Index: uspace/lib/drv/generic/remote_usb.c
===================================================================
--- uspace/lib/drv/generic/remote_usb.c	(revision 20eaa82bcd1e1ed452c2148cd68afde550e29457)
+++ uspace/lib/drv/generic/remote_usb.c	(revision b7db0091d48cc520f1e342189ef375e6989ea358)
@@ -175,28 +175,57 @@
 } pack8_t;
 
-int usb_register_endpoint(async_exch_t *exch, usb_endpoint_t endpoint,
-    usb_transfer_type_t type, usb_direction_t direction,
-    size_t mps, unsigned packets, unsigned interval)
-{
-	if (!exch)
-		return EBADMEM;
-	pack8_t pack;
-	pack.arr[0] = type;
-	pack.arr[1] = direction;
-	pack.arr[2] = interval;
-	pack.arr[3] = packets;
-
-	return async_req_4_0(exch, DEV_IFACE_ID(USB_DEV_IFACE),
-	    IPC_M_USB_REGISTER_ENDPOINT, endpoint, pack.arg, mps);
-
-}
-
-int usb_unregister_endpoint(async_exch_t *exch, usb_endpoint_t endpoint,
-    usb_direction_t direction)
-{
-	if (!exch)
-		return EBADMEM;
-	return async_req_3_0(exch, DEV_IFACE_ID(USB_DEV_IFACE),
-	    IPC_M_USB_UNREGISTER_ENDPOINT, endpoint, direction);
+int usb_register_endpoint(async_exch_t *exch,
+	usb_endpoint_desc_t *endpoint_desc)
+{
+	if (!exch)
+		return EBADMEM;
+
+	aid_t opening_request = async_send_1(exch,
+	    DEV_IFACE_ID(USB_DEV_IFACE), IPC_M_USB_REGISTER_ENDPOINT, NULL);
+
+	if (opening_request == 0) {
+		return ENOMEM;
+	}
+
+	const int ret = async_data_write_start(exch, (void *) endpoint_desc,
+		sizeof(usb_endpoint_desc_t));
+
+	if (ret != EOK) {
+		async_forget(opening_request);
+		return ret;
+	}
+
+	/* Wait for the answer. */
+	sysarg_t opening_request_rc;
+	async_wait_for(opening_request, &opening_request_rc);
+
+	return (int) opening_request_rc;
+}
+
+int usb_unregister_endpoint(async_exch_t *exch,
+	usb_endpoint_desc_t *endpoint_desc)
+{
+	if (!exch)
+		return EBADMEM;
+
+	aid_t opening_request = async_send_1(exch,
+		DEV_IFACE_ID(USB_DEV_IFACE), IPC_M_USB_UNREGISTER_ENDPOINT, NULL);
+
+	if (opening_request == 0) {
+		return ENOMEM;
+	}
+
+	const int ret = async_data_write_start(exch, endpoint_desc,
+		sizeof(usb_endpoint_desc_t));
+	if (ret != EOK) {
+		async_forget(opening_request);
+		return ret;
+	}
+
+	/* Wait for the answer. */
+	sysarg_t opening_request_rc;
+	async_wait_for(opening_request, &opening_request_rc);
+
+	return (int) opening_request_rc;
 }
 
@@ -317,4 +346,10 @@
 };
 
+typedef struct {
+	ipc_callid_t caller;
+	ipc_callid_t data_caller;
+	void *buffer;
+} async_transaction_t;
+
 void remote_usb_get_my_interface(ddf_fun_t *fun, void *iface,
     ipc_callid_t callid, ipc_call_t *call)
@@ -417,5 +452,9 @@
     ipc_callid_t callid, ipc_call_t *call)
 {
-	usb_iface_t *usb_iface = (usb_iface_t *) iface;
+	assert(fun);
+	assert(iface);
+	assert(call);
+
+	const usb_iface_t *usb_iface = iface;
 
