summaryrefslogtreecommitdiffstats
path: root/drivers/net/usb/cdc_ether.c
blob: b3b3c05903a1b3a863d2d4db43d20354133ff4f0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
/*
 * CDC Ethernet based networking peripherals
 * Copyright (C) 2003-2005 by David Brownell
 * Copyright (C) 2006 by Ole Andre Vadla Ravnas (ActiveSync)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

// #define	DEBUG			// error path messages, extra info
// #define	VERBOSE			// more; success messages

#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/workqueue.h>
#include <linux/mii.h>
#include <linux/usb.h>
#include <linux/usb/cdc.h>
#include <linux/usb/usbnet.h>


#if IS_ENABLED(CONFIG_USB_NET_RNDIS_HOST)

static int is_rndis(struct usb_interface_descriptor *desc)
{
	return (desc->bInterfaceClass == USB_CLASS_COMM &&
		desc->bInterfaceSubClass == 2 &&
		desc->bInterfaceProtocol == 0xff);
}

static int is_activesync(struct usb_interface_descriptor *desc)
{
	return (desc->bInterfaceClass == USB_CLASS_MISC &&
		desc->bInterfaceSubClass == 1 &&
		desc->bInterfaceProtocol == 1);
}

static int is_wireless_rndis(struct usb_interface_descriptor *desc)
{
	return (desc->bInterfaceClass == USB_CLASS_WIRELESS_CONTROLLER &&
		desc->bInterfaceSubClass == 1 &&
		desc->bInterfaceProtocol == 3);
}

static int is_novatel_rndis(struct usb_interface_descriptor *desc)
{
	return (desc->bInterfaceClass == USB_CLASS_MISC &&
		desc->bInterfaceSubClass == 4 &&
		desc->bInterfaceProtocol == 1);
}

#else

#define is_rndis(desc)		0
#define is_activesync(desc)	0
#define is_wireless_rndis(desc)	0
#define is_novatel_rndis(desc)	0

#endif

static const u8 mbm_guid[16] = {
	0xa3, 0x17, 0xa8, 0x8b, 0x04, 0x5e, 0x4f, 0x01,
	0xa6, 0x07, 0xc0, 0xff, 0xcb, 0x7e, 0x39, 0x2a,
};

static void usbnet_cdc_update_filter(struct usbnet *dev)
{
	struct cdc_state	*info = (void *) &dev->data;
	struct usb_interface	*intf = info->control;
	struct net_device	*net = dev->net;

	u16 cdc_filter = USB_CDC_PACKET_TYPE_DIRECTED
			| USB_CDC_PACKET_TYPE_BROADCAST;

	/* filtering on the device is an optional feature and not worth
	 * the hassle so we just roughly care about snooping and if any
	 * multicast is requested, we take every multicast
	 */
	if (net->flags & IFF_PROMISC)
		cdc_filter |= USB_CDC_PACKET_TYPE_PROMISCUOUS;
	if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI))
		cdc_filter |= USB_CDC_PACKET_TYPE_ALL_MULTICAST;

	usb_control_msg(dev->udev,
			usb_sndctrlpipe(dev->udev, 0),
			USB_CDC_SET_ETHERNET_PACKET_FILTER,
			USB_TYPE_CLASS | USB_RECIP_INTERFACE,
			cdc_filter,
			intf->cur_altsetting->desc.bInterfaceNumber,
			NULL,
			0,
			USB_CTRL_SET_TIMEOUT
		);
}

/* probes control interface, claims data interface, collects the bulk
 * endpoints, activates data interface (if needed), maybe sets MTU.
 * all pure cdc, except for certain firmware workarounds, and knowing
 * that rndis uses one different rule.
 */
int usbnet_generic_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
{
	u8				*buf = intf->cur_altsetting->extra;
	int				len = intf->cur_altsetting->extralen;
	struct usb_interface_descriptor	*d;
	struct cdc_state		*info = (void *) &dev->data;
	int				status;
	int				rndis;
	bool				android_rndis_quirk = false;
	struct usb_driver		*driver = driver_of(intf);
	struct usb_cdc_parsed_header header;

	if (sizeof(dev->data) < sizeof(*info))
		return -EDOM;

