xref: /openbmc/linux/drivers/net/usb/cdc_ether.c (revision c819e2cf)
1 /*
2  * CDC Ethernet based networking peripherals
3  * Copyright (C) 2003-2005 by David Brownell
4  * Copyright (C) 2006 by Ole Andre Vadla Ravnas (ActiveSync)
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
18  */
19 
20 // #define	DEBUG			// error path messages, extra info
21 // #define	VERBOSE			// more; success messages
22 
23 #include <linux/module.h>
24 #include <linux/netdevice.h>
25 #include <linux/etherdevice.h>
26 #include <linux/ethtool.h>
27 #include <linux/workqueue.h>
28 #include <linux/mii.h>
29 #include <linux/usb.h>
30 #include <linux/usb/cdc.h>
31 #include <linux/usb/usbnet.h>
32 
33 
34 #if IS_ENABLED(CONFIG_USB_NET_RNDIS_HOST)
35 
36 static int is_rndis(struct usb_interface_descriptor *desc)
37 {
38 	return (desc->bInterfaceClass == USB_CLASS_COMM &&
39 		desc->bInterfaceSubClass == 2 &&
40 		desc->bInterfaceProtocol == 0xff);
41 }
42 
43 static int is_activesync(struct usb_interface_descriptor *desc)
44 {
45 	return (desc->bInterfaceClass == USB_CLASS_MISC &&
46 		desc->bInterfaceSubClass == 1 &&
47 		desc->bInterfaceProtocol == 1);
48 }
49 
50 static int is_wireless_rndis(struct usb_interface_descriptor *desc)
51 {
52 	return (desc->bInterfaceClass == USB_CLASS_WIRELESS_CONTROLLER &&
53 		desc->bInterfaceSubClass == 1 &&
54 		desc->bInterfaceProtocol == 3);
55 }
56 
57 #else
58 
59 #define is_rndis(desc)		0
60 #define is_activesync(desc)	0
61 #define is_wireless_rndis(desc)	0
62 
63 #endif
64 
65 static const u8 mbm_guid[16] = {
66 	0xa3, 0x17, 0xa8, 0x8b, 0x04, 0x5e, 0x4f, 0x01,
67 	0xa6, 0x07, 0xc0, 0xff, 0xcb, 0x7e, 0x39, 0x2a,
68 };
69 
70 static void usbnet_cdc_update_filter(struct usbnet *dev)
71 {
72 	struct cdc_state	*info = (void *) &dev->data;
73 	struct usb_interface	*intf = info->control;
74 	struct net_device	*net = dev->net;
75 
76 	u16 cdc_filter = USB_CDC_PACKET_TYPE_DIRECTED
77 			| USB_CDC_PACKET_TYPE_BROADCAST;
78 
79 	/* filtering on the device is an optional feature and not worth
80 	 * the hassle so we just roughly care about snooping and if any
81 	 * multicast is requested, we take every multicast
82 	 */
83 	if (net->flags & IFF_PROMISC)
84 		cdc_filter |= USB_CDC_PACKET_TYPE_PROMISCUOUS;
85 	if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI))
86 		cdc_filter |= USB_CDC_PACKET_TYPE_ALL_MULTICAST;
87 
88 	usb_control_msg(dev->udev,
89 			usb_sndctrlpipe(dev->udev, 0),
90 			USB_CDC_SET_ETHERNET_PACKET_FILTER,
91 			USB_TYPE_CLASS | USB_RECIP_INTERFACE,
92 			cdc_filter,
93 			intf->cur_altsetting->desc.bInterfaceNumber,
94 			NULL,
95 			0,
96 			USB_CTRL_SET_TIMEOUT
97 		);
98 }
99 
100 /* probes control interface, claims data interface, collects the bulk
101  * endpoints, activates data interface (if needed), maybe sets MTU.
102  * all pure cdc, except for certain firmware workarounds, and knowing
103  * that rndis uses one different rule.
