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Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelv...
[deliverable/linux.git] / drivers / net / wireless / ath / ar9170 / usb.c
CommitLineData
b63a2cb3
CL		 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/usb.h>
42#include <linux/firmware.h>
43#include <linux/etherdevice.h>
44#include <net/mac80211.h>
45#include "ar9170.h"
46#include "cmd.h"
47#include "hw.h"
48#include "usb.h"
49
de00c04e 50MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
b63a2cb3
CL		 51MODULE_AUTHOR("Christian Lamparter <chunkeey@web.de>");
52MODULE_LICENSE("GPL");
de00c04e 53MODULE_DESCRIPTION("Atheros AR9170 802.11n USB wireless");
c768b58d 54MODULE_FIRMWARE("ar9170.fw");
b63a2cb3
CL		 55MODULE_FIRMWARE("ar9170-1.fw");
56MODULE_FIRMWARE("ar9170-2.fw");
57
bdf6d32f
LR		 58enum ar9170_requirements {
59 AR9170_REQ_FW1_ONLY = 1,
60};
61
b63a2cb3
CL		 62static struct usb_device_id ar9170_usb_ids[] = {
63 /* Atheros 9170 */
64 { USB_DEVICE(0x0cf3, 0x9170) },
65 /* Atheros TG121N */
66 { USB_DEVICE(0x0cf3, 0x1001) },
4fc298b8
CL		 67 /* Cace Airpcap NX */
68 { USB_DEVICE(0xcace, 0x0300) },
b63a2cb3
CL		 69 /* D-Link DWA 160A */
70 { USB_DEVICE(0x07d1, 0x3c10) },
71 /* Netgear WNDA3100 */
72 { USB_DEVICE(0x0846, 0x9010) },
73 /* Netgear WN111 v2 */
74 { USB_DEVICE(0x0846, 0x9001) },
75 /* Zydas ZD1221 */
76 { USB_DEVICE(0x0ace, 0x1221) },
957b0516
CL		 77 /* ZyXEL NWD271N */
78 { USB_DEVICE(0x0586, 0x3417) },
b63a2cb3
CL		 79 /* Z-Com UB81 BG */
80 { USB_DEVICE(0x0cde, 0x0023) },
81 /* Z-Com UB82 ABG */
82 { USB_DEVICE(0x0cde, 0x0026) },
83 /* Arcadyan WN7512 */
84 { USB_DEVICE(0x083a, 0xf522) },
85 /* Planex GWUS300 */
86 { USB_DEVICE(0x2019, 0x5304) },
87 /* IO-Data WNGDNUS2 */
88 { USB_DEVICE(0x04bb, 0x093f) },
bdf6d32f
LR		 89 /* AVM FRITZ!WLAN USB Stick N */
90 { USB_DEVICE(0x057C, 0x8401) },
91 /* AVM FRITZ!WLAN USB Stick N 2.4 */
92 { USB_DEVICE(0x057C, 0x8402), .driver_info = AR9170_REQ_FW1_ONLY },
b63a2cb3
CL		 93
94 /* terminate */
95 {}
96};
97MODULE_DEVICE_TABLE(usb, ar9170_usb_ids);
98
9b9c5aae
CL		 99static void ar9170_usb_submit_urb(struct ar9170_usb *aru)
100{
101 struct urb *urb;
102 unsigned long flags;
103 int err;
104
105 if (unlikely(!IS_STARTED(&aru->common)))
106 return ;
107
108 spin_lock_irqsave(&aru->tx_urb_lock, flags);
109 if (aru->tx_submitted_urbs >= AR9170_NUM_TX_URBS) {
110 spin_unlock_irqrestore(&aru->tx_urb_lock, flags);
111 return ;
112 }
113 aru->tx_submitted_urbs++;
114
115 urb = usb_get_from_anchor(&aru->tx_pending);
116 if (!urb) {
117 aru->tx_submitted_urbs--;
118 spin_unlock_irqrestore(&aru->tx_urb_lock, flags);
119
120 return ;
121 }
122 spin_unlock_irqrestore(&aru->tx_urb_lock, flags);
123
124 aru->tx_pending_urbs--;
125 usb_anchor_urb(urb, &aru->tx_submitted);
126
127 err = usb_submit_urb(urb, GFP_ATOMIC);
128 if (unlikely(err)) {
129 if (ar9170_nag_limiter(&aru->common))
