release/src-rt/linux/linux-2.6/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, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 // #define      DEBUG                   // error path messages, extra info
  22 // #define      VERBOSE                 // more; success messages
  23
  24 #include <linux/module.h>
  25 #include <linux/init.h>
  26 #include <linux/netdevice.h>
  27 #include <linux/etherdevice.h>
  28 #include <linux/ethtool.h>
  29 #include <linux/workqueue.h>
  30 #include <linux/mii.h>
  31 #include <linux/usb.h>
  32 #include <linux/usb/cdc.h>
  33
  34 #include "usbnet.h"
  35
  36
  37 #if defined(CONFIG_USB_NET_RNDIS_HOST) || defined(CONFIG_USB_NET_RNDIS_HOST_MODULE)
  38
  39 static int is_rndis(struct usb_interface_descriptor *desc)
  40 {
  41         return desc->bInterfaceClass == USB_CLASS_COMM
  42                 && desc->bInterfaceSubClass == 2
  43                 && desc->bInterfaceProtocol == 0xff;
  44 }
  45
  46 static int is_activesync(struct usb_interface_descriptor *desc)
  47 {
  48         return desc->bInterfaceClass == USB_CLASS_MISC
  49                 && desc->bInterfaceSubClass == 1
  50                 && desc->bInterfaceProtocol == 1;
  51 }
  52
  53 static int is_wireless_rndis(struct usb_interface_descriptor *desc)
  54 {
  55         return desc->bInterfaceClass == USB_CLASS_WIRELESS_CONTROLLER
  56                 && desc->bInterfaceSubClass == 1
  57                 && desc->bInterfaceProtocol == 3;
  58 }
  59
  60 #else
  61
  62 #define is_rndis(desc)          0
  63 #define is_activesync(desc)     0
  64 #define is_wireless_rndis(desc) 0
  65
  66 #endif
  67
  68 static const u8 mbm_guid[16] = {
  69         0xa3, 0x17, 0xa8, 0x8b, 0x04, 0x5e, 0x4f, 0x01,
  70         0xa6, 0x07, 0xc0, 0xff, 0xcb, 0x7e, 0x39, 0x2a,
  71 };
  72
  73 /*
  74  * probes control interface, claims data interface, collects the bulk
  75  * endpoints, activates data interface (if needed), maybe sets MTU.
  76  * all pure cdc, except for certain firmware workarounds, and knowing
  77  * that rndis uses one different rule.
  78  */
  79 int usbnet_generic_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
  80 {
  81         u8                              *buf = intf->cur_altsetting->extra;
  82         int                             len = intf->cur_altsetting->extralen;
  83         struct usb_interface_descriptor *d;
  84         struct cdc_state                *info = (void *) &dev->data;
  85         int                             status;
  86         int                             rndis;
  87         bool                            android_rndis_quirk = false;
  88         struct usb_driver               *driver = driver_of(intf);
  89         struct usb_cdc_mdlm_desc        *desc = NULL;
  90         struct usb_cdc_mdlm_detail_desc *detail = NULL;
  91
  92         if (sizeof dev->data < sizeof *info)
  93                 return -EDOM;
  94
  95         /* expect strict spec conformance for the descriptors, but
  96          * cope with firmware which stores them in the wrong place
  97          */
  98         if (len == 0 && dev->udev->actconfig->extralen) {
  99                 /* Motorola SB4100 (and others: Brad Hards says it's
 100                  * from a Broadcom design) put CDC descriptors here
 101                  */
 102                 buf = dev->udev->actconfig->extra;
 103                 len = dev->udev->actconfig->extralen;
 104                 if (len)
 105                         dev_dbg(&intf->dev,
 106                                 "CDC descriptors on config\n");
 107         }
 108
 109         /* Maybe CDC descriptors are after the endpoint?  This bug has
 110          * been seen on some 2Wire Inc RNDIS-ish products.
 111          */
 112         if (len == 0) {
 113                 struct usb_host_endpoint        *hep;
 114
 115                 hep = intf->cur_altsetting->endpoint;
 116                 if (hep) {
 117                         buf = hep->extra;
 118                         len = hep->extralen;
 119                 }
 120                 if (len)
 121                         dev_dbg(&intf->dev,
 122                                 "CDC descriptors on endpoint\n");
 123         }
 124
 125         /* this assumes that if there's a non-RNDIS vendor variant
 126          * of cdc-acm, it'll fail RNDIS requests cleanly.
