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ARM: 7409/1: Do not call flush_cache_user_range with mmap_sem held
[linux/fpc-iii.git] / drivers / net / usb / cdc_ncm.c
blob6a53161102c40c82778050dc37e30a797a4f6088
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/version.h>
51 #include <linux/timer.h>
52 #include <linux/spinlock.h>
53 #include <linux/atomic.h>
54 #include <linux/usb/usbnet.h>
55 #include <linux/usb/cdc.h>
56
57 #define DRIVER_VERSION "04-Aug-2011"
58
59 /* CDC NCM subclass 3.2.1 */
60 #define USB_CDC_NCM_NDP16_LENGTH_MIN 0x10
61
62 /* Maximum NTB length */
63 #define CDC_NCM_NTB_MAX_SIZE_TX 16384 /* bytes */
64 #define CDC_NCM_NTB_MAX_SIZE_RX 16384 /* bytes */
65
66 /* Minimum value for MaxDatagramSize, ch. 6.2.9 */
67 #define CDC_NCM_MIN_DATAGRAM_SIZE 1514 /* bytes */
68
69 #define CDC_NCM_MIN_TX_PKT 512 /* bytes */
70
71 /* Default value for MaxDatagramSize */
72 #define CDC_NCM_MAX_DATAGRAM_SIZE 2048 /* bytes */
73
74 /*
75 * Maximum amount of datagrams in NCM Datagram Pointer Table, not counting
76 * the last NULL entry. Any additional datagrams in NTB would be discarded.
77 */
78 #define CDC_NCM_DPT_DATAGRAMS_MAX 32
79
80 /* Maximum amount of IN datagrams in NTB */
81 #define CDC_NCM_DPT_DATAGRAMS_IN_MAX 0 /* unlimited */
82
83 /* Restart the timer, if amount of datagrams is less than given value */
84 #define CDC_NCM_RESTART_TIMER_DATAGRAM_CNT 3
85
86 /* The following macro defines the minimum header space */
87 #define CDC_NCM_MIN_HDR_SIZE \
88 (sizeof(struct usb_cdc_ncm_nth16) + sizeof(struct usb_cdc_ncm_ndp16) + \
89 (CDC_NCM_DPT_DATAGRAMS_MAX + 1) * sizeof(struct usb_cdc_ncm_dpe16))
90
91 struct cdc_ncm_data {
92 struct usb_cdc_ncm_nth16 nth16;
93 struct usb_cdc_ncm_ndp16 ndp16;
94 struct usb_cdc_ncm_dpe16 dpe16[CDC_NCM_DPT_DATAGRAMS_MAX + 1];
95 };
96
97 struct cdc_ncm_ctx {
98 struct cdc_ncm_data rx_ncm;
99 struct cdc_ncm_data tx_ncm;
100 struct usb_cdc_ncm_ntb_parameters ncm_parm;
101 struct timer_list tx_timer;
102
103 const struct usb_cdc_ncm_desc *func_desc;
104 const struct usb_cdc_header_desc *header_desc;
105 const struct usb_cdc_union_desc *union_desc;
106 const struct usb_cdc_ether_desc *ether_desc;
107
108 struct net_device *netdev;
109 struct usb_device *udev;
110 struct usb_host_endpoint *in_ep;
111 struct usb_host_endpoint *out_ep;
112 struct usb_host_endpoint *status_ep;
113 struct usb_interface *intf;
114 struct usb_interface *control;
115 struct usb_interface *data;
116
117 struct sk_buff *tx_curr_skb;
118 struct sk_buff *tx_rem_skb;
119
120 spinlock_t mtx;
121
122 u32 tx_timer_pending;
123 u32 tx_curr_offset;
124 u32 tx_curr_last_offset;
125 u32 tx_curr_frame_num;
126 u32 rx_speed;
127 u32 tx_speed;
128 u32 rx_max;
129 u32 tx_max;
130 u32 max_datagram_size;
131 u16 tx_max_datagrams;
132 u16 tx_remainder;
133 u16 tx_modulus;
134 u16 tx_ndp_modulus;
135 u16 tx_seq;
136 u16 connected;
137 };
138
139 static void cdc_ncm_tx_timeout(unsigned long arg);
140 static const struct driver_info cdc_ncm_info;
141 static struct usb_driver cdc_ncm_driver;
142 static struct ethtool_ops cdc_ncm_ethtool_ops;
143
144 static const struct usb_device_id cdc_devs[] = {
145 { USB_INTERFACE_INFO(USB_CLASS_COMM,
146 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
147 .driver_info = (unsigned long)&cdc_ncm_info,
148 },
149 {
150 },
151 };
152
153 MODULE_DEVICE_TABLE(usb, cdc_devs);
154
155 static void
156 cdc_ncm_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
157 {
158 struct usbnet *dev = netdev_priv(net);
159
160 strncpy(info->driver, dev->driver_name, sizeof(info->driver));
161 strncpy(info->version, DRIVER_VERSION, sizeof(info->version));
162 strncpy(info->fw_version, dev->driver_info->description,
163 sizeof(info->fw_version));
164 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
165 }
166
167 static u8 cdc_ncm_setup(struct cdc_ncm_ctx *ctx)
168 {
169 u32 val;
170 u8 flags;
171 u8 iface_no;
172 int err;
173 u16 ntb_fmt_supported;
174
175 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
176
177 err = usb_control_msg(ctx->udev,
178 usb_rcvctrlpipe(ctx->udev, 0),
179 USB_CDC_GET_NTB_PARAMETERS,
