drivers/net/usb/cdc_ether.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * CDC Ethernet based networking peripherals
   4  * Copyright (C) 2003-2005 by David Brownell
   5  * Copyright (C) 2006 by Ole Andre Vadla Ravnas (ActiveSync)
   6  */
   7
   8 // #define      DEBUG                   // error path messages, extra info
   9 // #define      VERBOSE                 // more; success messages
  10
  11 #include <linux/module.h>
  12 #include <linux/netdevice.h>
  13 #include <linux/etherdevice.h>
  14 #include <linux/ethtool.h>
  15 #include <linux/workqueue.h>
  16 #include <linux/mii.h>
  17 #include <linux/usb.h>
  18 #include <linux/usb/cdc.h>
  19 #include <linux/usb/usbnet.h>
  20
  21
  22 #if IS_ENABLED(CONFIG_USB_NET_RNDIS_HOST)
  23
  24 static int is_rndis(struct usb_interface_descriptor *desc)
  25 {
  26         return (desc->bInterfaceClass == USB_CLASS_COMM &&
  27                 desc->bInterfaceSubClass == 2 &&
  28                 desc->bInterfaceProtocol == 0xff);
  29 }
  30
  31 static int is_activesync(struct usb_interface_descriptor *desc)
  32 {
  33         return (desc->bInterfaceClass == USB_CLASS_MISC &&
  34                 desc->bInterfaceSubClass == 1 &&
  35                 desc->bInterfaceProtocol == 1);
  36 }
  37
  38 static int is_wireless_rndis(struct usb_interface_descriptor *desc)
  39 {
  40         return (desc->bInterfaceClass == USB_CLASS_WIRELESS_CONTROLLER &&
  41                 desc->bInterfaceSubClass == 1 &&
  42                 desc->bInterfaceProtocol == 3);
  43 }
  44
  45 static int is_novatel_rndis(struct usb_interface_descriptor *desc)
  46 {
  47         return (desc->bInterfaceClass == USB_CLASS_MISC &&
  48                 desc->bInterfaceSubClass == 4 &&
  49                 desc->bInterfaceProtocol == 1);
  50 }
  51
  52 #else
  53
  54 #define is_rndis(desc)          0
  55 #define is_activesync(desc)     0
  56 #define is_wireless_rndis(desc) 0
  57 #define is_novatel_rndis(desc)  0
  58
  59 #endif
  60
  61 static const u8 mbm_guid[16] = {
  62         0xa3, 0x17, 0xa8, 0x8b, 0x04, 0x5e, 0x4f, 0x01,
  63         0xa6, 0x07, 0xc0, 0xff, 0xcb, 0x7e, 0x39, 0x2a,
  64 };
  65
  66 static void usbnet_cdc_update_filter(struct usbnet *dev)
  67 {
  68         struct cdc_state        *info = (void *) &dev->data;
  69         struct usb_interface    *intf = info->control;
  70         struct net_device       *net = dev->net;
  71
  72         u16 cdc_filter = USB_CDC_PACKET_TYPE_DIRECTED
  73                         | USB_CDC_PACKET_TYPE_BROADCAST;
  74
  75         /* filtering on the device is an optional feature and not worth
  76          * the hassle so we just roughly care about snooping and if any
  77          * multicast is requested, we take every multicast
  78          */
  79         if (net->flags & IFF_PROMISC)
  80                 cdc_filter |= USB_CDC_PACKET_TYPE_PROMISCUOUS;
  81         if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI))
  82                 cdc_filter |= USB_CDC_PACKET_TYPE_ALL_MULTICAST;
  83
  84         usb_control_msg(dev->udev,
  85                         usb_sndctrlpipe(dev->udev, 0),
  86                         USB_CDC_SET_ETHERNET_PACKET_FILTER,
  87                         USB_TYPE_CLASS | USB_RECIP_INTERFACE,
  88                         cdc_filter,
  89                         intf->cur_altsetting->desc.bInterfaceNumber,
  90                         NULL,
  91                         0,
  92                         USB_CTRL_SET_TIMEOUT
  93                 );
  94 }
  95
  96 /* probes control interface, claims data interface, collects the bulk
  97  * endpoints, activates data interface (if needed), maybe sets MTU.
  98  * all pure cdc, except for certain firmware workarounds, and knowing
  99  * that rndis uses one different rule.
 100  */
 101 int usbnet_generic_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
 102 {
 103         u8                              *buf = intf->cur_altsetting->extra;
 104         int                             len = intf->cur_altsetting->extralen;
 105         struct usb_interface_descriptor *d;
 106         struct cdc_state                *info = (void *) &dev->data;
 107         int                             status;
 108         int                             rndis;
 109         bool                            android_rndis_quirk = false;
 110         struct usb_driver               *driver = driver_of(intf);
 111         struct usb_cdc_parsed_header header;
 112
 113         if (sizeof(dev->data) < sizeof(*info))
 114                 return -EDOM;
 115
 116         /* expect strict spec conformance for the descriptors, but
 117          * cope with firmware which stores them in the wrong place
 118          */
 119         if (len == 0 && dev->udev->actconfig->extralen) {
 120                 /* Motorola SB4100 (and others: Brad Hards says it's
 121                  * from a Broadcom design) put CDC descriptors here
 122                  */
 123                 buf = dev->udev->actconfig->extra;
 124                 len = dev->udev->actconfig->extralen;
 125                 dev_dbg(&intf->dev, "CDC descriptors on config\n");
 126         }
 127
 128         /* Maybe CDC descriptors are after the endpoint?  This bug has
 129          * been seen on some 2Wire Inc RNDIS-ish products.