 127          */
 128         rndis = is_rndis(&intf->cur_altsetting->desc)
 129                 || is_activesync(&intf->cur_altsetting->desc)
 130                 || is_wireless_rndis(&intf->cur_altsetting->desc);
 131
 132         memset(info, 0, sizeof *info);
 133         info->control = intf;
 134         while (len > 3) {
 135                 if (buf [1] != USB_DT_CS_INTERFACE)
 136                         goto next_desc;
 137
 138                 /* use bDescriptorSubType to identify the CDC descriptors.
 139                  * We expect devices with CDC header and union descriptors.
 140                  * For CDC Ethernet we need the ethernet descriptor.
 141                  * For RNDIS, ignore two (pointless) CDC modem descriptors
 142                  * in favor of a complicated OID-based RPC scheme doing what
 143                  * CDC Ethernet achieves with a simple descriptor.
 144                  */
 145                 switch (buf [2]) {
 146                 case USB_CDC_HEADER_TYPE:
 147                         if (info->header) {
 148                                 dev_dbg(&intf->dev, "extra CDC header\n");
 149                                 goto bad_desc;
 150                         }
 151                         info->header = (void *) buf;
 152                         if (info->header->bLength != sizeof *info->header) {
 153                                 dev_dbg(&intf->dev, "CDC header len %u\n",
 154                                         info->header->bLength);
 155                                 goto bad_desc;
 156                         }
 157                         break;
 158                 case USB_CDC_ACM_TYPE:
 159                         /* paranoia:  disambiguate a "real" vendor-specific
 160                          * modem interface from an RNDIS non-modem.
 161                          */
 162                         if (rndis) {
 163                                 struct usb_cdc_acm_descriptor *acm;
 164
 165                                 acm = (void *) buf;
 166                                 if (acm->bmCapabilities) {
 167                                         dev_dbg(&intf->dev,
 168                                                 "ACM capabilities %02x, "
 169                                                 "not really RNDIS?\n",
 170                                                 acm->bmCapabilities);
 171                                         goto bad_desc;
 172                                 }
 173                         }
 174                         break;
 175                 case USB_CDC_UNION_TYPE:
 176                         if (info->u) {
 177                                 dev_dbg(&intf->dev, "extra CDC union\n");
 178                                 goto bad_desc;
 179                         }
 180                         info->u = (void *) buf;
 181                         if (info->u->bLength != sizeof *info->u) {
 182                                 dev_dbg(&intf->dev, "CDC union len %u\n",
 183                                         info->u->bLength);
 184                                 goto bad_desc;
 185                         }
 186
 187                         /* we need a master/control interface (what we're
 188                          * probed with) and a slave/data interface; union
 189                          * descriptors sort this all out.
 190                          */
 191                         info->control = usb_ifnum_to_if(dev->udev,
 192                                                 info->u->bMasterInterface0);
 193                         info->data = usb_ifnum_to_if(dev->udev,
 194                                                 info->u->bSlaveInterface0);
 195                         if (!info->control || !info->data) {
 196                                 dev_dbg(&intf->dev,
 197                                         "master #%u/%p slave #%u/%p\n",
 198                                         info->u->bMasterInterface0,
 199                                         info->control,
 200                                         info->u->bSlaveInterface0,
 201                                         info->data);
 202                                 /* fall back to hard-wiring for RNDIS */
 203                                 if (rndis) {
 204                                         android_rndis_quirk = true;
 205                                         goto next_desc;
 206                                 }
 207                                 goto bad_desc;
 208                         }
 209                         if (info->control != intf) {
 210                                 dev_dbg(&intf->dev, "bogus CDC Union\n");
 211                                 /* Ambit USB Cable Modem (and maybe others)
 212                                  * interchanges master and slave interface.
