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a84fab3c CL |
1 | /* |
2 | * Atheros CARL9170 driver | |
3 | * | |
4 | * USB - frontend | |
5 | * | |
6 | * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> | |
7 | * Copyright 2009, 2010, Christian Lamparter <chunkeey@googlemail.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; see the file COPYING. If not, see | |
21 | * http://www.gnu.org/licenses/. | |
22 | * | |
23 | * This file incorporates work covered by the following copyright and | |
24 | * permission notice: | |
25 | * Copyright (c) 2007-2008 Atheros Communications, Inc. | |
26 | * | |
27 | * Permission to use, copy, modify, and/or distribute this software for any | |
28 | * purpose with or without fee is hereby granted, provided that the above | |
29 | * copyright notice and this permission notice appear in all copies. | |
30 | * | |
31 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
32 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
33 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
34 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
35 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
36 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
37 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
38 | */ | |
39 | ||
40 | #include <linux/module.h> | |
41 | #include <linux/slab.h> | |
42 | #include <linux/usb.h> | |
43 | #include <linux/firmware.h> | |
44 | #include <linux/etherdevice.h> | |
45 | #include <linux/device.h> | |
46 | #include <net/mac80211.h> | |
47 | #include "carl9170.h" | |
48 | #include "cmd.h" | |
49 | #include "hw.h" | |
50 | #include "fwcmd.h" | |
51 | ||
52 | MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>"); | |
53 | MODULE_AUTHOR("Christian Lamparter <chunkeey@googlemail.com>"); | |
54 | MODULE_LICENSE("GPL"); | |
55 | MODULE_DESCRIPTION("Atheros AR9170 802.11n USB wireless"); | |
56 | MODULE_FIRMWARE(CARL9170FW_NAME); | |
57 | MODULE_ALIAS("ar9170usb"); | |
58 | MODULE_ALIAS("arusb_lnx"); | |
59 | ||
60 | /* | |
61 | * Note: | |
62 | * | |
63 | * Always update our wiki's device list (located at: | |
64 | * http://wireless.kernel.org/en/users/Drivers/ar9170/devices ), | |
65 | * whenever you add a new device. | |
66 | */ | |
67 | static struct usb_device_id carl9170_usb_ids[] = { | |
68 | /* Atheros 9170 */ | |
69 | { USB_DEVICE(0x0cf3, 0x9170) }, | |
70 | /* Atheros TG121N */ | |
71 | { USB_DEVICE(0x0cf3, 0x1001) }, | |
72 | /* TP-Link TL-WN821N v2 */ | |
73 | { USB_DEVICE(0x0cf3, 0x1002), .driver_info = CARL9170_WPS_BUTTON | | |
74 | CARL9170_ONE_LED }, | |
75 | /* 3Com Dual Band 802.11n USB Adapter */ | |
76 | { USB_DEVICE(0x0cf3, 0x1010) }, | |
77 | /* H3C Dual Band 802.11n USB Adapter */ | |
78 | { USB_DEVICE(0x0cf3, 0x1011) }, | |
79 | /* Cace Airpcap NX */ | |
80 | { USB_DEVICE(0xcace, 0x0300) }, | |
81 | /* D-Link DWA 160 A1 */ | |
82 | { USB_DEVICE(0x07d1, 0x3c10) }, | |
83 | /* D-Link DWA 160 A2 */ | |
84 | { USB_DEVICE(0x07d1, 0x3a09) }, | |
8df86db9 CL |
85 | /* D-Link DWA 130 D */ |
86 | { USB_DEVICE(0x07d1, 0x3a0f) }, | |
a84fab3c CL |
87 | /* Netgear WNA1000 */ |
88 | { USB_DEVICE(0x0846, 0x9040) }, | |
8df86db9 | 89 | /* Netgear WNDA3100 (v1) */ |
a84fab3c CL |
90 | { USB_DEVICE(0x0846, 0x9010) }, |
91 | /* Netgear WN111 v2 */ | |
92 | { USB_DEVICE(0x0846, 0x9001), .driver_info = CARL9170_ONE_LED }, | |
93 | /* Zydas ZD1221 */ | |
94 | { USB_DEVICE(0x0ace, 0x1221) }, | |
95 | /* Proxim ORiNOCO 802.11n USB */ | |
96 | { USB_DEVICE(0x1435, 0x0804) }, | |
97 | /* WNC Generic 11n USB Dongle */ | |
98 | { USB_DEVICE(0x1435, 0x0326) }, | |
99 | /* ZyXEL NWD271N */ | |
100 | { USB_DEVICE(0x0586, 0x3417) }, | |
101 | /* Z-Com UB81 BG */ | |
102 | { USB_DEVICE(0x0cde, 0x0023) }, | |
103 | /* Z-Com UB82 ABG */ | |
104 | { USB_DEVICE(0x0cde, 0x0026) }, | |
105 | /* Sphairon Homelink 1202 */ | |
106 | { USB_DEVICE(0x0cde, 0x0027) }, | |
107 | /* Arcadyan WN7512 */ | |
108 | { USB_DEVICE(0x083a, 0xf522) }, | |
109 | /* Planex GWUS300 */ | |
110 | { USB_DEVICE(0x2019, 0x5304) }, | |
111 | /* IO-Data WNGDNUS2 */ | |
112 | { USB_DEVICE(0x04bb, 0x093f) }, | |
113 | /* NEC WL300NU-G */ | |
114 | { USB_DEVICE(0x0409, 0x0249) }, | |
06a86ddb CL |
115 | /* NEC WL300NU-AG */ |
116 | { USB_DEVICE(0x0409, 0x02b4) }, | |
a84fab3c CL |
117 | /* AVM FRITZ!WLAN USB Stick N */ |
118 | { USB_DEVICE(0x057c, 0x8401) }, | |
119 | /* AVM FRITZ!WLAN USB Stick N 2.4 */ | |
120 | { USB_DEVICE(0x057c, 0x8402) }, | |
121 | /* Qwest/Actiontec 802AIN Wireless N USB Network Adapter */ | |
122 | { USB_DEVICE(0x1668, 0x1200) }, | |
c86664e5 JP |
123 | /* Airlive X.USB a/b/g/n */ |
124 | { USB_DEVICE(0x1b75, 0x9170) }, | |