 130          */
 131         if (len == 0) {
 132                 struct usb_host_endpoint        *hep;
 133
 134                 hep = intf->cur_altsetting->endpoint;
 135                 if (hep) {
 136                         buf = hep->extra;
 137                         len = hep->extralen;
 138                 }
 139                 if (len)
 140                         dev_dbg(&intf->dev,
 141                                 "CDC descriptors on endpoint\n");
 142         }
 143
 144         /* this assumes that if there's a non-RNDIS vendor variant
 145          * of cdc-acm, it'll fail RNDIS requests cleanly.
 146          */
 147         rndis = (is_rndis(&intf->cur_altsetting->desc) ||
 148                  is_activesync(&intf->cur_altsetting->desc) ||
 149                  is_wireless_rndis(&intf->cur_altsetting->desc) ||
 150                  is_novatel_rndis(&intf->cur_altsetting->desc));
 151
 152         memset(info, 0, sizeof(*info));
 153         info->control = intf;
 154
 155         cdc_parse_cdc_header(&header, intf, buf, len);
 156
 157         info->u = header.usb_cdc_union_desc;
 158         info->header = header.usb_cdc_header_desc;
 159         info->ether = header.usb_cdc_ether_desc;
 160         if (!info->u) {
 161                 if (rndis)
 162                         goto skip;
 163                 else /* in that case a quirk is mandatory */
 164                         goto bad_desc;
 165         }
 166         /* we need a master/control interface (what we're
 167          * probed with) and a slave/data interface; union
 168          * descriptors sort this all out.
 169          */
 170         info->control = usb_ifnum_to_if(dev->udev, info->u->bMasterInterface0);
 171         info->data = usb_ifnum_to_if(dev->udev, info->u->bSlaveInterface0);
 172         if (!info->control || !info->data) {
 173                 dev_dbg(&intf->dev,
 174                         "master #%u/%p slave #%u/%p\n",
 175                         info->u->bMasterInterface0,
 176                         info->control,
 177                         info->u->bSlaveInterface0,
 178                         info->data);
 179                 /* fall back to hard-wiring for RNDIS */
 180                 if (rndis) {
 181                         android_rndis_quirk = true;
 182                         goto skip;
 183                 }
 184                 goto bad_desc;
 185         }
 186         if (info->control != intf) {
 187                 dev_dbg(&intf->dev, "bogus CDC Union\n");
 188                 /* Ambit USB Cable Modem (and maybe others)
 189                  * interchanges master and slave interface.
 190                  */
 191                 if (info->data == intf) {
 192                         info->data = info->control;
 193                         info->control = intf;
 194                 } else
 195                         goto bad_desc;
 196         }
 197
 198         /* some devices merge these - skip class check */
 199         if (info->control == info->data)
 200                 goto skip;
 201
 202         /* a data interface altsetting does the real i/o */
 203         d = &info->data->cur_altsetting->desc;
 204         if (d->bInterfaceClass != USB_CLASS_CDC_DATA) {
 205                 dev_dbg(&intf->dev, "slave class %u\n", d->bInterfaceClass);
 206                 goto bad_desc;
 207         }
 208 skip:
 209         /* Communcation class functions with bmCapabilities are not
 210          * RNDIS.  But some Wireless class RNDIS functions use
 211          * bmCapabilities for their own purpose. The failsafe is
 212          * therefore applied only to Communication class RNDIS
 213          * functions.  The rndis test is redundant, but a cheap
 214          * optimization.
 215          */
 216         if (rndis && is_rndis(&intf->cur_altsetting->desc) &&
 217             header.usb_cdc_acm_descriptor &&
 218             header.usb_cdc_acm_descriptor->bmCapabilities) {
 219                 dev_dbg(&intf->dev,
 220                         "ACM capabilities %02x, not really RNDIS?\n",
 221                         header.usb_cdc_acm_descriptor->bmCapabilities);
 222                 goto bad_desc;
 223         }
 224
 225         if (header.usb_cdc_ether_desc && info->ether->wMaxSegmentSize) {
 226                 dev->hard_mtu = le16_to_cpu(info->ether->wMaxSegmentSize);
 227                 /* because of Zaurus, we may be ignoring the host
 228                  * side link address we were given.
 229                  */
 230         }
 231
 232         if (header.usb_cdc_mdlm_desc &&
 233             memcmp(header.usb_cdc_mdlm_desc->bGUID, mbm_guid, 16)) {
 234                 dev_dbg(&intf->dev, "GUID doesn't match\n");
 235                 goto bad_desc;
 236         }
 237
 238         if (header.usb_cdc_mdlm_detail_desc &&
 239                 header.usb_cdc_mdlm_detail_desc->bLength <
 240                         (sizeof(struct usb_cdc_mdlm_detail_desc) + 1)) {
 241                 dev_dbg(&intf->dev, "Descriptor too short\n");
 242                 goto bad_desc;
 243         }
 244
 245
 246
 247         /* Microsoft ActiveSync based and some regular RNDIS devices lack the
 248          * CDC descriptors, so we'll hard-wire the interfaces and not check
 249          * for descriptors.