 	if (!usb_iface->register_endpoint) {
@@ -424,17 +463,25 @@
 	}
 
-	const usb_endpoint_t endpoint = DEV_IPC_GET_ARG1(*call);
-	const pack8_t pack = { .arg = DEV_IPC_GET_ARG2(*call)};
-	const size_t max_packet_size = DEV_IPC_GET_ARG3(*call);
-
-	const usb_transfer_type_t transfer_type = pack.arr[0];
-	const usb_direction_t direction = pack.arr[1];
-	unsigned packets = pack.arr[2];
-	unsigned interval = pack.arr[3];
-
-	const int ret = usb_iface->register_endpoint(fun, endpoint,
-	    transfer_type, direction, max_packet_size, packets, interval);
-
-	async_answer_0(callid, ret);
+	void *buffer = malloc(sizeof(usb_endpoint_desc_t));
+	if (!buffer) {
+		async_answer_0(callid, ENOMEM);
+		return;
+	}
+
+	size_t size = 0;
+	int rc = async_data_write_accept(&buffer, false,
+		1, sizeof(usb_endpoint_desc_t), 0, &size);
+
+	if (rc != EOK) {
+		free(buffer);
+		async_answer_0(callid, rc);
+		return;
+	}
+
+	usb_endpoint_desc_t *endpoint_desc = (usb_endpoint_desc_t *) buffer;
+	rc = usb_iface->register_endpoint(fun, endpoint_desc);
+
+	free(buffer);
+	async_answer_0(callid, rc);
 }
 
@@ -442,5 +489,9 @@
     ipc_callid_t callid, ipc_call_t *call)
 {
-	usb_iface_t *usb_iface = (usb_iface_t *) iface;
+	assert(fun);
+	assert(iface);
+	assert(call);
+
+	const usb_iface_t *usb_iface = iface;
 
 	if (!usb_iface->unregister_endpoint) {
@@ -449,17 +500,28 @@
 	}
 
-	usb_endpoint_t endpoint = (usb_endpoint_t) DEV_IPC_GET_ARG1(*call);
-	usb_direction_t direction = (usb_direction_t) DEV_IPC_GET_ARG2(*call);
-
-	int rc = usb_iface->unregister_endpoint(fun, endpoint, direction);
-
-	async_answer_0(callid, rc);
-}
-
-typedef struct {
-	ipc_callid_t caller;
-	ipc_callid_t data_caller;
-	void *buffer;
-} async_transaction_t;
+	void *buffer = malloc(sizeof(usb_endpoint_desc_t));
+	if (!buffer) {
+		async_answer_0(callid, ENOMEM);
+		return;
+	}
+
+	size_t size = 0;
+	int rc = async_data_write_accept(&buffer, false,
+		1, sizeof(usb_endpoint_desc_t), 0, &size);
+
+	if (rc != EOK) {
+		free(buffer);
+		async_answer_0(callid, rc);
+		return;
+	}
+
+	usb_endpoint_desc_t *endpoint_desc = (usb_endpoint_desc_t *) buffer;
+	usb_iface->unregister_endpoint(fun, endpoint_desc);
+
+	free(buffer);
+	if (rc != EOK) {
+		async_answer_0(callid, rc);
+	}
+}
 
 static void async_transaction_destroy(async_transaction_t *trans)
Index: uspace/lib/drv/include/usb_iface.h
===================================================================
--- uspace/lib/drv/include/usb_iface.h	(revision 20eaa82bcd1e1ed452c2148cd68afde550e29457)
+++ uspace/lib/drv/include/usb_iface.h	(revision b7db0091d48cc520f1e342189ef375e6989ea358)
@@ -57,8 +57,6 @@
 extern int usb_device_remove(async_exch_t *, unsigned port);
 