a84fab3c CL |
125 | |
126 | /* terminate */ | |
127 | {} | |
128 | }; | |
129 | MODULE_DEVICE_TABLE(usb, carl9170_usb_ids); | |
130 | ||
131 | static void carl9170_usb_submit_data_urb(struct ar9170 *ar) | |
132 | { | |
133 | struct urb *urb; | |
134 | int err; | |
135 | ||
136 | if (atomic_inc_return(&ar->tx_anch_urbs) > AR9170_NUM_TX_URBS) | |
137 | goto err_acc; | |
138 | ||
139 | urb = usb_get_from_anchor(&ar->tx_wait); | |
140 | if (!urb) | |
141 | goto err_acc; | |
142 | ||
143 | usb_anchor_urb(urb, &ar->tx_anch); | |
144 | ||
145 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
146 | if (unlikely(err)) { | |
147 | if (net_ratelimit()) { | |
148 | dev_err(&ar->udev->dev, "tx submit failed (%d)\n", | |
149 | urb->status); | |
150 | } | |
151 | ||
152 | usb_unanchor_urb(urb); | |
153 | usb_anchor_urb(urb, &ar->tx_err); | |
154 | } | |
155 | ||
156 | usb_free_urb(urb); | |
157 | ||
158 | if (likely(err == 0)) | |
159 | return; | |
160 | ||
161 | err_acc: | |
162 | atomic_dec(&ar->tx_anch_urbs); | |
163 | } | |
164 | ||
165 | static void carl9170_usb_tx_data_complete(struct urb *urb) | |
166 | { | |
b2767363 | 167 | struct ar9170 *ar = usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); |
a84fab3c CL |
168 | |
169 | if (WARN_ON_ONCE(!ar)) { | |
170 | dev_kfree_skb_irq(urb->context); | |
171 | return; | |
172 | } | |
173 | ||
174 | atomic_dec(&ar->tx_anch_urbs); | |
175 | ||
176 | switch (urb->status) { | |
177 | /* everything is fine */ | |
178 | case 0: | |
179 | carl9170_tx_callback(ar, (void *)urb->context); | |
180 | break; | |
181 | ||
182 | /* disconnect */ | |
183 | case -ENOENT: | |
184 | case -ECONNRESET: | |
185 | case -ENODEV: | |
186 | case -ESHUTDOWN: | |
187 | /* | |
188 | * Defer the frame clean-up to the tasklet worker. | |
189 | * This is necessary, because carl9170_tx_drop | |
190 | * does not work in an irqsave context. | |
191 | */ | |
192 | usb_anchor_urb(urb, &ar->tx_err); | |
193 | return; | |
194 | ||
195 | /* a random transmission error has occurred? */ | |
196 | default: | |
197 | if (net_ratelimit()) { | |
198 | dev_err(&ar->udev->dev, "tx failed (%d)\n", | |
199 | urb->status); | |
200 | } | |
201 | ||
202 | usb_anchor_urb(urb, &ar->tx_err); | |
203 | break; | |
204 | } | |
205 | ||
206 | if (likely(IS_STARTED(ar))) | |
207 | carl9170_usb_submit_data_urb(ar); | |
208 | } | |
209 | ||
210 | static int carl9170_usb_submit_cmd_urb(struct ar9170 *ar) | |
211 | { | |
212 | struct urb *urb; | |
213 | int err; | |
214 | ||
215 | if (atomic_inc_return(&ar->tx_cmd_urbs) != 1) { | |
216 | atomic_dec(&ar->tx_cmd_urbs); | |
217 | return 0; | |
218 | } | |
219 | ||
220 | urb = usb_get_from_anchor(&ar->tx_cmd); | |
221 | if (!urb) { | |
222 | atomic_dec(&ar->tx_cmd_urbs); | |
223 | return 0; | |
224 | } | |
225 | ||
226 | usb_anchor_urb(urb, &ar->tx_anch); | |
227 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
228 | if (unlikely(err)) { | |
229 | usb_unanchor_urb(urb); | |
230 | atomic_dec(&ar->tx_cmd_urbs); | |
231 | } | |
232 | usb_free_urb(urb); | |
233 | ||
234 | return err; | |
235 | } | |
236 | ||
237 | static void carl9170_usb_cmd_complete(struct urb *urb) | |
238 | { | |
239 | struct ar9170 *ar = urb->context; | |
240 | int err = 0; | |
241 | ||
242 | if (WARN_ON_ONCE(!ar)) | |
243 | return; | |
244 | ||
245 | atomic_dec(&ar->tx_cmd_urbs); | |
246 | ||
247 | switch (urb->status) { | |
248 | /* everything is fine */ | |
249 | case 0: | |
250 | break; | |
251 | ||
252 | /* disconnect */ | |
253 | case -ENOENT: | |
254 | case -ECONNRESET: | |
255 | case -ENODEV: | |
256 | case -ESHUTDOWN: | |
257 | return; | |
258 | ||
259 | default: | |
260 | err = urb->status; | |
261 | break; | |
262 | } | |
263 | ||
264 | if (!IS_INITIALIZED(ar)) | |
265 | return; | |
266 | ||
267 | if (err) | |
268 | dev_err(&ar->udev->dev, "submit cmd cb failed (%d).\n", err); | |
269 | ||
270 | err = carl9170_usb_submit_cmd_urb(ar); | |
271 | if (err) | |
272 | dev_err(&ar->udev->dev, "submit cmd failed (%d).\n", err); | |
273 | } | |
274 | ||
275 | static void carl9170_usb_rx_irq_complete(struct urb *urb) | |
276 | { | |
277 | struct ar9170 *ar = urb->context; | |
278 | ||
279 | if (WARN_ON_ONCE(!ar)) | |
280 | return; | |
281 | ||
282 | switch (urb->status) { | |
283 | /* everything is fine */ | |
284 | case 0: | |
285 | break; | |
286 | ||
287 | /* disconnect */ | |
288 | case -ENOENT: | |
289 | case -ECONNRESET: | |
290 | case -ENODEV: | |
291 | case -ESHUTDOWN: | |
292 | return; | |
293 | ||
294 | default: | |
295 | goto resubmit; | |
296 | } | |
297 | ||
b4764c80 CL |
298 | /* |
299 | * While the carl9170 firmware does not use this EP, the | |