180 USB_TYPE_CLASS | USB_DIR_IN
181 | USB_RECIP_INTERFACE,
182 0, iface_no, &ctx->ncm_parm,
183 sizeof(ctx->ncm_parm), 10000);
184 if (err < 0) {
185 pr_debug("failed GET_NTB_PARAMETERS\n");
186 return 1;
187 }
188
189 /* read correct set of parameters according to device mode */
190 ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize);
191 ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize);
192 ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder);
193 ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor);
194 ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment);
195 /* devices prior to NCM Errata shall set this field to zero */
196 ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams);
197 ntb_fmt_supported = le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported);
198
199 if (ctx->func_desc != NULL)
200 flags = ctx->func_desc->bmNetworkCapabilities;
201 else
202 flags = 0;
203
204 pr_debug("dwNtbInMaxSize=%u dwNtbOutMaxSize=%u "
205 "wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u "
206 "wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n",
207 ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus,
208 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, flags);
209
210 /* max count of tx datagrams */
211 if ((ctx->tx_max_datagrams == 0) ||
212 (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX))
213 ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX;
214
215 /* verify maximum size of received NTB in bytes */
216 if (ctx->rx_max < USB_CDC_NCM_NTB_MIN_IN_SIZE) {
217 pr_debug("Using min receive length=%d\n",
218 USB_CDC_NCM_NTB_MIN_IN_SIZE);
219 ctx->rx_max = USB_CDC_NCM_NTB_MIN_IN_SIZE;
220 }
221
222 if (ctx->rx_max > CDC_NCM_NTB_MAX_SIZE_RX) {
223 pr_debug("Using default maximum receive length=%d\n",
224 CDC_NCM_NTB_MAX_SIZE_RX);
225 ctx->rx_max = CDC_NCM_NTB_MAX_SIZE_RX;
226 }
227
228 /* inform device about NTB input size changes */
229 if (ctx->rx_max != le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)) {
230
231 if (flags & USB_CDC_NCM_NCAP_NTB_INPUT_SIZE) {
232 struct usb_cdc_ncm_ndp_input_size *ndp_in_sz;
233
234 ndp_in_sz = kzalloc(sizeof(*ndp_in_sz), GFP_KERNEL);
235 if (!ndp_in_sz) {
236 err = -ENOMEM;
237 goto size_err;
238 }
239
240 err = usb_control_msg(ctx->udev,
241 usb_sndctrlpipe(ctx->udev, 0),
242 USB_CDC_SET_NTB_INPUT_SIZE,
243 USB_TYPE_CLASS | USB_DIR_OUT
244 | USB_RECIP_INTERFACE,
245 0, iface_no, ndp_in_sz, 8, 1000);
246 kfree(ndp_in_sz);
247 } else {
248 __le32 *dwNtbInMaxSize;
249 dwNtbInMaxSize = kzalloc(sizeof(*dwNtbInMaxSize),
250 GFP_KERNEL);
251 if (!dwNtbInMaxSize) {
252 err = -ENOMEM;
253 goto size_err;
254 }
255 *dwNtbInMaxSize = cpu_to_le32(ctx->rx_max);
256
257 err = usb_control_msg(ctx->udev,
258 usb_sndctrlpipe(ctx->udev, 0),
259 USB_CDC_SET_NTB_INPUT_SIZE,
260 USB_TYPE_CLASS | USB_DIR_OUT
261 | USB_RECIP_INTERFACE,
262 0, iface_no, dwNtbInMaxSize, 4, 1000);
263 kfree(dwNtbInMaxSize);
264 }
265 size_err:
266 if (err < 0)
267 pr_debug("Setting NTB Input Size failed\n");
268 }
269
270 /* verify maximum size of transmitted NTB in bytes */
271 if ((ctx->tx_max <
272 (CDC_NCM_MIN_HDR_SIZE + CDC_NCM_MIN_DATAGRAM_SIZE)) ||
273 (ctx->tx_max > CDC_NCM_NTB_MAX_SIZE_TX)) {
274 pr_debug("Using default maximum transmit length=%d\n",
275 CDC_NCM_NTB_MAX_SIZE_TX);
276 ctx->tx_max = CDC_NCM_NTB_MAX_SIZE_TX;
277 }
278
279 /*
280 * verify that the structure alignment is:
281 * - power of two
282 * - not greater than the maximum transmit length
283 * - not less than four bytes
284 */
285 val = ctx->tx_ndp_modulus;
286
287 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
288 (val != ((-val) & val)) || (val >= ctx->tx_max)) {
289 pr_debug("Using default alignment: 4 bytes\n");
290 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
291 }
292
293 /*
294 * verify that the payload alignment is:
295 * - power of two
296 * - not greater than the maximum transmit length
297 * - not less than four bytes
298 */
299 val = ctx->tx_modulus;
300
301 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
302 (val != ((-val) & val)) || (val >= ctx->tx_max)) {
