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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) }, | |
115 | /* AVM FRITZ!WLAN USB Stick N */ | |
116 | { USB_DEVICE(0x057c, 0x8401) }, | |
117 | /* AVM FRITZ!WLAN USB Stick N 2.4 */ | |
118 | { USB_DEVICE(0x057c, 0x8402) }, | |
119 | /* Qwest/Actiontec 802AIN Wireless N USB Network Adapter */ | |
120 | { USB_DEVICE(0x1668, 0x1200) }, | |
c86664e5 JP |
121 | /* Airlive X.USB a/b/g/n */ |
122 | { USB_DEVICE(0x1b75, 0x9170) }, | |
a84fab3c CL |
123 | |
124 | /* terminate */ | |
125 | {} | |
126 | }; | |
127 | MODULE_DEVICE_TABLE(usb, carl9170_usb_ids); | |
128 | ||
129 | static void carl9170_usb_submit_data_urb(struct ar9170 *ar) | |
130 | { | |
131 | struct urb *urb; | |
132 | int err; | |
133 | ||
134 | if (atomic_inc_return(&ar->tx_anch_urbs) > AR9170_NUM_TX_URBS) | |
135 | goto err_acc; | |
136 | ||
137 | urb = usb_get_from_anchor(&ar->tx_wait); | |
138 | if (!urb) | |
139 | goto err_acc; | |
140 | ||
141 | usb_anchor_urb(urb, &ar->tx_anch); | |
142 | ||
143 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
144 | if (unlikely(err)) { | |
145 | if (net_ratelimit()) { | |
146 | dev_err(&ar->udev->dev, "tx submit failed (%d)\n", | |
147 | urb->status); | |
148 | } | |
149 | ||
150 | usb_unanchor_urb(urb); | |
151 | usb_anchor_urb(urb, &ar->tx_err); | |
152 | } | |
153 | ||
154 | usb_free_urb(urb); | |
155 | ||
156 | if (likely(err == 0)) | |
157 | return; | |
158 | ||
159 | err_acc: | |
160 | atomic_dec(&ar->tx_anch_urbs); | |
161 | } | |
162 | ||
163 | static void carl9170_usb_tx_data_complete(struct urb *urb) | |
164 | { | |
b2767363 | 165 | struct ar9170 *ar = usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); |
a84fab3c CL |
166 | |
167 | if (WARN_ON_ONCE(!ar)) { | |
168 | dev_kfree_skb_irq(urb->context); | |
169 | return; | |
170 | } | |
171 | ||
172 | atomic_dec(&ar->tx_anch_urbs); | |
173 | ||
174 | switch (urb->status) { | |
175 | /* everything is fine */ | |
176 | case 0: | |
177 | carl9170_tx_callback(ar, (void *)urb->context); | |
178 | break; | |
179 | ||
180 | /* disconnect */ | |
181 | case -ENOENT: | |
182 | case -ECONNRESET: | |
183 | case -ENODEV: | |
184 | case -ESHUTDOWN: | |
185 | /* | |
186 | * Defer the frame clean-up to the tasklet worker. | |
187 | * This is necessary, because carl9170_tx_drop | |
188 | * does not work in an irqsave context. | |
189 | */ | |
190 | usb_anchor_urb(urb, &ar->tx_err); | |
191 | return; | |
192 | ||
193 | /* a random transmission error has occurred? */ | |
194 | default: | |
195 | if (net_ratelimit()) { | |
196 | dev_err(&ar->udev->dev, "tx failed (%d)\n", | |
197 | urb->status); | |
198 | } | |
199 | ||
200 | usb_anchor_urb(urb, &ar->tx_err); | |
201 | break; | |
202 | } | |
203 | ||
204 | if (likely(IS_STARTED(ar))) | |
205 | carl9170_usb_submit_data_urb(ar); | |
206 | } | |
207 | ||
208 | static int carl9170_usb_submit_cmd_urb(struct ar9170 *ar) | |
209 | { | |
210 | struct urb *urb; | |
211 | int err; | |
212 | ||
213 | if (atomic_inc_return(&ar->tx_cmd_urbs) != 1) { | |
214 | atomic_dec(&ar->tx_cmd_urbs); | |
215 | return 0; | |
216 | } | |
217 | ||
218 | urb = usb_get_from_anchor(&ar->tx_cmd); | |
219 | if (!urb) { | |
220 | atomic_dec(&ar->tx_cmd_urbs); | |
221 | return 0; | |
222 | } | |
223 | ||
224 | usb_anchor_urb(urb, &ar->tx_anch); | |
225 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
226 | if (unlikely(err)) { | |
227 | usb_unanchor_urb(urb); | |
228 | atomic_dec(&ar->tx_cmd_urbs); | |
229 | } | |
230 | usb_free_urb(urb); | |
231 | ||
232 | return err; | |
233 | } | |
234 | ||
235 | static void carl9170_usb_cmd_complete(struct urb *urb) | |
236 | { | |
237 | struct ar9170 *ar = urb->context; | |
238 | int err = 0; | |
239 | ||
240 | if (WARN_ON_ONCE(!ar)) | |
241 | return; | |
242 | ||
243 | atomic_dec(&ar->tx_cmd_urbs); | |
244 | ||
245 | switch (urb->status) { | |
246 | /* everything is fine */ | |
247 | case 0: | |
248 | break; | |
249 | ||
