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 55 #define DRIVER_VERSION "14-Mar-2012" 56 57 /* CDC NCM subclass 3.2.1 */ 58 #define USB_CDC_NCM_NDP16_LENGTH_MIN 0x10 59 60 /* Maximum NTB length */ 61 #define CDC_NCM_NTB_MAX_SIZE_TX 32768 /* bytes */ 62 #define CDC_NCM_NTB_MAX_SIZE_RX 32768 /* bytes */ 63 64 /* Minimum value for MaxDatagramSize, ch. 6.2.9 */ 65 #define CDC_NCM_MIN_DATAGRAM_SIZE 1514 /* bytes */ 66 67 #define CDC_NCM_MIN_TX_PKT 512 /* bytes */ 68 69 /* Default value for MaxDatagramSize */ 70 #define CDC_NCM_MAX_DATAGRAM_SIZE 8192 /* bytes */ 71 72 /* 73 * Maximum amount of datagrams in NCM Datagram Pointer Table, not counting 74 * the last NULL entry. 75 */ 76 #define CDC_NCM_DPT_DATAGRAMS_MAX 40 77 78 /* Restart the timer, if amount of datagrams is less than given value */ 79 #define CDC_NCM_RESTART_TIMER_DATAGRAM_CNT 3 80 #define CDC_NCM_TIMER_PENDING_CNT 2 81 #define CDC_NCM_TIMER_INTERVAL (400UL * NSEC_PER_USEC) 82 83 /* The following macro defines the minimum header space */ 84 #define CDC_NCM_MIN_HDR_SIZE \ 85 (sizeof(struct usb_cdc_ncm_nth16) + sizeof(struct usb_cdc_ncm_ndp16) + \ 86 (CDC_NCM_DPT_DATAGRAMS_MAX + 1) * sizeof(struct usb_cdc_ncm_dpe16)) 87 88 struct cdc_ncm_data { 89 struct usb_cdc_ncm_nth16 nth16; 90 struct usb_cdc_ncm_ndp16 ndp16; 91 struct usb_cdc_ncm_dpe16 dpe16[CDC_NCM_DPT_DATAGRAMS_MAX + 1]; 92 }; 93 94 struct cdc_ncm_ctx { 95 struct cdc_ncm_data tx_ncm; 96 struct usb_cdc_ncm_ntb_parameters ncm_parm; 97 struct hrtimer tx_timer; 98 struct tasklet_struct bh; 99 100 const struct usb_cdc_ncm_desc *func_desc; 101 const struct usb_cdc_header_desc *header_desc; 102 const struct usb_cdc_union_desc *union_desc; 103 const struct usb_cdc_ether_desc *ether_desc; 104 105 struct net_device *netdev; 106 struct usb_device *udev; 107 struct usb_host_endpoint *in_ep; 108 struct usb_host_endpoint *out_ep; 109 struct usb_host_endpoint *status_ep; 110 struct usb_interface *intf; 111 struct usb_interface *control; 112 struct usb_interface *data; 113 114 struct sk_buff *tx_curr_skb; 115 struct sk_buff *tx_rem_skb; 116 117 spinlock_t mtx; 118 atomic_t stop; 119 120 u32 tx_timer_pending; 121 u32 tx_curr_offset; 122 u32 tx_curr_last_offset; 123 u32 tx_curr_frame_num; 124 u32 rx_speed; 125 u32 tx_speed; 126 u32 rx_max; 127 u32 tx_max; 128 u32 max_datagram_size; 129 u16 tx_max_datagrams; 130 u16 tx_remainder; 131 u16 tx_modulus; 132 u16 tx_ndp_modulus; 133 u16 tx_seq; 134 u16 rx_seq; 135 u16 connected; 136 }; 137 138 static void cdc_ncm_txpath_bh(unsigned long param); 139 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); 140 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); 141 static struct usb_driver cdc_ncm_driver; 142 143 static void 144 cdc_ncm_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 145 { 146 struct usbnet *dev = netdev_priv(net); 147 148 strncpy(info->driver, dev->driver_name, sizeof(info->driver)); 149 strncpy(info->version, DRIVER_VERSION, sizeof(info->version)); 150 strncpy(info->fw_version, dev->driver_info->description, 151 sizeof(info->fw_version)); 152 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info)); 153 } 154 155 static u8 cdc_ncm_setup(struct cdc_ncm_ctx *ctx) 156 { 157 u32 val; 158 u8 flags; 159 u8 iface_no; 160 int err; 161 u16 ntb_fmt_supported; 162 163 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 164 165 err = usb_control_msg(ctx->udev, 166 usb_rcvctrlpipe(ctx->udev, 0), 167 USB_CDC_GET_NTB_PARAMETERS, 168 USB_TYPE_CLASS | USB_DIR_IN 169 | USB_RECIP_INTERFACE, 170 0, iface_no, &ctx->ncm_parm, 171 sizeof(ctx->ncm_parm), 10000); 172 if (err < 0) { 173 pr_debug("failed GET_NTB_PARAMETERS\n"); 174 return 1; 175 } 176 177 /* read correct set of parameters according to device mode */ 178 ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); 179 ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); 180 ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); 181 ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); 182 ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); 183 /* devices prior to NCM Errata shall set this field to zero */ 184 ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); 185 ntb_fmt_supported = le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported); 186 187 if (ctx->func_desc != NULL) 188 flags = ctx->func_desc->bmNetworkCapabilities; 189 else 190 flags = 0; 191 192 pr_debug("dwNtbInMaxSize=%u dwNtbOutMaxSize=%u " 193 "wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u " 194 "wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", 