	/* expect strict spec conformance for the descriptors, but
	 * cope with firmware which stores them in the wrong place
	 */
	if (len == 0 && dev->udev->actconfig->extralen) {
		/* Motorola SB4100 (and others: Brad Hards says it's
		 * from a Broadcom design) put CDC descriptors here
		 */
		buf = dev->udev->actconfig->extra;
		len = dev->udev->actconfig->extralen;
		dev_dbg(&intf->dev, "CDC descriptors on config\n");
	}

	/* Maybe CDC descriptors are after the endpoint?  This bug has
	 * been seen on some 2Wire Inc RNDIS-ish products.
	 */
	if (len == 0) {
		struct usb_host_endpoint	*hep;

		hep = intf->cur_altsetting->endpoint;
		if (hep) {
			buf = hep->extra;
			len = hep->extralen;
		}
		if (len)
			dev_dbg(&intf->dev,
				"CDC descriptors on endpoint\n");
	}

	/* this assumes that if there's a non-RNDIS vendor variant
	 * of cdc-acm, it'll fail RNDIS requests cleanly.
	 */
	rndis = (is_rndis(&intf->cur_altsetting->desc) ||
		 is_activesync(&intf->cur_altsetting->desc) ||
		 is_wireless_rndis(&intf->cur_altsetting->desc) ||
		 is_novatel_rndis(&intf->cur_altsetting->desc));

	memset(info, 0, sizeof(*info));
	info->control = intf;

	cdc_parse_cdc_header(&header, intf, buf, len);

	info->u = header.usb_cdc_union_desc;
	info->header = header.usb_cdc_header_desc;
	info->ether = header.usb_cdc_ether_desc;
	if (!info->u) {
		if (rndis)
			goto skip;
		else /* in that case a quirk is mandatory */
			goto bad_desc;
	}
	/* we need a master/control interface (what we're
	 * probed with) and a slave/data interface; union
	 * descriptors sort this all out.
	 */
	info->control = usb_ifnum_to_if(dev->udev,
	info->u->bMasterInterface0);
	info->data = usb_ifnum_to_if(dev->udev,
		info->u->bSlaveInterface0);
	if (!info->control || !info->data) {
		dev_dbg(&intf->dev,
			"master #%u/%p slave #%u/%p\n",
			info->u->bMasterInterface0,
			info->control,
			info->u->bSlaveInterface0,
			info->data);
		/* fall back to hard-wiring for RNDIS */
		if (rndis) {
			android_rndis_quirk = true;
			goto skip;
		}
		goto bad_desc;
	}
	if (info->control != intf) {
		dev_dbg(&intf->dev, "bogus CDC Union\n");
		/* Ambit USB Cable Modem (and maybe others)
		 * interchanges master and slave interface.
		 */
		if (info->data == intf) {
			info->data = info->control;
			info->control = intf;
		} else
			goto bad_desc;
	}

	/* some devices merge these - skip class check */
	if (info->control == info->data)
		goto skip;

	/* a data interface altsetting does the real i/o */
	d = &info->data->cur_altsetting->desc;
	if (d->bInterfaceClass != USB_CLASS_CDC_DATA) {
		dev_dbg(&intf->dev, "slave class %u\n",
			d->bInterfaceClass);
		goto bad_desc;
	}
skip:
	if (	rndis &&
		header.usb_cdc_acm_descriptor &&
		header.usb_cdc_acm_descriptor->bmCapabilities) {
			dev_dbg(&intf->dev,
				"ACM capabilities %02x, not really RNDIS?\n",
				header.usb_cdc_acm_descriptor->bmCapabilities);
			goto bad_desc;
	}

	if (header.usb_cdc_ether_desc && info->ether->wMaxSegmentSize) {
		dev->hard_mtu = le16_to_cpu(info->ether->wMaxSegmentSize);
		/* because of Zaurus, we may be ignoring the host
		 * side link address we were given.
		 */
	}

	if (header.usb_cdc_mdlm_desc &&
		memcmp(header.usb_cdc_mdlm_desc->bGUID, mbm_guid, 16)) {
		dev_dbg(&intf->dev, "GUID doesn't match\n");
		goto bad_desc;
	}

	if (header.usb_cdc_mdlm_detail_desc &&
		header.usb_cdc_mdlm_detail_desc->bLength <
			(sizeof(struct usb_cdc_mdlm_detail_desc) + 1)) {
		dev_dbg(&intf->dev, "Descriptor too short\n");
		goto bad_desc;
	}