130 dev_err(&aru->udev->dev, "submit_urb failed (%d).\n",
131 err);
132
133 usb_unanchor_urb(urb);
134 aru->tx_submitted_urbs--;
135 ar9170_tx_callback(&aru->common, urb->context);
136 }
137
138 usb_free_urb(urb);
139}
140
141static void ar9170_usb_tx_urb_complete_frame(struct urb *urb)
b63a2cb3
CL		 142{
143 struct sk_buff *skb = urb->context;
144 struct ar9170_usb *aru = (struct ar9170_usb *)
145 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
146
66d00813 147 if (unlikely(!aru)) {
b63a2cb3
CL		 148 dev_kfree_skb_irq(skb);
149 return ;
150 }
151
9b9c5aae
CL		 152 aru->tx_submitted_urbs--;
153
154 ar9170_tx_callback(&aru->common, skb);
155
156 ar9170_usb_submit_urb(aru);
b63a2cb3
CL		 157}
158
159static void ar9170_usb_tx_urb_complete(struct urb *urb)
160{
161}
162
163static void ar9170_usb_irq_completed(struct urb *urb)
164{
165 struct ar9170_usb *aru = urb->context;
166
167 switch (urb->status) {
168 /* everything is fine */
169 case 0:
170 break;
171
172 /* disconnect */
173 case -ENOENT:
174 case -ECONNRESET:
175 case -ENODEV:
176 case -ESHUTDOWN:
177 goto free;
178
179 default:
180 goto resubmit;
181 }
182
66d00813
CL		 183 ar9170_handle_command_response(&aru->common, urb->transfer_buffer,
184 urb->actual_length);
b63a2cb3
CL		 185
186resubmit:
187 usb_anchor_urb(urb, &aru->rx_submitted);
188 if (usb_submit_urb(urb, GFP_ATOMIC)) {
189 usb_unanchor_urb(urb);
190 goto free;
191 }
192
193 return;
194
195free:
196 usb_buffer_free(aru->udev, 64, urb->transfer_buffer, urb->transfer_dma);
197}
198
199static void ar9170_usb_rx_completed(struct urb *urb)
200{
201 struct sk_buff *skb = urb->context;
202 struct ar9170_usb *aru = (struct ar9170_usb *)
203 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
204 int err;
205
206 if (!aru)
207 goto free;
208
209 switch (urb->status) {
210 /* everything is fine */
211 case 0:
212 break;
213
214 /* disconnect */
215 case -ENOENT:
216 case -ECONNRESET:
217 case -ENODEV:
218 case -ESHUTDOWN:
219 goto free;
220
221 default:
222 goto resubmit;
223 }
224
225 skb_put(skb, urb->actual_length);
226 ar9170_rx(&aru->common, skb);
227
228resubmit:
229 skb_reset_tail_pointer(skb);
230 skb_trim(skb, 0);
231
232 usb_anchor_urb(urb, &aru->rx_submitted);
233 err = usb_submit_urb(urb, GFP_ATOMIC);
66d00813 234 if (unlikely(err)) {
b63a2cb3 235 usb_unanchor_urb(urb);
66d00813 236 goto free;
b63a2cb3
CL		 237 }
238
239 return ;
240
241free:
242 dev_kfree_skb_irq(skb);
b63a2cb3
CL		 243}
244
245static int ar9170_usb_prep_rx_urb(struct ar9170_usb *aru,
246 struct urb *urb, gfp_t gfp)
247{
248 struct sk_buff *skb;
249
250 skb = __dev_alloc_skb(AR9170_MAX_RX_BUFFER_SIZE + 32, gfp);
251 if (!skb)
252 return -ENOMEM;
253
254 /* reserve some space for mac80211's radiotap */
255 skb_reserve(skb, 32);
256
257 usb_fill_bulk_urb(urb, aru->udev,
258 usb_rcvbulkpipe(aru->udev, AR9170_EP_RX),
259 skb->data, min(skb_tailroom(skb),
