drivers/net/usb/cdc_ether.c

   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_parsed_header header;
 116
 117         if (sizeof(dev->data) < sizeof(*info))
 118                 return -EDOM;
 119
 120         /* expect strict spec conformance for the descriptors, but
 121          * cope with firmware which stores them in the wrong place
 122          */
 123         if (len == 0 && dev->udev->actconfig->extralen) {
 124                 /* Motorola SB4100 (and others: Brad Hards says it's
 125                  * from a Broadcom design) put CDC descriptors here
 126                  */
 127                 buf = dev->udev->actconfig->extra;
 128                 len = dev->udev->actconfig->extralen;
 129                 dev_dbg(&intf->dev, "CDC descriptors on config\n");
 130         }
 131
 132         /* Maybe CDC descriptors are after the endpoint?  This bug has
 133          * been seen on some 2Wire Inc RNDIS-ish products.
 134          */
 135         if (len == 0) {
 136                 struct usb_host_endpoint        *hep;
 137
 138                 hep = intf->cur_altsetting->endpoint;
 139                 if (hep) {
 140                         buf = hep->extra;
 141                         len = hep->extralen;
 142                 }
 143                 if (len)
 144                         dev_dbg(&intf->dev,
 145                                 "CDC descriptors on endpoint\n");
 146         }
 147
 148         /* this assumes that if there's a non-RNDIS vendor variant
 149          * of cdc-acm, it'll fail RNDIS requests cleanly.
 150          */
 151         rndis = (is_rndis(&intf->cur_altsetting->desc) ||
 152                  is_activesync(&intf->cur_altsetting->desc) ||
 153                  is_wireless_rndis(&intf->cur_altsetting->desc));
 154
 155         memset(info, 0, sizeof(*info));
 156         info->control = intf;
 157
 158         cdc_parse_cdc_header(&header, intf, buf, len);
 159
 160         info->u = header.usb_cdc_union_desc;
 161         info->header = header.usb_cdc_header_desc;
 162         info->ether = header.usb_cdc_ether_desc;
 163         if (!info->u) {
 164                 if (rndis)
 165                         goto skip;
 166                 else /* in that case a quirk is mandatory */
 167                         goto bad_desc;
 168         }
 169         /* we need a master/control interface (what we're
 170          * probed with) and a slave/data interface; union
 171          * descriptors sort this all out.
 172          */
 173         info->control = usb_ifnum_to_if(dev->udev,
 174         info->u->bMasterInterface0);
 175         info->data = usb_ifnum_to_if(dev->udev,
 176                 info->u->bSlaveInterface0);
 177         if (!info->control || !info->data) {
 178                 dev_dbg(&intf->dev,
 179                         "master #%u/%p slave #%u/%p\n",
 180                         info->u->bMasterInterface0,
 181                         info->control,
 182                         info->u->bSlaveInterface0,
 183                         info->data);
 184                 /* fall back to hard-wiring for RNDIS */
 185                 if (rndis) {
 186                         android_rndis_quirk = true;
 187                         goto skip;
 188                 }
 189                 goto bad_desc;
 190         }
 191         if (info->control != intf) {
 192                 dev_dbg(&intf->dev, "bogus CDC Union\n");
 193                 /* Ambit USB Cable Modem (and maybe others)
 194                  * interchanges master and slave interface.
 195                  */
 196                 if (info->data == intf) {
 197                         info->data = info->control;
 198                         info->control = intf;
 199                 } else
 200                         goto bad_desc;
 201         }
 202
 203         /* some devices merge these - skip class check */
 204         if (info->control == info->data)
 205                 goto skip;
 206
 207         /* a data interface altsetting does the real i/o */
 208         d = &info->data->cur_altsetting->desc;
 209         if (d->bInterfaceClass != USB_CLASS_CDC_DATA) {
 210                 dev_dbg(&intf->dev, "slave class %u\n",
 211                         d->bInterfaceClass);
 212                 goto bad_desc;
 213         }
 214 skip:
 215         if (    rndis &&
 216                 header.usb_cdc_acm_descriptor &&
 217                 header.usb_cdc_acm_descriptor->bmCapabilities) {
 218                         dev_dbg(&intf->dev,
 219                                 "ACM capabilities %02x, not really RNDIS?\n",
 220                                 header.usb_cdc_acm_descriptor->bmCapabilities);
 221                         goto bad_desc;
 222         }
 223
 224         if (header.usb_cdc_ether_desc) {
 225                 dev->hard_mtu = le16_to_cpu(info->ether->wMaxSegmentSize);
 226                 /* because of Zaurus, we may be ignoring the host
 227                  * side link address we were given.
