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Merge tag 'v3.10.103' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.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 cdc_ncm_ctx *ctx)
84 {
85 u32 val;
86 u8 flags;
87 u8 iface_no;
88 int err;
89 int eth_hlen;
90 u16 ntb_fmt_supported;
91 u32 min_dgram_size;
92 u32 min_hdr_size;
93 struct usbnet *dev = netdev_priv(ctx->netdev);
94
95 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
96
97 err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS,
98 USB_TYPE_CLASS | USB_DIR_IN
99 |USB_RECIP_INTERFACE,
100 0, iface_no, &ctx->ncm_parm,
101 sizeof(ctx->ncm_parm));
102 if (err < 0) {
103 pr_debug("failed GET_NTB_PARAMETERS\n");
104 return 1;
105 }
106
107 /* read correct set of parameters according to device mode */
108 ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize);
109 ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize);
110 ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder);
111 ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor);
112 ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment);
113 /* devices prior to NCM Errata shall set this field to zero */
114 ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams);
115 ntb_fmt_supported = le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported);
116
117 eth_hlen = ETH_HLEN;
118 min_dgram_size = CDC_NCM_MIN_DATAGRAM_SIZE;
119 min_hdr_size = CDC_NCM_MIN_HDR_SIZE;
120 if (ctx->mbim_desc != NULL) {
121 flags = ctx->mbim_desc->bmNetworkCapabilities;
122 eth_hlen = 0;
123 min_dgram_size = CDC_MBIM_MIN_DATAGRAM_SIZE;
124 min_hdr_size = 0;
125 } else if (ctx->func_desc != NULL) {
126 flags = ctx->func_desc->bmNetworkCapabilities;
127 } else {
128 flags = 0;
129 }
130
131 pr_debug("dwNtbInMaxSize=%u dwNtbOutMaxSize=%u "
132 "wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u "
133 "wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n",
134 ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus,
135 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, flags);
136
137 /* max count of tx datagrams */
138 if ((ctx->tx_max_datagrams == 0) ||
139 (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX))
140 ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX;
141
142 /* verify maximum size of received NTB in bytes */
143 if (ctx->rx_max < USB_CDC_NCM_NTB_MIN_IN_SIZE) {
144 pr_debug("Using min receive length=%d\n",
145 USB_CDC_NCM_NTB_MIN_IN_SIZE);
146 ctx->rx_max = USB_CDC_NCM_NTB_MIN_IN_SIZE;
147 }
148
149 if (ctx->rx_max > CDC_NCM_NTB_MAX_SIZE_RX) {
150 pr_debug("Using default maximum receive length=%d\n",
151 CDC_NCM_NTB_MAX_SIZE_RX);
152 ctx->rx_max = CDC_NCM_NTB_MAX_SIZE_RX;
153 }
154
155 /* inform device about NTB input size changes */
156 if (ctx->rx_max != le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)) {
157 __le32 dwNtbInMaxSize = cpu_to_le32(ctx->rx_max);
158
159 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE,
160 USB_TYPE_CLASS | USB_DIR_OUT
161 | USB_RECIP_INTERFACE,
162 0, iface_no, &dwNtbInMaxSize, 4);
163 if (err < 0)
164 pr_debug("Setting NTB Input Size failed\n");
165 }
166
167 /* verify maximum size of transmitted NTB in bytes */
168 if ((ctx->tx_max <
169 (min_hdr_size + min_dgram_size)) ||
170 (ctx->tx_max > CDC_NCM_NTB_MAX_SIZE_TX)) {
171 pr_debug("Using default maximum transmit length=%d\n",
172 CDC_NCM_NTB_MAX_SIZE_TX);
173 ctx->tx_max = CDC_NCM_NTB_MAX_SIZE_TX;
174 }
175
176 /*
177 * verify that the structure alignment is:
178 * - power of two
179 * - not greater than the maximum transmit length
180 * - not less than four bytes
181 */
182 val = ctx->tx_ndp_modulus;
183
184 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
185 (val != ((-val) & val)) || (val >= ctx->tx_max)) {
186 pr_debug("Using default alignment: 4 bytes\n");
187 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
188 }
189
190 /*
191 * verify that the payload alignment is:
192 * - power of two
193 * - not greater than the maximum transmit length
194 * - not less than four bytes
195 */
196 val = ctx->tx_modulus;
197
