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 void usbnet_cdc_update_filter(struct usbnet *dev)
  67 {
  68         struct net_device       *net = dev->net;
  69
  70         u16 cdc_filter = USB_CDC_PACKET_TYPE_DIRECTED
  71                         | USB_CDC_PACKET_TYPE_BROADCAST;
  72
  73         /* filtering on the device is an optional feature and not worth
  74          * the hassle so we just roughly care about snooping and if any
  75          * multicast is requested, we take every multicast
  76          */
  77         if (net->flags & IFF_PROMISC)
  78                 cdc_filter |= USB_CDC_PACKET_TYPE_PROMISCUOUS;
  79         if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI))
  80                 cdc_filter |= USB_CDC_PACKET_TYPE_ALL_MULTICAST;
  81
  82         usb_control_msg(dev->udev,
  83                         usb_sndctrlpipe(dev->udev, 0),
  84                         USB_CDC_SET_ETHERNET_PACKET_FILTER,
  85                         USB_TYPE_CLASS | USB_RECIP_INTERFACE,
  86                         cdc_filter,
  87                         dev->intf->cur_altsetting->desc.bInterfaceNumber,
  88                         NULL,
  89                         0,
  90                         USB_CTRL_SET_TIMEOUT
  91                 );
  92 }
  93 EXPORT_SYMBOL_GPL(usbnet_cdc_update_filter);
  94
  95 /* probes control interface, claims data interface, collects the bulk
  96  * endpoints, activates data interface (if needed), maybe sets MTU.
  97  * all pure cdc, except for certain firmware workarounds, and knowing
  98  * that rndis uses one different rule.
  99  */
 100 int usbnet_generic_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
 101 {
 102         u8                              *buf = intf->cur_altsetting->extra;
 103         int                             len = intf->cur_altsetting->extralen;
 104         struct usb_interface_descriptor *d;
 105         struct cdc_state                *info = (void *) &dev->data;
 106         int                             status;
 107         int                             rndis;
 108         bool                            android_rndis_quirk = false;
 109         struct usb_driver               *driver = driver_of(intf);
 110         struct usb_cdc_parsed_header header;
 111
 112         if (sizeof(dev->data) < sizeof(*info))
 113                 return -EDOM;
 114
 115         /* expect strict spec conformance for the descriptors, but
 116          * cope with firmware which stores them in the wrong place
 117          */
 118         if (len == 0 && dev->udev->actconfig->extralen) {
 119                 /* Motorola SB4100 (and others: Brad Hards says it's
 120                  * from a Broadcom design) put CDC descriptors here
 121                  */
 122                 buf = dev->udev->actconfig->extra;
 123                 len = dev->udev->actconfig->extralen;
 124                 dev_dbg(&intf->dev, "CDC descriptors on config\n");
 125         }
 126
 127         /* Maybe CDC descriptors are after the endpoint?  This bug has
 128          * been seen on some 2Wire Inc RNDIS-ish products.
 129          */
 130         if (len == 0) {
 131                 struct usb_host_endpoint        *hep;
 132
 133                 hep = intf->cur_altsetting->endpoint;
 134                 if (hep) {
 135                         buf = hep->extra;
 136                         len = hep->extralen;
 137                 }
 138                 if (len)
 139                         dev_dbg(&intf->dev,
 140                                 "CDC descriptors on endpoint\n");
 141         }
 142
 143         /* this assumes that if there's a non-RNDIS vendor variant
 144          * of cdc-acm, it'll fail RNDIS requests cleanly.
 145          */
 146         rndis = (is_rndis(&intf->cur_altsetting->desc) ||
 147                  is_activesync(&intf->cur_altsetting->desc) ||
 148                  is_wireless_rndis(&intf->cur_altsetting->desc) ||
 149                  is_novatel_rndis(&intf->cur_altsetting->desc));
 150
 151         memset(info, 0, sizeof(*info));
 152         info->control = intf;
 153
 154         cdc_parse_cdc_header(&header, intf, buf, len);
 155
 156         info->u = header.usb_cdc_union_desc;
 157         info->header = header.usb_cdc_header_desc;
 158         info->ether = header.usb_cdc_ether_desc;
 159         if (!info->u) {
 160                 if (rndis)
 161                         goto skip;
 162                 else /* in that case a quirk is mandatory */
 163                         goto bad_desc;
 164         }
 165         /* we need a master/control interface (what we're
 166          * probed with) and a slave/data interface; union
 167          * descriptors sort this all out.
 168          */
 169         info->control = usb_ifnum_to_if(dev->udev, info->u->bMasterInterface0);
 170         info->data = usb_ifnum_to_if(dev->udev, info->u->bSlaveInterface0);
 171         if (!info->control || !info->data) {
 172                 dev_dbg(&intf->dev,
 173                         "master #%u/%p slave #%u/%p\n",
 174                         info->u->bMasterInterface0,
 175                         info->control,
 176                         info->u->bSlaveInterface0,
 177                         info->data);
 178                 /* fall back to hard-wiring for RNDIS */
 179                 if (rndis) {
 180                         android_rndis_quirk = true;
 181                         goto skip;
 182                 }
 183                 goto bad_desc;
 184         }
 185         if (info->control != intf) {
 186                 dev_dbg(&intf->dev, "bogus CDC Union\n");
 187                 /* Ambit USB Cable Modem (and maybe others)
 188                  * interchanges master and slave interface.
