1 /*
2 * Host Side support for RNDIS Networking Links
3 * Copyright (C) 2005 by David Brownell
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/netdevice.h>
22 #include <linux/etherdevice.h>
23 #include <linux/ethtool.h>
24 #include <linux/workqueue.h>
25 #include <linux/slab.h>
26 #include <linux/mii.h>
27 #include <linux/usb.h>
28 #include <linux/usb/cdc.h>
29 #include <linux/usb/usbnet.h>
30 #include <linux/usb/rndis_host.h>
31
32
33 /*
34 * RNDIS is NDIS remoted over USB. It's a MSFT variant of CDC ACM ... of
35 * course ACM was intended for modems, not Ethernet links! USB's standard
36 * for Ethernet links is "CDC Ethernet", which is significantly simpler.
37 *
38 * NOTE that Microsoft's "RNDIS 1.0" specification is incomplete. Issues
39 * include:
40 * - Power management in particular relies on information that's scattered
41 * through other documentation, and which is incomplete or incorrect even
42 * there.
43 * - There are various undocumented protocol requirements, such as the
44 * need to send unused garbage in control-OUT messages.
45 * - In some cases, MS-Windows will emit undocumented requests; this
46 * matters more to peripheral implementations than host ones.
47 *
48 * Moreover there's a no-open-specs variant of RNDIS called "ActiveSync".
49 *
50 * For these reasons and others, ** USE OF RNDIS IS STRONGLY DISCOURAGED ** in
51 * favor of such non-proprietary alternatives as CDC Ethernet or the newer (and
52 * currently rare) "Ethernet Emulation Model" (EEM).
53 */
54
55 /*
56 * RNDIS notifications from device: command completion; "reverse"
57 * keepalives; etc
58 */
rndis_status(struct usbnet * dev,struct urb * urb)59 void rndis_status(struct usbnet *dev, struct urb *urb)
60 {
61 netdev_dbg(dev->net, "rndis status urb, len %d stat %d\n",
62 urb->actual_length, urb->status);
63 // FIXME for keepalives, respond immediately (asynchronously)
64 // if not an RNDIS status, do like cdc_status(dev,urb) does
65 }
66 EXPORT_SYMBOL_GPL(rndis_status);
67
68 /*
69 * RNDIS indicate messages.
70 */
rndis_msg_indicate(struct usbnet * dev,struct rndis_indicate * msg,int buflen)71 static void rndis_msg_indicate(struct usbnet *dev, struct rndis_indicate *msg,
72 int buflen)
73 {
74 struct cdc_state *info = (void *)&dev->data;
75 struct device *udev = &info->control->dev;
76
77 if (dev->driver_info->indication) {
78 dev->driver_info->indication(dev, msg, buflen);
79 } else {
80 switch (msg->status) {
81 case RNDIS_STATUS_MEDIA_CONNECT:
82 dev_info(udev, "rndis media connect\n");
83 break;
84 case RNDIS_STATUS_MEDIA_DISCONNECT:
85 dev_info(udev, "rndis media disconnect\n");
86 break;
87 default:
88 dev_info(udev, "rndis indication: 0x%08x\n",
89 le32_to_cpu(msg->status));
90 }
91 }
92 }
93
94 /*
95 * RPC done RNDIS-style. Caller guarantees:
96 * - message is properly byteswapped
97 * - there's no other request pending
98 * - buf can hold up to 1KB response (required by RNDIS spec)
99 * On return, the first few entries are already byteswapped.
100 *
101 * Call context is likely probe(), before interface name is known,
102 * which is why we won't try to use it in the diagnostics.