198 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
199 (val != ((-val) & val)) || (val >= ctx->tx_max)) {
200 pr_debug("Using default transmit modulus: 4 bytes\n");
201 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
202 }
203
204 /* verify the payload remainder */
205 if (ctx->tx_remainder >= ctx->tx_modulus) {
206 pr_debug("Using default transmit remainder: 0 bytes\n");
207 ctx->tx_remainder = 0;
208 }
209
210 /* adjust TX-remainder according to NCM specification. */
211 ctx->tx_remainder = ((ctx->tx_remainder - eth_hlen) &
212 (ctx->tx_modulus - 1));
213
214 /* additional configuration */
215
216 /* set CRC Mode */
217 if (flags & USB_CDC_NCM_NCAP_CRC_MODE) {
218 err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE,
219 USB_TYPE_CLASS | USB_DIR_OUT
220 | USB_RECIP_INTERFACE,
221 USB_CDC_NCM_CRC_NOT_APPENDED,
222 iface_no, NULL, 0);
223 if (err < 0)
224 pr_debug("Setting CRC mode off failed\n");
225 }
226
227 /* set NTB format, if both formats are supported */
228 if (ntb_fmt_supported & USB_CDC_NCM_NTH32_SIGN) {
229 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT,
230 USB_TYPE_CLASS | USB_DIR_OUT
231 | USB_RECIP_INTERFACE,
232 USB_CDC_NCM_NTB16_FORMAT,
233 iface_no, NULL, 0);
234 if (err < 0)
235 pr_debug("Setting NTB format to 16-bit failed\n");
236 }
237
238 ctx->max_datagram_size = min_dgram_size;
239
240 /* set Max Datagram Size (MTU) */
241 if (flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE) {
242 __le16 max_datagram_size;
243 u16 eth_max_sz;
244 if (ctx->ether_desc != NULL)
245 eth_max_sz = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
246 else if (ctx->mbim_desc != NULL)
247 eth_max_sz = le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize);
248 else
249 goto max_dgram_err;
250
251 err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE,
252 USB_TYPE_CLASS | USB_DIR_IN
253 | USB_RECIP_INTERFACE,
254 0, iface_no, &max_datagram_size, 2);
255 if (err < 0) {
256 pr_debug("GET_MAX_DATAGRAM_SIZE failed, use size=%u\n",
257 min_dgram_size);
258 } else {
259 ctx->max_datagram_size =
260 le16_to_cpu(max_datagram_size);
261 /* Check Eth descriptor value */
262 if (ctx->max_datagram_size > eth_max_sz)
263 ctx->max_datagram_size = eth_max_sz;
264
265 if (ctx->max_datagram_size > CDC_NCM_MAX_DATAGRAM_SIZE)
266 ctx->max_datagram_size = CDC_NCM_MAX_DATAGRAM_SIZE;
267
268 if (ctx->max_datagram_size < min_dgram_size)
269 ctx->max_datagram_size = min_dgram_size;
270
271 /* if value changed, update device */
272 if (ctx->max_datagram_size !=
273 le16_to_cpu(max_datagram_size)) {
274 err = usbnet_write_cmd(dev,
275 USB_CDC_SET_MAX_DATAGRAM_SIZE,
276 USB_TYPE_CLASS | USB_DIR_OUT
277 | USB_RECIP_INTERFACE,
278 0,
279 iface_no, &max_datagram_size,
280 2);
281 if (err < 0)
282 pr_debug("SET_MAX_DGRAM_SIZE failed\n");
283 }
284 }
285 }
286
287 max_dgram_err:
288 if (ctx->netdev->mtu != (ctx->max_datagram_size - eth_hlen))
289 ctx->netdev->mtu = ctx->max_datagram_size - eth_hlen;
290
291 return 0;
292 }
293
294 static void
295 cdc_ncm_find_endpoints(struct cdc_ncm_ctx *ctx, struct usb_interface *intf)
296 {
297 struct usb_host_endpoint *e;
298 u8 ep;
299
300 for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) {
301
302 e = intf->cur_altsetting->endpoint + ep;
303 switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
304 case USB_ENDPOINT_XFER_INT:
305 if (usb_endpoint_dir_in(&e->desc)) {
306 if (ctx->status_ep == NULL)
307 ctx->status_ep = e;
308 }
309 break;
310
311 case USB_ENDPOINT_XFER_BULK:
312 if (usb_endpoint_dir_in(&e->desc)) {
313 if (ctx->in_ep == NULL)
314 ctx->in_ep = e;
315 } else {
316 if (ctx->out_ep == NULL)
317 ctx->out_ep = e;
318 }
319 break;
320
321 default:
322 break;
323 }
324 }
325 }
326
327 static void cdc_ncm_free(struct cdc_ncm_ctx *ctx)
328 {
329 if (ctx == NULL)
330 return;
331
332 if (ctx->tx_rem_skb != NULL) {
333 dev_kfree_skb_any(ctx->tx_rem_skb);
334 ctx->tx_rem_skb = NULL;
335 }
336
337 if (ctx->tx_curr_skb != NULL) {
338 dev_kfree_skb_any(ctx->tx_curr_skb);
339 ctx->tx_curr_skb = NULL;
340 }
341
342 kfree(ctx);
