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, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 */ 19 #include <linux/module.h> 20 #include <linux/init.h> 21 #include <linux/netdevice.h> 22 #include <linux/etherdevice.h> 23 #include <linux/ethtool.h> 24 #include <linux/workqueue.h> 25 #include <linux/slab.h> 26 #include <linux/mii.h> 27 #include <linux/usb.h> 28 #include <linux/usb/cdc.h> 29 #include <linux/usb/usbnet.h> 30 #include <linux/usb/rndis_host.h> 31 32 33 /* 34 * RNDIS is NDIS remoted over USB. It's a MSFT variant of CDC ACM ... of 35 * course ACM was intended for modems, not Ethernet links! USB's standard 36 * for Ethernet links is "CDC Ethernet", which is significantly simpler. 37 * 38 * NOTE that Microsoft's "RNDIS 1.0" specification is incomplete. Issues 39 * include: 40 * - Power management in particular relies on information that's scattered 41 * through other documentation, and which is incomplete or incorrect even 42 * there. 43 * - There are various undocumented protocol requirements, such as the 44 * need to send unused garbage in control-OUT messages. 45 * - In some cases, MS-Windows will emit undocumented requests; this 46 * matters more to peripheral implementations than host ones. 47 * 48 * Moreover there's a no-open-specs variant of RNDIS called "ActiveSync". 49 * 50 * For these reasons and others, ** USE OF RNDIS IS STRONGLY DISCOURAGED ** in 51 * favor of such non-proprietary alternatives as CDC Ethernet or the newer (and 52 * currently rare) "Ethernet Emulation Model" (EEM). 53 */ 54 55 /* 56 * RNDIS notifications from device: command completion; "reverse" 57 * keepalives; etc 58 */ 59 void rndis_status(struct usbnet *dev, struct urb *urb) 60 { 61 netdev_dbg(dev->net, "rndis status urb, len %d stat %d\n", 62 urb->actual_length, urb->status); 63 // FIXME for keepalives, respond immediately (asynchronously) 64 // if not an RNDIS status, do like cdc_status(dev,urb) does 65 } 66 EXPORT_SYMBOL_GPL(rndis_status); 67 68 /* 69 * RNDIS indicate messages. 70 */ 71 static void rndis_msg_indicate(struct usbnet *dev, struct rndis_indicate *msg, 72 int buflen) 73 { 74 struct cdc_state *info = (void *)&dev->data; 75 struct device *udev = &info->control->dev; 76 77 if (dev->driver_info->indication) { 78 dev->driver_info->indication(dev, msg, buflen); 79 } else { 80 switch (msg->status) { 81 case RNDIS_STATUS_MEDIA_CONNECT: 82 dev_info(udev, "rndis media connect\n"); 83 break; 84 case RNDIS_STATUS_MEDIA_DISCONNECT: 85 dev_info(udev, "rndis media disconnect\n"); 86 break; 87 default: 88 dev_info(udev, "rndis indication: 0x%08x\n", 89 le32_to_cpu(msg->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 int master_ifnum; 108 int retval; 109 unsigned count; 110 __le32 rsp; 111 u32 xid = 0, msg_len, request_id; 112 113 /* REVISIT when this gets called from contexts other than probe() or 114 * disconnect(): either serialize, or dispatch responses on xid 115 */ 116 117 /* Issue the request; xid is unique, don't bother byteswapping it */ 118 if (likely(buf->msg_type != RNDIS_MSG_HALT && 119 buf->msg_type != RNDIS_MSG_RESET)) { 120 xid = dev->xid++; 121 if (!xid) 122 xid = dev->xid++; 123 buf->request_id = (__force __le32) xid; 124 } 125 