1 /* 2 * cdc_ncm.c 3 * 4 * Copyright (C) ST-Ericsson 2010-2012 5 * Contact: Alexey Orishko <alexey.orishko@stericsson.com> 6 * Original author: Hans Petter Selasky <hans.petter.selasky@stericsson.com> 7 * 8 * USB Host Driver for Network Control Model (NCM) 9 * http://www.usb.org/developers/devclass_docs/NCM10.zip 10 * 11 * The NCM encoding, decoding and initialization logic 12 * derives from FreeBSD 8.x. if_cdce.c and if_cdcereg.h 13 * 14 * This software is available to you under a choice of one of two 15 * licenses. You may choose this file to be licensed under the terms 16 * of the GNU General Public License (GPL) Version 2 or the 2-clause 17 * BSD license listed below: 18 * 19 * Redistribution and use in source and binary forms, with or without 20 * modification, are permitted provided that the following conditions 21 * are met: 22 * 1. Redistributions of source code must retain the above copyright 23 * notice, this list of conditions and the following disclaimer. 24 * 2. Redistributions in binary form must reproduce the above copyright 25 * notice, this list of conditions and the following disclaimer in the 26 * documentation and/or other materials provided with the distribution. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #include <linux/module.h> 42 #include <linux/init.h> 43 #include <linux/netdevice.h> 44 #include <linux/ctype.h> 45 #include <linux/ethtool.h> 46 #include <linux/workqueue.h> 47 #include <linux/mii.h> 48 #include <linux/crc32.h> 49 #include <linux/usb.h> 50 #include <linux/hrtimer.h> 51 #include <linux/atomic.h> 52 #include <linux/usb/usbnet.h> 53 #include <linux/usb/cdc.h> 54 #include <linux/usb/cdc_ncm.h> 55 56 #define DRIVER_VERSION "14-Mar-2012" 57 58 #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM) 59 static bool prefer_mbim = true; 60 #else 61 static bool prefer_mbim; 62 #endif 63 module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR); 64 MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions"); 65 66 static void cdc_ncm_txpath_bh(unsigned long param); 67 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); 68 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); 69 static struct usb_driver cdc_ncm_driver; 70 71 static void 72 cdc_ncm_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 73 { 74 struct usbnet *dev = netdev_priv(net); 75 76 strlcpy(info->driver, dev->driver_name, sizeof(info->driver)); 77 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version)); 78 strlcpy(info->fw_version, dev->driver_info->description, 79 sizeof(info->fw_version)); 80 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info)); 81 } 82 83 static u8 cdc_ncm_setup(struct cdc_ncm_ctx *ctx) 84 { 85 u32 val; 86 u8 flags; 87 u8 iface_no; 88 int err; 89 int eth_hlen; 90 u16 ntb_fmt_supported; 91 u32 min_dgram_size; 92 u32 min_hdr_size; 93 struct usbnet *dev = netdev_priv(ctx->netdev); 94 95 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 96 97 err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, 98 USB_TYPE_CLASS | USB_DIR_IN 99 |USB_RECIP_INTERFACE, 100 0, iface_no, &ctx->ncm_parm, 101 sizeof(ctx->ncm_parm)); 102 if (err < 0) { 103 pr_debug("failed GET_NTB_PARAMETERS\n"); 104 return 1; 105 } 106 107 /* read correct set of parameters according to device mode */ 108 ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); 109 ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); 110 ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); 111 ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); 112 ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); 113 /* devices prior to NCM Errata shall set this field to zero */ 114 ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); 115 ntb_fmt_supported = le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported); 116 117 eth_hlen = ETH_HLEN; 118 min_dgram_size = CDC_NCM_MIN_DATAGRAM_SIZE; 119 min_hdr_size = CDC_NCM_MIN_HDR_SIZE; 120 if (ctx->mbim_desc != NULL) { 121 flags = ctx->mbim_desc->bmNetworkCapabilities; 122 eth_hlen = 0; 123 min_dgram_size = CDC_MBIM_MIN_DATAGRAM_SIZE; 124 min_hdr_size = 0; 125 } else if (ctx->func_desc != NULL) { 126 flags = ctx->func_desc->bmNetworkCapabilities; 127 } else { 128 flags = 0; 129 } 130 131 pr_debug("dwNtbInMaxSize=%u dwNtbOutMaxSize=%u " 132 "wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u " 133 "wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", 134 ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, 135 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, flags); 136 137 /* max count of tx datagrams */ 138 if ((ctx->tx_max_datagrams == 0) || 139 (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) 140 ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; 