303 pr_debug("Using default transmit modulus: 4 bytes\n");
304 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
305 }
306
307 /* verify the payload remainder */
308 if (ctx->tx_remainder >= ctx->tx_modulus) {
309 pr_debug("Using default transmit remainder: 0 bytes\n");
310 ctx->tx_remainder = 0;
311 }
312
313 /* adjust TX-remainder according to NCM specification. */
314 ctx->tx_remainder = ((ctx->tx_remainder - ETH_HLEN) &
315 (ctx->tx_modulus - 1));
316
317 /* additional configuration */
318
319 /* set CRC Mode */
320 if (flags & USB_CDC_NCM_NCAP_CRC_MODE) {
321 err = usb_control_msg(ctx->udev, usb_sndctrlpipe(ctx->udev, 0),
322 USB_CDC_SET_CRC_MODE,
323 USB_TYPE_CLASS | USB_DIR_OUT
324 | USB_RECIP_INTERFACE,
325 USB_CDC_NCM_CRC_NOT_APPENDED,
326 iface_no, NULL, 0, 1000);
327 if (err < 0)
328 pr_debug("Setting CRC mode off failed\n");
329 }
330
331 /* set NTB format, if both formats are supported */
332 if (ntb_fmt_supported & USB_CDC_NCM_NTH32_SIGN) {
333 err = usb_control_msg(ctx->udev, usb_sndctrlpipe(ctx->udev, 0),
334 USB_CDC_SET_NTB_FORMAT, USB_TYPE_CLASS
335 | USB_DIR_OUT | USB_RECIP_INTERFACE,
336 USB_CDC_NCM_NTB16_FORMAT,
337 iface_no, NULL, 0, 1000);
338 if (err < 0)
339 pr_debug("Setting NTB format to 16-bit failed\n");
340 }
341
342 ctx->max_datagram_size = CDC_NCM_MIN_DATAGRAM_SIZE;
343
344 /* set Max Datagram Size (MTU) */
345 if (flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE) {
346 __le16 *max_datagram_size;
347 u16 eth_max_sz = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
348
349 max_datagram_size = kzalloc(sizeof(*max_datagram_size),
350 GFP_KERNEL);
351 if (!max_datagram_size) {
352 err = -ENOMEM;
353 goto max_dgram_err;
354 }
355
356 err = usb_control_msg(ctx->udev, usb_rcvctrlpipe(ctx->udev, 0),
357 USB_CDC_GET_MAX_DATAGRAM_SIZE,
358 USB_TYPE_CLASS | USB_DIR_IN
359 | USB_RECIP_INTERFACE,
360 0, iface_no, max_datagram_size,
361 2, 1000);
362 if (err < 0) {
363 pr_debug("GET_MAX_DATAGRAM_SIZE failed, use size=%u\n",
364 CDC_NCM_MIN_DATAGRAM_SIZE);
365 kfree(max_datagram_size);
366 } else {
367 ctx->max_datagram_size =
368 le16_to_cpu(*max_datagram_size);
369 /* Check Eth descriptor value */
370 if (eth_max_sz < CDC_NCM_MAX_DATAGRAM_SIZE) {
371 if (ctx->max_datagram_size > eth_max_sz)
372 ctx->max_datagram_size = eth_max_sz;
373 } else {
374 if (ctx->max_datagram_size >
375 CDC_NCM_MAX_DATAGRAM_SIZE)
376 ctx->max_datagram_size =
377 CDC_NCM_MAX_DATAGRAM_SIZE;
378 }
379
380 if (ctx->max_datagram_size < CDC_NCM_MIN_DATAGRAM_SIZE)
381 ctx->max_datagram_size =
382 CDC_NCM_MIN_DATAGRAM_SIZE;
383
384 /* if value changed, update device */
385 err = usb_control_msg(ctx->udev,
386 usb_sndctrlpipe(ctx->udev, 0),
387 USB_CDC_SET_MAX_DATAGRAM_SIZE,
388 USB_TYPE_CLASS | USB_DIR_OUT
389 | USB_RECIP_INTERFACE,
390 0,
391 iface_no, max_datagram_size,
392 2, 1000);
393 kfree(max_datagram_size);
394 max_dgram_err:
395 if (err < 0)
396 pr_debug("SET_MAX_DATAGRAM_SIZE failed\n");
397 }
398
399 }
400
401 if (ctx->netdev->mtu != (ctx->max_datagram_size - ETH_HLEN))
402 ctx->netdev->mtu = ctx->max_datagram_size - ETH_HLEN;
403
404 return 0;
405 }
406
407 static void
408 cdc_ncm_find_endpoints(struct cdc_ncm_ctx *ctx, struct usb_interface *intf)
409 {
410 struct usb_host_endpoint *e;
411 u8 ep;
412
413 for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) {
414
415 e = intf->cur_altsetting->endpoint + ep;
416 switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
417 case USB_ENDPOINT_XFER_INT:
418 if (usb_endpoint_dir_in(&e->desc)) {
419 if (ctx->status_ep == NULL)
420 ctx->status_ep = e;
421 }
422 break;
423
424 case USB_ENDPOINT_XFER_BULK:
425 if (usb_endpoint_dir_in(&e->desc)) {
426 if (ctx->in_ep == NULL)
427 ctx->in_ep = e;
428 } else {
429 if (ctx->out_ep == NULL)
430 ctx->out_ep = e;
431 }
432 break;
433
434 default:
435 break;
436 }
437 }
438 }
439
440 static void cdc_ncm_free(struct cdc_ncm_ctx *ctx)
441 {
442 if (ctx == NULL)
443 return;
444
445 del_timer_sync(&ctx->tx_timer);
446
447 if (ctx->tx_rem_skb != NULL) {
448 dev_kfree_skb_any(ctx->tx_rem_skb);
449 ctx->tx_rem_skb = NULL;
450 }
451
452 if (ctx->tx_curr_skb != NULL) {