250 | /* disconnect */ | |
251 | case -ENOENT: | |
252 | case -ECONNRESET: | |
253 | case -ENODEV: | |
254 | case -ESHUTDOWN: | |
255 | return; | |
256 | ||
257 | default: | |
258 | err = urb->status; | |
259 | break; | |
260 | } | |
261 | ||
262 | if (!IS_INITIALIZED(ar)) | |
263 | return; | |
264 | ||
265 | if (err) | |
266 | dev_err(&ar->udev->dev, "submit cmd cb failed (%d).\n", err); | |
267 | ||
268 | err = carl9170_usb_submit_cmd_urb(ar); | |
269 | if (err) | |
270 | dev_err(&ar->udev->dev, "submit cmd failed (%d).\n", err); | |
271 | } | |
272 | ||
273 | static void carl9170_usb_rx_irq_complete(struct urb *urb) | |
274 | { | |
275 | struct ar9170 *ar = urb->context; | |
276 | ||
277 | if (WARN_ON_ONCE(!ar)) | |
278 | return; | |
279 | ||
280 | switch (urb->status) { | |
281 | /* everything is fine */ | |
282 | case 0: | |
283 | break; | |
284 | ||
285 | /* disconnect */ | |
286 | case -ENOENT: | |
287 | case -ECONNRESET: | |
288 | case -ENODEV: | |
289 | case -ESHUTDOWN: | |
290 | return; | |
291 | ||
292 | default: | |
293 | goto resubmit; | |
294 | } | |
295 | ||
296 | carl9170_handle_command_response(ar, urb->transfer_buffer, | |
297 | urb->actual_length); | |
298 | ||
299 | resubmit: | |
300 | usb_anchor_urb(urb, &ar->rx_anch); | |
301 | if (unlikely(usb_submit_urb(urb, GFP_ATOMIC))) | |
302 | usb_unanchor_urb(urb); | |
303 | } | |
304 | ||
305 | static int carl9170_usb_submit_rx_urb(struct ar9170 *ar, gfp_t gfp) | |
306 | { | |
307 | struct urb *urb; | |
308 | int err = 0, runs = 0; | |
309 | ||
310 | while ((atomic_read(&ar->rx_anch_urbs) < AR9170_NUM_RX_URBS) && | |
311 | (runs++ < AR9170_NUM_RX_URBS)) { | |
312 | err = -ENOSPC; | |
313 | urb = usb_get_from_anchor(&ar->rx_pool); | |
314 | if (urb) { | |
315 | usb_anchor_urb(urb, &ar->rx_anch); | |
316 | err = usb_submit_urb(urb, gfp); | |
317 | if (unlikely(err)) { | |
318 | usb_unanchor_urb(urb); | |
319 | usb_anchor_urb(urb, &ar->rx_pool); | |
320 | } else { | |
321 | atomic_dec(&ar->rx_pool_urbs); | |
322 | atomic_inc(&ar->rx_anch_urbs); | |
323 | } | |
324 | usb_free_urb(urb); | |
325 | } | |
326 | } | |
327 | ||
328 | return err; | |
329 | } | |
330 | ||
331 | static void carl9170_usb_rx_work(struct ar9170 *ar) | |
332 | { | |
333 | struct urb *urb; | |
334 | int i; | |
335 | ||
336 | for (i = 0; i < AR9170_NUM_RX_URBS_POOL; i++) { | |
337 | urb = usb_get_from_anchor(&ar->rx_work); | |
338 | if (!urb) | |
339 | break; | |
340 | ||
341 | atomic_dec(&ar->rx_work_urbs); | |
342 | if (IS_INITIALIZED(ar)) { | |
343 | carl9170_rx(ar, urb->transfer_buffer, | |
344 | urb->actual_length); | |
345 | } | |
346 | ||
347 | usb_anchor_urb(urb, &ar->rx_pool); | |
348 | atomic_inc(&ar->rx_pool_urbs); | |
349 | ||
350 | usb_free_urb(urb); | |
351 | ||
352 | carl9170_usb_submit_rx_urb(ar, GFP_ATOMIC); | |
353 | } | |
354 | } | |
355 | ||
356 | void carl9170_usb_handle_tx_err(struct ar9170 *ar) | |
357 | { | |
358 | struct urb *urb; | |
359 | ||
360 | while ((urb = usb_get_from_anchor(&ar->tx_err))) { | |
361 | struct sk_buff *skb = (void *)urb->context; | |
362 | ||
363 | carl9170_tx_drop(ar, skb); | |
364 | carl9170_tx_callback(ar, skb); | |
365 | usb_free_urb(urb); | |
366 | } | |
367 | } | |
368 | ||
369 | static void carl9170_usb_tasklet(unsigned long data) | |
370 | { | |
371 | struct ar9170 *ar = (struct ar9170 *) data; | |
372 | ||
cf6487d0 CL |
373 | if (!IS_INITIALIZED(ar)) |
374 | return; | |
375 | ||
a84fab3c CL |
376 | carl9170_usb_rx_work(ar); |
377 | ||
378 | /* | |
379 | * Strictly speaking: The tx scheduler is not part of the USB system. | |
380 | * But the rx worker returns frames back to the mac80211-stack and | |
381 | * this is the _perfect_ place to generate the next transmissions. | |
382 | */ | |
383 | if (IS_STARTED(ar)) | |
384 | carl9170_tx_scheduler(ar); | |
385 | } | |
386 | ||
387 | static void carl9170_usb_rx_complete(struct urb *urb) | |
388 | { | |
389 | struct ar9170 *ar = (struct ar9170 *)urb->context; | |