 250          *
 251          * Some Android RNDIS devices have a CDC Union descriptor pointing
 252          * to non-existing interfaces.  Ignore that and attempt the same
 253          * hard-wired 0 and 1 interfaces.
 254          */
 255         if (rndis && (!info->u || android_rndis_quirk)) {
 256                 info->control = usb_ifnum_to_if(dev->udev, 0);
 257                 info->data = usb_ifnum_to_if(dev->udev, 1);
 258                 if (!info->control || !info->data || info->control != intf) {
 259                         dev_dbg(&intf->dev,
 260                                 "rndis: master #0/%p slave #1/%p\n",
 261                                 info->control,
 262                                 info->data);
 263                         goto bad_desc;
 264                 }
 265
 266         } else if (!info->header || (!rndis && !info->ether)) {
 267                 dev_dbg(&intf->dev, "missing cdc %s%s%sdescriptor\n",
 268                         info->header ? "" : "header ",
 269                         info->u ? "" : "union ",
 270                         info->ether ? "" : "ether ");
 271                 goto bad_desc;
 272         }
 273
 274         /* claim data interface and set it up ... with side effects.
 275          * network traffic can't flow until an altsetting is enabled.
 276          */
 277         if (info->data != info->control) {
 278                 status = usb_driver_claim_interface(driver, info->data, dev);
 279                 if (status < 0)
 280                         return status;
 281         }
 282         status = usbnet_get_endpoints(dev, info->data);
 283         if (status < 0) {
 284                 /* ensure immediate exit from usbnet_disconnect */
 285                 usb_set_intfdata(info->data, NULL);
 286                 if (info->data != info->control)
 287                         usb_driver_release_interface(driver, info->data);
 288                 return status;
 289         }
 290
 291         /* status endpoint: optional for CDC Ethernet, not RNDIS (or ACM) */
 292         if (info->data != info->control)
 293                 dev->status = NULL;
 294         if (info->control->cur_altsetting->desc.bNumEndpoints == 1) {
 295                 struct usb_endpoint_descriptor  *desc;
 296
 297                 dev->status = &info->control->cur_altsetting->endpoint[0];
 298                 desc = &dev->status->desc;
 299                 if (!usb_endpoint_is_int_in(desc) ||
 300                     (le16_to_cpu(desc->wMaxPacketSize)
 301                      < sizeof(struct usb_cdc_notification)) ||
 302                     !desc->bInterval) {
 303                         dev_dbg(&intf->dev, "bad notification endpoint\n");
 304                         dev->status = NULL;
 305                 }
 306         }
 307         if (rndis && !dev->status) {
 308                 dev_dbg(&intf->dev, "missing RNDIS status endpoint\n");
 309                 usb_set_intfdata(info->data, NULL);
 310                 usb_driver_release_interface(driver, info->data);
 311                 return -ENODEV;
 312         }
 313
 314         return 0;
 315
 316 bad_desc:
 317         dev_info(&dev->udev->dev, "bad CDC descriptors\n");
 318         return -ENODEV;
 319 }
 320 EXPORT_SYMBOL_GPL(usbnet_generic_cdc_bind);
 321
 322
 323 /* like usbnet_generic_cdc_bind() but handles filter initialization
 324  * correctly
 325  */
 326 int usbnet_ether_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
 327 {
 328         int rv;
 329
 330         rv = usbnet_generic_cdc_bind(dev, intf);
 331         if (rv < 0)
 332                 goto bail_out;
 333
 334         /* Some devices don't initialise properly. In particular
 335          * the packet filter is not reset. There are devices that
 336          * don't do reset all the way. So the packet filter should
 337          * be set to a sane initial value.
 338          */
 339         usbnet_cdc_update_filter(dev);
 340
 341 bail_out:
 342         return rv;
 343 }
 344 EXPORT_SYMBOL_GPL(usbnet_ether_cdc_bind);
 345
 346 void usbnet_cdc_unbind(struct usbnet *dev, struct usb_interface *intf)
 347 {
 348         struct cdc_state                *info = (void *) &dev->data;
 349         struct usb_driver               *driver = driver_of(intf);
 350
 351         /* combined interface - nothing  to do */
 352         if (info->data == info->control)
 353                 return;
 354
 355         /* disconnect master --> disconnect slave */
 356         if (intf == info->control && info->data) {
 357                 /* ensure immediate exit from usbnet_disconnect */
 358                 usb_set_intfdata(info->data, NULL);
 359                 usb_driver_release_interface(driver, info->data);
 360                 info->data = NULL;
 361         }
 362
 363         /* and vice versa (just in case) */
 364         else if (intf == info->data && info->control) {
 365                 /* ensure immediate exit from usbnet_disconnect */
 366                 usb_set_intfdata(info->control, NULL);
 367                 usb_driver_release_interface(driver, info->control);
 368                 info->control = NULL;
 369         }
 370 }
 371 EXPORT_SYMBOL_GPL(usbnet_cdc_unbind);
 372
 373 /* Communications Device Class, Ethernet Control model
 374  *
 375  * Takes two interfaces.  The DATA interface is inactive till an altsetting
 376  * is selected.  Configuration data includes class descriptors.  There's
 377  * an optional status endpoint on the control interface.