343 }
344
345 static const struct ethtool_ops cdc_ncm_ethtool_ops = {
346 .get_drvinfo = cdc_ncm_get_drvinfo,
347 .get_link = usbnet_get_link,
348 .get_msglevel = usbnet_get_msglevel,
349 .set_msglevel = usbnet_set_msglevel,
350 .get_settings = usbnet_get_settings,
351 .set_settings = usbnet_set_settings,
352 .nway_reset = usbnet_nway_reset,
353 };
354
355 int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting)
356 {
357 struct cdc_ncm_ctx *ctx;
358 struct usb_driver *driver;
359 u8 *buf;
360 int len;
361 int temp;
362 u8 iface_no;
363
364 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
365 if (!ctx)
366 return -ENOMEM;
367
368 hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
369 ctx->tx_timer.function = &cdc_ncm_tx_timer_cb;
370 ctx->bh.data = (unsigned long)ctx;
371 ctx->bh.func = cdc_ncm_txpath_bh;
372 atomic_set(&ctx->stop, 0);
373 spin_lock_init(&ctx->mtx);
374 ctx->netdev = dev->net;
375
376 /* store ctx pointer in device data field */
377 dev->data[0] = (unsigned long)ctx;
378
379 /* get some pointers */
380 driver = driver_of(intf);
381 buf = intf->cur_altsetting->extra;
382 len = intf->cur_altsetting->extralen;
383
384 ctx->udev = dev->udev;
385 ctx->intf = intf;
386
387 /* parse through descriptors associated with control interface */
388 while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) {
389
390 if (buf[1] != USB_DT_CS_INTERFACE)
391 goto advance;
392
393 switch (buf[2]) {
394 case USB_CDC_UNION_TYPE:
395 if (buf[0] < sizeof(*(ctx->union_desc)))
396 break;
397
398 ctx->union_desc =
399 (const struct usb_cdc_union_desc *)buf;
400
401 ctx->control = usb_ifnum_to_if(dev->udev,
402 ctx->union_desc->bMasterInterface0);
403 ctx->data = usb_ifnum_to_if(dev->udev,
404 ctx->union_desc->bSlaveInterface0);
405 break;
406
407 case USB_CDC_ETHERNET_TYPE:
408 if (buf[0] < sizeof(*(ctx->ether_desc)))
409 break;
410
411 ctx->ether_desc =
412 (const struct usb_cdc_ether_desc *)buf;
413 dev->hard_mtu =
414 le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
415
416 if (dev->hard_mtu < CDC_NCM_MIN_DATAGRAM_SIZE)
417 dev->hard_mtu = CDC_NCM_MIN_DATAGRAM_SIZE;
418 else if (dev->hard_mtu > CDC_NCM_MAX_DATAGRAM_SIZE)
419 dev->hard_mtu = CDC_NCM_MAX_DATAGRAM_SIZE;
420 break;
421
422 case USB_CDC_NCM_TYPE:
423 if (buf[0] < sizeof(*(ctx->func_desc)))
424 break;
425
426 ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf;
427 break;
428
429 case USB_CDC_MBIM_TYPE:
430 if (buf[0] < sizeof(*(ctx->mbim_desc)))
431 break;
432
433 ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf;
434 break;
435
436 default:
437 break;
438 }
439 advance:
440 /* advance to next descriptor */
441 temp = buf[0];
442 buf += temp;
443 len -= temp;
444 }
445
446 /* some buggy devices have an IAD but no CDC Union */
447 if (!ctx->union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) {
448 ctx->control = intf;
449 ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1);
450 dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n");
451 }
452
453 /* check if we got everything */
454 if ((ctx->control == NULL) || (ctx->data == NULL) ||
455 ((!ctx->mbim_desc) && ((ctx->ether_desc == NULL) || (ctx->control != intf))))
456 goto error;
457
458 /* claim data interface, if different from control */
459 if (ctx->data != ctx->control) {
460 temp = usb_driver_claim_interface(driver, ctx->data, dev);
461 if (temp)
462 goto error;
463 }
464
465 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber;
466
467 /* Reset data interface. Some devices will not reset properly
468 * unless they are configured first. Toggle the altsetting to
469 * force a reset
470 */
471 usb_set_interface(dev->udev, iface_no, data_altsetting);
472 temp = usb_set_interface(dev->udev, iface_no, 0);
473 if (temp)
474 goto error2;
475
476 /* initialize data interface */
477 if (cdc_ncm_setup(ctx))
478 goto error2;
479
480 /* Some firmwares need a pause here or they will silently fail
481 * to set up the interface properly. This value was decided
482 * empirically on a Sierra Wireless MC7455 running 02.08.02.00
483 * firmware.