390 | int err; | |
391 | ||
392 | if (WARN_ON_ONCE(!ar)) | |
393 | return; | |
394 | ||
395 | atomic_dec(&ar->rx_anch_urbs); | |
396 | ||
397 | switch (urb->status) { | |
398 | case 0: | |
399 | /* rx path */ | |
400 | usb_anchor_urb(urb, &ar->rx_work); | |
401 | atomic_inc(&ar->rx_work_urbs); | |
402 | break; | |
403 | ||
404 | case -ENOENT: | |
405 | case -ECONNRESET: | |
406 | case -ENODEV: | |
407 | case -ESHUTDOWN: | |
408 | /* handle disconnect events*/ | |
409 | return; | |
410 | ||
411 | default: | |
412 | /* handle all other errors */ | |
413 | usb_anchor_urb(urb, &ar->rx_pool); | |
414 | atomic_inc(&ar->rx_pool_urbs); | |
415 | break; | |
416 | } | |
417 | ||
418 | err = carl9170_usb_submit_rx_urb(ar, GFP_ATOMIC); | |
419 | if (unlikely(err)) { | |
420 | /* | |
421 | * usb_submit_rx_urb reported a problem. | |
422 | * In case this is due to a rx buffer shortage, | |
423 | * elevate the tasklet worker priority to | |
424 | * the highest available level. | |
425 | */ | |
426 | tasklet_hi_schedule(&ar->usb_tasklet); | |
427 | ||
428 | if (atomic_read(&ar->rx_anch_urbs) == 0) { | |
429 | /* | |
430 | * The system is too slow to cope with | |
431 | * the enormous workload. We have simply | |
432 | * run out of active rx urbs and this | |
25985edc | 433 | * unfortunately leads to an unpredictable |
a84fab3c CL |
434 | * device. |
435 | */ | |
436 | ||
e4a668c5 | 437 | ieee80211_queue_work(ar->hw, &ar->ping_work); |
a84fab3c CL |
438 | } |
439 | } else { | |
440 | /* | |
441 | * Using anything less than _high_ priority absolutely | |
442 | * kills the rx performance my UP-System... | |
443 | */ | |
444 | tasklet_hi_schedule(&ar->usb_tasklet); | |
445 | } | |
446 | } | |
447 | ||
448 | static struct urb *carl9170_usb_alloc_rx_urb(struct ar9170 *ar, gfp_t gfp) | |
449 | { | |
450 | struct urb *urb; | |
451 | void *buf; | |
452 | ||
453 | buf = kmalloc(ar->fw.rx_size, gfp); | |
454 | if (!buf) | |
455 | return NULL; | |
456 | ||
457 | urb = usb_alloc_urb(0, gfp); | |
458 | if (!urb) { | |
459 | kfree(buf); | |
460 | return NULL; | |
461 | } | |
462 | ||
463 | usb_fill_bulk_urb(urb, ar->udev, usb_rcvbulkpipe(ar->udev, | |
464 | AR9170_USB_EP_RX), buf, ar->fw.rx_size, | |
465 | carl9170_usb_rx_complete, ar); | |
466 | ||
467 | urb->transfer_flags |= URB_FREE_BUFFER; | |
468 | ||
469 | return urb; | |
470 | } | |
471 | ||
472 | static int carl9170_usb_send_rx_irq_urb(struct ar9170 *ar) | |
473 | { | |
474 | struct urb *urb = NULL; | |
475 | void *ibuf; | |
476 | int err = -ENOMEM; | |
477 | ||
478 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
479 | if (!urb) | |
480 | goto out; | |
481 | ||
482 | ibuf = kmalloc(AR9170_USB_EP_CTRL_MAX, GFP_KERNEL); | |
483 | if (!ibuf) | |
484 | goto out; | |
485 | ||
486 | usb_fill_int_urb(urb, ar->udev, usb_rcvintpipe(ar->udev, | |
487 | AR9170_USB_EP_IRQ), ibuf, AR9170_USB_EP_CTRL_MAX, | |
488 | carl9170_usb_rx_irq_complete, ar, 1); | |
489 | ||
490 | urb->transfer_flags |= URB_FREE_BUFFER; | |
491 | ||
492 | usb_anchor_urb(urb, &ar->rx_anch); | |
493 | err = usb_submit_urb(urb, GFP_KERNEL); | |
494 | if (err) | |
495 | usb_unanchor_urb(urb); | |
496 | ||
497 | out: | |
498 | usb_free_urb(urb); | |
499 | return err; | |
500 | } | |
501 | ||
502 | static int carl9170_usb_init_rx_bulk_urbs(struct ar9170 *ar) | |
503 | { | |
504 | struct urb *urb; | |
505 | int i, err = -EINVAL; | |
506 | ||
507 | /* | |
508 | * The driver actively maintains a second shadow | |
509 | * pool for inactive, but fully-prepared rx urbs. | |
510 | * | |
511 | * The pool should help the driver to master huge | |
512 | * workload spikes without running the risk of | |
513 | * undersupplying the hardware or wasting time by | |
514 | * processing rx data (streams) inside the urb | |
515 | * completion (hardirq context). | |
516 | */ | |
517 | for (i = 0; i < AR9170_NUM_RX_URBS_POOL; i++) { | |
518 | urb = carl9170_usb_alloc_rx_urb(ar, GFP_KERNEL); | |
519 | if (!urb) { | |