141 142 /* verify maximum size of received NTB in bytes */ 143 if (ctx->rx_max < USB_CDC_NCM_NTB_MIN_IN_SIZE) { 144 pr_debug("Using min receive length=%d\n", 145 USB_CDC_NCM_NTB_MIN_IN_SIZE); 146 ctx->rx_max = USB_CDC_NCM_NTB_MIN_IN_SIZE; 147 } 148 149 if (ctx->rx_max > CDC_NCM_NTB_MAX_SIZE_RX) { 150 pr_debug("Using default maximum receive length=%d\n", 151 CDC_NCM_NTB_MAX_SIZE_RX); 152 ctx->rx_max = CDC_NCM_NTB_MAX_SIZE_RX; 153 } 154 155 /* inform device about NTB input size changes */ 156 if (ctx->rx_max != le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)) { 157 __le32 dwNtbInMaxSize = cpu_to_le32(ctx->rx_max); 158 159 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, 160 USB_TYPE_CLASS | USB_DIR_OUT 161 | USB_RECIP_INTERFACE, 162 0, iface_no, &dwNtbInMaxSize, 4); 163 if (err < 0) 164 pr_debug("Setting NTB Input Size failed\n"); 165 } 166 167 /* verify maximum size of transmitted NTB in bytes */ 168 if ((ctx->tx_max < 169 (min_hdr_size + min_dgram_size)) || 170 (ctx->tx_max > CDC_NCM_NTB_MAX_SIZE_TX)) { 171 pr_debug("Using default maximum transmit length=%d\n", 172 CDC_NCM_NTB_MAX_SIZE_TX); 173 ctx->tx_max = CDC_NCM_NTB_MAX_SIZE_TX; 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 pr_debug("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 pr_debug("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 pr_debug("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 pr_debug("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 pr_debug("Setting NTB format to 16-bit failed\n"); 236 } 237 238 ctx->max_datagram_size = min_dgram_size; 239 240 /* set Max Datagram Size (MTU) */ 241 if (flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE) { 242 __le16 max_datagram_size; 243 u16 eth_max_sz; 244 if (ctx->ether_desc != NULL) 245 eth_max_sz = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 246 else if (ctx->mbim_desc != NULL) 247 eth_max_sz = le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); 248 else 249 goto max_dgram_err; 250 251 err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, 252 USB_TYPE_CLASS | USB_DIR_IN 253 | USB_RECIP_INTERFACE, 254 0, iface_no, &max_datagram_size, 2); 255 if (err < 0) { 256 pr_debug("GET_MAX_DATAGRAM_SIZE failed, use size=%u\n", 257 min_dgram_size); 258 } else { 259 ctx->max_datagram_size = 260 le16_to_cpu(max_datagram_size); 261 /* Check Eth descriptor value */ 262 if (ctx->max_datagram_size > eth_max_sz) 263 ctx->max_datagram_size = eth_max_sz; 264 265 if (ctx->max_datagram_size > CDC_NCM_MAX_DATAGRAM_SIZE) 266 ctx->max_datagram_size = CDC_NCM_MAX_DATAGRAM_SIZE; 267 268 if (ctx->max_datagram_size < min_dgram_size) 269 ctx->max_datagram_size = min_dgram_size; 270 271 /* if value changed, update device */ 272 if (ctx->max_datagram_size != 273 le16_to_cpu(max_datagram_size)) { 274 err = usbnet_write_cmd(dev, 275 USB_CDC_SET_MAX_DATAGRAM_SIZE, 276 USB_TYPE_CLASS | USB_DIR_OUT 277 | USB_RECIP_INTERFACE, 278 0, 279 iface_no, &max_datagram_size, 280 2); 281 if (err < 0) 282 pr_debug("SET_MAX_DGRAM_SIZE failed\n"); 283 } 284 } 285 } 286 287 max_dgram_err: 288 if (ctx->netdev->mtu != (ctx->max_datagram_size - eth_hlen)) 289 ctx->netdev->mtu = ctx->max_datagram_size - eth_hlen; 290 291 return 0; 292 } 293 294 static void 295 cdc_ncm_find_endpoints(struct cdc_ncm_ctx *ctx, struct usb_interface *intf) 296 { 297 struct usb_host_endpoint *e; 298 u8 ep; 299 300 for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { 301 302 e = intf->cur_altsetting->endpoint + ep; 303 switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 304 case USB_ENDPOINT_XFER_INT: 305 if (usb_endpoint_dir_in(&e->desc)) { 306 if (ctx->status_ep == NULL) 307 ctx->status_ep = e; 308 } 309 break; 310 311 case USB_ENDPOINT_XFER_BULK: 312 if (usb_endpoint_dir_in(&e->desc)) { 313 if (ctx->in_ep == NULL) 314 ctx->in_ep = e; 315 } else { 316 if (ctx->out_ep == NULL) 317 ctx->out_ep = e; 318 } 319 break; 320 321 default: 322 break; 323 } 324 } 325 } 326 327 static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) 328 { 329 if (ctx == NULL) 330 return; 331 332 if (ctx->tx_rem_skb != NULL) { 333 dev_kfree_skb_any(ctx->tx_rem_skb); 334 ctx->tx_rem_skb = NULL; 335 } 336 337 if (ctx->tx_curr_skb != NULL) { 338 dev_kfree_skb_any(ctx->tx_curr_skb); 339 ctx->tx_curr_skb = NULL; 340 } 341 342 kfree(ctx); 343 } 344 345 static const struct ethtool_ops cdc_ncm_ethtool_ops = { 346 .get_drvinfo = cdc_ncm_get_drvinfo, 347 .get_link = usbnet_get_link, 348 .get_msglevel = usbnet_get_msglevel, 349 .set_msglevel = usbnet_set_msglevel, 350 .get_settings = usbnet_get_settings, 351 .set_settings = usbnet_set_settings, 352 .nway_reset = usbnet_nway_reset, 353 }; 354 355 