 378  *
 379  * This should interop with whatever the 2.4 "CDCEther.c" driver
 380  * (by Brad Hards) talked with, with more functionality.
 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                 usbnet_link_change(dev, !!event->wValue, 0);
 410                 break;
 411         case USB_CDC_NOTIFY_SPEED_CHANGE:       /* tx/rx rates */
 412                 netif_dbg(dev, timer, dev->net, "CDC: speed change (len %d)\n",
 413                           urb->actual_length);
 414                 if (urb->actual_length != (sizeof(*event) + 8))
 415                         set_bit(EVENT_STS_SPLIT, &dev->flags);
 416                 else
 417                         dumpspeed(dev, (__le32 *) &event[1]);
 418                 break;
 419         /* USB_CDC_NOTIFY_RESPONSE_AVAILABLE can happen too (e.g. RNDIS),
 420          * but there are no standard formats for the response data.
 421          */
 422         default:
 423                 netdev_err(dev->net, "CDC: unexpected notification %02x!\n",
 424                            event->bNotificationType);
 425                 break;
 426         }
 427 }
 428 EXPORT_SYMBOL_GPL(usbnet_cdc_status);
 429
 430 int usbnet_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
 431 {
 432         int                             status;
 433         struct cdc_state                *info = (void *) &dev->data;
 434
 435         BUILD_BUG_ON((sizeof(((struct usbnet *)0)->data)
 436                         < sizeof(struct cdc_state)));
 437
 438         status = usbnet_ether_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         return 0;
 450 }
 451 EXPORT_SYMBOL_GPL(usbnet_cdc_bind);
 452
 453 static int usbnet_cdc_zte_bind(struct usbnet *dev, struct usb_interface *intf)
 454 {
 455         int status = usbnet_cdc_bind(dev, intf);
 456
 457         if (!status && (dev->net->dev_addr[0] & 0x02))
 458                 eth_hw_addr_random(dev->net);
 459
 460         return status;
 461 }
 462
 463 /* Make sure packets have correct destination MAC address
 464  *
 465  * A firmware bug observed on some devices (ZTE MF823/831/910) is that the
 466  * device sends packets with a static, bogus, random MAC address (event if
 467  * device MAC address has been updated). Always set MAC address to that of the
 468  * device.
 469  */
 470 static int usbnet_cdc_zte_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 471 {
 472         if (skb->len < ETH_HLEN || !(skb->data[0] & 0x02))
 473                 return 1;
 474
 475         skb_reset_mac_header(skb);
 476         ether_addr_copy(eth_hdr(skb)->h_dest, dev->net->dev_addr);
 477
 478         return 1;
 479 }
 480
 481 /* Ensure correct link state
 482  *
 483  * Some devices (ZTE MF823/831/910) export two carrier on notifications when
 484  * connected. This causes the link state to be incorrect. Work around this by
 485  * always setting the state to off, then on.
 486  */
 487 static void usbnet_cdc_zte_status(struct usbnet *dev, struct urb *urb)
 488 {
 489         struct usb_cdc_notification *event;
 490
 491         if (urb->actual_length < sizeof(*event))
 492                 return;
 493
 494         event = urb->transfer_buffer;
 495
 496         if (event->bNotificationType != USB_CDC_NOTIFY_NETWORK_CONNECTION) {
 497                 usbnet_cdc_status(dev, urb);
 498                 return;
 499         }
 500
 501         netif_dbg(dev, timer, dev->net, "CDC: carrier %s\n",
 502                   event->wValue ? "on" : "off");
 503
 504         if (event->wValue &&
 505             netif_carrier_ok(dev->net))
 506                 netif_carrier_off(dev->net);
 507
 508         usbnet_link_change(dev, !!event->wValue, 0);
 509 }
 510
 511 static const struct driver_info cdc_info = {
 512         .description =  "CDC Ethernet Device",
 513         .flags =        FLAG_ETHER | FLAG_POINTTOPOINT,
 514         .bind =         usbnet_cdc_bind,
 515         .unbind =       usbnet_cdc_unbind,
 516         .status =       usbnet_cdc_status,
 517         .set_rx_mode =  usbnet_cdc_update_filter,
 518         .manage_power = usbnet_manage_power,
 519 };
 520
 521 static const struct driver_info zte_cdc_info = {
 522         .description =  "ZTE CDC Ethernet Device",
 523         .flags =        FLAG_ETHER | FLAG_POINTTOPOINT,
 524         .bind =         usbnet_cdc_zte_bind,
 525         .unbind =       usbnet_cdc_unbind,
 526         .status =       usbnet_cdc_zte_status,
 527         .set_rx_mode =  usbnet_cdc_update_filter,
 528         .manage_power = usbnet_manage_power,
 529         .rx_fixup = usbnet_cdc_zte_rx_fixup,
 530 };
 531
 532 static const struct driver_info wwan_info = {
 533         .description =  "Mobile Broadband Network Device",
 534         .flags =        FLAG_WWAN,
 535         .bind =         usbnet_cdc_bind,
 536         .unbind =       usbnet_cdc_unbind,
 537         .status =       usbnet_cdc_status,
 538         .set_rx_mode =  usbnet_cdc_update_filter,
 539         .manage_power = usbnet_manage_power,
 540 };
 541
 542 /*-------------------------------------------------------------------------*/
 543
 544 #define HUAWEI_VENDOR_ID        0x12D1
 545 #define NOVATEL_VENDOR_ID       0x1410
 546 #define ZTE_VENDOR_ID           0x19D2
 547 #define DELL_VENDOR_ID          0x413C
 548 #define REALTEK_VENDOR_ID       0x0bda
 549 #define SAMSUNG_VENDOR_ID       0x04e8
 550 #define LENOVO_VENDOR_ID        0x17ef
 551 #define LINKSYS_VENDOR_ID       0x13b1
 552 #define NVIDIA_VENDOR_ID        0x0955
 553 #define HP_VENDOR_ID            0x03f0
 554 #define MICROSOFT_VENDOR_ID     0x045e
 555 #define UBLOX_VENDOR_ID         0x1546
 556 #define TPLINK_VENDOR_ID        0x2357
 557 #define AQUANTIA_VENDOR_ID      0x2eca
 558 #define ASIX_VENDOR_ID          0x0b95
 559
 560 static const struct usb_device_id       products[] = {
 561 /* BLACKLIST !!
