1 /* 2 * Host Side support for RNDIS Networking Links 3 * Copyright (C) 2005 by David Brownell 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, see <http://www.gnu.org/licenses/>. 17 */ 18 #include <linux/module.h> 19 #include <linux/init.h> 20 #include <linux/netdevice.h> 21 #include <linux/etherdevice.h> 22 #include <linux/ethtool.h> 23 #include <linux/workqueue.h> 24 #include <linux/slab.h> 25 #include <linux/mii.h> 26 #include <linux/usb.h> 27 #include <linux/usb/cdc.h> 28 #include <linux/usb/usbnet.h> 29 #include <linux/usb/rndis_host.h> 30 31 32 /* 33 * RNDIS is NDIS remoted over USB. It's a MSFT variant of CDC ACM ... of 34 * course ACM was intended for modems, not Ethernet links! USB's standard 35 * for Ethernet links is "CDC Ethernet", which is significantly simpler. 36 * 37 * NOTE that Microsoft's "RNDIS 1.0" specification is incomplete. Issues 38 * include: 39 * - Power management in particular relies on information that's scattered 40 * through other documentation, and which is incomplete or incorrect even 41 * there. 42 * - There are various undocumented protocol requirements, such as the 43 * need to send unused garbage in control-OUT messages. 44 * - In some cases, MS-Windows will emit undocumented requests; this 45 * matters more to peripheral implementations than host ones. 46 * 47 * Moreover there's a no-open-specs variant of RNDIS called "ActiveSync". 48 * 49 * For these reasons and others, ** USE OF RNDIS IS STRONGLY DISCOURAGED ** in 50 * favor of such non-proprietary alternatives as CDC Ethernet or the newer (and 51 * currently rare) "Ethernet Emulation Model" (EEM). 52 */ 53 54 /* 55 * RNDIS notifications from device: command completion; "reverse" 56 * keepalives; etc 57 */ 58 void rndis_status(struct usbnet *dev, struct urb *urb) 59 { 60 netdev_dbg(dev->net, "rndis status urb, len %d stat %d\n", 61 urb->actual_length, urb->status); 62 // FIXME for keepalives, respond immediately (asynchronously) 63 // if not an RNDIS status, do like cdc_status(dev,urb) does 64 } 65 EXPORT_SYMBOL_GPL(rndis_status); 66 67 /* 68 * RNDIS indicate messages. 69 */ 70 static void rndis_msg_indicate(struct usbnet *dev, struct rndis_indicate *msg, 71 int buflen) 72 { 73 struct cdc_state *info = (void *)&dev->data; 74 struct device *udev = &info->control->dev; 75 76 if (dev->driver_info->indication) { 77 dev->driver_info->indication(dev, msg, buflen); 78 } else { 79 u32 status = le32_to_cpu(msg->status); 80 81 switch (status) { 82 case RNDIS_STATUS_MEDIA_CONNECT: 83 dev_info(udev, "rndis media connect\n"); 84 break; 85 case RNDIS_STATUS_MEDIA_DISCONNECT: 86 dev_info(udev, "rndis media disconnect\n"); 87 break; 88 default: 89 dev_info(udev, "rndis indication: 0x%08x\n", status); 90 } 91 } 92 } 93 94 /* 95 * RPC done RNDIS-style. Caller guarantees: 96 * - message is properly byteswapped 97 * - there's no other request pending 98 * - buf can hold up to 1KB response (required by RNDIS spec) 99 * On return, the first few entries are already byteswapped. 100 * 101 * Call context is likely probe(), before interface name is known, 102 * which is why we won't try to use it in the diagnostics. 