195 ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, 196 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, flags); 197 198 /* max count of tx datagrams */ 199 if ((ctx->tx_max_datagrams == 0) || 200 (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) 201 ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; 202 203 /* verify maximum size of received NTB in bytes */ 204 if (ctx->rx_max < USB_CDC_NCM_NTB_MIN_IN_SIZE) { 205 pr_debug("Using min receive length=%d\n", 206 USB_CDC_NCM_NTB_MIN_IN_SIZE); 207 ctx->rx_max = USB_CDC_NCM_NTB_MIN_IN_SIZE; 208 } 209 210 if (ctx->rx_max > CDC_NCM_NTB_MAX_SIZE_RX) { 211 pr_debug("Using default maximum receive length=%d\n", 212 CDC_NCM_NTB_MAX_SIZE_RX); 213 ctx->rx_max = CDC_NCM_NTB_MAX_SIZE_RX; 214 } 215 216 /* inform device about NTB input size changes */ 217 if (ctx->rx_max != le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)) { 218 219 if (flags & USB_CDC_NCM_NCAP_NTB_INPUT_SIZE) { 220 struct usb_cdc_ncm_ndp_input_size *ndp_in_sz; 221 222 ndp_in_sz = kzalloc(sizeof(*ndp_in_sz), GFP_KERNEL); 223 if (!ndp_in_sz) { 224 err = -ENOMEM; 225 goto size_err; 226 } 227 228 err = usb_control_msg(ctx->udev, 229 usb_sndctrlpipe(ctx->udev, 0), 230 USB_CDC_SET_NTB_INPUT_SIZE, 231 USB_TYPE_CLASS | USB_DIR_OUT 232 | USB_RECIP_INTERFACE, 233 0, iface_no, ndp_in_sz, 8, 1000); 234 kfree(ndp_in_sz); 235 } else { 236 __le32 *dwNtbInMaxSize; 237 dwNtbInMaxSize = kzalloc(sizeof(*dwNtbInMaxSize), 238 GFP_KERNEL); 239 if (!dwNtbInMaxSize) { 240 err = -ENOMEM; 241 goto size_err; 242 } 243 *dwNtbInMaxSize = cpu_to_le32(ctx->rx_max); 244 245 err = usb_control_msg(ctx->udev, 246 usb_sndctrlpipe(ctx->udev, 0), 247 USB_CDC_SET_NTB_INPUT_SIZE, 248 USB_TYPE_CLASS | USB_DIR_OUT 249 | USB_RECIP_INTERFACE, 250 0, iface_no, dwNtbInMaxSize, 4, 1000); 251 kfree(dwNtbInMaxSize); 252 } 253 size_err: 254 if (err < 0) 255 pr_debug("Setting NTB Input Size failed\n"); 256 } 257 258 /* verify maximum size of transmitted NTB in bytes */ 259 if ((ctx->tx_max < 260 (CDC_NCM_MIN_HDR_SIZE + CDC_NCM_MIN_DATAGRAM_SIZE)) || 261 (ctx->tx_max > CDC_NCM_NTB_MAX_SIZE_TX)) { 262 pr_debug("Using default maximum transmit length=%d\n", 263 CDC_NCM_NTB_MAX_SIZE_TX); 264 ctx->tx_max = CDC_NCM_NTB_MAX_SIZE_TX; 265 } 266 267 /* 268 * verify that the structure alignment is: 269 * - power of two 270 * - not greater than the maximum transmit length 271 * - not less than four bytes 272 */ 273 val = ctx->tx_ndp_modulus; 274 275 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 276 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 277 pr_debug("Using default alignment: 4 bytes\n"); 278 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 279 } 280 281 /* 282 * verify that the payload alignment is: 283 * - power of two 284 * - not greater than the maximum transmit length 285 * - not less than four bytes 286 */ 287 val = ctx->tx_modulus; 288 289 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 290 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 291 pr_debug("Using default transmit modulus: 4 bytes\n"); 292 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 293 } 294 295 /* verify the payload remainder */ 296 if (ctx->tx_remainder >= ctx->tx_modulus) { 297 pr_debug("Using default transmit remainder: 0 bytes\n"); 298 ctx->tx_remainder = 0; 299 } 300 301 /* adjust TX-remainder according to NCM specification. */ 302 ctx->tx_remainder = ((ctx->tx_remainder - ETH_HLEN) & 303 (ctx->tx_modulus - 1)); 304 305 /* additional configuration */ 306 307 /* set CRC Mode */ 308 if (flags & USB_CDC_NCM_NCAP_CRC_MODE) { 309 err = usb_control_msg(ctx->udev, usb_sndctrlpipe(ctx->udev, 0), 310 USB_CDC_SET_CRC_MODE, 311 USB_TYPE_CLASS | USB_DIR_OUT 312 | USB_RECIP_INTERFACE, 313 USB_CDC_NCM_CRC_NOT_APPENDED, 314 iface_no, NULL, 0, 1000); 315 if (err < 0) 316 pr_debug("Setting CRC mode off failed\n"); 317 } 318 319 /* set NTB format, if both formats are supported */ 320 if (ntb_fmt_supported & USB_CDC_NCM_NTH32_SIGN) { 321 err = usb_control_msg(ctx->udev, usb_sndctrlpipe(ctx->udev, 0), 322 USB_CDC_SET_NTB_FORMAT, USB_TYPE_CLASS 323 | USB_DIR_OUT | USB_RECIP_INTERFACE, 324 USB_CDC_NCM_NTB16_FORMAT, 325 iface_no, NULL, 0, 1000); 326 if (err < 0) 327 pr_debug("Setting NTB format to 16-bit failed\n"); 328 } 329 330 ctx->max_datagram_size = CDC_NCM_MIN_DATAGRAM_SIZE; 331 332 /* set Max Datagram Size (MTU) */ 333 if (flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE) { 334 __le16 *max_datagram_size; 335 u16 eth_max_sz = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 