300 | * firmware loader in the EEPROM unfortunately does. | |
301 | * Therefore we need to be ready to handle out-of-band | |
302 | * responses and traps in case the firmware crashed and | |
303 | * the loader took over again. | |
304 | */ | |
a84fab3c CL |
305 | carl9170_handle_command_response(ar, urb->transfer_buffer, |
306 | urb->actual_length); | |
307 | ||
308 | resubmit: | |
309 | usb_anchor_urb(urb, &ar->rx_anch); | |
310 | if (unlikely(usb_submit_urb(urb, GFP_ATOMIC))) | |
311 | usb_unanchor_urb(urb); | |
312 | } | |
313 | ||
314 | static int carl9170_usb_submit_rx_urb(struct ar9170 *ar, gfp_t gfp) | |
315 | { | |
316 | struct urb *urb; | |
317 | int err = 0, runs = 0; | |
318 | ||
319 | while ((atomic_read(&ar->rx_anch_urbs) < AR9170_NUM_RX_URBS) && | |
320 | (runs++ < AR9170_NUM_RX_URBS)) { | |
321 | err = -ENOSPC; | |
322 | urb = usb_get_from_anchor(&ar->rx_pool); | |
323 | if (urb) { | |
324 | usb_anchor_urb(urb, &ar->rx_anch); | |
325 | err = usb_submit_urb(urb, gfp); | |
326 | if (unlikely(err)) { | |
327 | usb_unanchor_urb(urb); | |
328 | usb_anchor_urb(urb, &ar->rx_pool); | |
329 | } else { | |
330 | atomic_dec(&ar->rx_pool_urbs); | |
331 | atomic_inc(&ar->rx_anch_urbs); | |
332 | } | |
333 | usb_free_urb(urb); | |
334 | } | |
335 | } | |
336 | ||
337 | return err; | |
338 | } | |
339 | ||
340 | static void carl9170_usb_rx_work(struct ar9170 *ar) | |
341 | { | |
342 | struct urb *urb; | |
343 | int i; | |
344 | ||
345 | for (i = 0; i < AR9170_NUM_RX_URBS_POOL; i++) { | |
346 | urb = usb_get_from_anchor(&ar->rx_work); | |
347 | if (!urb) | |
348 | break; | |
349 | ||
350 | atomic_dec(&ar->rx_work_urbs); | |
351 | if (IS_INITIALIZED(ar)) { | |
352 | carl9170_rx(ar, urb->transfer_buffer, | |
353 | urb->actual_length); | |
354 | } | |
355 | ||
356 | usb_anchor_urb(urb, &ar->rx_pool); | |
357 | atomic_inc(&ar->rx_pool_urbs); | |
358 | ||
359 | usb_free_urb(urb); | |
360 | ||
361 | carl9170_usb_submit_rx_urb(ar, GFP_ATOMIC); | |
362 | } | |
363 | } | |
364 | ||
365 | void carl9170_usb_handle_tx_err(struct ar9170 *ar) | |
366 | { | |
367 | struct urb *urb; | |
368 | ||
369 | while ((urb = usb_get_from_anchor(&ar->tx_err))) { | |
370 | struct sk_buff *skb = (void *)urb->context; | |
371 | ||
372 | carl9170_tx_drop(ar, skb); | |
373 | carl9170_tx_callback(ar, skb); | |
374 | usb_free_urb(urb); | |
375 | } | |
376 | } | |
377 | ||
378 | static void carl9170_usb_tasklet(unsigned long data) | |
379 | { | |
380 | struct ar9170 *ar = (struct ar9170 *) data; | |
381 | ||
cf6487d0 CL |
382 | if (!IS_INITIALIZED(ar)) |
383 | return; | |
384 | ||
a84fab3c CL |
385 | carl9170_usb_rx_work(ar); |
386 | ||
387 | /* | |
388 | * Strictly speaking: The tx scheduler is not part of the USB system. | |
389 | * But the rx worker returns frames back to the mac80211-stack and | |
390 | * this is the _perfect_ place to generate the next transmissions. | |
391 | */ | |
392 | if (IS_STARTED(ar)) | |
393 | carl9170_tx_scheduler(ar); | |
394 | } | |
395 | ||
396 | static void carl9170_usb_rx_complete(struct urb *urb) | |
397 | { | |
398 | struct ar9170 *ar = (struct ar9170 *)urb->context; | |
399 | int err; | |
400 | ||
401 | if (WARN_ON_ONCE(!ar)) | |
402 | return; | |
403 | ||
404 | atomic_dec(&ar->rx_anch_urbs); | |
405 | ||
406 | switch (urb->status) { | |
407 | case 0: | |
408 | /* rx path */ | |
409 | usb_anchor_urb(urb, &ar->rx_work); | |
410 | atomic_inc(&ar->rx_work_urbs); | |
411 | break; | |
412 | ||
413 | case -ENOENT: | |
414 | case -ECONNRESET: | |
415 | case -ENODEV: | |
416 | case -ESHUTDOWN: | |
417 | /* handle disconnect events*/ | |
418 | return; | |
419 | ||
420 | default: | |
421 | /* handle all other errors */ | |
422 | usb_anchor_urb(urb, &ar->rx_pool); | |
423 | atomic_inc(&ar->rx_pool_urbs); | |
424 | break; | |
425 | } | |
426 | ||
427 | err = carl9170_usb_submit_rx_urb(ar, GFP_ATOMIC); | |
428 | if (unlikely(err)) { | |
429 | /* | |
430 | * usb_submit_rx_urb reported a problem. | |
431 | * In case this is due to a rx buffer shortage, | |
432 | * elevate the tasklet worker priority to | |
433 | * the highest available level. | |
434 | */ | |
435 | tasklet_hi_schedule(&ar->usb_tasklet); | |
436 | ||
437 | if (atomic_read(&ar->rx_anch_urbs) == 0) { | |
438 | /* | |
439 | * The system is too slow to cope with | |
440 | * the enormous workload. We have simply | |
441 | * run out of active rx urbs and this | |
25985edc | 442 | * unfortunately leads to an unpredictable |
a84fab3c CL |
443 | * device. |
444 | */ | |
445 | ||
e4a668c5 | 446 | ieee80211_queue_work(ar->hw, &ar->ping_work); |
a84fab3c CL |
447 | } |
448 | } else { | |
449 | /* | |
450 | * Using anything less than _high_ priority absolutely | |