-extern int usb_register_endpoint(async_exch_t *, usb_endpoint_t,
-    usb_transfer_type_t, usb_direction_t, size_t, unsigned, unsigned);
-extern int usb_unregister_endpoint(async_exch_t *, usb_endpoint_t,
-    usb_direction_t);
+extern int usb_register_endpoint(async_exch_t *, usb_endpoint_desc_t *);
+extern int usb_unregister_endpoint(async_exch_t *, usb_endpoint_desc_t *);
 extern int usb_read(async_exch_t *, usb_endpoint_t, uint64_t, void *, size_t,
     size_t *);
@@ -83,8 +81,6 @@
 	int (*device_remove)(ddf_fun_t *, unsigned);
 
-	int (*register_endpoint)(ddf_fun_t *, usb_endpoint_t,
-	    usb_transfer_type_t, usb_direction_t, size_t, unsigned, unsigned);
-	int (*unregister_endpoint)(ddf_fun_t *, usb_endpoint_t,
-	    usb_direction_t);
+	int (*register_endpoint)(ddf_fun_t *, usb_endpoint_desc_t *);
+	int (*unregister_endpoint)(ddf_fun_t *, usb_endpoint_desc_t *);
 
 	int (*read)(ddf_fun_t *, usb_endpoint_t, uint64_t, uint8_t *, size_t,
Index: uspace/lib/usb/include/usb/usb.h
===================================================================
--- uspace/lib/usb/include/usb/usb.h	(revision 20eaa82bcd1e1ed452c2148cd68afde550e29457)
+++ uspace/lib/usb/include/usb/usb.h	(revision b7db0091d48cc520f1e342189ef375e6989ea358)
@@ -163,5 +163,5 @@
 
 
-/** USB complete address type. 
+/** USB complete address type.
  * Pair address + endpoint is identification of transaction recipient.
  */
@@ -173,4 +173,28 @@
 	uint32_t packed;
 } usb_target_t;
+
+/** Description of usb endpoint.
+ */
+typedef struct {
+	/** 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;
+
+	/** Number of packets per frame/uframe.
+	 * Only valid for HS INT and ISO transfers. All others should set to 1*/
+	unsigned packets;
+
+	struct {
+		unsigned polling_interval;
+	} usb2;
+} usb_endpoint_desc_t;
 