 213                                  */
 214                                 if (info->data == intf) {
 215                                         info->data = info->control;
 216                                         info->control = intf;
 217                                 } else
 218                                         goto bad_desc;
 219                         }
 220
 221                         /* some devices merge these - skip class check */
 222                         if (info->control == info->data)
 223                                 goto next_desc;
 224
 225                         /* a data interface altsetting does the real i/o */
 226                         d = &info->data->cur_altsetting->desc;
 227                         if (d->bInterfaceClass != USB_CLASS_CDC_DATA) {
 228                                 dev_dbg(&intf->dev, "slave class %u\n",
 229                                         d->bInterfaceClass);
 230                                 goto bad_desc;
 231                         }
 232                         break;
 233                 case USB_CDC_ETHERNET_TYPE:
 234                         if (info->ether) {
 235                                 dev_dbg(&intf->dev, "extra CDC ether\n");
 236                                 goto bad_desc;
 237                         }
 238                         info->ether = (void *) buf;
 239                         if (info->ether->bLength != sizeof *info->ether) {
 240                                 dev_dbg(&intf->dev, "CDC ether len %u\n",
 241                                         info->ether->bLength);
 242                                 goto bad_desc;
 243                         }
 244                         dev->hard_mtu = le16_to_cpu(
 245                                                 info->ether->wMaxSegmentSize);
 246                         /* because of Zaurus, we may be ignoring the host
 247                          * side link address we were given.
 248                          */
 249                         break;
 250                 case USB_CDC_MDLM_TYPE:
 251                         if (desc) {
 252                                 dev_dbg(&intf->dev, "extra MDLM descriptor\n");
 253                                 goto bad_desc;
 254                         }
 255
 256                         desc = (void *)buf;
 257
 258                         if (desc->bLength != sizeof(*desc))
 259                                 goto bad_desc;
 260
 261                         if (memcmp(&desc->bGUID, mbm_guid, 16))
 262                                 goto bad_desc;
 263                         break;
 264                 case USB_CDC_MDLM_DETAIL_TYPE:
 265                         if (detail) {
 266                                 dev_dbg(&intf->dev, "extra MDLM detail descriptor\n");
 267                                 goto bad_desc;
 268                         }
 269
 270                         detail = (void *)buf;
 271
 272                         if (detail->bGuidDescriptorType == 0) {
 273                                 if (detail->bLength < (sizeof(*detail) + 1))
 274                                         goto bad_desc;
 275                         } else
 276                                 goto bad_desc;
 277                         break;
 278                 }
 279 next_desc:
 280                 len -= buf [0]; /* bLength */
 281                 buf += buf [0];
 282         }
 283
 284         /* Microsoft ActiveSync based and some regular RNDIS devices lack the
 285          * CDC descriptors, so we'll hard-wire the interfaces and not check
 286          * for descriptors.
 287          *
 288          * Some Android RNDIS devices have a CDC Union descriptor pointing
 289          * to non-existing interfaces.  Ignore that and attempt the same
 290          * hard-wired 0 and 1 interfaces.
 291          */
 292         if (rndis && (!info->u || android_rndis_quirk)) {
 293                 info->control = usb_ifnum_to_if(dev->udev, 0);
 294                 info->data = usb_ifnum_to_if(dev->udev, 1);
 295                 if (!info->control || !info->data || info->control != intf) {
 296                         dev_dbg(&intf->dev,
 297                                 "rndis: master #0/%p slave #1/%p\n",
 298                                 info->control,
 299                                 info->data);
 300                         goto bad_desc;
 301                 }
 302
 303         } else if (!info->header || !info->u || (!rndis && !info->ether)) {
 304                 dev_dbg(&intf->dev, "missing cdc %s%s%sdescriptor\n",
 305                         info->header ? "" : "header ",
 306                         info->u ? "" : "union ",
 307                         info->ether ? "" : "ether ");
 308                 goto bad_desc;
 309         }
 310
 311         /* claim data interface and set it up ... with side effects.
 312          * network traffic can't flow until an altsetting is enabled.
