projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
net: cdc_ncm: remove ncm_parm field
[deliverable/linux.git] / drivers / net / usb / cdc_ncm.c
1 /*
2 * cdc_ncm.c
3 *
4 * Copyright (C) ST-Ericsson 2010-2012
5 * Contact: Alexey Orishko <alexey.orishko@stericsson.com>
6 * Original author: Hans Petter Selasky <hans.petter.selasky@stericsson.com>
7 *
8 * USB Host Driver for Network Control Model (NCM)
9 * http://www.usb.org/developers/devclass_docs/NCM10.zip
10 *
11 * The NCM encoding, decoding and initialization logic
12 * derives from FreeBSD 8.x. if_cdce.c and if_cdcereg.h
13 *
14 * This software is available to you under a choice of one of two
15 * licenses. You may choose this file to be licensed under the terms
16 * of the GNU General Public License (GPL) Version 2 or the 2-clause
17 * BSD license listed below:
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions
21 * are met:
22 * 1. Redistributions of source code must retain the above copyright
23 * notice, this list of conditions and the following disclaimer.
24 * 2. Redistributions in binary form must reproduce the above copyright
25 * notice, this list of conditions and the following disclaimer in the
26 * documentation and/or other materials provided with the distribution.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 */
40
41 #include <linux/module.h>
42 #include <linux/init.h>
43 #include <linux/netdevice.h>
44 #include <linux/ctype.h>
45 #include <linux/ethtool.h>
46 #include <linux/workqueue.h>
47 #include <linux/mii.h>
48 #include <linux/crc32.h>
49 #include <linux/usb.h>
50 #include <linux/hrtimer.h>
51 #include <linux/atomic.h>
52 #include <linux/usb/usbnet.h>
53 #include <linux/usb/cdc.h>
54 #include <linux/usb/cdc_ncm.h>
55
56 #define DRIVER_VERSION "14-Mar-2012"
57
58 #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM)
59 static bool prefer_mbim = true;
60 #else
61 static bool prefer_mbim;
62 #endif
63 module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR);
64 MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions");
65
66 static void cdc_ncm_txpath_bh(unsigned long param);
67 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx);
68 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer);
69 static struct usb_driver cdc_ncm_driver;
70
71 static void
72 cdc_ncm_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
73 {
74 struct usbnet *dev = netdev_priv(net);
75
76 strlcpy(info->driver, dev->driver_name, sizeof(info->driver));
77 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
78 strlcpy(info->fw_version, dev->driver_info->description,
79 sizeof(info->fw_version));
80 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
81 }
82
83 static u8 cdc_ncm_setup(struct usbnet *dev)
84 {
85 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
86 struct usb_cdc_ncm_ntb_parameters ncm_parm;
87 u32 val;
88 u8 flags;
89 u8 iface_no;
90 int err;
91 int eth_hlen;
92 u16 ntb_fmt_supported;
93 u32 min_dgram_size;
94 u32 min_hdr_size;
95
96 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
97
98 err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS,
99 USB_TYPE_CLASS | USB_DIR_IN
100 |USB_RECIP_INTERFACE,
101 0, iface_no, &ncm_parm,
102 sizeof(ncm_parm));
103 if (err < 0) {
104 pr_debug("failed GET_NTB_PARAMETERS\n");
105 return 1;
106 }
107
108 /* read correct set of parameters according to device mode */
109 ctx->rx_max = le32_to_cpu(ncm_parm.dwNtbInMaxSize);
110 ctx->tx_max = le32_to_cpu(ncm_parm.dwNtbOutMaxSize);
111 ctx->tx_remainder = le16_to_cpu(ncm_parm.wNdpOutPayloadRemainder);
112 ctx->tx_modulus = le16_to_cpu(ncm_parm.wNdpOutDivisor);
113 ctx->tx_ndp_modulus = le16_to_cpu(ncm_parm.wNdpOutAlignment);
114 /* devices prior to NCM Errata shall set this field to zero */
115 ctx->tx_max_datagrams = le16_to_cpu(ncm_parm.wNtbOutMaxDatagrams);
116 ntb_fmt_supported = le16_to_cpu(ncm_parm.bmNtbFormatsSupported);
117
118 eth_hlen = ETH_HLEN;
119 min_dgram_size = CDC_NCM_MIN_DATAGRAM_SIZE;
120 min_hdr_size = CDC_NCM_MIN_HDR_SIZE;
121 if (ctx->mbim_desc != NULL) {
122 flags = ctx->mbim_desc->bmNetworkCapabilities;
123 eth_hlen = 0;
124 min_dgram_size = CDC_MBIM_MIN_DATAGRAM_SIZE;
125 min_hdr_size = 0;
126 } else if (ctx->func_desc != NULL) {
127 flags = ctx->func_desc->bmNetworkCapabilities;
128 } else {
129 flags = 0;
130 }
131
132 pr_debug("dwNtbInMaxSize=%u dwNtbOutMaxSize=%u "
133 "wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u "
134 "wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n",
135 ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus,
136 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, flags);
137
138 /* max count of tx datagrams */
139 if ((ctx->tx_max_datagrams == 0) ||
140 (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX))
141 ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX;
142
143 /* verify maximum size of received NTB in bytes */
144 if (ctx->rx_max < USB_CDC_NCM_NTB_MIN_IN_SIZE) {
145 pr_debug("Using min receive length=%d\n",
146 USB_CDC_NCM_NTB_MIN_IN_SIZE);
147 ctx->rx_max = USB_CDC_NCM_NTB_MIN_IN_SIZE;
148 }
149
150 if (ctx->rx_max > CDC_NCM_NTB_MAX_SIZE_RX) {
151 pr_debug("Using default maximum receive length=%d\n",
152 CDC_NCM_NTB_MAX_SIZE_RX);
153 ctx->rx_max = CDC_NCM_NTB_MAX_SIZE_RX;
154 }
155
156 /* inform device about NTB input size changes */
157 if (ctx->rx_max != le32_to_cpu(ncm_parm.dwNtbInMaxSize)) {
158 __le32 dwNtbInMaxSize = cpu_to_le32(ctx->rx_max);
159
160 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE,
161 USB_TYPE_CLASS | USB_DIR_OUT
162 | USB_RECIP_INTERFACE,
163 0, iface_no, &dwNtbInMaxSize, 4);
164 if (err < 0)
165 pr_debug("Setting NTB Input Size failed\n");
166 }
167
168 /* verify maximum size of transmitted NTB in bytes */
169 if ((ctx->tx_max <
170 (min_hdr_size + min_dgram_size)) ||
171 (ctx->tx_max > CDC_NCM_NTB_MAX_SIZE_TX)) {
172 pr_debug("Using default maximum transmit length=%d\n",
173 CDC_NCM_NTB_MAX_SIZE_TX);
174 ctx->tx_max = CDC_NCM_NTB_MAX_SIZE_TX;
175
176 /* Adding a pad byte here simplifies the handling in
177 * cdc_ncm_fill_tx_frame, by making tx_max always
178 * represent the real skb max size.