master_ifnum = info->control->cur_altsetting->desc.bInterfaceNumber; 126 retval = usb_control_msg(dev->udev, 127 usb_sndctrlpipe(dev->udev, 0), 128 USB_CDC_SEND_ENCAPSULATED_COMMAND, 129 USB_TYPE_CLASS | USB_RECIP_INTERFACE, 130 0, master_ifnum, 131 buf, le32_to_cpu(buf->msg_len), 132 RNDIS_CONTROL_TIMEOUT_MS); 133 if (unlikely(retval < 0 || xid == 0)) 134 return retval; 135 136 // FIXME Seems like some devices discard responses when 137 // we time out and cancel our "get response" requests... 138 // so, this is fragile. Probably need to poll for status. 139 140 /* ignore status endpoint, just poll the control channel; 141 * the request probably completed immediately 142 */ 143 rsp = buf->msg_type | RNDIS_MSG_COMPLETION; 144 for (count = 0; count < 10; count++) { 145 memset(buf, 0, CONTROL_BUFFER_SIZE); 146 retval = usb_control_msg(dev->udev, 147 usb_rcvctrlpipe(dev->udev, 0), 148 USB_CDC_GET_ENCAPSULATED_RESPONSE, 149 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, 150 0, master_ifnum, 151 buf, buflen, 152 RNDIS_CONTROL_TIMEOUT_MS); 153 if (likely(retval >= 8)) { 154 msg_len = le32_to_cpu(buf->msg_len); 155 request_id = (__force u32) buf->request_id; 156 if (likely(buf->msg_type == rsp)) { 157 if (likely(request_id == xid)) { 158 if (unlikely(rsp == RNDIS_MSG_RESET_C)) 159 return 0; 160 if (likely(RNDIS_STATUS_SUCCESS 161 == buf->status)) 162 return 0; 163 dev_dbg(&info->control->dev, 164 "rndis reply status %08x\n", 165 le32_to_cpu(buf->status)); 166 return -EL3RST; 167 } 168 dev_dbg(&info->control->dev, 169 "rndis reply id %d expected %d\n", 170 request_id, xid); 171 /* then likely retry */ 172 } else switch (buf->msg_type) { 173 case RNDIS_MSG_INDICATE: /* fault/event */ 174 rndis_msg_indicate(dev, (void *)buf, buflen); 175 176 break; 177 case RNDIS_MSG_KEEPALIVE: { /* ping */ 178 struct rndis_keepalive_c *msg = (void *)buf; 179 180 msg->msg_type = RNDIS_MSG_KEEPALIVE_C; 181 msg->msg_len = cpu_to_le32(sizeof *msg); 182 msg->status = RNDIS_STATUS_SUCCESS; 183 retval = usb_control_msg(dev->udev, 184 usb_sndctrlpipe(dev->udev, 0), 185 USB_CDC_SEND_ENCAPSULATED_COMMAND, 186 USB_TYPE_CLASS | USB_RECIP_INTERFACE, 187 0, master_ifnum, 188 msg, sizeof *msg, 189 RNDIS_CONTROL_TIMEOUT_MS); 190 if (unlikely(retval < 0)) 191 dev_dbg(&info->control->dev, 192 "rndis keepalive err %d\n", 193 retval); 194 } 195 break; 196 default: 197 dev_dbg(&info->control->dev, 198 "unexpected rndis msg %08x len %d\n", 199 le32_to_cpu(buf->msg_type), msg_len); 200 } 201 } else { 202 /* device probably issued a protocol stall; ignore */ 203 dev_dbg(&info->control->dev, 204 "rndis response error, code %d\n", retval); 205 } 206 msleep(20); 207 } 208 dev_dbg(&info->control->dev, "rndis response timeout\n"); 209 return -ETIMEDOUT; 210 } 211 EXPORT_SYMBOL_GPL(rndis_command); 212 213 /* 214 * rndis_query: 215 * 216 * Performs a query for @oid along with 0 or more bytes of payload as 217 * specified by @in_len. If @reply_len is not set to -1 then the reply 218 * length is checked against this value, resulting in an error if it 219 * doesn't match. 220 * 221 * NOTE: Adding a payload exactly or greater than the size of the expected 222 * response payload is an evident requirement MSFT added for ActiveSync. 