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 88struct 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 94struct 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 138static void cdc_ncm_txpath_bh(unsigned long param); 139static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); 140static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); 141static const struct driver_info cdc_ncm_info; 142static struct usb_driver cdc_ncm_driver; 143static const struct ethtool_ops cdc_ncm_ethtool_ops; 144 145static const struct usb_device_id cdc_devs[] = { 146 { USB_INTERFACE_INFO(USB_CLASS_COMM, 147 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 148 .driver_info = (unsigned long)&cdc_ncm_info, 149 }, 150 { 151 }, 152}; 153 154MODULE_DEVICE_TABLE(usb, cdc_devs); 155 156static void 157cdc_ncm_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 158{ 159 struct usbnet *dev = netdev_priv(net); 160 161 strncpy(info->driver, dev->driver_name, sizeof(info->driver)); 162 strncpy(info->version, DRIVER_VERSION, sizeof(info->version)); 163 strncpy(info->fw_version, dev->driver_info->description, 164 sizeof(info->fw_version)); 165 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info)); 166} 167 168static u8 cdc_ncm_setup(struct cdc_ncm_ctx *ctx) 169{ 170 u32 val; 171 u8 flags; 172 u8 iface_no; 173 int err; 174 u16 ntb_fmt_supported; 175 176 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 177 178 err = usb_control_msg(ctx->udev, 179 usb_rcvctrlpipe(ctx->udev, 0), 180 USB_CDC_GET_NTB_PARAMETERS, 181 USB_TYPE_CLASS | USB_DIR_IN 182 | USB_RECIP_INTERFACE, 183 0, iface_no, &ctx->ncm_parm, 184 sizeof(ctx->ncm_parm), 10000); 185 if (err < 0) { 186 pr_debug("failed GET_NTB_PARAMETERS\n"); 187 return 1; 188 } 189 190 /* read correct set of parameters according to device mode */ 191 ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); 192 ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); 193 ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); 194 ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); 195 ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); 196 /* devices prior to NCM Errata shall set this field to zero */ 197 ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); 198 ntb_fmt_supported = le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported); 199 200 if (ctx->func_desc != NULL) 201 flags = ctx->func_desc->bmNetworkCapabilities; 202 else 203 flags = 0; 204 205 pr_debug("dwNtbInMaxSize=%u dwNtbOutMaxSize=%u " 206 "wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u " 207 "wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", 208 ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, 209 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, flags); 210 211 /* max count of tx datagrams */ 212 if ((ctx->tx_max_datagrams == 0) || 213 (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) 214 ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; 215 216 /* verify maximum size of received NTB in bytes */ 217 if (ctx->rx_max < USB_CDC_NCM_NTB_MIN_IN_SIZE) { 218 pr_debug("Using min receive length=%d\n", 219 USB_CDC_NCM_NTB_MIN_IN_SIZE); 220 ctx->rx_max = USB_CDC_NCM_NTB_MIN_IN_SIZE; 221 } 222 223 if (ctx->rx_max > CDC_NCM_NTB_MAX_SIZE_RX) { 224 pr_debug("Using default maximum receive length=%d\n", 225 CDC_NCM_NTB_MAX_SIZE_RX); 226 ctx->rx_max = CDC_NCM_NTB_MAX_SIZE_RX; 227 } 228 229 /* inform device about NTB input size changes */ 230 if (ctx->rx_max != le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)) { 