?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
proc: use seq_puts()/seq_putc() where possible
[linux-2.6/next.git] / drivers / net / wireless / ath / ar9170 / usb.c
blobd3be6f9816b5c0b6f7dded683eee5f04d26e0765
1 /*
2 * Atheros AR9170 driver
3 *
4 * USB - frontend
5 *
6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2009, Christian Lamparter <chunkeey@web.de>
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 "ar9170.h"
48 #include "cmd.h"
49 #include "hw.h"
50 #include "usb.h"
51
52 MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
53 MODULE_AUTHOR("Christian Lamparter <chunkeey@web.de>");
54 MODULE_LICENSE("GPL");
55 MODULE_DESCRIPTION("Atheros AR9170 802.11n USB wireless");
56 MODULE_FIRMWARE("ar9170.fw");
57
58 enum ar9170_requirements {
59 AR9170_REQ_FW1_ONLY = 1,
60 };
61
62 static struct usb_device_id ar9170_usb_ids[] = {
63 /* Atheros 9170 */
64 { USB_DEVICE(0x0cf3, 0x9170) },
65 /* Atheros TG121N */
66 { USB_DEVICE(0x0cf3, 0x1001) },
67 /* TP-Link TL-WN821N v2 */
68 { USB_DEVICE(0x0cf3, 0x1002) },
69 /* 3Com Dual Band 802.11n USB Adapter */
70 { USB_DEVICE(0x0cf3, 0x1010) },
71 /* H3C Dual Band 802.11n USB Adapter */
72 { USB_DEVICE(0x0cf3, 0x1011) },
73 /* Cace Airpcap NX */
74 { USB_DEVICE(0xcace, 0x0300) },
75 /* D-Link DWA 160 A1 */
76 { USB_DEVICE(0x07d1, 0x3c10) },
77 /* D-Link DWA 160 A2 */
78 { USB_DEVICE(0x07d1, 0x3a09) },
79 /* Netgear WNA1000 */
80 { USB_DEVICE(0x0846, 0x9040) },
81 /* Netgear WNDA3100 */
82 { USB_DEVICE(0x0846, 0x9010) },
83 /* Netgear WN111 v2 */
84 { USB_DEVICE(0x0846, 0x9001) },
85 /* Zydas ZD1221 */
86 { USB_DEVICE(0x0ace, 0x1221) },
87 /* Proxim ORiNOCO 802.11n USB */
88 { USB_DEVICE(0x1435, 0x0804) },
89 /* WNC Generic 11n USB Dongle */
90 { USB_DEVICE(0x1435, 0x0326) },
91 /* ZyXEL NWD271N */
92 { USB_DEVICE(0x0586, 0x3417) },
93 /* Z-Com UB81 BG */
94 { USB_DEVICE(0x0cde, 0x0023) },
95 /* Z-Com UB82 ABG */
96 { USB_DEVICE(0x0cde, 0x0026) },
97 /* Sphairon Homelink 1202 */
98 { USB_DEVICE(0x0cde, 0x0027) },
99 /* Arcadyan WN7512 */
100 { USB_DEVICE(0x083a, 0xf522) },
101 /* Planex GWUS300 */
102 { USB_DEVICE(0x2019, 0x5304) },
103 /* IO-Data WNGDNUS2 */
104 { USB_DEVICE(0x04bb, 0x093f) },
105 /* AVM FRITZ!WLAN USB Stick N */
106 { USB_DEVICE(0x057C, 0x8401) },
107 /* NEC WL300NU-G */
108 { USB_DEVICE(0x0409, 0x0249) },
109 /* AVM FRITZ!WLAN USB Stick N 2.4 */
110 { USB_DEVICE(0x057C, 0x8402), .driver_info = AR9170_REQ_FW1_ONLY },
111 /* Qwest/Actiontec 802AIN Wireless N USB Network Adapter */
112 { USB_DEVICE(0x1668, 0x1200) },
113
114 /* terminate */
115 {}
116 };
117 MODULE_DEVICE_TABLE(usb, ar9170_usb_ids);
118
119 static void ar9170_usb_submit_urb(struct ar9170_usb *aru)
120 {
121 struct urb *urb;
122 unsigned long flags;
123 int err;
124
125 if (unlikely(!IS_STARTED(&aru->common)))
126 return ;
127
128 spin_lock_irqsave(&aru->tx_urb_lock, flags);
129 if (atomic_read(&aru->tx_submitted_urbs) >= AR9170_NUM_TX_URBS) {
130 spin_unlock_irqrestore(&aru->tx_urb_lock, flags);
