1 /* 2 * cdc_ncm.c 3 * 4 * Copyright (C) ST-Ericsson 2010-2012 5 * Contact: Alexey Orishko <alexey.orishko@stericsson.com> 6 * Original author: Hans Petter Selasky <hans.petter.selasky@stericsson.com> 7 * 8 * USB Host Driver for Network Control Model (NCM) 9 * http://www.usb.org/developers/devclass_docs/NCM10.zip 10 * 11 * The NCM encoding, decoding and initialization logic 12 * derives from FreeBSD 8.x. if_cdce.c and if_cdcereg.h 13 * 14 * This software is available to you under a choice of one of two 15 * licenses. You may choose this file to be licensed under the terms 16 * of the GNU General Public License (GPL) Version 2 or the 2-clause 17 * BSD license listed below: 18 * 19 * Redistribution and use in source and binary forms, with or without 20 * modification, are permitted provided that the following conditions 21 * are met: 22 * 1. Redistributions of source code must retain the above copyright 23 * notice, this list of conditions and the following disclaimer. 24 * 2. Redistributions in binary form must reproduce the above copyright 25 * notice, this list of conditions and the following disclaimer in the 26 * documentation and/or other materials provided with the distribution. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #include <linux/module.h> 42 #include <linux/init.h> 43 #include <linux/netdevice.h> 44 #include <linux/ctype.h> 45 #include <linux/ethtool.h> 46 #include <linux/workqueue.h> 47 #include <linux/mii.h> 48 #include <linux/crc32.h> 49 #include <linux/usb.h> 50 #include <linux/hrtimer.h> 51 #include <linux/atomic.h> 52 #include <linux/usb/usbnet.h> 53 #include <linux/usb/cdc.h> 54 #include <linux/usb/cdc_ncm.h> 55 56 #define DRIVER_VERSION "14-Mar-2012" 57 58 static void cdc_ncm_txpath_bh(unsigned long param); 59 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); 60 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); 61 static struct usb_driver cdc_ncm_driver; 62 63 static void 64 cdc_ncm_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 65 { 66 struct usbnet *dev = netdev_priv(net); 67 68 strncpy(info->driver, dev->driver_name, sizeof(info->driver)); 69 strncpy(info->version, DRIVER_VERSION, sizeof(info->version)); 70 strncpy(info->fw_version, dev->driver_info->description, 71 sizeof(info->fw_version)); 72 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info)); 73 } 74 75 static u8 cdc_ncm_setup(struct cdc_ncm_ctx *ctx) 76 { 77 u32 val; 78 u8 flags; 79 u8 iface_no; 80 int err; 81 int eth_hlen; 82 u16 ntb_fmt_supported; 83 u32 min_dgram_size; 84 u32 min_hdr_size; 85 struct usbnet *dev = netdev_priv(ctx->netdev); 86 87 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 88 89 err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, 90 USB_TYPE_CLASS | USB_DIR_IN 91 |USB_RECIP_INTERFACE, 92 0, iface_no, &ctx->ncm_parm, 93 sizeof(ctx->ncm_parm)); 94 if (err < 0) { 95 pr_debug("failed GET_NTB_PARAMETERS\n"); 96 return 1; 97 } 98 99 /* read correct set of parameters according to device mode */ 100 ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); 101 ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); 102 ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); 103 ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); 104 ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); 105 /* devices prior to NCM Errata shall set this field to zero */ 106 ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); 107 ntb_fmt_supported = le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported); 108 109 eth_hlen = ETH_HLEN; 110 min_dgram_size = CDC_NCM_MIN_DATAGRAM_SIZE; 111 min_hdr_size = CDC_NCM_MIN_HDR_SIZE; 112 if (ctx->mbim_desc != NULL) { 113 flags = ctx->mbim_desc->bmNetworkCapabilities; 114 eth_hlen = 0; 115 min_dgram_size = CDC_MBIM_MIN_DATAGRAM_SIZE; 116 min_hdr_size = 0; 117 } else if (ctx->func_desc != NULL) { 118 flags = ctx->func_desc->bmNetworkCapabilities; 119 } else { 120 flags = 0; 121 } 122 123 pr_debug("dwNtbInMaxSize=%u dwNtbOutMaxSize=%u " 124 "wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u " 125 "wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", 126 ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, 127 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, flags); 128 129 /* max count of tx datagrams */ 130 if ((ctx->tx_max_datagrams == 0) || 131 (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) 132 ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; 133 134 /* verify maximum size of received NTB in bytes */ 135 if (ctx->rx_max < USB_CDC_NCM_NTB_MIN_IN_SIZE) { 136 pr_debug("Using min receive length=%d\n", 137 USB_CDC_NCM_NTB_MIN_IN_SIZE); 138 