 189                  */
 190                 if (info->data == intf) {
 191                         info->data = info->control;
 192                         info->control = intf;
 193                 } else
 194                         goto bad_desc;
 195         }
 196
 197         /* some devices merge these - skip class check */
 198         if (info->control == info->data)
 199                 goto skip;
 200
 201         /* a data interface altsetting does the real i/o */
 202         d = &info->data->cur_altsetting->desc;
 203         if (d->bInterfaceClass != USB_CLASS_CDC_DATA) {
 204                 dev_dbg(&intf->dev, "slave class %u\n", d->bInterfaceClass);
 205                 goto bad_desc;
 206         }
 207 skip:
 208         /* Communcation class functions with bmCapabilities are not
 209          * RNDIS.  But some Wireless class RNDIS functions use
 210          * bmCapabilities for their own purpose. The failsafe is
 211          * therefore applied only to Communication class RNDIS
 212          * functions.  The rndis test is redundant, but a cheap
 213          * optimization.
 214          */
 215         if (rndis && is_rndis(&intf->cur_altsetting->desc) &&
 216             header.usb_cdc_acm_descriptor &&
 217             header.usb_cdc_acm_descriptor->bmCapabilities) {
 218                 dev_dbg(&intf->dev,
 219                         "ACM capabilities %02x, not really RNDIS?\n",
 220                         header.usb_cdc_acm_descriptor->bmCapabilities);
 221                 goto bad_desc;
 222         }
 223
 224         if (header.usb_cdc_ether_desc && info->ether->wMaxSegmentSize) {
 225                 dev->hard_mtu = le16_to_cpu(info->ether->wMaxSegmentSize);
 226                 /* because of Zaurus, we may be ignoring the host
 227                  * side link address we were given.
 228                  */
 229         }
 230
 231         if (header.usb_cdc_mdlm_desc &&
 232             memcmp(header.usb_cdc_mdlm_desc->bGUID, mbm_guid, 16)) {
 233                 dev_dbg(&intf->dev, "GUID doesn't match\n");
 234                 goto bad_desc;
 235         }
 236
 237         if (header.usb_cdc_mdlm_detail_desc &&
 238                 header.usb_cdc_mdlm_detail_desc->bLength <
 239                         (sizeof(struct usb_cdc_mdlm_detail_desc) + 1)) {
 240                 dev_dbg(&intf->dev, "Descriptor too short\n");
 241                 goto bad_desc;
 242         }
 243
 244
 245
 246         /* Microsoft ActiveSync based and some regular RNDIS devices lack the
 247          * CDC descriptors, so we'll hard-wire the interfaces and not check
 248          * for descriptors.
 249          *
 250          * Some Android RNDIS devices have a CDC Union descriptor pointing
 251          * to non-existing interfaces.  Ignore that and attempt the same
 252          * hard-wired 0 and 1 interfaces.
 253          */
 254         if (rndis && (!info->u || android_rndis_quirk)) {
 255                 info->control = usb_ifnum_to_if(dev->udev, 0);
 256                 info->data = usb_ifnum_to_if(dev->udev, 1);
 257                 if (!info->control || !info->data || info->control != intf) {
 258                         dev_dbg(&intf->dev,
 259                                 "rndis: master #0/%p slave #1/%p\n",
 260                                 info->control,
 261                                 info->data);
 262                         goto bad_desc;
 263                 }
 264
 265         } else if (!info->header || (!rndis && !info->ether)) {
 266                 dev_dbg(&intf->dev, "missing cdc %s%s%sdescriptor\n",
 267                         info->header ? "" : "header ",
 268                         info->u ? "" : "union ",
 269                         info->ether ? "" : "ether ");
 270                 goto bad_desc;
 271         }
 272
 273         /* claim data interface and set it up ... with side effects.
 274          * network traffic can't flow until an altsetting is enabled.