 228                  */
 229         }
 230
 231         if (header.usb_cdc_mdlm_desc &&
 232                 memcmp(header.usb_cdc_mdlm_desc->bGUID, mbm_guid, 16)) {
 233                 dev_dbg(&intf->dev, "GUID doesn't match\n");
 234                 goto bad_desc;
 235         }
 236
 237         if (header.usb_cdc_mdlm_detail_desc &&
 238                 header.usb_cdc_mdlm_detail_desc->bLength <
 239                         (sizeof(struct usb_cdc_mdlm_detail_desc) + 1)) {
 240                 dev_dbg(&intf->dev, "Descriptor too short\n");
 241                 goto bad_desc;
 242         }
 243
 244
 245
 246         /* Microsoft ActiveSync based and some regular RNDIS devices lack the
 247          * CDC descriptors, so we'll hard-wire the interfaces and not check
 248          * for descriptors.
 249          *
 250          * Some Android RNDIS devices have a CDC Union descriptor pointing
 251          * to non-existing interfaces.  Ignore that and attempt the same
 252          * hard-wired 0 and 1 interfaces.
 253          */
 254         if (rndis && (!info->u || android_rndis_quirk)) {
 255                 info->control = usb_ifnum_to_if(dev->udev, 0);
 256                 info->data = usb_ifnum_to_if(dev->udev, 1);
 257                 if (!info->control || !info->data || info->control != intf) {
 258                         dev_dbg(&intf->dev,
 259                                 "rndis: master #0/%p slave #1/%p\n",
 260                                 info->control,
 261                                 info->data);
 262                         goto bad_desc;
 263                 }
 264
 265         } else if (!info->header || (!rndis && !info->ether)) {
 266                 dev_dbg(&intf->dev, "missing cdc %s%s%sdescriptor\n",
 267                         info->header ? "" : "header ",
 268                         info->u ? "" : "union ",
 269                         info->ether ? "" : "ether ");
 270                 goto bad_desc;
 271         }
 272
 273         /* claim data interface and set it up ... with side effects.
 274          * network traffic can't flow until an altsetting is enabled.
 275          */
 276         if (info->data != info->control) {
 277                 status = usb_driver_claim_interface(driver, info->data, dev);
 278                 if (status < 0)
 279                         return status;
 280         }
 281         status = usbnet_get_endpoints(dev, info->data);
 282         if (status < 0) {
 283                 /* ensure immediate exit from usbnet_disconnect */
 284                 usb_set_intfdata(info->data, NULL);
 285                 if (info->data != info->control)
 286                         usb_driver_release_interface(driver, info->data);
 287                 return status;
 288         }
 289
 290         /* status endpoint: optional for CDC Ethernet, not RNDIS (or ACM) */
 291         if (info->data != info->control)
 292                 dev->status = NULL;
 293         if (info->control->cur_altsetting->desc.bNumEndpoints == 1) {
 294                 struct usb_endpoint_descriptor  *desc;
 295
 296                 dev->status = &info->control->cur_altsetting->endpoint [0];
 297                 desc = &dev->status->desc;
 298                 if (!usb_endpoint_is_int_in(desc) ||
 299                     (le16_to_cpu(desc->wMaxPacketSize)
 300                      < sizeof(struct usb_cdc_notification)) ||
 301                     !desc->bInterval) {
 302                         dev_dbg(&intf->dev, "bad notification endpoint\n");
 303                         dev->status = NULL;
 304                 }
 305         }
 306         if (rndis && !dev->status) {
 307                 dev_dbg(&intf->dev, "missing RNDIS status endpoint\n");
 308                 usb_set_intfdata(info->data, NULL);
 309                 usb_driver_release_interface(driver, info->data);
 310                 return -ENODEV;
 311         }
 312
 313         /* Some devices don't initialise properly. In particular
 314          * the packet filter is not reset. There are devices that
 315          * don't do reset all the way. So the packet filter should
 316          * be set to a sane initial value.
