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Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / drivers / net / usb / cdc_ncm.c
blob3a539a9cac54c399768438a196306f8c2603ad91
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 const 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 = kzalloc(sizeof(*ctx), GFP_KERNEL);
469 if (ctx == NULL)
470 return -ENODEV;
471
472 init_timer(&ctx->tx_timer);
473 spin_lock_init(&ctx->mtx);
474 ctx->netdev = dev->net;
475
476 /* store ctx pointer in device data field */
477 dev->data[0] = (unsigned long)ctx;
478
479 /* get some pointers */
480 driver = driver_of(intf);
481 buf = intf->cur_altsetting->extra;
482 len = intf->cur_altsetting->extralen;
483
484 ctx->udev = dev->udev;
485 ctx->intf = intf;
486
487 /* parse through descriptors associated with control interface */
488 while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) {
489
490 if (buf[1] != USB_DT_CS_INTERFACE)
491 goto advance;
492
493 switch (buf[2]) {
494 case USB_CDC_UNION_TYPE:
495 if (buf[0] < sizeof(*(ctx->union_desc)))
496 break;
497
498 ctx->union_desc =
499 (const struct usb_cdc_union_desc *)buf;
500
501 ctx->control = usb_ifnum_to_if(dev->udev,
502 ctx->union_desc->bMasterInterface0);
503 ctx->data = usb_ifnum_to_if(dev->udev,
504 ctx->union_desc->bSlaveInterface0);
505 break;
506
507 case USB_CDC_ETHERNET_TYPE:
508 if (buf[0] < sizeof(*(ctx->ether_desc)))
509 break;
510
511 ctx->ether_desc =
512 (const struct usb_cdc_ether_desc *)buf;
513 dev->hard_mtu =
514 le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
515
516 if (dev->hard_mtu < CDC_NCM_MIN_DATAGRAM_SIZE)
517 dev->hard_mtu = CDC_NCM_MIN_DATAGRAM_SIZE;
518 else if (dev->hard_mtu > CDC_NCM_MAX_DATAGRAM_SIZE)
519 dev->hard_mtu = CDC_NCM_MAX_DATAGRAM_SIZE;
520 break;
521
522 case USB_CDC_NCM_TYPE:
523 if (buf[0] < sizeof(*(ctx->func_desc)))
524 break;
525
526 ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf;
527 break;
528
529 default:
530 break;
531 }
532 advance:
533 /* advance to next descriptor */
534 temp = buf[0];
535 buf += temp;
536 len -= temp;
537 }
538
539 /* check if we got everything */
540 if ((ctx->control == NULL) || (ctx->data == NULL) ||
541 (ctx->ether_desc == NULL) || (ctx->control != intf))
542 goto error;
543
544 /* claim interfaces, if any */
545 temp = usb_driver_claim_interface(driver, ctx->data, dev);
546 if (temp)
547 goto error;
548
549 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber;
550
551 /* reset data interface */
552 temp = usb_set_interface(dev->udev, iface_no, 0);
553 if (temp)
554 goto error2;
555
556 /* initialize data interface */
557 if (cdc_ncm_setup(ctx))
558 goto error2;
559
560 /* configure data interface */
561 temp = usb_set_interface(dev->udev, iface_no, 1);
562 if (temp)
563 goto error2;
564
565 cdc_ncm_find_endpoints(ctx, ctx->data);
566 cdc_ncm_find_endpoints(ctx, ctx->control);
567
568 if ((ctx->in_ep == NULL) || (ctx->out_ep == NULL) ||
569 (ctx->status_ep == NULL))
570 goto error2;
571
572 dev->net->ethtool_ops = &cdc_ncm_ethtool_ops;
573
574 usb_set_intfdata(ctx->data, dev);
575 usb_set_intfdata(ctx->control, dev);
576 usb_set_intfdata(ctx->intf, dev);
577
578 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress);
579 if (temp)
580 goto error2;
581
582 dev_info(&dev->udev->dev, "MAC-Address: "
583 "0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
584 dev->net->dev_addr[0], dev->net->dev_addr[1],
585 dev->net->dev_addr[2], dev->net->dev_addr[3],
586 dev->net->dev_addr[4], dev->net->dev_addr[5]);
587
588 dev->in = usb_rcvbulkpipe(dev->udev,
589 ctx->in_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
590 dev->out = usb_sndbulkpipe(dev->udev,
591 ctx->out_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
592 dev->status = ctx->status_ep;
593 dev->rx_urb_size = ctx->rx_max;
594
595 /*
596 * We should get an event when network connection is "connected" or
597 * "disconnected". Set network connection in "disconnected" state
598 * (carrier is OFF) during attach, so the IP network stack does not
599 * start IPv6 negotiation and more.