103 */
rndis_command(struct usbnet * dev,struct rndis_msg_hdr * buf,int buflen)104 int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf, int buflen)
105 {
106 struct cdc_state *info = (void *) &dev->data;
107 int master_ifnum;
108 int retval;
109 unsigned count;
110 __le32 rsp;
111 u32 xid = 0, msg_len, request_id;
112
113 /* REVISIT when this gets called from contexts other than probe() or
114 * disconnect(): either serialize, or dispatch responses on xid
115 */
116
117 /* Issue the request; xid is unique, don't bother byteswapping it */
118 if (likely(buf->msg_type != RNDIS_MSG_HALT &&
119 buf->msg_type != RNDIS_MSG_RESET)) {
120 xid = dev->xid++;
121 if (!xid)
122 xid = dev->xid++;
123 buf->request_id = (__force __le32) xid;
124 }
125 master_ifnum = info->control->cur_altsetting->desc.bInterfaceNumber;
126 retval = usb_control_msg(dev->udev,
127 usb_sndctrlpipe(dev->udev, 0),
128 USB_CDC_SEND_ENCAPSULATED_COMMAND,
129 USB_TYPE_CLASS | USB_RECIP_INTERFACE,
130 0, master_ifnum,
131 buf, le32_to_cpu(buf->msg_len),
132 RNDIS_CONTROL_TIMEOUT_MS);
133 if (unlikely(retval < 0 || xid == 0))
134 return retval;
135
136 // FIXME Seems like some devices discard responses when
137 // we time out and cancel our "get response" requests...
138 // so, this is fragile. Probably need to poll for status.
139
140 /* ignore status endpoint, just poll the control channel;
141 * the request probably completed immediately
142 */
143 rsp = buf->msg_type | RNDIS_MSG_COMPLETION;
144 for (count = 0; count < 10; count++) {
145 memset(buf, 0, CONTROL_BUFFER_SIZE);
146 retval = usb_control_msg(dev->udev,
147 usb_rcvctrlpipe(dev->udev, 0),
148 USB_CDC_GET_ENCAPSULATED_RESPONSE,
149 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
150 0, master_ifnum,
151 buf, buflen,
152 RNDIS_CONTROL_TIMEOUT_MS);
153 if (likely(retval >= 8)) {
154 msg_len = le32_to_cpu(buf->msg_len);
155 request_id = (__force u32) buf->request_id;
156 if (likely(buf->msg_type == rsp)) {
157 if (likely(request_id == xid)) {
158 if (unlikely(rsp == RNDIS_MSG_RESET_C))
159 return 0;
160 if (likely(RNDIS_STATUS_SUCCESS
161 == buf->status))
162 return 0;
163 dev_dbg(&info->control->dev,
164 "rndis reply status %08x\n",
165 le32_to_cpu(buf->status));
166 return -EL3RST;
167 }
168 dev_dbg(&info->control->dev,
169 "rndis reply id %d expected %d\n",
170 request_id, xid);
171 /* then likely retry */
172 } else switch (buf->msg_type) {
173 case RNDIS_MSG_INDICATE: /* fault/event */
174 rndis_msg_indicate(dev, (void *)buf, buflen);
175
176 break;
177 case RNDIS_MSG_KEEPALIVE: { /* ping */
178 struct rndis_keepalive_c *msg = (void *)buf;
179
180 msg->msg_type = RNDIS_MSG_KEEPALIVE_C;
181 msg->msg_len = cpu_to_le32(sizeof *msg);
182 msg->status = RNDIS_STATUS_SUCCESS;
183 retval = usb_control_msg(dev->udev,
184 usb_sndctrlpipe(dev->udev, 0),
185 USB_CDC_SEND_ENCAPSULATED_COMMAND,
186 USB_TYPE_CLASS | USB_RECIP_INTERFACE,
187 0, master_ifnum,
188 msg, sizeof *msg,
189 RNDIS_CONTROL_TIMEOUT_MS);
190 if (unlikely(retval < 0))
191 dev_dbg(&info->control->dev,
192 "rndis keepalive err %d\n",
193 retval);
194 }
195 break;
196 default:
197 dev_dbg(&info->control->dev,
198 "unexpected rndis msg %08x len %d\n",
199 le32_to_cpu(buf->msg_type), msg_len);
200 }
201 } else {
202 /* device probably issued a protocol stall; ignore */
203 dev_dbg(&info->control->dev,
204 "rndis response error, code %d\n", retval);
205 }
206 msleep(20);
207 }
208 dev_dbg(&info->control->dev, "rndis response timeout\n");
209 return -ETIMEDOUT;
210 }
211 EXPORT_SYMBOL_GPL(rndis_command);
212
213 /*
214 * rndis_query:
215 *
216 * Performs a query for @oid along with 0 or more bytes of payload as
217 * specified by @in_len. If @reply_len is not set to -1 then the reply
218 * length is checked against this value, resulting in an error if it
219 * doesn't match.
