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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / net / usb / cdc_ncm.c
blobdbff290ed0e4f5ac4752efbe56eeea0fda0c419f
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/netdevice.h>
43 #include <linux/ctype.h>
44 #include <linux/ethtool.h>
45 #include <linux/workqueue.h>
46 #include <linux/mii.h>
47 #include <linux/crc32.h>
48 #include <linux/usb.h>
49 #include <linux/hrtimer.h>
50 #include <linux/atomic.h>
51 #include <linux/usb/usbnet.h>
52 #include <linux/usb/cdc.h>
53 #include <linux/usb/cdc_ncm.h>
54
55 #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM)
56 static bool prefer_mbim = true;
57 #else
58 static bool prefer_mbim;
59 #endif
60 module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR);
61 MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions");
62
63 static void cdc_ncm_txpath_bh(unsigned long param);
64 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx);
65 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer);
66 static struct usb_driver cdc_ncm_driver;
67
68 static int cdc_ncm_setup(struct usbnet *dev)
69 {
70 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
71 struct usb_cdc_ncm_ntb_parameters ncm_parm;
72 u32 val;
73 u8 flags;
74 u8 iface_no;
75 int err;
76 int eth_hlen;
77 u16 ntb_fmt_supported;
78 __le16 max_datagram_size;
79
80 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
81
82 err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS,
83 USB_TYPE_CLASS | USB_DIR_IN
84 |USB_RECIP_INTERFACE,
85 0, iface_no, &ncm_parm,
86 sizeof(ncm_parm));
87 if (err < 0) {
88 dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n");
89 return err; /* GET_NTB_PARAMETERS is required */
90 }
91
92 /* read correct set of parameters according to device mode */
93 ctx->rx_max = le32_to_cpu(ncm_parm.dwNtbInMaxSize);
94 ctx->tx_max = le32_to_cpu(ncm_parm.dwNtbOutMaxSize);
95 ctx->tx_remainder = le16_to_cpu(ncm_parm.wNdpOutPayloadRemainder);
96 ctx->tx_modulus = le16_to_cpu(ncm_parm.wNdpOutDivisor);
97 ctx->tx_ndp_modulus = le16_to_cpu(ncm_parm.wNdpOutAlignment);
98 /* devices prior to NCM Errata shall set this field to zero */
99 ctx->tx_max_datagrams = le16_to_cpu(ncm_parm.wNtbOutMaxDatagrams);
100 ntb_fmt_supported = le16_to_cpu(ncm_parm.bmNtbFormatsSupported);
101
102 /* there are some minor differences in NCM and MBIM defaults */
103 if (cdc_ncm_comm_intf_is_mbim(ctx->control->cur_altsetting)) {
104 if (!ctx->mbim_desc)
105 return -EINVAL;
106 eth_hlen = 0;
107 flags = ctx->mbim_desc->bmNetworkCapabilities;
108 ctx->max_datagram_size = le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize);
109 if (ctx->max_datagram_size < CDC_MBIM_MIN_DATAGRAM_SIZE)
110 ctx->max_datagram_size = CDC_MBIM_MIN_DATAGRAM_SIZE;
111 } else {
112 if (!ctx->func_desc)
113 return -EINVAL;
114 eth_hlen = ETH_HLEN;
115 flags = ctx->func_desc->bmNetworkCapabilities;
116 ctx->max_datagram_size = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
117 if (ctx->max_datagram_size < CDC_NCM_MIN_DATAGRAM_SIZE)
118 ctx->max_datagram_size = CDC_NCM_MIN_DATAGRAM_SIZE;
119 }
120
121 /* common absolute max for NCM and MBIM */
122 if (ctx->max_datagram_size > CDC_NCM_MAX_DATAGRAM_SIZE)
123 ctx->max_datagram_size = CDC_NCM_MAX_DATAGRAM_SIZE;
124
125 dev_dbg(&dev->intf->dev,
126 "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n",
127 ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus,
128 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, flags);
129
130 /* max count of tx datagrams */
131 if ((ctx->tx_max_datagrams == 0) ||
132 (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX))
133 ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX;
134
135 /* verify maximum size of received NTB in bytes */
136 if (ctx->rx_max < USB_CDC_NCM_NTB_MIN_IN_SIZE) {
137 dev_dbg(&dev->intf->dev, "Using min receive length=%d\n",
138 USB_CDC_NCM_NTB_MIN_IN_SIZE);
139 ctx->rx_max = USB_CDC_NCM_NTB_MIN_IN_SIZE;
140 }
141
142 if (ctx->rx_max > CDC_NCM_NTB_MAX_SIZE_RX) {
143 dev_dbg(&dev->intf->dev, "Using default maximum receive length=%d\n",
144 CDC_NCM_NTB_MAX_SIZE_RX);
145 ctx->rx_max = CDC_NCM_NTB_MAX_SIZE_RX;
146 }
147
148 /* inform device about NTB input size changes */
149 if (ctx->rx_max != le32_to_cpu(ncm_parm.dwNtbInMaxSize)) {
150 __le32 dwNtbInMaxSize = cpu_to_le32(ctx->rx_max);
151
152 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE,
153 USB_TYPE_CLASS | USB_DIR_OUT
154 | USB_RECIP_INTERFACE,
155 0, iface_no, &dwNtbInMaxSize, 4);
156 if (err < 0)
157 dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n");
158 }
159
160 /* verify maximum size of transmitted NTB in bytes */
161 if (ctx->tx_max > CDC_NCM_NTB_MAX_SIZE_TX) {
162 dev_dbg(&dev->intf->dev, "Using default maximum transmit length=%d\n",
163 CDC_NCM_NTB_MAX_SIZE_TX);
164 ctx->tx_max = CDC_NCM_NTB_MAX_SIZE_TX;
165
166 /* Adding a pad byte here simplifies the handling in
167 * cdc_ncm_fill_tx_frame, by making tx_max always
168 * represent the real skb max size.
