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 #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM) 57 static bool prefer_mbim = true; 58 #else 59 static bool prefer_mbim; 60 #endif 61 module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR); 62 MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions"); 63 64 static void cdc_ncm_txpath_bh(unsigned long param); 65 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); 66 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); 67 static struct usb_driver cdc_ncm_driver; 68 69 static int cdc_ncm_setup(struct usbnet *dev) 70 { 71 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 72 struct usb_cdc_ncm_ntb_parameters ncm_parm; 73 u32 val; 74 u8 flags; 75 u8 iface_no; 76 int err; 77 int eth_hlen; 78 u16 ntb_fmt_supported; 79 __le16 max_datagram_size; 80 81 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 82 83 err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, 84 USB_TYPE_CLASS | USB_DIR_IN 85 |USB_RECIP_INTERFACE, 86 0, iface_no, &ncm_parm, 87 sizeof(ncm_parm)); 88 if (err < 0) { 89 dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n"); 90 return err; /* GET_NTB_PARAMETERS is required */ 91 } 92 93 /* read correct set of parameters according to device mode */ 94 ctx->rx_max = le32_to_cpu(ncm_parm.dwNtbInMaxSize); 95 ctx->tx_max = le32_to_cpu(ncm_parm.dwNtbOutMaxSize); 96 ctx->tx_remainder = le16_to_cpu(ncm_parm.wNdpOutPayloadRemainder); 97 ctx->tx_modulus = le16_to_cpu(ncm_parm.wNdpOutDivisor); 98 ctx->tx_ndp_modulus = le16_to_cpu(ncm_parm.wNdpOutAlignment); 99 /* devices prior to NCM Errata shall set this field to zero */ 100 ctx->tx_max_datagrams = le16_to_cpu(ncm_parm.wNtbOutMaxDatagrams); 101 ntb_fmt_supported = le16_to_cpu(ncm_parm.bmNtbFormatsSupported); 102 103 /* there are some minor differences in NCM and MBIM defaults */ 104 if (cdc_ncm_comm_intf_is_mbim(ctx->control->cur_altsetting)) { 105 if (!ctx->mbim_desc) 106 return -EINVAL; 107 eth_hlen = 0; 108 flags = ctx->mbim_desc->bmNetworkCapabilities; 109 ctx->max_datagram_size = le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); 110 if (ctx->max_datagram_size < CDC_MBIM_MIN_DATAGRAM_SIZE) 111 ctx->max_datagram_size = CDC_MBIM_MIN_DATAGRAM_SIZE; 112 } else { 113 if (!ctx->func_desc) 114 return -EINVAL; 115 eth_hlen = ETH_HLEN; 116 flags = ctx->func_desc->bmNetworkCapabilities; 117 ctx->max_datagram_size = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 118 if (ctx->max_datagram_size < CDC_NCM_MIN_DATAGRAM_SIZE) 119 ctx->max_datagram_size = CDC_NCM_MIN_DATAGRAM_SIZE; 120 } 121 122 /* common absolute max for NCM and MBIM */ 123 if (ctx->max_datagram_size > CDC_NCM_MAX_DATAGRAM_SIZE) 124 ctx->max_datagram_size = CDC_NCM_MAX_DATAGRAM_SIZE; 125 126 dev_dbg(&dev->intf->dev, 127 "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", 128 ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, 129 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, flags); 130 131 /* max count of tx datagrams */ 132 if ((ctx->tx_max_datagrams == 0) || 133 (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) 134 ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; 135 136 /* verify maximum size of received NTB in bytes */ 137 if (ctx->rx_max < USB_CDC_NCM_NTB_MIN_IN_SIZE) { 138 dev_dbg(&dev->intf->dev, "Using min receive length=%d\n", 139 USB_CDC_NCM_NTB_MIN_IN_SIZE); 140 ctx->rx_max = USB_CDC_NCM_NTB_MIN_IN_SIZE; 141 } 142 143 if (ctx->rx_max > CDC_NCM_NTB_MAX_SIZE_RX) { 144 dev_dbg(&dev->intf->dev, "Using default maximum receive length=%d\n", 145 CDC_NCM_NTB_MAX_SIZE_RX); 146 ctx->rx_max = CDC_NCM_NTB_MAX_SIZE_RX; 147 } 148 149 /* inform device about NTB input size changes */ 150 if (ctx->rx_max != le32_to_cpu(ncm_parm.dwNtbInMaxSize)) { 151 __le32 dwNtbInMaxSize = cpu_to_le32(ctx->rx_max); 152 153 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, 154 USB_TYPE_CLASS | USB_DIR_OUT 155 | USB_RECIP_INTERFACE, 156 0, iface_no, &dwNtbInMaxSize, 4); 157 if (err < 0) 158 dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n"); 159 } 160 161 /* verify maximum size of transmitted NTB in bytes */ 162 if (ctx->tx_max > CDC_NCM_NTB_MAX_SIZE_TX) { 163 dev_dbg(&dev->intf->dev, "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 /* Adding a pad byte here simplifies the handling in 168 * cdc_ncm_fill_tx_frame, by