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/netdevice.h> 43 #include <linux/ctype.h> 44 #include <linux/ethtool.h> 45 #include <linux/workqueue.h> 46 #include <linux/mii.h> 47 #include <linux/crc32.h> 48 #include <linux/usb.h> 49 #include <linux/hrtimer.h> 50 #include <linux/atomic.h> 51 #include <linux/usb/usbnet.h> 52 #include <linux/usb/cdc.h> 53 #include <linux/usb/cdc_ncm.h> 54 55 #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM) 56 static bool prefer_mbim = true; 57 #else 58 static bool prefer_mbim; 59 #endif 60 module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR); 61 MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions"); 62 63 static void cdc_ncm_txpath_bh(unsigned long param); 64 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); 65 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); 66 static struct usb_driver cdc_ncm_driver; 67 68 static int cdc_ncm_setup(struct usbnet *dev) 69 { 70 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 71 struct usb_cdc_ncm_ntb_parameters ncm_parm; 72 u32 val; 73 u8 flags; 74 u8 iface_no; 75 int err; 76 int eth_hlen; 77 u16 ntb_fmt_supported; 78 __le16 max_datagram_size; 79 80 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 81 82 err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, 83 USB_TYPE_CLASS | USB_DIR_IN 84 |USB_RECIP_INTERFACE, 85 0, iface_no, &ncm_parm, 86 sizeof(ncm_parm)); 87 if (err < 0) { 88 dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n"); 89 return err; /* GET_NTB_PARAMETERS is required */ 90 } 91 92 /* read correct set of parameters according to device mode */ 93 ctx->rx_max = le32_to_cpu(ncm_parm.dwNtbInMaxSize); 94 ctx->tx_max = le32_to_cpu(ncm_parm.dwNtbOutMaxSize); 95 ctx->tx_remainder = le16_to_cpu(ncm_parm.wNdpOutPayloadRemainder); 96 ctx->tx_modulus = le16_to_cpu(ncm_parm.wNdpOutDivisor); 97 ctx->tx_ndp_modulus = le16_to_cpu(ncm_parm.wNdpOutAlignment); 98 /* devices prior to NCM Errata shall set this field to zero */ 99 ctx->tx_max_datagrams = le16_to_cpu(ncm_parm.wNtbOutMaxDatagrams); 100 ntb_fmt_supported = le16_to_cpu(ncm_parm.bmNtbFormatsSupported); 101 102 /* there are some minor differences in NCM and MBIM defaults */ 103 if (cdc_ncm_comm_intf_is_mbim(ctx->control->cur_altsetting)) { 104 if (!ctx->mbim_desc) 105 return -EINVAL; 106 eth_hlen = 0; 107 flags = ctx->mbim_desc->bmNetworkCapabilities; 108 ctx->max_datagram_size = le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); 109 if (ctx->max_datagram_size < CDC_MBIM_MIN_DATAGRAM_SIZE) 110 ctx->max_datagram_size = CDC_MBIM_MIN_DATAGRAM_SIZE; 111 } else { 112 if (!ctx->func_desc) 113 return -EINVAL; 114 eth_hlen = ETH_HLEN; 115 flags = ctx->func_desc->bmNetworkCapabilities; 116 ctx->max_datagram_size = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 117 if (ctx->max_datagram_size < CDC_NCM_MIN_DATAGRAM_SIZE) 118 ctx->max_datagram_size = CDC_NCM_MIN_DATAGRAM_SIZE; 119 } 120 121 /* common absolute max for NCM and MBIM */ 122 if (ctx->max_datagram_size > CDC_NCM_MAX_DATAGRAM_SIZE) 123 ctx->max_datagram_size = CDC_NCM_MAX_DATAGRAM_SIZE; 124 125 dev_dbg(&dev->intf->dev, 126 "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", 127 ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, 128 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, flags); 129 130 /* max count of tx datagrams */ 131 if ((ctx->tx_max_datagrams == 0) || 132 (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) 133 ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; 134 135 /* verify maximum size of received NTB in bytes */ 136 if (ctx->rx_max < USB_CDC_NCM_NTB_MIN_IN_SIZE) { 137 dev_dbg(&dev->intf->dev, "Using min receive length=%d\n", 138 USB_CDC_NCM_NTB_MIN_IN_SIZE); 139 ctx->rx_max = USB_CDC_NCM_NTB_MIN_IN_SIZE; 140 } 141 142 if (ctx->rx_max > CDC_NCM_NTB_MAX_SIZE_RX) { 143 dev_dbg(&dev->intf->dev, "Using default maximum receive length=%d\n", 144 CDC_NCM_NTB_MAX_SIZE_RX); 145 ctx->rx_max = CDC_NCM_NTB_MAX_SIZE_RX; 146 } 147 148 /* inform device about NTB input size changes */ 149 if (ctx->rx_max != le32_to_cpu(ncm_parm.dwNtbInMaxSize)) { 150 __le32 dwNtbInMaxSize = cpu_to_le32(ctx->rx_max); 151 152 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, 153 USB_TYPE_CLASS | USB_DIR_OUT 154 | USB_RECIP_INTERFACE, 155 0, iface_no, &dwNtbInMaxSize, 4); 156 if (err < 0) 157 dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n"); 158 } 159 160 /* verify maximum size of transmitted NTB in bytes */ 161 if (ctx->tx_max > CDC_NCM_NTB_MAX_SIZE_TX) { 162 dev_dbg(&dev->intf->dev, "Using default