104  */
105 int usbnet_generic_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
106 {
107 	u8				*buf = intf->cur_altsetting->extra;
108 	int				len = intf->cur_altsetting->extralen;
109 	struct usb_interface_descriptor	*d;
110 	struct cdc_state		*info = (void *) &dev->data;
111 	int				status;
112 	int				rndis;
113 	bool				android_rndis_quirk = false;
114 	struct usb_driver		*driver = driver_of(intf);
115 	struct usb_cdc_mdlm_desc	*desc = NULL;
116 	struct usb_cdc_mdlm_detail_desc *detail = NULL;
117 
118 	if (sizeof(dev->data) < sizeof(*info))
119 		return -EDOM;
120 
121 	/* expect strict spec conformance for the descriptors, but
122 	 * cope with firmware which stores them in the wrong place
123 	 */
124 	if (len == 0 && dev->udev->actconfig->extralen) {
125 		/* Motorola SB4100 (and others: Brad Hards says it's
126 		 * from a Broadcom design) put CDC descriptors here
127 		 */
128 		buf = dev->udev->actconfig->extra;
129 		len = dev->udev->actconfig->extralen;
130 		dev_dbg(&intf->dev, "CDC descriptors on config\n");
131 	}
132 
133 	/* Maybe CDC descriptors are after the endpoint?  This bug has
134 	 * been seen on some 2Wire Inc RNDIS-ish products.
135 	 */
136 	if (len == 0) {
137 		struct usb_host_endpoint	*hep;
138 
139 		hep = intf->cur_altsetting->endpoint;
140 		if (hep) {
141 			buf = hep->extra;
142 			len = hep->extralen;
143 		}
144 		if (len)
145 			dev_dbg(&intf->dev,
146 				"CDC descriptors on endpoint\n");
147 	}
148 
149 	/* this assumes that if there's a non-RNDIS vendor variant
150 	 * of cdc-acm, it'll fail RNDIS requests cleanly.
151 	 */
152 	rndis = (is_rndis(&intf->cur_altsetting->desc) ||
153 		 is_activesync(&intf->cur_altsetting->desc) ||
154 		 is_wireless_rndis(&intf->cur_altsetting->desc));
155 
156 	memset(info, 0, sizeof(*info));
157 	info->control = intf;
158 	while (len > 3) {
159 		if (buf[1] != USB_DT_CS_INTERFACE)
160 			goto next_desc;
161 
162 		/* use bDescriptorSubType to identify the CDC descriptors.
163 		 * We expect devices with CDC header and union descriptors.
164 		 * For CDC Ethernet we need the ethernet descriptor.
165 		 * For RNDIS, ignore two (pointless) CDC modem descriptors
166 		 * in favor of a complicated OID-based RPC scheme doing what
167 		 * CDC Ethernet achieves with a simple descriptor.
168 		 */
169 		switch (buf[2]) {
170 		case USB_CDC_HEADER_TYPE:
171 			if (info->header) {
172 				dev_dbg(&intf->dev, "extra CDC header\n");
173 				goto bad_desc;
174 			}
175 			info->header = (void *) buf;
176 			if (info->header->bLength != sizeof(*info->header)) {
177 				dev_dbg(&intf->dev, "CDC header len %u\n",
178 					info->header->bLength);
179 				goto bad_desc;
180 			}
181 			break;
182 		case USB_CDC_ACM_TYPE:
183 			/* paranoia:  disambiguate a "real" vendor-specific
184 			 * modem interface from an RNDIS non-modem.
185 			 */
186 			if (rndis) {
187 				struct usb_cdc_acm_descriptor *acm;
188 
189 				acm = (void *) buf;
190 				if (acm->bmCapabilities) {
191 					dev_dbg(&intf->dev,
192 						"ACM capabilities %02x, "
193 						"not really RNDIS?\n",
194 						acm->bmCapabilities);
195 					goto bad_desc;
196 				}
197 			}
198 			break;
199 		case USB_CDC_UNION_TYPE:
200 			if (info->u) {
201 				dev_dbg(&intf->dev, "extra CDC union\n");
202 				goto bad_desc;
203 			}
204 			info->u = (void *) buf;
205 			if (info->u->bLength != sizeof(*info->u)) {
206 				dev_dbg(&intf->dev, "CDC union len %u\n",
207 					info->u->bLength);
208 				goto bad_desc;
209 			}
210 
211 			/* we need a master/control interface (what we're
212 			 * probed with) and a slave/data interface; union
213 			 * descriptors sort this all out.