179 */
180 if (ctx->tx_max % usb_maxpacket(dev->udev, dev->out, 1) == 0)
181 ctx->tx_max++;
182
183 }
184
185 /*
186 * verify that the structure alignment is:
187 * - power of two
188 * - not greater than the maximum transmit length
189 * - not less than four bytes
190 */
191 val = ctx->tx_ndp_modulus;
192
193 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
194 (val != ((-val) & val)) || (val >= ctx->tx_max)) {
195 pr_debug("Using default alignment: 4 bytes\n");
196 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
197 }
198
199 /*
200 * verify that the payload alignment is:
201 * - power of two
202 * - not greater than the maximum transmit length
203 * - not less than four bytes
204 */
205 val = ctx->tx_modulus;
206
207 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
208 (val != ((-val) & val)) || (val >= ctx->tx_max)) {
209 pr_debug("Using default transmit modulus: 4 bytes\n");
210 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
211 }
212
213 /* verify the payload remainder */
214 if (ctx->tx_remainder >= ctx->tx_modulus) {
215 pr_debug("Using default transmit remainder: 0 bytes\n");
216 ctx->tx_remainder = 0;
217 }
218
219 /* adjust TX-remainder according to NCM specification. */
220 ctx->tx_remainder = ((ctx->tx_remainder - eth_hlen) &
221 (ctx->tx_modulus - 1));
222
223 /* additional configuration */
224
225 /* set CRC Mode */
226 if (flags & USB_CDC_NCM_NCAP_CRC_MODE) {
227 err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE,
228 USB_TYPE_CLASS | USB_DIR_OUT
229 | USB_RECIP_INTERFACE,
230 USB_CDC_NCM_CRC_NOT_APPENDED,
231 iface_no, NULL, 0);
232 if (err < 0)
233 pr_debug("Setting CRC mode off failed\n");
234 }
235
236 /* set NTB format, if both formats are supported */
237 if (ntb_fmt_supported & USB_CDC_NCM_NTH32_SIGN) {
238 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT,
239 USB_TYPE_CLASS | USB_DIR_OUT
240 | USB_RECIP_INTERFACE,
241 USB_CDC_NCM_NTB16_FORMAT,
242 iface_no, NULL, 0);
243 if (err < 0)
244 pr_debug("Setting NTB format to 16-bit failed\n");
245 }
246
247 ctx->max_datagram_size = min_dgram_size;
248
249 /* set Max Datagram Size (MTU) */
250 if (flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE) {
251 __le16 max_datagram_size;
252 u16 eth_max_sz;
253 if (ctx->ether_desc != NULL)
254 eth_max_sz = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
255 else if (ctx->mbim_desc != NULL)
256 eth_max_sz = le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize);
257 else
258 goto max_dgram_err;
259
260 err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE,
261 USB_TYPE_CLASS | USB_DIR_IN
262 | USB_RECIP_INTERFACE,
263 0, iface_no, &max_datagram_size, 2);
264 if (err < 0) {
265 pr_debug("GET_MAX_DATAGRAM_SIZE failed, use size=%u\n",
266 min_dgram_size);
267 } else {
268 ctx->max_datagram_size =
269 le16_to_cpu(max_datagram_size);
270 /* Check Eth descriptor value */
271 if (ctx->max_datagram_size > eth_max_sz)
272 ctx->max_datagram_size = eth_max_sz;
273
274 if (ctx->max_datagram_size > CDC_NCM_MAX_DATAGRAM_SIZE)
275 ctx->max_datagram_size = CDC_NCM_MAX_DATAGRAM_SIZE;
276
277 if (ctx->max_datagram_size < min_dgram_size)
278 ctx->max_datagram_size = min_dgram_size;
279
280 /* if value changed, update device */
281 if (ctx->max_datagram_size !=
282 le16_to_cpu(max_datagram_size)) {
283 err = usbnet_write_cmd(dev,
284 USB_CDC_SET_MAX_DATAGRAM_SIZE,
285 USB_TYPE_CLASS | USB_DIR_OUT
286 | USB_RECIP_INTERFACE,
287 0,
288 iface_no, &max_datagram_size,
289 2);
290 if (err < 0)
291 pr_debug("SET_MAX_DGRAM_SIZE failed\n");
292 }
293 }
294 }
295
296 max_dgram_err:
297 if (dev->net->mtu != (ctx->max_datagram_size - eth_hlen))
298 dev->net->mtu = ctx->max_datagram_size - eth_hlen;
299
300 return 0;
301 }
302
303 static void
304 cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf)
305 {
306 struct usb_host_endpoint *e, *in = NULL, *out = NULL;
307 u8 ep;
308
309 for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) {
310
311 e = intf->cur_altsetting->endpoint + ep;
312 switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
313 case USB_ENDPOINT_XFER_INT:
314 if (usb_endpoint_dir_in(&e->desc)) {
315 if (!dev->status)
316 dev->status = e;
317 }
318 break;
319
320 case USB_ENDPOINT_XFER_BULK:
