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 u32 val; 72 u8 flags; 73 u8 iface_no; 74 int err; 75 int eth_hlen; 76 u16 mbim_mtu; 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, &ctx->ncm_parm, 86 sizeof(ctx->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(ctx->ncm_parm.dwNtbInMaxSize); 94 ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); 95 ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); 96 ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); 97 ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); 98 /* devices prior to NCM Errata shall set this field to zero */ 99 ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); 100 ntb_fmt_supported = le16_to_cpu(ctx->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(ctx->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 } 166 167 /* 168 * verify that the structure alignment is: 169 * - power of two 170 * - not greater than the maximum transmit length 171 * - not less than four bytes 172 */ 173 val = ctx->tx_ndp_modulus; 174 175 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 176 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 177 dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n"); 178 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 179 } 180 181 /* 182 * verify that the payload alignment is: 183 * - power of two 184 * - not greater than the maximum transmit length 185 * - not less than four bytes 186 */ 187 val = ctx->tx_modulus; 188 189 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 190 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 191 dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n"); 192 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 193 } 194 195 /* verify the payload remainder */ 196 if (ctx->tx_remainder >= ctx->tx_modulus) { 197 dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n"); 198 ctx->tx_remainder = 0; 199 } 200 201 /* adjust TX-remainder according to NCM specification. */ 202 ctx->tx_remainder = ((ctx->tx_remainder - eth_hlen) & 203 (ctx->tx_modulus - 1)); 204 205 /* additional configuration */ 206 207 /* set CRC Mode */ 208 if (flags & USB_CDC_NCM_NCAP_CRC_MODE) { 209 err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, 210 USB_TYPE_CLASS | USB_DIR_OUT 211 | USB_RECIP_INTERFACE, 212 USB_CDC_NCM_CRC_NOT_APPENDED, 213 iface_no, NULL, 0); 214 if (err < 0) 215 dev_dbg(&dev->intf->dev, "Setting CRC mode off failed\n"); 216 } 217 218 /* set NTB format, if both formats are supported */ 219 if (ntb_fmt_supported & USB_CDC_NCM_NTH32_SIGN) { 220 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, 221 USB_TYPE_CLASS | USB_DIR_OUT 222 | USB_RECIP_INTERFACE, 223 USB_CDC_NCM_NTB16_FORMAT, 224 iface_no, NULL, 0); 225 if (err < 0) 226 dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit failed\n"); 227 } 228 229 /* inform the device about the selected Max Datagram Size */ 230 if (!(flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE)) 231 goto out; 232 233 /* read current mtu value from device */ 234 err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, 235 USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE, 236 0, iface_no, &max_datagram_size, 2); 237 if (err < 0) { 238 dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n"); 239 goto out; 240 } 241 242 if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size) 243 goto out; 244 245 max_datagram_size = cpu_to_le16(ctx->max_datagram_size); 246 err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE, 247 USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE, 248 0, iface_no, &max_datagram_size, 2); 249 if (err < 0) 250 dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n"); 251 252 out: 253 /* set MTU to max supported by the device if necessary */ 254 if (dev->net->mtu > ctx->max_datagram_size - eth_hlen) 255 dev->net->mtu = ctx->max_datagram_size - eth_hlen; 256 257 /* do not exceed operater preferred MTU */ 258 if (ctx->mbim_extended_desc) { 259 mbim_mtu = le16_to_cpu(ctx->mbim_extended_desc->wMTU); 260 if (mbim_mtu != 0 && mbim_mtu < dev->net->mtu) 261 dev->net->mtu = mbim_mtu; 262 } 263 264 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 case USB_CDC_MBIM_EXTENDED_TYPE: 403 if (buf[0] < sizeof(*(ctx->mbim_extended_desc))) 404 break; 405 406 ctx->mbim_extended_desc = 407 (const struct usb_cdc_mbim_extended_desc *)buf; 408 break; 409 410 default: 411 break; 412 } 413 advance: 414 /* advance to next descriptor */ 415 temp = buf[0]; 416 buf += temp; 417 len -= temp; 418 } 419 420 /* some buggy devices have an IAD but no CDC Union */ 421 if (!union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) { 422 ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1); 423 dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n"); 424 } 425 426 /* check if we got everything */ 427 if (!ctx->data || (!ctx->mbim_desc && !ctx->ether_desc)) { 428 dev_dbg(&intf->dev, "CDC descriptors missing\n"); 429 goto error; 430 } 431 432 /* claim data interface, if different from control */ 433 if (ctx->data != ctx->control) { 434 temp = usb_driver_claim_interface(driver, ctx->data, dev); 435 if (temp) { 436 dev_dbg(&intf->dev, "failed to claim data intf\n"); 437 goto error; 438 } 439 } 440 441 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; 442 443 /* reset data interface */ 444 temp = usb_set_interface(dev->udev, iface_no, 0); 445 if (temp) { 446 dev_dbg(&intf->dev, "set interface failed\n"); 447 goto error2; 448 } 449 450 /* initialize data interface */ 451 if (cdc_ncm_setup(dev)) 452 goto error2; 453 454 /* configure data interface */ 455 temp = usb_set_interface(dev->udev, iface_no, data_altsetting); 456 if (temp) { 457 dev_dbg(&intf->dev, "set interface failed\n"); 458 goto error2; 459 } 460 461 cdc_ncm_find_endpoints(dev, ctx->data); 462 cdc_ncm_find_endpoints(dev, ctx->control); 463 if (!dev->in || !dev->out || !dev->status) { 464 dev_dbg(&intf->dev, "failed to collect endpoints\n"); 465 goto error2; 466 } 467 468 usb_set_intfdata(ctx->data, dev); 469 usb_set_intfdata(ctx->control, dev); 470 471 if (ctx->ether_desc) { 472 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); 473 if (temp) { 474 dev_dbg(&intf->dev, "failed to get mac address\n"); 475 goto error2; 476 } 477 dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr); 478 } 479 480 /* usbnet use these values for sizing tx/rx queues */ 481 dev->hard_mtu = ctx->tx_max; 482 dev->rx_urb_size = ctx->rx_max; 483 484 /* cdc_ncm_setup will override dwNtbOutMaxSize if it is 485 * outside the sane range. Adding a pad byte here if necessary 486 * simplifies the handling in cdc_ncm_fill_tx_frame, making 487 * tx_max always represent the real skb max size. 488 */ 489 if (ctx->tx_max != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) && 490 ctx->tx_max % usb_maxpacket(dev->udev, dev->out, 1) == 0) 491 ctx->tx_max++; 492 493 return 0; 494 495 error2: 496 usb_set_intfdata(ctx->control, NULL); 497 usb_set_intfdata(ctx->data, NULL); 498 if (ctx->data != ctx->control) 499 usb_driver_release_interface(driver, ctx->data); 500 error: 501 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); 502 dev->data[0] = 0; 503 dev_info(&intf->dev, "bind() failure\n"); 504 return -ENODEV; 505 } 506 EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); 507 508 void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) 509 { 510 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 511 struct usb_driver *driver = driver_of(intf); 512 513 if (ctx == NULL) 514 return; /* no setup */ 515 516 atomic_set(&ctx->stop, 1); 517 518 if (hrtimer_active(&ctx->tx_timer)) 519 hrtimer_cancel(&ctx->tx_timer); 520 521 tasklet_kill(&ctx->bh); 522 523 /* handle devices with combined control and data interface */ 524 if (ctx->control == ctx->data) 525 ctx->data = NULL; 526 527 /* disconnect master --> disconnect slave */ 528 if (intf == ctx->control && ctx->data) { 529 usb_set_intfdata(ctx->data, NULL); 530 usb_driver_release_interface(driver, ctx->data); 531 ctx->data = NULL; 532 533 } else if (intf == ctx->data && ctx->control) { 