int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting) 356 { 357 struct cdc_ncm_ctx *ctx; 358 struct usb_driver *driver; 359 u8 *buf; 360 int len; 361 int temp; 362 u8 iface_no; 363 364 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 365 if (!ctx) 366 return -ENOMEM; 367 368 hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 369 ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; 370 ctx->bh.data = (unsigned long)ctx; 371 ctx->bh.func = cdc_ncm_txpath_bh; 372 atomic_set(&ctx->stop, 0); 373 spin_lock_init(&ctx->mtx); 374 ctx->netdev = dev->net; 375 376 /* store ctx pointer in device data field */ 377 dev->data[0] = (unsigned long)ctx; 378 379 /* get some pointers */ 380 driver = driver_of(intf); 381 buf = intf->cur_altsetting->extra; 382 len = intf->cur_altsetting->extralen; 383 384 ctx->udev = dev->udev; 385 ctx->intf = intf; 386 387 /* parse through descriptors associated with control interface */ 388 while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) { 389 390 if (buf[1] != USB_DT_CS_INTERFACE) 391 goto advance; 392 393 switch (buf[2]) { 394 case USB_CDC_UNION_TYPE: 395 if (buf[0] < sizeof(*(ctx->union_desc))) 396 break; 397 398 ctx->union_desc = 399 (const struct usb_cdc_union_desc *)buf; 400 401 ctx->control = usb_ifnum_to_if(dev->udev, 402 ctx->union_desc->bMasterInterface0); 403 ctx->data = usb_ifnum_to_if(dev->udev, 404 ctx->union_desc->bSlaveInterface0); 405 break; 406 407 case USB_CDC_ETHERNET_TYPE: 408 if (buf[0] < sizeof(*(ctx->ether_desc))) 409 break; 410 411 ctx->ether_desc = 412 (const struct usb_cdc_ether_desc *)buf; 413 dev->hard_mtu = 414 le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 415 416 if (dev->hard_mtu < CDC_NCM_MIN_DATAGRAM_SIZE) 417 dev->hard_mtu = CDC_NCM_MIN_DATAGRAM_SIZE; 418 else if (dev->hard_mtu > CDC_NCM_MAX_DATAGRAM_SIZE) 419 dev->hard_mtu = CDC_NCM_MAX_DATAGRAM_SIZE; 420 break; 421 422 case USB_CDC_NCM_TYPE: 423 if (buf[0] < sizeof(*(ctx->func_desc))) 424 break; 425 426 ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf; 427 break; 428 429 case USB_CDC_MBIM_TYPE: 430 if (buf[0] < sizeof(*(ctx->mbim_desc))) 431 break; 432 433 ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf; 434 break; 435 436 default: 437 break; 438 } 439 advance: 440 /* advance to next descriptor */ 441 temp = buf[0]; 442 buf += temp; 443 len -= temp; 444 } 445 446 /* some buggy devices have an IAD but no CDC Union */ 447 if (!ctx->union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) { 448 ctx->control = intf; 449 ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1); 450 dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n"); 451 } 452 453 /* check if we got everything */ 454 if ((ctx->control == NULL) || (ctx->data == NULL) || 455 ((!ctx->mbim_desc) && ((ctx->ether_desc == NULL) || (ctx->control != intf)))) 456 goto error; 457 458 /* claim data interface, if different from control */ 459 if (ctx->data != ctx->control) { 460 temp = usb_driver_claim_interface(driver, ctx->data, dev); 461 if (temp) 462 goto error; 463 } 464 465 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; 466 467 /* reset data interface */ 468 temp = usb_set_interface(dev->udev, iface_no, 0); 469 if (temp) 470 goto error2; 471 472 /* initialize data interface */ 473 if (cdc_ncm_setup(ctx)) 474 goto error2; 475 476 /* configure data interface */ 477 temp = usb_set_interface(dev->udev, iface_no, data_altsetting); 478 if (temp) 479 goto error2; 480 481 cdc_ncm_find_endpoints(ctx, ctx->data); 482 cdc_ncm_find_endpoints(ctx, ctx->control); 483 484 if ((ctx->in_ep == NULL) || (ctx->out_ep == NULL) || 485 (ctx->status_ep == NULL)) 486 goto error2; 487 488 dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; 489 490 usb_set_intfdata(ctx->data, dev); 491 usb_set_intfdata(ctx->control, dev); 492 usb_set_intfdata(ctx->intf, dev); 493 494 if (ctx->ether_desc) { 495 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); 496 if (temp) 497 goto error2; 498 dev_info(&dev->udev->dev, "MAC-Address: %pM\n", dev->net->dev_addr); 499 } 500 501 502 dev->in = usb_rcvbulkpipe(dev->udev, 503 ctx->in_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); 504 dev->out = usb_sndbulkpipe(dev->udev, 505 ctx->out_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); 506 dev->status = ctx->status_ep; 507 dev->rx_urb_size = ctx->rx_max; 508 509 ctx->tx_speed = ctx->rx_speed = 0; 510 return 0; 511 512 error2: 513 usb_set_intfdata(ctx->control, NULL); 514 usb_set_intfdata(ctx->data, NULL); 515 if (ctx->data != ctx->control) 516 usb_driver_release_interface(driver, ctx->data); 517 error: 518 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); 519 dev->data[0] = 0; 520 dev_info(&dev->udev->dev, "bind() failure\n"); 