600 */
601 netif_carrier_off(dev->net);
602 ctx->tx_speed = ctx->rx_speed = 0;
603 return 0;
604
605 error2:
606 usb_set_intfdata(ctx->control, NULL);
607 usb_set_intfdata(ctx->data, NULL);
608 usb_driver_release_interface(driver, ctx->data);
609 error:
610 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]);
611 dev->data[0] = 0;
612 dev_info(&dev->udev->dev, "bind() failure\n");
613 return -ENODEV;
614 }
615
616 static void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf)
617 {
618 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
619 struct usb_driver *driver = driver_of(intf);
620
621 if (ctx == NULL)
622 return; /* no setup */
623
624 /* disconnect master --> disconnect slave */
625 if (intf == ctx->control && ctx->data) {
626 usb_set_intfdata(ctx->data, NULL);
627 usb_driver_release_interface(driver, ctx->data);
628 ctx->data = NULL;
629
630 } else if (intf == ctx->data && ctx->control) {
631 usb_set_intfdata(ctx->control, NULL);
632 usb_driver_release_interface(driver, ctx->control);
633 ctx->control = NULL;
634 }
635
636 usb_set_intfdata(ctx->intf, NULL);
637 cdc_ncm_free(ctx);
638 }
639
640 static void cdc_ncm_zero_fill(u8 *ptr, u32 first, u32 end, u32 max)
641 {
642 if (first >= max)
643 return;
644 if (first >= end)
645 return;
646 if (end > max)
647 end = max;
648 memset(ptr + first, 0, end - first);
649 }
650
651 static struct sk_buff *
652 cdc_ncm_fill_tx_frame(struct cdc_ncm_ctx *ctx, struct sk_buff *skb)
653 {
654 struct sk_buff *skb_out;
655 u32 rem;
656 u32 offset;
657 u32 last_offset;
658 u16 n = 0, index;
659 u8 ready2send = 0;
660
661 /* if there is a remaining skb, it gets priority */
662 if (skb != NULL)
663 swap(skb, ctx->tx_rem_skb);
664 else
665 ready2send = 1;
666
667 /*
668 * +----------------+
669 * | skb_out |
670 * +----------------+
671 * ^ offset
672 * ^ last_offset
673 */
674
675 /* check if we are resuming an OUT skb */
676 if (ctx->tx_curr_skb != NULL) {
677 /* pop variables */
678 skb_out = ctx->tx_curr_skb;
679 offset = ctx->tx_curr_offset;
680 last_offset = ctx->tx_curr_last_offset;
681 n = ctx->tx_curr_frame_num;
682
683 } else {
684 /* reset variables */
685 skb_out = alloc_skb((ctx->tx_max + 1), GFP_ATOMIC);
686 if (skb_out == NULL) {
687 if (skb != NULL) {
688 dev_kfree_skb_any(skb);
689 ctx->netdev->stats.tx_dropped++;
690 }
691 goto exit_no_skb;
692 }
693
694 /* make room for NTH and NDP */
695 offset = ALIGN(sizeof(struct usb_cdc_ncm_nth16),
696 ctx->tx_ndp_modulus) +
697 sizeof(struct usb_cdc_ncm_ndp16) +
698 (ctx->tx_max_datagrams + 1) *
699 sizeof(struct usb_cdc_ncm_dpe16);
700
701 /* store last valid offset before alignment */
702 last_offset = offset;
703 /* align first Datagram offset correctly */
704 offset = ALIGN(offset, ctx->tx_modulus) + ctx->tx_remainder;