131 return ;
132 }
133 atomic_inc(&aru->tx_submitted_urbs);
134
135 urb = usb_get_from_anchor(&aru->tx_pending);
136 if (!urb) {
137 atomic_dec(&aru->tx_submitted_urbs);
138 spin_unlock_irqrestore(&aru->tx_urb_lock, flags);
139
140 return ;
141 }
142 spin_unlock_irqrestore(&aru->tx_urb_lock, flags);
143
144 aru->tx_pending_urbs--;
145 usb_anchor_urb(urb, &aru->tx_submitted);
146
147 err = usb_submit_urb(urb, GFP_ATOMIC);
148 if (unlikely(err)) {
149 if (ar9170_nag_limiter(&aru->common))
150 dev_err(&aru->udev->dev, "submit_urb failed (%d).\n",
151 err);
152
153 usb_unanchor_urb(urb);
154 atomic_dec(&aru->tx_submitted_urbs);
155 ar9170_tx_callback(&aru->common, urb->context);
156 }
157
158 usb_free_urb(urb);
159 }
160
161 static void ar9170_usb_tx_urb_complete_frame(struct urb *urb)
162 {
163 struct sk_buff *skb = urb->context;
164 struct ar9170_usb *aru = usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
165
166 if (unlikely(!aru)) {
167 dev_kfree_skb_irq(skb);
168 return ;
169 }
170
171 atomic_dec(&aru->tx_submitted_urbs);
172
173 ar9170_tx_callback(&aru->common, skb);
174
175 ar9170_usb_submit_urb(aru);
176 }
177
178 static void ar9170_usb_tx_urb_complete(struct urb *urb)
179 {
180 }
181
182 static void ar9170_usb_irq_completed(struct urb *urb)
183 {
184 struct ar9170_usb *aru = urb->context;
185
186 switch (urb->status) {
187 /* everything is fine */
188 case 0:
189 break;
190
191 /* disconnect */
192 case -ENOENT:
193 case -ECONNRESET:
194 case -ENODEV:
195 case -ESHUTDOWN:
196 goto free;
197
198 default:
199 goto resubmit;
200 }
201
202 ar9170_handle_command_response(&aru->common, urb->transfer_buffer,
203 urb->actual_length);
204
205 resubmit:
206 usb_anchor_urb(urb, &aru->rx_submitted);
207 if (usb_submit_urb(urb, GFP_ATOMIC)) {
208 usb_unanchor_urb(urb);
209 goto free;
210 }
211
212 return;
213
214 free:
215 usb_free_coherent(aru->udev, 64, urb->transfer_buffer, urb->transfer_dma);
216 }
217
218 static void ar9170_usb_rx_completed(struct urb *urb)
219 {
220 struct sk_buff *skb = urb->context;
221 struct ar9170_usb *aru = usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
222 int err;
223
224 if (!aru)
225 goto free;
226
227 switch (urb->status) {
228 /* everything is fine */
229 case 0:
230 break;
231
232 /* disconnect */
233 case -ENOENT:
234 case -ECONNRESET:
235 case -ENODEV:
236 case -ESHUTDOWN:
237 goto free;
238
239 default:
240 goto resubmit;
241 }
242
243 skb_put(skb, urb->actual_length);
244 ar9170_rx(&aru->common, skb);
245
246 resubmit:
247 skb_reset_tail_pointer(skb);
248 skb_trim(skb, 0);
249
250 usb_anchor_urb(urb, &aru->rx_submitted);
251 err = usb_submit_urb(urb, GFP_ATOMIC);
252 if (unlikely(err)) {
253 usb_unanchor_urb(urb);
254 goto free;
255 }
256
257 return ;
258
259 free:
260 dev_kfree_skb_irq(skb);
261 }
262
263 static int ar9170_usb_prep_rx_urb(struct ar9170_usb *aru,
264 struct urb *urb, gfp_t gfp)
265 {
266 struct sk_buff *skb;
267
268 skb = __dev_alloc_skb(AR9170_MAX_RX_BUFFER_SIZE + 32, gfp);