521 return -ENODEV; 522 } 523 EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); 524 525 void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) 526 { 527 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 528 struct usb_driver *driver = driver_of(intf); 529 530 if (ctx == NULL) 531 return; /* no setup */ 532 533 atomic_set(&ctx->stop, 1); 534 535 if (hrtimer_active(&ctx->tx_timer)) 536 hrtimer_cancel(&ctx->tx_timer); 537 538 tasklet_kill(&ctx->bh); 539 540 /* handle devices with combined control and data interface */ 541 if (ctx->control == ctx->data) 542 ctx->data = NULL; 543 544 /* disconnect master --> disconnect slave */ 545 if (intf == ctx->control && ctx->data) { 546 usb_set_intfdata(ctx->data, NULL); 547 usb_driver_release_interface(driver, ctx->data); 548 ctx->data = NULL; 549 550 } else if (intf == ctx->data && ctx->control) { 551 usb_set_intfdata(ctx->control, NULL); 552 usb_driver_release_interface(driver, ctx->control); 553 ctx->control = NULL; 554 } 555 556 usb_set_intfdata(ctx->intf, NULL); 557 cdc_ncm_free(ctx); 558 } 559 EXPORT_SYMBOL_GPL(cdc_ncm_unbind); 560 561 /* Select the MBIM altsetting iff it is preferred and available, 562 * returning the number of the corresponding data interface altsetting 563 */ 564 u8 cdc_ncm_select_altsetting(struct usbnet *dev, struct usb_interface *intf) 565 { 566 struct usb_host_interface *alt; 567 568 /* The MBIM spec defines a NCM compatible default altsetting, 569 * which we may have matched: 570 * 571 * "Functions that implement both NCM 1.0 and MBIM (an 572 * “NCM/MBIM function”) according to this recommendation 573 * shall provide two alternate settings for the 574 * Communication Interface. Alternate setting 0, and the 575 * associated class and endpoint descriptors, shall be 576 * constructed according to the rules given for the 577 * Communication Interface in section 5 of [USBNCM10]. 578 * Alternate setting 1, and the associated class and 579 * endpoint descriptors, shall be constructed according to 580 * the rules given in section 6 (USB Device Model) of this 581 * specification." 582 */ 583 if (prefer_mbim && intf->num_altsetting == 2) { 584 alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); 585 if (alt && cdc_ncm_comm_intf_is_mbim(alt) && 586 !usb_set_interface(dev->udev, 587 intf->cur_altsetting->desc.bInterfaceNumber, 588 CDC_NCM_COMM_ALTSETTING_MBIM)) 589 return CDC_NCM_DATA_ALTSETTING_MBIM; 590 } 591 return CDC_NCM_DATA_ALTSETTING_NCM; 592 } 593 EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); 594 595 static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) 596 { 597 int ret; 598 599 /* MBIM backwards compatible function? */ 600 cdc_ncm_select_altsetting(dev, intf); 601 if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) 602 return -ENODEV; 603 604 /* NCM data altsetting is always 1 */ 605 ret = cdc_ncm_bind_common(dev, intf, 1); 606 607 /* 608 * We should get an event when network connection is "connected" or 609 * "disconnected". Set network connection in "disconnected" state 610 * (carrier is OFF) during attach, so the IP network stack does not 611 * start IPv6 negotiation and more. 612 */ 613 usbnet_link_change(dev, 0, 0); 614 return ret; 615 } 616 617 static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) 618 { 619 size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; 620 621 if (skb->len + align > max) 622 align = max - skb->len; 623 if (align && skb_tailroom(skb) >= align) 624 memset(skb_put(skb, align), 0, align); 625 } 626 627 /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly 628 * allocating a new one within skb 629 */ 630 static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) 631 { 632 struct usb_cdc_ncm_ndp16 *ndp16 = NULL; 633 struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; 634 size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); 635 636 /* follow the chain of NDPs, looking for a match */ 637 while (ndpoffset) { 638 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); 639 if (ndp16->dwSignature == sign) 640 return ndp16; 641 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 642 } 643 644 /* align new NDP */ 645 cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max); 646 647 /* verify that there is room for the NDP and the datagram (reserve) */ 648 if ((ctx->tx_max - skb->len - reserve) < CDC_NCM_NDP_SIZE) 649 return NULL; 650 651 /* link to it */ 652 if (ndp16) 653 ndp16->wNextNdpIndex = cpu_to_le16(skb->len); 654 else 655 nth16->wNdpIndex = cpu_to_le16(skb->len); 656 657 /* push a new empty NDP */ 658 ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, CDC_NCM_NDP_SIZE), 0, CDC_NCM_NDP_SIZE); 659 ndp16->dwSignature = sign; 660 ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); 661 return ndp16; 662 } 663 664 struct sk_buff * 665 cdc_ncm_fill_tx_frame(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign) 666 { 667 struct usb_cdc_ncm_nth16 *nth16; 668 struct usb_cdc_ncm_ndp16 *ndp16; 669 struct sk_buff *skb_out; 670 u16 n = 0, index, ndplen; 671 u8 ready2send = 0; 672 673 /* if there is a remaining skb, it gets priority */ 674 if (skb != NULL) { 675 swap(skb, ctx->tx_rem_skb); 676 swap(sign, ctx->tx_rem_sign); 677 } else { 678 ready2send = 1; 679 } 680 681 /* check if we are resuming an OUT skb */ 682 skb_out = ctx->tx_curr_skb; 683 684 /* allocate a new OUT skb */ 685 if (!skb_out) { 686 skb_out = alloc_skb((ctx->tx_max + 1), GFP_ATOMIC); 687 if (skb_out == NULL) { 688 if (skb != NULL) { 689 dev_kfree_skb_any(skb); 690 ctx->netdev->stats.tx_dropped++; 691 } 692 goto exit_no_skb; 693 } 694 /* fill out the initial 16-bit NTB header */ 695 nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16)); 696 nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); 697 nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); 698 nth16->wSequence = cpu_to_le16(ctx->tx_seq++); 699 700 /* count total number of frames in this NTB */ 701 ctx->tx_curr_frame_num = 0; 702 } 703 704 for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { 705 /* send any remaining skb first */ 706 if (skb == NULL) { 707 skb = ctx->tx_rem_skb; 708 sign = ctx->tx_rem_sign; 709 ctx->tx_rem_skb = NULL; 710 711 /* check for end of skb */ 712 if (skb == NULL) 713 break; 714 } 715 716 /* get the appropriate NDP for this skb */ 717 ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); 718 719 /* align beginning of next frame */ 720 cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max); 721 722 /* check if we had enough room left for both NDP and frame */ 723 if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) { 724 if (n == 0) { 725 /* won't fit, MTU problem? */ 726 dev_kfree_skb_any(skb); 727 skb = NULL; 728 ctx->netdev->stats.tx_dropped++; 729 } else { 730 /* no room for skb - store for later */ 731 if (ctx->tx_rem_skb != NULL) { 732 dev_kfree_skb_any(ctx->tx_rem_skb); 733 ctx->netdev->stats.tx_dropped++; 734 } 735 ctx->tx_rem_skb = skb; 736 ctx->tx_rem_sign = sign; 737 skb = NULL; 738 ready2send = 1; 739 } 740 break; 741 } 742 743 /* calculate frame number withing this NDP */ 744 ndplen = le16_to_cpu(ndp16->wLength); 745 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; 746 747 /* OK, add this skb */ 748 ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); 749 ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); 750 ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); 751 memcpy(skb_put(skb_out, skb->len), skb->data, skb->len); 752 dev_kfree_skb_any(skb); 753 skb = NULL; 754 755 /* send now if this NDP is full */ 756 if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { 757 ready2send = 1; 758 break; 759 } 760 } 761 762 /* free up any dangling skb */ 763 if (skb != NULL) { 764 dev_kfree_skb_any(skb); 765 skb = NULL; 766 ctx->netdev->stats.tx_dropped++; 767 } 768 769 ctx->tx_curr_frame_num = n; 770 771 if (n == 0) { 772 /* wait for more frames */ 773 /* push variables */ 774 ctx->tx_curr_skb = skb_out; 775 goto exit_no_skb; 776 777 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) { 778 /* wait for more frames */ 779 /* push variables */ 780 ctx->tx_curr_skb = skb_out; 781 /* set the pending count */ 782 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) 783 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; 784 goto exit_no_skb; 785 786 } else { 787 /* frame goes out */ 788 /* variables will be reset at next call */ 789 } 790 791 /* 792 * If collected data size is less or equal CDC_NCM_MIN_TX_PKT bytes, 793 * we send buffers as it is. If we get more data, it would be more 794 * efficient for USB HS mobile device with DMA engine to receive a full 795 * size NTB, than canceling DMA transfer and receiving a short packet. 