336 337 max_datagram_size = kzalloc(sizeof(*max_datagram_size), 338 GFP_KERNEL); 339 if (!max_datagram_size) { 340 err = -ENOMEM; 341 goto max_dgram_err; 342 } 343 344 err = usb_control_msg(ctx->udev, usb_rcvctrlpipe(ctx->udev, 0), 345 USB_CDC_GET_MAX_DATAGRAM_SIZE, 346 USB_TYPE_CLASS | USB_DIR_IN 347 | USB_RECIP_INTERFACE, 348 0, iface_no, max_datagram_size, 349 2, 1000); 350 if (err < 0) { 351 pr_debug("GET_MAX_DATAGRAM_SIZE failed, use size=%u\n", 352 CDC_NCM_MIN_DATAGRAM_SIZE); 353 } else { 354 ctx->max_datagram_size = 355 le16_to_cpu(*max_datagram_size); 356 /* Check Eth descriptor value */ 357 if (ctx->max_datagram_size > eth_max_sz) 358 ctx->max_datagram_size = eth_max_sz; 359 360 if (ctx->max_datagram_size > CDC_NCM_MAX_DATAGRAM_SIZE) 361 ctx->max_datagram_size = 362 CDC_NCM_MAX_DATAGRAM_SIZE; 363 364 if (ctx->max_datagram_size < CDC_NCM_MIN_DATAGRAM_SIZE) 365 ctx->max_datagram_size = 366 CDC_NCM_MIN_DATAGRAM_SIZE; 367 368 /* if value changed, update device */ 369 if (ctx->max_datagram_size != 370 le16_to_cpu(*max_datagram_size)) { 371 err = usb_control_msg(ctx->udev, 372 usb_sndctrlpipe(ctx->udev, 0), 373 USB_CDC_SET_MAX_DATAGRAM_SIZE, 374 USB_TYPE_CLASS | USB_DIR_OUT 375 | USB_RECIP_INTERFACE, 376 0, 377 iface_no, max_datagram_size, 378 2, 1000); 379 if (err < 0) 380 pr_debug("SET_MAX_DGRAM_SIZE failed\n"); 381 } 382 } 383 kfree(max_datagram_size); 384 } 385 386 max_dgram_err: 387 if (ctx->netdev->mtu != (ctx->max_datagram_size - ETH_HLEN)) 388 ctx->netdev->mtu = ctx->max_datagram_size - ETH_HLEN; 389 390 return 0; 391 } 392 393 static void 394 cdc_ncm_find_endpoints(struct cdc_ncm_ctx *ctx, struct usb_interface *intf) 395 { 396 struct usb_host_endpoint *e; 397 u8 ep; 398 399 for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { 400 401 e = intf->cur_altsetting->endpoint + ep; 402 switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 403 case USB_ENDPOINT_XFER_INT: 404 if (usb_endpoint_dir_in(&e->desc)) { 405 if (ctx->status_ep == NULL) 406 ctx->status_ep = e; 407 } 408 break; 409 410 case USB_ENDPOINT_XFER_BULK: 411 if (usb_endpoint_dir_in(&e->desc)) { 412 if (ctx->in_ep == NULL) 413 ctx->in_ep = e; 414 } else { 415 if (ctx->out_ep == NULL) 416 ctx->out_ep = e; 417 } 418 break; 419 420 default: 421 break; 422 } 423 } 424 } 425 426 static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) 427 { 428 if (ctx == NULL) 429 return; 430 431 if (ctx->tx_rem_skb != NULL) { 432 dev_kfree_skb_any(ctx->tx_rem_skb); 433 ctx->tx_rem_skb = NULL; 434 } 435 436 if (ctx->tx_curr_skb != NULL) { 437 dev_kfree_skb_any(ctx->tx_curr_skb); 438 ctx->tx_curr_skb = NULL; 439 } 440 441 kfree(ctx); 442 } 443 444 static const struct ethtool_ops cdc_ncm_ethtool_ops = { 445 .get_drvinfo = cdc_ncm_get_drvinfo, 446 .get_link = usbnet_get_link, 447 .get_msglevel = usbnet_get_msglevel, 448 .set_msglevel = usbnet_set_msglevel, 449 .get_settings = usbnet_get_settings, 450 .set_settings = usbnet_set_settings, 451 .nway_reset = usbnet_nway_reset, 452 }; 453 454 static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) 455 { 456 struct cdc_ncm_ctx *ctx; 457 struct usb_driver *driver; 458 u8 *buf; 459 int len; 460 int temp; 461 u8 iface_no; 462 463 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 464 if (ctx == NULL) 465 return -ENODEV; 466 467 hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 468 ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; 469 ctx->bh.data = (unsigned long)ctx; 470 ctx->bh.func = cdc_ncm_txpath_bh; 471 atomic_set(&ctx->stop, 0); 472 spin_lock_init(&ctx->mtx); 473 ctx->netdev = dev->net; 474 475 /* store ctx pointer in device data field */ 476 dev->data[0] = (unsigned long)ctx; 477 478 /* get some pointers */ 479 driver = driver_of(intf); 480 buf = intf->cur_altsetting->extra; 481 len = intf->cur_altsetting->extralen; 482 483 ctx->udev = dev->udev; 484 ctx->intf = intf; 485 486 /* parse through descriptors associated with control interface */ 487 while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) { 488 489 if (buf[1] != USB_DT_CS_INTERFACE) 490 goto advance; 491 492 switch (buf[2]) { 493 case USB_CDC_UNION_TYPE: 494 if (buf[0] < sizeof(*(ctx->union_desc))) 495 break; 496 497 ctx->union_desc = 498 (const struct usb_cdc_union_desc *)buf; 499 500 ctx->control = usb_ifnum_to_if(dev->udev, 501 ctx->union_desc->bMasterInterface0); 502 ctx->data = usb_ifnum_to_if(dev->udev, 503 ctx->union_desc->bSlaveInterface0); 504 break; 505 506 case USB_CDC_ETHERNET_TYPE: 507 if (buf[0] < sizeof(*(ctx->ether_desc))) 508 break; 509 510 