 562  *
 563  * First blacklist any products that are egregiously nonconformant
 564  * with the CDC Ethernet specs.  Minor braindamage we cope with; when
 565  * they're not even trying, needing a separate driver is only the first
 566  * of the differences to show up.
 567  */
 568
 569 #define ZAURUS_MASTER_INTERFACE \
 570         .bInterfaceClass        = USB_CLASS_COMM, \
 571         .bInterfaceSubClass     = USB_CDC_SUBCLASS_ETHERNET, \
 572         .bInterfaceProtocol     = USB_CDC_PROTO_NONE
 573
 574 /* SA-1100 based Sharp Zaurus ("collie"), or compatible;
 575  * wire-incompatible with true CDC Ethernet implementations.
 576  * (And, it seems, needlessly so...)
 577  */
 578 {
 579         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 580                           | USB_DEVICE_ID_MATCH_DEVICE,
 581         .idVendor               = 0x04DD,
 582         .idProduct              = 0x8004,
 583         ZAURUS_MASTER_INTERFACE,
 584         .driver_info            = 0,
 585 },
 586
 587 /* PXA-25x based Sharp Zaurii.  Note that it seems some of these
 588  * (later models especially) may have shipped only with firmware
 589  * advertising false "CDC MDLM" compatibility ... but we're not
 590  * clear which models did that, so for now let's assume the worst.
 591  */
 592 {
 593         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 594                           | USB_DEVICE_ID_MATCH_DEVICE,
 595         .idVendor               = 0x04DD,
 596         .idProduct              = 0x8005,       /* A-300 */
 597         ZAURUS_MASTER_INTERFACE,
 598         .driver_info            = 0,
 599 }, {
 600         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 601                           | USB_DEVICE_ID_MATCH_DEVICE,
 602         .idVendor               = 0x04DD,
 603         .idProduct              = 0x8006,       /* B-500/SL-5600 */
 604         ZAURUS_MASTER_INTERFACE,
 605         .driver_info            = 0,
 606 }, {
 607         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 608                           | USB_DEVICE_ID_MATCH_DEVICE,
 609         .idVendor               = 0x04DD,
 610         .idProduct              = 0x8007,       /* C-700 */
 611         ZAURUS_MASTER_INTERFACE,
 612         .driver_info            = 0,
 613 }, {
 614         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 615                  | USB_DEVICE_ID_MATCH_DEVICE,
 616         .idVendor               = 0x04DD,
 617         .idProduct              = 0x9031,       /* C-750 C-760 */
 618         ZAURUS_MASTER_INTERFACE,
 619         .driver_info            = 0,
 620 }, {
 621         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 622                  | USB_DEVICE_ID_MATCH_DEVICE,
 623         .idVendor               = 0x04DD,
 624         .idProduct              = 0x9032,       /* SL-6000 */
 625         ZAURUS_MASTER_INTERFACE,
 626         .driver_info            = 0,
 627 }, {
 628         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 629                  | USB_DEVICE_ID_MATCH_DEVICE,
 630         .idVendor               = 0x04DD,
 631         /* reported with some C860 units */
 632         .idProduct              = 0x9050,       /* C-860 */
 633         ZAURUS_MASTER_INTERFACE,
 634         .driver_info            = 0,
 635 },
 636
 637 /* Olympus has some models with a Zaurus-compatible option.