maximum transmit length=%d\n", 163 CDC_NCM_NTB_MAX_SIZE_TX); 164 ctx->tx_max = CDC_NCM_NTB_MAX_SIZE_TX; 165 166 /* Adding a pad byte here simplifies the handling in 167 * cdc_ncm_fill_tx_frame, by making tx_max always 168 * represent the real skb max size. 169 */ 170 if (ctx->tx_max % usb_maxpacket(dev->udev, dev->out, 1) == 0) 171 ctx->tx_max++; 172 173 } 174 175 /* 176 * verify that the structure alignment is: 177 * - power of two 178 * - not greater than the maximum transmit length 179 * - not less than four bytes 180 */ 181 val = ctx->tx_ndp_modulus; 182 183 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 184 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 185 dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n"); 186 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 187 } 188 189 /* 190 * verify that the payload alignment is: 191 * - power of two 192 * - not greater than the maximum transmit length 193 * - not less than four bytes 194 */ 195 val = ctx->tx_modulus; 196 197 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 198 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 199 dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n"); 200 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 201 } 202 203 /* verify the payload remainder */ 204 if (ctx->tx_remainder >= ctx->tx_modulus) { 205 dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n"); 206 ctx->tx_remainder = 0; 207 } 208 209 /* adjust TX-remainder according to NCM specification. */ 210 ctx->tx_remainder = ((ctx->tx_remainder - eth_hlen) & 211 (ctx->tx_modulus - 1)); 212 213 /* additional configuration */ 214 215 /* set CRC Mode */ 216 if (flags & USB_CDC_NCM_NCAP_CRC_MODE) { 217 err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, 218 USB_TYPE_CLASS | USB_DIR_OUT 219 | USB_RECIP_INTERFACE, 220 USB_CDC_NCM_CRC_NOT_APPENDED, 221 iface_no, NULL, 0); 222 if (err < 0) 223 dev_dbg(&dev->intf->dev, "Setting CRC mode off failed\n"); 224 } 225 226 /* set NTB format, if both formats are supported */ 227 if (ntb_fmt_supported & USB_CDC_NCM_NTH32_SIGN) { 228 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, 229 USB_TYPE_CLASS | USB_DIR_OUT 230 | USB_RECIP_INTERFACE, 231 USB_CDC_NCM_NTB16_FORMAT, 232 iface_no, NULL, 0); 233 if (err < 0) 234 dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit failed\n"); 235 } 236 237 /* inform the device about the selected Max Datagram Size */ 238 if (!(flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE)) 239 goto out; 240 241 /* read current mtu value from device */ 242 err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, 243 USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE, 244 0, iface_no, &max_datagram_size, 2); 245 if (err < 0) { 246 dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n"); 247 goto out; 248 } 249 250 if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size) 251 goto out; 252 253 max_datagram_size = cpu_to_le16(ctx->max_datagram_size); 254 err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE, 255 USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE, 256 0, iface_no, &max_datagram_size, 2); 257 if (err < 0) 258 dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n"); 259 260 out: 261 /* set MTU to max supported by the device if necessary */ 262 if (dev->net->mtu > ctx->max_datagram_size - eth_hlen) 263 dev->net->mtu = ctx->max_datagram_size - eth_hlen; 264 return 0; 265 } 266 267 static void 268 cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf) 269 { 270 struct usb_host_endpoint *e, *in = NULL, *out = NULL; 271 u8 ep; 272 273 for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { 274 275 e = intf->cur_altsetting->endpoint + ep; 276 switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 277 case USB_ENDPOINT_XFER_INT: 278 if (usb_endpoint_dir_in(&e->desc)) { 279 if (!dev->status) 280 dev->status = e; 281 } 282 break; 283 284 case USB_ENDPOINT_XFER_BULK: 285 if (usb_endpoint_dir_in(&e->desc)) { 286 if (!in) 287 in = e; 288 } else { 289 if (!out) 290 out = e; 291 } 292 break; 293 294 default: 295 break; 296 } 297 } 298 if (in && !dev->in) 299 dev->in = usb_rcvbulkpipe(dev->udev, 300 in->desc.bEndpointAddress & 301 USB_ENDPOINT_NUMBER_MASK); 302 if (out && !dev->out) 303 dev->out = usb_sndbulkpipe(dev->udev, 304 out->desc.bEndpointAddress & 305 USB_ENDPOINT_NUMBER_MASK); 306 } 307 308 static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) 309 { 310 if (ctx == NULL) 311 return; 312 313 if (ctx->tx_rem_skb != NULL) { 314 dev_kfree_skb_any(ctx->tx_rem_skb); 315 