269 if (!skb)
270 return -ENOMEM;
271
272 /* reserve some space for mac80211's radiotap */
273 skb_reserve(skb, 32);
274
275 usb_fill_bulk_urb(urb, aru->udev,
276 usb_rcvbulkpipe(aru->udev, AR9170_EP_RX),
277 skb->data, min(skb_tailroom(skb),
278 AR9170_MAX_RX_BUFFER_SIZE),
279 ar9170_usb_rx_completed, skb);
280
281 return 0;
282 }
283
284 static int ar9170_usb_alloc_rx_irq_urb(struct ar9170_usb *aru)
285 {
286 struct urb *urb = NULL;
287 void *ibuf;
288 int err = -ENOMEM;
289
290 /* initialize interrupt endpoint */
291 urb = usb_alloc_urb(0, GFP_KERNEL);
292 if (!urb)
293 goto out;
294
295 ibuf = usb_alloc_coherent(aru->udev, 64, GFP_KERNEL, &urb->transfer_dma);
296 if (!ibuf)
297 goto out;
298
299 usb_fill_int_urb(urb, aru->udev,
300 usb_rcvintpipe(aru->udev, AR9170_EP_IRQ), ibuf,
301 64, ar9170_usb_irq_completed, aru, 1);
302 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
303
304 usb_anchor_urb(urb, &aru->rx_submitted);
305 err = usb_submit_urb(urb, GFP_KERNEL);
306 if (err) {
307 usb_unanchor_urb(urb);
308 usb_free_coherent(aru->udev, 64, urb->transfer_buffer,
309 urb->transfer_dma);
310 }
311
312 out:
313 usb_free_urb(urb);
314 return err;
315 }
316
317 static int ar9170_usb_alloc_rx_bulk_urbs(struct ar9170_usb *aru)
318 {
319 struct urb *urb;
320 int i;
321 int err = -EINVAL;
322
323 for (i = 0; i < AR9170_NUM_RX_URBS; i++) {
324 err = -ENOMEM;
325 urb = usb_alloc_urb(0, GFP_KERNEL);
326 if (!urb)
327 goto err_out;
328
329 err = ar9170_usb_prep_rx_urb(aru, urb, GFP_KERNEL);
330 if (err) {
331 usb_free_urb(urb);
332 goto err_out;
333 }
334
335 usb_anchor_urb(urb, &aru->rx_submitted);
336 err = usb_submit_urb(urb, GFP_KERNEL);
337 if (err) {
338 usb_unanchor_urb(urb);
339 dev_kfree_skb_any((void *) urb->transfer_buffer);
340 usb_free_urb(urb);
341 goto err_out;
342 }
343 usb_free_urb(urb);
344 }
345
346 /* the device now waiting for a firmware. */
347 aru->common.state = AR9170_IDLE;
348 return 0;
349
350 err_out:
351
352 usb_kill_anchored_urbs(&aru->rx_submitted);
353 return err;
354 }
355
356 static int ar9170_usb_flush(struct ar9170 *ar)
357 {
358 struct ar9170_usb *aru = (void *) ar;
359 struct urb *urb;
360 int ret, err = 0;
361
362 if (IS_STARTED(ar))
363 aru->common.state = AR9170_IDLE;
364
365 usb_wait_anchor_empty_timeout(&aru->tx_pending,
366 msecs_to_jiffies(800));
367 while ((urb = usb_get_from_anchor(&aru->tx_pending))) {
368 ar9170_tx_callback(&aru->common, (void *) urb->context);
369 usb_free_urb(urb);
370 }
371
372 /* lets wait a while until the tx - queues are dried out */
373 ret = usb_wait_anchor_empty_timeout(&aru->tx_submitted,
374 msecs_to_jiffies(100));
375 if (ret == 0)
376 err = -ETIMEDOUT;
377
378 usb_kill_anchored_urbs(&aru->tx_submitted);
379
380 if (IS_ACCEPTING_CMD(ar))
381 aru->common.state = AR9170_STARTED;
382
383 return err;
384 }
385
386 static void ar9170_usb_cancel_urbs(struct ar9170_usb *aru)
387 {
388 int err;
389
390 aru->common.state = AR9170_UNKNOWN_STATE;
391
392 err = ar9170_usb_flush(&aru->common);