796 */ 797 if (skb_out->len > CDC_NCM_MIN_TX_PKT) 798 /* final zero padding */ 799 memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0, ctx->tx_max - skb_out->len); 800 801 /* do we need to prevent a ZLP? */ 802 if (((skb_out->len % le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0) && 803 (skb_out->len < le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)) && skb_tailroom(skb_out)) 804 *skb_put(skb_out, 1) = 0; /* force short packet */ 805 806 /* set final frame length */ 807 nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 808 nth16->wBlockLength = cpu_to_le16(skb_out->len); 809 810 /* return skb */ 811 ctx->tx_curr_skb = NULL; 812 ctx->netdev->stats.tx_packets += ctx->tx_curr_frame_num; 813 return skb_out; 814 815 exit_no_skb: 816 /* Start timer, if there is a remaining skb */ 817 if (ctx->tx_curr_skb != NULL) 818 cdc_ncm_tx_timeout_start(ctx); 819 return NULL; 820 } 821 EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); 822 823 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) 824 { 825 /* start timer, if not already started */ 826 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) 827 hrtimer_start(&ctx->tx_timer, 828 ktime_set(0, CDC_NCM_TIMER_INTERVAL), 829 HRTIMER_MODE_REL); 830 } 831 832 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) 833 { 834 struct cdc_ncm_ctx *ctx = 835 container_of(timer, struct cdc_ncm_ctx, tx_timer); 836 837 if (!atomic_read(&ctx->stop)) 838 tasklet_schedule(&ctx->bh); 839 return HRTIMER_NORESTART; 840 } 841 842 static void cdc_ncm_txpath_bh(unsigned long param) 843 { 844 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)param; 845 846 spin_lock_bh(&ctx->mtx); 847 if (ctx->tx_timer_pending != 0) { 848 ctx->tx_timer_pending--; 849 cdc_ncm_tx_timeout_start(ctx); 850 spin_unlock_bh(&ctx->mtx); 851 } else if (ctx->netdev != NULL) { 852 spin_unlock_bh(&ctx->mtx); 853 netif_tx_lock_bh(ctx->netdev); 854 usbnet_start_xmit(NULL, ctx->netdev); 855 netif_tx_unlock_bh(ctx->netdev); 856 } else { 857 spin_unlock_bh(&ctx->mtx); 858 } 859 } 860 861 static struct sk_buff * 862 cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 863 { 864 struct sk_buff *skb_out; 865 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 866 867 /* 868 * The Ethernet API we are using does not support transmitting 869 * multiple Ethernet frames in a single call. This driver will 870 * accumulate multiple Ethernet frames and send out a larger 871 * USB frame when the USB buffer is full or when a single jiffies 872 * timeout happens. 873 */ 874 if (ctx == NULL) 875 goto error; 876 877 spin_lock_bh(&ctx->mtx); 878 skb_out = cdc_ncm_fill_tx_frame(ctx, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); 879 spin_unlock_bh(&ctx->mtx); 880 return skb_out; 881 882 error: 883 if (skb != NULL) 884 dev_kfree_skb_any(skb); 885 886 return NULL; 887 } 888 889 /* verify NTB header and return offset of first NDP, or negative error */ 890 int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) 891 { 892 struct usb_cdc_ncm_nth16 *nth16; 893 int len; 894 int ret = -EINVAL; 895 896 if (ctx == NULL) 897 goto error; 898 899 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + 900 sizeof(struct usb_cdc_ncm_ndp16))) { 901 pr_debug("frame too short\n"); 902 goto error; 903 } 904 905 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; 906 907 if (le32_to_cpu(nth16->dwSignature) != USB_CDC_NCM_NTH16_SIGN) { 908 pr_debug("invalid NTH16 signature <%u>\n", 909 le32_to_cpu(nth16->dwSignature)); 910 goto error; 911 } 912 913 len = le16_to_cpu(nth16->wBlockLength); 914 if (len > ctx->rx_max) { 915 pr_debug("unsupported NTB block length %u/%u\n", len, 916 ctx->rx_max); 917 goto error; 918 } 919 920 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && 921 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && 922 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { 923 pr_debug("sequence number glitch prev=%d curr=%d\n", 924 ctx->rx_seq, le16_to_cpu(nth16->wSequence)); 925 } 926 ctx->rx_seq = le16_to_cpu(nth16->wSequence); 927 928 ret = le16_to_cpu(nth16->wNdpIndex); 929 error: 930 return ret; 931 } 932 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); 933 934 /* verify NDP header and return number of datagrams, or negative error */ 935 int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) 936 { 937 struct usb_cdc_ncm_ndp16 *ndp16; 938 int ret = -EINVAL; 939 940 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { 941 pr_debug("invalid NDP offset <%u>\n", ndpoffset); 942 goto error; 943 } 944 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 945 946 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { 947 pr_debug("invalid DPT16 length <%u>\n", 948 le32_to_cpu(ndp16->dwSignature)); 949 goto error; 950 } 951 952 ret = ((le16_to_cpu(ndp16->wLength) - 953 sizeof(struct usb_cdc_ncm_ndp16)) / 954 sizeof(struct usb_cdc_ncm_dpe16)); 955 ret--; /* we process NDP entries except for the last one */ 956 957 if ((sizeof(struct usb_cdc_ncm_ndp16) + ret * (sizeof(struct usb_cdc_ncm_dpe16))) > 958 skb_in->len) { 959 pr_debug("Invalid nframes = %d\n", ret); 960 ret = -EINVAL; 961 } 962 963 error: 964 return ret; 965 } 966 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); 967 968 static int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) 969 { 970 struct sk_buff *skb; 971 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 972 int len; 973 int