260 AR9170_MAX_RX_BUFFER_SIZE),
261 ar9170_usb_rx_completed, skb);
262
263 return 0;
264}
265
266static int ar9170_usb_alloc_rx_irq_urb(struct ar9170_usb *aru)
267{
268 struct urb *urb = NULL;
269 void *ibuf;
270 int err = -ENOMEM;
271
272 /* initialize interrupt endpoint */
273 urb = usb_alloc_urb(0, GFP_KERNEL);
274 if (!urb)
275 goto out;
276
277 ibuf = usb_buffer_alloc(aru->udev, 64, GFP_KERNEL, &urb->transfer_dma);
278 if (!ibuf)
279 goto out;
280
281 usb_fill_int_urb(urb, aru->udev,
282 usb_rcvintpipe(aru->udev, AR9170_EP_IRQ), ibuf,
283 64, ar9170_usb_irq_completed, aru, 1);
284 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
285
286 usb_anchor_urb(urb, &aru->rx_submitted);
287 err = usb_submit_urb(urb, GFP_KERNEL);
288 if (err) {
289 usb_unanchor_urb(urb);
290 usb_buffer_free(aru->udev, 64, urb->transfer_buffer,
291 urb->transfer_dma);
292 }
293
294out:
295 usb_free_urb(urb);
296 return err;
297}
298
299static int ar9170_usb_alloc_rx_bulk_urbs(struct ar9170_usb *aru)
300{
301 struct urb *urb;
302 int i;
303 int err = -EINVAL;
304
305 for (i = 0; i < AR9170_NUM_RX_URBS; i++) {
306 err = -ENOMEM;
307 urb = usb_alloc_urb(0, GFP_KERNEL);
308 if (!urb)
309 goto err_out;
310
311 err = ar9170_usb_prep_rx_urb(aru, urb, GFP_KERNEL);
312 if (err) {
313 usb_free_urb(urb);
314 goto err_out;
315 }
316
317 usb_anchor_urb(urb, &aru->rx_submitted);
318 err = usb_submit_urb(urb, GFP_KERNEL);
319 if (err) {
320 usb_unanchor_urb(urb);
321 dev_kfree_skb_any((void *) urb->transfer_buffer);
322 usb_free_urb(urb);
323 goto err_out;
324 }
325 usb_free_urb(urb);
326 }
327
328 /* the device now waiting for a firmware. */
329 aru->common.state = AR9170_IDLE;
330 return 0;
331
332err_out:
333
334 usb_kill_anchored_urbs(&aru->rx_submitted);
335 return err;
336}
337
9b9c5aae 338static int ar9170_usb_flush(struct ar9170 *ar)
b63a2cb3 339{
9b9c5aae
CL		 340 struct ar9170_usb *aru = (void *) ar;
341 struct urb *urb;
342 int ret, err = 0;
b63a2cb3 343
9b9c5aae
CL		 344 if (IS_STARTED(ar))
345 aru->common.state = AR9170_IDLE;
b63a2cb3 346
9b9c5aae
CL		 347 usb_wait_anchor_empty_timeout(&aru->tx_pending,
348 msecs_to_jiffies(800));
349 while ((urb = usb_get_from_anchor(&aru->tx_pending))) {
350 ar9170_tx_callback(&aru->common, (void *) urb->context);
351 usb_free_urb(urb);
352 }
b63a2cb3 353
9b9c5aae 354 /* lets wait a while until the tx - queues are dried out */
b63a2cb3
CL		 355 ret = usb_wait_anchor_empty_timeout(&aru->tx_submitted,
356 msecs_to_jiffies(100));
357 if (ret == 0)
9b9c5aae
CL		 358 err = -ETIMEDOUT;
359
360 usb_kill_anchored_urbs(&aru->tx_submitted);
361
362 if (IS_ACCEPTING_CMD(ar))
363 aru->common.state = AR9170_STARTED;
364
365 return err;
366}
367
368static void ar9170_usb_cancel_urbs(struct ar9170_usb *aru)
369{
370 int err;
b63a2cb3 371
9b9c5aae
CL		 372 aru->common.state = AR9170_UNKNOWN_STATE;
373
374 err = ar9170_usb_flush(&aru->common);
