2 * Copyright (C) 2014 Michael Brown <mbrown@fensystems.co.uk>.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 * You can also choose to distribute this program under the terms of
20 * the Unmodified Binary Distribution Licence (as given in the file
21 * COPYING.UBDL), provided that you have satisfied its requirements.
24 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
28 #include <ipxe/netdevice.h>
29 #include <ipxe/ethernet.h>
30 #include <ipxe/if_ether.h>
31 #include <ipxe/base16.h>
32 #include <ipxe/profile.h>
38 * CDC-ECM USB Ethernet driver
42 /** Interrupt completion profiler */
43 static struct profiler ecm_intr_profiler __profiler =
44 { .name = "ecm.intr" };
46 /** Bulk IN completion profiler */
47 static struct profiler ecm_in_profiler __profiler =
50 /** Bulk OUT profiler */
51 static struct profiler ecm_out_profiler __profiler =
52 { .name = "ecm.out" };
54 /******************************************************************************
56 * Ethernet functional descriptor
58 ******************************************************************************
62 * Locate Ethernet functional descriptor
64 * @v config Configuration descriptor
65 * @v interface Interface descriptor
66 * @ret desc Descriptor, or NULL if not found
68 struct ecm_ethernet_descriptor *
69 ecm_ethernet_descriptor ( struct usb_configuration_descriptor *config,
70 struct usb_interface_descriptor *interface ) {
71 struct ecm_ethernet_descriptor *desc;
73 for_each_interface_descriptor ( desc, config, interface ) {
74 if ( ( desc->header.type == USB_CS_INTERFACE_DESCRIPTOR ) &&
75 ( desc->subtype == CDC_SUBTYPE_ETHERNET ) )
82 * Get hardware MAC address
85 * @v desc Ethernet functional descriptor
86 * @v hw_addr Hardware address to fill in
87 * @ret rc Return status code
89 int ecm_fetch_mac ( struct usb_device *usb,
90 struct ecm_ethernet_descriptor *desc, uint8_t *hw_addr ) {
91 char buf[ base16_encoded_len ( ETH_ALEN ) + 1 /* NUL */ ];
95 /* Fetch MAC address string */
96 len = usb_get_string_descriptor ( usb, desc->mac, 0, buf,
104 if ( len != ( ( int ) ( sizeof ( buf ) - 1 /* NUL */ ) ) )
107 /* Decode MAC address */
108 len = base16_decode ( buf, hw_addr, ETH_ALEN );
117 /******************************************************************************
119 * CDC-ECM communications interface
121 ******************************************************************************
125 * Complete interrupt transfer
128 * @v iobuf I/O buffer
129 * @v rc Completion status code
131 static void ecm_intr_complete ( struct usb_endpoint *ep,
132 struct io_buffer *iobuf, int rc ) {
133 struct ecm_device *ecm = container_of ( ep, struct ecm_device,
135 struct net_device *netdev = ecm->netdev;
136 struct usb_setup_packet *message;
137 size_t len = iob_len ( iobuf );
139 /* Profile completions */
140 profile_start ( &ecm_intr_profiler );
142 /* Ignore packets cancelled when the endpoint closes */
146 /* Drop packets with errors */
148 DBGC ( ecm, "ECM %p interrupt failed: %s\n",
149 ecm, strerror ( rc ) );
150 DBGC_HDA ( ecm, 0, iobuf->data, iob_len ( iobuf ) );
154 /* Extract message header */
155 if ( len < sizeof ( *message ) ) {
156 DBGC ( ecm, "ECM %p underlength interrupt:\n", ecm );
157 DBGC_HDA ( ecm, 0, iobuf->data, iob_len ( iobuf ) );
161 message = iobuf->data;
163 /* Parse message header */
164 switch ( message->request ) {
166 case cpu_to_le16 ( CDC_NETWORK_CONNECTION ) :
167 if ( message->value && ! netdev_link_ok ( netdev ) ) {
168 DBGC ( ecm, "ECM %p link up\n", ecm );
169 netdev_link_up ( netdev );