 275          */
 276         if (info->data != info->control) {
 277                 status = usb_driver_claim_interface(driver, info->data, dev);
 278                 if (status < 0)
 279                         return status;
 280         }
 281         status = usbnet_get_endpoints(dev, info->data);
 282         if (status < 0) {
 283                 /* ensure immediate exit from usbnet_disconnect */
 284                 usb_set_intfdata(info->data, NULL);
 285                 if (info->data != info->control)
 286                         usb_driver_release_interface(driver, info->data);
 287                 return status;
 288         }
 289
 290         /* status endpoint: optional for CDC Ethernet, not RNDIS (or ACM) */
 291         if (info->data != info->control)
 292                 dev->status = NULL;
 293         if (info->control->cur_altsetting->desc.bNumEndpoints == 1) {
 294                 struct usb_endpoint_descriptor  *desc;
 295
 296                 dev->status = &info->control->cur_altsetting->endpoint[0];
 297                 desc = &dev->status->desc;
 298                 if (!usb_endpoint_is_int_in(desc) ||
 299                     (le16_to_cpu(desc->wMaxPacketSize)
 300                      < sizeof(struct usb_cdc_notification)) ||
 301                     !desc->bInterval) {
 302                         dev_dbg(&intf->dev, "bad notification endpoint\n");
 303                         dev->status = NULL;
 304                 }
 305         }
 306         if (rndis && !dev->status) {
 307                 dev_dbg(&intf->dev, "missing RNDIS status endpoint\n");
 308                 usb_set_intfdata(info->data, NULL);
 309                 usb_driver_release_interface(driver, info->data);
 310                 return -ENODEV;
 311         }
 312
 313         return 0;
 314
 315 bad_desc:
 316         dev_info(&dev->udev->dev, "bad CDC descriptors\n");
 317         return -ENODEV;
 318 }
 319 EXPORT_SYMBOL_GPL(usbnet_generic_cdc_bind);
 320
 321
 322 /* like usbnet_generic_cdc_bind() but handles filter initialization
 323  * correctly
 324  */
 325 int usbnet_ether_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
 326 {
 327         int rv;
 328
 329         rv = usbnet_generic_cdc_bind(dev, intf);
 330         if (rv < 0)
 331                 goto bail_out;
 332
 333         /* Some devices don't initialise properly. In particular
 334          * the packet filter is not reset. There are devices that
 335          * don't do reset all the way. So the packet filter should
 336          * be set to a sane initial value.
 337          */
 338         usbnet_cdc_update_filter(dev);
 339
 340 bail_out:
 341         return rv;
 342 }
 343 EXPORT_SYMBOL_GPL(usbnet_ether_cdc_bind);
 344
 345 void usbnet_cdc_unbind(struct usbnet *dev, struct usb_interface *intf)
 346 {
 347         struct cdc_state                *info = (void *) &dev->data;
 348         struct usb_driver               *driver = driver_of(intf);
 349
 350         /* combined interface - nothing  to do */
 351         if (info->data == info->control)
 352                 return;
 353
 354         /* disconnect master --> disconnect slave */
 355         if (intf == info->control && info->data) {
 356                 /* ensure immediate exit from usbnet_disconnect */
 357                 usb_set_intfdata(info->data, NULL);
 358                 usb_driver_release_interface(driver, info->data);
 359                 info->data = NULL;
 360         }
 361
 362         /* and vice versa (just in case) */
 363         else if (intf == info->data && info->control) {
 364                 /* ensure immediate exit from usbnet_disconnect */
 365                 usb_set_intfdata(info->control, NULL);
 366                 usb_driver_release_interface(driver, info->control);
 367                 info->control = NULL;
 368         }
 369 }
 370 EXPORT_SYMBOL_GPL(usbnet_cdc_unbind);
 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 static void dumpspeed(struct usbnet *dev, __le32 *speeds)
 383 {
 384         netif_info(dev, timer, dev->net,
 385                    "link speeds: %u kbps up, %u kbps down\n",
 386                    __le32_to_cpu(speeds[0]) / 1000,
 387                    __le32_to_cpu(speeds[1]) / 1000);
 388 }
 389
 390 void usbnet_cdc_status(struct usbnet *dev, struct urb *urb)
 391 {
 392         struct usb_cdc_notification     *event;
 393
 394         if (urb->actual_length < sizeof(*event))
 395                 return;
 396
 397         /* SPEED_CHANGE can get split into two 8-byte packets */
 398         if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
 399                 dumpspeed(dev, (__le32 *) urb->transfer_buffer);
 400                 return;
 401         }
 402
 403         event = urb->transfer_buffer;
 404         switch (event->bNotificationType) {
 405         case USB_CDC_NOTIFY_NETWORK_CONNECTION:
 406                 netif_dbg(dev, timer, dev->net, "CDC: carrier %s\n",
 407                           event->wValue ? "on" : "off");
 408                 usbnet_link_change(dev, !!event->wValue, 0);
 409                 break;
 410         case USB_CDC_NOTIFY_SPEED_CHANGE:       /* tx/rx rates */
 411                 netif_dbg(dev, timer, dev->net, "CDC: speed change (len %d)\n",
 412                           urb->actual_length);
 413                 if (urb->actual_length != (sizeof(*event) + 8))
 414                         set_bit(EVENT_STS_SPLIT, &dev->flags);
 415                 else
 416                         dumpspeed(dev, (__le32 *) &event[1]);
 417                 break;
 418         /* USB_CDC_NOTIFY_RESPONSE_AVAILABLE can happen too (e.g. RNDIS),
 419          * but there are no standard formats for the response data.