375 if (err)
376 dev_err(&aru->udev->dev, "stuck tx urbs!\n");
377
378 usb_poison_anchored_urbs(&aru->tx_submitted);
b63a2cb3
CL		 379 usb_poison_anchored_urbs(&aru->rx_submitted);
380}
381
382static int ar9170_usb_exec_cmd(struct ar9170 *ar, enum ar9170_cmd cmd,
383 unsigned int plen, void *payload,
384 unsigned int outlen, void *out)
385{
386 struct ar9170_usb *aru = (void *) ar;
387 struct urb *urb = NULL;
388 unsigned long flags;
389 int err = -ENOMEM;
390
391 if (unlikely(!IS_ACCEPTING_CMD(ar)))
392 return -EPERM;
393
394 if (WARN_ON(plen > AR9170_MAX_CMD_LEN - 4))
395 return -EINVAL;
396
397 urb = usb_alloc_urb(0, GFP_ATOMIC);
398 if (unlikely(!urb))
399 goto err_free;
400
401 ar->cmdbuf[0] = cpu_to_le32(plen);
402 ar->cmdbuf[0] |= cpu_to_le32(cmd << 8);
403 /* writing multiple regs fills this buffer already */
404 if (plen && payload != (u8 *)(&ar->cmdbuf[1]))
405 memcpy(&ar->cmdbuf[1], payload, plen);
406
407 spin_lock_irqsave(&aru->common.cmdlock, flags);
408 aru->readbuf = (u8 *)out;
409 aru->readlen = outlen;
410 spin_unlock_irqrestore(&aru->common.cmdlock, flags);
411
412 usb_fill_int_urb(urb, aru->udev,
413 usb_sndbulkpipe(aru->udev, AR9170_EP_CMD),
414 aru->common.cmdbuf, plen + 4,
415 ar9170_usb_tx_urb_complete, NULL, 1);
416
417 usb_anchor_urb(urb, &aru->tx_submitted);
418 err = usb_submit_urb(urb, GFP_ATOMIC);
66d00813 419 if (unlikely(err)) {
b63a2cb3
CL		 420 usb_unanchor_urb(urb);
421 usb_free_urb(urb);
422 goto err_unbuf;
423 }
424 usb_free_urb(urb);
425
426 err = wait_for_completion_timeout(&aru->cmd_wait, HZ);
427 if (err == 0) {
428 err = -ETIMEDOUT;
429 goto err_unbuf;
430 }
431
ba5101d0 432 if (aru->readlen != outlen) {
b63a2cb3
CL		 433 err = -EMSGSIZE;
434 goto err_unbuf;
435 }
436
437 return 0;
438
439err_unbuf:
440 /* Maybe the device was removed in the second we were waiting? */
441 if (IS_STARTED(ar)) {
442 dev_err(&aru->udev->dev, "no command feedback "
443 "received (%d).\n", err);
444
445 /* provide some maybe useful debug information */
446 print_hex_dump_bytes("ar9170 cmd: ", DUMP_PREFIX_NONE,
447 aru->common.cmdbuf, plen + 4);
448 dump_stack();
449 }
450
451 /* invalidate to avoid completing the next prematurely */
452 spin_lock_irqsave(&aru->common.cmdlock, flags);
453 aru->readbuf = NULL;
454 aru->readlen = 0;
455 spin_unlock_irqrestore(&aru->common.cmdlock, flags);
456
457err_free:
458
459 return err;
460}
461
9b9c5aae 462static int ar9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb)
b63a2cb3
CL		 463{
464 struct ar9170_usb *aru = (struct ar9170_usb *) ar;
465 struct urb *urb;
b63a2cb3
CL		 466
467 if (unlikely(!IS_STARTED(ar))) {
468 /* Seriously, what were you drink... err... thinking!? */
469 return -EPERM;
470 }
471
472 urb = usb_alloc_urb(0, GFP_ATOMIC);
473 if (unlikely(!urb))
474 return -ENOMEM;
475
476 usb_fill_bulk_urb(urb, aru->udev,
477 usb_sndbulkpipe(aru->udev, AR9170_EP_TX),
9b9c5aae