ctx->rx_max = USB_CDC_NCM_NTB_MIN_IN_SIZE; 139 } 140 141 if (ctx->rx_max > CDC_NCM_NTB_MAX_SIZE_RX) { 142 pr_debug("Using default maximum receive length=%d\n", 143 CDC_NCM_NTB_MAX_SIZE_RX); 144 ctx->rx_max = CDC_NCM_NTB_MAX_SIZE_RX; 145 } 146 147 /* inform device about NTB input size changes */ 148 if (ctx->rx_max != le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)) { 149 __le32 dwNtbInMaxSize = cpu_to_le32(ctx->rx_max); 150 151 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, 152 USB_TYPE_CLASS | USB_DIR_OUT 153 | USB_RECIP_INTERFACE, 154 0, iface_no, &dwNtbInMaxSize, 4); 155 if (err < 0) 156 pr_debug("Setting NTB Input Size failed\n"); 157 } 158 159 /* verify maximum size of transmitted NTB in bytes */ 160 if ((ctx->tx_max < 161 (min_hdr_size + min_dgram_size)) || 162 (ctx->tx_max > CDC_NCM_NTB_MAX_SIZE_TX)) { 163 pr_debug("Using default maximum transmit length=%d\n", 164 CDC_NCM_NTB_MAX_SIZE_TX); 165 ctx->tx_max = CDC_NCM_NTB_MAX_SIZE_TX; 166 } 167 168 /* 169 * verify that the structure alignment is: 170 * - power of two 171 * - not greater than the maximum transmit length 172 * - not less than four bytes 173 */ 174 val = ctx->tx_ndp_modulus; 175 176 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 177 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 178 pr_debug("Using default alignment: 4 bytes\n"); 179 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 180 } 181 182 /* 183 * verify that the payload alignment is: 184 * - power of two 185 * - not greater than the maximum transmit length 186 * - not less than four bytes 187 */ 188 val = ctx->tx_modulus; 189 190 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 191 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 192 pr_debug("Using default transmit modulus: 4 bytes\n"); 193 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 194 } 195 196 /* verify the payload remainder */ 197 if (ctx->tx_remainder >= ctx->tx_modulus) { 198 pr_debug("Using default transmit remainder: 0 bytes\n"); 199 ctx->tx_remainder = 0; 200 } 201 202 /* adjust TX-remainder according to NCM specification. */ 203 ctx->tx_remainder = ((ctx->tx_remainder - eth_hlen) & 204 (ctx->tx_modulus - 1)); 205 206 /* additional configuration */ 207 208 /* set CRC Mode */ 209 if (flags & USB_CDC_NCM_NCAP_CRC_MODE) { 210 err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, 211 USB_TYPE_CLASS | USB_DIR_OUT 212 | USB_RECIP_INTERFACE, 213 USB_CDC_NCM_CRC_NOT_APPENDED, 214 iface_no, NULL, 0); 215 if (err < 0) 216 pr_debug("Setting CRC mode off failed\n"); 217 } 218 219 /* set NTB format, if both formats are supported */ 220 if (ntb_fmt_supported & USB_CDC_NCM_NTH32_SIGN) { 221 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, 222 USB_TYPE_CLASS | USB_DIR_OUT 223 | USB_RECIP_INTERFACE, 224 USB_CDC_NCM_NTB16_FORMAT, 225 iface_no, NULL, 0); 226 if (err < 0) 227 pr_debug("Setting NTB format to 16-bit failed\n"); 228 } 229 230 ctx->max_datagram_size = min_dgram_size; 231 232 /* set Max Datagram Size (MTU) */ 233 if (flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE) { 234 __le16 max_datagram_size; 235 u16 eth_max_sz; 236 if (ctx->ether_desc != NULL) 237 eth_max_sz = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 238 else if (ctx->mbim_desc != NULL) 239 eth_max_sz = le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); 240 else 241 goto max_dgram_err; 242 243 err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, 244 USB_TYPE_CLASS | USB_DIR_IN 245 | USB_RECIP_INTERFACE, 246 0, iface_no, &max_datagram_size, 2); 247 if (err < 0) { 248 pr_debug("GET_MAX_DATAGRAM_SIZE failed, use size=%u\n", 249 min_dgram_size); 250 } else { 251 ctx->max_datagram_size = 252 le16_to_cpu(max_datagram_size); 253 /* Check Eth descriptor value */ 254 if (ctx->max_datagram_size > eth_max_sz) 255 ctx->max_datagram_size = eth_max_sz; 256 257 if (ctx->max_datagram_size > CDC_NCM_MAX_DATAGRAM_SIZE) 258 ctx->max_datagram_size = CDC_NCM_MAX_DATAGRAM_SIZE; 259 260 if (ctx->max_datagram_size < min_dgram_size) 261 ctx->max_datagram_size = min_dgram_size; 262 263 /* if value changed, update device */ 264 if (ctx->max_datagram_size != 265 le16_to_cpu(max_datagram_size)) { 266 err = usbnet_write_cmd(dev, 267 USB_CDC_SET_MAX_DATAGRAM_SIZE, 268 USB_TYPE_CLASS | USB_DIR_OUT 269 | USB_RECIP_INTERFACE, 270 0, 271 iface_no, &max_datagram_size, 272 2); 273 if (err < 0) 274 pr_debug("SET_MAX_DGRAM_SIZE failed\n"); 275 } 276 } 277 } 278 279 max_dgram_err: 280 if (ctx->netdev->mtu != (ctx->max_datagram_size - eth_hlen)) 281 ctx->netdev->mtu = ctx->max_datagram_size - eth_hlen; 282 283 return 0; 284 } 285 286 static void 287 