705 /* zero buffer till the first IP datagram */
706 cdc_ncm_zero_fill(skb_out->data, 0, offset, offset);
707 n = 0;
708 ctx->tx_curr_frame_num = 0;
709 }
710
711 for (; n < ctx->tx_max_datagrams; n++) {
712 /* check if end of transmit buffer is reached */
713 if (offset >= ctx->tx_max) {
714 ready2send = 1;
715 break;
716 }
717 /* compute maximum buffer size */
718 rem = ctx->tx_max - offset;
719
720 if (skb == NULL) {
721 skb = ctx->tx_rem_skb;
722 ctx->tx_rem_skb = NULL;
723
724 /* check for end of skb */
725 if (skb == NULL)
726 break;
727 }
728
729 if (skb->len > rem) {
730 if (n == 0) {
731 /* won't fit, MTU problem? */
732 dev_kfree_skb_any(skb);
733 skb = NULL;
734 ctx->netdev->stats.tx_dropped++;
735 } else {
736 /* no room for skb - store for later */
737 if (ctx->tx_rem_skb != NULL) {
738 dev_kfree_skb_any(ctx->tx_rem_skb);
739 ctx->netdev->stats.tx_dropped++;
740 }
741 ctx->tx_rem_skb = skb;
742 skb = NULL;
743 ready2send = 1;
744 }
745 break;
746 }
747
748 memcpy(((u8 *)skb_out->data) + offset, skb->data, skb->len);
749
750 ctx->tx_ncm.dpe16[n].wDatagramLength = cpu_to_le16(skb->len);
751 ctx->tx_ncm.dpe16[n].wDatagramIndex = cpu_to_le16(offset);
752
753 /* update offset */
754 offset += skb->len;
755
756 /* store last valid offset before alignment */
757 last_offset = offset;
758
759 /* align offset correctly */
760 offset = ALIGN(offset, ctx->tx_modulus) + ctx->tx_remainder;
761
762 /* zero padding */
763 cdc_ncm_zero_fill(skb_out->data, last_offset, offset,
764 ctx->tx_max);
765 dev_kfree_skb_any(skb);
766 skb = NULL;
767 }
768
769 /* free up any dangling skb */
770 if (skb != NULL) {
771 dev_kfree_skb_any(skb);
772 skb = NULL;
773 ctx->netdev->stats.tx_dropped++;
774 }
775
776 ctx->tx_curr_frame_num = n;
777
778 if (n == 0) {
779 /* wait for more frames */
780 /* push variables */
781 ctx->tx_curr_skb = skb_out;
782 ctx->tx_curr_offset = offset;
783 ctx->tx_curr_last_offset = last_offset;
784 goto exit_no_skb;
785
786 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 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 /* set the pending count */
793 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT)
794 ctx->tx_timer_pending = 2;
795 goto exit_no_skb;
796
797 } else {
798 /* frame goes out */
799 /* variables will be reset at next call */
800 }
801
802 /* check for overflow */
803 if (last_offset > ctx->tx_max)
804 last_offset = ctx->tx_max;
805
806 /* revert offset */
807 offset = last_offset;
808
809 /*
810 * If collected data size is less or equal CDC_NCM_MIN_TX_PKT bytes,
811 * we send buffers as it is. If we get more data, it would be more
812 * efficient for USB HS mobile device with DMA engine to receive a full
813 * size NTB, than canceling DMA transfer and receiving a short packet.