231 232 if (flags & USB_CDC_NCM_NCAP_NTB_INPUT_SIZE) { 233 struct usb_cdc_ncm_ndp_input_size *ndp_in_sz; 234 235 ndp_in_sz = kzalloc(sizeof(*ndp_in_sz), GFP_KERNEL); 236 if (!ndp_in_sz) { 237 err = -ENOMEM; 238 goto size_err; 239 } 240 241 err = usb_control_msg(ctx->udev, 242 usb_sndctrlpipe(ctx->udev, 0), 243 USB_CDC_SET_NTB_INPUT_SIZE, 244 USB_TYPE_CLASS | USB_DIR_OUT 245 | USB_RECIP_INTERFACE, 246 0, iface_no, ndp_in_sz, 8, 1000); 247 kfree(ndp_in_sz); 248 } else { 249 __le32 *dwNtbInMaxSize; 250 dwNtbInMaxSize = kzalloc(sizeof(*dwNtbInMaxSize), 251 GFP_KERNEL); 252 if (!dwNtbInMaxSize) { 253 err = -ENOMEM; 254 goto size_err; 255 } 256 *dwNtbInMaxSize = cpu_to_le32(ctx->rx_max); 257 258 err = usb_control_msg(ctx->udev, 259 usb_sndctrlpipe(ctx->udev, 0), 260 USB_CDC_SET_NTB_INPUT_SIZE, 261 USB_TYPE_CLASS | USB_DIR_OUT 262 | USB_RECIP_INTERFACE, 263 0, iface_no, dwNtbInMaxSize, 4, 1000); 264 kfree(dwNtbInMaxSize); 265 } 266size_err: 267 if (err < 0) 268 pr_debug("Setting NTB Input Size failed\n"); 269 } 270 271 /* verify maximum size of transmitted NTB in bytes */ 272 if ((ctx->tx_max < 273 (CDC_NCM_MIN_HDR_SIZE + CDC_NCM_MIN_DATAGRAM_SIZE)) || 274 (ctx->tx_max > CDC_NCM_NTB_MAX_SIZE_TX)) { 275 pr_debug("Using default maximum transmit length=%d\n", 276 CDC_NCM_NTB_MAX_SIZE_TX); 277 ctx->tx_max = CDC_NCM_NTB_MAX_SIZE_TX; 278 } 279 280 /* 281 * verify that the structure alignment is: 282 * - power of two 283 * - not greater than the maximum transmit length 284 * - not less than four bytes 285 */ 286 val = ctx->tx_ndp_modulus; 287 288 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 289 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 290 pr_debug("Using default alignment: 4 bytes\n"); 291 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 292 } 293 294 /* 295 * verify that the payload alignment is: 296 * - power of two 297 * - not greater than the maximum transmit length 298 * - not less than four bytes 299 */ 300 val = ctx->tx_modulus; 301 302 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 303 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 304 pr_debug("Using default transmit modulus: 4 bytes\n"); 305 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 306 } 307 308 /* verify the payload remainder */ 309 if (ctx->tx_remainder >= ctx->tx_modulus) { 310 pr_debug("Using default transmit remainder: 0 bytes\n"); 311 ctx->tx_remainder = 0; 312 } 313 314 /* adjust TX-remainder according to NCM specification. */ 315 ctx->tx_remainder = ((ctx->tx_remainder - ETH_HLEN) & 316 (ctx->tx_modulus - 1)); 317 318 /* additional configuration */ 319 320 /* set CRC Mode */ 321 if (flags & USB_CDC_NCM_NCAP_CRC_MODE) { 322 err = usb_control_msg(ctx->udev, usb_sndctrlpipe(ctx->udev, 0), 323 USB_CDC_SET_CRC_MODE, 324 USB_TYPE_CLASS | USB_DIR_OUT 325 | USB_RECIP_INTERFACE, 326 USB_CDC_NCM_CRC_NOT_APPENDED, 327 iface_no, NULL, 0, 1000); 328 if (err < 0) 329 pr_debug("Setting CRC mode off failed\n"); 330 } 331 332 /* set NTB format, if both formats are supported */ 333 if (ntb_fmt_supported & USB_CDC_NCM_NTH32_SIGN) { 334 err = usb_control_msg(ctx->udev, usb_sndctrlpipe(ctx->udev, 0), 335 USB_CDC_SET_NTB_FORMAT, USB_TYPE_CLASS 336 | USB_DIR_OUT | USB_RECIP_INTERFACE, 337 USB_CDC_NCM_NTB16_FORMAT, 338 iface_no, NULL, 0, 1000); 339 if (err < 0) 340 pr_debug("Setting NTB format to 16-bit failed\n"); 341 } 342 343 ctx->max_datagram_size = CDC_NCM_MIN_DATAGRAM_SIZE; 344 345 /* set Max Datagram Size (MTU) */ 346 if (flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE) { 347 __le16 *max_datagram_size; 348 u16 eth_max_sz = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 349 350 max_datagram_size = kzalloc(sizeof(*max_datagram_size), 351 GFP_KERNEL); 352 if (!max_datagram_size) { 353 err = -ENOMEM; 354 goto max_dgram_err; 355 } 356 357 err = usb_control_msg(ctx->udev, usb_rcvctrlpipe(ctx->udev, 0), 358 USB_CDC_GET_MAX_DATAGRAM_SIZE, 359 USB_TYPE_CLASS | USB_DIR_IN 360 | USB_RECIP_INTERFACE, 361 0, iface_no, max_datagram_size, 362 2, 1000); 363 if (err < 0) { 364 pr_debug("GET_MAX_DATAGRAM_SIZE failed, use size=%u\n", 365 CDC_NCM_MIN_DATAGRAM_SIZE); 366 } else { 367 ctx->max_datagram_size = 368 le16_to_cpu(*max_datagram_size); 369 /* Check Eth descriptor value */ 370 if (ctx->max_datagram_size > eth_max_sz) 371 ctx->max_datagram_size = eth_max_sz; 372 373 if (ctx->max_datagram_size > CDC_NCM_MAX_DATAGRAM_SIZE) 374 ctx->max_datagram_size = 375 CDC_NCM_MAX_DATAGRAM_SIZE; 376 377 if (ctx->max_datagram_size < CDC_NCM_MIN_DATAGRAM_SIZE) 378 ctx->max_datagram_size = 379 CDC_NCM_MIN_DATAGRAM_SIZE; 380 381 /* if value changed, update device */ 382 if (ctx->max_datagram_size != 383 le16_to_cpu(*max_datagram_size)) { 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 if (err < 0) 393 pr_debug("SET_MAX_DGRAM_SIZE failed\n"); 394 } 395 } 396 kfree(max_datagram_size); 397 } 398 399max_dgram_err: 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 406static void 407cdc_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 439static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) 440{ 441 if (ctx == NULL) 442 return; 443 444 if (ctx->tx_rem_skb != NULL) { 445 dev_kfree_skb_any(ctx->tx_rem_skb); 446 ctx->tx_rem_skb = NULL; 447 } 448 449 if (ctx->tx_curr_skb != NULL) { 450 dev_kfree_skb_any(ctx->tx_curr_skb); 451 ctx->tx_curr_skb = NULL; 452 } 453 454 kfree(ctx); 455} 456 457static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) 458{ 459 struct cdc_ncm_ctx *ctx; 460 struct usb_driver *driver; 461 u8 *buf; 462 int len; 463 int temp; 464 u8 iface_no; 465 466 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 467 if (ctx == NULL) 468 return -ENODEV; 469 470 hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 471 ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; 472 ctx->bh.data = (unsigned long)ctx; 473 ctx->bh.func = cdc_ncm_txpath_bh; 474 atomic_set(&ctx->stop, 0); 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 } 534advance: 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: %pM\n", dev->net->dev_addr); 585 586 dev->in = usb_rcvbulkpipe(dev->udev, 587 ctx->in_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); 588 dev->out = usb_sndbulkpipe(dev->udev, 589 ctx->out_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); 590 dev->status = ctx->status_ep; 591 dev->rx_urb_size = ctx->rx_max; 592 593 /* 594 * We should get an event when network connection is "connected" or 595 * "disconnected". Set network connection in "disconnected" state 596 * (carrier is OFF) during attach, so the IP network stack does not 597 * start IPv6 negotiation and more. 598 */ 599 netif_carrier_off(dev->net); 600 ctx->tx_speed = ctx->rx_speed = 0; 601 return 0; 602 603error2: 604 usb_set_intfdata(ctx->control, NULL); 605 usb_set_intfdata(ctx->data, NULL); 606 usb_driver_release_interface(driver, ctx->data); 607error: 608 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); 609 dev->data[0] = 0; 610 dev_info(&dev->udev->dev, "bind() failure\n"); 611 return -ENODEV; 612} 613 614static void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) 615{ 616 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 617 struct usb_driver *driver = driver_of(intf); 618 619 if (ctx == NULL) 620 return; /* no setup */ 621 622 atomic_set(&ctx->stop, 1); 623 624 if (hrtimer_active(&ctx->tx_timer)) 625 hrtimer_cancel(&ctx->tx_timer); 626 627 tasklet_kill(&ctx->bh); 628 629 /* disconnect master --> disconnect slave */ 630 if (intf == ctx->control && ctx->data) { 631 usb_set_intfdata(ctx->data, NULL); 632 usb_driver_release_interface(driver, ctx->data); 633 ctx->data = NULL; 634 635 } else if (intf == ctx->data && ctx->control) { 636 usb_set_intfdata(ctx->control, NULL); 637 usb_driver_release_interface(driver, ctx->control); 638 ctx->control = NULL; 639 } 640 641 usb_set_intfdata(ctx->intf, NULL); 642 cdc_ncm_free(ctx); 643} 644 645static void cdc_ncm_zero_fill(u8 *ptr, u32 first, u32 end, u32 max) 646{ 647 if (first >= max) 648 return; 649 if (first >= end) 650 return; 651 if (end > max) 652 end = max; 653 memset(ptr + first, 0, end - first); 654} 655 656static struct sk_buff * 657cdc_ncm_fill_tx_frame(struct cdc_ncm_ctx *ctx, struct sk_buff *skb) 658{ 659 struct sk_buff *skb_out; 660 u32 rem; 661 u32 offset; 662 u32 last_offset; 663 u16 n = 0, index; 664 u8 ready2send = 0; 665 666 /* if there is a remaining skb, it gets priority */ 667 if (skb != NULL) 668 swap(skb, ctx->tx_rem_skb); 669 else 670 ready2send = 1; 671 672 /* 673 * +----------------+ 674 * | skb_out | 675 * +----------------+ 676 * ^ offset 677 * ^ last_offset 678 */ 679 680 /* check if we are resuming an OUT skb */ 681 if (ctx->tx_curr_skb != NULL) { 682 /* pop variables */ 683 skb_out = ctx->tx_curr_skb; 684 offset = ctx->tx_curr_offset; 685 last_offset = ctx->tx_curr_last_offset; 686 n = ctx->tx_curr_frame_num; 687 688 } else { 689 /* reset variables */ 690 skb_out = alloc_skb((ctx->tx_max + 1), GFP_ATOMIC); 691 if (skb_out == NULL) { 692 if (skb != NULL) { 693 dev_kfree_skb_any(skb); 694 ctx->netdev->stats.tx_dropped++; 695 } 696 goto exit_no_skb; 697 } 698 699 /* make room for NTH and NDP */ 700 offset = ALIGN(sizeof(struct usb_cdc_ncm_nth16), 701 ctx->tx_ndp_modulus) + 702 sizeof(struct usb_cdc_ncm_ndp16) + 703 (ctx->tx_max_datagrams + 1) * 704 sizeof(struct usb_cdc_ncm_dpe16); 705 706 /* store last valid offset before alignment */ 707 last_offset = offset; 708 /* align first Datagram offset correctly */ 709 offset = ALIGN(offset, ctx->tx_modulus) + ctx->tx_remainder; 710 /* zero buffer till the first IP datagram */ 711 cdc_ncm_zero_fill(skb_out->data, 0, offset, offset); 712 n = 0; 713 ctx->tx_curr_frame_num = 0; 714 } 715 716 for (; n < ctx->tx_max_datagrams; n++) { 717 /* check if end of transmit buffer is reached */ 718 if (offset >= ctx->tx_max) { 719 ready2send = 1; 720 break; 721 } 722 /* compute maximum buffer size */ 723 rem = ctx->tx_max - offset; 724 725 if (skb == NULL) { 726 skb = ctx->tx_rem_skb; 727 ctx->tx_rem_skb = NULL; 728 729 /* check for end of skb */ 730 if (skb == NULL) 731 break; 732 } 733 734 if (skb->len > rem) { 735 if (n == 0) { 736 /* won't fit, MTU problem? */ 737 dev_kfree_skb_any(skb); 738 skb = NULL; 739 ctx->netdev->stats.tx_dropped++; 740 } else { 741 /* no room for skb - store for later */ 742 if (ctx->tx_rem_skb != NULL) { 743 dev_kfree_skb_any(ctx->tx_rem_skb); 744 ctx->netdev->stats.tx_dropped++; 745 } 746 ctx->tx_rem_skb = skb; 747 skb = NULL; 748 ready2send = 1; 749 } 750 break; 751 } 752 753 memcpy(((u8 *)skb_out->data) + offset, skb->data, skb->len); 754 755 ctx->tx_ncm.dpe16[n].wDatagramLength = cpu_to_le16(skb->len); 756 ctx->tx_ncm.dpe16[n].wDatagramIndex = cpu_to_le16(offset); 757 758 /* update offset */ 759 offset += skb->len; 760 761 /* store last valid offset before alignment */ 762 last_offset = offset; 763 764 /* align offset correctly */ 765 offset = ALIGN(offset, ctx->tx_modulus) + ctx->tx_remainder; 766 767 /* zero padding */ 768 cdc_ncm_zero_fill(skb_out->data, last_offset, offset, 769 ctx->tx_max); 770 dev_kfree_skb_any(skb); 771 skb = NULL; 772 } 773 774 /* free up any dangling skb */ 775 if (skb != NULL) { 776 dev_kfree_skb_any(skb); 777 skb = NULL; 778 ctx->netdev->stats.tx_dropped++; 779 } 780 781 ctx->tx_curr_frame_num = n; 782 783 if (n == 0) { 784 /* wait for more frames */ 785 /* push variables */ 786 ctx->tx_curr_skb = skb_out; 787 ctx->tx_curr_offset = offset; 788 ctx->tx_curr_last_offset = last_offset; 789 goto exit_no_skb; 790 791 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) { 792 /* wait for more frames */ 793 /* push variables */ 794 ctx->tx_curr_skb = skb_out; 795 ctx->tx_curr_offset = offset; 796 ctx->tx_curr_last_offset = last_offset; 797 /* set the pending count */ 798 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) 799 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; 800 goto exit_no_skb; 801 802 } else { 803 /* frame goes out */ 804 /* variables will be reset at next call */ 805 } 806 807 /* check for overflow */ 808 if (last_offset > ctx->tx_max) 809 last_offset = ctx->tx_max; 810 811 /* revert offset */ 812 offset = last_offset; 813 814 /* 815 * If collected data size is less or equal CDC_NCM_MIN_TX_PKT bytes, 816 * we send buffers as it is. If we get more data, it would be more 817 * efficient for USB HS mobile device with DMA engine to receive a full 818 * size NTB, than canceling DMA transfer and receiving a short packet. 819 */ 820 if (offset > CDC_NCM_MIN_TX_PKT) 821 offset = ctx->tx_max; 822 823 /* final zero padding */ 824 cdc_ncm_zero_fill(skb_out->data, last_offset, offset, ctx->tx_max); 825 826 /* store last offset */ 827 last_offset = offset; 828 829 if (((last_offset < ctx->tx_max) && ((last_offset % 830 le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0)) || 831 (((last_offset == ctx->tx_max) && ((ctx->tx_max % 832 le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0)) && 833 (ctx->tx_max < le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)))) { 834 /* force short packet */ 835 *(((u8 *)skb_out->data) + last_offset) = 0; 836 last_offset++; 837 } 838 839 /* zero the rest of the DPEs plus the last NULL entry */ 840 for (; n <= CDC_NCM_DPT_DATAGRAMS_MAX; n++) { 841 ctx->tx_ncm.dpe16[n].wDatagramLength = 0; 842 ctx->tx_ncm.dpe16[n].wDatagramIndex = 0; 843 } 844 845 /* fill out 16-bit NTB header */ 846 ctx->tx_ncm.nth16.dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); 847 ctx->tx_ncm.nth16.wHeaderLength = 848 cpu_to_le16(sizeof(ctx->tx_ncm.nth16)); 849 ctx->tx_ncm.nth16.wSequence = cpu_to_le16(ctx->tx_seq); 850 ctx->tx_ncm.nth16.wBlockLength = cpu_to_le16(last_offset); 851 index = ALIGN(sizeof(struct usb_cdc_ncm_nth16), ctx->tx_ndp_modulus); 852 ctx->tx_ncm.nth16.wNdpIndex = cpu_to_le16(index); 853 854 memcpy(skb_out->data, &(ctx->tx_ncm.nth16), sizeof(ctx->tx_ncm.nth16)); 855 ctx->tx_seq++; 856 857 /* fill out 16-bit NDP table */ 858 ctx->tx_ncm.ndp16.dwSignature = 859 cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN); 860 rem = sizeof(ctx->tx_ncm.ndp16) + ((ctx->tx_curr_frame_num + 1) * 861 sizeof(struct usb_cdc_ncm_dpe16)); 862 ctx->tx_ncm.ndp16.wLength = cpu_to_le16(rem); 863 ctx->tx_ncm.ndp16.wNextNdpIndex = 0; /* reserved */ 864 865 memcpy(((u8 *)skb_out->data) + index, 866 &(ctx->tx_ncm.ndp16), 867 sizeof(ctx->tx_ncm.ndp16)); 868 869 memcpy(((u8 *)skb_out->data) + index + sizeof(ctx->tx_ncm.ndp16), 870 &(ctx->tx_ncm.dpe16), 871 (ctx->tx_curr_frame_num + 1) * 872 sizeof(struct usb_cdc_ncm_dpe16)); 873 874 /* set frame length */ 875 skb_put(skb_out, last_offset); 876 877 /* return skb */ 878 ctx->tx_curr_skb = NULL; 879 ctx->netdev->stats.tx_packets += ctx->tx_curr_frame_num; 880 return skb_out; 881 882exit_no_skb: 883 /* Start timer, if there is a remaining skb */ 884 if (ctx->tx_curr_skb != NULL) 885 cdc_ncm_tx_timeout_start(ctx); 886 return NULL; 887} 888 889static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) 890{ 891 /* start timer, if not already started */ 892 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) 893 hrtimer_start(&ctx->tx_timer, 894 ktime_set(0, CDC_NCM_TIMER_INTERVAL), 895 HRTIMER_MODE_REL); 896} 897 898static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) 899{ 900 struct cdc_ncm_ctx *ctx = 901 container_of(timer, struct cdc_ncm_ctx, tx_timer); 902 903 if (!atomic_read(&ctx->stop)) 904 tasklet_schedule(&ctx->bh); 905 return HRTIMER_NORESTART; 906} 907 908static void cdc_ncm_txpath_bh(unsigned long param) 909{ 910 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)param; 911 912 spin_lock_bh(&ctx->mtx); 913 if (ctx->tx_timer_pending != 0) { 914 ctx->tx_timer_pending--; 915 cdc_ncm_tx_timeout_start(ctx); 916 spin_unlock_bh(&ctx->mtx); 917 } else if (ctx->netdev != NULL) { 918 spin_unlock_bh(&ctx->mtx); 919 netif_tx_lock_bh(ctx->netdev); 920 usbnet_start_xmit(NULL, ctx->netdev); 921 netif_tx_unlock_bh(ctx->netdev); 922 } 923} 924 925static struct sk_buff * 926cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 927{ 928 struct sk_buff *skb_out; 929 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 930 931 /* 932 * The Ethernet API we are using does not support transmitting 933 * multiple Ethernet frames in a single call. This driver will 934 * accumulate multiple Ethernet frames and send out a larger 935 * USB frame when the USB buffer is full or when a single jiffies 936 * timeout happens. 937 */ 938 if (ctx == NULL) 939 goto error; 940 941 spin_lock_bh(&ctx->mtx); 942 skb_out = cdc_ncm_fill_tx_frame(ctx, skb); 943 spin_unlock_bh(&ctx->mtx); 944 return skb_out; 945 946error: 947 if (skb != NULL) 948 dev_kfree_skb_any(skb); 949 950 return NULL; 951} 952 953static int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) 954{ 955 struct sk_buff *skb; 956 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 957 int len; 958 int nframes; 959 int x; 960 int offset; 961 struct usb_cdc_ncm_nth16 *nth16; 962 struct usb_cdc_ncm_ndp16 *ndp16; 963 struct usb_cdc_ncm_dpe16 *dpe16; 964 965 if (ctx == NULL) 966 goto error; 967 968 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + 969 sizeof(struct usb_cdc_ncm_ndp16))) { 970 pr_debug("frame too short\n"); 971 goto error; 972 } 973 974 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; 975 976 if (le32_to_cpu(nth16->dwSignature) != USB_CDC_NCM_NTH16_SIGN) { 977 pr_debug("invalid NTH16 signature <%u>\n", 978 le32_to_cpu(nth16->dwSignature)); 979 goto error; 980 } 981 982 len = le16_to_cpu(nth16->wBlockLength); 983 if (len > ctx->rx_max) { 984 pr_debug("unsupported NTB block length %u/%u\n", len, 985 ctx->rx_max); 986 goto error; 987 } 988 989 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && 990 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && 991 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { 992 pr_debug("sequence number glitch prev=%d curr=%d\n", 993 ctx->rx_seq, le16_to_cpu(nth16->wSequence)); 994 } 995 ctx->rx_seq = le16_to_cpu(nth16->wSequence); 996 997 len = le16_to_cpu(nth16->wNdpIndex); 998 if ((len + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { 999 pr_debug("invalid DPT16 index <%u>\n", 1000 le16_to_cpu(nth16->wNdpIndex)); 1001 goto error; 1002 } 1003 1004 ndp16 = (struct usb_cdc_ncm_ndp16 *)(((u8 *)skb_in->data) + len); 1005 1006 if (le32_to_cpu(ndp16->dwSignature) != USB_CDC_NCM_NDP16_NOCRC_SIGN) { 1007 pr_debug("invalid DPT16 signature <%u>\n", 1008 le32_to_cpu(ndp16->dwSignature)); 1009 goto error; 1010 } 1011 1012 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { 1013 pr_debug("invalid DPT16 length <%u>\n", 1014 le32_to_cpu(ndp16->dwSignature)); 1015 goto error; 1016 } 1017 1018 nframes = ((le16_to_cpu(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 len += sizeof(struct usb_cdc_ncm_ndp16); 1024 1025 if ((len + nframes * (sizeof(struct usb_cdc_ncm_dpe16))) > 1026 skb_in->len) { 1027 pr_debug("Invalid nframes = %d\n", nframes); 1028 goto error; 1029 } 1030 1031 dpe16 = (struct usb_cdc_ncm_dpe16 *)(((u8 *)skb_in->data) + len); 1032 1033 for (x = 0; x < nframes; x++, dpe16++) { 1034 offset = le16_to_cpu(dpe16->wDatagramIndex); 1035 len = le16_to_cpu(dpe16->wDatagramLength); 1036 1037 /* 1038 * CDC NCM ch. 3.7 1039 * All entries after first NULL entry are to be ignored 1040 */ 1041 if ((offset == 0) || (len == 0)) { 1042 if (!x) 1043 goto error; /* empty NTB */ 1044 break; 1045 } 1046 1047 /* sanity checking */ 1048 if (((offset + len) > skb_in->len) || 1049 (len > ctx->rx_max) || (len < ETH_HLEN)) { 1050 pr_debug("invalid frame detected (ignored)" 1051 "offset[%u]=%u, length=%u, skb=%p\n", 1052 x, offset, len, skb_in); 1053 if (!x) 1054 goto error; 1055 break; 1056 1057 } else { 1058 skb = skb_clone(skb_in, GFP_ATOMIC); 1059 if (!skb) 1060 goto error; 1061 skb->len = len; 1062 skb->data = ((u8 *)skb_in->data) + offset; 1063 skb_set_tail_pointer(skb, len); 1064 usbnet_skb_return(dev, skb); 1065 } 1066 } 1067 return 1; 1068error: 1069 return 0; 1070} 1071 1072static void 1073cdc_ncm_speed_change(struct cdc_ncm_ctx *ctx, 1074 struct usb_cdc_speed_change *data) 1075{ 1076 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); 1077 uint32_t tx_speed = le32_to_cpu(data->ULBitRate); 1078 1079 /* 1080 * Currently the USB-NET API does not support reporting the actual 1081 * device speed. Do print it instead. 1082 */ 1083 if ((tx_speed != ctx->tx_speed) || (rx_speed != ctx->rx_speed)) { 1084 ctx->tx_speed = tx_speed; 1085 ctx->rx_speed = rx_speed; 1086 1087 if ((tx_speed > 1000000) && (rx_speed > 1000000)) { 1088 printk(KERN_INFO KBUILD_MODNAME 1089 ": %s: %u mbit/s downlink " 1090 "%u mbit/s uplink\n", 1091 ctx->netdev->name, 1092 (unsigned int)(rx_speed / 1000000U), 1093 (unsigned int)(tx_speed / 1000000U)); 1094 } else { 1095 printk(KERN_INFO KBUILD_MODNAME 1096 ": %s: %u kbit/s downlink " 1097 "%u kbit/s uplink\n", 1098 ctx->netdev->name, 1099 (unsigned int)(rx_speed / 1000U), 1100 (unsigned int)(tx_speed / 1000U)); 1101 } 1102 } 1103} 1104 1105static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) 1106{ 1107 struct cdc_ncm_ctx *ctx; 1108 struct usb_cdc_notification *event; 