cdc_ncm_find_endpoints(struct cdc_ncm_ctx *ctx, struct usb_interface *intf) 288 { 289 struct usb_host_endpoint *e; 290 u8 ep; 291 292 for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { 293 294 e = intf->cur_altsetting->endpoint + ep; 295 switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 296 case USB_ENDPOINT_XFER_INT: 297 if (usb_endpoint_dir_in(&e->desc)) { 298 if (ctx->status_ep == NULL) 299 ctx->status_ep = e; 300 } 301 break; 302 303 case USB_ENDPOINT_XFER_BULK: 304 if (usb_endpoint_dir_in(&e->desc)) { 305 if (ctx->in_ep == NULL) 306 ctx->in_ep = e; 307 } else { 308 if (ctx->out_ep == NULL) 309 ctx->out_ep = e; 310 } 311 break; 312 313 default: 314 break; 315 } 316 } 317 } 318 319 static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) 320 { 321 if (ctx == NULL) 322 return; 323 324 if (ctx->tx_rem_skb != NULL) { 325 dev_kfree_skb_any(ctx->tx_rem_skb); 326 ctx->tx_rem_skb = NULL; 327 } 328 329 if (ctx->tx_curr_skb != NULL) { 330 dev_kfree_skb_any(ctx->tx_curr_skb); 331 ctx->tx_curr_skb = NULL; 332 } 333 334 kfree(ctx); 335 } 336 337 static const struct ethtool_ops cdc_ncm_ethtool_ops = { 338 .get_drvinfo = cdc_ncm_get_drvinfo, 339 .get_link = usbnet_get_link, 340 .get_msglevel = usbnet_get_msglevel, 341 .set_msglevel = usbnet_set_msglevel, 342 .get_settings = usbnet_get_settings, 343 .set_settings = usbnet_set_settings, 344 .nway_reset = usbnet_nway_reset, 345 }; 346 347 int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting) 348 { 349 struct cdc_ncm_ctx *ctx; 350 struct usb_driver *driver; 351 u8 *buf; 352 int len; 353 int temp; 354 u8 iface_no; 355 356 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 357 if (ctx == NULL) 358 return -ENODEV; 359 360 hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 361 ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; 362 ctx->bh.data = (unsigned long)ctx; 363 ctx->bh.func = cdc_ncm_txpath_bh; 364 atomic_set(&ctx->stop, 0); 365 spin_lock_init(&ctx->mtx); 366 ctx->netdev = dev->net; 367 368 /* store ctx pointer in device data field */ 369 dev->data[0] = (unsigned long)ctx; 370 371 /* get some pointers */ 372 driver = driver_of(intf); 373 buf = intf->cur_altsetting->extra; 374 len = intf->cur_altsetting->extralen; 375 376 ctx->udev = dev->udev; 377 ctx->intf = intf; 378 379 /* parse through descriptors associated with control interface */ 380 while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) { 381 382 if (buf[1] != USB_DT_CS_INTERFACE) 383 goto advance; 384 385 switch (buf[2]) { 386 case USB_CDC_UNION_TYPE: 387 if (buf[0] < sizeof(*(ctx->union_desc))) 388 break; 389 390 ctx->union_desc = 391 (const struct usb_cdc_union_desc *)buf; 392 393 ctx->control = usb_ifnum_to_if(dev->udev, 394 ctx->union_desc->bMasterInterface0); 395 ctx->data = usb_ifnum_to_if(dev->udev, 396 ctx->union_desc->bSlaveInterface0); 397 break; 398 399 case USB_CDC_ETHERNET_TYPE: 400 if (buf[0] < sizeof(*(ctx->ether_desc))) 401 break; 402 403 ctx->ether_desc = 404 (const struct usb_cdc_ether_desc *)buf; 405 dev->hard_mtu = 406 le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 407 408 if (dev->hard_mtu < CDC_NCM_MIN_DATAGRAM_SIZE) 409 dev->hard_mtu = CDC_NCM_MIN_DATAGRAM_SIZE; 410 else if (dev->hard_mtu > CDC_NCM_MAX_DATAGRAM_SIZE) 411 dev->hard_mtu = CDC_NCM_MAX_DATAGRAM_SIZE; 412 break; 413 414 case USB_CDC_NCM_TYPE: 415 if (buf[0] < sizeof(*(ctx->func_desc))) 416 break; 417 418 ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf; 419 break; 420 421 case USB_CDC_MBIM_TYPE: 422 if (buf[0] < sizeof(*(ctx->mbim_desc))) 423 break; 424 425 ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf; 426 break; 427 428 default: 429 break; 430 } 431 advance: 432 /* advance to next descriptor */ 433 temp = buf[0]; 434 buf += temp; 435 len -= temp; 436 } 437 438 /* check if we got everything */ 439 if ((ctx->control == NULL) || (ctx->data == NULL) || 440 ((!ctx->mbim_desc) && ((ctx->ether_desc == NULL) || (ctx->control != intf)))) 441 goto error; 442 443 /* claim data interface, if different from control */ 444 if (ctx->data != ctx->control) { 445 temp = usb_driver_claim_interface(driver, ctx->data, dev); 446 if (temp) 447 goto error; 448 } 449 450 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; 451 452 /* reset data interface */ 453 temp = usb_set_interface(dev->udev, iface_no, 0); 454 if (temp) 455 goto error2; 456 457 /* initialize data interface */ 458 if (cdc_ncm_setup(ctx)) 459 goto error2; 460 461 /* configure data interface */ 462 temp = usb_set_interface(dev->udev, iface_no, data_altsetting); 463 if (temp) 464 goto error2; 465 466 cdc_ncm_find_endpoints(ctx, ctx->data); 467 