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Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
[net-next-2.6.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>
5a0e3ad6 41#include <linux/slab.h>
b63a2cb3
CL		 42#include <linux/usb.h>
43#include <linux/firmware.h>
44#include <linux/etherdevice.h>
5a147e8b 45#include <linux/device.h>
b63a2cb3
CL		 46#include <net/mac80211.h>
47#include "ar9170.h"
48#include "cmd.h"
49#include "hw.h"
50#include "usb.h"
51
de00c04e 52MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
b63a2cb3
CL		 53MODULE_AUTHOR("Christian Lamparter <chunkeey@web.de>");
54MODULE_LICENSE("GPL");
de00c04e 55MODULE_DESCRIPTION("Atheros AR9170 802.11n USB wireless");
c768b58d 56MODULE_FIRMWARE("ar9170.fw");
b63a2cb3
CL		 57MODULE_FIRMWARE("ar9170-1.fw");
58MODULE_FIRMWARE("ar9170-2.fw");
59
bdf6d32f
LR		 60enum ar9170_requirements {
61 AR9170_REQ_FW1_ONLY = 1,
62};
63
b63a2cb3
CL		 64static struct usb_device_id ar9170_usb_ids[] = {
65 /* Atheros 9170 */
66 { USB_DEVICE(0x0cf3, 0x9170) },
67 /* Atheros TG121N */
68 { USB_DEVICE(0x0cf3, 0x1001) },
fe9f6342
CL		 69 /* TP-Link TL-WN821N v2 */
70 { USB_DEVICE(0x0cf3, 0x1002) },
94d0bbe8
CL		 71 /* 3Com Dual Band 802.11n USB Adapter */
72 { USB_DEVICE(0x0cf3, 0x1010) },
73 /* H3C Dual Band 802.11n USB Adapter */
74 { USB_DEVICE(0x0cf3, 0x1011) },
4fc298b8
CL		 75 /* Cace Airpcap NX */
76 { USB_DEVICE(0xcace, 0x0300) },
15295380 77 /* D-Link DWA 160 A1 */
b63a2cb3 78 { USB_DEVICE(0x07d1, 0x3c10) },
15295380
TK		 79 /* D-Link DWA 160 A2 */
80 { USB_DEVICE(0x07d1, 0x3a09) },
94d0bbe8
CL		 81 /* Netgear WNA1000 */
82 { USB_DEVICE(0x0846, 0x9040) },
b63a2cb3
CL		 83 /* Netgear WNDA3100 */
84 { USB_DEVICE(0x0846, 0x9010) },
85 /* Netgear WN111 v2 */
86 { USB_DEVICE(0x0846, 0x9001) },
87 /* Zydas ZD1221 */
88 { USB_DEVICE(0x0ace, 0x1221) },
94d0bbe8
CL		 89 /* Proxim ORiNOCO 802.11n USB */
90 { USB_DEVICE(0x1435, 0x0804) },
91 /* WNC Generic 11n USB Dongle */
92 { USB_DEVICE(0x1435, 0x0326) },
957b0516
CL		 93 /* ZyXEL NWD271N */
94 { USB_DEVICE(0x0586, 0x3417) },
b63a2cb3
CL		 95 /* Z-Com UB81 BG */
96 { USB_DEVICE(0x0cde, 0x0023) },
97 /* Z-Com UB82 ABG */
98 { USB_DEVICE(0x0cde, 0x0026) },
5b6e2f12
SS		 99 /* Sphairon Homelink 1202 */
100 { USB_DEVICE(0x0cde, 0x0027) },
b63a2cb3
CL		 101 /* Arcadyan WN7512 */
102 { USB_DEVICE(0x083a, 0xf522) },
103 /* Planex GWUS300 */
104 { USB_DEVICE(0x2019, 0x5304) },
105 /* IO-Data WNGDNUS2 */
106 { USB_DEVICE(0x04bb, 0x093f) },
bdf6d32f
LR		 107 /* AVM FRITZ!WLAN USB Stick N */
108 { USB_DEVICE(0x057C, 0x8401) },
eb3d72c8
BK		 109 /* NEC WL300NU-G */
110 { USB_DEVICE(0x0409, 0x0249) },
bdf6d32f
LR		 111 /* AVM FRITZ!WLAN USB Stick N 2.4 */
112 { USB_DEVICE(0x057C, 0x8402), .driver_info = AR9170_REQ_FW1_ONLY },
2cb1ba15
ST		 113 /* Qwest/Actiontec 802AIN Wireless N USB Network Adapter */
114 { USB_DEVICE(0x1668, 0x1200) },
b63a2cb3
CL		 115
116 /* terminate */
117 {}
118};
119MODULE_DEVICE_TABLE(usb, ar9170_usb_ids);
120
9b9c5aae
CL		 121static void ar9170_usb_submit_urb(struct ar9170_usb *aru)
122{
123 struct urb *urb;
124 unsigned long flags;
125 int err;
126
127 if (unlikely(!IS_STARTED(&aru->common)))
128 return ;
129