321 if (usb_endpoint_dir_in(&e->desc)) {
322 if (!in)
323 in = e;
324 } else {
325 if (!out)
326 out = e;
327 }
328 break;
329
330 default:
331 break;
332 }
333 }
334 if (in && !dev->in)
335 dev->in = usb_rcvbulkpipe(dev->udev,
336 in->desc.bEndpointAddress &
337 USB_ENDPOINT_NUMBER_MASK);
338 if (out && !dev->out)
339 dev->out = usb_sndbulkpipe(dev->udev,
340 out->desc.bEndpointAddress &
341 USB_ENDPOINT_NUMBER_MASK);
342 }
343
344 static void cdc_ncm_free(struct cdc_ncm_ctx *ctx)
345 {
346 if (ctx == NULL)
347 return;
348
349 if (ctx->tx_rem_skb != NULL) {
350 dev_kfree_skb_any(ctx->tx_rem_skb);
351 ctx->tx_rem_skb = NULL;
352 }
353
354 if (ctx->tx_curr_skb != NULL) {
355 dev_kfree_skb_any(ctx->tx_curr_skb);
356 ctx->tx_curr_skb = NULL;
357 }
358
359 kfree(ctx);
360 }
361
362 static const struct ethtool_ops cdc_ncm_ethtool_ops = {
363 .get_drvinfo = cdc_ncm_get_drvinfo,
364 .get_link = usbnet_get_link,
365 .get_msglevel = usbnet_get_msglevel,
366 .set_msglevel = usbnet_set_msglevel,
367 .get_settings = usbnet_get_settings,
368 .set_settings = usbnet_set_settings,
369 .nway_reset = usbnet_nway_reset,
370 };
371
372 int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting)
373 {
374 struct cdc_ncm_ctx *ctx;
375 struct usb_driver *driver;
376 u8 *buf;
377 int len;
378 int temp;
379 u8 iface_no;
380
381 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
382 if (!ctx)
383 return -ENOMEM;
384
385 hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
386 ctx->tx_timer.function = &cdc_ncm_tx_timer_cb;
387 ctx->bh.data = (unsigned long)dev;
388 ctx->bh.func = cdc_ncm_txpath_bh;
389 atomic_set(&ctx->stop, 0);
390 spin_lock_init(&ctx->mtx);
391
392 /* store ctx pointer in device data field */
393 dev->data[0] = (unsigned long)ctx;
394
395 /* get some pointers */
396 driver = driver_of(intf);
397 buf = intf->cur_altsetting->extra;
398 len = intf->cur_altsetting->extralen;
399
400 /* parse through descriptors associated with control interface */
401 while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) {
402
403 if (buf[1] != USB_DT_CS_INTERFACE)
404 goto advance;
405
406 switch (buf[2]) {
407 case USB_CDC_UNION_TYPE:
408 if (buf[0] < sizeof(*(ctx->union_desc)))
409 break;
410
411 ctx->union_desc =
412 (const struct usb_cdc_union_desc *)buf;
413
414 ctx->control = usb_ifnum_to_if(dev->udev,
415 ctx->union_desc->bMasterInterface0);
416 ctx->data = usb_ifnum_to_if(dev->udev,
417 ctx->union_desc->bSlaveInterface0);
418 break;
419
420 case USB_CDC_ETHERNET_TYPE:
421 if (buf[0] < sizeof(*(ctx->ether_desc)))
422 break;
423
424 ctx->ether_desc =
425 (const struct usb_cdc_ether_desc *)buf;
426 dev->hard_mtu =
427 le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
428
429 if (dev->hard_mtu < CDC_NCM_MIN_DATAGRAM_SIZE)
430 dev->hard_mtu = CDC_NCM_MIN_DATAGRAM_SIZE;
431 else if (dev->hard_mtu > CDC_NCM_MAX_DATAGRAM_SIZE)
432 dev->hard_mtu = CDC_NCM_MAX_DATAGRAM_SIZE;
433 break;
434
435 case USB_CDC_NCM_TYPE:
436 if (buf[0] < sizeof(*(ctx->func_desc)))
437 break;
438
439 ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf;
440 break;
441
442 case USB_CDC_MBIM_TYPE:
443 if (buf[0] < sizeof(*(ctx->mbim_desc)))
444 break;
445
446 ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf;
447 break;
448
449 default:
450 break;
451 }
452 advance:
453 /* advance to next descriptor */
454 temp = buf[0];
455 buf += temp;
456 len -= temp;
457 }
458
459 /* some buggy devices have an IAD but no CDC Union */
460 if (!ctx->union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) {
461 ctx->control = intf;
462 ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1);
463 dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n");
464 }
465
466 /* check if we got everything */
467 if ((ctx->control == NULL) || (ctx->data == NULL) ||
468 ((!ctx->mbim_desc) && ((ctx->ether_desc == NULL) || (ctx->control != intf))))
469 goto error;
470
471 /* claim data interface, if different from control */
472 if (ctx->data != ctx->control) {
473 temp = usb_driver_claim_interface(driver, ctx->data, dev);
474 if (temp)
475 goto error;
476 }
477
478 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber;
479
480 /* reset data interface */
481 temp = usb_set_interface(dev->udev, iface_no, 0);
482 if (temp)
483 goto error2;
