+{
+	return descriptor[1] == USB_DESCTYPE_ENDPOINT;
+}
+
+/** Tells whether found endpoint corresponds to endpoint described by user.
+ *
+ * @param wanted Endpoint description as entered by driver author.
+ * @param found Endpoint description obtained from endpoint descriptor.
+ * @return Whether the @p found descriptor fits the @p wanted descriptor.
+ */
+static bool endpoint_fits_description(const usb_endpoint_description_t *wanted,
+    usb_endpoint_description_t *found)
+{
+#define _SAME(fieldname) ((wanted->fieldname) == (found->fieldname))
+
+	if (!_SAME(direction)) {
+		return false;
+	}
+
+	if (!_SAME(transfer_type)) {
+		return false;
+	}
+
+	if ((wanted->interface_class >= 0) && !_SAME(interface_class)) {
+		return false;
+	}
+
+	if ((wanted->interface_subclass >= 0) && !_SAME(interface_subclass)) {
+		return false;
+	}
+
+	if ((wanted->interface_protocol >= 0) && !_SAME(interface_protocol)) {
+		return false;
+	}
+
+#undef _SAME
+
+	return true;
+}
+
+/** Find endpoint mapping for a found endpoint.
+ *
+ * @param mapping Endpoint mapping list.
+ * @param mapping_count Number of endpoint mappings in @p mapping.
+ * @param found_endpoint Description of found endpoint.
+ * @param interface_number Number of currently processed interface.
+ * @return Endpoint mapping corresponding to @p found_endpoint.
+ * @retval NULL No corresponding endpoint found.
+ */
+static usb_endpoint_mapping_t *find_endpoint_mapping(
+    usb_endpoint_mapping_t *mapping, size_t mapping_count,
+    usb_endpoint_description_t *found_endpoint,
+    int interface_number, int interface_setting)
+{
+	while (mapping_count > 0) {
+		bool interface_number_fits = (mapping->interface_no < 0)
+		    || (mapping->interface_no == interface_number);
+
+		bool interface_setting_fits = (mapping->interface_setting < 0)
+		    || (mapping->interface_setting == interface_setting);
+
+		bool endpoint_descriptions_fits = endpoint_fits_description(
+		    mapping->description, found_endpoint);
+
+		if (interface_number_fits
+		    && interface_setting_fits
+		    && endpoint_descriptions_fits) {
+			return mapping;
+		}
+
+		mapping++;
+		mapping_count--;
+	}
+	return NULL;
+}
+
+/** Process endpoint descriptor.
+ *
+ * @param mapping Endpoint mapping list.
+ * @param mapping_count Number of endpoint mappings in @p mapping.
+ * @param interface Interface descriptor under which belongs the @p endpoint.
+ * @param endpoint Endpoint descriptor.
+ * @param wire Connection backing the endpoint pipes.
+ * @return Error code.
+ */
+static int process_endpoint(
+    usb_endpoint_mapping_t *mapping, size_t mapping_count,
+    usb_standard_interface_descriptor_t *interface,
+    usb_standard_endpoint_descriptor_t *endpoint,
+    usb_device_connection_t *wire)
+{
+	usb_endpoint_description_t description;
+
+	/*
+	 * Get endpoint characteristics.
+	 */
+
+	/* Actual endpoint number is in bits 0..3 */
+	usb_endpoint_t ep_no = endpoint->endpoint_address & 0x0F;
+
+	/* Endpoint direction is set by bit 7 */
+	description.direction = (endpoint->endpoint_address & 128)
+	    ? USB_DIRECTION_IN : USB_DIRECTION_OUT;
+	/* Transfer type is in bits 0..2 and the enum values corresponds 1:1 */
+	description.transfer_type = endpoint->attributes & 3;
+
+	/*
+	 * Get interface characteristics.
+	 */
+	description.interface_class = interface->interface_class;
+	description.interface_subclass = interface->interface_subclass;
+	description.interface_protocol = interface->interface_protocol;
+
+	/*
+	 * Find the most fitting mapping and initialize the pipe.
+	 */
+	usb_endpoint_mapping_t *ep_mapping = find_endpoint_mapping(mapping,
+	    mapping_count, &description,
+	    interface->interface_number, interface->alternate_setting);
+	if (ep_mapping == NULL) {
+		return ENOENT;
+	}
+
+	if (ep_mapping->pipe == NULL) {
+		return EBADMEM;
+	}
+	if (ep_mapping->present) {
+		return EEXISTS;
+	}
+
+	int rc = usb_pipe_initialize(ep_mapping->pipe, wire,
+	    ep_no, description.transfer_type, endpoint->max_packet_size,
+	    description.direction);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	ep_mapping->present = true;
+	ep_mapping->descriptor = endpoint;
+	ep_mapping->interface = interface;
+
+	return EOK;
+}
+
+/** Process whole USB interface.
+ *
+ * @param mapping Endpoint mapping list.
+ * @param mapping_count Number of endpoint mappings in @p mapping.
+ * @param parser Descriptor parser.
+ * @param parser_data Descriptor parser data.
+ * @param interface_descriptor Interface descriptor.
+ * @return Error code.
+ */
+static int process_interface(
+    usb_endpoint_mapping_t *mapping, size_t mapping_count,
+    usb_dp_parser_t *parser, usb_dp_parser_data_t *parser_data,
+    uint8_t *interface_descriptor)
+{
+	uint8_t *descriptor = usb_dp_get_nested_descriptor(parser,
+	    parser_data, interface_descriptor);
+
+	if (descriptor == NULL) {
+		return ENOENT;
+	}
+
+	do {
+		if (is_endpoint_descriptor(descriptor)) {
+			(void) process_endpoint(mapping, mapping_count,
+			    (usb_standard_interface_descriptor_t *)
+			        interface_descriptor,
+			    (usb_standard_endpoint_descriptor_t *)
+			        descriptor,
+			    (usb_device_connection_t *) parser_data->arg);
+		}
+
+		descriptor = usb_dp_get_sibling_descriptor(parser, parser_data,
+		    interface_descriptor, descriptor);
+	} while (descriptor != NULL);
+
+	return EOK;
+}
+
+/** Initialize endpoint pipes from configuration descriptor.
+ *
+ * The mapping array is expected to conform to following rules:
+ * - @c pipe must point to already allocated structure with uninitialized pipe
+ * - @c description must point to prepared endpoint description
+ * - @c descriptor does not need to be initialized (will be overwritten)
+ * - @c interface does not need to be initialized (will be overwritten)
+ * - @c present does not need to be initialized (will be overwritten)
+ *
+ * After processing the configuration descriptor, the mapping is updated
+ * in the following fashion:
+ * - @c present will be set to @c true when the endpoint was found in the
+ *   configuration
+ * - @c descriptor will point inside the configuration descriptor to endpoint
+ *   corresponding to given description (or NULL for not found descriptor)
+ * - @c interface will point inside the configuration descriptor to interface
+ *   descriptor the endpoint @c descriptor belongs to (or NULL for not found
+ *   descriptor)
+ * - @c pipe will be initialized when found, otherwise left untouched
+ * - @c description will be untouched under all circumstances
+ *
+ * @param mapping Endpoint mapping list.
+ * @param mapping_count Number of endpoint mappings in @p mapping.
+ * @param configuration_descriptor Full configuration descriptor (is expected
+ *	to be in USB endianness: i.e. as-is after being retrieved from
+ *	the device).
+ * @param configuration_descriptor_size Size of @p configuration_descriptor
+ *	in bytes.
+ * @param connection Connection backing the endpoint pipes.
+ * @return Error code.
+ */
+int usb_pipe_initialize_from_configuration(
+    usb_endpoint_mapping_t *mapping, size_t mapping_count,
+    uint8_t *configuration_descriptor, size_t configuration_descriptor_size,
+    usb_device_connection_t *connection)
+{
+	assert(connection);
+
+	if (configuration_descriptor == NULL) {
+		return EBADMEM;
+	}
+	if (configuration_descriptor_size
+	    < sizeof(usb_standard_configuration_descriptor_t)) {
+		return ERANGE;
+	}
+
+	/*
+	 * Go through the mapping and set all endpoints to not present.
+	 */
+	size_t i;
+	for (i = 0; i < mapping_count; i++) {
+		mapping[i].present = false;
+		mapping[i].descriptor = NULL;
+		mapping[i].interface = NULL;
+	}
+
+	/*
+	 * Prepare the descriptor parser.
+	 */
+	usb_dp_parser_t dp_parser = {
+		.nesting = descriptor_nesting
+	};
+	usb_dp_parser_data_t dp_data = {
+		.data = configuration_descriptor,
+		.size = configuration_descriptor_size,
+		.arg = connection
+	};
+
+	/*
+	 * Iterate through all interfaces.
+	 */
+	uint8_t *interface = usb_dp_get_nested_descriptor(&dp_parser,
+	    &dp_data, configuration_descriptor);
+	if (interface == NULL) {
+		return ENOENT;
+	}
+	do {
+		(void) process_interface(mapping, mapping_count,
+		    &dp_parser, &dp_data,
+		    interface);
+		interface = usb_dp_get_sibling_descriptor(&dp_parser, &dp_data,
+		    configuration_descriptor, interface);
+	} while (interface != NULL);
+
+	return EOK;
+}
+
+/** Initialize USB endpoint pipe.
+ *
+ * @param pipe Endpoint pipe to be initialized.
+ * @param connection Connection to the USB device backing this pipe (the wire).
+ * @param endpoint_no Endpoint number (in USB 1.1 in range 0 to 15).
+ * @param transfer_type Transfer type (e.g. interrupt or bulk).
+ * @param max_packet_size Maximum packet size in bytes.
+ * @param direction Endpoint direction (in/out).
+ * @return Error code.
+ */
+int usb_pipe_initialize(usb_pipe_t *pipe,
+    usb_device_connection_t *connection, usb_endpoint_t endpoint_no,
+    usb_transfer_type_t transfer_type, size_t max_packet_size,
+    usb_direction_t direction)
+{
+	assert(pipe);
+	assert(connection);
+
+	fibril_mutex_initialize(&pipe->guard);
+	pipe->wire = connection;
+	pipe->hc_sess = NULL;
+	fibril_mutex_initialize(&pipe->hc_sess_mutex);
+	pipe->endpoint_no = endpoint_no;
+	pipe->transfer_type = transfer_type;
+	pipe->max_packet_size = max_packet_size;
+	pipe->direction = direction;
+	pipe->refcount = 0;
+	pipe->refcount_soft = 0;
+	pipe->auto_reset_halt = false;
+
+	return EOK;
+}
+
+
+/** Initialize USB endpoint pipe as the default zero control pipe.
+ *
+ * @param pipe Endpoint pipe to be initialized.
+ * @param connection Connection to the USB device backing this pipe (the wire).
+ * @return Error code.
+ */
+int usb_pipe_initialize_default_control(usb_pipe_t *pipe,
+    usb_device_connection_t *connection)
+{
+	assert(pipe);
+	assert(connection);
+
+	int rc = usb_pipe_initialize(pipe, connection,
+	    0, USB_TRANSFER_CONTROL, CTRL_PIPE_MIN_PACKET_SIZE,
+	    USB_DIRECTION_BOTH);
+
+	pipe->auto_reset_halt = true;
+
+	return rc;
+}
+
+/** Probe default control pipe for max packet size.
+ *
+ * The function tries to get the correct value of max packet size several
+ * time before giving up.
+ *
+ * The session on the pipe shall not be started.
+ *
+ * @param pipe Default control pipe.
+ * @return Error code.
+ */
+int usb_pipe_probe_default_control(usb_pipe_t *pipe)
+{
+	assert(pipe);
+	assert(DEV_DESCR_MAX_PACKET_SIZE_OFFSET < CTRL_PIPE_MIN_PACKET_SIZE);
+
+	if ((pipe->direction != USB_DIRECTION_BOTH) ||
+	    (pipe->transfer_type != USB_TRANSFER_CONTROL) ||
+	    (pipe->endpoint_no != 0)) {
+		return EINVAL;
+	}
+
+#define TRY_LOOP(attempt_var) \
+	for (attempt_var = 0; attempt_var < 3; attempt_var++)
+
+	size_t failed_attempts;
+	int rc;
+
+	usb_pipe_start_long_transfer(pipe);
+
+	uint8_t dev_descr_start[CTRL_PIPE_MIN_PACKET_SIZE];
+	size_t transferred_size;
+	TRY_LOOP(failed_attempts) {
+		rc = usb_request_get_descriptor(pipe, USB_REQUEST_TYPE_STANDARD,
+		    USB_REQUEST_RECIPIENT_DEVICE, USB_DESCTYPE_DEVICE,
+		    0, 0, dev_descr_start, CTRL_PIPE_MIN_PACKET_SIZE,
+		    &transferred_size);
+		if (rc == EOK) {
+			if (transferred_size != CTRL_PIPE_MIN_PACKET_SIZE) {
+				rc = ELIMIT;
+				continue;
+			}
+			break;
+		}
+	}
+	usb_pipe_end_long_transfer(pipe);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	pipe->max_packet_size
+	    = dev_descr_start[DEV_DESCR_MAX_PACKET_SIZE_OFFSET];
+
+	return EOK;
+}
+
+/** Register endpoint with the host controller.
+ *
+ * @param pipe Pipe to be registered.
+ * @param interval Polling interval.
+ * @param hc_connection Connection to the host controller (must be opened).
+ * @return Error code.
+ */
+int usb_pipe_register(usb_pipe_t *pipe,
+    unsigned int interval,
+    usb_hc_connection_t *hc_connection)
+{
+	return usb_pipe_register_with_speed(pipe, USB_SPEED_MAX + 1,
+	    interval, hc_connection);
+}
+
+/** Register endpoint with a speed at the host controller.
+ *
+ * You will rarely need to use this function because it is needed only
+ * if the registered endpoint is of address 0 and there is no other way
+ * to tell speed of the device at address 0.
+ *
+ * @param pipe Pipe to be registered.
+ * @param speed Speed of the device
+ *	(invalid speed means use previously specified one).
+ * @param interval Polling interval.
+ * @param hc_connection Connection to the host controller (must be opened).
+ * @return Error code.
+ */
+int usb_pipe_register_with_speed(usb_pipe_t *pipe, usb_speed_t speed,
+    unsigned int interval,
+    usb_hc_connection_t *hc_connection)
+{
+	assert(pipe);
+	assert(hc_connection);
+	
+	if (!usb_hc_connection_is_opened(hc_connection))
+		return EBADF;
+	
+#define _PACK2(high, low) (((high) << 16) + (low))
+#define _PACK3(high, middle, low) (((((high) << 8) + (middle)) << 8) + (low))
+	
+	async_exch_t *exch = async_exchange_begin(hc_connection->hc_sess);
+	int rc = async_req_4_0(exch, DEV_IFACE_ID(USBHC_DEV_IFACE),
+	    IPC_M_USBHC_REGISTER_ENDPOINT,
+	    _PACK2(pipe->wire->address, pipe->endpoint_no),
+	    _PACK3(speed, pipe->transfer_type, pipe->direction),
+	    _PACK2(pipe->max_packet_size, interval));
+	async_exchange_end(exch);
+	
+#undef _PACK2
+#undef _PACK3
+	
+	return rc;
+}
+
+/** Revert endpoint registration with the host controller.
+ *
+ * @param pipe Pipe to be unregistered.
+ * @param hc_connection Connection to the host controller (must be opened).
+ * @return Error code.
+ */
+int usb_pipe_unregister(usb_pipe_t *pipe,
+    usb_hc_connection_t *hc_connection)
+{
+	assert(pipe);
+	assert(hc_connection);
+	
+	if (!usb_hc_connection_is_opened(hc_connection))
+		return EBADF;
+	
+	async_exch_t *exch = async_exchange_begin(hc_connection->hc_sess);
+	int rc = async_req_4_0(exch, DEV_IFACE_ID(USBHC_DEV_IFACE),
+	    IPC_M_USBHC_UNREGISTER_ENDPOINT,
+	    pipe->wire->address, pipe->endpoint_no, pipe->direction);
+	async_exchange_end(exch);
+	
+	return rc;
+}
+
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/src/pipesio.c
===================================================================
--- uspace/lib/usbdev/src/pipesio.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/src/pipesio.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,610 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * Input and output functions (reads and writes) on endpoint pipes.
+ *
+ * Note on synchronousness of the operations: there is ABSOLUTELY NO
+ * guarantee that a call to particular function will not trigger a fibril
+ * switch.
+ *
+ * Note about the implementation: the transfer requests are always divided
+ * into two functions.
+ * The outer one does checking of input parameters (e.g. that session was
+ * already started, buffers are not NULL etc), while the inner one
+ * (with _no_checks suffix) does the actual IPC (it checks for IPC errors,
+ * obviously).
+ */
+
+#include <usb/usb.h>
+#include <usb/dev/pipes.h>
+#include <errno.h>
+#include <assert.h>
+#include <usbhc_iface.h>
+#include <usb/dev/request.h>
+#include <async.h>
+#include "pipepriv.h"
+
+/** Request an in transfer, no checking of input parameters.
+ *
+ * @param[in] pipe Pipe used for the transfer.
+ * @param[out] buffer Buffer where to store the data.
+ * @param[in] size Size of the buffer (in bytes).
+ * @param[out] size_transfered Number of bytes that were actually transfered.
+ * @return Error code.
+ */
+static int usb_pipe_read_no_checks(usb_pipe_t *pipe,
+    void *buffer, size_t size, size_t *size_transfered)
+{
+	/*
+	 * Get corresponding IPC method.
+	 * In future, replace with static array of mappings
+	 * transfer type -> method.
+	 */
+	usbhc_iface_funcs_t ipc_method;
+	switch (pipe->transfer_type) {
+		case USB_TRANSFER_INTERRUPT:
+			ipc_method = IPC_M_USBHC_INTERRUPT_IN;
+			break;
+		case USB_TRANSFER_BULK:
+			ipc_method = IPC_M_USBHC_BULK_IN;
+			break;
+		default:
+			return ENOTSUP;
+	}
+	
+	/* Ensure serialization over the phone. */
+	pipe_start_transaction(pipe);
+	async_exch_t *exch = async_exchange_begin(pipe->hc_sess);
+	
+	/*
+	 * Make call identifying target USB device and type of transfer.
+	 */
+	aid_t opening_request = async_send_3(exch, DEV_IFACE_ID(USBHC_DEV_IFACE),
+	    ipc_method, pipe->wire->address, pipe->endpoint_no, NULL);
+	
+	if (opening_request == 0) {
+		async_exchange_end(exch);
+		pipe_end_transaction(pipe);
+		return ENOMEM;
+	}
+	
+	/*
+	 * Retrieve the data.
+	 */
+	ipc_call_t data_request_call;
+	aid_t data_request = async_data_read(exch, buffer, size,
+	    &data_request_call);
+	
+	/*
+	 * Since now on, someone else might access the backing phone
+	 * without breaking the transfer IPC protocol.
+	 */
+	async_exchange_end(exch);
+	pipe_end_transaction(pipe);
+	
+	if (data_request == 0) {
+		/*
+		 * FIXME:
+		 * How to let the other side know that we want to abort?
+		 */
+		async_wait_for(opening_request, NULL);
+		return ENOMEM;
+	}
+	
+	/*
+	 * Wait for the answer.
+	 */
+	sysarg_t data_request_rc;
+	sysarg_t opening_request_rc;
+	async_wait_for(data_request, &data_request_rc);
+	async_wait_for(opening_request, &opening_request_rc);
+	
+	if (data_request_rc != EOK) {
+		/* Prefer the return code of the opening request. */
+		if (opening_request_rc != EOK) {
+			return (int) opening_request_rc;
+		} else {
+			return (int) data_request_rc;
+		}
+	}
+	if (opening_request_rc != EOK) {
+		return (int) opening_request_rc;
+	}
+	
+	*size_transfered = IPC_GET_ARG2(data_request_call);
+	
+	return EOK;
+}
+
+
+/** Request a read (in) transfer on an endpoint pipe.
+ *
+ * @param[in] pipe Pipe used for the transfer.
+ * @param[out] buffer Buffer where to store the data.
+ * @param[in] size Size of the buffer (in bytes).
+ * @param[out] size_transfered Number of bytes that were actually transfered.
+ * @return Error code.
+ */
+int usb_pipe_read(usb_pipe_t *pipe,
+    void *buffer, size_t size, size_t *size_transfered)
+{
+	assert(pipe);
+
+	if (buffer == NULL) {
+		return EINVAL;
+	}
+
+	if (size == 0) {
+		return EINVAL;
+	}
+
+	if (pipe->direction != USB_DIRECTION_IN) {
+		return EBADF;
+	}
+
+	if (pipe->transfer_type == USB_TRANSFER_CONTROL) {
+		return EBADF;
+	}
+
+	int rc;
+	rc = pipe_add_ref(pipe, false);
+	if (rc != EOK) {
+		return rc;
+	}
+
+
+	size_t act_size = 0;
+
+	rc = usb_pipe_read_no_checks(pipe, buffer, size, &act_size);
+
+	pipe_drop_ref(pipe);
+
+	if (rc != EOK) {
+		return rc;
+	}
+
+	if (size_transfered != NULL) {
+		*size_transfered = act_size;
+	}
+
+	return EOK;
+}
+
+
+
+
+/** Request an out transfer, no checking of input parameters.
+ *
+ * @param[in] pipe Pipe used for the transfer.
+ * @param[in] buffer Buffer with data to transfer.
+ * @param[in] size Size of the buffer (in bytes).
+ * @return Error code.
+ */
+static int usb_pipe_write_no_check(usb_pipe_t *pipe,
+    void *buffer, size_t size)
+{
+	/*
+	 * Get corresponding IPC method.
+	 * In future, replace with static array of mappings
+	 * transfer type -> method.
+	 */
+	usbhc_iface_funcs_t ipc_method;
+	switch (pipe->transfer_type) {
+		case USB_TRANSFER_INTERRUPT:
+			ipc_method = IPC_M_USBHC_INTERRUPT_OUT;
+			break;
+		case USB_TRANSFER_BULK:
+			ipc_method = IPC_M_USBHC_BULK_OUT;
+			break;
+		default:
+			return ENOTSUP;
+	}
+
+	/* Ensure serialization over the phone. */
+	pipe_start_transaction(pipe);
+	async_exch_t *exch = async_exchange_begin(pipe->hc_sess);
+	
+	/*
+	 * Make call identifying target USB device and type of transfer.
+	 */
+	aid_t opening_request = async_send_3(exch, DEV_IFACE_ID(USBHC_DEV_IFACE),
+	    ipc_method, pipe->wire->address, pipe->endpoint_no, NULL);
+	
+	if (opening_request == 0) {
+		async_exchange_end(exch);
+		pipe_end_transaction(pipe);
+		return ENOMEM;
+	}
+	
+	/*
+	 * Send the data.
+	 */
+	int rc = async_data_write_start(exch, buffer, size);
+	
+	/*
+	 * Since now on, someone else might access the backing phone
+	 * without breaking the transfer IPC protocol.
+	 */
+	async_exchange_end(exch);
+	pipe_end_transaction(pipe);
+	
+	if (rc != EOK) {
+		async_wait_for(opening_request, NULL);
+		return rc;
+	}
+	
+	/*
+	 * Wait for the answer.
+	 */
+	sysarg_t opening_request_rc;
+	async_wait_for(opening_request, &opening_request_rc);
+	
+	return (int) opening_request_rc;
+}
+
+/** Request a write (out) transfer on an endpoint pipe.
+ *
+ * @param[in] pipe Pipe used for the transfer.
+ * @param[in] buffer Buffer with data to transfer.
+ * @param[in] size Size of the buffer (in bytes).
+ * @return Error code.
+ */
+int usb_pipe_write(usb_pipe_t *pipe,
+    void *buffer, size_t size)
+{
+	assert(pipe);
+
+	if (buffer == NULL) {
+		return EINVAL;
+	}
+
+	if (size == 0) {
+		return EINVAL;
+	}
+
+	if (pipe->direction != USB_DIRECTION_OUT) {
+		return EBADF;
+	}
+
+	if (pipe->transfer_type == USB_TRANSFER_CONTROL) {
+		return EBADF;
+	}
+
+	int rc;
+
+	rc = pipe_add_ref(pipe, false);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	rc = usb_pipe_write_no_check(pipe, buffer, size);
+
+	pipe_drop_ref(pipe);
+
+	return rc;
+}
+
+/** Try to clear endpoint halt of default control pipe.
+ *
+ * @param pipe Pipe for control endpoint zero.
+ */
+static void clear_self_endpoint_halt(usb_pipe_t *pipe)
+{
+	assert(pipe != NULL);
+
+	if (!pipe->auto_reset_halt || (pipe->endpoint_no != 0)) {
+		return;
+	}
+
+
+	/* Prevent indefinite recursion. */
+	pipe->auto_reset_halt = false;
+	usb_request_clear_endpoint_halt(pipe, 0);
+	pipe->auto_reset_halt = true;
+}
+
+
+/** Request a control read transfer, no checking of input parameters.
+ *
+ * @param[in] pipe Pipe used for the transfer.
+ * @param[in] setup_buffer Buffer with the setup packet.
+ * @param[in] setup_buffer_size Size of the setup packet (in bytes).
+ * @param[out] data_buffer Buffer for incoming data.
+ * @param[in] data_buffer_size Size of the buffer for incoming data (in bytes).
+ * @param[out] data_transfered_size Number of bytes that were actually
+ *                                  transfered during the DATA stage.
+ * @return Error code.
+ */
+static int usb_pipe_control_read_no_check(usb_pipe_t *pipe,
+    void *setup_buffer, size_t setup_buffer_size,
+    void *data_buffer, size_t data_buffer_size, size_t *data_transfered_size)
+{
+	/* Ensure serialization over the phone. */
+	pipe_start_transaction(pipe);
+
+	/*
+	 * Make call identifying target USB device and control transfer type.
+	 */
+	async_exch_t *exch = async_exchange_begin(pipe->hc_sess);
+	aid_t opening_request = async_send_3(exch, DEV_IFACE_ID(USBHC_DEV_IFACE),
+	    IPC_M_USBHC_CONTROL_READ, pipe->wire->address, pipe->endpoint_no,
+	    NULL);
+	
+	if (opening_request == 0) {
+		async_exchange_end(exch);
+		return ENOMEM;
+	}
+	
+	/*
+	 * Send the setup packet.
+	 */
+	int rc = async_data_write_start(exch, setup_buffer, setup_buffer_size);
+	if (rc != EOK) {
+		async_exchange_end(exch);
+		pipe_end_transaction(pipe);
+		async_wait_for(opening_request, NULL);
+		return rc;
+	}
+	
+	/*
+	 * Retrieve the data.
+	 */
+	ipc_call_t data_request_call;
+	aid_t data_request = async_data_read(exch, data_buffer,
+	    data_buffer_size, &data_request_call);
+	
+	/*
+	 * Since now on, someone else might access the backing phone
+	 * without breaking the transfer IPC protocol.
+	 */
+	async_exchange_end(exch);
+	pipe_end_transaction(pipe);
+	
+	if (data_request == 0) {
+		async_wait_for(opening_request, NULL);
+		return ENOMEM;
+	}
+
+	/*
+	 * Wait for the answer.
+	 */
+	sysarg_t data_request_rc;
+	sysarg_t opening_request_rc;
+	async_wait_for(data_request, &data_request_rc);
+	async_wait_for(opening_request, &opening_request_rc);
+
+	if (data_request_rc != EOK) {
+		/* Prefer the return code of the opening request. */
+		if (opening_request_rc != EOK) {
+			return (int) opening_request_rc;
+		} else {
+			return (int) data_request_rc;
+		}
+	}
+	if (opening_request_rc != EOK) {
+		return (int) opening_request_rc;
+	}
+
+	*data_transfered_size = IPC_GET_ARG2(data_request_call);
+
+	return EOK;
+}
+
+/** Request a control read transfer on an endpoint pipe.
+ *
+ * This function encapsulates all three stages of a control transfer.
+ *
+ * @param[in] pipe Pipe used for the transfer.
+ * @param[in] setup_buffer Buffer with the setup packet.
+ * @param[in] setup_buffer_size Size of the setup packet (in bytes).
+ * @param[out] data_buffer Buffer for incoming data.
+ * @param[in] data_buffer_size Size of the buffer for incoming data (in bytes).
+ * @param[out] data_transfered_size Number of bytes that were actually
+ *                                  transfered during the DATA stage.
+ * @return Error code.
+ */
+int usb_pipe_control_read(usb_pipe_t *pipe,
+    void *setup_buffer, size_t setup_buffer_size,
+    void *data_buffer, size_t data_buffer_size, size_t *data_transfered_size)
+{
+	assert(pipe);
+
+	if ((setup_buffer == NULL) || (setup_buffer_size == 0)) {
+		return EINVAL;
+	}
+
+	if ((data_buffer == NULL) || (data_buffer_size == 0)) {
+		return EINVAL;
+	}
+
+	if ((pipe->direction != USB_DIRECTION_BOTH)
+	    || (pipe->transfer_type != USB_TRANSFER_CONTROL)) {
+		return EBADF;
+	}
+
+	int rc;
+
+	rc = pipe_add_ref(pipe, false);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	size_t act_size = 0;
+	rc = usb_pipe_control_read_no_check(pipe,
+	    setup_buffer, setup_buffer_size,
+	    data_buffer, data_buffer_size, &act_size);
+
+	if (rc == ESTALL) {
+		clear_self_endpoint_halt(pipe);
+	}
+
+	pipe_drop_ref(pipe);
+
+	if (rc != EOK) {
+		return rc;
+	}
+
+	if (data_transfered_size != NULL) {
+		*data_transfered_size = act_size;
+	}
+
+	return EOK;
+}
+
+
+/** Request a control write transfer, no checking of input parameters.
+ *
+ * @param[in] pipe Pipe used for the transfer.
+ * @param[in] setup_buffer Buffer with the setup packet.
+ * @param[in] setup_buffer_size Size of the setup packet (in bytes).
+ * @param[in] data_buffer Buffer with data to be sent.
+ * @param[in] data_buffer_size Size of the buffer with outgoing data (in bytes).
+ * @return Error code.
+ */
+static int usb_pipe_control_write_no_check(usb_pipe_t *pipe,
+    void *setup_buffer, size_t setup_buffer_size,
+    void *data_buffer, size_t data_buffer_size)
+{
+	/* Ensure serialization over the phone. */
+	pipe_start_transaction(pipe);
+
+	/*
+	 * Make call identifying target USB device and control transfer type.
+	 */
+	async_exch_t *exch = async_exchange_begin(pipe->hc_sess);
+	aid_t opening_request = async_send_4(exch, DEV_IFACE_ID(USBHC_DEV_IFACE),
+	    IPC_M_USBHC_CONTROL_WRITE, pipe->wire->address, pipe->endpoint_no,
+	    data_buffer_size, NULL);
+	
+	if (opening_request == 0) {
+		async_exchange_end(exch);
+		pipe_end_transaction(pipe);
+		return ENOMEM;
+	}
+	
+	/*
+	 * Send the setup packet.
+	 */
+	int rc = async_data_write_start(exch, setup_buffer, setup_buffer_size);
+	if (rc != EOK) {
+		async_exchange_end(exch);
+		pipe_end_transaction(pipe);
+		async_wait_for(opening_request, NULL);
+		return rc;
+	}
+	
+	/*
+	 * Send the data (if any).
+	 */
+	if (data_buffer_size > 0) {
+		rc = async_data_write_start(exch, data_buffer, data_buffer_size);
+		
+		/* All data sent, pipe can be released. */
+		async_exchange_end(exch);
+		pipe_end_transaction(pipe);
+	
+		if (rc != EOK) {
+			async_wait_for(opening_request, NULL);
+			return rc;
+		}
+	} else {
+		/* No data to send, we can release the pipe for others. */
+		async_exchange_end(exch);
+		pipe_end_transaction(pipe);
+	}
+	
+	/*
+	 * Wait for the answer.
+	 */
+	sysarg_t opening_request_rc;
+	async_wait_for(opening_request, &opening_request_rc);
+
+	return (int) opening_request_rc;
+}
+
+/** Request a control write transfer on an endpoint pipe.
+ *
+ * This function encapsulates all three stages of a control transfer.
+ *
+ * @param[in] pipe Pipe used for the transfer.
+ * @param[in] setup_buffer Buffer with the setup packet.
+ * @param[in] setup_buffer_size Size of the setup packet (in bytes).
+ * @param[in] data_buffer Buffer with data to be sent.
+ * @param[in] data_buffer_size Size of the buffer with outgoing data (in bytes).
+ * @return Error code.
+ */
+int usb_pipe_control_write(usb_pipe_t *pipe,
+    void *setup_buffer, size_t setup_buffer_size,
+    void *data_buffer, size_t data_buffer_size)
+{
+	assert(pipe);
+
+	if ((setup_buffer == NULL) || (setup_buffer_size == 0)) {
+		return EINVAL;
+	}
+
+	if ((data_buffer == NULL) && (data_buffer_size > 0)) {
+		return EINVAL;
+	}
+
+	if ((data_buffer != NULL) && (data_buffer_size == 0)) {
+		return EINVAL;
+	}
+
+	if ((pipe->direction != USB_DIRECTION_BOTH)
+	    || (pipe->transfer_type != USB_TRANSFER_CONTROL)) {
+		return EBADF;
+	}
+
+	int rc;
+
+	rc = pipe_add_ref(pipe, false);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	rc = usb_pipe_control_write_no_check(pipe,
+	    setup_buffer, setup_buffer_size, data_buffer, data_buffer_size);
+
+	if (rc == ESTALL) {
+		clear_self_endpoint_halt(pipe);
+	}
+
+	pipe_drop_ref(pipe);
+
+	return rc;
+}
+
+
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/src/recognise.c
===================================================================
--- uspace/lib/usbdev/src/recognise.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/src/recognise.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,442 @@
+/*
+ * Copyright (c) 2010 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * Functions for recognition of attached devices.
+ */
+#include <sys/types.h>
+#include <fibril_synch.h>
+#include <usb/dev/pipes.h>
+#include <usb/dev/recognise.h>
+#include <usb/ddfiface.h>
+#include <usb/dev/request.h>
+#include <usb/classes/classes.h>
+#include <stdio.h>
+#include <errno.h>
+#include <assert.h>
+
+/** Index to append after device name for uniqueness. */
+static size_t device_name_index = 0;
+/** Mutex guard for device_name_index. */
+static FIBRIL_MUTEX_INITIALIZE(device_name_index_mutex);
+
+/** DDF operations of child devices. */
+ddf_dev_ops_t child_ops = {
+	.interfaces[USB_DEV_IFACE] = &usb_iface_hub_child_impl
+};
+
+/** Get integer part from BCD coded number. */
+#define BCD_INT(a) (((unsigned int)(a)) / 256)
+/** Get fraction part from BCD coded number (as an integer, no less). */
+#define BCD_FRAC(a) (((unsigned int)(a)) % 256)
+
+/** Format for BCD coded number to be used in printf. */
+#define BCD_FMT "%x.%x"
+/** Arguments to printf for BCD coded number. */
+#define BCD_ARGS(a) BCD_INT((a)), BCD_FRAC((a))
+
+/* FIXME: make this dynamic */
+#define MATCH_STRING_MAX 256
+
+/** Add formatted match id.
+ *
+ * @param matches List of match ids where to add to.
+ * @param score Score of the match.
+ * @param format Printf-like format
+ * @return Error code.
+ */
+static int usb_add_match_id(match_id_list_t *matches, int score,
+    const char *format, ...)
+{
+	char *match_str = NULL;
+	match_id_t *match_id = NULL;
+	int rc;
+	
+	match_str = malloc(MATCH_STRING_MAX + 1);
+	if (match_str == NULL) {
+		rc = ENOMEM;
+		goto failure;
+	}
+
+	/*
+	 * FIXME: replace with dynamic allocation of exact size
+	 */
+	va_list args;
+	va_start(args, format	);
+	vsnprintf(match_str, MATCH_STRING_MAX, format, args);
+	match_str[MATCH_STRING_MAX] = 0;
+	va_end(args);
+
+	match_id = create_match_id();
+	if (match_id == NULL) {
+		rc = ENOMEM;
+		goto failure;
+	}
+
+	match_id->id = match_str;
+	match_id->score = score;
+	add_match_id(matches, match_id);
+
+	return EOK;
+	
+failure:
+	if (match_str != NULL) {
+		free(match_str);
+	}
+	if (match_id != NULL) {
+		match_id->id = NULL;
+		delete_match_id(match_id);
+	}
+	
+	return rc;
+}
+
+/** Add match id to list or return with error code.
+ *
+ * @param match_ids List of match ids.
+ * @param score Match id score.
+ * @param format Format of the matching string
+ * @param ... Arguments for the format.
+ */
+#define ADD_MATCHID_OR_RETURN(match_ids, score, format, ...) \
+	do { \
+		int __rc = usb_add_match_id((match_ids), (score), \
+		    format, ##__VA_ARGS__); \
+		if (__rc != EOK) { \
+			return __rc; \
+		} \
+	} while (0)
+
+/** Create device match ids based on its interface.
+ *
+ * @param[in] desc_device Device descriptor.
+ * @param[in] desc_interface Interface descriptor.
+ * @param[out] matches Initialized list of match ids.
+ * @return Error code (the two mentioned are not the only ones).
+ * @retval EINVAL Invalid input parameters (expects non NULL pointers).
+ * @retval ENOENT Device class is not "use interface".
+ */
+int usb_device_create_match_ids_from_interface(
+    const usb_standard_device_descriptor_t *desc_device,
+    const usb_standard_interface_descriptor_t *desc_interface,
+    match_id_list_t *matches)
+{
+	if (desc_interface == NULL) {
+		return EINVAL;
+	}
+	if (matches == NULL) {
+		return EINVAL;
+	}
+
+	if (desc_interface->interface_class == USB_CLASS_USE_INTERFACE) {
+		return ENOENT;
+	}
+
+	const char *classname = usb_str_class(desc_interface->interface_class);
+	assert(classname != NULL);
+
+#define IFACE_PROTOCOL_FMT "interface&class=%s&subclass=0x%02x&protocol=0x%02x"
+#define IFACE_PROTOCOL_ARGS classname, desc_interface->interface_subclass, \
+    desc_interface->interface_protocol
+
+#define IFACE_SUBCLASS_FMT "interface&class=%s&subclass=0x%02x"
+#define IFACE_SUBCLASS_ARGS classname, desc_interface->interface_subclass
+
+#define IFACE_CLASS_FMT "interface&class=%s"
+#define IFACE_CLASS_ARGS classname
+
+#define VENDOR_RELEASE_FMT "vendor=0x%04x&product=0x%04x&release=" BCD_FMT
+#define VENDOR_RELEASE_ARGS desc_device->vendor_id, desc_device->product_id, \
+    BCD_ARGS(desc_device->device_version)
+
+#define VENDOR_PRODUCT_FMT "vendor=0x%04x&product=0x%04x"
+#define VENDOR_PRODUCT_ARGS desc_device->vendor_id, desc_device->product_id
+
+#define VENDOR_ONLY_FMT "vendor=0x%04x"
+#define VENDOR_ONLY_ARGS desc_device->vendor_id
+
+	/*
+	 * If the vendor is specified, create match ids with vendor with
+	 * higher score.
+	 * Then the same ones without the vendor part.