 317          */
 318         usbnet_cdc_update_filter(dev);
 319
 320         return 0;
 321
 322 bad_desc:
 323         dev_info(&dev->udev->dev, "bad CDC descriptors\n");
 324         return -ENODEV;
 325 }
 326 EXPORT_SYMBOL_GPL(usbnet_generic_cdc_bind);
 327
 328 void usbnet_cdc_unbind(struct usbnet *dev, struct usb_interface *intf)
 329 {
 330         struct cdc_state                *info = (void *) &dev->data;
 331         struct usb_driver               *driver = driver_of(intf);
 332
 333         /* combined interface - nothing  to do */
 334         if (info->data == info->control)
 335                 return;
 336
 337         /* disconnect master --> disconnect slave */
 338         if (intf == info->control && info->data) {
 339                 /* ensure immediate exit from usbnet_disconnect */
 340                 usb_set_intfdata(info->data, NULL);
 341                 usb_driver_release_interface(driver, info->data);
 342                 info->data = NULL;
 343         }
 344
 345         /* and vice versa (just in case) */
 346         else if (intf == info->data && info->control) {
 347                 /* ensure immediate exit from usbnet_disconnect */
 348                 usb_set_intfdata(info->control, NULL);
 349                 usb_driver_release_interface(driver, info->control);
 350                 info->control = NULL;
 351         }
 352 }
 353 EXPORT_SYMBOL_GPL(usbnet_cdc_unbind);
 354
 355 /* Communications Device Class, Ethernet Control model
 356  *
 357  * Takes two interfaces.  The DATA interface is inactive till an altsetting
 358  * is selected.  Configuration data includes class descriptors.  There's
 359  * an optional status endpoint on the control interface.
 360  *
 361  * This should interop with whatever the 2.4 "CDCEther.c" driver
 362  * (by Brad Hards) talked with, with more functionality.
 363  */
 364
 365 static void dumpspeed(struct usbnet *dev, __le32 *speeds)
 366 {
 367         netif_info(dev, timer, dev->net,
 368                    "link speeds: %u kbps up, %u kbps down\n",
 369                    __le32_to_cpu(speeds[0]) / 1000,
 370                    __le32_to_cpu(speeds[1]) / 1000);
 371 }
 372
 373 void usbnet_cdc_status(struct usbnet *dev, struct urb *urb)
 374 {
 375         struct usb_cdc_notification     *event;
 376
 377         if (urb->actual_length < sizeof(*event))
 378                 return;
 379
 380         /* SPEED_CHANGE can get split into two 8-byte packets */
 381         if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
 382                 dumpspeed(dev, (__le32 *) urb->transfer_buffer);
 383                 return;
 384         }
 385
 386         event = urb->transfer_buffer;
 387         switch (event->bNotificationType) {
 388         case USB_CDC_NOTIFY_NETWORK_CONNECTION:
 389                 netif_dbg(dev, timer, dev->net, "CDC: carrier %s\n",
 390                           event->wValue ? "on" : "off");
 391                 usbnet_link_change(dev, !!event->wValue, 0);
 392                 break;
 393         case USB_CDC_NOTIFY_SPEED_CHANGE:       /* tx/rx rates */
 394                 netif_dbg(dev, timer, dev->net, "CDC: speed change (len %d)\n",
 395                           urb->actual_length);
 396                 if (urb->actual_length != (sizeof(*event) + 8))
 397                         set_bit(EVENT_STS_SPLIT, &dev->flags);
 398                 else
 399                         dumpspeed(dev, (__le32 *) &event[1]);
 400                 break;
 401         /* USB_CDC_NOTIFY_RESPONSE_AVAILABLE can happen too (e.g. RNDIS),
 402          * but there are no standard formats for the response data.
