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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / drivers / net / usb / cdc_ncm.c
blobf06fb78383a1b865b22c989661a1795f4d7f0368
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");
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