 638  * R-1000 uses a FreeScale i.MXL cpu (ARMv4T)
 639  */
 640 {
 641         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 642                  | USB_DEVICE_ID_MATCH_DEVICE,
 643         .idVendor               = 0x07B4,
 644         .idProduct              = 0x0F02,       /* R-1000 */
 645         ZAURUS_MASTER_INTERFACE,
 646         .driver_info            = 0,
 647 },
 648
 649 /* LG Electronics VL600 wants additional headers on every frame */
 650 {
 651         USB_DEVICE_AND_INTERFACE_INFO(0x1004, 0x61aa, USB_CLASS_COMM,
 652                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 653         .driver_info = 0,
 654 },
 655
 656 /* Logitech Harmony 900 - uses the pseudo-MDLM (BLAN) driver */
 657 {
 658         USB_DEVICE_AND_INTERFACE_INFO(0x046d, 0xc11f, USB_CLASS_COMM,
 659                         USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
 660         .driver_info            = 0,
 661 },
 662
 663 /* Novatel USB551L and MC551 - handled by qmi_wwan */
 664 {
 665         USB_DEVICE_AND_INTERFACE_INFO(NOVATEL_VENDOR_ID, 0xB001, USB_CLASS_COMM,
 666                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 667         .driver_info = 0,
 668 },
 669
 670 /* Novatel E362 - handled by qmi_wwan */
 671 {
 672         USB_DEVICE_AND_INTERFACE_INFO(NOVATEL_VENDOR_ID, 0x9010, USB_CLASS_COMM,
 673                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 674         .driver_info = 0,
 675 },
 676
 677 /* Dell Wireless 5800 (Novatel E362) - handled by qmi_wwan */
 678 {
 679         USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x8195, USB_CLASS_COMM,
 680                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 681         .driver_info = 0,
 682 },
 683
 684 /* Dell Wireless 5800 (Novatel E362) - handled by qmi_wwan */
 685 {
 686         USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x8196, USB_CLASS_COMM,
 687                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 688         .driver_info = 0,
 689 },
 690
 691 /* Dell Wireless 5804 (Novatel E371) - handled by qmi_wwan */
 692 {
 693         USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x819b, USB_CLASS_COMM,
 694                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 695         .driver_info = 0,
 696 },
 697
 698 /* Novatel Expedite E371 - handled by qmi_wwan */
 699 {
 700         USB_DEVICE_AND_INTERFACE_INFO(NOVATEL_VENDOR_ID, 0x9011, USB_CLASS_COMM,
 701                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 702         .driver_info = 0,
 703 },
 704
 705 /* HP lt2523 (Novatel E371) - handled by qmi_wwan */
 706 {
 707         USB_DEVICE_AND_INTERFACE_INFO(HP_VENDOR_ID, 0x421d, USB_CLASS_COMM,
 708                                       USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 709         .driver_info = 0,
 710 },
 711
 712 /* AnyDATA ADU960S - handled by qmi_wwan */
 713 {
 714         USB_DEVICE_AND_INTERFACE_INFO(0x16d5, 0x650a, USB_CLASS_COMM,
 715                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 716         .driver_info = 0,
 717 },
 718
 719 /* Huawei E1820 - handled by qmi_wwan */
 720 {
 721         USB_DEVICE_INTERFACE_NUMBER(HUAWEI_VENDOR_ID, 0x14ac, 1),
 722         .driver_info = 0,
 723 },
 724
 725 /* Realtek RTL8152 Based USB 2.0 Ethernet Adapters */
 726 {
 727         USB_DEVICE_AND_INTERFACE_INFO(REALTEK_VENDOR_ID, 0x8152, USB_CLASS_COMM,
 728                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 729         .driver_info = 0,
 730 },
 731
 732 /* Realtek RTL8153 Based USB 3.0 Ethernet Adapters */
 733 {
 734         USB_DEVICE_AND_INTERFACE_INFO(REALTEK_VENDOR_ID, 0x8153, USB_CLASS_COMM,
 735                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 736         .driver_info = 0,
 737 },
 738
 739 /* Samsung USB Ethernet Adapters */
 740 {
 741         USB_DEVICE_AND_INTERFACE_INFO(SAMSUNG_VENDOR_ID, 0xa101, USB_CLASS_COMM,
 742                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 743         .driver_info = 0,
 744 },
 745
 746 #if IS_ENABLED(CONFIG_USB_RTL8152)
 747 /* Linksys USB3GIGV1 Ethernet Adapter */
 748 {
 749         USB_DEVICE_AND_INTERFACE_INFO(LINKSYS_VENDOR_ID, 0x0041, USB_CLASS_COMM,
 750                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 751         .driver_info = 0,
 752 },
 753 #endif
 754
 755 /* ThinkPad USB-C Dock (based on Realtek RTL8153) */
 756 {
 757         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x3062, USB_CLASS_COMM,
 758                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 759         .driver_info = 0,
 760 },
 761
 762 /* ThinkPad Thunderbolt 3 Dock (based on Realtek RTL8153) */
 763 {
 764         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x3069, USB_CLASS_COMM,