169 */
170 if (ctx->tx_max % usb_maxpacket(dev->udev, dev->out, 1) == 0)
171 ctx->tx_max++;
172
173 }
174
175 /*
176 * verify that the structure alignment is:
177 * - power of two
178 * - not greater than the maximum transmit length
179 * - not less than four bytes
180 */
181 val = ctx->tx_ndp_modulus;
182
183 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
184 (val != ((-val) & val)) || (val >= ctx->tx_max)) {
185 dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n");
186 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
187 }
188
189 /*
190 * verify that the payload alignment is:
191 * - power of two
192 * - not greater than the maximum transmit length
193 * - not less than four bytes
194 */
195 val = ctx->tx_modulus;
196
197 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
198 (val != ((-val) & val)) || (val >= ctx->tx_max)) {
199 dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n");
200 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
201 }
202
203 /* verify the payload remainder */
204 if (ctx->tx_remainder >= ctx->tx_modulus) {
205 dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n");
206 ctx->tx_remainder = 0;
207 }
208
209 /* adjust TX-remainder according to NCM specification. */
210 ctx->tx_remainder = ((ctx->tx_remainder - eth_hlen) &
211 (ctx->tx_modulus - 1));
212
213 /* additional configuration */
214
215 /* set CRC Mode */
216 if (flags & USB_CDC_NCM_NCAP_CRC_MODE) {
217 err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE,
218 USB_TYPE_CLASS | USB_DIR_OUT
219 | USB_RECIP_INTERFACE,
220 USB_CDC_NCM_CRC_NOT_APPENDED,
221 iface_no, NULL, 0);
222 if (err < 0)
223 dev_dbg(&dev->intf->dev, "Setting CRC mode off failed\n");
224 }
225
226 /* set NTB format, if both formats are supported */
227 if (ntb_fmt_supported & USB_CDC_NCM_NTH32_SIGN) {
228 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT,
229 USB_TYPE_CLASS | USB_DIR_OUT
230 | USB_RECIP_INTERFACE,
231 USB_CDC_NCM_NTB16_FORMAT,
232 iface_no, NULL, 0);
233 if (err < 0)
234 dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit failed\n");
235 }
236
237 /* inform the device about the selected Max Datagram Size */
238 if (!(flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE))
239 goto out;
240
241 /* read current mtu value from device */
242 err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE,
243 USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE,
244 0, iface_no, &max_datagram_size, 2);
245 if (err < 0) {
246 dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n");
247 goto out;
248 }
249
250 if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size)
251 goto out;
252
253 max_datagram_size = cpu_to_le16(ctx->max_datagram_size);
254 err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE,
255 USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE,
256 0, iface_no, &max_datagram_size, 2);
257 if (err < 0)
258 dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n");
259
260 out:
261 /* set MTU to max supported by the device if necessary */
262 if (dev->net->mtu > ctx->max_datagram_size - eth_hlen)
263 dev->net->mtu = ctx->max_datagram_size - eth_hlen;
264 return 0;
265 }
266
267 static void
268 cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf)
269 {
270 struct usb_host_endpoint *e, *in = NULL, *out = NULL;
271 u8 ep;
272
273 for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) {
274
275 e = intf->cur_altsetting->endpoint + ep;
276 switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
277 case USB_ENDPOINT_XFER_INT:
278 if (usb_endpoint_dir_in(&e->desc)) {
279 if (!dev->status)
280 dev->status = e;
281 }
282 break;
283
284 case USB_ENDPOINT_XFER_BULK:
285 if (usb_endpoint_dir_in(&e->desc)) {
286 if (!in)
287 in = e;
288 } else {
289 if (!out)
290 out = e;
291 }
292 break;
293
294 default:
295 break;
296 }
297 }
298 if (in && !dev->in)
299 dev->in = usb_rcvbulkpipe(dev->udev,
300 in->desc.bEndpointAddress &
301 USB_ENDPOINT_NUMBER_MASK);
302 if (out && !dev->out)
303 dev->out = usb_sndbulkpipe(dev->udev,
304 out->desc.bEndpointAddress &
