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 #include <linux/usb/usbnet.h>
  34
  35
  36 #if defined(CONFIG_USB_NET_RNDIS_HOST) || defined(CONFIG_USB_NET_RNDIS_HOST_MODULE)
  37
  38 static int is_rndis(struct usb_interface_descriptor *desc)
  39 {
  40         return (desc->bInterfaceClass == USB_CLASS_COMM &&
  41                 desc->bInterfaceSubClass == 2 &&
  42                 desc->bInterfaceProtocol == 0xff);
  43 }
  44
  45 static int is_activesync(struct usb_interface_descriptor *desc)
  46 {
  47         return (desc->bInterfaceClass == USB_CLASS_MISC &&
  48                 desc->bInterfaceSubClass == 1 &&
  49                 desc->bInterfaceProtocol == 1);
  50 }
  51
  52 static int is_wireless_rndis(struct usb_interface_descriptor *desc)
  53 {
  54         return (desc->bInterfaceClass == USB_CLASS_WIRELESS_CONTROLLER &&
  55                 desc->bInterfaceSubClass == 1 &&
  56                 desc->bInterfaceProtocol == 3);
  57 }
  58
  59 #else
  60
  61 #define is_rndis(desc)          0
  62 #define is_activesync(desc)     0
  63 #define is_wireless_rndis(desc) 0
  64
  65 #endif
  66
  67 static const u8 mbm_guid[16] = {
  68         0xa3, 0x17, 0xa8, 0x8b, 0x04, 0x5e, 0x4f, 0x01,
  69         0xa6, 0x07, 0xc0, 0xff, 0xcb, 0x7e, 0x39, 0x2a,
  70 };
  71
  72 /*
  73  * probes control interface, claims data interface, collects the bulk
  74  * endpoints, activates data interface (if needed), maybe sets MTU.
  75  * all pure cdc, except for certain firmware workarounds, and knowing
  76  * that rndis uses one different rule.
  77  */
  78 int usbnet_generic_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
  79 {
  80         u8                              *buf = intf->cur_altsetting->extra;
  81         int                             len = intf->cur_altsetting->extralen;
  82         struct usb_interface_descriptor *d;
  83         struct cdc_state                *info = (void *) &dev->data;
  84         int                             status;
  85         int                             rndis;
  86         bool                            android_rndis_quirk = false;
  87         struct usb_driver               *driver = driver_of(intf);
  88         struct usb_cdc_mdlm_desc        *desc = NULL;
  89         struct usb_cdc_mdlm_detail_desc *detail = NULL;
  90
  91         if (sizeof dev->data < sizeof *info)
  92                 return -EDOM;
  93
  94         /* expect strict spec conformance for the descriptors, but
  95          * cope with firmware which stores them in the wrong place
  96          */
  97         if (len == 0 && dev->udev->actconfig->extralen) {
  98                 /* Motorola SB4100 (and others: Brad Hards says it's
  99                  * from a Broadcom design) put CDC descriptors here
 100                  */
 101                 buf = dev->udev->actconfig->extra;
 102                 len = dev->udev->actconfig->extralen;
 103                 dev_dbg(&intf->dev, "CDC descriptors on config\n");
 104         }
 105
 106         /* Maybe CDC descriptors are after the endpoint?  This bug has
 107          * been seen on some 2Wire Inc RNDIS-ish products.
 108          */
 109         if (len == 0) {
 110                 struct usb_host_endpoint        *hep;
 111
 112                 hep = intf->cur_altsetting->endpoint;
 113                 if (hep) {
 114                         buf = hep->extra;
 115                         len = hep->extralen;
 116                 }
 117                 if (len)
 118                         dev_dbg(&intf->dev,
 119                                 "CDC descriptors on endpoint\n");
 120         }
 121
 122         /* this assumes that if there's a non-RNDIS vendor variant
 123          * of cdc-acm, it'll fail RNDIS requests cleanly.
 124          */
 125         rndis = (is_rndis(&intf->cur_altsetting->desc) ||
 126                  is_activesync(&intf->cur_altsetting->desc) ||
 127                  is_wireless_rndis(&intf->cur_altsetting->desc));
 128
 129         memset(info, 0, sizeof *info);
 130         info->control = intf;
 131         while (len > 3) {
 132                 if (buf [1] != USB_DT_CS_INTERFACE)
 133                         goto next_desc;
 134
 135                 /* use bDescriptorSubType to identify the CDC descriptors.
 136                  * We expect devices with CDC header and union descriptors.
 137                  * For CDC Ethernet we need the ethernet descriptor.