+	 */
+	if ((desc_device != NULL) && (desc_device->vendor_id != 0)) {
+		/* First, interface matches with device release number. */
+		ADD_MATCHID_OR_RETURN(matches, 250,
+		    "usb&" VENDOR_RELEASE_FMT "&" IFACE_PROTOCOL_FMT,
+		    VENDOR_RELEASE_ARGS, IFACE_PROTOCOL_ARGS);
+		ADD_MATCHID_OR_RETURN(matches, 240,
+		    "usb&" VENDOR_RELEASE_FMT "&" IFACE_SUBCLASS_FMT,
+		    VENDOR_RELEASE_ARGS, IFACE_SUBCLASS_ARGS);
+		ADD_MATCHID_OR_RETURN(matches, 230,
+		    "usb&" VENDOR_RELEASE_FMT "&" IFACE_CLASS_FMT,
+		    VENDOR_RELEASE_ARGS, IFACE_CLASS_ARGS);
+
+		/* Next, interface matches without release number. */
+		ADD_MATCHID_OR_RETURN(matches, 220,
+		    "usb&" VENDOR_PRODUCT_FMT "&" IFACE_PROTOCOL_FMT,
+		    VENDOR_PRODUCT_ARGS, IFACE_PROTOCOL_ARGS);
+		ADD_MATCHID_OR_RETURN(matches, 210,
+		    "usb&" VENDOR_PRODUCT_FMT "&" IFACE_SUBCLASS_FMT,
+		    VENDOR_PRODUCT_ARGS, IFACE_SUBCLASS_ARGS);
+		ADD_MATCHID_OR_RETURN(matches, 200,
+		    "usb&" VENDOR_PRODUCT_FMT "&" IFACE_CLASS_FMT,
+		    VENDOR_PRODUCT_ARGS, IFACE_CLASS_ARGS);
+
+		/* Finally, interface matches with only vendor. */
+		ADD_MATCHID_OR_RETURN(matches, 190,
+		    "usb&" VENDOR_ONLY_FMT "&" IFACE_PROTOCOL_FMT,
+		    VENDOR_ONLY_ARGS, IFACE_PROTOCOL_ARGS);
+		ADD_MATCHID_OR_RETURN(matches, 180,
+		    "usb&" VENDOR_ONLY_FMT "&" IFACE_SUBCLASS_FMT,
+		    VENDOR_ONLY_ARGS, IFACE_SUBCLASS_ARGS);
+		ADD_MATCHID_OR_RETURN(matches, 170,
+		    "usb&" VENDOR_ONLY_FMT "&" IFACE_CLASS_FMT,
+		    VENDOR_ONLY_ARGS, IFACE_CLASS_ARGS);
+	}
+
+	/* Now, the same but without any vendor specification. */
+	ADD_MATCHID_OR_RETURN(matches, 160,
+	    "usb&" IFACE_PROTOCOL_FMT,
+	    IFACE_PROTOCOL_ARGS);
+	ADD_MATCHID_OR_RETURN(matches, 150,
+	    "usb&" IFACE_SUBCLASS_FMT,
+	    IFACE_SUBCLASS_ARGS);
+	ADD_MATCHID_OR_RETURN(matches, 140,
+	    "usb&" IFACE_CLASS_FMT,
+	    IFACE_CLASS_ARGS);
+
+#undef IFACE_PROTOCOL_FMT
+#undef IFACE_PROTOCOL_ARGS
+#undef IFACE_SUBCLASS_FMT
+#undef IFACE_SUBCLASS_ARGS
+#undef IFACE_CLASS_FMT
+#undef IFACE_CLASS_ARGS
+#undef VENDOR_RELEASE_FMT
+#undef VENDOR_RELEASE_ARGS
+#undef VENDOR_PRODUCT_FMT
+#undef VENDOR_PRODUCT_ARGS
+#undef VENDOR_ONLY_FMT
+#undef VENDOR_ONLY_ARGS
+
+	/* As a last resort, try fallback driver. */
+	ADD_MATCHID_OR_RETURN(matches, 10, "usb&interface&fallback");
+
+	return EOK;
+}
+
+/** Create DDF match ids from USB device descriptor.
+ *
+ * @param matches List of match ids to extend.
+ * @param device_descriptor Device descriptor returned by given device.
+ * @return Error code.
+ */
+int usb_device_create_match_ids_from_device_descriptor(
+    const usb_standard_device_descriptor_t *device_descriptor,
+    match_id_list_t *matches)
+{
+	/*
+	 * Unless the vendor id is 0, the pair idVendor-idProduct
+	 * quite uniquely describes the device.
+	 */
+	if (device_descriptor->vendor_id != 0) {
+		/* First, with release number. */
+		ADD_MATCHID_OR_RETURN(matches, 100,
+		    "usb&vendor=0x%04x&product=0x%04x&release=" BCD_FMT,
+		    (int) device_descriptor->vendor_id,
+		    (int) device_descriptor->product_id,
+		    BCD_ARGS(device_descriptor->device_version));
+		
+		/* Next, without release number. */
+		ADD_MATCHID_OR_RETURN(matches, 90,
+		    "usb&vendor=0x%04x&product=0x%04x",
+		    (int) device_descriptor->vendor_id,
+		    (int) device_descriptor->product_id);
+	}	
+
+	/*
+	 * If the device class points to interface we skip adding
+	 * class directly but we add a multi interface device.
+	 */
+	if (device_descriptor->device_class != USB_CLASS_USE_INTERFACE) {
+		ADD_MATCHID_OR_RETURN(matches, 50, "usb&class=%s",
+		    usb_str_class(device_descriptor->device_class));
+	} else {
+		ADD_MATCHID_OR_RETURN(matches, 50, "usb&mid");
+	}
+	
+	/* As a last resort, try fallback driver. */
+	ADD_MATCHID_OR_RETURN(matches, 10, "usb&fallback");
+
+	return EOK;
+}
+
+
+/** Create match ids describing attached device.
+ *
+ * @warning The list of match ids @p matches may change even when
+ * function exits with error.
+ *
+ * @param ctrl_pipe Control pipe to given device (session must be already
+ *	started).
+ * @param matches Initialized list of match ids.
+ * @return Error code.
+ */
+int usb_device_create_match_ids(usb_pipe_t *ctrl_pipe,
+    match_id_list_t *matches)
+{
+	int rc;
+	/*
+	 * Retrieve device descriptor and add matches from it.
+	 */
+	usb_standard_device_descriptor_t device_descriptor;
+
+	rc = usb_request_get_device_descriptor(ctrl_pipe, &device_descriptor);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	rc = usb_device_create_match_ids_from_device_descriptor(
+	    &device_descriptor, matches);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	return EOK;
+}
+
+/** Probe for device kind and register it in devman.
+ *
+ * @param[in] address Address of the (unknown) attached device.
+ * @param[in] hc_handle Handle of the host controller.
+ * @param[in] parent Parent device.
+ * @param[out] child_handle Handle of the child device.
+ * @param[in] dev_ops Child device ops.
+ * @param[in] dev_data Arbitrary pointer to be stored in the child
+ *	as @c driver_data.
+ * @param[out] child_fun Storage where pointer to allocated child function
+ *	will be written.
+ * @return Error code.
+ */
+int usb_device_register_child_in_devman(usb_address_t address,
+    devman_handle_t hc_handle,
+    ddf_dev_t *parent, devman_handle_t *child_handle,
+    ddf_dev_ops_t *dev_ops, void *dev_data, ddf_fun_t **child_fun)
+{
+	size_t this_device_name_index;
+
+	fibril_mutex_lock(&device_name_index_mutex);
+	this_device_name_index = device_name_index;
+	device_name_index++;
+	fibril_mutex_unlock(&device_name_index_mutex);
+
+	ddf_fun_t *child = NULL;
+	char *child_name = NULL;
+	int rc;
+	usb_device_connection_t dev_connection;
+	usb_pipe_t ctrl_pipe;
+
+	rc = usb_device_connection_initialize(&dev_connection, hc_handle, address);
+	if (rc != EOK) {
+		goto failure;
+	}
+
+	rc = usb_pipe_initialize_default_control(&ctrl_pipe,
+	    &dev_connection);
+	if (rc != EOK) {
+		goto failure;
+	}
+	rc = usb_pipe_probe_default_control(&ctrl_pipe);
+	if (rc != EOK) {
+		goto failure;
+	}
+
+	/*
+	 * TODO: Once the device driver framework support persistent
+	 * naming etc., something more descriptive could be created.
+	 */
+	rc = asprintf(&child_name, "usb%02zu_a%d",
+	    this_device_name_index, address);
+	if (rc < 0) {
+		goto failure;
+	}
+
+	child = ddf_fun_create(parent, fun_inner, child_name);
+	if (child == NULL) {
+		rc = ENOMEM;
+		goto failure;
+	}
+
+	if (dev_ops != NULL) {
+		child->ops = dev_ops;
+	} else {
+		child->ops = &child_ops;
+	}
+
+	child->driver_data = dev_data;
+
+	rc = usb_device_create_match_ids(&ctrl_pipe, &child->match_ids);
+	if (rc != EOK) {
+		goto failure;
+	}
+
+	rc = ddf_fun_bind(child);
+	if (rc != EOK) {
+		goto failure;
+	}
+
+	if (child_handle != NULL) {
+		*child_handle = child->handle;
+	}
+
+	if (child_fun != NULL) {
+		*child_fun = child;
+	}
+
+	return EOK;
+
+failure:
+	if (child != NULL) {
+		child->name = NULL;
+		/* This takes care of match_id deallocation as well. */
+		ddf_fun_destroy(child);
+	}
+	if (child_name != NULL) {
+		free(child_name);
+	}
+
+	return rc;
+}
+
+
+/**
+ * @}
+ */
Index: uspace/lib/usbdev/src/request.c
===================================================================
--- uspace/lib/usbdev/src/request.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbdev/src/request.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,930 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbdev
+ * @{
+ */
+/** @file
+ * Standard USB requests (implementation).
+ */
+#include <usb/dev/request.h>
+#include <errno.h>
+#include <assert.h>
+#include <usb/debug.h>
+
+#define MAX_DATA_LENGTH ((size_t)(0xFFFF))
+
+/** Generic wrapper for SET requests using standard control request format.
+ *
+ * @see usb_pipe_control_write
+ *
+ * @param pipe Pipe used for the communication.
+ * @param request_type Request type (standard/class/vendor).
+ * @param recipient Request recipient (e.g. device or endpoint).
+ * @param request Actual request (e.g. GET_DESCRIPTOR).
+ * @param value Value of @c wValue field of setup packet
+ * 	(must be in USB endianness).
+ * @param index Value of @c wIndex field of setup packet
+ * 	(must be in USB endianness).
+ * @param data Data to be sent during DATA stage
+ * 	(expected to be in USB endianness).
+ * @param data_size Size of the @p data buffer (in native endianness).
+ * @return Error code.
+ * @retval EBADMEM @p pipe is NULL.
+ * @retval EBADMEM @p data is NULL and @p data_size is not zero.
+ * @retval ERANGE Data buffer too large.
+ */
+int usb_control_request_set(usb_pipe_t *pipe,
+    usb_request_type_t request_type, usb_request_recipient_t recipient,
+    uint8_t request,
+    uint16_t value, uint16_t index,
+    void *data, size_t data_size)
+{
+	if (pipe == NULL) {
+		return EBADMEM;
+	}
+
+	if (data_size > MAX_DATA_LENGTH) {
+		return ERANGE;
+	}
+
+	if ((data_size > 0) && (data == NULL)) {
+		return EBADMEM;
+	}
+
+	/*
+	 * TODO: check that @p request_type and @p recipient are
+	 * within ranges.
+	 */
+
+	usb_device_request_setup_packet_t setup_packet;
+	setup_packet.request_type = (request_type << 5) | recipient;
+	setup_packet.request = request;
+	setup_packet.value = value;
+	setup_packet.index = index;
+	setup_packet.length = (uint16_t) data_size;
+
+	int rc = usb_pipe_control_write(pipe,
+	    &setup_packet, sizeof(setup_packet),
+	    data, data_size);
+
+	return rc;
+}
+
+ /** Generic wrapper for GET requests using standard control request format.
+  *
+  * @see usb_pipe_control_read
+  *
+  * @param pipe Pipe used for the communication.
+  * @param request_type Request type (standard/class/vendor).
+  * @param recipient Request recipient (e.g. device or endpoint).
+  * @param request Actual request (e.g. GET_DESCRIPTOR).
+  * @param value Value of @c wValue field of setup packet
+  * 	(must be in USB endianness).
+  * @param index Value of @c wIndex field of setup packet
+  *	(must be in USB endianness).
+  * @param data Buffer where to store data accepted during the DATA stage.
+  *	(they will come in USB endianness).
+  * @param data_size Size of the @p data buffer
+  * 	(in native endianness).
+  * @param actual_data_size Actual size of transfered data
+  * 	(in native endianness).
+  * @return Error code.
+  * @retval EBADMEM @p pipe is NULL.
+  * @retval EBADMEM @p data is NULL and @p data_size is not zero.
+  * @retval ERANGE Data buffer too large.
+  */
+int usb_control_request_get(usb_pipe_t *pipe,
+    usb_request_type_t request_type, usb_request_recipient_t recipient,
+    uint8_t request,
+    uint16_t value, uint16_t index,
+    void *data, size_t data_size, size_t *actual_data_size)
+{
+	if (pipe == NULL) {
+		return EBADMEM;
+	}
+
+	if (data_size > MAX_DATA_LENGTH) {
+		return ERANGE;
+	}
+
+	if ((data_size > 0) && (data == NULL)) {
+		return EBADMEM;
+	}
+
+	/*
+	 * TODO: check that @p request_type and @p recipient are
+	 * within ranges.
+	 */
+
+	usb_device_request_setup_packet_t setup_packet;
+	setup_packet.request_type = 128 | (request_type << 5) | recipient;
+	setup_packet.request = request;
+	setup_packet.value = value;
+	setup_packet.index = index;
+	setup_packet.length = (uint16_t) data_size;
+
+	int rc = usb_pipe_control_read(pipe,
+	    &setup_packet, sizeof(setup_packet),
+	    data, data_size, actual_data_size);
+
+	return rc;
+}
+
+/** Retrieve status of a USB device.
+ *
+ * @param[in] pipe Control endpoint pipe (session must be already started).
+ * @param[in] index Recipient index (in native endianness).
+ * @param[in] recipient Recipient of the GET_STATUS request.
+ * @param[out] status Recipient status (in native endianness).
+ * @return Error code.
+ */
+int usb_request_get_status(usb_pipe_t *pipe,
+    usb_request_recipient_t recipient, uint16_t index,
+    uint16_t *status)
+{
+	if ((recipient == USB_REQUEST_RECIPIENT_DEVICE) && (index != 0)) {
+		return EINVAL;
+	}
+
+	if (status == NULL) {
+		return EBADMEM;
+	}
+
+	uint16_t status_usb_endianess;
+	size_t data_transfered_size;
+	int rc = usb_control_request_get(pipe, USB_REQUEST_TYPE_STANDARD,
+	    recipient, USB_DEVREQ_GET_STATUS, 0, uint16_host2usb(index),
+	    &status_usb_endianess, 2, &data_transfered_size);
+	if (rc != EOK) {
+		return rc;
+	}
+	if (data_transfered_size != 2) {
+		return ELIMIT;
+	}
+
+	*status = uint16_usb2host(status_usb_endianess);
+
+	return EOK;
+}
+
+/** Clear or disable specific device feature.
+ *
+ * @param[in] pipe Control endpoint pipe (session must be already started).
+ * @param[in] request_type Request type (standard/class/vendor).
+ * @param[in] recipient Recipient of the CLEAR_FEATURE request.
+ * @param[in] feature_selector Feature selector (in native endianness).
+ * @param[in] index Recipient index (in native endianness).
+ * @return Error code.
+ */
+int usb_request_clear_feature(usb_pipe_t *pipe,
+    usb_request_type_t request_type, usb_request_recipient_t recipient,
+    uint16_t feature_selector, uint16_t index)
+{
+	if (request_type == USB_REQUEST_TYPE_STANDARD) {
+		if ((recipient == USB_REQUEST_RECIPIENT_DEVICE)
+		    && (index != 0)) {
+			return EINVAL;
+		}
+	}
+
+	int rc = usb_control_request_set(pipe, request_type, recipient,
+	    USB_DEVREQ_CLEAR_FEATURE,
+	    uint16_host2usb(feature_selector), uint16_host2usb(index),
+	    NULL, 0);
+
+	return rc;
+}
+
+/** Set or enable specific device feature.
+ *
+ * @param[in] pipe Control endpoint pipe (session must be already started).
+ * @param[in] request_type Request type (standard/class/vendor).
+ * @param[in] recipient Recipient of the SET_FEATURE request.
+ * @param[in] feature_selector Feature selector (in native endianness).
+ * @param[in] index Recipient index (in native endianness).
+ * @return Error code.
+ */
+int usb_request_set_feature(usb_pipe_t *pipe,
+    usb_request_type_t request_type, usb_request_recipient_t recipient,
+    uint16_t feature_selector, uint16_t index)
+{
+	if (request_type == USB_REQUEST_TYPE_STANDARD) {
+		if ((recipient == USB_REQUEST_RECIPIENT_DEVICE)
+		    && (index != 0)) {
+			return EINVAL;
+		}
+	}
+
+	int rc = usb_control_request_set(pipe, request_type, recipient,
+	    USB_DEVREQ_SET_FEATURE,
+	    uint16_host2usb(feature_selector), uint16_host2usb(index),
+	    NULL, 0);
+
+	return rc;
+}
+
+/** Change address of connected device.
+ * This function automatically updates the backing connection to point to
+ * the new address.
+ *
+ * @param pipe Control endpoint pipe (session must be already started).
+ * @param new_address New USB address to be set (in native endianness).
+ * @return Error code.
+ */
+int usb_request_set_address(usb_pipe_t *pipe,
+    usb_address_t new_address)
+{
+	if ((new_address < 0) || (new_address >= USB11_ADDRESS_MAX)) {
+		return EINVAL;
+	}
+
+	uint16_t addr = uint16_host2usb((uint16_t)new_address);
+
+	int rc = usb_control_request_set(pipe,
+	    USB_REQUEST_TYPE_STANDARD, USB_REQUEST_RECIPIENT_DEVICE,
+	    USB_DEVREQ_SET_ADDRESS,
+	    addr, 0,
+	    NULL, 0);
+
+	if (rc != EOK) {
+		return rc;
+	}
+
+	assert(pipe->wire != NULL);
+	/* TODO: prevent other from accessing wire now. */
+	pipe->wire->address = new_address;
+
+	return EOK;
+}
+
+/** Retrieve USB descriptor of a USB device.
+ *
+ * @param[in] pipe Control endpoint pipe (session must be already started).
+ * @param[in] request_type Request type (standard/class/vendor).
+ * @param[in] recipient Request recipient (device/interface/endpoint).
+ * @param[in] descriptor_type Descriptor type (device/configuration/HID/...).
+ * @param[in] descriptor_index Descriptor index.
+ * @param[in] language Language index.
+ * @param[out] buffer Buffer where to store the retrieved descriptor.
+ * @param[in] size Size of the @p buffer.
+ * @param[out] actual_size Number of bytes actually transferred.
+ * @return Error code.
+ */
+int usb_request_get_descriptor(usb_pipe_t *pipe,
+    usb_request_type_t request_type, usb_request_recipient_t recipient,
+    uint8_t descriptor_type, uint8_t descriptor_index,
+    uint16_t language,
+    void *buffer, size_t size, size_t *actual_size)
+{
+	if (buffer == NULL) {
+		return EBADMEM;
+	}
+	if (size == 0) {
+		return EINVAL;
+	}
+
+	uint16_t wValue = descriptor_index | (descriptor_type << 8);
+
+	return usb_control_request_get(pipe,
+	    request_type, recipient,
+	    USB_DEVREQ_GET_DESCRIPTOR,
+	    wValue, language,
+	    buffer, size, actual_size);
+}
+
+/** Retrieve USB descriptor, allocate space for it.
+ *
+ * @param[in] pipe Control endpoint pipe (session must be already started).
+ * @param[in] request_type Request type (standard/class/vendor).
+ * @param[in] recipient Request recipient (device/interface/endpoint).
+ * @param[in] descriptor_type Descriptor type (device/configuration/HID/...).
+ * @param[in] descriptor_index Descriptor index.
+ * @param[in] language Language index.
+ * @param[out] buffer_ptr Where to store pointer to allocated buffer.
+ * @param[out] buffer_size Where to store the size of the descriptor.
+ * @return
+ */
+int usb_request_get_descriptor_alloc(usb_pipe_t * pipe,
+    usb_request_type_t request_type, usb_request_recipient_t recipient,
+    uint8_t descriptor_type, uint8_t descriptor_index,
+    uint16_t language,
+    void **buffer_ptr, size_t *buffer_size)
+{
+	if (buffer_ptr == NULL) {
+		return EBADMEM;
+	}
+
+	int rc;
+
+	/*
+	 * Get only first byte to retrieve descriptor length.
+	 */
+	uint8_t tmp_buffer[1];
+	size_t bytes_transfered;
+	rc = usb_request_get_descriptor(pipe, request_type, recipient,
+	    descriptor_type, descriptor_index, language,
+	    &tmp_buffer, 1, &bytes_transfered);
+	if (rc != EOK) {
+		return rc;
+	}
+	if (bytes_transfered != 1) {
+		/* FIXME: some better error code? */
+		return ESTALL;
+	}
+
+	size_t size = tmp_buffer[0];
+	if (size == 0) {
+		/* FIXME: some better error code? */
+		return ESTALL;
+	}
+
+	/*
+	 * Allocate buffer and get the descriptor again.
+	 */
+	void *buffer = malloc(size);
+	if (buffer == NULL) {
+		return ENOMEM;
+	}
+
+	rc = usb_request_get_descriptor(pipe, request_type, recipient,
+	    descriptor_type, descriptor_index, language,
+	    buffer, size, &bytes_transfered);
+	if (rc != EOK) {
+		free(buffer);
+		return rc;
+	}
+	if (bytes_transfered != size) {
+		free(buffer);
+		/* FIXME: some better error code? */
+		return ESTALL;
+	}
+
+	*buffer_ptr = buffer;
+	if (buffer_size != NULL) {
+		*buffer_size = size;
+	}
+
+	return EOK;
+}
+
+/** Retrieve standard device descriptor of a USB device.
+ *
+ * @param[in] pipe Control endpoint pipe (session must be already started).
+ * @param[out] descriptor Storage for the device descriptor.
+ * @return Error code.
+ */
+int usb_request_get_device_descriptor(usb_pipe_t *pipe,
+    usb_standard_device_descriptor_t *descriptor)
+{
+	if (descriptor == NULL) {
+		return EBADMEM;
+	}
+
+	size_t actually_transferred = 0;
+	usb_standard_device_descriptor_t descriptor_tmp;
+	int rc = usb_request_get_descriptor(pipe,
+	    USB_REQUEST_TYPE_STANDARD, USB_REQUEST_RECIPIENT_DEVICE, 
+	    USB_DESCTYPE_DEVICE, 0, 0,
+	    &descriptor_tmp, sizeof(descriptor_tmp),
+	    &actually_transferred);
+
+	if (rc != EOK) {
+		return rc;
+	}
+
+	/* Verify that all data has been transferred. */
+	if (actually_transferred < sizeof(descriptor_tmp)) {
+		return ELIMIT;
+	}
+
+	/* Everything is okay, copy the descriptor. */
+	memcpy(descriptor, &descriptor_tmp,
+	    sizeof(descriptor_tmp));
+
+	return EOK;
+}
+
+/** Retrieve configuration descriptor of a USB device.
+ *
+ * The function does not retrieve additional data binded with configuration
+ * descriptor (such as its interface and endpoint descriptors) - use
+ * usb_request_get_full_configuration_descriptor() instead.
+ *
+ * @param[in] pipe Control endpoint pipe (session must be already started).
+ * @param[in] index Descriptor index.
+ * @param[out] descriptor Storage for the device descriptor.
+ * @return Error code.
+ */
+int usb_request_get_bare_configuration_descriptor(usb_pipe_t *pipe,
+    int index, usb_standard_configuration_descriptor_t *descriptor)
+{
+	if (descriptor == NULL) {
+		return EBADMEM;
+	}
+
+	if ((index < 0) || (index > 0xFF)) {
+		return ERANGE;
+	}
+
+	size_t actually_transferred = 0;
+	usb_standard_configuration_descriptor_t descriptor_tmp;
+	int rc = usb_request_get_descriptor(pipe,
+	    USB_REQUEST_TYPE_STANDARD, USB_REQUEST_RECIPIENT_DEVICE,
+	    USB_DESCTYPE_CONFIGURATION, index, 0,
+	    &descriptor_tmp, sizeof(descriptor_tmp),
+	    &actually_transferred);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	/* Verify that all data has been transferred. */
+	if (actually_transferred < sizeof(descriptor_tmp)) {
+		return ELIMIT;
+	}
+
+	/* Everything is okay, copy the descriptor. */
+	memcpy(descriptor, &descriptor_tmp,
+	    sizeof(descriptor_tmp));
+
+	return EOK;
+}
+
+/** Retrieve full configuration descriptor of a USB device.
+ *
+ * @warning The @p buffer might be touched (i.e. its contents changed)
+ * even when error occurs.
+ *
+ * @param[in] pipe Control endpoint pipe (session must be already started).
+ * @param[in] index Descriptor index.
+ * @param[out] descriptor Storage for the device descriptor.
+ * @param[in] descriptor_size Size of @p descriptor buffer.
+ * @param[out] actual_size Number of bytes actually transferred.
+ * @return Error code.
+ */
+int usb_request_get_full_configuration_descriptor(usb_pipe_t *pipe,
+    int index, void *descriptor, size_t descriptor_size, size_t *actual_size)
+{
+	if ((index < 0) || (index > 0xFF)) {
+		return ERANGE;
+	}
+
+	return usb_request_get_descriptor(pipe,
+	    USB_REQUEST_TYPE_STANDARD, USB_REQUEST_RECIPIENT_DEVICE,
+	    USB_DESCTYPE_CONFIGURATION, index, 0,
+	    descriptor, descriptor_size, actual_size);
+}
+
+/** Retrieve full configuration descriptor, allocate space for it.
+ *
+ * The function takes care that full configuration descriptor is returned
+ * (i.e. the function will fail when less data then descriptor.totalLength
+ * is returned).
+ *
+ * @param[in] pipe Control endpoint pipe (session must be already started).
+ * @param[in] index Configuration index.
+ * @param[out] descriptor_ptr Where to store pointer to allocated buffer.
+ * @param[out] descriptor_size Where to store the size of the descriptor.
+ * @return Error code.
+ */
+int usb_request_get_full_configuration_descriptor_alloc(
+    usb_pipe_t *pipe, int index,
+    void **descriptor_ptr, size_t *descriptor_size)
+{
+	int rc;
+
+	if (descriptor_ptr == NULL) {
+		return EBADMEM;
+	}
+
+	usb_standard_configuration_descriptor_t bare_config;
+	rc = usb_request_get_bare_configuration_descriptor(pipe, index,
+	    &bare_config);
+	if (rc != EOK) {
+		return rc;
+	}
+	if (bare_config.descriptor_type != USB_DESCTYPE_CONFIGURATION) {
+		return ENOENT;
+	}
+	if (bare_config.total_length < sizeof(bare_config)) {
+		return ELIMIT;
+	}
+
+	void *buffer = malloc(bare_config.total_length);
+	if (buffer == NULL) {
+		return ENOMEM;
+	}
+
+	size_t transferred = 0;
+	rc = usb_request_get_full_configuration_descriptor(pipe, index,
+	    buffer, bare_config.total_length, &transferred);
+	if (rc != EOK) {
+		free(buffer);
+		return rc;
+	}
+
+	if (transferred != bare_config.total_length) {
+		free(buffer);
+		return ELIMIT;
+	}
+
+	/* Everything looks okay, copy the pointers. */
+
+	*descriptor_ptr = buffer;
+
+	if (descriptor_size != NULL) {
+		*descriptor_size = bare_config.total_length;
+	}
+
+	return EOK;
+}
+
+/** Update existing or add new USB descriptor to a USB device.
+ *
+ * @param[in] pipe Control endpoint pipe (session must be already started).
+ * @param[in] request_type Request type (standard/class/vendor).
+ * @param[in] recipient Request recipient (device/interface/endpoint).
+ * @param[in] descriptor_type Descriptor type (device/configuration/HID/...).
+ * @param[in] descriptor_index Descriptor index.
+ * @param[in] language Language index (in native endianness).
+ * @param[in] buffer Buffer with the new descriptor (in USB endianness).
+ * @param[in] size Size of the @p buffer in bytes (in native endianness).
+ * @return Error code.
+ */
+int usb_request_set_descriptor(usb_pipe_t *pipe,
+    usb_request_type_t request_type, usb_request_recipient_t recipient,
+    uint8_t descriptor_type, uint8_t descriptor_index,
+    uint16_t language,
+    void *buffer, size_t size)
+{
+	if (buffer == NULL) {
+		return EBADMEM;
+	}
+	if (size == 0) {
+		return EINVAL;
+	}
+
+	/* FIXME: proper endianness. */
+	uint16_t wValue = descriptor_index | (descriptor_type << 8);
+
+	return usb_control_request_set(pipe,
+	    request_type, recipient,
+	    USB_DEVREQ_SET_DESCRIPTOR,
+	    wValue, language,
+	    buffer, size);
+}
+
+/** Get current configuration value of USB device.
+ *
+ * @param[in] pipe Control endpoint pipe (session must be already started).
+ * @param[out] configuration_value Current configuration value.
+ * @return Error code.
+ */
+int usb_request_get_configuration(usb_pipe_t *pipe,
+    uint8_t *configuration_value)
+{
+	uint8_t value;
+	size_t actual_size;
+
+	int rc = usb_control_request_get(pipe,
+	    USB_REQUEST_TYPE_STANDARD, USB_REQUEST_RECIPIENT_DEVICE,
+	    USB_DEVREQ_GET_CONFIGURATION,
+	    0, 0,
+	    &value, 1, &actual_size);
+
+	if (rc != EOK) {
+		return rc;
+	}
+	if (actual_size != 1) {
+		return ELIMIT;
+	}
+
+	if (configuration_value != NULL) {
+		*configuration_value = value;
+	}
+
+	return EOK;
+}
+
+/** Set configuration of USB device.
+ *
+ * @param pipe Control endpoint pipe (session must be already started).
+ * @param configuration_value New configuration value.
+ * @return Error code.
+ */
+int usb_request_set_configuration(usb_pipe_t *pipe,
+    uint8_t configuration_value)
+{
+	uint16_t config_value
+	    = uint16_host2usb((uint16_t) configuration_value);
+
+	return usb_control_request_set(pipe,
+	    USB_REQUEST_TYPE_STANDARD, USB_REQUEST_RECIPIENT_DEVICE,
+	    USB_DEVREQ_SET_CONFIGURATION, config_value, 0,
+	    NULL, 0);
+}
+
+/** Get selected alternate setting for USB interface.
+ *
+ * @param[in] pipe Control endpoint pipe (session must be already started).
+ * @param[in] interface_index Interface index.
+ * @param[out] alternate_setting Alternate setting for the interface.
+ * @return Error code.
+ */
+int usb_request_get_interface(usb_pipe_t *pipe,
+    uint8_t interface_index, uint8_t *alternate_setting)
+{
+	uint8_t value;
+	size_t actual_size;
+
+	int rc = usb_control_request_get(pipe,
+	    USB_REQUEST_TYPE_STANDARD, USB_REQUEST_RECIPIENT_INTERFACE,
+	    USB_DEVREQ_GET_INTERFACE,
+	    0, uint16_host2usb((uint16_t) interface_index),
+	    &value, 1, &actual_size);
+
+	if (rc != EOK) {
+		return rc;
+	}
+	if (actual_size != 1) {
+		return ELIMIT;
+	}
+
+	if (alternate_setting != NULL) {
+		*alternate_setting = value;
+	}
+
+	return EOK;
+}
+
+/** Select alternate setting for USB interface.
+ *
+ * @param[in] pipe Control endpoint pipe (session must be already started).
+ * @param[in] interface_index Interface index.
+ * @param[in] alternate_setting Alternate setting to select.
+ * @return Error code.
+ */
+int usb_request_set_interface(usb_pipe_t *pipe,
+    uint8_t interface_index, uint8_t alternate_setting)
+{
+	return usb_control_request_set(pipe,
+	    USB_REQUEST_TYPE_STANDARD, USB_REQUEST_RECIPIENT_INTERFACE,
+	    USB_DEVREQ_SET_INTERFACE,
+	    uint16_host2usb((uint16_t) alternate_setting),
+	    uint16_host2usb((uint16_t) interface_index),
+	    NULL, 0);
+}
+
+/** Get list of supported languages by USB device.
+ *
+ * @param[in] pipe Control endpoint pipe (session must be already started).
+ * @param[out] languages_ptr Where to store pointer to allocated array of
+ *	supported languages.
+ * @param[out] languages_count Number of supported languages.
+ * @return Error code.
+ */
+int usb_request_get_supported_languages(usb_pipe_t *pipe,
+    l18_win_locales_t **languages_ptr, size_t *languages_count)
+{
+	int rc;
+
+	if (languages_ptr == NULL) {
+		return EBADMEM;
+	}
+	if (languages_count == NULL) {
+		return EBADMEM;
+	}
+
+	uint8_t *string_descriptor = NULL;
+	size_t string_descriptor_size = 0;
+	rc = usb_request_get_descriptor_alloc(pipe,
+	    USB_REQUEST_TYPE_STANDARD, USB_REQUEST_RECIPIENT_DEVICE,
+	    USB_DESCTYPE_STRING, 0, 0,
+	    (void **) &string_descriptor, &string_descriptor_size);
+	if (rc != EOK) {
+		return rc;
+	}
+	if (string_descriptor_size <= 2) {
+		free(string_descriptor);
+		return EEMPTY;
+	}
+	/* Subtract first 2 bytes (length and descriptor type). */
+	string_descriptor_size -= 2;
+
+	/* Odd number of bytes - descriptor is broken? */
+	if ((string_descriptor_size % 2) != 0) {
+		/* FIXME: shall we return with error or silently ignore? */
+		free(string_descriptor);
+		return ESTALL;
+	}
+
+	size_t langs_count = string_descriptor_size / 2;
+	l18_win_locales_t *langs
+	    = malloc(sizeof(l18_win_locales_t) * langs_count);
+	if (langs == NULL) {
+		free(string_descriptor);
+		return ENOMEM;
+	}
+
+	size_t i;
+	for (i = 0; i < langs_count; i++) {
+		/* Language code from the descriptor is in USB endianness. */
+		/* FIXME: is this really correct? */
+		uint16_t lang_code = (string_descriptor[2 + 2 * i + 1] << 8)
+		    + string_descriptor[2 + 2 * i];
+		langs[i] = uint16_usb2host(lang_code);
+	}
+
+	free(string_descriptor);
+
+	*languages_ptr = langs;
+	*languages_count =langs_count;
+
+	return EOK;
+}
+
+/** Get string (descriptor) from USB device.
+ *
+ * The string is returned in native encoding of the operating system.
+ * For HelenOS, that is UTF-8.
+ *
+ * @param[in] pipe Control endpoint pipe (session must be already started).
+ * @param[in] index String index (in native endianness),
+ *	first index has number 1 (index from descriptors can be used directly).
+ * @param[in] lang String language (in native endianness).
+ * @param[out] string_ptr Where to store allocated string in native encoding.
+ * @return Error code.
+ */
+int usb_request_get_string(usb_pipe_t *pipe,
+    size_t index, l18_win_locales_t lang, char **string_ptr)
+{
+	if (string_ptr == NULL) {
+		return EBADMEM;
+	}
+	/*
+	 * Index is actually one byte value and zero index is used
+	 * to retrieve list of supported languages.
+	 */
+	if ((index < 1) || (index > 0xFF)) {
+		return ERANGE;
+	}
+	/* Language is actually two byte value. */
+	if (lang > 0xFFFF) {
+		return ERANGE;
+	}
+
+	int rc;
+
+	/* Prepare dynamically allocated variables. */
+	uint8_t *string = NULL;
+	wchar_t *string_chars = NULL;
+
+	/* Get the actual descriptor. */
+	size_t string_size;
+	rc = usb_request_get_descriptor_alloc(pipe,
+	    USB_REQUEST_TYPE_STANDARD, USB_REQUEST_RECIPIENT_DEVICE,
+	    USB_DESCTYPE_STRING, index, uint16_host2usb(lang),
+	    (void **) &string, &string_size);
+	if (rc != EOK) {
+		goto leave;
+	}
+
+	if (string_size <= 2) {
+		rc =  EEMPTY;
+		goto leave;
+	}
+	/* Subtract first 2 bytes (length and descriptor type). */
+	string_size -= 2;
+
+	/* Odd number of bytes - descriptor is broken? */
+	if ((string_size % 2) != 0) {
+		/* FIXME: shall we return with error or silently ignore? */
+		rc = ESTALL;
+		goto leave;
+	}
+
+	size_t string_char_count = string_size / 2;
+	string_chars = malloc(sizeof(wchar_t) * (string_char_count + 1));
+	if (string_chars == NULL) {
+		rc = ENOMEM;
+		goto leave;
+	}
+
+	/*
+	 * Build a wide string.
+	 * And do not forget to set NULL terminator (string descriptors
+	 * do not have them).
+	 */
+	size_t i;
+	for (i = 0; i < string_char_count; i++) {
+		uint16_t uni_char = (string[2 + 2 * i + 1] << 8)
+		    + string[2 + 2 * i];
+		string_chars[i] = uni_char;
+	}
+	string_chars[string_char_count] = 0;
+
+
+	/* Convert to normal string. */
+	char *str = wstr_to_astr(string_chars);
+	if (str == NULL) {
+		rc = ENOMEM;
+		goto leave;
+	}
+
+	*string_ptr = str;
+	rc = EOK;
+
+leave:
+	if (string != NULL) {
+		free(string);
+	}
+	if (string_chars != NULL) {
+		free(string_chars);
+	}
+
+	return rc;
+}
+
+/** Clear halt bit of an endpoint pipe (after pipe stall).
+ *
+ * @param pipe Control pipe.
+ * @param ep_index Endpoint index (in native endianness).
+ * @return Error code.
+ */
+int usb_request_clear_endpoint_halt(usb_pipe_t *pipe, uint16_t ep_index)
+{
+	return usb_request_clear_feature(pipe,
+	    USB_REQUEST_TYPE_STANDARD, USB_REQUEST_RECIPIENT_ENDPOINT,
+	    uint16_host2usb(USB_FEATURE_SELECTOR_ENDPOINT_HALT),
+	    uint16_host2usb(ep_index));
+}
+
+/** Clear halt bit of an endpoint pipe (after pipe stall).
+ *
+ * @param ctrl_pipe Control pipe.
+ * @param target_pipe Which pipe is halted and shall be cleared.
+ * @return Error code.
+ */
+int usb_pipe_clear_halt(usb_pipe_t *ctrl_pipe, usb_pipe_t *target_pipe)
+{
+	if ((ctrl_pipe == NULL) || (target_pipe == NULL)) {
+		return EINVAL;
+	}
+	return usb_request_clear_endpoint_halt(ctrl_pipe,
+	    target_pipe->endpoint_no);
+}
+
+/** Get endpoint status.
+ *
+ * @param[in] ctrl_pipe Control pipe.
+ * @param[in] pipe Of which pipe the status shall be received.
+ * @param[out] status Where to store pipe status (in native endianness).
+ * @return Error code.
+ */
+int usb_request_get_endpoint_status(usb_pipe_t *ctrl_pipe, usb_pipe_t *pipe,
+    uint16_t *status)
+{
+	uint16_t status_tmp;
+	uint16_t pipe_index = (uint16_t) pipe->endpoint_no;
+	int rc = usb_request_get_status(ctrl_pipe,
+	    USB_REQUEST_RECIPIENT_ENDPOINT, uint16_host2usb(pipe_index),
+	    &status_tmp);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	if (status != NULL) {
+		*status = uint16_usb2host(status_tmp);
+	}
+
+	return EOK;
+}
+
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/Makefile
===================================================================
--- uspace/lib/usbhid/Makefile	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/Makefile	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,46 @@
+#
+# Copyright (c) 2011 Vojtech Horky
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# - Redistributions of source code must retain the above copyright
+#   notice, this list of conditions and the following disclaimer.
+# - Redistributions in binary form must reproduce the above copyright
+#   notice, this list of conditions and the following disclaimer in the
+#   documentation and/or other materials provided with the distribution.
+# - The name of the author may not be used to endorse or promote products
+#   derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+USPACE_PREFIX = ../..
+LIBRARY = libusbhid
+EXTRA_CFLAGS += \
+	-I$(LIBUSB_PREFIX)/include \
+	-I$(LIBUSBDEV_PREFIX)/include \
+	-I$(LIBDRV_PREFIX)/include \
+	-Iinclude
+
+SOURCES = \
+	src/hiddescriptor.c \
+	src/hidiface.c \
+	src/hidparser.c \
+	src/hidpath.c \
+	src/hidreport.c \
+	src/consumer.c \
+	src/hidreq.c
+
+include $(USPACE_PREFIX)/Makefile.common
Index: uspace/lib/usbhid/include/usb/hid/hid.h
===================================================================
--- uspace/lib/usbhid/include/usb/hid/hid.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/include/usb/hid/hid.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2010 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhid
+ * @{
+ */
+/** @file
+ * @brief USB HID device related types.