453 dev_kfree_skb_any(ctx->tx_curr_skb);
454 ctx->tx_curr_skb = NULL;
455 }
456
457 kfree(ctx);
458 }
459
460 static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf)
461 {
462 struct cdc_ncm_ctx *ctx;
463 struct usb_driver *driver;
464 u8 *buf;
465 int len;
466 int temp;
467 u8 iface_no;
468
469 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
470 if (ctx == NULL)
471 return -ENODEV;
472
473 memset(ctx, 0, sizeof(*ctx));
474
475 init_timer(&ctx->tx_timer);
476 spin_lock_init(&ctx->mtx);
477 ctx->netdev = dev->net;
478
479 /* store ctx pointer in device data field */
480 dev->data[0] = (unsigned long)ctx;
481
482 /* get some pointers */
483 driver = driver_of(intf);
484 buf = intf->cur_altsetting->extra;
485 len = intf->cur_altsetting->extralen;
486
487 ctx->udev = dev->udev;
488 ctx->intf = intf;
489
490 /* parse through descriptors associated with control interface */
491 while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) {
492
493 if (buf[1] != USB_DT_CS_INTERFACE)
494 goto advance;
495
496 switch (buf[2]) {
497 case USB_CDC_UNION_TYPE:
498 if (buf[0] < sizeof(*(ctx->union_desc)))
499 break;
500
501 ctx->union_desc =
502 (const struct usb_cdc_union_desc *)buf;
503
504 ctx->control = usb_ifnum_to_if(dev->udev,
505 ctx->union_desc->bMasterInterface0);
506 ctx->data = usb_ifnum_to_if(dev->udev,
507 ctx->union_desc->bSlaveInterface0);
508 break;
509
510 case USB_CDC_ETHERNET_TYPE:
511 if (buf[0] < sizeof(*(ctx->ether_desc)))
512 break;
513
514 ctx->ether_desc =
515 (const struct usb_cdc_ether_desc *)buf;
516 dev->hard_mtu =
517 le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
518
519 if (dev->hard_mtu < CDC_NCM_MIN_DATAGRAM_SIZE)
520 dev->hard_mtu = CDC_NCM_MIN_DATAGRAM_SIZE;
521 else if (dev->hard_mtu > CDC_NCM_MAX_DATAGRAM_SIZE)
522 dev->hard_mtu = CDC_NCM_MAX_DATAGRAM_SIZE;
523 break;
524
525 case USB_CDC_NCM_TYPE:
526 if (buf[0] < sizeof(*(ctx->func_desc)))
527 break;
528
529 ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf;
530 break;
531
532 default:
533 break;
534 }
535 advance:
536 /* advance to next descriptor */
537 temp = buf[0];
538 buf += temp;
539 len -= temp;
540 }
541
542 /* check if we got everything */
543 if ((ctx->control == NULL) || (ctx->data == NULL) ||
544 (ctx->ether_desc == NULL) || (ctx->control != intf))
545 goto error;
546
547 /* claim interfaces, if any */
548 temp = usb_driver_claim_interface(driver, ctx->data, dev);
549 if (temp)
550 goto error;
551
552 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber;
553
554 /* reset data interface */
555 temp = usb_set_interface(dev->udev, iface_no, 0);
556 if (temp)
557 goto error2;
558
559 /* initialize data interface */
560 if (cdc_ncm_setup(ctx))
561 goto error2;
562
563 /* configure data interface */
564 temp = usb_set_interface(dev->udev, iface_no, 1);
565 if (temp)
566 goto error2;
567
568 cdc_ncm_find_endpoints(ctx, ctx->data);
569 cdc_ncm_find_endpoints(ctx, ctx->control);
570
571 if ((ctx->in_ep == NULL) || (ctx->out_ep == NULL) ||
572 (ctx->status_ep == NULL))
573 goto error2;
574
575 dev->net->ethtool_ops = &cdc_ncm_ethtool_ops;
576
577 usb_set_intfdata(ctx->data, dev);
578 usb_set_intfdata(ctx->control, dev);
579 usb_set_intfdata(ctx->intf, dev);
580
581 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress);
582 if (temp)
583 goto error2;
584
585 dev_info(&dev->udev->dev, "MAC-Address: "
586 "0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
587 dev->net->dev_addr[0], dev->net->dev_addr[1],
588 dev->net->dev_addr[2], dev->net->dev_addr[3],
589 dev->net->dev_addr[4], dev->net->dev_addr[5]);
590
591 dev->in = usb_rcvbulkpipe(dev->udev,
592 ctx->in_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
593 dev->out = usb_sndbulkpipe(dev->udev,
594 ctx->out_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
595 dev->status = ctx->status_ep;
596 dev->rx_urb_size = ctx->rx_max;
597
598 /*
599 * We should get an event when network connection is "connected" or
600 * "disconnected". Set network connection in "disconnected" state
601 * (carrier is OFF) during attach, so the IP network stack does not
602 * start IPv6 negotiation and more.