103 */ 104 int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf, int buflen) 105 { 106 struct cdc_state *info = (void *) &dev->data; 107 struct usb_cdc_notification notification; 108 int master_ifnum; 109 int retval; 110 int partial; 111 unsigned count; 112 u32 xid = 0, msg_len, request_id, msg_type, rsp, 113 status; 114 115 /* REVISIT when this gets called from contexts other than probe() or 116 * disconnect(): either serialize, or dispatch responses on xid 117 */ 118 119 msg_type = le32_to_cpu(buf->msg_type); 120 121 /* Issue the request; xid is unique, don't bother byteswapping it */ 122 if (likely(msg_type != RNDIS_MSG_HALT && msg_type != RNDIS_MSG_RESET)) { 123 xid = dev->xid++; 124 if (!xid) 125 xid = dev->xid++; 126 buf->request_id = (__force __le32) xid; 127 } 128 master_ifnum = info->control->cur_altsetting->desc.bInterfaceNumber; 129 retval = usb_control_msg(dev->udev, 130 usb_sndctrlpipe(dev->udev, 0), 131 USB_CDC_SEND_ENCAPSULATED_COMMAND, 132 USB_TYPE_CLASS | USB_RECIP_INTERFACE, 133 0, master_ifnum, 134 buf, le32_to_cpu(buf->msg_len), 135 RNDIS_CONTROL_TIMEOUT_MS); 136 if (unlikely(retval < 0 || xid == 0)) 137 return retval; 138 139 /* Some devices don't respond on the control channel until 140 * polled on the status channel, so do that first. */ 141 if (dev->driver_info->data & RNDIS_DRIVER_DATA_POLL_STATUS) { 142 retval = usb_interrupt_msg( 143 dev->udev, 144 usb_rcvintpipe(dev->udev, 145 dev->status->desc.bEndpointAddress), 146 ¬ification, sizeof(notification), &partial, 147 RNDIS_CONTROL_TIMEOUT_MS); 148 if (unlikely(retval < 0)) 149 return retval; 150 } 151 152 /* Poll the control channel; the request probably completed immediately */ 153 rsp = le32_to_cpu(buf->msg_type) | RNDIS_MSG_COMPLETION; 154 for (count = 0; count < 10; count++) { 155 memset(buf, 0, CONTROL_BUFFER_SIZE); 156 retval = usb_control_msg(dev->udev, 157 usb_rcvctrlpipe(dev->udev, 0), 158 USB_CDC_GET_ENCAPSULATED_RESPONSE, 159 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, 160 0, master_ifnum, 161 buf, buflen, 162 RNDIS_CONTROL_TIMEOUT_MS); 163 if (likely(retval >= 8)) { 164 msg_type = le32_to_cpu(buf->msg_type); 165 msg_len = le32_to_cpu(buf->msg_len); 166 status = le32_to_cpu(buf->status); 167 request_id = (__force u32) buf->request_id; 168 if (likely(msg_type == rsp)) { 169 if (likely(request_id == xid)) { 170 if (unlikely(rsp == RNDIS_MSG_RESET_C)) 171 return 0; 172 if (likely(RNDIS_STATUS_SUCCESS == 173 status)) 174 return 0; 175 dev_dbg(&info->control->dev, 176 "rndis reply status %08x\n", 177 status); 178 return -EL3RST; 179 } 180 dev_dbg(&info->control->dev, 181 "rndis reply id %d expected %d\n", 182 request_id, xid); 183 /* then likely retry */ 184 } else switch (msg_type) { 185 case RNDIS_MSG_INDICATE: /* fault/event */ 186 rndis_msg_indicate(dev, (void *)buf, buflen); 187 break; 188 case RNDIS_MSG_KEEPALIVE: { /* ping */ 189 struct rndis_keepalive_c *msg = (void *)buf; 190 191 msg->msg_type = cpu_to_le32(RNDIS_MSG_KEEPALIVE_C); 192 msg->msg_len = cpu_to_le32(sizeof *msg); 193 msg->status = cpu_to_le32(RNDIS_STATUS_SUCCESS); 194 retval = usb_control_msg(dev->udev, 195 usb_sndctrlpipe(dev->udev, 0), 196 USB_CDC_SEND_ENCAPSULATED_COMMAND, 197 USB_TYPE_CLASS | USB_RECIP_INTERFACE, 198 0, master_ifnum, 199 msg, sizeof *msg, 200 RNDIS_CONTROL_TIMEOUT_MS); 201 if (unlikely(retval < 0)) 202 dev_dbg(&info->control->dev, 203 "rndis keepalive err %d\n", 204 retval); 205 } 206 break; 207 default: 208 dev_dbg(&info->control->dev, 209 "unexpected rndis msg %08x len %d\n", 210 le32_to_cpu(buf->msg_type), msg_len); 211 } 212 } else { 213 /* device probably issued a protocol stall; ignore */ 214 dev_dbg(&info->control->dev, 215 "rndis response error, code %d\n", retval); 216 } 217 msleep(20); 218 } 219 dev_dbg(&info->control->dev, "rndis response timeout\n"); 220 return -ETIMEDOUT; 221 } 222 EXPORT_SYMBOL_GPL(rndis_command); 223 224 /* 225 * rndis_query: 226 * 227 * Performs a query for @oid along with 0 or more bytes of payload as 228 * specified by @in_len. If @reply_len is not set to -1 then the reply 229 * length is checked against this value, resulting in an error if it 230 * doesn't match. 