 /** Check USB target for allowed values (address and endpoint).
Index: uspace/lib/usbdev/include/usb/dev/pipes.h
===================================================================
--- uspace/lib/usbdev/include/usb/dev/pipes.h	(revision 20eaa82bcd1e1ed452c2148cd68afde550e29457)
+++ uspace/lib/usbdev/include/usb/dev/pipes.h	(revision b7db0091d48cc520f1e342189ef375e6989ea358)
@@ -50,25 +50,10 @@
  */
 typedef struct {
-	/** 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;
-
-	/** Number of packets per frame/uframe.
-	 * Only valid for HS INT and ISO transfers. All others should set to 1*/
-	unsigned packets;
-
+	/** Endpoint description */
+	usb_endpoint_desc_t desc;
 	/** Whether to automatically reset halt on the endpoint.
 	 * Valid only for control endpoint zero.
 	 */
 	bool auto_reset_halt;
-
 	/** The connection used for sending the data. */
 	usb_dev_session_t *bus_session;
Index: uspace/lib/usbdev/src/devdrv.c
===================================================================
--- uspace/lib/usbdev/src/devdrv.c	(revision 20eaa82bcd1e1ed452c2148cd68afde550e29457)
+++ uspace/lib/usbdev/src/devdrv.c	(revision b7db0091d48cc520f1e342189ef375e6989ea358)
@@ -56,11 +56,11 @@
 	/** Connection to device on USB bus */
 	usb_dev_session_t *bus_session;
-	
+
 	/** devman handle */
 	devman_handle_t handle;
-	
+
 	/** The default control pipe. */
 	usb_pipe_t ctrl_pipe;
-	
+
 	/** Other endpoint pipes.
 	 *
@@ -69,8 +69,8 @@
 	 */
 	usb_endpoint_mapping_t *pipes;
-	
+
 	/** Number of other endpoint pipes. */
 	size_t pipes_count;
-	
+
 	/** Current interface.
 	 *
@@ -79,14 +79,14 @@
 	 */
 	int interface_no;
-	
+
 	/** Alternative interfaces. */
 	usb_alternate_interfaces_t alternate_interfaces;
-	
+
 	/** Some useful descriptors for USB device. */
 	usb_device_descriptors_t descriptors;
-	
+
 	/** Generic DDF device backing this one. DO NOT TOUCH! */
 	ddf_dev_t *ddf_dev;
-	
+
 	/** Custom driver data.
 	 *
@@ -146,5 +146,5 @@
 		return rc;
 	}
-	
+
 	/* Change current alternative */
 	usb_dev->alternate_interfaces.current = alternate_setting;
@@ -296,5 +296,5 @@
 	assert(usb_dev);
 	assert(usb_dev->pipes || usb_dev->pipes_count == 0);
-	
+
 	/* Destroy the pipes. */
 	for (size_t i = 0; i < usb_dev->pipes_count; ++i) {
@@ -304,5 +304,5 @@
 			usb_pipe_unregister(&usb_dev->pipes[i].pipe);
 	}
-	
+
 	free(usb_dev->pipes);
 	usb_dev->pipes = NULL;
@@ -332,5 +332,5 @@
 	assert(usb_dev);
 	for (unsigned i = 0; i < usb_dev->pipes_count; ++i) {
-		if (usb_dev->pipes[i].pipe.endpoint_no == ep)
+		if (usb_dev->pipes[i].pipe.desc.endpoint_no == ep)
 			return &usb_dev->pipes[i];
 	}
@@ -462,9 +462,9 @@
 	assert(handle);
 	assert(iface_no);
-	
+
 	async_exch_t *exch = async_exchange_begin(sess);
 	if (!exch)
 		return EPARTY;
-	
+
 	int ret = usb_get_my_device_handle(exch, handle);
 	if (ret == EOK) {
@@ -475,5 +475,5 @@
 		}
 	}
-	
+
 	async_exchange_end(exch);
 	return ret;
@@ -504,5 +504,5 @@
 		return ENOMEM;
 	}
-	
+
 	return usb_device_init(usb_dev, ddf_dev, desc, err, h, iface_no);
 }
Index: uspace/lib/usbdev/src/devpoll.c
===================================================================
--- uspace/lib/usbdev/src/devpoll.c	(revision 20eaa82bcd1e1ed452c2148cd68afde550e29457)
+++ uspace/lib/usbdev/src/devpoll.c	(revision b7db0091d48cc520f1e342189ef375e6989ea358)
@@ -96,5 +96,5 @@
 		    (int) mapping->interface->interface_subclass,
 		    (int) mapping->interface->interface_protocol,
-		    data->request_size, pipe->max_packet_size);
+		    data->request_size, pipe->desc.max_packet_size);
 	}
 
@@ -128,5 +128,5 @@
 			usb_request_clear_endpoint_halt(
 			    usb_device_get_default_pipe(data->dev),
-			    pipe->endpoint_no);
+			    pipe->desc.endpoint_no);
 		}
 
@@ -156,5 +156,5 @@
 
 		/* Take a rest before next request. */
-		
+
 		// FIXME TODO: This is broken, the time is in ms not us.
 		// but first we need to fix drivers to actually stop using this,
@@ -216,9 +216,9 @@
 	if (request_size == 0)
 		return EINVAL;
-	
-	if (!epm || (epm->pipe.transfer_type != USB_TRANSFER_INTERRUPT) ||
-	    (epm->pipe.direction != USB_DIRECTION_IN))
+
+	if (!epm || (epm->pipe.desc.transfer_type != USB_TRANSFER_INTERRUPT) ||
+	    (epm->pipe.desc.direction != USB_DIRECTION_IN))
 		return EINVAL;
-	
+
 
 	polling_data_t *polling_data = malloc(sizeof(polling_data_t));
Index: uspace/lib/usbdev/src/pipes.c
===================================================================
--- uspace/lib/usbdev/src/pipes.c	(revision 20eaa82bcd1e1ed452c2148cd68afde550e29457)
+++ uspace/lib/usbdev/src/pipes.c	(revision b7db0091d48cc520f1e342189ef375e6989ea358)
@@ -51,5 +51,5 @@
 	assert(pipe != NULL);
 