nframes; 974 int x; 975 int offset; 976 struct usb_cdc_ncm_ndp16 *ndp16; 977 struct usb_cdc_ncm_dpe16 *dpe16; 978 int ndpoffset; 979 int loopcount = 50; /* arbitrary max preventing infinite loop */ 980 981 ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); 982 if (ndpoffset < 0) 983 goto error; 984 985 next_ndp: 986 nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); 987 if (nframes < 0) 988 goto error; 989 990 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 991 992 if (le32_to_cpu(ndp16->dwSignature) != USB_CDC_NCM_NDP16_NOCRC_SIGN) { 993 pr_debug("invalid DPT16 signature <%u>\n", 994 le32_to_cpu(ndp16->dwSignature)); 995 goto err_ndp; 996 } 997 dpe16 = ndp16->dpe16; 998 999 for (x = 0; x < nframes; x++, dpe16++) { 1000 offset = le16_to_cpu(dpe16->wDatagramIndex); 1001 len = le16_to_cpu(dpe16->wDatagramLength); 1002 1003 /* 1004 * CDC NCM ch. 3.7 1005 * All entries after first NULL entry are to be ignored 1006 */ 1007 if ((offset == 0) || (len == 0)) { 1008 if (!x) 1009 goto err_ndp; /* empty NTB */ 1010 break; 1011 } 1012 1013 /* sanity checking */ 1014 if (((offset + len) > skb_in->len) || 1015 (len > ctx->rx_max) || (len < ETH_HLEN)) { 1016 pr_debug("invalid frame detected (ignored)" 1017 "offset[%u]=%u, length=%u, skb=%p\n", 1018 x, offset, len, skb_in); 1019 if (!x) 1020 goto err_ndp; 1021 break; 1022 1023 } else { 1024 skb = skb_clone(skb_in, GFP_ATOMIC); 1025 if (!skb) 1026 goto error; 1027 skb->len = len; 1028 skb->data = ((u8 *)skb_in->data) + offset; 1029 skb_set_tail_pointer(skb, len); 1030 usbnet_skb_return(dev, skb); 1031 } 1032 } 1033 err_ndp: 1034 /* are there more NDPs to process? */ 1035 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 1036 if (ndpoffset && loopcount--) 1037 goto next_ndp; 1038 1039 return 1; 1040 error: 1041 return 0; 1042 } 1043 1044 static void 1045 cdc_ncm_speed_change(struct cdc_ncm_ctx *ctx, 1046 struct usb_cdc_speed_change *data) 1047 { 1048 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); 1049 uint32_t tx_speed = le32_to_cpu(data->ULBitRate); 1050 1051 /* 1052 * Currently the USB-NET API does not support reporting the actual 1053 * device speed. Do print it instead. 1054 */ 1055 if ((tx_speed != ctx->tx_speed) || (rx_speed != ctx->rx_speed)) { 1056 ctx->tx_speed = tx_speed; 1057 ctx->rx_speed = rx_speed; 1058 1059 if ((tx_speed > 1000000) && (rx_speed > 1000000)) { 1060 printk(KERN_INFO KBUILD_MODNAME 1061 ": %s: %u mbit/s downlink " 1062 "%u mbit/s uplink\n", 1063 ctx->netdev->name, 1064 (unsigned int)(rx_speed / 1000000U), 1065 (unsigned int)(tx_speed / 1000000U)); 1066 } else { 1067 printk(KERN_INFO KBUILD_MODNAME 1068 ": %s: %u kbit/s downlink " 1069 "%u kbit/s uplink\n", 1070 ctx->netdev->name, 1071 (unsigned int)(rx_speed / 1000U), 1072 (unsigned int)(tx_speed / 1000U)); 1073 } 1074 } 1075 } 1076 1077 static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) 1078 { 1079 struct cdc_ncm_ctx *ctx; 1080 struct usb_cdc_notification *event; 1081 1082 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1083 1084 if (urb->actual_length < sizeof(*event)) 1085 return; 1086 1087 /* test for split data in 8-byte chunks */ 1088 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { 1089 cdc_ncm_speed_change(ctx, 1090 (struct usb_cdc_speed_change *)urb->transfer_buffer); 1091 return; 1092 } 1093 1094 event = urb->transfer_buffer; 1095 1096 switch (event->bNotificationType) { 1097 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 1098 /* 1099 * According to the CDC NCM specification ch.7.1 1100 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be 1101 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. 1102 */ 1103 ctx->connected = le16_to_cpu(event->wValue); 1104 1105 printk(KERN_INFO KBUILD_MODNAME ": %s: network connection:" 1106 " %sconnected\n", 1107 ctx->netdev->name, ctx->connected ? "" : "dis"); 1108 1109 usbnet_link_change(dev, ctx->connected, 0); 1110 if (!ctx->connected) 1111 ctx->tx_speed = ctx->rx_speed = 0; 1112 break; 1113 1114 case USB_CDC_NOTIFY_SPEED_CHANGE: 1115 if (urb->actual_length < (sizeof(*event) + 1116 sizeof(struct usb_cdc_speed_change))) 1117 set_bit(EVENT_STS_SPLIT, &dev->flags); 1118 else 1119 cdc_ncm_speed_change(ctx, 1120 (struct usb_cdc_speed_change *) &event[1]); 1121 break; 1122 1123 default: 1124 dev_dbg(&dev->udev->dev, 1125 "NCM: unexpected notification 0x%02x!