 138                  * For RNDIS, ignore two (pointless) CDC modem descriptors
 139                  * in favor of a complicated OID-based RPC scheme doing what
 140                  * CDC Ethernet achieves with a simple descriptor.
 141                  */
 142                 switch (buf [2]) {
 143                 case USB_CDC_HEADER_TYPE:
 144                         if (info->header) {
 145                                 dev_dbg(&intf->dev, "extra CDC header\n");
 146                                 goto bad_desc;
 147                         }
 148                         info->header = (void *) buf;
 149                         if (info->header->bLength != sizeof *info->header) {
 150                                 dev_dbg(&intf->dev, "CDC header len %u\n",
 151                                         info->header->bLength);
 152                                 goto bad_desc;
 153                         }
 154                         break;
 155                 case USB_CDC_ACM_TYPE:
 156                         /* paranoia:  disambiguate a "real" vendor-specific
 157                          * modem interface from an RNDIS non-modem.
 158                          */
 159                         if (rndis) {
 160                                 struct usb_cdc_acm_descriptor *acm;
 161
 162                                 acm = (void *) buf;
 163                                 if (acm->bmCapabilities) {
 164                                         dev_dbg(&intf->dev,
 165                                                 "ACM capabilities %02x, "
 166                                                 "not really RNDIS?\n",
 167                                                 acm->bmCapabilities);
 168                                         goto bad_desc;
 169                                 }
 170                         }
 171                         break;
 172                 case USB_CDC_UNION_TYPE:
 173                         if (info->u) {
 174                                 dev_dbg(&intf->dev, "extra CDC union\n");
 175                                 goto bad_desc;
 176                         }
 177                         info->u = (void *) buf;
 178                         if (info->u->bLength != sizeof *info->u) {
 179                                 dev_dbg(&intf->dev, "CDC union len %u\n",
 180                                         info->u->bLength);
 181                                 goto bad_desc;
 182                         }
 183
 184                         /* we need a master/control interface (what we're
 185                          * probed with) and a slave/data interface; union
 186                          * descriptors sort this all out.
 187                          */
 188                         info->control = usb_ifnum_to_if(dev->udev,
 189                                                 info->u->bMasterInterface0);
 190                         info->data = usb_ifnum_to_if(dev->udev,
 191                                                 info->u->bSlaveInterface0);
 192                         if (!info->control || !info->data) {
 193                                 dev_dbg(&intf->dev,
 194                                         "master #%u/%p slave #%u/%p\n",
 195                                         info->u->bMasterInterface0,
 196                                         info->control,
 197                                         info->u->bSlaveInterface0,
 198                                         info->data);
 199                                 /* fall back to hard-wiring for RNDIS */
 200                                 if (rndis) {
 201                                         android_rndis_quirk = true;
 202                                         goto next_desc;
 203                                 }
 204                                 goto bad_desc;
 205                         }
 206                         if (info->control != intf) {
 207                                 dev_dbg(&intf->dev, "bogus CDC Union\n");
 208                                 /* Ambit USB Cable Modem (and maybe others)
 209                                  * interchanges master and slave interface.
 210                                  */
 211                                 if (info->data == intf) {
 212                                         info->data = info->control;
 213                                         info->control = intf;
 214                                 } else
 215                                         goto bad_desc;
 216                         }
 217
 218                         /* a data interface altsetting does the real i/o */
 219                         d = &info->data->cur_altsetting->desc;
 220                         if (d->bInterfaceClass != USB_CLASS_CDC_DATA) {
 221                                 dev_dbg(&intf->dev, "slave class %u\n",
 222                                         d->bInterfaceClass);
 223                                 goto bad_desc;
 224                         }
 225                         break;
 226                 case USB_CDC_ETHERNET_TYPE:
 227                         if (info->ether) {
 228                                 dev_dbg(&intf->dev, "extra CDC ether\n");
 229                                 goto bad_desc;
 230                         }
 231                         info->ether = (void *) buf;
 232                         if (info->ether->bLength != sizeof *info->ether) {
 233                                 dev_dbg(&intf->dev, "CDC ether len %u\n",
 234                                         info->ether->bLength);
 235                                 goto bad_desc;
 236                         }
 237                         dev->hard_mtu = le16_to_cpu(
 238                                                 info->ether->wMaxSegmentSize);
 239                         /* because of Zaurus, we may be ignoring the host
 240                          * side link address we were given.