305 USB_ENDPOINT_NUMBER_MASK);
306 }
307
308 static void cdc_ncm_free(struct cdc_ncm_ctx *ctx)
309 {
310 if (ctx == NULL)
311 return;
312
313 if (ctx->tx_rem_skb != NULL) {
314 dev_kfree_skb_any(ctx->tx_rem_skb);
315 ctx->tx_rem_skb = NULL;
316 }
317
318 if (ctx->tx_curr_skb != NULL) {
319 dev_kfree_skb_any(ctx->tx_curr_skb);
320 ctx->tx_curr_skb = NULL;
321 }
322
323 kfree(ctx);
324 }
325
326 int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting)
327 {
328 const struct usb_cdc_union_desc *union_desc = NULL;
329 struct cdc_ncm_ctx *ctx;
330 struct usb_driver *driver;
331 u8 *buf;
332 int len;
333 int temp;
334 u8 iface_no;
335
336 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
337 if (!ctx)
338 return -ENOMEM;
339
340 hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
341 ctx->tx_timer.function = &cdc_ncm_tx_timer_cb;
342 ctx->bh.data = (unsigned long)dev;
343 ctx->bh.func = cdc_ncm_txpath_bh;
344 atomic_set(&ctx->stop, 0);
345 spin_lock_init(&ctx->mtx);
346
347 /* store ctx pointer in device data field */
348 dev->data[0] = (unsigned long)ctx;
349
350 /* only the control interface can be successfully probed */
351 ctx->control = intf;
352
353 /* get some pointers */
354 driver = driver_of(intf);
355 buf = intf->cur_altsetting->extra;
356 len = intf->cur_altsetting->extralen;
357
358 /* parse through descriptors associated with control interface */
359 while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) {
360
361 if (buf[1] != USB_DT_CS_INTERFACE)
362 goto advance;
363
364 switch (buf[2]) {
365 case USB_CDC_UNION_TYPE:
366 if (buf[0] < sizeof(*union_desc))
367 break;
368
369 union_desc = (const struct usb_cdc_union_desc *)buf;
370 /* the master must be the interface we are probing */
371 if (intf->cur_altsetting->desc.bInterfaceNumber !=
372 union_desc->bMasterInterface0) {
373 dev_dbg(&intf->dev, "bogus CDC Union\n");
374 goto error;
375 }
376 ctx->data = usb_ifnum_to_if(dev->udev,
377 union_desc->bSlaveInterface0);
378 break;
379
380 case USB_CDC_ETHERNET_TYPE:
381 if (buf[0] < sizeof(*(ctx->ether_desc)))
382 break;
383
384 ctx->ether_desc =
385 (const struct usb_cdc_ether_desc *)buf;
386 break;
387
388 case USB_CDC_NCM_TYPE:
389 if (buf[0] < sizeof(*(ctx->func_desc)))
390 break;
391
392 ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf;
393 break;
394
395 case USB_CDC_MBIM_TYPE:
396 if (buf[0] < sizeof(*(ctx->mbim_desc)))
397 break;
398
399 ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf;
400 break;
401
402 default:
403 break;
404 }
405 advance:
406 /* advance to next descriptor */
407 temp = buf[0];
408 buf += temp;
409 len -= temp;
410 }
411
412 /* some buggy devices have an IAD but no CDC Union */
413 if (!union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) {
414 ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1);
415 dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n");
416 }
417
418 /* check if we got everything */
419 if (!ctx->data || (!ctx->mbim_desc && !ctx->ether_desc)) {
420 dev_dbg(&intf->dev, "CDC descriptors missing\n");
421 goto error;
422 }
423
424 /* claim data interface, if different from control */
425 if (ctx->data != ctx->control) {
426 temp = usb_driver_claim_interface(driver, ctx->data, dev);
427 if (temp) {
428 dev_dbg(&intf->dev, "failed to claim data intf\n");
429 goto error;
430 }
431 }
432
433 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber;
434
435 /* reset data interface */
436 temp = usb_set_interface(dev->udev, iface_no, 0);
437 if (temp) {
438 dev_dbg(&intf->dev, "set interface failed\n");
439 goto error2;
440 }
441
442 /* configure data interface */
443 temp = usb_set_interface(dev->udev, iface_no, data_altsetting);
444 if (temp) {
445 dev_dbg(&intf->dev, "set interface failed\n");
446 goto error2;
447 }
448
449 cdc_ncm_find_endpoints(dev, ctx->data);
450 cdc_ncm_find_endpoints(dev, ctx->control);
451 if (!dev->in || !dev->out || !dev->status) {
452 dev_dbg(&intf->dev, "failed to collect endpoints\n");
453 goto error2;
454 }
455
456 /* initialize data interface */