484
485 /* configure data interface */
486 temp = usb_set_interface(dev->udev, iface_no, data_altsetting);
487 if (temp)
488 goto error2;
489
490 cdc_ncm_find_endpoints(dev, ctx->data);
491 cdc_ncm_find_endpoints(dev, ctx->control);
492 if (!dev->in || !dev->out || !dev->status)
493 goto error2;
494
495 /* initialize data interface */
496 if (cdc_ncm_setup(dev))
497 goto error2;
498
499 dev->net->ethtool_ops = &cdc_ncm_ethtool_ops;
500
501 usb_set_intfdata(ctx->data, dev);
502 usb_set_intfdata(ctx->control, dev);
503
504 if (ctx->ether_desc) {
505 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress);
506 if (temp)
507 goto error2;
508 dev_info(&dev->udev->dev, "MAC-Address: %pM\n", dev->net->dev_addr);
509 }
510
511 dev->rx_urb_size = ctx->rx_max;
512
513 return 0;
514
515 error2:
516 usb_set_intfdata(ctx->control, NULL);
517 usb_set_intfdata(ctx->data, NULL);
518 if (ctx->data != ctx->control)
519 usb_driver_release_interface(driver, ctx->data);
520 error:
521 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]);
522 dev->data[0] = 0;
523 dev_info(&dev->udev->dev, "bind() failure\n");
524 return -ENODEV;
525 }
526 EXPORT_SYMBOL_GPL(cdc_ncm_bind_common);
527
528 void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf)
529 {
530 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
531 struct usb_driver *driver = driver_of(intf);
532
533 if (ctx == NULL)
534 return; /* no setup */
535
536 atomic_set(&ctx->stop, 1);
537
538 if (hrtimer_active(&ctx->tx_timer))
539 hrtimer_cancel(&ctx->tx_timer);
540
541 tasklet_kill(&ctx->bh);
542
543 /* handle devices with combined control and data interface */
544 if (ctx->control == ctx->data)
545 ctx->data = NULL;
546
547 /* disconnect master --> disconnect slave */
548 if (intf == ctx->control && ctx->data) {
549 usb_set_intfdata(ctx->data, NULL);
550 usb_driver_release_interface(driver, ctx->data);
551 ctx->data = NULL;
552
553 } else if (intf == ctx->data && ctx->control) {
554 usb_set_intfdata(ctx->control, NULL);
555 usb_driver_release_interface(driver, ctx->control);
556 ctx->control = NULL;
557 }
558
559 usb_set_intfdata(intf, NULL);
560 cdc_ncm_free(ctx);
561 }
562 EXPORT_SYMBOL_GPL(cdc_ncm_unbind);
563
564 /* Select the MBIM altsetting iff it is preferred and available,
565 * returning the number of the corresponding data interface altsetting
566 */
567 u8 cdc_ncm_select_altsetting(struct usbnet *dev, struct usb_interface *intf)
568 {
569 struct usb_host_interface *alt;
570
571 /* The MBIM spec defines a NCM compatible default altsetting,
572 * which we may have matched:
573 *
574 * "Functions that implement both NCM 1.0 and MBIM (an
575 * “NCM/MBIM function”) according to this recommendation
576 * shall provide two alternate settings for the
577 * Communication Interface. Alternate setting 0, and the
578 * associated class and endpoint descriptors, shall be
579 * constructed according to the rules given for the
580 * Communication Interface in section 5 of [USBNCM10].
581 * Alternate setting 1, and the associated class and
582 * endpoint descriptors, shall be constructed according to
583 * the rules given in section 6 (USB Device Model) of this
584 * specification."
585 */
586 if (prefer_mbim && intf->num_altsetting == 2) {
587 alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM);
588 if (alt && cdc_ncm_comm_intf_is_mbim(alt) &&
589 !usb_set_interface(dev->udev,
590 intf->cur_altsetting->desc.bInterfaceNumber,
591 CDC_NCM_COMM_ALTSETTING_MBIM))
592 return CDC_NCM_DATA_ALTSETTING_MBIM;
593 }
594 return CDC_NCM_DATA_ALTSETTING_NCM;
595 }
596 EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting);
597
598 static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf)
599 {
600 int ret;
601
602 /* MBIM backwards compatible function? */
603 cdc_ncm_select_altsetting(dev, intf);
604 if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting))
605 return -ENODEV;
606
607 /* NCM data altsetting is always 1 */
608 ret = cdc_ncm_bind_common(dev, intf, 1);
609
610 /*
611 * We should get an event when network connection is "connected" or
612 * "disconnected". Set network connection in "disconnected" state
613 * (carrier is OFF) during attach, so the IP network stack does not
614 * start IPv6 negotiation and more.