+ */
+#ifndef LIBUSBHID_HID_H_
+#define LIBUSBHID_HID_H_
+
+#include <usb/usb.h>
+#include <usb/hid/hidparser.h>
+#include <usb/descriptor.h>
+
+/** USB/HID device requests. */
+typedef enum {
+	USB_HIDREQ_GET_REPORT = 1,
+	USB_HIDREQ_GET_IDLE = 2,
+	USB_HIDREQ_GET_PROTOCOL = 3,
+	/* Values 4 to 8 are reserved. */
+	USB_HIDREQ_SET_REPORT = 9,
+	USB_HIDREQ_SET_IDLE = 10,
+	USB_HIDREQ_SET_PROTOCOL = 11
+} usb_hid_request_t;
+
+typedef enum {
+	USB_HID_PROTOCOL_BOOT = 0,
+	USB_HID_PROTOCOL_REPORT = 1
+} usb_hid_protocol_t;
+
+/** USB/HID subclass constants. */
+typedef enum {
+	USB_HID_SUBCLASS_NONE = 0,
+	USB_HID_SUBCLASS_BOOT = 1
+} usb_hid_subclass_t;
+
+/** USB/HID interface protocols. */
+typedef enum {
+	USB_HID_PROTOCOL_NONE = 0,
+	USB_HID_PROTOCOL_KEYBOARD = 1,
+	USB_HID_PROTOCOL_MOUSE = 2
+} usb_hid_iface_protocol_t;
+
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/include/usb/hid/hid_report_items.h
===================================================================
--- uspace/lib/usbhid/include/usb/hid/hid_report_items.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/include/usb/hid/hid_report_items.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,354 @@
+/*
+ * Copyright (c) 2011 Matej Klonfar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * @brief USB HID Report descriptor item tags.
+ */
+#ifndef LIBUSB_HID_REPORT_ITEMS_H_
+#define LIBUSB_HID_REPORT_ITEMS_H_
+
+#include <stdint.h>
+
+/*---------------------------------------------------------------------------*/
+/*
+ * Item prefix
+ */
+
+/** Returns size of item data in bytes */
+#define USB_HID_ITEM_SIZE(data) 	((uint8_t)(data & 0x3))
+
+/** Returns item tag */
+#define USB_HID_ITEM_TAG(data) 		((uint8_t)((data & 0xF0) >> 4))
+
+/** Returns class of item tag */
+#define USB_HID_ITEM_TAG_CLASS(data)	((uint8_t)((data & 0xC) >> 2))
+
+/** Returns if the item is the short item or long item. Long items are not
+ * supported. */
+#define USB_HID_ITEM_IS_LONG(data)	(data == 0xFE)
+
+/*---------------------------------------------------------------------------*/
+/*
+ * Extended usage macros
+ */
+
+/** Recognizes if the given usage is extended (contains also usage page).  */
+#define USB_HID_IS_EXTENDED_USAGE(usage)	((usage & 0xFFFF0000) != 0)
+
+/** Cuts usage page of the extended usage. */
+#define USB_HID_EXTENDED_USAGE_PAGE(usage)	((usage & 0xFFFF0000) >> 16)
+
+/** Cuts usage of the extended usage */
+#define USB_HID_EXTENDED_USAGE(usage)		(usage & 0xFFFF)
+
+/*---------------------------------------------------------------------------*/
+/*
+ * Input/Output/Feature Item flags
+ */
+/** 
+ * Indicates whether the item is data (0) or a constant (1) value. Data
+ * indicates the item is defining report fields that contain modifiable device
+ * data. Constant indicates the item is a static read-only field in a report
+ * and cannot be modified (written) by the host.
+ */
+#define USB_HID_ITEM_FLAG_CONSTANT(flags) 	((flags & 0x1) == 0x1)
+
+/**
+ * Indicates whether the item creates variable (1) or array (0) data fields in
+ * reports. 
+ */
+#define USB_HID_ITEM_FLAG_VARIABLE(flags) 	((flags & 0x2) == 0x2)
+
+/**
+ * Indicates whether the data is absolute (0) (based on a fixed origin) or
+ * relative (1) (indicating the change in value from the last report). Mouse
+ * devices usually provide relative data, while tablets usually provide
+ * absolute data.
+ */
+#define USB_HID_ITEM_FLAG_RELATIVE(flags) 	((flags & 0x4) == 0x4)
+
+/** Indicates whether the data “rolls over” when reaching either the extreme
+ * high or low value. For example, a dial that can spin freely 360 degrees
+ * might output values from 0 to 10. If Wrap is indicated, the next value
+ * reported after passing the 10 position in the increasing direction would be
+ * 0.
+ */
+#define USB_HID_ITEM_FLAG_WRAP(flags)		((flags & 0x8) == 0x8)
+
+/**
+ * Indicates whether the raw data from the device has been processed in some
+ * way, and no longer represents a linear relationship between what is
+ * measured and the data that is reported.
+ */
+#define USB_HID_ITEM_FLAG_LINEAR(flags)		((flags & 0x10) == 0x10)
+
+/**
+ * Indicates whether the control has a preferred state to which it will return
+ * when the user is not physically interacting with the control. Push buttons
+ * (as opposed to toggle buttons) and self- centering joysticks are examples.
+ */
+#define USB_HID_ITEM_FLAG_PREFERRED(flags)	((flags & 0x20) == 0x20)
+
+/**
+ * Indicates whether the control has a state in which it is not sending
+ * meaningful data. One possible use of the null state is for controls that
+ * require the user to physically interact with the control in order for it to
+ * report useful data.
+ */
+#define USB_HID_ITEM_FLAG_POSITION(flags)	((flags & 0x40) == 0x40)
+
+/**
+ * Indicates whether the Feature or Output control's value should be changed
+ * by the host or not.  Volatile output can change with or without host
+ * interaction. To avoid synchronization problems, volatile controls should be
+ * relative whenever possible.
+ */
+#define USB_HID_ITEM_FLAG_VOLATILE(flags)	((flags & 0x80) == 0x80)
+
+/**
+ * Indicates that the control emits a fixed-size stream of bytes. The contents
+ * of the data field are determined by the application. The contents of the
+ * buffer are not interpreted as a single numeric quantity. Report data
+ * defined by a Buffered Bytes item must be aligned on an 8-bit boundary.
+ */
+#define USB_HID_ITEM_FLAG_BUFFERED(flags)	((flags & 0x100) == 0x100)
+
+/*---------------------------------------------------------------------------*/
+
+/* MAIN ITEMS */
+
+/**
+ * Main items are used to either define or group certain types of data fields
+ * within a Report descriptor.
+ */
+#define USB_HID_TAG_CLASS_MAIN			0x0
+
+/**
+ * An Input item describes information about the data provided by one or more
+ * physical controls. An application can use this information to interpret the
+ * data provided by the device. All data fields defined in a single item share
+ * an identical data format.
+ */
+#define USB_HID_REPORT_TAG_INPUT		0x8
+
+/**
+ * The Output item is used to define an output data field in a report. This
+ * item is similar to an Input item except it describes data sent to the
+ * device—for example, LED states.
+ */
+#define USB_HID_REPORT_TAG_OUTPUT		0x9
+
+/**
+ * Feature items describe device configuration information that can be sent to
+ * the device.
+ */
+#define USB_HID_REPORT_TAG_FEATURE		0xB
+
+/**
+ * A Collection item identifies a relationship between two or more data
+ * (Input, Output, or Feature.) 
+ */
+#define USB_HID_REPORT_TAG_COLLECTION		0xA
+
+/**
+ * While the Collection item opens a collection of data, the End Collection
+ * item closes a collection.
+ */
+#define USB_HID_REPORT_TAG_END_COLLECTION	0xC
+
+/*---------------------------------------------------------------------------*/
+
+/* GLOBAL ITEMS */
+
+/**
+ * Global items describe rather than define data from a control.
+ */
+#define USB_HID_TAG_CLASS_GLOBAL		0x1
+
+/**
+ * Unsigned integer specifying the current Usage Page. Since a usage are 32
+ * bit values, Usage Page items can be used to conserve space in a report
+ * descriptor by setting the high order 16 bits of a subsequent usages. Any
+ * usage that follows which is defines 16 bits or less is interpreted as a
+ * Usage ID and concatenated with the Usage Page to form a 32 bit Usage.
+ */
+#define USB_HID_REPORT_TAG_USAGE_PAGE		0x0
+
+/** 
+ * Extent value in logical units. This is the minimum value that a variable
+ * or array item will report. For example, a mouse reporting x position values
+ * from 0 to 128 would have a Logical Minimum of 0 and a Logical Maximum of
+ * 128.
+ */
+#define USB_HID_REPORT_TAG_LOGICAL_MINIMUM	0x1
+
+/** 
+ * Extent value in logical units. This is the maximum value that a variable
+ * or array item will report.
+ */
+#define USB_HID_REPORT_TAG_LOGICAL_MAXIMUM	0x2
+
+/** 
+ * Minimum value for the physical extent of a variable item. This represents
+ * the Logical Minimum with units applied to it.
+ */
+#define USB_HID_REPORT_TAG_PHYSICAL_MINIMUM 	0x3
+
+/** 
+ * Maximum value for the physical extent of a variable item.
+ */
+#define USB_HID_REPORT_TAG_PHYSICAL_MAXIMUM 	0x4
+
+/** 
+ * Value of the unit exponent in base 10. See the table later in this section
+ * for more information.
+ */
+#define USB_HID_REPORT_TAG_UNIT_EXPONENT	0x5
+
+/** 
+ * Unit values.
+ */
+#define USB_HID_REPORT_TAG_UNIT			0x6
+
+/** 
+ * Unsigned integer specifying the size of the report fields in bits. This
+ * allows the parser to build an item map for the report handler to use.
+ */
+#define USB_HID_REPORT_TAG_REPORT_SIZE		0x7
+
+/** 
+ * Unsigned value that specifies the Report ID. If a Report ID tag is used
+ * anywhere in Report descriptor, all data reports for the device are preceded
+ * by a single byte ID field. All items succeeding the first Report ID tag but
+ * preceding a second Report ID tag are included in a report prefixed by a
+ * 1-byte ID. All items succeeding the second but preceding a third Report ID
+ * tag are included in a second report prefixed by a second ID, and so on.
+ */
+#define USB_HID_REPORT_TAG_REPORT_ID		0x8
+
+/** 
+ * Unsigned integer specifying the number of data fields for the item;
+ * determines how many fields are included in the report for this particular
+ * item (and consequently how many bits are added to the report).
+ */
+#define USB_HID_REPORT_TAG_REPORT_COUNT		0x9
+
+/** 
+ * Places a copy of the global item state table on the stack.
+ */
+#define USB_HID_REPORT_TAG_PUSH			0xA
+
+/** 
+ * Replaces the item state table with the top structure from the stack.
+ */
+#define USB_HID_REPORT_TAG_POP			0xB
+
+/*---------------------------------------------------------------------------*/
+
+/* LOCAL ITEMS */
+
+/**
+ * Local item tags define characteristics of controls. These items do not
+ * carry over to the next Main item. If a Main item defines more than one
+ * control, it may be preceded by several similar Local item tags. For
+ * example, an Input item may have several Usage tags associated with it, one
+ * for each control.
+ */
+#define USB_HID_TAG_CLASS_LOCAL			0x2
+
+/**
+ * Usage index for an item usage; represents a suggested usage for the item or
+ * collection. In the case where an item represents multiple controls, a Usage
+ * tag may suggest a usage for every variable or element in an array.
+ */
+#define USB_HID_REPORT_TAG_USAGE		0x0
+
+/**
+ * Defines the starting usage associated with an array or bitmap.
+ */
+#define USB_HID_REPORT_TAG_USAGE_MINIMUM	0x1
+
+/**
+ * Defines the ending usage associated with an array or bitmap.
+ */
+#define USB_HID_REPORT_TAG_USAGE_MAXIMUM	0x2
+
+/**
+ * Determines the body part used for a control. Index points to a designator
+ * in the Physical descriptor.
+ */
+#define USB_HID_REPORT_TAG_DESIGNATOR_INDEX	0x3
+
+/**
+ * Defines the index of the starting designator associated with an array or
+ * bitmap.
+ */
+#define USB_HID_REPORT_TAG_DESIGNATOR_MINIMUM	0x4
+
+/**
+ * Defines the index of the ending designator associated with an array or
+ * bitmap.
+ */
+#define USB_HID_REPORT_TAG_DESIGNATOR_MAXIMUM	0x5
+
+/**
+ * String index for a String descriptor; allows a string to be associated with
+ * a particular item or control.
+ */
+#define USB_HID_REPORT_TAG_STRING_INDEX		0x7
+
+/**
+ * Specifies the first string index when assigning a group of sequential
+ * strings to controls in an array or bitmap.
+ */
+#define USB_HID_REPORT_TAG_STRING_MINIMUM	0x8
+
+/**
+ * Specifies the last string index when assigning a group of sequential
+ * strings to controls in an array or bitmap.
+ */
+#define USB_HID_REPORT_TAG_STRING_MAXIMUM	0x9
+
+/**
+ * Defines the beginning or end of a set of local items (1 = open set, 0 =
+ * close set).
+ *
+ * Usages other than the first (most preferred) usage defined are not
+ * accessible by system software.
+ */
+#define USB_HID_REPORT_TAG_DELIMITER		0xA
+
+/*---------------------------------------------------------------------------*/
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/include/usb/hid/hiddescriptor.h
===================================================================
--- uspace/lib/usbhid/include/usb/hid/hiddescriptor.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/include/usb/hid/hiddescriptor.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2011 Matej Klonfar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * USB HID report descriptor and report data parser
+ */
+#ifndef LIBUSB_HIDDESCRIPTOR_H_
+#define LIBUSB_HIDDESCRIPTOR_H_
+
+#include <stdint.h>
+#include <adt/list.h>
+#include <usb/hid/hid_report_items.h>
+#include <usb/hid/hidpath.h>
+#include <usb/hid/hidtypes.h>
+
+int usb_hid_parse_report_descriptor(usb_hid_report_t *report, 
+		const uint8_t *data, size_t size);
+
+void usb_hid_free_report(usb_hid_report_t *report);
+
+void usb_hid_descriptor_print(usb_hid_report_t *report);
+
+int usb_hid_report_init(usb_hid_report_t *report);
+
+int usb_hid_report_append_fields(usb_hid_report_t *report,
+		usb_hid_report_item_t *report_item);
+
+usb_hid_report_description_t * usb_hid_report_find_description(
+		const usb_hid_report_t *report, uint8_t report_id,
+		usb_hid_report_type_t type);
+
+int usb_hid_report_parse_tag(uint8_t tag, uint8_t class, const uint8_t *data,
+		size_t item_size, usb_hid_report_item_t *report_item,
+		usb_hid_report_path_t *usage_path);
+
+int usb_hid_report_parse_main_tag(uint8_t tag, const uint8_t *data, 
+		size_t item_size, usb_hid_report_item_t *report_item,
+		usb_hid_report_path_t *usage_path);
+
+int usb_hid_report_parse_global_tag(uint8_t tag, const uint8_t *data, 
+		size_t item_size, usb_hid_report_item_t *report_item,
+		usb_hid_report_path_t *usage_path);
+
+int usb_hid_report_parse_local_tag(uint8_t tag, const uint8_t *data, 
+		size_t item_size, usb_hid_report_item_t *report_item,
+		usb_hid_report_path_t *usage_path);
+
+void usb_hid_descriptor_print_list(link_t *head);
+
+void usb_hid_report_reset_local_items(usb_hid_report_item_t *report_item);
+
+void usb_hid_free_report_list(link_t *head);
+
+usb_hid_report_item_t *usb_hid_report_item_clone(
+		const usb_hid_report_item_t *item);
+
+uint32_t usb_hid_report_tag_data_uint32(const uint8_t *data, size_t size);
+
+usb_hid_report_path_t *usb_hid_report_path_try_insert(usb_hid_report_t*report,
+		usb_hid_report_path_t *cmp_path);
+
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/include/usb/hid/hidparser.h
===================================================================
--- uspace/lib/usbhid/include/usb/hid/hidparser.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/include/usb/hid/hidparser.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2011 Matej Klonfar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhid
+ * @{
+ */
+/** @file
+ * USB HID report descriptor and report data parser
+ */
+#ifndef LIBUSBHID_HIDPARSER_H_
+#define LIBUSBHID_HIDPARSER_H_
+
+#include <stdint.h>
+#include <adt/list.h>
+#include <usb/hid/hid_report_items.h>
+#include <usb/hid/hidpath.h>
+#include <usb/hid/hidtypes.h>
+#include <usb/hid/hiddescriptor.h>
+
+
+/*
+ * Input report parser functions
+ */
+int usb_hid_parse_report(const usb_hid_report_t *report, const uint8_t *data,
+		size_t size, uint8_t *report_id);
+
+/*
+ * Output report parser functions
+ */
+uint8_t *usb_hid_report_output(usb_hid_report_t *report, size_t *size, 
+		uint8_t report_id);
+
+void usb_hid_report_output_free(uint8_t *output);
+
+size_t usb_hid_report_size(usb_hid_report_t *report, uint8_t report_id,
+		usb_hid_report_type_t type);
+
+size_t usb_hid_report_byte_size(usb_hid_report_t *report, uint8_t report_id,
+		usb_hid_report_type_t type);
+
+
+int usb_hid_report_output_translate(usb_hid_report_t *report, 
+		uint8_t report_id, uint8_t *buffer, size_t size);
+
+
+/*
+ * Report descriptor structure observing functions
+ */
+usb_hid_report_field_t *usb_hid_report_get_sibling(usb_hid_report_t *report,
+		usb_hid_report_field_t *field, usb_hid_report_path_t *path,
+		int flags, usb_hid_report_type_t type);
+
+uint8_t usb_hid_get_next_report_id(usb_hid_report_t *report, 
+		uint8_t report_id, usb_hid_report_type_t type);
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/include/usb/hid/hidpath.h
===================================================================
--- uspace/lib/usbhid/include/usb/hid/hidpath.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/include/usb/hid/hidpath.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,144 @@
+/*
+ * Copyright (c) 2011 Matej Klonfar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * USB HID report descriptor and report data parser
+ */
+#ifndef LIBUSB_HIDPATH_H_
+#define LIBUSB_HIDPATH_H_
+
+#include <usb/hid/hidparser.h>
+#include <stdint.h>
+#include <adt/list.h>
+
+
+/*---------------------------------------------------------------------------*/
+/*
+ * Flags of usage paths comparison modes.
+ *
+ */
+/** Wanted usage path must be exactly the same as the searched one.  This
+ * option cannot be combined with the others. 
+ */
+#define USB_HID_PATH_COMPARE_STRICT		0
+
+/**
+ * Wanted usage path must be the suffix in the searched one.
+ */
+#define USB_HID_PATH_COMPARE_END		1
+
+/** 
+ * Only usage page are compared along the usage path.  This option can be
+ * combined with others. 
+ */
+#define USB_HID_PATH_COMPARE_USAGE_PAGE_ONLY	2
+
+/** 
+ * Searched usage page must be prefix of the other one.
+ */
+#define USB_HID_PATH_COMPARE_BEGIN		4
+
+/** 
+ * Searched couple of usage page and usage can be anywhere in usage path.
+ * This option is deprecated.
+ */
+#define USB_HID_PATH_COMPARE_ANYWHERE		8
+
+/*----------------------------------------------------------------------------*/
+/** 
+ * Item of usage path structure. Last item of linked list describes one item
+ * in report, the others describe superior Collection tags. Usage and Usage
+ * page of report item can be changed due to data in report. 
+ */
+typedef struct {
+	/** Usage page of report item. Zero when usage page can be changed. */
+	uint32_t usage_page;
+	/** Usage of report item. Zero when usage can be changed. */	
+	uint32_t usage;
+
+	/** Attribute of Collection tag in report descriptor*/
+	uint8_t flags;
+
+	/** Linked list structure*/
+	link_t link;
+} usb_hid_report_usage_path_t;
+
+
+/*---------------------------------------------------------------------------*/
+/** 
+ * USB HID usage path structure.
+ * */
+typedef struct {
+	/** Length of usage path */	
+	int depth;	
+
+	/** Report id. Zero is reserved and means that report id is not used.
+	 * */
+	uint8_t report_id;
+	
+	/** Linked list structure. */	
+	link_t link; /* list */
+
+	/** Head of the list of usage path items. */
+	link_t head;
+
+} usb_hid_report_path_t;
+
+/*---------------------------------------------------------------------------*/
+usb_hid_report_path_t *usb_hid_report_path(void);
+
+void usb_hid_report_path_free(usb_hid_report_path_t *path);
+
+int usb_hid_report_path_set_report_id(usb_hid_report_path_t *usage_path,
+		uint8_t report_id);
+
+int usb_hid_report_path_append_item(usb_hid_report_path_t *usage_path, 
+		int32_t usage_page, int32_t usage);
+
+void usb_hid_report_remove_last_item(usb_hid_report_path_t *usage_path);
+
+void usb_hid_report_null_last_item(usb_hid_report_path_t *usage_path);
+
+void usb_hid_report_set_last_item(usb_hid_report_path_t *usage_path, 
+		int32_t tag, int32_t data);
+
+int usb_hid_report_compare_usage_path(usb_hid_report_path_t *report_path,
+		usb_hid_report_path_t *path, int flags);
+
+usb_hid_report_path_t *usb_hid_report_path_clone(
+		usb_hid_report_path_t *usage_path);
+
+void usb_hid_print_usage_path(usb_hid_report_path_t *path);
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/include/usb/hid/hidreport.h
===================================================================
--- uspace/lib/usbhid/include/usb/hid/hidreport.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/include/usb/hid/hidreport.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2011 Lubos Slovak
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhid
+ * @{
+ */
+/** @file
+ * USB HID report parser initialization from descriptors.
+ */
+
+#ifndef LIBUSBHID_HIDREPORT_H_
+#define LIBUSBHID_HIDREPORT_H_
+
+#include <usb/dev/driver.h>
+#include <usb/hid/hidparser.h>
+
+/**
+ * Retrieves the Report descriptor from the USB device and initializes the
+ * report parser.
+ *
+ * \param[in] dev USB device representing a HID device.
+ * \param[in/out] parser HID Report parser.
+ * \param[out] report_desc Place to save report descriptor into.
+ * \param[out] report_size
+ *
+ * \retval EOK if successful.
+ * \retval EINVAL if one of the parameters is not given (is NULL).
+ * \retval ENOENT if there are some descriptors missing.
+ * \retval ENOMEM if an error with allocation occured.
+ * \retval EINVAL if the Report descriptor's size does not match the size 
+ *         from the interface descriptor.
+ * \return Other value inherited from function usb_pipe_start_session(),
+ *         usb_pipe_end_session() or usb_request_get_descriptor().
+ */
+int usb_hid_process_report_descriptor(usb_device_t *dev, 
+    usb_hid_report_t *report, uint8_t **report_desc, size_t *report_size);
+
+#endif /* LIBUSB_HIDREPORT_H_ */
+
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/include/usb/hid/hidtypes.h
===================================================================
--- uspace/lib/usbhid/include/usb/hid/hidtypes.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/include/usb/hid/hidtypes.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,322 @@
+/*
+ * Copyright (c) 2011 Matej Klonfar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusb
+ * @{
+ */
+/** @file
+ * Basic data structures for USB HID Report descriptor and report parser.
+ */
+#ifndef LIBUSB_HIDTYPES_H_
+#define LIBUSB_HIDTYPES_H_
+
+#include <stdint.h>
+#include <adt/list.h>
+
+/*---------------------------------------------------------------------------*/
+
+/**
+ * Maximum amount of specified usages for one report item
+ */
+#define USB_HID_MAX_USAGES	0xffff
+
+/**
+ * Converts integer from unsigned two's complement format format to signed
+ * one.
+ *
+ * @param x Number to convert
+ * @param size Length of the unsigned number in bites
+ * @return signed int
+ */
+#define USB_HID_UINT32_TO_INT32(x, size)	\
+	((((x) & (1 << ((size) - 1))) != 0) ?   \
+	 -(~((x) - 1) & ((1 << size) - 1)) : (x))
+
+/**
+ * Convert integer from signed format to unsigned. If number is negative the
+ * two's complement format is used.
+ *
+ * @param x Number to convert
+ * @param size Length of result number in bites
+ * @return unsigned int
+ */
+#define USB_HID_INT32_TO_UINT32(x, size)	\
+	(((x) < 0 ) ? ((1 << (size)) + (x)) : (x))
+
+/*---------------------------------------------------------------------------*/
+
+/**
+ * Enum of report types
+ */
+typedef enum {
+	/** Input report. Data are sent from device to system */
+	USB_HID_REPORT_TYPE_INPUT = 1,
+
+	/** Output report. Data are sent from system to device */
+	USB_HID_REPORT_TYPE_OUTPUT = 2,
+
+	/** Feature report. Describes device configuration information that
+	 * can be sent to the device */
+	USB_HID_REPORT_TYPE_FEATURE = 3
+} usb_hid_report_type_t;
+
+/*---------------------------------------------------------------------------*/
+
+/**
+ * Description of all reports described in one report descriptor.
+ */
+typedef struct {
+	/** Count of available reports. */
+	int report_count;
+
+	/** Head of linked list of description of reports. */
+	link_t reports;
+
+	/** Head of linked list of all used usage/collection paths. */
+	link_t collection_paths;
+
+	/** Length of list of usage paths. */
+	int collection_paths_count;
+
+	/** Flag whether report ids are used. */
+	int use_report_ids;
+
+	/** Report id of last parsed report. */
+	uint8_t last_report_id;
+	
+} usb_hid_report_t;
+/*---------------------------------------------------------------------------*/
+
+/**
+ * Description of one concrete report
+ */
+typedef struct {
+	/** Report id. Zero when no report id is used. */
+	uint8_t report_id;
+
+	/** Type of report */
+	usb_hid_report_type_t type;
+
+	/** Bit length of the report */
+	size_t bit_length;
+
+	/** Number of items in report */
+	size_t item_length;
+	
+	/** Linked list of report items in report */
+	link_t report_items;
+
+	/** Linked list of descriptions. */
+	link_t link;
+} usb_hid_report_description_t;
+/*---------------------------------------------------------------------------*/
+
+/**
+ * Description of one field/item in report 
+ */
+typedef struct {
+	/** Bit offset of the field */
+	int offset;
+
+	/** Bit size of the field */
+	size_t size;
+
+	/** Usage page. Zero when usage page can be changed. */
+	uint16_t usage_page;
+
+	/** Usage. Zero when usage can be changed. */
+	uint16_t usage;
+
+	/** Item's attributes */
+	uint8_t item_flags;
+
+	/** Usage/Collection path of the field. */
+	usb_hid_report_path_t *collection_path;
+
+	/** 
+	 * The lowest valid logical value (value with the device operates)
+	 */
+	int32_t logical_minimum;
+
+	/**
+	 * The greatest valid logical value
+	 */
+	int32_t logical_maximum;
+
+	/**
+	 * The lowest valid physical value (value with the system operates)
+	 */
+	int32_t physical_minimum;
+
+	/** The greatest valid physical value */
+	int32_t physical_maximum;
+
+	/** The lowest valid usage index */
+	int32_t usage_minimum;
+
+	/** The greatest valid usage index */
+	int32_t usage_maximum;
+	
+	/** Unit of the value */
+	uint32_t unit;
+
+	/** Unit exponent */
+	uint32_t unit_exponent;
+
+	/** Array of possible usages */
+	uint32_t *usages;
+
+	/** Size of the array of usages */
+	size_t usages_count;
+
+	/** Parsed value */
+	int32_t value;
+
+	/** List to another report items */
+	link_t link;
+} usb_hid_report_field_t;
+
+/*---------------------------------------------------------------------------*/
+
+/**
+ * State table for report descriptor parsing
+ */
+typedef struct {
+	/** report id */	
+	int32_t id;
+	
+	/** Extended usage page */
+	uint16_t extended_usage_page;
+
+	/** Array of usages specified for this item */
+	uint32_t usages[USB_HID_MAX_USAGES];
+	
+	/** Length of usages array */
+	int usages_count;
+
+	/** Usage page*/
+	uint32_t usage_page;
+
+	/** Minimum valid usage index */	
+	int32_t usage_minimum;
+	
+	/** Maximum valid usage index */	
+	int32_t usage_maximum;
+	
+	/** Minimum valid logical value */	
+	int32_t logical_minimum;
+	
+	/** Maximum valid logical value */	
+	int32_t logical_maximum;
+
+	/** Length of the items in bits*/	
+	int32_t size;
+
+	/** COunt of items*/	
+	int32_t count;
+
+	/**  Bit offset of the item in report */	
+	size_t offset;
+
+	/** Unit exponent */	
+	int32_t unit_exponent;
+	/** Unit of the value */	
+	int32_t unit;
+
+	/** String index */
+	uint32_t string_index;
+
+	/** Minimum valid string index */	
+	uint32_t string_minimum;
+
+	/** Maximum valid string index */	
+	uint32_t string_maximum;
+
+	/** The designator index */	
+	uint32_t designator_index;
+
+	/** Minimum valid designator value*/	
+	uint32_t designator_minimum;
+
+	/** Maximum valid designator value*/	
+	uint32_t designator_maximum;
+
+	/** Minimal valid physical value*/	
+	int32_t physical_minimum;
+
+	/** Maximal valid physical value */	
+	int32_t physical_maximum;
+
+	/** Items attributes*/	
+	uint8_t item_flags;
+
+	/** Report type */
+	usb_hid_report_type_t type;
+
+	/** current collection path*/	
+	usb_hid_report_path_t *usage_path;
+
+	/** Unused*/	
+	link_t link;
+
+	int in_delimiter;
+} usb_hid_report_item_t;
+/*---------------------------------------------------------------------------*/
+/**
+ * Enum of the keyboard modifiers 
+ */
+typedef enum {
+	USB_HID_MOD_LCTRL = 0x01,
+	USB_HID_MOD_LSHIFT = 0x02,
+	USB_HID_MOD_LALT = 0x04,
+	USB_HID_MOD_LGUI = 0x08,
+	USB_HID_MOD_RCTRL = 0x10,
+	USB_HID_MOD_RSHIFT = 0x20,
+	USB_HID_MOD_RALT = 0x40,
+	USB_HID_MOD_RGUI = 0x80,
+	USB_HID_MOD_COUNT = 8
+} usb_hid_modifiers_t;
+
+static const usb_hid_modifiers_t 
+    usb_hid_modifiers_consts[USB_HID_MOD_COUNT] = {
+	USB_HID_MOD_LCTRL,
+	USB_HID_MOD_LSHIFT,
+	USB_HID_MOD_LALT,
+	USB_HID_MOD_LGUI,
+	USB_HID_MOD_RCTRL,
+	USB_HID_MOD_RSHIFT,
+	USB_HID_MOD_RALT,
+	USB_HID_MOD_RGUI
+};
+/*---------------------------------------------------------------------------*/
+
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/include/usb/hid/iface.h
===================================================================
--- uspace/lib/usbhid/include/usb/hid/iface.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/include/usb/hid/iface.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhid
+ * @{
+ */
+/** @file
+ * Client functions for accessing USB HID interface.
+ */
+#ifndef LIBUSBHID_CLASSES_HID_IFACE_H_
+#define LIBUSBHID_CLASSES_HID_IFACE_H_
+
+#include <sys/types.h>
+#include <async.h>
+
+extern int usbhid_dev_get_event_length(async_sess_t *, size_t *);
+extern int usbhid_dev_get_event(async_sess_t *, uint8_t *, size_t, size_t *,
+    int *, unsigned int);
+extern int usbhid_dev_get_report_descriptor_length(async_sess_t *, size_t *);
+extern int usbhid_dev_get_report_descriptor(async_sess_t *, uint8_t *, size_t,
+    size_t *);
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/include/usb/hid/request.h
===================================================================
--- uspace/lib/usbhid/include/usb/hid/request.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/include/usb/hid/request.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2011 Lubos Slovak
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhid
+ * @{
+ */
+/** @file
+ * HID class-specific requests.
+ */
+
+#ifndef USB_KBD_HIDREQ_H_
+#define USB_KBD_HIDREQ_H_
+
+#include <stdint.h>
+
+#include <usb/hid/hid.h>
+#include <usb/dev/pipes.h>
+
+/*----------------------------------------------------------------------------*/
+
+int usbhid_req_set_report(usb_pipe_t *ctrl_pipe, int iface_no,
+    usb_hid_report_type_t type, uint8_t *buffer, size_t buf_size);
+
+int usbhid_req_set_protocol(usb_pipe_t *ctrl_pipe, int iface_no, 
+    usb_hid_protocol_t protocol);
+
+int usbhid_req_set_idle(usb_pipe_t *ctrl_pipe, int iface_no, uint8_t duration);
+
+int usbhid_req_get_report(usb_pipe_t *ctrl_pipe, int iface_no, 
+    usb_hid_report_type_t type, uint8_t *buffer, size_t buf_size, 
+    size_t *actual_size);
+
+int usbhid_req_get_protocol(usb_pipe_t *ctrl_pipe, int iface_no, 
+    usb_hid_protocol_t *protocol);
+
+int usbhid_req_get_idle(usb_pipe_t *ctrl_pipe, int iface_no, uint8_t *duration);
+
+/*----------------------------------------------------------------------------*/
+
+#endif /* USB_KBD_HIDREQ_H_ */
+
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/include/usb/hid/usages/consumer.h
===================================================================
--- uspace/lib/usbhid/include/usb/hid/usages/consumer.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/include/usb/hid/usages/consumer.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2011 Lubos Slovak
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhid
+ * @{
+ */
+/** @file
+ * USB multimedia key usage to string mapping.
+ */
+
+#ifndef LIBUSBHID_CONSUMER_H_
+#define LIBUSBHID_CONSUMER_H_
+
+const char *usbhid_multimedia_usage_to_str(int usage);
+
+#endif /* LIBUSBHID_CONSUMER_H_ */
+
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/include/usb/hid/usages/core.h
===================================================================
--- uspace/lib/usbhid/include/usb/hid/usages/core.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/include/usb/hid/usages/core.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2010 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhid
+ * @{
+ */
+/** @file
+ * @brief USB HID Usage Tables.
+ */
+#ifndef LIBUSBHID_HIDUT_H_
+#define LIBUSBHID_HIDUT_H_
+
+/** USB/HID Usage Pages. */
+typedef enum {
+	USB_HIDUT_PAGE_GENERIC_DESKTOP = 1,
+	USB_HIDUT_PAGE_SIMULATION = 2,
+	USB_HIDUT_PAGE_VR = 3,
+	USB_HIDUT_PAGE_SPORT = 4,
+	USB_HIDUT_PAGE_GAME = 5,
+	USB_HIDUT_PAGE_GENERIC_DEVICE = 6,
+	USB_HIDUT_PAGE_KEYBOARD = 7,
+	USB_HIDUT_PAGE_LED = 8,
+	USB_HIDUT_PAGE_BUTTON = 9,
+	USB_HIDUT_PAGE_ORDINAL = 0x0a,
+	USB_HIDUT_PAGE_TELEPHONY_DEVICE = 0x0b,
+	USB_HIDUT_PAGE_CONSUMER = 0x0c
+} usb_hidut_usage_page_t;
+
+/** Usages for Generic Desktop Page. */
+typedef enum {
+	USB_HIDUT_USAGE_GENERIC_DESKTOP_POINTER = 1,
+	USB_HIDUT_USAGE_GENERIC_DESKTOP_MOUSE = 2,
+	USB_HIDUT_USAGE_GENERIC_DESKTOP_JOYSTICK = 4,
+	USB_HIDUT_USAGE_GENERIC_DESKTOP_GAMEPAD = 5,
+	USB_HIDUT_USAGE_GENERIC_DESKTOP_KEYBOARD = 6,
+	USB_HIDUT_USAGE_GENERIC_DESKTOP_KEYPAD = 7,
+	USB_HIDUT_USAGE_GENERIC_DESKTOP_X = 0x30,
+	USB_HIDUT_USAGE_GENERIC_DESKTOP_Y = 0x31,
+	USB_HIDUT_USAGE_GENERIC_DESKTOP_WHEEL = 0x38
+	/* USB_HIDUT_USAGE_GENERIC_DESKTOP_ = , */
+	
+} usb_hidut_usage_generic_desktop_t;
+
+typedef enum {
+	USB_HIDUT_USAGE_CONSUMER_CONSUMER_CONTROL = 1
+} usb_hidut_usage_consumer_t;
+
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/include/usb/hid/usages/kbdgen.h
===================================================================
--- uspace/lib/usbhid/include/usb/hid/usages/kbdgen.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/include/usb/hid/usages/kbdgen.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,175 @@
+/*
+ * Copyright (c) 2010 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhid
+ * @{
+ */
+/** @file
+ * @brief USB HID key codes.
+ * @details
+ * This is not a typical header as by default it is equal to empty file.
+ * However, by cleverly defining the USB_HIDUT_KBD_KEY you can use it
+ * to generate conversion tables etc.
+ *
+ * For example, this creates enum for known keys:
+ * @code
+#define USB_HIDUT_KBD_KEY(name, usage_id, l, lc, l1, l2) \
+	USB_KBD_KEY_##name = usage_id,
+typedef enum {
+	#include <usb/hidutkbd.h>
+} usb_key_code_t;
+ @endcode
+ *
+ * Maybe, it might be better that you would place such enums into separate
+ * files and create them as separate step before compiling to allow tools
+ * such as Doxygen get the definitions right.
+ *
+ * @warning This file does not include guard to prevent multiple inclusions
+ * into a single file.
+ */
+
+
+#ifndef USB_HIDUT_KBD_KEY
+/** Declare keyboard key.
+ * @param name Key name (identifier).
+ * @param usage_id Key code (see Keyboard/Keypad Page (0x07) in HUT1.12.
+ * @param letter Corresponding character (0 if not applicable).
+ * @param letter_caps Corresponding character with Caps on.
+ * @param letter_mod1 Corresponding character with modifier #1 on.
+ * @param letter_mod2 Corresponding character with modifier #2 on.