170 } else if ( netdev_link_ok ( netdev ) && ! message->value ) {
171 DBGC ( ecm, "ECM %p link down\n", ecm );
172 netdev_link_down ( netdev );
176 case cpu_to_le16 ( CDC_CONNECTION_SPEED_CHANGE ) :
181 DBGC ( ecm, "ECM %p unrecognised interrupt:\n", ecm );
182 DBGC_HDA ( ecm, 0, iobuf->data, iob_len ( iobuf ) );
187 /* Free I/O buffer */
189 profile_stop ( &ecm_intr_profiler );
194 netdev_rx_err ( netdev, iob_disown ( iobuf ), rc );
200 /** Interrupt endpoint operations */
201 static struct usb_endpoint_driver_operations ecm_intr_operations = {
202 .complete = ecm_intr_complete,
205 /******************************************************************************
207 * CDC-ECM data interface
209 ******************************************************************************
213 * Complete bulk IN transfer
216 * @v iobuf I/O buffer
217 * @v rc Completion status code
219 static void ecm_in_complete ( struct usb_endpoint *ep, struct io_buffer *iobuf,
221 struct ecm_device *ecm = container_of ( ep, struct ecm_device,
223 struct net_device *netdev = ecm->netdev;
225 /* Profile receive completions */
226 profile_start ( &ecm_in_profiler );
228 /* Ignore packets cancelled when the endpoint closes */
232 /* Record USB errors against the network device */
234 DBGC ( ecm, "ECM %p bulk IN failed: %s\n",
235 ecm, strerror ( rc ) );
239 /* Hand off to network stack */
240 netdev_rx ( netdev, iob_disown ( iobuf ) );
242 profile_stop ( &ecm_in_profiler );
246 netdev_rx_err ( netdev, iob_disown ( iobuf ), rc );
251 /** Bulk IN endpoint operations */
252 static struct usb_endpoint_driver_operations ecm_in_operations = {
253 .complete = ecm_in_complete,
259 * @v ecm CDC-ECM device
260 * @v iobuf I/O buffer
261 * @ret rc Return status code
263 static int ecm_out_transmit ( struct ecm_device *ecm,
264 struct io_buffer *iobuf ) {
267 /* Profile transmissions */
268 profile_start ( &ecm_out_profiler );
270 /* Enqueue I/O buffer */
271 if ( ( rc = usb_stream ( &ecm->usbnet.out, iobuf, 1 ) ) != 0 )
274 profile_stop ( &ecm_out_profiler );
279 * Complete bulk OUT transfer
282 * @v iobuf I/O buffer
283 * @v rc Completion status code
285 static void ecm_out_complete ( struct usb_endpoint *ep, struct io_buffer *iobuf,
287 struct ecm_device *ecm = container_of ( ep, struct ecm_device,
289 struct net_device *netdev = ecm->netdev;
291 /* Report TX completion */
292 netdev_tx_complete_err ( netdev, iobuf, rc );
295 /** Bulk OUT endpoint operations */
296 static struct usb_endpoint_driver_operations ecm_out_operations = {
297 .complete = ecm_out_complete,
300 /******************************************************************************
302 * Network device interface
304 ******************************************************************************
308 * Open network device
310 * @v netdev Network device
311 * @ret rc Return status code
313 static int ecm_open ( struct net_device *netdev ) {
314 struct ecm_device *ecm = netdev->priv;
315 struct usb_device *usb = ecm->usb;
319 /* Open USB network device */
320 if ( ( rc = usbnet_open ( &ecm->usbnet ) ) != 0 ) {
321 DBGC ( ecm, "ECM %p could not open: %s\n",
322 ecm, strerror ( rc ) );
326 /* Set packet filter */
327 filter = ( ECM_PACKET_TYPE_PROMISCUOUS |
328 ECM_PACKET_TYPE_ALL_MULTICAST |
329 ECM_PACKET_TYPE_DIRECTED |
330 ECM_PACKET_TYPE_BROADCAST );
331 if ( ( rc = usb_control ( usb, ECM_SET_ETHERNET_PACKET_FILTER,
332 filter, ecm->usbnet.comms, NULL, 0 ) ) != 0 ){
333 DBGC ( ecm, "ECM %p could not set packet filter: %s\n",
334 ecm, strerror ( rc ) );
341 usbnet_close ( &ecm->usbnet );
347 * Close network device