393 if (err)
394 dev_err(&aru->udev->dev, "stuck tx urbs!\n");
395
396 usb_poison_anchored_urbs(&aru->tx_submitted);
397 usb_poison_anchored_urbs(&aru->rx_submitted);
398 }
399
400 static int ar9170_usb_exec_cmd(struct ar9170 *ar, enum ar9170_cmd cmd,
401 unsigned int plen, void *payload,
402 unsigned int outlen, void *out)
403 {
404 struct ar9170_usb *aru = (void *) ar;
405 struct urb *urb = NULL;
406 unsigned long flags;
407 int err = -ENOMEM;
408
409 if (unlikely(!IS_ACCEPTING_CMD(ar)))
410 return -EPERM;
411
412 if (WARN_ON(plen > AR9170_MAX_CMD_LEN - 4))
413 return -EINVAL;
414
415 urb = usb_alloc_urb(0, GFP_ATOMIC);
416 if (unlikely(!urb))
417 goto err_free;
418
419 ar->cmdbuf[0] = cpu_to_le32(plen);
420 ar->cmdbuf[0] |= cpu_to_le32(cmd << 8);
421 /* writing multiple regs fills this buffer already */
422 if (plen && payload != (u8 *)(&ar->cmdbuf[1]))
423 memcpy(&ar->cmdbuf[1], payload, plen);
424
425 spin_lock_irqsave(&aru->common.cmdlock, flags);
426 aru->readbuf = (u8 *)out;
427 aru->readlen = outlen;
428 spin_unlock_irqrestore(&aru->common.cmdlock, flags);
429
430 usb_fill_int_urb(urb, aru->udev,
431 usb_sndintpipe(aru->udev, AR9170_EP_CMD),
432 aru->common.cmdbuf, plen + 4,
433 ar9170_usb_tx_urb_complete, NULL, 1);
434
435 usb_anchor_urb(urb, &aru->tx_submitted);
436 err = usb_submit_urb(urb, GFP_ATOMIC);
437 if (unlikely(err)) {
438 usb_unanchor_urb(urb);
439 usb_free_urb(urb);
440 goto err_unbuf;
441 }
442 usb_free_urb(urb);
443
444 err = wait_for_completion_timeout(&aru->cmd_wait, HZ);
445 if (err == 0) {
446 err = -ETIMEDOUT;
447 goto err_unbuf;
448 }
449
450 if (aru->readlen != outlen) {
451 err = -EMSGSIZE;
452 goto err_unbuf;
453 }
454
455 return 0;
456
457 err_unbuf:
458 /* Maybe the device was removed in the second we were waiting? */
459 if (IS_STARTED(ar)) {
460 dev_err(&aru->udev->dev, "no command feedback "
461 "received (%d).\n", err);
462
463 /* provide some maybe useful debug information */
464 print_hex_dump_bytes("ar9170 cmd: ", DUMP_PREFIX_NONE,
465 aru->common.cmdbuf, plen + 4);
466 dump_stack();
467 }
468
469 /* invalidate to avoid completing the next prematurely */
470 spin_lock_irqsave(&aru->common.cmdlock, flags);
471 aru->readbuf = NULL;
472 aru->readlen = 0;
473 spin_unlock_irqrestore(&aru->common.cmdlock, flags);
474
475 err_free:
476
477 return err;
478 }
479
480 static int ar9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb)
481 {
482 struct ar9170_usb *aru = (struct ar9170_usb *) ar;
483 struct urb *urb;
484
485 if (unlikely(!IS_STARTED(ar))) {
486 /* Seriously, what were you drink... err... thinking!? */
487 return -EPERM;
488 }
489
490 urb = usb_alloc_urb(0, GFP_ATOMIC);
491 if (unlikely(!urb))
492 return -ENOMEM;
493
494 usb_fill_bulk_urb(urb, aru->udev,
495 usb_sndbulkpipe(aru->udev, AR9170_EP_TX),
496 skb->data, skb->len,
497 ar9170_usb_tx_urb_complete_frame, skb);
498 urb->transfer_flags |= URB_ZERO_PACKET;
499
500 usb_anchor_urb(urb, &aru->tx_pending);
501 aru->tx_pending_urbs++;