+ */
+#define USB_HIDUT_KBD_KEY(name, usage_id, letter, letter_caps, letter_mod1, letter_mod2)
+
+#endif
+
+#define __NONPRINT(name, usage_id) \
+	USB_HIDUT_KBD_KEY(name, usage_id, 0, 0, 0, 0)
+
+/* US alphabet letters */
+USB_HIDUT_KBD_KEY(A, 0x04, 'a', 'A', 0, 0)
+USB_HIDUT_KBD_KEY(B, 0x05, 'b', 'B', 0, 0)
+USB_HIDUT_KBD_KEY(C, 0x06, 'c', 'C', 0, 0)
+USB_HIDUT_KBD_KEY(D, 0x07, 'd', 'D', 0, 0)
+USB_HIDUT_KBD_KEY(E, 0x08, 'e', 'E', 0, 0)
+USB_HIDUT_KBD_KEY(F, 0x09, 'f', 'F', 0, 0)
+USB_HIDUT_KBD_KEY(G, 0x0A, 'g', 'G', 0, 0)
+USB_HIDUT_KBD_KEY(H, 0x0B, 'h', 'H', 0, 0)
+USB_HIDUT_KBD_KEY(I, 0x0C, 'i', 'I', 0, 0)
+USB_HIDUT_KBD_KEY(J, 0x0D, 'j', 'J', 0, 0)
+USB_HIDUT_KBD_KEY(K, 0x0E, 'k', 'K', 0, 0)
+USB_HIDUT_KBD_KEY(L, 0x0F, 'l', 'L', 0, 0)
+USB_HIDUT_KBD_KEY(M, 0x10, 'm', 'M', 0, 0)
+USB_HIDUT_KBD_KEY(N, 0x11, 'n', 'N', 0, 0)
+USB_HIDUT_KBD_KEY(O, 0x12, 'o', 'O', 0, 0)
+USB_HIDUT_KBD_KEY(P, 0x13, 'p', 'P', 0, 0)
+USB_HIDUT_KBD_KEY(Q, 0x14, 'q', 'Q', 0, 0)
+USB_HIDUT_KBD_KEY(R, 0x15, 'r', 'R', 0, 0)
+USB_HIDUT_KBD_KEY(S, 0x16, 's', 'S', 0, 0)
+USB_HIDUT_KBD_KEY(T, 0x17, 't', 'T', 0, 0)
+USB_HIDUT_KBD_KEY(U, 0x18, 'u', 'U', 0, 0)
+USB_HIDUT_KBD_KEY(V, 0x19, 'v', 'V', 0, 0)
+USB_HIDUT_KBD_KEY(W, 0x1A, 'w', 'W', 0, 0)
+USB_HIDUT_KBD_KEY(X, 0x1B, 'x', 'X', 0, 0)
+USB_HIDUT_KBD_KEY(Y, 0x1C, 'y', 'Y', 0, 0)
+USB_HIDUT_KBD_KEY(Z, 0x1D, 'z', 'Z', 0, 0)
+
+/* Keyboard digits */
+USB_HIDUT_KBD_KEY(1, 0x1E, '1', '!', 0, 0)
+USB_HIDUT_KBD_KEY(2, 0x1F, '2', '@', 0, 0)
+USB_HIDUT_KBD_KEY(3, 0x20, '3', '#', 0, 0)
+USB_HIDUT_KBD_KEY(4, 0x21, '4', '$', 0, 0)
+USB_HIDUT_KBD_KEY(5, 0x22, '5', '%', 0, 0)
+USB_HIDUT_KBD_KEY(6, 0x23, '6', '^', 0, 0)
+USB_HIDUT_KBD_KEY(7, 0x24, '7', '&', 0, 0)
+USB_HIDUT_KBD_KEY(8, 0x25, '8', '*', 0, 0)
+USB_HIDUT_KBD_KEY(9, 0x26, '9', '(', 0, 0)
+USB_HIDUT_KBD_KEY(0, 0x27, '0', ')', 0, 0)
+
+/* More-or-less typewriter command keys */
+USB_HIDUT_KBD_KEY(ENTER, 0x28, '\n', 0, 0, 0)
+USB_HIDUT_KBD_KEY(ESCAPE, 0x29, 0, 0, 0, 0)
+USB_HIDUT_KBD_KEY(BACKSPACE, 0x2A, '\b', 0, 0, 0)
+USB_HIDUT_KBD_KEY(TAB, 0x2B, '\t', 0, 0, 0)
+USB_HIDUT_KBD_KEY(SPACE, 0x2C, ' ', 0, 0, 0)
+
+/* Special (printable) characters */
+USB_HIDUT_KBD_KEY(DASH, 0x2D, '-', '_', 0, 0)
+USB_HIDUT_KBD_KEY(EQUALS, 0x2E, '=', '+', 0, 0)
+USB_HIDUT_KBD_KEY(LEFT_BRACKET, 0x2F, '[', '{', 0, 0)
+USB_HIDUT_KBD_KEY(RIGHT_BRACKET, 0x30, ']', '}', 0, 0)
+USB_HIDUT_KBD_KEY(BACKSLASH, 0x31, '\\', '|', 0, 0)
+USB_HIDUT_KBD_KEY(HASH, 0x32, '#', '~', 0, 0)
+USB_HIDUT_KBD_KEY(SEMICOLON, 0x33, ';', ':', 0, 0)
+USB_HIDUT_KBD_KEY(APOSTROPHE, 0x34, '\'', '"', 0, 0)
+USB_HIDUT_KBD_KEY(GRAVE_ACCENT, 0x35, '`', '~', 0, 0)
+USB_HIDUT_KBD_KEY(COMMA, 0x36, ',', '<', 0, 0)
+USB_HIDUT_KBD_KEY(PERIOD, 0x37, '.', '>', 0, 0)
+USB_HIDUT_KBD_KEY(SLASH, 0x38, '/', '?', 0, 0)
+
+USB_HIDUT_KBD_KEY(CAPS_LOCK, 0x39, 0, 0, 0, 0)
+
+/* Function keys */
+__NONPRINT( F1, 0x3A)
+__NONPRINT( F2, 0x3B)
+__NONPRINT( F3, 0x3C)
+__NONPRINT( F4, 0x3D)
+__NONPRINT( F5, 0x3E)
+__NONPRINT( F6, 0x3F)
+__NONPRINT( F7, 0x40)
+__NONPRINT( F8, 0x41)
+__NONPRINT( F9, 0x42)
+__NONPRINT(F10, 0x43)
+__NONPRINT(F11, 0x44)
+__NONPRINT(F12, 0x45)
+
+/* Cursor movement keys & co. */
+__NONPRINT(PRINT_SCREEN, 0x46)
+__NONPRINT(SCROLL_LOCK, 0x47)
+__NONPRINT(PAUSE, 0x48)
+__NONPRINT(INSERT, 0x49)
+__NONPRINT(HOME, 0x4A)
+__NONPRINT(PAGE_UP, 0x4B)
+__NONPRINT(DELETE, 0x4C)
+__NONPRINT(END, 0x4D)
+__NONPRINT(PAGE_DOWN, 0x4E)
+__NONPRINT(RIGHT_ARROW, 0x4F)
+__NONPRINT(LEFT_ARROW, 0x50)
+__NONPRINT(DOWN_ARROW, 0x51)
+__NONPRINT(UP_ARROW, 0x52)
+
+
+
+
+/* USB_HIDUT_KBD_KEY(, 0x, '', '', 0, 0) */
+
+#undef __NONPRINT
+
+/**
+ * @}
+ */
+
Index: uspace/lib/usbhid/include/usb/hid/usages/led.h
===================================================================
--- uspace/lib/usbhid/include/usb/hid/usages/led.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/include/usb/hid/usages/led.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2010 Lubos Slovak
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhid
+ * @{
+ */
+/** @file
+ * @brief USB HID Usage Tables - LED page.
+ */
+#ifndef LIBUSBHID_UTLED_H_
+#define LIBUSBHID_UTLED_H_
+
+typedef enum {
+	USB_HID_LED_UNDEFINED = 0,
+	USB_HID_LED_NUM_LOCK,
+	USB_HID_LED_CAPS_LOCK,
+	USB_HID_LED_SCROLL_LOCK,
+	USB_HID_LED_COMPOSE,
+	USB_HID_LED_KANA,
+	USB_HID_LED_POWER,
+	USB_HID_LED_SHIFT,
+	USB_HID_LED_DND,
+	USB_HID_LED_MUTE,
+	USB_HID_LED_TONE_ENABLE,
+	USB_HID_LED_HIGH_CUT_FILTER,
+	USB_HID_LED_LOW_CUT_FILTER,
+	USB_HID_LED_EQ_ENABLE,
+	USB_HID_LED_SOUND_FIELD_ON,
+	USB_HID_LED_SURROUND_ON,
+	USB_HID_LED_REPEAT,
+	USB_HID_LED_STEREO,
+	USB_HID_LED_SAMPLING_RATE_DETECT,
+	USB_HID_LED_SPINNING,
+	USB_HID_LED_CAV,
+	USB_HID_LED_CLV,
+	USB_HID_LED_RECORDING_FORMAT_DETECT,
+	USB_HID_LED_OFF_HOOK,
+	USB_HID_LED_RING,
+	USB_HID_LED_MESSAGE_WAITING,
+	USB_HID_LED_DATA_MODE,
+	USB_HID_LED_BATTERY_OPERATION,
+	USB_HID_LED_BATTERY_OK,
+	USB_HID_LED_BATTERY_LOW,
+	USB_HID_LED_SPEAKER,
+	USB_HID_LED_HEAD_SET,
+	USB_HID_LED_HOLD,
+	USB_HID_LED_MICRO,
+	USB_HID_LED_COVERAGE,
+	USB_HID_LED_NIGHT_MODE,
+	USB_HID_LED_SEND_CALLS,
+	USB_HID_LED_CALL_PICKUP,
+	USB_HID_LED_CONFERENCE,
+	USB_HID_LED_STAND_BY,
+	USB_HID_LED_CAMERA_ON,
+	USB_HID_LED_CAMERA_OFF,
+	USB_HID_LED_ON_LINE,
+	USB_HID_LED_OFF_LINE,
+	USB_HID_LED_BUSY,
+	USB_HID_LED_READY,
+	USB_HID_LED_PAPER_OUT,
+	USB_HID_LED_PAPER_JAM,
+	USB_HID_LED_REMOTE,
+	USB_HID_LED_FORWARD,
+	USB_HID_LED_REVERSE,
+	USB_HID_LED_STOP,
+	USB_HID_LED_REWIND,
+	USB_HID_LED_FAST_FORWARD,
+	USB_HID_LED_PLAY,
+	USB_HID_LED_PAUSE,
+	USB_HID_LED_RECORD,
+	USB_HID_LED_ERROR,
+	USB_HID_LED_USAGE_SELECTED_IND,
+	USB_HID_LED_USAGE_IN_USE_IND,
+	USB_HID_LED_USAGE_MULTI_MODE_IND,
+	USB_HID_LED_IND_ON,
+	USB_HID_LED_IND_FLASH,
+	USB_HID_LED_IND_SLOW_BLINK,
+	USB_HID_LED_IND_FAST_BLINK,
+	USB_HID_LED_IND_OFF,
+	USB_HID_LED_FLASH_ON_TIME,
+	USB_HID_LED_SLOW_BLINK_ON_TIME,
+	USB_HID_LED_SLOW_BLINK_OFF_TIME,
+	USB_HID_LED_FAST_BLINK_ON_TIME,
+	USB_HID_LED_FAST_BLINK_OFF_TIME,
+	USB_HID_LED_USAGE_IND_COLOR,
+	USB_HID_LED_IND_RED,
+	USB_HID_LED_IND_GREEN,
+	USB_HID_LED_IND_AMBER,
+	USB_HID_LED_GENERIC_IND,
+	USB_HID_LED_SYSTEM_SUSPEND,
+	USB_HID_LED_EXTERNAL_POWER
+} usb_hid_usage_led_t;
+
+#endif /* LIBUSB_UTLED_H_ */
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/src/consumer.c
===================================================================
--- uspace/lib/usbhid/src/consumer.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/src/consumer.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,732 @@
+/*
+ * Copyright (c) 2011 Lubos Slovak
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhid
+ * @{
+ */
+/** @file
+ * UUSB multimedia key usage, to string mapping.
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <usb/hid/usages/consumer.h>
+
+static const char *usbhid_consumer_usage_str[0x29d] = {
+	[0x01] = "Consumer Control",
+	[0x02] = "Numeric Key Pad",
+	[0x03] = "Programmable Buttons",
+	[0x04] = "Microphone",
+	[0x05] = "Headphone",
+	[0x06] = "Graphic Equalizer",
+	[0x07] = "Reserved",
+	[0x08] = "Reserved",
+	[0x09] = "Reserved",
+	[0x0a] = "Reserved",
+	[0x0b] = "Reserved",
+	[0x0c] = "Reserved",
+	[0x0d] = "Reserved",
+	[0x0e] = "Reserved",
+	[0x0f] = "Reserved",
+	[0x10] = "Reserved",
+	[0x11] = "Reserved",
+	[0x12] = "Reserved",
+	[0x13] = "Reserved",
+	[0x14] = "Reserved",
+	[0x15] = "Reserved",
+	[0x16] = "Reserved",
+	[0x17] = "Reserved",
+	[0x18] = "Reserved",
+	[0x19] = "Reserved",
+	[0x1a] = "Reserved",
+	[0x1b] = "Reserved",
+	[0x1c] = "Reserved",
+	[0x1d] = "Reserved",
+	[0x1e] = "Reserved",
+	[0x1f] = "Reserved",
+	[0x20] = "+10",
+	[0x21] = "+100",
+	[0x22] = "AM/PM",
+	[0x23] = "Reserved",
+	[0x24] = "Reserved",
+	[0x25] = "Reserved",
+	[0x26] = "Reserved",
+	[0x27] = "Reserved",
+	[0x28] = "Reserved",
+	[0x29] = "Reserved",
+	[0x2a] = "Reserved",
+	[0x2b] = "Reserved",
+	[0x2c] = "Reserved",
+	[0x2d] = "Reserved",
+	[0x2e] = "Reserved",
+	[0x2f] = "Reserved",
+	[0x30] = "Reserved",
+	[0x31] = "Reserved",
+	[0x32] = "Reserved",
+	[0x33] = "Reserved",
+	[0x34] = "Reserved",
+	[0x35] = "Reserved",
+	[0x36] = "Reserved",
+	[0x37] = "Reserved",
+	[0x38] = "Reserved",
+	[0x39] = "Reserved",
+	[0x3a] = "Reserved",
+	[0x3b] = "Reserved",
+	[0x3c] = "Reserved",
+	[0x3d] = "Reserved",
+	[0x3e] = "Reserved",
+	[0x3f] = "Reserved",
+	[0x40] = "Menu",
+	[0x41] = "Menu Pick",
+	[0x42] = "Menu Up",
+	[0x43] = "Menu Down",
+	[0x44] = "Menu Left",
+	[0x45] = "Menu Right",
+	[0x46] = "Menu Escape",
+	[0x47] = "Menu Value Increase",
+	[0x48] = "Menu Value Decrease",
+	[0x49] = "Reserved",
+	[0x4a] = "Reserved",
+	[0x4b] = "Reserved",
+	[0x4c] = "Reserved",
+	[0x4d] = "Reserved",
+	[0x4e] = "Reserved",
+	[0x4f] = "Reserved",
+	[0x50] = "Reserved",
+	[0x51] = "Reserved",
+	[0x52] = "Reserved",
+	[0x53] = "Reserved",
+	[0x54] = "Reserved",
+	[0x55] = "Reserved",
+	[0x56] = "Reserved",
+	[0x57] = "Reserved",
+	[0x58] = "Reserved",
+	[0x59] = "Reserved",
+	[0x5a] = "Reserved",
+	[0x5b] = "Reserved",
+	[0x5c] = "Reserved",
+	[0x5d] = "Reserved",
+	[0x5e] = "Reserved",
+	[0x5f] = "Reserved",
+	[0x60] = "Data On Screen",
+	[0x61] = "Closed Caption",
+	[0x62] = "Closed Caption Select",
+	[0x63] = "VCR/TV",
+	[0x64] = "Broadcast Mode",
+	[0x65] = "Snapshot",
+	[0x66] = "Still",
+	[0x67] = "Reserved",
+	[0x68] = "Reserved",
+	[0x69] = "Reserved",
+	[0x6a] = "Reserved",
+	[0x6b] = "Reserved",
+	[0x6c] = "Reserved",
+	[0x6d] = "Reserved",
+	[0x6e] = "Reserved",
+	[0x6f] = "Reserved",
+	[0x70] = "Reserved",
+	[0x71] = "Reserved",
+	[0x72] = "Reserved",
+	[0x73] = "Reserved",
+	[0x74] = "Reserved",
+	[0x75] = "Reserved",
+	[0x76] = "Reserved",
+	[0x77] = "Reserved",
+	[0x78] = "Reserved",
+	[0x79] = "Reserved",
+	[0x7a] = "Reserved",
+	[0x7b] = "Reserved",
+	[0x7c] = "Reserved",
+	[0x7d] = "Reserved",
+	[0x7e] = "Reserved",
+	[0x7f] = "Reserved",
+	[0x80] = "Selection",
+	[0x81] = "Assign Selection",
+	[0x82] = "Mode Step",
+	[0x83] = "Recall Last",
+	[0x84] = "Enter Channel",
+	[0x85] = "Order Movie",
+	[0x86] = "Channel",
+	[0x87] = "Media Selection",
+	[0x88] = "Media Select Computer",
+	[0x89] = "Media Select TV",
+	[0x8a] = "Media Select WWW",
+	[0x8b] = "Media Select DVD",
+	[0x8c] = "Media Select Telephone",
+	[0x8d] = "Media Select Program Guide",
+	[0x8e] = "Media Select Video Phone",
+	[0x8f] = "Media Select Games",
+	[0x90] = "Media Select Messages",
+	[0x91] = "Media Select CD",
+	[0x92] = "Media Select VCR",
+	[0x93] = "Media Select Tuner",
+	[0x94] = "Quit",
+	[0x95] = "Help",
+	[0x96] = "Media Select Tape",
+	[0x97] = "Media Select Cable",
+	[0x98] = "Media Select Satellite",
+	[0x99] = "Media Select Security",
+	[0x9a] = "Media Select Home",
+	[0x9b] = "Media Select Call",
+	[0x9c] = "Channel Increment",
+	[0x9d] = "Channel Decrement",
+	[0x9e] = "Media Select SAP",
+	[0x9f] = "Reserved",
+	[0xa0] = "VCR Plus",
+	[0xa1] = "Once",
+	[0xa2] = "Daily",
+	[0xa3] = "Weekly",
+	[0xa4] = "Monthly",
+	[0xa5] = "Reserved",
+	[0xa6] = "Reserved",
+	[0xa7] = "Reserved",
+	[0xa8] = "Reserved",
+	[0xa9] = "Reserved",
+	[0xaa] = "Reserved",
+	[0xab] = "Reserved",
+	[0xac] = "Reserved",
+	[0xad] = "Reserved",
+	[0xae] = "Reserved",
+	[0xaf] = "Reserved",
+	[0xb0] = "Play",
+	[0xb1] = "Pause",
+	[0xb2] = "Record",
+	[0xb3] = "Fast Forward",
+	[0xb4] = "Rewind",
+	[0xb5] = "Scan Next Track",
+	[0xb6] = "Scan Previous Trac",
+	[0xb7] = "Stop",
+	[0xb8] = "Eject",
+	[0xb9] = "Random Play",
+	[0xba] = "Select Disc",
+	[0xbb] = "Enter Disc",
+	[0xbc] = "Repeat",
+	[0xbd] = "Tracking",
+	[0xbe] = "Track Normal",
+	[0xbf] = "Slow Tracking",
+	[0xc0] = "Frame Forward",
+	[0xc1] = "Frame Back",
+	[0xc2] = "Mark",
+	[0xc3] = "Clear Mark",
+	[0xc4] = "Repeat From Mark",
+	[0xc5] = "Return to Mark",
+	[0xc6] = "Search Mark Forward",
+	[0xc7] = "Search Mark Backwards",
+	[0xc8] = "Counter Reset",
+	[0xc9] = "Show Counter",
+	[0xca] = "Tracking Increment",
+	[0xcb] = "Tracking Decrement",
+	[0xcc] = "Stop/Eject",
+	[0xcd] = "Play/Pause",
+	[0xce] = "Play/Skip",
+	[0xcf] = "Reserved",
+	[0xd0] = "Reserved",
+	[0xd1] = "Reserved",
+	[0xd2] = "Reserved",
+	[0xd3] = "Reserved",
+	[0xd4] = "Reserved",
+	[0xd5] = "Reserved",
+	[0xd6] = "Reserved",
+	[0xd7] = "Reserved",
+	[0xd8] = "Reserved",
+	[0xd9] = "Reserved",
+	[0xda] = "Reserved",
+	[0xdb] = "Reserved",
+	[0xdc] = "Reserved",
+	[0xdd] = "Reserved",
+	[0xde] = "Reserved",
+	[0xdf] = "Reserved",
+	[0xe0] = "Volume",
+	[0xe1] = "Balance",
+	[0xe2] = "Mute",
+	[0xe3] = "Bass",
+	[0xe4] = "Treble",
+	[0xe5] = "Bass Boost",
+	[0xe6] = "Surround Mode",
+	[0xe7] = "Loudness",
+	[0xe8] = "MPX",
+	[0xe9] = "Volume Increment",
+	[0xea] = "Volume Decrement",
+	[0xeb] = "Reserved",
+	[0xec] = "Reserved",
+	[0xed] = "Reserved",
+	[0xee] = "Reserved",
+	[0xef] = "Reserved",
+	[0xf0] = "Speed Select",
+	[0xf1] = "Playback Speed",
+	[0xf2] = "Standard Play",
+	[0xf3] = "Long Play",
+	[0xf4] = "Extended Play",
+	[0xf5] = "Slow",
+	[0xf6] = "Reserved",
+	[0xf7] = "Reserved",
+	[0xf8] = "Reserved",
+	[0xf9] = "Reserved",
+	[0xfa] = "Reserved",
+	[0xfb] = "Reserved",
+	[0xfc] = "Reserved",
+	[0xfd] = "Reserved",
+	[0xfe] = "Reserved",
+	[0xff] = "Reserved",
+	[0x100] = "Fan Enable",
+	[0x101] = "Fan Speed",
+	[0x102] = "Light Enable",
+	[0x103] = "Light Illumination Level",
+	[0x104] = "Climate Control Enable",
+	[0x105] = "Room Temperature",
+	[0x106] = "Security Enable",
+	[0x107] = "Fire Alarm",
+	[0x108] = "Police Alarm",
+	[0x109] = "Proximity",
+	[0x10a] = "Motion",
+	[0x10b] = "Duress Alarm",
+	[0x10c] = "Holdup Alarm",
+	[0x10d] = "Medical Alarm",
+	[0x10e] = "Reserved",
+	[0x10f] = "Reserved",
+	[0x110] = "Reserved",
+	[0x111] = "Reserved",
+	[0x112] = "Reserved",
+	[0x113] = "Reserved",
+	[0x114] = "Reserved",
+	[0x115] = "Reserved",
+	[0x116] = "Reserved",
+	[0x117] = "Reserved",
+	[0x118] = "Reserved",
+	[0x119] = "Reserved",
+	[0x11a] = "Reserved",
+	[0x11b] = "Reserved",
+	[0x11c] = "Reserved",
+	[0x11d] = "Reserved",
+	[0x11e] = "Reserved",
+	[0x11f] = "Reserved",
+	[0x120] = "Reserved", 
+	[0x121] = "Reserved",
+	[0x122] = "Reserved",
+	[0x123] = "Reserved",
+	[0x124] = "Reserved",
+	[0x125] = "Reserved",
+	[0x126] = "Reserved",
+	[0x127] = "Reserved",
+	[0x128] = "Reserved",
+	[0x129] = "Reserved",
+	[0x12a] = "Reserved",
+	[0x12b] = "Reserved",
+	[0x12c] = "Reserved",
+	[0x12d] = "Reserved",
+	[0x12e] = "Reserved",
+	[0x12f] = "Reserved",
+	[0x130] = "Reserved", 
+	[0x131] = "Reserved",
+	[0x132] = "Reserved",
+	[0x133] = "Reserved",
+	[0x134] = "Reserved",
+	[0x135] = "Reserved",
+	[0x136] = "Reserved",
+	[0x137] = "Reserved",
+	[0x138] = "Reserved",
+	[0x139] = "Reserved",
+	[0x13a] = "Reserved",
+	[0x13b] = "Reserved",
+	[0x13c] = "Reserved",
+	[0x13d] = "Reserved",
+	[0x13e] = "Reserved",
+	[0x13f] = "Reserved",
+	[0x140] = "Reserved", 
+	[0x141] = "Reserved",
+	[0x142] = "Reserved",
+	[0x143] = "Reserved",
+	[0x144] = "Reserved",
+	[0x145] = "Reserved",
+	[0x146] = "Reserved",
+	[0x147] = "Reserved",
+	[0x148] = "Reserved",
+	[0x149] = "Reserved",
+	[0x14a] = "Reserved",
+	[0x14b] = "Reserved",
+	[0x14c] = "Reserved",
+	[0x14d] = "Reserved",
+	[0x14e] = "Reserved",
+	[0x14f] = "Reserved",
+	[0x150] = "Balance Right",
+	[0x151] = "Balance Left",
+	[0x152] = "Bass Increment",
+	[0x153] = "Bass Decrement",
+	[0x154] = "Treble Increment",
+	[0x155] = "Treble Decrement",
+	[0x156] = "Reserved",
+	[0x157] = "Reserved",
+	[0x158] = "Reserved",
+	[0x159] = "Reserved",
+	[0x15a] = "Reserved",
+	[0x15b] = "Reserved",
+	[0x15c] = "Reserved",
+	[0x15d] = "Reserved",
+	[0x15e] = "Reserved",
+	[0x15f] = "Reserved",
+	[0x160] = "Speaker System",
+	[0x161] = "Channel Left",
+	[0x162] = "Channel Right",
+	[0x163] = "Channel Center",
+	[0x164] = "Channel Front",
+	[0x165] = "Channel Center Front",
+	[0x166] = "Channel Side",
+	[0x167] = "Channel Surround",
+	[0x168] = "Channel Low Frequency Enhancement",
+	[0x169] = "Channel Top",
+	[0x16a] = "Channel Unknown",
+	[0x16b] = "Reserved",
+	[0x16c] = "Reserved",
+	[0x16d] = "Reserved",
+	[0x16e] = "Reserved",
+	[0x16f] = "Reserved",
+	[0x170] = "Sub-channel",
+	[0x171] = "Sub-channel Increment",
+	[0x172] = "Sub-channel Decrement",
+	[0x173] = "Alternate Audio Increment",
+	[0x174] = "Alternate Audio Decrement",
+	[0x175] = "Reserved",
+	[0x176] = "Reserved",
+	[0x177] = "Reserved",
+	[0x178] = "Reserved",
+	[0x179] = "Reserved",
+	[0x17a] = "Reserved",
+	[0x17b] = "Reserved",
+	[0x17c] = "Reserved",
+	[0x17d] = "Reserved",
+	[0x17e] = "Reserved",
+	[0x17f] = "Reserved",
+	[0x180] = "Application Launch Buttons",
+	[0x181] = "AL Launch Buttion Configuration Tool",
+	[0x182] = "AL Programmable Button Configuration",
+	[0x183] = "AL Consumer Control Configuration",
+	[0x184] = "AL Word Processor",
+	[0x185] = "AL Text Editor",
+	[0x186] = "AL Spreadsheet",
+	[0x187] = "AL Graphics Editor",
+	[0x188] = "AL Presentation App",
+	[0x189] = "AL Database App",
+	[0x18a] = "AL Email Reader",
+	[0x18b] = "AL Newsreader",
+	[0x18c] = "AL Voicemail",
+	[0x18d] = "AL Contacts/Address Book",
+	[0x18e] = "AL Calendar/Schedule",
+	[0x18f] = "AL Task/Project Manager",
+	[0x190] = "AL Log/Journal/Timecard",
+	[0x191] = "AL Checkbook/Finance",
+	[0x192] = "AL Calculator",
+	[0x193] = "AL A/V Capture/Playback",
+	[0x194] = "AL Local Machine Browser",
+	[0x195] = "AL LAN/WAN Browser",
+	[0x196] = "AL Internet Browser",
+	[0x197] = "AL Remote Networking/ISP Connect",
+	[0x198] = "AL Network Conference",
+	[0x199] = "AL Network Chat",
+	[0x19a] = "AL Telephony/Dialer",
+	[0x19b] = "AL Logon",
+	[0x19c] = "AL Logoff",
+	[0x19d] = "AL Logon/Logoff",
+	[0x19e] = "AL Terminal Lock/Screensaver",
+	[0x19f] = "AL Control Panel",
+	[0x1a0] = "AL Command Line Processor/Run",
+	[0x1a1] = "AL Process/Task Manager",
+	[0x1a2] = "AL Select Task/Application",
+	[0x1a3] = "AL Next Task/Application",
+	[0x1a4] = "AL Previous Task/Application",
+	[0x1a5] = "AL Preemptive Halt Task/Application",
+	[0x1a6] = "AL Integrated Help Center",
+	[0x1a7] = "AL Documents",
+	[0x1a8] = "AL Thesaurus",
+	[0x1a9] = "AL Dictionary",
+	[0x1aa] = "AL Desktop",
+	[0x1ab] = "AL Spell Check",
+	[0x1ac] = "AL Grammar Check",
+	[0x1ad] = "AL Wireless Status",
+	[0x1ae] = "AL Keyboard Layout",
+	[0x1af] = "AL Virus Protection",
+	[0x1b0] = "AL Encryption",
+	[0x1b1] = "AL Screen Saver",
+	[0x1b2] = "AL Alarms",
+	[0x1b3] = "AL Clock",
+	[0x1b4] = "AL File Browser",
+	[0x1b5] = "AL Power Status",
+	[0x1b6] = "AL Image Browser",
+	[0x1b7] = "AL Audio Browser",
+	[0x1b8] = "AL Movie Browser",
+	[0x1b9] = "AL Digital Rights Manager",
+	[0x1ba] = "AL Digital Wallet",
+	[0x1bb] = "Reserved",
+	[0x1bc] = "AL Instant Messaging",
+	[0x1bd] = "AL OEM Features Tips/Tutorial Browser",
+	[0x1be] = "AL OEM Help",
+	[0x1bf] = "AL Online Community",
+	[0x1c0] = "AL Entertainment Content Browser",
+	[0x1c1] = "AL Online Shopping Browser",
+	[0x1c2] = "AL SmartCard Information/Help",
+	[0x1c3] = "AL Market Monitor/Finance Browser",
+	[0x1c4] = "AL Customized Corporate News Browser",
+	[0x1c5] = "AL Online Activity Browser",
+	[0x1c6] = "AL Research/Search Browser",
+	[0x1c7] = "AL Audio Player",
+	[0x1c8] = "Reserved",
+	[0x1c9] = "Reserved",
+	[0x1ca] = "Reserved",
+	[0x1cb] = "Reserved",
+	[0x1cc] = "Reserved",
+	[0x1cd] = "Reserved",
+	[0x1ce] = "Reserved",
+	[0x1cf] = "Reserved",
+	[0x1d0] = "Reserved",
+	[0x1d1] = "Reserved",
+	[0x1d2] = "Reserved",
+	[0x1d3] = "Reserved",
+	[0x1d4] = "Reserved",
+	[0x1d5] = "Reserved",
+	[0x1d6] = "Reserved",
+	[0x1d7] = "Reserved",
+	[0x1d8] = "Reserved",
+	[0x1d9] = "Reserved",
+	[0x1da] = "Reserved",
+	[0x1db] = "Reserved",
+	[0x1dc] = "Reserved",
+	[0x1dd] = "Reserved",
+	[0x1de] = "Reserved",
+	[0x1df] = "Reserved",
+	[0x1e0] = "Reserved",
+	[0x1e1] = "Reserved",
+	[0x1e2] = "Reserved",
+	[0x1e3] = "Reserved",
+	[0x1e4] = "Reserved",
+	[0x1e5] = "Reserved",
+	[0x1e6] = "Reserved",
+	[0x1e7] = "Reserved",
+	[0x1e8] = "Reserved",
+	[0x1e9] = "Reserved",
+	[0x1ea] = "Reserved",
+	[0x1eb] = "Reserved",
+	[0x1ec] = "Reserved",
+	[0x1ed] = "Reserved",
+	[0x1ee] = "Reserved",
+	[0x1ef] = "Reserved",
+	[0x1f0] = "Reserved",
+	[0x1f1] = "Reserved",
+	[0x1f2] = "Reserved",
+	[0x1f3] = "Reserved",
+	[0x1f4] = "Reserved",
+	[0x1f5] = "Reserved",
+	[0x1f6] = "Reserved",
+	[0x1f7] = "Reserved",
+	[0x1f8] = "Reserved",
+	[0x1f9] = "Reserved",
+	[0x1fa] = "Reserved",
+	[0x1fb] = "Reserved",
+	[0x1fc] = "Reserved",
+	[0x1fd] = "Reserved",
+	[0x1fe] = "Reserved",
+	[0x1ff] = "Reserved",
+	[0x200] = "Generic GUI Application Controls",
+	[0x201] = "AC New",
+	[0x202] = "AC Open",
+	[0x203] = "AC Close",
+	[0x204] = "AC Exit",
+	[0x205] = "AC Maximize",
+	[0x206] = "AC Minimize",
+	[0x207] = "AC Save",
+	[0x208] = "AC Print",
+	[0x209] = "AC Properties",
+	[0x20a] = "",
+	[0x20b] = "",
+	[0x20c] = "",
+	[0x20d] = "",
+	[0x20e] = "",
+	[0x20f] = "",
+	[0x210] = "",
+	[0x211] = "",
+	[0x212] = "",
+	[0x213] = "",
+	[0x214] = "",
+	[0x215] = "",
+	[0x216] = "",
+	[0x217] = "",
+	[0x218] = "",
+	[0x219] = "",
+	[0x21a] = "AC Undo",
+	[0x21b] = "AC Copy",
+	[0x21c] = "AC Cut",
+	[0x21d] = "AC Paste",
+	[0x21e] = "AC Select All",
+	[0x21f] = "AC Find",
+	[0x220] = "AC Find and Replace",
+	[0x221] = "AC Search",
+	[0x222] = "AC Go To",
+	[0x223] = "AC Home",
+	[0x224] = "AC Back",
+	[0x225] = "AC Forward",
+	[0x226] = "AC Stop",
+	[0x227] = "AC Refresh",
+	[0x228] = "AC Previous Link",
+	[0x229] = "AC Next Link",
+	[0x22a] = "AC Bookmarks",
+	[0x22b] = "AC History",
+	[0x22c] = "AC Subscriptions",
+	[0x22d] = "AC Zoom In",
+	[0x22e] = "AC Zoom Out",
+	[0x22f] = "AC Zoom",
+	[0x230] = "AC Full Screen View",
+	[0x231] = "AC Normal View",
+	[0x232] = "AC View Toggle",
+	[0x233] = "AC Scroll Up",
+	[0x234] = "AC Scroll Down",
+	[0x235] = "AC Scroll",
+	[0x236] = "AC Pan Left",
+	[0x237] = "AC Pan Right",
+	[0x238] = "AC Pan",
+	[0x239] = "AC New Window",
+	[0x23a] = "AC Tile Horizontally",
+	[0x23b] = "AC Tile Vertically",
+	[0x23c] = "AC Format",
+	[0x23d] = "AC Edit",
+	[0x23e] = "AC Bold",
+	[0x23f] = "AC Italics",
+	[0x240] = "AC Undeline",
+	[0x241] = "AC Strikethrough",
+	[0x242] = "AC Subscript",
+	[0x243] = "AC Superscript",
+	[0x244] = "AC All Caps",
+	[0x245] = "AC Rotate",
+	[0x246] = "AC Resize",
+	[0x247] = "AC Flip Horizontal",
+	[0x248] = "AC Flip Vertical",
+	[0x249] = "AC Mirror Horizontal",
+	[0x24a] = "AC Mirror Vertical",
+	[0x24b] = "AC Font Select",
+	[0x24c] = "AC Font Color",
+	[0x24d] = "AC Font Size",
+	[0x24e] = "AC Justify Left",
+	[0x24f] = "AC Justify Center H",
+	[0x250] = "AC Justify Right",
+	[0x251] = "AC Justify Block H",
+	[0x252] = "AC Justify Top",
+	[0x253] = "AC Justify Center V",
+	[0x254] = "AC Justify Bottom",
+	[0x255] = "AC Justify Block V",
+	[0x256] = "AC Indent Decrease",
+	[0x257] = "AC Indent Increase",
+	[0x258] = "AC Numbered List",
+	[0x259] = "AC Restart Numbering",
+	[0x25a] = "AC Bulleted List",
+	[0x25b] = "AC Promote",
+	[0x25c] = "AC Demote",
+	[0x25d] = "AC Yes",
+	[0x25e] = "AC No",
+	[0x25f] = "AC Cancel",
+	[0x260] = "AC Catalog",
+	[0x261] = "AC Buy/Checkout",
+	[0x262] = "AC Add to Cart",
+	[0x263] = "AC Expand",
+	[0x264] = "AC Expand All",
+	[0x265] = "AC Collapse",
+	[0x266] = "AC Collapse All",
+	[0x267] = "AC Print Preview",
+	[0x268] = "AC Paste Special",
+	[0x269] = "AC Insert Mode",
+	[0x26a] = "AC Delete",
+	[0x26b] = "AC Lock",
+	[0x26c] = "AC Unlock",
+	[0x26d] = "AC Protect",
+	[0x26e] = "AC Unprotect",
+	[0x26f] = "AC Attach Comment",
+	[0x270] = "AC Delete Comment",
+	[0x271] = "AC View Comment",
+	[0x272] = "AC Select Word",
+	[0x273] = "AC Select Sentence",
+	[0x274] = "AC Select Paragraph",
+	[0x275] = "AC Select Column",
+	[0x276] = "AC Select Row",
+	[0x277] = "AC Select Table",
+	[0x278] = "AC Select Object",
+	[0x279] = "AC Redo/Repeat",
+	[0x27a] = "AC Sort",
+	[0x27b] = "AC Sort Ascending",
+	[0x27c] = "AC Sort Descending",
+	[0x27d] = "AC Filter",
+	[0x27e] = "AC Set Clock",
+	[0x27f] = "AC View Clock",
+	[0x280] = "AC Select Time Zone",
+	[0x281] = "AC Edit Time Zones",
+	[0x282] = "AC Set Alarm",
+	[0x283] = "AC Clear Alarm",
+	[0x284] = "AC Snooze Alarm",
+	[0x285] = "AC Reset Alarm",
+	[0x286] = "AC Synchronize",
+	[0x287] = "AC Send/Receive",
+	[0x288] = "AC Send To",
+	[0x289] = "AC Reply",
+	[0x28a] = "AC Reply All",
+	[0x28b] = "AC Forward Msg",
+	[0x28c] = "AC Send",
+	[0x28d] = "AC Attach File",
+	[0x28e] = "AC Upload",
+	[0x28f] = "AC Download (Save Target As)",
+	[0x290] = "AC Set Borders",
+	[0x291] = "AC Insert Row",
+	[0x292] = "AC Insert Column",
+	[0x293] = "AC Insert File",
+	[0x294] = "AC Insert Picture",
+	[0x295] = "AC Insert Object",
+	[0x296] = "AC Insert Symbol",
+	[0x297] = "AC Save and Close",
+	[0x298] = "AC Rename",
+	[0x299] = "AC Merge",
+	[0x29a] = "AC Split",
+	[0x29b] = "AC Distrubute Horizontally",
+	[0x29c] = "AC Distrubute Vertically"
+};
+
+/**
+ * Translates USB HID Usages from the Consumer Page into their string 
+ * representation.
+ *
+ * @param usage USB HID Consumer Page Usage number.
+ * 
+ * @retval HelenOS key code corresponding to the given USB Consumer Page Usage.
+ */
+const char *usbhid_multimedia_usage_to_str(int usage)
+{
+	size_t map_length = sizeof(usbhid_consumer_usage_str) / sizeof(char *);
+
+	if ((usage < 0) || ((size_t)usage >= map_length))
+		return "Unknown usage";
+
+	/*! @todo What if the usage is not in the table? */
+	return usbhid_consumer_usage_str[usage];
+}
+
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/src/hiddescriptor.c
===================================================================
--- uspace/lib/usbhid/src/hiddescriptor.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/src/hiddescriptor.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,1068 @@
+/*
+ * Copyright (c) 2011 Matej Klonfar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhid
+ * @{
+ */
+/** @file
+ * HID report descriptor and report data parser implementation.
+ */
+#include <usb/hid/hidparser.h>
+#include <errno.h>
+#include <stdio.h>
+#include <malloc.h>
+#include <mem.h>
+#include <usb/debug.h>
+#include <assert.h>
+
+/*---------------------------------------------------------------------------*/
+/*
+ * Constants defining current parsing mode for correct parsing of the set of
+ * local tags (usage) enclosed in delimter tags.
+ */
+/**
+ * Second delimiter tag was read. The set of local items (usage) ended.
+ */
+#define OUTSIDE_DELIMITER_SET	0
+
+/**
+ * First delimiter tag was read. The set of local items (usage) started.
+ */
+#define START_DELIMITER_SET	1
+
+/**
+ * Parser is in the set of local items.
+ */
+#define INSIDE_DELIMITER_SET	2
+
+/*---------------------------------------------------------------------------*/
+	
+/** The new report item flag. Used to determine when the item is completly
+ * configured and should be added to the report structure
+ */
+#define USB_HID_NEW_REPORT_ITEM 1
+
+/** No special action after the report descriptor tag is processed should be
+ * done
+ */
+#define USB_HID_NO_ACTION	2
+
+#define USB_HID_RESET_OFFSET	3
+
+/** Unknown tag was founded in report descriptor data*/
+#define USB_HID_UNKNOWN_TAG		-99
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Checks if given collection path is already present in report structure and
+ * inserts it if not.
+ *
+ * @param report Report structure 
+ * @param cmp_path The collection path 
+ * @return Pointer to the result collection path in report structure.