451 | * kills the rx performance my UP-System... | |
452 | */ | |
453 | tasklet_hi_schedule(&ar->usb_tasklet); | |
454 | } | |
455 | } | |
456 | ||
457 | static struct urb *carl9170_usb_alloc_rx_urb(struct ar9170 *ar, gfp_t gfp) | |
458 | { | |
459 | struct urb *urb; | |
460 | void *buf; | |
461 | ||
462 | buf = kmalloc(ar->fw.rx_size, gfp); | |
463 | if (!buf) | |
464 | return NULL; | |
465 | ||
466 | urb = usb_alloc_urb(0, gfp); | |
467 | if (!urb) { | |
468 | kfree(buf); | |
469 | return NULL; | |
470 | } | |
471 | ||
472 | usb_fill_bulk_urb(urb, ar->udev, usb_rcvbulkpipe(ar->udev, | |
473 | AR9170_USB_EP_RX), buf, ar->fw.rx_size, | |
474 | carl9170_usb_rx_complete, ar); | |
475 | ||
476 | urb->transfer_flags |= URB_FREE_BUFFER; | |
477 | ||
478 | return urb; | |
479 | } | |
480 | ||
481 | static int carl9170_usb_send_rx_irq_urb(struct ar9170 *ar) | |
482 | { | |
483 | struct urb *urb = NULL; | |
484 | void *ibuf; | |
485 | int err = -ENOMEM; | |
486 | ||
487 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
488 | if (!urb) | |
489 | goto out; | |
490 | ||
491 | ibuf = kmalloc(AR9170_USB_EP_CTRL_MAX, GFP_KERNEL); | |
492 | if (!ibuf) | |
493 | goto out; | |
494 | ||
495 | usb_fill_int_urb(urb, ar->udev, usb_rcvintpipe(ar->udev, | |
496 | AR9170_USB_EP_IRQ), ibuf, AR9170_USB_EP_CTRL_MAX, | |
497 | carl9170_usb_rx_irq_complete, ar, 1); | |
498 | ||
499 | urb->transfer_flags |= URB_FREE_BUFFER; | |
500 | ||
501 | usb_anchor_urb(urb, &ar->rx_anch); | |
502 | err = usb_submit_urb(urb, GFP_KERNEL); | |
503 | if (err) | |
504 | usb_unanchor_urb(urb); | |
505 | ||
506 | out: | |
507 | usb_free_urb(urb); | |
508 | return err; | |
509 | } | |
510 | ||
511 | static int carl9170_usb_init_rx_bulk_urbs(struct ar9170 *ar) | |
512 | { | |
513 | struct urb *urb; | |
514 | int i, err = -EINVAL; | |
515 | ||
516 | /* | |
517 | * The driver actively maintains a second shadow | |
518 | * pool for inactive, but fully-prepared rx urbs. | |
519 | * | |
520 | * The pool should help the driver to master huge | |
521 | * workload spikes without running the risk of | |
522 | * undersupplying the hardware or wasting time by | |
523 | * processing rx data (streams) inside the urb | |
524 | * completion (hardirq context). | |
525 | */ | |
526 | for (i = 0; i < AR9170_NUM_RX_URBS_POOL; i++) { | |
527 | urb = carl9170_usb_alloc_rx_urb(ar, GFP_KERNEL); | |
528 | if (!urb) { | |
529 | err = -ENOMEM; | |
530 | goto err_out; | |
531 | } | |
532 | ||
533 | usb_anchor_urb(urb, &ar->rx_pool); | |
534 | atomic_inc(&ar->rx_pool_urbs); | |
535 | usb_free_urb(urb); | |
536 | } | |
537 | ||
538 | err = carl9170_usb_submit_rx_urb(ar, GFP_KERNEL); | |
539 | if (err) | |
540 | goto err_out; | |
541 | ||
542 | /* the device now waiting for the firmware. */ | |
543 | carl9170_set_state_when(ar, CARL9170_STOPPED, CARL9170_IDLE); | |
544 | return 0; | |
545 | ||
546 | err_out: | |
547 | ||
548 | usb_scuttle_anchored_urbs(&ar->rx_pool); | |
549 | usb_scuttle_anchored_urbs(&ar->rx_work); | |
550 | usb_kill_anchored_urbs(&ar->rx_anch); | |
551 | return err; | |
552 | } | |
553 | ||
554 | static int carl9170_usb_flush(struct ar9170 *ar) | |
555 | { | |
556 | struct urb *urb; | |
557 | int ret, err = 0; | |
558 | ||
559 | while ((urb = usb_get_from_anchor(&ar->tx_wait))) { | |
560 | struct sk_buff *skb = (void *)urb->context; | |
561 | carl9170_tx_drop(ar, skb); | |
562 | carl9170_tx_callback(ar, skb); | |
563 | usb_free_urb(urb); | |
564 | } | |
565 | ||
dfa31fef | 566 | ret = usb_wait_anchor_empty_timeout(&ar->tx_cmd, 1000); |
a84fab3c CL |
567 | if (ret == 0) |
568 | err = -ETIMEDOUT; | |
569 | ||
570 | /* lets wait a while until the tx - queues are dried out */ | |
dfa31fef | 571 | ret = usb_wait_anchor_empty_timeout(&ar->tx_anch, 1000); |
a84fab3c CL |
572 | if (ret == 0) |
573 | err = -ETIMEDOUT; | |
574 | ||
575 | usb_kill_anchored_urbs(&ar->tx_anch); | |
576 | carl9170_usb_handle_tx_err(ar); | |
577 | ||
578 | return err; | |
579 | } | |
580 | ||
581 | static void carl9170_usb_cancel_urbs(struct ar9170 *ar) | |
582 | { | |
583 | int err; | |
584 | ||
585 | carl9170_set_state(ar, CARL9170_UNKNOWN_STATE); | |
586 | ||
587 | err = carl9170_usb_flush(ar); | |
588 | if (err) | |
589 | dev_err(&ar->udev->dev, "stuck tx urbs!\n"); | |
590 | ||
591 | usb_poison_anchored_urbs(&ar->tx_anch); | |
592 | carl9170_usb_handle_tx_err(ar); | |
593 | usb_poison_anchored_urbs(&ar->rx_anch); | |
594 | ||
595 | tasklet_kill(&ar->usb_tasklet); | |
596 | ||
597 | usb_scuttle_anchored_urbs(&ar->rx_work); | |
598 | usb_scuttle_anchored_urbs(&ar->rx_pool); | |
599 | usb_scuttle_anchored_urbs(&ar->tx_cmd); | |
600 | } | |
601 | ||