502
503 usb_free_urb(urb);
504
505 ar9170_usb_submit_urb(aru);
506 return 0;
507 }
508
509 static void ar9170_usb_callback_cmd(struct ar9170 *ar, u32 len , void *buffer)
510 {
511 struct ar9170_usb *aru = (void *) ar;
512 unsigned long flags;
513 u32 in, out;
514
515 if (unlikely(!buffer))
516 return ;
517
518 in = le32_to_cpup((__le32 *)buffer);
519 out = le32_to_cpu(ar->cmdbuf[0]);
520
521 /* mask off length byte */
522 out &= ~0xFF;
523
524 if (aru->readlen >= 0) {
525 /* add expected length */
526 out |= aru->readlen;
527 } else {
528 /* add obtained length */
529 out |= in & 0xFF;
530 }
531
532 /*
533 * Some commands (e.g: AR9170_CMD_FREQUENCY) have a variable response
534 * length and we cannot predict the correct length in advance.
535 * So we only check if we provided enough space for the data.
536 */
537 if (unlikely(out < in)) {
538 dev_warn(&aru->udev->dev, "received invalid command response "
539 "got %d bytes, instead of %d bytes "
540 "and the resp length is %d bytes\n",
541 in, out, len);
542 print_hex_dump_bytes("ar9170 invalid resp: ",
543 DUMP_PREFIX_OFFSET, buffer, len);
544 /*
545 * Do not complete, then the command times out,
546 * and we get a stack trace from there.
547 */
548 return ;
549 }
550
551 spin_lock_irqsave(&aru->common.cmdlock, flags);
552 if (aru->readbuf && len > 0) {
553 memcpy(aru->readbuf, buffer + 4, len - 4);
554 aru->readbuf = NULL;
555 }
556 complete(&aru->cmd_wait);
557 spin_unlock_irqrestore(&aru->common.cmdlock, flags);
558 }
559
560 static int ar9170_usb_upload(struct ar9170_usb *aru, const void *data,
561 size_t len, u32 addr, bool complete)
562 {
563 int transfer, err;
564 u8 *buf = kmalloc(4096, GFP_KERNEL);
565
566 if (!buf)
567 return -ENOMEM;
568
569 while (len) {
570 transfer = min_t(int, len, 4096);
571 memcpy(buf, data, transfer);
572
573 err = usb_control_msg(aru->udev, usb_sndctrlpipe(aru->udev, 0),
574 0x30 /* FW DL */, 0x40 | USB_DIR_OUT,
575 addr >> 8, 0, buf, transfer, 1000);
576
577 if (err < 0) {
578 kfree(buf);
579 return err;
580 }
581
582 len -= transfer;
583 data += transfer;
584 addr += transfer;
585 }
586 kfree(buf);
587
588 if (complete) {
589 err = usb_control_msg(aru->udev, usb_sndctrlpipe(aru->udev, 0),
590 0x31 /* FW DL COMPLETE */,
591 0x40 | USB_DIR_OUT, 0, 0, NULL, 0, 5000);
592 }
593
594 return 0;
595 }
596
597 static int ar9170_usb_reset(struct ar9170_usb *aru)
598 {
599 int ret, lock = (aru->intf->condition != USB_INTERFACE_BINDING);
600
601 if (lock) {
602 ret = usb_lock_device_for_reset(aru->udev, aru->intf);
603 if (ret < 0) {
604 dev_err(&aru->udev->dev, "unable to lock device "
605 "for reset (%d).\n", ret);
606 return ret;
607 }
608 }
609
610 ret = usb_reset_device(aru->udev);
611 if (lock)
612 usb_unlock_device(aru->udev);
613
614 /* let it rest - for a second - */
615 msleep(1000);
616
617 return ret;
618 }
619
620 static int ar9170_usb_upload_firmware(struct ar9170_usb *aru)
621 {
622 int err;
623
624 if (!aru->init_values)
625 goto upload_fw_start;