ctx->tx_rem_skb = NULL; 316 } 317 318 if (ctx->tx_curr_skb != NULL) { 319 dev_kfree_skb_any(ctx->tx_curr_skb); 320 ctx->tx_curr_skb = NULL; 321 } 322 323 kfree(ctx); 324 } 325 326 int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting) 327 { 328 const struct usb_cdc_union_desc *union_desc = NULL; 329 struct cdc_ncm_ctx *ctx; 330 struct usb_driver *driver; 331 u8 *buf; 332 int len; 333 int temp; 334 u8 iface_no; 335 336 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 337 if (!ctx) 338 return -ENOMEM; 339 340 hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 341 ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; 342 ctx->bh.data = (unsigned long)dev; 343 ctx->bh.func = cdc_ncm_txpath_bh; 344 atomic_set(&ctx->stop, 0); 345 spin_lock_init(&ctx->mtx); 346 347 /* store ctx pointer in device data field */ 348 dev->data[0] = (unsigned long)ctx; 349 350 /* only the control interface can be successfully probed */ 351 ctx->control = intf; 352 353 /* get some pointers */ 354 driver = driver_of(intf); 355 buf = intf->cur_altsetting->extra; 356 len = intf->cur_altsetting->extralen; 357 358 /* parse through descriptors associated with control interface */ 359 while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) { 360 361 if (buf[1] != USB_DT_CS_INTERFACE) 362 goto advance; 363 364 switch (buf[2]) { 365 case USB_CDC_UNION_TYPE: 366 if (buf[0] < sizeof(*union_desc)) 367 break; 368 369 union_desc = (const struct usb_cdc_union_desc *)buf; 370 /* the master must be the interface we are probing */ 371 if (intf->cur_altsetting->desc.bInterfaceNumber != 372 union_desc->bMasterInterface0) { 373 dev_dbg(&intf->dev, "bogus CDC Union\n"); 374 goto error; 375 } 376 ctx->data = usb_ifnum_to_if(dev->udev, 377 union_desc->bSlaveInterface0); 378 break; 379 380 case USB_CDC_ETHERNET_TYPE: 381 if (buf[0] < sizeof(*(ctx->ether_desc))) 382 break; 383 384 ctx->ether_desc = 385 (const struct usb_cdc_ether_desc *)buf; 386 break; 387 388 case USB_CDC_NCM_TYPE: 389 if (buf[0] < sizeof(*(ctx->func_desc))) 390 break; 391 392 ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf; 393 break; 394 395 case USB_CDC_MBIM_TYPE: 396 if (buf[0] < sizeof(*(ctx->mbim_desc))) 397 break; 398 399 ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf; 400 break; 401 402 default: 403 break; 404 } 405 advance: 406 /* advance to next descriptor */ 407 temp = buf[0]; 408 buf += temp; 409 len -= temp; 410 } 411 412 /* some buggy devices have an IAD but no CDC Union */ 413 if (!union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) { 414 ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1); 415 dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n"); 416 } 417 418 /* check if we got everything */ 419 if (!ctx->data || (!ctx->mbim_desc && !ctx->ether_desc)) { 420 dev_dbg(&intf->dev, "CDC descriptors missing\n"); 421 goto error; 422 } 423 424 /* claim data interface, if different from control */ 425 if (ctx->data != ctx->control) { 426 temp = usb_driver_claim_interface(driver, ctx->data, dev); 427 if (temp) { 428 dev_dbg(&intf->dev, "failed to claim data intf\n"); 429 goto error; 430 } 431 } 432 433 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; 434 435 /* reset data interface */ 436 temp = usb_set_interface(dev->udev, iface_no, 0); 437 if (temp) { 438 dev_dbg(&intf->dev, "set interface failed\n"); 439 goto error2; 440 } 441 442 /* configure data interface */ 443 temp = usb_set_interface(dev->udev, iface_no, data_altsetting); 444 if (temp) { 445 dev_dbg(&intf->dev, "set interface failed\n"); 446 goto error2; 447 } 448 449 cdc_ncm_find_endpoints(dev, ctx->data); 450 cdc_ncm_find_endpoints(dev, ctx->control); 451 if (!dev->in || !dev->out || !dev->status) { 452 dev_dbg(&intf->dev, "failed to collect endpoints\n"); 453 goto error2; 454 } 455 456 /* initialize data interface */ 457 if (cdc_ncm_setup(dev)) { 458 dev_dbg(&intf->dev, "cdc_ncm_setup() failed\n"); 459 goto error2; 460 } 461 462 usb_set_intfdata(ctx->data, dev); 463 usb_set_intfdata(ctx->control, dev); 464 465 if (ctx->ether_desc) { 466 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); 467 if (temp) { 468 dev_dbg(&intf->dev, "failed to get mac address\n"); 469 goto error2; 470 } 471 dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr); 472 } 473 474 /* usbnet use these values for sizing tx/rx queues */ 475 dev->hard_mtu = ctx->tx_max; 476 dev->rx_urb_size = ctx->rx_max; 477 478 return 0; 479 480 error2: 481 usb_set_intfdata(ctx->control, NULL); 482 usb_set_intfdata(ctx->data, NULL); 483 if (ctx->data != ctx->control) 