130 spin_lock_irqsave(&aru->tx_urb_lock, flags);
731d6bfc 131 if (atomic_read(&aru->tx_submitted_urbs) >= AR9170_NUM_TX_URBS) {
9b9c5aae
CL		 132 spin_unlock_irqrestore(&aru->tx_urb_lock, flags);
133 return ;
134 }
731d6bfc 135 atomic_inc(&aru->tx_submitted_urbs);
9b9c5aae
CL		 136
137 urb = usb_get_from_anchor(&aru->tx_pending);
138 if (!urb) {
731d6bfc 139 atomic_dec(&aru->tx_submitted_urbs);
9b9c5aae
CL		 140 spin_unlock_irqrestore(&aru->tx_urb_lock, flags);
141
142 return ;
143 }
144 spin_unlock_irqrestore(&aru->tx_urb_lock, flags);
145
146 aru->tx_pending_urbs--;
147 usb_anchor_urb(urb, &aru->tx_submitted);
148
149 err = usb_submit_urb(urb, GFP_ATOMIC);
150 if (unlikely(err)) {
151 if (ar9170_nag_limiter(&aru->common))
152 dev_err(&aru->udev->dev, "submit_urb failed (%d).\n",
153 err);
154
155 usb_unanchor_urb(urb);
731d6bfc 156 atomic_dec(&aru->tx_submitted_urbs);
9b9c5aae
CL		 157 ar9170_tx_callback(&aru->common, urb->context);
158 }
159
160 usb_free_urb(urb);
161}
162
163static void ar9170_usb_tx_urb_complete_frame(struct urb *urb)
b63a2cb3
CL		 164{
165 struct sk_buff *skb = urb->context;
166 struct ar9170_usb *aru = (struct ar9170_usb *)
167 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
168
66d00813 169 if (unlikely(!aru)) {
b63a2cb3
CL		 170 dev_kfree_skb_irq(skb);
171 return ;
172 }
173
731d6bfc 174 atomic_dec(&aru->tx_submitted_urbs);
9b9c5aae
CL		 175
176 ar9170_tx_callback(&aru->common, skb);
177
178 ar9170_usb_submit_urb(aru);
b63a2cb3
CL		 179}
180
181static void ar9170_usb_tx_urb_complete(struct urb *urb)
182{
183}
184
185static void ar9170_usb_irq_completed(struct urb *urb)
186{
187 struct ar9170_usb *aru = urb->context;
188
189 switch (urb->status) {
190 /* everything is fine */
191 case 0:
192 break;
193
194 /* disconnect */
195 case -ENOENT:
196 case -ECONNRESET:
197 case -ENODEV:
198 case -ESHUTDOWN:
199 goto free;
200
201 default:
202 goto resubmit;
203 }
204
66d00813
CL		 205 ar9170_handle_command_response(&aru->common, urb->transfer_buffer,
206 urb->actual_length);
b63a2cb3
CL		 207
208resubmit:
209 usb_anchor_urb(urb, &aru->rx_submitted);
210 if (usb_submit_urb(urb, GFP_ATOMIC)) {
211 usb_unanchor_urb(urb);
212 goto free;
213 }
214
215 return;
216
217free:
997ea58e 218 usb_free_coherent(aru->udev, 64, urb->transfer_buffer, urb->transfer_dma);
b63a2cb3
CL		 219}
220
221static void ar9170_usb_rx_completed(struct urb *urb)
222{
223 struct sk_buff *skb = urb->context;
224 struct ar9170_usb *aru = (struct ar9170_usb *)
225 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
226 int err;
227
228 if (!aru)
229 goto free;
230
231 switch (urb->status) {
232 /* everything is fine */
233 case 0:
234 break;
235
236 /* disconnect */
237 case -ENOENT:
238 case -ECONNRESET:
239 case -ENODEV:
240 case -ESHUTDOWN:
241 goto free;
242
243 default:
244 goto resubmit;
245 }
246
247 skb_put(skb, urb->actual_length);
248 ar9170_rx(&aru->common, skb);
249
250resubmit:
251 skb_reset_tail_pointer(skb);
252 skb_trim(skb, 0);
253
254 usb_anchor_urb(urb, &aru->rx_submitted);
255 err = usb_submit_urb(urb, GFP_ATOMIC);
66d00813 256 if (unlikely(err)) {
b63a2cb3 257 usb_unanchor_urb(urb);
66d00813 258 goto free;
b63a2cb3
CL		 259 }