 241                          */
 242                         break;
 243                 case USB_CDC_MDLM_TYPE:
 244                         if (desc) {
 245                                 dev_dbg(&intf->dev, "extra MDLM descriptor\n");
 246                                 goto bad_desc;
 247                         }
 248
 249                         desc = (void *)buf;
 250
 251                         if (desc->bLength != sizeof(*desc))
 252                                 goto bad_desc;
 253
 254                         if (memcmp(&desc->bGUID, mbm_guid, 16))
 255                                 goto bad_desc;
 256                         break;
 257                 case USB_CDC_MDLM_DETAIL_TYPE:
 258                         if (detail) {
 259                                 dev_dbg(&intf->dev, "extra MDLM detail descriptor\n");
 260                                 goto bad_desc;
 261                         }
 262
 263                         detail = (void *)buf;
 264
 265                         if (detail->bGuidDescriptorType == 0) {
 266                                 if (detail->bLength < (sizeof(*detail) + 1))
 267                                         goto bad_desc;
 268                         } else
 269                                 goto bad_desc;
 270                         break;
 271                 }
 272 next_desc:
 273                 len -= buf [0]; /* bLength */
 274                 buf += buf [0];
 275         }
 276
 277         /* Microsoft ActiveSync based and some regular RNDIS devices lack the
 278          * CDC descriptors, so we'll hard-wire the interfaces and not check
 279          * for descriptors.
 280          *
 281          * Some Android RNDIS devices have a CDC Union descriptor pointing
 282          * to non-existing interfaces.  Ignore that and attempt the same
 283          * hard-wired 0 and 1 interfaces.
 284          */
 285         if (rndis && (!info->u || android_rndis_quirk)) {
 286                 info->control = usb_ifnum_to_if(dev->udev, 0);
 287                 info->data = usb_ifnum_to_if(dev->udev, 1);
 288                 if (!info->control || !info->data || info->control != intf) {
 289                         dev_dbg(&intf->dev,
 290                                 "rndis: master #0/%p slave #1/%p\n",
 291                                 info->control,
 292                                 info->data);
 293                         goto bad_desc;
 294                 }
 295
 296         } else if (!info->header || !info->u || (!rndis && !info->ether)) {
 297                 dev_dbg(&intf->dev, "missing cdc %s%s%sdescriptor\n",
 298                         info->header ? "" : "header ",
 299                         info->u ? "" : "union ",
 300                         info->ether ? "" : "ether ");
 301                 goto bad_desc;
 302         }
 303
 304         /* claim data interface and set it up ... with side effects.
 305          * network traffic can't flow until an altsetting is enabled.
 306          */
 307         status = usb_driver_claim_interface(driver, info->data, dev);
 308         if (status < 0)
 309                 return status;
 310         status = usbnet_get_endpoints(dev, info->data);
 311         if (status < 0) {
 312                 /* ensure immediate exit from usbnet_disconnect */
 313                 usb_set_intfdata(info->data, NULL);
 314                 usb_driver_release_interface(driver, info->data);
 315                 return status;
 316         }
 317
 318         /* status endpoint: optional for CDC Ethernet, not RNDIS (or ACM) */
 319         dev->status = NULL;
 320         if (info->control->cur_altsetting->desc.bNumEndpoints == 1) {
 321                 struct usb_endpoint_descriptor  *desc;
 322
 323                 dev->status = &info->control->cur_altsetting->endpoint [0];
 324                 desc = &dev->status->desc;
 325                 if (!usb_endpoint_is_int_in(desc) ||
 326                     (le16_to_cpu(desc->wMaxPacketSize)
 327                      < sizeof(struct usb_cdc_notification)) ||
 328                     !desc->bInterval) {
 329                         dev_dbg(&intf->dev, "bad notification endpoint\n");
 330                         dev->status = NULL;
 331                 }
 332         }
 333         if (rndis && !dev->status) {
 334                 dev_dbg(&intf->dev, "missing RNDIS status endpoint\n");
 335                 usb_set_intfdata(info->data, NULL);
 336                 usb_driver_release_interface(driver, info->data);
 337                 return -ENODEV;
 338         }
 339         return 0;
 340
 341 bad_desc:
 342         dev_info(&dev->udev->dev, "bad CDC descriptors\n");
 343         return -ENODEV;
 344 }
 345 EXPORT_SYMBOL_GPL(usbnet_generic_cdc_bind);
 346
 347 void usbnet_cdc_unbind(struct usbnet *dev, struct usb_interface *intf)
 348 {
 349         struct cdc_state                *info = (void *) &dev->data;
 350         struct usb_driver               *driver = driver_of(intf);
 351
 352         /* disconnect master --> disconnect slave */
 353         if (intf == info->control && info->data) {
 354                 /* ensure immediate exit from usbnet_disconnect */
 355                 usb_set_intfdata(info->data, NULL);
 356                 usb_driver_release_interface(driver, info->data);
 357                 info->data = NULL;
 358         }
 359
 360         /* and vice versa (just in case) */
 361         else if (intf == info->data && info->control) {
 362                 /* ensure immediate exit from usbnet_disconnect */
 363                 usb_set_intfdata(info->control, NULL);
 364                 usb_driver_release_interface(driver, info->control);
 365                 info->control = NULL;
 366         }
 367 }
 368 EXPORT_SYMBOL_GPL(usbnet_cdc_unbind);
 369
 370 /*-------------------------------------------------------------------------
 371  *
 372  * Communications Device Class, Ethernet Control model
 373  *
 374  * Takes two interfaces.  The DATA interface is inactive till an altsetting
 375  * is selected.  Configuration data includes class descriptors.  There's
 376  * an optional status endpoint on the control interface.