+ * @retval NULL If some error occurs
+ */
+usb_hid_report_path_t *usb_hid_report_path_try_insert(
+		usb_hid_report_t *report, usb_hid_report_path_t *cmp_path) {
+	
+	link_t *path_it = report->collection_paths.prev->next;
+	usb_hid_report_path_t *path = NULL;
+	
+	if((report == NULL) || (cmp_path == NULL)) {
+		return NULL;
+	}
+	
+	while(path_it != &report->collection_paths) {
+		path = list_get_instance(path_it, usb_hid_report_path_t,
+				link);
+		
+		if(usb_hid_report_compare_usage_path(path, cmp_path,
+					USB_HID_PATH_COMPARE_STRICT) == EOK){
+			break;
+		}			
+		path_it = path_it->next;
+	}
+	if(path_it == &report->collection_paths) {
+		path = usb_hid_report_path_clone(cmp_path);
+		if(path == NULL) {
+			return NULL;
+		}
+		list_append(&path->link, &report->collection_paths);					
+		report->collection_paths_count++;
+
+		return path;
+	}
+	else {
+		return list_get_instance(path_it, usb_hid_report_path_t,
+				link); 
+	}
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Initialize the report descriptor parser structure
+ *
+ * @param parser Report descriptor parser structure
+ * @return Error code
+ * @retval EINVAL If no report structure was given
+ * @retval EOK If report structure was successfully initialized
+ */
+int usb_hid_report_init(usb_hid_report_t *report)
+{
+	if(report == NULL) {
+		return EINVAL;
+	}
+
+	memset(report, 0, sizeof(usb_hid_report_t));
+	list_initialize(&report->reports);
+	list_initialize(&report->collection_paths);
+
+	report->use_report_ids = 0;
+    return EOK;   
+}
+
+/*---------------------------------------------------------------------------*/
+
+/**
+ *
+ *
+ * @param report Report structure in which the new report items should be
+ * 		 stored
+ * @param report_item Current report descriptor's parsing state table 
+ * @return Error code
+ * @retval EOK If all fields were successfully append to report
+ * @retval EINVAL If invalid parameters (NULL) was given
+ * @retval ENOMEM If there is no memmory to store new report description
+ *
+ */
+int usb_hid_report_append_fields(usb_hid_report_t *report,
+		usb_hid_report_item_t *report_item) {
+
+	usb_hid_report_field_t *field;
+	int i;
+
+	uint32_t *usages;
+	int usages_used=0;
+
+	if((report == NULL) || (report_item == NULL)) {
+		return EINVAL;
+	}
+
+	if(report_item->usages_count > 0){
+		usages = malloc(sizeof(int32_t) * report_item->usages_count);
+		memcpy(usages, report_item->usages, sizeof(int32_t) *
+				report_item->usages_count); 
+	}
+	else {
+		usages = NULL;
+	}
+	
+	usb_hid_report_path_t *path = report_item->usage_path;	
+	for(i=0; i<report_item->count; i++){
+
+		field = malloc(sizeof(usb_hid_report_field_t));
+		if(field == NULL) {
+			return ENOMEM;
+		}
+
+		memset(field, 0, sizeof(usb_hid_report_field_t));
+		list_initialize(&field->link);
+
+		/* fill the attributes */		
+		field->logical_minimum = report_item->logical_minimum;
+		field->logical_maximum = report_item->logical_maximum;
+		field->physical_minimum = report_item->physical_minimum;
+		field->physical_maximum = report_item->physical_maximum;
+
+		if(USB_HID_ITEM_FLAG_VARIABLE(report_item->item_flags) == 0){
+			/* 
+			Store usage array. The Correct Usage Page and Usage is
+			depending on data in report and will be filled later
+			*/
+			field->usage = 0;
+			field->usage_page = 0; //report_item->usage_page;
+
+			field->usages_count = report_item->usages_count;
+			field->usages = usages;
+			usages_used = 1;
+		}
+		else {
+
+			/* Fill the correct Usage and Usage Page */
+			int32_t usage;
+			if(i < report_item->usages_count) {
+				usage = report_item->usages[i];
+			}
+			else {
+				usage = report_item->usages[
+					report_item->usages_count- 1]; 
+			}
+
+			if(USB_HID_IS_EXTENDED_USAGE(usage)){
+				field->usage = USB_HID_EXTENDED_USAGE(usage);
+				field->usage_page = 
+					USB_HID_EXTENDED_USAGE_PAGE(usage);
+			}
+			else {
+				// should not occur
+				field->usage = usage;
+				field->usage_page = report_item->usage_page;
+			}
+		}
+		
+		usb_hid_report_set_last_item(path, USB_HID_TAG_CLASS_GLOBAL,
+				field->usage_page);
+		usb_hid_report_set_last_item(path, USB_HID_TAG_CLASS_LOCAL,
+				field->usage);
+
+		field->collection_path =
+			usb_hid_report_path_try_insert(report, path);
+
+		field->size = report_item->size;
+
+		if(report_item->type == USB_HID_REPORT_TYPE_INPUT) {
+			int offset = report_item->offset + report_item->size * i;
+			int field_offset = (offset/8)*8 + (offset/8 + 1) * 8 - 
+				offset - report_item->size;
+			if(field_offset < 0) {
+				field->offset = 0;
+			}
+			else {
+				field->offset = field_offset;
+			}
+		}
+		else {
+			field->offset = report_item->offset + (i * report_item->size);
+		}
+
+
+		if(report->use_report_ids != 0) {
+			field->offset += 8;
+			report->use_report_ids = 1;
+		}
+
+		field->item_flags = report_item->item_flags;
+
+		/* find the right report list*/
+		usb_hid_report_description_t *report_des;
+		report_des = usb_hid_report_find_description(report,
+			report_item->id, report_item->type);
+		
+		if(report_des == NULL){
+			report_des = malloc(
+				sizeof(usb_hid_report_description_t));
+			if(report_des == NULL) {
+				return ENOMEM;
+			}
+
+			memset(report_des, 0,
+				sizeof(usb_hid_report_description_t));
+
+			report_des->type = report_item->type;
+			report_des->report_id = report_item->id;
+			if(report_des->report_id != 0) {
+				/* set up the bit length by report_id field */
+				report_des->bit_length = 8;
+			}
+
+			list_initialize (&report_des->link);
+			list_initialize (&report_des->report_items);
+
+			list_append(&report_des->link, &report->reports);
+			report->report_count++;
+		}
+
+		/* append this field to the end of founded report list */
+		list_append (&field->link, &report_des->report_items);
+		
+		/* update the sizes */
+		report_des->bit_length += field->size;
+		report_des->item_length++;
+
+	}
+
+	// free only when not used!!!
+	if(usages && usages_used == 0) {
+		free(usages);
+	}
+
+	return EOK;
+}
+/*---------------------------------------------------------------------------*/
+/**
+ * Finds description of report with given report_id and of given type in
+ * opaque report structure.
+ *
+ * @param report Opaque structure containing the parsed report descriptor
+ * @param report_id ReportId of report we are searching
+ * @param type Type of report we are searching
+ * @return Pointer to the particular report description
+ * @retval NULL If no description is founded
+ */
+usb_hid_report_description_t * usb_hid_report_find_description(
+		const usb_hid_report_t *report, uint8_t report_id,
+		usb_hid_report_type_t type) {
+
+	if(report == NULL) {
+		return NULL;
+	}
+
+	link_t *report_it = report->reports.next;
+	usb_hid_report_description_t *report_des = NULL;
+	
+	while(report_it != &report->reports) {
+		report_des = list_get_instance(report_it,
+				usb_hid_report_description_t, link);
+
+		// if report id not set, return the first of the type
+		if(((report_des->report_id == report_id) || (report_id == 0)) && 
+		   (report_des->type == type)) { 
+			return report_des;
+		}
+		
+		report_it = report_it->next;
+	}
+
+	return NULL;
+}
+/*---------------------------------------------------------------------------*/
+
+/** Parse HID report descriptor.
+ *
+ * @param parser Opaque HID report parser structure.
+ * @param data Data describing the report.
+ * @return Error code.
+ * @retval ENOMEM If no more memmory is available
+ * @retval EINVAL If invalid data are founded
+ * @retval EOK If report descriptor is successfully parsed
+ */
+int usb_hid_parse_report_descriptor(usb_hid_report_t *report, 
+    const uint8_t *data, size_t size)
+{
+	size_t i=0;
+	uint8_t tag=0;
+	uint8_t item_size=0;
+	int class=0;
+	int ret;
+	usb_hid_report_item_t *report_item=0;
+	usb_hid_report_item_t *new_report_item;	
+	usb_hid_report_path_t *usage_path;
+
+	size_t offset_input=0;
+	size_t offset_output=0;
+	size_t offset_feature=0;
+
+	link_t stack;
+	list_initialize(&stack);	
+
+	/* parser structure initialization*/
+	if(usb_hid_report_init(report) != EOK) {
+		return EINVAL;
+	}
+	
+	/*report item initialization*/
+	if(!(report_item=malloc(sizeof(usb_hid_report_item_t)))){
+		return ENOMEM;
+	}
+	memset(report_item, 0, sizeof(usb_hid_report_item_t));
+	list_initialize(&(report_item->link));	
+
+	/* usage path context initialization */
+	if(!(usage_path=usb_hid_report_path())){
+		return ENOMEM;
+	}
+	usb_hid_report_path_append_item(usage_path, 0, 0);	
+	
+	while(i<size){	
+		if(!USB_HID_ITEM_IS_LONG(data[i])){
+
+			if((i+USB_HID_ITEM_SIZE(data[i]))>= size){
+				return EINVAL;
+			}
+			
+			tag = USB_HID_ITEM_TAG(data[i]);
+			item_size = USB_HID_ITEM_SIZE(data[i]);
+			class = USB_HID_ITEM_TAG_CLASS(data[i]);
+			
+			ret = usb_hid_report_parse_tag(tag,class,data+i+1,
+				item_size,report_item, usage_path);
+
+			switch(ret){
+			case USB_HID_NEW_REPORT_ITEM:
+				/* store report item to report and create the
+				 * new one store current collection path
+				 */
+				report_item->usage_path = usage_path;
+					
+				usb_hid_report_path_set_report_id(
+				     report_item->usage_path, report_item->id);
+				
+				if(report_item->id != 0){
+					report->use_report_ids = 1;
+				}
+					
+				switch(tag) {
+				case USB_HID_REPORT_TAG_INPUT:
+					report_item->type = 
+					    USB_HID_REPORT_TYPE_INPUT;
+
+					report_item->offset = offset_input;
+					offset_input += report_item->count * 
+					    report_item->size;
+					break;
+	
+				case USB_HID_REPORT_TAG_OUTPUT:
+					report_item->type = 
+					    USB_HID_REPORT_TYPE_OUTPUT;
+					
+					report_item->offset = offset_output;
+					offset_output += report_item->count * 
+					    report_item->size;
+					break;
+	
+				case USB_HID_REPORT_TAG_FEATURE:
+					report_item->type = 
+					    USB_HID_REPORT_TYPE_FEATURE;
+
+					report_item->offset = offset_feature;
+					offset_feature += report_item->count * 
+						report_item->size;
+					break;
+	
+				default:
+					usb_log_debug2(
+					    "\tjump over - tag %X\n", tag);
+				    	break;
+				}
+					
+				/* 
+				 * append new fields to the report structure 					 
+				 */
+				usb_hid_report_append_fields(report, 
+				    report_item);
+
+				/* reset local items */
+				usb_hid_report_reset_local_items (report_item);
+				break;
+
+			case USB_HID_RESET_OFFSET:
+				offset_input = 0;
+				offset_output = 0;
+				offset_feature = 0;
+				usb_hid_report_path_set_report_id (usage_path, 
+				    report_item->id);
+				break;
+
+			case USB_HID_REPORT_TAG_PUSH:
+				// push current state to stack
+				new_report_item = usb_hid_report_item_clone(
+				    report_item);
+				
+				usb_hid_report_path_t *tmp_path = 
+				    usb_hid_report_path_clone(usage_path);
+
+				new_report_item->usage_path = tmp_path; 
+
+				list_prepend (&new_report_item->link, &stack);
+				break;
+			case USB_HID_REPORT_TAG_POP:
+				// restore current state from stack
+				if(list_empty (&stack)) {
+					return EINVAL;
+				}
+				free(report_item);
+						
+				report_item = list_get_instance(stack.next, 
+				    usb_hid_report_item_t, link);
+					
+				usb_hid_report_usage_path_t *tmp_usage_path;
+				tmp_usage_path = list_get_instance(
+				    report_item->usage_path->link.prev, 
+				    usb_hid_report_usage_path_t, link);
+					
+				usb_hid_report_set_last_item(usage_path, 
+				    USB_HID_TAG_CLASS_GLOBAL, tmp_usage_path->usage_page);
+				
+				usb_hid_report_set_last_item(usage_path, 
+				    USB_HID_TAG_CLASS_LOCAL, tmp_usage_path->usage);
+
+				usb_hid_report_path_free(report_item->usage_path);
+				list_initialize(&report_item->usage_path->link);
+				list_remove (stack.next);
+					
+				break;
+					
+			default:
+				// nothing special to do					
+				break;
+			}
+
+			/* jump over the processed block */
+			i += 1 + USB_HID_ITEM_SIZE(data[i]);
+		}
+		else{
+			// TBD
+			i += 3 + USB_HID_ITEM_SIZE(data[i+1]);
+		}
+		
+
+	}
+	
+	return EOK;
+}
+
+/*---------------------------------------------------------------------------*/
+
+/**
+ * Parse one tag of the report descriptor
+ *
+ * @param Tag to parse
+ * @param Report descriptor buffer
+ * @param Size of data belongs to this tag
+ * @param Current report item structe
+ * @return Code of action to be done next
+ */
+int usb_hid_report_parse_tag(uint8_t tag, uint8_t class, const uint8_t *data,
+	size_t item_size, usb_hid_report_item_t *report_item,
+	usb_hid_report_path_t *usage_path) {	
+	
+	int ret;
+	
+	switch(class){
+	case USB_HID_TAG_CLASS_MAIN:
+
+		if((ret=usb_hid_report_parse_main_tag(tag, data, item_size,
+			report_item, usage_path)) == EOK) {
+
+			return USB_HID_NEW_REPORT_ITEM;
+		}
+		else {
+			return ret;
+		}
+		break;
+
+	case USB_HID_TAG_CLASS_GLOBAL:	
+		return usb_hid_report_parse_global_tag(tag, data, item_size,
+			report_item, usage_path);
+		break;
+
+	case USB_HID_TAG_CLASS_LOCAL:			
+		return usb_hid_report_parse_local_tag(tag, data, item_size,
+			report_item, usage_path);
+		break;
+	
+	default:
+		return USB_HID_NO_ACTION;
+	}
+}
+
+/**
+ * Parse main tags of report descriptor
+ *
+ * @param Tag identifier
+ * @param Data buffer
+ * @param Length of data buffer
+ * @param Current state table
+ * @return Error code
+ */
+
+int usb_hid_report_parse_main_tag(uint8_t tag, const uint8_t *data, 
+	size_t item_size, usb_hid_report_item_t *report_item,
+	usb_hid_report_path_t *usage_path)
+{
+	usb_hid_report_usage_path_t *path_item;
+	
+	switch(tag)
+	{
+	case USB_HID_REPORT_TAG_INPUT:
+	case USB_HID_REPORT_TAG_OUTPUT:
+	case USB_HID_REPORT_TAG_FEATURE:
+		report_item->item_flags = *data;			
+		return EOK;			
+		break;
+			
+	case USB_HID_REPORT_TAG_COLLECTION:
+
+		/* store collection atributes */
+		path_item = list_get_instance(usage_path->head.prev, 
+			usb_hid_report_usage_path_t, link);
+		path_item->flags = *data;	
+			
+		/* set last item */
+		usb_hid_report_set_last_item(usage_path, 
+			USB_HID_TAG_CLASS_GLOBAL, 
+			USB_HID_EXTENDED_USAGE_PAGE(report_item->usages[
+				report_item->usages_count-1]));
+
+		usb_hid_report_set_last_item(usage_path, 
+			USB_HID_TAG_CLASS_LOCAL, 
+			USB_HID_EXTENDED_USAGE(report_item->usages[
+				report_item->usages_count-1]));
+			
+		/* append the new one which will be set by common usage/usage
+		 * page */
+		usb_hid_report_path_append_item(usage_path, 
+			report_item->usage_page, 
+			report_item->usages[report_item->usages_count-1]);
+
+		usb_hid_report_reset_local_items (report_item);
+		return USB_HID_NO_ACTION;
+		break;
+			
+	case USB_HID_REPORT_TAG_END_COLLECTION:
+		usb_hid_report_remove_last_item(usage_path);
+		return USB_HID_NO_ACTION;
+		break;
+
+	default:
+		return USB_HID_NO_ACTION;
+	}
+
+	return EOK;
+}
+
+/**
+ * Parse global tags of report descriptor
+ *
+ * @param Tag identifier
+ * @param Data buffer
+ * @param Length of data buffer
+ * @param Current state table
+ * @return Error code
+ */
+int usb_hid_report_parse_global_tag(uint8_t tag, const uint8_t *data, 
+	size_t item_size, usb_hid_report_item_t *report_item, 
+	usb_hid_report_path_t *usage_path) { 
+	
+	switch(tag)
+	{
+	case USB_HID_REPORT_TAG_USAGE_PAGE:
+		report_item->usage_page = 
+			usb_hid_report_tag_data_uint32(data, item_size);
+		break;
+
+	case USB_HID_REPORT_TAG_LOGICAL_MINIMUM:
+		report_item->logical_minimum = USB_HID_UINT32_TO_INT32(
+			usb_hid_report_tag_data_uint32(data,item_size),
+		       	item_size * 8);
+		break;
+
+	case USB_HID_REPORT_TAG_LOGICAL_MAXIMUM:
+		report_item->logical_maximum = USB_HID_UINT32_TO_INT32(
+			usb_hid_report_tag_data_uint32(data,item_size), 
+			item_size * 8);
+		break;
+
+	case USB_HID_REPORT_TAG_PHYSICAL_MINIMUM:
+		report_item->physical_minimum = USB_HID_UINT32_TO_INT32(
+			usb_hid_report_tag_data_uint32(data,item_size), 
+			item_size * 8);
+		break;			
+
+	case USB_HID_REPORT_TAG_PHYSICAL_MAXIMUM:
+		report_item->physical_maximum = USB_HID_UINT32_TO_INT32(
+			usb_hid_report_tag_data_uint32(data,item_size), 
+			item_size * 8);
+		break;
+
+	case USB_HID_REPORT_TAG_UNIT_EXPONENT:
+		report_item->unit_exponent = usb_hid_report_tag_data_uint32(
+			data,item_size);
+		break;
+
+	case USB_HID_REPORT_TAG_UNIT:
+		report_item->unit = usb_hid_report_tag_data_uint32(
+			data,item_size);
+		break;
+
+	case USB_HID_REPORT_TAG_REPORT_SIZE:
+		report_item->size = usb_hid_report_tag_data_uint32(
+			data,item_size);
+		break;
+
+	case USB_HID_REPORT_TAG_REPORT_COUNT:
+		report_item->count = usb_hid_report_tag_data_uint32(
+			data,item_size);
+		break;
+
+	case USB_HID_REPORT_TAG_REPORT_ID:
+		report_item->id = usb_hid_report_tag_data_uint32(data, 
+			item_size);
+		return USB_HID_RESET_OFFSET;
+		break;
+	
+	case USB_HID_REPORT_TAG_PUSH:
+	case USB_HID_REPORT_TAG_POP:
+		/* 
+		 * stack operations are done in top level parsing
+		 * function
+		 */
+		return tag;
+		break;
+			
+	default:
+		return USB_HID_NO_ACTION;
+	}
+
+	return EOK;
+}
+
+/**
+ * Parse local tags of report descriptor
+ *
+ * @param Tag identifier
+ * @param Data buffer
+ * @param Length of data buffer
+ * @param Current state table
+ * @return Error code
+ */
+int usb_hid_report_parse_local_tag(uint8_t tag, const uint8_t *data, 
+	size_t item_size, usb_hid_report_item_t *report_item, 
+	usb_hid_report_path_t *usage_path)
+{
+	int32_t extended_usage;
+	
+	switch(tag) {
+	case USB_HID_REPORT_TAG_USAGE:
+		switch(report_item->in_delimiter) {
+		case INSIDE_DELIMITER_SET:
+			/* nothing to do
+			 * we catch only the first one
+			 */
+			break;
+	
+		case START_DELIMITER_SET:
+			report_item->in_delimiter = INSIDE_DELIMITER_SET;
+		case OUTSIDE_DELIMITER_SET:
+			extended_usage = ((report_item->usage_page) << 16);
+			extended_usage += usb_hid_report_tag_data_uint32(
+				data,item_size);
+
+			report_item->usages[report_item->usages_count] = 
+				extended_usage;
+
+			report_item->usages_count++;
+			break;
+		}
+		break;
+		
+	case USB_HID_REPORT_TAG_USAGE_MINIMUM:			
+		if (item_size == 3) {
+			// usage extended usages
+			report_item->extended_usage_page = 
+			    USB_HID_EXTENDED_USAGE_PAGE(
+			    usb_hid_report_tag_data_uint32(data,item_size));
+			   
+
+			report_item->usage_minimum = 
+			    USB_HID_EXTENDED_USAGE(
+			    usb_hid_report_tag_data_uint32(data,item_size));
+		}
+		else {
+			report_item->usage_minimum = 
+			    usb_hid_report_tag_data_uint32(data,item_size);
+		}
+		break;
+	
+	case USB_HID_REPORT_TAG_USAGE_MAXIMUM:
+		if (item_size == 3) {
+			if(report_item->extended_usage_page != 
+			    USB_HID_EXTENDED_USAGE_PAGE(	
+			    usb_hid_report_tag_data_uint32(data,item_size))) {
+				
+				return EINVAL;
+			}
+				
+			// usage extended usages
+			report_item->extended_usage_page = 
+				USB_HID_EXTENDED_USAGE_PAGE(
+				usb_hid_report_tag_data_uint32(data,item_size));
+
+			report_item->usage_maximum = 
+				USB_HID_EXTENDED_USAGE(
+				usb_hid_report_tag_data_uint32(data,item_size));
+		}
+		else {
+			report_item->usage_maximum = 
+				usb_hid_report_tag_data_uint32(data,item_size);
+		}
+
+		// vlozit zaznamy do pole usages
+		int32_t i;
+		for(i = report_item->usage_minimum; 
+		    i <= report_item->usage_maximum; i++) {
+
+			if(report_item->extended_usage_page) {
+			    report_item->usages[report_item->usages_count++] = 
+				(report_item->extended_usage_page << 16) + i;
+			}
+			else {			
+			    report_item->usages[report_item->usages_count++] = 
+				(report_item->usage_page << 16) + i;
+			}
+		}
+		report_item->extended_usage_page = 0;
+			
+		break;
+		
+	case USB_HID_REPORT_TAG_DESIGNATOR_INDEX:
+		report_item->designator_index = 
+			usb_hid_report_tag_data_uint32(data,item_size);
+		break;
+	
+	case USB_HID_REPORT_TAG_DESIGNATOR_MINIMUM:
+		report_item->designator_minimum = 
+			usb_hid_report_tag_data_uint32(data,item_size);
+		break;
+
+	case USB_HID_REPORT_TAG_DESIGNATOR_MAXIMUM:
+		report_item->designator_maximum = 
+			usb_hid_report_tag_data_uint32(data,item_size);
+		break;
+
+	case USB_HID_REPORT_TAG_STRING_INDEX:
+		report_item->string_index = 
+			usb_hid_report_tag_data_uint32(data,item_size);
+		break;
+
+	case USB_HID_REPORT_TAG_STRING_MINIMUM:
+		report_item->string_minimum = 
+			usb_hid_report_tag_data_uint32(data,item_size);
+		break;
+
+	case USB_HID_REPORT_TAG_STRING_MAXIMUM:
+		report_item->string_maximum = 
+			usb_hid_report_tag_data_uint32(data,item_size);
+		break;			
+
+	case USB_HID_REPORT_TAG_DELIMITER:
+		report_item->in_delimiter = 
+			usb_hid_report_tag_data_uint32(data,item_size);
+		break;
+
+	default:
+		return USB_HID_NO_ACTION;
+	}
+
+	return EOK;
+}
+/*---------------------------------------------------------------------------*/
+
+/**
+ * Converts raw data to uint32 (thats the maximum length of short item data)
+ *
+ * @param Data buffer
+ * @param Size of buffer
+ * @return Converted int32 number
+ */
+uint32_t usb_hid_report_tag_data_uint32(const uint8_t *data, size_t size)
+{
+	unsigned int i;
+	uint32_t result;
+
+	result = 0;
+	for(i=0; i<size; i++) {
+		result = (result | (data[i]) << (i*8));
+	}
+
+	return result;
+}
+/*---------------------------------------------------------------------------*/
+
+/**
+ * Prints content of given list of report items.
+ *
+ * @param List of report items (usb_hid_report_item_t)
+ * @return void
+ */
+void usb_hid_descriptor_print_list(link_t *head)
+{
+	usb_hid_report_field_t *report_item;
+	link_t *item;
+
+
+	if(head == NULL || list_empty(head)) {
+	    usb_log_debug("\tempty\n");
+	    return;
+	}
+        
+	for(item = head->next; item != head; item = item->next) {
+                
+		report_item = list_get_instance(item, usb_hid_report_field_t, 
+				link);
+
+		usb_log_debug("\t\tOFFSET: %X\n", report_item->offset);
+		usb_log_debug("\t\tSIZE: %zu\n", report_item->size);
+		usb_log_debug("\t\tLOGMIN: %d\n", 
+			report_item->logical_minimum);
+		usb_log_debug("\t\tLOGMAX: %d\n", 
+			report_item->logical_maximum);		
+		usb_log_debug("\t\tPHYMIN: %d\n", 
+			report_item->physical_minimum);		
+		usb_log_debug("\t\tPHYMAX: %d\n", 
+			report_item->physical_maximum);				
+		usb_log_debug("\t\ttUSAGEMIN: %X\n", 
+			report_item->usage_minimum);
+		usb_log_debug("\t\tUSAGEMAX: %X\n",
+			       report_item->usage_maximum);
+		usb_log_debug("\t\tUSAGES COUNT: %zu\n", 
+			report_item->usages_count);
+
+		usb_log_debug("\t\tVALUE: %X\n", report_item->value);
+		usb_log_debug("\t\ttUSAGE: %X\n", report_item->usage);
+		usb_log_debug("\t\tUSAGE PAGE: %X\n", report_item->usage_page);
+		
+		usb_hid_print_usage_path(report_item->collection_path);
+
+		usb_log_debug("\n");		
+
+	}
+
+}
+/*---------------------------------------------------------------------------*/
+
+/**
+ * Prints content of given report descriptor in human readable format.
+ *
+ * @param parser Parsed descriptor to print
+ * @return void
+ */
+void usb_hid_descriptor_print(usb_hid_report_t *report)
+{
+	if(report == NULL) {
+		return;
+	}
+
+	link_t *report_it = report->reports.next;
+	usb_hid_report_description_t *report_des;
+
+	while(report_it != &report->reports) {
+		report_des = list_get_instance(report_it, 
+			usb_hid_report_description_t, link);
+		usb_log_debug("Report ID: %d\n", report_des->report_id);
+		usb_log_debug("\tType: %d\n", report_des->type);
+		usb_log_debug("\tLength: %zu\n", report_des->bit_length);		
+		usb_log_debug("\tB Size: %zu\n",
+			usb_hid_report_byte_size(report, 
+				report_des->report_id, 
+				report_des->type));
+		usb_log_debug("\tItems: %zu\n", report_des->item_length);		
+
+		usb_hid_descriptor_print_list(&report_des->report_items);
+
+		report_it = report_it->next;
+	}
+}
+/*---------------------------------------------------------------------------*/
+
+/**
+ * Releases whole linked list of report items
+ *
+ * @param head Head of list of report descriptor items (usb_hid_report_item_t)
+ * @return void
+ */
+void usb_hid_free_report_list(link_t *head)
+{
+	return; 
+	
+	usb_hid_report_item_t *report_item;
+	link_t *next;
+	
+	if(head == NULL || list_empty(head)) {		
+	    return;
+	}
+	
+	next = head->next;
+	while(next != head) {
+	
+	    report_item = list_get_instance(next, usb_hid_report_item_t, link);
+
+		while(!list_empty(&report_item->usage_path->link)) {
+		    usb_hid_report_remove_last_item(report_item->usage_path);
+		}
+
+		
+	    next = next->next;
+	    
+	    free(report_item);
+	}
+	
+	return;
+	
+}
+/*---------------------------------------------------------------------------*/
+
+/** Frees the HID report descriptor parser structure 
+ *
+ * @param parser Opaque HID report parser structure
+ * @return void
+ */
+void usb_hid_free_report(usb_hid_report_t *report)
+{
+	if(report == NULL){
+		return;
+	}
+
+	// free collection paths
+	usb_hid_report_path_t *path;
+	while(!list_empty(&report->collection_paths)) {
+		path = list_get_instance(report->collection_paths.next, 
+				usb_hid_report_path_t, link);
+
+		usb_hid_report_path_free(path);		
+	}
+	
+	// free report items
+	usb_hid_report_description_t *report_des;
+	usb_hid_report_field_t *field;
+	while(!list_empty(&report->reports)) {
+		report_des = list_get_instance(report->reports.next, 
+				usb_hid_report_description_t, link);
+
+		list_remove(&report_des->link);
+		
+		while(!list_empty(&report_des->report_items)) {
+			field = list_get_instance(
+				report_des->report_items.next, 
+				usb_hid_report_field_t, link);
+
+			list_remove(&field->link);
+
+			free(field);
+		}
+		
+		free(report_des);
+	}
+	
+	return;
+}
+/*---------------------------------------------------------------------------*/
+
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/src/hidiface.c
===================================================================
--- uspace/lib/usbhid/src/hidiface.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/src/hidiface.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,238 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhid
+ * @{
+ */
+/** @file
+ * Client functions for accessing USB HID interface (implementation).
+ */
+#include <dev_iface.h>
+#include <usbhid_iface.h>
+#include <usb/hid/iface.h>
+#include <errno.h>
+#include <str_error.h>
+#include <async.h>
+#include <assert.h>
+
+/** Ask for event array length.
+ *
+ * @param dev_sess Session to DDF device providing USB HID interface.
+ *
+ * @return Number of usages returned or negative error code.
+ *
+ */
+int usbhid_dev_get_event_length(async_sess_t *dev_sess, size_t *size)
+{
+	if (!dev_sess)
+		return EINVAL;
+	
+	async_exch_t *exch = async_exchange_begin(dev_sess);
+	
+	sysarg_t len;
+	int rc = async_req_1_1(exch, DEV_IFACE_ID(USBHID_DEV_IFACE),
+	    IPC_M_USBHID_GET_EVENT_LENGTH, &len);
+	
+	async_exchange_end(exch);
+	
+	if (rc == EOK) {
+		if (size != NULL)
+			*size = (size_t) len;
+	}
+	
+	return rc;
+}
+
+/** Request for next event from HID device.
+ *
+ * @param[in]  dev_sess    Session to DDF device providing USB HID interface.
+ * @param[out] usage_pages Where to store usage pages.
+ * @param[out] usages      Where to store usages (actual data).
+ * @param[in]  usage_count Length of @p usage_pages and @p usages buffer
+ *                         (in items, not bytes).
+ * @param[out] actual_usage_count Number of usages actually returned by the
+ *                                device driver.
+ * @param[in] flags        Flags (see USBHID_IFACE_FLAG_*).
+ *
+ * @return Error code.
+ *
+ */
+int usbhid_dev_get_event(async_sess_t *dev_sess, uint8_t *buf,
+    size_t size, size_t *actual_size, int *event_nr, unsigned int flags)
+{
+	if (!dev_sess)
+		return EINVAL;
+	
+	if ((buf == NULL))
+		return ENOMEM;
+	
+	if (size == 0)
+		return EINVAL;
+	
+	size_t buffer_size =  size;
+	uint8_t *buffer = malloc(buffer_size);
+	if (buffer == NULL)
+		return ENOMEM;
+	
+	async_exch_t *exch = async_exchange_begin(dev_sess);
+	
+	ipc_call_t opening_request_call;
+	aid_t opening_request = async_send_2(exch,
+	    DEV_IFACE_ID(USBHID_DEV_IFACE), IPC_M_USBHID_GET_EVENT,
+	    flags, &opening_request_call);
+	
+	if (opening_request == 0) {
+		async_exchange_end(exch);
+		free(buffer);
+		return ENOMEM;
+	}
+	
+	ipc_call_t data_request_call;
+	aid_t data_request = async_data_read(exch, buffer, buffer_size,
+	    &data_request_call);
+	
+	async_exchange_end(exch);
+	
+	if (data_request == 0) {
+		async_wait_for(opening_request, NULL);
+		free(buffer);
+		return ENOMEM;
+	}
+	
+	sysarg_t data_request_rc;
+	sysarg_t opening_request_rc;
+	async_wait_for(data_request, &data_request_rc);
+	async_wait_for(opening_request, &opening_request_rc);
+	
+	if (data_request_rc != EOK) {
+		/* Prefer return code of the opening request. */
+		if (opening_request_rc != EOK)
+			return (int) opening_request_rc;
+		else
+			return (int) data_request_rc;
+	}
+	
+	if (opening_request_rc != EOK)
+		return (int) opening_request_rc;
+	
+	size_t act_size = IPC_GET_ARG2(data_request_call);
+	
+	/* Copy the individual items. */
+	memcpy(buf, buffer, act_size);
+	
+	if (actual_size != NULL)
+		*actual_size = act_size;
+	
+	if (event_nr != NULL)
+		*event_nr = IPC_GET_ARG1(opening_request_call);
+	
+	return EOK;
+}
+
+int usbhid_dev_get_report_descriptor_length(async_sess_t *dev_sess,
+    size_t *size)
+{
+	if (!dev_sess)
+		return EINVAL;
+	
+	async_exch_t *exch = async_exchange_begin(dev_sess);
+	
+	sysarg_t arg_size;
+	int rc = async_req_1_1(exch, DEV_IFACE_ID(USBHID_DEV_IFACE),
+	    IPC_M_USBHID_GET_REPORT_DESCRIPTOR_LENGTH, &arg_size);
+	
+	async_exchange_end(exch);
+	
+	if (rc == EOK) {
+		if (size != NULL)
+			*size = (size_t) arg_size;
+	}
+	
+	return rc;
+}
+
+int usbhid_dev_get_report_descriptor(async_sess_t *dev_sess, uint8_t *buf,
+    size_t size, size_t *actual_size)
+{
+	if (!dev_sess)
+		return EINVAL;
+	
+	if ((buf == NULL))
+		return ENOMEM;
+	
+	if (size == 0)
+		return EINVAL;
+	
+	async_exch_t *exch = async_exchange_begin(dev_sess);
+	
+	aid_t opening_request = async_send_1(exch,
+	    DEV_IFACE_ID(USBHID_DEV_IFACE), IPC_M_USBHID_GET_REPORT_DESCRIPTOR,
+	    NULL);
+	if (opening_request == 0) {
+		async_exchange_end(exch);
+		return ENOMEM;
+	}
+	
+	ipc_call_t data_request_call;
+	aid_t data_request = async_data_read(exch, buf, size,
+	    &data_request_call);
+	
+	async_exchange_end(exch);
+	
+	if (data_request == 0) {
+		async_wait_for(opening_request, NULL);
+		return ENOMEM;
+	}
+	
+	sysarg_t data_request_rc;
+	sysarg_t opening_request_rc;
+	async_wait_for(data_request, &data_request_rc);
+	async_wait_for(opening_request, &opening_request_rc);
+	
+	if (data_request_rc != EOK) {
+		/* Prefer return code of the opening request. */
+		if (opening_request_rc != EOK)
+			return (int) opening_request_rc;
+		else
+			return (int) data_request_rc;
+	}
+	
+	if (opening_request_rc != EOK)
+		return (int) opening_request_rc;
+	
+	size_t act_size = IPC_GET_ARG2(data_request_call);
+	
+	if (actual_size != NULL)
+		*actual_size = act_size;
+	
+	return EOK;
+}
+
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/src/hidparser.c
===================================================================
--- uspace/lib/usbhid/src/hidparser.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/src/hidparser.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,666 @@
+/*
+ * Copyright (c) 2011 Matej Klonfar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhid
+ * @{
+ */
+/** @file
+ * USB HID report data parser implementation.
+ */
+#include <usb/hid/hidparser.h>
+#include <errno.h>
+#include <stdio.h>
+#include <malloc.h>
+#include <mem.h>
+#include <usb/debug.h>
+#include <assert.h>
+
+/*---------------------------------------------------------------------------*/
+/*
+ * Data translation private functions
+ */
+uint32_t usb_hid_report_tag_data_uint32(const uint8_t *data, size_t size);
+
+int usb_hid_translate_data(usb_hid_report_field_t *item, const uint8_t *data);
+
+uint32_t usb_hid_translate_data_reverse(usb_hid_report_field_t *item, 
+	int32_t value);
+
+int usb_pow(int a, int b);
+
+/*---------------------------------------------------------------------------*/
+
+// TODO: tohle ma bejt asi jinde
+int usb_pow(int a, int b)
+{
+	switch(b) {
+	case 0:
+		return 1;
+		break;
+	case 1:
+		return a;
+		break;
+	default:
+		return a * usb_pow(a, b-1);
+		break;
+	}
+}
+/*---------------------------------------------------------------------------*/
+
+/** Returns size of report of specified report id and type in items
+ *
+ * @param parser Opaque report parser structure
+ * @param report_id 
+ * @param type
+ * @return Number of items in specified report
+ */
+size_t usb_hid_report_size(usb_hid_report_t *report, uint8_t report_id, 
+                           usb_hid_report_type_t type)
+{
+	usb_hid_report_description_t *report_des;
+
+	if(report == NULL) {
+		return 0;
+	}
+
+	report_des = usb_hid_report_find_description (report, report_id, type);
+	if(report_des == NULL){
+		return 0;
+	}
+	else {
+		return report_des->item_length;
+	}
+}
+
+/** Returns size of report of specified report id and type in bytes
+ *
+ * @param parser Opaque report parser structure
+ * @param report_id 
+ * @param type
+ * @return Number of items in specified report
+ */
+size_t usb_hid_report_byte_size(usb_hid_report_t *report, uint8_t report_id, 
+                           usb_hid_report_type_t type)
+{
+	usb_hid_report_description_t *report_des;
+
+	if(report == NULL) {
+		return 0;
+	}
+
+	report_des = usb_hid_report_find_description (report, report_id, type);
+	if(report_des == NULL){
+		return 0;
+	}
+	else {
+		return ((report_des->bit_length + 7) / 8) ;
+	}
+}
+/*---------------------------------------------------------------------------*/
+
+/** Parse and act upon a HID report.
+ *
+ * @see usb_hid_parse_report_descriptor
+ *
+ * @param parser Opaque HID report parser structure.
+ * @param data Data for the report.
+ * @return Error code.