349 * @v netdev Network device
351 static void ecm_close ( struct net_device *netdev ) {
352 struct ecm_device *ecm = netdev->priv;
354 /* Close USB network device */
355 usbnet_close ( &ecm->usbnet );
361 * @v netdev Network device
362 * @v iobuf I/O buffer
363 * @ret rc Return status code
365 static int ecm_transmit ( struct net_device *netdev,
366 struct io_buffer *iobuf ) {
367 struct ecm_device *ecm = netdev->priv;
370 /* Transmit packet */
371 if ( ( rc = ecm_out_transmit ( ecm, iobuf ) ) != 0 )
378 * Poll for completed and received packets
380 * @v netdev Network device
382 static void ecm_poll ( struct net_device *netdev ) {
383 struct ecm_device *ecm = netdev->priv;
387 usb_poll ( ecm->bus );
389 /* Refill endpoints */
390 if ( ( rc = usbnet_refill ( &ecm->usbnet ) ) != 0 )
391 netdev_rx_err ( netdev, NULL, rc );
394 /** CDC-ECM network device operations */
395 static struct net_device_operations ecm_operations = {
398 .transmit = ecm_transmit,
402 /******************************************************************************
406 ******************************************************************************
412 * @v func USB function
413 * @v config Configuration descriptor
414 * @ret rc Return status code
416 static int ecm_probe ( struct usb_function *func,
417 struct usb_configuration_descriptor *config ) {
418 struct usb_device *usb = func->usb;
419 struct net_device *netdev;
420 struct ecm_device *ecm;
421 struct usb_interface_descriptor *comms;
422 struct ecm_ethernet_descriptor *ethernet;
425 /* Allocate and initialise structure */
426 netdev = alloc_etherdev ( sizeof ( *ecm ) );
431 netdev_init ( netdev, &ecm_operations );
432 netdev->dev = &func->dev;
434 memset ( ecm, 0, sizeof ( *ecm ) );
436 ecm->bus = usb->port->hub->bus;
437 ecm->netdev = netdev;
438 usbnet_init ( &ecm->usbnet, func, &ecm_intr_operations,
439 &ecm_in_operations, &ecm_out_operations );
440 usb_refill_init ( &ecm->usbnet.intr, 0, ECM_INTR_MAX_FILL );
441 usb_refill_init ( &ecm->usbnet.in, ECM_IN_MTU, ECM_IN_MAX_FILL );
442 DBGC ( ecm, "ECM %p on %s\n", ecm, func->name );
444 /* Describe USB network device */
445 if ( ( rc = usbnet_describe ( &ecm->usbnet, config ) ) != 0 ) {
446 DBGC ( ecm, "ECM %p could not describe: %s\n",
447 ecm, strerror ( rc ) );
451 /* Locate Ethernet descriptor */
452 comms = usb_interface_descriptor ( config, ecm->usbnet.comms, 0 );
453 assert ( comms != NULL );
454 ethernet = ecm_ethernet_descriptor ( config, comms );
456 DBGC ( ecm, "ECM %p has no Ethernet descriptor\n", ecm );
461 /* Fetch MAC address */
462 if ( ( rc = ecm_fetch_mac ( usb, ethernet, netdev->hw_addr ) ) != 0 ) {
463 DBGC ( ecm, "ECM %p could not fetch MAC address: %s\n",
464 ecm, strerror ( rc ) );
468 /* Register network device */
469 if ( ( rc = register_netdev ( netdev ) ) != 0 )
472 usb_func_set_drvdata ( func, ecm );
475 unregister_netdev ( netdev );
480 netdev_nullify ( netdev );
481 netdev_put ( netdev );
489 * @v func USB function
491 static void ecm_remove ( struct usb_function *func ) {
492 struct ecm_device *ecm = usb_func_get_drvdata ( func );
493 struct net_device *netdev = ecm->netdev;
495 unregister_netdev ( netdev );
496 netdev_nullify ( netdev );
497 netdev_put ( netdev );
500 /** CDC-ECM device IDs */
501 static struct usb_device_id ecm_ids[] = {
504 .vendor = USB_ANY_ID,
505 .product = USB_ANY_ID,
507 .class = USB_CLASS_CDC,
508 .subclass = USB_SUBCLASS_CDC_ECM,
514 /** CDC-ECM driver */
515 struct usb_driver ecm_driver __usb_driver = {
517 .id_count = ( sizeof ( ecm_ids ) / sizeof ( ecm_ids[0] ) ),
519 .remove = ecm_remove,