making tx_max always 169 * represent the real skb max size. 170 */ 171 if (ctx->tx_max % usb_maxpacket(dev->udev, dev->out, 1) == 0) 172 ctx->tx_max++; 173 174 } 175 176 /* 177 * verify that the structure alignment is: 178 * - power of two 179 * - not greater than the maximum transmit length 180 * - not less than four bytes 181 */ 182 val = ctx->tx_ndp_modulus; 183 184 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 185 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 186 dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n"); 187 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 188 } 189 190 /* 191 * verify that the payload alignment is: 192 * - power of two 193 * - not greater than the maximum transmit length 194 * - not less than four bytes 195 */ 196 val = ctx->tx_modulus; 197 198 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 199 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 200 dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n"); 201 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 202 } 203 204 /* verify the payload remainder */ 205 if (ctx->tx_remainder >= ctx->tx_modulus) { 206 dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n"); 207 ctx->tx_remainder = 0; 208 } 209 210 /* adjust TX-remainder according to NCM specification. */ 211 ctx->tx_remainder = ((ctx->tx_remainder - eth_hlen) & 212 (ctx->tx_modulus - 1)); 213 214 /* additional configuration */ 215 216 /* set CRC Mode */ 217 if (flags & USB_CDC_NCM_NCAP_CRC_MODE) { 218 err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, 219 USB_TYPE_CLASS | USB_DIR_OUT 220 | USB_RECIP_INTERFACE, 221 USB_CDC_NCM_CRC_NOT_APPENDED, 222 iface_no, NULL, 0); 223 if (err < 0) 224 dev_dbg(&dev->intf->dev, "Setting CRC mode off failed\n"); 225 } 226 227 /* set NTB format, if both formats are supported */ 228 if (ntb_fmt_supported & USB_CDC_NCM_NTH32_SIGN) { 229 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, 230 USB_TYPE_CLASS | USB_DIR_OUT 231 | USB_RECIP_INTERFACE, 232 USB_CDC_NCM_NTB16_FORMAT, 233 iface_no, NULL, 0); 234 if (err < 0) 235 dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit failed\n"); 236 } 237 238 /* inform the device about the selected Max Datagram Size */ 239 if (!(flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE)) 240 goto out; 241 242 /* read current mtu value from device */ 243 err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, 244 USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE, 245 0, iface_no, &max_datagram_size, 2); 246 if (err < 0) { 247 dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n"); 248 goto out; 249 } 250 251 if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size) 252 goto out; 253 254 max_datagram_size = cpu_to_le16(ctx->max_datagram_size); 255 err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE, 256 USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE, 257 0, iface_no, &max_datagram_size, 2); 258 if (err < 0) 259 dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n"); 260 261 out: 262 /* set MTU to max supported by the device if necessary */ 263 if (dev->net->mtu > ctx->max_datagram_size - eth_hlen) 264 dev->net->mtu = ctx->max_datagram_size - eth_hlen; 265 return 0; 266 } 267 268 static void 269 cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf) 270 { 271 struct usb_host_endpoint *e, *in = NULL, *out = NULL; 272 u8 ep; 273 274 for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { 275 276 e = intf->cur_altsetting->endpoint + ep; 277 switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 278 case USB_ENDPOINT_XFER_INT: 279 if (usb_endpoint_dir_in(&e->desc)) { 280 if (!dev->status) 281 dev->status = e; 282 } 283 break; 284 285 case USB_ENDPOINT_XFER_BULK: 286 if (usb_endpoint_dir_in(&e->desc)) { 287 if (!in) 288 in = e; 289 } else { 290 if (!out) 291 out = e; 292 } 293 break; 294 295 default: 296 break; 297 } 298 } 299 if (in && !dev->in) 300 dev->in = usb_rcvbulkpipe(dev->udev, 301 in->desc.bEndpointAddress & 302 USB_ENDPOINT_NUMBER_MASK); 303 if (out && !dev->out) 304 dev->out = usb_sndbulkpipe(dev->udev, 305 out->desc.bEndpointAddress & 306 USB_ENDPOINT_NUMBER_MASK); 307 } 308 309 static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) 310 { 311 if (ctx == NULL) 312 return; 313 314 if (ctx->tx_rem_skb != NULL) { 