 403          */
 404         default:
 405                 netdev_err(dev->net, "CDC: unexpected notification %02x!\n",
 406                            event->bNotificationType);
 407                 break;
 408         }
 409 }
 410 EXPORT_SYMBOL_GPL(usbnet_cdc_status);
 411
 412 int usbnet_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
 413 {
 414         int                             status;
 415         struct cdc_state                *info = (void *) &dev->data;
 416
 417         BUILD_BUG_ON((sizeof(((struct usbnet *)0)->data)
 418                         < sizeof(struct cdc_state)));
 419
 420         status = usbnet_generic_cdc_bind(dev, intf);
 421         if (status < 0)
 422                 return status;
 423
 424         status = usbnet_get_ethernet_addr(dev, info->ether->iMACAddress);
 425         if (status < 0) {
 426                 usb_set_intfdata(info->data, NULL);
 427                 usb_driver_release_interface(driver_of(intf), info->data);
 428                 return status;
 429         }
 430
 431         return 0;
 432 }
 433 EXPORT_SYMBOL_GPL(usbnet_cdc_bind);
 434
 435 static int usbnet_cdc_zte_bind(struct usbnet *dev, struct usb_interface *intf)
 436 {
 437         int status = usbnet_cdc_bind(dev, intf);
 438
 439         if (!status && (dev->net->dev_addr[0] & 0x02))
 440                 eth_hw_addr_random(dev->net);
 441
 442         return status;
 443 }
 444
 445 /* Make sure packets have correct destination MAC address
 446  *
 447  * A firmware bug observed on some devices (ZTE MF823/831/910) is that the
 448  * device sends packets with a static, bogus, random MAC address (event if
 449  * device MAC address has been updated). Always set MAC address to that of the
 450  * device.
 451  */
 452 static int usbnet_cdc_zte_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 453 {
 454         if (skb->len < ETH_HLEN || !(skb->data[0] & 0x02))
 455                 return 1;
 456
 457         skb_reset_mac_header(skb);
 458         ether_addr_copy(eth_hdr(skb)->h_dest, dev->net->dev_addr);
 459
 460         return 1;
 461 }
 462
 463 /* Ensure correct link state
 464  *
 465  * Some devices (ZTE MF823/831/910) export two carrier on notifications when
 466  * connected. This causes the link state to be incorrect. Work around this by
 467  * always setting the state to off, then on.
 468  */
 469 static void usbnet_cdc_zte_status(struct usbnet *dev, struct urb *urb)
 470 {
 471         struct usb_cdc_notification *event;
 472
 473         if (urb->actual_length < sizeof(*event))
 474                 return;
 475
 476         event = urb->transfer_buffer;
 477
 478         if (event->bNotificationType != USB_CDC_NOTIFY_NETWORK_CONNECTION) {
 479                 usbnet_cdc_status(dev, urb);
 480                 return;
 481         }
 482
 483         netif_dbg(dev, timer, dev->net, "CDC: carrier %s\n",
 484                   event->wValue ? "on" : "off");
 485
 486         if (event->wValue &&
 487             netif_carrier_ok(dev->net))
 488                 netif_carrier_off(dev->net);
 489
 490         usbnet_link_change(dev, !!event->wValue, 0);
 491 }
 492
 493 static const struct driver_info cdc_info = {