814 */
815 if (offset > CDC_NCM_MIN_TX_PKT)
816 offset = ctx->tx_max;
817
818 /* final zero padding */
819 cdc_ncm_zero_fill(skb_out->data, last_offset, offset, ctx->tx_max);
820
821 /* store last offset */
822 last_offset = offset;
823
824 if (((last_offset < ctx->tx_max) && ((last_offset %
825 le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0)) ||
826 (((last_offset == ctx->tx_max) && ((ctx->tx_max %
827 le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0)) &&
828 (ctx->tx_max < le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)))) {
829 /* force short packet */
830 *(((u8 *)skb_out->data) + last_offset) = 0;
831 last_offset++;
832 }
833
834 /* zero the rest of the DPEs plus the last NULL entry */
835 for (; n <= CDC_NCM_DPT_DATAGRAMS_MAX; n++) {
836 ctx->tx_ncm.dpe16[n].wDatagramLength = 0;
837 ctx->tx_ncm.dpe16[n].wDatagramIndex = 0;
838 }
839
840 /* fill out 16-bit NTB header */
841 ctx->tx_ncm.nth16.dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN);
842 ctx->tx_ncm.nth16.wHeaderLength =
843 cpu_to_le16(sizeof(ctx->tx_ncm.nth16));
844 ctx->tx_ncm.nth16.wSequence = cpu_to_le16(ctx->tx_seq);
845 ctx->tx_ncm.nth16.wBlockLength = cpu_to_le16(last_offset);
846 index = ALIGN(sizeof(struct usb_cdc_ncm_nth16), ctx->tx_ndp_modulus);
847 ctx->tx_ncm.nth16.wNdpIndex = cpu_to_le16(index);
848
849 memcpy(skb_out->data, &(ctx->tx_ncm.nth16), sizeof(ctx->tx_ncm.nth16));
850 ctx->tx_seq++;
851
852 /* fill out 16-bit NDP table */
853 ctx->tx_ncm.ndp16.dwSignature =
854 cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN);
855 rem = sizeof(ctx->tx_ncm.ndp16) + ((ctx->tx_curr_frame_num + 1) *
856 sizeof(struct usb_cdc_ncm_dpe16));
857 ctx->tx_ncm.ndp16.wLength = cpu_to_le16(rem);
858 ctx->tx_ncm.ndp16.wNextNdpIndex = 0; /* reserved */
859
860 memcpy(((u8 *)skb_out->data) + index,
861 &(ctx->tx_ncm.ndp16),
862 sizeof(ctx->tx_ncm.ndp16));
863
864 memcpy(((u8 *)skb_out->data) + index + sizeof(ctx->tx_ncm.ndp16),
865 &(ctx->tx_ncm.dpe16),
866 (ctx->tx_curr_frame_num + 1) *
867 sizeof(struct usb_cdc_ncm_dpe16));
868
869 /* set frame length */
870 skb_put(skb_out, last_offset);
871
872 /* return skb */
873 ctx->tx_curr_skb = NULL;
874 return skb_out;
875
876 exit_no_skb:
877 return NULL;
878 }
879
880 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx)
881 {
882 /* start timer, if not already started */
883 if (timer_pending(&ctx->tx_timer) == 0) {
884 ctx->tx_timer.function = &cdc_ncm_tx_timeout;
885 ctx->tx_timer.data = (unsigned long)ctx;
886 ctx->tx_timer.expires = jiffies + ((HZ + 999) / 1000);
887 add_timer(&ctx->tx_timer);
888 }
889 }
890
891 static void cdc_ncm_tx_timeout(unsigned long arg)
892 {
893 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)arg;
894 u8 restart;
895
896 spin_lock(&ctx->mtx);
897 if (ctx->tx_timer_pending != 0) {
898 ctx->tx_timer_pending--;
899 restart = 1;
900 } else {
901 restart = 0;
902 }
903
904 spin_unlock(&ctx->mtx);
905
906 if (restart) {
907 spin_lock(&ctx->mtx);
908 cdc_ncm_tx_timeout_start(ctx);
909 spin_unlock(&ctx->mtx);
910 } else if (ctx->netdev != NULL) {
911 usbnet_start_xmit(NULL, ctx->netdev);
912 }
913 }
914
915 static struct sk_buff *
916 cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
917 {
918 struct sk_buff *skb_out;
919 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
920 u8 need_timer = 0;
921
922 /*
923 * The Ethernet API we are using does not support transmitting
924 * multiple Ethernet frames in a single call. This driver will
925 * accumulate multiple Ethernet frames and send out a larger
926 * USB frame when the USB buffer is full or when a single jiffies
927 * timeout happens.