626
627 /* First, upload initial values to device RAM */
628 err = ar9170_usb_upload(aru, aru->init_values->data,
629 aru->init_values->size, 0x102800, false);
630 if (err) {
631 dev_err(&aru->udev->dev, "firmware part 1 "
632 "upload failed (%d).\n", err);
633 return err;
634 }
635
636 upload_fw_start:
637
638 /* Then, upload the firmware itself and start it */
639 return ar9170_usb_upload(aru, aru->firmware->data, aru->firmware->size,
640 0x200000, true);
641 }
642
643 static int ar9170_usb_init_transport(struct ar9170_usb *aru)
644 {
645 struct ar9170 *ar = (void *) &aru->common;
646 int err;
647
648 ar9170_regwrite_begin(ar);
649
650 /* Set USB Rx stream mode MAX packet number to 2 */
651 ar9170_regwrite(AR9170_USB_REG_MAX_AGG_UPLOAD, 0x4);
652
653 /* Set USB Rx stream mode timeout to 10us */
654 ar9170_regwrite(AR9170_USB_REG_UPLOAD_TIME_CTL, 0x80);
655
656 ar9170_regwrite_finish();
657
658 err = ar9170_regwrite_result();
659 if (err)
660 dev_err(&aru->udev->dev, "USB setup failed (%d).\n", err);
661
662 return err;
663 }
664
665 static void ar9170_usb_stop(struct ar9170 *ar)
666 {
667 struct ar9170_usb *aru = (void *) ar;
668 int ret;
669
670 if (IS_ACCEPTING_CMD(ar))
671 aru->common.state = AR9170_STOPPED;
672
673 ret = ar9170_usb_flush(ar);
674 if (ret)
675 dev_err(&aru->udev->dev, "kill pending tx urbs.\n");
676
677 usb_poison_anchored_urbs(&aru->tx_submitted);
678
679 /*
680 * Note:
681 * So far we freed all tx urbs, but we won't dare to touch any rx urbs.
682 * Else we would end up with a unresponsive device...
683 */
684 }
685
686 static int ar9170_usb_open(struct ar9170 *ar)
687 {
688 struct ar9170_usb *aru = (void *) ar;
689 int err;
690
691 usb_unpoison_anchored_urbs(&aru->tx_submitted);
692 err = ar9170_usb_init_transport(aru);
693 if (err) {
694 usb_poison_anchored_urbs(&aru->tx_submitted);
695 return err;
696 }
697
698 aru->common.state = AR9170_IDLE;
699 return 0;
700 }
701
702 static int ar9170_usb_init_device(struct ar9170_usb *aru)
703 {
704 int err;
705
706 err = ar9170_usb_alloc_rx_irq_urb(aru);
707 if (err)
708 goto err_out;
709
710 err = ar9170_usb_alloc_rx_bulk_urbs(aru);
711 if (err)
712 goto err_unrx;
713
714 err = ar9170_usb_upload_firmware(aru);
715 if (err) {
716 err = ar9170_echo_test(&aru->common, 0x60d43110);
717 if (err) {
718 /* force user invention, by disabling the device */
719 err = usb_driver_set_configuration(aru->udev, -1);
720 dev_err(&aru->udev->dev, "device is in a bad state. "
721 "please reconnect it!\n");
722 goto err_unrx;
723 }
724 }
725
726 return 0;
727
728 err_unrx:
729 ar9170_usb_cancel_urbs(aru);
730
731 err_out:
732 return err;
733 }
734
735 static void ar9170_usb_firmware_failed(struct ar9170_usb *aru)
736 {
737 struct device *parent = aru->udev->dev.parent;
738 struct usb_device *udev;
739
740 /*
741 * Store a copy of the usb_device pointer locally.
742 * This is because device_release_driver initiates
743 * ar9170_usb_disconnect, which in turn frees our
744 * driver context (aru).