 420          */
 421         default:
 422                 netdev_err(dev->net, "CDC: unexpected notification %02x!\n",
 423                            event->bNotificationType);
 424                 break;
 425         }
 426 }
 427 EXPORT_SYMBOL_GPL(usbnet_cdc_status);
 428
 429 int usbnet_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
 430 {
 431         int                             status;
 432         struct cdc_state                *info = (void *) &dev->data;
 433
 434         BUILD_BUG_ON((sizeof(((struct usbnet *)0)->data)
 435                         < sizeof(struct cdc_state)));
 436
 437         status = usbnet_ether_cdc_bind(dev, intf);
 438         if (status < 0)
 439                 return status;
 440
 441         status = usbnet_get_ethernet_addr(dev, info->ether->iMACAddress);
 442         if (status < 0) {
 443                 usb_set_intfdata(info->data, NULL);
 444                 usb_driver_release_interface(driver_of(intf), info->data);
 445                 return status;
 446         }
 447
 448         return 0;
 449 }
 450 EXPORT_SYMBOL_GPL(usbnet_cdc_bind);
 451
 452 static int usbnet_cdc_zte_bind(struct usbnet *dev, struct usb_interface *intf)
 453 {
 454         int status = usbnet_cdc_bind(dev, intf);
 455
 456         if (!status && (dev->net->dev_addr[0] & 0x02))
 457                 eth_hw_addr_random(dev->net);
 458
 459         return status;
 460 }
 461
 462 /* Make sure packets have correct destination MAC address
 463  *
 464  * A firmware bug observed on some devices (ZTE MF823/831/910) is that the
 465  * device sends packets with a static, bogus, random MAC address (event if
 466  * device MAC address has been updated). Always set MAC address to that of the
 467  * device.
 468  */
 469 static int usbnet_cdc_zte_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 470 {
 471         if (skb->len < ETH_HLEN || !(skb->data[0] & 0x02))
 472                 return 1;
 473
 474         skb_reset_mac_header(skb);
 475         ether_addr_copy(eth_hdr(skb)->h_dest, dev->net->dev_addr);
 476
 477         return 1;
 478 }
 479
 480 /* Ensure correct link state
 481  *
 482  * Some devices (ZTE MF823/831/910) export two carrier on notifications when
 483  * connected. This causes the link state to be incorrect. Work around this by
 484  * always setting the state to off, then on.
 485  */
 486 static void usbnet_cdc_zte_status(struct usbnet *dev, struct urb *urb)
 487 {
 488         struct usb_cdc_notification *event;
 489
 490         if (urb->actual_length < sizeof(*event))
 491                 return;
 492
 493         event = urb->transfer_buffer;
 494
 495         if (event->bNotificationType != USB_CDC_NOTIFY_NETWORK_CONNECTION) {
 496                 usbnet_cdc_status(dev, urb);
 497                 return;
 498         }
 499
 500         netif_dbg(dev, timer, dev->net, "CDC: carrier %s\n",
 501                   event->wValue ? "on" : "off");
 502
 503         if (event->wValue &&
 504             netif_carrier_ok(dev->net))
 505                 netif_carrier_off(dev->net);
 506
 507         usbnet_link_change(dev, !!event->wValue, 0);
 508 }
 509
 510 static const struct driver_info cdc_info = {
 511         .description =  "CDC Ethernet Device",
 512         .flags =        FLAG_ETHER | FLAG_POINTTOPOINT,
 513         .bind =         usbnet_cdc_bind,
 514         .unbind =       usbnet_cdc_unbind,
 515         .status =       usbnet_cdc_status,
 516         .set_rx_mode =  usbnet_cdc_update_filter,
 517         .manage_power = usbnet_manage_power,
 518 };
 519
 520 static const struct driver_info zte_cdc_info = {
 521         .description =  "ZTE CDC Ethernet Device",
 522         .flags =        FLAG_ETHER | FLAG_POINTTOPOINT,
 523         .bind =         usbnet_cdc_zte_bind,
 524         .unbind =       usbnet_cdc_unbind,
 525         .status =       usbnet_cdc_zte_status,
 526         .set_rx_mode =  usbnet_cdc_update_filter,
 527         .manage_power = usbnet_manage_power,
 528         .rx_fixup = usbnet_cdc_zte_rx_fixup,
 529 };
 530
 531 static const struct driver_info wwan_info = {
 532         .description =  "Mobile Broadband Network Device",
 533         .flags =        FLAG_WWAN,
 534         .bind =         usbnet_cdc_bind,
 535         .unbind =       usbnet_cdc_unbind,
 536         .status =       usbnet_cdc_status,
 537         .set_rx_mode =  usbnet_cdc_update_filter,
 538         .manage_power = usbnet_manage_power,
 539 };
 540
 541 /*-------------------------------------------------------------------------*/
 542
 543 #define HUAWEI_VENDOR_ID        0x12D1
 544 #define NOVATEL_VENDOR_ID       0x1410
 545 #define ZTE_VENDOR_ID           0x19D2
 546 #define DELL_VENDOR_ID          0x413C
 547 #define REALTEK_VENDOR_ID       0x0bda
 548 #define SAMSUNG_VENDOR_ID       0x04e8
 549 #define LENOVO_VENDOR_ID        0x17ef
 550 #define LINKSYS_VENDOR_ID       0x13b1
 551 #define NVIDIA_VENDOR_ID        0x0955
 552 #define HP_VENDOR_ID            0x03f0
 553 #define MICROSOFT_VENDOR_ID     0x045e
 554 #define UBLOX_VENDOR_ID         0x1546
 555 #define TPLINK_VENDOR_ID        0x2357
 556 #define AQUANTIA_VENDOR_ID      0x2eca
 557 #define ASIX_VENDOR_ID          0x0b95
 558
 559 static const struct usb_device_id       products[] = {
 560 /* BLACKLIST !!