 765                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 766         .driver_info = 0,
 767 },
 768
 769 /* ThinkPad Thunderbolt 3 Dock Gen 2 (based on Realtek RTL8153) */
 770 {
 771         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x3082, USB_CLASS_COMM,
 772                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 773         .driver_info = 0,
 774 },
 775
 776 /* Lenovo Thinkpad USB 3.0 Ethernet Adapters (based on Realtek RTL8153) */
 777 {
 778         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x7205, USB_CLASS_COMM,
 779                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 780         .driver_info = 0,
 781 },
 782
 783 /* Lenovo USB C to Ethernet Adapter (based on Realtek RTL8153) */
 784 {
 785         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x720c, USB_CLASS_COMM,
 786                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 787         .driver_info = 0,
 788 },
 789
 790 /* Lenovo USB-C Travel Hub (based on Realtek RTL8153) */
 791 {
 792         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x7214, USB_CLASS_COMM,
 793                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 794         .driver_info = 0,
 795 },
 796
 797 /* ThinkPad USB-C Dock Gen 2 (based on Realtek RTL8153) */
 798 {
 799         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0xa387, USB_CLASS_COMM,
 800                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 801         .driver_info = 0,
 802 },
 803
 804 /* NVIDIA Tegra USB 3.0 Ethernet Adapters (based on Realtek RTL8153) */
 805 {
 806         USB_DEVICE_AND_INTERFACE_INFO(NVIDIA_VENDOR_ID, 0x09ff, USB_CLASS_COMM,
 807                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 808         .driver_info = 0,
 809 },
 810
 811 /* Microsoft Surface 2 dock (based on Realtek RTL8152) */
 812 {
 813         USB_DEVICE_AND_INTERFACE_INFO(MICROSOFT_VENDOR_ID, 0x07ab, USB_CLASS_COMM,
 814                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 815         .driver_info = 0,
 816 },
 817
 818 /* Microsoft Surface 3 dock (based on Realtek RTL8153) */
 819 {
 820         USB_DEVICE_AND_INTERFACE_INFO(MICROSOFT_VENDOR_ID, 0x07c6, USB_CLASS_COMM,
 821                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 822         .driver_info = 0,
 823 },
 824
 825         /* TP-LINK UE300 USB 3.0 Ethernet Adapters (based on Realtek RTL8153) */
 826 {
 827         USB_DEVICE_AND_INTERFACE_INFO(TPLINK_VENDOR_ID, 0x0601, USB_CLASS_COMM,
 828                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 829         .driver_info = 0,
 830 },
 831
 832 /* Aquantia AQtion USB to 5GbE Controller (based on AQC111U) */
 833 {
 834         USB_DEVICE_AND_INTERFACE_INFO(AQUANTIA_VENDOR_ID, 0xc101,
 835                                       USB_CLASS_COMM, USB_CDC_SUBCLASS_ETHERNET,
 836                                       USB_CDC_PROTO_NONE),
 837         .driver_info = 0,
 838 },
 839
 840 /* ASIX USB 3.1 Gen1 to 5G Multi-Gigabit Ethernet Adapter(based on AQC111U) */
 841 {
 842         USB_DEVICE_AND_INTERFACE_INFO(ASIX_VENDOR_ID, 0x2790, USB_CLASS_COMM,
 843                                       USB_CDC_SUBCLASS_ETHERNET,
 844                                       USB_CDC_PROTO_NONE),
 845         .driver_info = 0,
 846 },
 847
 848 /* ASIX USB 3.1 Gen1 to 2.5G Multi-Gigabit Ethernet Adapter(based on AQC112U) */
 849 {
 850         USB_DEVICE_AND_INTERFACE_INFO(ASIX_VENDOR_ID, 0x2791, USB_CLASS_COMM,
 851                                       USB_CDC_SUBCLASS_ETHERNET,
 852                                       USB_CDC_PROTO_NONE),
 853         .driver_info = 0,
 854 },
 855
 856 /* USB-C 3.1 to 5GBASE-T Ethernet Adapter (based on AQC111U) */
 857 {
 858         USB_DEVICE_AND_INTERFACE_INFO(0x20f4, 0xe05a, USB_CLASS_COMM,
 859                                       USB_CDC_SUBCLASS_ETHERNET,
 860                                       USB_CDC_PROTO_NONE),
 861         .driver_info = 0,
 862 },
 863
 864 /* QNAP QNA-UC5G1T USB to 5GbE Adapter (based on AQC111U) */
 865 {
 866         USB_DEVICE_AND_INTERFACE_INFO(0x1c04, 0x0015, USB_CLASS_COMM,
 867                                       USB_CDC_SUBCLASS_ETHERNET,
 868                                       USB_CDC_PROTO_NONE),
 869         .driver_info = 0,
 870 },
 871
 872 /* WHITELIST!!!
 873  *
 874  * CDC Ether uses two interfaces, not necessarily consecutive.
 875  * We match the main interface, ignoring the optional device
 876  * class so we could handle devices that aren't exclusively
 877  * CDC ether.
 878  *
 879  * NOTE:  this match must come AFTER entries blacklisting devices
 880  * because of bugs/quirks in a given product (like Zaurus, above).