 313          */
 314         if (info->data != info->control) {
 315                 status = usb_driver_claim_interface(driver, info->data, dev);
 316                 if (status < 0)
 317                         return status;
 318         }
 319         status = usbnet_get_endpoints(dev, info->data);
 320         if (status < 0) {
 321                 /* ensure immediate exit from usbnet_disconnect */
 322                 usb_set_intfdata(info->data, NULL);
 323                 if (info->data != info->control)
 324                         usb_driver_release_interface(driver, info->data);
 325                 return status;
 326         }
 327
 328         /* status endpoint: optional for CDC Ethernet, not RNDIS (or ACM) */
 329         if (info->data != info->control)
 330                 dev->status = NULL;
 331         if (info->control->cur_altsetting->desc.bNumEndpoints == 1) {
 332                 struct usb_endpoint_descriptor  *desc;
 333
 334                 dev->status = &info->control->cur_altsetting->endpoint [0];
 335                 desc = &dev->status->desc;
 336                 if (!usb_endpoint_is_int_in(desc)
 337                                 || (le16_to_cpu(desc->wMaxPacketSize)
 338                                         < sizeof(struct usb_cdc_notification))
 339                                 || !desc->bInterval) {
 340                         dev_dbg(&intf->dev, "bad notification endpoint\n");
 341                         dev->status = NULL;
 342                 }
 343         }
 344         if (rndis && !dev->status) {
 345                 dev_dbg(&intf->dev, "missing RNDIS status endpoint\n");
 346                 usb_set_intfdata(info->data, NULL);
 347                 usb_driver_release_interface(driver, info->data);
 348                 return -ENODEV;
 349         }
 350         return 0;
 351
 352 bad_desc:
 353         dev_info(&dev->udev->dev, "bad CDC descriptors\n");
 354         return -ENODEV;
 355 }
 356 EXPORT_SYMBOL_GPL(usbnet_generic_cdc_bind);
 357
 358 void usbnet_cdc_unbind(struct usbnet *dev, struct usb_interface *intf)
 359 {
 360         struct cdc_state                *info = (void *) &dev->data;
 361         struct usb_driver               *driver = driver_of(intf);
 362
 363         /* combined interface - nothing  to do */
 364         if (info->data == info->control)
 365                 return;
 366
 367         /* disconnect master --> disconnect slave */
 368         if (intf == info->control && info->data) {
 369                 /* ensure immediate exit from usbnet_disconnect */
 370                 usb_set_intfdata(info->data, NULL);
 371                 usb_driver_release_interface(driver, info->data);
 372                 info->data = NULL;
 373         }
 374
 375         /* and vice versa (just in case) */
 376         else if (intf == info->data && info->control) {
 377                 /* ensure immediate exit from usbnet_disconnect */
 378                 usb_set_intfdata(info->control, NULL);
 379                 usb_driver_release_interface(driver, info->control);
 380                 info->control = NULL;
 381         }
 382 }
 383 EXPORT_SYMBOL_GPL(usbnet_cdc_unbind);
 384
 385 /*-------------------------------------------------------------------------
 386  *
 387  * Communications Device Class, Ethernet Control model
 388  *
 389  * Takes two interfaces.  The DATA interface is inactive till an altsetting
 390  * is selected.  Configuration data includes class descriptors.  There's
 391  * an optional status endpoint on the control interface.
 392  *
 393  * This should interop with whatever the 2.4 "CDCEther.c" driver
 394  * (by Brad Hards) talked with, with more functionality.
 395  *
 396  *-------------------------------------------------------------------------*/
 397
 398 static void dumpspeed(struct usbnet *dev, __le32 *speeds)
 399 {
 400         if (netif_msg_timer(dev))
 401                 devinfo(dev, "link speeds: %u kbps up, %u kbps down",
 402                         __le32_to_cpu(speeds[0]) / 1000,
 403                 __le32_to_cpu(speeds[1]) / 1000);
 404 }
 405
 406 static void cdc_status(struct usbnet *dev, struct urb *urb)
 407 {
 408         struct usb_cdc_notification     *event;
 409
 410         if (urb->actual_length < sizeof *event)
 411                 return;
 412
 413         /* SPEED_CHANGE can get split into two 8-byte packets */
 414         if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
 415                 dumpspeed(dev, (__le32 *) urb->transfer_buffer);
 416                 return;
 417         }
 418
 419         event = urb->transfer_buffer;
 420         switch (event->bNotificationType) {
 421         case USB_CDC_NOTIFY_NETWORK_CONNECTION:
 422                 if (netif_msg_timer(dev))
 423                         devdbg(dev, "CDC: carrier %s",
 424                                         event->wValue ? "on" : "off");
 425                 if (event->wValue)
 426                         netif_carrier_on(dev->net);
 427                 else
 428                         netif_carrier_off(dev->net);
 429                 break;
 430         case USB_CDC_NOTIFY_SPEED_CHANGE:       /* tx/rx rates */
 431                 if (netif_msg_timer(dev))
 432                         devdbg(dev, "CDC: speed change (len %d)",
 433                                         urb->actual_length);
 434                 if (urb->actual_length != (sizeof *event + 8))
 435                         set_bit(EVENT_STS_SPLIT, &dev->flags);
 436                 else
 437                         dumpspeed(dev, (__le32 *) &event[1]);
 438                 break;
 439         /* USB_CDC_NOTIFY_RESPONSE_AVAILABLE can happen too (e.g. RNDIS),
 440          * but there are no standard formats for the response data.