223 * 224 * The only exception is for OIDs that return a variably sized response, 225 * in which case no payload should be added. This undocumented (and 226 * nonsensical!) issue was found by sniffing protocol requests from the 227 * ActiveSync 4.1 Windows driver. 228 */ 229 static int rndis_query(struct usbnet *dev, struct usb_interface *intf, 230 void *buf, __le32 oid, u32 in_len, 231 void **reply, int *reply_len) 232 { 233 int retval; 234 union { 235 void *buf; 236 struct rndis_msg_hdr *header; 237 struct rndis_query *get; 238 struct rndis_query_c *get_c; 239 } u; 240 u32 off, len; 241 242 u.buf = buf; 243 244 memset(u.get, 0, sizeof *u.get + in_len); 245 u.get->msg_type = RNDIS_MSG_QUERY; 246 u.get->msg_len = cpu_to_le32(sizeof *u.get + in_len); 247 u.get->oid = oid; 248 u.get->len = cpu_to_le32(in_len); 249 u.get->offset = cpu_to_le32(20); 250 251 retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE); 252 if (unlikely(retval < 0)) { 253 dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) failed, %d\n", 254 oid, retval); 255 return retval; 256 } 257 258 off = le32_to_cpu(u.get_c->offset); 259 len = le32_to_cpu(u.get_c->len); 260 if (unlikely((8 + off + len) > CONTROL_BUFFER_SIZE)) 261 goto response_error; 262 263 if (*reply_len != -1 && len != *reply_len) 264 goto response_error; 265 266 *reply = (unsigned char *) &u.get_c->request_id + off; 267 *reply_len = len; 268 269 return retval; 270 271 response_error: 272 dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) " 273 "invalid response - off %d len %d\n", 274 oid, off, len); 275 return -EDOM; 276 } 277 278 /* same as usbnet_netdev_ops but MTU change not allowed */ 279 static const struct net_device_ops rndis_netdev_ops = { 280 .ndo_open = usbnet_open, 281 .ndo_stop = usbnet_stop, 282 .ndo_start_xmit = usbnet_start_xmit, 283 .ndo_tx_timeout = usbnet_tx_timeout, 284 .ndo_set_mac_address = eth_mac_addr, 285 .ndo_validate_addr = eth_validate_addr, 286 }; 287 288 int 289 generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags) 290 { 291 int retval; 292 struct net_device *net = dev->net; 293 struct cdc_state *info = (void *) &dev->data; 294 union { 295 void *buf; 296 struct rndis_msg_hdr *header; 297 struct rndis_init *init; 298 struct rndis_init_c *init_c; 299 struct rndis_query *get; 300 struct rndis_query_c *get_c; 301 struct rndis_set *set; 302 struct rndis_set_c *set_c; 303 struct rndis_halt *halt; 304 } u; 305 u32 tmp; 306 __le32 phym_unspec, *phym; 307 int reply_len; 308 unsigned char *bp; 309 310 /* we can't rely on i/o from stack working, or stack allocation */ 311 u.buf = kmalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL); 312 if (!u.buf) 313 return -ENOMEM; 314 retval = usbnet_generic_cdc_bind(dev, intf); 315 if (retval < 0) 316 goto fail; 317 318 u.init->msg_type = RNDIS_MSG_INIT; 319 u.init->msg_len = cpu_to_le32(sizeof *u.init); 320 u.init->major_version = cpu_to_le32(1); 321 u.init->minor_version = cpu_to_le32(0); 322 323 /* max transfer (in spec) is 0x4000 at full speed, but for 324 * TX we'll stick to one Ethernet packet plus RNDIS framing. 325 * For RX we handle drivers that zero-pad to end-of-packet. 326 * Don't let userspace change these settings. 