231 * 232 * NOTE: Adding a payload exactly or greater than the size of the expected 233 * response payload is an evident requirement MSFT added for ActiveSync. 234 * 235 * The only exception is for OIDs that return a variably sized response, 236 * in which case no payload should be added. This undocumented (and 237 * nonsensical!) issue was found by sniffing protocol requests from the 238 * ActiveSync 4.1 Windows driver. 239 */ 240 static int rndis_query(struct usbnet *dev, struct usb_interface *intf, 241 void *buf, u32 oid, u32 in_len, 242 void **reply, int *reply_len) 243 { 244 int retval; 245 union { 246 void *buf; 247 struct rndis_msg_hdr *header; 248 struct rndis_query *get; 249 struct rndis_query_c *get_c; 250 } u; 251 u32 off, len; 252 253 u.buf = buf; 254 255 memset(u.get, 0, sizeof *u.get + in_len); 256 u.get->msg_type = cpu_to_le32(RNDIS_MSG_QUERY); 257 u.get->msg_len = cpu_to_le32(sizeof *u.get + in_len); 258 u.get->oid = cpu_to_le32(oid); 259 u.get->len = cpu_to_le32(in_len); 260 u.get->offset = cpu_to_le32(20); 261 262 retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE); 263 if (unlikely(retval < 0)) { 264 dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) failed, %d\n", 265 oid, retval); 266 return retval; 267 } 268 269 off = le32_to_cpu(u.get_c->offset); 270 len = le32_to_cpu(u.get_c->len); 271 if (unlikely((8 + off + len) > CONTROL_BUFFER_SIZE)) 272 goto response_error; 273 274 if (*reply_len != -1 && len != *reply_len) 275 goto response_error; 276 277 *reply = (unsigned char *) &u.get_c->request_id + off; 278 *reply_len = len; 279 280 return retval; 281 282 response_error: 283 dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) " 284 "invalid response - off %d len %d\n", 285 oid, off, len); 286 return -EDOM; 287 } 288 289 /* same as usbnet_netdev_ops but MTU change not allowed */ 290 static const struct net_device_ops rndis_netdev_ops = { 291 .ndo_open = usbnet_open, 292 .ndo_stop = usbnet_stop, 293 .ndo_start_xmit = usbnet_start_xmit, 294 .ndo_tx_timeout = usbnet_tx_timeout, 295 .ndo_set_mac_address = eth_mac_addr, 296 .ndo_validate_addr = eth_validate_addr, 297 }; 298 299 int 300 generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags) 301 { 302 int retval; 303 struct net_device *net = dev->net; 304 struct cdc_state *info = (void *) &dev->data; 305 union { 306 void *buf; 307 struct rndis_msg_hdr *header; 308 struct rndis_init *init; 309 struct rndis_init_c *init_c; 310 struct rndis_query *get; 311 struct rndis_query_c *get_c; 312 struct rndis_set *set; 313 struct rndis_set_c *set_c; 314 struct rndis_halt *halt; 315 } u; 316 u32 tmp; 317 __le32 phym_unspec, *phym; 318 int reply_len; 319 unsigned char *bp; 320 321 /* we can't rely on i/o from stack working, or stack allocation */ 322 u.buf = kmalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL); 323 if (!u.buf) 324 return -ENOMEM; 325 retval = usbnet_generic_cdc_bind(dev, intf); 326 if (retval < 0) 327 goto fail; 328 329 u.init->msg_type = cpu_to_le32(RNDIS_MSG_INIT); 330 u.init->msg_len = cpu_to_le32(sizeof *u.init); 331 u.init->major_version = cpu_to_le32(1); 332 u.init->minor_version = cpu_to_le32(0); 333 334 /* max transfer (in spec) is 0x4000 at full speed, but for 335 * TX we'll stick to one Ethernet packet plus RNDIS framing. 