928 */
929 if (ctx == NULL)
930 goto error;
931
932 spin_lock(&ctx->mtx);
933 skb_out = cdc_ncm_fill_tx_frame(ctx, skb);
934 if (ctx->tx_curr_skb != NULL)
935 need_timer = 1;
936
937 /* Start timer, if there is a remaining skb */
938 if (need_timer)
939 cdc_ncm_tx_timeout_start(ctx);
940
941 if (skb_out)
942 dev->net->stats.tx_packets += ctx->tx_curr_frame_num;
943
944 spin_unlock(&ctx->mtx);
945 return skb_out;
946
947 error:
948 if (skb != NULL)
949 dev_kfree_skb_any(skb);
950
951 return NULL;
952 }
953
954 static int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
955 {
956 struct sk_buff *skb;
957 struct cdc_ncm_ctx *ctx;
958 int sumlen;
959 int actlen;
960 int temp;
961 int nframes;
962 int x;
963 int offset;
964
965 ctx = (struct cdc_ncm_ctx *)dev->data[0];
966 if (ctx == NULL)
967 goto error;
968
969 actlen = skb_in->len;
970 sumlen = CDC_NCM_NTB_MAX_SIZE_RX;
971
972 if (actlen < (sizeof(ctx->rx_ncm.nth16) + sizeof(ctx->rx_ncm.ndp16))) {
973 pr_debug("frame too short\n");
974 goto error;
975 }
976
977 memcpy(&(ctx->rx_ncm.nth16), ((u8 *)skb_in->data),
978 sizeof(ctx->rx_ncm.nth16));
979
980 if (le32_to_cpu(ctx->rx_ncm.nth16.dwSignature) !=
981 USB_CDC_NCM_NTH16_SIGN) {
982 pr_debug("invalid NTH16 signature <%u>\n",
983 le32_to_cpu(ctx->rx_ncm.nth16.dwSignature));
984 goto error;
985 }
986
987 temp = le16_to_cpu(ctx->rx_ncm.nth16.wBlockLength);
988 if (temp > sumlen) {
989 pr_debug("unsupported NTB block length %u/%u\n", temp, sumlen);
990 goto error;
991 }
992
993 temp = le16_to_cpu(ctx->rx_ncm.nth16.wNdpIndex);
994 if ((temp + sizeof(ctx->rx_ncm.ndp16)) > actlen) {
995 pr_debug("invalid DPT16 index\n");
996 goto error;
997 }
998
999 memcpy(&(ctx->rx_ncm.ndp16), ((u8 *)skb_in->data) + temp,
1000 sizeof(ctx->rx_ncm.ndp16));
1001
1002 if (le32_to_cpu(ctx->rx_ncm.ndp16.dwSignature) !=
1003 USB_CDC_NCM_NDP16_NOCRC_SIGN) {
1004 pr_debug("invalid DPT16 signature <%u>\n",
1005 le32_to_cpu(ctx->rx_ncm.ndp16.dwSignature));
1006 goto error;
1007 }
1008
1009 if (le16_to_cpu(ctx->rx_ncm.ndp16.wLength) <
1010 USB_CDC_NCM_NDP16_LENGTH_MIN) {
1011 pr_debug("invalid DPT16 length <%u>\n",
1012 le32_to_cpu(ctx->rx_ncm.ndp16.dwSignature));
1013 goto error;
1014 }
1015
1016 nframes = ((le16_to_cpu(ctx->rx_ncm.ndp16.wLength) -
1017 sizeof(struct usb_cdc_ncm_ndp16)) /
1018 sizeof(struct usb_cdc_ncm_dpe16));
1019 nframes--; /* we process NDP entries except for the last one */
1020
1021 pr_debug("nframes = %u\n", nframes);
1022
1023 temp += sizeof(ctx->rx_ncm.ndp16);
1024
1025 if ((temp + nframes * (sizeof(struct usb_cdc_ncm_dpe16))) > actlen) {
1026 pr_debug("Invalid nframes = %d\n", nframes);
1027 goto error;
1028 }
1029
1030 if (nframes > CDC_NCM_DPT_DATAGRAMS_MAX) {
1031 pr_debug("Truncating number of frames from %u to %u\n",
1032 nframes, CDC_NCM_DPT_DATAGRAMS_MAX);
1033 nframes = CDC_NCM_DPT_DATAGRAMS_MAX;
1034 }
1035