 881  */
 882 {
 883         /* ZTE (Vodafone) K3805-Z */
 884         USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1003, USB_CLASS_COMM,
 885                                       USB_CDC_SUBCLASS_ETHERNET,
 886                                       USB_CDC_PROTO_NONE),
 887         .driver_info = (unsigned long)&wwan_info,
 888 }, {
 889         /* ZTE (Vodafone) K3806-Z */
 890         USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1015, USB_CLASS_COMM,
 891                                       USB_CDC_SUBCLASS_ETHERNET,
 892                                       USB_CDC_PROTO_NONE),
 893         .driver_info = (unsigned long)&wwan_info,
 894 }, {
 895         /* ZTE (Vodafone) K4510-Z */
 896         USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1173, USB_CLASS_COMM,
 897                                       USB_CDC_SUBCLASS_ETHERNET,
 898                                       USB_CDC_PROTO_NONE),
 899         .driver_info = (unsigned long)&wwan_info,
 900 }, {
 901         /* ZTE (Vodafone) K3770-Z */
 902         USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1177, USB_CLASS_COMM,
 903                                       USB_CDC_SUBCLASS_ETHERNET,
 904                                       USB_CDC_PROTO_NONE),
 905         .driver_info = (unsigned long)&wwan_info,
 906 }, {
 907         /* ZTE (Vodafone) K3772-Z */
 908         USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1181, USB_CLASS_COMM,
 909                                       USB_CDC_SUBCLASS_ETHERNET,
 910                                       USB_CDC_PROTO_NONE),
 911         .driver_info = (unsigned long)&wwan_info,
 912 }, {
 913         /* Telit modules */
 914         USB_VENDOR_AND_INTERFACE_INFO(0x1bc7, USB_CLASS_COMM,
 915                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 916         .driver_info = (kernel_ulong_t) &wwan_info,
 917 }, {
 918         /* Dell DW5580 modules */
 919         USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x81ba, USB_CLASS_COMM,
 920                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 921         .driver_info = (kernel_ulong_t)&wwan_info,
 922 }, {
 923         /* Huawei ME906 and ME909 */
 924         USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0x15c1, USB_CLASS_COMM,
 925                                       USB_CDC_SUBCLASS_ETHERNET,
 926                                       USB_CDC_PROTO_NONE),
 927         .driver_info = (unsigned long)&wwan_info,
 928 }, {
 929         /* ZTE modules */
 930         USB_VENDOR_AND_INTERFACE_INFO(ZTE_VENDOR_ID, USB_CLASS_COMM,
 931                                       USB_CDC_SUBCLASS_ETHERNET,
 932                                       USB_CDC_PROTO_NONE),
 933         .driver_info = (unsigned long)&zte_cdc_info,
 934 }, {
 935         /* U-blox TOBY-L2 */
 936         USB_DEVICE_AND_INTERFACE_INFO(UBLOX_VENDOR_ID, 0x1143, USB_CLASS_COMM,
 937                                       USB_CDC_SUBCLASS_ETHERNET,
 938                                       USB_CDC_PROTO_NONE),
 939         .driver_info = (unsigned long)&wwan_info,
 940 }, {
 941         /* U-blox SARA-U2 */
 942         USB_DEVICE_AND_INTERFACE_INFO(UBLOX_VENDOR_ID, 0x1104, USB_CLASS_COMM,
 943                                       USB_CDC_SUBCLASS_ETHERNET,
 944                                       USB_CDC_PROTO_NONE),
 945         .driver_info = (unsigned long)&wwan_info,
 946 }, {
 947         /* Cinterion PLS8 modem by GEMALTO */
 948         USB_DEVICE_AND_INTERFACE_INFO(0x1e2d, 0x0061, USB_CLASS_COMM,
 949                                       USB_CDC_SUBCLASS_ETHERNET,
 950                                       USB_CDC_PROTO_NONE),
 951         .driver_info = (unsigned long)&wwan_info,
 952 }, {
 953         /* Cinterion AHS3 modem by GEMALTO */
 954         USB_DEVICE_AND_INTERFACE_INFO(0x1e2d, 0x0055, USB_CLASS_COMM,
 955                                       USB_CDC_SUBCLASS_ETHERNET,
 956                                       USB_CDC_PROTO_NONE),
 957         .driver_info = (unsigned long)&wwan_info,
 958 }, {
 959         USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ETHERNET,
 960                         USB_CDC_PROTO_NONE),
 961         .driver_info = (unsigned long) &cdc_info,
 962 }, {
 963         USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_MDLM,
 964                         USB_CDC_PROTO_NONE),
 965         .driver_info = (unsigned long)&wwan_info,
 966
 967 }, {
 968         /* Various Huawei modems with a network port like the UMG1831 */
 969         USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_COMM,
 970                                       USB_CDC_SUBCLASS_ETHERNET, 255),
 971         .driver_info = (unsigned long)&wwan_info,
 972 },
 973         { },            /* END */
 974 };
 975 MODULE_DEVICE_TABLE(usb, products);
 976
 977 static struct usb_driver cdc_driver = {
 978         .name =         "cdc_ether",
 979         .id_table =     products,
 980         .probe =        usbnet_probe,
 981         .disconnect =   usbnet_disconnect,
 982         .suspend =      usbnet_suspend,
 983         .resume =       usbnet_resume,
 984         .reset_resume = usbnet_resume,
 985         .supports_autosuspend = 1,
 986         .disable_hub_initiated_lpm = 1,
 987 };
 988
 989 module_usb_driver(cdc_driver);
 990
 991 MODULE_AUTHOR("David Brownell");
 992 MODULE_DESCRIPTION("USB CDC Ethernet devices");
 993 MODULE_LICENSE("GPL");