484 */
485 usleep_range(10000, 20000);
486
487 /* configure data interface */
488 temp = usb_set_interface(dev->udev, iface_no, data_altsetting);
489 if (temp)
490 goto error2;
491
492 cdc_ncm_find_endpoints(ctx, ctx->data);
493 cdc_ncm_find_endpoints(ctx, ctx->control);
494
495 if ((ctx->in_ep == NULL) || (ctx->out_ep == NULL) ||
496 (ctx->status_ep == NULL))
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 usb_set_intfdata(ctx->intf, dev);
504
505 if (ctx->ether_desc) {
506 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress);
507 if (temp)
508 goto error2;
509 dev_info(&dev->udev->dev, "MAC-Address: %pM\n", dev->net->dev_addr);
510 }
511
512
513 dev->in = usb_rcvbulkpipe(dev->udev,
514 ctx->in_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
515 dev->out = usb_sndbulkpipe(dev->udev,
516 ctx->out_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
517 dev->status = ctx->status_ep;
518 dev->rx_urb_size = ctx->rx_max;
519
520 ctx->tx_speed = ctx->rx_speed = 0;
521 return 0;
522
523 error2:
524 usb_set_intfdata(ctx->control, NULL);
525 usb_set_intfdata(ctx->data, NULL);
526 if (ctx->data != ctx->control)
527 usb_driver_release_interface(driver, ctx->data);
528 error:
529 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]);
530 dev->data[0] = 0;
531 dev_info(&dev->udev->dev, "bind() failure\n");
532 return -ENODEV;
533 }
534 EXPORT_SYMBOL_GPL(cdc_ncm_bind_common);
535
536 void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf)
537 {
538 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
539 struct usb_driver *driver = driver_of(intf);
540
541 if (ctx == NULL)
542 return; /* no setup */
543
544 atomic_set(&ctx->stop, 1);
545
546 if (hrtimer_active(&ctx->tx_timer))
547 hrtimer_cancel(&ctx->tx_timer);
548
549 tasklet_kill(&ctx->bh);
550
551 /* handle devices with combined control and data interface */
552 if (ctx->control == ctx->data)
553 ctx->data = NULL;
554
555 /* disconnect master --> disconnect slave */
556 if (intf == ctx->control && ctx->data) {
557 usb_set_intfdata(ctx->data, NULL);
558 usb_driver_release_interface(driver, ctx->data);
559 ctx->data = NULL;
560
561 } else if (intf == ctx->data && ctx->control) {
562 usb_set_intfdata(ctx->control, NULL);
563 usb_driver_release_interface(driver, ctx->control);
564 ctx->control = NULL;
565 }
566
567 usb_set_intfdata(ctx->intf, NULL);
568 cdc_ncm_free(ctx);
569 }
570 EXPORT_SYMBOL_GPL(cdc_ncm_unbind);
571
572 /* Select the MBIM altsetting iff it is preferred and available,
573 * returning the number of the corresponding data interface altsetting
574 */
575 u8 cdc_ncm_select_altsetting(struct usbnet *dev, struct usb_interface *intf)
576 {
577 struct usb_host_interface *alt;
578
579 /* The MBIM spec defines a NCM compatible default altsetting,
580 * which we may have matched:
581 *
582 * "Functions that implement both NCM 1.0 and MBIM (an
583 * “NCM/MBIM function”) according to this recommendation
584 * shall provide two alternate settings for the
585 * Communication Interface. Alternate setting 0, and the
586 * associated class and endpoint descriptors, shall be
587 * constructed according to the rules given for the
588 * Communication Interface in section 5 of [USBNCM10].
589 * Alternate setting 1, and the associated class and
590 * endpoint descriptors, shall be constructed according to
591 * the rules given in section 6 (USB Device Model) of this
592 * specification."
593 */
594 if (prefer_mbim && intf->num_altsetting == 2) {
595 alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM);
596 if (alt && cdc_ncm_comm_intf_is_mbim(alt) &&
597 !usb_set_interface(dev->udev,
598 intf->cur_altsetting->desc.bInterfaceNumber,
599 CDC_NCM_COMM_ALTSETTING_MBIM))
600 return CDC_NCM_DATA_ALTSETTING_MBIM;
601 }
602 return CDC_NCM_DATA_ALTSETTING_NCM;
603 }
604 EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting);
605
606 static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf)
607 {
608 /* MBIM backwards compatible function? */
609 cdc_ncm_select_altsetting(dev, intf);
610 if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting))
611 return -ENODEV;
612
613 /* NCM data altsetting is always 1 */
614 return cdc_ncm_bind_common(dev, intf, 1);
615 }
616
617 static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max)
618 {
619 size_t align = ALIGN(skb->len, modulus) - skb->len + remainder;
620
621 if (skb->len + align > max)
622 align = max - skb->len;
623 if (align && skb_tailroom(skb) >= align)
624 memset(skb_put(skb, align), 0, align);
625 }
626
627 /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly
628 * allocating a new one within skb
629 */
630 static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve)
631 {
632 struct usb_cdc_ncm_ndp16 *ndp16 = NULL;
633 struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data;
634 size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex);
635
636 /* follow the chain of NDPs, looking for a match */
637 while (ndpoffset) {
638 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset);
639 if (ndp16->dwSignature == sign)
640 return ndp16;
641 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
642 }
643
644 /* align new NDP */
645 cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max);
646
647 /* verify that there is room for the NDP and the datagram (reserve) */
648 if ((ctx->tx_max - skb->len - reserve) < CDC_NCM_NDP_SIZE)
649 return NULL;
650
651 /* link to it */
652 if (ndp16)
653 ndp16->wNextNdpIndex = cpu_to_le16(skb->len);
654 else
655 nth16->wNdpIndex = cpu_to_le16(skb->len);
656
657 /* push a new empty NDP */
658 ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, CDC_NCM_NDP_SIZE), 0, CDC_NCM_NDP_SIZE);
659 ndp16->dwSignature = sign;
660 ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16));
661 return ndp16;
662 }
663
664 struct sk_buff *
665 cdc_ncm_fill_tx_frame(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign)
666 {
667 struct usb_cdc_ncm_nth16 *nth16;
668 struct usb_cdc_ncm_ndp16 *ndp16;
669 struct sk_buff *skb_out;
670 u16 n = 0, index, ndplen;
671 u8 ready2send = 0;
672
673 /* if there is a remaining skb, it gets priority */