520 | err = -ENOMEM; | |
521 | goto err_out; | |
522 | } | |
523 | ||
524 | usb_anchor_urb(urb, &ar->rx_pool); | |
525 | atomic_inc(&ar->rx_pool_urbs); | |
526 | usb_free_urb(urb); | |
527 | } | |
528 | ||
529 | err = carl9170_usb_submit_rx_urb(ar, GFP_KERNEL); | |
530 | if (err) | |
531 | goto err_out; | |
532 | ||
533 | /* the device now waiting for the firmware. */ | |
534 | carl9170_set_state_when(ar, CARL9170_STOPPED, CARL9170_IDLE); | |
535 | return 0; | |
536 | ||
537 | err_out: | |
538 | ||
539 | usb_scuttle_anchored_urbs(&ar->rx_pool); | |
540 | usb_scuttle_anchored_urbs(&ar->rx_work); | |
541 | usb_kill_anchored_urbs(&ar->rx_anch); | |
542 | return err; | |
543 | } | |
544 | ||
545 | static int carl9170_usb_flush(struct ar9170 *ar) | |
546 | { | |
547 | struct urb *urb; | |
548 | int ret, err = 0; | |
549 | ||
550 | while ((urb = usb_get_from_anchor(&ar->tx_wait))) { | |
551 | struct sk_buff *skb = (void *)urb->context; | |
552 | carl9170_tx_drop(ar, skb); | |
553 | carl9170_tx_callback(ar, skb); | |
554 | usb_free_urb(urb); | |
555 | } | |
556 | ||
dfa31fef | 557 | ret = usb_wait_anchor_empty_timeout(&ar->tx_cmd, 1000); |
a84fab3c CL |
558 | if (ret == 0) |
559 | err = -ETIMEDOUT; | |
560 | ||
561 | /* lets wait a while until the tx - queues are dried out */ | |
dfa31fef | 562 | ret = usb_wait_anchor_empty_timeout(&ar->tx_anch, 1000); |
a84fab3c CL |
563 | if (ret == 0) |
564 | err = -ETIMEDOUT; | |
565 | ||
566 | usb_kill_anchored_urbs(&ar->tx_anch); | |
567 | carl9170_usb_handle_tx_err(ar); | |
568 | ||
569 | return err; | |
570 | } | |
571 | ||
572 | static void carl9170_usb_cancel_urbs(struct ar9170 *ar) | |
573 | { | |
574 | int err; | |
575 | ||
576 | carl9170_set_state(ar, CARL9170_UNKNOWN_STATE); | |
577 | ||
578 | err = carl9170_usb_flush(ar); | |
579 | if (err) | |
580 | dev_err(&ar->udev->dev, "stuck tx urbs!\n"); | |
581 | ||
582 | usb_poison_anchored_urbs(&ar->tx_anch); | |
583 | carl9170_usb_handle_tx_err(ar); | |
584 | usb_poison_anchored_urbs(&ar->rx_anch); | |
585 | ||
586 | tasklet_kill(&ar->usb_tasklet); | |
587 | ||
588 | usb_scuttle_anchored_urbs(&ar->rx_work); | |
589 | usb_scuttle_anchored_urbs(&ar->rx_pool); | |
590 | usb_scuttle_anchored_urbs(&ar->tx_cmd); | |
591 | } | |
592 | ||
593 | int __carl9170_exec_cmd(struct ar9170 *ar, struct carl9170_cmd *cmd, | |
594 | const bool free_buf) | |
595 | { | |
596 | struct urb *urb; | |
cae7f953 | 597 | int err = 0; |
a84fab3c | 598 | |
cae7f953 CL |
599 | if (!IS_INITIALIZED(ar)) { |
600 | err = -EPERM; | |
601 | goto err_free; | |
602 | } | |
a84fab3c | 603 | |
cae7f953 CL |
604 | if (WARN_ON(cmd->hdr.len > CARL9170_MAX_CMD_LEN - 4)) { |
605 | err = -EINVAL; | |
606 | goto err_free; | |
607 | } | |
a84fab3c CL |
608 | |
609 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
cae7f953 CL |
610 | if (!urb) { |
611 | err = -ENOMEM; | |
612 | goto err_free; | |
613 | } | |
a84fab3c CL |
614 | |
615 | usb_fill_int_urb(urb, ar->udev, usb_sndintpipe(ar->udev, | |
616 | AR9170_USB_EP_CMD), cmd, cmd->hdr.len + 4, | |
617 | carl9170_usb_cmd_complete, ar, 1); | |
618 | ||
a84fab3c CL |
619 | if (free_buf) |
620 | urb->transfer_flags |= URB_FREE_BUFFER; | |
621 | ||
622 | usb_anchor_urb(urb, &ar->tx_cmd); | |
623 | usb_free_urb(urb); | |
624 | ||
625 | return carl9170_usb_submit_cmd_urb(ar); | |
cae7f953 CL |
626 | |
627 | err_free: | |
628 | if (free_buf) | |
629 | kfree(cmd); | |
630 | ||
631 | return err; | |
a84fab3c CL |
632 | } |
633 | ||
634 | int carl9170_exec_cmd(struct ar9170 *ar, const enum carl9170_cmd_oids cmd, | |
635 | unsigned int plen, void *payload, unsigned int outlen, void *out) | |
636 | { | |
637 | int err = -ENOMEM; | |
638 | ||
639 | if (!IS_ACCEPTING_CMD(ar)) | |
640 | return -EIO; | |
641 | ||
642 | if (!(cmd & CARL9170_CMD_ASYNC_FLAG)) | |
643 | might_sleep(); | |
644 | ||
645 | ar->cmd.hdr.len = plen; | |
646 | ar->cmd.hdr.cmd = cmd; | |
647 | /* writing multiple regs fills this buffer already */ | |