ctx->ether_desc = 511 (const struct usb_cdc_ether_desc *)buf; 512 dev->hard_mtu = 513 le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 514 515 if (dev->hard_mtu < CDC_NCM_MIN_DATAGRAM_SIZE) 516 dev->hard_mtu = CDC_NCM_MIN_DATAGRAM_SIZE; 517 else if (dev->hard_mtu > CDC_NCM_MAX_DATAGRAM_SIZE) 518 dev->hard_mtu = CDC_NCM_MAX_DATAGRAM_SIZE; 519 break; 520 521 case USB_CDC_NCM_TYPE: 522 if (buf[0] < sizeof(*(ctx->func_desc))) 523 break; 524 525 ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf; 526 break; 527 528 default: 529 break; 530 } 531 advance: 532 /* advance to next descriptor */ 533 temp = buf[0]; 534 buf += temp; 535 len -= temp; 536 } 537 538 /* check if we got everything */ 539 if ((ctx->control == NULL) || (ctx->data == NULL) || 540 (ctx->ether_desc == NULL) || (ctx->control != intf)) 541 goto error; 542 543 /* claim data interface, if different from control */ 544 if (ctx->data != ctx->control) { 545 temp = usb_driver_claim_interface(driver, ctx->data, dev); 546 if (temp) 547 goto error; 548 } 549 550 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; 551 552 /* reset data interface */ 553 temp = usb_set_interface(dev->udev, iface_no, 0); 554 if (temp) 555 goto error2; 556 557 /* initialize data interface */ 558 if (cdc_ncm_setup(ctx)) 559 goto error2; 560 561 /* configure data interface */ 562 temp = usb_set_interface(dev->udev, iface_no, 1); 563 if (temp) 564 goto error2; 565 566 cdc_ncm_find_endpoints(ctx, ctx->data); 567 cdc_ncm_find_endpoints(ctx, ctx->control); 568 569 if ((ctx->in_ep == NULL) || (ctx->out_ep == NULL) || 570 (ctx->status_ep == NULL)) 571 goto error2; 572 573 dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; 574 575 usb_set_intfdata(ctx->data, dev); 576 usb_set_intfdata(ctx->control, dev); 577 usb_set_intfdata(ctx->intf, dev); 578 579 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); 580 if (temp) 581 goto error2; 582 583 dev_info(&dev->udev->dev, "MAC-Address: %pM\n", dev->net->dev_addr); 584 585 dev->in = usb_rcvbulkpipe(dev->udev, 586 ctx->in_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); 587 dev->out = usb_sndbulkpipe(dev->udev, 588 ctx->out_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); 589 dev->status = ctx->status_ep; 590 dev->rx_urb_size = ctx->rx_max; 591 592 /* 593 * We should get an event when network connection is "connected" or 594 * "disconnected". Set network connection in "disconnected" state 595 * (carrier is OFF) during attach, so the IP network stack does not 596 * start IPv6 negotiation and more. 597 */ 598 netif_carrier_off(dev->net); 599 ctx->tx_speed = ctx->rx_speed = 0; 600 return 0; 601 602 error2: 603 usb_set_intfdata(ctx->control, NULL); 604 usb_set_intfdata(ctx->data, NULL); 605 usb_driver_release_interface(driver, ctx->data); 606 error: 607 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); 608 dev->data[0] = 0; 609 dev_info(&dev->udev->dev, "bind() failure\n"); 610 return -ENODEV; 611 } 612 613 static void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) 614 { 615 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 616 struct usb_driver *driver = driver_of(intf); 617 618 if (ctx == NULL) 619 return; /* no setup */ 620 621 atomic_set(&ctx->stop, 1); 622 623 if (hrtimer_active(&ctx->tx_timer)) 624 hrtimer_cancel(&ctx->tx_timer); 625 626 tasklet_kill(&ctx->bh); 627 628 /* handle devices with combined control and data interface */ 629 if (ctx->control == ctx->data) 630 ctx->data = NULL; 631 632 /* disconnect master --> disconnect slave */ 633 if (intf == ctx->control && ctx->data) { 634 usb_set_intfdata(ctx->data, NULL); 635 usb_driver_release_interface(driver, ctx->data); 636 ctx->data = NULL; 637 638 } else if (intf == ctx->data && ctx->control) { 639 usb_set_intfdata(ctx->control, NULL); 640 usb_driver_release_interface(driver, ctx->control); 641 ctx->control = NULL; 642 } 643 644 usb_set_intfdata(ctx->intf, NULL); 645 cdc_ncm_free(ctx); 646 } 647 648 static void cdc_ncm_zero_fill(u8 *ptr, u32 first, u32 end, u32 max) 649 { 650 if (first >= max) 651 return; 652 if (first >= end) 653 return; 654 if (end > max) 655 end = max; 656 memset(ptr + first, 0, end - first); 657 } 658 659 static struct sk_buff * 660 cdc_ncm_fill_tx_frame(struct cdc_ncm_ctx *ctx, struct sk_buff *skb) 661 { 662 struct sk_buff *skb_out; 663 u32 rem; 664 u32 offset; 665 u32 last_offset; 666 u16 n = 0, index; 667 u8 ready2send = 0; 668 669 /* if there is a remaining skb, it gets priority */ 670 if (skb != NULL) 671 swap(skb, ctx->tx_rem_skb); 672 else 673 ready2send = 1; 674 