484 usb_driver_release_interface(driver, ctx->data); 485 error: 486 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); 487 dev->data[0] = 0; 488 dev_info(&intf->dev, "bind() failure\n"); 489 return -ENODEV; 490 } 491 EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); 492 493 void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) 494 { 495 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 496 struct usb_driver *driver = driver_of(intf); 497 498 if (ctx == NULL) 499 return; /* no setup */ 500 501 atomic_set(&ctx->stop, 1); 502 503 if (hrtimer_active(&ctx->tx_timer)) 504 hrtimer_cancel(&ctx->tx_timer); 505 506 tasklet_kill(&ctx->bh); 507 508 /* handle devices with combined control and data interface */ 509 if (ctx->control == ctx->data) 510 ctx->data = NULL; 511 512 /* disconnect master --> disconnect slave */ 513 if (intf == ctx->control && ctx->data) { 514 usb_set_intfdata(ctx->data, NULL); 515 usb_driver_release_interface(driver, ctx->data); 516 ctx->data = NULL; 517 518 } else if (intf == ctx->data && ctx->control) { 519 usb_set_intfdata(ctx->control, NULL); 520 usb_driver_release_interface(driver, ctx->control); 521 ctx->control = NULL; 522 } 523 524 usb_set_intfdata(intf, NULL); 525 cdc_ncm_free(ctx); 526 } 527 EXPORT_SYMBOL_GPL(cdc_ncm_unbind); 528 529 /* Select the MBIM altsetting iff it is preferred and available, 530 * returning the number of the corresponding data interface altsetting 531 */ 532 u8 cdc_ncm_select_altsetting(struct usbnet *dev, struct usb_interface *intf) 533 { 534 struct usb_host_interface *alt; 535 536 /* The MBIM spec defines a NCM compatible default altsetting, 537 * which we may have matched: 538 * 539 * "Functions that implement both NCM 1.0 and MBIM (an 540 * “NCM/MBIM function”) according to this recommendation 541 * shall provide two alternate settings for the 542 * Communication Interface. Alternate setting 0, and the 543 * associated class and endpoint descriptors, shall be 544 * constructed according to the rules given for the 545 * Communication Interface in section 5 of [USBNCM10]. 546 * Alternate setting 1, and the associated class and 547 * endpoint descriptors, shall be constructed according to 548 * the rules given in section 6 (USB Device Model) of this 549 * specification." 550 */ 551 if (prefer_mbim && intf->num_altsetting == 2) { 552 alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); 553 if (alt && cdc_ncm_comm_intf_is_mbim(alt) && 554 !usb_set_interface(dev->udev, 555 intf->cur_altsetting->desc.bInterfaceNumber, 556 CDC_NCM_COMM_ALTSETTING_MBIM)) 557 return CDC_NCM_DATA_ALTSETTING_MBIM; 558 } 559 return CDC_NCM_DATA_ALTSETTING_NCM; 560 } 561 EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); 562 563 static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) 564 { 565 int ret; 566 567 /* MBIM backwards compatible function? */ 568 cdc_ncm_select_altsetting(dev, intf); 569 if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) 570 return -ENODEV; 571 572 /* NCM data altsetting is always 1 */ 573 ret = cdc_ncm_bind_common(dev, intf, 1); 574 575 /* 576 * We should get an event when network connection is "connected" or 577 * "disconnected". Set network connection in "disconnected" state 578 * (carrier is OFF) during attach, so the IP network stack does not 579 * start IPv6 negotiation and more. 580 */ 581 usbnet_link_change(dev, 0, 0); 582 return ret; 583 } 584 585 static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) 586 { 587 size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; 588 589 if (skb->len + align > max) 590 align = max - skb->len; 591 if (align && skb_tailroom(skb) >= align) 592 memset(skb_put(skb, align), 0, align); 593 } 594 595 /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly 596 * allocating a new one within skb 597 */ 598 static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) 599 { 600 struct usb_cdc_ncm_ndp16 *ndp16 = NULL; 601 struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; 602 size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); 603 604 /* follow the chain of NDPs, looking for a match */ 605 while (ndpoffset) { 606 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); 607 if (ndp16->dwSignature == sign) 608 return ndp16; 609 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 610 } 611 612 /* align new NDP */ 613 cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max); 614 615 /* verify that there is room for the NDP and the datagram (reserve) */ 616 if ((ctx->tx_max - skb->len - reserve) < CDC_NCM_NDP_SIZE) 617 