260
261 return ;
262
263free:
264 dev_kfree_skb_irq(skb);
b63a2cb3
CL		 265}
266
267static int ar9170_usb_prep_rx_urb(struct ar9170_usb *aru,
268 struct urb *urb, gfp_t gfp)
269{
270 struct sk_buff *skb;
271
272 skb = __dev_alloc_skb(AR9170_MAX_RX_BUFFER_SIZE + 32, gfp);
273 if (!skb)
274 return -ENOMEM;
275
276 /* reserve some space for mac80211's radiotap */
277 skb_reserve(skb, 32);
278
279 usb_fill_bulk_urb(urb, aru->udev,
280 usb_rcvbulkpipe(aru->udev, AR9170_EP_RX),
281 skb->data, min(skb_tailroom(skb),
282 AR9170_MAX_RX_BUFFER_SIZE),
283 ar9170_usb_rx_completed, skb);
284
285 return 0;
286}
287
288static int ar9170_usb_alloc_rx_irq_urb(struct ar9170_usb *aru)
289{
290 struct urb *urb = NULL;
291 void *ibuf;
292 int err = -ENOMEM;
293
294 /* initialize interrupt endpoint */
295 urb = usb_alloc_urb(0, GFP_KERNEL);
296 if (!urb)
297 goto out;
298
997ea58e 299 ibuf = usb_alloc_coherent(aru->udev, 64, GFP_KERNEL, &urb->transfer_dma);
b63a2cb3
CL		 300 if (!ibuf)
301 goto out;
302
303 usb_fill_int_urb(urb, aru->udev,
304 usb_rcvintpipe(aru->udev, AR9170_EP_IRQ), ibuf,
305 64, ar9170_usb_irq_completed, aru, 1);
306 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
307
308 usb_anchor_urb(urb, &aru->rx_submitted);
309 err = usb_submit_urb(urb, GFP_KERNEL);
310 if (err) {
311 usb_unanchor_urb(urb);
997ea58e
DM		 312 usb_free_coherent(aru->udev, 64, urb->transfer_buffer,
313 urb->transfer_dma);
b63a2cb3
CL		 314 }
315
316out:
317 usb_free_urb(urb);
318 return err;
319}
320
321static int ar9170_usb_alloc_rx_bulk_urbs(struct ar9170_usb *aru)
322{
323 struct urb *urb;
324 int i;
325 int err = -EINVAL;
326
327 for (i = 0; i < AR9170_NUM_RX_URBS; i++) {
328 err = -ENOMEM;
329 urb = usb_alloc_urb(0, GFP_KERNEL);
330 if (!urb)
331 goto err_out;
332
333 err = ar9170_usb_prep_rx_urb(aru, urb, GFP_KERNEL);
334 if (err) {
335 usb_free_urb(urb);
336 goto err_out;
337 }
338
339 usb_anchor_urb(urb, &aru->rx_submitted);
340 err = usb_submit_urb(urb, GFP_KERNEL);
341 if (err) {
342 usb_unanchor_urb(urb);
343 dev_kfree_skb_any((void *) urb->transfer_buffer);
344 usb_free_urb(urb);
345 goto err_out;
346 }
347 usb_free_urb(urb);
348 }
349
350 /* the device now waiting for a firmware. */
351 aru->common.state = AR9170_IDLE;
352 return 0;
353
354err_out:
355
356 usb_kill_anchored_urbs(&aru->rx_submitted);
357 return err;
358}
359
9b9c5aae 360static int ar9170_usb_flush(struct ar9170 *ar)
b63a2cb3 361{
9b9c5aae
CL		 362 struct ar9170_usb *aru = (void *) ar;
363 struct urb *urb;
364 int ret, err = 0;
b63a2cb3 365
9b9c5aae
CL		 366 if (IS_STARTED(ar))
367 aru->common.state = AR9170_IDLE;
b63a2cb3 368
9b9c5aae
CL		 369 usb_wait_anchor_empty_timeout(&aru->tx_pending,
370 msecs_to_jiffies(800));
371 while ((urb = usb_get_from_anchor(&aru->tx_pending))) {
372 ar9170_tx_callback(&aru->common, (void *) urb->context);
373 usb_free_urb(urb);
374 }
b63a2cb3 375
9b9c5aae 376 /* lets wait a while until the tx - queues are dried out */
b63a2cb3
CL		 377 ret = usb_wait_anchor_empty_timeout(&aru->tx_submitted,
378 msecs_to_jiffies(100));
379 if (ret == 0)
9b9c5aae
CL		 380 err = -ETIMEDOUT;
381
382 usb_kill_anchored_urbs(&aru->tx_submitted);
383
384 if (IS_ACCEPTING_CMD(ar))
