Index: uspace/lib/usb/include/usb/devdrv.h
===================================================================
--- uspace/lib/usb/include/usb/devdrv.h	(revision 159b91f4767c38fbab0288369a2ec23b232480a5)
+++ uspace/lib/usb/include/usb/devdrv.h	(revision 0b4e7ca5837665462dd121f3429fdf63fd6d33d7)
@@ -79,4 +79,6 @@
 	 */
 	usb_endpoint_mapping_t *pipes;
+	/** Number of other endpoint pipes. */
+	size_t pipes_count;
 	/** Current interface.
 	 * Usually, drivers operate on single interface only.
@@ -157,4 +159,7 @@
 int usb_driver_main(usb_driver_t *);
 
+int usb_device_select_interface(usb_device_t *, uint8_t,
+    usb_endpoint_description_t **);
+
 typedef bool (*usb_polling_callback_t)(usb_device_t *,
     uint8_t *, size_t, void *);