 561  *
 562  * First blacklist any products that are egregiously nonconformant
 563  * with the CDC Ethernet specs.  Minor braindamage we cope with; when
 564  * they're not even trying, needing a separate driver is only the first
 565  * of the differences to show up.
 566  */
 567
 568 #define ZAURUS_MASTER_INTERFACE \
 569         .bInterfaceClass        = USB_CLASS_COMM, \
 570         .bInterfaceSubClass     = USB_CDC_SUBCLASS_ETHERNET, \
 571         .bInterfaceProtocol     = USB_CDC_PROTO_NONE
 572
 573 /* SA-1100 based Sharp Zaurus ("collie"), or compatible;
 574  * wire-incompatible with true CDC Ethernet implementations.
 575  * (And, it seems, needlessly so...)
 576  */
 577 {
 578         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 579                           | USB_DEVICE_ID_MATCH_DEVICE,
 580         .idVendor               = 0x04DD,
 581         .idProduct              = 0x8004,
 582         ZAURUS_MASTER_INTERFACE,
 583         .driver_info            = 0,
 584 },
 585
 586 /* PXA-25x based Sharp Zaurii.  Note that it seems some of these
 587  * (later models especially) may have shipped only with firmware
 588  * advertising false "CDC MDLM" compatibility ... but we're not
 589  * clear which models did that, so for now let's assume the worst.
 590  */
 591 {
 592         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 593                           | USB_DEVICE_ID_MATCH_DEVICE,
 594         .idVendor               = 0x04DD,
 595         .idProduct              = 0x8005,       /* A-300 */
 596         ZAURUS_MASTER_INTERFACE,
 597         .driver_info            = 0,
 598 }, {
 599         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 600                           | USB_DEVICE_ID_MATCH_DEVICE,
 601         .idVendor               = 0x04DD,
 602         .idProduct              = 0x8006,       /* B-500/SL-5600 */
 603         ZAURUS_MASTER_INTERFACE,
 604         .driver_info            = 0,
 605 }, {
 606         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 607                           | USB_DEVICE_ID_MATCH_DEVICE,
 608         .idVendor               = 0x04DD,
 609         .idProduct              = 0x8007,       /* C-700 */
 610         ZAURUS_MASTER_INTERFACE,
 611         .driver_info            = 0,
 612 }, {
 613         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 614                  | USB_DEVICE_ID_MATCH_DEVICE,
 615         .idVendor               = 0x04DD,
 616         .idProduct              = 0x9031,       /* C-750 C-760 */
 617         ZAURUS_MASTER_INTERFACE,
 618         .driver_info            = 0,
 619 }, {
 620         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 621                  | USB_DEVICE_ID_MATCH_DEVICE,
 622         .idVendor               = 0x04DD,
 623         .idProduct              = 0x9032,       /* SL-6000 */
 624         ZAURUS_MASTER_INTERFACE,
 625         .driver_info            = 0,
 626 }, {
 627         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 628                  | USB_DEVICE_ID_MATCH_DEVICE,
 629         .idVendor               = 0x04DD,
 630         /* reported with some C860 units */
 631         .idProduct              = 0x9050,       /* C-860 */
 632         ZAURUS_MASTER_INTERFACE,
 633         .driver_info            = 0,
 634 },
 635
 636 /* Olympus has some models with a Zaurus-compatible option.