return NULL; 618 619 /* link to it */ 620 if (ndp16) 621 ndp16->wNextNdpIndex = cpu_to_le16(skb->len); 622 else 623 nth16->wNdpIndex = cpu_to_le16(skb->len); 624 625 /* push a new empty NDP */ 626 ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, CDC_NCM_NDP_SIZE), 0, CDC_NCM_NDP_SIZE); 627 ndp16->dwSignature = sign; 628 ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); 629 return ndp16; 630 } 631 632 struct sk_buff * 633 cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign) 634 { 635 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 636 struct usb_cdc_ncm_nth16 *nth16; 637 struct usb_cdc_ncm_ndp16 *ndp16; 638 struct sk_buff *skb_out; 639 u16 n = 0, index, ndplen; 640 u8 ready2send = 0; 641 642 /* if there is a remaining skb, it gets priority */ 643 if (skb != NULL) { 644 swap(skb, ctx->tx_rem_skb); 645 swap(sign, ctx->tx_rem_sign); 646 } else { 647 ready2send = 1; 648 } 649 650 /* check if we are resuming an OUT skb */ 651 skb_out = ctx->tx_curr_skb; 652 653 /* allocate a new OUT skb */ 654 if (!skb_out) { 655 skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC); 656 if (skb_out == NULL) { 657 if (skb != NULL) { 658 dev_kfree_skb_any(skb); 659 dev->net->stats.tx_dropped++; 660 } 661 goto exit_no_skb; 662 } 663 /* fill out the initial 16-bit NTB header */ 664 nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16)); 665 nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); 666 nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); 667 nth16->wSequence = cpu_to_le16(ctx->tx_seq++); 668 669 /* count total number of frames in this NTB */ 670 ctx->tx_curr_frame_num = 0; 671 } 672 673 for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { 674 /* send any remaining skb first */ 675 if (skb == NULL) { 676 skb = ctx->tx_rem_skb; 677 sign = ctx->tx_rem_sign; 678 ctx->tx_rem_skb = NULL; 679 680 /* check for end of skb */ 681 if (skb == NULL) 682 break; 683 } 684 685 /* get the appropriate NDP for this skb */ 686 ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); 687 688 /* align beginning of next frame */ 689 cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max); 690 691 /* check if we had enough room left for both NDP and frame */ 692 if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) { 693 if (n == 0) { 694 /* won't fit, MTU problem? */ 695 dev_kfree_skb_any(skb); 696 skb = NULL; 697 dev->net->stats.tx_dropped++; 698 } else { 699 /* no room for skb - store for later */ 700 if (ctx->tx_rem_skb != NULL) { 701 dev_kfree_skb_any(ctx->tx_rem_skb); 702 dev->net->stats.tx_dropped++; 703 } 704 ctx->tx_rem_skb = skb; 705 ctx->tx_rem_sign = sign; 706 skb = NULL; 707 ready2send = 1; 708 } 709 break; 710 } 711 712 /* calculate frame number withing this NDP */ 713 ndplen = le16_to_cpu(ndp16->wLength); 714 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; 715 716 /* OK, add this skb */ 717 ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); 718 ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); 719 ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); 720 memcpy(skb_put(skb_out, skb->len), skb->data, skb->len); 721 dev_kfree_skb_any(skb); 722 skb = NULL; 723 724 /* send now if this NDP is full */ 725 if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { 726 ready2send = 1; 727 break; 728 } 729 } 730 731 /* free up any dangling skb */ 732 if (skb != NULL) { 733 dev_kfree_skb_any(skb); 734 skb = NULL; 735 dev->net->stats.tx_dropped++; 736 } 737 738 ctx->tx_curr_frame_num = n; 739 740 if (n == 0) { 741 /* wait for more frames */ 742 /* push variables */ 743 ctx->tx_curr_skb = skb_out; 744 goto exit_no_skb; 745 746 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) { 747 /* wait for more frames */ 748 /* push variables */ 749 ctx->tx_curr_skb = skb_out; 750 /* set the pending count */ 751 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) 752 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; 753 goto exit_no_skb; 754 755 } else { 756 /* frame goes out */ 757 /* variables will be reset at next call */ 758 } 759 760 /* If collected data size is less or equal CDC_NCM_MIN_TX_PKT 761 * bytes, we send buffers as it is. If we get more data, it 762 * would be more efficient for USB HS mobile device with DMA 763 * engine to receive a full size NTB, than canceling DMA 764 * transfer and receiving a short packet. 765 * 766 * This optimization support is pointless if we end up sending 767 * a ZLP after full sized NTBs. 768 */ 769 if (!