602 | int __carl9170_exec_cmd(struct ar9170 *ar, struct carl9170_cmd *cmd, | |
603 | const bool free_buf) | |
604 | { | |
605 | struct urb *urb; | |
cae7f953 | 606 | int err = 0; |
a84fab3c | 607 | |
cae7f953 CL |
608 | if (!IS_INITIALIZED(ar)) { |
609 | err = -EPERM; | |
610 | goto err_free; | |
611 | } | |
a84fab3c | 612 | |
cae7f953 CL |
613 | if (WARN_ON(cmd->hdr.len > CARL9170_MAX_CMD_LEN - 4)) { |
614 | err = -EINVAL; | |
615 | goto err_free; | |
616 | } | |
a84fab3c CL |
617 | |
618 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
cae7f953 CL |
619 | if (!urb) { |
620 | err = -ENOMEM; | |
621 | goto err_free; | |
622 | } | |
a84fab3c | 623 | |
671796dd RW |
624 | if (ar->usb_ep_cmd_is_bulk) |
625 | usb_fill_bulk_urb(urb, ar->udev, | |
626 | usb_sndbulkpipe(ar->udev, AR9170_USB_EP_CMD), | |
627 | cmd, cmd->hdr.len + 4, | |
628 | carl9170_usb_cmd_complete, ar); | |
629 | else | |
630 | usb_fill_int_urb(urb, ar->udev, | |
631 | usb_sndintpipe(ar->udev, AR9170_USB_EP_CMD), | |
632 | cmd, cmd->hdr.len + 4, | |
633 | carl9170_usb_cmd_complete, ar, 1); | |
a84fab3c | 634 | |
a84fab3c CL |
635 | if (free_buf) |
636 | urb->transfer_flags |= URB_FREE_BUFFER; | |
637 | ||
638 | usb_anchor_urb(urb, &ar->tx_cmd); | |
639 | usb_free_urb(urb); | |
640 | ||
641 | return carl9170_usb_submit_cmd_urb(ar); | |
cae7f953 CL |
642 | |
643 | err_free: | |
644 | if (free_buf) | |
645 | kfree(cmd); | |
646 | ||
647 | return err; | |
a84fab3c CL |
648 | } |
649 | ||
650 | int carl9170_exec_cmd(struct ar9170 *ar, const enum carl9170_cmd_oids cmd, | |
651 | unsigned int plen, void *payload, unsigned int outlen, void *out) | |
652 | { | |
653 | int err = -ENOMEM; | |
4b3e845a | 654 | unsigned long time_left; |
a84fab3c CL |
655 | |
656 | if (!IS_ACCEPTING_CMD(ar)) | |
657 | return -EIO; | |
658 | ||
659 | if (!(cmd & CARL9170_CMD_ASYNC_FLAG)) | |
660 | might_sleep(); | |
661 | ||
662 | ar->cmd.hdr.len = plen; | |
663 | ar->cmd.hdr.cmd = cmd; | |
664 | /* writing multiple regs fills this buffer already */ | |
665 | if (plen && payload != (u8 *)(ar->cmd.data)) | |
666 | memcpy(ar->cmd.data, payload, plen); | |
667 | ||
668 | spin_lock_bh(&ar->cmd_lock); | |
669 | ar->readbuf = (u8 *)out; | |
670 | ar->readlen = outlen; | |
671 | spin_unlock_bh(&ar->cmd_lock); | |
672 | ||
78a9e170 | 673 | reinit_completion(&ar->cmd_wait); |
a84fab3c CL |
674 | err = __carl9170_exec_cmd(ar, &ar->cmd, false); |
675 | ||
676 | if (!(cmd & CARL9170_CMD_ASYNC_FLAG)) { | |
4b3e845a NMG |
677 | time_left = wait_for_completion_timeout(&ar->cmd_wait, HZ); |
678 | if (time_left == 0) { | |
a84fab3c CL |
679 | err = -ETIMEDOUT; |
680 | goto err_unbuf; | |
681 | } | |
682 | ||
683 | if (ar->readlen != outlen) { | |
684 | err = -EMSGSIZE; | |
685 | goto err_unbuf; | |
686 | } | |
687 | } | |
688 | ||
689 | return 0; | |
690 | ||
691 | err_unbuf: | |
692 | /* Maybe the device was removed in the moment we were waiting? */ | |
693 | if (IS_STARTED(ar)) { | |
694 | dev_err(&ar->udev->dev, "no command feedback " | |
695 | "received (%d).\n", err); | |
696 | ||
697 | /* provide some maybe useful debug information */ | |
698 | print_hex_dump_bytes("carl9170 cmd: ", DUMP_PREFIX_NONE, | |
699 | &ar->cmd, plen + 4); | |
700 | ||
701 | carl9170_restart(ar, CARL9170_RR_COMMAND_TIMEOUT); | |
702 | } | |
703 | ||
704 | /* invalidate to avoid completing the next command prematurely */ | |
705 | spin_lock_bh(&ar->cmd_lock); | |
706 | ar->readbuf = NULL; | |
707 | ar->readlen = 0; | |
708 | spin_unlock_bh(&ar->cmd_lock); | |
709 | ||
710 | return err; | |
711 | } | |
712 | ||
713 | void carl9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb) | |
714 | { | |
715 | struct urb *urb; | |
716 | struct ar9170_stream *tx_stream; | |
717 | void *data; | |
718 | unsigned int len; | |
719 | ||
720 | if (!IS_STARTED(ar)) | |
721 | goto err_drop; | |
722 | ||
723 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
724 | if (!urb) | |
725 | goto err_drop; | |
726 | ||
727 | if (ar->fw.tx_stream) { | |
728 | tx_stream = (void *) (skb->data - sizeof(*tx_stream)); | |
729 | ||
730 | len = skb->len + sizeof(*tx_stream); | |
731 | tx_stream->length = cpu_to_le16(len); | |
732 | tx_stream->tag = cpu_to_le16(AR9170_TX_STREAM_TAG); | |
733 | data = tx_stream; | |
734 | } else { | |
735 | data = skb->data; | |
736 | len = skb->len; | |
737 | } | |
738 | ||
739 | usb_fill_bulk_urb(urb, ar->udev, usb_sndbulkpipe(ar->udev, | |
740 | AR9170_USB_EP_TX), data, len, | |
741 | carl9170_usb_tx_data_complete, skb); | |
742 | ||
743 | urb->transfer_flags |= URB_ZERO_PACKET; | |
744 | ||
745 | usb_anchor_urb(urb, &ar->tx_wait); | |
746 | ||
747 | usb_free_urb(urb); | |
748 | ||