648 | if (plen && payload != (u8 *)(ar->cmd.data)) | |
649 | memcpy(ar->cmd.data, payload, plen); | |
650 | ||
651 | spin_lock_bh(&ar->cmd_lock); | |
652 | ar->readbuf = (u8 *)out; | |
653 | ar->readlen = outlen; | |
654 | spin_unlock_bh(&ar->cmd_lock); | |
655 | ||
656 | err = __carl9170_exec_cmd(ar, &ar->cmd, false); | |
657 | ||
658 | if (!(cmd & CARL9170_CMD_ASYNC_FLAG)) { | |
659 | err = wait_for_completion_timeout(&ar->cmd_wait, HZ); | |
660 | if (err == 0) { | |
661 | err = -ETIMEDOUT; | |
662 | goto err_unbuf; | |
663 | } | |
664 | ||
665 | if (ar->readlen != outlen) { | |
666 | err = -EMSGSIZE; | |
667 | goto err_unbuf; | |
668 | } | |
669 | } | |
670 | ||
671 | return 0; | |
672 | ||
673 | err_unbuf: | |
674 | /* Maybe the device was removed in the moment we were waiting? */ | |
675 | if (IS_STARTED(ar)) { | |
676 | dev_err(&ar->udev->dev, "no command feedback " | |
677 | "received (%d).\n", err); | |
678 | ||
679 | /* provide some maybe useful debug information */ | |
680 | print_hex_dump_bytes("carl9170 cmd: ", DUMP_PREFIX_NONE, | |
681 | &ar->cmd, plen + 4); | |
682 | ||
683 | carl9170_restart(ar, CARL9170_RR_COMMAND_TIMEOUT); | |
684 | } | |
685 | ||
686 | /* invalidate to avoid completing the next command prematurely */ | |
687 | spin_lock_bh(&ar->cmd_lock); | |
688 | ar->readbuf = NULL; | |
689 | ar->readlen = 0; | |
690 | spin_unlock_bh(&ar->cmd_lock); | |
691 | ||
692 | return err; | |
693 | } | |
694 | ||
695 | void carl9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb) | |
696 | { | |
697 | struct urb *urb; | |
698 | struct ar9170_stream *tx_stream; | |
699 | void *data; | |
700 | unsigned int len; | |
701 | ||
702 | if (!IS_STARTED(ar)) | |
703 | goto err_drop; | |
704 | ||
705 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
706 | if (!urb) | |
707 | goto err_drop; | |
708 | ||
709 | if (ar->fw.tx_stream) { | |
710 | tx_stream = (void *) (skb->data - sizeof(*tx_stream)); | |
711 | ||
712 | len = skb->len + sizeof(*tx_stream); | |
713 | tx_stream->length = cpu_to_le16(len); | |
714 | tx_stream->tag = cpu_to_le16(AR9170_TX_STREAM_TAG); | |
715 | data = tx_stream; | |
716 | } else { | |
717 | data = skb->data; | |
718 | len = skb->len; | |
719 | } | |
720 | ||
721 | usb_fill_bulk_urb(urb, ar->udev, usb_sndbulkpipe(ar->udev, | |
722 | AR9170_USB_EP_TX), data, len, | |
723 | carl9170_usb_tx_data_complete, skb); | |
724 | ||
725 | urb->transfer_flags |= URB_ZERO_PACKET; | |
726 | ||
727 | usb_anchor_urb(urb, &ar->tx_wait); | |
728 | ||
729 | usb_free_urb(urb); | |
730 | ||
731 | carl9170_usb_submit_data_urb(ar); | |
732 | return; | |
733 | ||
734 | err_drop: | |
735 | carl9170_tx_drop(ar, skb); | |
736 | carl9170_tx_callback(ar, skb); | |
737 | } | |
738 | ||
739 | static void carl9170_release_firmware(struct ar9170 *ar) | |
740 | { | |
741 | if (ar->fw.fw) { | |
742 | release_firmware(ar->fw.fw); | |
743 | memset(&ar->fw, 0, sizeof(ar->fw)); | |
744 | } | |
745 | } | |
746 | ||
747 | void carl9170_usb_stop(struct ar9170 *ar) | |
748 | { | |
749 | int ret; | |
750 | ||
751 | carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STOPPED); | |
752 | ||
753 | ret = carl9170_usb_flush(ar); | |
754 | if (ret) | |
755 | dev_err(&ar->udev->dev, "kill pending tx urbs.\n"); | |
756 | ||
757 | usb_poison_anchored_urbs(&ar->tx_anch); | |
758 | carl9170_usb_handle_tx_err(ar); | |
759 | ||
760 | /* kill any pending command */ | |
761 | spin_lock_bh(&ar->cmd_lock); | |
762 | ar->readlen = 0; | |
763 | spin_unlock_bh(&ar->cmd_lock); | |
764 | complete_all(&ar->cmd_wait); | |
765 | ||
766 | /* This is required to prevent an early completion on _start */ | |
767 | INIT_COMPLETION(ar->cmd_wait); | |
768 | ||
769 | /* | |
770 | * Note: | |
771 | * So far we freed all tx urbs, but we won't dare to touch any rx urbs. | |
772 | * Else we would end up with a unresponsive device... | |
773 | */ | |
774 | } | |
775 | ||
776 | int carl9170_usb_open(struct ar9170 *ar) | |
777 | { | |