745 */
746 udev = aru->udev;
747
748 complete(&aru->firmware_loading_complete);
749
750 /* unbind anything failed */
751 if (parent)
752 device_lock(parent);
753
754 device_release_driver(&udev->dev);
755 if (parent)
756 device_unlock(parent);
757
758 usb_put_dev(udev);
759 }
760
761 static void ar9170_usb_firmware_finish(const struct firmware *fw, void *context)
762 {
763 struct ar9170_usb *aru = context;
764 int err;
765
766 aru->firmware = fw;
767
768 if (!fw) {
769 dev_err(&aru->udev->dev, "firmware file not found.\n");
770 goto err_freefw;
771 }
772
773 err = ar9170_usb_init_device(aru);
774 if (err)
775 goto err_freefw;
776
777 err = ar9170_usb_open(&aru->common);
778 if (err)
779 goto err_unrx;
780
781 err = ar9170_register(&aru->common, &aru->udev->dev);
782
783 ar9170_usb_stop(&aru->common);
784 if (err)
785 goto err_unrx;
786
787 complete(&aru->firmware_loading_complete);
788 usb_put_dev(aru->udev);
789 return;
790
791 err_unrx:
792 ar9170_usb_cancel_urbs(aru);
793
794 err_freefw:
795 ar9170_usb_firmware_failed(aru);
796 }
797
798 static void ar9170_usb_firmware_inits(const struct firmware *fw,
799 void *context)
800 {
801 struct ar9170_usb *aru = context;
802 int err;
803
804 if (!fw) {
805 dev_err(&aru->udev->dev, "file with init values not found.\n");
806 ar9170_usb_firmware_failed(aru);
807 return;
808 }
809
810 aru->init_values = fw;
811
812 /* ok so we have the init values -- get code for two-stage */
813
814 err = request_firmware_nowait(THIS_MODULE, 1, "ar9170-2.fw",
815 &aru->udev->dev, GFP_KERNEL, aru,
816 ar9170_usb_firmware_finish);
817 if (err)
818 ar9170_usb_firmware_failed(aru);
819 }
820
821 static void ar9170_usb_firmware_step2(const struct firmware *fw, void *context)
822 {
823 struct ar9170_usb *aru = context;
824 int err;
825
826 if (fw) {
827 ar9170_usb_firmware_finish(fw, context);
828 return;
829 }
830
831 if (aru->req_one_stage_fw) {
832 dev_err(&aru->udev->dev, "ar9170.fw firmware file "
833 "not found and is required for this device\n");
834 ar9170_usb_firmware_failed(aru);
835 return;
836 }
837
838 dev_err(&aru->udev->dev, "ar9170.fw firmware file "
839 "not found, trying old firmware...\n");
840
841 err = request_firmware_nowait(THIS_MODULE, 1, "ar9170-1.fw",
842 &aru->udev->dev, GFP_KERNEL, aru,
843 ar9170_usb_firmware_inits);
844 if (err)
845 ar9170_usb_firmware_failed(aru);
846 }
847
848 static bool ar9170_requires_one_stage(const struct usb_device_id *id)
849 {
850 if (!id->driver_info)
851 return false;
852 if (id->driver_info == AR9170_REQ_FW1_ONLY)
853 return true;
854 return false;
855 }
856
857 static int ar9170_usb_probe(struct usb_interface *intf,
858 const struct usb_device_id *id)
859 {
860 struct ar9170_usb *aru;
861 struct ar9170 *ar;
862 struct usb_device *udev;
863 int err;
864
865 aru = ar9170_alloc(sizeof(*aru));
866 if (IS_ERR(aru)) {
867 err = PTR_ERR(aru);
868 goto out;
869 }
870
871 udev = interface_to_usbdev(intf);
872 usb_get_dev(udev);
873 aru->udev = udev;
874 aru->intf = intf;
875 ar = &aru->common;
876
877 aru->req_one_stage_fw = ar9170_requires_one_stage(id);
878
879 usb_set_intfdata(intf, aru);
