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ar9170usb: add usbid for TP-Link TL-WN821N v2
[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>
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) },
fe9f6342
CL		 67 /* TP-Link TL-WN821N v2 */
68 { USB_DEVICE(0x0cf3, 0x1002) },
4fc298b8
CL		 69 /* Cace Airpcap NX */
70 { USB_DEVICE(0xcace, 0x0300) },
b63a2cb3
CL		 71 /* D-Link DWA 160A */
72 { USB_DEVICE(0x07d1, 0x3c10) },
73 /* Netgear WNDA3100 */
74 { USB_DEVICE(0x0846, 0x9010) },
75 /* Netgear WN111 v2 */
76 { USB_DEVICE(0x0846, 0x9001) },
77 /* Zydas ZD1221 */
78 { USB_DEVICE(0x0ace, 0x1221) },
957b0516
CL		 79 /* ZyXEL NWD271N */
80 { USB_DEVICE(0x0586, 0x3417) },
b63a2cb3
CL		 81 /* Z-Com UB81 BG */
82 { USB_DEVICE(0x0cde, 0x0023) },
83 /* Z-Com UB82 ABG */
84 { USB_DEVICE(0x0cde, 0x0026) },
85 /* Arcadyan WN7512 */
86 { USB_DEVICE(0x083a, 0xf522) },
87 /* Planex GWUS300 */
88 { USB_DEVICE(0x2019, 0x5304) },
89 /* IO-Data WNGDNUS2 */
90 { USB_DEVICE(0x04bb, 0x093f) },
bdf6d32f
LR		 91 /* AVM FRITZ!WLAN USB Stick N */
92 { USB_DEVICE(0x057C, 0x8401) },
93 /* AVM FRITZ!WLAN USB Stick N 2.4 */
94 { USB_DEVICE(0x057C, 0x8402), .driver_info = AR9170_REQ_FW1_ONLY },
b63a2cb3
CL		 95
96 /* terminate */
97 {}
98};
99MODULE_DEVICE_TABLE(usb, ar9170_usb_ids);
100
9b9c5aae
CL		 101static void ar9170_usb_submit_urb(struct ar9170_usb *aru)
102{
103 struct urb *urb;
104 unsigned long flags;
105 int err;
106
107 if (unlikely(!IS_STARTED(&aru->common)))
108 return ;
109
110 spin_lock_irqsave(&aru->tx_urb_lock, flags);
111 if (aru->tx_submitted_urbs >= AR9170_NUM_TX_URBS) {
112 spin_unlock_irqrestore(&aru->tx_urb_lock, flags);
113 return ;
114 }
115 aru->tx_submitted_urbs++;
116
117 urb = usb_get_from_anchor(&aru->tx_pending);
118 if (!urb) {
119 aru->tx_submitted_urbs--;
120 spin_unlock_irqrestore(&aru->tx_urb_lock, flags);
121
122 return ;
123 }
124 spin_unlock_irqrestore(&aru->tx_urb_lock, flags);
125
126 aru->tx_pending_urbs--;
127 usb_anchor_urb(urb, &aru->tx_submitted);
128
129 err = usb_submit_urb(urb, GFP_ATOMIC);
130 if (unlikely(err)) {
131 if (ar9170_nag_limiter(&aru->common))
132 dev_err(&aru->udev->dev, "submit_urb failed (%d).\n",
133 err);
134
135 usb_unanchor_urb(urb);
136 aru->tx_submitted_urbs--;
137 ar9170_tx_callback(&aru->common, urb->context);
138 }
139
140 usb_free_urb(urb);
141}
142
143static void ar9170_usb_tx_urb_complete_frame(struct urb *urb)
b63a2cb3
CL		 144{
145 struct sk_buff *skb = urb->context;
146 struct ar9170_usb *aru = (struct ar9170_usb *)
147 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
148
66d00813 149 if (unlikely(!aru)) {
b63a2cb3
CL		 150 dev_kfree_skb_irq(skb);
151 return ;
152 }
153
9b9c5aae
CL		 154 aru->tx_submitted_urbs--;
155
156 ar9170_tx_callback(&aru->common, skb);
157