	/* Microsoft ActiveSync based and some regular RNDIS devices lack the
	 * CDC descriptors, so we'll hard-wire the interfaces and not check
	 * for descriptors.
	 *
	 * Some Android RNDIS devices have a CDC Union descriptor pointing
	 * to non-existing interfaces.  Ignore that and attempt the same
	 * hard-wired 0 and 1 interfaces.
	 */
	if (rndis && (!info->u || android_rndis_quirk)) {
		info->control = usb_ifnum_to_if(dev->udev, 0);
		info->data = usb_ifnum_to_if(dev->udev, 1);
		if (!info->control || !info->data || info->control != intf) {
			dev_dbg(&intf->dev,
				"rndis: master #0/%p slave #1/%p\n",
				info->control,
				info->data);
			goto bad_desc;
		}

	} else if (!info->header || (!rndis && !info->ether)) {
		dev_dbg(&intf->dev, "missing cdc %s%s%sdescriptor\n",
			info->header ? "" : "header ",
			info->u ? "" : "union ",
			info->ether ? "" : "ether ");
		goto bad_desc;
	}

	/* claim data interface and set it up ... with side effects.
	 * network traffic can't flow until an altsetting is enabled.
	 */
	if (info->data != info->control) {
		status = usb_driver_claim_interface(driver, info->data, dev);
		if (status < 0)
			return status;
	}
	status = usbnet_get_endpoints(dev, info->data);
	if (status < 0) {
		/* ensure immediate exit from usbnet_disconnect */
		usb_set_intfdata(info->data, NULL);
		if (info->data != info->control)
			usb_driver_release_interface(driver, info->data);
		return status;
	}

	/* status endpoint: optional for CDC Ethernet, not RNDIS (or ACM) */
	if (info->data != info->control)
		dev->status = NULL;
	if (info->control->cur_altsetting->desc.bNumEndpoints == 1) {
		struct usb_endpoint_descriptor	*desc;

		dev->status = &info->control->cur_altsetting->endpoint [0];
		desc = &dev->status->desc;
		if (!usb_endpoint_is_int_in(desc) ||
		    (le16_to_cpu(desc->wMaxPacketSize)
		     < sizeof(struct usb_cdc_notification)) ||
		    !desc->bInterval) {
			dev_dbg(&intf->dev, "bad notification endpoint\n");
			dev->status = NULL;
		}
	}
	if (rndis && !dev->status) {
		dev_dbg(&intf->dev, "missing RNDIS status endpoint\n");
		usb_set_intfdata(info->data, NULL);
		usb_driver_release_interface(driver, info->data);
		return -ENODEV;
	}

	return 0;

bad_desc:
	dev_info(&dev->udev->dev, "bad CDC descriptors\n");
	return -ENODEV;
}
EXPORT_SYMBOL_GPL(usbnet_generic_cdc_bind);


/* like usbnet_generic_cdc_bind() but handles filter initialization
 * correctly
 */
int usbnet_ether_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
{
	int rv;

	rv = usbnet_generic_cdc_bind(dev, intf);
	if (rv < 0)
		goto bail_out;

	/* Some devices don't initialise properly. In particular
	 * the packet filter is not reset. There are devices that
	 * don't do reset all the way. So the packet filter should
	 * be set to a sane initial value.
	 */
	usbnet_cdc_update_filter(dev);

bail_out:
	return rv;
}
EXPORT_SYMBOL_GPL(usbnet_ether_cdc_bind);

void usbnet_cdc_unbind(struct usbnet *dev, struct usb_interface *intf)
{
	struct cdc_state		*info = (void *) &dev->data;
	struct usb_driver		*driver = driver_of(intf);

	/* combined interface - nothing  to do */
	if (info->data == info->control)
		return;

	/* disconnect master --> disconnect slave */
	if (intf == info->control && info->data) {
		/* ensure immediate exit from usbnet_disconnect */
		usb_set_intfdata(info->data, NULL);
		usb_driver_release_interface(driver, info->data);
		info->data = NULL;
	}