 377  *
 378  * This should interop with whatever the 2.4 "CDCEther.c" driver
 379  * (by Brad Hards) talked with, with more functionality.
 380  *
 381  *-------------------------------------------------------------------------*/
 382
 383 static void dumpspeed(struct usbnet *dev, __le32 *speeds)
 384 {
 385         netif_info(dev, timer, dev->net,
 386                    "link speeds: %u kbps up, %u kbps down\n",
 387                    __le32_to_cpu(speeds[0]) / 1000,
 388                    __le32_to_cpu(speeds[1]) / 1000);
 389 }
 390
 391 void usbnet_cdc_status(struct usbnet *dev, struct urb *urb)
 392 {
 393         struct usb_cdc_notification     *event;
 394
 395         if (urb->actual_length < sizeof *event)
 396                 return;
 397
 398         /* SPEED_CHANGE can get split into two 8-byte packets */
 399         if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
 400                 dumpspeed(dev, (__le32 *) urb->transfer_buffer);
 401                 return;
 402         }
 403
 404         event = urb->transfer_buffer;
 405         switch (event->bNotificationType) {
 406         case USB_CDC_NOTIFY_NETWORK_CONNECTION:
 407                 netif_dbg(dev, timer, dev->net, "CDC: carrier %s\n",
 408                           event->wValue ? "on" : "off");
 409                 if (event->wValue)
 410                         netif_carrier_on(dev->net);
 411                 else
 412                         netif_carrier_off(dev->net);
 413                 break;
 414         case USB_CDC_NOTIFY_SPEED_CHANGE:       /* tx/rx rates */
 415                 netif_dbg(dev, timer, dev->net, "CDC: speed change (len %d)\n",
 416                           urb->actual_length);
 417                 if (urb->actual_length != (sizeof *event + 8))
 418                         set_bit(EVENT_STS_SPLIT, &dev->flags);
 419                 else
 420                         dumpspeed(dev, (__le32 *) &event[1]);
 421                 break;
 422         /* USB_CDC_NOTIFY_RESPONSE_AVAILABLE can happen too (e.g. RNDIS),
 423          * but there are no standard formats for the response data.
 424          */
 425         default:
 426                 netdev_err(dev->net, "CDC: unexpected notification %02x!\n",
 427                            event->bNotificationType);
 428                 break;
 429         }
 430 }
 431 EXPORT_SYMBOL_GPL(usbnet_cdc_status);
 432
 433 int usbnet_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
 434 {
 435         int                             status;
 436         struct cdc_state                *info = (void *) &dev->data;
 437
 438         status = usbnet_generic_cdc_bind(dev, intf);
 439         if (status < 0)
 440                 return status;
 441
 442         status = usbnet_get_ethernet_addr(dev, info->ether->iMACAddress);
 443         if (status < 0) {
 444                 usb_set_intfdata(info->data, NULL);
 445                 usb_driver_release_interface(driver_of(intf), info->data);
 446                 return status;
 447         }
 448
 449         /* FIXME cdc-ether has some multicast code too, though it complains
 450          * in routine cases.  info->ether describes the multicast support.
 451          * Implement that here, manipulating the cdc filter as needed.