214 			 */
215 			info->control = usb_ifnum_to_if(dev->udev,
216 						info->u->bMasterInterface0);
217 			info->data = usb_ifnum_to_if(dev->udev,
218 						info->u->bSlaveInterface0);
219 			if (!info->control || !info->data) {
220 				dev_dbg(&intf->dev,
221 					"master #%u/%p slave #%u/%p\n",
222 					info->u->bMasterInterface0,
223 					info->control,
224 					info->u->bSlaveInterface0,
225 					info->data);
226 				/* fall back to hard-wiring for RNDIS */
227 				if (rndis) {
228 					android_rndis_quirk = true;
229 					goto next_desc;
230 				}
231 				goto bad_desc;
232 			}
233 			if (info->control != intf) {
234 				dev_dbg(&intf->dev, "bogus CDC Union\n");
235 				/* Ambit USB Cable Modem (and maybe others)
236 				 * interchanges master and slave interface.
237 				 */
238 				if (info->data == intf) {
239 					info->data = info->control;
240 					info->control = intf;
241 				} else
242 					goto bad_desc;
243 			}
244 
245 			/* some devices merge these - skip class check */
246 			if (info->control == info->data)
247 				goto next_desc;
248 
249 			/* a data interface altsetting does the real i/o */
250 			d = &info->data->cur_altsetting->desc;
251 			if (d->bInterfaceClass != USB_CLASS_CDC_DATA) {
252 				dev_dbg(&intf->dev, "slave class %u\n",
253 					d->bInterfaceClass);
254 				goto bad_desc;
255 			}
256 			break;
257 		case USB_CDC_ETHERNET_TYPE:
258 			if (info->ether) {
259 				dev_dbg(&intf->dev, "extra CDC ether\n");
260 				goto bad_desc;
261 			}
262 			info->ether = (void *) buf;
263 			if (info->ether->bLength != sizeof(*info->ether)) {
264 				dev_dbg(&intf->dev, "CDC ether len %u\n",
265 					info->ether->bLength);
266 				goto bad_desc;
267 			}
268 			dev->hard_mtu = le16_to_cpu(
269 						info->ether->wMaxSegmentSize);
270 			/* because of Zaurus, we may be ignoring the host
271 			 * side link address we were given.
272 			 */
273 			break;
274 		case USB_CDC_MDLM_TYPE:
275 			if (desc) {
276 				dev_dbg(&intf->dev, "extra MDLM descriptor\n");
277 				goto bad_desc;
278 			}
279 
280 			desc = (void *)buf;
281 
282 			if (desc->bLength != sizeof(*desc))
283 				goto bad_desc;
284 
285 			if (memcmp(&desc->bGUID, mbm_guid, 16))
286 				goto bad_desc;
287 			break;
288 		case USB_CDC_MDLM_DETAIL_TYPE:
289 			if (detail) {
290 				dev_dbg(&intf->dev, "extra MDLM detail descriptor\n");
291 				goto bad_desc;
292 			}
293 
294 			detail = (void *)buf;
295 
296 			if (detail->bGuidDescriptorType == 0) {
297 				if (detail->bLength < (sizeof(*detail) + 1))
298 					goto bad_desc;
299 			} else
300 				goto bad_desc;
301 			break;
302 		}
303 next_desc:
304 		len -= buf[0];	/* bLength */
305 		buf += buf[0];
306 	}
307 
308 	/* Microsoft ActiveSync based and some regular RNDIS devices lack the
309 	 * CDC descriptors, so we'll hard-wire the interfaces and not check
310 	 * for descriptors.