(dev->driver_info->flags & FLAG_SEND_ZLP) && 770 skb_out->len > CDC_NCM_MIN_TX_PKT) 771 memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0, 772 ctx->tx_max - skb_out->len); 773 else if ((skb_out->len % dev->maxpacket) == 0) 774 *skb_put(skb_out, 1) = 0; /* force short packet */ 775 776 /* set final frame length */ 777 nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 778 nth16->wBlockLength = cpu_to_le16(skb_out->len); 779 780 /* return skb */ 781 ctx->tx_curr_skb = NULL; 782 dev->net->stats.tx_packets += ctx->tx_curr_frame_num; 783 return skb_out; 784 785 exit_no_skb: 786 /* Start timer, if there is a remaining skb */ 787 if (ctx->tx_curr_skb != NULL) 788 cdc_ncm_tx_timeout_start(ctx); 789 return NULL; 790 } 791 EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); 792 793 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) 794 { 795 /* start timer, if not already started */ 796 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) 797 hrtimer_start(&ctx->tx_timer, 798 ktime_set(0, CDC_NCM_TIMER_INTERVAL), 799 HRTIMER_MODE_REL); 800 } 801 802 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) 803 { 804 struct cdc_ncm_ctx *ctx = 805 container_of(timer, struct cdc_ncm_ctx, tx_timer); 806 807 if (!atomic_read(&ctx->stop)) 808 tasklet_schedule(&ctx->bh); 809 return HRTIMER_NORESTART; 810 } 811 812 static void cdc_ncm_txpath_bh(unsigned long param) 813 { 814 struct usbnet *dev = (struct usbnet *)param; 815 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 816 817 spin_lock_bh(&ctx->mtx); 818 if (ctx->tx_timer_pending != 0) { 819 ctx->tx_timer_pending--; 820 cdc_ncm_tx_timeout_start(ctx); 821 spin_unlock_bh(&ctx->mtx); 822 } else if (dev->net != NULL) { 823 spin_unlock_bh(&ctx->mtx); 824 netif_tx_lock_bh(dev->net); 825 usbnet_start_xmit(NULL, dev->net); 826 netif_tx_unlock_bh(dev->net); 827 } else { 828 spin_unlock_bh(&ctx->mtx); 829 } 830 } 831 832 struct sk_buff * 833 cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 834 { 835 struct sk_buff *skb_out; 836 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 837 838 /* 839 * The Ethernet API we are using does not support transmitting 840 * multiple Ethernet frames in a single call. This driver will 841 * accumulate multiple Ethernet frames and send out a larger 842 * USB frame when the USB buffer is full or when a single jiffies 843 * timeout happens. 844 */ 845 if (ctx == NULL) 846 goto error; 847 848 spin_lock_bh(&ctx->mtx); 849 skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); 850 spin_unlock_bh(&ctx->mtx); 851 return skb_out; 852 853 error: 854 if (skb != NULL) 855 dev_kfree_skb_any(skb); 856 857 return NULL; 858 } 859 EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup); 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 usbnet *dev = netdev_priv(skb_in->dev); 865 struct usb_cdc_ncm_nth16 *nth16; 866 int len; 867 int ret = -EINVAL; 868 869 if (ctx == NULL) 870 goto error; 871 872 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + 873 sizeof(struct usb_cdc_ncm_ndp16))) { 874 netif_dbg(dev, rx_err, dev->net, "frame too short\n"); 875 goto error; 876 } 877 878 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; 879 880 if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) { 881 netif_dbg(dev, rx_err, dev->net, 882 "invalid NTH16 signature <%#010x>\n", 883 le32_to_cpu(nth16->dwSignature)); 884 goto error; 885 } 886 887 len = le16_to_cpu(nth16->wBlockLength); 888 if (len > ctx->rx_max) { 889 netif_dbg(dev, rx_err, dev->net, 890 "unsupported NTB block length %u/%u\n", len, 891 ctx->rx_max); 892 goto error; 893 } 894 895 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && 896 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && 897 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { 898 netif_dbg(dev, rx_err, dev->net, 899 "sequence number glitch prev=%d curr=%d\n", 900 ctx->rx_seq, le16_to_cpu(nth16->wSequence)); 901 } 902 ctx->rx_seq = le16_to_cpu(nth16->wSequence); 903 904 ret = le16_to_cpu(nth16->wNdpIndex); 905 error: 906 return ret; 907 } 908 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); 909 910 /* verify NDP header and return number of datagrams, or negative error */ 911 int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) 912 { 913 struct usbnet *dev = netdev_priv(skb_in->dev); 914 struct usb_cdc_ncm_ndp16 *ndp16; 915 int ret = -EINVAL; 916 917 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { 918 netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", 919 ndpoffset); 920 goto error; 921 } 922 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 923 924 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { 925 netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n", 926 le16_to_cpu(ndp16->wLength)); 927 goto error; 928 } 929 930 ret = ((le16_to_cpu(ndp16->wLength) - 931 sizeof(struct usb_cdc_ncm_ndp16)) / 932 sizeof(struct usb_cdc_ncm_dpe16)); 933 ret--; /* we process NDP entries except for the last one */ 934 935 if ((sizeof(struct usb_cdc_ncm_ndp16) + 936 ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) { 937 netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); 938 ret = -EINVAL; 939 } 940 941 error: 942 return ret; 943 } 944 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); 945 946 int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) 947 { 948 struct sk_buff *skb; 949 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 950 int len; 951 int nframes; 952 int x; 953 int offset; 954 struct usb_cdc_ncm_ndp16 *ndp16; 955 struct usb_cdc_ncm_dpe16 *dpe16; 956 int ndpoffset; 957 int loopcount = 50; /* arbitrary max preventing infinite loop */ 958 959 ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); 960 if (ndpoffset < 0) 961 goto error; 962 963 next_ndp: 964 nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); 965 if (nframes < 0) 966 goto error; 967 968 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 969 970 if (ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) { 971 netif_dbg(dev, rx_err, dev->net, 972 "invalid DPT16 signature <%#010x>\n", 973 le32_to_cpu(ndp16->dwSignature)); 974 goto err_ndp; 975 } 976 dpe16 = ndp16->dpe16; 977 978 for (x = 0; x < nframes; x++, dpe16++) { 979 offset = le16_to_cpu(dpe16->wDatagramIndex); 980 len = le16_to_cpu(dpe16->wDatagramLength); 981 982 /* 983 * CDC NCM ch. 3.7 984 * All entries after first NULL entry are to be ignored 985 */ 986 if ((offset == 0) || (len == 0)) { 987 if (!x) 988 goto err_ndp; /* empty NTB */ 989 break; 990 } 991 992 /* sanity checking */ 993 if (((offset + len) > skb_in->len) || 994 (len > ctx->rx_max) || (len < ETH_HLEN)) { 995 netif_dbg(dev, rx_err, dev->net, 996 "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n", 997 x, offset, len, skb_in); 998 if (!x) 999 goto err_ndp; 1000 break; 1001 1002 } else { 1003 skb = skb_clone(skb_in, GFP_ATOMIC); 1004 if (!skb) 1005 goto error; 1006 skb->len = len; 1007 skb->data = ((u8 *)skb_in->data) + offset; 1008 skb_set_tail_pointer(skb, len); 1009 usbnet_skb_return(dev, skb); 1010 } 1011 } 1012 err_ndp: 1013 /* are there more NDPs to process? */ 1014 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 1015 if (ndpoffset && loopcount--) 1016 goto next_ndp; 1017 1018 return 1; 1019 error: 1020 return 0; 1021 } 1022 EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup); 1023 1024 static void 1025 cdc_ncm_speed_change(struct usbnet *dev, 1026 struct usb_cdc_speed_change *data) 1027 { 1028 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); 1029 uint32_t tx_speed = le32_to_cpu(data->ULBitRate); 1030 1031 /* 1032 * Currently the USB-NET API does not support reporting the actual 1033 * device speed. Do print it instead. 1034 */ 1035 if ((tx_speed > 1000000) && (rx_speed > 1000000)) { 1036 netif_info(dev, link, dev->net, 1037 "%u mbit/s downlink %u mbit/s uplink\n", 1038 (unsigned int)(rx_speed / 1000000U), 1039 (unsigned int)(tx_speed / 1000000U)); 1040 } else { 1041 netif_info(dev, link, dev->net, 1042 "%u kbit/s downlink %u kbit/s uplink\n", 1043 (unsigned int)(rx_speed / 1000U), 1044 (unsigned int)(tx_speed / 1000U)); 1045 } 1046 } 1047 1048 static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) 1049 { 1050 struct cdc_ncm_ctx *ctx; 1051 struct usb_cdc_notification *event; 1052 1053 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1054 1055 if (urb->actual_length < sizeof(*event)) 1056 return; 1057 1058 /* test for split data in 8-byte chunks */ 1059 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { 1060 cdc_ncm_speed_change(dev, 1061 (struct usb_cdc_speed_change *)urb->transfer_buffer); 1062 return; 1063 } 1064 1065 event = urb->transfer_buffer; 1066 1067 switch (event->bNotificationType) { 1068 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 1069 /* 1070 * According to the CDC NCM specification ch.7.1 1071 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be 1072 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. 