327 * 328 * NOTE: there still seems to be wierdness here, as if we need 329 * to do some more things to make sure WinCE targets accept this. 330 * They default to jumbograms of 8KB or 16KB, which is absurd 331 * for such low data rates and which is also more than Linux 332 * can usually expect to allocate for SKB data... 333 */ 334 net->hard_header_len += sizeof (struct rndis_data_hdr); 335 dev->hard_mtu = net->mtu + net->hard_header_len; 336 337 dev->maxpacket = usb_maxpacket(dev->udev, dev->out, 1); 338 if (dev->maxpacket == 0) { 339 netif_dbg(dev, probe, dev->net, 340 "dev->maxpacket can't be 0\n"); 341 retval = -EINVAL; 342 goto fail_and_release; 343 } 344 345 dev->rx_urb_size = dev->hard_mtu + (dev->maxpacket + 1); 346 dev->rx_urb_size &= ~(dev->maxpacket - 1); 347 u.init->max_transfer_size = cpu_to_le32(dev->rx_urb_size); 348 349 net->netdev_ops = &rndis_netdev_ops; 350 351 retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE); 352 if (unlikely(retval < 0)) { 353 /* it might not even be an RNDIS device!! */ 354 dev_err(&intf->dev, "RNDIS init failed, %d\n", retval); 355 goto fail_and_release; 356 } 357 tmp = le32_to_cpu(u.init_c->max_transfer_size); 358 if (tmp < dev->hard_mtu) { 359 if (tmp <= net->hard_header_len) { 360 dev_err(&intf->dev, 361 "dev can't take %u byte packets (max %u)\n", 362 dev->hard_mtu, tmp); 363 retval = -EINVAL; 364 goto halt_fail_and_release; 365 } 366 dev_warn(&intf->dev, 367 "dev can't take %u byte packets (max %u), " 368 "adjusting MTU to %u\n", 369 dev->hard_mtu, tmp, tmp - net->hard_header_len); 370 dev->hard_mtu = tmp; 371 net->mtu = dev->hard_mtu - net->hard_header_len; 372 } 373 374 /* REVISIT: peripheral "alignment" request is ignored ... */ 375 dev_dbg(&intf->dev, 376 "hard mtu %u (%u from dev), rx buflen %Zu, align %d\n", 377 dev->hard_mtu, tmp, dev->rx_urb_size, 378 1 << le32_to_cpu(u.init_c->packet_alignment)); 379 380 /* module has some device initialization code needs to be done right 381 * after RNDIS_INIT */ 382 if (dev->driver_info->early_init && 383 dev->driver_info->early_init(dev) != 0) 384 goto halt_fail_and_release; 385 386 /* Check physical medium */ 387 phym = NULL; 388 reply_len = sizeof *phym; 389 retval = rndis_query(dev, intf, u.buf, OID_GEN_PHYSICAL_MEDIUM, 390 0, (void **) &phym, &reply_len); 391 if (retval != 0 || !phym) { 392 /* OID is optional so don't fail here. */ 393 phym_unspec = RNDIS_PHYSICAL_MEDIUM_UNSPECIFIED; 394 phym = &phym_unspec; 395 } 396 if ((flags & FLAG_RNDIS_PHYM_WIRELESS) && 397 *phym != RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) { 398 netif_dbg(dev, probe, dev->net, 399 "driver requires wireless physical medium, but device is not\n"); 400 retval = -ENODEV; 401 goto halt_fail_and_release; 402 } 403 if ((flags & FLAG_RNDIS_PHYM_NOT_WIRELESS) && 404 *phym == RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) { 405 netif_dbg(dev, probe, dev->net, 406 "driver requires non-wireless physical medium, but device is wireless.