+ */ 
+int usb_hid_parse_report(const usb_hid_report_t *report, const uint8_t *data, 
+	size_t size, uint8_t *report_id)
+{
+	link_t *list_item;
+	usb_hid_report_field_t *item;
+
+	usb_hid_report_description_t *report_des;
+	usb_hid_report_type_t type = USB_HID_REPORT_TYPE_INPUT;
+	
+	if(report == NULL) {
+		return EINVAL;
+	}
+
+	if(report->use_report_ids != 0) {
+		*report_id = data[0];
+	}	
+	else {
+		*report_id = 0;
+	}
+
+
+	report_des = usb_hid_report_find_description(report, *report_id, 
+		type);
+
+	if(report_des == NULL) {
+		return EINVAL;
+	}
+
+	/* read data */
+	list_item = report_des->report_items.next;	   
+	while(list_item != &(report_des->report_items)) {
+
+		item = list_get_instance(list_item, usb_hid_report_field_t, 
+				link);
+
+		if(USB_HID_ITEM_FLAG_CONSTANT(item->item_flags) == 0) {
+			
+			if(USB_HID_ITEM_FLAG_VARIABLE(item->item_flags) == 0){
+
+				// array
+				item->value = 
+					usb_hid_translate_data(item, data);
+		
+				item->usage = USB_HID_EXTENDED_USAGE(
+				    item->usages[
+				    item->value - item->physical_minimum]);
+
+				item->usage_page = 
+				    USB_HID_EXTENDED_USAGE_PAGE(
+				    item->usages[
+				    item->value - item->physical_minimum]);
+
+				usb_hid_report_set_last_item (
+				    item->collection_path, 
+				    USB_HID_TAG_CLASS_GLOBAL, 
+				    item->usage_page);
+
+				usb_hid_report_set_last_item (
+				    item->collection_path, 
+				    USB_HID_TAG_CLASS_LOCAL, item->usage);
+				
+			}
+			else {
+				// variable item
+				item->value = usb_hid_translate_data(item, 
+				    data);				
+			}			
+		}
+		list_item = list_item->next;
+	}
+	
+	return EOK;
+	
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Translate data from the report as specified in report descriptor item
+ *
+ * @param item Report descriptor item with definition of translation
+ * @param data Data to translate
+ * @return Translated data
+ */
+int usb_hid_translate_data(usb_hid_report_field_t *item, const uint8_t *data)
+{
+	int resolution;
+	int offset;
+	int part_size;
+	
+	int32_t value=0;
+	int32_t mask=0;
+	const uint8_t *foo=0;
+
+	// now only shot tags are allowed
+	if(item->size > 32) {
+		return 0;
+	}
+
+	if((item->physical_minimum == 0) && (item->physical_maximum == 0)){
+		item->physical_minimum = item->logical_minimum;
+		item->physical_maximum = item->logical_maximum;			
+	}
+	
+
+	if(item->physical_maximum == item->physical_minimum){
+	    resolution = 1;
+	}
+	else {
+	    resolution = (item->logical_maximum - item->logical_minimum) / 
+		((item->physical_maximum - item->physical_minimum) * 
+		(usb_pow(10,(item->unit_exponent))));
+	}
+
+	offset = item->offset;
+	// FIXME
+	if((size_t)(offset/8) != (size_t)((offset+item->size-1)/8)) {
+		
+		part_size = 0;
+
+		size_t i=0;
+		for(i=(size_t)(offset/8); i<=(size_t)(offset+item->size-1)/8; i++){
+			if(i == (size_t)(offset/8)) {
+				// the higher one
+				part_size = 8 - (offset % 8);
+				foo = data + i;
+				mask =  ((1 << (item->size-part_size))-1);
+				value = (*foo & mask);
+			}
+			else if(i == ((offset+item->size-1)/8)){
+				// the lower one
+				foo = data + i;
+				mask = ((1 << (item->size - part_size)) - 1) 
+					<< (8 - (item->size - part_size));
+
+				value = (((*foo & mask) >> (8 - 
+				    (item->size - part_size))) << part_size ) 
+				    + value;
+			}
+			else {
+				value = (*(data + 1) << (part_size + 8)) + value;
+				part_size += 8;
+			}
+		}
+	}
+	else {		
+		foo = data+(offset/8);
+		mask =  ((1 << item->size)-1) << (8-((offset%8)+item->size));
+		value = (*foo & mask) >> (8-((offset%8)+item->size));
+	}
+
+	if((item->logical_minimum < 0) || (item->logical_maximum < 0)){
+		value = USB_HID_UINT32_TO_INT32(value, item->size);
+	}
+
+	return (int)(((value - item->logical_minimum) / resolution) + 
+		item->physical_minimum);
+	
+}
+
+/*---------------------------------------------------------------------------*/
+/* OUTPUT API */
+
+/** 
+ * Allocates output report buffer for output report
+ *
+ * @param parser Report parsed structure
+ * @param size Size of returned buffer
+ * @param report_id Report id of created output report
+ * @return Returns allocated output buffer for specified output
+ */
+uint8_t *usb_hid_report_output(usb_hid_report_t *report, size_t *size, 
+	uint8_t report_id)
+{
+	if(report == NULL) {
+		*size = 0;
+		return NULL;
+	}
+
+	link_t *report_it = report->reports.next;
+	usb_hid_report_description_t *report_des = NULL;
+	while(report_it != &report->reports) {
+		report_des = list_get_instance(report_it, 
+			usb_hid_report_description_t, link);
+		
+		if((report_des->report_id == report_id) && 
+			(report_des->type == USB_HID_REPORT_TYPE_OUTPUT)){
+			break;
+		}
+
+		report_it = report_it->next;
+	}
+
+	if(report_des == NULL){
+		*size = 0;
+		return NULL;
+	}
+	else {
+		*size = (report_des->bit_length + (8 - 1))/8;
+		uint8_t *ret = malloc((*size) * sizeof(uint8_t));
+		memset(ret, 0, (*size) * sizeof(uint8_t));
+		return ret;
+	}
+}
+
+
+/** Frees output report buffer
+ *
+ * @param output Output report buffer
+ * @return void
+ */
+void usb_hid_report_output_free(uint8_t *output)
+
+{
+	if(output != NULL) {
+		free (output);
+	}
+}
+
+/** Makes the output report buffer for data given in the report structure
+ *
+ * @param parser Opaque report parser structure
+ * @param path Usage path specifing which parts of output will be set
+ * @param flags Usage path structure comparison flags
+ * @param buffer Output buffer
+ * @param size Size of output buffer
+ * @return Error code
+ */
+int usb_hid_report_output_translate(usb_hid_report_t *report, 
+	uint8_t report_id, uint8_t *buffer, size_t size)
+{
+	link_t *item;	
+	int32_t value=0;
+	int offset;
+	int length;
+	int32_t tmp_value;
+	
+	if(report == NULL) {
+		return EINVAL;
+	}
+
+	if(report->use_report_ids != 0) {
+		buffer[0] = report_id;		
+	}
+
+	usb_hid_report_description_t *report_des;
+	report_des = usb_hid_report_find_description (report, report_id, 
+		USB_HID_REPORT_TYPE_OUTPUT);
+	
+	if(report_des == NULL){
+		return EINVAL;
+	}
+
+	usb_hid_report_field_t *report_item;	
+	item = report_des->report_items.next;	
+	while(item != &report_des->report_items) {
+		report_item = list_get_instance(item, usb_hid_report_field_t, link);
+
+		value = usb_hid_translate_data_reverse(report_item, 
+			report_item->value);
+
+		offset = report_des->bit_length - report_item->offset - 1;
+		length = report_item->size;
+		
+		usb_log_debug("\ttranslated value: %x\n", value);
+
+		if((offset/8) == ((offset+length-1)/8)) {
+			// je to v jednom bytu
+			if(((size_t)(offset/8) >= size) || 
+				((size_t)(offset+length-1)/8) >= size) {
+				break; // TODO ErrorCode
+			}
+			size_t shift = 8 - offset%8 - length;
+			value = value << shift;							
+			value = value & (((1 << length)-1) << shift);
+				
+			uint8_t mask = 0;
+			mask = 0xff - (((1 << length) - 1) << shift);
+			buffer[offset/8] = (buffer[offset/8] & mask) | value;
+		}
+		else {
+			int i = 0;
+			uint8_t mask = 0;
+			for(i = (offset/8); i <= ((offset+length-1)/8); i++) {
+				if(i == (offset/8)) {
+					tmp_value = value;
+					tmp_value = tmp_value & 
+						((1 << (8-(offset%8)))-1);
+
+					tmp_value = tmp_value << (offset%8);
+	
+					mask = ~(((1 << (8-(offset%8)))-1) << 
+							(offset%8));
+
+					buffer[i] = (buffer[i] & mask) | 
+						tmp_value;
+				}
+				else if (i == ((offset + length -1)/8)) {
+					
+					value = value >> (length - 
+						((offset + length) % 8));
+
+					value = value & ((1 << (length - 
+						((offset + length) % 8))) - 1);
+				
+					mask = (1 << (length - 
+						((offset + length) % 8))) - 1;
+
+					buffer[i] = (buffer[i] & mask) | value;
+				}
+				else {
+					buffer[i] = value & (0xFF << i);
+				}
+			}
+		}
+
+		// reset value
+		report_item->value = 0;
+		
+		item = item->next;
+	}
+	
+	return EOK;
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Translate given data for putting them into the outoput report
+ * @param item Report item structure
+ * @param value Value to translate
+ * @return ranslated value
+ */
+uint32_t usb_hid_translate_data_reverse(usb_hid_report_field_t *item, 
+	int value)
+{
+	int ret=0;
+	int resolution;
+
+	if(USB_HID_ITEM_FLAG_CONSTANT(item->item_flags)) {
+		ret = item->logical_minimum;
+	}
+
+	if((item->physical_minimum == 0) && (item->physical_maximum == 0)){
+		item->physical_minimum = item->logical_minimum;
+		item->physical_maximum = item->logical_maximum;			
+	}
+	
+	// variable item
+	if(item->physical_maximum == item->physical_minimum){
+	    resolution = 1;
+	}
+	else {
+	    resolution = (item->logical_maximum - item->logical_minimum) /
+		((item->physical_maximum - item->physical_minimum) *
+		(usb_pow(10,(item->unit_exponent))));
+	}
+
+	ret = ((value - item->physical_minimum) * resolution) + 
+		item->logical_minimum;
+
+	usb_log_debug("\tvalue(%x), resolution(%x), phymin(%x) logmin(%x), \
+		ret(%x)\n", value, resolution, item->physical_minimum, 
+		item->logical_minimum, ret);
+	
+	if((item->logical_minimum < 0) || (item->logical_maximum < 0)){
+		return USB_HID_INT32_TO_UINT32(ret, item->size);
+	}
+	return (int32_t)0 + ret;
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Clones given state table
+ *
+ * @param item State table to clone
+ * @return Pointer to the cloned item
+ */
+usb_hid_report_item_t *usb_hid_report_item_clone(
+	const usb_hid_report_item_t *item)
+{
+	usb_hid_report_item_t *new_report_item;
+	
+	if(!(new_report_item = malloc(sizeof(usb_hid_report_item_t)))) {
+		return NULL;
+	}					
+	memcpy(new_report_item,item, sizeof(usb_hid_report_item_t));
+	link_initialize(&(new_report_item->link));
+
+	return new_report_item;
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Function for sequence walking through the report. Returns next field in the
+ * report or the first one when no field is given.
+ *
+ * @param report Searched report structure
+ * @param field Current field. If NULL is given, the first one in the report
+ * is returned. Otherwise the next one i nthe list is returned.
+ * @param path Usage path specifying which fields wa are interested in. 
+ * @param flags Flags defining mode of usage paths comparison
+ * @param type Type of report we search.
+ * @retval NULL if no field is founded
+ * @retval Pointer to the founded report structure when founded
+ */
+usb_hid_report_field_t *usb_hid_report_get_sibling(usb_hid_report_t *report, 
+	usb_hid_report_field_t *field, usb_hid_report_path_t *path, int flags, 
+	usb_hid_report_type_t type)
+{
+	usb_hid_report_description_t *report_des = 
+		usb_hid_report_find_description(report, path->report_id, type);
+
+	link_t *field_it;
+	
+	if(report_des == NULL){
+		return NULL;
+	}
+
+	if(field == NULL){
+		field_it = report_des->report_items.next;
+	}
+	else {
+		field_it = field->link.next;
+	}
+
+	while(field_it != &report_des->report_items) {
+		field = list_get_instance(field_it, usb_hid_report_field_t, 
+			link);
+
+		if(USB_HID_ITEM_FLAG_CONSTANT(field->item_flags) == 0) {
+			usb_hid_report_path_append_item (
+				field->collection_path, field->usage_page, 
+				field->usage);
+
+			if(usb_hid_report_compare_usage_path(
+				field->collection_path, path, flags) == EOK){
+
+				usb_hid_report_remove_last_item(
+					field->collection_path);
+
+				return field;
+			}
+			usb_hid_report_remove_last_item (
+				field->collection_path);
+		}
+		field_it = field_it->next;
+	}
+
+	return NULL;
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Returns next report_id of report of specified type. If zero is given than
+ * first report_id of specified type is returned (0 is not legal value for
+ * repotr_id)
+ *
+ * @param report_id Current report_id, 0 if there is no current report_id
+ * @param type Type of searched report
+ * @param report Report structure inwhich we search
+ * @retval 0 if report structure is null or there is no specified report
+ * @retval report_id otherwise
+ */
+uint8_t usb_hid_get_next_report_id(usb_hid_report_t *report, 
+	uint8_t report_id, usb_hid_report_type_t type)
+{
+	if(report == NULL){
+		return 0;
+	}
+
+	usb_hid_report_description_t *report_des;
+	link_t *report_it;
+	
+	if(report_id > 0) {
+		report_des = usb_hid_report_find_description(report, report_id, 
+			type);
+		if(report_des == NULL) {
+			return 0;
+		}
+		else {
+			report_it = report_des->link.next;
+		}	
+	}
+	else {
+		report_it = report->reports.next;
+	}
+
+	while(report_it != &report->reports) {
+		report_des = list_get_instance(report_it, 
+			usb_hid_report_description_t, link);
+
+		if(report_des->type == type){
+			return report_des->report_id;
+		}
+
+		report_it = report_it->next;
+	}
+
+	return 0;
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Reset all local items in given state table
+ *
+ * @param report_item State table containing current state of report
+ * descriptor parsing
+ *
+ * @return void
+ */
+void usb_hid_report_reset_local_items(usb_hid_report_item_t *report_item)
+{
+	if(report_item == NULL)	{
+		return;
+	}
+	
+	report_item->usages_count = 0;
+	memset(report_item->usages, 0, USB_HID_MAX_USAGES);
+	
+	report_item->extended_usage_page = 0;
+	report_item->usage_minimum = 0;
+	report_item->usage_maximum = 0;
+	report_item->designator_index = 0;
+	report_item->designator_minimum = 0;
+	report_item->designator_maximum = 0;
+	report_item->string_index = 0;
+	report_item->string_minimum = 0;
+	report_item->string_maximum = 0;
+
+	return;
+}
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/src/hidpath.c
===================================================================
--- uspace/lib/usbhid/src/hidpath.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/src/hidpath.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,468 @@
+/*
+ * Copyright (c) 2011 Matej Klonfar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhid
+ * @{
+ */
+/** @file
+ * HID report descriptor and report data parser implementation.
+ */
+#include <usb/hid/hidparser.h>
+#include <errno.h>
+#include <stdio.h>
+#include <malloc.h>
+#include <mem.h>
+#include <usb/debug.h>
+#include <assert.h>
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Compares two usages if they are same or not or one of the usages is not
+ * set.
+ *
+ * @param usage1
+ * @param usage2
+ * @return boolean
+ */
+#define USB_HID_SAME_USAGE(usage1, usage2)		\
+	((usage1 == usage2) || (usage1 == 0) || (usage2 == 0))
+
+/**
+ * Compares two usage pages if they are same or not or one of them is not set.
+ *
+ * @param page1
+ * @param page2
+ * @return boolean
+ */
+#define USB_HID_SAME_USAGE_PAGE(page1, page2)	\
+	((page1 == page2) || (page1 == 0) || (page2 == 0))
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Appends one item (couple of usage_path and usage) into the usage path
+ * structure
+ *
+ * @param usage_path Usage path structure
+ * @param usage_page Usage page constant
+ * @param usage Usage constant
+ * @return Error code
+ */
+int usb_hid_report_path_append_item(usb_hid_report_path_t *usage_path, 
+                                    int32_t usage_page, int32_t usage)
+{	
+	usb_hid_report_usage_path_t *item;
+
+	if(!(item=malloc(sizeof(usb_hid_report_usage_path_t)))) {
+		return ENOMEM;
+	}
+	list_initialize(&item->link);
+
+	item->usage = usage;
+	item->usage_page = usage_page;
+	item->flags = 0;
+	
+	list_append (&item->link, &usage_path->head);
+	usage_path->depth++;
+	return EOK;
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Removes last item from the usage path structure
+ * @param usage_path 
+ * @return void
+ */
+void usb_hid_report_remove_last_item(usb_hid_report_path_t *usage_path)
+{
+	usb_hid_report_usage_path_t *item;
+	
+	if(!list_empty(&usage_path->head)){
+		item = list_get_instance(usage_path->head.prev, 
+		                         usb_hid_report_usage_path_t, link);		
+		list_remove(usage_path->head.prev);
+		usage_path->depth--;
+		free(item);
+	}
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Nulls last item of the usage path structure.
+ *
+ * @param usage_path
+ * @return void
+ */
+void usb_hid_report_null_last_item(usb_hid_report_path_t *usage_path)
+{
+	usb_hid_report_usage_path_t *item;
+	
+	if(!list_empty(&usage_path->head)){	
+		item = list_get_instance(usage_path->head.prev, 
+			usb_hid_report_usage_path_t, link);
+
+		memset(item, 0, sizeof(usb_hid_report_usage_path_t));
+	}
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Modifies last item of usage path structure by given usage page or usage
+ *
+ * @param usage_path Opaque usage path structure
+ * @param tag Class of currently processed tag (Usage page tag falls into Global
+ * class but Usage tag into the Local)
+ * @param data Value of the processed tag
+ * @return void
+ */
+void usb_hid_report_set_last_item(usb_hid_report_path_t *usage_path, 
+                                  int32_t tag, int32_t data)
+{
+	usb_hid_report_usage_path_t *item;
+	
+	if(!list_empty(&usage_path->head)){	
+		item = list_get_instance(usage_path->head.prev, 
+		                         usb_hid_report_usage_path_t, link);
+
+		switch(tag) {
+			case USB_HID_TAG_CLASS_GLOBAL:
+				item->usage_page = data;
+				break;
+			case USB_HID_TAG_CLASS_LOCAL:
+				item->usage = data;
+				break;
+		}
+	}
+	
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ *
+ *
+ *
+ *
+ */
+void usb_hid_print_usage_path(usb_hid_report_path_t *path)
+{
+	usb_log_debug("USAGE_PATH FOR RId(%d):\n", path->report_id);
+	usb_log_debug("\tLENGTH: %d\n", path->depth);
+
+	link_t *item = path->head.next;
+	usb_hid_report_usage_path_t *path_item;
+	while(item != &path->head) {
+
+		path_item = list_get_instance(item, usb_hid_report_usage_path_t, 
+			link);
+
+		usb_log_debug("\tUSAGE_PAGE: %X\n", path_item->usage_page);
+		usb_log_debug("\tUSAGE: %X\n", path_item->usage);
+		usb_log_debug("\tFLAGS: %d\n", path_item->flags);		
+		
+       	item = item->next;
+	}
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Compares two usage paths structures
+ *
+ *
+ * @param report_path usage path structure to compare with @path 
+ * @param path usage patrh structure to compare
+ * @param flags Flags determining the mode of comparison
+ * @return EOK if both paths are identical, non zero number otherwise
+ */
+int usb_hid_report_compare_usage_path(usb_hid_report_path_t *report_path, 
+                                      usb_hid_report_path_t *path,
+                                      int flags)
+{
+	usb_hid_report_usage_path_t *report_item;
+	usb_hid_report_usage_path_t *path_item;
+
+	link_t *report_link;
+	link_t *path_link;
+
+	int only_page;
+
+	if(report_path->report_id != path->report_id) {
+		if(path->report_id != 0) {
+			return 1;
+		}
+	}
+
+	// Empty path match all others
+	if(path->depth == 0){
+		return EOK;
+	}
+
+
+	if((only_page = flags & USB_HID_PATH_COMPARE_USAGE_PAGE_ONLY) != 0){
+		flags -= USB_HID_PATH_COMPARE_USAGE_PAGE_ONLY;
+	}
+	
+	switch(flags){
+	/* path is somewhere in report_path */
+	case USB_HID_PATH_COMPARE_ANYWHERE:
+		if(path->depth != 1){
+			return 1;
+		}
+
+		report_link = report_path->head.next;
+		path_link = path->head.next;
+		path_item = list_get_instance(path_link, 
+			usb_hid_report_usage_path_t, link);
+
+		while(report_link != &report_path->head) {
+			report_item = list_get_instance(report_link, 
+				usb_hid_report_usage_path_t, link);
+				
+			if(USB_HID_SAME_USAGE_PAGE(report_item->usage_page, 
+				path_item->usage_page)){
+					
+				if(only_page == 0){
+					if(USB_HID_SAME_USAGE(
+						report_item->usage,
+						path_item->usage)) {
+							
+						return EOK;
+					}
+				}
+				else {
+					return EOK;
+				}
+			}
+
+			report_link = report_link->next;
+		}
+
+		return 1;
+		break;
+
+	/* the paths must be identical */
+	case USB_HID_PATH_COMPARE_STRICT:
+		if(report_path->depth != path->depth){
+			return 1;
+		}
+		
+	/* path is prefix of the report_path */
+	case USB_HID_PATH_COMPARE_BEGIN:
+	
+		report_link = report_path->head.next;
+		path_link = path->head.next;
+			
+		while((report_link != &report_path->head) && 
+		      (path_link != &path->head)) {
+					  
+			report_item = list_get_instance(report_link, 
+				usb_hid_report_usage_path_t, link);
+					  
+			path_item = list_get_instance(path_link,
+       				usb_hid_report_usage_path_t, link);
+
+			if(!USB_HID_SAME_USAGE_PAGE(report_item->usage_page, 
+				path_item->usage_page) || ((only_page == 0) && 
+			    !USB_HID_SAME_USAGE(report_item->usage, 
+				path_item->usage))) {
+			
+				return 1;
+			} 
+			else {
+				report_link = report_link->next;
+				path_link = path_link->next;			
+			}
+			
+				}
+
+		if((((flags & USB_HID_PATH_COMPARE_BEGIN) != 0) && 
+			(path_link == &path->head)) || 
+		   ((report_link == &report_path->head) && 
+			(path_link == &path->head))) {
+				
+			return EOK;
+		}
+		else {
+			return 1;
+		}						
+		break;
+
+	/* path is suffix of report_path */
+	case USB_HID_PATH_COMPARE_END:
+
+		report_link = report_path->head.prev;
+		path_link = path->head.prev;
+
+		if(list_empty(&path->head)){
+			return EOK;
+		}
+			
+		while((report_link != &report_path->head) && 
+		      (path_link != &path->head)) {
+						  
+			report_item = list_get_instance(report_link, 
+				usb_hid_report_usage_path_t, link);
+
+			path_item = list_get_instance(path_link, 
+				usb_hid_report_usage_path_t, link);		
+						  
+			if(!USB_HID_SAME_USAGE_PAGE(report_item->usage_page, 
+				path_item->usage_page) || ((only_page == 0) && 
+			    !USB_HID_SAME_USAGE(report_item->usage, 
+				path_item->usage))) {
+						
+					return 1;
+			} else {
+				report_link = report_link->prev;
+				path_link = path_link->prev;			
+			}
+
+		}
+
+		if(path_link == &path->head) {
+			return EOK;
+		}
+		else {
+			return 1;
+		}						
+			
+		break;
+
+	default:
+		return EINVAL;
+	}
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Allocates and initializes new usage path structure.
+ *
+ * @return Initialized usage path structure
+ */
+usb_hid_report_path_t *usb_hid_report_path(void)
+{
+	usb_hid_report_path_t *path;
+	path = malloc(sizeof(usb_hid_report_path_t));
+	if(path == NULL){
+		return NULL;
+	}
+	else {
+		path->depth = 0;
+		path->report_id = 0;
+		list_initialize(&path->link);
+		list_initialize(&path->head);
+		return path;
+	}
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Releases given usage path structure.
+ *
+ * @param path usage path structure to release
+ * @return void
+ */
+void usb_hid_report_path_free(usb_hid_report_path_t *path)
+{
+	while(!list_empty(&path->head)){
+		usb_hid_report_remove_last_item(path);
+	}
+
+	list_remove(&path->link);
+	free(path);
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Clone content of given usage path to the new one
+ *
+ * @param usage_path Usage path structure to clone
+ * @return New copy of given usage path structure
+ */
+usb_hid_report_path_t *usb_hid_report_path_clone(
+	usb_hid_report_path_t *usage_path)
+{
+	link_t *path_link;
+	usb_hid_report_usage_path_t *path_item;
+	usb_hid_report_usage_path_t *new_path_item;
+	usb_hid_report_path_t *new_usage_path = usb_hid_report_path ();
+
+	if(new_usage_path == NULL){
+		return NULL;
+	}
+
+	new_usage_path->report_id = usage_path->report_id;
+	
+	if(list_empty(&usage_path->head)){
+		return new_usage_path;
+	}
+
+	path_link = usage_path->head.next;
+	while(path_link != &usage_path->head) {
+		path_item = list_get_instance(path_link, 
+			usb_hid_report_usage_path_t, link);
+
+		new_path_item = malloc(sizeof(usb_hid_report_usage_path_t));
+		if(new_path_item == NULL) {
+			return NULL;
+		}
+		
+		list_initialize (&new_path_item->link);		
+		new_path_item->usage_page = path_item->usage_page;
+		new_path_item->usage = path_item->usage;		
+		new_path_item->flags = path_item->flags;		
+		
+		list_append(&new_path_item->link, &new_usage_path->head);
+		new_usage_path->depth++;
+
+		path_link = path_link->next;
+	}
+
+	return new_usage_path;
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Sets report id in usage path structure
+ *
+ * @param path Usage path structure
+ * @param report_id Report id to set
+ * @return Error code
+ */
+int usb_hid_report_path_set_report_id(usb_hid_report_path_t *path, 
+	uint8_t report_id)
+{
+	if(path == NULL){
+		return EINVAL;
+	}
+
+	path->report_id = report_id;
+	return EOK;
+}
+
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/src/hidreport.c
===================================================================
--- uspace/lib/usbhid/src/hidreport.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/src/hidreport.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,207 @@
+/*
+ * Copyright (c) 2011 Lubos Slovak
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhid
+ * @{
+ */
+/**
+ * @file
+ * USB HID keyboard device structure and API.
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <str_error.h>
+
+#include <usb/debug.h>
+#include <usb/hid/hidparser.h>
+#include <usb/dev/dp.h>
+#include <usb/dev/driver.h>
+#include <usb/dev/pipes.h>
+#include <usb/hid/hid.h>
+#include <usb/descriptor.h>
+#include <usb/dev/request.h>
+
+#include <usb/hid/hidreport.h>
+
+static int usb_hid_get_report_descriptor(usb_device_t *dev, 
+    uint8_t **report_desc, size_t *size)
+{
+	assert(report_desc != NULL);
+	assert(size != NULL);
+	
+	usb_dp_parser_t parser =  {
+		.nesting = usb_dp_standard_descriptor_nesting
+	};
+	
+	usb_dp_parser_data_t parser_data = {
+		.data = dev->descriptors.configuration,
+		.size = dev->descriptors.configuration_size,
+		.arg = NULL
+	};
+	
+	/*
+	 * First nested descriptor of the configuration descriptor.
+	 */
+	uint8_t *d = 
+	    usb_dp_get_nested_descriptor(&parser, &parser_data, 
+	    dev->descriptors.configuration);
+	
+	/*
+	 * Find the interface descriptor corresponding to our interface number.
+	 */
+	int i = 0;
+	while (d != NULL && i < dev->interface_no) {
+		d = usb_dp_get_sibling_descriptor(&parser, &parser_data, 
+		    dev->descriptors.configuration, d);
+		++i;
+	}
+	
+	if (d == NULL) {
+		usb_log_error("The %d. interface descriptor not found!\n",
+		    dev->interface_no);
+		return ENOENT;
+	}
+	
+	/*
+	 * First nested descriptor of the interface descriptor.
+	 */
+	uint8_t *iface_desc = d;
+	d = usb_dp_get_nested_descriptor(&parser, &parser_data, iface_desc);
+	
+	/*
+	 * Search through siblings until the HID descriptor is found.
+	 */
+	while (d != NULL && *(d + 1) != USB_DESCTYPE_HID) {
+		d = usb_dp_get_sibling_descriptor(&parser, &parser_data, 
+		    iface_desc, d);
+	}
+	
+	if (d == NULL) {
+		usb_log_fatal("No HID descriptor found!\n");
+		return ENOENT;
+	}
+	
+	if (*d != sizeof(usb_standard_hid_descriptor_t)) {
+		usb_log_error("HID descriptor has wrong size (%u, expected %zu"
+		    ")\n", *d, sizeof(usb_standard_hid_descriptor_t));
+		return EINVAL;
+	}
+	
+	usb_standard_hid_descriptor_t *hid_desc = 
+	    (usb_standard_hid_descriptor_t *)d;
+	
+	uint16_t length =  hid_desc->report_desc_info.length;
+	size_t actual_size = 0;
+
+	/*
+	 * Allocate space for the report descriptor.
+	 */
+	*report_desc = (uint8_t *)malloc(length);
+	if (*report_desc == NULL) {
+		usb_log_error("Failed to allocate space for Report descriptor."
+		    "\n");
+		return ENOMEM;
+	}
+	
+	usb_log_debug("Getting Report descriptor, expected size: %u\n", length);
+	
+	/*
+	 * Get the descriptor from the device.
+	 */
+	int rc = usb_request_get_descriptor(&dev->ctrl_pipe,
+	    USB_REQUEST_TYPE_STANDARD, USB_REQUEST_RECIPIENT_INTERFACE,
+	    USB_DESCTYPE_HID_REPORT, 0, dev->interface_no,
+	    *report_desc, length, &actual_size);
+
+	if (rc != EOK) {
+		free(*report_desc);
+		*report_desc = NULL;
+		return rc;
+	}
+
+	if (actual_size != length) {
+		free(*report_desc);
+		*report_desc = NULL;
+		usb_log_error("Report descriptor has wrong size (%zu, expected "
+		    "%u)\n", actual_size, length);
+		return EINVAL;
+	}
+	
+	*size = length;
+	
+	usb_log_debug("Done.\n");
+	
+	return EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int usb_hid_process_report_descriptor(usb_device_t *dev, 
+    usb_hid_report_t *report, uint8_t **report_desc, size_t *report_size)
+{
+	if (dev == NULL || report == NULL) {
+		usb_log_error("Failed to process Report descriptor: wrong "
+		    "parameters given.\n");
+		return EINVAL;
+	}
+	
+//	uint8_t *report_desc = NULL;
+//	size_t report_size;
+	
+	int rc = usb_hid_get_report_descriptor(dev, report_desc, report_size);
+	
+	if (rc != EOK) {
+		usb_log_error("Problem with getting Report descriptor: %s.\n",
+		    str_error(rc));
+		if (*report_desc != NULL) {
+			free(*report_desc);
+			*report_desc = NULL;
+		}
+		return rc;
+	}
+	
+	assert(*report_desc != NULL);
+	
+	rc = usb_hid_parse_report_descriptor(report, *report_desc, *report_size);
+	if (rc != EOK) {
+		usb_log_error("Problem parsing Report descriptor: %s.\n",
+		    str_error(rc));
+		free(*report_desc);
+		*report_desc = NULL;
+		return rc;
+	}
+	
+	usb_hid_descriptor_print(report);
+	
+	return EOK;
+}
+
+/**
+ * @}
+ */
Index: uspace/lib/usbhid/src/hidreq.c
===================================================================
--- uspace/lib/usbhid/src/hidreq.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhid/src/hidreq.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,379 @@
+/*
+ * Copyright (c) 2011 Lubos Slovak
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup drvusbhid
+ * @{
+ */
+/** @file
+ * HID class-specific requests.
+ */
+
+#include <stdint.h>
+#include <errno.h>
+#include <str_error.h>
+
+#include <usb/hid/hid.h>
+#include <usb/debug.h>
+#include <usb/dev/request.h>
+#include <usb/dev/pipes.h>
+
+#include <usb/hid/request.h>
+
+/*----------------------------------------------------------------------------*/
+/**
+ * Send Set Report request to the HID device.
+ *
+ * @param hid_dev HID device to send the request to.
+ * @param type Type of the report.
+ * @param buffer Report data.
+ * @param buf_size Report data size (in bytes).
+ *
+ * @retval EOK if successful.
+ * @retval EINVAL if no HID device is given.
+ * @return Other value inherited from function usb_control_request_set().
+ */
+int usbhid_req_set_report(usb_pipe_t *ctrl_pipe, int iface_no,
+    usb_hid_report_type_t type, uint8_t *buffer, size_t buf_size)
+{
+	if (ctrl_pipe == NULL) {
+		usb_log_warning("usbhid_req_set_report(): no pipe given.\n");
+		return EINVAL;
+	}
+	
+	if (iface_no < 0) {
+		usb_log_warning("usbhid_req_set_report(): no interface given."
+		    "\n");
+		return EINVAL;
+	}
+	
+	/*
+	 * No need for checking other parameters, as they are checked in
+	 * the called function (usb_control_request_set()).
+	 */
+	
+	int rc;
+	
+	uint16_t value = 0;
+	value |= (type << 8);
+
+	usb_log_debug("Sending Set_Report request to the device.\n");
+	
+	rc = usb_control_request_set(ctrl_pipe, 
+	    USB_REQUEST_TYPE_CLASS, USB_REQUEST_RECIPIENT_INTERFACE, 
+	    USB_HIDREQ_SET_REPORT, value, iface_no, buffer, buf_size);
+
+	if (rc != EOK) {
+		usb_log_warning("Error sending output report to the keyboard: "
+		    "%s.\n", str_error(rc));
+		return rc;
+	}
+	
+	return EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/**
+ * Send Set Protocol request to the HID device.
+ *
+ * @param hid_dev HID device to send the request to.
+ * @param protocol Protocol to set.
+ *
+ * @retval EOK if successful.
+ * @retval EINVAL if no HID device is given.
+ * @return Other value inherited from function usb_control_request_set().
+ */
+int usbhid_req_set_protocol(usb_pipe_t *ctrl_pipe, int iface_no,
+    usb_hid_protocol_t protocol)
+{
+	if (ctrl_pipe == NULL) {
+		usb_log_warning("usbhid_req_set_report(): no pipe given.\n");
+		return EINVAL;
+	}
+	
+	if (iface_no < 0) {
+		usb_log_warning("usbhid_req_set_report(): no interface given."
+		    "\n");
+		return EINVAL;
+	}
+	
+	/*
+	 * No need for checking other parameters, as they are checked in
+	 * the called function (usb_control_request_set()).
+	 */
+	
+	int rc;
+
+	usb_log_debug("Sending Set_Protocol request to the device ("
+	    "protocol: %d, iface: %d).\n", protocol, iface_no);
+	
+	rc = usb_control_request_set(ctrl_pipe, 
+	    USB_REQUEST_TYPE_CLASS, USB_REQUEST_RECIPIENT_INTERFACE, 
+	    USB_HIDREQ_SET_PROTOCOL, protocol, iface_no, NULL, 0);
+
+	if (rc != EOK) {
+		usb_log_warning("Error sending output report to the keyboard: "
+		    "%s.\n", str_error(rc));
+		return rc;
+	}
+	
+	return EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/**
+ * Send Set Idle request to the HID device.
+ *
+ * @param hid_dev HID device to send the request to.
+ * @param duration Duration value (is multiplicated by 4 by the device to
+ *                 get real duration in miliseconds).
+ *
+ * @retval EOK if successful.
+ * @retval EINVAL if no HID device is given.
+ * @return Other value inherited from function usb_control_request_set().
+ */
+int usbhid_req_set_idle(usb_pipe_t *ctrl_pipe, int iface_no, uint8_t duration)
+{
+	if (ctrl_pipe == NULL) {
+		usb_log_warning("usbhid_req_set_report(): no pipe given.\n");
+		return EINVAL;
+	}
+	
+	if (iface_no < 0) {
+		usb_log_warning("usbhid_req_set_report(): no interface given."
+		    "\n");
+		return EINVAL;
+	}
+	
+	/*
+	 * No need for checking other parameters, as they are checked in
+	 * the called function (usb_control_request_set()).
+	 */
+	
+	int rc;
+
+	usb_log_debug("Sending Set_Idle request to the device ("
+	    "duration: %u, iface: %d).\n", duration, iface_no);
+	
+	uint16_t value = duration << 8;
+	
+	rc = usb_control_request_set(ctrl_pipe, 
+	    USB_REQUEST_TYPE_CLASS, USB_REQUEST_RECIPIENT_INTERFACE, 
+	    USB_HIDREQ_SET_IDLE, value, iface_no, NULL, 0);
+
+	if (rc != EOK) {
+		usb_log_warning("Error sending output report to the keyboard: "
+		    "%s.\n", str_error(rc));
+		return rc;
+	}
+	
+	return EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/**
+ * Send Get Report request to the HID device.
+ *
+ * @param[in] hid_dev HID device to send the request to.
+ * @param[in] type Type of the report.
+ * @param[in][out] buffer Buffer for the report data.
+ * @param[in] buf_size Size of the buffer (in bytes).
+ * @param[out] actual_size Actual size of report received from the device 
+ *                         (in bytes).
+ *
+ * @retval EOK if successful.
+ * @retval EINVAL if no HID device is given.
+ * @return Other value inherited from function usb_control_request_set().
+ */
+int usbhid_req_get_report(usb_pipe_t *ctrl_pipe, int iface_no, 
+    usb_hid_report_type_t type, uint8_t *buffer, size_t buf_size, 
+    size_t *actual_size)
+{
+	if (ctrl_pipe == NULL) {
+		usb_log_warning("usbhid_req_set_report(): no pipe given.\n");
+		return EINVAL;
+	}
+	
+	if (iface_no < 0) {
+		usb_log_warning("usbhid_req_set_report(): no interface given."
+		    "\n");
+		return EINVAL;
+	}
+	
+	/*
+	 * No need for checking other parameters, as they are checked in
+	 * the called function (usb_control_request_set()).
+	 */
+	
+	int rc;
+
+	uint16_t value = 0;
+	value |= (type << 8);
+	
+	usb_log_debug("Sending Get_Report request to the device.\n");
+	
+	rc = usb_control_request_get(ctrl_pipe, 
+	    USB_REQUEST_TYPE_CLASS, USB_REQUEST_RECIPIENT_INTERFACE, 
+	    USB_HIDREQ_GET_REPORT, value, iface_no, buffer, buf_size,
+	    actual_size);
+
+	if (rc != EOK) {
+		usb_log_warning("Error sending output report to the keyboard: "
+		    "%s.\n", str_error(rc));
+		return rc;
+	}
+	
+	return EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/**
+ * Send Get Protocol request to the HID device.
+ *
+ * @param[in] hid_dev HID device to send the request to.
+ * @param[out] protocol Current protocol of the device.
+ *
+ * @retval EOK if successful.
+ * @retval EINVAL if no HID device is given.
+ * @return Other value inherited from function usb_control_request_set().
+ */
+int usbhid_req_get_protocol(usb_pipe_t *ctrl_pipe, int iface_no, 
+    usb_hid_protocol_t *protocol)
+{
+	if (ctrl_pipe == NULL) {
+		usb_log_warning("usbhid_req_set_report(): no pipe given.\n");
+		return EINVAL;
+	}
+	
+	if (iface_no < 0) {
+		usb_log_warning("usbhid_req_set_report(): no interface given."
+		    "\n");
+		return EINVAL;
+	}
+	
+	/*
+	 * No need for checking other parameters, as they are checked in
+	 * the called function (usb_control_request_set()).
+	 */
+	
+	int rc;	
+
+	usb_log_debug("Sending Get_Protocol request to the device ("
+	    "iface: %d).\n", iface_no);
+	
+	uint8_t buffer[1];
+	size_t actual_size = 0;
+	
+	rc = usb_control_request_get(ctrl_pipe, 
+	    USB_REQUEST_TYPE_CLASS, USB_REQUEST_RECIPIENT_INTERFACE, 
+	    USB_HIDREQ_GET_PROTOCOL, 0, iface_no, buffer, 1, &actual_size);
+
+	if (rc != EOK) {
+		usb_log_warning("Error sending output report to the keyboard: "
+		    "%s.\n", str_error(rc));
+		return rc;
+	}
+	
+	if (actual_size != 1) {
+		usb_log_warning("Wrong data size: %zu, expected: 1.\n",
+			actual_size);
+		return ELIMIT;
+	}
+	
+	*protocol = buffer[0];
+	
+	return EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/**
+ * Send Get Idle request to the HID device.
+ *
+ * @param[in] hid_dev HID device to send the request to.
+ * @param[out] duration Duration value (multiplicate by 4 to get real duration
+ *                      in miliseconds).
+ *
+ * @retval EOK if successful.
+ * @retval EINVAL if no HID device is given.
+ * @return Other value inherited from one of functions 
+ *         usb_pipe_start_session(), usb_pipe_end_session(),
+ *         usb_control_request_set().
+ */
+int usbhid_req_get_idle(usb_pipe_t *ctrl_pipe, int iface_no, uint8_t *duration)
+{
+	if (ctrl_pipe == NULL) {
+		usb_log_warning("usbhid_req_set_report(): no pipe given.\n");
+		return EINVAL;
+	}
+	
+	if (iface_no < 0) {
+		usb_log_warning("usbhid_req_set_report(): no interface given."
+		    "\n");
+		return EINVAL;
+	}
+	
+	/*
+	 * No need for checking other parameters, as they are checked in
+	 * the called function (usb_control_request_set()).