1036 memcpy(&(ctx->rx_ncm.dpe16), ((u8 *)skb_in->data) + temp,
1037 nframes * (sizeof(struct usb_cdc_ncm_dpe16)));
1038
1039 for (x = 0; x < nframes; x++) {
1040 offset = le16_to_cpu(ctx->rx_ncm.dpe16[x].wDatagramIndex);
1041 temp = le16_to_cpu(ctx->rx_ncm.dpe16[x].wDatagramLength);
1042
1043 /*
1044 * CDC NCM ch. 3.7
1045 * All entries after first NULL entry are to be ignored
1046 */
1047 if ((offset == 0) || (temp == 0)) {
1048 if (!x)
1049 goto error; /* empty NTB */
1050 break;
1051 }
1052
1053 /* sanity checking */
1054 if (((offset + temp) > actlen) ||
1055 (temp > CDC_NCM_MAX_DATAGRAM_SIZE) || (temp < ETH_HLEN)) {
1056 pr_debug("invalid frame detected (ignored)"
1057 "offset[%u]=%u, length=%u, skb=%p\n",
1058 x, offset, temp, skb_in);
1059 if (!x)
1060 goto error;
1061 break;
1062
1063 } else {
1064 skb = skb_clone(skb_in, GFP_ATOMIC);
1065 if (!skb)
1066 goto error;
1067 skb->len = temp;
1068 skb->data = ((u8 *)skb_in->data) + offset;
1069 skb_set_tail_pointer(skb, temp);
1070 usbnet_skb_return(dev, skb);
1071 }
1072 }
1073 return 1;
1074 error:
1075 return 0;
1076 }
1077
1078 static void
1079 cdc_ncm_speed_change(struct cdc_ncm_ctx *ctx,
1080 struct usb_cdc_speed_change *data)
1081 {
1082 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate);
1083 uint32_t tx_speed = le32_to_cpu(data->ULBitRate);
1084
1085 /*
1086 * Currently the USB-NET API does not support reporting the actual
1087 * device speed. Do print it instead.
1088 */
1089 if ((tx_speed != ctx->tx_speed) || (rx_speed != ctx->rx_speed)) {
1090 ctx->tx_speed = tx_speed;
1091 ctx->rx_speed = rx_speed;
1092
1093 if ((tx_speed > 1000000) && (rx_speed > 1000000)) {
1094 printk(KERN_INFO KBUILD_MODNAME
1095 ": %s: %u mbit/s downlink "
1096 "%u mbit/s uplink\n",
1097 ctx->netdev->name,
1098 (unsigned int)(rx_speed / 1000000U),
1099 (unsigned int)(tx_speed / 1000000U));
1100 } else {
1101 printk(KERN_INFO KBUILD_MODNAME
1102 ": %s: %u kbit/s downlink "
1103 "%u kbit/s uplink\n",
1104 ctx->netdev->name,
1105 (unsigned int)(rx_speed / 1000U),
1106 (unsigned int)(tx_speed / 1000U));
1107 }
1108 }
1109 }
1110
1111 static void cdc_ncm_status(struct usbnet *dev, struct urb *urb)
1112 {
1113 struct cdc_ncm_ctx *ctx;
1114 struct usb_cdc_notification *event;
1115
1116 ctx = (struct cdc_ncm_ctx *)dev->data[0];
1117
1118 if (urb->actual_length < sizeof(*event))
1119 return;
1120
1121 /* test for split data in 8-byte chunks */
1122 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
1123 cdc_ncm_speed_change(ctx,
1124 (struct usb_cdc_speed_change *)urb->transfer_buffer);
1125 return;
1126 }
1127
1128 event = urb->transfer_buffer;
1129
1130 switch (event->bNotificationType) {
1131 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
1132 /*
1133 * According to the CDC NCM specification ch.7.1
1134 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be
1135 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE.