1109 1110 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1111 1112 if (urb->actual_length < sizeof(*event)) 1113 return; 1114 1115 /* test for split data in 8-byte chunks */ 1116 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { 1117 cdc_ncm_speed_change(ctx, 1118 (struct usb_cdc_speed_change *)urb->transfer_buffer); 1119 return; 1120 } 1121 1122 event = urb->transfer_buffer; 1123 1124 switch (event->bNotificationType) { 1125 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 1126 /* 1127 * According to the CDC NCM specification ch.7.1 1128 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be 1129 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. 1130 */ 1131 ctx->connected = event->wValue; 1132 1133 printk(KERN_INFO KBUILD_MODNAME ": %s: network connection:" 1134 " %sconnected\n", 1135 ctx->netdev->name, ctx->connected ? "" : "dis"); 1136 1137 if (ctx->connected) 1138 netif_carrier_on(dev->net); 1139 else { 1140 netif_carrier_off(dev->net); 1141 ctx->tx_speed = ctx->rx_speed = 0; 1142 } 1143 break; 1144 1145 case USB_CDC_NOTIFY_SPEED_CHANGE: 1146 if (urb->actual_length < (sizeof(*event) + 1147 sizeof(struct usb_cdc_speed_change))) 1148 set_bit(EVENT_STS_SPLIT, &dev->flags); 1149 else 1150 cdc_ncm_speed_change(ctx, 1151 (struct usb_cdc_speed_change *) &event[1]); 1152 break; 1153 1154 default: 1155 dev_err(&dev->udev->dev, "NCM: unexpected " 1156 "notification 0x%02x!\n", event->bNotificationType); 1157 break; 1158 } 1159} 1160 1161static int cdc_ncm_check_connect(struct usbnet *dev) 1162{ 1163 struct cdc_ncm_ctx *ctx; 1164 1165 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1166 if (ctx == NULL) 1167 return 1; /* disconnected */ 1168 1169 return !ctx->connected; 1170} 1171 1172static int 1173cdc_ncm_probe(struct usb_interface *udev, const struct usb_device_id *prod) 1174{ 1175 return usbnet_probe(udev, prod); 1176} 1177 1178static void cdc_ncm_disconnect(struct usb_interface *intf) 1179{ 1180 struct usbnet *dev = usb_get_intfdata(intf); 1181 1182 if (dev == NULL) 1183 return; /* already disconnected */ 1184 1185 usbnet_disconnect(intf); 1186} 1187 1188static int cdc_ncm_manage_power(struct usbnet *dev, int status) 1189{ 1190 dev->intf->needs_remote_wakeup = status; 1191 return 0; 1192} 1193 1194static const struct driver_info cdc_ncm_info = { 1195 .description = "CDC NCM", 1196 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET, 1197 .bind = cdc_ncm_bind, 1198 .unbind = cdc_ncm_unbind, 1199 .check_connect = cdc_ncm_check_connect, 1200 .manage_power = cdc_ncm_manage_power, 1201 .status = cdc_ncm_status, 1202 .rx_fixup = cdc_ncm_rx_fixup, 1203 .tx_fixup = cdc_ncm_tx_fixup, 1204}; 1205 1206static struct usb_driver cdc_ncm_driver = { 1207 .name = "cdc_ncm", 1208 .id_table = cdc_devs, 1209 .probe = cdc_ncm_probe, 1210 .disconnect = cdc_ncm_disconnect, 1211 .suspend = usbnet_suspend, 1212 .resume = usbnet_resume, 1213 .reset_resume = usbnet_resume, 1214 .supports_autosuspend = 1, 1215}; 1216 1217static const struct ethtool_ops cdc_ncm_ethtool_ops = { 1218 .get_drvinfo = cdc_ncm_get_drvinfo, 1219 .get_link = usbnet_get_link, 1220 .get_msglevel = usbnet_get_msglevel, 1221 .set_msglevel = usbnet_set_msglevel, 1222 .get_settings = usbnet_get_settings, 1223 .set_settings = usbnet_set_settings, 1224 .nway_reset = usbnet_nway_reset, 1225}; 1226 1227module_usb_driver(cdc_ncm_driver); 1228 1229MODULE_AUTHOR("Hans Petter Selasky"); 1230MODULE_DESCRIPTION("USB CDC NCM host driver"); 1231MODULE_LICENSE("Dual BSD/GPL"); 1232