cdc_ncm_find_endpoints(ctx, ctx->control); 468 469 if ((ctx->in_ep == NULL) || (ctx->out_ep == NULL) || 470 (ctx->status_ep == NULL)) 471 goto error2; 472 473 dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; 474 475 usb_set_intfdata(ctx->data, dev); 476 usb_set_intfdata(ctx->control, dev); 477 usb_set_intfdata(ctx->intf, dev); 478 479 if (ctx->ether_desc) { 480 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); 481 if (temp) 482 goto error2; 483 dev_info(&dev->udev->dev, "MAC-Address: %pM\n", dev->net->dev_addr); 484 } 485 486 487 dev->in = usb_rcvbulkpipe(dev->udev, 488 ctx->in_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); 489 dev->out = usb_sndbulkpipe(dev->udev, 490 ctx->out_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); 491 dev->status = ctx->status_ep; 492 dev->rx_urb_size = ctx->rx_max; 493 494 ctx->tx_speed = ctx->rx_speed = 0; 495 return 0; 496 497 error2: 498 usb_set_intfdata(ctx->control, NULL); 499 usb_set_intfdata(ctx->data, NULL); 500 usb_driver_release_interface(driver, ctx->data); 501 error: 502 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); 503 dev->data[0] = 0; 504 dev_info(&dev->udev->dev, "bind() failure\n"); 505 return -ENODEV; 506 } 507 EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); 508 509 void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) 510 { 511 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 512 struct usb_driver *driver = driver_of(intf); 513 514 if (ctx == NULL) 515 return; /* no setup */ 516 517 atomic_set(&ctx->stop, 1); 518 519 if (hrtimer_active(&ctx->tx_timer)) 520 hrtimer_cancel(&ctx->tx_timer); 521 522 tasklet_kill(&ctx->bh); 523 524 /* handle devices with combined control and data interface */ 525 if (ctx->control == ctx->data) 526 ctx->data = NULL; 527 528 /* disconnect master --> disconnect slave */ 529 if (intf == ctx->control && ctx->data) { 530 usb_set_intfdata(ctx->data, NULL); 531 usb_driver_release_interface(driver, ctx->data); 532 ctx->data = NULL; 533 534 } else if (intf == ctx->data && ctx->control) { 535 usb_set_intfdata(ctx->control, NULL); 536 usb_driver_release_interface(driver, ctx->control); 537 ctx->control = NULL; 538 } 539 540 usb_set_intfdata(ctx->intf, NULL); 541 cdc_ncm_free(ctx); 542 } 543 EXPORT_SYMBOL_GPL(cdc_ncm_unbind); 544 545 static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) 546 { 547 int ret; 548 549 /* The MBIM spec defines a NCM compatible default altsetting, 550 * which we may have matched: 551 * 552 * "Functions that implement both NCM 1.0 and MBIM (an 553 * “NCM/MBIM function”) according to this recommendation 554 * shall provide two alternate settings for the 555 * Communication Interface. Alternate setting 0, and the 556 * associated class and endpoint descriptors, shall be 557 * constructed according to the rules given for the 558 * Communication Interface in section 5 of [USBNCM10]. 559 * Alternate setting 1, and the associated class and 560 * endpoint descriptors, shall be constructed according to 561 * the rules given in section 6 (USB Device Model) of this 562 * specification." 563 * 564 * Do not bind to such interfaces, allowing cdc_mbim to handle 565 * them 566 */ 567 #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM) 568 if ((intf->num_altsetting == 2) && 569 !usb_set_interface(dev->udev, 570 intf->cur_altsetting->desc.bInterfaceNumber, 571 CDC_NCM_COMM_ALTSETTING_MBIM) && 572 cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) 573 return -ENODEV; 574 #endif 575 576 /* NCM data altsetting is always 1 */ 577 ret = cdc_ncm_bind_common(dev, intf, 1); 578 579 /* 580 * We should get an event when network connection is "connected" or 581 * "disconnected". Set network connection in "disconnected" state 582 * (carrier is OFF) during attach, so the IP network stack does not 583 * start IPv6 negotiation and more. 584 */ 585 netif_carrier_off(dev->net); 586 return ret; 587 } 588 589 static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) 590 { 591 size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; 592 593 if (skb->len + align > max) 594 align = max - skb->len; 595 if (align && skb_tailroom(skb) >= align) 596 memset(skb_put(skb, align), 0, align); 597 } 598 599 /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly 600 * allocating a new one within skb 601 */ 602 static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) 603 { 604 struct usb_cdc_ncm_ndp16 *ndp16 = NULL; 605 struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; 606 size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); 607 608 /* follow the chain of NDPs, looking for a match */ 609 while (ndpoffset) { 610 