311 	 *
312 	 * Some Android RNDIS devices have a CDC Union descriptor pointing
313 	 * to non-existing interfaces.  Ignore that and attempt the same
314 	 * hard-wired 0 and 1 interfaces.
315 	 */
316 	if (rndis && (!info->u || android_rndis_quirk)) {
317 		info->control = usb_ifnum_to_if(dev->udev, 0);
318 		info->data = usb_ifnum_to_if(dev->udev, 1);
319 		if (!info->control || !info->data || info->control != intf) {
320 			dev_dbg(&intf->dev,
321 				"rndis: master #0/%p slave #1/%p\n",
322 				info->control,
323 				info->data);
324 			goto bad_desc;
325 		}
326 
327 	} else if (!info->header || !info->u || (!rndis && !info->ether)) {
328 		dev_dbg(&intf->dev, "missing cdc %s%s%sdescriptor\n",
329 			info->header ? "" : "header ",
330 			info->u ? "" : "union ",
331 			info->ether ? "" : "ether ");
332 		goto bad_desc;
333 	}
334 
335 	/* claim data interface and set it up ... with side effects.
336 	 * network traffic can't flow until an altsetting is enabled.
337 	 */
338 	if (info->data != info->control) {
339 		status = usb_driver_claim_interface(driver, info->data, dev);
340 		if (status < 0)
341 			return status;
342 	}
343 	status = usbnet_get_endpoints(dev, info->data);
344 	if (status < 0) {
345 		/* ensure immediate exit from usbnet_disconnect */
346 		usb_set_intfdata(info->data, NULL);
347 		if (info->data != info->control)
348 			usb_driver_release_interface(driver, info->data);
349 		return status;
350 	}
351 
352 	/* status endpoint: optional for CDC Ethernet, not RNDIS (or ACM) */
353 	if (info->data != info->control)
354 		dev->status = NULL;
355 	if (info->control->cur_altsetting->desc.bNumEndpoints == 1) {
356 		struct usb_endpoint_descriptor	*desc;
357 
358 		dev->status = &info->control->cur_altsetting->endpoint [0];
359 		desc = &dev->status->desc;
360 		if (!usb_endpoint_is_int_in(desc) ||
361 		    (le16_to_cpu(desc->wMaxPacketSize)
362 		     < sizeof(struct usb_cdc_notification)) ||
363 		    !desc->bInterval) {
364 			dev_dbg(&intf->dev, "bad notification endpoint\n");
365 			dev->status = NULL;
366 		}
367 	}
368 	if (rndis && !dev->status) {
369 		dev_dbg(&intf->dev, "missing RNDIS status endpoint\n");
370 		usb_set_intfdata(info->data, NULL);
371 		usb_driver_release_interface(driver, info->data);
372 		return -ENODEV;
373 	}
374 
375 	/* Some devices don't initialise properly. In particular
376 	 * the packet filter is not reset. There are devices that
377 	 * don't do reset all the way. So the packet filter should
378 	 * be set to a sane initial value.
379 	 */
380 	usbnet_cdc_update_filter(dev);
381 
382 	return 0;
383 
384 bad_desc:
385 	dev_info(&dev->udev->dev, "bad CDC descriptors\n");
386 	return -ENODEV;
387 }
388 EXPORT_SYMBOL_GPL(usbnet_generic_cdc_bind);
389 
390 void usbnet_cdc_unbind(struct usbnet *dev, struct usb_interface *intf)
391 {
392 	struct cdc_state		*info = (void *) &dev->data;
393 	struct usb_driver		*driver = driver_of(intf);
394 
395 	/* combined interface - nothing  to do */
396 	if (info->data == info->control)
397 		return;
398 
399 	/* disconnect master --> disconnect slave */
400 	if (intf == info->control && info->data) {
401 		/* ensure immediate exit from usbnet_disconnect */
402 		usb_set_intfdata(info->data, NULL);
403 		usb_driver_release_interface(driver, info->data);
404 		info->data = NULL;
405 	}
406 
407 	/* and vice versa (just in case) */
408 	else if (intf == info->data && info->control) {
409 		/* ensure immediate exit from usbnet_disconnect */
410 		usb_set_intfdata(info->control, NULL);
411 		usb_driver_release_interface(driver, info->control);
412 		info->control = NULL;
413 	}
414 }
415 EXPORT_SYMBOL_GPL(usbnet_cdc_unbind);
416 
417 /* Communications Device Class, Ethernet Control model
418  *
419  * Takes two interfaces.  The DATA interface is inactive till an altsetting
420  * is selected.  Configuration data includes class descriptors.  There's
421  * an optional status endpoint on the control interface.