385 aru->common.state = AR9170_STARTED;
386
387 return err;
388}
389
390static void ar9170_usb_cancel_urbs(struct ar9170_usb *aru)
391{
392 int err;
b63a2cb3 393
9b9c5aae
CL		 394 aru->common.state = AR9170_UNKNOWN_STATE;
395
396 err = ar9170_usb_flush(&aru->common);
397 if (err)
398 dev_err(&aru->udev->dev, "stuck tx urbs!\n");
399
400 usb_poison_anchored_urbs(&aru->tx_submitted);
b63a2cb3
CL		 401 usb_poison_anchored_urbs(&aru->rx_submitted);
402}
403
404static int ar9170_usb_exec_cmd(struct ar9170 *ar, enum ar9170_cmd cmd,
405 unsigned int plen, void *payload,
406 unsigned int outlen, void *out)
407{
408 struct ar9170_usb *aru = (void *) ar;
409 struct urb *urb = NULL;
410 unsigned long flags;
411 int err = -ENOMEM;
412
413 if (unlikely(!IS_ACCEPTING_CMD(ar)))
414 return -EPERM;
415
416 if (WARN_ON(plen > AR9170_MAX_CMD_LEN - 4))
417 return -EINVAL;
418
419 urb = usb_alloc_urb(0, GFP_ATOMIC);
420 if (unlikely(!urb))
421 goto err_free;
422
423 ar->cmdbuf[0] = cpu_to_le32(plen);
424 ar->cmdbuf[0] |= cpu_to_le32(cmd << 8);
425 /* writing multiple regs fills this buffer already */
426 if (plen && payload != (u8 *)(&ar->cmdbuf[1]))
427 memcpy(&ar->cmdbuf[1], payload, plen);
428
429 spin_lock_irqsave(&aru->common.cmdlock, flags);
430 aru->readbuf = (u8 *)out;
431 aru->readlen = outlen;
432 spin_unlock_irqrestore(&aru->common.cmdlock, flags);
433
434 usb_fill_int_urb(urb, aru->udev,
2d20c72c 435 usb_sndintpipe(aru->udev, AR9170_EP_CMD),
b63a2cb3
CL		 436 aru->common.cmdbuf, plen + 4,
437 ar9170_usb_tx_urb_complete, NULL, 1);
438
439 usb_anchor_urb(urb, &aru->tx_submitted);
440 err = usb_submit_urb(urb, GFP_ATOMIC);
66d00813 441 if (unlikely(err)) {
b63a2cb3
CL		 442 usb_unanchor_urb(urb);
443 usb_free_urb(urb);
444 goto err_unbuf;
445 }
446 usb_free_urb(urb);
447
448 err = wait_for_completion_timeout(&aru->cmd_wait, HZ);
449 if (err == 0) {
450 err = -ETIMEDOUT;
451 goto err_unbuf;
452 }
453
ba5101d0 454 if (aru->readlen != outlen) {
b63a2cb3
CL		 455 err = -EMSGSIZE;
456 goto err_unbuf;
457 }
458
459 return 0;
460
461err_unbuf:
462 /* Maybe the device was removed in the second we were waiting? */
463 if (IS_STARTED(ar)) {
464 dev_err(&aru->udev->dev, "no command feedback "
465 "received (%d).\n", err);
466
467 /* provide some maybe useful debug information */
468 print_hex_dump_bytes("ar9170 cmd: ", DUMP_PREFIX_NONE,
469 aru->common.cmdbuf, plen + 4);
470 dump_stack();
471 }
472
473 /* invalidate to avoid completing the next prematurely */
474 spin_lock_irqsave(&aru->common.cmdlock, flags);
475 aru->readbuf = NULL;
476 aru->readlen = 0;
477 spin_unlock_irqrestore(&aru->common.cmdlock, flags);
478
479err_free:
480
481 return err;
482}
483
9b9c5aae 484static int ar9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb)
b63a2cb3
CL		 485{
486 struct ar9170_usb *aru = (struct ar9170_usb *) ar;
487 struct urb *urb;
b63a2cb3
CL		 488
489 if (unlikely(!IS_STARTED(ar))) {
490 /* Seriously, what were you drink... err... thinking!? */
491 return -EPERM;
492 }
493
494 urb = usb_alloc_urb(0, GFP_ATOMIC);
495 if (unlikely(!urb))
496 return -ENOMEM;
497
498 usb_fill_bulk_urb(urb, aru->udev,
499 usb_sndbulkpipe(aru->udev, AR9170_EP_TX),
9b9c5aae
