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