422  *
423  * This should interop with whatever the 2.4 "CDCEther.c" driver
424  * (by Brad Hards) talked with, with more functionality.
425  */
426 
427 static void dumpspeed(struct usbnet *dev, __le32 *speeds)
428 {
429 	netif_info(dev, timer, dev->net,
430 		   "link speeds: %u kbps up, %u kbps down\n",
431 		   __le32_to_cpu(speeds[0]) / 1000,
432 		   __le32_to_cpu(speeds[1]) / 1000);
433 }
434 
435 void usbnet_cdc_status(struct usbnet *dev, struct urb *urb)
436 {
437 	struct usb_cdc_notification	*event;
438 
439 	if (urb->actual_length < sizeof(*event))
440 		return;
441 
442 	/* SPEED_CHANGE can get split into two 8-byte packets */
443 	if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
444 		dumpspeed(dev, (__le32 *) urb->transfer_buffer);
445 		return;
446 	}
447 
448 	event = urb->transfer_buffer;
449 	switch (event->bNotificationType) {
450 	case USB_CDC_NOTIFY_NETWORK_CONNECTION:
451 		netif_dbg(dev, timer, dev->net, "CDC: carrier %s\n",
452 			  event->wValue ? "on" : "off");
453 		usbnet_link_change(dev, !!event->wValue, 0);
454 		break;
455 	case USB_CDC_NOTIFY_SPEED_CHANGE:	/* tx/rx rates */
456 		netif_dbg(dev, timer, dev->net, "CDC: speed change (len %d)\n",
457 			  urb->actual_length);
458 		if (urb->actual_length != (sizeof(*event) + 8))
459 			set_bit(EVENT_STS_SPLIT, &dev->flags);
460 		else
461 			dumpspeed(dev, (__le32 *) &event[1]);
462 		break;
463 	/* USB_CDC_NOTIFY_RESPONSE_AVAILABLE can happen too (e.g. RNDIS),
464 	 * but there are no standard formats for the response data.
465 	 */
466 	default:
467 		netdev_err(dev->net, "CDC: unexpected notification %02x!\n",
468 			   event->bNotificationType);
469 		break;
470 	}
471 }
472 EXPORT_SYMBOL_GPL(usbnet_cdc_status);
473 
474 int usbnet_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
475 {
476 	int				status;
477 	struct cdc_state		*info = (void *) &dev->data;
478 
479 	BUILD_BUG_ON((sizeof(((struct usbnet *)0)->data)
480 			< sizeof(struct cdc_state)));
481 
482 	status = usbnet_generic_cdc_bind(dev, intf);
483 	if (status < 0)
484 		return status;
485 
486 	status = usbnet_get_ethernet_addr(dev, info->ether->iMACAddress);
487 	if (status < 0) {
488 		usb_set_intfdata(info->data, NULL);
489 		usb_driver_release_interface(driver_of(intf), info->data);
490 		return status;
491 	}
492 
493 	return 0;
494 }
495 EXPORT_SYMBOL_GPL(usbnet_cdc_bind);
496 
497 static const struct driver_info	cdc_info = {
498 	.description =	"CDC Ethernet Device",
499 	.flags =	FLAG_ETHER | FLAG_POINTTOPOINT,
500 	.bind =		usbnet_cdc_bind,
501 	.unbind =	usbnet_cdc_unbind,
502 	.status =	usbnet_cdc_status,
503 	.set_rx_mode =	usbnet_cdc_update_filter,
504 	.manage_power =	usbnet_manage_power,
505 };
506 
507 static const struct driver_info wwan_info = {
508 	.description =	"Mobile Broadband Network Device",
509 	.flags =	FLAG_WWAN,
510 	.bind =		usbnet_cdc_bind,
511 	.unbind =	usbnet_cdc_unbind,
512 	.status =	usbnet_cdc_status,
513 	.set_rx_mode =	usbnet_cdc_update_filter,
514 	.manage_power =	usbnet_manage_power,
515 };
516 
517 /*-------------------------------------------------------------------------*/
518 
519 #define HUAWEI_VENDOR_ID	0x12D1
520 #define NOVATEL_VENDOR_ID	0x1410
521 #define ZTE_VENDOR_ID		0x19D2
522 #define DELL_VENDOR_ID		0x413C
523 #define REALTEK_VENDOR_ID	0x0bda
524 #define SAMSUNG_VENDOR_ID	0x04e8
525 
526 static const struct usb_device_id	products[] = {
527 /* BLACKLIST !!