158 ar9170_usb_submit_urb(aru);
b63a2cb3
CL		 159}
160
161static void ar9170_usb_tx_urb_complete(struct urb *urb)
162{
163}
164
165static void ar9170_usb_irq_completed(struct urb *urb)
166{
167 struct ar9170_usb *aru = urb->context;
168
169 switch (urb->status) {
170 /* everything is fine */
171 case 0:
172 break;
173
174 /* disconnect */
175 case -ENOENT:
176 case -ECONNRESET:
177 case -ENODEV:
178 case -ESHUTDOWN:
179 goto free;
180
181 default:
182 goto resubmit;
183 }
184
66d00813
CL		 185 ar9170_handle_command_response(&aru->common, urb->transfer_buffer,
186 urb->actual_length);
b63a2cb3
CL		 187
188resubmit:
189 usb_anchor_urb(urb, &aru->rx_submitted);
190 if (usb_submit_urb(urb, GFP_ATOMIC)) {
191 usb_unanchor_urb(urb);
192 goto free;
193 }
194
195 return;
196
197free:
198 usb_buffer_free(aru->udev, 64, urb->transfer_buffer, urb->transfer_dma);
199}
200
201static void ar9170_usb_rx_completed(struct urb *urb)
202{
203 struct sk_buff *skb = urb->context;
204 struct ar9170_usb *aru = (struct ar9170_usb *)
205 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
206 int err;
207
208 if (!aru)
209 goto free;
210
211 switch (urb->status) {
212 /* everything is fine */
213 case 0:
214 break;
215
216 /* disconnect */
217 case -ENOENT:
218 case -ECONNRESET:
219 case -ENODEV:
220 case -ESHUTDOWN:
221 goto free;
222
223 default:
224 goto resubmit;
225 }
226
227 skb_put(skb, urb->actual_length);
228 ar9170_rx(&aru->common, skb);
229
230resubmit:
231 skb_reset_tail_pointer(skb);
232 skb_trim(skb, 0);
233
234 usb_anchor_urb(urb, &aru->rx_submitted);
235 err = usb_submit_urb(urb, GFP_ATOMIC);
66d00813 236 if (unlikely(err)) {
b63a2cb3 237 usb_unanchor_urb(urb);
66d00813 238 goto free;
b63a2cb3
CL		 239 }
240
241 return ;
242
243free:
244 dev_kfree_skb_irq(skb);
b63a2cb3
CL		 245}
246
247static int ar9170_usb_prep_rx_urb(struct ar9170_usb *aru,
248 struct urb *urb, gfp_t gfp)
249{
250 struct sk_buff *skb;
251
252 skb = __dev_alloc_skb(AR9170_MAX_RX_BUFFER_SIZE + 32, gfp);
253 if (!skb)
254 return -ENOMEM;
255
256 /* reserve some space for mac80211's radiotap */
257 skb_reserve(skb, 32);
258
259 usb_fill_bulk_urb(urb, aru->udev,
260 usb_rcvbulkpipe(aru->udev, AR9170_EP_RX),
261 skb->data, min(skb_tailroom(skb),
262 AR9170_MAX_RX_BUFFER_SIZE),
263 ar9170_usb_rx_completed, skb);
264
265 return 0;
266}
267
268static int ar9170_usb_alloc_rx_irq_urb(struct ar9170_usb *aru)
269{
270 struct urb *urb = NULL;
271 void *ibuf;
272 int err = -ENOMEM;
273
274 /* initialize interrupt endpoint */
275 urb = usb_alloc_urb(0, GFP_KERNEL);
276 if (!urb)
277 goto out;
278
279 ibuf = usb_buffer_alloc(aru->udev, 64, GFP_KERNEL, &urb->transfer_dma);
280 if (!ibuf)
281 goto out;
282
283 usb_fill_int_urb(urb, aru->udev,
284 usb_rcvintpipe(aru->udev, AR9170_EP_IRQ), ibuf,