603 */
604 netif_carrier_off(dev->net);
605 ctx->tx_speed = ctx->rx_speed = 0;
606 return 0;
607
608 error2:
609 usb_set_intfdata(ctx->control, NULL);
610 usb_set_intfdata(ctx->data, NULL);
611 usb_driver_release_interface(driver, ctx->data);
612 error:
613 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]);
614 dev->data[0] = 0;
615 dev_info(&dev->udev->dev, "bind() failure\n");
616 return -ENODEV;
617 }
618
619 static void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf)
620 {
621 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
622 struct usb_driver *driver = driver_of(intf);
623
624 if (ctx == NULL)
625 return; /* no setup */
626
627 /* disconnect master --> disconnect slave */
628 if (intf == ctx->control && ctx->data) {
629 usb_set_intfdata(ctx->data, NULL);
630 usb_driver_release_interface(driver, ctx->data);
631 ctx->data = NULL;
632
633 } else if (intf == ctx->data && ctx->control) {
634 usb_set_intfdata(ctx->control, NULL);
635 usb_driver_release_interface(driver, ctx->control);
636 ctx->control = NULL;
637 }
638
639 usb_set_intfdata(ctx->intf, NULL);
640 cdc_ncm_free(ctx);
641 }
642
643 static void cdc_ncm_zero_fill(u8 *ptr, u32 first, u32 end, u32 max)
644 {
645 if (first >= max)
646 return;
647 if (first >= end)
648 return;
649 if (end > max)
650 end = max;
651 memset(ptr + first, 0, end - first);
652 }
653
654 static struct sk_buff *
655 cdc_ncm_fill_tx_frame(struct cdc_ncm_ctx *ctx, struct sk_buff *skb)
656 {
657 struct sk_buff *skb_out;
658 u32 rem;
659 u32 offset;
660 u32 last_offset;
661 u16 n = 0, index;
662 u8 ready2send = 0;
663
664 /* if there is a remaining skb, it gets priority */
665 if (skb != NULL)
666 swap(skb, ctx->tx_rem_skb);
667 else
668 ready2send = 1;
669
670 /*
671 * +----------------+
672 * | skb_out |
673 * +----------------+
674 * ^ offset
675 * ^ last_offset
676 */
677
678 /* check if we are resuming an OUT skb */
679 if (ctx->tx_curr_skb != NULL) {
680 /* pop variables */
681 skb_out = ctx->tx_curr_skb;
682 offset = ctx->tx_curr_offset;
683 last_offset = ctx->tx_curr_last_offset;
684 n = ctx->tx_curr_frame_num;
685
686 } else {
687 /* reset variables */
688 skb_out = alloc_skb((ctx->tx_max + 1), GFP_ATOMIC);
689 if (skb_out == NULL) {
690 if (skb != NULL) {
691 dev_kfree_skb_any(skb);
692 ctx->netdev->stats.tx_dropped++;
693 }
694 goto exit_no_skb;
695 }
696
697 /* make room for NTH and NDP */
698 offset = ALIGN(sizeof(struct usb_cdc_ncm_nth16),
699 ctx->tx_ndp_modulus) +
700 sizeof(struct usb_cdc_ncm_ndp16) +
701 (ctx->tx_max_datagrams + 1) *
702 sizeof(struct usb_cdc_ncm_dpe16);
703
704 /* store last valid offset before alignment */
705 last_offset = offset;
706 /* align first Datagram offset correctly */
707 offset = ALIGN(offset, ctx->tx_modulus) + ctx->tx_remainder;
708 /* zero buffer till the first IP datagram */
709 cdc_ncm_zero_fill(skb_out->data, 0, offset, offset);
710 n = 0;
711 ctx->tx_curr_frame_num = 0;
712 }
713
714 for (; n < ctx->tx_max_datagrams; n++) {
715 /* check if end of transmit buffer is reached */
716 if (offset >= ctx->tx_max) {
717 ready2send = 1;
718 break;
719 }
720 /* compute maximum buffer size */
721 rem = ctx->tx_max - offset;
722
723 if (skb == NULL) {
724 skb = ctx->tx_rem_skb;
725 ctx->tx_rem_skb = NULL;
726
727 /* check for end of skb */
728 if (skb == NULL)
729 break;
730 }
731
732 if (skb->len > rem) {
733 if (n == 0) {
734 /* won't fit, MTU problem? */
735 dev_kfree_skb_any(skb);
736 skb = NULL;
737 ctx->netdev->stats.tx_dropped++;
738 } else {
739 /* no room for skb - store for later */
740 if (ctx->tx_rem_skb != NULL) {
741 dev_kfree_skb_any(ctx->tx_rem_skb);
742 ctx->netdev->stats.tx_dropped++;
743 }
744 ctx->tx_rem_skb = skb;
745 skb = NULL;
746 ready2send = 1;
747 }
748 break;
749 }
750
751 memcpy(((u8 *)skb_out->data) + offset, skb->data, skb->len);
752
753 ctx->tx_ncm.dpe16[n].wDatagramLength = cpu_to_le16(skb->len);
754 ctx->tx_ncm.dpe16[n].wDatagramIndex = cpu_to_le16(offset);
755
756 /* update offset */
757 offset += skb->len;
758
759 /* store last valid offset before alignment */
760 last_offset = offset;
761
762 /* align offset correctly */
763 offset = ALIGN(offset, ctx->tx_modulus) + ctx->tx_remainder;
764
765 /* zero padding */
766 cdc_ncm_zero_fill(skb_out->data, last_offset, offset,
767 ctx->tx_max);
768 dev_kfree_skb_any(skb);
769 skb = NULL;
770 }
771
772 /* free up any dangling skb */
773 if (skb != NULL) {
774 dev_kfree_skb_any(skb);
775 skb = NULL;
776 ctx->netdev->stats.tx_dropped++;
777 }
778
779 ctx->tx_curr_frame_num = n;
780
781 if (n == 0) {
782 /* wait for more frames */
783 /* push variables */
784 ctx->tx_curr_skb = skb_out;
785 ctx->tx_curr_offset = offset;
786 ctx->tx_curr_last_offset = last_offset;
787 goto exit_no_skb;
788
789 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) {
790 /* wait for more frames */
791 /* push variables */
792 ctx->tx_curr_skb = skb_out;
793 ctx->tx_curr_offset = offset;
794 ctx->tx_curr_last_offset = last_offset;
795 /* set the pending count */
796 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT)
797 ctx->tx_timer_pending = 2;
798 goto exit_no_skb;
799
800 } else {
801 /* frame goes out */
802 /* variables will be reset at next call */
803 }
804
805 /* check for overflow */
806 if (last_offset > ctx->tx_max)
807 last_offset = ctx->tx_max;
808
809 /* revert offset */
810 offset = last_offset;
811
812 /*
813 * If collected data size is less or equal CDC_NCM_MIN_TX_PKT bytes,
814 * we send buffers as it is. If we get more data, it would be more
815 * efficient for USB HS mobile device with DMA engine to receive a full
816 * size NTB, than canceling DMA transfer and receiving a short packet.