528  *
529  * First blacklist any products that are egregiously nonconformant
530  * with the CDC Ethernet specs.  Minor braindamage we cope with; when
531  * they're not even trying, needing a separate driver is only the first
532  * of the differences to show up.
533  */
534 
535 #define	ZAURUS_MASTER_INTERFACE \
536 	.bInterfaceClass	= USB_CLASS_COMM, \
537 	.bInterfaceSubClass	= USB_CDC_SUBCLASS_ETHERNET, \
538 	.bInterfaceProtocol	= USB_CDC_PROTO_NONE
539 
540 /* SA-1100 based Sharp Zaurus ("collie"), or compatible;
541  * wire-incompatible with true CDC Ethernet implementations.
542  * (And, it seems, needlessly so...)
543  */
544 {
545 	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
546 			  | USB_DEVICE_ID_MATCH_DEVICE,
547 	.idVendor		= 0x04DD,
548 	.idProduct		= 0x8004,
549 	ZAURUS_MASTER_INTERFACE,
550 	.driver_info		= 0,
551 },
552 
553 /* PXA-25x based Sharp Zaurii.  Note that it seems some of these
554  * (later models especially) may have shipped only with firmware
555  * advertising false "CDC MDLM" compatibility ... but we're not
556  * clear which models did that, so for now let's assume the worst.
557  */
558 {
559 	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
560 			  | USB_DEVICE_ID_MATCH_DEVICE,
561 	.idVendor		= 0x04DD,
562 	.idProduct		= 0x8005,	/* A-300 */
563 	ZAURUS_MASTER_INTERFACE,
564 	.driver_info		= 0,
565 }, {
566 	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
567 			  | USB_DEVICE_ID_MATCH_DEVICE,
568 	.idVendor		= 0x04DD,
569 	.idProduct		= 0x8006,	/* B-500/SL-5600 */
570 	ZAURUS_MASTER_INTERFACE,
571 	.driver_info		= 0,
572 }, {
573 	.match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
574 			  | USB_DEVICE_ID_MATCH_DEVICE,
575 	.idVendor		= 0x04DD,
576 	.idProduct		= 0x8007,	/* C-700 */
577 	ZAURUS_MASTER_INTERFACE,
578 	.driver_info		= 0,
579 }, {
580 	.match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
581 		 | USB_DEVICE_ID_MATCH_DEVICE,
582 	.idVendor               = 0x04DD,
583 	.idProduct              = 0x9031,	/* C-750 C-760 */
584 	ZAURUS_MASTER_INTERFACE,
585 	.driver_info		= 0,
586 }, {
587 	.match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
588 		 | USB_DEVICE_ID_MATCH_DEVICE,
589 	.idVendor               = 0x04DD,
590 	.idProduct              = 0x9032,	/* SL-6000 */
591 	ZAURUS_MASTER_INTERFACE,
592 	.driver_info		= 0,
593 }, {
594 	.match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
595 		 | USB_DEVICE_ID_MATCH_DEVICE,
596 	.idVendor               = 0x04DD,
597 	/* reported with some C860 units */
598 	.idProduct              = 0x9050,	/* C-860 */
599 	ZAURUS_MASTER_INTERFACE,
600 	.driver_info		= 0,
601 },
602 
603 /* Olympus has some models with a Zaurus-compatible option.
