Index: uspace/lib/drv/Makefile
===================================================================
--- uspace/lib/drv/Makefile	(revision 0b5a41318bb6a61d594dc8dff3453b5d212638ba)
+++ uspace/lib/drv/Makefile	(revision 91db50ac4a0d8739daf1220f83a40c68c562e4cd)
@@ -29,5 +29,5 @@
 
 USPACE_PREFIX = ../..
-EXTRA_CFLAGS = -Iinclude
+EXTRA_CFLAGS = -Iinclude -I$(LIB_PREFIX)
 LIBRARY = libdrv
 
@@ -36,4 +36,5 @@
 	generic/dev_iface.c \
 	generic/remote_res.c \
+	generic/remote_usb.c \
 	generic/remote_char.c
 
Index: uspace/lib/drv/generic/dev_iface.c
===================================================================
--- uspace/lib/drv/generic/dev_iface.c	(revision 0b5a41318bb6a61d594dc8dff3453b5d212638ba)
+++ uspace/lib/drv/generic/dev_iface.c	(revision 91db50ac4a0d8739daf1220f83a40c68c562e4cd)
@@ -39,9 +39,11 @@
 #include "remote_res.h"
 #include "remote_char.h"
+#include "remote_usb.h"
 
 static iface_dipatch_table_t remote_ifaces = {
 	.ifaces = {
 		&remote_res_iface,
-		&remote_char_iface
+		&remote_char_iface,
+		&remote_usb_iface
 	}
 };
Index: uspace/lib/drv/generic/remote_usb.c
===================================================================
--- uspace/lib/drv/generic/remote_usb.c	(revision 91db50ac4a0d8739daf1220f83a40c68c562e4cd)
+++ uspace/lib/drv/generic/remote_usb.c	(revision 91db50ac4a0d8739daf1220f83a40c68c562e4cd)
@@ -0,0 +1,84 @@
+/*
+ * 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 <ipc/ipc.h>
+#include <async.h>
+#include <errno.h>
+
+#include "usb_iface.h"
+#include "driver.h"
+
+static void remote_usb_get_buffer(device_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usb_interrupt_out(device_t *, void *, ipc_callid_t, ipc_call_t *);
+static void remote_usb_interrupt_in(device_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_buffer,
+	&remote_usb_interrupt_out,
+	&remote_usb_interrupt_in
+};
+
+/** 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_buffer(device_t *device, void *iface,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+	ipc_answer_0(callid, ENOTSUP);
+}
+
+void remote_usb_interrupt_out(device_t *device, void *iface,
+	    ipc_callid_t callid, ipc_call_t *call)
+{
+	ipc_answer_0(callid, ENOTSUP);
+}
+
+void remote_usb_interrupt_in(device_t *device, void *iface,
+	    ipc_callid_t callid, ipc_call_t *call)
+{
+	ipc_answer_0(callid, ENOTSUP);
+}
+
+/**
+ * @}
+ */
Index: uspace/lib/drv/include/remote_usb.h
===================================================================
--- uspace/lib/drv/include/remote_usb.h	(revision 91db50ac4a0d8739daf1220f83a40c68c562e4cd)
+++ uspace/lib/drv/include/remote_usb.h	(revision 91db50ac4a0d8739daf1220f83a40c68c562e4cd)
@@ -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_
+
+remote_iface_t remote_usb_iface;
+
+#endif
+
+/**
+ * @}
+ */
Index: uspace/lib/drv/include/usb_iface.h
===================================================================
--- uspace/lib/drv/include/usb_iface.h	(revision 91db50ac4a0d8739daf1220f83a40c68c562e4cd)
+++ uspace/lib/drv/include/usb_iface.h	(revision 91db50ac4a0d8739daf1220f83a40c68c562e4cd)
@@ -0,0 +1,169 @@
+/*
+ * 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 usb
+ * @{
+ */
+/** @file
+ * @brief USB interface definition.
+ */
+
+#ifndef LIBDRV_USB_IFACE_H_
+#define LIBDRV_USB_IFACE_H_
+
+#include "driver.h"
+#include <usb/usb.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_USB_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 buffer size
+ * - 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_USB_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
+ *   - argument #3 is buffer size
+ * - the call is not answered until the device returns some data (or until
+ *   error occurs)
+ * - if the call is answered with EOK, first argument of the answer is buffer
+ *   hash that could be used to retrieve the actual data
+ *
+ * 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.
+ *
+ * The mentioned data retrieval can be done any time after receiving EOK
+ * answer to IN method.
+ * This retrieval is done using the IPC_M_USB_GET_BUFFER where
+ * the first argument is buffer hash from call answer.
+ * This call must be immediately followed by data read-in and after the
+ * data are transferred, the initial call (IPC_M_USB_GET_BUFFER)
+ * is answered. Each buffer can be retrieved only once.
+ *
+ * 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 data buffer.
+	 * See explanation at usb_method_t.
+	 */
+	IPC_M_USB_GET_BUFFER,
+
+
+	/** Send interrupt data to device.
+	 * See explanation at usb_method_t (OUT transaction).
+	 */
+	IPC_M_USB_INTERRUPT_OUT,
+
+	/** Get interrupt data from device.
+	 * See explanation at usb_method_t (IN transaction).
+	 */
+	IPC_M_USB_INTERRUPT_IN,
+
+
+	/** Start WRITE control transfer.
+	 * See explanation at usb_method_t (OUT transaction).
+	 */
+	IPC_M_USB_CONTROL_WRITE_SETUP,
+
+	/** Send control-transfer data to device.
+	 * See explanation at usb_method_t (OUT transaction).
+	 */
+	IPC_M_USB_CONTROL_WRITE_DATA,
+
+	/** Terminate WRITE control transfer.
+	 * See explanation at usb_method_t (NO-DATA transaction).
+	 */
+	IPC_M_USB_CONTROL_WRITE_STATUS,
+
+
+
+	/** Start READ control transfer.
+	 * See explanation at usb_method_t (OUT transaction).
+	 */
+	IPC_M_USB_CONTROL_READ_SETUP,
+
+	/** Get control-transfer data from device.
+	 * See explanation at usb_method_t (IN transaction).
+	 */
+	IPC_M_USB_CONTROL_READ_DATA,
+
+	/** Terminate READ control transfer.
+	 * See explanation at usb_method_t (NO-DATA transaction).
+	 */
+	IPC_M_USB_CONTROL_READ_STATUS,
+
+
+	/* IPC_M_USB_ */
+} usb_iface_funcs_t;
+
+/** Callback for outgoing transfer. */
+typedef void (*usb_iface_transfer_out_callback_t)(device_t *,
+    usb_transaction_outcome_t, void *);
+
+/** Callback for incoming transfer. */
+typedef void (*usb_iface_transfer_in_callback_t)(device_t *,
+    usb_transaction_outcome_t, size_t, void *);
+
+/** USB devices communication interface. */
+typedef struct {
+	int (*interrupt_out)(device_t *, usb_endpoint_t,
+	    void *, size_t,
+	    usb_iface_transfer_out_callback_t, void *);
+	int (*interrupt_in)(device_t *, usb_endpoint_t,
+	    void *, size_t,
+	    usb_iface_transfer_in_callback_t, void *);
+} usb_iface_t;
+
+
+#endif
+/**
+ * @}
+ */