457 if (cdc_ncm_setup(dev)) {
458 dev_dbg(&intf->dev, "cdc_ncm_setup() failed\n");
459 goto error2;
460 }
461
462 usb_set_intfdata(ctx->data, dev);
463 usb_set_intfdata(ctx->control, dev);
464
465 if (ctx->ether_desc) {
466 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress);
467 if (temp) {
468 dev_dbg(&intf->dev, "failed to get mac address\n");
469 goto error2;
470 }
471 dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr);
472 }
473
474 /* usbnet use these values for sizing tx/rx queues */
475 dev->hard_mtu = ctx->tx_max;
476 dev->rx_urb_size = ctx->rx_max;
477
478 return 0;
479
480 error2:
481 usb_set_intfdata(ctx->control, NULL);
482 usb_set_intfdata(ctx->data, NULL);
483 if (ctx->data != ctx->control)
484 usb_driver_release_interface(driver, ctx->data);
485 error:
486 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]);
487 dev->data[0] = 0;
488 dev_info(&intf->dev, "bind() failure\n");
489 return -ENODEV;
490 }
491 EXPORT_SYMBOL_GPL(cdc_ncm_bind_common);
492
493 void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf)
494 {
495 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
496 struct usb_driver *driver = driver_of(intf);
497
498 if (ctx == NULL)
499 return; /* no setup */
500
501 atomic_set(&ctx->stop, 1);
502
503 if (hrtimer_active(&ctx->tx_timer))
504 hrtimer_cancel(&ctx->tx_timer);
505
506 tasklet_kill(&ctx->bh);
507
508 /* handle devices with combined control and data interface */
509 if (ctx->control == ctx->data)
510 ctx->data = NULL;
511
512 /* disconnect master --> disconnect slave */
513 if (intf == ctx->control && ctx->data) {
514 usb_set_intfdata(ctx->data, NULL);
515 usb_driver_release_interface(driver, ctx->data);
516 ctx->data = NULL;
517
518 } else if (intf == ctx->data && ctx->control) {
519 usb_set_intfdata(ctx->control, NULL);
520 usb_driver_release_interface(driver, ctx->control);
521 ctx->control = NULL;
522 }
523
524 usb_set_intfdata(intf, NULL);
525 cdc_ncm_free(ctx);
526 }
527 EXPORT_SYMBOL_GPL(cdc_ncm_unbind);
528
529 /* Select the MBIM altsetting iff it is preferred and available,
530 * returning the number of the corresponding data interface altsetting
531 */
532 u8 cdc_ncm_select_altsetting(struct usbnet *dev, struct usb_interface *intf)
533 {
534 struct usb_host_interface *alt;
535
536 /* The MBIM spec defines a NCM compatible default altsetting,
537 * which we may have matched:
538 *
539 * "Functions that implement both NCM 1.0 and MBIM (an
540 * “NCM/MBIM function”) according to this recommendation
541 * shall provide two alternate settings for the
542 * Communication Interface. Alternate setting 0, and the
543 * associated class and endpoint descriptors, shall be
544 * constructed according to the rules given for the
545 * Communication Interface in section 5 of [USBNCM10].
546 * Alternate setting 1, and the associated class and
547 * endpoint descriptors, shall be constructed according to
548 * the rules given in section 6 (USB Device Model) of this
549 * specification."
550 */
551 if (prefer_mbim && intf->num_altsetting == 2) {
552 alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM);
553 if (alt && cdc_ncm_comm_intf_is_mbim(alt) &&
554 !usb_set_interface(dev->udev,
555 intf->cur_altsetting->desc.bInterfaceNumber,
556 CDC_NCM_COMM_ALTSETTING_MBIM))
557 return CDC_NCM_DATA_ALTSETTING_MBIM;
558 }
559 return CDC_NCM_DATA_ALTSETTING_NCM;
560 }
561 EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting);
562
563 static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf)
564 {
565 int ret;
566
567 /* MBIM backwards compatible function? */
568 cdc_ncm_select_altsetting(dev, intf);
569 if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting))
570 return -ENODEV;
571
572 /* NCM data altsetting is always 1 */
573 ret = cdc_ncm_bind_common(dev, intf, 1);
574
575 /*
576 * We should get an event when network connection is "connected" or
577 * "disconnected". Set network connection in "disconnected" state
578 * (carrier is OFF) during attach, so the IP network stack does not
579 * start IPv6 negotiation and more.