534 usb_set_intfdata(ctx->control, NULL); 535 usb_driver_release_interface(driver, ctx->control); 536 ctx->control = NULL; 537 } 538 539 usb_set_intfdata(intf, NULL); 540 cdc_ncm_free(ctx); 541 } 542 EXPORT_SYMBOL_GPL(cdc_ncm_unbind); 543 544 /* Select the MBIM altsetting iff it is preferred and available, 545 * returning the number of the corresponding data interface altsetting 546 */ 547 u8 cdc_ncm_select_altsetting(struct usbnet *dev, struct usb_interface *intf) 548 { 549 struct usb_host_interface *alt; 550 551 /* The MBIM spec defines a NCM compatible default altsetting, 552 * which we may have matched: 553 * 554 * "Functions that implement both NCM 1.0 and MBIM (an 555 * “NCM/MBIM function”) according to this recommendation 556 * shall provide two alternate settings for the 557 * Communication Interface. Alternate setting 0, and the 558 * associated class and endpoint descriptors, shall be 559 * constructed according to the rules given for the 560 * Communication Interface in section 5 of [USBNCM10]. 561 * Alternate setting 1, and the associated class and 562 * endpoint descriptors, shall be constructed according to 563 * the rules given in section 6 (USB Device Model) of this 564 * specification." 565 */ 566 if (prefer_mbim && intf->num_altsetting == 2) { 567 alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); 568 if (alt && cdc_ncm_comm_intf_is_mbim(alt) && 569 !usb_set_interface(dev->udev, 570 intf->cur_altsetting->desc.bInterfaceNumber, 571 CDC_NCM_COMM_ALTSETTING_MBIM)) 572 return CDC_NCM_DATA_ALTSETTING_MBIM; 573 } 574 return CDC_NCM_DATA_ALTSETTING_NCM; 575 } 576 EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); 577 578 static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) 579 { 580 int ret; 581 582 /* MBIM backwards compatible function? */ 583 cdc_ncm_select_altsetting(dev, intf); 584 if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) 585 return -ENODEV; 586 587 /* NCM data altsetting is always 1 */ 588 ret = cdc_ncm_bind_common(dev, intf, 1); 589 590 /* 591 * We should get an event when network connection is "connected" or 592 * "disconnected". Set network connection in "disconnected" state 593 * (carrier is OFF) during attach, so the IP network stack does not 594 * start IPv6 negotiation and more. 595 */ 596 usbnet_link_change(dev, 0, 0); 597 return ret; 598 } 599 600 static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) 601 { 602 size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; 603 604 if (skb->len + align > max) 605 align = max - skb->len; 606 if (align && skb_tailroom(skb) >= align) 607 memset(skb_put(skb, align), 0, align); 608 } 609 610 /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly 611 * allocating a new one within skb 612 */ 613 static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) 614 { 615 struct usb_cdc_ncm_ndp16 *ndp16 = NULL; 616 struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; 617 size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); 618 619 /* follow the chain of NDPs, looking for a match */ 620 while (ndpoffset) { 621 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); 622 if (ndp16->dwSignature == sign) 623 return ndp16; 624 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 625 } 626 627 /* align new NDP */ 628 cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max); 629 630 /* verify that there is room for the NDP and the datagram (reserve) */ 631 if ((ctx->tx_max - skb->len - reserve) < CDC_NCM_NDP_SIZE) 632 return NULL; 633 634 /* link to it */ 635 if (ndp16) 636 ndp16->wNextNdpIndex = cpu_to_le16(skb->len); 637 else 638 nth16->wNdpIndex = cpu_to_le16(skb->len); 639 640 /* push a new empty NDP */ 641 ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, CDC_NCM_NDP_SIZE), 0, CDC_NCM_NDP_SIZE); 642 ndp16->dwSignature = sign; 643 ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); 644 return ndp16; 645 } 646 647 struct sk_buff * 648 cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign) 649 { 650 