604  * R-1000 uses a FreeScale i.MXL cpu (ARMv4T)
605  */
606 {
607 	.match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
608 		 | USB_DEVICE_ID_MATCH_DEVICE,
609 	.idVendor               = 0x07B4,
610 	.idProduct              = 0x0F02,	/* R-1000 */
611 	ZAURUS_MASTER_INTERFACE,
612 	.driver_info		= 0,
613 },
614 
615 /* LG Electronics VL600 wants additional headers on every frame */
616 {
617 	USB_DEVICE_AND_INTERFACE_INFO(0x1004, 0x61aa, USB_CLASS_COMM,
618 			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
619 	.driver_info = 0,
620 },
621 
622 /* Logitech Harmony 900 - uses the pseudo-MDLM (BLAN) driver */
623 {
624 	USB_DEVICE_AND_INTERFACE_INFO(0x046d, 0xc11f, USB_CLASS_COMM,
625 			USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
626 	.driver_info		= 0,
627 },
628 
629 /* Novatel USB551L and MC551 - handled by qmi_wwan */
630 {
631 	USB_DEVICE_AND_INTERFACE_INFO(NOVATEL_VENDOR_ID, 0xB001, USB_CLASS_COMM,
632 			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
633 	.driver_info = 0,
634 },
635 
636 /* Novatel E362 - handled by qmi_wwan */
637 {
638 	USB_DEVICE_AND_INTERFACE_INFO(NOVATEL_VENDOR_ID, 0x9010, USB_CLASS_COMM,
639 			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
640 	.driver_info = 0,
641 },
642 
643 /* Dell Wireless 5800 (Novatel E362) - handled by qmi_wwan */
644 {
645 	USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x8195, USB_CLASS_COMM,
646 			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
647 	.driver_info = 0,
648 },
649 
650 /* Dell Wireless 5800 (Novatel E362) - handled by qmi_wwan */
651 {
652 	USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x8196, USB_CLASS_COMM,
653 			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
654 	.driver_info = 0,
655 },
656 
657 /* Dell Wireless 5804 (Novatel E371) - handled by qmi_wwan */
658 {
659 	USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x819b, USB_CLASS_COMM,
660 			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
661 	.driver_info = 0,
662 },
663 
664 /* Novatel Expedite E371 - handled by qmi_wwan */
665 {
666 	USB_DEVICE_AND_INTERFACE_INFO(NOVATEL_VENDOR_ID, 0x9011, USB_CLASS_COMM,
667 			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
668 	.driver_info = 0,
669 },
670 
671 /* AnyDATA ADU960S - handled by qmi_wwan */
672 {
673 	USB_DEVICE_AND_INTERFACE_INFO(0x16d5, 0x650a, USB_CLASS_COMM,
674 			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
675 	.driver_info = 0,
676 },
677 
678 /* Huawei E1820 - handled by qmi_wwan */
679 {
680 	USB_DEVICE_INTERFACE_NUMBER(HUAWEI_VENDOR_ID, 0x14ac, 1),
681 	.driver_info = 0,
682 },
683 
684 /* Realtek RTL8152 Based USB 2.0 Ethernet Adapters */
685 {
686 	USB_DEVICE_AND_INTERFACE_INFO(REALTEK_VENDOR_ID, 0x8152, USB_CLASS_COMM,
687 			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
688 	.driver_info = 0,
689 },
690 
691 /* Realtek RTL8153 Based USB 3.0 Ethernet Adapters */
692 {
693 	USB_DEVICE_AND_INTERFACE_INFO(REALTEK_VENDOR_ID, 0x8153, USB_CLASS_COMM,
694 			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
695 	.driver_info = 0,
696 },
697 
698 /* Samsung USB Ethernet Adapters */
699 {
700 	USB_DEVICE_AND_INTERFACE_INFO(SAMSUNG_VENDOR_ID, 0xa101, USB_CLASS_COMM,
701 			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
702 	.driver_info = 0,
703 },
704 
705 /* WHITELIST!!!