285 64, ar9170_usb_irq_completed, aru, 1);
286 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
287
288 usb_anchor_urb(urb, &aru->rx_submitted);
289 err = usb_submit_urb(urb, GFP_KERNEL);
290 if (err) {
291 usb_unanchor_urb(urb);
292 usb_buffer_free(aru->udev, 64, urb->transfer_buffer,
293 urb->transfer_dma);
294 }
295
296out:
297 usb_free_urb(urb);
298 return err;
299}
300
301static int ar9170_usb_alloc_rx_bulk_urbs(struct ar9170_usb *aru)
302{
303 struct urb *urb;
304 int i;
305 int err = -EINVAL;
306
307 for (i = 0; i < AR9170_NUM_RX_URBS; i++) {
308 err = -ENOMEM;
309 urb = usb_alloc_urb(0, GFP_KERNEL);
310 if (!urb)
311 goto err_out;
312
313 err = ar9170_usb_prep_rx_urb(aru, urb, GFP_KERNEL);
314 if (err) {
315 usb_free_urb(urb);
316 goto err_out;
317 }
318
319 usb_anchor_urb(urb, &aru->rx_submitted);
320 err = usb_submit_urb(urb, GFP_KERNEL);
321 if (err) {
322 usb_unanchor_urb(urb);
323 dev_kfree_skb_any((void *) urb->transfer_buffer);
324 usb_free_urb(urb);
325 goto err_out;
326 }
327 usb_free_urb(urb);
328 }
329
330 /* the device now waiting for a firmware. */
331 aru->common.state = AR9170_IDLE;
332 return 0;
333
334err_out:
335
336 usb_kill_anchored_urbs(&aru->rx_submitted);
337 return err;
338}
339
9b9c5aae 340static int ar9170_usb_flush(struct ar9170 *ar)
b63a2cb3 341{
9b9c5aae
CL		 342 struct ar9170_usb *aru = (void *) ar;
343 struct urb *urb;
344 int ret, err = 0;
b63a2cb3 345
9b9c5aae
CL		 346 if (IS_STARTED(ar))
347 aru->common.state = AR9170_IDLE;
b63a2cb3 348
9b9c5aae
CL		 349 usb_wait_anchor_empty_timeout(&aru->tx_pending,
350 msecs_to_jiffies(800));
351 while ((urb = usb_get_from_anchor(&aru->tx_pending))) {
352 ar9170_tx_callback(&aru->common, (void *) urb->context);
353 usb_free_urb(urb);
354 }
b63a2cb3 355
9b9c5aae 356 /* lets wait a while until the tx - queues are dried out */
b63a2cb3
CL		 357 ret = usb_wait_anchor_empty_timeout(&aru->tx_submitted,
358 msecs_to_jiffies(100));
359 if (ret == 0)
9b9c5aae
CL		 360 err = -ETIMEDOUT;
361
362 usb_kill_anchored_urbs(&aru->tx_submitted);
363
364 if (IS_ACCEPTING_CMD(ar))
365 aru->common.state = AR9170_STARTED;
366
367 return err;
368}
369
370static void ar9170_usb_cancel_urbs(struct ar9170_usb *aru)
371{
372 int err;
b63a2cb3 373
9b9c5aae
CL		 374 aru->common.state = AR9170_UNKNOWN_STATE;
375
376 err = ar9170_usb_flush(&aru->common);
377 if (err)
378 dev_err(&aru->udev->dev, "stuck tx urbs!\n");
379
380 usb_poison_anchored_urbs(&aru->tx_submitted);
b63a2cb3
CL		 381 usb_poison_anchored_urbs(&aru->rx_submitted);
382}
383
384static int ar9170_usb_exec_cmd(struct ar9170 *ar, enum ar9170_cmd cmd,
385 unsigned int plen, void *payload,
386 unsigned int outlen, void *out)
387{
388 struct ar9170_usb *aru = (void *) ar;
389 struct urb *urb = NULL;
390 unsigned long flags;