817 */
818 if (offset > CDC_NCM_MIN_TX_PKT)
819 offset = ctx->tx_max;
820
821 /* final zero padding */
822 cdc_ncm_zero_fill(skb_out->data, last_offset, offset, ctx->tx_max);
823
824 /* store last offset */
825 last_offset = offset;
826
827 if (((last_offset < ctx->tx_max) && ((last_offset %
828 le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0)) ||
829 (((last_offset == ctx->tx_max) && ((ctx->tx_max %
830 le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0)) &&
831 (ctx->tx_max < le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)))) {
832 /* force short packet */
833 *(((u8 *)skb_out->data) + last_offset) = 0;
834 last_offset++;
835 }
836
837 /* zero the rest of the DPEs plus the last NULL entry */
838 for (; n <= CDC_NCM_DPT_DATAGRAMS_MAX; n++) {
839 ctx->tx_ncm.dpe16[n].wDatagramLength = 0;
840 ctx->tx_ncm.dpe16[n].wDatagramIndex = 0;
841 }
842
843 /* fill out 16-bit NTB header */
844 ctx->tx_ncm.nth16.dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN);
845 ctx->tx_ncm.nth16.wHeaderLength =
846 cpu_to_le16(sizeof(ctx->tx_ncm.nth16));
847 ctx->tx_ncm.nth16.wSequence = cpu_to_le16(ctx->tx_seq);
848 ctx->tx_ncm.nth16.wBlockLength = cpu_to_le16(last_offset);
849 index = ALIGN(sizeof(struct usb_cdc_ncm_nth16), ctx->tx_ndp_modulus);
850 ctx->tx_ncm.nth16.wNdpIndex = cpu_to_le16(index);
851
852 memcpy(skb_out->data, &(ctx->tx_ncm.nth16), sizeof(ctx->tx_ncm.nth16));
853 ctx->tx_seq++;
854
855 /* fill out 16-bit NDP table */
856 ctx->tx_ncm.ndp16.dwSignature =
857 cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN);
858 rem = sizeof(ctx->tx_ncm.ndp16) + ((ctx->tx_curr_frame_num + 1) *
859 sizeof(struct usb_cdc_ncm_dpe16));
860 ctx->tx_ncm.ndp16.wLength = cpu_to_le16(rem);
861 ctx->tx_ncm.ndp16.wNextNdpIndex = 0; /* reserved */
862
863 memcpy(((u8 *)skb_out->data) + index,
864 &(ctx->tx_ncm.ndp16),
865 sizeof(ctx->tx_ncm.ndp16));
866
867 memcpy(((u8 *)skb_out->data) + index + sizeof(ctx->tx_ncm.ndp16),
868 &(ctx->tx_ncm.dpe16),
869 (ctx->tx_curr_frame_num + 1) *
870 sizeof(struct usb_cdc_ncm_dpe16));
871
872 /* set frame length */
873 skb_put(skb_out, last_offset);
874
875 /* return skb */
876 ctx->tx_curr_skb = NULL;
877 return skb_out;
878
879 exit_no_skb:
880 return NULL;
881 }
882
883 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx)
884 {
885 /* start timer, if not already started */
886 if (timer_pending(&ctx->tx_timer) == 0) {
887 ctx->tx_timer.function = &cdc_ncm_tx_timeout;
888 ctx->tx_timer.data = (unsigned long)ctx;
889 ctx->tx_timer.expires = jiffies + ((HZ + 999) / 1000);
890 add_timer(&ctx->tx_timer);
891 }
892 }
893
894 static void cdc_ncm_tx_timeout(unsigned long arg)
895 {
896 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)arg;
897 u8 restart;
898
899 spin_lock(&ctx->mtx);
900 if (ctx->tx_timer_pending != 0) {
901 ctx->tx_timer_pending--;
902 restart = 1;
903 } else {
904 restart = 0;
905 }
906
907 spin_unlock(&ctx->mtx);
908
909 if (restart) {
910 spin_lock(&ctx->mtx);
911 cdc_ncm_tx_timeout_start(ctx);
912 spin_unlock(&ctx->mtx);
913 } else if (ctx->netdev != NULL) {
914 usbnet_start_xmit(NULL, ctx->netdev);
915 }
916 }
917
918 static struct sk_buff *
919 cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
920 {
921 struct sk_buff *skb_out;
922 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
923 u8 need_timer = 0;
924
925 /*
926 * The Ethernet API we are using does not support transmitting
927 * multiple Ethernet frames in a single call. This driver will
928 * accumulate multiple Ethernet frames and send out a larger
929 * USB frame when the USB buffer is full or when a single jiffies
930 * timeout happens.