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 651 struct usb_cdc_ncm_nth16 *nth16; 652 struct usb_cdc_ncm_ndp16 *ndp16; 653 struct sk_buff *skb_out; 654 u16 n = 0, index, ndplen; 655 u8 ready2send = 0; 656 657 /* if there is a remaining skb, it gets priority */ 658 if (skb != NULL) { 659 swap(skb, ctx->tx_rem_skb); 660 swap(sign, ctx->tx_rem_sign); 661 } else { 662 ready2send = 1; 663 } 664 665 /* check if we are resuming an OUT skb */ 666 skb_out = ctx->tx_curr_skb; 667 668 /* allocate a new OUT skb */ 669 if (!skb_out) { 670 skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC); 671 if (skb_out == NULL) { 672 if (skb != NULL) { 673 dev_kfree_skb_any(skb); 674 dev->net->stats.tx_dropped++; 675 } 676 goto exit_no_skb; 677 } 678 /* fill out the initial 16-bit NTB header */ 679 nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16)); 680 nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); 681 nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); 682 nth16->wSequence = cpu_to_le16(ctx->tx_seq++); 683 684 /* count total number of frames in this NTB */ 685 ctx->tx_curr_frame_num = 0; 686 } 687 688 for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { 689 /* send any remaining skb first */ 690 if (skb == NULL) { 691 skb = ctx->tx_rem_skb; 692 sign = ctx->tx_rem_sign; 693 ctx->tx_rem_skb = NULL; 694 695 /* check for end of skb */ 696 if (skb == NULL) 697 break; 698 } 699 700 /* get the appropriate NDP for this skb */ 701 ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); 702 703 /* align beginning of next frame */ 704 cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max); 705 706 /* check if we had enough room left for both NDP and frame */ 707 if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) { 708 if (n == 0) { 709 /* won't fit, MTU problem? */ 710 dev_kfree_skb_any(skb); 711 skb = NULL; 712 dev->net->stats.tx_dropped++; 713 } else { 714 /* no room for skb - store for later */ 715 if (ctx->tx_rem_skb != NULL) { 716 dev_kfree_skb_any(ctx->tx_rem_skb); 717 dev->net->stats.tx_dropped++; 718 } 719 ctx->tx_rem_skb = skb; 720 ctx->tx_rem_sign = sign; 721 skb = NULL; 722 ready2send = 1; 723 } 724 break; 725 } 726 727 /* calculate frame number withing this NDP */ 728 ndplen = le16_to_cpu(ndp16->wLength); 729 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; 730 731 /* OK, add this skb */ 732 ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); 733 ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); 734 ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); 735 memcpy(skb_put(skb_out, skb->len), skb->data, skb->len); 736 dev_kfree_skb_any(skb); 737 skb = NULL; 738 739 /* send now if this NDP is full */ 740 if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { 741 ready2send = 1; 742 break; 743 } 744 } 745 746 /* free up any dangling skb */ 747 if (skb != NULL) { 748 dev_kfree_skb_any(skb); 749 skb = NULL; 750 dev->net->stats.tx_dropped++; 751 } 752 753 ctx->tx_curr_frame_num = n; 754 755 if (n == 0) { 756 /* wait for more frames */ 757 /* push variables */ 758 ctx->tx_curr_skb = skb_out; 759 goto exit_no_skb; 760 761 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) { 762 /* wait for more frames */ 763 /* push variables */ 764 ctx->tx_curr_skb = skb_out; 765 /* set the pending count */ 766 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) 767 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; 768 goto exit_no_skb; 769 770 } else { 771 /* frame goes out */ 772 /* variables will be reset at next call */ 773 } 774 775 /* If collected data size is less or equal CDC_NCM_MIN_TX_PKT 776 * bytes, we send buffers as it is. If we get more data, it 777 * would be more efficient for USB HS mobile device with DMA 778 * engine to receive a full size NTB, than canceling DMA 779 * transfer and receiving a short packet. 780 * 781 * This optimization support is pointless if we end up sending 782 * a ZLP after full sized NTBs. 783 */ 784 if (!