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); 611 if (ndp16->dwSignature == sign) 612 return ndp16; 613 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 614 } 615 616 /* align new NDP */ 617 cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max); 618 619 /* verify that there is room for the NDP and the datagram (reserve) */ 620 if ((ctx->tx_max - skb->len - reserve) < CDC_NCM_NDP_SIZE) 621 return NULL; 622 623 /* link to it */ 624 if (ndp16) 625 ndp16->wNextNdpIndex = cpu_to_le16(skb->len); 626 else 627 nth16->wNdpIndex = cpu_to_le16(skb->len); 628 629 /* push a new empty NDP */ 630 ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, CDC_NCM_NDP_SIZE), 0, CDC_NCM_NDP_SIZE); 631 ndp16->dwSignature = sign; 632 ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); 633 return ndp16; 634 } 635 636 struct sk_buff * 637 cdc_ncm_fill_tx_frame(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign) 638 { 639 struct usb_cdc_ncm_nth16 *nth16; 640 struct usb_cdc_ncm_ndp16 *ndp16; 641 struct sk_buff *skb_out; 642 u16 n = 0, index, ndplen; 643 u8 ready2send = 0; 644 645 /* if there is a remaining skb, it gets priority */ 646 if (skb != NULL) { 647 swap(skb, ctx->tx_rem_skb); 648 swap(sign, ctx->tx_rem_sign); 649 } else { 650 ready2send = 1; 651 } 652 653 /* check if we are resuming an OUT skb */ 654 skb_out = ctx->tx_curr_skb; 655 656 /* allocate a new OUT skb */ 657 if (!skb_out) { 658 skb_out = alloc_skb((ctx->tx_max + 1), GFP_ATOMIC); 659 if (skb_out == NULL) { 660 if (skb != NULL) { 661 dev_kfree_skb_any(skb); 662 ctx->netdev->stats.tx_dropped++; 663 } 664 goto exit_no_skb; 665 } 666 /* fill out the initial 16-bit NTB header */ 667 nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16)); 668 nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); 669 nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); 670 nth16->wSequence = cpu_to_le16(ctx->tx_seq++); 671 672 /* count total number of frames in this NTB */ 673 ctx->tx_curr_frame_num = 0; 674 } 675 676 for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { 677 /* send any remaining skb first */ 678 if (skb == NULL) { 679 skb = ctx->tx_rem_skb; 680 sign = ctx->tx_rem_sign; 681 ctx->tx_rem_skb = NULL; 682 683 /* check for end of skb */ 684 if (skb == NULL) 685 break; 686 } 687 688 /* get the appropriate NDP for this skb */ 689 ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); 690 691 /* align beginning of next frame */ 692 cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max); 693 694 /* check if we had enough room left for both NDP and frame */ 695 if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) { 696 if (n == 0) { 697 /* won't fit, MTU problem? */ 698 dev_kfree_skb_any(skb); 699 skb = NULL; 700 ctx->netdev->stats.tx_dropped++; 701 } else { 702 /* no room for skb - store for later */ 703 if (ctx->tx_rem_skb != NULL) { 704 dev_kfree_skb_any(ctx->tx_rem_skb); 705 ctx->netdev->stats.tx_dropped++; 706 } 707 ctx->tx_rem_skb = skb; 708 ctx->tx_rem_sign = sign; 709 skb = NULL; 710 ready2send = 1; 711 } 712 break; 713 } 714 715 /* calculate frame number withing this NDP */ 716 ndplen = le16_to_cpu(ndp16->wLength); 717 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; 718 719 /* OK, add this skb */ 720 ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); 721 ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); 722 ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); 723 memcpy(skb_put(skb_out, skb->len), skb->data, skb->len); 724 dev_kfree_skb_any(skb); 725 skb = NULL; 726 727 /* send now if this NDP is full */ 728 if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { 729 ready2send = 1; 730 break; 731 } 732 } 733 734 /* free up any dangling skb */ 735 if (skb != NULL) { 736 dev_kfree_skb_any(skb); 737 skb = NULL; 738 ctx->netdev->stats.tx_dropped++; 739 } 740 741 ctx->tx_curr_frame_num = n; 742 743 if (n == 0) { 744 /* wait for more frames */ 745 /* push variables */ 746 ctx->tx_curr_skb = skb_out; 747 goto exit_no_skb; 748 749 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) { 750 /* wait for more frames */ 751 /* push variables */ 752 ctx->tx_curr_skb = skb_out; 753 /* set the pending count */ 754 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) 755 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; 756 goto exit_no_skb; 757 758 } else { 759 /* frame goes out */ 760 /* variables will be reset at next call */ 761 } 762 763 /* 764 * If collected data size is less or equal CDC_NCM_MIN_TX_PKT bytes, 765 * we send buffers as it is. If we get more data, it would be more 766 * efficient for USB HS mobile device with DMA engine to receive a full 767 * size NTB, than canceling DMA transfer and receiving a short packet. 