CL		 500 skb->data, skb->len,
501 ar9170_usb_tx_urb_complete_frame, skb);
b63a2cb3
CL		 502 urb->transfer_flags |= URB_ZERO_PACKET;
503
9b9c5aae
CL		 504 usb_anchor_urb(urb, &aru->tx_pending);
505 aru->tx_pending_urbs++;
b63a2cb3
CL		 506
507 usb_free_urb(urb);
9b9c5aae
CL		 508
509 ar9170_usb_submit_urb(aru);
510 return 0;
b63a2cb3
CL		 511}
512
513static void ar9170_usb_callback_cmd(struct ar9170 *ar, u32 len , void *buffer)
514{
515 struct ar9170_usb *aru = (void *) ar;
516 unsigned long flags;
517 u32 in, out;
518
66d00813 519 if (unlikely(!buffer))
b63a2cb3
CL		 520 return ;
521
522 in = le32_to_cpup((__le32 *)buffer);
523 out = le32_to_cpu(ar->cmdbuf[0]);
524
525 /* mask off length byte */
526 out &= ~0xFF;
527
528 if (aru->readlen >= 0) {
529 /* add expected length */
530 out |= aru->readlen;
531 } else {
532 /* add obtained length */
533 out |= in & 0xFF;
534 }
535
536 /*
537 * Some commands (e.g: AR9170_CMD_FREQUENCY) have a variable response
538 * length and we cannot predict the correct length in advance.
539 * So we only check if we provided enough space for the data.
540 */
541 if (unlikely(out < in)) {
542 dev_warn(&aru->udev->dev, "received invalid command response "
543 "got %d bytes, instead of %d bytes "
544 "and the resp length is %d bytes\n",
545 in, out, len);
546 print_hex_dump_bytes("ar9170 invalid resp: ",
547 DUMP_PREFIX_OFFSET, buffer, len);
548 /*
549 * Do not complete, then the command times out,
550 * and we get a stack trace from there.
551 */
552 return ;
553 }
554
555 spin_lock_irqsave(&aru->common.cmdlock, flags);
556 if (aru->readbuf && len > 0) {
557 memcpy(aru->readbuf, buffer + 4, len - 4);
558 aru->readbuf = NULL;
559 }
560 complete(&aru->cmd_wait);
561 spin_unlock_irqrestore(&aru->common.cmdlock, flags);
562}
563
564static int ar9170_usb_upload(struct ar9170_usb *aru, const void *data,
565 size_t len, u32 addr, bool complete)
566{
567 int transfer, err;
568 u8 *buf = kmalloc(4096, GFP_KERNEL);
569
570 if (!buf)
571 return -ENOMEM;
572
573 while (len) {
574 transfer = min_t(int, len, 4096);
575 memcpy(buf, data, transfer);
576
577 err = usb_control_msg(aru->udev, usb_sndctrlpipe(aru->udev, 0),
578 0x30 /* FW DL */, 0x40 | USB_DIR_OUT,
579 addr >> 8, 0, buf, transfer, 1000);
580
581 if (err < 0) {
582 kfree(buf);
583 return err;
584 }
585
586 len -= transfer;
587 data += transfer;
588 addr += transfer;
589 }
590 kfree(buf);
591
592 if (complete) {
593 err = usb_control_msg(aru->udev, usb_sndctrlpipe(aru->udev, 0),
594 0x31 /* FW DL COMPLETE */,
595 0x40 | USB_DIR_OUT, 0, 0, NULL, 0, 5000);
596 }
597
598 return 0;
599}
600
b63a2cb3
CL		 601static int ar9170_usb_reset(struct ar9170_usb *aru)
602{
603 int ret, lock = (aru->intf->condition != USB_INTERFACE_BINDING);
604
605 if (lock) {
606 ret = usb_lock_device_for_reset(aru->udev, aru->intf);
607 if (ret < 0) {
608 dev_err(&aru->udev->dev, "unable to lock device "
609 "for reset (%d).\n", ret);
610 return ret;
611 }
612 }
613
614 ret = usb_reset_device(aru->udev);
615 if (lock)
616 usb_unlock_device(aru->udev);
617
618 /* let it rest - for a second - */
619 msleep(1000);
620
621 return ret;
622}
623
624static int ar9170_usb_upload_firmware(struct ar9170_usb *aru)