674 if (skb != NULL) {
675 swap(skb, ctx->tx_rem_skb);
676 swap(sign, ctx->tx_rem_sign);
677 } else {
678 ready2send = 1;
679 }
680
681 /* check if we are resuming an OUT skb */
682 skb_out = ctx->tx_curr_skb;
683
684 /* allocate a new OUT skb */
685 if (!skb_out) {
686 skb_out = alloc_skb((ctx->tx_max + 1), GFP_ATOMIC);
687 if (skb_out == NULL) {
688 if (skb != NULL) {
689 dev_kfree_skb_any(skb);
690 ctx->netdev->stats.tx_dropped++;
691 }
692 goto exit_no_skb;
693 }
694 /* fill out the initial 16-bit NTB header */
695 nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16));
696 nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN);
697 nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16));
698 nth16->wSequence = cpu_to_le16(ctx->tx_seq++);
699
700 /* count total number of frames in this NTB */
701 ctx->tx_curr_frame_num = 0;
702 }
703
704 for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) {
705 /* send any remaining skb first */
706 if (skb == NULL) {
707 skb = ctx->tx_rem_skb;
708 sign = ctx->tx_rem_sign;
709 ctx->tx_rem_skb = NULL;
710
711 /* check for end of skb */
712 if (skb == NULL)
713 break;
714 }
715
716 /* get the appropriate NDP for this skb */
717 ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder);
718
719 /* align beginning of next frame */
720 cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max);
721
722 /* check if we had enough room left for both NDP and frame */
723 if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) {
724 if (n == 0) {
725 /* won't fit, MTU problem? */
726 dev_kfree_skb_any(skb);
727 skb = NULL;
728 ctx->netdev->stats.tx_dropped++;
729 } else {
730 /* no room for skb - store for later */
731 if (ctx->tx_rem_skb != NULL) {
732 dev_kfree_skb_any(ctx->tx_rem_skb);
733 ctx->netdev->stats.tx_dropped++;
734 }
735 ctx->tx_rem_skb = skb;
736 ctx->tx_rem_sign = sign;
737 skb = NULL;
738 ready2send = 1;
739 }
740 break;
741 }
742
743 /* calculate frame number withing this NDP */
744 ndplen = le16_to_cpu(ndp16->wLength);
745 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1;
746
747 /* OK, add this skb */
748 ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len);
749 ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len);
750 ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16));
751 memcpy(skb_put(skb_out, skb->len), skb->data, skb->len);
752 dev_kfree_skb_any(skb);
753 skb = NULL;
754
755 /* send now if this NDP is full */
756 if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) {
757 ready2send = 1;
758 break;
759 }
760 }
761
762 /* free up any dangling skb */
763 if (skb != NULL) {
764 dev_kfree_skb_any(skb);
765 skb = NULL;
766 ctx->netdev->stats.tx_dropped++;
767 }
768
769 ctx->tx_curr_frame_num = n;
770
771 if (n == 0) {
772 /* wait for more frames */
773 /* push variables */
774 ctx->tx_curr_skb = skb_out;
775 goto exit_no_skb;
776
777 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) {
778 /* wait for more frames */
779 /* push variables */
780 ctx->tx_curr_skb = skb_out;
781 /* set the pending count */
782 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT)
783 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT;
784 goto exit_no_skb;
785
786 } else {
787 /* frame goes out */
788 /* variables will be reset at next call */
789 }
790
791 /*
792 * If collected data size is less or equal CDC_NCM_MIN_TX_PKT bytes,
793 * we send buffers as it is. If we get more data, it would be more
794 * efficient for USB HS mobile device with DMA engine to receive a full
795 * size NTB, than canceling DMA transfer and receiving a short packet.
796 */
797 if (skb_out->len > CDC_NCM_MIN_TX_PKT)
798 /* final zero padding */
799 memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0, ctx->tx_max - skb_out->len);
800
801 /* do we need to prevent a ZLP? */
802 if (((skb_out->len % le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0) &&
803 (skb_out->len < le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)) && skb_tailroom(skb_out))
804 *skb_put(skb_out, 1) = 0; /* force short packet */
805
806 /* set final frame length */
807 nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data;
808 nth16->wBlockLength = cpu_to_le16(skb_out->len);
809
810 /* return skb */
811 ctx->tx_curr_skb = NULL;
812 ctx->netdev->stats.tx_packets += ctx->tx_curr_frame_num;
813 return skb_out;
814
815 exit_no_skb:
816 /* Start timer, if there is a remaining skb */
817 if (ctx->tx_curr_skb != NULL)
818 cdc_ncm_tx_timeout_start(ctx);
819 return NULL;
820 }
821 EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame);
822
823 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx)
824 {
825 /* start timer, if not already started */
826 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop)))
827 hrtimer_start(&ctx->tx_timer,
828 ktime_set(0, CDC_NCM_TIMER_INTERVAL),
829 HRTIMER_MODE_REL);
830 }
831
832 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer)
833 {
834 struct cdc_ncm_ctx *ctx =
835 container_of(timer, struct cdc_ncm_ctx, tx_timer);
836
837 if (!atomic_read(&ctx->stop))
838 tasklet_schedule(&ctx->bh);
839 return HRTIMER_NORESTART;
840 }
841
842 static void cdc_ncm_txpath_bh(unsigned long param)
843 {
844 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)param;
845
846 spin_lock_bh(&ctx->mtx);
847 if (ctx->tx_timer_pending != 0) {
848 ctx->tx_timer_pending--;
849 cdc_ncm_tx_timeout_start(ctx);
850 spin_unlock_bh(&ctx->mtx);
851 } else if (ctx->netdev != NULL) {
852 spin_unlock_bh(&ctx->mtx);
853 netif_tx_lock_bh(ctx->netdev);
854 usbnet_start_xmit(NULL, ctx->netdev);
855 netif_tx_unlock_bh(ctx->netdev);
856 } else {
857 spin_unlock_bh(&ctx->mtx);
858 }
859 }
860
861 static struct sk_buff *
862 cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
863 {
864 struct sk_buff *skb_out;
865 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
866
867 /*
868 * The Ethernet API we are using does not support transmitting
869 * multiple Ethernet frames in a single call. This driver will
870 * accumulate multiple Ethernet frames and send out a larger
871 * USB frame when the USB buffer is full or when a single jiffies
872 * timeout happens.