391 int err = -ENOMEM;
392
393 if (unlikely(!IS_ACCEPTING_CMD(ar)))
394 return -EPERM;
395
396 if (WARN_ON(plen > AR9170_MAX_CMD_LEN - 4))
397 return -EINVAL;
398
399 urb = usb_alloc_urb(0, GFP_ATOMIC);
400 if (unlikely(!urb))
401 goto err_free;
402
403 ar->cmdbuf[0] = cpu_to_le32(plen);
404 ar->cmdbuf[0] |= cpu_to_le32(cmd << 8);
405 /* writing multiple regs fills this buffer already */
406 if (plen && payload != (u8 *)(&ar->cmdbuf[1]))
407 memcpy(&ar->cmdbuf[1], payload, plen);
408
409 spin_lock_irqsave(&aru->common.cmdlock, flags);
410 aru->readbuf = (u8 *)out;
411 aru->readlen = outlen;
412 spin_unlock_irqrestore(&aru->common.cmdlock, flags);
413
414 usb_fill_int_urb(urb, aru->udev,
415 usb_sndbulkpipe(aru->udev, AR9170_EP_CMD),
416 aru->common.cmdbuf, plen + 4,
417 ar9170_usb_tx_urb_complete, NULL, 1);
418
419 usb_anchor_urb(urb, &aru->tx_submitted);
420 err = usb_submit_urb(urb, GFP_ATOMIC);
66d00813 421 if (unlikely(err)) {
b63a2cb3
CL		 422 usb_unanchor_urb(urb);
423 usb_free_urb(urb);
424 goto err_unbuf;
425 }
426 usb_free_urb(urb);
427
428 err = wait_for_completion_timeout(&aru->cmd_wait, HZ);
429 if (err == 0) {
430 err = -ETIMEDOUT;
431 goto err_unbuf;
432 }
433
ba5101d0 434 if (aru->readlen != outlen) {
b63a2cb3
CL		 435 err = -EMSGSIZE;
436 goto err_unbuf;
437 }
438
439 return 0;
440
441err_unbuf:
442 /* Maybe the device was removed in the second we were waiting? */
443 if (IS_STARTED(ar)) {
444 dev_err(&aru->udev->dev, "no command feedback "
445 "received (%d).\n", err);
446
447 /* provide some maybe useful debug information */
448 print_hex_dump_bytes("ar9170 cmd: ", DUMP_PREFIX_NONE,
449 aru->common.cmdbuf, plen + 4);
450 dump_stack();
451 }
452
453 /* invalidate to avoid completing the next prematurely */
454 spin_lock_irqsave(&aru->common.cmdlock, flags);
455 aru->readbuf = NULL;
456 aru->readlen = 0;
457 spin_unlock_irqrestore(&aru->common.cmdlock, flags);
458
459err_free:
460
461 return err;
462}
463
9b9c5aae 464static int ar9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb)
b63a2cb3
CL		 465{
466 struct ar9170_usb *aru = (struct ar9170_usb *) ar;
467 struct urb *urb;
b63a2cb3
CL		 468
469 if (unlikely(!IS_STARTED(ar))) {
470 /* Seriously, what were you drink... err... thinking!? */
471 return -EPERM;
472 }
473
474 urb = usb_alloc_urb(0, GFP_ATOMIC);
475 if (unlikely(!urb))
476 return -ENOMEM;
477
478 usb_fill_bulk_urb(urb, aru->udev,
479 usb_sndbulkpipe(aru->udev, AR9170_EP_TX),
9b9c5aae
CL		 480 skb->data, skb->len,
481 ar9170_usb_tx_urb_complete_frame, skb);
b63a2cb3
CL		 482 urb->transfer_flags |= URB_ZERO_PACKET;
483
9b9c5aae
CL		 484 usb_anchor_urb(urb, &aru->tx_pending);
485 aru->tx_pending_urbs++;
b63a2cb3
CL		 486
487 usb_free_urb(urb);
9b9c5aae
CL		 488
489 ar9170_usb_submit_urb(aru);
490 return 0;
b63a2cb3