\n"); 407 retval = -ENODEV; 408 goto halt_fail_and_release; 409 } 410 411 /* Get designated host ethernet address */ 412 reply_len = ETH_ALEN; 413 retval = rndis_query(dev, intf, u.buf, OID_802_3_PERMANENT_ADDRESS, 414 48, (void **) &bp, &reply_len); 415 if (unlikely(retval< 0)) { 416 dev_err(&intf->dev, "rndis get ethaddr, %d\n", retval); 417 goto halt_fail_and_release; 418 } 419 memcpy(net->dev_addr, bp, ETH_ALEN); 420 memcpy(net->perm_addr, bp, ETH_ALEN); 421 422 /* set a nonzero filter to enable data transfers */ 423 memset(u.set, 0, sizeof *u.set); 424 u.set->msg_type = RNDIS_MSG_SET; 425 u.set->msg_len = cpu_to_le32(4 + sizeof *u.set); 426 u.set->oid = OID_GEN_CURRENT_PACKET_FILTER; 427 u.set->len = cpu_to_le32(4); 428 u.set->offset = cpu_to_le32((sizeof *u.set) - 8); 429 *(__le32 *)(u.buf + sizeof *u.set) = RNDIS_DEFAULT_FILTER; 430 431 retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE); 432 if (unlikely(retval < 0)) { 433 dev_err(&intf->dev, "rndis set packet filter, %d\n", retval); 434 goto halt_fail_and_release; 435 } 436 437 retval = 0; 438 439 kfree(u.buf); 440 return retval; 441 442 halt_fail_and_release: 443 memset(u.halt, 0, sizeof *u.halt); 444 u.halt->msg_type = RNDIS_MSG_HALT; 445 u.halt->msg_len = cpu_to_le32(sizeof *u.halt); 446 (void) rndis_command(dev, (void *)u.halt, CONTROL_BUFFER_SIZE); 447 fail_and_release: 448 usb_set_intfdata(info->data, NULL); 449 usb_driver_release_interface(driver_of(intf), info->data); 450 info->data = NULL; 451 fail: 452 kfree(u.buf); 453 return retval; 454 } 455 EXPORT_SYMBOL_GPL(generic_rndis_bind); 456 457 static int rndis_bind(struct usbnet *dev, struct usb_interface *intf) 458 { 459 return generic_rndis_bind(dev, intf, FLAG_RNDIS_PHYM_NOT_WIRELESS); 460 } 461 462 void rndis_unbind(struct usbnet *dev, struct usb_interface *intf) 463 { 464 struct rndis_halt *halt; 465 466 /* try to clear any rndis state/activity (no i/o from stack!) */ 467 halt = kzalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL); 468 if (halt) { 469 halt->msg_type = RNDIS_MSG_HALT; 470 halt->msg_len = cpu_to_le32(sizeof *halt); 471 (void) rndis_command(dev, (void *)halt, CONTROL_BUFFER_SIZE); 472 kfree(halt); 473 } 474 475 usbnet_cdc_unbind(dev, intf); 476 } 477 EXPORT_SYMBOL_GPL(rndis_unbind); 478 479 /* 480 * DATA -- host must not write zlps 481 */ 482 int rndis_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 483 { 484 /* peripheral may have batched packets to us... */ 485 while (likely(skb->len)) { 486 struct rndis_data_hdr *hdr = (void *)skb->data; 487 struct sk_buff *skb2; 488 u32 msg_len, data_offset, data_len; 489 490 msg_len = le32_to_cpu(hdr->msg_len); 491 data_offset = le32_to_cpu(hdr->data_offset); 492 data_len = le32_to_cpu(hdr->data_len); 493 494 /* don't choke if we see oob, per-packet data, etc */ 495 if (unlikely(hdr->msg_type != RNDIS_MSG_PACKET || 496 skb->len < msg_len || 497 (data_offset + data_len + 8) > msg_len)) { 498 dev->net->stats.rx_frame_errors++; 499 netdev_dbg(dev->net, "bad rndis message %d/%d/%d/%d, len %d\n", 500 le32_to_cpu(hdr->msg_type), 501 msg_len, data_offset, data_len, skb->len); 502 return 0; 503 } 504 skb_pull(skb, 8 + data_offset); 505 506 /* at most one packet left? */ 507 if (likely((data_len - skb->len) <= sizeof *hdr)) { 508 skb_trim(skb, data_len); 509 break; 510 } 511 512 /* try to return all the packets in the batch */ 513 skb2 = skb_clone(skb, GFP_ATOMIC); 514 if (unlikely(!skb2)) 515 break; 