Index: uspace/lib/usb/include/usb/host/bandwidth.h
===================================================================
--- uspace/lib/usb/include/usb/host/bandwidth.h	(revision da9ebcaebe3f2f652690f890a79e9d9f49d48083)
+++ uspace/lib/usb/include/usb/host/bandwidth.h	(revision da9ebcaebe3f2f652690f890a79e9d9f49d48083)
@@ -0,0 +1,75 @@
+/*
+ * 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 libusb
+ * @{
+ */
+/** @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 LIBUSB_HOST_BANDWIDTH_H
+#define LIBUSB_HOST_BANDWIDTH_H
+
+#include <adt/hash_table.h>
+#include <fibril_synch.h>
+#include <usb/usb.h>
+
+typedef struct bandwidth {
+	hash_table_t reserved;
+	fibril_mutex_t guard;
+	size_t free;
+} bandwidth_t;
+
+int bandwidth_init(bandwidth_t *instance);
+
+void bandwidth_destroy(bandwidth_t *instance);
+
+int bandwidth_reserve(bandwidth_t *instance, usb_address_t address,
+    usb_endpoint_t endpoint, usb_transfer_type_t transfer_type,
+    size_t max_packet_size, size_t size, unsigned interval);
+
+int bandwidth_release(bandwidth_t *instance, usb_address_t address,
+    usb_endpoint_t endpoint, usb_transfer_type_t transfer_type,
+    size_t max_packet_size, size_t size, unsigned interval);
+
+int bandwidth_use(bandwidth_t *instance, usb_address_t address,
+    usb_endpoint_t endpoint, usb_transfer_type_t transfer_type,
+    size_t max_packet_size, size_t size, unsigned interval);
+
+int bandwidth_free(bandwidth_t *instance, usb_address_t address,
+    usb_endpoint_t endpoint, usb_transfer_type_t transfer_type,
+    size_t max_packet_size, size_t size, unsigned interval);
+
+#endif
+/**
+ * @}
+ */