CL		 478 skb->data, skb->len,
479 ar9170_usb_tx_urb_complete_frame, skb);
b63a2cb3
CL		 480 urb->transfer_flags |= URB_ZERO_PACKET;
481
9b9c5aae
CL		 482 usb_anchor_urb(urb, &aru->tx_pending);
483 aru->tx_pending_urbs++;
b63a2cb3
CL		 484
485 usb_free_urb(urb);
9b9c5aae
CL		 486
487 ar9170_usb_submit_urb(aru);
488 return 0;
b63a2cb3
CL		 489}
490
491static void ar9170_usb_callback_cmd(struct ar9170 *ar, u32 len , void *buffer)
492{
493 struct ar9170_usb *aru = (void *) ar;
494 unsigned long flags;
495 u32 in, out;
496
66d00813 497 if (unlikely(!buffer))
b63a2cb3
CL		 498 return ;
499
500 in = le32_to_cpup((__le32 *)buffer);
501 out = le32_to_cpu(ar->cmdbuf[0]);
502
503 /* mask off length byte */
504 out &= ~0xFF;
505
506 if (aru->readlen >= 0) {
507 /* add expected length */
508 out |= aru->readlen;
509 } else {
510 /* add obtained length */
511 out |= in & 0xFF;
512 }
513
514 /*
515 * Some commands (e.g: AR9170_CMD_FREQUENCY) have a variable response
516 * length and we cannot predict the correct length in advance.
517 * So we only check if we provided enough space for the data.
518 */
519 if (unlikely(out < in)) {
520 dev_warn(&aru->udev->dev, "received invalid command response "
521 "got %d bytes, instead of %d bytes "
522 "and the resp length is %d bytes\n",
523 in, out, len);
524 print_hex_dump_bytes("ar9170 invalid resp: ",
525 DUMP_PREFIX_OFFSET, buffer, len);
526 /*
527 * Do not complete, then the command times out,
528 * and we get a stack trace from there.
529 */
530 return ;
531 }
532
533 spin_lock_irqsave(&aru->common.cmdlock, flags);
534 if (aru->readbuf && len > 0) {
535 memcpy(aru->readbuf, buffer + 4, len - 4);
536 aru->readbuf = NULL;
537 }
538 complete(&aru->cmd_wait);
539 spin_unlock_irqrestore(&aru->common.cmdlock, flags);
540}
541
542static int ar9170_usb_upload(struct ar9170_usb *aru, const void *data,
543 size_t len, u32 addr, bool complete)
544{
545 int transfer, err;
546 u8 *buf = kmalloc(4096, GFP_KERNEL);
547
548 if (!buf)
549 return -ENOMEM;
550
551 while (len) {
552 transfer = min_t(int, len, 4096);
553 memcpy(buf, data, transfer);
554
555 err = usb_control_msg(aru->udev, usb_sndctrlpipe(aru->udev, 0),
556 0x30 /* FW DL */, 0x40 | USB_DIR_OUT,
557 addr >> 8, 0, buf, transfer, 1000);
558
559 if (err < 0) {
560 kfree(buf);
561 return err;
562 }
563
564 len -= transfer;
565 data += transfer;
566 addr += transfer;
567 }
568 kfree(buf);
569
570 if (complete) {
571 err = usb_control_msg(aru->udev, usb_sndctrlpipe(aru->udev, 0),
572 0x31 /* FW DL COMPLETE */,
573 0x40 | USB_DIR_OUT, 0, 0, NULL, 0, 5000);
574 }
575
576 return 0;
577}
578
579static int ar9170_usb_request_firmware(struct ar9170_usb *aru)
580{
581 int err = 0;
582
c768b58d 583 err = request_firmware(&aru->firmware, "ar9170.fw",
b63a2cb3 584 &aru->udev->dev);
c768b58d
LR		 585 if (!err) {
586 aru->init_values = NULL;
587 return 0;
b63a2cb3
CL		 588 }
589
bdf6d32f