	/* and vice versa (just in case) */
	else if (intf == info->data && info->control) {
		/* ensure immediate exit from usbnet_disconnect */
		usb_set_intfdata(info->control, NULL);
		usb_driver_release_interface(driver, info->control);
		info->control = NULL;
	}
}
EXPORT_SYMBOL_GPL(usbnet_cdc_unbind);

/* Communications Device Class, Ethernet Control model
 *
 * Takes two interfaces.  The DATA interface is inactive till an altsetting
 * is selected.  Configuration data includes class descriptors.  There's
 * an optional status endpoint on the control interface.
 *
 * This should interop with whatever the 2.4 "CDCEther.c" driver
 * (by Brad Hards) talked with, with more functionality.
 */

static void dumpspeed(struct usbnet *dev, __le32 *speeds)
{
	netif_info(dev, timer, dev->net,
		   "link speeds: %u kbps up, %u kbps down\n",
		   __le32_to_cpu(speeds[0]) / 1000,
		   __le32_to_cpu(speeds[1]) / 1000);
}

void usbnet_cdc_status(struct usbnet *dev, struct urb *urb)
{
	struct usb_cdc_notification	*event;

	if (urb->actual_length < sizeof(*event))
		return;

	/* SPEED_CHANGE can get split into two 8-byte packets */
	if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
		dumpspeed(dev, (__le32 *) urb->transfer_buffer);
		return;
	}

	event = urb->transfer_buffer;
	switch (event->bNotificationType) {
	case USB_CDC_NOTIFY_NETWORK_CONNECTION:
		netif_dbg(dev, timer, dev->net, "CDC: carrier %s\n",
			  event->wValue ? "on" : "off");
		usbnet_link_change(dev, !!event->wValue, 0);
		break;
	case USB_CDC_NOTIFY_SPEED_CHANGE:	/* tx/rx rates */
		netif_dbg(dev, timer, dev->net, "CDC: speed change (len %d)\n",
			  urb->actual_length);
		if (urb->actual_length != (sizeof(*event) + 8))
			set_bit(EVENT_STS_SPLIT, &dev->flags);
		else
			dumpspeed(dev, (__le32 *) &event[1]);
		break;
	/* USB_CDC_NOTIFY_RESPONSE_AVAILABLE can happen too (e.g. RNDIS),
	 * but there are no standard formats for the response data.
	 */
	default:
		netdev_err(dev->net, "CDC: unexpected notification %02x!\n",
			   event->bNotificationType);
		break;
	}
}
EXPORT_SYMBOL_GPL(usbnet_cdc_status);

int usbnet_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
{
	int				status;
	struct cdc_state		*info = (void *) &dev->data;

	BUILD_BUG_ON((sizeof(((struct usbnet *)0)->data)
			< sizeof(struct cdc_state)));

	status = usbnet_ether_cdc_bind(dev, intf);
	if (status < 0)
		return status;

	status = usbnet_get_ethernet_addr(dev, info->ether->iMACAddress);
	if (status < 0) {
		usb_set_intfdata(info->data, NULL);
		usb_driver_release_interface(driver_of(intf), info->data);
		return status;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(usbnet_cdc_bind);

static int usbnet_cdc_zte_bind(struct usbnet *dev, struct usb_interface *intf)
{
	int status = usbnet_cdc_bind(dev, intf);

	if (!status && (dev->net->dev_addr[0] & 0x02))
		eth_hw_addr_random(dev->net);

	return status;
}

/* Make sure packets have correct destination MAC address
 *
 * A firmware bug observed on some devices (ZTE MF823/831/910) is that the
 * device sends packets with a static, bogus, random MAC address (event if
 * device MAC address has been updated). Always set MAC address to that of the
 * device.
 */
static int usbnet_cdc_zte_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
{
	if (skb->len < ETH_HLEN || !(skb->data[0] & 0x02))
		return 1;

	skb_reset_mac_header(skb);
	ether_addr_copy(eth_hdr(skb)->h_dest, dev->net->dev_addr);

	return 1;
}

/* Ensure correct link state
 *
 * Some devices (ZTE MF823/831/910) export two carrier on notifications when
 * connected. This causes the link state to be incorrect. Work around this by
 * always setting the state to off, then on.
 */
static void usbnet_cdc_zte_status(struct usbnet *dev, struct urb *urb)
{
	struct usb_cdc_notification *event;