336 * For RX we handle drivers that zero-pad to end-of-packet. 337 * Don't let userspace change these settings. 338 * 339 * NOTE: there still seems to be wierdness here, as if we need 340 * to do some more things to make sure WinCE targets accept this. 341 * They default to jumbograms of 8KB or 16KB, which is absurd 342 * for such low data rates and which is also more than Linux 343 * can usually expect to allocate for SKB data... 344 */ 345 net->hard_header_len += sizeof (struct rndis_data_hdr); 346 dev->hard_mtu = net->mtu + net->hard_header_len; 347 348 dev->maxpacket = usb_maxpacket(dev->udev, dev->out, 1); 349 if (dev->maxpacket == 0) { 350 netif_dbg(dev, probe, dev->net, 351 "dev->maxpacket can't be 0\n"); 352 retval = -EINVAL; 353 goto fail_and_release; 354 } 355 356 dev->rx_urb_size = dev->hard_mtu + (dev->maxpacket + 1); 357 dev->rx_urb_size &= ~(dev->maxpacket - 1); 358 u.init->max_transfer_size = cpu_to_le32(dev->rx_urb_size); 359 360 net->netdev_ops = &rndis_netdev_ops; 361 362 retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE); 363 if (unlikely(retval < 0)) { 364 /* it might not even be an RNDIS device!! */ 365 dev_err(&intf->dev, "RNDIS init failed, %d\n", retval); 366 goto fail_and_release; 367 } 368 tmp = le32_to_cpu(u.init_c->max_transfer_size); 369 if (tmp < dev->hard_mtu) { 370 if (tmp <= net->hard_header_len) { 371 dev_err(&intf->dev, 372 "dev can't take %u byte packets (max %u)\n", 373 dev->hard_mtu, tmp); 374 retval = -EINVAL; 375 goto halt_fail_and_release; 376 } 377 dev_warn(&intf->dev, 378 "dev can't take %u byte packets (max %u), " 379 "adjusting MTU to %u\n", 380 dev->hard_mtu, tmp, tmp - net->hard_header_len); 381 dev->hard_mtu = tmp; 382 net->mtu = dev->hard_mtu - net->hard_header_len; 383 } 384 385 /* REVISIT: peripheral "alignment" request is ignored ... */ 386 dev_dbg(&intf->dev, 387 "hard mtu %u (%u from dev), rx buflen %Zu, align %d\n", 388 dev->hard_mtu, tmp, dev->rx_urb_size, 389 1 << le32_to_cpu(u.init_c->packet_alignment)); 390 391 /* module has some device initialization code needs to be done right 392 * after RNDIS_INIT */ 393 if (dev->driver_info->early_init && 394 dev->driver_info->early_init(dev) != 0) 395 goto halt_fail_and_release; 396 397 /* Check physical medium */ 398 phym = NULL; 399 reply_len = sizeof *phym; 400 retval = rndis_query(dev, intf, u.buf, 401 RNDIS_OID_GEN_PHYSICAL_MEDIUM, 402 0, (void **) &phym, &reply_len); 403 if (retval != 0 || !phym) { 404 /* OID is optional so don't fail here. */ 405 phym_unspec = cpu_to_le32(RNDIS_PHYSICAL_MEDIUM_UNSPECIFIED); 406 phym = &phym_unspec; 407 } 408 if ((flags & FLAG_RNDIS_PHYM_WIRELESS) && 409 le32_to_cpup(phym) != RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) { 410 netif_dbg(dev, probe, dev->net, 411 "driver requires wireless physical medium, but device is not\n"); 412 retval = -ENODEV; 413 goto halt_fail_and_release; 414 } 415 if ((flags & FLAG_RNDIS_PHYM_NOT_WIRELESS) && 416 le32_to_cpup(phym) == RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) { 417 netif_dbg(dev, probe, dev->net, 418 "driver requires non-wireless physical medium, but device is wireless.