315 dev_kfree_skb_any(ctx->tx_rem_skb); 316 ctx->tx_rem_skb = NULL; 317 } 318 319 if (ctx->tx_curr_skb != NULL) { 320 dev_kfree_skb_any(ctx->tx_curr_skb); 321 ctx->tx_curr_skb = NULL; 322 } 323 324 kfree(ctx); 325 } 326 327 int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting) 328 { 329 const struct usb_cdc_union_desc *union_desc = NULL; 330 struct cdc_ncm_ctx *ctx; 331 struct usb_driver *driver; 332 u8 *buf; 333 int len; 334 int temp; 335 u8 iface_no; 336 337 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 338 if (!ctx) 339 return -ENOMEM; 340 341 hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 342 ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; 343 ctx->bh.data = (unsigned long)dev; 344 ctx->bh.func = cdc_ncm_txpath_bh; 345 atomic_set(&ctx->stop, 0); 346 spin_lock_init(&ctx->mtx); 347 348 /* store ctx pointer in device data field */ 349 dev->data[0] = (unsigned long)ctx; 350 351 /* only the control interface can be successfully probed */ 352 ctx->control = intf; 353 354 /* get some pointers */ 355 driver = driver_of(intf); 356 buf = intf->cur_altsetting->extra; 357 len = intf->cur_altsetting->extralen; 358 359 /* parse through descriptors associated with control interface */ 360 while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) { 361 362 if (buf[1] != USB_DT_CS_INTERFACE) 363 goto advance; 364 365 switch (buf[2]) { 366 case USB_CDC_UNION_TYPE: 367 if (buf[0] < sizeof(*union_desc)) 368 break; 369 370 union_desc = (const struct usb_cdc_union_desc *)buf; 371 /* the master must be the interface we are probing */ 372 if (intf->cur_altsetting->desc.bInterfaceNumber != 373 union_desc->bMasterInterface0) { 374 dev_dbg(&intf->dev, "bogus CDC Union\n"); 375 goto error; 376 } 377 ctx->data = usb_ifnum_to_if(dev->udev, 378 union_desc->bSlaveInterface0); 379 break; 380 381 case USB_CDC_ETHERNET_TYPE: 382 if (buf[0] < sizeof(*(ctx->ether_desc))) 383 break; 384 385 ctx->ether_desc = 386 (const struct usb_cdc_ether_desc *)buf; 387 break; 388 389 case USB_CDC_NCM_TYPE: 390 if (buf[0] < sizeof(*(ctx->func_desc))) 391 break; 392 393 ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf; 394 break; 395 396 case USB_CDC_MBIM_TYPE: 397 if (buf[0] < sizeof(*(ctx->mbim_desc))) 398 break; 399 400 ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf; 401 break; 402 403 default: 404 break; 405 } 406 advance: 407 /* advance to next descriptor */ 408 temp = buf[0]; 409 buf += temp; 410 len -= temp; 411 } 412 413 /* some buggy devices have an IAD but no CDC Union */ 414 if (!union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) { 415 ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1); 416 dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n"); 417 } 418 419 /* check if we got everything */ 420 if (!ctx->data || (!ctx->mbim_desc && !ctx->ether_desc)) { 421 dev_dbg(&intf->dev, "CDC descriptors missing\n"); 422 goto error; 423 } 424 425 /* claim data interface, if different from control */ 426 if (ctx->data != ctx->control) { 427 temp = usb_driver_claim_interface(driver, ctx->data, dev); 428 if (temp) { 429 dev_dbg(&intf->dev, "failed to claim data intf\n"); 430 goto error; 431 } 432 } 433 434 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; 435 436 /* reset data interface */ 437 temp = usb_set_interface(dev->udev, iface_no, 0); 438 if (temp) { 439 dev_dbg(&intf->dev, "set interface failed\n"); 440 goto error2; 441 } 442 443 /* configure data interface */ 444 temp = usb_set_interface(dev->udev, iface_no, data_altsetting); 445 if (temp) { 446 dev_dbg(&intf->dev, "set interface failed\n"); 447 goto error2; 448 } 449 450 cdc_ncm_find_endpoints(dev, ctx->data); 451 cdc_ncm_find_endpoints(dev, ctx->control); 452 if (!dev->in || !dev->out || !dev->status) { 453 dev_dbg(&intf->dev, "failed to collect endpoints\n"); 454 goto error2; 455 } 456 457 /* initialize data interface */ 458 if (cdc_ncm_setup(dev)) { 459 dev_dbg(&intf->dev, "cdc_ncm_setup() failed\n"); 460 goto error2; 461 } 462 463 usb_set_intfdata(ctx->data, dev); 464 usb_set_intfdata(ctx->control, dev); 465 466 if (ctx->ether_desc) { 467 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); 468 if (temp) { 469 dev_dbg(&intf->dev, "failed to get mac address\n"); 470 goto error2; 471 } 472 dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr); 473 } 474 475 /* usbnet use these values for sizing tx/rx queues */ 476 dev->hard_mtu = ctx->tx_max; 477 dev->rx_urb_size = ctx->rx_max; 478 479 return 0; 480 481 error2: 482 usb_set_intfdata(ctx->control, NULL); 483 usb_set_intfdata(ctx->data, NULL); 484 if (ctx->data != ctx->control) 485 usb_driver_release_interface(driver, ctx->data); 486 error: 487 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); 488 dev->data[0] = 0; 489 dev_info(&intf->dev, "bind() failure\n"); 490 return -ENODEV; 491 } 492 EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); 493 494 void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) 495 { 496 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 497 struct usb_driver *driver = driver_of(intf); 498 499 if (ctx == NULL) 500 return; /* no setup */ 501 502 atomic_set(&ctx->stop, 1); 503 504 if (hrtimer_active(&ctx->tx_timer)) 505 hrtimer_cancel(&ctx->tx_timer); 506 507 tasklet_kill(&ctx->bh); 508 509 /* handle devices with combined control and data interface */ 510 if (ctx->control == ctx->data) 511 ctx->data = NULL; 512 513 /* disconnect master --> disconnect slave */ 514 if (intf == ctx->control && ctx->data) { 515 usb_set_intfdata(ctx->data, NULL); 516 usb_driver_release_interface(driver, ctx->data); 517 ctx->data = NULL; 518 519 } else if (intf == ctx->data && ctx->control) { 520 usb_set_intfdata(ctx->control, NULL); 521 usb_driver_release_interface(driver, ctx->control); 522 ctx->control = NULL; 523 } 524 525 usb_set_intfdata(intf, NULL); 526 cdc_ncm_free(ctx); 527 } 528 EXPORT_SYMBOL_GPL(cdc_ncm_unbind); 529 530 /* Select the MBIM altsetting iff it is preferred and available, 531 * returning the number of the corresponding data interface altsetting 532 */ 533 u8 cdc_ncm_select_altsetting(struct usbnet *dev, struct usb_interface *intf) 534 { 535 struct usb_host_interface *alt; 536 537 /* The MBIM spec defines a NCM compatible default altsetting, 538 * which we may have matched: 539 * 540 * "Functions that implement both NCM 1.0 and MBIM (an 541 * “NCM/MBIM function”) according to this recommendation 542 * shall provide two alternate settings for the 543 * Communication Interface. Alternate setting 0, and the 544 * associated class and endpoint descriptors, shall be 545 * constructed according to the rules given for the 546 * Communication Interface in section 5 of [USBNCM10]. 547 * Alternate setting 1, and the associated class and 548 * endpoint descriptors, shall be constructed according to 549 * the rules given in section 6 (USB Device Model) of this 550 * specification." 551 */ 552 if (prefer_mbim && intf->num_altsetting == 2) { 553 alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); 554 if (alt && cdc_ncm_comm_intf_is_mbim(alt) && 555 !usb_set_interface(dev->udev, 556 intf->cur_altsetting->desc.bInterfaceNumber, 557 CDC_NCM_COMM_ALTSETTING_MBIM)) 558 return CDC_NCM_DATA_ALTSETTING_MBIM; 559 } 560 return CDC_NCM_DATA_ALTSETTING_NCM; 561 } 562 EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); 563 564 static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) 565 { 566 int ret; 567 568 /* MBIM backwards compatible function? */ 569 cdc_ncm_select_altsetting(dev, intf); 570 if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) 571 return -ENODEV; 572 573 /* NCM data altsetting is always 1 */ 574 ret = cdc_ncm_bind_common(dev, intf, 1); 575 576 /* 577 * We should get an event when network connection is "connected" or 578 * "disconnected". Set network connection in "disconnected" state 579 * (carrier is OFF) during attach, so the IP network stack does not 580 * start IPv6 negotiation and more. 581 */ 582 usbnet_link_change(dev, 0, 0); 583 return ret; 584 } 585 586 static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) 587 { 588 size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; 589 590 if (skb->len + align > max) 591 align = max - skb->len; 592 if (align && skb_tailroom(skb) >= align) 593 memset(skb_put(skb, align), 0, align); 594 } 595 596 /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly 597 * allocating a new one within skb 598 */ 599 static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) 600 { 601 struct usb_cdc_ncm_ndp16 *ndp16 = NULL; 602 struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; 603 size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); 