	if (urb->actual_length < sizeof(*event))
		return;

	event = urb->transfer_buffer;

	if (event->bNotificationType != USB_CDC_NOTIFY_NETWORK_CONNECTION) {
		usbnet_cdc_status(dev, urb);
		return;
	}

	netif_dbg(dev, timer, dev->net, "CDC: carrier %s\n",
		  event->wValue ? "on" : "off");

	if (event->wValue &&
	    netif_carrier_ok(dev->net))
		netif_carrier_off(dev->net);

	usbnet_link_change(dev, !!event->wValue, 0);
}

static const struct driver_info	cdc_info = {
	.description =	"CDC Ethernet Device",
	.flags =	FLAG_ETHER | FLAG_POINTTOPOINT,
	.bind =		usbnet_cdc_bind,
	.unbind =	usbnet_cdc_unbind,
	.status =	usbnet_cdc_status,
	.set_rx_mode =	usbnet_cdc_update_filter,
	.manage_power =	usbnet_manage_power,
};

static const struct driver_info	zte_cdc_info = {
	.description =	"ZTE CDC Ethernet Device",
	.flags =	FLAG_ETHER | FLAG_POINTTOPOINT,
	.bind =		usbnet_cdc_zte_bind,
	.unbind =	usbnet_cdc_unbind,
	.status =	usbnet_cdc_zte_status,
	.set_rx_mode =	usbnet_cdc_update_filter,
	.manage_power =	usbnet_manage_power,
	.rx_fixup = usbnet_cdc_zte_rx_fixup,
};

static const struct driver_info wwan_info = {
	.description =	"Mobile Broadband Network Device",
	.flags =	FLAG_WWAN,
	.bind =		usbnet_cdc_bind,
	.unbind =	usbnet_cdc_unbind,
	.status =	usbnet_cdc_status,
	.set_rx_mode =	usbnet_cdc_update_filter,
	.manage_power =	usbnet_manage_power,
};

/*-------------------------------------------------------------------------*/

#define HUAWEI_VENDOR_ID	0x12D1
#define NOVATEL_VENDOR_ID	0x1410
#define ZTE_VENDOR_ID		0x19D2
#define DELL_VENDOR_ID		0x413C
#define REALTEK_VENDOR_ID	0x0bda
#define SAMSUNG_VENDOR_ID	0x04e8
#define LENOVO_VENDOR_ID	0x17ef
#define LINKSYS_VENDOR_ID	0x13b1
#define NVIDIA_VENDOR_ID	0x0955
#define HP_VENDOR_ID		0x03f0
#define MICROSOFT_VENDOR_ID	0x045e
#define UBLOX_VENDOR_ID		0x1546
#define TPLINK_VENDOR_ID	0x2357
#define AQUANTIA_VENDOR_ID	0x2eca
#define ASIX_VENDOR_ID		0x0b95

static const struct usb_device_id	products[] = {
/* BLACKLIST !!
 *
 * First blacklist any products that are egregiously nonconformant
 * with the CDC Ethernet specs.  Minor braindamage we cope with; when
 * they're not even trying, needing a separate driver is only the first
 * of the differences to show up.
 */

#define	ZAURUS_MASTER_INTERFACE \
	.bInterfaceClass	= USB_CLASS_COMM, \
	.bInterfaceSubClass	= USB_CDC_SUBCLASS_ETHERNET, \
	.bInterfaceProtocol	= USB_CDC_PROTO_NONE

/* SA-1100 based Sharp Zaurus ("collie"), or compatible;
 * wire-incompatible with true CDC Ethernet implementations.
 * (And, it seems, needlessly so...)
 */
{
	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
			  | USB_DEVICE_ID_MATCH_DEVICE,
	.idVendor		= 0x04DD,
	.idProduct		= 0x8004,
	ZAURUS_MASTER_INTERFACE,
	.driver_info		= 0,
},

