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