768 */ 769 if (skb_out->len > CDC_NCM_MIN_TX_PKT) 770 /* final zero padding */ 771 memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0, ctx->tx_max - skb_out->len); 772 773 /* do we need to prevent a ZLP? */ 774 if (((skb_out->len % le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0) && 775 (skb_out->len < le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)) && skb_tailroom(skb_out)) 776 *skb_put(skb_out, 1) = 0; /* force short packet */ 777 778 /* set final frame length */ 779 nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 780 nth16->wBlockLength = cpu_to_le16(skb_out->len); 781 782 /* return skb */ 783 ctx->tx_curr_skb = NULL; 784 ctx->netdev->stats.tx_packets += ctx->tx_curr_frame_num; 785 return skb_out; 786 787 exit_no_skb: 788 /* Start timer, if there is a remaining skb */ 789 if (ctx->tx_curr_skb != NULL) 790 cdc_ncm_tx_timeout_start(ctx); 791 return NULL; 792 } 793 EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); 794 795 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) 796 { 797 /* start timer, if not already started */ 798 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) 799 hrtimer_start(&ctx->tx_timer, 800 ktime_set(0, CDC_NCM_TIMER_INTERVAL), 801 HRTIMER_MODE_REL); 802 } 803 804 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) 805 { 806 struct cdc_ncm_ctx *ctx = 807 container_of(timer, struct cdc_ncm_ctx, tx_timer); 808 809 if (!atomic_read(&ctx->stop)) 810 tasklet_schedule(&ctx->bh); 811 return HRTIMER_NORESTART; 812 } 813 814 static void cdc_ncm_txpath_bh(unsigned long param) 815 { 816 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)param; 817 818 spin_lock_bh(&ctx->mtx); 819 if (ctx->tx_timer_pending != 0) { 820 ctx->tx_timer_pending--; 821 cdc_ncm_tx_timeout_start(ctx); 822 spin_unlock_bh(&ctx->mtx); 823 } else if (ctx->netdev != NULL) { 824 spin_unlock_bh(&ctx->mtx); 825 netif_tx_lock_bh(ctx->netdev); 826 usbnet_start_xmit(NULL, ctx->netdev); 827 netif_tx_unlock_bh(ctx->netdev); 828 } else { 829 spin_unlock_bh(&ctx->mtx); 830 } 831 } 832 833 static struct sk_buff * 834 cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 835 { 836 struct sk_buff *skb_out; 837 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 838 839 /* 840 * The Ethernet API we are using does not support transmitting 841 * multiple Ethernet frames in a single call. This driver will 842 * accumulate multiple Ethernet frames and send out a larger 843 * USB frame when the USB buffer is full or when a single jiffies 844 * timeout happens. 845 */ 846 if (ctx == NULL) 847 goto error; 848 849 spin_lock_bh(&ctx->mtx); 850 skb_out = cdc_ncm_fill_tx_frame(ctx, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); 851 spin_unlock_bh(&ctx->mtx); 852 return skb_out; 853 854 error: 855 if (skb != NULL) 856 dev_kfree_skb_any(skb); 857 858 return NULL; 859 } 860 861 /* verify NTB header and return offset of first NDP, or negative error */ 862 int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) 863 { 864 struct usb_cdc_ncm_nth16 *nth16; 865 int len; 866 int ret = -EINVAL; 867 868 if (ctx == NULL) 869 goto error; 870 871 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + 872 sizeof(struct usb_cdc_ncm_ndp16))) { 873 pr_debug("frame too short\n"); 874 goto error; 875 } 876 877 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; 878 879 if (le32_to_cpu(nth16->dwSignature) != USB_CDC_NCM_NTH16_SIGN) { 880 pr_debug("invalid NTH16 signature <%u>\n", 881 le32_to_cpu(nth16->dwSignature)); 882 goto error; 883 } 884 885 len = le16_to_cpu(nth16->wBlockLength); 886 if (len > ctx->rx_max) { 887 pr_debug("unsupported NTB block length %u/%u\n", len, 888 ctx->rx_max); 889 goto error; 890 } 891 892 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && 893 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && 894 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { 895 pr_debug("sequence number glitch prev=%d curr=%d\n", 896 ctx->rx_seq, le16_to_cpu(nth16->wSequence)); 897 } 898 ctx->rx_seq = le16_to_cpu(nth16->wSequence); 899 900 ret = le16_to_cpu(nth16->wNdpIndex); 901 error: 902 return ret; 903 } 904 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); 905 906 /* verify NDP header and return number of datagrams, or negative error */ 907 int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) 908 { 909 struct usb_cdc_ncm_ndp16 *ndp16; 910 int ret = -EINVAL; 911 912 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { 913 pr_debug("invalid NDP offset <%u>\n", ndpoffset); 914 goto error; 915 } 916 