1 /* 2 * cdc_ncm.c 3 * 4 * Copyright (C) ST-Ericsson 2010-2011 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/timer.h> 51 #include <linux/spinlock.h> 52 #include <linux/atomic.h> 53 #include <linux/usb/usbnet.h> 54 #include <linux/usb/cdc.h> 55 56 #define DRIVER_VERSION "04-Aug-2011" 57 58 /* CDC NCM subclass 3.2.1 */ 59 #define USB_CDC_NCM_NDP16_LENGTH_MIN 0x10 60 61 /* Maximum NTB length */ 62 #define CDC_NCM_NTB_MAX_SIZE_TX 16384 /* bytes */ 63 #define CDC_NCM_NTB_MAX_SIZE_RX 16384 /* bytes */ 64 65 /* Minimum value for MaxDatagramSize, ch. 6.2.9 */ 66 #define CDC_NCM_MIN_DATAGRAM_SIZE 1514 /* bytes */ 67 68 #define CDC_NCM_MIN_TX_PKT 512 /* bytes */ 69 70 /* Default value for MaxDatagramSize */ 71 #define CDC_NCM_MAX_DATAGRAM_SIZE 2048 /* bytes */ 72 73 /* 74 * Maximum amount of datagrams in NCM Datagram Pointer Table, not counting 75 * the last NULL entry. Any additional datagrams in NTB would be discarded. 76 */ 77 #define CDC_NCM_DPT_DATAGRAMS_MAX 32 78 79 /* Maximum amount of IN datagrams in NTB */ 80 #define CDC_NCM_DPT_DATAGRAMS_IN_MAX 0 /* unlimited */ 81 82 /* Restart the timer, if amount of datagrams is less than given value */ 83 #define CDC_NCM_RESTART_TIMER_DATAGRAM_CNT 3 84 85 /* The following macro defines the minimum header space */ 86 #define CDC_NCM_MIN_HDR_SIZE \ 87 (sizeof(struct usb_cdc_ncm_nth16) + sizeof(struct usb_cdc_ncm_ndp16) + \ 88 (CDC_NCM_DPT_DATAGRAMS_MAX + 1) * sizeof(struct usb_cdc_ncm_dpe16)) 89 90 struct cdc_ncm_data { 91 struct usb_cdc_ncm_nth16 nth16; 92 struct usb_cdc_ncm_ndp16 ndp16; 93 struct usb_cdc_ncm_dpe16 dpe16[CDC_NCM_DPT_DATAGRAMS_MAX + 1]; 94 }; 95 96 struct cdc_ncm_ctx { 97 struct cdc_ncm_data rx_ncm; 98 struct cdc_ncm_data tx_ncm; 99 struct usb_cdc_ncm_ntb_parameters ncm_parm; 100 struct timer_list tx_timer; 101 102 const struct usb_cdc_ncm_desc *func_desc; 103 const struct usb_cdc_header_desc *header_desc; 104 const struct usb_cdc_union_desc *union_desc; 105 const struct usb_cdc_ether_desc *ether_desc; 106 107 struct net_device *netdev; 108 struct usb_device *udev; 109 struct usb_host_endpoint *in_ep; 110 struct usb_host_endpoint *out_ep; 111 struct usb_host_endpoint *status_ep; 112 struct usb_interface *intf; 113 struct usb_interface *control; 114 struct usb_interface *data; 115 116 struct sk_buff *tx_curr_skb; 117 struct sk_buff *tx_rem_skb; 118 119 spinlock_t mtx; 120 121 u32 tx_timer_pending; 122 u32 tx_curr_offset; 123 u32 tx_curr_last_offset; 124 u32 tx_curr_frame_num; 125 u32 rx_speed; 126 u32 tx_speed; 127 u32 rx_max; 128 u32 tx_max; 129 u32 max_datagram_size; 130 u16 tx_max_datagrams; 131 u16 tx_remainder; 132 u16 tx_modulus; 133 u16 tx_ndp_modulus; 134 u16 tx_seq; 135 u16 connected; 136 }; 137 138 static void cdc_ncm_tx_timeout(unsigned long arg); 139 static const struct driver_info cdc_ncm_info; 140 static struct usb_driver cdc_ncm_driver; 141 static struct ethtool_ops cdc_ncm_ethtool_ops; 142 143 static const struct usb_device_id cdc_devs[] = { 144 { USB_INTERFACE_INFO(USB_CLASS_COMM, 145 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 146 .driver_info = (unsigned long)&cdc_ncm_info, 147 }, 148 { 149 }, 150 }; 151 152 MODULE_DEVICE_TABLE(usb, cdc_devs); 153 154 static void 155 cdc_ncm_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 156 { 157 struct usbnet *dev = netdev_priv(net); 158 159 strncpy(info->driver, dev->driver_name, sizeof(info->driver)); 160 strncpy(info->version, DRIVER_VERSION, sizeof(info->version)); 161 strncpy(info->fw_version, dev->driver_info->description, 162 sizeof(info->fw_version)); 163 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info)); 164 } 165 166 static u8 cdc_ncm_setup(struct cdc_ncm_ctx *ctx) 167 { 168 u32 val; 169 u8 flags; 170 u8 iface_no; 171 int err; 172 u16 ntb_fmt_supported; 173 174 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 175 176 err = usb_control_msg(ctx->udev, 177 usb_rcvctrlpipe(ctx->udev, 0), 178 USB_CDC_GET_NTB_PARAMETERS, 179 USB_TYPE_CLASS | USB_DIR_IN 180 | USB_RECIP_INTERFACE, 181 0, iface_no, &ctx->ncm_parm, 182 sizeof(ctx->ncm_parm), 10000); 183 if (err < 0) { 184 pr_debug("failed GET_NTB_PARAMETERS\n"); 185 return 1; 186 } 187 188 /* read correct set of parameters according to device mode */ 189 ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); 190 ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); 191 ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); 192 ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); 193 ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); 194 /* devices prior to NCM Errata shall set this field to zero */ 195 ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); 196 ntb_fmt_supported = le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported); 197 198 if (ctx->func_desc != NULL) 199 flags = ctx->func_desc->bmNetworkCapabilities; 200 else 201 flags = 0; 202 203 pr_debug("dwNtbInMaxSize=%u dwNtbOutMaxSize=%u " 204 "wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u " 205 "wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", 206 ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, 207 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, flags); 208 209 /* max count of tx datagrams */ 210 if ((ctx->tx_max_datagrams == 0) || 211 (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) 212 ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; 213 214 /* verify maximum size of received NTB in bytes */ 215 if (ctx->rx_max < USB_CDC_NCM_NTB_MIN_IN_SIZE) { 216 pr_debug("Using min receive length=%d\n", 217 USB_CDC_NCM_NTB_MIN_IN_SIZE); 218 ctx->rx_max = USB_CDC_NCM_NTB_MIN_IN_SIZE; 219 } 220 221 if (ctx->rx_max > CDC_NCM_NTB_MAX_SIZE_RX) { 222 pr_debug("Using default maximum receive length=%d\n", 223 CDC_NCM_NTB_MAX_SIZE_RX); 224 ctx->rx_max = CDC_NCM_NTB_MAX_SIZE_RX; 225 } 226 227 /* inform device about NTB input size changes */ 228 if (ctx->rx_max != le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)) { 229 230 if (flags & USB_CDC_NCM_NCAP_NTB_INPUT_SIZE) { 231 struct usb_cdc_ncm_ndp_input_size *ndp_in_sz; 232 233 ndp_in_sz = kzalloc(sizeof(*ndp_in_sz), GFP_KERNEL); 234 if (!ndp_in_sz) { 235 err = -ENOMEM; 236 goto size_err; 237 } 238 239 err = usb_control_msg(ctx->udev, 240 usb_sndctrlpipe(ctx->udev, 0), 241 USB_CDC_SET_NTB_INPUT_SIZE, 242 USB_TYPE_CLASS | USB_DIR_OUT 243 | USB_RECIP_INTERFACE, 244 0, iface_no, ndp_in_sz, 8, 1000); 245 kfree(ndp_in_sz); 246 } else { 247 __le32 *dwNtbInMaxSize; 248 dwNtbInMaxSize = kzalloc(sizeof(*dwNtbInMaxSize), 249 GFP_KERNEL); 250 if (!dwNtbInMaxSize) { 251 err = -ENOMEM; 252 goto size_err; 253 } 254 *dwNtbInMaxSize = cpu_to_le32(ctx->rx_max); 255 256 err = usb_control_msg(ctx->udev, 257 usb_sndctrlpipe(ctx->udev, 0), 258 USB_CDC_SET_NTB_INPUT_SIZE, 259 USB_TYPE_CLASS | USB_DIR_OUT 260 | USB_RECIP_INTERFACE, 261 0, iface_no, dwNtbInMaxSize, 4, 1000); 262 kfree(dwNtbInMaxSize); 263 } 264 size_err: 265 if (err < 0) 266 pr_debug("Setting NTB Input Size failed\n"); 267 } 268 269 /* verify maximum size of transmitted NTB in bytes */ 270 if ((ctx->tx_max < 271 (CDC_NCM_MIN_HDR_SIZE + CDC_NCM_MIN_DATAGRAM_SIZE)) || 272 (ctx->tx_max > CDC_NCM_NTB_MAX_SIZE_TX)) { 273 pr_debug("Using default maximum transmit length=%d\n", 274 CDC_NCM_NTB_MAX_SIZE_TX); 275 ctx->tx_max = CDC_NCM_NTB_MAX_SIZE_TX; 276 } 277 278 /* 279 * verify that the structure alignment is: 280 * - power of two 281 * - not greater than the maximum transmit length 282 * - not less than four bytes 283 */ 284 val = ctx->tx_ndp_modulus; 285 286 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 287 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 288 pr_debug("Using default alignment: 4 bytes\n"); 289 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 290 } 291 292 /* 293 * verify that the payload alignment is: 294 * - power of two 295 * - not greater than the maximum transmit length 296 * - not less than four bytes 297 */ 298 val = ctx->tx_modulus; 299 300 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 301 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 302 pr_debug("Using default transmit modulus: 4 bytes\n"); 303 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 304 } 305 306 /* verify the payload remainder */ 307 if (ctx->tx_remainder >= ctx->tx_modulus) { 308 pr_debug("Using default transmit remainder: 0 bytes\n"); 309 ctx->tx_remainder = 0; 310 } 311 312 /* adjust TX-remainder according to NCM specification. */ 313 ctx->tx_remainder = ((ctx->tx_remainder - ETH_HLEN) & 314 (ctx->tx_modulus - 1)); 315 316 /* additional configuration */ 317 318 /* set CRC Mode */ 319 if (flags & USB_CDC_NCM_NCAP_CRC_MODE) { 