CL		 491}
492
493static void ar9170_usb_callback_cmd(struct ar9170 *ar, u32 len , void *buffer)
494{
495 struct ar9170_usb *aru = (void *) ar;
496 unsigned long flags;
497 u32 in, out;
498
66d00813 499 if (unlikely(!buffer))
b63a2cb3
CL		 500 return ;
501
502 in = le32_to_cpup((__le32 *)buffer);
503 out = le32_to_cpu(ar->cmdbuf[0]);
504
505 /* mask off length byte */
506 out &= ~0xFF;
507
508 if (aru->readlen >= 0) {
509 /* add expected length */
510 out |= aru->readlen;
511 } else {
512 /* add obtained length */
513 out |= in & 0xFF;
514 }
515
516 /*
517 * Some commands (e.g: AR9170_CMD_FREQUENCY) have a variable response
518 * length and we cannot predict the correct length in advance.
519 * So we only check if we provided enough space for the data.
520 */
521 if (unlikely(out < in)) {
522 dev_warn(&aru->udev->dev, "received invalid command response "
523 "got %d bytes, instead of %d bytes "
524 "and the resp length is %d bytes\n",
525 in, out, len);
526 print_hex_dump_bytes("ar9170 invalid resp: ",
527 DUMP_PREFIX_OFFSET, buffer, len);
528 /*
529 * Do not complete, then the command times out,
530 * and we get a stack trace from there.
531 */
532 return ;
533 }
534
535 spin_lock_irqsave(&aru->common.cmdlock, flags);
536 if (aru->readbuf && len > 0) {
537 memcpy(aru->readbuf, buffer + 4, len - 4);
538 aru->readbuf = NULL;
539 }
540 complete(&aru->cmd_wait);
541 spin_unlock_irqrestore(&aru->common.cmdlock, flags);
542}
543
544static int ar9170_usb_upload(struct ar9170_usb *aru, const void *data,
545 size_t len, u32 addr, bool complete)
546{
547 int transfer, err;
548 u8 *buf = kmalloc(4096, GFP_KERNEL);
549
550 if (!buf)
551 return -ENOMEM;
552
553 while (len) {
554 transfer = min_t(int, len, 4096);
555 memcpy(buf, data, transfer);
556
557 err = usb_control_msg(aru->udev, usb_sndctrlpipe(aru->udev, 0),
558 0x30 /* FW DL */, 0x40 | USB_DIR_OUT,
559 addr >> 8, 0, buf, transfer, 1000);
560
561 if (err < 0) {
562 kfree(buf);
563 return err;
564 }
565
566 len -= transfer;
567 data += transfer;
568 addr += transfer;
569 }
570 kfree(buf);
571
572 if (complete) {
573 err = usb_control_msg(aru->udev, usb_sndctrlpipe(aru->udev, 0),
574 0x31 /* FW DL COMPLETE */,
575 0x40 | USB_DIR_OUT, 0, 0, NULL, 0, 5000);
576 }
577
578 return 0;
579}
580
581static int ar9170_usb_request_firmware(struct ar9170_usb *aru)
582{
583 int err = 0;
584
c768b58d 585 err = request_firmware(&aru->firmware, "ar9170.fw",
b63a2cb3 586 &aru->udev->dev);
c768b58d
LR		 587 if (!err) {
588 aru->init_values = NULL;
589 return 0;
b63a2cb3
CL		 590 }
591
bdf6d32f
LR		 592 if (aru->req_one_stage_fw) {
593 dev_err(&aru->udev->dev, "ar9170.fw firmware file "
594 "not found and is required for this device\n");
595 return -EINVAL;
596 }
597
c768b58d
LR		 598 dev_err(&aru->udev->dev, "ar9170.fw firmware file "