675 /* 676 * +----------------+ 677 * | skb_out | 678 * +----------------+ 679 * ^ offset 680 * ^ last_offset 681 */ 682 683 /* check if we are resuming an OUT skb */ 684 if (ctx->tx_curr_skb != NULL) { 685 /* pop variables */ 686 skb_out = ctx->tx_curr_skb; 687 offset = ctx->tx_curr_offset; 688 last_offset = ctx->tx_curr_last_offset; 689 n = ctx->tx_curr_frame_num; 690 691 } else { 692 /* reset variables */ 693 skb_out = alloc_skb((ctx->tx_max + 1), GFP_ATOMIC); 694 if (skb_out == NULL) { 695 if (skb != NULL) { 696 dev_kfree_skb_any(skb); 697 ctx->netdev->stats.tx_dropped++; 698 } 699 goto exit_no_skb; 700 } 701 702 /* make room for NTH and NDP */ 703 offset = ALIGN(sizeof(struct usb_cdc_ncm_nth16), 704 ctx->tx_ndp_modulus) + 705 sizeof(struct usb_cdc_ncm_ndp16) + 706 (ctx->tx_max_datagrams + 1) * 707 sizeof(struct usb_cdc_ncm_dpe16); 708 709 /* store last valid offset before alignment */ 710 last_offset = offset; 711 /* align first Datagram offset correctly */ 712 offset = ALIGN(offset, ctx->tx_modulus) + ctx->tx_remainder; 713 /* zero buffer till the first IP datagram */ 714 cdc_ncm_zero_fill(skb_out->data, 0, offset, offset); 715 n = 0; 716 ctx->tx_curr_frame_num = 0; 717 } 718 719 for (; n < ctx->tx_max_datagrams; n++) { 720 /* check if end of transmit buffer is reached */ 721 if (offset >= ctx->tx_max) { 722 ready2send = 1; 723 break; 724 } 725 /* compute maximum buffer size */ 726 rem = ctx->tx_max - offset; 727 728 if (skb == NULL) { 729 skb = ctx->tx_rem_skb; 730 ctx->tx_rem_skb = NULL; 731 732 /* check for end of skb */ 733 if (skb == NULL) 734 break; 735 } 736 737 if (skb->len > rem) { 738 if (n == 0) { 739 /* won't fit, MTU problem? */ 740 dev_kfree_skb_any(skb); 741 skb = NULL; 742 ctx->netdev->stats.tx_dropped++; 743 } else { 744 /* no room for skb - store for later */ 745 if (ctx->tx_rem_skb != NULL) { 746 dev_kfree_skb_any(ctx->tx_rem_skb); 747 ctx->netdev->stats.tx_dropped++; 748 } 749 ctx->tx_rem_skb = skb; 750 skb = NULL; 751 ready2send = 1; 752 } 753 break; 754 } 755 756 memcpy(((u8 *)skb_out->data) + offset, skb->data, skb->len); 757 758 ctx->tx_ncm.dpe16[n].wDatagramLength = cpu_to_le16(skb->len); 759 ctx->tx_ncm.dpe16[n].wDatagramIndex = cpu_to_le16(offset); 760 761 /* update offset */ 762 offset += skb->len; 763 764 /* store last valid offset before alignment */ 765 last_offset = offset; 766 767 /* align offset correctly */ 768 offset = ALIGN(offset, ctx->tx_modulus) + ctx->tx_remainder; 769 770 /* zero padding */ 771 cdc_ncm_zero_fill(skb_out->data, last_offset, offset, 772 ctx->tx_max); 773 dev_kfree_skb_any(skb); 774 skb = NULL; 775 } 776 777 /* free up any dangling skb */ 778 if (skb != NULL) { 779 dev_kfree_skb_any(skb); 780 skb = NULL; 781 ctx->netdev->stats.tx_dropped++; 782 } 783 784 ctx->tx_curr_frame_num = n; 785 786 if (n == 0) { 787 /* wait for more frames */ 788 /* push variables */ 789 ctx->tx_curr_skb = skb_out; 790 ctx->tx_curr_offset = offset; 791 ctx->tx_curr_last_offset = last_offset; 792 goto exit_no_skb; 793 794 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) { 795 /* wait for more frames */ 796 /* push variables */ 797 ctx->tx_curr_skb = skb_out; 798 ctx->tx_curr_offset = offset; 799 ctx->tx_curr_last_offset = last_offset; 800 /* set the pending count */ 801 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) 802 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; 803 goto exit_no_skb; 804 805 } else { 806 /* frame goes out */ 807 /* variables will be reset at next call */ 808 } 809 810 /* check for overflow */ 811 if (last_offset > ctx->tx_max) 812 last_offset = ctx->tx_max; 813 814 /* revert offset */ 815 offset = last_offset; 816 817 /* 818 * If collected data size is less or equal CDC_NCM_MIN_TX_PKT bytes, 819 * we send buffers as it is. If we get more data, it would be more 820 * efficient for USB HS mobile device with DMA engine to receive a full 821 * size NTB, than canceling DMA transfer and receiving a short packet. 