615 */
616 usbnet_link_change(dev, 0, 0);
617 return ret;
618 }
619
620 static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max)
621 {
622 size_t align = ALIGN(skb->len, modulus) - skb->len + remainder;
623
624 if (skb->len + align > max)
625 align = max - skb->len;
626 if (align && skb_tailroom(skb) >= align)
627 memset(skb_put(skb, align), 0, align);
628 }
629
630 /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly
631 * allocating a new one within skb
632 */
633 static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve)
634 {
635 struct usb_cdc_ncm_ndp16 *ndp16 = NULL;
636 struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data;
637 size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex);
638
639 /* follow the chain of NDPs, looking for a match */
640 while (ndpoffset) {
641 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset);
642 if (ndp16->dwSignature == sign)
643 return ndp16;
644 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
645 }
646
647 /* align new NDP */
648 cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max);
649
650 /* verify that there is room for the NDP and the datagram (reserve) */
651 if ((ctx->tx_max - skb->len - reserve) < CDC_NCM_NDP_SIZE)
652 return NULL;
653
654 /* link to it */
655 if (ndp16)
656 ndp16->wNextNdpIndex = cpu_to_le16(skb->len);
657 else
658 nth16->wNdpIndex = cpu_to_le16(skb->len);
659
660 /* push a new empty NDP */
661 ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, CDC_NCM_NDP_SIZE), 0, CDC_NCM_NDP_SIZE);
662 ndp16->dwSignature = sign;
663 ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16));
664 return ndp16;
665 }
666
667 struct sk_buff *
668 cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign)
669 {
670 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
671 struct usb_cdc_ncm_nth16 *nth16;
672 struct usb_cdc_ncm_ndp16 *ndp16;
673 struct sk_buff *skb_out;
674 u16 n = 0, index, ndplen;
675 u8 ready2send = 0;
676
677 /* if there is a remaining skb, it gets priority */
678 if (skb != NULL) {
679 swap(skb, ctx->tx_rem_skb);
680 swap(sign, ctx->tx_rem_sign);
681 } else {
682 ready2send = 1;
683 }
684
685 /* check if we are resuming an OUT skb */
686 skb_out = ctx->tx_curr_skb;
687
688 /* allocate a new OUT skb */
689 if (!skb_out) {
690 skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC);
691 if (skb_out == NULL) {
692 if (skb != NULL) {
693 dev_kfree_skb_any(skb);
694 dev->net->stats.tx_dropped++;
695 }
696 goto exit_no_skb;
697 }
698 /* fill out the initial 16-bit NTB header */
699 nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16));
700 nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN);
701 nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16));
702 nth16->wSequence = cpu_to_le16(ctx->tx_seq++);
703
704 /* count total number of frames in this NTB */
705 ctx->tx_curr_frame_num = 0;
706 }
707
708 for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) {
709 /* send any remaining skb first */
710 if (skb == NULL) {
711 skb = ctx->tx_rem_skb;
712 sign = ctx->tx_rem_sign;
713 ctx->tx_rem_skb = NULL;
714
715 /* check for end of skb */
716 if (skb == NULL)
717 break;
718 }
719
720 /* get the appropriate NDP for this skb */
721 ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder);
722
723 /* align beginning of next frame */
724 cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max);
725
726 /* check if we had enough room left for both NDP and frame */
727 if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) {
728 if (n == 0) {
729 /* won't fit, MTU problem? */
730 dev_kfree_skb_any(skb);
731 skb = NULL;
732 dev->net->stats.tx_dropped++;
733 } else {
734 /* no room for skb - store for later */
735 if (ctx->tx_rem_skb != NULL) {
736 dev_kfree_skb_any(ctx->tx_rem_skb);
737 dev->net->stats.tx_dropped++;
738 }
739 ctx->tx_rem_skb = skb;
740 ctx->tx_rem_sign = sign;
741 skb = NULL;
742 ready2send = 1;
743 }
744 break;
745 }
746
747 /* calculate frame number withing this NDP */
748 ndplen = le16_to_cpu(ndp16->wLength);
749 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1;
750
751 /* OK, add this skb */
752 ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len);
753 ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len);
754 ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16));
755 memcpy(skb_put(skb_out, skb->len), skb->data, skb->len);
756 dev_kfree_skb_any(skb);
757 skb = NULL;
758
759 /* send now if this NDP is full */
760 if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) {
761 ready2send = 1;
762 break;
763 }
764 }
765
766 /* free up any dangling skb */
767 if (skb != NULL) {
768 dev_kfree_skb_any(skb);
769 skb = NULL;
770 dev->net->stats.tx_dropped++;
771 }
772
773 ctx->tx_curr_frame_num = n;
774
775 if (n == 0) {
776 /* wait for more frames */
777 /* push variables */
778 ctx->tx_curr_skb = skb_out;
779 goto exit_no_skb;
780
781 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) {
782 /* wait for more frames */
783 /* push variables */
784 ctx->tx_curr_skb = skb_out;
785 /* set the pending count */
786 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT)
787 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT;
788 goto exit_no_skb;
789
790 } else {
791 /* frame goes out */
792 /* variables will be reset at next call */
793 }
794
795 /* If collected data size is less or equal CDC_NCM_MIN_TX_PKT
796 * bytes, we send buffers as it is. If we get more data, it
797 * would be more efficient for USB HS mobile device with DMA
798 * engine to receive a full size NTB, than canceling DMA
799 * transfer and receiving a short packet.