/* PXA-25x based Sharp Zaurii.  Note that it seems some of these
 * (later models especially) may have shipped only with firmware
 * advertising false "CDC MDLM" compatibility ... but we're not
 * clear which models did that, so for now let's assume the worst.
 */
{
	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
			  | USB_DEVICE_ID_MATCH_DEVICE,
	.idVendor		= 0x04DD,
	.idProduct		= 0x8005,	/* A-300 */
	ZAURUS_MASTER_INTERFACE,
	.driver_info		= 0,
}, {
	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
			  | USB_DEVICE_ID_MATCH_DEVICE,
	.idVendor		= 0x04DD,
	.idProduct		= 0x8006,	/* B-500/SL-5600 */
	ZAURUS_MASTER_INTERFACE,
	.driver_info		= 0,
}, {
	.match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
			  | USB_DEVICE_ID_MATCH_DEVICE,
	.idVendor		= 0x04DD,
	.idProduct		= 0x8007,	/* C-700 */
	ZAURUS_MASTER_INTERFACE,
	.driver_info		= 0,
}, {
	.match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
		 | USB_DEVICE_ID_MATCH_DEVICE,
	.idVendor               = 0x04DD,
	.idProduct              = 0x9031,	/* C-750 C-760 */
	ZAURUS_MASTER_INTERFACE,
	.driver_info		= 0,
}, {
	.match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
		 | USB_DEVICE_ID_MATCH_DEVICE,
	.idVendor               = 0x04DD,
	.idProduct              = 0x9032,	/* SL-6000 */
	ZAURUS_MASTER_INTERFACE,
	.driver_info		= 0,
}, {
	.match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
		 | USB_DEVICE_ID_MATCH_DEVICE,
	.idVendor               = 0x04DD,
	/* reported with some C860 units */
	.idProduct              = 0x9050,	/* C-860 */
	ZAURUS_MASTER_INTERFACE,
	.driver_info		= 0,
},

/* Olympus has some models with a Zaurus-compatible option.
 * R-1000 uses a FreeScale i.MXL cpu (ARMv4T)
 */
{
	.match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
		 | USB_DEVICE_ID_MATCH_DEVICE,
	.idVendor               = 0x07B4,
	.idProduct              = 0x0F02,	/* R-1000 */
	ZAURUS_MASTER_INTERFACE,
	.driver_info		= 0,
},

/* LG Electronics VL600 wants additional headers on every frame */
{
	USB_DEVICE_AND_INTERFACE_INFO(0x1004, 0x61aa, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* Logitech Harmony 900 - uses the pseudo-MDLM (BLAN) driver */
{
	USB_DEVICE_AND_INTERFACE_INFO(0x046d, 0xc11f, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
	.driver_info		= 0,
},

/* Novatel USB551L and MC551 - handled by qmi_wwan */
{
	USB_DEVICE_AND_INTERFACE_INFO(NOVATEL_VENDOR_ID, 0xB001, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* Novatel E362 - handled by qmi_wwan */
{
	USB_DEVICE_AND_INTERFACE_INFO(NOVATEL_VENDOR_ID, 0x9010, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* Dell Wireless 5800 (Novatel E362) - handled by qmi_wwan */
{
	USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x8195, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* Dell Wireless 5800 (Novatel E362) - handled by qmi_wwan */
{
	USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x8196, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* Dell Wireless 5804 (Novatel E371) - handled by qmi_wwan */
{
	USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x819b, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* Novatel Expedite E371 - handled by qmi_wwan */
{
	USB_DEVICE_AND_INTERFACE_INFO(NOVATEL_VENDOR_ID, 0x9011, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* HP lt2523 (Novatel E371) - handled by qmi_wwan */
{
	USB_DEVICE_AND_INTERFACE_INFO(HP_VENDOR_ID, 0x421d, USB_CLASS_COMM,
				      USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* AnyDATA ADU960S - handled by qmi_wwan */
{
	USB_DEVICE_AND_INTERFACE_INFO(0x16d5, 0x650a, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* Huawei E1820 - handled by qmi_wwan */
{
	USB_DEVICE_INTERFACE_NUMBER(HUAWEI_VENDOR_ID, 0x14ac, 1),
	.driver_info = 0,
},