1136 */
1137 ctx->connected = event->wValue;
1138
1139 printk(KERN_INFO KBUILD_MODNAME ": %s: network connection:"
1140 " %sconnected\n",
1141 ctx->netdev->name, ctx->connected ? "" : "dis");
1142
1143 if (ctx->connected)
1144 netif_carrier_on(dev->net);
1145 else {
1146 netif_carrier_off(dev->net);
1147 ctx->tx_speed = ctx->rx_speed = 0;
1148 }
1149 break;
1150
1151 case USB_CDC_NOTIFY_SPEED_CHANGE:
1152 if (urb->actual_length < (sizeof(*event) +
1153 sizeof(struct usb_cdc_speed_change)))
1154 set_bit(EVENT_STS_SPLIT, &dev->flags);
1155 else
1156 cdc_ncm_speed_change(ctx,
1157 (struct usb_cdc_speed_change *) &event[1]);
1158 break;
1159
1160 default:
1161 dev_err(&dev->udev->dev, "NCM: unexpected "
1162 "notification 0x%02x!\n", event->bNotificationType);
1163 break;
1164 }
1165 }
1166
1167 static int cdc_ncm_check_connect(struct usbnet *dev)
1168 {
1169 struct cdc_ncm_ctx *ctx;
1170
1171 ctx = (struct cdc_ncm_ctx *)dev->data[0];
1172 if (ctx == NULL)
1173 return 1; /* disconnected */
1174
1175 return !ctx->connected;
1176 }
1177
1178 static int
1179 cdc_ncm_probe(struct usb_interface *udev, const struct usb_device_id *prod)
1180 {
1181 return usbnet_probe(udev, prod);
1182 }
1183
1184 static void cdc_ncm_disconnect(struct usb_interface *intf)
1185 {
1186 struct usbnet *dev = usb_get_intfdata(intf);
1187
1188 if (dev == NULL)
1189 return; /* already disconnected */
1190
1191 usbnet_disconnect(intf);
1192 }
1193
1194 static int cdc_ncm_manage_power(struct usbnet *dev, int status)
1195 {
1196 dev->intf->needs_remote_wakeup = status;
1197 return 0;
1198 }
1199
1200 static const struct driver_info cdc_ncm_info = {
1201 .description = "CDC NCM",
1202 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET,
1203 .bind = cdc_ncm_bind,
1204 .unbind = cdc_ncm_unbind,
1205 .check_connect = cdc_ncm_check_connect,
1206 .manage_power = cdc_ncm_manage_power,
1207 .status = cdc_ncm_status,
1208 .rx_fixup = cdc_ncm_rx_fixup,
1209 .tx_fixup = cdc_ncm_tx_fixup,
1210 };
1211
1212 static struct usb_driver cdc_ncm_driver = {
1213 .name = "cdc_ncm",
1214 .id_table = cdc_devs,
1215 .probe = cdc_ncm_probe,
1216 .disconnect = cdc_ncm_disconnect,
1217 .suspend = usbnet_suspend,
1218 .resume = usbnet_resume,
1219 .reset_resume = usbnet_resume,
1220 .supports_autosuspend = 1,
1221 };
1222
1223 static const struct ethtool_ops cdc_ncm_ethtool_ops = {
1224 .get_drvinfo = cdc_ncm_get_drvinfo,
1225 .get_link = usbnet_get_link,
1226 .get_msglevel = usbnet_get_msglevel,
1227 .set_msglevel = usbnet_set_msglevel,
1228 .get_settings = usbnet_get_settings,
1229 .set_settings = usbnet_set_settings,
1230 .nway_reset = usbnet_nway_reset,
1231 };
1232
1233 module_usb_driver(cdc_ncm_driver);
1234
1235 MODULE_AUTHOR("Hans Petter Selasky");
1236 MODULE_DESCRIPTION("USB CDC NCM host driver");
1237 MODULE_LICENSE("Dual BSD/GPL");