220 *
221 * NOTE: Adding a payload exactly or greater than the size of the expected
222 * response payload is an evident requirement MSFT added for ActiveSync.
223 *
224 * The only exception is for OIDs that return a variably sized response,
225 * in which case no payload should be added. This undocumented (and
226 * nonsensical!) issue was found by sniffing protocol requests from the
227 * ActiveSync 4.1 Windows driver.
228 */
rndis_query(struct usbnet * dev,struct usb_interface * intf,void * buf,__le32 oid,u32 in_len,void ** reply,int * reply_len)229 static int rndis_query(struct usbnet *dev, struct usb_interface *intf,
230 void *buf, __le32 oid, u32 in_len,
231 void **reply, int *reply_len)
232 {
233 int retval;
234 union {
235 void *buf;
236 struct rndis_msg_hdr *header;
237 struct rndis_query *get;
238 struct rndis_query_c *get_c;
239 } u;
240 u32 off, len;
241
242 u.buf = buf;
243
244 memset(u.get, 0, sizeof *u.get + in_len);
245 u.get->msg_type = RNDIS_MSG_QUERY;
246 u.get->msg_len = cpu_to_le32(sizeof *u.get + in_len);
247 u.get->oid = oid;
248 u.get->len = cpu_to_le32(in_len);
249 u.get->offset = cpu_to_le32(20);
250
251 retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE);
252 if (unlikely(retval < 0)) {
253 dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) failed, %d\n",
254 oid, retval);
255 return retval;
256 }
257
258 off = le32_to_cpu(u.get_c->offset);
259 len = le32_to_cpu(u.get_c->len);
260 if (unlikely((8 + off + len) > CONTROL_BUFFER_SIZE))
261 goto response_error;
262
263 if (*reply_len != -1 && len != *reply_len)
264 goto response_error;
265
266 *reply = (unsigned char *) &u.get_c->request_id + off;
267 *reply_len = len;
268
269 return retval;
270
271 response_error:
272 dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) "
273 "invalid response - off %d len %d\n",
274 oid, off, len);
275 return -EDOM;
276 }
277
278 /* same as usbnet_netdev_ops but MTU change not allowed */
279 static const struct net_device_ops rndis_netdev_ops = {
280 .ndo_open = usbnet_open,
281 .ndo_stop = usbnet_stop,
282 .ndo_start_xmit = usbnet_start_xmit,
283 .ndo_tx_timeout = usbnet_tx_timeout,
284 .ndo_set_mac_address = eth_mac_addr,
285 .ndo_validate_addr = eth_validate_addr,
286 };
287
288 int
generic_rndis_bind(struct usbnet * dev,struct usb_interface * intf,int flags)289 generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
290 {
291 int retval;
292 struct net_device *net = dev->net;
293 struct cdc_state *info = (void *) &dev->data;
294 union {
295 void *buf;
296 struct rndis_msg_hdr *header;
297 struct rndis_init *init;
298 struct rndis_init_c *init_c;
299 struct rndis_query *get;
300 struct rndis_query_c *get_c;
301 struct rndis_set *set;
302 struct rndis_set_c *set_c;
303 struct rndis_halt *halt;
304 } u;
305 u32 tmp;
306 __le32 phym_unspec, *phym;
307 int reply_len;
308 unsigned char *bp;
309
310 /* we can't rely on i/o from stack working, or stack allocation */
311 u.buf = kmalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL);
312 if (!u.buf)
313 return -ENOMEM;
314 retval = usbnet_generic_cdc_bind(dev, intf);
315 if (retval < 0)
316 goto fail;
317
318 u.init->msg_type = RNDIS_MSG_INIT;
319 u.init->msg_len = cpu_to_le32(sizeof *u.init);
320 u.init->major_version = cpu_to_le32(1);
321 u.init->minor_version = cpu_to_le32(0);
322
323 /* max transfer (in spec) is 0x4000 at full speed, but for
324 * TX we'll stick to one Ethernet packet plus RNDIS framing.
325 * For RX we handle drivers that zero-pad to end-of-packet.
326 * Don't let userspace change these settings.