320 err = usb_control_msg(ctx->udev, usb_sndctrlpipe(ctx->udev, 0), 321 USB_CDC_SET_CRC_MODE, 322 USB_TYPE_CLASS | USB_DIR_OUT 323 | USB_RECIP_INTERFACE, 324 USB_CDC_NCM_CRC_NOT_APPENDED, 325 iface_no, NULL, 0, 1000); 326 if (err < 0) 327 pr_debug("Setting CRC mode off failed\n"); 328 } 329 330 /* set NTB format, if both formats are supported */ 331 if (ntb_fmt_supported & USB_CDC_NCM_NTH32_SIGN) { 332 err = usb_control_msg(ctx->udev, usb_sndctrlpipe(ctx->udev, 0), 333 USB_CDC_SET_NTB_FORMAT, USB_TYPE_CLASS 334 | USB_DIR_OUT | USB_RECIP_INTERFACE, 335 USB_CDC_NCM_NTB16_FORMAT, 336 iface_no, NULL, 0, 1000); 337 if (err < 0) 338 pr_debug("Setting NTB format to 16-bit failed\n"); 339 } 340 341 ctx->max_datagram_size = CDC_NCM_MIN_DATAGRAM_SIZE; 342 343 /* set Max Datagram Size (MTU) */ 344 if (flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE) { 345 __le16 *max_datagram_size; 346 u16 eth_max_sz = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 347 348 max_datagram_size = kzalloc(sizeof(*max_datagram_size), 349 GFP_KERNEL); 350 if (!max_datagram_size) { 351 err = -ENOMEM; 352 goto max_dgram_err; 353 } 354 355 err = usb_control_msg(ctx->udev, usb_rcvctrlpipe(ctx->udev, 0), 356 USB_CDC_GET_MAX_DATAGRAM_SIZE, 357 USB_TYPE_CLASS | USB_DIR_IN 358 | USB_RECIP_INTERFACE, 359 0, iface_no, max_datagram_size, 360 2, 1000); 361 if (err < 0) { 362 pr_debug("GET_MAX_DATAGRAM_SIZE failed, use size=%u\n", 363 CDC_NCM_MIN_DATAGRAM_SIZE); 364 kfree(max_datagram_size); 365 } else { 366 ctx->max_datagram_size = 367 le16_to_cpu(*max_datagram_size); 368 /* Check Eth descriptor value */ 369 if (eth_max_sz < CDC_NCM_MAX_DATAGRAM_SIZE) { 370 if (ctx->max_datagram_size > eth_max_sz) 371 ctx->max_datagram_size = eth_max_sz; 372 } else { 373 if (ctx->max_datagram_size > 374 CDC_NCM_MAX_DATAGRAM_SIZE) 375 ctx->max_datagram_size = 376 CDC_NCM_MAX_DATAGRAM_SIZE; 377 } 378 379 if (ctx->max_datagram_size < CDC_NCM_MIN_DATAGRAM_SIZE) 380 ctx->max_datagram_size = 381 CDC_NCM_MIN_DATAGRAM_SIZE; 382 383 /* if value changed, update device */ 384 err = usb_control_msg(ctx->udev, 385 usb_sndctrlpipe(ctx->udev, 0), 386 USB_CDC_SET_MAX_DATAGRAM_SIZE, 387 USB_TYPE_CLASS | USB_DIR_OUT 388 | USB_RECIP_INTERFACE, 389 0, 390 iface_no, max_datagram_size, 391 2, 1000); 392 kfree(max_datagram_size); 393 max_dgram_err: 394 if (err < 0) 395 pr_debug("SET_MAX_DATAGRAM_SIZE failed\n"); 396 } 397 398 } 399 400 if (ctx->netdev->mtu != (ctx->max_datagram_size - ETH_HLEN)) 401 ctx->netdev->mtu = ctx->max_datagram_size - ETH_HLEN; 402 403 return 0; 404 } 405 406 static void 407 cdc_ncm_find_endpoints(struct cdc_ncm_ctx *ctx, struct usb_interface *intf) 408 { 409 struct usb_host_endpoint *e; 410 u8 ep; 411 412 for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { 413 414 e = intf->cur_altsetting->endpoint + ep; 415 switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 416 case USB_ENDPOINT_XFER_INT: 417 if (usb_endpoint_dir_in(&e->desc)) { 418 if (ctx->status_ep == NULL) 419 ctx->status_ep = e; 420 } 421 break; 422 423 case USB_ENDPOINT_XFER_BULK: 424 if (usb_endpoint_dir_in(&e->desc)) { 425 if (ctx->in_ep == NULL) 426 ctx->in_ep = e; 427 } else { 428 if (ctx->out_ep == NULL) 429 ctx->out_ep = e; 430 } 431 break; 432 433 default: 434 break; 435 } 436 } 437 } 438 439 static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) 440 { 441 if (ctx == NULL) 442 return; 443 444 del_timer_sync(&ctx->tx_timer); 445 446 if (ctx->tx_rem_skb != NULL) { 447 dev_kfree_skb_any(ctx->tx_rem_skb); 448 ctx->tx_rem_skb = NULL; 449 } 450 451 if (ctx->tx_curr_skb != NULL) { 452 dev_kfree_skb_any(ctx->tx_curr_skb); 453 ctx->tx_curr_skb = NULL; 454 } 455 456 kfree(ctx); 457 } 458 459 static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) 460 { 461 struct cdc_ncm_ctx *ctx; 462 struct usb_driver *driver; 463 u8 *buf; 464 int len; 465 int temp; 466 u8 iface_no; 467 468 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); 469 if (ctx == NULL) 470 return -ENODEV; 471 472 memset(ctx, 0, sizeof(*ctx)); 473 474 init_timer(&ctx->tx_timer); 475 spin_lock_init(&ctx->mtx); 476 ctx->netdev = dev->net; 477 478 /* store ctx pointer in device data field */ 479 dev->data[0] = (unsigned long)ctx; 480 481 /* get some pointers */ 482 driver = driver_of(intf); 483 buf = intf->cur_altsetting->extra; 484 len = intf->cur_altsetting->extralen; 485 486 ctx->udev = dev->udev; 487 ctx->intf = intf; 488 489 /* parse through descriptors associated with control interface */ 490 while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) { 491 492 if (buf[1] != USB_DT_CS_INTERFACE) 493 goto advance; 494 495 switch (buf[2]) { 496 case USB_CDC_UNION_TYPE: 497 if (buf[0] < sizeof(*(ctx->union_desc))) 498 break; 499 500 ctx->union_desc = 501 (const struct usb_cdc_union_desc *)buf; 502 503 ctx->control = usb_ifnum_to_if(dev->udev, 504 ctx->union_desc->bMasterInterface0); 505 ctx->data = usb_ifnum_to_if(dev->udev, 506 ctx->union_desc->bSlaveInterface0); 507 break; 508 509 case USB_CDC_ETHERNET_TYPE: 510 if (buf[0] < sizeof(*(ctx->ether_desc))) 511 break; 512 513 ctx->ether_desc = 514 (const struct usb_cdc_ether_desc *)buf; 515 dev->hard_mtu = 516 le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 517 518 if (dev->hard_mtu < CDC_NCM_MIN_DATAGRAM_SIZE) 519 dev->hard_mtu = CDC_NCM_MIN_DATAGRAM_SIZE; 520 else if (dev->hard_mtu > CDC_NCM_MAX_DATAGRAM_SIZE) 521 dev->hard_mtu = CDC_NCM_MAX_DATAGRAM_SIZE; 522 break; 523 524 case USB_CDC_NCM_TYPE: 525 if (buf[0] < sizeof(*(ctx->func_desc))) 526 break; 527 528 ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf; 529 break; 530 531 default: 532 break; 533 } 534 advance: 535 /* advance to next descriptor */ 536 temp = buf[0]; 537 buf += temp; 538 len -= temp; 539 } 540 541 /* check if we got everything */ 542 if ((ctx->control == NULL) || (ctx->data == NULL) || 543 (ctx->ether_desc == NULL) || (ctx->control != intf)) 544 goto error; 545 546 /* claim interfaces, if any */ 547 temp = usb_driver_claim_interface(driver, ctx->data, dev); 548 if (temp) 549 goto error; 550 551 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; 552 553 /* reset data interface */ 554 temp = usb_set_interface(dev->udev, iface_no, 0); 555 if (temp) 556 goto error2; 557 558 /* initialize data interface */ 559 if (cdc_ncm_setup(ctx)) 560 goto error2; 561 562 /* configure data interface */ 563 temp = usb_set_interface(dev->udev, iface_no, 1); 564 if (temp) 565 goto error2; 566 567 cdc_ncm_find_endpoints(ctx, ctx->data); 568 cdc_ncm_find_endpoints(ctx, ctx->control); 569 570 if ((ctx->in_ep == NULL) || (ctx->out_ep == NULL) || 571 (ctx->status_ep == NULL)) 572 goto error2; 573 574 dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; 575 576 usb_set_intfdata(ctx->data, dev); 577 usb_set_intfdata(ctx->control, dev); 578 usb_set_intfdata(ctx->intf, dev); 579 580 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); 581 if (temp) 582 goto error2; 583 584 dev_info(&dev->udev->dev, "MAC-Address: " 585 "0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n", 586 dev->net->dev_addr[0], dev->net->dev_addr[1], 587 dev->net->dev_addr[2], dev->net->dev_addr[3], 588 dev->net->dev_addr[4], dev->net->dev_addr[5]); 589 590 dev->in = usb_rcvbulkpipe(dev->udev, 591 ctx->in_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); 592 dev->out = usb_sndbulkpipe(dev->udev, 593 ctx->out_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); 594 dev->status = ctx->status_ep; 595 dev->rx_urb_size = ctx->rx_max; 596 597 /* 598 * We should get an event when network connection is "connected" or 599 * "disconnected". Set network connection in "disconnected" state 600 * (carrier is OFF) during attach, so the IP network stack does not 601 * start IPv6 negotiation and more. 602 */ 603 netif_carrier_off(dev->net); 604 ctx->tx_speed = ctx->rx_speed = 0; 605 return 0; 606 607 error2: 608 usb_set_intfdata(ctx->control, NULL); 609 usb_set_intfdata(ctx->data, NULL); 610 usb_driver_release_interface(driver, ctx->data); 611 error: 612 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); 613 dev->data[0] = 0; 614 dev_info(&dev->udev->dev, "bind() failure\n"); 615 return -ENODEV; 616 } 617 618 static void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) 619 { 620 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 621 struct usb_driver *driver = driver_of(intf); 622 623 if (ctx == NULL) 624 return; /* no setup */ 625 626 /* disconnect master --> disconnect slave */ 627 if (intf == ctx->control && ctx->data) { 628 usb_set_intfdata(ctx->data, NULL); 629 usb_driver_release_interface(driver, ctx->data); 630 ctx->data = NULL; 631 632 } else if (intf == ctx->data && ctx->control) { 633 usb_set_intfdata(ctx->control, NULL); 634 usb_driver_release_interface(driver, ctx->control); 635 ctx->control = NULL; 636 } 637 638 usb_set_intfdata(ctx->intf, NULL); 639 cdc_ncm_free(ctx); 640 } 641 642 static void cdc_ncm_zero_fill(u8 *ptr, u32 first, u32 end, u32 max) 643 { 644 if (first >= max) 645 return; 646 if (first >= end) 647 return; 648 if (end > max) 649 end = max; 650 memset(ptr + first, 0, end - first); 651 } 652 653 static struct sk_buff * 654 cdc_ncm_fill_tx_frame(struct cdc_ncm_ctx *ctx, struct sk_buff *skb) 655 { 656 struct sk_buff *skb_out; 657 u32 rem; 658 u32 offset; 659 u32 last_offset; 660 u16 n = 0, index; 661 u8 ready2send = 0; 662 663 /* if there is a remaining skb, it gets priority */ 664 if (skb != NULL) 665 swap(skb, ctx->tx_rem_skb); 666 else 667 ready2send = 1; 668 669 /* 670 * +----------------+ 671 * | skb_out | 672 * +----------------+ 673 * ^ offset 674 * ^ last_offset 675 */ 676 677 /* check if we are resuming an OUT skb */ 678 if (ctx->tx_curr_skb != NULL) { 679 /* pop variables */ 680 skb_out = ctx->tx_curr_skb; 681 offset = ctx->tx_curr_offset; 682 last_offset = ctx->tx_curr_last_offset; 683 n = ctx->tx_curr_frame_num; 684 685 } else { 686 /* reset variables */ 687 skb_out = alloc_skb((ctx->tx_max + 1), GFP_ATOMIC); 688 if (skb_out == NULL) { 689 if (skb != NULL) { 690 dev_kfree_skb_any(skb); 691 ctx->netdev->stats.tx_dropped++; 692 } 693 goto exit_no_skb; 694 } 695 696 /* make room for NTH and NDP */ 697 offset = ALIGN(sizeof(struct usb_cdc_ncm_nth16), 698 ctx->tx_ndp_modulus) + 699 sizeof(struct usb_cdc_ncm_ndp16) + 700 (ctx->tx_max_datagrams + 1) * 701 sizeof(struct usb_cdc_ncm_dpe16); 702 703 /* store last valid offset before alignment */ 704 last_offset = offset; 705 /* align first Datagram offset correctly */ 706 offset = ALIGN(offset, ctx->tx_modulus) + ctx->tx_remainder; 707 /* zero buffer till the first IP datagram */ 708 cdc_ncm_zero_fill(skb_out->data, 0, offset, offset); 709 n = 0; 710 ctx->tx_curr_frame_num = 0; 711 } 712 713 for (; n < ctx->tx_max_datagrams; n++) { 714 /* check if end of transmit buffer is reached */ 715 if (offset >= ctx->tx_max) { 716 ready2send = 1; 717 break; 718 } 719 /* compute maximum buffer size */ 720 rem = ctx->tx_max - offset; 721 722 if (skb == NULL) { 723 skb = ctx->tx_rem_skb; 724 ctx->tx_rem_skb = NULL; 725 726 /* check for end of skb */ 727 if (skb == NULL) 728 break; 729 } 730 731 if (skb->len > rem) { 732 if (n == 0) { 733 /* won't fit, MTU problem? */ 734 dev_kfree_skb_any(skb); 735 skb = NULL; 736 ctx->netdev->stats.tx_dropped++; 737 } else { 738 /* no room for skb - store for later */ 739 if (ctx->tx_rem_skb != NULL) { 740 dev_kfree_skb_any(ctx->tx_rem_skb); 741 ctx->netdev->stats.tx_dropped++; 742 } 743 ctx->tx_rem_skb = skb; 744 skb = NULL; 745 ready2send = 1; 746 } 747 break; 748 } 749 750 memcpy(((u8 *)skb_out->data) + offset, skb->data, skb->len); 751 752 ctx->tx_ncm.dpe16[n].wDatagramLength = cpu_to_le16(skb->len); 753 ctx->tx_ncm.dpe16[n].wDatagramIndex = cpu_to_le16(offset); 754 755 /* update offset */ 756 offset += skb->len; 757 758 /* store last valid offset before alignment */ 759 last_offset = offset; 760 761 /* align offset correctly */ 762 offset = ALIGN(offset, ctx->tx_modulus) + ctx->tx_remainder; 763 764 /* zero padding */ 765 cdc_ncm_zero_fill(skb_out->data, last_offset, offset, 766 ctx->tx_max); 767 dev_kfree_skb_any(skb); 768 skb = NULL; 769 } 770 771 /* free up any dangling skb */ 772 if (skb != NULL) { 773 dev_kfree_skb_any(skb); 774 skb = NULL; 775 ctx->netdev->stats.tx_dropped++; 776 } 777 778 ctx->tx_curr_frame_num = n; 779 780 if (n == 0) { 781 /* wait for more frames */ 782 /* push variables */ 783 ctx->tx_curr_skb = skb_out; 784 ctx->tx_curr_offset = offset; 785 ctx->tx_curr_last_offset = last_offset; 786 goto exit_no_skb; 787 788 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) { 789 /* wait for more frames */ 790 /* push variables */ 791 ctx->tx_curr_skb = skb_out; 792 ctx->tx_curr_offset = offset; 793 ctx->tx_curr_last_offset = last_offset; 794 /* set the pending count */ 795 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) 796 ctx->tx_timer_pending = 2; 797 goto exit_no_skb; 798 799 } else { 800 /* frame goes out */ 801 /* variables will be reset at next call */ 802 } 803 804 /* check for overflow */ 805 if (last_offset > ctx->tx_max) 806 last_offset = ctx->tx_max; 807 808 /* revert offset */ 809 offset = last_offset; 810 811 /* 812 * If collected data size is less or equal CDC_NCM_MIN_TX_PKT bytes, 813 * we send buffers as it is. If we get more data, it would be more 814 * efficient for USB HS mobile device with DMA engine to receive a full 815 * size NTB, than canceling DMA transfer and receiving a short packet. 