580 */
581 usbnet_link_change(dev, 0, 0);
582 return ret;
583 }
584
585 static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max)
586 {
587 size_t align = ALIGN(skb->len, modulus) - skb->len + remainder;
588
589 if (skb->len + align > max)
590 align = max - skb->len;
591 if (align && skb_tailroom(skb) >= align)
592 memset(skb_put(skb, align), 0, align);
593 }
594
595 /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly
596 * allocating a new one within skb
597 */
598 static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve)
599 {
600 struct usb_cdc_ncm_ndp16 *ndp16 = NULL;
601 struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data;
602 size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex);
603
604 /* follow the chain of NDPs, looking for a match */
605 while (ndpoffset) {
606 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset);
607 if (ndp16->dwSignature == sign)
608 return ndp16;
609 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
610 }
611
612 /* align new NDP */
613 cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max);
614
615 /* verify that there is room for the NDP and the datagram (reserve) */
616 if ((ctx->tx_max - skb->len - reserve) < CDC_NCM_NDP_SIZE)
617 return NULL;
618
619 /* link to it */
620 if (ndp16)
621 ndp16->wNextNdpIndex = cpu_to_le16(skb->len);
622 else
623 nth16->wNdpIndex = cpu_to_le16(skb->len);
624
625 /* push a new empty NDP */
626 ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, CDC_NCM_NDP_SIZE), 0, CDC_NCM_NDP_SIZE);
627 ndp16->dwSignature = sign;
628 ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16));
629 return ndp16;
630 }
631
632 struct sk_buff *
633 cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign)
634 {
635 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
636 struct usb_cdc_ncm_nth16 *nth16;
637 struct usb_cdc_ncm_ndp16 *ndp16;
638 struct sk_buff *skb_out;
639 u16 n = 0, index, ndplen;
640 u8 ready2send = 0;
641
642 /* if there is a remaining skb, it gets priority */
643 if (skb != NULL) {
644 swap(skb, ctx->tx_rem_skb);
645 swap(sign, ctx->tx_rem_sign);
646 } else {
647 ready2send = 1;
648 }
649
650 /* check if we are resuming an OUT skb */
651 skb_out = ctx->tx_curr_skb;
652
653 /* allocate a new OUT skb */
654 if (!skb_out) {
655 skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC);
656 if (skb_out == NULL) {
657 if (skb != NULL) {
658 dev_kfree_skb_any(skb);
659 dev->net->stats.tx_dropped++;
660 }
661 goto exit_no_skb;
662 }
663 /* fill out the initial 16-bit NTB header */
664 nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16));
665 nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN);
666 nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16));
667 nth16->wSequence = cpu_to_le16(ctx->tx_seq++);
668
669 /* count total number of frames in this NTB */
670 ctx->tx_curr_frame_num = 0;
671 }
672
673 for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) {
674 /* send any remaining skb first */
675 if (skb == NULL) {
676 skb = ctx->tx_rem_skb;
677 sign = ctx->tx_rem_sign;
678 ctx->tx_rem_skb = NULL;
679
680 /* check for end of skb */
681 if (skb == NULL)
682 break;
683 }
684
685 /* get the appropriate NDP for this skb */
686 ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder);
687
688 /* align beginning of next frame */
689 cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max);
690
691 /* check if we had enough room left for both NDP and frame */
692 if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) {
693 if (n == 0) {
694 /* won't fit, MTU problem? */
695 dev_kfree_skb_any(skb);
696 skb = NULL;
697 dev->net->stats.tx_dropped++;
698 } else {
699 /* no room for skb - store for later */
700 if (ctx->tx_rem_skb != NULL) {
701 dev_kfree_skb_any(ctx->tx_rem_skb);
702 dev->net->stats.tx_dropped++;
703 }
704 ctx->tx_rem_skb = skb;
705 ctx->tx_rem_sign = sign;
706 skb = NULL;
707 ready2send = 1;
708 }
709 break;
710 }
711
712 /* calculate frame number withing this NDP */
713 ndplen = le16_to_cpu(ndp16->wLength);
714 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1;
715
716 /* OK, add this skb */
717 ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len);
718 ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len);
719 ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16));
720 memcpy(skb_put(skb_out, skb->len), skb->data, skb->len);
721 dev_kfree_skb_any(skb);
722 skb = NULL;
723
724 /* send now if this NDP is full */
725 if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) {
726 ready2send = 1;
727 break;
728 }
729 }
730
731 /* free up any dangling skb */
732 if (skb != NULL) {
733 dev_kfree_skb_any(skb);
734 skb = NULL;
735 dev->net->stats.tx_dropped++;
736 }
737
738 ctx->tx_curr_frame_num = n;
739
740 if (n == 0) {
741 /* wait for more frames */
742 /* push variables */
743 ctx->tx_curr_skb = skb_out;
744 goto exit_no_skb;
745
746 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) {
747 /* wait for more frames */
748 /* push variables */
749 ctx->tx_curr_skb = skb_out;
750 /* set the pending count */
751 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT)
752 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT;
753 goto exit_no_skb;
754
755 } else {
756 /* frame goes out */
757 /* variables will be reset at next call */
758 }
759
760 /* If collected data size is less or equal CDC_NCM_MIN_TX_PKT
761 * bytes, we send buffers as it is. If we get more data, it
762 * would be more efficient for USB HS mobile device with DMA
763 * engine to receive a full size NTB, than canceling DMA
764 * transfer and receiving a short packet.
765 *
766 * This optimization support is pointless if we end up sending
767 * a ZLP after full sized NTBs.