604 605 /* follow the chain of NDPs, looking for a match */ 606 while (ndpoffset) { 607 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); 608 if (ndp16->dwSignature == sign) 609 return ndp16; 610 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 611 } 612 613 /* align new NDP */ 614 cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max); 615 616 /* verify that there is room for the NDP and the datagram (reserve) */ 617 if ((ctx->tx_max - skb->len - reserve) < CDC_NCM_NDP_SIZE) 618 return NULL; 619 620 /* link to it */ 621 if (ndp16) 622 ndp16->wNextNdpIndex = cpu_to_le16(skb->len); 623 else 624 nth16->wNdpIndex = cpu_to_le16(skb->len); 625 626 /* push a new empty NDP */ 627 ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, CDC_NCM_NDP_SIZE), 0, CDC_NCM_NDP_SIZE); 628 ndp16->dwSignature = sign; 629 ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); 630 return ndp16; 631 } 632 633 struct sk_buff * 634 cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign) 635 { 636 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 637 struct usb_cdc_ncm_nth16 *nth16; 638 struct usb_cdc_ncm_ndp16 *ndp16; 639 struct sk_buff *skb_out; 640 u16 n = 0, index, ndplen; 641 u8 ready2send = 0; 642 643 /* if there is a remaining skb, it gets priority */ 644 if (skb != NULL) { 645 swap(skb, ctx->tx_rem_skb); 646 swap(sign, ctx->tx_rem_sign); 647 } else { 648 ready2send = 1; 649 } 650 651 /* check if we are resuming an OUT skb */ 652 skb_out = ctx->tx_curr_skb; 653 654 /* allocate a new OUT skb */ 655 if (!skb_out) { 656 skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC); 657 if (skb_out == NULL) { 658 if (skb != NULL) { 659 dev_kfree_skb_any(skb); 660 dev->net->stats.tx_dropped++; 661 } 662 goto exit_no_skb; 663 } 664 /* fill out the initial 16-bit NTB header */ 665 nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16)); 666 nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); 667 nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); 668 nth16->wSequence = cpu_to_le16(ctx->tx_seq++); 669 670 /* count total number of frames in this NTB */ 671 ctx->tx_curr_frame_num = 0; 672 } 673 674 for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { 675 /* send any remaining skb first */ 676 if (skb == NULL) { 677 skb = ctx->tx_rem_skb; 678 sign = ctx->tx_rem_sign; 679 ctx->tx_rem_skb = NULL; 680 681 /* check for end of skb */ 682 if (skb == NULL) 683 break; 684 } 685 686 /* get the appropriate NDP for this skb */ 687 ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); 688 689 /* align beginning of next frame */ 690 cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max); 691 692 /* check if we had enough room left for both NDP and frame */ 693 if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) { 694 if (n == 0) { 695 /* won't fit, MTU problem? */ 696 dev_kfree_skb_any(skb); 697 skb = NULL; 698 dev->net->stats.tx_dropped++; 699 } else { 700 /* no room for skb - store for later */ 701 if (ctx->tx_rem_skb != NULL) { 702 dev_kfree_skb_any(ctx->tx_rem_skb); 703 dev->net->stats.tx_dropped++; 704 } 705 ctx->tx_rem_skb = skb; 706 ctx->tx_rem_sign = sign; 707 skb = NULL; 708 ready2send = 1; 709 } 710 break; 711 } 712 713 /* calculate frame number withing this NDP */ 714 ndplen = le16_to_cpu(ndp16->wLength); 715 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; 716 717 /* OK, add this skb */ 718 ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); 719 ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); 720 ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); 721 memcpy(skb_put(skb_out, skb->len), skb->data, skb->len); 722 dev_kfree_skb_any(skb); 723 skb = NULL; 724 725 /* send now if this NDP is full */ 726 if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { 727 ready2send = 1; 728 break; 729 } 730 } 731 732 /* free up any dangling skb */ 733 if (skb != NULL) { 734 dev_kfree_skb_any(skb); 735 skb = NULL; 736 dev->net->stats.tx_dropped++; 737 } 738 739 ctx->tx_curr_frame_num = n; 740 741 if (n == 0) { 742 /* wait for more frames */ 743 /* push variables */ 744 ctx->tx_curr_skb = skb_out; 745 goto exit_no_skb; 746 747 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) { 748 /* wait for more frames */ 749 /* push variables */ 750 ctx->tx_curr_skb = skb_out; 751 /* set the pending count */ 752 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) 753 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; 754 goto exit_no_skb; 755 756 } else { 757 /* frame goes out */ 758 /* variables will be reset at next call */ 759 } 760 761 /* If collected data size is less or equal CDC_NCM_MIN_TX_PKT 762 * bytes, we send buffers as it is. If we get more data, it 763 * would be more efficient for USB HS mobile device with DMA 764 * engine to receive a full size NTB, than canceling DMA 765 * transfer and receiving a short packet. 