822 */ 823 if (offset > CDC_NCM_MIN_TX_PKT) 824 offset = ctx->tx_max; 825 826 /* final zero padding */ 827 cdc_ncm_zero_fill(skb_out->data, last_offset, offset, ctx->tx_max); 828 829 /* store last offset */ 830 last_offset = offset; 831 832 if (((last_offset < ctx->tx_max) && ((last_offset % 833 le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0)) || 834 (((last_offset == ctx->tx_max) && ((ctx->tx_max % 835 le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0)) && 836 (ctx->tx_max < le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)))) { 837 /* force short packet */ 838 *(((u8 *)skb_out->data) + last_offset) = 0; 839 last_offset++; 840 } 841 842 /* zero the rest of the DPEs plus the last NULL entry */ 843 for (; n <= CDC_NCM_DPT_DATAGRAMS_MAX; n++) { 844 ctx->tx_ncm.dpe16[n].wDatagramLength = 0; 845 ctx->tx_ncm.dpe16[n].wDatagramIndex = 0; 846 } 847 848 /* fill out 16-bit NTB header */ 849 ctx->tx_ncm.nth16.dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); 850 ctx->tx_ncm.nth16.wHeaderLength = 851 cpu_to_le16(sizeof(ctx->tx_ncm.nth16)); 852 ctx->tx_ncm.nth16.wSequence = cpu_to_le16(ctx->tx_seq); 853 ctx->tx_ncm.nth16.wBlockLength = cpu_to_le16(last_offset); 854 index = ALIGN(sizeof(struct usb_cdc_ncm_nth16), ctx->tx_ndp_modulus); 855 ctx->tx_ncm.nth16.wNdpIndex = cpu_to_le16(index); 856 857 memcpy(skb_out->data, &(ctx->tx_ncm.nth16), sizeof(ctx->tx_ncm.nth16)); 858 ctx->tx_seq++; 859 860 /* fill out 16-bit NDP table */ 861 ctx->tx_ncm.ndp16.dwSignature = 862 cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN); 863 rem = sizeof(ctx->tx_ncm.ndp16) + ((ctx->tx_curr_frame_num + 1) * 864 sizeof(struct usb_cdc_ncm_dpe16)); 865 ctx->tx_ncm.ndp16.wLength = cpu_to_le16(rem); 866 ctx->tx_ncm.ndp16.wNextNdpIndex = 0; /* reserved */ 867 868 memcpy(((u8 *)skb_out->data) + index, 869 &(ctx->tx_ncm.ndp16), 870 sizeof(ctx->tx_ncm.ndp16)); 871 872 memcpy(((u8 *)skb_out->data) + index + sizeof(ctx->tx_ncm.ndp16), 873 &(ctx->tx_ncm.dpe16), 874 (ctx->tx_curr_frame_num + 1) * 875 sizeof(struct usb_cdc_ncm_dpe16)); 876 877 /* set frame length */ 878 skb_put(skb_out, last_offset); 879 880 /* return skb */ 881 ctx->tx_curr_skb = NULL; 882 ctx->netdev->stats.tx_packets += ctx->tx_curr_frame_num; 883 return skb_out; 884 885 exit_no_skb: 886 /* Start timer, if there is a remaining skb */ 887 if (ctx->tx_curr_skb != NULL) 888 cdc_ncm_tx_timeout_start(ctx); 889 return NULL; 890 } 891 892 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) 893 { 894 /* start timer, if not already started */ 895 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) 896 hrtimer_start(&ctx->tx_timer, 897 ktime_set(0, CDC_NCM_TIMER_INTERVAL), 898 HRTIMER_MODE_REL); 899 } 900 901 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) 902 { 903 struct cdc_ncm_ctx *ctx = 904 container_of(timer, struct cdc_ncm_ctx, tx_timer); 905 906 if (!atomic_read(&ctx->stop)) 907 tasklet_schedule(&ctx->bh); 908 return HRTIMER_NORESTART; 909 } 910 911 static void cdc_ncm_txpath_bh(unsigned long param) 912 { 913 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)param; 914 915 spin_lock_bh(&ctx->mtx); 916 if (ctx->tx_timer_pending != 0) { 917 ctx->tx_timer_pending--; 918 cdc_ncm_tx_timeout_start(ctx); 919 spin_unlock_bh(&ctx->mtx); 920 } else if (ctx->netdev != NULL) { 921 spin_unlock_bh(&ctx->mtx); 922 netif_tx_lock_bh(ctx->netdev); 923 usbnet_start_xmit(NULL, ctx->netdev); 924 netif_tx_unlock_bh(ctx->netdev); 925 } 926 } 927 928 static struct sk_buff * 929 cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 930 { 931 struct sk_buff *skb_out; 932 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 933 934 /* 935 * The Ethernet API we are using does not support transmitting 936 * multiple Ethernet frames in a single call. This driver will 937 * accumulate multiple Ethernet frames and send out a larger 938 * USB frame when the USB buffer is full or when a single jiffies 939 * timeout happens. 940 */ 941 if (ctx == NULL) 942 goto error; 943 944 spin_lock_bh(&ctx->mtx); 945 skb_out = cdc_ncm_fill_tx_frame(ctx, skb); 946 spin_unlock_bh(&ctx->mtx); 947 return skb_out; 948 949 error: 950 if (skb != NULL) 951 dev_kfree_skb_any(skb); 952 953 return NULL; 954 } 955 956 static int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) 957 { 958 struct sk_buff *skb; 959 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 960 int len; 961 int nframes; 962 int x; 963 int offset; 964 struct usb_cdc_ncm_nth16 *nth16; 965 struct usb_cdc_ncm_ndp16 *ndp16; 966 struct usb_cdc_ncm_dpe16 *dpe16; 967 968 if (ctx == NULL) 969 goto error; 970 971 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + 972 sizeof(struct usb_cdc_ncm_ndp16))) { 973 pr_debug("frame too short\n"); 974 goto error; 975 } 976 977 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; 978 979 if (le32_to_cpu(nth16->dwSignature) != USB_CDC_NCM_NTH16_SIGN) { 980 pr_debug("invalid NTH16 signature <%u>\n", 981 le32_to_cpu(nth16->dwSignature)); 982 goto error; 983 } 984 985 len = le16_to_cpu(nth16->wBlockLength); 986 if (len > ctx->rx_max) { 987 pr_debug("unsupported NTB block length %u/%u\n", len, 988 ctx->rx_max); 