327 *
328 * NOTE: there still seems to be wierdness here, as if we need
329 * to do some more things to make sure WinCE targets accept this.
330 * They default to jumbograms of 8KB or 16KB, which is absurd
331 * for such low data rates and which is also more than Linux
332 * can usually expect to allocate for SKB data...
333 */
334 net->hard_header_len += sizeof (struct rndis_data_hdr);
335 dev->hard_mtu = net->mtu + net->hard_header_len;
336
337 dev->maxpacket = usb_maxpacket(dev->udev, dev->out, 1);
338 if (dev->maxpacket == 0) {
339 netif_dbg(dev, probe, dev->net,
340 "dev->maxpacket can't be 0\n");
341 retval = -EINVAL;
342 goto fail_and_release;
343 }
344
345 dev->rx_urb_size = dev->hard_mtu + (dev->maxpacket + 1);
346 dev->rx_urb_size &= ~(dev->maxpacket - 1);
347 u.init->max_transfer_size = cpu_to_le32(dev->rx_urb_size);
348
349 net->netdev_ops = &rndis_netdev_ops;
350
351 retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE);
352 if (unlikely(retval < 0)) {
353 /* it might not even be an RNDIS device!! */
354 dev_err(&intf->dev, "RNDIS init failed, %d\n", retval);
355 goto fail_and_release;
356 }
357 tmp = le32_to_cpu(u.init_c->max_transfer_size);
358 if (tmp < dev->hard_mtu) {
359 if (tmp <= net->hard_header_len) {
360 dev_err(&intf->dev,
361 "dev can't take %u byte packets (max %u)\n",
362 dev->hard_mtu, tmp);
363 retval = -EINVAL;
364 goto halt_fail_and_release;
365 }
366 dev_warn(&intf->dev,
367 "dev can't take %u byte packets (max %u), "
368 "adjusting MTU to %u\n",
369 dev->hard_mtu, tmp, tmp - net->hard_header_len);
370 dev->hard_mtu = tmp;
371 net->mtu = dev->hard_mtu - net->hard_header_len;
372 }
373
374 /* REVISIT: peripheral "alignment" request is ignored ... */
375 dev_dbg(&intf->dev,
376 "hard mtu %u (%u from dev), rx buflen %Zu, align %d\n",
377 dev->hard_mtu, tmp, dev->rx_urb_size,
378 1 << le32_to_cpu(u.init_c->packet_alignment));
379
380 /* module has some device initialization code needs to be done right
381 * after RNDIS_INIT */
382 if (dev->driver_info->early_init &&
383 dev->driver_info->early_init(dev) != 0)
384 goto halt_fail_and_release;
385
386 /* Check physical medium */
387 phym = NULL;
388 reply_len = sizeof *phym;
389 retval = rndis_query(dev, intf, u.buf, OID_GEN_PHYSICAL_MEDIUM,
390 0, (void **) &phym, &reply_len);
391 if (retval != 0 || !phym) {
392 /* OID is optional so don't fail here. */
393 phym_unspec = RNDIS_PHYSICAL_MEDIUM_UNSPECIFIED;
394 phym = &phym_unspec;
395 }
396 if ((flags & FLAG_RNDIS_PHYM_WIRELESS) &&
397 *phym != RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) {
398 netif_dbg(dev, probe, dev->net,
399 "driver requires wireless physical medium, but device is not\n");
400 retval = -ENODEV;
401 goto halt_fail_and_release;
402 }
403 if ((flags & FLAG_RNDIS_PHYM_NOT_WIRELESS) &&
404 *phym == RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) {
405 netif_dbg(dev, probe, dev->net,
406 "driver requires non-wireless physical medium, but device is wireless.\n");
407 retval = -ENODEV;
408 goto halt_fail_and_release;
409 }
410
411 /* Get designated host ethernet address */
412 reply_len = ETH_ALEN;
413 retval = rndis_query(dev, intf, u.buf, OID_802_3_PERMANENT_ADDRESS,
414 48, (void **) &bp, &reply_len);
415 if (unlikely(retval< 0)) {
416 dev_err(&intf->dev, "rndis get ethaddr, %d\n", retval);