\n", 1126 event->bNotificationType); 1127 break; 1128 } 1129 } 1130 1131 static int cdc_ncm_check_connect(struct usbnet *dev) 1132 { 1133 struct cdc_ncm_ctx *ctx; 1134 1135 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1136 if (ctx == NULL) 1137 return 1; /* disconnected */ 1138 1139 return !ctx->connected; 1140 } 1141 1142 static int 1143 cdc_ncm_probe(struct usb_interface *udev, const struct usb_device_id *prod) 1144 { 1145 return usbnet_probe(udev, prod); 1146 } 1147 1148 static void cdc_ncm_disconnect(struct usb_interface *intf) 1149 { 1150 struct usbnet *dev = usb_get_intfdata(intf); 1151 1152 if (dev == NULL) 1153 return; /* already disconnected */ 1154 1155 usbnet_disconnect(intf); 1156 } 1157 1158 static const struct driver_info cdc_ncm_info = { 1159 .description = "CDC NCM", 1160 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET, 1161 .bind = cdc_ncm_bind, 1162 .unbind = cdc_ncm_unbind, 1163 .check_connect = cdc_ncm_check_connect, 1164 .manage_power = usbnet_manage_power, 1165 .status = cdc_ncm_status, 1166 .rx_fixup = cdc_ncm_rx_fixup, 1167 .tx_fixup = cdc_ncm_tx_fixup, 1168 }; 1169 1170 /* Same as cdc_ncm_info, but with FLAG_WWAN */ 1171 static const struct driver_info wwan_info = { 1172 .description = "Mobile Broadband Network Device", 1173 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1174 | FLAG_WWAN, 1175 .bind = cdc_ncm_bind, 1176 .unbind = cdc_ncm_unbind, 1177 .check_connect = cdc_ncm_check_connect, 1178 .manage_power = usbnet_manage_power, 1179 .status = cdc_ncm_status, 1180 .rx_fixup = cdc_ncm_rx_fixup, 1181 .tx_fixup = cdc_ncm_tx_fixup, 1182 }; 1183 1184 /* Same as wwan_info, but with FLAG_NOARP */ 1185 static const struct driver_info wwan_noarp_info = { 1186 .description = "Mobile Broadband Network Device (NO ARP)", 1187 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1188 | FLAG_WWAN | FLAG_NOARP, 1189 .bind = cdc_ncm_bind, 1190 .unbind = cdc_ncm_unbind, 1191 .check_connect = cdc_ncm_check_connect, 1192 .manage_power = usbnet_manage_power, 1193 .status = cdc_ncm_status, 1194 .rx_fixup = cdc_ncm_rx_fixup, 1195 .tx_fixup = cdc_ncm_tx_fixup, 1196 }; 1197 1198 static const struct usb_device_id cdc_devs[] = { 1199 /* Ericsson MBM devices like F5521gw */ 1200 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1201 | USB_DEVICE_ID_MATCH_VENDOR, 1202 .idVendor = 0x0bdb, 1203 .bInterfaceClass = USB_CLASS_COMM, 1204 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1205 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1206 .driver_info = (unsigned long) &wwan_info, 1207 }, 1208 1209 /* Dell branded MBM devices like DW5550 */ 1210 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1211 | USB_DEVICE_ID_MATCH_VENDOR, 1212 .idVendor = 0x413c, 1213 .bInterfaceClass = USB_CLASS_COMM, 1214 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1215 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1216 .driver_info = (unsigned long) &wwan_info, 1217 }, 1218 1219 /* Toshiba branded MBM devices */ 1220 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1221 | USB_DEVICE_ID_MATCH_VENDOR, 1222 .idVendor = 0x0930, 1223 .bInterfaceClass = USB_CLASS_COMM, 1224 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1225 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1226 .driver_info = (unsigned long) &wwan_info, 1227 }, 1228 1229 /* tag Huawei devices as wwan */ 1230 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 1231 USB_CLASS_COMM, 1232 USB_CDC_SUBCLASS_NCM, 1233 USB_CDC_PROTO_NONE), 1234 .driver_info = (unsigned long)&wwan_info, 1235 }, 1236 1237 /* Huawei NCM devices disguised as vendor specific */ 1238 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x16), 1239 .driver_info = (unsigned long)&wwan_info, 1240 }, 1241 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x46), 1242 .driver_info = (unsigned long)&wwan_info, 1243 }, 1244 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x76), 1245 .driver_info = (unsigned long)&wwan_info, 1246 }, 1247 1248 /* Infineon(now Intel) HSPA Modem platform */ 1249 { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, 1250 USB_CLASS_COMM, 1251 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1252 .driver_info = (unsigned long)&wwan_noarp_info, 1253 }, 1254 1255 /* Generic CDC-NCM devices */ 1256 { USB_INTERFACE_INFO(USB_CLASS_COMM, 1257 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1258 .driver_info = (unsigned long)&cdc_ncm_info, 1259 }, 1260 { 1261 }, 1262 }; 1263 MODULE_DEVICE_TABLE(usb, cdc_devs); 1264 1265 static struct usb_driver cdc_ncm_driver = { 1266 .name = "cdc_ncm", 1267 .id_table = cdc_devs, 1268 .probe = cdc_ncm_probe, 1269 .disconnect = cdc_ncm_disconnect, 1270 .suspend = usbnet_suspend, 1271 .resume = usbnet_resume, 1272 .reset_resume = usbnet_resume, 1273 .supports_autosuspend = 1, 1274 .disable_hub_initiated_lpm = 1, 1275 }; 1276 1277 module_usb_driver(cdc_ncm_driver); 1278 1279 MODULE_AUTHOR("Hans Petter Selasky"); 1280 MODULE_DESCRIPTION("USB CDC NCM host driver"); 1281 MODULE_LICENSE("Dual BSD/GPL"); 1282