800 */
801 if (skb_out->len > CDC_NCM_MIN_TX_PKT)
802 memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0,
803 ctx->tx_max - skb_out->len);
804 else if ((skb_out->len % dev->maxpacket) == 0)
805 *skb_put(skb_out, 1) = 0; /* force short packet */
806
807 /* set final frame length */
808 nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data;
809 nth16->wBlockLength = cpu_to_le16(skb_out->len);
810
811 /* return skb */
812 ctx->tx_curr_skb = NULL;
813 dev->net->stats.tx_packets += ctx->tx_curr_frame_num;
814 return skb_out;
815
816 exit_no_skb:
817 /* Start timer, if there is a remaining skb */
818 if (ctx->tx_curr_skb != NULL)
819 cdc_ncm_tx_timeout_start(ctx);
820 return NULL;
821 }
822 EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame);
823
824 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx)
825 {
826 /* start timer, if not already started */
827 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop)))
828 hrtimer_start(&ctx->tx_timer,
829 ktime_set(0, CDC_NCM_TIMER_INTERVAL),
830 HRTIMER_MODE_REL);
831 }
832
833 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer)
834 {
835 struct cdc_ncm_ctx *ctx =
836 container_of(timer, struct cdc_ncm_ctx, tx_timer);
837
838 if (!atomic_read(&ctx->stop))
839 tasklet_schedule(&ctx->bh);
840 return HRTIMER_NORESTART;
841 }
842
843 static void cdc_ncm_txpath_bh(unsigned long param)
844 {
845 struct usbnet *dev = (struct usbnet *)param;
846 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
847
848 spin_lock_bh(&ctx->mtx);
849 if (ctx->tx_timer_pending != 0) {
850 ctx->tx_timer_pending--;
851 cdc_ncm_tx_timeout_start(ctx);
852 spin_unlock_bh(&ctx->mtx);
853 } else if (dev->net != NULL) {
854 spin_unlock_bh(&ctx->mtx);
855 netif_tx_lock_bh(dev->net);
856 usbnet_start_xmit(NULL, dev->net);
857 netif_tx_unlock_bh(dev->net);
858 } else {
859 spin_unlock_bh(&ctx->mtx);
860 }
861 }
862
863 static struct sk_buff *
864 cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
865 {
866 struct sk_buff *skb_out;
867 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
868
869 /*
870 * The Ethernet API we are using does not support transmitting
871 * multiple Ethernet frames in a single call. This driver will
872 * accumulate multiple Ethernet frames and send out a larger
873 * USB frame when the USB buffer is full or when a single jiffies
874 * timeout happens.
875 */
876 if (ctx == NULL)
877 goto error;
878
879 spin_lock_bh(&ctx->mtx);
880 skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN));
881 spin_unlock_bh(&ctx->mtx);
882 return skb_out;
883
884 error:
885 if (skb != NULL)
886 dev_kfree_skb_any(skb);
887
888 return NULL;
889 }
890
891 /* verify NTB header and return offset of first NDP, or negative error */
892 int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in)
893 {
894 struct usb_cdc_ncm_nth16 *nth16;
895 int len;
896 int ret = -EINVAL;
897
898 if (ctx == NULL)
899 goto error;
900
901 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) +
902 sizeof(struct usb_cdc_ncm_ndp16))) {
903 pr_debug("frame too short\n");
904 goto error;
905 }
906
907 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data;
908
909 if (le32_to_cpu(nth16->dwSignature) != USB_CDC_NCM_NTH16_SIGN) {
910 pr_debug("invalid NTH16 signature <%u>\n",
911 le32_to_cpu(nth16->dwSignature));
912 goto error;
913 }
914
915 len = le16_to_cpu(nth16->wBlockLength);
916 if (len > ctx->rx_max) {
917 pr_debug("unsupported NTB block length %u/%u\n", len,
918 ctx->rx_max);
919 goto error;
920 }
921
922 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) &&
923 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) &&
924 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) {
925 pr_debug("sequence number glitch prev=%d curr=%d\n",
926 ctx->rx_seq, le16_to_cpu(nth16->wSequence));
927 }
928 ctx->rx_seq = le16_to_cpu(nth16->wSequence);
929
930 ret = le16_to_cpu(nth16->wNdpIndex);
931 error:
932 return ret;
933 }
934 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16);
935
936 /* verify NDP header and return number of datagrams, or negative error */
937 int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset)
938 {
939 struct usb_cdc_ncm_ndp16 *ndp16;
940 int ret = -EINVAL;
941
942 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) {
943 pr_debug("invalid NDP offset <%u>\n", ndpoffset);
944 goto error;
945 }