(dev->driver_info->flags & FLAG_SEND_ZLP) && 785 skb_out->len > CDC_NCM_MIN_TX_PKT) 786 memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0, 787 ctx->tx_max - skb_out->len); 788 else if ((skb_out->len % dev->maxpacket) == 0) 789 *skb_put(skb_out, 1) = 0; /* force short packet */ 790 791 /* set final frame length */ 792 nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 793 nth16->wBlockLength = cpu_to_le16(skb_out->len); 794 795 /* return skb */ 796 ctx->tx_curr_skb = NULL; 797 dev->net->stats.tx_packets += ctx->tx_curr_frame_num; 798 return skb_out; 799 800 exit_no_skb: 801 /* Start timer, if there is a remaining skb */ 802 if (ctx->tx_curr_skb != NULL) 803 cdc_ncm_tx_timeout_start(ctx); 804 return NULL; 805 } 806 EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); 807 808 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) 809 { 810 /* start timer, if not already started */ 811 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) 812 hrtimer_start(&ctx->tx_timer, 813 ktime_set(0, CDC_NCM_TIMER_INTERVAL), 814 HRTIMER_MODE_REL); 815 } 816 817 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) 818 { 819 struct cdc_ncm_ctx *ctx = 820 container_of(timer, struct cdc_ncm_ctx, tx_timer); 821 822 if (!atomic_read(&ctx->stop)) 823 tasklet_schedule(&ctx->bh); 824 return HRTIMER_NORESTART; 825 } 826 827 static void cdc_ncm_txpath_bh(unsigned long param) 828 { 829 struct usbnet *dev = (struct usbnet *)param; 830 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 831 832 spin_lock_bh(&ctx->mtx); 833 if (ctx->tx_timer_pending != 0) { 834 ctx->tx_timer_pending--; 835 cdc_ncm_tx_timeout_start(ctx); 836 spin_unlock_bh(&ctx->mtx); 837 } else if (dev->net != NULL) { 838 spin_unlock_bh(&ctx->mtx); 839 netif_tx_lock_bh(dev->net); 840 usbnet_start_xmit(NULL, dev->net); 841 netif_tx_unlock_bh(dev->net); 842 } else { 843 spin_unlock_bh(&ctx->mtx); 844 } 845 } 846 847 struct sk_buff * 848 cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 849 { 850 struct sk_buff *skb_out; 851 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 852 853 /* 854 * The Ethernet API we are using does not support transmitting 855 * multiple Ethernet frames in a single call. This driver will 856 * accumulate multiple Ethernet frames and send out a larger 857 * USB frame when the USB buffer is full or when a single jiffies 858 * timeout happens. 859 */ 860 if (ctx == NULL) 861 goto error; 862 863 spin_lock_bh(&ctx->mtx); 864 skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); 865 spin_unlock_bh(&ctx->mtx); 866 return skb_out; 867 868 error: 869 if (skb != NULL) 870 dev_kfree_skb_any(skb); 871 872 return NULL; 873 } 874 EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup); 875 876 /* verify NTB header and return offset of first NDP, or negative error */ 877 int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) 878 { 879 struct usbnet *dev = netdev_priv(skb_in->dev); 880 struct usb_cdc_ncm_nth16 *nth16; 881 int len; 882 int ret = -EINVAL; 883 884 if (ctx == NULL) 885 goto error; 886 887 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + 888 sizeof(struct usb_cdc_ncm_ndp16))) { 889 netif_dbg(dev, rx_err, dev->net, "frame too short\n"); 890 goto error; 891 } 892 893 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; 894 895 if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) { 896 netif_dbg(dev, rx_err, dev->net, 897 "invalid NTH16 signature <%#010x>\n", 898 le32_to_cpu(nth16->dwSignature)); 899 goto error; 900 } 901 902 len = le16_to_cpu(nth16->wBlockLength); 903 if (len > ctx->rx_max) { 904 netif_dbg(dev, rx_err, dev->net, 905 "unsupported NTB block length %u/%u\n", len, 906 ctx->rx_max); 907 goto error; 908 } 909 910 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && 911 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && 912 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { 913 netif_dbg(dev, rx_err, dev->net, 914 "sequence number glitch prev=%d curr=%d\n", 915 ctx->rx_seq, le16_to_cpu(nth16->wSequence)); 916 } 917 ctx->rx_seq = le16_to_cpu(nth16->wSequence); 918 919 ret = le16_to_cpu(nth16->wNdpIndex); 920 