-	if (!pipe->auto_reset_halt || (pipe->endpoint_no != 0)) {
+	if (!pipe->auto_reset_halt || (pipe->desc.endpoint_no != 0)) {
 		return;
 	}
@@ -88,6 +88,6 @@
 	}
 
-	if ((pipe->direction != USB_DIRECTION_BOTH)
-	    || (pipe->transfer_type != USB_TRANSFER_CONTROL)) {
+	if ((pipe->desc.direction != USB_DIRECTION_BOTH)
+	    || (pipe->desc.transfer_type != USB_TRANSFER_CONTROL)) {
 		return EBADF;
 	}
@@ -98,5 +98,5 @@
 	async_exch_t *exch = async_exchange_begin(pipe->bus_session);
 	size_t act_size = 0;
-	const int rc = usb_read(exch, pipe->endpoint_no, setup_packet, buffer,
+	const int rc = usb_read(exch, pipe->desc.endpoint_no, setup_packet, buffer,
 	    buffer_size, &act_size);
 	async_exchange_end(exch);
@@ -142,6 +142,6 @@
 	}
 
-	if ((pipe->direction != USB_DIRECTION_BOTH)
-	    || (pipe->transfer_type != USB_TRANSFER_CONTROL)) {
+	if ((pipe->desc.direction != USB_DIRECTION_BOTH)
+	    || (pipe->desc.transfer_type != USB_TRANSFER_CONTROL)) {
 		return EBADF;
 	}
@@ -152,5 +152,5 @@
 	async_exch_t *exch = async_exchange_begin(pipe->bus_session);
 	const int rc = usb_write(exch,
-	    pipe->endpoint_no, setup_packet, buffer, buffer_size);
+	    pipe->desc.endpoint_no, setup_packet, buffer, buffer_size);
 	async_exchange_end(exch);
 
@@ -183,15 +183,15 @@
 	}
 
-	if (pipe->direction != USB_DIRECTION_IN) {
-		return EBADF;
-	}
-
-	if (pipe->transfer_type == USB_TRANSFER_CONTROL) {
+	if (pipe->desc.direction != USB_DIRECTION_IN) {
+		return EBADF;
+	}
+
+	if (pipe->desc.transfer_type == USB_TRANSFER_CONTROL) {
 		return EBADF;
 	}
 
 	/* Isochronous transfer are not supported (yet) */
-	if (pipe->transfer_type != USB_TRANSFER_INTERRUPT &&
-	    pipe->transfer_type != USB_TRANSFER_BULK)
+	if (pipe->desc.transfer_type != USB_TRANSFER_INTERRUPT &&
+	    pipe->desc.transfer_type != USB_TRANSFER_BULK)
 	    return ENOTSUP;
 
@@ -199,5 +199,5 @@
 	size_t act_size = 0;
 	const int rc =
-	    usb_read(exch, pipe->endpoint_no, 0, buffer, size, &act_size);
+	    usb_read(exch, pipe->desc.endpoint_no, 0, buffer, size, &act_size);
 	async_exchange_end(exch);
 
@@ -224,19 +224,19 @@
 	}
 
-	if (pipe->direction != USB_DIRECTION_OUT) {
-		return EBADF;
-	}
-
-	if (pipe->transfer_type == USB_TRANSFER_CONTROL) {
+	if (pipe->desc.direction != USB_DIRECTION_OUT) {
+		return EBADF;
+	}
+
+	if (pipe->desc.transfer_type == USB_TRANSFER_CONTROL) {
 		return EBADF;
 	}
 