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 917 918 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { 919 pr_debug("invalid DPT16 length <%u>\n", 920 le32_to_cpu(ndp16->dwSignature)); 921 goto error; 922 } 923 924 ret = ((le16_to_cpu(ndp16->wLength) - 925 sizeof(struct usb_cdc_ncm_ndp16)) / 926 sizeof(struct usb_cdc_ncm_dpe16)); 927 ret--; /* we process NDP entries except for the last one */ 928 929 if ((sizeof(struct usb_cdc_ncm_ndp16) + ret * (sizeof(struct usb_cdc_ncm_dpe16))) > 930 skb_in->len) { 931 pr_debug("Invalid nframes = %d\n", ret); 932 ret = -EINVAL; 933 } 934 935 error: 936 return ret; 937 } 938 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); 939 940 static int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) 941 { 942 struct sk_buff *skb; 943 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 944 int len; 945 int nframes; 946 int x; 947 int offset; 948 struct usb_cdc_ncm_ndp16 *ndp16; 949 struct usb_cdc_ncm_dpe16 *dpe16; 950 int ndpoffset; 951 int loopcount = 50; /* arbitrary max preventing infinite loop */ 952 953 ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); 954 if (ndpoffset < 0) 955 goto error; 956 957 next_ndp: 958 nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); 959 if (nframes < 0) 960 goto error; 961 962 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 963 964 if (le32_to_cpu(ndp16->dwSignature) != USB_CDC_NCM_NDP16_NOCRC_SIGN) { 965 pr_debug("invalid DPT16 signature <%u>\n", 966 le32_to_cpu(ndp16->dwSignature)); 967 goto err_ndp; 968 } 969 dpe16 = ndp16->dpe16; 970 971 for (x = 0; x < nframes; x++, dpe16++) { 972 offset = le16_to_cpu(dpe16->wDatagramIndex); 973 len = le16_to_cpu(dpe16->wDatagramLength); 974 975 /* 976 * CDC NCM ch. 3.7 977 * All entries after first NULL entry are to be ignored 978 */ 979 if ((offset == 0) || (len == 0)) { 980 if (!x) 981 goto err_ndp; /* empty NTB */ 982 break; 983 } 984 985 /* sanity checking */ 986 if (((offset + len) > skb_in->len) || 987 (len > ctx->rx_max) || (len < ETH_HLEN)) { 988 pr_debug("invalid frame detected (ignored)" 989 "offset[%u]=%u, length=%u, skb=%p\n", 990 x, offset, len, skb_in); 991 if (!x) 992 goto err_ndp; 993 break; 994 995 } else { 996 skb = skb_clone(skb_in, GFP_ATOMIC); 997 if (!skb) 998 goto error; 999 skb->len = len; 1000 skb->data = ((u8 *)skb_in->data) + offset; 1001 skb_set_tail_pointer(skb, len); 1002 usbnet_skb_return(dev, skb); 1003 } 1004 } 1005 err_ndp: 1006 /* are there more NDPs to process? */ 1007 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 1008 if (ndpoffset && loopcount--) 1009 goto next_ndp; 1010 1011 return 1; 1012 error: 1013 return 0; 1014 } 1015 1016 static void 1017 cdc_ncm_speed_change(struct cdc_ncm_ctx *ctx, 1018 struct usb_cdc_speed_change *data) 1019 { 1020 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); 1021 uint32_t tx_speed = le32_to_cpu(data->ULBitRate); 1022 1023 /* 1024 * Currently the USB-NET API does not support reporting the actual 1025 * device speed. Do print it instead. 1026 */ 1027 if ((tx_speed != ctx->tx_speed) || (rx_speed != ctx->rx_speed)) { 1028 ctx->tx_speed = tx_speed; 1029 ctx->rx_speed = rx_speed; 1030 1031 if ((tx_speed > 1000000) && (rx_speed > 1000000)) { 1032 printk(KERN_INFO KBUILD_MODNAME 1033 ": %s: %u mbit/s downlink " 1034 "%u mbit/s uplink\n", 1035 ctx->netdev->name, 1036 (unsigned int)(rx_speed / 1000000U), 1037 (unsigned int)(tx_speed / 1000000U)); 1038 } else { 1039 printk(KERN_INFO KBUILD_MODNAME 1040 ": %s: %u kbit/s downlink " 1041 "%u kbit/s uplink\n", 1042 ctx->netdev->name, 1043 (unsigned int)(rx_speed / 1000U), 1044 (unsigned int)(tx_speed / 1000U)); 1045 } 1046 } 1047 } 1048 1049 static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) 1050 { 1051 struct cdc_ncm_ctx *ctx; 1052 struct usb_cdc_notification *event; 1053 1054 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1055 1056 if (urb->actual_length < sizeof(*event)) 1057 return; 1058 1059 /* test for split data in 8-byte chunks */ 1060 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { 1061 cdc_ncm_speed_change(ctx, 1062 (struct usb_cdc_speed_change *)urb->transfer_buffer); 1063 return; 1064 } 1065 1066 event = urb->transfer_buffer; 1067 1068 switch (event->bNotificationType) { 1069 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 1070 /* 1071 * According to the CDC NCM specification ch.7.1 1072 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be 1073 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. 