625{
626 int err;
627
c768b58d
LR		 628 if (!aru->init_values)
629 goto upload_fw_start;
630
b63a2cb3
CL		 631 /* First, upload initial values to device RAM */
632 err = ar9170_usb_upload(aru, aru->init_values->data,
633 aru->init_values->size, 0x102800, false);
634 if (err) {
635 dev_err(&aru->udev->dev, "firmware part 1 "
636 "upload failed (%d).\n", err);
637 return err;
638 }
639
c768b58d
LR		 640upload_fw_start:
641
b63a2cb3
CL		 642 /* Then, upload the firmware itself and start it */
643 return ar9170_usb_upload(aru, aru->firmware->data, aru->firmware->size,
644 0x200000, true);
645}
646
647static int ar9170_usb_init_transport(struct ar9170_usb *aru)
648{
649 struct ar9170 *ar = (void *) &aru->common;
650 int err;
651
652 ar9170_regwrite_begin(ar);
653
654 /* Set USB Rx stream mode MAX packet number to 2 */
655 ar9170_regwrite(AR9170_USB_REG_MAX_AGG_UPLOAD, 0x4);
656
657 /* Set USB Rx stream mode timeout to 10us */
658 ar9170_regwrite(AR9170_USB_REG_UPLOAD_TIME_CTL, 0x80);
659
660 ar9170_regwrite_finish();
661
662 err = ar9170_regwrite_result();
663 if (err)
664 dev_err(&aru->udev->dev, "USB setup failed (%d).\n", err);
665
666 return err;
667}
668
669static void ar9170_usb_stop(struct ar9170 *ar)
670{
671 struct ar9170_usb *aru = (void *) ar;
672 int ret;
673
674 if (IS_ACCEPTING_CMD(ar))
675 aru->common.state = AR9170_STOPPED;
676
9b9c5aae
CL		 677 ret = ar9170_usb_flush(ar);
678 if (ret)
b63a2cb3
CL		 679 dev_err(&aru->udev->dev, "kill pending tx urbs.\n");
680
681 usb_poison_anchored_urbs(&aru->tx_submitted);
682
683 /*
684 * Note:
685 * So far we freed all tx urbs, but we won't dare to touch any rx urbs.
686 * Else we would end up with a unresponsive device...
687 */
688}
689
690static int ar9170_usb_open(struct ar9170 *ar)
691{
692 struct ar9170_usb *aru = (void *) ar;
693 int err;
694
695 usb_unpoison_anchored_urbs(&aru->tx_submitted);
696 err = ar9170_usb_init_transport(aru);
697 if (err) {
698 usb_poison_anchored_urbs(&aru->tx_submitted);
699 return err;
700 }
701
702 aru->common.state = AR9170_IDLE;
703 return 0;
704}
705
e10a9dfc
CL		 706static int ar9170_usb_init_device(struct ar9170_usb *aru)
707{
708 int err;
709
710 err = ar9170_usb_alloc_rx_irq_urb(aru);
711 if (err)
712 goto err_out;
713
714 err = ar9170_usb_alloc_rx_bulk_urbs(aru);
715 if (err)
716 goto err_unrx;
717
718 err = ar9170_usb_upload_firmware(aru);
719 if (err) {
720 err = ar9170_echo_test(&aru->common, 0x60d43110);
721 if (err) {
722 /* force user invention, by disabling the device */
723 err = usb_driver_set_configuration(aru->udev, -1);
724 dev_err(&aru->udev->dev, "device is in a bad state. "
725 "please reconnect it!\n");
726 goto err_unrx;
727 }
728 }
729
730 return 0;
731
732err_unrx:
733 ar9170_usb_cancel_urbs(aru);
734
735err_out:
736 return err;
737}
738
53576517
JB		 739static void ar9170_usb_firmware_failed(struct ar9170_usb *aru)
740{
741 struct device *parent = aru->udev->dev.parent;
50019600
CL		 742 struct usb_device *udev;
743
744 /*
745 * Store a copy of the usb_device pointer locally.
746 * This is because device_release_driver initiates
747 * ar9170_usb_disconnect, which in turn frees our
748 * driver context (aru).