768 */
769 if (!(dev->driver_info->flags & FLAG_SEND_ZLP) &&
770 skb_out->len > CDC_NCM_MIN_TX_PKT)
771 memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0,
772 ctx->tx_max - skb_out->len);
773 else if ((skb_out->len % dev->maxpacket) == 0)
774 *skb_put(skb_out, 1) = 0; /* force short packet */
775
776 /* set final frame length */
777 nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data;
778 nth16->wBlockLength = cpu_to_le16(skb_out->len);
779
780 /* return skb */
781 ctx->tx_curr_skb = NULL;
782 dev->net->stats.tx_packets += ctx->tx_curr_frame_num;
783 return skb_out;
784
785 exit_no_skb:
786 /* Start timer, if there is a remaining skb */
787 if (ctx->tx_curr_skb != NULL)
788 cdc_ncm_tx_timeout_start(ctx);
789 return NULL;
790 }
791 EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame);
792
793 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx)
794 {
795 /* start timer, if not already started */
796 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop)))
797 hrtimer_start(&ctx->tx_timer,
798 ktime_set(0, CDC_NCM_TIMER_INTERVAL),
799 HRTIMER_MODE_REL);
800 }
801
802 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer)
803 {
804 struct cdc_ncm_ctx *ctx =
805 container_of(timer, struct cdc_ncm_ctx, tx_timer);
806
807 if (!atomic_read(&ctx->stop))
808 tasklet_schedule(&ctx->bh);
809 return HRTIMER_NORESTART;
810 }
811
812 static void cdc_ncm_txpath_bh(unsigned long param)
813 {
814 struct usbnet *dev = (struct usbnet *)param;
815 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
816
817 spin_lock_bh(&ctx->mtx);
818 if (ctx->tx_timer_pending != 0) {
819 ctx->tx_timer_pending--;
820 cdc_ncm_tx_timeout_start(ctx);
821 spin_unlock_bh(&ctx->mtx);
822 } else if (dev->net != NULL) {
823 spin_unlock_bh(&ctx->mtx);
824 netif_tx_lock_bh(dev->net);
825 usbnet_start_xmit(NULL, dev->net);
826 netif_tx_unlock_bh(dev->net);
827 } else {
828 spin_unlock_bh(&ctx->mtx);
829 }
830 }
831
832 struct sk_buff *
833 cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
834 {
835 struct sk_buff *skb_out;
836 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
837
838 /*
839 * The Ethernet API we are using does not support transmitting
840 * multiple Ethernet frames in a single call. This driver will
841 * accumulate multiple Ethernet frames and send out a larger
842 * USB frame when the USB buffer is full or when a single jiffies
843 * timeout happens.
844 */
845 if (ctx == NULL)
846 goto error;
847
848 spin_lock_bh(&ctx->mtx);
849 skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN));
850 spin_unlock_bh(&ctx->mtx);
851 return skb_out;
852
853 error:
854 if (skb != NULL)
855 dev_kfree_skb_any(skb);
856
857 return NULL;
858 }
859 EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup);
860
861 /* verify NTB header and return offset of first NDP, or negative error */
862 int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in)
863 {
864 struct usbnet *dev = netdev_priv(skb_in->dev);
865 struct usb_cdc_ncm_nth16 *nth16;
866 int len;
867 int ret = -EINVAL;
868
869 if (ctx == NULL)
870 goto error;
871
872 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) +
873 sizeof(struct usb_cdc_ncm_ndp16))) {
874 netif_dbg(dev, rx_err, dev->net, "frame too short\n");
875 goto error;
876 }
877
878 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data;
879
880 if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) {
881 netif_dbg(dev, rx_err, dev->net,
882 "invalid NTH16 signature <%#010x>\n",
883 le32_to_cpu(nth16->dwSignature));
884 goto error;
885 }
886
887 len = le16_to_cpu(nth16->wBlockLength);
888 if (len > ctx->rx_max) {
889 netif_dbg(dev, rx_err, dev->net,
890 "unsupported NTB block length %u/%u\n", len,
891 ctx->rx_max);
892 goto error;
893 }
894
895 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) &&
896 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) &&
897 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) {
898 netif_dbg(dev, rx_err, dev->net,
899 "sequence number glitch prev=%d curr=%d\n",
900 ctx->rx_seq, le16_to_cpu(nth16->wSequence));
901 }
902 ctx->rx_seq = le16_to_cpu(nth16->wSequence);
903
904 ret = le16_to_cpu(nth16->wNdpIndex);
905 error:
906 return ret;
907 }
908 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16);
909
910 /* verify NDP header and return number of datagrams, or negative error */
911 int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset)
912 {
913 struct usbnet *dev = netdev_priv(skb_in->dev);
914 struct usb_cdc_ncm_ndp16 *ndp16;
915 int ret = -EINVAL;
916