599 "not found, trying old firmware...\n");
600
601 err = request_firmware(&aru->init_values, "ar9170-1.fw",
602 &aru->udev->dev);
363ec561
CL		 603 if (err) {
604 dev_err(&aru->udev->dev, "file with init values not found.\n");
605 return err;
606 }
c768b58d 607
b63a2cb3
CL		 608 err = request_firmware(&aru->firmware, "ar9170-2.fw", &aru->udev->dev);
609 if (err) {
610 release_firmware(aru->init_values);
363ec561 611 dev_err(&aru->udev->dev, "firmware file not found.\n");
b63a2cb3
CL		 612 return err;
613 }
614
615 return err;
616}
617
618static int ar9170_usb_reset(struct ar9170_usb *aru)
619{
620 int ret, lock = (aru->intf->condition != USB_INTERFACE_BINDING);
621
622 if (lock) {
623 ret = usb_lock_device_for_reset(aru->udev, aru->intf);
624 if (ret < 0) {
625 dev_err(&aru->udev->dev, "unable to lock device "
626 "for reset (%d).\n", ret);
627 return ret;
628 }
629 }
630
631 ret = usb_reset_device(aru->udev);
632 if (lock)
633 usb_unlock_device(aru->udev);
634
635 /* let it rest - for a second - */
636 msleep(1000);
637
638 return ret;
639}
640
641static int ar9170_usb_upload_firmware(struct ar9170_usb *aru)
642{
643 int err;
644
c768b58d
LR		 645 if (!aru->init_values)
646 goto upload_fw_start;
647
b63a2cb3
CL		 648 /* First, upload initial values to device RAM */
649 err = ar9170_usb_upload(aru, aru->init_values->data,
650 aru->init_values->size, 0x102800, false);
651 if (err) {
652 dev_err(&aru->udev->dev, "firmware part 1 "
653 "upload failed (%d).\n", err);
654 return err;
655 }
656
c768b58d
LR		 657upload_fw_start:
658
b63a2cb3
CL		 659 /* Then, upload the firmware itself and start it */
660 return ar9170_usb_upload(aru, aru->firmware->data, aru->firmware->size,
661 0x200000, true);
662}
663
664static int ar9170_usb_init_transport(struct ar9170_usb *aru)
665{
666 struct ar9170 *ar = (void *) &aru->common;
667 int err;
668
669 ar9170_regwrite_begin(ar);
670
671 /* Set USB Rx stream mode MAX packet number to 2 */
672 ar9170_regwrite(AR9170_USB_REG_MAX_AGG_UPLOAD, 0x4);
673
674 /* Set USB Rx stream mode timeout to 10us */
675 ar9170_regwrite(AR9170_USB_REG_UPLOAD_TIME_CTL, 0x80);
676
677 ar9170_regwrite_finish();
678
679 err = ar9170_regwrite_result();
680 if (err)
681 dev_err(&aru->udev->dev, "USB setup failed (%d).\n", err);
682
683 return err;
684}
685
686static void ar9170_usb_stop(struct ar9170 *ar)
687{
688 struct ar9170_usb *aru = (void *) ar;
689 int ret;
690
691 if (IS_ACCEPTING_CMD(ar))
692 aru->common.state = AR9170_STOPPED;
693
9b9c5aae
CL		 694 ret = ar9170_usb_flush(ar);
695 if (ret)
b63a2cb3
CL		 696 dev_err(&aru->udev->dev, "kill pending tx urbs.\n");
697
698 usb_poison_anchored_urbs(&aru->tx_submitted);
699
700 /*
701 * Note:
702 * So far we freed all tx urbs, but we won't dare to touch any rx urbs.