+	 */
+	
+	int rc;
+
+	usb_log_debug("Sending Get_Idle request to the device ("
+	    "iface: %d).\n", iface_no);
+	
+	uint16_t value = 0;
+	uint8_t buffer[1];
+	size_t actual_size = 0;
+	
+	rc = usb_control_request_get(ctrl_pipe, 
+	    USB_REQUEST_TYPE_CLASS, USB_REQUEST_RECIPIENT_INTERFACE, 
+	    USB_HIDREQ_GET_IDLE, value, iface_no, buffer, 1, 
+	    &actual_size);
+
+	if (rc != EOK) {
+		usb_log_warning("Error sending output report to the keyboard: "
+		    "%s.\n", str_error(rc));
+		return rc;
+	}
+	
+	if (actual_size != 1) {
+		usb_log_warning("Wrong data size: %zu, expected: 1.\n",
+			actual_size);
+		return ELIMIT;
+	}
+	
+	*duration = buffer[0];
+	
+	return EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+/**
+ * @}
+ */
Index: uspace/lib/usbhost/Makefile
===================================================================
--- uspace/lib/usbhost/Makefile	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhost/Makefile	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,42 @@
+#
+# Copyright (c) 2011 Vojtech Horky
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# - Redistributions of source code must retain the above copyright
+#   notice, this list of conditions and the following disclaimer.
+# - Redistributions in binary form must reproduce the above copyright
+#   notice, this list of conditions and the following disclaimer in the
+#   documentation and/or other materials provided with the distribution.
+# - The name of the author may not be used to endorse or promote products
+#   derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+USPACE_PREFIX = ../..
+LIBRARY = libusbhost
+EXTRA_CFLAGS += \
+	-I$(LIBUSB_PREFIX)/include \
+	-I$(LIBDRV_PREFIX)/include \
+	-Iinclude
+
+SOURCES = \
+	src/batch.c \
+	src/device_keeper.c \
+	src/endpoint.c \
+	src/usb_endpoint_manager.c
+
+include $(USPACE_PREFIX)/Makefile.common
Index: uspace/lib/usbhost/include/usb/host/batch.h
===================================================================
--- uspace/lib/usbhost/include/usb/host/batch.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhost/include/usb/host/batch.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2011 Jan Vesely
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+/** @addtogroup libusbhost
+ * @{
+ */
+/** @file
+ * USB transfer transaction structures.
+ */
+#ifndef LIBUSBHOST_HOST_BATCH_H
+#define LIBUSBHOST_HOST_BATCH_H
+
+#include <adt/list.h>
+
+#include <usbhc_iface.h>
+#include <usb/usb.h>
+#include <usb/host/endpoint.h>
+
+typedef struct usb_transfer_batch usb_transfer_batch_t;
+struct usb_transfer_batch {
+	endpoint_t *ep;
+	link_t link;
+	usbhc_iface_transfer_in_callback_t callback_in;
+	usbhc_iface_transfer_out_callback_t callback_out;
+	void *arg;
+	char *buffer;
+	char *data_buffer;
+	size_t buffer_size;
+	char *setup_buffer;
+	size_t setup_size;
+	size_t transfered_size;
+	void (*next_step)(usb_transfer_batch_t *);
+	int error;
+	ddf_fun_t *fun;
+	void *private_data;
+	void (*private_data_dtor)(void *p_data);
+};
+
+void usb_transfer_batch_init(
+    usb_transfer_batch_t *instance,
+    endpoint_t *ep,
+    char *buffer,
+    char *data_buffer,
+    size_t buffer_size,
+    char *setup_buffer,
+    size_t setup_size,
+    usbhc_iface_transfer_in_callback_t func_in,
+    usbhc_iface_transfer_out_callback_t func_out,
+    void *arg,
+    ddf_fun_t *fun,
+    void *private_data,
+    void (*private_data_dtor)(void *p_data)
+);
+
+void usb_transfer_batch_call_in_and_dispose(usb_transfer_batch_t *instance);
+void usb_transfer_batch_call_out_and_dispose(usb_transfer_batch_t *instance);
+void usb_transfer_batch_finish(usb_transfer_batch_t *instance);
+void usb_transfer_batch_dispose(usb_transfer_batch_t *instance);
+
+static inline void usb_transfer_batch_finish_error(
+    usb_transfer_batch_t *instance, int error)
+{
+	assert(instance);
+	instance->error = error;
+	usb_transfer_batch_finish(instance);
+}
+
+static inline usb_transfer_batch_t *usb_transfer_batch_from_link(link_t *l)
+{
+	assert(l);
+	return list_get_instance(l, usb_transfer_batch_t, link);
+}
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbhost/include/usb/host/device_keeper.h
===================================================================
--- uspace/lib/usbhost/include/usb/host/device_keeper.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhost/include/usb/host/device_keeper.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2011 Jan Vesely
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhost
+ * @{
+ */
+/** @file
+ * Device keeper structure and functions.
+ *
+ * Typical USB host controller needs to keep track of various settings for
+ * each device that is connected to it.
+ * State of toggle bit, device speed etc. etc.
+ * This structure shall simplify the management.
+ */
+#ifndef LIBUSBHOST_HOST_DEVICE_KEEPER_H
+#define LIBUSBHOST_HOST_DEVICE_KEEPER_H
+
+#include <adt/list.h>
+#include <devman.h>
+#include <fibril_synch.h>
+#include <usb/usb.h>
+#include <usb/host/endpoint.h>
+
+/** Number of USB address for array dimensions. */
+#define USB_ADDRESS_COUNT (USB11_ADDRESS_MAX + 1)
+
+/** Information about attached USB device. */
+struct usb_device_info {
+	usb_speed_t speed;
+	bool occupied;
+	devman_handle_t handle;
+};
+
+/** Host controller device keeper.
+ * You shall not access members directly but only using functions below.
+ */
+typedef struct {
+	struct usb_device_info devices[USB_ADDRESS_COUNT];
+	fibril_mutex_t guard;
+	usb_address_t last_address;
+} usb_device_keeper_t;
+
+void usb_device_keeper_init(usb_device_keeper_t *instance);
+
+usb_address_t device_keeper_get_free_address(usb_device_keeper_t *instance,
+    usb_speed_t speed);
+
+void usb_device_keeper_bind(usb_device_keeper_t *instance,
+    usb_address_t address, devman_handle_t handle);
+
+void usb_device_keeper_release(usb_device_keeper_t *instance,
+    usb_address_t address);
+
+usb_address_t usb_device_keeper_find(usb_device_keeper_t *instance,
+    devman_handle_t handle);
+
+bool usb_device_keeper_find_by_address(usb_device_keeper_t *instance,
+    usb_address_t address, devman_handle_t *handle);
+
+usb_speed_t usb_device_keeper_get_speed(usb_device_keeper_t *instance,
+    usb_address_t address);
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbhost/include/usb/host/endpoint.h
===================================================================
--- uspace/lib/usbhost/include/usb/host/endpoint.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhost/include/usb/host/endpoint.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2011 Jan Vesely
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhost
+ * @{
+ */
+/** @file
+ *
+ */
+#ifndef LIBUSBHOST_HOST_ENDPOINT_H
+#define LIBUSBHOST_HOST_ENDPOINT_H
+
+#include <assert.h>
+#include <bool.h>
+#include <adt/list.h>
+#include <fibril_synch.h>
+
+#include <usb/usb.h>
+
+typedef struct endpoint {
+	usb_address_t address;
+	usb_endpoint_t endpoint;
+	usb_direction_t direction;
+	usb_transfer_type_t transfer_type;
+	usb_speed_t speed;
+	size_t max_packet_size;
+	unsigned toggle:1;
+	fibril_mutex_t guard;
+	fibril_condvar_t avail;
+	volatile bool active;
+	struct {
+		void *data;
+		int (*toggle_get)(void *);
+		void (*toggle_set)(void *, int);
+	} hc_data;
+} endpoint_t;
+
+int endpoint_init(endpoint_t *instance, usb_address_t address,
+    usb_endpoint_t endpoint, usb_direction_t direction,
+    usb_transfer_type_t type, usb_speed_t speed, size_t max_packet_size);
+
+void endpoint_destroy(endpoint_t *instance);
+
+void endpoint_set_hc_data(endpoint_t *instance,
+    void *data, int (*toggle_get)(void *), void (*toggle_set)(void *, int));
+
+void endpoint_clear_hc_data(endpoint_t *instance);
+
+void endpoint_use(endpoint_t *instance);
+
+void endpoint_release(endpoint_t *instance);
+
+int endpoint_toggle_get(endpoint_t *instance);
+
+void endpoint_toggle_set(endpoint_t *instance, int toggle);
+
+void endpoint_toggle_reset_filtered(endpoint_t *instance, usb_target_t target);
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbhost/include/usb/host/usb_endpoint_manager.h
===================================================================
--- uspace/lib/usbhost/include/usb/host/usb_endpoint_manager.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhost/include/usb/host/usb_endpoint_manager.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2011 Jan Vesely
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+/** @addtogroup libusbhost
+ * @{
+ */
+/** @file
+ * Device keeper structure and functions.
+ *
+ * Typical USB host controller needs to keep track of various settings for
+ * each device that is connected to it.
+ * State of toggle bit, device speed etc. etc.
+ * This structure shall simplify the management.
+ */
+#ifndef LIBUSBHOST_HOST_USB_ENDPOINT_MANAGER_H
+#define LIBUSBHOST_HOST_YSB_ENDPOINT_MANAGER_H
+
+#include <stdlib.h>
+#include <adt/hash_table.h>
+#include <fibril_synch.h>
+#include <usb/usb.h>
+#include <usb/host/endpoint.h>
+
+#define BANDWIDTH_TOTAL_USB11 12000000
+#define BANDWIDTH_AVAILABLE_USB11 ((BANDWIDTH_TOTAL_USB11 / 10) * 9)
+
+typedef struct usb_endpoint_manager {
+	hash_table_t ep_table;
+	fibril_mutex_t guard;
+	fibril_condvar_t change;
+	size_t free_bw;
+} usb_endpoint_manager_t;
+
+size_t bandwidth_count_usb11(usb_speed_t speed, usb_transfer_type_t type,
+    size_t size, size_t max_packet_size);
+
+int usb_endpoint_manager_init(usb_endpoint_manager_t *instance,
+    size_t available_bandwidth);
+
+void usb_endpoint_manager_destroy(usb_endpoint_manager_t *instance);
+
+int usb_endpoint_manager_register_ep(usb_endpoint_manager_t *instance,
+    endpoint_t *ep, size_t data_size);
+
+int usb_endpoint_manager_unregister_ep(usb_endpoint_manager_t *instance,
+    usb_address_t address, usb_endpoint_t ep, usb_direction_t direction);
+
+endpoint_t * usb_endpoint_manager_get_ep(usb_endpoint_manager_t *instance,
+    usb_address_t address, usb_endpoint_t ep, usb_direction_t direction,
+    size_t *bw);
+
+void usb_endpoint_manager_reset_if_need(
+    usb_endpoint_manager_t *instance, usb_target_t target, const uint8_t *data);
+
+static inline int usb_endpoint_manager_add_ep(usb_endpoint_manager_t *instance,
+    usb_address_t address, usb_endpoint_t endpoint, usb_direction_t direction,
+    usb_transfer_type_t type, usb_speed_t speed, size_t max_packet_size,
+    size_t data_size)
+{
+	endpoint_t *ep = malloc(sizeof(endpoint_t));
+	if (ep == NULL)
+		return ENOMEM;
+
+	int ret = endpoint_init(ep, address, endpoint, direction, type, speed,
+	    max_packet_size);
+	if (ret != EOK) {
+		free(ep);
+		return ret;
+	}
+
+	ret = usb_endpoint_manager_register_ep(instance, ep, data_size);
+	if (ret != EOK) {
+		endpoint_destroy(ep);
+		return ret;
+	}
+	return EOK;
+}
+#endif
+/**
+ * @}
+ */
+
Index: uspace/lib/usbhost/src/batch.c
===================================================================
--- uspace/lib/usbhost/src/batch.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhost/src/batch.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,176 @@
+/*
+ * Copyright (c) 2011 Jan Vesely
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+/** @addtogroup libusbhost
+ * @{
+ */
+/** @file
+ * USB transfer transaction structures (implementation).
+ */
+#include <errno.h>
+#include <str_error.h>
+
+#include <usb/usb.h>
+#include <usb/debug.h>
+#include <usb/host/batch.h>
+
+void usb_transfer_batch_call_in(usb_transfer_batch_t *instance);
+void usb_transfer_batch_call_out(usb_transfer_batch_t *instance);
+
+void usb_transfer_batch_init(
+    usb_transfer_batch_t *instance,
+    endpoint_t *ep,
+    char *buffer,
+    char *data_buffer,
+    size_t buffer_size,
+    char *setup_buffer,
+    size_t setup_size,
+    usbhc_iface_transfer_in_callback_t func_in,
+    usbhc_iface_transfer_out_callback_t func_out,
+    void *arg,
+    ddf_fun_t *fun,
+    void *private_data,
+    void (*private_data_dtor)(void *p_data)
+    )
+{
+	assert(instance);
+	link_initialize(&instance->link);
+	instance->ep = ep;
+	instance->callback_in = func_in;
+	instance->callback_out = func_out;
+	instance->arg = arg;
+	instance->buffer = buffer;
+	instance->data_buffer = data_buffer;
+	instance->buffer_size = buffer_size;
+	instance->setup_buffer = setup_buffer;
+	instance->setup_size = setup_size;
+	instance->fun = fun;
+	instance->private_data = private_data;
+	instance->private_data_dtor = private_data_dtor;
+	instance->transfered_size = 0;
+	instance->next_step = NULL;
+	instance->error = EOK;
+	endpoint_use(instance->ep);
+}
+/*----------------------------------------------------------------------------*/
+/** Helper function, calls callback and correctly destroys batch structure.
+ *
+ * @param[in] instance Batch structure to use.
+ */
+void usb_transfer_batch_call_in_and_dispose(usb_transfer_batch_t *instance)
+{
+	assert(instance);
+	usb_transfer_batch_call_in(instance);
+	usb_transfer_batch_dispose(instance);
+}
+/*----------------------------------------------------------------------------*/
+/** Helper function calls callback and correctly destroys batch structure.
+ *
+ * @param[in] instance Batch structure to use.
+ */
+void usb_transfer_batch_call_out_and_dispose(usb_transfer_batch_t *instance)
+{
+	assert(instance);
+	usb_transfer_batch_call_out(instance);
+	usb_transfer_batch_dispose(instance);
+}
+/*----------------------------------------------------------------------------*/
+/** Mark batch as finished and continue with next step.
+ *
+ * @param[in] instance Batch structure to use.
+ *
+ */
+void usb_transfer_batch_finish(usb_transfer_batch_t *instance)
+{
+	assert(instance);
+	assert(instance->ep);
+	endpoint_release(instance->ep);
+	instance->next_step(instance);
+}
+/*----------------------------------------------------------------------------*/
+/** Prepare data, get error status and call callback in.
+ *
+ * @param[in] instance Batch structure to use.
+ * Copies data from transport buffer, and calls callback with appropriate
+ * parameters.
+ */
+void usb_transfer_batch_call_in(usb_transfer_batch_t *instance)
+{
+	assert(instance);
+	assert(instance->callback_in);
+	assert(instance->ep);
+
+	/* We are data in, we need data */
+	memcpy(instance->buffer, instance->data_buffer, instance->buffer_size);
+
+	usb_log_debug("Batch(%p) done (T%d.%d, %s %s in, %zuB): %s (%d).\n",
+	    instance, instance->ep->address, instance->ep->endpoint,
+	    usb_str_speed(instance->ep->speed),
+	    usb_str_transfer_type_short(instance->ep->transfer_type),
+	    instance->transfered_size, str_error(instance->error),
+	    instance->error);
+
+	instance->callback_in(instance->fun, instance->error,
+	    instance->transfered_size, instance->arg);
+}
+/*----------------------------------------------------------------------------*/
+/** Get error status and call callback out.
+ *
+ * @param[in] instance Batch structure to use.
+ */
+void usb_transfer_batch_call_out(usb_transfer_batch_t *instance)
+{
+	assert(instance);
+	assert(instance->callback_out);
+
+	usb_log_debug("Batch(%p) done (T%d.%d, %s %s out): %s (%d).\n",
+	    instance, instance->ep->address, instance->ep->endpoint,
+	    usb_str_speed(instance->ep->speed),
+	    usb_str_transfer_type_short(instance->ep->transfer_type),
+	    str_error(instance->error), instance->error);
+
+	instance->callback_out(instance->fun,
+	    instance->error, instance->arg);
+}
+/*----------------------------------------------------------------------------*/
+/** Correctly dispose all used data structures.
+ *
+ * @param[in] instance Batch structure to use.
+ */
+void usb_transfer_batch_dispose(usb_transfer_batch_t *instance)
+{
+	assert(instance);
+	usb_log_debug("Batch(%p) disposing.\n", instance);
+	if (instance->private_data) {
+		assert(instance->private_data_dtor);
+		instance->private_data_dtor(instance->private_data);
+	}
+	free(instance);
+}
+/**
+ * @}
+ */
Index: uspace/lib/usbhost/src/device_keeper.c
===================================================================
--- uspace/lib/usbhost/src/device_keeper.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhost/src/device_keeper.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,208 @@
+/*
+ * Copyright (c) 2011 Jan Vesely
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbhost
+ * @{
+ */
+/** @file
+ * Device keeper structure and functions (implementation).
+ */
+#include <assert.h>
+#include <errno.h>
+#include <usb/debug.h>
+#include <usb/host/device_keeper.h>
+
+/*----------------------------------------------------------------------------*/
+/** Initialize device keeper structure.
+ *
+ * @param[in] instance Memory place to initialize.
+ *
+ * Set all values to false/0.
+ */
+void usb_device_keeper_init(usb_device_keeper_t *instance)
+{
+	assert(instance);
+	unsigned i = 0;
+	for (; i < USB_ADDRESS_COUNT; ++i) {
+		instance->devices[i].occupied = false;
+		instance->devices[i].handle = 0;
+		instance->devices[i].speed = USB_SPEED_MAX;
+	}
+	// TODO: is this hack enough?
+	// (it is needed to allow smooth registration at default address)
+	instance->devices[0].occupied = true;
+	instance->last_address = 0;
+	fibril_mutex_initialize(&instance->guard);
+}
+/*----------------------------------------------------------------------------*/
+/** Get a free USB address
+ *
+ * @param[in] instance Device keeper structure to use.
+ * @param[in] speed Speed of the device requiring address.
+ * @return Free address, or error code.
+ */
+usb_address_t device_keeper_get_free_address(
+    usb_device_keeper_t *instance, usb_speed_t speed)
+{
+	assert(instance);
+	fibril_mutex_lock(&instance->guard);
+
+	usb_address_t new_address = instance->last_address;
+	do {
+		++new_address;
+		if (new_address > USB11_ADDRESS_MAX)
+			new_address = 1;
+		if (new_address == instance->last_address) {
+			fibril_mutex_unlock(&instance->guard);
+			return ENOSPC;
+		}
+	} while (instance->devices[new_address].occupied);
+
+	assert(new_address != USB_ADDRESS_DEFAULT);
+	assert(instance->devices[new_address].occupied == false);
+
+	instance->devices[new_address].occupied = true;
+	instance->devices[new_address].speed = speed;
+	instance->last_address = new_address;
+
+	fibril_mutex_unlock(&instance->guard);
+	return new_address;
+}
+/*----------------------------------------------------------------------------*/
+/** Bind USB address to devman handle.
+ *
+ * @param[in] instance Device keeper structure to use.
+ * @param[in] address Device address
+ * @param[in] handle Devman handle of the device.
+ */
+void usb_device_keeper_bind(usb_device_keeper_t *instance,
+    usb_address_t address, devman_handle_t handle)
+{
+	assert(instance);
+	fibril_mutex_lock(&instance->guard);
+
+	assert(address > 0);
+	assert(address <= USB11_ADDRESS_MAX);
+	assert(instance->devices[address].occupied);
+
+	instance->devices[address].handle = handle;
+	fibril_mutex_unlock(&instance->guard);
+}
+/*----------------------------------------------------------------------------*/
+/** Release used USB address.
+ *
+ * @param[in] instance Device keeper structure to use.
+ * @param[in] address Device address
+ */
+void usb_device_keeper_release(
+    usb_device_keeper_t *instance, usb_address_t address)
+{
+	assert(instance);
+	assert(address > 0);
+	assert(address <= USB11_ADDRESS_MAX);
+
+	fibril_mutex_lock(&instance->guard);
+	assert(instance->devices[address].occupied);
+
+	instance->devices[address].occupied = false;
+	fibril_mutex_unlock(&instance->guard);
+}
+/*----------------------------------------------------------------------------*/
+/** Find USB address associated with the device
+ *
+ * @param[in] instance Device keeper structure to use.
+ * @param[in] handle Devman handle of the device seeking its address.
+ * @return USB Address, or error code.
+ */
+usb_address_t usb_device_keeper_find(
+    usb_device_keeper_t *instance, devman_handle_t handle)
+{
+	assert(instance);
+	fibril_mutex_lock(&instance->guard);
+	usb_address_t address = 1;
+	while (address <= USB11_ADDRESS_MAX) {
+		if (instance->devices[address].handle == handle) {
+			assert(instance->devices[address].occupied);
+			fibril_mutex_unlock(&instance->guard);
+			return address;
+		}
+		++address;
+	}
+	fibril_mutex_unlock(&instance->guard);
+	return ENOENT;
+}
+
+/** Find devman handle assigned to USB address.
+ * Intentionally refuse to find handle of default address.
+ *
+ * @param[in] instance Device keeper structure to use.
+ * @param[in] address Address the caller wants to find.
+ * @param[out] handle Where to store found handle.
+ * @return Whether such address is currently occupied.
+ */
+bool usb_device_keeper_find_by_address(usb_device_keeper_t *instance,
+    usb_address_t address, devman_handle_t *handle)
+{
+	assert(instance);
+	fibril_mutex_lock(&instance->guard);
+	if ((address <= 0) || (address >= USB_ADDRESS_COUNT)) {
+		fibril_mutex_unlock(&instance->guard);
+		return false;
+	}
+	if (!instance->devices[address].occupied) {
+		fibril_mutex_unlock(&instance->guard);
+		return false;
+	}
+
+	if (handle != NULL) {
+		*handle = instance->devices[address].handle;
+	}
+
+	fibril_mutex_unlock(&instance->guard);
+	return true;
+}
+
+/*----------------------------------------------------------------------------*/
+/** Get speed associated with the address
+ *
+ * @param[in] instance Device keeper structure to use.
+ * @param[in] address Address of the device.
+ * @return USB speed.
+ */
+usb_speed_t usb_device_keeper_get_speed(
+    usb_device_keeper_t *instance, usb_address_t address)
+{
+	assert(instance);
+	assert(address >= 0);
+	assert(address <= USB11_ADDRESS_MAX);
+
+	return instance->devices[address].speed;
+}
+/**
+ * @}
+ */
Index: uspace/lib/usbhost/src/endpoint.c
===================================================================
--- uspace/lib/usbhost/src/endpoint.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhost/src/endpoint.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2011 Jan Vesely
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup drvusbuhcihc
+ * @{
+ */
+/** @file
+ * @brief UHCI host controller driver structure
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <usb/host/endpoint.h>
+
+int endpoint_init(endpoint_t *instance, usb_address_t address,
+    usb_endpoint_t endpoint, usb_direction_t direction,
+    usb_transfer_type_t type, usb_speed_t speed, size_t max_packet_size)
+{
+	assert(instance);
+	instance->address = address;
+	instance->endpoint = endpoint;
+	instance->direction = direction;
+	instance->transfer_type = type;
+	instance->speed = speed;
+	instance->max_packet_size = max_packet_size;
+	instance->toggle = 0;
+	instance->active = false;
+	fibril_mutex_initialize(&instance->guard);
+	fibril_condvar_initialize(&instance->avail);
+	endpoint_clear_hc_data(instance);
+	return EOK;
+}
+/*----------------------------------------------------------------------------*/
+void endpoint_destroy(endpoint_t *instance)
+{
+	assert(instance);
+	assert(!instance->active);
+	free(instance);
+}
+/*----------------------------------------------------------------------------*/
+void endpoint_set_hc_data(endpoint_t *instance,
+    void *data, int (*toggle_get)(void *), void (*toggle_set)(void *, int))
+{
+	assert(instance);
+	instance->hc_data.data = data;
+	instance->hc_data.toggle_get = toggle_get;
+	instance->hc_data.toggle_set = toggle_set;
+}
+/*----------------------------------------------------------------------------*/
+void endpoint_clear_hc_data(endpoint_t *instance)
+{
+	assert(instance);
+	instance->hc_data.data = NULL;
+	instance->hc_data.toggle_get = NULL;
+	instance->hc_data.toggle_set = NULL;
+}
+/*----------------------------------------------------------------------------*/
+void endpoint_use(endpoint_t *instance)
+{
+	assert(instance);
+	fibril_mutex_lock(&instance->guard);
+	while (instance->active)
+		fibril_condvar_wait(&instance->avail, &instance->guard);
+	instance->active = true;
+	fibril_mutex_unlock(&instance->guard);
+}
+/*----------------------------------------------------------------------------*/
+void endpoint_release(endpoint_t *instance)
+{
+	assert(instance);
+	fibril_mutex_lock(&instance->guard);
+	instance->active = false;
+	fibril_mutex_unlock(&instance->guard);
+	fibril_condvar_signal(&instance->avail);
+}
+/*----------------------------------------------------------------------------*/
+int endpoint_toggle_get(endpoint_t *instance)
+{
+	assert(instance);
+	if (instance->hc_data.toggle_get)
+		instance->toggle =
+		    instance->hc_data.toggle_get(instance->hc_data.data);
+	return (int)instance->toggle;
+}
+/*----------------------------------------------------------------------------*/
+void endpoint_toggle_set(endpoint_t *instance, int toggle)
+{
+	assert(instance);
+	assert(toggle == 0 || toggle == 1);
+	if (instance->hc_data.toggle_set)
+		instance->hc_data.toggle_set(instance->hc_data.data, toggle);
+	instance->toggle = toggle;
+}
+/*----------------------------------------------------------------------------*/
+void endpoint_toggle_reset_filtered(endpoint_t *instance, usb_target_t target)
+{
+	assert(instance);
+	if (instance->address == target.address &&
+	    (instance->endpoint == target.endpoint || target.endpoint == 0))
+		endpoint_toggle_set(instance, 0);
+}
+/**
+ * @}
+ */
Index: uspace/lib/usbhost/src/usb_endpoint_manager.c
===================================================================
--- uspace/lib/usbhost/src/usb_endpoint_manager.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbhost/src/usb_endpoint_manager.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,291 @@
+/*
+ * Copyright (c) 2011 Jan Vesely
+ * All rights eps.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <bool.h>
+#include <assert.h>
+#include <errno.h>
+
+#include <usb/debug.h>
+#include <usb/host/usb_endpoint_manager.h>
+
+#define BUCKET_COUNT 7
+
+#define MAX_KEYS (3)
+typedef struct {
+	link_t link;
+	size_t bw;
+	endpoint_t *ep;
+} node_t;
+/*----------------------------------------------------------------------------*/
+static hash_index_t node_hash(unsigned long key[])
+{
+	hash_index_t hash = 0;
+	unsigned i = 0;
+	for (;i < MAX_KEYS; ++i) {
+		hash ^= key[i];
+	}
+	hash %= BUCKET_COUNT;
+	return hash;
+}
+/*----------------------------------------------------------------------------*/
+static int node_compare(unsigned long key[], hash_count_t keys, link_t *item)
+{
+	assert(item);
+	node_t *node = hash_table_get_instance(item, node_t, link);
+	assert(node);
+	assert(node->ep);
+	bool match = true;
+	switch (keys) {
+	case 3:
+		match = match && (key[2] == node->ep->direction);
+	case 2:
+		match = match && (key[1] == (unsigned long)node->ep->endpoint);
+	case 1:
+		match = match && (key[0] == (unsigned long)node->ep->address);
+		break;
+	default:
+		match = false;
+	}
+	return match;
+}
+/*----------------------------------------------------------------------------*/
+static void node_remove(link_t *item)
+{
+	assert(item);
+	node_t *node = hash_table_get_instance(item, node_t, link);
+	endpoint_destroy(node->ep);
+	free(node);
+}
+/*----------------------------------------------------------------------------*/
+static void node_toggle_reset_filtered(link_t *item, void *arg)
+{
+	assert(item);
+	node_t *node = hash_table_get_instance(item, node_t, link);
+	usb_target_t *target = arg;
+	endpoint_toggle_reset_filtered(node->ep, *target);
+}
+/*----------------------------------------------------------------------------*/
+static hash_table_operations_t op = {
+	.hash = node_hash,
+	.compare = node_compare,
+	.remove_callback = node_remove,
+};
+/*----------------------------------------------------------------------------*/
+size_t bandwidth_count_usb11(usb_speed_t speed, usb_transfer_type_t type,
+    size_t size, size_t max_packet_size)
+{
+	/* We care about bandwidth only for interrupt and isochronous. */
+	if ((type != USB_TRANSFER_INTERRUPT)
+	    && (type != USB_TRANSFER_ISOCHRONOUS)) {
+		return 0;
+	}
+
+	const unsigned packet_count =
+	    (size + max_packet_size - 1) / max_packet_size;
+	/* TODO: It may be that ISO and INT transfers use only one data packet
+	 * per transaction, but I did not find text in UB spec that confirms
+	 * this */
+	/* NOTE: All data packets will be considered to be max_packet_size */
+	switch (speed)
+	{
+	case USB_SPEED_LOW:
+		assert(type == USB_TRANSFER_INTERRUPT);
+		/* Protocol overhead 13B
+		 * (3 SYNC bytes, 3 PID bytes, 2 Endpoint + CRC bytes, 2
+		 * CRC bytes, and a 3-byte interpacket delay)
+		 * see USB spec page 45-46. */
+		/* Speed penalty 8: low speed is 8-times slower*/
+		return packet_count * (13 + max_packet_size) * 8;
+	case USB_SPEED_FULL:
+		/* Interrupt transfer overhead see above
+		 * or page 45 of USB spec */
+		if (type == USB_TRANSFER_INTERRUPT)
+			return packet_count * (13 + max_packet_size);
+
+		assert(type == USB_TRANSFER_ISOCHRONOUS);
+		/* Protocol overhead 9B
+		 * (2 SYNC bytes, 2 PID bytes, 2 Endpoint + CRC bytes, 2 CRC
+		 * bytes, and a 1-byte interpacket delay)
+		 * see USB spec page 42 */
+		return packet_count * (9 + max_packet_size);
+	default:
+		return 0;
+	}
+}
+/*----------------------------------------------------------------------------*/
+int usb_endpoint_manager_init(usb_endpoint_manager_t *instance,
+    size_t available_bandwidth)
+{
+	assert(instance);
+	fibril_mutex_initialize(&instance->guard);
+	fibril_condvar_initialize(&instance->change);
+	instance->free_bw = available_bandwidth;
+	bool ht =
+	    hash_table_create(&instance->ep_table, BUCKET_COUNT, MAX_KEYS, &op);
+	return ht ? EOK : ENOMEM;
+}
+/*----------------------------------------------------------------------------*/
+void usb_endpoint_manager_destroy(usb_endpoint_manager_t *instance)
+{
+	hash_table_destroy(&instance->ep_table);
+}
+/*----------------------------------------------------------------------------*/
+int usb_endpoint_manager_register_ep(usb_endpoint_manager_t *instance,
+    endpoint_t *ep, size_t data_size)
+{
+	assert(ep);
+	size_t bw = bandwidth_count_usb11(ep->speed, ep->transfer_type,
+	    data_size, ep->max_packet_size);
+	assert(instance);
+
+	unsigned long key[MAX_KEYS] =
+	    {ep->address, ep->endpoint, ep->direction};
+	fibril_mutex_lock(&instance->guard);
+
+	link_t *item =
+	    hash_table_find(&instance->ep_table, key);
+	if (item != NULL) {
+		fibril_mutex_unlock(&instance->guard);
+		return EEXISTS;
+	}
+
+	if (bw > instance->free_bw) {
+		fibril_mutex_unlock(&instance->guard);
+		return ENOSPC;
+	}
+
+	node_t *node = malloc(sizeof(node_t));
+	if (node == NULL) {
+		fibril_mutex_unlock(&instance->guard);
+		return ENOMEM;
+	}
+
+	node->bw = bw;
+	node->ep = ep;
+	link_initialize(&node->link);
+
+	hash_table_insert(&instance->ep_table, key, &node->link);
+	instance->free_bw -= bw;
+	fibril_mutex_unlock(&instance->guard);
+	fibril_condvar_broadcast(&instance->change);
+	return EOK;
+}
+/*----------------------------------------------------------------------------*/
+int usb_endpoint_manager_unregister_ep(usb_endpoint_manager_t *instance,
+    usb_address_t address, usb_endpoint_t endpoint, usb_direction_t direction)
+{
+	assert(instance);
+	unsigned long key[MAX_KEYS] = {address, endpoint, direction};
+
+	fibril_mutex_lock(&instance->guard);
+	link_t *item = hash_table_find(&instance->ep_table, key);
+	if (item == NULL) {
+		fibril_mutex_unlock(&instance->guard);
+		return EINVAL;
+	}
+
+	node_t *node = hash_table_get_instance(item, node_t, link);
+	if (node->ep->active)
+		return EBUSY;
+
+	instance->free_bw += node->bw;
+	hash_table_remove(&instance->ep_table, key, MAX_KEYS);
+
+	fibril_mutex_unlock(&instance->guard);
+	fibril_condvar_broadcast(&instance->change);
+	return EOK;
+}
+/*----------------------------------------------------------------------------*/
+endpoint_t * usb_endpoint_manager_get_ep(usb_endpoint_manager_t *instance,
+    usb_address_t address, usb_endpoint_t endpoint, usb_direction_t direction,
+    size_t *bw)
+{
+	assert(instance);
+	unsigned long key[MAX_KEYS] = {address, endpoint, direction};
+
+	fibril_mutex_lock(&instance->guard);
+	link_t *item = hash_table_find(&instance->ep_table, key);
+	if (item == NULL) {
+		fibril_mutex_unlock(&instance->guard);
+		return NULL;
+	}
+	node_t *node = hash_table_get_instance(item, node_t, link);
+	if (bw)
+		*bw = node->bw;
+
+	fibril_mutex_unlock(&instance->guard);
+	return node->ep;
+}
+/*----------------------------------------------------------------------------*/
+/** Check setup packet data for signs of toggle reset.
+ *
+ * @param[in] instance Device keeper structure to use.
+ * @param[in] target Device to receive setup packet.
+ * @param[in] data Setup packet data.
+ *
+ * Really ugly one.
+ */
+void usb_endpoint_manager_reset_if_need(
+    usb_endpoint_manager_t *instance, usb_target_t target, const uint8_t *data)
+{
+	assert(instance);
+	if (target.endpoint > 15 || target.endpoint < 0
+	    || target.address >= USB11_ADDRESS_MAX || target.address < 0) {
+		usb_log_error("Invalid data when checking for toggle reset.\n");
+		return;
+	}
+
+	switch (data[1])
+	{
+	case 0x01: /*clear feature*/
+		/* recipient is endpoint, value is zero (ENDPOINT_STALL) */
+		if (((data[0] & 0xf) == 1) && ((data[2] | data[3]) == 0)) {
+			/* endpoint number is < 16, thus first byte is enough */
+			usb_target_t reset_target =
+			    { .address = target.address, data[4] };
+			fibril_mutex_lock(&instance->guard);
+			hash_table_apply(&instance->ep_table,
+			    node_toggle_reset_filtered, &reset_target);
+			fibril_mutex_unlock(&instance->guard);
+		}
+	break;
+
+	case 0x9: /* set configuration */
+	case 0x11: /* set interface */
+		/* target must be device */
+		if ((data[0] & 0xf) == 0) {
+			usb_target_t reset_target =
+			    { .address = target.address, 0 };
+			fibril_mutex_lock(&instance->guard);
+			hash_table_apply(&instance->ep_table,
+			    node_toggle_reset_filtered, &reset_target);
+			fibril_mutex_unlock(&instance->guard);
+		}
+	break;
+	}
+}
Index: uspace/lib/usbvirt/Makefile
===================================================================
--- uspace/lib/usbvirt/Makefile	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbvirt/Makefile	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,46 @@
+#
+# Copyright (c) 2011 Vojtech Horky
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# - Redistributions of source code must retain the above copyright
+#   notice, this list of conditions and the following disclaimer.
+# - Redistributions in binary form must reproduce the above copyright
+#   notice, this list of conditions and the following disclaimer in the
+#   documentation and/or other materials provided with the distribution.
+# - The name of the author may not be used to endorse or promote products
+#   derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+USPACE_PREFIX = ../..
+LIBRARY = libusbvirt
+
+EXTRA_CFLAGS = \
+	-I$(LIBDRV_PREFIX)/include \
+	-I$(LIBUSB_PREFIX)/include \
+	-I$(LIBUSBDEV_PREFIX)/include \
+	-Iinclude
+
+SOURCES = \
+	src/ctrltransfer.c \
+	src/device.c \
+	src/ipc_dev.c \
+	src/ipc_hc.c \
+	src/stdreq.c \
+	src/transfer.c
+
+include $(USPACE_PREFIX)/Makefile.common
Index: uspace/lib/usbvirt/include/usbvirt/device.h
===================================================================
--- uspace/lib/usbvirt/include/usbvirt/device.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbvirt/include/usbvirt/device.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,221 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbvirt
+ * @{
+ */
+/** @file
+ * Virtual USB device.
+ */
+
+#ifndef LIBUSBVIRT_DEVICE_H_
+#define LIBUSBVIRT_DEVICE_H_
+
+#include <usb/usb.h>
+#include <usb/dev/request.h>
+#include <async.h>
+
+/** Maximum number of endpoints supported by virtual USB. */
+#define USBVIRT_ENDPOINT_MAX 16
+
+typedef struct usbvirt_device usbvirt_device_t;
+
+/** Callback for data to device (OUT transaction).
+ *
+ * @param dev Virtual device to which the transaction belongs.
+ * @param endpoint Target endpoint number.
+ * @param transfer_type Transfer type.
+ * @param buffer Data buffer.
+ * @param buffer_size Size of the buffer in bytes.
+ * @return Error code.
+ */
+typedef int (*usbvirt_on_data_to_device_t)(usbvirt_device_t *dev,
+    usb_endpoint_t endpoint, usb_transfer_type_t transfer_type,
+    void *buffer, size_t buffer_size);
+
+/** Callback for data from device (IN transaction).
+ *
+ * @param dev Virtual device to which the transaction belongs.
+ * @param endpoint Target endpoint number.
+ * @param transfer_type Transfer type.
+ * @param buffer Data buffer to write answer to.
+ * @param buffer_size Size of the buffer in bytes.
+ * @param act_buffer_size Write here how many bytes were actually written.
+ * @return Error code.
+ */
+typedef int (*usbvirt_on_data_from_device_t)(usbvirt_device_t *dev,
+    usb_endpoint_t endpoint, usb_transfer_type_t transfer_type,
+    void *buffer, size_t buffer_size, size_t *act_buffer_size);
+
+/** Callback for control transfer on endpoint zero.
+ *
+ * Notice that size of the data buffer is expected to be read from the
+ * setup packet.
+ *
+ * @param dev Virtual device to which the transaction belongs.
+ * @param setup_packet Standard setup packet.
+ * @param data Data (might be NULL).
+ * @param act_data_size Size of returned data in bytes.
+ * @return Error code.
+ */
+typedef int (*usbvirt_on_control_t)(usbvirt_device_t *dev,
+    const usb_device_request_setup_packet_t *setup_packet,
+    uint8_t *data, size_t *act_data_size);
+
+/** Callback for control request on a virtual USB device.
+ *
+ * See usbvirt_control_reply_helper() for simple way of answering
+ * control read requests.
+ */
+typedef struct {
+	/** Request direction (in or out). */
+	usb_direction_t req_direction;
+	/** Request recipient (device, interface or endpoint). */
+	usb_request_recipient_t req_recipient;
+	/** Request type (standard, class or vendor). */
+	usb_request_type_t req_type;
+	/** Actual request code. */
+	uint8_t request;
+	/** Request handler name for debugging purposes. */
+	const char *name;
+	/** Callback to be executed on matching request. */
+	usbvirt_on_control_t callback;
+} usbvirt_control_request_handler_t;
+
+/** Extra configuration data for GET_CONFIGURATION request. */
+typedef struct {
+	/** Actual data. */
+	uint8_t *data;
+	/** Data length. */
+	size_t length;
+} usbvirt_device_configuration_extras_t;
+
+/** Single device configuration. */
+typedef struct {
+	/** Standard configuration descriptor. */
+	usb_standard_configuration_descriptor_t *descriptor;
+	/** Array of extra data. */
+	usbvirt_device_configuration_extras_t *extra;
+	/** Length of @c extra array. */
+	size_t extra_count;
+} usbvirt_device_configuration_t;
+
+/** Standard USB descriptors for virtual device. */
+typedef struct {
+	/** Standard device descriptor.