749 | carl9170_usb_submit_data_urb(ar); | |
750 | return; | |
751 | ||
752 | err_drop: | |
753 | carl9170_tx_drop(ar, skb); | |
754 | carl9170_tx_callback(ar, skb); | |
755 | } | |
756 | ||
757 | static void carl9170_release_firmware(struct ar9170 *ar) | |
758 | { | |
759 | if (ar->fw.fw) { | |
760 | release_firmware(ar->fw.fw); | |
761 | memset(&ar->fw, 0, sizeof(ar->fw)); | |
762 | } | |
763 | } | |
764 | ||
765 | void carl9170_usb_stop(struct ar9170 *ar) | |
766 | { | |
767 | int ret; | |
768 | ||
769 | carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STOPPED); | |
770 | ||
771 | ret = carl9170_usb_flush(ar); | |
772 | if (ret) | |
773 | dev_err(&ar->udev->dev, "kill pending tx urbs.\n"); | |
774 | ||
775 | usb_poison_anchored_urbs(&ar->tx_anch); | |
776 | carl9170_usb_handle_tx_err(ar); | |
777 | ||
778 | /* kill any pending command */ | |
779 | spin_lock_bh(&ar->cmd_lock); | |
780 | ar->readlen = 0; | |
781 | spin_unlock_bh(&ar->cmd_lock); | |
78a9e170 | 782 | complete(&ar->cmd_wait); |
a84fab3c CL |
783 | |
784 | /* | |
785 | * Note: | |
786 | * So far we freed all tx urbs, but we won't dare to touch any rx urbs. | |
787 | * Else we would end up with a unresponsive device... | |
788 | */ | |
789 | } | |
790 | ||
791 | int carl9170_usb_open(struct ar9170 *ar) | |
792 | { | |
793 | usb_unpoison_anchored_urbs(&ar->tx_anch); | |
794 | ||
795 | carl9170_set_state_when(ar, CARL9170_STOPPED, CARL9170_IDLE); | |
796 | return 0; | |
797 | } | |
798 | ||
799 | static int carl9170_usb_load_firmware(struct ar9170 *ar) | |
800 | { | |
801 | const u8 *data; | |
802 | u8 *buf; | |
803 | unsigned int transfer; | |
804 | size_t len; | |
805 | u32 addr; | |
806 | int err = 0; | |
807 | ||
808 | buf = kmalloc(4096, GFP_KERNEL); | |
809 | if (!buf) { | |
810 | err = -ENOMEM; | |
811 | goto err_out; | |
812 | } | |
813 | ||
814 | data = ar->fw.fw->data; | |
815 | len = ar->fw.fw->size; | |
816 | addr = ar->fw.address; | |
817 | ||
818 | /* this removes the miniboot image */ | |
819 | data += ar->fw.offset; | |
820 | len -= ar->fw.offset; | |
821 | ||
822 | while (len) { | |
823 | transfer = min_t(unsigned int, len, 4096u); | |
824 | memcpy(buf, data, transfer); | |
825 | ||
826 | err = usb_control_msg(ar->udev, usb_sndctrlpipe(ar->udev, 0), | |
827 | 0x30 /* FW DL */, 0x40 | USB_DIR_OUT, | |
828 | addr >> 8, 0, buf, transfer, 100); | |
829 | ||
830 | if (err < 0) { | |
831 | kfree(buf); | |
832 | goto err_out; | |
833 | } | |
834 | ||
835 | len -= transfer; | |
836 | data += transfer; | |
837 | addr += transfer; | |
838 | } | |
839 | kfree(buf); | |
840 | ||
841 | err = usb_control_msg(ar->udev, usb_sndctrlpipe(ar->udev, 0), | |
842 | 0x31 /* FW DL COMPLETE */, | |
843 | 0x40 | USB_DIR_OUT, 0, 0, NULL, 0, 200); | |
844 | ||
845 | if (wait_for_completion_timeout(&ar->fw_boot_wait, HZ) == 0) { | |
846 | err = -ETIMEDOUT; | |
847 | goto err_out; | |
848 | } | |
849 | ||
850 | err = carl9170_echo_test(ar, 0x4a110123); | |
851 | if (err) | |
852 | goto err_out; | |
853 | ||
97e2c402 | 854 | /* now, start the command response counter */ |
a84fab3c CL |
855 | ar->cmd_seq = -1; |
856 | ||
857 | return 0; | |
858 | ||
859 | err_out: | |
860 | dev_err(&ar->udev->dev, "firmware upload failed (%d).\n", err); | |
861 | return err; | |
862 | } | |
863 | ||
864 | int carl9170_usb_restart(struct ar9170 *ar) | |
865 | { | |
866 | int err = 0; | |
867 | ||
868 | if (ar->intf->condition != USB_INTERFACE_BOUND) | |
869 | return 0; | |
870 | ||
97e2c402 CL |
871 | /* |
872 | * Disable the command response sequence counter check. | |
873 | * We already know that the device/firmware is in a bad state. | |
874 | * So, no extra points are awarded to anyone who reminds the | |
875 | * driver about that. | |
876 | */ | |
a84fab3c CL |
877 | ar->cmd_seq = -2; |
878 | ||
879 | err = carl9170_reboot(ar); | |
880 | ||
881 | carl9170_usb_stop(ar); | |
882 | ||
a84fab3c CL |
883 | if (err) |
884 | goto err_out; | |
885 | ||
886 | tasklet_schedule(&ar->usb_tasklet); | |
887 | ||
888 | /* The reboot procedure can take quite a while to complete. */ | |
889 | msleep(1100); | |
890 | ||
891 | err = carl9170_usb_open(ar); | |
892 | if (err) | |
893 | goto err_out; | |
894 | ||
895 | err = carl9170_usb_load_firmware(ar); | |
896 | if (err) | |
897 | goto err_out; | |
898 | ||
899 | return 0; | |
900 | ||
901 | err_out: | |
902 | carl9170_usb_cancel_urbs(ar); | |
903 | return err; | |
904 | } | |
905 | ||
906 | void carl9170_usb_reset(struct ar9170 *ar) | |
907 | { | |
908 | /* | |
909 | * This is the last resort to get the device going again | |
910 | * without any *user replugging action*. | |
911 | * | |