 441          */
 442         default:
 443                 deverr(dev, "CDC: unexpected notification %02x!",
 444                                  event->bNotificationType);
 445                 break;
 446         }
 447 }
 448
 449 static int cdc_bind(struct usbnet *dev, struct usb_interface *intf)
 450 {
 451         int                             status;
 452         struct cdc_state                *info = (void *) &dev->data;
 453
 454         status = usbnet_generic_cdc_bind(dev, intf);
 455         if (status < 0)
 456                 return status;
 457
 458         status = usbnet_get_ethernet_addr(dev, info->ether->iMACAddress);
 459         if (status < 0) {
 460                 usb_set_intfdata(info->data, NULL);
 461                 usb_driver_release_interface(driver_of(intf), info->data);
 462                 return status;
 463         }
 464
 465         /* FIXME cdc-ether has some multicast code too, though it complains
 466          * in routine cases.  info->ether describes the multicast support.
 467          * Implement that here, manipulating the cdc filter as needed.
 468          */
 469         return 0;
 470 }
 471
 472 static const struct driver_info cdc_info = {
 473         .description =  "CDC Ethernet Device",
 474         .flags =        FLAG_ETHER,
 475         // .check_connect = cdc_check_connect,
 476         .bind =         cdc_bind,
 477         .unbind =       usbnet_cdc_unbind,
 478         .status =       cdc_status,
 479 };
 480
 481 /*-------------------------------------------------------------------------*/
 482
 483 #define HUAWEI_VENDOR_ID        0x12D1
 484 #define NOVATEL_VENDOR_ID       0x1410
 485 #define DELL_VENDOR_ID          0x413C
 486
 487 static const struct usb_device_id       products [] = {
 488 /*
 489  * BLACKLIST !!
 490  *
 491  * First blacklist any products that are egregiously nonconformant
 492  * with the CDC Ethernet specs.  Minor braindamage we cope with; when
 493  * they're not even trying, needing a separate driver is only the first
 494  * of the differences to show up.
 495  */
 496
 497 #define ZAURUS_MASTER_INTERFACE \
 498         .bInterfaceClass        = USB_CLASS_COMM, \
 499         .bInterfaceSubClass     = USB_CDC_SUBCLASS_ETHERNET, \
 500         .bInterfaceProtocol     = USB_CDC_PROTO_NONE
 501
 502 /* SA-1100 based Sharp Zaurus ("collie"), or compatible;
 503  * wire-incompatible with true CDC Ethernet implementations.
 504  * (And, it seems, needlessly so...)
 505  */
 506 {
 507         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 508                           | USB_DEVICE_ID_MATCH_DEVICE,
 509         .idVendor               = 0x04DD,
 510         .idProduct              = 0x8004,
 511         ZAURUS_MASTER_INTERFACE,
 512         .driver_info            = 0,
 513 },
 514
 515 /* PXA-25x based Sharp Zaurii.  Note that it seems some of these
 516  * (later models especially) may have shipped only with firmware
 517  * advertising false "CDC MDLM" compatibility ... but we're not
 518  * clear which models did that, so for now let's assume the worst.
 519  */
 520 {
 521         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 522                           | USB_DEVICE_ID_MATCH_DEVICE,
 523         .idVendor               = 0x04DD,
 524         .idProduct              = 0x8005,       /* A-300 */
 525         ZAURUS_MASTER_INTERFACE,
 526         .driver_info            = 0,
 527 }, {
 528         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 529                           | USB_DEVICE_ID_MATCH_DEVICE,
 530         .idVendor               = 0x04DD,
 531         .idProduct              = 0x8006,       /* B-500/SL-5600 */
 532         ZAURUS_MASTER_INTERFACE,
 533         .driver_info            = 0,
 534 }, {
 535         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 536                   | USB_DEVICE_ID_MATCH_DEVICE,
 537         .idVendor               = 0x04DD,
 538         .idProduct              = 0x8007,       /* C-700 */
 539         ZAURUS_MASTER_INTERFACE,
 540         .driver_info            = 0,
 541 }, {
 542         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 543                  | USB_DEVICE_ID_MATCH_DEVICE,
 544         .idVendor               = 0x04DD,
 545         .idProduct              = 0x9031,       /* C-750 C-760 */
 546         ZAURUS_MASTER_INTERFACE,
 547         .driver_info            = 0,
 548 }, {
 549         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 550                  | USB_DEVICE_ID_MATCH_DEVICE,
 551         .idVendor               = 0x04DD,
 552         .idProduct              = 0x9032,       /* SL-6000 */
 553         ZAURUS_MASTER_INTERFACE,
 554         .driver_info            = 0,
 555 }, {
 556         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 557                  | USB_DEVICE_ID_MATCH_DEVICE,
 558         .idVendor               = 0x04DD,
 559         /* reported with some C860 units */
 560         .idProduct              = 0x9050,       /* C-860 */
 561         ZAURUS_MASTER_INTERFACE,
 562         .driver_info            = 0,
 563 },
 564
 565 /* Olympus has some models with a Zaurus-compatible option.