 637  * R-1000 uses a FreeScale i.MXL cpu (ARMv4T)
 638  */
 639 {
 640         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
 641                  | USB_DEVICE_ID_MATCH_DEVICE,
 642         .idVendor               = 0x07B4,
 643         .idProduct              = 0x0F02,       /* R-1000 */
 644         ZAURUS_MASTER_INTERFACE,
 645         .driver_info            = 0,
 646 },
 647
 648 /* LG Electronics VL600 wants additional headers on every frame */
 649 {
 650         USB_DEVICE_AND_INTERFACE_INFO(0x1004, 0x61aa, USB_CLASS_COMM,
 651                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 652         .driver_info = 0,
 653 },
 654
 655 /* Logitech Harmony 900 - uses the pseudo-MDLM (BLAN) driver */
 656 {
 657         USB_DEVICE_AND_INTERFACE_INFO(0x046d, 0xc11f, USB_CLASS_COMM,
 658                         USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
 659         .driver_info            = 0,
 660 },
 661
 662 /* Novatel USB551L and MC551 - handled by qmi_wwan */
 663 {
 664         USB_DEVICE_AND_INTERFACE_INFO(NOVATEL_VENDOR_ID, 0xB001, USB_CLASS_COMM,
 665                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 666         .driver_info = 0,
 667 },
 668
 669 /* Novatel E362 - handled by qmi_wwan */
 670 {
 671         USB_DEVICE_AND_INTERFACE_INFO(NOVATEL_VENDOR_ID, 0x9010, USB_CLASS_COMM,
 672                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 673         .driver_info = 0,
 674 },
 675
 676 /* Dell Wireless 5800 (Novatel E362) - handled by qmi_wwan */
 677 {
 678         USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x8195, USB_CLASS_COMM,
 679                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 680         .driver_info = 0,
 681 },
 682
 683 /* Dell Wireless 5800 (Novatel E362) - handled by qmi_wwan */
 684 {
 685         USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x8196, USB_CLASS_COMM,
 686                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 687         .driver_info = 0,
 688 },
 689
 690 /* Dell Wireless 5804 (Novatel E371) - handled by qmi_wwan */
 691 {
 692         USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x819b, USB_CLASS_COMM,
 693                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 694         .driver_info = 0,
 695 },
 696
 697 /* Novatel Expedite E371 - handled by qmi_wwan */
 698 {
 699         USB_DEVICE_AND_INTERFACE_INFO(NOVATEL_VENDOR_ID, 0x9011, USB_CLASS_COMM,
 700                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 701         .driver_info = 0,
 702 },
 703
 704 /* HP lt2523 (Novatel E371) - handled by qmi_wwan */
 705 {
 706         USB_DEVICE_AND_INTERFACE_INFO(HP_VENDOR_ID, 0x421d, USB_CLASS_COMM,
 707                                       USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 708         .driver_info = 0,
 709 },
 710
 711 /* AnyDATA ADU960S - handled by qmi_wwan */
 712 {
 713         USB_DEVICE_AND_INTERFACE_INFO(0x16d5, 0x650a, USB_CLASS_COMM,
 714                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 715         .driver_info = 0,
 716 },
 717
 718 /* Huawei E1820 - handled by qmi_wwan */
 719 {
 720         USB_DEVICE_INTERFACE_NUMBER(HUAWEI_VENDOR_ID, 0x14ac, 1),
 721         .driver_info = 0,
 722 },
 723
 724 /* Realtek RTL8152 Based USB 2.0 Ethernet Adapters */
 725 {
 726         USB_DEVICE_AND_INTERFACE_INFO(REALTEK_VENDOR_ID, 0x8152, USB_CLASS_COMM,
 727                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 728         .driver_info = 0,
 729 },
 730
 731 /* Realtek RTL8153 Based USB 3.0 Ethernet Adapters */
 732 {
 733         USB_DEVICE_AND_INTERFACE_INFO(REALTEK_VENDOR_ID, 0x8153, USB_CLASS_COMM,
 734                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 735         .driver_info = 0,
 736 },
 737
 738 /* Samsung USB Ethernet Adapters */
 739 {
 740         USB_DEVICE_AND_INTERFACE_INFO(SAMSUNG_VENDOR_ID, 0xa101, USB_CLASS_COMM,
 741                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 742         .driver_info = 0,
 743 },
 744
 745 #if IS_ENABLED(CONFIG_USB_RTL8152)
 746 /* Linksys USB3GIGV1 Ethernet Adapter */
 747 {
 748         USB_DEVICE_AND_INTERFACE_INFO(LINKSYS_VENDOR_ID, 0x0041, USB_CLASS_COMM,
 749                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 750         .driver_info = 0,
 751 },
 752 #endif
 753
 754 /* ThinkPad USB-C Dock (based on Realtek RTL8153) */
 755 {
 756         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x3062, USB_CLASS_COMM,
 757                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 758         .driver_info = 0,
 759 },
 760
 761 /* ThinkPad Thunderbolt 3 Dock (based on Realtek RTL8153) */
 762 {
 763         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x3069, USB_CLASS_COMM,
 764                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 765         .driver_info = 0,
 766 },