error: 921 return ret; 922 } 923 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); 924 925 /* verify NDP header and return number of datagrams, or negative error */ 926 int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) 927 { 928 struct usbnet *dev = netdev_priv(skb_in->dev); 929 struct usb_cdc_ncm_ndp16 *ndp16; 930 int ret = -EINVAL; 931 932 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { 933 netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", 934 ndpoffset); 935 goto error; 936 } 937 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 938 939 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { 940 netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n", 941 le16_to_cpu(ndp16->wLength)); 942 goto error; 943 } 944 945 ret = ((le16_to_cpu(ndp16->wLength) - 946 sizeof(struct usb_cdc_ncm_ndp16)) / 947 sizeof(struct usb_cdc_ncm_dpe16)); 948 ret--; /* we process NDP entries except for the last one */ 949 950 if ((sizeof(struct usb_cdc_ncm_ndp16) + 951 ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) { 952 netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); 953 ret = -EINVAL; 954 } 955 956 error: 957 return ret; 958 } 959 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); 960 961 int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) 962 { 963 struct sk_buff *skb; 964 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 965 int len; 966 int nframes; 967 int x; 968 int offset; 969 struct usb_cdc_ncm_ndp16 *ndp16; 970 struct usb_cdc_ncm_dpe16 *dpe16; 971 int ndpoffset; 972 int loopcount = 50; /* arbitrary max preventing infinite loop */ 973 974 ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); 975 if (ndpoffset < 0) 976 goto error; 977 978 next_ndp: 979 nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); 980 if (nframes < 0) 981 goto error; 982 983 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 984 985 if (ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) { 986 netif_dbg(dev, rx_err, dev->net, 987 "invalid DPT16 signature <%#010x>\n", 988 le32_to_cpu(ndp16->dwSignature)); 989 goto err_ndp; 990 } 991 dpe16 = ndp16->dpe16; 992 993 for (x = 0; x < nframes; x++, dpe16++) { 994 offset = le16_to_cpu(dpe16->wDatagramIndex); 995 len = le16_to_cpu(dpe16->wDatagramLength); 996 997 /* 998 * CDC NCM ch. 3.7 999 * All entries after first NULL entry are to be ignored 1000 */ 1001 if ((offset == 0) || (len == 0)) { 1002 if (!x) 1003 goto err_ndp; /* empty NTB */ 1004 break; 1005 } 1006 1007 /* sanity checking */ 1008 if (((offset + len) > skb_in->len) || 1009 (len > ctx->rx_max) || (len < ETH_HLEN)) { 1010 netif_dbg(dev, rx_err, dev->net, 1011 "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n", 1012 x, offset, len, skb_in); 1013 if (!x) 1014 goto err_ndp; 1015 break; 1016 1017 } else { 1018 skb = skb_clone(skb_in, GFP_ATOMIC); 1019 if (!skb) 1020 goto error; 1021 skb->len = len; 1022 skb->data = ((u8 *)skb_in->data) + offset; 1023 skb_set_tail_pointer(skb, len); 1024 usbnet_skb_return(dev, skb); 1025 } 1026 } 1027 err_ndp: 1028 /* are there more NDPs to process? */ 1029 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 1030 if (ndpoffset && loopcount--) 1031 goto next_ndp; 1032 1033 return 1; 1034 error: 1035 return 0; 1036 } 1037 EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup); 1038 1039 static void 1040 cdc_ncm_speed_change(struct usbnet *dev, 1041 struct usb_cdc_speed_change *data) 1042 { 1043 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); 1044 uint32_t tx_speed = le32_to_cpu(data->ULBitRate); 1045 1046 /* 1047 * Currently the USB-NET API does not support reporting the actual 1048 * device speed. Do print it instead. 