931 */
932 if (ctx == NULL)
933 goto error;
934
935 spin_lock(&ctx->mtx);
936 skb_out = cdc_ncm_fill_tx_frame(ctx, skb);
937 if (ctx->tx_curr_skb != NULL)
938 need_timer = 1;
939
940 /* Start timer, if there is a remaining skb */
941 if (need_timer)
942 cdc_ncm_tx_timeout_start(ctx);
943
944 if (skb_out)
945 dev->net->stats.tx_packets += ctx->tx_curr_frame_num;
946
947 spin_unlock(&ctx->mtx);
948 return skb_out;
949
950 error:
951 if (skb != NULL)
952 dev_kfree_skb_any(skb);
953
954 return NULL;
955 }
956
957 static int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
958 {
959 struct sk_buff *skb;
960 struct cdc_ncm_ctx *ctx;
961 int sumlen;
962 int actlen;
963 int temp;
964 int nframes;
965 int x;
966 int offset;
967
968 ctx = (struct cdc_ncm_ctx *)dev->data[0];
969 if (ctx == NULL)
970 goto error;
971
972 actlen = skb_in->len;
973 sumlen = CDC_NCM_NTB_MAX_SIZE_RX;
974
975 if (actlen < (sizeof(ctx->rx_ncm.nth16) + sizeof(ctx->rx_ncm.ndp16))) {
976 pr_debug("frame too short\n");
977 goto error;
978 }
979
980 memcpy(&(ctx->rx_ncm.nth16), ((u8 *)skb_in->data),
981 sizeof(ctx->rx_ncm.nth16));
982
983 if (le32_to_cpu(ctx->rx_ncm.nth16.dwSignature) !=
984 USB_CDC_NCM_NTH16_SIGN) {
985 pr_debug("invalid NTH16 signature <%u>\n",
986 le32_to_cpu(ctx->rx_ncm.nth16.dwSignature));
987 goto error;
988 }
989
990 temp = le16_to_cpu(ctx->rx_ncm.nth16.wBlockLength);
991 if (temp > sumlen) {
992 pr_debug("unsupported NTB block length %u/%u\n", temp, sumlen);
993 goto error;
994 }
995
996 temp = le16_to_cpu(ctx->rx_ncm.nth16.wNdpIndex);
997 if ((temp + sizeof(ctx->rx_ncm.ndp16)) > actlen) {
998 pr_debug("invalid DPT16 index\n");
999 goto error;
1000 }
1001
1002 memcpy(&(ctx->rx_ncm.ndp16), ((u8 *)skb_in->data) + temp,
1003 sizeof(ctx->rx_ncm.ndp16));
1004
1005 if (le32_to_cpu(ctx->rx_ncm.ndp16.dwSignature) !=
1006 USB_CDC_NCM_NDP16_NOCRC_SIGN) {
1007 pr_debug("invalid DPT16 signature <%u>\n",
1008 le32_to_cpu(ctx->rx_ncm.ndp16.dwSignature));
1009 goto error;
1010 }
1011
1012 if (le16_to_cpu(ctx->rx_ncm.ndp16.wLength) <
1013 USB_CDC_NCM_NDP16_LENGTH_MIN) {
1014 pr_debug("invalid DPT16 length <%u>\n",
1015 le32_to_cpu(ctx->rx_ncm.ndp16.dwSignature));
1016 goto error;
1017 }
1018
1019 nframes = ((le16_to_cpu(ctx->rx_ncm.ndp16.wLength) -
1020 sizeof(struct usb_cdc_ncm_ndp16)) /
1021 sizeof(struct usb_cdc_ncm_dpe16));
1022 nframes--; /* we process NDP entries except for the last one */
1023
1024 pr_debug("nframes = %u\n", nframes);
1025
1026 temp += sizeof(ctx->rx_ncm.ndp16);
1027
1028 if ((temp + nframes * (sizeof(struct usb_cdc_ncm_dpe16))) > actlen) {
1029 pr_debug("Invalid nframes = %d\n", nframes);
1030 goto error;
1031 }
1032
1033 if (nframes > CDC_NCM_DPT_DATAGRAMS_MAX) {
1034 pr_debug("Truncating number of frames from %u to %u\n",
1035 nframes, CDC_NCM_DPT_DATAGRAMS_MAX);
1036 nframes = CDC_NCM_DPT_DATAGRAMS_MAX;
1037 }
1038
1039 memcpy(&(ctx->rx_ncm.dpe16), ((u8 *)skb_in->data) + temp,
1040 nframes * (sizeof(struct usb_cdc_ncm_dpe16)));
1041
1042 for (x = 0; x < nframes; x++) {
1043 offset = le16_to_cpu(ctx->rx_ncm.dpe16[x].wDatagramIndex);
1044 temp = le16_to_cpu(ctx->rx_ncm.dpe16[x].wDatagramLength);
1045
1046 /*
1047 * CDC NCM ch. 3.7
1048 * All entries after first NULL entry are to be ignored
1049 */
1050 if ((offset == 0) || (temp == 0)) {
1051 if (!x)
1052 goto error; /* empty NTB */
1053 break;
1054 }
1055
1056 /* sanity checking */
1057 if (((offset + temp) > actlen) ||
1058 (temp > CDC_NCM_MAX_DATAGRAM_SIZE) || (temp < ETH_HLEN)) {
1059 pr_debug("invalid frame detected (ignored)"
1060 "offset[%u]=%u, length=%u, skb=%p\n",
1061 x, offset, temp, skb_in);
1062 if (!x)
1063 goto error;
1064 break;
1065
1066 } else {
1067 skb = skb_clone(skb_in, GFP_ATOMIC);
1068 if (!skb)
1069 goto error;
1070 skb->len = temp;
1071 skb->data = ((u8 *)skb_in->data) + offset;
1072 skb_set_tail_pointer(skb, temp);
1073 usbnet_skb_return(dev, skb);
1074 }
1075 }
1076 return 1;
1077 error:
1078 return 0;
1079 }
1080
1081 static void
1082 cdc_ncm_speed_change(struct cdc_ncm_ctx *ctx,
1083 struct usb_cdc_speed_change *data)
1084 {
1085 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate);
1086 uint32_t tx_speed = le32_to_cpu(data->ULBitRate);
1087
1088 /*
1089 * Currently the USB-NET API does not support reporting the actual
1090 * device speed. Do print it instead.