912 | * But there is a catch: usb_reset really is like a physical | |
913 | * *reconnect*. The mac80211 state will be lost in the process. | |
914 | * Therefore a userspace application, which is monitoring | |
915 | * the link must step in. | |
916 | */ | |
917 | carl9170_usb_cancel_urbs(ar); | |
918 | ||
919 | carl9170_usb_stop(ar); | |
920 | ||
921 | usb_queue_reset_device(ar->intf); | |
922 | } | |
923 | ||
924 | static int carl9170_usb_init_device(struct ar9170 *ar) | |
925 | { | |
926 | int err; | |
927 | ||
97e2c402 CL |
928 | /* |
929 | * The carl9170 firmware let's the driver know when it's | |
930 | * ready for action. But we have to be prepared to gracefully | |
931 | * handle all spurious [flushed] messages after each (re-)boot. | |
932 | * Thus the command response counter remains disabled until it | |
933 | * can be safely synchronized. | |
934 | */ | |
935 | ar->cmd_seq = -2; | |
936 | ||
a84fab3c CL |
937 | err = carl9170_usb_send_rx_irq_urb(ar); |
938 | if (err) | |
939 | goto err_out; | |
940 | ||
941 | err = carl9170_usb_init_rx_bulk_urbs(ar); | |
942 | if (err) | |
943 | goto err_unrx; | |
944 | ||
97e2c402 CL |
945 | err = carl9170_usb_open(ar); |
946 | if (err) | |
947 | goto err_unrx; | |
948 | ||
a84fab3c CL |
949 | mutex_lock(&ar->mutex); |
950 | err = carl9170_usb_load_firmware(ar); | |
951 | mutex_unlock(&ar->mutex); | |
952 | if (err) | |
97e2c402 | 953 | goto err_stop; |
a84fab3c CL |
954 | |
955 | return 0; | |
956 | ||
97e2c402 CL |
957 | err_stop: |
958 | carl9170_usb_stop(ar); | |
959 | ||
a84fab3c CL |
960 | err_unrx: |
961 | carl9170_usb_cancel_urbs(ar); | |
962 | ||
963 | err_out: | |
964 | return err; | |
965 | } | |
966 | ||
967 | static void carl9170_usb_firmware_failed(struct ar9170 *ar) | |
968 | { | |
969 | struct device *parent = ar->udev->dev.parent; | |
970 | struct usb_device *udev; | |
971 | ||
972 | /* | |
973 | * Store a copy of the usb_device pointer locally. | |
974 | * This is because device_release_driver initiates | |
975 | * carl9170_usb_disconnect, which in turn frees our | |
976 | * driver context (ar). | |
977 | */ | |
978 | udev = ar->udev; | |
979 | ||
980 | complete(&ar->fw_load_wait); | |
981 | ||
982 | /* unbind anything failed */ | |
983 | if (parent) | |
984 | device_lock(parent); | |
985 | ||
986 | device_release_driver(&udev->dev); | |
987 | if (parent) | |
988 | device_unlock(parent); | |
989 | ||
990 | usb_put_dev(udev); | |
991 | } | |
992 | ||
993 | static void carl9170_usb_firmware_finish(struct ar9170 *ar) | |
994 | { | |
995 | int err; | |
996 | ||
997 | err = carl9170_parse_firmware(ar); | |
998 | if (err) | |
999 | goto err_freefw; | |
1000 | ||
1001 | err = carl9170_usb_init_device(ar); | |
1002 | if (err) | |
1003 | goto err_freefw; | |
1004 | ||
a84fab3c CL |
1005 | err = carl9170_register(ar); |
1006 | ||
1007 | carl9170_usb_stop(ar); | |
1008 | if (err) | |
1009 | goto err_unrx; | |
1010 | ||
1011 | complete(&ar->fw_load_wait); | |
1012 | usb_put_dev(ar->udev); | |
1013 | return; | |
1014 | ||
1015 | err_unrx: | |
1016 | carl9170_usb_cancel_urbs(ar); | |
1017 | ||
1018 | err_freefw: | |
1019 | carl9170_release_firmware(ar); | |
1020 | carl9170_usb_firmware_failed(ar); | |
1021 | } | |
1022 | ||
1023 | static void carl9170_usb_firmware_step2(const struct firmware *fw, | |
1024 | void *context) | |
1025 | { | |
1026 | struct ar9170 *ar = context; | |
1027 | ||
1028 | if (fw) { | |
1029 | ar->fw.fw = fw; | |
1030 | carl9170_usb_firmware_finish(ar); | |
1031 | return; | |
1032 | } | |
1033 | ||
1034 | dev_err(&ar->udev->dev, "firmware not found.\n"); | |
1035 | carl9170_usb_firmware_failed(ar); | |
1036 | } | |
1037 | ||
1038 | static int carl9170_usb_probe(struct usb_interface *intf, | |
1039 | const struct usb_device_id *id) | |
1040 | { | |
671796dd | 1041 | struct usb_endpoint_descriptor *ep; |
a84fab3c CL |
1042 | struct ar9170 *ar; |
1043 | struct usb_device *udev; | |
671796dd | 1044 | int i, err; |
a84fab3c CL |
1045 | |
1046 | err = usb_reset_device(interface_to_usbdev(intf)); | |
1047 | if (err) | |
1048 | return err; | |
1049 | ||
1050 | ar = carl9170_alloc(sizeof(*ar)); | |
1051 | if (IS_ERR(ar)) | |
1052 | return PTR_ERR(ar); | |
1053 | ||
1054 | udev = interface_to_usbdev(intf); | |
1055 | usb_get_dev(udev); | |
1056 | ar->udev = udev; | |
1057 | ar->intf = intf; | |
1058 | ar->features = id->driver_info; | |
1059 | ||
671796dd RW |
1060 | /* We need to remember the type of endpoint 4 because it differs |
1061 | * between high- and full-speed configuration. The high-speed | |
1062 | * configuration specifies it as interrupt and the full-speed | |
1063 | * configuration as bulk endpoint. This information is required | |