LR		 590 if (aru->req_one_stage_fw) {
591 dev_err(&aru->udev->dev, "ar9170.fw firmware file "
592 "not found and is required for this device\n");
593 return -EINVAL;
594 }
595
c768b58d
LR		 596 dev_err(&aru->udev->dev, "ar9170.fw firmware file "
597 "not found, trying old firmware...\n");
598
599 err = request_firmware(&aru->init_values, "ar9170-1.fw",
600 &aru->udev->dev);
601
b63a2cb3
CL		 602 err = request_firmware(&aru->firmware, "ar9170-2.fw", &aru->udev->dev);
603 if (err) {
604 release_firmware(aru->init_values);
c768b58d 605 dev_err(&aru->udev->dev, "file with init values not found.\n");
b63a2cb3
CL		 606 return err;
607 }
608
609 return err;
610}
611
612static int ar9170_usb_reset(struct ar9170_usb *aru)
613{
614 int ret, lock = (aru->intf->condition != USB_INTERFACE_BINDING);
615
616 if (lock) {
617 ret = usb_lock_device_for_reset(aru->udev, aru->intf);
618 if (ret < 0) {
619 dev_err(&aru->udev->dev, "unable to lock device "
620 "for reset (%d).\n", ret);
621 return ret;
622 }
623 }
624
625 ret = usb_reset_device(aru->udev);
626 if (lock)
627 usb_unlock_device(aru->udev);
628
629 /* let it rest - for a second - */
630 msleep(1000);
631
632 return ret;
633}
634
635static int ar9170_usb_upload_firmware(struct ar9170_usb *aru)
636{
637 int err;
638
c768b58d
LR		 639 if (!aru->init_values)
640 goto upload_fw_start;
641
b63a2cb3
CL		 642 /* First, upload initial values to device RAM */
643 err = ar9170_usb_upload(aru, aru->init_values->data,
644 aru->init_values->size, 0x102800, false);
645 if (err) {
646 dev_err(&aru->udev->dev, "firmware part 1 "
647 "upload failed (%d).\n", err);
648 return err;
649 }
650
c768b58d
LR		 651upload_fw_start:
652
b63a2cb3
CL		 653 /* Then, upload the firmware itself and start it */
654 return ar9170_usb_upload(aru, aru->firmware->data, aru->firmware->size,
655 0x200000, true);
656}
657
658static int ar9170_usb_init_transport(struct ar9170_usb *aru)
659{
660 struct ar9170 *ar = (void *) &aru->common;
661 int err;
662
663 ar9170_regwrite_begin(ar);
664
665 /* Set USB Rx stream mode MAX packet number to 2 */
666 ar9170_regwrite(AR9170_USB_REG_MAX_AGG_UPLOAD, 0x4);
667
668 /* Set USB Rx stream mode timeout to 10us */
669 ar9170_regwrite(AR9170_USB_REG_UPLOAD_TIME_CTL, 0x80);
670
671 ar9170_regwrite_finish();
672
673 err = ar9170_regwrite_result();
674 if (err)
675 dev_err(&aru->udev->dev, "USB setup failed (%d).\n", err);
676
677 return err;
678}
679
680static void ar9170_usb_stop(struct ar9170 *ar)
681{
682 struct ar9170_usb *aru = (void *) ar;
683 int ret;
684
685 if (IS_ACCEPTING_CMD(ar))
686 aru->common.state = AR9170_STOPPED;
687
9b9c5aae
CL		 688 ret = ar9170_usb_flush(ar);
689 if (ret)
b63a2cb3
CL		 690 dev_err(&aru->udev->dev, "kill pending tx urbs.\n");
691
692 usb_poison_anchored_urbs(&aru->tx_submitted);
693
694 /*
695 * Note:
696 * So far we freed all tx urbs, but we won't dare to touch any rx urbs.