880 SET_IEEE80211_DEV(ar->hw, &intf->dev);
881
882 init_usb_anchor(&aru->rx_submitted);
883 init_usb_anchor(&aru->tx_pending);
884 init_usb_anchor(&aru->tx_submitted);
885 init_completion(&aru->cmd_wait);
886 init_completion(&aru->firmware_loading_complete);
887 spin_lock_init(&aru->tx_urb_lock);
888
889 aru->tx_pending_urbs = 0;
890 atomic_set(&aru->tx_submitted_urbs, 0);
891
892 aru->common.stop = ar9170_usb_stop;
893 aru->common.flush = ar9170_usb_flush;
894 aru->common.open = ar9170_usb_open;
895 aru->common.tx = ar9170_usb_tx;
896 aru->common.exec_cmd = ar9170_usb_exec_cmd;
897 aru->common.callback_cmd = ar9170_usb_callback_cmd;
898
899 #ifdef CONFIG_PM
900 udev->reset_resume = 1;
901 #endif /* CONFIG_PM */
902 err = ar9170_usb_reset(aru);
903 if (err)
904 goto err_freehw;
905
906 usb_get_dev(aru->udev);
907 return request_firmware_nowait(THIS_MODULE, 1, "ar9170.fw",
908 &aru->udev->dev, GFP_KERNEL, aru,
909 ar9170_usb_firmware_step2);
910 err_freehw:
911 usb_set_intfdata(intf, NULL);
912 usb_put_dev(udev);
913 ieee80211_free_hw(ar->hw);
914 out:
915 return err;
916 }
917
918 static void ar9170_usb_disconnect(struct usb_interface *intf)
919 {
920 struct ar9170_usb *aru = usb_get_intfdata(intf);
921
922 if (!aru)
923 return;
924
925 aru->common.state = AR9170_IDLE;
926
927 wait_for_completion(&aru->firmware_loading_complete);
928
929 ar9170_unregister(&aru->common);
930 ar9170_usb_cancel_urbs(aru);
931
932 usb_put_dev(aru->udev);
933 usb_set_intfdata(intf, NULL);
934 ieee80211_free_hw(aru->common.hw);
935
936 release_firmware(aru->init_values);
937 release_firmware(aru->firmware);
938 }
939
940 #ifdef CONFIG_PM
941 static int ar9170_suspend(struct usb_interface *intf,
942 pm_message_t message)
943 {
944 struct ar9170_usb *aru = usb_get_intfdata(intf);
945
946 if (!aru)
947 return -ENODEV;
948
949 aru->common.state = AR9170_IDLE;
950 ar9170_usb_cancel_urbs(aru);
951
952 return 0;
953 }
954
955 static int ar9170_resume(struct usb_interface *intf)
956 {
957 struct ar9170_usb *aru = usb_get_intfdata(intf);
958 int err;
959
960 if (!aru)
961 return -ENODEV;
962
963 usb_unpoison_anchored_urbs(&aru->rx_submitted);
964 usb_unpoison_anchored_urbs(&aru->tx_submitted);
965
966 err = ar9170_usb_init_device(aru);
967 if (err)
968 goto err_unrx;
969
970 err = ar9170_usb_open(&aru->common);
971 if (err)
972 goto err_unrx;
973
974 return 0;
975
976 err_unrx:
977 aru->common.state = AR9170_IDLE;
978 ar9170_usb_cancel_urbs(aru);
979
980 return err;
981 }
982 #endif /* CONFIG_PM */
983
984 static struct usb_driver ar9170_driver = {
985 .name = "ar9170usb",
986 .probe = ar9170_usb_probe,
987 .disconnect = ar9170_usb_disconnect,
988 .id_table = ar9170_usb_ids,
989 .soft_unbind = 1,
990 #ifdef CONFIG_PM
991 .suspend = ar9170_suspend,
992 .resume = ar9170_resume,
993 .reset_resume = ar9170_resume,
994 #endif /* CONFIG_PM */
995 };
996
997 static int __init ar9170_init(void)
998 {
999 return usb_register(&ar9170_driver);
1000 }
1001
1002 static void __exit ar9170_exit(void)
1003 {
1004 usb_deregister(&ar9170_driver);
1005 }
1006
1007 module_init(ar9170_init);
1008 module_exit(ar9170_exit);
linux-next