766 * 767 * This optimization support is pointless if we end up sending 768 * a ZLP after full sized NTBs. 769 */ 770 if (!(dev->driver_info->flags & FLAG_SEND_ZLP) && 771 skb_out->len > CDC_NCM_MIN_TX_PKT) 772 memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0, 773 ctx->tx_max - skb_out->len); 774 else if ((skb_out->len % dev->maxpacket) == 0) 775 *skb_put(skb_out, 1) = 0; /* force short packet */ 776 777 /* set final frame length */ 778 nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 779 nth16->wBlockLength = cpu_to_le16(skb_out->len); 780 781 /* return skb */ 782 ctx->tx_curr_skb = NULL; 783 dev->net->stats.tx_packets += ctx->tx_curr_frame_num; 784 return skb_out; 785 786 exit_no_skb: 787 /* Start timer, if there is a remaining skb */ 788 if (ctx->tx_curr_skb != NULL) 789 cdc_ncm_tx_timeout_start(ctx); 790 return NULL; 791 } 792 EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); 793 794 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) 795 { 796 /* start timer, if not already started */ 797 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) 798 hrtimer_start(&ctx->tx_timer, 799 ktime_set(0, CDC_NCM_TIMER_INTERVAL), 800 HRTIMER_MODE_REL); 801 } 802 803 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) 804 { 805 struct cdc_ncm_ctx *ctx = 806 container_of(timer, struct cdc_ncm_ctx, tx_timer); 807 808 if (!atomic_read(&ctx->stop)) 809 tasklet_schedule(&ctx->bh); 810 return HRTIMER_NORESTART; 811 } 812 813 static void cdc_ncm_txpath_bh(unsigned long param) 814 { 815 struct usbnet *dev = (struct usbnet *)param; 816 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 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 (dev->net != NULL) { 824 spin_unlock_bh(&ctx->mtx); 825 netif_tx_lock_bh(dev->net); 826 usbnet_start_xmit(NULL, dev->net); 827 netif_tx_unlock_bh(dev->net); 828 } else { 829 spin_unlock_bh(&ctx->mtx); 830 } 831 } 832 833 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(dev, 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 EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup); 861 862 /* verify NTB header and return offset of first NDP, or negative error */ 863 int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) 864 { 865 struct usbnet *dev = netdev_priv(skb_in->dev); 866 struct usb_cdc_ncm_nth16 *nth16; 867 int len; 868 int ret = -EINVAL; 869 870 if (ctx == NULL) 871 goto error; 872 873 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + 874 sizeof(struct usb_cdc_ncm_ndp16))) { 875 netif_dbg(dev, rx_err, dev->net, "frame too short\n"); 876 goto error; 877 } 878 879 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; 880 881 if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) { 882 netif_dbg(dev, rx_err, dev->net, 883 "invalid NTH16 signature <%#010x>\n", 884 le32_to_cpu(nth16->dwSignature)); 885 goto error; 886 } 887 888 len = le16_to_cpu(nth16->wBlockLength); 889 if (len > ctx->rx_max) { 890 netif_dbg(dev, rx_err, dev->net, 891 "unsupported NTB block length %u/%u\n", len, 892 ctx->rx_max); 893 goto error; 894 } 895 896 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && 897 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && 898 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { 899 netif_dbg(dev, rx_err, dev->net, 900 "sequence number glitch prev=%d curr=%d\n", 901 ctx->rx_seq, le16_to_cpu(nth16->wSequence)); 902 } 903 ctx->rx_seq = le16_to_cpu(nth16->wSequence); 904 905 ret = le16_to_cpu(nth16->wNdpIndex); 906 error: 907 return ret; 908 } 909 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); 910 911 /* verify NDP header and return number of datagrams, or negative error */ 912 int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) 913 { 914 struct usbnet *dev = netdev_priv(skb_in->dev); 915 struct