 452          */
 453         return 0;
 454 }
 455 EXPORT_SYMBOL_GPL(usbnet_cdc_bind);
 456
 457 static int cdc_manage_power(struct usbnet *dev, int on)
 458 {
 459         dev->intf->needs_remote_wakeup = on;
 460         return 0;
 461 }
 462
 463 static const struct driver_info cdc_info = {
 464         .description =  "CDC Ethernet Device",
 465         .flags =        FLAG_ETHER | FLAG_POINTTOPOINT,
 466         // .check_connect = cdc_check_connect,
 467         .bind =         usbnet_cdc_bind,
 468         .unbind =       usbnet_cdc_unbind,
 469         .status =       usbnet_cdc_status,
 470         .manage_power = cdc_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 = cdc_manage_power,
 480 };
 481
 482 /*-------------------------------------------------------------------------*/
 483
 484 #define HUAWEI_VENDOR_ID        0x12D1
 485 #define NOVATEL_VENDOR_ID       0x1410
 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 /* LG Electronics VL600 wants additional headers on every frame */
 578 {
 579         USB_DEVICE_AND_INTERFACE_INFO(0x1004, 0x61aa, USB_CLASS_COMM,
 580                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 581         .driver_info = 0,
 582 },
 583
 584 /* Logitech Harmony 900 - uses the pseudo-MDLM (BLAN) driver */
 585 {
 586         USB_DEVICE_AND_INTERFACE_INFO(0x046d, 0xc11f, USB_CLASS_COMM,
 587                         USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
 588         .driver_info            = 0,
 589 },
 590
 591 /*
 592  * WHITELIST!!!
 593  *
 594  * CDC Ether uses two interfaces, not necessarily consecutive.
 595  * We match the main interface, ignoring the optional device
 596  * class so we could handle devices that aren't exclusively
 597  * CDC ether.
 598  *
 599  * NOTE:  this match must come AFTER entries blacklisting devices
 600  * because of bugs/quirks in a given product (like Zaurus, above).
 601  */
 602 {
 603         /* Novatel USB551L */
 604         /* This match must come *before* the generic CDC-ETHER match so that
 605          * we get FLAG_WWAN set on the device, since it's descriptors are
 606          * generic CDC-ETHER.
 607          */
 608         .match_flags    =   USB_DEVICE_ID_MATCH_VENDOR
 609                  | USB_DEVICE_ID_MATCH_PRODUCT
 610                  | USB_DEVICE_ID_MATCH_INT_INFO,
 611         .idVendor               = NOVATEL_VENDOR_ID,
 612         .idProduct              = 0xB001,
 613         .bInterfaceClass        = USB_CLASS_COMM,
 614         .bInterfaceSubClass     = USB_CDC_SUBCLASS_ETHERNET,
 615         .bInterfaceProtocol     = USB_CDC_PROTO_NONE,
 616         .driver_info = (unsigned long)&wwan_info,
 617 }, {
 618         /* Telit modules */
 619         USB_VENDOR_AND_INTERFACE_INFO(0x1bc7, USB_CLASS_COMM,
 620                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 621         .driver_info = (kernel_ulong_t) &wwan_info,
 622 }, {
 623         USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ETHERNET,
 624                         USB_CDC_PROTO_NONE),
 625         .driver_info = (unsigned long) &cdc_info,
 626 }, {
 627         USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_MDLM,
 628                         USB_CDC_PROTO_NONE),
 629         .driver_info = (unsigned long)&wwan_info,
 630
 631 }, {
 632         /* Various Huawei modems with a network port like the UMG1831 */
 633         .match_flags    =   USB_DEVICE_ID_MATCH_VENDOR
 634                  | USB_DEVICE_ID_MATCH_INT_INFO,
 635         .idVendor               = HUAWEI_VENDOR_ID,
 636         .bInterfaceClass        = USB_CLASS_COMM,
 637         .bInterfaceSubClass     = USB_CDC_SUBCLASS_ETHERNET,
 638         .bInterfaceProtocol     = 255,
 639         .driver_info = (unsigned long)&wwan_info,
 640 },
 641         { },            // END
 642 };
 643 MODULE_DEVICE_TABLE(usb, products);
 644
 645 static struct usb_driver cdc_driver = {
 646         .name =         "cdc_ether",
 647         .id_table =     products,
 648         .probe =        usbnet_probe,
 649         .disconnect =   usbnet_disconnect,
 650         .suspend =      usbnet_suspend,
 651         .resume =       usbnet_resume,
 652         .reset_resume = usbnet_resume,
 653         .supports_autosuspend = 1,
 654 };
 655
 656
 657 static int __init cdc_init(void)
 658 {
 659         BUILD_BUG_ON((sizeof(((struct usbnet *)0)->data)
 660                         < sizeof(struct cdc_state)));
 661
 662         return usb_register(&cdc_driver);
 663 }
 664 module_init(cdc_init);
 665
 666 static void __exit cdc_exit(void)
 667 {
 668         usb_deregister(&cdc_driver);
 669 }
 670 module_exit(cdc_exit);
 671
 672 MODULE_AUTHOR("David Brownell");
 673 MODULE_DESCRIPTION("USB CDC Ethernet devices");
 674 MODULE_LICENSE("GPL");