749 */
750 udev = aru->udev;
53576517 751
160b8242
CL		 752 complete(&aru->firmware_loading_complete);
753
53576517
JB		 754 /* unbind anything failed */
755 if (parent)
5a147e8b 756 device_lock(parent);
50019600
CL		 757
758 device_release_driver(&udev->dev);
53576517 759 if (parent)
5a147e8b 760 device_unlock(parent);
160b8242 761
50019600 762 usb_put_dev(udev);
53576517
JB		 763}
764
765static void ar9170_usb_firmware_finish(const struct firmware *fw, void *context)
766{
767 struct ar9170_usb *aru = context;
768 int err;
769
770 aru->firmware = fw;
771
772 if (!fw) {
773 dev_err(&aru->udev->dev, "firmware file not found.\n");
774 goto err_freefw;
775 }
776
777 err = ar9170_usb_init_device(aru);
778 if (err)
779 goto err_freefw;
780
781 err = ar9170_usb_open(&aru->common);
782 if (err)
783 goto err_unrx;
784
785 err = ar9170_register(&aru->common, &aru->udev->dev);
786
787 ar9170_usb_stop(&aru->common);
788 if (err)
789 goto err_unrx;
790
160b8242
CL		 791 complete(&aru->firmware_loading_complete);
792 usb_put_dev(aru->udev);
53576517
JB		 793 return;
794
795 err_unrx:
796 ar9170_usb_cancel_urbs(aru);
797
798 err_freefw:
799 ar9170_usb_firmware_failed(aru);
800}
801
802static void ar9170_usb_firmware_inits(const struct firmware *fw,
803 void *context)
804{
805 struct ar9170_usb *aru = context;
806 int err;
807
808 if (!fw) {
809 dev_err(&aru->udev->dev, "file with init values not found.\n");
810 ar9170_usb_firmware_failed(aru);
811 return;
812 }
813
814 aru->init_values = fw;
815
816 /* ok so we have the init values -- get code for two-stage */
817
818 err = request_firmware_nowait(THIS_MODULE, 1, "ar9170-2.fw",
819 &aru->udev->dev, GFP_KERNEL, aru,
820 ar9170_usb_firmware_finish);
821 if (err)
822 ar9170_usb_firmware_failed(aru);
823}
824
825static void ar9170_usb_firmware_step2(const struct firmware *fw, void *context)
826{
827 struct ar9170_usb *aru = context;
828 int err;
829
830 if (fw) {
831 ar9170_usb_firmware_finish(fw, context);
832 return;
833 }
834
835 if (aru->req_one_stage_fw) {
836 dev_err(&aru->udev->dev, "ar9170.fw firmware file "
837 "not found and is required for this device\n");
838 ar9170_usb_firmware_failed(aru);
839 return;
840 }
841
842 dev_err(&aru->udev->dev, "ar9170.fw firmware file "
843 "not found, trying old firmware...\n");
844
845 err = request_firmware_nowait(THIS_MODULE, 1, "ar9170-1.fw",
846 &aru->udev->dev, GFP_KERNEL, aru,
847 ar9170_usb_firmware_inits);
848 if (err)
849 ar9170_usb_firmware_failed(aru);
850}
851
bdf6d32f
LR		 852static bool ar9170_requires_one_stage(const struct usb_device_id *id)
853{
854 if (!id->driver_info)
855 return false;
856 if (id->driver_info == AR9170_REQ_FW1_ONLY)
857 return true;
858 return false;
859}
860
b63a2cb3
CL		 861static int ar9170_usb_probe(struct usb_interface *intf,
862 const struct usb_device_id *id)
863{
864 struct ar9170_usb *aru;
865 struct ar9170 *ar;
866 struct usb_device *udev;
867 int err;
868
869 aru = ar9170_alloc(sizeof(*aru));
870 if (IS_ERR(aru)) {
871 err = PTR_ERR(aru);
872 goto out;
873 }
874
875 udev = interface_to_usbdev(intf);
876 usb_get_dev(udev);
877 aru->udev = udev;
878 aru->intf = intf;
879 ar = &aru->common;
880
bdf6d32f
LR		 881 aru->req_one_stage_fw = ar9170_requires_one_stage(id);
882
b63a2cb3 883 usb_set_intfdata(intf, aru);
92179986 884 SET_IEEE80211_DEV(ar->hw, &intf->dev);
b63a2cb3
CL		 885
886 init_usb_anchor(&aru->rx_submitted);