697 * Else we would end up with a unresponsive device...
698 */
699}
700
701static int ar9170_usb_open(struct ar9170 *ar)
702{
703 struct ar9170_usb *aru = (void *) ar;
704 int err;
705
706 usb_unpoison_anchored_urbs(&aru->tx_submitted);
707 err = ar9170_usb_init_transport(aru);
708 if (err) {
709 usb_poison_anchored_urbs(&aru->tx_submitted);
710 return err;
711 }
712
713 aru->common.state = AR9170_IDLE;
714 return 0;
715}
716
e10a9dfc
CL		 717static int ar9170_usb_init_device(struct ar9170_usb *aru)
718{
719 int err;
720
721 err = ar9170_usb_alloc_rx_irq_urb(aru);
722 if (err)
723 goto err_out;
724
725 err = ar9170_usb_alloc_rx_bulk_urbs(aru);
726 if (err)
727 goto err_unrx;
728
729 err = ar9170_usb_upload_firmware(aru);
730 if (err) {
731 err = ar9170_echo_test(&aru->common, 0x60d43110);
732 if (err) {
733 /* force user invention, by disabling the device */
734 err = usb_driver_set_configuration(aru->udev, -1);
735 dev_err(&aru->udev->dev, "device is in a bad state. "
736 "please reconnect it!\n");
737 goto err_unrx;
738 }
739 }
740
741 return 0;
742
743err_unrx:
744 ar9170_usb_cancel_urbs(aru);
745
746err_out:
747 return err;
748}
749
bdf6d32f
LR		 750static bool ar9170_requires_one_stage(const struct usb_device_id *id)
751{
752 if (!id->driver_info)
753 return false;
754 if (id->driver_info == AR9170_REQ_FW1_ONLY)
755 return true;
756 return false;
757}
758
b63a2cb3
CL		 759static int ar9170_usb_probe(struct usb_interface *intf,
760 const struct usb_device_id *id)
761{
762 struct ar9170_usb *aru;
763 struct ar9170 *ar;
764 struct usb_device *udev;
765 int err;
766
767 aru = ar9170_alloc(sizeof(*aru));
768 if (IS_ERR(aru)) {
769 err = PTR_ERR(aru);
770 goto out;
771 }
772
773 udev = interface_to_usbdev(intf);
774 usb_get_dev(udev);
775 aru->udev = udev;
776 aru->intf = intf;
777 ar = &aru->common;
778
bdf6d32f
LR		 779 aru->req_one_stage_fw = ar9170_requires_one_stage(id);
780
b63a2cb3
CL		 781 usb_set_intfdata(intf, aru);
782 SET_IEEE80211_DEV(ar->hw, &udev->dev);
783
784 init_usb_anchor(&aru->rx_submitted);
9b9c5aae 785 init_usb_anchor(&aru->tx_pending);
b63a2cb3
CL		 786 init_usb_anchor(&aru->tx_submitted);
787 init_completion(&aru->cmd_wait);
9b9c5aae
CL		 788 spin_lock_init(&aru->tx_urb_lock);
789
790 aru->tx_pending_urbs = 0;
791 aru->tx_submitted_urbs = 0;
b63a2cb3
CL		 792
793 aru->common.stop = ar9170_usb_stop;
9b9c5aae 794 aru->common.flush = ar9170_usb_flush;
b63a2cb3
CL		 795 aru->common.open = ar9170_usb_open;
796 aru->common.tx = ar9170_usb_tx;
797 aru->common.exec_cmd = ar9170_usb_exec_cmd;
798 aru->common.callback_cmd = ar9170_usb_callback_cmd;
799
8a713040 800#ifdef CONFIG_PM
90ccda9b 801 udev->reset_resume = 1;
66d00813 802#endif /* CONFIG_PM */
b63a2cb3
CL		 803 err = ar9170_usb_reset(aru);
804 if (err)
e10a9dfc 805 goto err_freehw;
b63a2cb3
CL		 806