 767
 768 /* ThinkPad Thunderbolt 3 Dock Gen 2 (based on Realtek RTL8153) */
 769 {
 770         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x3082, USB_CLASS_COMM,
 771                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 772         .driver_info = 0,
 773 },
 774
 775 /* Lenovo Thinkpad USB 3.0 Ethernet Adapters (based on Realtek RTL8153) */
 776 {
 777         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x7205, USB_CLASS_COMM,
 778                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 779         .driver_info = 0,
 780 },
 781
 782 /* Lenovo USB C to Ethernet Adapter (based on Realtek RTL8153) */
 783 {
 784         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x720c, USB_CLASS_COMM,
 785                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 786         .driver_info = 0,
 787 },
 788
 789 /* Lenovo USB-C Travel Hub (based on Realtek RTL8153) */
 790 {
 791         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x7214, USB_CLASS_COMM,
 792                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 793         .driver_info = 0,
 794 },
 795
 796 /* ThinkPad USB-C Dock Gen 2 (based on Realtek RTL8153) */
 797 {
 798         USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0xa387, USB_CLASS_COMM,
 799                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 800         .driver_info = 0,
 801 },
 802
 803 /* NVIDIA Tegra USB 3.0 Ethernet Adapters (based on Realtek RTL8153) */
 804 {
 805         USB_DEVICE_AND_INTERFACE_INFO(NVIDIA_VENDOR_ID, 0x09ff, USB_CLASS_COMM,
 806                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 807         .driver_info = 0,
 808 },
 809
 810 /* Microsoft Surface 2 dock (based on Realtek RTL8152) */
 811 {
 812         USB_DEVICE_AND_INTERFACE_INFO(MICROSOFT_VENDOR_ID, 0x07ab, USB_CLASS_COMM,
 813                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 814         .driver_info = 0,
 815 },
 816
 817 /* Microsoft Surface Ethernet Adapter (based on Realtek RTL8153) */
 818 {
 819         USB_DEVICE_AND_INTERFACE_INFO(MICROSOFT_VENDOR_ID, 0x07c6, USB_CLASS_COMM,
 820                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 821         .driver_info = 0,
 822 },
 823
 824 /* Microsoft Surface Ethernet Adapter (based on Realtek RTL8153B) */
 825 {
 826         USB_DEVICE_AND_INTERFACE_INFO(MICROSOFT_VENDOR_ID, 0x0927, USB_CLASS_COMM,
 827                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 828         .driver_info = 0,
 829 },
 830
 831 /* TP-LINK UE300 USB 3.0 Ethernet Adapters (based on Realtek RTL8153) */
 832 {
 833         USB_DEVICE_AND_INTERFACE_INFO(TPLINK_VENDOR_ID, 0x0601, USB_CLASS_COMM,
 834                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 835         .driver_info = 0,
 836 },
 837
 838 /* Aquantia AQtion USB to 5GbE Controller (based on AQC111U) */
 839 {
 840         USB_DEVICE_AND_INTERFACE_INFO(AQUANTIA_VENDOR_ID, 0xc101,
 841                                       USB_CLASS_COMM, USB_CDC_SUBCLASS_ETHERNET,
 842                                       USB_CDC_PROTO_NONE),
 843         .driver_info = 0,
 844 },
 845
 846 /* ASIX USB 3.1 Gen1 to 5G Multi-Gigabit Ethernet Adapter(based on AQC111U) */
 847 {
 848         USB_DEVICE_AND_INTERFACE_INFO(ASIX_VENDOR_ID, 0x2790, USB_CLASS_COMM,
 849                                       USB_CDC_SUBCLASS_ETHERNET,
 850                                       USB_CDC_PROTO_NONE),
 851         .driver_info = 0,
 852 },
 853
 854 /* ASIX USB 3.1 Gen1 to 2.5G Multi-Gigabit Ethernet Adapter(based on AQC112U) */
 855 {
 856         USB_DEVICE_AND_INTERFACE_INFO(ASIX_VENDOR_ID, 0x2791, USB_CLASS_COMM,
 857                                       USB_CDC_SUBCLASS_ETHERNET,
 858                                       USB_CDC_PROTO_NONE),
 859         .driver_info = 0,
 860 },
 861
 862 /* USB-C 3.1 to 5GBASE-T Ethernet Adapter (based on AQC111U) */
 863 {
 864         USB_DEVICE_AND_INTERFACE_INFO(0x20f4, 0xe05a, USB_CLASS_COMM,
 865                                       USB_CDC_SUBCLASS_ETHERNET,
 866                                       USB_CDC_PROTO_NONE),
 867         .driver_info = 0,
 868 },
 869
 870 /* QNAP QNA-UC5G1T USB to 5GbE Adapter (based on AQC111U) */
 871 {
 872         USB_DEVICE_AND_INTERFACE_INFO(0x1c04, 0x0015, USB_CLASS_COMM,
 873                                       USB_CDC_SUBCLASS_ETHERNET,
 874                                       USB_CDC_PROTO_NONE),
 875         .driver_info = 0,
 876 },
 877
 878 /* WHITELIST!!!
 879  *
 880  * CDC Ether uses two interfaces, not necessarily consecutive.
 881  * We match the main interface, ignoring the optional device
 882  * class so we could handle devices that aren't exclusively
 883  * CDC ether.
 884  *
 885  * NOTE:  this match must come AFTER entries blacklisting devices
 886  * because of bugs/quirks in a given product (like Zaurus, above).