9b9c5aae 887 init_usb_anchor(&aru->tx_pending);
b63a2cb3
CL		 888 init_usb_anchor(&aru->tx_submitted);
889 init_completion(&aru->cmd_wait);
160b8242 890 init_completion(&aru->firmware_loading_complete);
9b9c5aae
CL		 891 spin_lock_init(&aru->tx_urb_lock);
892
893 aru->tx_pending_urbs = 0;
731d6bfc 894 atomic_set(&aru->tx_submitted_urbs, 0);
b63a2cb3
CL		 895
896 aru->common.stop = ar9170_usb_stop;
9b9c5aae 897 aru->common.flush = ar9170_usb_flush;
b63a2cb3
CL		 898 aru->common.open = ar9170_usb_open;
899 aru->common.tx = ar9170_usb_tx;
900 aru->common.exec_cmd = ar9170_usb_exec_cmd;
901 aru->common.callback_cmd = ar9170_usb_callback_cmd;
902
8a713040 903#ifdef CONFIG_PM
90ccda9b 904 udev->reset_resume = 1;
66d00813 905#endif /* CONFIG_PM */
b63a2cb3
CL		 906 err = ar9170_usb_reset(aru);
907 if (err)
e10a9dfc 908 goto err_freehw;
b63a2cb3 909
160b8242 910 usb_get_dev(aru->udev);
53576517
JB		 911 return request_firmware_nowait(THIS_MODULE, 1, "ar9170.fw",
912 &aru->udev->dev, GFP_KERNEL, aru,
913 ar9170_usb_firmware_step2);
e10a9dfc 914err_freehw:
b63a2cb3
CL		 915 usb_set_intfdata(intf, NULL);
916 usb_put_dev(udev);
917 ieee80211_free_hw(ar->hw);
918out:
919 return err;
920}
921
922static void ar9170_usb_disconnect(struct usb_interface *intf)
923{
924 struct ar9170_usb *aru = usb_get_intfdata(intf);
925
926 if (!aru)
927 return;
928
929 aru->common.state = AR9170_IDLE;
160b8242
CL		 930
931 wait_for_completion(&aru->firmware_loading_complete);
932
b63a2cb3
CL		 933 ar9170_unregister(&aru->common);
934 ar9170_usb_cancel_urbs(aru);
935
b63a2cb3
CL		 936 usb_put_dev(aru->udev);
937 usb_set_intfdata(intf, NULL);
938 ieee80211_free_hw(aru->common.hw);
53576517
JB		 939
940 release_firmware(aru->init_values);
941 release_firmware(aru->firmware);
b63a2cb3
CL		 942}
943
e10a9dfc
CL		 944#ifdef CONFIG_PM
945static int ar9170_suspend(struct usb_interface *intf,
946 pm_message_t message)
947{
948 struct ar9170_usb *aru = usb_get_intfdata(intf);
949
950 if (!aru)
951 return -ENODEV;
952
953 aru->common.state = AR9170_IDLE;
954 ar9170_usb_cancel_urbs(aru);
955
956 return 0;
957}
958
959static int ar9170_resume(struct usb_interface *intf)
960{
961 struct ar9170_usb *aru = usb_get_intfdata(intf);
962 int err;
963
964 if (!aru)
965 return -ENODEV;
966
967 usb_unpoison_anchored_urbs(&aru->rx_submitted);
968 usb_unpoison_anchored_urbs(&aru->tx_submitted);
969
e10a9dfc
CL		 970 err = ar9170_usb_init_device(aru);
971 if (err)
972 goto err_unrx;
973
974 err = ar9170_usb_open(&aru->common);
975 if (err)
976 goto err_unrx;
977
978 return 0;
979
980err_unrx:
981 aru->common.state = AR9170_IDLE;
982 ar9170_usb_cancel_urbs(aru);
983
984 return err;
985}
986#endif /* CONFIG_PM */
987
b63a2cb3
CL		 988static struct usb_driver ar9170_driver = {
989 .name = "ar9170usb",
990 .probe = ar9170_usb_probe,
991 .disconnect = ar9170_usb_disconnect,
992 .id_table = ar9170_usb_ids,
993 .soft_unbind = 1,
e10a9dfc
CL		 994#ifdef CONFIG_PM
995 .suspend = ar9170_suspend,
996 .resume = ar9170_resume,
90ccda9b 997 .reset_resume = ar9170_resume,
e10a9dfc 998#endif /* CONFIG_PM */
b63a2cb3
CL		 999};
1000
1001static int __init ar9170_init(void)
1002{
1003 return usb_register(&ar9170_driver);
1004}
1005
1006static void __exit ar9170_exit(void)
1007{
1008 usb_deregister(&ar9170_driver);
1009}
1010
1011module_init(ar9170_init);
1012module_exit(ar9170_exit);
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