\n"); 419 retval = -ENODEV; 420 goto halt_fail_and_release; 421 } 422 423 /* Get designated host ethernet address */ 424 reply_len = ETH_ALEN; 425 retval = rndis_query(dev, intf, u.buf, 426 RNDIS_OID_802_3_PERMANENT_ADDRESS, 427 48, (void **) &bp, &reply_len); 428 if (unlikely(retval< 0)) { 429 dev_err(&intf->dev, "rndis get ethaddr, %d\n", retval); 430 goto halt_fail_and_release; 431 } 432 memcpy(net->dev_addr, bp, ETH_ALEN); 433 434 /* set a nonzero filter to enable data transfers */ 435 memset(u.set, 0, sizeof *u.set); 436 u.set->msg_type = cpu_to_le32(RNDIS_MSG_SET); 437 u.set->msg_len = cpu_to_le32(4 + sizeof *u.set); 438 u.set->oid = cpu_to_le32(RNDIS_OID_GEN_CURRENT_PACKET_FILTER); 439 u.set->len = cpu_to_le32(4); 440 u.set->offset = cpu_to_le32((sizeof *u.set) - 8); 441 *(__le32 *)(u.buf + sizeof *u.set) = cpu_to_le32(RNDIS_DEFAULT_FILTER); 442 443 retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE); 444 if (unlikely(retval < 0)) { 445 dev_err(&intf->dev, "rndis set packet filter, %d\n", retval); 446 goto halt_fail_and_release; 447 } 448 449 retval = 0; 450 451 kfree(u.buf); 452 return retval; 453 454 halt_fail_and_release: 455 memset(u.halt, 0, sizeof *u.halt); 456 u.halt->msg_type = cpu_to_le32(RNDIS_MSG_HALT); 457 u.halt->msg_len = cpu_to_le32(sizeof *u.halt); 458 (void) rndis_command(dev, (void *)u.halt, CONTROL_BUFFER_SIZE); 459 fail_and_release: 460 usb_set_intfdata(info->data, NULL); 461 usb_driver_release_interface(driver_of(intf), info->data); 462 info->data = NULL; 463 fail: 464 kfree(u.buf); 465 return retval; 466 } 467 EXPORT_SYMBOL_GPL(generic_rndis_bind); 468 469 static int rndis_bind(struct usbnet *dev, struct usb_interface *intf) 470 { 471 return generic_rndis_bind(dev, intf, FLAG_RNDIS_PHYM_NOT_WIRELESS); 472 } 473 474 void rndis_unbind(struct usbnet *dev, struct usb_interface *intf) 475 { 476 struct rndis_halt *halt; 477 478 /* try to clear any rndis state/activity (no i/o from stack!) */ 479 halt = kzalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL); 480 if (halt) { 481 halt->msg_type = cpu_to_le32(RNDIS_MSG_HALT); 482 halt->msg_len = cpu_to_le32(sizeof *halt); 483 (void) rndis_command(dev, (void *)halt, CONTROL_BUFFER_SIZE); 484 kfree(halt); 485 } 486 487 usbnet_cdc_unbind(dev, intf); 488 } 489 EXPORT_SYMBOL_GPL(rndis_unbind); 490 491 /* 492 * DATA -- host must not write zlps 493 */ 494 int rndis_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 495 { 496 /* peripheral may have batched packets to us... */ 497 while (likely(skb->len)) { 498 struct rndis_data_hdr *hdr = (void *)skb->data; 499 struct sk_buff *skb2; 500 u32 msg_type, msg_len, data_offset, data_len; 501 502 msg_type = le32_to_cpu(hdr->msg_type); 503 msg_len = le32_to_cpu(hdr->msg_len); 504 data_offset = le32_to_cpu(hdr->data_offset); 505 data_len = le32_to_cpu(hdr->data_len); 506 507 /* don't choke if we see oob, per-packet data, etc */ 508 if (unlikely(msg_type != RNDIS_MSG_PACKET || skb->len < msg_len 509 || (data_offset + data_len + 8) > msg_len)) { 510 dev->net->stats.rx_frame_errors++; 511 netdev_dbg(dev->net, "bad rndis message %d/%d/%d/%d, len %d\n", 512 le32_to_cpu(hdr->msg_type), 513 msg_len, data_offset, data_len, skb->len); 514 return 0; 515 } 516 skb_pull(skb, 8 + data_offset); 517 518 /* at most one packet left? */ 519 if (likely((data_len - skb->len) <= sizeof *hdr)) { 520 skb_trim(skb, data_len); 521 break; 522 } 523 524 /* try to return all the packets in the batch */ 525 skb2 = skb_clone(skb, GFP_ATOMIC); 526 if (unlikely(!skb2)) 527 break; 528 skb_pull(skb, msg_len - sizeof *hdr); 529 skb_trim(skb2, data_len); 530 usbnet_skb_return(dev, skb2); 531 } 532 533 /* caller will usbnet_skb_return the remaining packet */ 534 return 1; 535 } 536 EXPORT_SYMBOL_GPL(rndis_rx_fixup); 537 538 struct sk_buff * 539 rndis_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 540 { 541 struct rndis_data_hdr *hdr; 542 struct sk_buff *skb2; 543 unsigned len = skb->len; 544 545 if (likely(!skb_cloned(skb))) { 546 int room = skb_headroom(skb); 547 548 /* enough head room as-is? */ 549 if (unlikely((sizeof *hdr) <= room)) 550 goto fill; 551 552 /* enough room, but needs to be readjusted? */ 553 room += skb_tailroom(skb); 554 if (likely((sizeof *hdr) <= room)) { 555 skb->data = memmove(skb->head + sizeof *hdr, 556 skb->data, len); 557 skb_set_tail_pointer(skb, len); 558 goto fill; 559 } 560 } 561 562 /* create a new skb, with the correct size (and tailpad) */ 563 skb2 = skb_copy_expand(skb, sizeof *hdr, 1, flags); 564 dev_kfree_skb_any(skb); 565 if (unlikely(!skb2)) 566 return skb2; 567 skb = skb2; 568 569 /* fill out the RNDIS header. we won't bother trying to batch 570 * packets; Linux minimizes wasted bandwidth through tx queues. 571 */ 572 fill: 573 hdr = (void *) __skb_push(skb, sizeof *hdr); 574 memset(hdr, 0, sizeof *hdr); 575 hdr->msg_type = cpu_to_le32(RNDIS_MSG_PACKET); 576 hdr->msg_len = cpu_to_le32(skb->len); 577 hdr->data_offset = cpu_to_le32(sizeof(*hdr) - 8); 578 hdr->data_len = cpu_to_le32(len); 579 580 /* FIXME make the last packet always be short ... */ 581 return skb; 582 } 583 EXPORT_SYMBOL_GPL(rndis_tx_fixup); 584 585 586 static const struct driver_info rndis_info = { 587 .description = "RNDIS device", 588 .flags = FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT, 589 .bind = rndis_bind, 590 .unbind = rndis_unbind, 591 .status = rndis_status, 592 .rx_fixup = rndis_rx_fixup, 593 .tx_fixup = rndis_tx_fixup, 594 }; 595 596 static const struct driver_info rndis_poll_status_info = { 597 .description = "RNDIS device (poll status before control)", 598 .flags = FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT, 599 .data = RNDIS_DRIVER_DATA_POLL_STATUS, 600 .bind = rndis_bind, 601 .unbind = rndis_unbind, 602 .status = rndis_status, 603 .rx_fixup = rndis_rx_fixup, 604 .tx_fixup = rndis_tx_fixup, 605 }; 606 607 /*-------------------------------------------------------------------------*/ 608 609 static const struct usb_device_id products [] = { 610 { 611 /* 2Wire HomePortal 1000SW */ 612 USB_DEVICE_AND_INTERFACE_INFO(0x1630, 0x0042, 613 USB_CLASS_COMM, 2 /* ACM */, 0x0ff), 614 .driver_info = (unsigned long) &rndis_poll_status_info, 615 }, { 616 /* RNDIS is MSFT's un-official variant of CDC ACM */ 617 USB_INTERFACE_INFO(USB_CLASS_COMM, 2 /* ACM */, 0x0ff), 618 .driver_info = (unsigned long) &rndis_info, 619 }, { 620 /* "ActiveSync" is an undocumented variant of RNDIS, used in WM5 */ 621 USB_INTERFACE_INFO(USB_CLASS_MISC, 1, 1), 622 .driver_info = (unsigned long) &rndis_poll_status_info, 623 }, { 624 /* RNDIS for tethering */ 625 USB_INTERFACE_INFO(USB_CLASS_WIRELESS_CONTROLLER, 1, 3), 626 .driver_info = (unsigned long) &rndis_info, 627 }, 628 { }, // END 629 }; 630 MODULE_DEVICE_TABLE(usb, products); 631 632 static struct usb_driver rndis_driver = { 633 .name = "rndis_host", 634 .id_table = products, 635 .probe = usbnet_probe, 636 .disconnect = usbnet_disconnect, 637 .suspend = usbnet_suspend, 638 .resume = usbnet_resume, 639 .disable_hub_initiated_lpm = 1, 640 }; 641 642 module_usb_driver(rndis_driver); 643 644 MODULE_AUTHOR("David Brownell"); 645 MODULE_DESCRIPTION("USB Host side RNDIS driver"); 646 MODULE_LICENSE("GPL"); 647