989 goto error; 990 } 991 992 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && 993 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && 994 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { 995 pr_debug("sequence number glitch prev=%d curr=%d\n", 996 ctx->rx_seq, le16_to_cpu(nth16->wSequence)); 997 } 998 ctx->rx_seq = le16_to_cpu(nth16->wSequence); 999 1000 len = le16_to_cpu(nth16->wNdpIndex); 1001 if ((len + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { 1002 pr_debug("invalid DPT16 index <%u>\n", 1003 le16_to_cpu(nth16->wNdpIndex)); 1004 goto error; 1005 } 1006 1007 ndp16 = (struct usb_cdc_ncm_ndp16 *)(((u8 *)skb_in->data) + len); 1008 1009 if (le32_to_cpu(ndp16->dwSignature) != USB_CDC_NCM_NDP16_NOCRC_SIGN) { 1010 pr_debug("invalid DPT16 signature <%u>\n", 1011 le32_to_cpu(ndp16->dwSignature)); 1012 goto error; 1013 } 1014 1015 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { 1016 pr_debug("invalid DPT16 length <%u>\n", 1017 le32_to_cpu(ndp16->dwSignature)); 1018 goto error; 1019 } 1020 1021 nframes = ((le16_to_cpu(ndp16->wLength) - 1022 sizeof(struct usb_cdc_ncm_ndp16)) / 1023 sizeof(struct usb_cdc_ncm_dpe16)); 1024 nframes--; /* we process NDP entries except for the last one */ 1025 1026 len += sizeof(struct usb_cdc_ncm_ndp16); 1027 1028 if ((len + nframes * (sizeof(struct usb_cdc_ncm_dpe16))) > 1029 skb_in->len) { 1030 pr_debug("Invalid nframes = %d\n", nframes); 1031 goto error; 1032 } 1033 1034 dpe16 = (struct usb_cdc_ncm_dpe16 *)(((u8 *)skb_in->data) + len); 1035 1036 for (x = 0; x < nframes; x++, dpe16++) { 1037 offset = le16_to_cpu(dpe16->wDatagramIndex); 1038 len = le16_to_cpu(dpe16->wDatagramLength); 1039 1040 /* 1041 * CDC NCM ch. 3.7 1042 * All entries after first NULL entry are to be ignored 1043 */ 1044 if ((offset == 0) || (len == 0)) { 1045 if (!x) 1046 goto error; /* empty NTB */ 1047 break; 1048 } 1049 1050 /* sanity checking */ 1051 if (((offset + len) > skb_in->len) || 1052 (len > ctx->rx_max) || (len < ETH_HLEN)) { 1053 pr_debug("invalid frame detected (ignored)" 1054 "offset[%u]=%u, length=%u, skb=%p\n", 1055 x, offset, len, skb_in); 1056 if (!x) 1057 goto error; 1058 break; 1059 1060 } else { 1061 skb = skb_clone(skb_in, GFP_ATOMIC); 1062 if (!skb) 1063 goto error; 1064 skb->len = len; 1065 skb->data = ((u8 *)skb_in->data) + offset; 1066 skb_set_tail_pointer(skb, len); 1067 usbnet_skb_return(dev, skb); 1068 } 1069 } 1070 return 1; 1071 error: 1072 return 0; 1073 } 1074 1075 static void 1076 cdc_ncm_speed_change(struct cdc_ncm_ctx *ctx, 1077 struct usb_cdc_speed_change *data) 1078 { 1079 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); 1080 uint32_t tx_speed = le32_to_cpu(data->ULBitRate); 1081 1082 /* 1083 * Currently the USB-NET API does not support reporting the actual 1084 * device speed. Do print it instead. 1085 */ 1086 if ((tx_speed != ctx->tx_speed) || (rx_speed != ctx->rx_speed)) { 1087 ctx->tx_speed = tx_speed; 1088 ctx->rx_speed = rx_speed; 1089 1090 if ((tx_speed > 1000000) && (rx_speed > 1000000)) { 1091 printk(KERN_INFO KBUILD_MODNAME 1092 ": %s: %u mbit/s downlink " 1093 "%u mbit/s uplink\n", 1094 ctx->netdev->name, 1095 (unsigned int)(rx_speed / 1000000U), 1096 (unsigned int)(tx_speed / 1000000U)); 1097 } else { 1098 printk(KERN_INFO KBUILD_MODNAME 1099 ": %s: %u kbit/s downlink " 1100 "%u kbit/s uplink\n", 1101 ctx->netdev->name, 1102 (unsigned int)(rx_speed / 1000U), 1103 (unsigned int)(tx_speed / 1000U)); 1104 } 1105 } 1106 } 1107 1108 static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) 1109 { 1110 struct cdc_ncm_ctx *ctx; 1111 struct usb_cdc_notification *event; 1112 1113 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1114 1115 if (urb->actual_length < sizeof(*event)) 1116 return; 1117 1118 /* test for split data in 8-byte chunks */ 1119 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { 1120 cdc_ncm_speed_change(ctx, 1121 (struct usb_cdc_speed_change *)urb->transfer_buffer); 1122 return; 1123 } 1124 1125 event = urb->transfer_buffer; 1126 1127 switch (event->bNotificationType) { 1128 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 1129 /* 1130 * According to the CDC NCM specification ch.7.1 1131 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be 1132 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. 