 494         .description =  "CDC Ethernet Device",
 495         .flags =        FLAG_ETHER | FLAG_POINTTOPOINT,
 496         .bind =         usbnet_cdc_bind,
 497         .unbind =       usbnet_cdc_unbind,
 498         .status =       usbnet_cdc_status,
 499         .set_rx_mode =  usbnet_cdc_update_filter,
 500         .manage_power = usbnet_manage_power,
 501 };
 502
 503 static const struct driver_info zte_cdc_info = {
 504         .description =  "ZTE CDC Ethernet Device",
 505         .flags =        FLAG_ETHER | FLAG_POINTTOPOINT,
 506         .bind =         usbnet_cdc_zte_bind,
 507         .unbind =       usbnet_cdc_unbind,
 508         .status =       usbnet_cdc_zte_status,
 509         .set_rx_mode =  usbnet_cdc_update_filter,
 510         .manage_power = usbnet_manage_power,
 511         .rx_fixup = usbnet_cdc_zte_rx_fixup,
 512 };
 513
 514 static const struct driver_info wwan_info = {
 515         .description =  "Mobile Broadband Network Device",
 516         .flags =        FLAG_WWAN,
 517         .bind =         usbnet_cdc_bind,
 518         .unbind =       usbnet_cdc_unbind,
 519         .status =       usbnet_cdc_status,
 520         .set_rx_mode =  usbnet_cdc_update_filter,
 521         .manage_power = usbnet_manage_power,
 522 };
 523
 524 /*-------------------------------------------------------------------------*/
 525
 526 #define HUAWEI_VENDOR_ID        0x12D1
 527 #define NOVATEL_VENDOR_ID       0x1410
 528 #define ZTE_VENDOR_ID           0x19D2
 529 #define DELL_VENDOR_ID          0x413C
 530 #define REALTEK_VENDOR_ID       0x0bda
 531 #define SAMSUNG_VENDOR_ID       0x04e8
 532 #define LENOVO_VENDOR_ID        0x17ef
 533 #define NVIDIA_VENDOR_ID        0x0955
 534 #define HP_VENDOR_ID            0x03f0
 535 #define MICROSOFT_VENDOR_ID     0x045e
 536
 537 static const struct usb_device_id       products[] = {
 538 /* BLACKLIST !!
 539  *
 540  * First blacklist any products that are egregiously nonconformant
 541  * with the CDC Ethernet specs.  Minor braindamage we cope with; when
 542  * they're not even trying, needing a separate driver is only the first
 543  * of the differences to show up.
 544  */
 545
 546 #define ZAURUS_MASTER_INTERFACE \
 547         .bInterfaceClass        = USB_CLASS_COMM, \
 548         .bInterfaceSubClass     = USB_CDC_SUBCLASS_ETHERNET, \
 549         .bInterfaceProtocol     = USB_CDC_PROTO_NONE
 550
 551 /* SA-1100 based Sharp Zaurus ("collie"), or compatible;
 552  * wire-incompatible with true CDC Ethernet implementations.
 553  * (And, it seems, needlessly so...)
 554  */
 555 {
 556         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 557                           | USB_DEVICE_ID_MATCH_DEVICE,
 558         .idVendor               = 0x04DD,
 559         .idProduct              = 0x8004,
 560         ZAURUS_MASTER_INTERFACE,
 561         .driver_info            = 0,
 562 },
 563
 564 /* PXA-25x based Sharp Zaurii.  Note that it seems some of these
 565  * (later models especially) may have shipped only with firmware
 566  * advertising false "CDC MDLM" compatibility ... but we're not
 567  * clear which models did that, so for now let's assume the worst.