1091 */
1092 if ((tx_speed != ctx->tx_speed) || (rx_speed != ctx->rx_speed)) {
1093 ctx->tx_speed = tx_speed;
1094 ctx->rx_speed = rx_speed;
1095
1096 if ((tx_speed > 1000000) && (rx_speed > 1000000)) {
1097 printk(KERN_INFO KBUILD_MODNAME
1098 ": %s: %u mbit/s downlink "
1099 "%u mbit/s uplink\n",
1100 ctx->netdev->name,
1101 (unsigned int)(rx_speed / 1000000U),
1102 (unsigned int)(tx_speed / 1000000U));
1103 } else {
1104 printk(KERN_INFO KBUILD_MODNAME
1105 ": %s: %u kbit/s downlink "
1106 "%u kbit/s uplink\n",
1107 ctx->netdev->name,
1108 (unsigned int)(rx_speed / 1000U),
1109 (unsigned int)(tx_speed / 1000U));
1110 }
1111 }
1112 }
1113
1114 static void cdc_ncm_status(struct usbnet *dev, struct urb *urb)
1115 {
1116 struct cdc_ncm_ctx *ctx;
1117 struct usb_cdc_notification *event;
1118
1119 ctx = (struct cdc_ncm_ctx *)dev->data[0];
1120
1121 if (urb->actual_length < sizeof(*event))
1122 return;
1123
1124 /* test for split data in 8-byte chunks */
1125 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
1126 cdc_ncm_speed_change(ctx,
1127 (struct usb_cdc_speed_change *)urb->transfer_buffer);
1128 return;
1129 }
1130
1131 event = urb->transfer_buffer;
1132
1133 switch (event->bNotificationType) {
1134 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
1135 /*
1136 * According to the CDC NCM specification ch.7.1
1137 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be
1138 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE.
1139 */
1140 ctx->connected = event->wValue;
1141
1142 printk(KERN_INFO KBUILD_MODNAME ": %s: network connection:"
1143 " %sconnected\n",
1144 ctx->netdev->name, ctx->connected ? "" : "dis");
1145
1146 if (ctx->connected)
1147 netif_carrier_on(dev->net);
1148 else {
1149 netif_carrier_off(dev->net);
1150 ctx->tx_speed = ctx->rx_speed = 0;
1151 }
1152 break;
1153
1154 case USB_CDC_NOTIFY_SPEED_CHANGE:
1155 if (urb->actual_length < (sizeof(*event) +
1156 sizeof(struct usb_cdc_speed_change)))
1157 set_bit(EVENT_STS_SPLIT, &dev->flags);
1158 else
1159 cdc_ncm_speed_change(ctx,
1160 (struct usb_cdc_speed_change *) &event[1]);
1161 break;
1162
1163 default:
1164 dev_err(&dev->udev->dev, "NCM: unexpected "
1165 "notification 0x%02x!\n", event->bNotificationType);
1166 break;
1167 }
1168 }
1169
1170 static int cdc_ncm_check_connect(struct usbnet *dev)
1171 {
1172 struct cdc_ncm_ctx *ctx;
1173
1174 ctx = (struct cdc_ncm_ctx *)dev->data[0];
1175 if (ctx == NULL)
1176 return 1; /* disconnected */
1177
1178 return !ctx->connected;
1179 }
1180
1181 static int
1182 cdc_ncm_probe(struct usb_interface *udev, const struct usb_device_id *prod)
1183 {
1184 return usbnet_probe(udev, prod);
1185 }
1186
1187 static void cdc_ncm_disconnect(struct usb_interface *intf)
1188 {
1189 struct usbnet *dev = usb_get_intfdata(intf);
1190
1191 if (dev == NULL)
1192 return; /* already disconnected */
1193
1194 usbnet_disconnect(intf);
1195 }
1196
1197 static int cdc_ncm_manage_power(struct usbnet *dev, int status)
1198 {
1199 dev->intf->needs_remote_wakeup = status;
1200 return 0;
1201 }
1202
1203 static const struct driver_info cdc_ncm_info = {
1204 .description = "CDC NCM",
1205 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET,
1206 .bind = cdc_ncm_bind,
1207 .unbind = cdc_ncm_unbind,
1208 .check_connect = cdc_ncm_check_connect,
1209 .manage_power = cdc_ncm_manage_power,
1210 .status = cdc_ncm_status,
1211 .rx_fixup = cdc_ncm_rx_fixup,
1212 .tx_fixup = cdc_ncm_tx_fixup,
1213 };
1214
1215 static struct usb_driver cdc_ncm_driver = {
1216 .name = "cdc_ncm",
1217 .id_table = cdc_devs,
1218 .probe = cdc_ncm_probe,
1219 .disconnect = cdc_ncm_disconnect,
1220 .suspend = usbnet_suspend,
1221 .resume = usbnet_resume,
1222 .reset_resume = usbnet_resume,
1223 .supports_autosuspend = 1,
1224 };
1225
1226 static struct ethtool_ops cdc_ncm_ethtool_ops = {
1227 .get_drvinfo = cdc_ncm_get_drvinfo,
1228 .get_link = usbnet_get_link,
1229 .get_msglevel = usbnet_get_msglevel,
1230 .set_msglevel = usbnet_set_msglevel,
1231 .get_settings = usbnet_get_settings,
1232 .set_settings = usbnet_set_settings,
1233 .nway_reset = usbnet_nway_reset,
1234 };
1235
1236 static int __init cdc_ncm_init(void)
1237 {
1238 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION "\n");
1239 return usb_register(&cdc_ncm_driver);
1240 }
1241
1242 module_init(cdc_ncm_init);
1243
1244 static void __exit cdc_ncm_exit(void)
1245 {
1246 usb_deregister(&cdc_ncm_driver);
1247 }
1248
1249 module_exit(cdc_ncm_exit);
1250
1251 MODULE_AUTHOR("Hans Petter Selasky");
1252 MODULE_DESCRIPTION("USB CDC NCM host driver");
1253 MODULE_LICENSE("Dual BSD/GPL");
Linux with added FPC-III support