1133 */ 1134 ctx->connected = event->wValue; 1135 1136 printk(KERN_INFO KBUILD_MODNAME ": %s: network connection:" 1137 " %sconnected\n", 1138 ctx->netdev->name, ctx->connected ? "" : "dis"); 1139 1140 if (ctx->connected) 1141 netif_carrier_on(dev->net); 1142 else { 1143 netif_carrier_off(dev->net); 1144 ctx->tx_speed = ctx->rx_speed = 0; 1145 } 1146 break; 1147 1148 case USB_CDC_NOTIFY_SPEED_CHANGE: 1149 if (urb->actual_length < (sizeof(*event) + 1150 sizeof(struct usb_cdc_speed_change))) 1151 set_bit(EVENT_STS_SPLIT, &dev->flags); 1152 else 1153 cdc_ncm_speed_change(ctx, 1154 (struct usb_cdc_speed_change *) &event[1]); 1155 break; 1156 1157 default: 1158 dev_err(&dev->udev->dev, "NCM: unexpected " 1159 "notification 0x%02x!\n", event->bNotificationType); 1160 break; 1161 } 1162 } 1163 1164 static int cdc_ncm_check_connect(struct usbnet *dev) 1165 { 1166 struct cdc_ncm_ctx *ctx; 1167 1168 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1169 if (ctx == NULL) 1170 return 1; /* disconnected */ 1171 1172 return !ctx->connected; 1173 } 1174 1175 static int 1176 cdc_ncm_probe(struct usb_interface *udev, const struct usb_device_id *prod) 1177 { 1178 return usbnet_probe(udev, prod); 1179 } 1180 1181 static void cdc_ncm_disconnect(struct usb_interface *intf) 1182 { 1183 struct usbnet *dev = usb_get_intfdata(intf); 1184 1185 if (dev == NULL) 1186 return; /* already disconnected */ 1187 1188 usbnet_disconnect(intf); 1189 } 1190 1191 static int cdc_ncm_manage_power(struct usbnet *dev, int status) 1192 { 1193 dev->intf->needs_remote_wakeup = status; 1194 return 0; 1195 } 1196 1197 static const struct driver_info cdc_ncm_info = { 1198 .description = "CDC NCM", 1199 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET, 1200 .bind = cdc_ncm_bind, 1201 .unbind = cdc_ncm_unbind, 1202 .check_connect = cdc_ncm_check_connect, 1203 .manage_power = cdc_ncm_manage_power, 1204 .status = cdc_ncm_status, 1205 .rx_fixup = cdc_ncm_rx_fixup, 1206 .tx_fixup = cdc_ncm_tx_fixup, 1207 }; 1208 1209 /* Same as cdc_ncm_info, but with FLAG_WWAN */ 1210 static const struct driver_info wwan_info = { 1211 .description = "Mobile Broadband Network Device", 1212 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1213 | FLAG_WWAN, 1214 .bind = cdc_ncm_bind, 1215 .unbind = cdc_ncm_unbind, 1216 .check_connect = cdc_ncm_check_connect, 1217 .manage_power = cdc_ncm_manage_power, 1218 .status = cdc_ncm_status, 1219 .rx_fixup = cdc_ncm_rx_fixup, 1220 .tx_fixup = cdc_ncm_tx_fixup, 1221 }; 1222 1223 static const struct usb_device_id cdc_devs[] = { 1224 /* Ericsson MBM devices like F5521gw */ 1225 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1226 | USB_DEVICE_ID_MATCH_VENDOR, 1227 .idVendor = 0x0bdb, 1228 .bInterfaceClass = USB_CLASS_COMM, 1229 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1230 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1231 .driver_info = (unsigned long) &wwan_info, 1232 }, 1233 1234 /* Dell branded MBM devices like DW5550 */ 1235 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1236 | USB_DEVICE_ID_MATCH_VENDOR, 1237 .idVendor = 0x413c, 1238 .bInterfaceClass = USB_CLASS_COMM, 1239 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1240 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1241 .driver_info = (unsigned long) &wwan_info, 1242 }, 1243 1244 /* Toshiba branded MBM devices */ 1245 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1246 | USB_DEVICE_ID_MATCH_VENDOR, 1247 .idVendor = 0x0930, 1248 .bInterfaceClass = USB_CLASS_COMM, 1249 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1250 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1251 .driver_info = (unsigned long) &wwan_info, 1252 }, 1253 1254 /* Huawei NCM devices disguised as vendor specific */ 1255 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x16), 1256 .driver_info = (unsigned long)&wwan_info, 1257 }, 1258 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x46), 1259 .driver_info = (unsigned long)&wwan_info, 1260 }, 1261 1262 /* Generic CDC-NCM devices */ 1263 { USB_INTERFACE_INFO(USB_CLASS_COMM, 1264 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1265 .driver_info = (unsigned long)&cdc_ncm_info, 1266 }, 1267 { 1268 }, 1269 }; 1270 MODULE_DEVICE_TABLE(usb, cdc_devs); 1271 1272 static struct usb_driver cdc_ncm_driver = { 1273 .name = "cdc_ncm", 1274 .id_table = cdc_devs, 1275 .probe = cdc_ncm_probe, 1276 .disconnect = cdc_ncm_disconnect, 1277 .suspend = usbnet_suspend, 1278 .resume = usbnet_resume, 1279 .reset_resume = usbnet_resume, 1280 .supports_autosuspend = 1, 1281 .disable_hub_initiated_lpm = 1, 1282 }; 1283 1284 module_usb_driver(cdc_ncm_driver); 1285 1286 MODULE_AUTHOR("Hans Petter Selasky"); 1287 MODULE_DESCRIPTION("USB CDC NCM host driver"); 1288 MODULE_LICENSE("Dual BSD/GPL"); 1289