873 */
874 if (ctx == NULL)
875 goto error;
876
877 spin_lock_bh(&ctx->mtx);
878 skb_out = cdc_ncm_fill_tx_frame(ctx, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN));
879 spin_unlock_bh(&ctx->mtx);
880 return skb_out;
881
882 error:
883 if (skb != NULL)
884 dev_kfree_skb_any(skb);
885
886 return NULL;
887 }
888
889 /* verify NTB header and return offset of first NDP, or negative error */
890 int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in)
891 {
892 struct usb_cdc_ncm_nth16 *nth16;
893 int len;
894 int ret = -EINVAL;
895
896 if (ctx == NULL)
897 goto error;
898
899 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) +
900 sizeof(struct usb_cdc_ncm_ndp16))) {
901 pr_debug("frame too short\n");
902 goto error;
903 }
904
905 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data;
906
907 if (le32_to_cpu(nth16->dwSignature) != USB_CDC_NCM_NTH16_SIGN) {
908 pr_debug("invalid NTH16 signature <%u>\n",
909 le32_to_cpu(nth16->dwSignature));
910 goto error;
911 }
912
913 len = le16_to_cpu(nth16->wBlockLength);
914 if (len > ctx->rx_max) {
915 pr_debug("unsupported NTB block length %u/%u\n", len,
916 ctx->rx_max);
917 goto error;
918 }
919
920 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) &&
921 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) &&
922 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) {
923 pr_debug("sequence number glitch prev=%d curr=%d\n",
924 ctx->rx_seq, le16_to_cpu(nth16->wSequence));
925 }
926 ctx->rx_seq = le16_to_cpu(nth16->wSequence);
927
928 ret = le16_to_cpu(nth16->wNdpIndex);
929 error:
930 return ret;
931 }
932 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16);
933
934 /* verify NDP header and return number of datagrams, or negative error */
935 int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset)
936 {
937 struct usb_cdc_ncm_ndp16 *ndp16;
938 int ret = -EINVAL;
939
940 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) {
941 pr_debug("invalid NDP offset <%u>\n", ndpoffset);
942 goto error;
943 }
944 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
945
946 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) {
947 pr_debug("invalid DPT16 length <%u>\n",
948 le32_to_cpu(ndp16->dwSignature));
949 goto error;
950 }
951
952 ret = ((le16_to_cpu(ndp16->wLength) -
953 sizeof(struct usb_cdc_ncm_ndp16)) /
954 sizeof(struct usb_cdc_ncm_dpe16));
955 ret--; /* we process NDP entries except for the last one */
956
957 if ((sizeof(struct usb_cdc_ncm_ndp16) + ret * (sizeof(struct usb_cdc_ncm_dpe16))) >
958 skb_in->len) {
959 pr_debug("Invalid nframes = %d\n", ret);
960 ret = -EINVAL;
961 }
962
963 error:
964 return ret;
965 }
966 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16);
967
968 static int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
969 {
970 struct sk_buff *skb;
971 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
972 int len;
973 int nframes;
974 int x;
975 int offset;
976 struct usb_cdc_ncm_ndp16 *ndp16;
977 struct usb_cdc_ncm_dpe16 *dpe16;
978 int ndpoffset;
979 int loopcount = 50; /* arbitrary max preventing infinite loop */
980
981 ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in);
982 if (ndpoffset < 0)
983 goto error;
984
985 next_ndp:
986 nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset);
987 if (nframes < 0)
988 goto error;
989
990 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
991
992 if (le32_to_cpu(ndp16->dwSignature) != USB_CDC_NCM_NDP16_NOCRC_SIGN) {
993 pr_debug("invalid DPT16 signature <%u>\n",
994 le32_to_cpu(ndp16->dwSignature));
995 goto err_ndp;
996 }
997 dpe16 = ndp16->dpe16;
998
999 for (x = 0; x < nframes; x++, dpe16++) {
1000 offset = le16_to_cpu(dpe16->wDatagramIndex);
1001 len = le16_to_cpu(dpe16->wDatagramLength);
1002
1003 /*
1004 * CDC NCM ch. 3.7
1005 * All entries after first NULL entry are to be ignored
1006 */
1007 if ((offset == 0) || (len == 0)) {
1008 if (!x)
1009 goto err_ndp; /* empty NTB */
1010 break;
1011 }
1012
1013 /* sanity checking */
1014 if (((offset + len) > skb_in->len) ||
1015 (len > ctx->rx_max) || (len < ETH_HLEN)) {
1016 pr_debug("invalid frame detected (ignored)"