 568  */
 569 {
 570         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 571                           | USB_DEVICE_ID_MATCH_DEVICE,
 572         .idVendor               = 0x04DD,
 573         .idProduct              = 0x8005,       /* A-300 */
 574         ZAURUS_MASTER_INTERFACE,
 575         .driver_info            = 0,
 576 }, {
 577         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 578                           | USB_DEVICE_ID_MATCH_DEVICE,
 579         .idVendor               = 0x04DD,
 580         .idProduct              = 0x8006,       /* B-500/SL-5600 */
 581         ZAURUS_MASTER_INTERFACE,
 582         .driver_info            = 0,
 583 }, {
 584         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 585                           | USB_DEVICE_ID_MATCH_DEVICE,
 586         .idVendor               = 0x04DD,
 587         .idProduct              = 0x8007,       /* C-700 */
 588         ZAURUS_MASTER_INTERFACE,
 589         .driver_info            = 0,
 590 }, {
 591         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 592                  | USB_DEVICE_ID_MATCH_DEVICE,
 593         .idVendor               = 0x04DD,
 594         .idProduct              = 0x9031,       /* C-750 C-760 */
 595         ZAURUS_MASTER_INTERFACE,
 596         .driver_info            = 0,
 597 }, {
 598         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 599                  | USB_DEVICE_ID_MATCH_DEVICE,
 600         .idVendor               = 0x04DD,
 601         .idProduct              = 0x9032,       /* SL-6000 */
 602         ZAURUS_MASTER_INTERFACE,
 603         .driver_info            = 0,
 604 }, {
 605         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 606                  | USB_DEVICE_ID_MATCH_DEVICE,
 607         .idVendor               = 0x04DD,
 608         /* reported with some C860 units */
 609         .idProduct              = 0x9050,       /* C-860 */
 610         ZAURUS_MASTER_INTERFACE,
 611         .driver_info            = 0,
 612 },
 613
 614 /* Olympus has some models with a Zaurus-compatible option.
 615  * R-1000 uses a FreeScale i.MXL cpu (ARMv4T)
 616  */
 617 {
 618         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 619                  | USB_DEVICE_ID_MATCH_DEVICE,
 620         .idVendor               = 0x07B4,
 621         .idProduct              = 0x0F02,       /* R-1000 */
 622         ZAURUS_MASTER_INTERFACE,
 623         .driver_info            = 0,
 624 },
 625
 626 /* LG Electronics VL600 wants additional headers on every frame */
 627 {
 628         USB_DEVICE_AND_INTERFACE_INFO(0x1004, 0x61aa, USB_CLASS_COMM,
 629                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 630         .driver_info = 0,
 631 },
 632
 633 /* Logitech Harmony 900 - uses the pseudo-MDLM (BLAN) driver */
 634 {
 635         USB_DEVICE_AND_INTERFACE_INFO(0x046d, 0xc11f, USB_CLASS_COMM,
 636                         USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
 637         .driver_info            = 0,
 638 },
 639
 640 /* Novatel USB551L and MC551 - handled by qmi_wwan */
 641 {
 642         USB_DEVICE_AND_INTERFACE_INFO(NOVATEL_VENDOR_ID, 0xB001, USB_CLASS_COMM,
 643                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 644         .driver_info = 0,
 645 },
 646
 647 /* Novatel E362 - handled by qmi_wwan */
 648 {
 649         USB_DEVICE_AND_INTERFACE_INFO(NOVATEL_VENDOR_ID, 0x9010, USB_CLASS_COMM,
 650                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 651         .driver_info = 0,
 652 },
 653
 654 /* Dell Wireless 5800 (Novatel E362) - handled by qmi_wwan */
 655 {
 656         USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x8195, USB_CLASS_COMM,
 657                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 658         .driver_info = 0,
 659 },
 660
 661 /* Dell Wireless 5800 (Novatel E362) - handled by qmi_wwan */
 662 {
 663         USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x8196, USB_CLASS_COMM,
 664                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 665         .driver_info = 0,
 666 },
 667
 668 /* Dell Wireless 5804 (Novatel E371) - handled by qmi_wwan */
 669 {
 670         USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x819b, USB_CLASS_COMM,