 	/* Isochronous transfer are not supported (yet) */
-	if (pipe->transfer_type != USB_TRANSFER_INTERRUPT &&
-	    pipe->transfer_type != USB_TRANSFER_BULK)
+	if (pipe->desc.transfer_type != USB_TRANSFER_INTERRUPT &&
+	    pipe->desc.transfer_type != USB_TRANSFER_BULK)
 	    return ENOTSUP;
 
 	async_exch_t *exch = async_exchange_begin(pipe->bus_session);
-	const int rc = usb_write(exch, pipe->endpoint_no, 0, buffer, size);
+	const int rc = usb_write(exch, pipe->desc.endpoint_no, 0, buffer, size);
 	async_exchange_end(exch);
 	return rc;
@@ -258,9 +258,9 @@
 	assert(pipe);
 
-	pipe->endpoint_no = endpoint_no;
-	pipe->transfer_type = transfer_type;
-	pipe->packets = packets;
-	pipe->max_packet_size = max_packet_size;
-	pipe->direction = direction;
+	pipe->desc.endpoint_no = endpoint_no;
+	pipe->desc.transfer_type = transfer_type;
+	pipe->desc.packets = packets;
+	pipe->desc.max_packet_size = max_packet_size;
+	pipe->desc.direction = direction;
 	pipe->auto_reset_halt = false;
 	pipe->bus_session = bus_session;
@@ -297,10 +297,12 @@
 	assert(pipe);
 	assert(pipe->bus_session);
+
+	pipe->desc.usb2.polling_interval = interval;
 	async_exch_t *exch = async_exchange_begin(pipe->bus_session);
 	if (!exch)
 		return ENOMEM;
-	const int ret = usb_register_endpoint(exch, pipe->endpoint_no,
-	    pipe->transfer_type, pipe->direction, pipe->max_packet_size,
-	    pipe->packets, interval);
+
+	const int ret = usb_register_endpoint(exch, &pipe->desc);
+
 	async_exchange_end(exch);
 	return ret;
@@ -319,6 +321,7 @@
 	if (!exch)
 		return ENOMEM;
-	const int ret = usb_unregister_endpoint(exch, pipe->endpoint_no,
-	    pipe->direction);
+
+	const int ret = usb_unregister_endpoint(exch, &pipe->desc);
+
 	async_exchange_end(exch);
 	return ret;
Index: uspace/lib/usbdev/src/pipesinit.c
===================================================================
--- uspace/lib/usbdev/src/pipesinit.c	(revision 20eaa82bcd1e1ed452c2148cd68afde550e29457)
+++ uspace/lib/usbdev/src/pipesinit.c	(revision b7db0091d48cc520f1e342189ef375e6989ea358)
@@ -288,5 +288,5 @@
 	if (config_descriptor == NULL)
 		return EBADMEM;
-	
+
 	if (config_descriptor_size <
 	    sizeof(usb_standard_configuration_descriptor_t)) {
@@ -343,7 +343,7 @@
 	static_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)) {
+	if ((pipe->desc.direction != USB_DIRECTION_BOTH) ||
+	    (pipe->desc.transfer_type != USB_TRANSFER_CONTROL) ||
+	    (pipe->desc.endpoint_no != 0)) {
 		return EINVAL;
 	}
@@ -369,5 +369,5 @@
 	}
 
-	pipe->max_packet_size
+	pipe->desc.max_packet_size
 	    = dev_descr_start[DEV_DESCR_MAX_PACKET_SIZE_OFFSET];
 
Index: uspace/lib/usbdev/src/request.c
===================================================================
--- uspace/lib/usbdev/src/request.c	(revision 20eaa82bcd1e1ed452c2148cd68afde550e29457)
+++ uspace/lib/usbdev/src/request.c	(revision b7db0091d48cc520f1e342189ef375e6989ea358)
@@ -844,5 +844,5 @@
 	}
 	return usb_request_clear_endpoint_halt(ctrl_pipe,
-	    target_pipe->endpoint_no);
+	    target_pipe->desc.endpoint_no);
 }
 