1073 */ 1074 ctx->connected = le16_to_cpu(event->wValue); 1075 netif_info(dev, link, dev->net, 1076 "network connection: %sconnected\n", 1077 ctx->connected ? "" : "dis"); 1078 usbnet_link_change(dev, ctx->connected, 0); 1079 break; 1080 1081 case USB_CDC_NOTIFY_SPEED_CHANGE: 1082 if (urb->actual_length < (sizeof(*event) + 1083 sizeof(struct usb_cdc_speed_change))) 1084 set_bit(EVENT_STS_SPLIT, &dev->flags); 1085 else 1086 cdc_ncm_speed_change(dev, 1087 (struct usb_cdc_speed_change *)&event[1]); 1088 break; 1089 1090 default: 1091 dev_dbg(&dev->udev->dev, 1092 "NCM: unexpected notification 0x%02x!\n", 1093 event->bNotificationType); 1094 break; 1095 } 1096 } 1097 1098 static int cdc_ncm_check_connect(struct usbnet *dev) 1099 { 1100 struct cdc_ncm_ctx *ctx; 1101 1102 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1103 if (ctx == NULL) 1104 return 1; /* disconnected */ 1105 1106 return !ctx->connected; 1107 } 1108 1109 static const struct driver_info cdc_ncm_info = { 1110 .description = "CDC NCM", 1111 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET, 1112 .bind = cdc_ncm_bind, 1113 .unbind = cdc_ncm_unbind, 1114 .check_connect = cdc_ncm_check_connect, 1115 .manage_power = usbnet_manage_power, 1116 .status = cdc_ncm_status, 1117 .rx_fixup = cdc_ncm_rx_fixup, 1118 .tx_fixup = cdc_ncm_tx_fixup, 1119 }; 1120 1121 /* Same as cdc_ncm_info, but with FLAG_WWAN */ 1122 static const struct driver_info wwan_info = { 1123 .description = "Mobile Broadband Network Device", 1124 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1125 | FLAG_WWAN, 1126 .bind = cdc_ncm_bind, 1127 .unbind = cdc_ncm_unbind, 1128 .check_connect = cdc_ncm_check_connect, 1129 .manage_power = usbnet_manage_power, 1130 .status = cdc_ncm_status, 1131 .rx_fixup = cdc_ncm_rx_fixup, 1132 .tx_fixup = cdc_ncm_tx_fixup, 1133 }; 1134 1135 /* Same as wwan_info, but with FLAG_NOARP */ 1136 static const struct driver_info wwan_noarp_info = { 1137 .description = "Mobile Broadband Network Device (NO ARP)", 1138 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1139 | FLAG_WWAN | FLAG_NOARP, 1140 .bind = cdc_ncm_bind, 1141 .unbind = cdc_ncm_unbind, 1142 .check_connect = cdc_ncm_check_connect, 1143 .manage_power = usbnet_manage_power, 1144 .status = cdc_ncm_status, 1145 .rx_fixup = cdc_ncm_rx_fixup, 1146 .tx_fixup = cdc_ncm_tx_fixup, 1147 }; 1148 1149 static const struct usb_device_id cdc_devs[] = { 1150 /* Ericsson MBM devices like F5521gw */ 1151 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1152 | USB_DEVICE_ID_MATCH_VENDOR, 1153 .idVendor = 0x0bdb, 1154 .bInterfaceClass = USB_CLASS_COMM, 1155 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1156 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1157 .driver_info = (unsigned long) &wwan_info, 1158 }, 1159 1160 /* Dell branded MBM devices like DW5550 */ 1161 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1162 | USB_DEVICE_ID_MATCH_VENDOR, 1163 .idVendor = 0x413c, 1164 .bInterfaceClass = USB_CLASS_COMM, 1165 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1166 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1167 .driver_info = (unsigned long) &wwan_info, 1168 }, 1169 1170 /* Toshiba branded MBM devices */ 1171 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1172 | USB_DEVICE_ID_MATCH_VENDOR, 1173 .idVendor = 0x0930, 1174 .bInterfaceClass = USB_CLASS_COMM, 1175 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1176 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1177 .driver_info = (unsigned long) &wwan_info, 1178 }, 1179 1180 /* tag Huawei devices as wwan */ 1181 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 1182 USB_CLASS_COMM, 1183 USB_CDC_SUBCLASS_NCM, 1184 USB_CDC_PROTO_NONE), 1185 .driver_info = (unsigned long)&wwan_info, 1186 }, 1187 1188 /* Infineon(now Intel) HSPA Modem platform */ 1189 { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, 1190 USB_CLASS_COMM, 1191 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1192 .driver_info = (unsigned long)&wwan_noarp_info, 1193 }, 1194 1195 /* Generic CDC-NCM devices */ 1196 { USB_INTERFACE_INFO(USB_CLASS_COMM, 1197 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1198 .driver_info = (unsigned long)&cdc_ncm_info, 1199 }, 1200 { 1201 }, 1202 }; 1203 MODULE_DEVICE_TABLE(usb, cdc_devs); 1204 1205 static struct usb_driver cdc_ncm_driver = { 1206 .name = "cdc_ncm", 1207 .id_table = cdc_devs, 1208 .probe = usbnet_probe, 1209 .disconnect = usbnet_disconnect, 1210 .suspend = usbnet_suspend, 1211 .resume = usbnet_resume, 1212 .reset_resume = usbnet_resume, 1213 .supports_autosuspend = 1, 1214 .disable_hub_initiated_lpm = 1, 1215 }; 1216 1217 module_usb_driver(cdc_ncm_driver); 1218 1219 MODULE_AUTHOR("Hans Petter Selasky"); 1220 MODULE_DESCRIPTION("USB CDC NCM host driver"); 1221 MODULE_LICENSE("Dual BSD/GPL"); 1222