/* Realtek RTL8152 Based USB 2.0 Ethernet Adapters */
{
	USB_DEVICE_AND_INTERFACE_INFO(REALTEK_VENDOR_ID, 0x8152, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* Realtek RTL8153 Based USB 3.0 Ethernet Adapters */
{
	USB_DEVICE_AND_INTERFACE_INFO(REALTEK_VENDOR_ID, 0x8153, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* Samsung USB Ethernet Adapters */
{
	USB_DEVICE_AND_INTERFACE_INFO(SAMSUNG_VENDOR_ID, 0xa101, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

#if IS_ENABLED(CONFIG_USB_RTL8152)
/* Linksys USB3GIGV1 Ethernet Adapter */
{
	USB_DEVICE_AND_INTERFACE_INFO(LINKSYS_VENDOR_ID, 0x0041, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},
#endif

/* ThinkPad USB-C Dock (based on Realtek RTL8153) */
{
	USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x3062, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* ThinkPad Thunderbolt 3 Dock (based on Realtek RTL8153) */
{
	USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x3069, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* Lenovo Thinkpad USB 3.0 Ethernet Adapters (based on Realtek RTL8153) */
{
	USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x7205, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* Lenovo USB C to Ethernet Adapter (based on Realtek RTL8153) */
{
	USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x720c, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* Lenovo USB-C Travel Hub (based on Realtek RTL8153) */
{
	USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x7214, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* NVIDIA Tegra USB 3.0 Ethernet Adapters (based on Realtek RTL8153) */
{
	USB_DEVICE_AND_INTERFACE_INFO(NVIDIA_VENDOR_ID, 0x09ff, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* Microsoft Surface 2 dock (based on Realtek RTL8152) */
{
	USB_DEVICE_AND_INTERFACE_INFO(MICROSOFT_VENDOR_ID, 0x07ab, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* Microsoft Surface 3 dock (based on Realtek RTL8153) */
{
	USB_DEVICE_AND_INTERFACE_INFO(MICROSOFT_VENDOR_ID, 0x07c6, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

	/* TP-LINK UE300 USB 3.0 Ethernet Adapters (based on Realtek RTL8153) */
{
	USB_DEVICE_AND_INTERFACE_INFO(TPLINK_VENDOR_ID, 0x0601, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* Aquantia AQtion USB to 5GbE Controller (based on AQC111U) */
{
	USB_DEVICE_AND_INTERFACE_INFO(AQUANTIA_VENDOR_ID, 0xc101,
				      USB_CLASS_COMM, USB_CDC_SUBCLASS_ETHERNET,
				      USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* ASIX USB 3.1 Gen1 to 5G Multi-Gigabit Ethernet Adapter(based on AQC111U) */
{
	USB_DEVICE_AND_INTERFACE_INFO(ASIX_VENDOR_ID, 0x2790, USB_CLASS_COMM,
				      USB_CDC_SUBCLASS_ETHERNET,
				      USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* ASIX USB 3.1 Gen1 to 2.5G Multi-Gigabit Ethernet Adapter(based on AQC112U) */
{
	USB_DEVICE_AND_INTERFACE_INFO(ASIX_VENDOR_ID, 0x2791, USB_CLASS_COMM,
				      USB_CDC_SUBCLASS_ETHERNET,
				      USB_CDC_PROTO_NONE),
	.driver_info = 0,
},