 566  * R-1000 uses a FreeScale i.MXL cpu (ARMv4T)
 567  */
 568 {
 569         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 570                  | USB_DEVICE_ID_MATCH_DEVICE,
 571         .idVendor               = 0x07B4,
 572         .idProduct              = 0x0F02,       /* R-1000 */
 573         ZAURUS_MASTER_INTERFACE,
 574         .driver_info            = 0,
 575 },
 576
 577 /* Novatel USB551L and MC551 - handled by qmi_wwan */
 578 {
 579         USB_DEVICE_AND_INTERFACE_INFO(NOVATEL_VENDOR_ID, 0xB001, USB_CLASS_COMM,
 580                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 581         .driver_info = 0,
 582 },
 583
 584 /* Novatel E362 - handled by qmi_wwan */
 585 {
 586         USB_DEVICE_AND_INTERFACE_INFO(NOVATEL_VENDOR_ID, 0x9010, USB_CLASS_COMM,
 587                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 588         .driver_info = 0,
 589 },
 590
 591 /* Dell Wireless 5800 (Novatel E362) - handled by qmi_wwan */
 592 {
 593         USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x8195, USB_CLASS_COMM,
 594                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 595         .driver_info = 0,
 596 },
 597
 598 /* Dell Wireless 5800 (Novatel E362) - handled by qmi_wwan */
 599 {
 600         USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x8196, USB_CLASS_COMM,
 601                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 602         .driver_info = 0,
 603 },
 604
 605 /*
 606  * WHITELIST!!!
 607  *
 608  * CDC Ether uses two interfaces, not necessarily consecutive.
 609  * We match the main interface, ignoring the optional device
 610  * class so we could handle devices that aren't exclusively
 611  * CDC ether.
 612  *
 613  * NOTE:  this match must come AFTER entries blacklisting devices
 614  * because of bugs/quirks in a given product (like Zaurus, above).
 615  */
 616 {
 617         USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ETHERNET,
 618                         USB_CDC_PROTO_NONE),
 619         .driver_info = (unsigned long) &cdc_info,
 620 }, {
 621         USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_MDLM,
 622                         USB_CDC_PROTO_NONE),
 623         .driver_info = (unsigned long) &cdc_info,
 624 }, {
 625         /* Various Huawei modems with a network port like the UMG1831 */
 626         USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_COMM,
 627                                 USB_CDC_SUBCLASS_ETHERNET, 255),
 628         .driver_info = (unsigned long) &cdc_info,
 629 },
 630         { },            // END
 631 };
 632 MODULE_DEVICE_TABLE(usb, products);
 633
 634 static struct usb_driver cdc_driver = {
 635         .name =         "cdc_ether",
 636         .id_table =     products,
 637         .probe =        usbnet_probe,
 638         .disconnect =   usbnet_disconnect,
 639         .suspend =      usbnet_suspend,
 640         .resume =       usbnet_resume,
 641         .reset_resume = usbnet_resume,
 642 };
 643
 644
 645 static int __init cdc_init(void)
 646 {
 647         BUILD_BUG_ON((sizeof(((struct usbnet *)0)->data)
 648                         < sizeof(struct cdc_state)));
 649
 650         return usb_register(&cdc_driver);
 651 }
 652 module_init(cdc_init);
 653
 654 static void __exit cdc_exit(void)
 655 {
 656         usb_deregister(&cdc_driver);
 657 }
 658 module_exit(cdc_exit);
 659
 660 MODULE_AUTHOR("David Brownell");
 661 MODULE_DESCRIPTION("USB CDC Ethernet devices");
 662 MODULE_LICENSE("GPL");