+	 * There is always only one such descriptor for the device.
+	 */
+	usb_standard_device_descriptor_t *device;
+
+	/** Configurations. */
+	usbvirt_device_configuration_t *configuration;
+	/** Number of configurations. */
+	size_t configuration_count;
+} usbvirt_descriptors_t;
+
+/** Possible states of virtual USB device.
+ * Notice that these are not 1:1 mappings to those in USB specification.
+ */
+typedef enum {
+	/** Default state, device listens at default address. */
+	USBVIRT_STATE_DEFAULT,
+	/** Device has non-default address assigned. */
+	USBVIRT_STATE_ADDRESS,
+	/** Device is configured. */
+	USBVIRT_STATE_CONFIGURED
+} usbvirt_device_state_t;
+
+/** Ops structure for virtual USB device. */
+typedef struct {
+	/** Callbacks for data to device.
+	 * Index zero is ignored.
+	 */
+	usbvirt_on_data_to_device_t data_out[USBVIRT_ENDPOINT_MAX];
+	/** Callbacks for data from device.
+	 * Index zero is ignored.
+	 */
+	usbvirt_on_data_from_device_t data_in[USBVIRT_ENDPOINT_MAX];
+	/** Array of control handlers.
+	 * Last handler is expected to have the @c callback field set to NULL
+	 */
+	usbvirt_control_request_handler_t *control;
+	/** Callback when device changes state.
+	 *
+	 * The value of @c state attribute of @p dev device is not
+	 * defined during call of this function.
+	 *
+	 * @param dev The virtual USB device.
+	 * @param old_state Old device state.
+	 * @param new_state New device state.
+	 */
+	void (*state_changed)(usbvirt_device_t *dev,
+	    usbvirt_device_state_t old_state, usbvirt_device_state_t new_state);
+} usbvirt_device_ops_t;
+
+/** Virtual USB device. */
+struct usbvirt_device {
+	/** Name for debugging purposes. */
+	const char *name;
+	/** Custom device data. */
+	void *device_data;
+	/** Device ops. */
+	usbvirt_device_ops_t *ops;
+	/** Device descriptors. */
+	usbvirt_descriptors_t *descriptors;
+	/** Current device address.
+	 * You shall treat this field as read only in your code.
+	 */
+	usb_address_t address;
+	/** Current device state.
+	 * You shall treat this field as read only in your code.
+	 */
+	usbvirt_device_state_t state;
+	/** Session to the host controller.
+	 * You shall treat this field as read only in your code.
+	 */
+	async_sess_t *vhc_sess;
+};
+
+int usbvirt_device_plug(usbvirt_device_t *, const char *);
+void usbvirt_device_unplug(usbvirt_device_t *);
+
+void usbvirt_control_reply_helper(const usb_device_request_setup_packet_t *,
+    uint8_t *, size_t *, void *, size_t);
+
+int usbvirt_control_write(usbvirt_device_t *, void *, size_t, void *, size_t);
+int usbvirt_control_read(usbvirt_device_t *, void *, size_t, void *, size_t, size_t *);
+int usbvirt_data_out(usbvirt_device_t *, usb_transfer_type_t, usb_endpoint_t,
+    void *, size_t);
+int usbvirt_data_in(usbvirt_device_t *, usb_transfer_type_t, usb_endpoint_t,
+    void *, size_t, size_t *);
+
+#endif
+
+/**
+ * @}
+ */
Index: uspace/lib/usbvirt/include/usbvirt/ipc.h
===================================================================
--- uspace/lib/usbvirt/include/usbvirt/ipc.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbvirt/include/usbvirt/ipc.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbvirt
+ * @{
+ */
+/** @file
+ * IPC wrappers for virtual USB.
+ */
+
+#ifndef LIBUSBVIRT_IPC_H_
+#define LIBUSBVIRT_IPC_H_
+
+#include <ipc/common.h>
+#include <usb/usb.h>
+#include <bool.h>
+#include <usbvirt/device.h>
+#include <async.h>
+
+/** IPC methods communication between host controller and virtual device. */
+typedef enum {
+	IPC_M_USBVIRT_GET_NAME = IPC_FIRST_USER_METHOD + 80,
+	IPC_M_USBVIRT_CONTROL_READ,
+	IPC_M_USBVIRT_CONTROL_WRITE,
+	IPC_M_USBVIRT_INTERRUPT_IN,
+	IPC_M_USBVIRT_INTERRUPT_OUT,
+	IPC_M_USBVIRT_BULK_IN,
+	IPC_M_USBVIRT_BULK_OUT
+} usbvirt_hc_to_device_method_t;
+
+extern int usbvirt_ipc_send_control_read(async_sess_t *, void *, size_t,
+    void *, size_t, size_t *);
+extern int usbvirt_ipc_send_control_write(async_sess_t *, void *, size_t,
+    void *, size_t);
+extern int usbvirt_ipc_send_data_in(async_sess_t *, usb_endpoint_t,
+    usb_transfer_type_t, void *, size_t, size_t *);
+extern int usbvirt_ipc_send_data_out(async_sess_t *, usb_endpoint_t,
+    usb_transfer_type_t, void *, size_t);
+
+extern bool usbvirt_is_usbvirt_method(sysarg_t);
+extern bool usbvirt_ipc_handle_call(usbvirt_device_t *, ipc_callid_t,
+    ipc_call_t *);
+
+#endif
+
+/**
+ * @}
+ */
Index: uspace/lib/usbvirt/src/ctrltransfer.c
===================================================================
--- uspace/lib/usbvirt/src/ctrltransfer.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbvirt/src/ctrltransfer.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbvirt
+ * @{
+ */
+/** @file
+ * Control transfer handling.
+ */
+#include "private.h"
+#include <usb/dev/request.h>
+#include <usb/debug.h>
+#include <assert.h>
+#include <errno.h>
+
+/** Find and execute control transfer handler for virtual USB device.
+ *
+ * @param dev Target virtual device.
+ * @param control_handlers Array of control request handlers.
+ * @param setup Setup packet.
+ * @param data Extra data.
+ * @param data_sent_size Size of extra data in bytes.
+ * @return Error code.
+ * @retval EFORWARD No suitable handler found.
+ */
+int process_control_transfer(usbvirt_device_t *dev,
+    usbvirt_control_request_handler_t *control_handlers,
+    usb_device_request_setup_packet_t *setup,
+    uint8_t *data, size_t *data_sent_size)
+{
+	assert(dev);
+	assert(setup);
+
+	if (control_handlers == NULL) {
+		return EFORWARD;
+	}
+
+	usb_direction_t direction = setup->request_type & 128 ?
+	    USB_DIRECTION_IN : USB_DIRECTION_OUT;
+	usb_request_recipient_t req_recipient = setup->request_type & 31;
+	usb_request_type_t req_type = (setup->request_type >> 5) & 3;
+
+	usbvirt_control_request_handler_t *handler = control_handlers;
+	while (handler->callback != NULL) {
+		if (handler->req_direction != direction) {
+			goto next;
+		}
+		if (handler->req_recipient != req_recipient) {
+			goto next;
+		}
+		if (handler->req_type != req_type) {
+			goto next;
+		}
+		if (handler->request != setup->request) {
+			goto next;
+		}
+
+		usb_log_debug("Control transfer: %s(%s)\n", handler->name,
+		    usb_debug_str_buffer((uint8_t*) setup, sizeof(*setup), 0));
+		int rc = handler->callback(dev, setup, data, data_sent_size);
+		if (rc == EFORWARD) {
+			goto next;
+		}
+
+		return rc;
+
+next:
+		handler++;
+	}
+
+	return EFORWARD;
+}
+
+
+/**
+ * @}
+ */
Index: uspace/lib/usbvirt/src/device.c
===================================================================
--- uspace/lib/usbvirt/src/device.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbvirt/src/device.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbvirt
+ * @{
+ */
+/** @file
+ * Virtual USB device main routines.
+ */
+#include <errno.h>
+#include <str.h>
+#include <stdio.h>
+#include <assert.h>
+#include <async.h>
+#include <devman.h>
+#include <usbvirt/device.h>
+#include <usbvirt/ipc.h>
+
+#include <usb/debug.h>
+
+/** Current device. */
+static usbvirt_device_t *DEV = NULL;
+
+/** Main IPC call handling from virtual host controller.
+ *
+ * @param iid Caller identification.
+ * @param icall Initial incoming call.
+ */
+static void callback_connection(ipc_callid_t iid, ipc_call_t *icall)
+{
+	assert(DEV != NULL);
+
+	async_answer_0(iid, EOK);
+
+	while (true) {
+		ipc_callid_t callid;
+		ipc_call_t call;
+
+		callid = async_get_call(&call);
+		bool processed = usbvirt_ipc_handle_call(DEV, callid, &call);
+		if (!processed) {
+			if (!IPC_GET_IMETHOD(call)) {
+				async_answer_0(callid, EOK);
+				return;
+			} else
+				async_answer_0(callid, EINVAL);
+		}
+	}
+}
+
+/** Connect the device to the virtual host controller.
+ *
+ * @param dev The virtual device to be (virtually) plugged in.
+ * @param vhc_path Devman path to the virtual host controller.
+ * @return Error code.
+ */
+int usbvirt_device_plug(usbvirt_device_t *dev, const char *vhc_path)
+{
+	if (DEV != NULL)
+		return ELIMIT;
+	
+	devman_handle_t handle;
+	int rc = devman_device_get_handle(vhc_path, &handle, 0);
+	if (rc != EOK)
+		return rc;
+	
+	async_sess_t *hcd_sess =
+	    devman_device_connect(EXCHANGE_SERIALIZE, handle, 0);
+	if (!hcd_sess)
+		return ENOMEM;
+	
+	DEV = dev;
+	dev->vhc_sess = hcd_sess;
+	
+	async_exch_t *exch = async_exchange_begin(hcd_sess);
+	rc = async_connect_to_me(exch, 0, 0, 0, callback_connection);
+	async_exchange_end(exch);
+	
+	if (rc != EOK)
+		DEV = NULL;
+	
+	return rc;
+}
+
+/** Disconnect the device from virtual host controller.
+ *
+ * @param dev Device to be disconnected.
+ */
+void usbvirt_device_unplug(usbvirt_device_t *dev)
+{
+	async_hangup(dev->vhc_sess);
+}
+
+/**
+ * @}
+ */
Index: uspace/lib/usbvirt/src/ipc_dev.c
===================================================================
--- uspace/lib/usbvirt/src/ipc_dev.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbvirt/src/ipc_dev.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,297 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbvirt
+ * @{
+ */
+/** @file
+ * IPC wrappers, device side.
+ */
+#include <errno.h>
+#include <str.h>
+#include <stdio.h>
+#include <assert.h>
+#include <async.h>
+#include <devman.h>
+#include <usbvirt/device.h>
+#include <usbvirt/ipc.h>
+#include <usb/debug.h>
+
+/** Handle VHC request for device name.
+ *
+ * @param dev Target virtual device.
+ * @param iid Caller id.
+ * @param icall The call with the request.
+ */
+static void ipc_get_name(usbvirt_device_t *dev,
+    ipc_callid_t iid, ipc_call_t *icall)
+{
+	if (dev->name == NULL) {
+		async_answer_0(iid, ENOENT);
+	}
+
+	size_t size = str_size(dev->name);
+
+	ipc_callid_t callid;
+	size_t accepted_size;
+	if (!async_data_read_receive(&callid, &accepted_size)) {
+		async_answer_0(iid, EINVAL);
+		return;
+	}
+
+	if (accepted_size > size) {
+		accepted_size = size;
+	}
+	async_data_read_finalize(callid, dev->name, accepted_size);
+
+	async_answer_1(iid, EOK, accepted_size);
+}
+
+/** Handle VHC request for control read from the device.
+ *
+ * @param dev Target virtual device.
+ * @param iid Caller id.
+ * @param icall The call with the request.
+ */
+static void ipc_control_read(usbvirt_device_t *dev,
+    ipc_callid_t iid, ipc_call_t *icall)
+{
+	int rc;
+
+	void *setup_packet = NULL;
+	size_t setup_packet_len = 0;
+	size_t data_len = 0;
+
+	rc = async_data_write_accept(&setup_packet, false,
+	    1, 1024, 0, &setup_packet_len);
+	if (rc != EOK) {
+		async_answer_0(iid, rc);
+		return;
+	}
+
+	ipc_callid_t data_callid;
+	if (!async_data_read_receive(&data_callid, &data_len)) {
+		async_answer_0(iid, EPARTY);
+		free(setup_packet);
+		return;
+	}
+
+	void *buffer = malloc(data_len);
+	if (buffer == NULL) {
+		async_answer_0(iid, ENOMEM);
+		free(setup_packet);
+		return;
+	}
+
+	size_t actual_len;
+	rc = usbvirt_control_read(dev, setup_packet, setup_packet_len,
+	    buffer, data_len, &actual_len);
+
+	if (rc != EOK) {
+		async_answer_0(data_callid, rc);
+		async_answer_0(iid, rc);
+		free(setup_packet);
+		free(buffer);
+		return;
+	}
+
+	async_data_read_finalize(data_callid, buffer, actual_len);
+	async_answer_0(iid, EOK);
+
+	free(setup_packet);
+	free(buffer);
+}
+
+/** Handle VHC request for control write to the device.
+ *
+ * @param dev Target virtual device.
+ * @param iid Caller id.
+ * @param icall The call with the request.
+ */
+static void ipc_control_write(usbvirt_device_t *dev,
+    ipc_callid_t iid, ipc_call_t *icall)
+{
+	size_t data_buffer_len = IPC_GET_ARG1(*icall);
+	int rc;
+
+	void *setup_packet = NULL;
+	void *data_buffer = NULL;
+	size_t setup_packet_len = 0;
+
+	rc = async_data_write_accept(&setup_packet, false,
+	    1, 0, 0, &setup_packet_len);
+	if (rc != EOK) {
+		async_answer_0(iid, rc);
+		return;
+	}
+
+	if (data_buffer_len > 0) {
+		rc = async_data_write_accept(&data_buffer, false,
+		    1, 0, 0, &data_buffer_len);
+		if (rc != EOK) {
+			async_answer_0(iid, rc);
+			free(setup_packet);
+			return;
+		}
+	}
+
+	rc = usbvirt_control_write(dev, setup_packet, setup_packet_len,
+	    data_buffer, data_buffer_len);
+
+	async_answer_0(iid, rc);
+
+	free(setup_packet);
+	if (data_buffer != NULL) {
+		free(data_buffer);
+	}
+}
+
+/** Handle VHC request for data read from the device (in transfer).
+ *
+ * @param dev Target virtual device.
+ * @param iid Caller id.
+ * @param icall The call with the request.
+ */
+static void ipc_data_in(usbvirt_device_t *dev,
+    usb_transfer_type_t transfer_type,
+    ipc_callid_t iid, ipc_call_t *icall)
+{
+	usb_endpoint_t endpoint = IPC_GET_ARG1(*icall);
+
+	int rc;
+
+	size_t data_len = 0;
+	ipc_callid_t data_callid;
+	if (!async_data_read_receive(&data_callid, &data_len)) {
+		async_answer_0(iid, EPARTY);
+		return;
+	}
+
+	void *buffer = malloc(data_len);
+	if (buffer == NULL) {
+		async_answer_0(iid, ENOMEM);
+		return;
+	}
+
+	size_t actual_len;
+	rc = usbvirt_data_in(dev, transfer_type, endpoint,
+	    buffer, data_len, &actual_len);
+
+	if (rc != EOK) {
+		async_answer_0(data_callid, rc);
+		async_answer_0(iid, rc);
+		free(buffer);
+		return;
+	}
+
+	async_data_read_finalize(data_callid, buffer, actual_len);
+	async_answer_0(iid, EOK);
+
+	free(buffer);
+}
+
+/** Handle VHC request for data write to the device (out transfer).
+ *
+ * @param dev Target virtual device.
+ * @param iid Caller id.
+ * @param icall The call with the request.
+ */
+static void ipc_data_out(usbvirt_device_t *dev,
+    usb_transfer_type_t transfer_type,
+    ipc_callid_t iid, ipc_call_t *icall)
+{
+	usb_endpoint_t endpoint = IPC_GET_ARG1(*icall);
+
+	void *data_buffer = NULL;
+	size_t data_buffer_size = 0;
+
+	int rc = async_data_write_accept(&data_buffer, false,
+	    1, 0, 0, &data_buffer_size);
+	if (rc != EOK) {
+		async_answer_0(iid, rc);
+		return;
+	}
+
+	rc = usbvirt_data_out(dev, transfer_type, endpoint,
+	    data_buffer, data_buffer_size);
+
+	async_answer_0(iid, rc);
+
+	free(data_buffer);
+}
+
+/** Handle incoming IPC call for virtual USB device.
+ *
+ * @param dev Target USB device.
+ * @param callid Caller id.
+ * @param call Incoming call.
+ * @return Whether the call was handled.
+ */
+bool usbvirt_ipc_handle_call(usbvirt_device_t *dev,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	switch (IPC_GET_IMETHOD(*call)) {
+	case IPC_M_USBVIRT_GET_NAME:
+		ipc_get_name(dev, callid, call);
+		break;
+
+	case IPC_M_USBVIRT_CONTROL_READ:
+		ipc_control_read(dev, callid, call);
+		break;
+
+	case IPC_M_USBVIRT_CONTROL_WRITE:
+		ipc_control_write(dev, callid, call);
+		break;
+
+	case IPC_M_USBVIRT_INTERRUPT_IN:
+		ipc_data_in(dev, USB_TRANSFER_INTERRUPT, callid, call);
+		break;
+
+	case IPC_M_USBVIRT_BULK_IN:
+		ipc_data_in(dev, USB_TRANSFER_BULK, callid, call);
+		break;
+
+	case IPC_M_USBVIRT_INTERRUPT_OUT:
+		ipc_data_out(dev, USB_TRANSFER_INTERRUPT, callid, call);
+		break;
+
+	case IPC_M_USBVIRT_BULK_OUT:
+		ipc_data_out(dev, USB_TRANSFER_BULK, callid, call);
+		break;
+
+
+	default:
+		return false;
+	}
+
+	return true;
+}
+
+/**
+ * @}
+ */
Index: uspace/lib/usbvirt/src/ipc_hc.c
===================================================================
--- uspace/lib/usbvirt/src/ipc_hc.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbvirt/src/ipc_hc.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,316 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbvirt
+ * @{
+ */
+/** @file
+ * IPC wrappers, host controller side.
+ */
+#include <errno.h>
+#include <str.h>
+#include <stdio.h>
+#include <assert.h>
+#include <async.h>
+#include <devman.h>
+#include <usbvirt/device.h>
+#include <usbvirt/ipc.h>
+#include <usb/debug.h>
+
+/** Send control read transfer to virtual USB device.
+ *
+ * @param sess Session to the virtual device.
+ * @param ep Target endpoint number.
+ * @param setup_buffer Setup buffer.
+ * @param setup_buffer_size Setup buffer size in bytes.
+ * @param data_buffer Data buffer (DATA stage of control transfer).
+ * @param data_buffer_size Size of data buffer in bytes.
+ * @param data_transfered_size Number of actually transferred bytes.
+ *
+ * @return Error code.
+ *
+ */
+int usbvirt_ipc_send_control_read(async_sess_t *sess, void *setup_buffer,
+    size_t setup_buffer_size, void *data_buffer, size_t data_buffer_size,
+    size_t *data_transfered_size)
+{
+	if (!sess)
+		return EINVAL;
+	
+	if ((setup_buffer == NULL) || (setup_buffer_size == 0))
+		return EINVAL;
+	
+	if ((data_buffer == NULL) || (data_buffer_size == 0))
+		return EINVAL;
+	
+	async_exch_t *exch = async_exchange_begin(sess);
+	
+	aid_t opening_request = async_send_0(exch, IPC_M_USBVIRT_CONTROL_READ,
+	    NULL);
+	if (opening_request == 0) {
+		async_exchange_end(exch);
+		return ENOMEM;
+	}
+	
+	int rc = async_data_write_start(exch, setup_buffer, setup_buffer_size);
+	if (rc != EOK) {
+		async_exchange_end(exch);
+		async_wait_for(opening_request, NULL);
+		return rc;
+	}
+	
+	ipc_call_t data_request_call;
+	aid_t data_request = async_data_read(exch, data_buffer, data_buffer_size,
+	    &data_request_call);
+	
+	async_exchange_end(exch);
+	
+	if (data_request == 0) {
+		async_wait_for(opening_request, NULL);
+		return ENOMEM;
+	}
+	
+	sysarg_t data_request_rc;
+	sysarg_t opening_request_rc;
+	async_wait_for(data_request, &data_request_rc);
+	async_wait_for(opening_request, &opening_request_rc);
+	
+	if (data_request_rc != EOK) {
+		/* Prefer the return code of the opening request. */
+		if (opening_request_rc != EOK)
+			return (int) opening_request_rc;
+		else
+			return (int) data_request_rc;
+	}
+	
+	if (opening_request_rc != EOK)
+		return (int) opening_request_rc;
+	
+	if (data_transfered_size != NULL)
+		*data_transfered_size = IPC_GET_ARG2(data_request_call);
+	
+	return EOK;
+}
+
+/** Send control write transfer to virtual USB device.
+ *
+ * @param sess Session to the virtual device.
+ * @param ep Target endpoint number.
+ * @param setup_buffer Setup buffer.
+ * @param setup_buffer_size Setup buffer size in bytes.
+ * @param data_buffer Data buffer (DATA stage of control transfer).
+ * @param data_buffer_size Size of data buffer in bytes.
+ *
+ * @return Error code.
+ *
+ */
+int usbvirt_ipc_send_control_write(async_sess_t *sess, void *setup_buffer,
+    size_t setup_buffer_size, void *data_buffer, size_t data_buffer_size)
+{
+	if (!sess)
+		return EINVAL;
+	
+	if ((setup_buffer == NULL) || (setup_buffer_size == 0))
+		return EINVAL;
+	
+	if ((data_buffer_size > 0) && (data_buffer == NULL))
+		return EINVAL;
+	
+	async_exch_t *exch = async_exchange_begin(sess);
+	
+	aid_t opening_request = async_send_1(exch, IPC_M_USBVIRT_CONTROL_WRITE,
+	    data_buffer_size, NULL);
+	if (opening_request == 0) {
+		async_exchange_end(exch);
+		return ENOMEM;
+	}
+	
+	int rc = async_data_write_start(exch, setup_buffer, setup_buffer_size);
+	if (rc != EOK) {
+		async_exchange_end(exch);
+		async_wait_for(opening_request, NULL);
+		return rc;
+	}
+	
+	if (data_buffer_size > 0) {
+		rc = async_data_write_start(exch, data_buffer, data_buffer_size);
+		if (rc != EOK) {
+			async_exchange_end(exch);
+			async_wait_for(opening_request, NULL);
+			return rc;
+		}
+	}
+	
+	async_exchange_end(exch);
+	
+	sysarg_t opening_request_rc;
+	async_wait_for(opening_request, &opening_request_rc);
+	
+	return (int) opening_request_rc;
+}
+
+/** Request data transfer from virtual USB device.
+ *
+ * @param sess Session to the virtual device.
+ * @param ep Target endpoint number.
+ * @param tr_type Transfer type (interrupt or bulk).
+ * @param data Data buffer.
+ * @param data_size Size of the data buffer in bytes.
+ * @param act_size Number of actually returned bytes.
+ *
+ * @return Error code.
+ *
+ */
+int usbvirt_ipc_send_data_in(async_sess_t *sess, usb_endpoint_t ep,
+    usb_transfer_type_t tr_type, void *data, size_t data_size, size_t *act_size)
+{
+	if (!sess)
+		return EINVAL;
+	
+	usbvirt_hc_to_device_method_t method;
+	
+	switch (tr_type) {
+	case USB_TRANSFER_INTERRUPT:
+		method = IPC_M_USBVIRT_INTERRUPT_IN;
+		break;
+	case USB_TRANSFER_BULK:
+		method = IPC_M_USBVIRT_BULK_IN;
+		break;
+	default:
+		return EINVAL;
+	}
+	
+	if ((ep <= 0) || (ep >= USBVIRT_ENDPOINT_MAX))
+		return EINVAL;
+	
+	if ((data == NULL) || (data_size == 0))
+		return EINVAL;
+	
+	async_exch_t *exch = async_exchange_begin(sess);
+	
+	aid_t opening_request = async_send_2(exch, method, ep, tr_type, NULL);
+	if (opening_request == 0) {
+		async_exchange_end(exch);
+		return ENOMEM;
+	}
+	
+	ipc_call_t data_request_call;
+	aid_t data_request = async_data_read(exch, data, data_size,
+	    &data_request_call);
+	
+	async_exchange_end(exch);
+	
+	if (data_request == 0) {
+		async_wait_for(opening_request, NULL);
+		return ENOMEM;
+	}
+	
+	sysarg_t data_request_rc;
+	sysarg_t opening_request_rc;
+	async_wait_for(data_request, &data_request_rc);
+	async_wait_for(opening_request, &opening_request_rc);
+	
+	if (data_request_rc != EOK) {
+		/* Prefer the return code of the opening request. */
+		if (opening_request_rc != EOK)
+			return (int) opening_request_rc;
+		else
+			return (int) data_request_rc;
+	}
+	
+	if (opening_request_rc != EOK)
+		return (int) opening_request_rc;
+	
+	if (act_size != NULL)
+		*act_size = IPC_GET_ARG2(data_request_call);
+	
+	return EOK;
+}
+
+/** Send data to virtual USB device.
+ *
+ * @param sess Session to the virtual device.
+ * @param ep Target endpoint number.
+ * @param tr_type Transfer type (interrupt or bulk).
+ * @param data Data buffer.
+ * @param data_size Size of the data buffer in bytes.
+ *
+ * @return Error code.
+ *
+ */
+int usbvirt_ipc_send_data_out(async_sess_t *sess, usb_endpoint_t ep,
+    usb_transfer_type_t tr_type, void *data, size_t data_size)
+{
+	if (!sess)
+		return EINVAL;
+	
+	usbvirt_hc_to_device_method_t method;
+	
+	switch (tr_type) {
+	case USB_TRANSFER_INTERRUPT:
+		method = IPC_M_USBVIRT_INTERRUPT_OUT;
+		break;
+	case USB_TRANSFER_BULK:
+		method = IPC_M_USBVIRT_BULK_OUT;
+		break;
+	default:
+		return EINVAL;
+	}
+	
+	if ((ep <= 0) || (ep >= USBVIRT_ENDPOINT_MAX))
+		return EINVAL;
+	
+	if ((data == NULL) || (data_size == 0))
+		return EINVAL;
+	
+	async_exch_t *exch = async_exchange_begin(sess);
+	
+	aid_t opening_request = async_send_1(exch, method, ep, NULL);
+	if (opening_request == 0) {
+		async_exchange_end(exch);
+		return ENOMEM;
+	}
+	
+	int rc = async_data_write_start(exch, data, data_size);
+	
+	async_exchange_end(exch);
+	
+	if (rc != EOK) {
+		async_wait_for(opening_request, NULL);
+		return rc;
+	}
+	
+	sysarg_t opening_request_rc;
+	async_wait_for(opening_request, &opening_request_rc);
+	
+	return (int) opening_request_rc;
+}
+
+/**
+ * @}
+ */
Index: uspace/lib/usbvirt/src/private.h
===================================================================
--- uspace/lib/usbvirt/src/private.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbvirt/src/private.h	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbvirt
+ * @{
+ */
+/** @file
+ * Private definitions.
+ */
+#ifndef USBVIRT_PRIVATE_H_
+#define USBVIRT_PRIVATE_H_
+
+#include <usbvirt/device.h>
+
+int process_control_transfer(usbvirt_device_t *,
+    usbvirt_control_request_handler_t *,
+    usb_device_request_setup_packet_t *,
+    uint8_t *, size_t *);
+
+extern usbvirt_control_request_handler_t library_handlers[];
+
+#endif
+/**
+ * @}
+ */
Index: uspace/lib/usbvirt/src/stdreq.c
===================================================================
--- uspace/lib/usbvirt/src/stdreq.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbvirt/src/stdreq.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,223 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbvirt
+ * @{
+ */
+/** @file
+ * Standard control request handlers.
+ */
+#include "private.h"
+#include <usb/dev/request.h>
+#include <assert.h>
+#include <errno.h>
+
+/** Helper for replying to control read transfer from virtual USB device.
+ *
+ * This function takes care of copying data to answer buffer taking care
+ * of buffer sizes properly.
+ *
+ * @param setup_packet The setup packet.
+ * @param data Data buffer to write to.
+ * @param act_size Where to write actual size of returned data.
+ * @param actual_data Data to be returned.
+ * @param actual_data_size Size of answer data (@p actual_data) in bytes.
+ */
+void usbvirt_control_reply_helper(const usb_device_request_setup_packet_t *setup_packet,
+    uint8_t *data, size_t *act_size,
+    void *actual_data, size_t actual_data_size)
+{
+	size_t expected_size = setup_packet->length;
+	if (expected_size < actual_data_size) {
+		actual_data_size = expected_size;
+	}
+
+	memcpy(data, actual_data, actual_data_size);
+
+	if (act_size != NULL) {
+		*act_size = actual_data_size;
+	}
+}
+
+/** GET_DESCRIPTOR handler. */
+static int req_get_descriptor(usbvirt_device_t *device,
+    const usb_device_request_setup_packet_t *setup_packet, uint8_t *data, size_t *act_size)
+{
+	uint8_t type = setup_packet->value_high;
+	uint8_t index = setup_packet->value_low;
+
+	/*
+	 * Standard device descriptor.
+	 */
+	if ((type == USB_DESCTYPE_DEVICE) && (index == 0)) {
+		if (device->descriptors && device->descriptors->device) {
+			usbvirt_control_reply_helper(setup_packet, data, act_size,
+			    device->descriptors->device,
+			    device->descriptors->device->length);
+			return EOK;
+		} else {
+			return EFORWARD;
+		}
+	}
+
+	/*
+	 * Configuration descriptor together with interface, endpoint and
+	 * class-specific descriptors.
+	 */
+	if (type == USB_DESCTYPE_CONFIGURATION) {
+		if (!device->descriptors) {
+			return EFORWARD;
+		}
+		if (index >= device->descriptors->configuration_count) {
+			return EFORWARD;
+		}
+		/* Copy the data. */
+		usbvirt_device_configuration_t *config = &device->descriptors
+		    ->configuration[index];
+		uint8_t *all_data = malloc(config->descriptor->total_length);
+		if (all_data == NULL) {
+			return ENOMEM;
+		}
+
+		uint8_t *ptr = all_data;
+		memcpy(ptr, config->descriptor, config->descriptor->length);
+		ptr += config->descriptor->length;
+		size_t i;
+		for (i = 0; i < config->extra_count; i++) {
+			usbvirt_device_configuration_extras_t *extra
+			    = &config->extra[i];
+			memcpy(ptr, extra->data, extra->length);
+			ptr += extra->length;
+		}
+
+		usbvirt_control_reply_helper(setup_packet, data, act_size,
+		    all_data, config->descriptor->total_length);
+
+		free(all_data);
+
+		return EOK;
+	}
+
+	return EFORWARD;
+}
+
+static int req_set_address(usbvirt_device_t *device,
+    const usb_device_request_setup_packet_t *setup_packet, uint8_t *data, size_t *act_size)
+{
+	uint16_t new_address = setup_packet->value;
+	uint16_t zero1 = setup_packet->index;
+	uint16_t zero2 = setup_packet->length;
+
+	if ((zero1 != 0) || (zero2 != 0)) {
+		return EINVAL;
+	}
+
+	if (new_address > 127) {
+		return EINVAL;
+	}
+
+	device->address = new_address;
+
+	return EOK;
+}
+
+static int req_set_configuration(usbvirt_device_t *device,
+    const usb_device_request_setup_packet_t *setup_packet, uint8_t *data, size_t *act_size)
+{
+	uint16_t configuration_value = setup_packet->value;
+	uint16_t zero1 = setup_packet->index;
+	uint16_t zero2 = setup_packet->length;
+
+	if ((zero1 != 0) || (zero2 != 0)) {
+		return EINVAL;
+	}
+
+	/*
+	 * Configuration value is 1 byte information.
+	 */
+	if (configuration_value > 255) {
+		return EINVAL;
+	}
+
+	/*
+	 * Do nothing when in default state. According to specification,
+	 * this is not specified.
+	 */
+	if (device->state == USBVIRT_STATE_DEFAULT) {
+		return EOK;
+	}
+
+	usbvirt_device_state_t new_state;
+	if (configuration_value == 0) {
+		new_state = USBVIRT_STATE_ADDRESS;
+	} else {
+		// FIXME: check that this configuration exists
+		new_state = USBVIRT_STATE_CONFIGURED;
+	}
+
+	if (device->ops && device->ops->state_changed) {
+		device->ops->state_changed(device, device->state, new_state);
+	}
+	device->state = new_state;
+
+	return EOK;
+}
+
+/** Standard request handlers. */
+usbvirt_control_request_handler_t library_handlers[] = {
+	{
+		.req_direction = USB_DIRECTION_OUT,
+		.req_recipient = USB_REQUEST_RECIPIENT_DEVICE,
+		.req_type = USB_REQUEST_TYPE_STANDARD,
+		.request = USB_DEVREQ_SET_ADDRESS,
+		.name = "SetAddress",
+		.callback = req_set_address
+	},
+	{
+		.req_direction = USB_DIRECTION_IN,
+		.req_recipient = USB_REQUEST_RECIPIENT_DEVICE,
+		.req_type = USB_REQUEST_TYPE_STANDARD,
+		.request = USB_DEVREQ_GET_DESCRIPTOR,
+		.name = "GetDescriptor",
+		.callback = req_get_descriptor
+	},
+	{
+		.req_direction = USB_DIRECTION_OUT,
+		.req_recipient = USB_REQUEST_RECIPIENT_DEVICE,
+		.req_type = USB_REQUEST_TYPE_STANDARD,
+		.request = USB_DEVREQ_SET_CONFIGURATION,
+		.name = "SetConfiguration",
+		.callback = req_set_configuration
+	},
+
+	{ .callback = NULL }
+};
+
+/**
+ * @}
+ */
Index: uspace/lib/usbvirt/src/transfer.c
===================================================================
--- uspace/lib/usbvirt/src/transfer.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
+++ uspace/lib/usbvirt/src/transfer.c	(revision f2a45d9dfce1c48cd7ca84792b0eedb9b0920ac8)
@@ -0,0 +1,190 @@
+/*
+ * Copyright (c) 2011 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libusbvirt
+ * @{
+ */
+/** @file
+ * Transfer handling.
+ */
+#include <usbvirt/device.h>
+#include <usb/debug.h>
+#include <errno.h>
+#include <assert.h>
+#include "private.h"
+
+/** Process a control transfer to the virtual USB device.
+ *
+ * @param dev Target device.
+ * @param setup Setup packet data.
+ * @param setup_size Size of setup packet.
+ * @param data Extra data (DATA stage).
+ * @param data_size Size of extra data in bytes.
+ * @param data_size_sent Number of actually send bytes during the transfer
+ *	(only used for READ transfers).
+ * @return Error code.
+ */
+static int usbvirt_control_transfer(usbvirt_device_t *dev,
+    void *setup, size_t setup_size,
+    void *data, size_t data_size, size_t *data_size_sent)
+{
+	assert(dev);
+	assert(dev->ops);
+
+	if (setup_size != sizeof(usb_device_request_setup_packet_t)) {
+		return ESTALL;
+	}
+	usb_device_request_setup_packet_t *setup_packet = setup;
+	if (data_size != setup_packet->length) {
+		return ESTALL;
+	}
+
+	int rc;
+
+	/* Run user handler first. */
+	rc = process_control_transfer(dev, dev->ops->control,
+	    setup_packet, data, data_size_sent);
+	if (rc != EFORWARD) {
+		return rc;
+	}
+
+	/* Run the library handlers afterwards. */
+	rc = process_control_transfer(dev, library_handlers,
+	    setup_packet, data, data_size_sent);
+
+	if (rc == EFORWARD) {
+		usb_log_warning("Control transfer {%s (%s)} not handled.\n",
+		    usb_debug_str_buffer(setup, setup_size, 10),
+		    setup_packet->request_type & 0x80
+		    ? "IN" : usb_debug_str_buffer(data, data_size, 10));
+		rc = EBADCHECKSUM;
+	}
+
+	return rc;
+}
+
+/** Issue a control write transfer to virtual USB device.
+ *
+ * @see usbvirt_control_transfer
+ *
+ * @param dev Target virtual device.
+ * @param setup Setup data.
+ * @param setup_size Size of setup packet.
+ * @param data Extra data (DATA stage).
+ * @param data_size Size of extra data buffer in bytes.
+ * @return Error code.
+ */
+int usbvirt_control_write(usbvirt_device_t *dev, void *setup, size_t setup_size,
+    void *data, size_t data_size)
+{
+	return usbvirt_control_transfer(dev, setup, setup_size,
+	    data, data_size, NULL);
+}
+
+/** Issue a control read transfer to virtual USB device.
+ *
+ * @see usbvirt_control_transfer
+ *
+ * @param dev Target virtual device.
+ * @param setup Setup data.
+ * @param setup_size Size of setup packet.
+ * @param data Extra data (DATA stage).
+ * @param data_size Size of extra data buffer in bytes.
+ * @param data_size_sent Number of actually send bytes during the transfer.
+ * @return Error code.
+ */
+int usbvirt_control_read(usbvirt_device_t *dev, void *setup, size_t setup_size,
+    void *data, size_t data_size, size_t *data_size_sent)
+{
+	return usbvirt_control_transfer(dev, setup, setup_size,
+	    data, data_size, data_size_sent);
+}
+
+/** Send data to virtual USB device.
+ *
+ * @param dev Target virtual device.
+ * @param transf_type Transfer type (interrupt, bulk).
+ * @param endpoint Endpoint number.
+ * @param data Data sent from the driver to the device.
+ * @param data_size Size of the @p data buffer in bytes.
+ * @return Error code.
+ */
+int usbvirt_data_out(usbvirt_device_t *dev, usb_transfer_type_t transf_type,
+    usb_endpoint_t endpoint, void *data, size_t data_size)
+{
+	if ((endpoint <= 0) || (endpoint >= USBVIRT_ENDPOINT_MAX)) {
+		return ERANGE;
+	}
+	if ((dev->ops == NULL) || (dev->ops->data_out[endpoint] == NULL)) {
+		return ENOTSUP;
+	}
+
+	int rc = dev->ops->data_out[endpoint](dev, endpoint, transf_type,
+	    data, data_size);
+
+	return rc;
+}
+
+/** Request data from virtual USB device.
+ *
+ * @param dev Target virtual device.
+ * @param transf_type Transfer type (interrupt, bulk).
+ * @param endpoint Endpoint number.
+ * @param data Where to stored data the device returns to the driver.
+ * @param data_size Size of the @p data buffer in bytes.
+ * @param data_size_sent Number of actually written bytes.
+ * @return Error code.
+ */
+int usbvirt_data_in(usbvirt_device_t *dev, usb_transfer_type_t transf_type,
+    usb_endpoint_t endpoint, void *data, size_t data_size, size_t *data_size_sent)
+{
+	if ((endpoint <= 0) || (endpoint >= USBVIRT_ENDPOINT_MAX)) {
+		return ERANGE;
+	}
+	if ((dev->ops == NULL) || (dev->ops->data_in[endpoint] == NULL)) {
+		return ENOTSUP;
+	}
+
+	size_t data_size_sent_tmp;
+	int rc = dev->ops->data_in[endpoint](dev, endpoint, transf_type,
+	    data, data_size, &data_size_sent_tmp);
+
+	if (rc != EOK) {
+		return rc;
+	}
+
+	if (data_size_sent != NULL) {
+		*data_size_sent = data_size_sent_tmp;
+	}
+
+	return EOK;
+}
+
+/**
+ * @}
+ */