 671                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 672         .driver_info = 0,
 673 },
 674
 675 /* Novatel Expedite E371 - handled by qmi_wwan */
 676 {
 677         USB_DEVICE_AND_INTERFACE_INFO(NOVATEL_VENDOR_ID, 0x9011, USB_CLASS_COMM,
 678                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 679         .driver_info = 0,
 680 },
 681
 682 /* HP lt2523 (Novatel E371) - handled by qmi_wwan */
 683 {
 684         USB_DEVICE_AND_INTERFACE_INFO(HP_VENDOR_ID, 0x421d, USB_CLASS_COMM,
 685                                       USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 686         .driver_info = 0,
 687 },
 688
 689 /* AnyDATA ADU960S - handled by qmi_wwan */
 690 {
 691         USB_DEVICE_AND_INTERFACE_INFO(0x16d5, 0x650a, USB_CLASS_COMM,
 692                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 693         .driver_info = 0,
 694 },
 695
 696 /* Huawei E1820 - handled by qmi_wwan */
 697 {
 698         USB_DEVICE_INTERFACE_NUMBER(HUAWEI_VENDOR_ID, 0x14ac, 1),
 699         .driver_info = 0,
 700 },
 701
 702 /* Realtek RTL8152 Based USB 2.0 Ethernet Adapters */
 703 {
 704         USB_DEVICE_AND_INTERFACE_INFO(REALTEK_VENDOR_ID, 0x8152, USB_CLASS_COMM,
 705                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 706         .driver_info = 0,
 707 },
 708
 709 /* Realtek RTL8153 Based USB 3.0 Ethernet Adapters */
 710 {
 711         USB_DEVICE_AND_INTERFACE_INFO(REALTEK_VENDOR_ID, 0x8153, USB_CLASS_COMM,
 712                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 713         .driver_info = 0,
 714 },
 715
 716 /* Samsung USB Ethernet Adapters */
 717 {
 718         USB_DEVICE_AND_INTERFACE_INFO(SAMSUNG_VENDOR_ID, 0xa101, USB_CLASS_COMM,
 719                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 720         .driver_info = 0,
 721 },
 722
 723 /* ThinkPad USB-C Dock (based on Realtek RTL8153) */
 724 {
 725         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x3062, USB_CLASS_COMM,
 726                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 727         .driver_info = 0,
 728 },
 729
 730 /* ThinkPad Thunderbolt 3 Dock (based on Realtek RTL8153) */
 731 {
 732         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x3069, USB_CLASS_COMM,
 733                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 734         .driver_info = 0,
 735 },
 736
 737 /* Lenovo Thinkpad USB 3.0 Ethernet Adapters (based on Realtek RTL8153) */
 738 {
 739         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x7205, USB_CLASS_COMM,
 740                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 741         .driver_info = 0,
 742 },
 743
 744 /* Lenovo USB C to Ethernet Adapter (based on Realtek RTL8153) */
 745 {
 746         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x720c, USB_CLASS_COMM,
 747                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 748         .driver_info = 0,
 749 },
 750
 751 /* Lenovo USB-C Travel Hub (based on Realtek RTL8153) */
 752 {
 753         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x7214, USB_CLASS_COMM,
 754                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 755         .driver_info = 0,
 756 },
 757
 758 /* NVIDIA Tegra USB 3.0 Ethernet Adapters (based on Realtek RTL8153) */
 759 {
 760         USB_DEVICE_AND_INTERFACE_INFO(NVIDIA_VENDOR_ID, 0x09ff, USB_CLASS_COMM,
 761                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 762         .driver_info = 0,
 763 },
 764
 765 /* Microsoft Surface 2 dock (based on Realtek RTL8152) */
 766 {
 767         USB_DEVICE_AND_INTERFACE_INFO(MICROSOFT_VENDOR_ID, 0x07ab, USB_CLASS_COMM,
 768                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 769         .driver_info = 0,
 770 },
 771
 772 /* Microsoft Surface 3 dock (based on Realtek RTL8153) */
 773 {
 774         USB_DEVICE_AND_INTERFACE_INFO(MICROSOFT_VENDOR_ID, 0x07c6, USB_CLASS_COMM,
 775                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 776         .driver_info = 0,
 777 },
 778
 779 /* WHITELIST!!!
 780  *
 781  * CDC Ether uses two interfaces, not necessarily consecutive.
 782  * We match the main interface, ignoring the optional device
 783  * class so we could handle devices that aren't exclusively
 784  * CDC ether.