706  *
707  * CDC Ether uses two interfaces, not necessarily consecutive.
708  * We match the main interface, ignoring the optional device
709  * class so we could handle devices that aren't exclusively
710  * CDC ether.
711  *
712  * NOTE:  this match must come AFTER entries blacklisting devices
713  * because of bugs/quirks in a given product (like Zaurus, above).
714  */
715 {
716 	/* ZTE (Vodafone) K3805-Z */
717 	USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1003, USB_CLASS_COMM,
718 				      USB_CDC_SUBCLASS_ETHERNET,
719 				      USB_CDC_PROTO_NONE),
720 	.driver_info = (unsigned long)&wwan_info,
721 }, {
722 	/* ZTE (Vodafone) K3806-Z */
723 	USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1015, USB_CLASS_COMM,
724 				      USB_CDC_SUBCLASS_ETHERNET,
725 				      USB_CDC_PROTO_NONE),
726 	.driver_info = (unsigned long)&wwan_info,
727 }, {
728 	/* ZTE (Vodafone) K4510-Z */
729 	USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1173, USB_CLASS_COMM,
730 				      USB_CDC_SUBCLASS_ETHERNET,
731 				      USB_CDC_PROTO_NONE),
732 	.driver_info = (unsigned long)&wwan_info,
733 }, {
734 	/* ZTE (Vodafone) K3770-Z */
735 	USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1177, USB_CLASS_COMM,
736 				      USB_CDC_SUBCLASS_ETHERNET,
737 				      USB_CDC_PROTO_NONE),
738 	.driver_info = (unsigned long)&wwan_info,
739 }, {
740 	/* ZTE (Vodafone) K3772-Z */
741 	USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1181, USB_CLASS_COMM,
742 				      USB_CDC_SUBCLASS_ETHERNET,
743 				      USB_CDC_PROTO_NONE),
744 	.driver_info = (unsigned long)&wwan_info,
745 }, {
746 	/* Telit modules */
747 	USB_VENDOR_AND_INTERFACE_INFO(0x1bc7, USB_CLASS_COMM,
748 			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
749 	.driver_info = (kernel_ulong_t) &wwan_info,
750 }, {
751 	USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ETHERNET,
752 			USB_CDC_PROTO_NONE),
753 	.driver_info = (unsigned long) &cdc_info,
754 }, {
755 	USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_MDLM,
756 			USB_CDC_PROTO_NONE),
757 	.driver_info = (unsigned long)&wwan_info,
758 
759 }, {
760 	/* Various Huawei modems with a network port like the UMG1831 */
761 	USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_COMM,
762 				      USB_CDC_SUBCLASS_ETHERNET, 255),
763 	.driver_info = (unsigned long)&wwan_info,
764 },
765 	{ },		/* END */
766 };
767 MODULE_DEVICE_TABLE(usb, products);
768 
769 static struct usb_driver cdc_driver = {
770 	.name =		"cdc_ether",
771 	.id_table =	products,
772 	.probe =	usbnet_probe,
773 	.disconnect =	usbnet_disconnect,
774 	.suspend =	usbnet_suspend,
775 	.resume =	usbnet_resume,
776 	.reset_resume =	usbnet_resume,
777 	.supports_autosuspend = 1,
778 	.disable_hub_initiated_lpm = 1,
779 };
780 
781 module_usb_driver(cdc_driver);
782 
783 MODULE_AUTHOR("David Brownell");
784 MODULE_DESCRIPTION("USB CDC Ethernet devices");
785 MODULE_LICENSE("GPL");
786