usb_cdc_ncm_ndp16 *ndp16; 916 int ret = -EINVAL; 917 918 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { 919 netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", 920 ndpoffset); 921 goto error; 922 } 923 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 924 925 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { 926 netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n", 927 le16_to_cpu(ndp16->wLength)); 928 goto error; 929 } 930 931 ret = ((le16_to_cpu(ndp16->wLength) - 932 sizeof(struct usb_cdc_ncm_ndp16)) / 933 sizeof(struct usb_cdc_ncm_dpe16)); 934 ret--; /* we process NDP entries except for the last one */ 935 936 if ((sizeof(struct usb_cdc_ncm_ndp16) + 937 ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) { 938 netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); 939 ret = -EINVAL; 940 } 941 942 error: 943 return ret; 944 } 945 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); 946 947 int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) 948 { 949 struct sk_buff *skb; 950 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 951 int len; 952 int nframes; 953 int x; 954 int offset; 955 struct usb_cdc_ncm_ndp16 *ndp16; 956 struct usb_cdc_ncm_dpe16 *dpe16; 957 int ndpoffset; 958 int loopcount = 50; /* arbitrary max preventing infinite loop */ 959 960 ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); 961 if (ndpoffset < 0) 962 goto error; 963 964 next_ndp: 965 nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); 966 if (nframes < 0) 967 goto error; 968 969 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 970 971 if (ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) { 972 netif_dbg(dev, rx_err, dev->net, 973 "invalid DPT16 signature <%#010x>\n", 974 le32_to_cpu(ndp16->dwSignature)); 975 goto err_ndp; 976 } 977 dpe16 = ndp16->dpe16; 978 979 for (x = 0; x < nframes; x++, dpe16++) { 980 offset = le16_to_cpu(dpe16->wDatagramIndex); 981 len = le16_to_cpu(dpe16->wDatagramLength); 982 983 /* 984 * CDC NCM ch. 3.7 985 * All entries after first NULL entry are to be ignored 986 */ 987 if ((offset == 0) || (len == 0)) { 988 if (!x) 989 goto err_ndp; /* empty NTB */ 990 break; 991 } 992 993 /* sanity checking */ 994 if (((offset + len) > skb_in->len) || 995 (len > ctx->rx_max) || (len < ETH_HLEN)) { 996 netif_dbg(dev, rx_err, dev->net, 997 "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n", 998 x, offset, len, skb_in); 999 if (!x) 1000 goto err_ndp; 1001 break; 1002 1003 } else { 1004 skb = skb_clone(skb_in, GFP_ATOMIC); 1005 if (!skb) 1006 goto error; 1007 skb->len = len; 1008 skb->data = ((u8 *)skb_in->data) + offset; 1009 skb_set_tail_pointer(skb, len); 1010 usbnet_skb_return(dev, skb); 1011 } 1012 } 1013 err_ndp: 1014 /* are there more NDPs to process? */ 1015 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 1016 if (ndpoffset && loopcount--) 1017 goto next_ndp; 1018 1019 return 1; 1020 error: 1021 return 0; 1022 } 1023 EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup); 1024 1025 static void 1026 cdc_ncm_speed_change(struct usbnet *dev, 1027 struct usb_cdc_speed_change *data) 1028 { 1029 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); 1030 uint32_t tx_speed = le32_to_cpu(data->ULBitRate); 1031 1032 /* 1033 * Currently the USB-NET API does not support reporting the actual 1034 * device speed. Do print it instead. 1035 */ 1036 if ((tx_speed > 1000000) && (rx_speed > 1000000)) { 1037 netif_info(dev, link, dev->net, 1038 "%u mbit/s downlink %u mbit/s uplink\n", 1039 (unsigned int)(rx_speed / 1000000U), 1040 (unsigned int)(tx_speed / 1000000U)); 1041 } else { 1042 netif_info(dev, link, dev->net, 1043 "%u kbit/s downlink %u kbit/s uplink\n", 1044 (unsigned int)(rx_speed / 1000U), 1045 (unsigned int)(tx_speed / 1000U)); 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(dev, 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 netif_info(dev, link, dev->net, 1077 "network connection: %sconnected\n", 1078 ctx->connected ? "" : "dis"); 1079 usbnet_link_change(dev, ctx->connected, 0); 1080 break; 1081 1082 case USB_CDC_NOTIFY_SPEED_CHANGE: 1083 if (urb->actual_length < (sizeof(*event) + 1084 sizeof(struct usb_cdc_speed_change))) 1085 set_bit(EVENT_STS_SPLIT, &dev->flags); 1086 else 1087 cdc_ncm_speed_change(dev, 1088 (struct usb_cdc_speed_change *)&event[1]); 1089 break; 1090 1091 default: 1092 dev_dbg(&dev->udev->dev, 1093 "NCM: unexpected notification 0x%02x!