417 goto halt_fail_and_release;
418 }
419 memcpy(net->dev_addr, bp, ETH_ALEN);
420 memcpy(net->perm_addr, bp, ETH_ALEN);
421
422 /* set a nonzero filter to enable data transfers */
423 memset(u.set, 0, sizeof *u.set);
424 u.set->msg_type = RNDIS_MSG_SET;
425 u.set->msg_len = cpu_to_le32(4 + sizeof *u.set);
426 u.set->oid = OID_GEN_CURRENT_PACKET_FILTER;
427 u.set->len = cpu_to_le32(4);
428 u.set->offset = cpu_to_le32((sizeof *u.set) - 8);
429 *(__le32 *)(u.buf + sizeof *u.set) = RNDIS_DEFAULT_FILTER;
430
431 retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE);
432 if (unlikely(retval < 0)) {
433 dev_err(&intf->dev, "rndis set packet filter, %d\n", retval);
434 goto halt_fail_and_release;
435 }
436
437 retval = 0;
438
439 kfree(u.buf);
440 return retval;
441
442 halt_fail_and_release:
443 memset(u.halt, 0, sizeof *u.halt);
444 u.halt->msg_type = RNDIS_MSG_HALT;
445 u.halt->msg_len = cpu_to_le32(sizeof *u.halt);
446 (void) rndis_command(dev, (void *)u.halt, CONTROL_BUFFER_SIZE);
447 fail_and_release:
448 usb_set_intfdata(info->data, NULL);
449 usb_driver_release_interface(driver_of(intf), info->data);
450 info->data = NULL;
451 fail:
452 kfree(u.buf);
453 return retval;
454 }
455 EXPORT_SYMBOL_GPL(generic_rndis_bind);
456
rndis_bind(struct usbnet * dev,struct usb_interface * intf)457 static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
458 {
459 return generic_rndis_bind(dev, intf, FLAG_RNDIS_PHYM_NOT_WIRELESS);
460 }
461
rndis_unbind(struct usbnet * dev,struct usb_interface * intf)462 void rndis_unbind(struct usbnet *dev, struct usb_interface *intf)
463 {
464 struct rndis_halt *halt;
465
466 /* try to clear any rndis state/activity (no i/o from stack!) */
467 halt = kzalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL);
468 if (halt) {
469 halt->msg_type = RNDIS_MSG_HALT;
470 halt->msg_len = cpu_to_le32(sizeof *halt);
471 (void) rndis_command(dev, (void *)halt, CONTROL_BUFFER_SIZE);
472 kfree(halt);
473 }
474
475 usbnet_cdc_unbind(dev, intf);
476 }
477 EXPORT_SYMBOL_GPL(rndis_unbind);
478
479 /*
480 * DATA -- host must not write zlps
481 */
rndis_rx_fixup(struct usbnet * dev,struct sk_buff * skb)482 int rndis_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
483 {
484 /* peripheral may have batched packets to us... */
485 while (likely(skb->len)) {
486 struct rndis_data_hdr *hdr = (void *)skb->data;
487 struct sk_buff *skb2;
488 u32 msg_len, data_offset, data_len;
489
490 msg_len = le32_to_cpu(hdr->msg_len);
491 data_offset = le32_to_cpu(hdr->data_offset);
492 data_len = le32_to_cpu(hdr->data_len);
493
494 /* don't choke if we see oob, per-packet data, etc */
495 if (unlikely(hdr->msg_type != RNDIS_MSG_PACKET ||
496 skb->len < msg_len ||
497 (data_offset + data_len + 8) > msg_len)) {
498 dev->net->stats.rx_frame_errors++;
499 netdev_dbg(dev->net, "bad rndis message %d/%d/%d/%d, len %d\n",
500 le32_to_cpu(hdr->msg_type),
501 msg_len, data_offset, data_len, skb->len);
502 return 0;
503 }
504 skb_pull(skb, 8 + data_offset);
505
506 /* at most one packet left? */
507 if (likely((data_len - skb->len) <= sizeof *hdr)) {
508 skb_trim(skb, data_len);
509 break;
510 }
511
512 /* try to return all the packets in the batch */
513 skb2 = skb_clone(skb, GFP_ATOMIC);
514 if (unlikely(!skb2))
515 break;