@@ -858,5 +858,5 @@
 {
 	uint16_t status_tmp;
-	uint16_t pipe_index = (uint16_t) pipe->endpoint_no;
+	uint16_t pipe_index = (uint16_t) pipe->desc.endpoint_no;
 	int rc = usb_request_get_status(ctrl_pipe,
 	    USB_REQUEST_RECIPIENT_ENDPOINT, uint16_host2usb(pipe_index),
Index: uspace/lib/usbhost/src/ddf_helpers.c
===================================================================
--- uspace/lib/usbhost/src/ddf_helpers.c	(revision 20eaa82bcd1e1ed452c2148cd68afde550e29457)
+++ uspace/lib/usbhost/src/ddf_helpers.c	(revision b7db0091d48cc520f1e342189ef375e6989ea358)
@@ -86,16 +86,9 @@
 /** Register endpoint interface function.
  * @param fun DDF function.
- * @param address USB address of the device.
- * @param endpoint USB endpoint number to be registered.
- * @param transfer_type Endpoint's transfer type.
- * @param direction USB communication direction the endpoint is capable of.
- * @param max_packet_size Maximu size of packets the endpoint accepts.
- * @param interval Preferred timeout between communication.
+ * @param endpoint_desc Endpoint description.
  * @return Error code.
  */
 static int register_endpoint(
-    ddf_fun_t *fun, usb_endpoint_t endpoint,
-    usb_transfer_type_t transfer_type, usb_direction_t direction,
-    size_t max_packet_size, unsigned packets, unsigned interval)
+	ddf_fun_t *fun, usb_endpoint_desc_t *endpoint_desc)
 {
 	assert(fun);
@@ -105,23 +98,26 @@
 	assert(hcd->bus);
 	assert(dev);
-	const size_t size = max_packet_size;
+
+	const size_t size = endpoint_desc->max_packet_size;
 
 	usb_log_debug("Register endpoint %d:%d %s-%s %zuB %ums.\n",
-	    dev->address, endpoint, usb_str_transfer_type(transfer_type),
-	    usb_str_direction(direction), max_packet_size, interval);
-
-	return bus_add_ep(hcd->bus, dev, endpoint, direction, transfer_type,
-	    max_packet_size, packets, size);
-}
-
-/** Unregister endpoint interface function.
- * @param fun DDF function.
- * @param address USB address of the endpoint.
- * @param endpoint USB endpoint number.
- * @param direction Communication direction of the enpdoint to unregister.
- * @return Error code.
- */
+		dev->address, endpoint_desc->endpoint_no,
+		usb_str_transfer_type(endpoint_desc->transfer_type),
+		usb_str_direction(endpoint_desc->direction),
+		endpoint_desc->max_packet_size, endpoint_desc->usb2.polling_interval);
+
+	return bus_add_ep(hcd->bus, dev, endpoint_desc->endpoint_no,
+		endpoint_desc->direction, endpoint_desc->transfer_type,
+		endpoint_desc->max_packet_size, endpoint_desc->packets,
+		size);
+}
+
+ /** Unregister endpoint interface function.
+  * @param fun DDF function.
+  * @param endpoint_desc Endpoint description.
+  * @return Error code.
+  */
 static int unregister_endpoint(
-    ddf_fun_t *fun, usb_endpoint_t endpoint, usb_direction_t direction)
+	ddf_fun_t *fun, usb_endpoint_desc_t *endpoint_desc)
 {
 	assert(fun);
@@ -131,11 +127,14 @@
 	assert(hcd->bus);
 	assert(dev);
+
 	const usb_target_t target = {{
 		.address = dev->address,
-		.endpoint = endpoint
+		.endpoint = endpoint_desc->endpoint_no
 	}};
+
 	usb_log_debug("Unregister endpoint %d:%d %s.\n",
-	    dev->address, endpoint, usb_str_direction(direction));
-	return bus_remove_ep(hcd->bus, target, direction);
+		dev->address, endpoint_desc->endpoint_no,
+		usb_str_direction(endpoint_desc->direction));
+	return bus_remove_ep(hcd->bus, target, endpoint_desc->direction);
 }