1064 | * later when sending urbs to that endpoint. | |
1065 | */ | |
1066 | for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; ++i) { | |
1067 | ep = &intf->cur_altsetting->endpoint[i].desc; | |
1068 | ||
1069 | if (usb_endpoint_num(ep) == AR9170_USB_EP_CMD && | |
1070 | usb_endpoint_dir_out(ep) && | |
1071 | usb_endpoint_type(ep) == USB_ENDPOINT_XFER_BULK) | |
1072 | ar->usb_ep_cmd_is_bulk = true; | |
1073 | } | |
1074 | ||
a84fab3c CL |
1075 | usb_set_intfdata(intf, ar); |
1076 | SET_IEEE80211_DEV(ar->hw, &intf->dev); | |
1077 | ||
1078 | init_usb_anchor(&ar->rx_anch); | |
1079 | init_usb_anchor(&ar->rx_pool); | |
1080 | init_usb_anchor(&ar->rx_work); | |
1081 | init_usb_anchor(&ar->tx_wait); | |
1082 | init_usb_anchor(&ar->tx_anch); | |
1083 | init_usb_anchor(&ar->tx_cmd); | |
1084 | init_usb_anchor(&ar->tx_err); | |
1085 | init_completion(&ar->cmd_wait); | |
1086 | init_completion(&ar->fw_boot_wait); | |
1087 | init_completion(&ar->fw_load_wait); | |
1088 | tasklet_init(&ar->usb_tasklet, carl9170_usb_tasklet, | |
1089 | (unsigned long)ar); | |
1090 | ||
1091 | atomic_set(&ar->tx_cmd_urbs, 0); | |
1092 | atomic_set(&ar->tx_anch_urbs, 0); | |
1093 | atomic_set(&ar->rx_work_urbs, 0); | |
1094 | atomic_set(&ar->rx_anch_urbs, 0); | |
1095 | atomic_set(&ar->rx_pool_urbs, 0); | |
a84fab3c CL |
1096 | |
1097 | usb_get_dev(ar->udev); | |
1098 | ||
1099 | carl9170_set_state(ar, CARL9170_STOPPED); | |
1100 | ||
5c2b6078 | 1101 | err = request_firmware_nowait(THIS_MODULE, 1, CARL9170FW_NAME, |
a84fab3c | 1102 | &ar->udev->dev, GFP_KERNEL, ar, carl9170_usb_firmware_step2); |
5c2b6078 AK |
1103 | if (err) { |
1104 | usb_put_dev(udev); | |
1105 | usb_put_dev(udev); | |
1106 | carl9170_free(ar); | |
1107 | } | |
1108 | return err; | |
a84fab3c CL |
1109 | } |
1110 | ||
1111 | static void carl9170_usb_disconnect(struct usb_interface *intf) | |
1112 | { | |
1113 | struct ar9170 *ar = usb_get_intfdata(intf); | |
1114 | struct usb_device *udev; | |
1115 | ||
1116 | if (WARN_ON(!ar)) | |
1117 | return; | |
1118 | ||
1119 | udev = ar->udev; | |
1120 | wait_for_completion(&ar->fw_load_wait); | |
1121 | ||
1122 | if (IS_INITIALIZED(ar)) { | |
1123 | carl9170_reboot(ar); | |
1124 | carl9170_usb_stop(ar); | |
1125 | } | |
1126 | ||
1127 | carl9170_usb_cancel_urbs(ar); | |
1128 | carl9170_unregister(ar); | |
1129 | ||
1130 | usb_set_intfdata(intf, NULL); | |
1131 | ||
1132 | carl9170_release_firmware(ar); | |
1133 | carl9170_free(ar); | |
1134 | usb_put_dev(udev); | |
1135 | } | |
1136 | ||
1137 | #ifdef CONFIG_PM | |
1138 | static int carl9170_usb_suspend(struct usb_interface *intf, | |
1139 | pm_message_t message) | |
1140 | { | |
1141 | struct ar9170 *ar = usb_get_intfdata(intf); | |
1142 | ||
1143 | if (!ar) | |
1144 | return -ENODEV; | |
1145 | ||
1146 | carl9170_usb_cancel_urbs(ar); | |
1147 | ||
a84fab3c CL |
1148 | return 0; |
1149 | } | |
1150 | ||
1151 | static int carl9170_usb_resume(struct usb_interface *intf) | |
1152 | { | |
1153 | struct ar9170 *ar = usb_get_intfdata(intf); | |
1154 | int err; | |
1155 | ||
1156 | if (!ar) | |
1157 | return -ENODEV; | |
1158 | ||
1159 | usb_unpoison_anchored_urbs(&ar->rx_anch); | |
97e2c402 | 1160 | carl9170_set_state(ar, CARL9170_STOPPED); |
a84fab3c | 1161 | |
97e2c402 CL |
1162 | /* |
1163 | * The USB documentation demands that [for suspend] all traffic | |
1164 | * to and from the device has to stop. This would be fine, but | |
1165 | * there's a catch: the device[usb phy] does not come back. | |
1166 | * | |
1167 | * Upon resume the firmware will "kill" itself and the | |
1168 | * boot-code sorts out the magic voodoo. | |
1169 | * Not very nice, but there's not much what could go wrong. | |
1170 | */ | |
1171 | msleep(1100); | |
a84fab3c | 1172 | |
97e2c402 | 1173 | err = carl9170_usb_init_device(ar); |
a84fab3c CL |
1174 | if (err) |
1175 | goto err_unrx; | |
1176 | ||
1177 | return 0; | |
1178 | ||
1179 | err_unrx: | |
1180 | carl9170_usb_cancel_urbs(ar); | |
1181 | ||
1182 | return err; | |
1183 | } | |
1184 | #endif /* CONFIG_PM */ | |
1185 | ||
1186 | static struct usb_driver carl9170_driver = { | |
1187 | .name = KBUILD_MODNAME, | |
1188 | .probe = carl9170_usb_probe, | |
1189 | .disconnect = carl9170_usb_disconnect, | |
1190 | .id_table = carl9170_usb_ids, | |
1191 | .soft_unbind = 1, | |
1192 | #ifdef CONFIG_PM | |
1193 | .suspend = carl9170_usb_suspend, | |
1194 | .resume = carl9170_usb_resume, | |
97e2c402 | 1195 | .reset_resume = carl9170_usb_resume, |
a84fab3c | 1196 | #endif /* CONFIG_PM */ |
e1f12eb6 | 1197 | .disable_hub_initiated_lpm = 1, |
a84fab3c CL |
1198 | }; |
1199 | ||
d632eb1b | 1200 | module_usb_driver(carl9170_driver); |