703 * Else we would end up with a unresponsive device...
704 */
705}
706
707static int ar9170_usb_open(struct ar9170 *ar)
708{
709 struct ar9170_usb *aru = (void *) ar;
710 int err;
711
712 usb_unpoison_anchored_urbs(&aru->tx_submitted);
713 err = ar9170_usb_init_transport(aru);
714 if (err) {
715 usb_poison_anchored_urbs(&aru->tx_submitted);
716 return err;
717 }
718
719 aru->common.state = AR9170_IDLE;
720 return 0;
721}
722
e10a9dfc
CL		 723static int ar9170_usb_init_device(struct ar9170_usb *aru)
724{
725 int err;
726
727 err = ar9170_usb_alloc_rx_irq_urb(aru);
728 if (err)
729 goto err_out;
730
731 err = ar9170_usb_alloc_rx_bulk_urbs(aru);
732 if (err)
733 goto err_unrx;
734
735 err = ar9170_usb_upload_firmware(aru);
736 if (err) {
737 err = ar9170_echo_test(&aru->common, 0x60d43110);
738 if (err) {
739 /* force user invention, by disabling the device */
740 err = usb_driver_set_configuration(aru->udev, -1);
741 dev_err(&aru->udev->dev, "device is in a bad state. "
742 "please reconnect it!\n");
743 goto err_unrx;
744 }
745 }
746
747 return 0;
748
749err_unrx:
750 ar9170_usb_cancel_urbs(aru);
751
752err_out:
753 return err;
754}
755
bdf6d32f
LR		 756static bool ar9170_requires_one_stage(const struct usb_device_id *id)
757{
758 if (!id->driver_info)
759 return false;
760 if (id->driver_info == AR9170_REQ_FW1_ONLY)
761 return true;
762 return false;
763}
764
b63a2cb3
CL		 765static int ar9170_usb_probe(struct usb_interface *intf,
766 const struct usb_device_id *id)
767{
768 struct ar9170_usb *aru;
769 struct ar9170 *ar;
770 struct usb_device *udev;
771 int err;
772
773 aru = ar9170_alloc(sizeof(*aru));
774 if (IS_ERR(aru)) {
775 err = PTR_ERR(aru);
776 goto out;
777 }
778
779 udev = interface_to_usbdev(intf);
780 usb_get_dev(udev);
781 aru->udev = udev;
782 aru->intf = intf;
783 ar = &aru->common;
784
bdf6d32f
LR		 785 aru->req_one_stage_fw = ar9170_requires_one_stage(id);
786
b63a2cb3 787 usb_set_intfdata(intf, aru);
92179986 788 SET_IEEE80211_DEV(ar->hw, &intf->dev);
b63a2cb3
CL		 789
790 init_usb_anchor(&aru->rx_submitted);
9b9c5aae 791 init_usb_anchor(&aru->tx_pending);
b63a2cb3
CL		 792 init_usb_anchor(&aru->tx_submitted);
793 init_completion(&aru->cmd_wait);
9b9c5aae
CL		 794 spin_lock_init(&aru->tx_urb_lock);
795
796 aru->tx_pending_urbs = 0;
797 aru->tx_submitted_urbs = 0;
b63a2cb3
CL		 798
799 aru->common.stop = ar9170_usb_stop;
9b9c5aae 800 aru->common.flush = ar9170_usb_flush;
b63a2cb3
CL		 801 aru->common.open = ar9170_usb_open;
802 aru->common.tx = ar9170_usb_tx;
803 aru->common.exec_cmd = ar9170_usb_exec_cmd;
804 aru->common.callback_cmd = ar9170_usb_callback_cmd;
805
8a713040 806#ifdef CONFIG_PM
90ccda9b 807 udev->reset_resume = 1;
66d00813 808#endif /* CONFIG_PM */
b63a2cb3
CL		 809 err = ar9170_usb_reset(aru);
810 if (err)
e10a9dfc 811 goto err_freehw;