946 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
947
948 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) {
949 pr_debug("invalid DPT16 length <%u>\n",
950 le32_to_cpu(ndp16->dwSignature));
951 goto error;
952 }
953
954 ret = ((le16_to_cpu(ndp16->wLength) -
955 sizeof(struct usb_cdc_ncm_ndp16)) /
956 sizeof(struct usb_cdc_ncm_dpe16));
957 ret--; /* we process NDP entries except for the last one */
958
959 if ((sizeof(struct usb_cdc_ncm_ndp16) + ret * (sizeof(struct usb_cdc_ncm_dpe16))) >
960 skb_in->len) {
961 pr_debug("Invalid nframes = %d\n", ret);
962 ret = -EINVAL;
963 }
964
965 error:
966 return ret;
967 }
968 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16);
969
970 static int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
971 {
972 struct sk_buff *skb;
973 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
974 int len;
975 int nframes;
976 int x;
977 int offset;
978 struct usb_cdc_ncm_ndp16 *ndp16;
979 struct usb_cdc_ncm_dpe16 *dpe16;
980 int ndpoffset;
981 int loopcount = 50; /* arbitrary max preventing infinite loop */
982
983 ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in);
984 if (ndpoffset < 0)
985 goto error;
986
987 next_ndp:
988 nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset);
989 if (nframes < 0)
990 goto error;
991
992 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
993
994 if (le32_to_cpu(ndp16->dwSignature) != USB_CDC_NCM_NDP16_NOCRC_SIGN) {
995 pr_debug("invalid DPT16 signature <%u>\n",
996 le32_to_cpu(ndp16->dwSignature));
997 goto err_ndp;
998 }
999 dpe16 = ndp16->dpe16;
1000
1001 for (x = 0; x < nframes; x++, dpe16++) {
1002 offset = le16_to_cpu(dpe16->wDatagramIndex);
1003 len = le16_to_cpu(dpe16->wDatagramLength);
1004
1005 /*
1006 * CDC NCM ch. 3.7
1007 * All entries after first NULL entry are to be ignored
1008 */
1009 if ((offset == 0) || (len == 0)) {
1010 if (!x)
1011 goto err_ndp; /* empty NTB */
1012 break;
1013 }
1014
1015 /* sanity checking */
1016 if (((offset + len) > skb_in->len) ||
1017 (len > ctx->rx_max) || (len < ETH_HLEN)) {
1018 pr_debug("invalid frame detected (ignored)"
1019 "offset[%u]=%u, length=%u, skb=%p\n",
1020 x, offset, len, skb_in);
1021 if (!x)
1022 goto err_ndp;
1023 break;
1024
1025 } else {
1026 skb = skb_clone(skb_in, GFP_ATOMIC);
1027 if (!skb)
1028 goto error;
1029 skb->len = len;
1030 skb->data = ((u8 *)skb_in->data) + offset;
1031 skb_set_tail_pointer(skb, len);
1032 usbnet_skb_return(dev, skb);
1033 }
1034 }
1035 err_ndp:
1036 /* are there more NDPs to process? */
1037 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
1038 if (ndpoffset && loopcount--)
1039 goto next_ndp;
1040
1041 return 1;
1042 error:
1043 return 0;
1044 }
1045
1046 static void
1047 cdc_ncm_speed_change(struct usbnet *dev,
1048 struct usb_cdc_speed_change *data)
1049 {
1050 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate);
1051 uint32_t tx_speed = le32_to_cpu(data->ULBitRate);
1052
1053 /*
1054 * Currently the USB-NET API does not support reporting the actual
1055 * device speed. Do print it instead.
1056 */
1057 if ((tx_speed > 1000000) && (rx_speed > 1000000)) {
1058 printk(KERN_INFO KBUILD_MODNAME
1059 ": %s: %u mbit/s downlink "
1060 "%u mbit/s uplink\n",
1061 dev->net->name,
1062 (unsigned int)(rx_speed / 1000000U),
1063 (unsigned int)(tx_speed / 1000000U));
1064 } else {
1065 printk(KERN_INFO KBUILD_MODNAME
1066 ": %s: %u kbit/s downlink "
1067 "%u kbit/s uplink\n",
1068 dev->net->name,
1069 (unsigned int)(rx_speed / 1000U),
1070 (unsigned int)(tx_speed / 1000U));
1071 }
1072 }
1073
1074 static void cdc_ncm_status(struct usbnet *dev, struct urb *urb)
1075 {
1076 struct cdc_ncm_ctx *ctx;
1077 struct usb_cdc_notification *event;
1078
1079 ctx = (struct cdc_ncm_ctx *)dev->data[0];
1080
1081 if (urb->actual_length < sizeof(*event))
1082 return;
1083
1084 /* test for split data in 8-byte chunks */
1085 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
1086 cdc_ncm_speed_change(dev,
1087 (struct usb_cdc_speed_change *)urb->transfer_buffer);
1088 return;
1089 }
1090
1091 event = urb->transfer_buffer;
1092
1093 switch (event->bNotificationType) {
1094 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
1095 /*
1096 * According to the CDC NCM specification ch.7.1
1097 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be
1098 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE.