816 */ 817 if (offset > CDC_NCM_MIN_TX_PKT) 818 offset = ctx->tx_max; 819 820 /* final zero padding */ 821 cdc_ncm_zero_fill(skb_out->data, last_offset, offset, ctx->tx_max); 822 823 /* store last offset */ 824 last_offset = offset; 825 826 if (((last_offset < ctx->tx_max) && ((last_offset % 827 le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0)) || 828 (((last_offset == ctx->tx_max) && ((ctx->tx_max % 829 le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0)) && 830 (ctx->tx_max < le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)))) { 831 /* force short packet */ 832 *(((u8 *)skb_out->data) + last_offset) = 0; 833 last_offset++; 834 } 835 836 /* zero the rest of the DPEs plus the last NULL entry */ 837 for (; n <= CDC_NCM_DPT_DATAGRAMS_MAX; n++) { 838 ctx->tx_ncm.dpe16[n].wDatagramLength = 0; 839 ctx->tx_ncm.dpe16[n].wDatagramIndex = 0; 840 } 841 842 /* fill out 16-bit NTB header */ 843 ctx->tx_ncm.nth16.dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); 844 ctx->tx_ncm.nth16.wHeaderLength = 845 cpu_to_le16(sizeof(ctx->tx_ncm.nth16)); 846 ctx->tx_ncm.nth16.wSequence = cpu_to_le16(ctx->tx_seq); 847 ctx->tx_ncm.nth16.wBlockLength = cpu_to_le16(last_offset); 848 index = ALIGN(sizeof(struct usb_cdc_ncm_nth16), ctx->tx_ndp_modulus); 849 ctx->tx_ncm.nth16.wNdpIndex = cpu_to_le16(index); 850 851 memcpy(skb_out->data, &(ctx->tx_ncm.nth16), sizeof(ctx->tx_ncm.nth16)); 852 ctx->tx_seq++; 853 854 /* fill out 16-bit NDP table */ 855 ctx->tx_ncm.ndp16.dwSignature = 856 cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN); 857 rem = sizeof(ctx->tx_ncm.ndp16) + ((ctx->tx_curr_frame_num + 1) * 858 sizeof(struct usb_cdc_ncm_dpe16)); 859 ctx->tx_ncm.ndp16.wLength = cpu_to_le16(rem); 860 ctx->tx_ncm.ndp16.wNextNdpIndex = 0; /* reserved */ 861 862 memcpy(((u8 *)skb_out->data) + index, 863 &(ctx->tx_ncm.ndp16), 864 sizeof(ctx->tx_ncm.ndp16)); 865 866 memcpy(((u8 *)skb_out->data) + index + sizeof(ctx->tx_ncm.ndp16), 867 &(ctx->tx_ncm.dpe16), 868 (ctx->tx_curr_frame_num + 1) * 869 sizeof(struct usb_cdc_ncm_dpe16)); 870 871 /* set frame length */ 872 skb_put(skb_out, last_offset); 873 874 /* return skb */ 875 ctx->tx_curr_skb = NULL; 876 return skb_out; 877 878 exit_no_skb: 879 return NULL; 880 } 881 882 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) 883 { 884 /* start timer, if not already started */ 885 if (timer_pending(&ctx->tx_timer) == 0) { 886 ctx->tx_timer.function = &cdc_ncm_tx_timeout; 887 ctx->tx_timer.data = (unsigned long)ctx; 888 ctx->tx_timer.expires = jiffies + ((HZ + 999) / 1000); 889 add_timer(&ctx->tx_timer); 890 } 891 } 892 893 static void cdc_ncm_tx_timeout(unsigned long arg) 894 { 895 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)arg; 896 u8 restart; 897 898 spin_lock(&ctx->mtx); 899 if (ctx->tx_timer_pending != 0) { 900 ctx->tx_timer_pending--; 901 restart = 1; 902 } else { 903 restart = 0; 904 } 905 906 spin_unlock(&ctx->mtx); 907 908 if (restart) { 909 spin_lock(&ctx->mtx); 910 cdc_ncm_tx_timeout_start(ctx); 911 spin_unlock(&ctx->mtx); 912 } else if (ctx->netdev != NULL) { 913 usbnet_start_xmit(NULL, ctx->netdev); 914 } 915 } 916 917 static struct sk_buff * 918 cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 919 { 920 struct sk_buff *skb_out; 921 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 922 u8 need_timer = 0; 923 924 /* 925 * The Ethernet API we are using does not support transmitting 926 * multiple Ethernet frames in a single call. This driver will 927 * accumulate multiple Ethernet frames and send out a larger 928 * USB frame when the USB buffer is full or when a single jiffies 929 * timeout happens. 