1049 */ 1050 if ((tx_speed > 1000000) && (rx_speed > 1000000)) { 1051 netif_info(dev, link, dev->net, 1052 "%u mbit/s downlink %u mbit/s uplink\n", 1053 (unsigned int)(rx_speed / 1000000U), 1054 (unsigned int)(tx_speed / 1000000U)); 1055 } else { 1056 netif_info(dev, link, dev->net, 1057 "%u kbit/s downlink %u kbit/s uplink\n", 1058 (unsigned int)(rx_speed / 1000U), 1059 (unsigned int)(tx_speed / 1000U)); 1060 } 1061 } 1062 1063 static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) 1064 { 1065 struct cdc_ncm_ctx *ctx; 1066 struct usb_cdc_notification *event; 1067 1068 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1069 1070 if (urb->actual_length < sizeof(*event)) 1071 return; 1072 1073 /* test for split data in 8-byte chunks */ 1074 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { 1075 cdc_ncm_speed_change(dev, 1076 (struct usb_cdc_speed_change *)urb->transfer_buffer); 1077 return; 1078 } 1079 1080 event = urb->transfer_buffer; 1081 1082 switch (event->bNotificationType) { 1083 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 1084 /* 1085 * According to the CDC NCM specification ch.7.1 1086 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be 1087 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. 1088 */ 1089 ctx->connected = le16_to_cpu(event->wValue); 1090 netif_info(dev, link, dev->net, 1091 "network connection: %sconnected\n", 1092 ctx->connected ? "" : "dis"); 1093 usbnet_link_change(dev, ctx->connected, 0); 1094 break; 1095 1096 case USB_CDC_NOTIFY_SPEED_CHANGE: 1097 if (urb->actual_length < (sizeof(*event) + 1098 sizeof(struct usb_cdc_speed_change))) 1099 set_bit(EVENT_STS_SPLIT, &dev->flags); 1100 else 1101 cdc_ncm_speed_change(dev, 1102 (struct usb_cdc_speed_change *)&event[1]); 1103 break; 1104 1105 default: 1106 dev_dbg(&dev->udev->dev, 1107 "NCM: unexpected notification 0x%02x!\n", 1108 event->bNotificationType); 1109 break; 1110 } 1111 } 1112 1113 static int cdc_ncm_check_connect(struct usbnet *dev) 1114 { 1115 struct cdc_ncm_ctx *ctx; 1116 1117 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1118 if (ctx == NULL) 1119 return 1; /* disconnected */ 1120 1121 return !ctx->connected; 1122 } 1123 1124 static const struct driver_info cdc_ncm_info = { 1125 .description = "CDC NCM", 1126 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET, 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 cdc_ncm_info, but with FLAG_WWAN */ 1137 static const struct driver_info wwan_info = { 1138 .description = "Mobile Broadband Network Device", 1139 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1140 | FLAG_WWAN, 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 /* Same as wwan_info, but with FLAG_NOARP */ 1151 static const struct driver_info wwan_noarp_info = { 1152 .description = "Mobile Broadband Network Device (NO ARP)", 1153 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1154 | FLAG_WWAN | FLAG_NOARP, 1155 .bind = cdc_ncm_bind, 1156 .unbind = cdc_ncm_unbind, 1157 .check_connect = cdc_ncm_check_connect, 1158 .manage_power = usbnet_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 /* tag Huawei devices as wwan */ 1196 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 1197 USB_CLASS_COMM, 1198 USB_CDC_SUBCLASS_NCM, 1199 USB_CDC_PROTO_NONE), 1200 .driver_info = (unsigned long)&wwan_info, 1201 }, 1202 1203 /* Infineon(now Intel) HSPA Modem platform */ 1204 { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, 1205 USB_CLASS_COMM, 1206 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1207 .driver_info = (unsigned long)&wwan_noarp_info, 1208 }, 1209 1210 /* Generic CDC-NCM devices */ 1211 { USB_INTERFACE_INFO(USB_CLASS_COMM, 1212 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1213 .driver_info = (unsigned long)&cdc_ncm_info, 1214 }, 1215 { 1216 }, 1217 }; 1218 MODULE_DEVICE_TABLE(usb, cdc_devs); 1219 1220 static struct usb_driver cdc_ncm_driver = { 1221 .name = "cdc_ncm", 1222 .id_table = cdc_devs, 1223 .probe = usbnet_probe, 1224 .disconnect = usbnet_disconnect, 1225 .suspend = usbnet_suspend, 1226 .resume = usbnet_resume, 1227 .reset_resume = usbnet_resume, 1228 .supports_autosuspend = 1, 1229 .disable_hub_initiated_lpm = 1, 1230 }; 1231 1232 module_usb_driver(cdc_ncm_driver); 1233 1234 MODULE_AUTHOR("Hans Petter Selasky"); 1235 MODULE_DESCRIPTION("USB CDC NCM host driver"); 1236 MODULE_LICENSE("Dual BSD/GPL"); 1237