Index: uspace/lib/usb/include/usb/pipes.h
===================================================================
--- uspace/lib/usb/include/usb/pipes.h	(revision 6865243cd55833c9c1472bd831983d5ebe21226e)
+++ uspace/lib/usb/include/usb/pipes.h	(revision 6865243cd55833c9c1472bd831983d5ebe21226e)
@@ -0,0 +1,117 @@
+/*
+ * 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
+ * Communication between device drivers and host controller driver.
+ */
+#ifndef LIBUSB_PIPES_H_
+#define LIBUSB_PIPES_H_
+
+#include <sys/types.h>
+#include <usb/usb.h>
+#include <ipc/devman.h>
+#include <driver.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;
+} 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).
+ */
+typedef struct {
+	/** 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;
+
+	/** Phone to the host controller.
+	 * Negative when no session is active.
+	 */
+	int hc_phone;
+} usb_endpoint_pipe_t;
+
+
+int usb_device_connection_initialize(usb_device_connection_t *, device_t *);
+
+int usb_endpoint_pipe_initialize(usb_endpoint_pipe_t *,
+    usb_device_connection_t *,
+    usb_endpoint_t, usb_transfer_type_t, usb_direction_t);
+int usb_endpoint_pipe_initialize_default_control(usb_endpoint_pipe_t *,
+    usb_device_connection_t *);
+
+
+int usb_endpoint_pipe_start_session(usb_endpoint_pipe_t *);
+int usb_endpoint_pipe_end_session(usb_endpoint_pipe_t *);
+
+int usb_endpoint_pipe_read(usb_endpoint_pipe_t *, void *, size_t, size_t *);
+int usb_endpoint_pipe_write(usb_endpoint_pipe_t *, void *, size_t);
+
+int usb_endpoint_pipe_control_read(usb_endpoint_pipe_t *, void *, size_t,
+    void *, size_t, size_t *);
+int usb_endpoint_pipe_control_write(usb_endpoint_pipe_t *, void *, size_t,
+    void *, size_t);
+
+
+
+int usb_endpoint_pipe_async_read(usb_endpoint_pipe_t *, void *, size_t,
+    size_t *, usb_handle_t *);
+int usb_endpoint_pipe_async_write(usb_endpoint_pipe_t *, void *, size_t,
+    usb_handle_t *);
+
+int usb_endpoint_pipe_async_control_read(usb_endpoint_pipe_t *, void *, size_t,
+    void *, size_t, size_t *, usb_handle_t *);
+int usb_endpoint_pipe_async_control_write(usb_endpoint_pipe_t *, void *, size_t,
+    void *, size_t, usb_handle_t *);
+
+int usb_endpoint_pipe_wait_for(usb_endpoint_pipe_t *, usb_handle_t);
+
+#endif
+/**
+ * @}
+ */