917 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) {
918 netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n",
919 ndpoffset);
920 goto error;
921 }
922 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
923
924 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) {
925 netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n",
926 le16_to_cpu(ndp16->wLength));
927 goto error;
928 }
929
930 ret = ((le16_to_cpu(ndp16->wLength) -
931 sizeof(struct usb_cdc_ncm_ndp16)) /
932 sizeof(struct usb_cdc_ncm_dpe16));
933 ret--; /* we process NDP entries except for the last one */
934
935 if ((sizeof(struct usb_cdc_ncm_ndp16) +
936 ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) {
937 netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret);
938 ret = -EINVAL;
939 }
940
941 error:
942 return ret;
943 }
944 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16);
945
946 int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
947 {
948 struct sk_buff *skb;
949 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
950 int len;
951 int nframes;
952 int x;
953 int offset;
954 struct usb_cdc_ncm_ndp16 *ndp16;
955 struct usb_cdc_ncm_dpe16 *dpe16;
956 int ndpoffset;
957 int loopcount = 50; /* arbitrary max preventing infinite loop */
958
959 ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in);
960 if (ndpoffset < 0)
961 goto error;
962
963 next_ndp:
964 nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset);
965 if (nframes < 0)
966 goto error;
967
968 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
969
970 if (ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) {
971 netif_dbg(dev, rx_err, dev->net,
972 "invalid DPT16 signature <%#010x>\n",
973 le32_to_cpu(ndp16->dwSignature));
974 goto err_ndp;
975 }
976 dpe16 = ndp16->dpe16;
977
978 for (x = 0; x < nframes; x++, dpe16++) {
979 offset = le16_to_cpu(dpe16->wDatagramIndex);
980 len = le16_to_cpu(dpe16->wDatagramLength);
981
982 /*
983 * CDC NCM ch. 3.7
984 * All entries after first NULL entry are to be ignored
985 */
986 if ((offset == 0) || (len == 0)) {
987 if (!x)
988 goto err_ndp; /* empty NTB */
989 break;
990 }
991
992 /* sanity checking */
993 if (((offset + len) > skb_in->len) ||
994 (len > ctx->rx_max) || (len < ETH_HLEN)) {
995 netif_dbg(dev, rx_err, dev->net,
996 "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n",
997 x, offset, len, skb_in);
998 if (!x)
999 goto err_ndp;
1000 break;
1001
1002 } else {
1003 skb = skb_clone(skb_in, GFP_ATOMIC);
1004 if (!skb)
1005 goto error;
1006 skb->len = len;
1007 skb->data = ((u8 *)skb_in->data) + offset;
1008 skb_set_tail_pointer(skb, len);
1009 usbnet_skb_return(dev, skb);
1010 }
1011 }
1012 err_ndp:
1013 /* are there more NDPs to process? */
1014 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
1015 if (ndpoffset && loopcount--)
1016 goto next_ndp;
1017
1018 return 1;
1019 error:
1020 return 0;
1021 }
1022 EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup);
1023
1024 static void
1025 cdc_ncm_speed_change(struct usbnet *dev,
1026 struct usb_cdc_speed_change *data)
1027 {
1028 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate);
1029 uint32_t tx_speed = le32_to_cpu(data->ULBitRate);
1030
1031 /*
1032 * Currently the USB-NET API does not support reporting the actual
1033 * device speed. Do print it instead.
1034 */
1035 if ((tx_speed > 1000000) && (rx_speed > 1000000)) {
1036 netif_info(dev, link, dev->net,
1037 "%u mbit/s downlink %u mbit/s uplink\n",
1038 (unsigned int)(rx_speed / 1000000U),
1039 (unsigned int)(tx_speed / 1000000U));
1040 } else {
1041 netif_info(dev, link, dev->net,
1042 "%u kbit/s downlink %u kbit/s uplink\n",
1043 (unsigned int)(rx_speed / 1000U),
1044 (unsigned int)(tx_speed / 1000U));
1045 }
1046 }
1047
1048 static void cdc_ncm_status(struct usbnet *dev, struct urb *urb)
1049 {
1050 struct cdc_ncm_ctx *ctx;
1051 struct usb_cdc_notification *event;
1052
1053 ctx = (struct cdc_ncm_ctx *)dev->data[0];
1054
1055 if (urb->actual_length < sizeof(*event))
1056 return;
1057
1058 /* test for split data in 8-byte chunks */
1059 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
1060 cdc_ncm_speed_change(dev,
1061 (struct usb_cdc_speed_change *)urb->transfer_buffer);
1062 return;
1063 }
1064
1065 event = urb->transfer_buffer;
1066
1067 switch (event->bNotificationType) {
1068 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
1069 /*
1070 * According to the CDC NCM specification ch.7.1
1071 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be
1072 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE.