778 | usb_unpoison_anchored_urbs(&ar->tx_anch); | |
779 | ||
780 | carl9170_set_state_when(ar, CARL9170_STOPPED, CARL9170_IDLE); | |
781 | return 0; | |
782 | } | |
783 | ||
784 | static int carl9170_usb_load_firmware(struct ar9170 *ar) | |
785 | { | |
786 | const u8 *data; | |
787 | u8 *buf; | |
788 | unsigned int transfer; | |
789 | size_t len; | |
790 | u32 addr; | |
791 | int err = 0; | |
792 | ||
793 | buf = kmalloc(4096, GFP_KERNEL); | |
794 | if (!buf) { | |
795 | err = -ENOMEM; | |
796 | goto err_out; | |
797 | } | |
798 | ||
799 | data = ar->fw.fw->data; | |
800 | len = ar->fw.fw->size; | |
801 | addr = ar->fw.address; | |
802 | ||
803 | /* this removes the miniboot image */ | |
804 | data += ar->fw.offset; | |
805 | len -= ar->fw.offset; | |
806 | ||
807 | while (len) { | |
808 | transfer = min_t(unsigned int, len, 4096u); | |
809 | memcpy(buf, data, transfer); | |
810 | ||
811 | err = usb_control_msg(ar->udev, usb_sndctrlpipe(ar->udev, 0), | |
812 | 0x30 /* FW DL */, 0x40 | USB_DIR_OUT, | |
813 | addr >> 8, 0, buf, transfer, 100); | |
814 | ||
815 | if (err < 0) { | |
816 | kfree(buf); | |
817 | goto err_out; | |
818 | } | |
819 | ||
820 | len -= transfer; | |
821 | data += transfer; | |
822 | addr += transfer; | |
823 | } | |
824 | kfree(buf); | |
825 | ||
826 | err = usb_control_msg(ar->udev, usb_sndctrlpipe(ar->udev, 0), | |
827 | 0x31 /* FW DL COMPLETE */, | |
828 | 0x40 | USB_DIR_OUT, 0, 0, NULL, 0, 200); | |
829 | ||
830 | if (wait_for_completion_timeout(&ar->fw_boot_wait, HZ) == 0) { | |
831 | err = -ETIMEDOUT; | |
832 | goto err_out; | |
833 | } | |
834 | ||
835 | err = carl9170_echo_test(ar, 0x4a110123); | |
836 | if (err) | |
837 | goto err_out; | |
838 | ||
97e2c402 | 839 | /* now, start the command response counter */ |
a84fab3c CL |
840 | ar->cmd_seq = -1; |
841 | ||
842 | return 0; | |
843 | ||
844 | err_out: | |
845 | dev_err(&ar->udev->dev, "firmware upload failed (%d).\n", err); | |
846 | return err; | |
847 | } | |
848 | ||
849 | int carl9170_usb_restart(struct ar9170 *ar) | |
850 | { | |
851 | int err = 0; | |
852 | ||
853 | if (ar->intf->condition != USB_INTERFACE_BOUND) | |
854 | return 0; | |
855 | ||
97e2c402 CL |
856 | /* |
857 | * Disable the command response sequence counter check. | |
858 | * We already know that the device/firmware is in a bad state. | |
859 | * So, no extra points are awarded to anyone who reminds the | |
860 | * driver about that. | |
861 | */ | |
a84fab3c CL |
862 | ar->cmd_seq = -2; |
863 | ||
864 | err = carl9170_reboot(ar); | |
865 | ||
866 | carl9170_usb_stop(ar); | |
867 | ||
a84fab3c CL |
868 | if (err) |
869 | goto err_out; | |
870 | ||
871 | tasklet_schedule(&ar->usb_tasklet); | |
872 | ||
873 | /* The reboot procedure can take quite a while to complete. */ | |
874 | msleep(1100); | |
875 | ||
876 | err = carl9170_usb_open(ar); | |
877 | if (err) | |
878 | goto err_out; | |
879 | ||
880 | err = carl9170_usb_load_firmware(ar); | |
881 | if (err) | |
882 | goto err_out; | |
883 | ||
884 | return 0; | |
885 | ||
886 | err_out: | |
887 | carl9170_usb_cancel_urbs(ar); | |
888 | return err; | |
889 | } | |
890 | ||
891 | void carl9170_usb_reset(struct ar9170 *ar) | |
892 | { | |
893 | /* | |
894 | * This is the last resort to get the device going again | |
895 | * without any *user replugging action*. | |
896 | * | |
897 | * But there is a catch: usb_reset really is like a physical | |
898 | * *reconnect*. The mac80211 state will be lost in the process. | |
899 | * Therefore a userspace application, which is monitoring | |
900 | * the link must step in. | |
901 | */ | |
902 | carl9170_usb_cancel_urbs(ar); | |
903 | ||
904 | carl9170_usb_stop(ar); | |
905 | ||
906 | usb_queue_reset_device(ar->intf); | |
907 | } | |
908 | ||
909 | static int carl9170_usb_init_device(struct ar9170 *ar) | |
910 | { | |
911 | int err; | |
912 | ||
97e2c402 CL |
913 | /* |
914 | * The carl9170 firmware let's the driver know when it's | |