930 */ 931 if (ctx == NULL) 932 goto error; 933 934 spin_lock(&ctx->mtx); 935 skb_out = cdc_ncm_fill_tx_frame(ctx, skb); 936 if (ctx->tx_curr_skb != NULL) 937 need_timer = 1; 938 939 /* Start timer, if there is a remaining skb */ 940 if (need_timer) 941 cdc_ncm_tx_timeout_start(ctx); 942 943 if (skb_out) 944 dev->net->stats.tx_packets += ctx->tx_curr_frame_num; 945 946 spin_unlock(&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; 960 int sumlen; 961 int actlen; 962 int temp; 963 int nframes; 964 int x; 965 int offset; 966 967 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 968 if (ctx == NULL) 969 goto error; 970 971 actlen = skb_in->len; 972 sumlen = CDC_NCM_NTB_MAX_SIZE_RX; 973 974 if (actlen < (sizeof(ctx->rx_ncm.nth16) + sizeof(ctx->rx_ncm.ndp16))) { 975 pr_debug("frame too short\n"); 976 goto error; 977 } 978 979 memcpy(&(ctx->rx_ncm.nth16), ((u8 *)skb_in->data), 980 sizeof(ctx->rx_ncm.nth16)); 981 982 if (le32_to_cpu(ctx->rx_ncm.nth16.dwSignature) != 983 USB_CDC_NCM_NTH16_SIGN) { 984 pr_debug("invalid NTH16 signature <%u>\n", 985 le32_to_cpu(ctx->rx_ncm.nth16.dwSignature)); 986 goto error; 987 } 988 989 temp = le16_to_cpu(ctx->rx_ncm.nth16.wBlockLength); 990 if (temp > sumlen) { 991 pr_debug("unsupported NTB block length %u/%u\n", temp, sumlen); 992 goto error; 993 } 994 995 temp = le16_to_cpu(ctx->rx_ncm.nth16.wNdpIndex); 996 if ((temp + sizeof(ctx->rx_ncm.ndp16)) > actlen) { 997 pr_debug("invalid DPT16 index\n"); 998 goto error; 999 } 1000 1001 memcpy(&(ctx->rx_ncm.ndp16), ((u8 *)skb_in->data) + temp, 1002 sizeof(ctx->rx_ncm.ndp16)); 1003 1004 if (le32_to_cpu(ctx->rx_ncm.ndp16.dwSignature) != 1005 USB_CDC_NCM_NDP16_NOCRC_SIGN) { 1006 pr_debug("invalid DPT16 signature <%u>\n", 1007 le32_to_cpu(ctx->rx_ncm.ndp16.dwSignature)); 1008 goto error; 1009 } 1010 1011 if (le16_to_cpu(ctx->rx_ncm.ndp16.wLength) < 1012 USB_CDC_NCM_NDP16_LENGTH_MIN) { 1013 pr_debug("invalid DPT16 length <%u>\n", 1014 le32_to_cpu(ctx->rx_ncm.ndp16.dwSignature)); 1015 goto error; 1016 } 1017 1018 nframes = ((le16_to_cpu(ctx->rx_ncm.ndp16.wLength) - 1019 sizeof(struct usb_cdc_ncm_ndp16)) / 1020 sizeof(struct usb_cdc_ncm_dpe16)); 1021 nframes--; /* we process NDP entries except for the last one */ 1022 1023 pr_debug("nframes = %u\n", nframes); 1024 1025 temp += sizeof(ctx->rx_ncm.ndp16); 1026 1027 if ((temp + nframes * (sizeof(struct usb_cdc_ncm_dpe16))) > actlen) { 1028 pr_debug("Invalid nframes = %d\n", nframes); 1029 goto error; 1030 } 1031 1032 if (nframes > CDC_NCM_DPT_DATAGRAMS_MAX) { 1033 pr_debug("Truncating number of frames from %u to %u\n", 1034 nframes, CDC_NCM_DPT_DATAGRAMS_MAX); 1035 nframes = CDC_NCM_DPT_DATAGRAMS_MAX; 1036 } 1037 1038 memcpy(&(ctx->rx_ncm.dpe16), ((u8 *)skb_in->data) + temp, 1039 nframes * (sizeof(struct usb_cdc_ncm_dpe16))); 1040 1041 for (x = 0; x < nframes; x++) { 1042 offset = le16_to_cpu(ctx->rx_ncm.dpe16[x].wDatagramIndex); 1043 temp = le16_to_cpu(ctx->rx_ncm.dpe16[x].wDatagramLength); 1044 1045 /* 1046 * CDC NCM ch. 3.7 1047 * All entries after first NULL entry are to be ignored 1048 */ 1049 if ((offset == 0) || (temp == 0)) { 1050 if (!x) 1051 goto error; /* empty NTB */ 1052 break; 1053 } 1054 1055 /* sanity checking */ 1056 if (((offset + temp) > actlen) || 1057 (temp > CDC_NCM_MAX_DATAGRAM_SIZE) || (temp < ETH_HLEN)) { 1058 pr_debug("invalid frame detected (ignored)" 1059 "offset[%u]=%u, length=%u, skb=%p\n", 1060 x, offset, temp, skb_in); 1061 if (!x) 1062 goto error; 1063 break; 1064 1065 } else { 1066 skb = skb_clone(skb_in, GFP_ATOMIC); 1067 if (!skb) 1068 goto error; 1069 skb->len = temp; 1070 skb->data = ((u8 *)skb_in->data) + offset; 1071 skb_set_tail_pointer(skb, temp); 1072 usbnet_skb_return(dev, skb); 1073 } 1074 } 1075 return 1; 1076 error: 1077 return 0; 1078 } 1079 1080 static void 1081 cdc_ncm_speed_change(struct cdc_ncm_ctx *ctx, 1082 struct usb_cdc_speed_change *data) 1083 { 1084 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); 1085 uint32_t tx_speed = le32_to_cpu(data->ULBitRate); 1086 1087 /* 1088 * Currently the USB-NET API does not support reporting the actual 1089 * device speed. Do print it instead. 