/* WHITELIST!!!
 *
 * CDC Ether uses two interfaces, not necessarily consecutive.
 * We match the main interface, ignoring the optional device
 * class so we could handle devices that aren't exclusively
 * CDC ether.
 *
 * NOTE:  this match must come AFTER entries blacklisting devices
 * because of bugs/quirks in a given product (like Zaurus, above).
 */
{
	/* ZTE (Vodafone) K3805-Z */
	USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1003, USB_CLASS_COMM,
				      USB_CDC_SUBCLASS_ETHERNET,
				      USB_CDC_PROTO_NONE),
	.driver_info = (unsigned long)&wwan_info,
}, {
	/* ZTE (Vodafone) K3806-Z */
	USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1015, USB_CLASS_COMM,
				      USB_CDC_SUBCLASS_ETHERNET,
				      USB_CDC_PROTO_NONE),
	.driver_info = (unsigned long)&wwan_info,
}, {
	/* ZTE (Vodafone) K4510-Z */
	USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1173, USB_CLASS_COMM,
				      USB_CDC_SUBCLASS_ETHERNET,
				      USB_CDC_PROTO_NONE),
	.driver_info = (unsigned long)&wwan_info,
}, {
	/* ZTE (Vodafone) K3770-Z */
	USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1177, USB_CLASS_COMM,
				      USB_CDC_SUBCLASS_ETHERNET,
				      USB_CDC_PROTO_NONE),
	.driver_info = (unsigned long)&wwan_info,
}, {
	/* ZTE (Vodafone) K3772-Z */
	USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1181, USB_CLASS_COMM,
				      USB_CDC_SUBCLASS_ETHERNET,
				      USB_CDC_PROTO_NONE),
	.driver_info = (unsigned long)&wwan_info,
}, {
	/* Telit modules */
	USB_VENDOR_AND_INTERFACE_INFO(0x1bc7, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = (kernel_ulong_t) &wwan_info,
}, {
	/* Dell DW5580 modules */
	USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x81ba, USB_CLASS_COMM,
			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
	.driver_info = (kernel_ulong_t)&wwan_info,
}, {
	/* Huawei ME906 and ME909 */
	USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0x15c1, USB_CLASS_COMM,
				      USB_CDC_SUBCLASS_ETHERNET,
				      USB_CDC_PROTO_NONE),
	.driver_info = (unsigned long)&wwan_info,
}, {
	/* ZTE modules */
	USB_VENDOR_AND_INTERFACE_INFO(ZTE_VENDOR_ID, USB_CLASS_COMM,
				      USB_CDC_SUBCLASS_ETHERNET,
				      USB_CDC_PROTO_NONE),
	.driver_info = (unsigned long)&zte_cdc_info,
}, {
	/* U-blox TOBY-L2 */
	USB_DEVICE_AND_INTERFACE_INFO(UBLOX_VENDOR_ID, 0x1143, USB_CLASS_COMM,
				      USB_CDC_SUBCLASS_ETHERNET,
				      USB_CDC_PROTO_NONE),
	.driver_info = (unsigned long)&wwan_info,
}, {
	/* U-blox SARA-U2 */
	USB_DEVICE_AND_INTERFACE_INFO(UBLOX_VENDOR_ID, 0x1104, USB_CLASS_COMM,
				      USB_CDC_SUBCLASS_ETHERNET,
				      USB_CDC_PROTO_NONE),
	.driver_info = (unsigned long)&wwan_info,
}, {
	/* Cinterion PLS8 modem by GEMALTO */
	USB_DEVICE_AND_INTERFACE_INFO(0x1e2d, 0x0061, USB_CLASS_COMM,
				      USB_CDC_SUBCLASS_ETHERNET,
				      USB_CDC_PROTO_NONE),
	.driver_info = (unsigned long)&wwan_info,
}, {
	/* Cinterion AHS3 modem by GEMALTO */
	USB_DEVICE_AND_INTERFACE_INFO(0x1e2d, 0x0055, USB_CLASS_COMM,
				      USB_CDC_SUBCLASS_ETHERNET,
				      USB_CDC_PROTO_NONE),
	.driver_info = (unsigned long)&wwan_info,
}, {
	USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ETHERNET,
			USB_CDC_PROTO_NONE),
	.driver_info = (unsigned long) &cdc_info,
}, {
	USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_MDLM,
			USB_CDC_PROTO_NONE),
	.driver_info = (unsigned long)&wwan_info,

}, {
	/* Various Huawei modems with a network port like the UMG1831 */
	USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_COMM,
				      USB_CDC_SUBCLASS_ETHERNET, 255),
	.driver_info = (unsigned long)&wwan_info,
},
	{ },		/* END */
};
MODULE_DEVICE_TABLE(usb, products);

static struct usb_driver cdc_driver = {
	.name =		"cdc_ether",
	.id_table =	products,
	.probe =	usbnet_probe,
	.disconnect =	usbnet_disconnect,
	.suspend =	usbnet_suspend,
	.resume =	usbnet_resume,
	.reset_resume =	usbnet_resume,
	.supports_autosuspend = 1,
	.disable_hub_initiated_lpm = 1,
};

module_usb_driver(cdc_driver);

MODULE_AUTHOR("David Brownell");
MODULE_DESCRIPTION("USB CDC Ethernet devices");
MODULE_LICENSE("GPL");