915 | * ready for action. But we have to be prepared to gracefully | |
916 | * handle all spurious [flushed] messages after each (re-)boot. | |
917 | * Thus the command response counter remains disabled until it | |
918 | * can be safely synchronized. | |
919 | */ | |
920 | ar->cmd_seq = -2; | |
921 | ||
a84fab3c CL |
922 | err = carl9170_usb_send_rx_irq_urb(ar); |
923 | if (err) | |
924 | goto err_out; | |
925 | ||
926 | err = carl9170_usb_init_rx_bulk_urbs(ar); | |
927 | if (err) | |
928 | goto err_unrx; | |
929 | ||
97e2c402 CL |
930 | err = carl9170_usb_open(ar); |
931 | if (err) | |
932 | goto err_unrx; | |
933 | ||
a84fab3c CL |
934 | mutex_lock(&ar->mutex); |
935 | err = carl9170_usb_load_firmware(ar); | |
936 | mutex_unlock(&ar->mutex); | |
937 | if (err) | |
97e2c402 | 938 | goto err_stop; |
a84fab3c CL |
939 | |
940 | return 0; | |
941 | ||
97e2c402 CL |
942 | err_stop: |
943 | carl9170_usb_stop(ar); | |
944 | ||
a84fab3c CL |
945 | err_unrx: |
946 | carl9170_usb_cancel_urbs(ar); | |
947 | ||
948 | err_out: | |
949 | return err; | |
950 | } | |
951 | ||
952 | static void carl9170_usb_firmware_failed(struct ar9170 *ar) | |
953 | { | |
954 | struct device *parent = ar->udev->dev.parent; | |
955 | struct usb_device *udev; | |
956 | ||
957 | /* | |
958 | * Store a copy of the usb_device pointer locally. | |
959 | * This is because device_release_driver initiates | |
960 | * carl9170_usb_disconnect, which in turn frees our | |
961 | * driver context (ar). | |
962 | */ | |
963 | udev = ar->udev; | |
964 | ||
965 | complete(&ar->fw_load_wait); | |
966 | ||
967 | /* unbind anything failed */ | |
968 | if (parent) | |
969 | device_lock(parent); | |
970 | ||
971 | device_release_driver(&udev->dev); | |
972 | if (parent) | |
973 | device_unlock(parent); | |
974 | ||
975 | usb_put_dev(udev); | |
976 | } | |
977 | ||
978 | static void carl9170_usb_firmware_finish(struct ar9170 *ar) | |
979 | { | |
980 | int err; | |
981 | ||
982 | err = carl9170_parse_firmware(ar); | |
983 | if (err) | |
984 | goto err_freefw; | |
985 | ||
986 | err = carl9170_usb_init_device(ar); | |
987 | if (err) | |
988 | goto err_freefw; | |
989 | ||
a84fab3c CL |
990 | err = carl9170_register(ar); |
991 | ||
992 | carl9170_usb_stop(ar); | |
993 | if (err) | |
994 | goto err_unrx; | |
995 | ||
996 | complete(&ar->fw_load_wait); | |
997 | usb_put_dev(ar->udev); | |
998 | return; | |
999 | ||
1000 | err_unrx: | |
1001 | carl9170_usb_cancel_urbs(ar); | |
1002 | ||
1003 | err_freefw: | |
1004 | carl9170_release_firmware(ar); | |
1005 | carl9170_usb_firmware_failed(ar); | |
1006 | } | |
1007 | ||
1008 | static void carl9170_usb_firmware_step2(const struct firmware *fw, | |
1009 | void *context) | |
1010 | { | |
1011 | struct ar9170 *ar = context; | |
1012 | ||
1013 | if (fw) { | |
1014 | ar->fw.fw = fw; | |
1015 | carl9170_usb_firmware_finish(ar); | |
1016 | return; | |
1017 | } | |
1018 | ||
1019 | dev_err(&ar->udev->dev, "firmware not found.\n"); | |
1020 | carl9170_usb_firmware_failed(ar); | |
1021 | } | |
1022 | ||
1023 | static int carl9170_usb_probe(struct usb_interface *intf, | |
1024 | const struct usb_device_id *id) | |
1025 | { | |
1026 | struct ar9170 *ar; | |
1027 | struct usb_device *udev; | |
1028 | int err; | |
1029 | ||
1030 | err = usb_reset_device(interface_to_usbdev(intf)); | |
1031 | if (err) | |
1032 | return err; | |
1033 | ||
1034 | ar = carl9170_alloc(sizeof(*ar)); | |
1035 | if (IS_ERR(ar)) | |
1036 | return PTR_ERR(ar); | |
1037 | ||
1038 | udev = interface_to_usbdev(intf); | |
1039 | usb_get_dev(udev); | |
1040 | ar->udev = udev; | |
1041 | ar->intf = intf; | |
1042 | ar->features = id->driver_info; | |
1043 | ||
1044 | usb_set_intfdata(intf, ar); | |
1045 | SET_IEEE80211_DEV(ar->hw, &intf->dev); | |
1046 | ||
1047 | init_usb_anchor(&ar->rx_anch); | |
1048 | init_usb_anchor(&ar->rx_pool); | |
1049 | init_usb_anchor(&ar->rx_work); | |
1050 | init_usb_anchor(&ar->tx_wait); | |
1051 | init_usb_anchor(&ar->tx_anch); | |