b63a2cb3
CL		 812
813 err = ar9170_usb_request_firmware(aru);
814 if (err)
e10a9dfc 815 goto err_freehw;
b63a2cb3 816
e10a9dfc 817 err = ar9170_usb_init_device(aru);
b63a2cb3
CL		 818 if (err)
819 goto err_freefw;
820
b63a2cb3
CL		 821 err = ar9170_usb_open(ar);
822 if (err)
823 goto err_unrx;
824
825 err = ar9170_register(ar, &udev->dev);
826
827 ar9170_usb_stop(ar);
828 if (err)
829 goto err_unrx;
830
831 return 0;
832
833err_unrx:
834 ar9170_usb_cancel_urbs(aru);
835
836err_freefw:
837 release_firmware(aru->init_values);
838 release_firmware(aru->firmware);
839
e10a9dfc 840err_freehw:
b63a2cb3
CL		 841 usb_set_intfdata(intf, NULL);
842 usb_put_dev(udev);
843 ieee80211_free_hw(ar->hw);
844out:
845 return err;
846}
847
848static void ar9170_usb_disconnect(struct usb_interface *intf)
849{
850 struct ar9170_usb *aru = usb_get_intfdata(intf);
851
852 if (!aru)
853 return;
854
855 aru->common.state = AR9170_IDLE;
856 ar9170_unregister(&aru->common);
857 ar9170_usb_cancel_urbs(aru);
858
859 release_firmware(aru->init_values);
860 release_firmware(aru->firmware);
861
862 usb_put_dev(aru->udev);
863 usb_set_intfdata(intf, NULL);
864 ieee80211_free_hw(aru->common.hw);
865}
866
e10a9dfc
CL		 867#ifdef CONFIG_PM
868static int ar9170_suspend(struct usb_interface *intf,
869 pm_message_t message)
870{
871 struct ar9170_usb *aru = usb_get_intfdata(intf);
872
873 if (!aru)
874 return -ENODEV;
875
876 aru->common.state = AR9170_IDLE;
877 ar9170_usb_cancel_urbs(aru);
878
879 return 0;
880}
881
882static int ar9170_resume(struct usb_interface *intf)
883{
884 struct ar9170_usb *aru = usb_get_intfdata(intf);
885 int err;
886
887 if (!aru)
888 return -ENODEV;
889
890 usb_unpoison_anchored_urbs(&aru->rx_submitted);
891 usb_unpoison_anchored_urbs(&aru->tx_submitted);
892
e10a9dfc
CL		 893 err = ar9170_usb_init_device(aru);
894 if (err)
895 goto err_unrx;
896
897 err = ar9170_usb_open(&aru->common);
898 if (err)
899 goto err_unrx;
900
901 return 0;
902
903err_unrx:
904 aru->common.state = AR9170_IDLE;
905 ar9170_usb_cancel_urbs(aru);
906
907 return err;
908}
909#endif /* CONFIG_PM */
910
b63a2cb3
CL		 911static struct usb_driver ar9170_driver = {
912 .name = "ar9170usb",
913 .probe = ar9170_usb_probe,
914 .disconnect = ar9170_usb_disconnect,
915 .id_table = ar9170_usb_ids,
916 .soft_unbind = 1,
e10a9dfc
CL		 917#ifdef CONFIG_PM
918 .suspend = ar9170_suspend,
919 .resume = ar9170_resume,
90ccda9b 920 .reset_resume = ar9170_resume,
e10a9dfc 921#endif /* CONFIG_PM */
b63a2cb3
CL		 922};
923
924static int __init ar9170_init(void)
925{
926 return usb_register(&ar9170_driver);
927}
928
929static void __exit ar9170_exit(void)
930{
931 usb_deregister(&ar9170_driver);
932}
933
934module_init(ar9170_init);
935module_exit(ar9170_exit);
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