1099 */
1100 ctx->connected = le16_to_cpu(event->wValue);
1101
1102 printk(KERN_INFO KBUILD_MODNAME ": %s: network connection:"
1103 " %sconnected\n",
1104 dev->net->name, ctx->connected ? "" : "dis");
1105
1106 usbnet_link_change(dev, ctx->connected, 0);
1107 break;
1108
1109 case USB_CDC_NOTIFY_SPEED_CHANGE:
1110 if (urb->actual_length < (sizeof(*event) +
1111 sizeof(struct usb_cdc_speed_change)))
1112 set_bit(EVENT_STS_SPLIT, &dev->flags);
1113 else
1114 cdc_ncm_speed_change(dev,
1115 (struct usb_cdc_speed_change *)&event[1]);
1116 break;
1117
1118 default:
1119 dev_dbg(&dev->udev->dev,
1120 "NCM: unexpected notification 0x%02x!\n",
1121 event->bNotificationType);
1122 break;
1123 }
1124 }
1125
1126 static int cdc_ncm_check_connect(struct usbnet *dev)
1127 {
1128 struct cdc_ncm_ctx *ctx;
1129
1130 ctx = (struct cdc_ncm_ctx *)dev->data[0];
1131 if (ctx == NULL)
1132 return 1; /* disconnected */
1133
1134 return !ctx->connected;
1135 }
1136
1137 static int
1138 cdc_ncm_probe(struct usb_interface *udev, const struct usb_device_id *prod)
1139 {
1140 return usbnet_probe(udev, prod);
1141 }
1142
1143 static void cdc_ncm_disconnect(struct usb_interface *intf)
1144 {
1145 struct usbnet *dev = usb_get_intfdata(intf);
1146
1147 if (dev == NULL)
1148 return; /* already disconnected */
1149
1150 usbnet_disconnect(intf);
1151 }
1152
1153 static const struct driver_info cdc_ncm_info = {
1154 .description = "CDC NCM",
1155 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET,
1156 .bind = cdc_ncm_bind,
1157 .unbind = cdc_ncm_unbind,
1158 .check_connect = cdc_ncm_check_connect,
1159 .manage_power = usbnet_manage_power,
1160 .status = cdc_ncm_status,
1161 .rx_fixup = cdc_ncm_rx_fixup,
1162 .tx_fixup = cdc_ncm_tx_fixup,
1163 };
1164
1165 /* Same as cdc_ncm_info, but with FLAG_WWAN */
1166 static const struct driver_info wwan_info = {
1167 .description = "Mobile Broadband Network Device",
1168 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
1169 | FLAG_WWAN,
1170 .bind = cdc_ncm_bind,
1171 .unbind = cdc_ncm_unbind,
1172 .check_connect = cdc_ncm_check_connect,
1173 .manage_power = usbnet_manage_power,
1174 .status = cdc_ncm_status,
1175 .rx_fixup = cdc_ncm_rx_fixup,
1176 .tx_fixup = cdc_ncm_tx_fixup,
1177 };
1178
1179 /* Same as wwan_info, but with FLAG_NOARP */
1180 static const struct driver_info wwan_noarp_info = {
1181 .description = "Mobile Broadband Network Device (NO ARP)",
1182 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
1183 | FLAG_WWAN | FLAG_NOARP,
1184 .bind = cdc_ncm_bind,
1185 .unbind = cdc_ncm_unbind,
1186 .check_connect = cdc_ncm_check_connect,
1187 .manage_power = usbnet_manage_power,
1188 .status = cdc_ncm_status,
1189 .rx_fixup = cdc_ncm_rx_fixup,
1190 .tx_fixup = cdc_ncm_tx_fixup,
1191 };
1192
1193 static const struct usb_device_id cdc_devs[] = {
1194 /* Ericsson MBM devices like F5521gw */
1195 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1196 | USB_DEVICE_ID_MATCH_VENDOR,
1197 .idVendor = 0x0bdb,
1198 .bInterfaceClass = USB_CLASS_COMM,
1199 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1200 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1201 .driver_info = (unsigned long) &wwan_info,
1202 },
1203
1204 /* Dell branded MBM devices like DW5550 */
1205 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1206 | USB_DEVICE_ID_MATCH_VENDOR,
1207 .idVendor = 0x413c,
1208 .bInterfaceClass = USB_CLASS_COMM,
1209 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1210 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1211 .driver_info = (unsigned long) &wwan_info,
1212 },
1213
1214 /* Toshiba branded MBM devices */
1215 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1216 | USB_DEVICE_ID_MATCH_VENDOR,
1217 .idVendor = 0x0930,
1218 .bInterfaceClass = USB_CLASS_COMM,
1219 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1220 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1221 .driver_info = (unsigned long) &wwan_info,
1222 },
1223
1224 /* tag Huawei devices as wwan */
1225 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1,
1226 USB_CLASS_COMM,
1227 USB_CDC_SUBCLASS_NCM,
1228 USB_CDC_PROTO_NONE),
1229 .driver_info = (unsigned long)&wwan_info,
1230 },
1231
1232 /* Huawei NCM devices disguised as vendor specific */
1233 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x16),
1234 .driver_info = (unsigned long)&wwan_info,
1235 },
1236 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x46),
1237 .driver_info = (unsigned long)&wwan_info,
1238 },
1239 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x76),
1240 .driver_info = (unsigned long)&wwan_info,
1241 },
1242
1243 /* Infineon(now Intel) HSPA Modem platform */
1244 { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443,
1245 USB_CLASS_COMM,
1246 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1247 .driver_info = (unsigned long)&wwan_noarp_info,
1248 },
1249
1250 /* Generic CDC-NCM devices */
1251 { USB_INTERFACE_INFO(USB_CLASS_COMM,
1252 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1253 .driver_info = (unsigned long)&cdc_ncm_info,
1254 },
1255 {
1256 },
1257 };
1258 MODULE_DEVICE_TABLE(usb, cdc_devs);
1259
1260 static struct usb_driver cdc_ncm_driver = {
1261 .name = "cdc_ncm",
1262 .id_table = cdc_devs,
1263 .probe = cdc_ncm_probe,
1264 .disconnect = cdc_ncm_disconnect,
1265 .suspend = usbnet_suspend,
1266 .resume = usbnet_resume,
1267 .reset_resume = usbnet_resume,
1268 .supports_autosuspend = 1,
1269 .disable_hub_initiated_lpm = 1,
1270 };
1271
1272 module_usb_driver(cdc_ncm_driver);
1273
1274 MODULE_AUTHOR("Hans Petter Selasky");
1275 MODULE_DESCRIPTION("USB CDC NCM host driver");
1276 MODULE_LICENSE("Dual BSD/GPL");
Linux kernel - Deliverables
This page took 0.059424 seconds and 6 git commands to generate.