807 err = ar9170_usb_request_firmware(aru);
808 if (err)
e10a9dfc 809 goto err_freehw;
b63a2cb3 810
e10a9dfc 811 err = ar9170_usb_init_device(aru);
b63a2cb3
CL		 812 if (err)
813 goto err_freefw;
814
b63a2cb3
CL		 815 err = ar9170_usb_open(ar);
816 if (err)
817 goto err_unrx;
818
819 err = ar9170_register(ar, &udev->dev);
820
821 ar9170_usb_stop(ar);
822 if (err)
823 goto err_unrx;
824
825 return 0;
826
827err_unrx:
828 ar9170_usb_cancel_urbs(aru);
829
830err_freefw:
831 release_firmware(aru->init_values);
832 release_firmware(aru->firmware);
833
e10a9dfc 834err_freehw:
b63a2cb3
CL		 835 usb_set_intfdata(intf, NULL);
836 usb_put_dev(udev);
837 ieee80211_free_hw(ar->hw);
838out:
839 return err;
840}
841
842static void ar9170_usb_disconnect(struct usb_interface *intf)
843{
844 struct ar9170_usb *aru = usb_get_intfdata(intf);
845
846 if (!aru)
847 return;
848
849 aru->common.state = AR9170_IDLE;
850 ar9170_unregister(&aru->common);
851 ar9170_usb_cancel_urbs(aru);
852
853 release_firmware(aru->init_values);
854 release_firmware(aru->firmware);
855
856 usb_put_dev(aru->udev);
857 usb_set_intfdata(intf, NULL);
858 ieee80211_free_hw(aru->common.hw);
859}
860
e10a9dfc
CL		 861#ifdef CONFIG_PM
862static int ar9170_suspend(struct usb_interface *intf,
863 pm_message_t message)
864{
865 struct ar9170_usb *aru = usb_get_intfdata(intf);
866
867 if (!aru)
868 return -ENODEV;
869
870 aru->common.state = AR9170_IDLE;
871 ar9170_usb_cancel_urbs(aru);
872
873 return 0;
874}
875
876static int ar9170_resume(struct usb_interface *intf)
877{
878 struct ar9170_usb *aru = usb_get_intfdata(intf);
879 int err;
880
881 if (!aru)
882 return -ENODEV;
883
884 usb_unpoison_anchored_urbs(&aru->rx_submitted);
885 usb_unpoison_anchored_urbs(&aru->tx_submitted);
886
e10a9dfc
CL		 887 err = ar9170_usb_init_device(aru);
888 if (err)
889 goto err_unrx;
890
891 err = ar9170_usb_open(&aru->common);
892 if (err)
893 goto err_unrx;
894
895 return 0;
896
897err_unrx:
898 aru->common.state = AR9170_IDLE;
899 ar9170_usb_cancel_urbs(aru);
900
901 return err;
902}
903#endif /* CONFIG_PM */
904
b63a2cb3
CL		 905static struct usb_driver ar9170_driver = {
906 .name = "ar9170usb",
907 .probe = ar9170_usb_probe,
908 .disconnect = ar9170_usb_disconnect,
909 .id_table = ar9170_usb_ids,
910 .soft_unbind = 1,
e10a9dfc
CL		 911#ifdef CONFIG_PM
912 .suspend = ar9170_suspend,
913 .resume = ar9170_resume,
90ccda9b 914 .reset_resume = ar9170_resume,
e10a9dfc 915#endif /* CONFIG_PM */
b63a2cb3
CL		 916};
917
918static int __init ar9170_init(void)
919{
920 return usb_register(&ar9170_driver);
921}
922
923static void __exit ar9170_exit(void)
924{
925 usb_deregister(&ar9170_driver);
926}
927
928module_init(ar9170_init);
929module_exit(ar9170_exit);
Linux kernel - Deliverables
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