1052 | init_usb_anchor(&ar->tx_cmd); | |
1053 | init_usb_anchor(&ar->tx_err); | |
1054 | init_completion(&ar->cmd_wait); | |
1055 | init_completion(&ar->fw_boot_wait); | |
1056 | init_completion(&ar->fw_load_wait); | |
1057 | tasklet_init(&ar->usb_tasklet, carl9170_usb_tasklet, | |
1058 | (unsigned long)ar); | |
1059 | ||
1060 | atomic_set(&ar->tx_cmd_urbs, 0); | |
1061 | atomic_set(&ar->tx_anch_urbs, 0); | |
1062 | atomic_set(&ar->rx_work_urbs, 0); | |
1063 | atomic_set(&ar->rx_anch_urbs, 0); | |
1064 | atomic_set(&ar->rx_pool_urbs, 0); | |
a84fab3c CL |
1065 | |
1066 | usb_get_dev(ar->udev); | |
1067 | ||
1068 | carl9170_set_state(ar, CARL9170_STOPPED); | |
1069 | ||
1070 | return request_firmware_nowait(THIS_MODULE, 1, CARL9170FW_NAME, | |
1071 | &ar->udev->dev, GFP_KERNEL, ar, carl9170_usb_firmware_step2); | |
1072 | } | |
1073 | ||
1074 | static void carl9170_usb_disconnect(struct usb_interface *intf) | |
1075 | { | |
1076 | struct ar9170 *ar = usb_get_intfdata(intf); | |
1077 | struct usb_device *udev; | |
1078 | ||
1079 | if (WARN_ON(!ar)) | |
1080 | return; | |
1081 | ||
1082 | udev = ar->udev; | |
1083 | wait_for_completion(&ar->fw_load_wait); | |
1084 | ||
1085 | if (IS_INITIALIZED(ar)) { | |
1086 | carl9170_reboot(ar); | |
1087 | carl9170_usb_stop(ar); | |
1088 | } | |
1089 | ||
1090 | carl9170_usb_cancel_urbs(ar); | |
1091 | carl9170_unregister(ar); | |
1092 | ||
1093 | usb_set_intfdata(intf, NULL); | |
1094 | ||
1095 | carl9170_release_firmware(ar); | |
1096 | carl9170_free(ar); | |
1097 | usb_put_dev(udev); | |
1098 | } | |
1099 | ||
1100 | #ifdef CONFIG_PM | |
1101 | static int carl9170_usb_suspend(struct usb_interface *intf, | |
1102 | pm_message_t message) | |
1103 | { | |
1104 | struct ar9170 *ar = usb_get_intfdata(intf); | |
1105 | ||
1106 | if (!ar) | |
1107 | return -ENODEV; | |
1108 | ||
1109 | carl9170_usb_cancel_urbs(ar); | |
1110 | ||
a84fab3c CL |
1111 | return 0; |
1112 | } | |
1113 | ||
1114 | static int carl9170_usb_resume(struct usb_interface *intf) | |
1115 | { | |
1116 | struct ar9170 *ar = usb_get_intfdata(intf); | |
1117 | int err; | |
1118 | ||
1119 | if (!ar) | |
1120 | return -ENODEV; | |
1121 | ||
1122 | usb_unpoison_anchored_urbs(&ar->rx_anch); | |
97e2c402 | 1123 | carl9170_set_state(ar, CARL9170_STOPPED); |
a84fab3c | 1124 | |
97e2c402 CL |
1125 | /* |
1126 | * The USB documentation demands that [for suspend] all traffic | |
1127 | * to and from the device has to stop. This would be fine, but | |
1128 | * there's a catch: the device[usb phy] does not come back. | |
1129 | * | |
1130 | * Upon resume the firmware will "kill" itself and the | |
1131 | * boot-code sorts out the magic voodoo. | |
1132 | * Not very nice, but there's not much what could go wrong. | |
1133 | */ | |
1134 | msleep(1100); | |
a84fab3c | 1135 | |
97e2c402 | 1136 | err = carl9170_usb_init_device(ar); |
a84fab3c CL |
1137 | if (err) |
1138 | goto err_unrx; | |
1139 | ||
1140 | return 0; | |
1141 | ||
1142 | err_unrx: | |
1143 | carl9170_usb_cancel_urbs(ar); | |
1144 | ||
1145 | return err; | |
1146 | } | |
1147 | #endif /* CONFIG_PM */ | |
1148 | ||
1149 | static struct usb_driver carl9170_driver = { | |
1150 | .name = KBUILD_MODNAME, | |
1151 | .probe = carl9170_usb_probe, | |
1152 | .disconnect = carl9170_usb_disconnect, | |
1153 | .id_table = carl9170_usb_ids, | |
1154 | .soft_unbind = 1, | |
1155 | #ifdef CONFIG_PM | |
1156 | .suspend = carl9170_usb_suspend, | |
1157 | .resume = carl9170_usb_resume, | |
97e2c402 | 1158 | .reset_resume = carl9170_usb_resume, |
a84fab3c CL |
1159 | #endif /* CONFIG_PM */ |
1160 | }; | |
1161 | ||
1162 | static int __init carl9170_usb_init(void) | |
1163 | { | |
1164 | return usb_register(&carl9170_driver); | |
1165 | } | |
1166 | ||
1167 | static void __exit carl9170_usb_exit(void) | |
1168 | { | |
1169 | usb_deregister(&carl9170_driver); | |
1170 | } | |
1171 | ||
1172 | module_init(carl9170_usb_init); | |
1173 | module_exit(carl9170_usb_exit); |