1073 */
1074 ctx->connected = le16_to_cpu(event->wValue);
1075 netif_info(dev, link, dev->net,
1076 "network connection: %sconnected\n",
1077 ctx->connected ? "" : "dis");
1078 usbnet_link_change(dev, ctx->connected, 0);
1079 break;
1080
1081 case USB_CDC_NOTIFY_SPEED_CHANGE:
1082 if (urb->actual_length < (sizeof(*event) +
1083 sizeof(struct usb_cdc_speed_change)))
1084 set_bit(EVENT_STS_SPLIT, &dev->flags);
1085 else
1086 cdc_ncm_speed_change(dev,
1087 (struct usb_cdc_speed_change *)&event[1]);
1088 break;
1089
1090 default:
1091 dev_dbg(&dev->udev->dev,
1092 "NCM: unexpected notification 0x%02x!\n",
1093 event->bNotificationType);
1094 break;
1095 }
1096 }
1097
1098 static int cdc_ncm_check_connect(struct usbnet *dev)
1099 {
1100 struct cdc_ncm_ctx *ctx;
1101
1102 ctx = (struct cdc_ncm_ctx *)dev->data[0];
1103 if (ctx == NULL)
1104 return 1; /* disconnected */
1105
1106 return !ctx->connected;
1107 }
1108
1109 static const struct driver_info cdc_ncm_info = {
1110 .description = "CDC NCM",
1111 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET,
1112 .bind = cdc_ncm_bind,
1113 .unbind = cdc_ncm_unbind,
1114 .check_connect = cdc_ncm_check_connect,
1115 .manage_power = usbnet_manage_power,
1116 .status = cdc_ncm_status,
1117 .rx_fixup = cdc_ncm_rx_fixup,
1118 .tx_fixup = cdc_ncm_tx_fixup,
1119 };
1120
1121 /* Same as cdc_ncm_info, but with FLAG_WWAN */
1122 static const struct driver_info wwan_info = {
1123 .description = "Mobile Broadband Network Device",
1124 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
1125 | FLAG_WWAN,
1126 .bind = cdc_ncm_bind,
1127 .unbind = cdc_ncm_unbind,
1128 .check_connect = cdc_ncm_check_connect,
1129 .manage_power = usbnet_manage_power,
1130 .status = cdc_ncm_status,
1131 .rx_fixup = cdc_ncm_rx_fixup,
1132 .tx_fixup = cdc_ncm_tx_fixup,
1133 };
1134
1135 /* Same as wwan_info, but with FLAG_NOARP */
1136 static const struct driver_info wwan_noarp_info = {
1137 .description = "Mobile Broadband Network Device (NO ARP)",
1138 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
1139 | FLAG_WWAN | FLAG_NOARP,
1140 .bind = cdc_ncm_bind,
1141 .unbind = cdc_ncm_unbind,
1142 .check_connect = cdc_ncm_check_connect,
1143 .manage_power = usbnet_manage_power,
1144 .status = cdc_ncm_status,
1145 .rx_fixup = cdc_ncm_rx_fixup,
1146 .tx_fixup = cdc_ncm_tx_fixup,
1147 };
1148
1149 static const struct usb_device_id cdc_devs[] = {
1150 /* Ericsson MBM devices like F5521gw */
1151 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1152 | USB_DEVICE_ID_MATCH_VENDOR,
1153 .idVendor = 0x0bdb,
1154 .bInterfaceClass = USB_CLASS_COMM,
1155 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1156 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1157 .driver_info = (unsigned long) &wwan_info,
1158 },
1159
1160 /* Dell branded MBM devices like DW5550 */
1161 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1162 | USB_DEVICE_ID_MATCH_VENDOR,
1163 .idVendor = 0x413c,
1164 .bInterfaceClass = USB_CLASS_COMM,
1165 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1166 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1167 .driver_info = (unsigned long) &wwan_info,
1168 },
1169
1170 /* Toshiba branded MBM devices */
1171 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1172 | USB_DEVICE_ID_MATCH_VENDOR,
1173 .idVendor = 0x0930,
1174 .bInterfaceClass = USB_CLASS_COMM,
1175 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1176 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1177 .driver_info = (unsigned long) &wwan_info,
1178 },
1179
1180 /* tag Huawei devices as wwan */
1181 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1,
1182 USB_CLASS_COMM,
1183 USB_CDC_SUBCLASS_NCM,
1184 USB_CDC_PROTO_NONE),
1185 .driver_info = (unsigned long)&wwan_info,
1186 },
1187
1188 /* Infineon(now Intel) HSPA Modem platform */
1189 { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443,
1190 USB_CLASS_COMM,
1191 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1192 .driver_info = (unsigned long)&wwan_noarp_info,
1193 },
1194
1195 /* Generic CDC-NCM devices */
1196 { USB_INTERFACE_INFO(USB_CLASS_COMM,
1197 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1198 .driver_info = (unsigned long)&cdc_ncm_info,
1199 },
1200 {
1201 },
1202 };
1203 MODULE_DEVICE_TABLE(usb, cdc_devs);
1204
1205 static struct usb_driver cdc_ncm_driver = {
1206 .name = "cdc_ncm",
1207 .id_table = cdc_devs,
1208 .probe = usbnet_probe,
1209 .disconnect = usbnet_disconnect,
1210 .suspend = usbnet_suspend,
1211 .resume = usbnet_resume,
1212 .reset_resume = usbnet_resume,
1213 .supports_autosuspend = 1,
1214 .disable_hub_initiated_lpm = 1,
1215 };
1216
1217 module_usb_driver(cdc_ncm_driver);
1218
1219 MODULE_AUTHOR("Hans Petter Selasky");
1220 MODULE_DESCRIPTION("USB CDC NCM host driver");
1221 MODULE_LICENSE("Dual BSD/GPL");
Linux with added FPC-III support