\n", 1094 event->bNotificationType); 1095 break; 1096 } 1097 } 1098 1099 static int cdc_ncm_check_connect(struct usbnet *dev) 1100 { 1101 struct cdc_ncm_ctx *ctx; 1102 1103 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1104 if (ctx == NULL) 1105 return 1; /* disconnected */ 1106 1107 return !ctx->connected; 1108 } 1109 1110 static const struct driver_info cdc_ncm_info = { 1111 .description = "CDC NCM", 1112 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET, 1113 .bind = cdc_ncm_bind, 1114 .unbind = cdc_ncm_unbind, 1115 .check_connect = cdc_ncm_check_connect, 1116 .manage_power = usbnet_manage_power, 1117 .status = cdc_ncm_status, 1118 .rx_fixup = cdc_ncm_rx_fixup, 1119 .tx_fixup = cdc_ncm_tx_fixup, 1120 }; 1121 1122 /* Same as cdc_ncm_info, but with FLAG_WWAN */ 1123 static const struct driver_info wwan_info = { 1124 .description = "Mobile Broadband Network Device", 1125 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1126 | FLAG_WWAN, 1127 .bind = cdc_ncm_bind, 1128 .unbind = cdc_ncm_unbind, 1129 .check_connect = cdc_ncm_check_connect, 1130 .manage_power = usbnet_manage_power, 1131 .status = cdc_ncm_status, 1132 .rx_fixup = cdc_ncm_rx_fixup, 1133 .tx_fixup = cdc_ncm_tx_fixup, 1134 }; 1135 1136 /* Same as wwan_info, but with FLAG_NOARP */ 1137 static const struct driver_info wwan_noarp_info = { 1138 .description = "Mobile Broadband Network Device (NO ARP)", 1139 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1140 | FLAG_WWAN | FLAG_NOARP, 1141 .bind = cdc_ncm_bind, 1142 .unbind = cdc_ncm_unbind, 1143 .check_connect = cdc_ncm_check_connect, 1144 .manage_power = usbnet_manage_power, 1145 .status = cdc_ncm_status, 1146 .rx_fixup = cdc_ncm_rx_fixup, 1147 .tx_fixup = cdc_ncm_tx_fixup, 1148 }; 1149 1150 static const struct usb_device_id cdc_devs[] = { 1151 /* Ericsson MBM devices like F5521gw */ 1152 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1153 | USB_DEVICE_ID_MATCH_VENDOR, 1154 .idVendor = 0x0bdb, 1155 .bInterfaceClass = USB_CLASS_COMM, 1156 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1157 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1158 .driver_info = (unsigned long) &wwan_info, 1159 }, 1160 1161 /* Dell branded MBM devices like DW5550 */ 1162 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1163 | USB_DEVICE_ID_MATCH_VENDOR, 1164 .idVendor = 0x413c, 1165 .bInterfaceClass = USB_CLASS_COMM, 1166 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1167 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1168 .driver_info = (unsigned long) &wwan_info, 1169 }, 1170 1171 /* Toshiba branded MBM devices */ 1172 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1173 | USB_DEVICE_ID_MATCH_VENDOR, 1174 .idVendor = 0x0930, 1175 .bInterfaceClass = USB_CLASS_COMM, 1176 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1177 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1178 .driver_info = (unsigned long) &wwan_info, 1179 }, 1180 1181 /* tag Huawei devices as wwan */ 1182 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 1183 USB_CLASS_COMM, 1184 USB_CDC_SUBCLASS_NCM, 1185 USB_CDC_PROTO_NONE), 1186 .driver_info = (unsigned long)&wwan_info, 1187 }, 1188 1189 /* Infineon(now Intel) HSPA Modem platform */ 1190 { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, 1191 USB_CLASS_COMM, 1192 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1193 .driver_info = (unsigned long)&wwan_noarp_info, 1194 }, 1195 1196 /* Generic CDC-NCM devices */ 1197 { USB_INTERFACE_INFO(USB_CLASS_COMM, 1198 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1199 .driver_info = (unsigned long)&cdc_ncm_info, 1200 }, 1201 { 1202 }, 1203 }; 1204 MODULE_DEVICE_TABLE(usb, cdc_devs); 1205 1206 static struct usb_driver cdc_ncm_driver = { 1207 .name = "cdc_ncm", 1208 .id_table = cdc_devs, 1209 .probe = usbnet_probe, 1210 .disconnect = usbnet_disconnect, 1211 .suspend = usbnet_suspend, 1212 .resume = usbnet_resume, 1213 .reset_resume = usbnet_resume, 1214 .supports_autosuspend = 1, 1215 .disable_hub_initiated_lpm = 1, 1216 }; 1217 1218 module_usb_driver(cdc_ncm_driver); 1219 1220 MODULE_AUTHOR("Hans Petter Selasky"); 1221 MODULE_DESCRIPTION("USB CDC NCM host driver"); 1222 MODULE_LICENSE("Dual BSD/GPL"); 1223