 785  *
 786  * NOTE:  this match must come AFTER entries blacklisting devices
 787  * because of bugs/quirks in a given product (like Zaurus, above).
 788  */
 789 {
 790         /* ZTE (Vodafone) K3805-Z */
 791         USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1003, USB_CLASS_COMM,
 792                                       USB_CDC_SUBCLASS_ETHERNET,
 793                                       USB_CDC_PROTO_NONE),
 794         .driver_info = (unsigned long)&wwan_info,
 795 }, {
 796         /* ZTE (Vodafone) K3806-Z */
 797         USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1015, USB_CLASS_COMM,
 798                                       USB_CDC_SUBCLASS_ETHERNET,
 799                                       USB_CDC_PROTO_NONE),
 800         .driver_info = (unsigned long)&wwan_info,
 801 }, {
 802         /* ZTE (Vodafone) K4510-Z */
 803         USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1173, USB_CLASS_COMM,
 804                                       USB_CDC_SUBCLASS_ETHERNET,
 805                                       USB_CDC_PROTO_NONE),
 806         .driver_info = (unsigned long)&wwan_info,
 807 }, {
 808         /* ZTE (Vodafone) K3770-Z */
 809         USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1177, USB_CLASS_COMM,
 810                                       USB_CDC_SUBCLASS_ETHERNET,
 811                                       USB_CDC_PROTO_NONE),
 812         .driver_info = (unsigned long)&wwan_info,
 813 }, {
 814         /* ZTE (Vodafone) K3772-Z */
 815         USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1181, USB_CLASS_COMM,
 816                                       USB_CDC_SUBCLASS_ETHERNET,
 817                                       USB_CDC_PROTO_NONE),
 818         .driver_info = (unsigned long)&wwan_info,
 819 }, {
 820         /* Telit modules */
 821         USB_VENDOR_AND_INTERFACE_INFO(0x1bc7, USB_CLASS_COMM,
 822                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 823         .driver_info = (kernel_ulong_t) &wwan_info,
 824 }, {
 825         /* Dell DW5580 modules */
 826         USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x81ba, USB_CLASS_COMM,
 827                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 828         .driver_info = (kernel_ulong_t)&wwan_info,
 829 }, {
 830         /* ZTE modules */
 831         USB_VENDOR_AND_INTERFACE_INFO(ZTE_VENDOR_ID, USB_CLASS_COMM,
 832                                       USB_CDC_SUBCLASS_ETHERNET,
 833                                       USB_CDC_PROTO_NONE),
 834         .driver_info = (unsigned long)&zte_cdc_info,
 835 }, {
 836         USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ETHERNET,
 837                         USB_CDC_PROTO_NONE),
 838         .driver_info = (unsigned long) &cdc_info,
 839 }, {
 840         USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_MDLM,
 841                         USB_CDC_PROTO_NONE),
 842         .driver_info = (unsigned long)&wwan_info,
 843
 844 }, {
 845         /* Various Huawei modems with a network port like the UMG1831 */
 846         USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_COMM,
 847                                       USB_CDC_SUBCLASS_ETHERNET, 255),
 848         .driver_info = (unsigned long)&wwan_info,
 849 },
 850         { },            /* END */
 851 };
 852 MODULE_DEVICE_TABLE(usb, products);
 853
 854 static struct usb_driver cdc_driver = {
 855         .name =         "cdc_ether",
 856         .id_table =     products,
 857         .probe =        usbnet_probe,
 858         .disconnect =   usbnet_disconnect,
 859         .suspend =      usbnet_suspend,
 860         .resume =       usbnet_resume,
 861         .reset_resume = usbnet_resume,
 862         .supports_autosuspend = 1,
 863         .disable_hub_initiated_lpm = 1,
 864 };
 865
 866 module_usb_driver(cdc_driver);
 867
 868 MODULE_AUTHOR("David Brownell");
 869 MODULE_DESCRIPTION("USB CDC Ethernet devices");
 870 MODULE_LICENSE("GPL");