1017 "offset[%u]=%u, length=%u, skb=%p\n",
1018 x, offset, len, skb_in);
1019 if (!x)
1020 goto err_ndp;
1021 break;
1022
1023 } else {
1024 skb = skb_clone(skb_in, GFP_ATOMIC);
1025 if (!skb)
1026 goto error;
1027 skb->len = len;
1028 skb->data = ((u8 *)skb_in->data) + offset;
1029 skb_set_tail_pointer(skb, len);
1030 usbnet_skb_return(dev, skb);
1031 }
1032 }
1033 err_ndp:
1034 /* are there more NDPs to process? */
1035 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
1036 if (ndpoffset && loopcount--)
1037 goto next_ndp;
1038
1039 return 1;
1040 error:
1041 return 0;
1042 }
1043
1044 static void
1045 cdc_ncm_speed_change(struct cdc_ncm_ctx *ctx,
1046 struct usb_cdc_speed_change *data)
1047 {
1048 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate);
1049 uint32_t tx_speed = le32_to_cpu(data->ULBitRate);
1050
1051 /*
1052 * Currently the USB-NET API does not support reporting the actual
1053 * device speed. Do print it instead.
1054 */
1055 if ((tx_speed != ctx->tx_speed) || (rx_speed != ctx->rx_speed)) {
1056 ctx->tx_speed = tx_speed;
1057 ctx->rx_speed = rx_speed;
1058
1059 if ((tx_speed > 1000000) && (rx_speed > 1000000)) {
1060 printk(KERN_INFO KBUILD_MODNAME
1061 ": %s: %u mbit/s downlink "
1062 "%u mbit/s uplink\n",
1063 ctx->netdev->name,
1064 (unsigned int)(rx_speed / 1000000U),
1065 (unsigned int)(tx_speed / 1000000U));
1066 } else {
1067 printk(KERN_INFO KBUILD_MODNAME
1068 ": %s: %u kbit/s downlink "
1069 "%u kbit/s uplink\n",
1070 ctx->netdev->name,
1071 (unsigned int)(rx_speed / 1000U),
1072 (unsigned int)(tx_speed / 1000U));
1073 }
1074 }
1075 }
1076
1077 static void cdc_ncm_status(struct usbnet *dev, struct urb *urb)
1078 {
1079 struct cdc_ncm_ctx *ctx;
1080 struct usb_cdc_notification *event;
1081
1082 ctx = (struct cdc_ncm_ctx *)dev->data[0];
1083
1084 if (urb->actual_length < sizeof(*event))
1085 return;
1086
1087 /* test for split data in 8-byte chunks */
1088 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
1089 cdc_ncm_speed_change(ctx,
1090 (struct usb_cdc_speed_change *)urb->transfer_buffer);
1091 return;
1092 }
1093
1094 event = urb->transfer_buffer;
1095
1096 switch (event->bNotificationType) {
1097 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
1098 /*
1099 * According to the CDC NCM specification ch.7.1
1100 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be
1101 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE.
1102 */
1103 ctx->connected = le16_to_cpu(event->wValue);
1104
1105 printk(KERN_INFO KBUILD_MODNAME ": %s: network connection:"
1106 " %sconnected\n",
1107 ctx->netdev->name, ctx->connected ? "" : "dis");
1108
1109 usbnet_link_change(dev, ctx->connected, 0);
1110 if (!ctx->connected)
1111 ctx->tx_speed = ctx->rx_speed = 0;
1112 break;
1113
1114 case USB_CDC_NOTIFY_SPEED_CHANGE:
1115 if (urb->actual_length < (sizeof(*event) +
1116 sizeof(struct usb_cdc_speed_change)))
1117 set_bit(EVENT_STS_SPLIT, &dev->flags);
1118 else
1119 cdc_ncm_speed_change(ctx,
1120 (struct usb_cdc_speed_change *) &event[1]);
1121 break;
1122
1123 default:
1124 dev_dbg(&dev->udev->dev,
1125 "NCM: unexpected notification 0x%02x!\n",
1126 event->bNotificationType);
1127 break;
1128 }
1129 }
1130
1131 static int cdc_ncm_check_connect(struct usbnet *dev)
1132 {
1133 struct cdc_ncm_ctx *ctx;
1134
1135 ctx = (struct cdc_ncm_ctx *)dev->data[0];
1136 if (ctx == NULL)
1137 return 1; /* disconnected */
1138
1139 return !ctx->connected;
1140 }
1141
1142 static int
1143 cdc_ncm_probe(struct usb_interface *udev, const struct usb_device_id *prod)
1144 {
1145 return usbnet_probe(udev, prod);
1146 }
1147
1148 static void cdc_ncm_disconnect(struct usb_interface *intf)
1149 {
1150 struct usbnet *dev = usb_get_intfdata(intf);
1151
1152 if (dev == NULL)
1153 return; /* already disconnected */
1154
1155 usbnet_disconnect(intf);
1156 }
1157
1158 static const struct driver_info cdc_ncm_info = {
1159 .description = "CDC NCM",
1160 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
1161 | FLAG_LINK_INTR,
1162 .bind = cdc_ncm_bind,
1163 .unbind = cdc_ncm_unbind,
1164 .check_connect = cdc_ncm_check_connect,
1165 .manage_power = usbnet_manage_power,