516 skb_pull(skb, msg_len - sizeof *hdr);
517 skb_trim(skb2, data_len);
518 usbnet_skb_return(dev, skb2);
519 }
520
521 /* caller will usbnet_skb_return the remaining packet */
522 return 1;
523 }
524 EXPORT_SYMBOL_GPL(rndis_rx_fixup);
525
526 struct sk_buff *
rndis_tx_fixup(struct usbnet * dev,struct sk_buff * skb,gfp_t flags)527 rndis_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
528 {
529 struct rndis_data_hdr *hdr;
530 struct sk_buff *skb2;
531 unsigned len = skb->len;
532
533 if (likely(!skb_cloned(skb))) {
534 int room = skb_headroom(skb);
535
536 /* enough head room as-is? */
537 if (unlikely((sizeof *hdr) <= room))
538 goto fill;
539
540 /* enough room, but needs to be readjusted? */
541 room += skb_tailroom(skb);
542 if (likely((sizeof *hdr) <= room)) {
543 skb->data = memmove(skb->head + sizeof *hdr,
544 skb->data, len);
545 skb_set_tail_pointer(skb, len);
546 goto fill;
547 }
548 }
549
550 /* create a new skb, with the correct size (and tailpad) */
551 skb2 = skb_copy_expand(skb, sizeof *hdr, 1, flags);
552 dev_kfree_skb_any(skb);
553 if (unlikely(!skb2))
554 return skb2;
555 skb = skb2;
556
557 /* fill out the RNDIS header. we won't bother trying to batch
558 * packets; Linux minimizes wasted bandwidth through tx queues.
559 */
560 fill:
561 hdr = (void *) __skb_push(skb, sizeof *hdr);
562 memset(hdr, 0, sizeof *hdr);
563 hdr->msg_type = RNDIS_MSG_PACKET;
564 hdr->msg_len = cpu_to_le32(skb->len);
565 hdr->data_offset = cpu_to_le32(sizeof(*hdr) - 8);
566 hdr->data_len = cpu_to_le32(len);
567
568 /* FIXME make the last packet always be short ... */
569 return skb;
570 }
571 EXPORT_SYMBOL_GPL(rndis_tx_fixup);
572
573
574 static const struct driver_info rndis_info = {
575 .description = "RNDIS device",
576 .flags = FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT,
577 .bind = rndis_bind,
578 .unbind = rndis_unbind,
579 .status = rndis_status,
580 .rx_fixup = rndis_rx_fixup,
581 .tx_fixup = rndis_tx_fixup,
582 };
583
584 /*-------------------------------------------------------------------------*/
585
586 static const struct usb_device_id products [] = {
587 {
588 /* RNDIS is MSFT's un-official variant of CDC ACM */
589 USB_INTERFACE_INFO(USB_CLASS_COMM, 2 /* ACM */, 0x0ff),
590 .driver_info = (unsigned long) &rndis_info,
591 }, {
592 /* "ActiveSync" is an undocumented variant of RNDIS, used in WM5 */
593 USB_INTERFACE_INFO(USB_CLASS_MISC, 1, 1),
594 .driver_info = (unsigned long) &rndis_info,
595 }, {
596 /* RNDIS for tethering */
597 USB_INTERFACE_INFO(USB_CLASS_WIRELESS_CONTROLLER, 1, 3),
598 .driver_info = (unsigned long) &rndis_info,
599 },
600 { }, // END
601 };
602 MODULE_DEVICE_TABLE(usb, products);
603
604 static struct usb_driver rndis_driver = {
605 .name = "rndis_host",
606 .id_table = products,
607 .probe = usbnet_probe,
608 .disconnect = usbnet_disconnect,
609 .suspend = usbnet_suspend,
610 .resume = usbnet_resume,
611 };
612
rndis_init(void)613 static int __init rndis_init(void)
614 {
615 return usb_register(&rndis_driver);
616 }
617 module_init(rndis_init);
618
rndis_exit(void)619 static void __exit rndis_exit(void)
620 {
621 usb_deregister(&rndis_driver);
622 }
623 module_exit(rndis_exit);
624
625 MODULE_AUTHOR("David Brownell");
626 MODULE_DESCRIPTION("USB Host side RNDIS driver");
627 MODULE_LICENSE("GPL");
628