 887  */
 888 {
 889         /* ZTE (Vodafone) K3805-Z */
 890         USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1003, USB_CLASS_COMM,
 891                                       USB_CDC_SUBCLASS_ETHERNET,
 892                                       USB_CDC_PROTO_NONE),
 893         .driver_info = (unsigned long)&wwan_info,
 894 }, {
 895         /* ZTE (Vodafone) K3806-Z */
 896         USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1015, USB_CLASS_COMM,
 897                                       USB_CDC_SUBCLASS_ETHERNET,
 898                                       USB_CDC_PROTO_NONE),
 899         .driver_info = (unsigned long)&wwan_info,
 900 }, {
 901         /* ZTE (Vodafone) K4510-Z */
 902         USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1173, USB_CLASS_COMM,
 903                                       USB_CDC_SUBCLASS_ETHERNET,
 904                                       USB_CDC_PROTO_NONE),
 905         .driver_info = (unsigned long)&wwan_info,
 906 }, {
 907         /* ZTE (Vodafone) K3770-Z */
 908         USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1177, USB_CLASS_COMM,
 909                                       USB_CDC_SUBCLASS_ETHERNET,
 910                                       USB_CDC_PROTO_NONE),
 911         .driver_info = (unsigned long)&wwan_info,
 912 }, {
 913         /* ZTE (Vodafone) K3772-Z */
 914         USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1181, USB_CLASS_COMM,
 915                                       USB_CDC_SUBCLASS_ETHERNET,
 916                                       USB_CDC_PROTO_NONE),
 917         .driver_info = (unsigned long)&wwan_info,
 918 }, {
 919         /* Telit modules */
 920         USB_VENDOR_AND_INTERFACE_INFO(0x1bc7, USB_CLASS_COMM,
 921                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 922         .driver_info = (kernel_ulong_t) &wwan_info,
 923 }, {
 924         /* Dell DW5580 modules */
 925         USB_DEVICE_AND_INTERFACE_INFO(DELL_VENDOR_ID, 0x81ba, USB_CLASS_COMM,
 926                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 927         .driver_info = (kernel_ulong_t)&wwan_info,
 928 }, {
 929         /* Huawei ME906 and ME909 */
 930         USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0x15c1, USB_CLASS_COMM,
 931                                       USB_CDC_SUBCLASS_ETHERNET,
 932                                       USB_CDC_PROTO_NONE),
 933         .driver_info = (unsigned long)&wwan_info,
 934 }, {
 935         /* ZTE modules */
 936         USB_VENDOR_AND_INTERFACE_INFO(ZTE_VENDOR_ID, USB_CLASS_COMM,
 937                                       USB_CDC_SUBCLASS_ETHERNET,
 938                                       USB_CDC_PROTO_NONE),
 939         .driver_info = (unsigned long)&zte_cdc_info,
 940 }, {
 941         /* U-blox TOBY-L2 */
 942         USB_DEVICE_AND_INTERFACE_INFO(UBLOX_VENDOR_ID, 0x1143, USB_CLASS_COMM,
 943                                       USB_CDC_SUBCLASS_ETHERNET,
 944                                       USB_CDC_PROTO_NONE),
 945         .driver_info = (unsigned long)&wwan_info,
 946 }, {
 947         /* U-blox SARA-U2 */
 948         USB_DEVICE_AND_INTERFACE_INFO(UBLOX_VENDOR_ID, 0x1104, USB_CLASS_COMM,
 949                                       USB_CDC_SUBCLASS_ETHERNET,
 950                                       USB_CDC_PROTO_NONE),
 951         .driver_info = (unsigned long)&wwan_info,
 952 }, {
 953         /* Cinterion PLS8 modem by GEMALTO */
 954         USB_DEVICE_AND_INTERFACE_INFO(0x1e2d, 0x0061, USB_CLASS_COMM,
 955                                       USB_CDC_SUBCLASS_ETHERNET,
 956                                       USB_CDC_PROTO_NONE),
 957         .driver_info = (unsigned long)&wwan_info,
 958 }, {
 959         /* Cinterion AHS3 modem by GEMALTO */
 960         USB_DEVICE_AND_INTERFACE_INFO(0x1e2d, 0x0055, USB_CLASS_COMM,
 961                                       USB_CDC_SUBCLASS_ETHERNET,
 962                                       USB_CDC_PROTO_NONE),
 963         .driver_info = (unsigned long)&wwan_info,
 964 }, {
 965         USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ETHERNET,
 966                         USB_CDC_PROTO_NONE),
 967         .driver_info = (unsigned long) &cdc_info,
 968 }, {
 969         USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_MDLM,
 970                         USB_CDC_PROTO_NONE),
 971         .driver_info = (unsigned long)&wwan_info,
 972
 973 }, {
 974         /* Various Huawei modems with a network port like the UMG1831 */
 975         USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_COMM,
 976                                       USB_CDC_SUBCLASS_ETHERNET, 255),
 977         .driver_info = (unsigned long)&wwan_info,
 978 },
 979         { },            /* END */
 980 };
 981 MODULE_DEVICE_TABLE(usb, products);
 982
 983 static struct usb_driver cdc_driver = {
 984         .name =         "cdc_ether",
 985         .id_table =     products,
 986         .probe =        usbnet_probe,
 987         .disconnect =   usbnet_disconnect,
 988         .suspend =      usbnet_suspend,
 989         .resume =       usbnet_resume,
 990         .reset_resume = usbnet_resume,
 991         .supports_autosuspend = 1,
 992         .disable_hub_initiated_lpm = 1,
 993 };
 994
 995 module_usb_driver(cdc_driver);
 996
 997 MODULE_AUTHOR("David Brownell");
 998 MODULE_DESCRIPTION("USB CDC Ethernet devices");
 999 MODULE_LICENSE("GPL");