516 skb_pull(skb, msg_len - sizeof *hdr); 517 skb_trim(skb2, data_len); 518 usbnet_skb_return(dev, skb2); 519 } 520 521 /* caller will usbnet_skb_return the remaining packet */ 522 return 1; 523 } 524 EXPORT_SYMBOL_GPL(rndis_rx_fixup); 525 526 struct sk_buff * 527 rndis_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 528 { 529 struct rndis_data_hdr *hdr; 530 struct sk_buff *skb2; 531 unsigned len = skb->len; 532 533 if (likely(!skb_cloned(skb))) { 534 int room = skb_headroom(skb); 535 536 /* enough head room as-is? */ 537 if (unlikely((sizeof *hdr) <= room)) 538 goto fill; 539 540 /* enough room, but needs to be readjusted? */ 541 room += skb_tailroom(skb); 542 if (likely((sizeof *hdr) <= room)) { 543 skb->data = memmove(skb->head + sizeof *hdr, 544 skb->data, len); 545 skb_set_tail_pointer(skb, len); 546 goto fill; 547 } 548 } 549 550 /* create a new skb, with the correct size (and tailpad) */ 551 skb2 = skb_copy_expand(skb, sizeof *hdr, 1, flags); 552 dev_kfree_skb_any(skb); 553 if (unlikely(!skb2)) 554 return skb2; 555 skb = skb2; 556 557 /* fill out the RNDIS header. we won't bother trying to batch 558 * packets; Linux minimizes wasted bandwidth through tx queues. 559 */ 560 fill: 561 hdr = (void *) __skb_push(skb, sizeof *hdr); 562 memset(hdr, 0, sizeof *hdr); 563 hdr->msg_type = RNDIS_MSG_PACKET; 564 hdr->msg_len = cpu_to_le32(skb->len); 565 hdr->data_offset = cpu_to_le32(sizeof(*hdr) - 8); 566 hdr->data_len = cpu_to_le32(len); 567 568 /* FIXME make the last packet always be short ... */ 569 return skb; 570 } 571 EXPORT_SYMBOL_GPL(rndis_tx_fixup); 572 573 574 static const struct driver_info rndis_info = { 575 .description = "RNDIS device", 576 .flags = FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT, 577 .bind = rndis_bind, 578 .unbind = rndis_unbind, 579 .status = rndis_status, 580 .rx_fixup = rndis_rx_fixup, 581 .tx_fixup = rndis_tx_fixup, 582 }; 583 584 /*-------------------------------------------------------------------------*/ 585 586 static const struct usb_device_id products [] = { 587 { 588 /* RNDIS is MSFT's un-official variant of CDC ACM */ 589 USB_INTERFACE_INFO(USB_CLASS_COMM, 2 /* ACM */, 0x0ff), 590 .driver_info = (unsigned long) &rndis_info, 591 }, { 592 /* "ActiveSync" is an undocumented variant of RNDIS, used in WM5 */ 593 USB_INTERFACE_INFO(USB_CLASS_MISC, 1, 1), 594 .driver_info = (unsigned long) &rndis_info, 595 }, { 596 /* RNDIS for tethering */ 597 USB_INTERFACE_INFO(USB_CLASS_WIRELESS_CONTROLLER, 1, 3), 598 .driver_info = (unsigned long) &rndis_info, 599 }, 600 { }, // END 601 }; 602 MODULE_DEVICE_TABLE(usb, products); 603 604 static struct usb_driver rndis_driver = { 605 .name = "rndis_host", 606 .id_table = products, 607 .probe = usbnet_probe, 608 .disconnect = usbnet_disconnect, 609 .suspend = usbnet_suspend, 610 .resume = usbnet_resume, 611 }; 612 613 static int __init rndis_init(void) 614 { 615 return usb_register(&rndis_driver); 616 } 617 module_init(rndis_init); 618 619 static void __exit rndis_exit(void) 620 { 621 usb_deregister(&rndis_driver); 622 } 623 module_exit(rndis_exit); 624 625 MODULE_AUTHOR("David Brownell"); 626 MODULE_DESCRIPTION("USB Host side RNDIS driver"); 627 MODULE_LICENSE("GPL"); 628