1166 .status = cdc_ncm_status,
1167 .rx_fixup = cdc_ncm_rx_fixup,
1168 .tx_fixup = cdc_ncm_tx_fixup,
1169 };
1170
1171 /* Same as cdc_ncm_info, but with FLAG_WWAN */
1172 static const struct driver_info wwan_info = {
1173 .description = "Mobile Broadband Network Device",
1174 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
1175 | FLAG_LINK_INTR | FLAG_WWAN,
1176 .bind = cdc_ncm_bind,
1177 .unbind = cdc_ncm_unbind,
1178 .check_connect = cdc_ncm_check_connect,
1179 .manage_power = usbnet_manage_power,
1180 .status = cdc_ncm_status,
1181 .rx_fixup = cdc_ncm_rx_fixup,
1182 .tx_fixup = cdc_ncm_tx_fixup,
1183 };
1184
1185 /* Same as wwan_info, but with FLAG_NOARP */
1186 static const struct driver_info wwan_noarp_info = {
1187 .description = "Mobile Broadband Network Device (NO ARP)",
1188 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
1189 | FLAG_LINK_INTR | FLAG_WWAN | FLAG_NOARP,
1190 .bind = cdc_ncm_bind,
1191 .unbind = cdc_ncm_unbind,
1192 .check_connect = cdc_ncm_check_connect,
1193 .manage_power = usbnet_manage_power,
1194 .status = cdc_ncm_status,
1195 .rx_fixup = cdc_ncm_rx_fixup,
1196 .tx_fixup = cdc_ncm_tx_fixup,
1197 };
1198
1199 static const struct usb_device_id cdc_devs[] = {
1200 /* Ericsson MBM devices like F5521gw */
1201 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1202 | USB_DEVICE_ID_MATCH_VENDOR,
1203 .idVendor = 0x0bdb,
1204 .bInterfaceClass = USB_CLASS_COMM,
1205 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1206 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1207 .driver_info = (unsigned long) &wwan_info,
1208 },
1209
1210 /* Dell branded MBM devices like DW5550 */
1211 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1212 | USB_DEVICE_ID_MATCH_VENDOR,
1213 .idVendor = 0x413c,
1214 .bInterfaceClass = USB_CLASS_COMM,
1215 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1216 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1217 .driver_info = (unsigned long) &wwan_info,
1218 },
1219
1220 /* Toshiba branded MBM devices */
1221 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1222 | USB_DEVICE_ID_MATCH_VENDOR,
1223 .idVendor = 0x0930,
1224 .bInterfaceClass = USB_CLASS_COMM,
1225 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1226 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1227 .driver_info = (unsigned long) &wwan_info,
1228 },
1229
1230 /* tag Huawei devices as wwan */
1231 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1,
1232 USB_CLASS_COMM,
1233 USB_CDC_SUBCLASS_NCM,
1234 USB_CDC_PROTO_NONE),
1235 .driver_info = (unsigned long)&wwan_info,
1236 },
1237
1238 /* Huawei NCM devices disguised as vendor specific */
1239 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x16),
1240 .driver_info = (unsigned long)&wwan_info,
1241 },
1242 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x46),
1243 .driver_info = (unsigned long)&wwan_info,
1244 },
1245 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x76),
1246 .driver_info = (unsigned long)&wwan_info,
1247 },
1248
1249 /* Infineon(now Intel) HSPA Modem platform */
1250 { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443,
1251 USB_CLASS_COMM,
1252 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1253 .driver_info = (unsigned long)&wwan_noarp_info,
1254 },
1255
1256 /* Generic CDC-NCM devices */
1257 { USB_INTERFACE_INFO(USB_CLASS_COMM,
1258 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1259 .driver_info = (unsigned long)&cdc_ncm_info,
1260 },
1261 {
1262 },
1263 };
1264 MODULE_DEVICE_TABLE(usb, cdc_devs);
1265
1266 static struct usb_driver cdc_ncm_driver = {
1267 .name = "cdc_ncm",
1268 .id_table = cdc_devs,
1269 .probe = cdc_ncm_probe,
1270 .disconnect = cdc_ncm_disconnect,
1271 .suspend = usbnet_suspend,
1272 .resume = usbnet_resume,
1273 .reset_resume = usbnet_resume,
1274 .supports_autosuspend = 1,
1275 .disable_hub_initiated_lpm = 1,
1276 };
1277
1278 module_usb_driver(cdc_ncm_driver);
1279
1280 MODULE_AUTHOR("Hans Petter Selasky");
1281 MODULE_DESCRIPTION("USB CDC NCM host driver");
1282 MODULE_LICENSE("Dual BSD/GPL");
kernel source for telekom puls (alcatel/mediatek)