1074 */ 1075 ctx->connected = le16_to_cpu(event->wValue); 1076 1077 printk(KERN_INFO KBUILD_MODNAME ": %s: network connection:" 1078 " %sconnected\n", 1079 ctx->netdev->name, ctx->connected ? "" : "dis"); 1080 1081 if (ctx->connected) 1082 netif_carrier_on(dev->net); 1083 else { 1084 netif_carrier_off(dev->net); 1085 ctx->tx_speed = ctx->rx_speed = 0; 1086 } 1087 break; 1088 1089 case USB_CDC_NOTIFY_SPEED_CHANGE: 1090 if (urb->actual_length < (sizeof(*event) + 1091 sizeof(struct usb_cdc_speed_change))) 1092 set_bit(EVENT_STS_SPLIT, &dev->flags); 1093 else 1094 cdc_ncm_speed_change(ctx, 1095 (struct usb_cdc_speed_change *) &event[1]); 1096 break; 1097 1098 default: 1099 dev_err(&dev->udev->dev, "NCM: unexpected " 1100 "notification 0x%02x!\n", event->bNotificationType); 1101 break; 1102 } 1103 } 1104 1105 static int cdc_ncm_check_connect(struct usbnet *dev) 1106 { 1107 struct cdc_ncm_ctx *ctx; 1108 1109 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1110 if (ctx == NULL) 1111 return 1; /* disconnected */ 1112 1113 return !ctx->connected; 1114 } 1115 1116 static int 1117 cdc_ncm_probe(struct usb_interface *udev, const struct usb_device_id *prod) 1118 { 1119 return usbnet_probe(udev, prod); 1120 } 1121 1122 static void cdc_ncm_disconnect(struct usb_interface *intf) 1123 { 1124 struct usbnet *dev = usb_get_intfdata(intf); 1125 1126 if (dev == NULL) 1127 return; /* already disconnected */ 1128 1129 usbnet_disconnect(intf); 1130 } 1131 1132 static int cdc_ncm_manage_power(struct usbnet *dev, int status) 1133 { 1134 dev->intf->needs_remote_wakeup = status; 1135 return 0; 1136 } 1137 1138 static const struct driver_info cdc_ncm_info = { 1139 .description = "CDC NCM", 1140 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET, 1141 .bind = cdc_ncm_bind, 1142 .unbind = cdc_ncm_unbind, 1143 .check_connect = cdc_ncm_check_connect, 1144 .manage_power = cdc_ncm_manage_power, 1145 .status = cdc_ncm_status, 1146 .rx_fixup = cdc_ncm_rx_fixup, 1147 .tx_fixup = cdc_ncm_tx_fixup, 1148 }; 1149 1150 /* Same as cdc_ncm_info, but with FLAG_WWAN */ 1151 static const struct driver_info wwan_info = { 1152 .description = "Mobile Broadband Network Device", 1153 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1154 | FLAG_WWAN, 1155 .bind = cdc_ncm_bind, 1156 .unbind = cdc_ncm_unbind, 1157 .check_connect = cdc_ncm_check_connect, 1158 .manage_power = cdc_ncm_manage_power, 1159 .status = cdc_ncm_status, 1160 .rx_fixup = cdc_ncm_rx_fixup, 1161 .tx_fixup = cdc_ncm_tx_fixup, 1162 }; 1163 1164 static const struct usb_device_id cdc_devs[] = { 1165 /* Ericsson MBM devices like F5521gw */ 1166 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1167 | USB_DEVICE_ID_MATCH_VENDOR, 1168 .idVendor = 0x0bdb, 1169 .bInterfaceClass = USB_CLASS_COMM, 1170 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1171 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1172 .driver_info = (unsigned long) &wwan_info, 1173 }, 1174 1175 /* Dell branded MBM devices like DW5550 */ 1176 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1177 | USB_DEVICE_ID_MATCH_VENDOR, 1178 .idVendor = 0x413c, 1179 .bInterfaceClass = USB_CLASS_COMM, 1180 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1181 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1182 .driver_info = (unsigned long) &wwan_info, 1183 }, 1184 1185 /* Toshiba branded MBM devices */ 1186 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1187 | USB_DEVICE_ID_MATCH_VENDOR, 1188 .idVendor = 0x0930, 1189 .bInterfaceClass = USB_CLASS_COMM, 1190 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1191 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1192 .driver_info = (unsigned long) &wwan_info, 1193 }, 1194 1195 /* Huawei NCM devices disguised as vendor specific */ 1196 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x16), 1197 .driver_info = (unsigned long)&wwan_info, 1198 }, 1199 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x46), 1200 .driver_info = (unsigned long)&wwan_info, 1201 }, 1202 1203 /* Generic CDC-NCM devices */ 1204 { USB_INTERFACE_INFO(USB_CLASS_COMM, 1205 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1206 .driver_info = (unsigned long)&cdc_ncm_info, 1207 }, 1208 { 1209 }, 1210 }; 1211 MODULE_DEVICE_TABLE(usb, cdc_devs); 1212 1213 static struct usb_driver cdc_ncm_driver = { 1214 .name = "cdc_ncm", 1215 .id_table = cdc_devs, 1216 .probe = cdc_ncm_probe, 1217 .disconnect = cdc_ncm_disconnect, 1218 .suspend = usbnet_suspend, 1219 .resume = usbnet_resume, 1220 .reset_resume = usbnet_resume, 1221 .supports_autosuspend = 1, 1222 .disable_hub_initiated_lpm = 1, 1223 }; 1224 1225 module_usb_driver(cdc_ncm_driver); 1226 1227 MODULE_AUTHOR("Hans Petter Selasky"); 1228 MODULE_DESCRIPTION("USB CDC NCM host driver"); 1229 MODULE_LICENSE("Dual BSD/GPL"); 1230