1090 */ 1091 if ((tx_speed != ctx->tx_speed) || (rx_speed != ctx->rx_speed)) { 1092 ctx->tx_speed = tx_speed; 1093 ctx->rx_speed = rx_speed; 1094 1095 if ((tx_speed > 1000000) && (rx_speed > 1000000)) { 1096 printk(KERN_INFO KBUILD_MODNAME 1097 ": %s: %u mbit/s downlink " 1098 "%u mbit/s uplink\n", 1099 ctx->netdev->name, 1100 (unsigned int)(rx_speed / 1000000U), 1101 (unsigned int)(tx_speed / 1000000U)); 1102 } else { 1103 printk(KERN_INFO KBUILD_MODNAME 1104 ": %s: %u kbit/s downlink " 1105 "%u kbit/s uplink\n", 1106 ctx->netdev->name, 1107 (unsigned int)(rx_speed / 1000U), 1108 (unsigned int)(tx_speed / 1000U)); 1109 } 1110 } 1111 } 1112 1113 static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) 1114 { 1115 struct cdc_ncm_ctx *ctx; 1116 struct usb_cdc_notification *event; 1117 1118 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1119 1120 if (urb->actual_length < sizeof(*event)) 1121 return; 1122 1123 /* test for split data in 8-byte chunks */ 1124 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { 1125 cdc_ncm_speed_change(ctx, 1126 (struct usb_cdc_speed_change *)urb->transfer_buffer); 1127 return; 1128 } 1129 1130 event = urb->transfer_buffer; 1131 1132 switch (event->bNotificationType) { 1133 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 1134 /* 1135 * According to the CDC NCM specification ch.7.1 1136 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be 1137 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. 1138 */ 1139 ctx->connected = event->wValue; 1140 1141 printk(KERN_INFO KBUILD_MODNAME ": %s: network connection:" 1142 " %sconnected\n", 1143 ctx->netdev->name, ctx->connected ? "" : "dis"); 1144 1145 if (ctx->connected) 1146 netif_carrier_on(dev->net); 1147 else { 1148 netif_carrier_off(dev->net); 1149 ctx->tx_speed = ctx->rx_speed = 0; 1150 } 1151 break; 1152 1153 case USB_CDC_NOTIFY_SPEED_CHANGE: 1154 if (urb->actual_length < (sizeof(*event) + 1155 sizeof(struct usb_cdc_speed_change))) 1156 set_bit(EVENT_STS_SPLIT, &dev->flags); 1157 else 1158 cdc_ncm_speed_change(ctx, 1159 (struct usb_cdc_speed_change *) &event[1]); 1160 break; 1161 1162 default: 1163 dev_err(&dev->udev->dev, "NCM: unexpected " 1164 "notification 0x%02x!\n", event->bNotificationType); 1165 break; 1166 } 1167 } 1168 1169 static int cdc_ncm_check_connect(struct usbnet *dev) 1170 { 1171 struct cdc_ncm_ctx *ctx; 1172 1173 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1174 if (ctx == NULL) 1175 return 1; /* disconnected */ 1176 1177 return !ctx->connected; 1178 } 1179 1180 static int 1181 cdc_ncm_probe(struct usb_interface *udev, const struct usb_device_id *prod) 1182 { 1183 return usbnet_probe(udev, prod); 1184 } 1185 1186 static void cdc_ncm_disconnect(struct usb_interface *intf) 1187 { 1188 struct usbnet *dev = usb_get_intfdata(intf); 1189 1190 if (dev == NULL) 1191 return; /* already disconnected */ 1192 1193 usbnet_disconnect(intf); 1194 } 1195 1196 static int cdc_ncm_manage_power(struct usbnet *dev, int status) 1197 { 1198 dev->intf->needs_remote_wakeup = status; 1199 return 0; 1200 } 1201 1202 static const struct driver_info cdc_ncm_info = { 1203 .description = "CDC NCM", 1204 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET, 1205 .bind = cdc_ncm_bind, 1206 .unbind = cdc_ncm_unbind, 1207 .check_connect = cdc_ncm_check_connect, 1208 .manage_power = cdc_ncm_manage_power, 1209 .status = cdc_ncm_status, 1210 .rx_fixup = cdc_ncm_rx_fixup, 1211 .tx_fixup = cdc_ncm_tx_fixup, 1212 }; 1213 1214 static struct usb_driver cdc_ncm_driver = { 1215 .name = "cdc_ncm", 1216 .id_table = cdc_devs, 1217 .probe = cdc_ncm_probe, 1218 .disconnect = cdc_ncm_disconnect, 1219 .suspend = usbnet_suspend, 1220 .resume = usbnet_resume, 1221 .reset_resume = usbnet_resume, 1222 .supports_autosuspend = 1, 1223 }; 1224 1225 static struct ethtool_ops cdc_ncm_ethtool_ops = { 1226 .get_drvinfo = cdc_ncm_get_drvinfo, 1227 .get_link = usbnet_get_link, 1228 .get_msglevel = usbnet_get_msglevel, 1229 .set_msglevel = usbnet_set_msglevel, 1230 .get_settings = usbnet_get_settings, 1231 .set_settings = usbnet_set_settings, 1232 .nway_reset = usbnet_nway_reset, 1233 }; 1234 1235 static int __init cdc_ncm_init(void) 1236 { 1237 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION "\n"); 1238 return usb_register(&cdc_ncm_driver); 1239 } 1240 1241 module_init(cdc_ncm_init); 1242 1243 static void __exit cdc_ncm_exit(void) 1244 { 1245 usb_deregister(&cdc_ncm_driver); 1246 } 1247 1248 module_exit(cdc_ncm_exit); 1249 1250 MODULE_AUTHOR("Hans Petter Selasky"); 1251 MODULE_DESCRIPTION("USB CDC NCM host driver"); 1252 MODULE_LICENSE("Dual BSD/GPL"); 1253