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ar9170: fix for driver-core ABI change
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / ath / ar9170 / usb.c
blobc8121a6a9d3a414daeb93f118525b4cffeb1b70a
1 /*
2 * Atheros AR9170 driver
3 *
4 * USB - frontend
5 *
6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2009, Christian Lamparter <chunkeey@web.de>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; see the file COPYING. If not, see
21 * http://www.gnu.org/licenses/.
22 *
23 * This file incorporates work covered by the following copyright and
24 * permission notice:
25 * Copyright (c) 2007-2008 Atheros Communications, Inc.
26 *
27 * Permission to use, copy, modify, and/or distribute this software for any
28 * purpose with or without fee is hereby granted, provided that the above
29 * copyright notice and this permission notice appear in all copies.
30 *
31 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
32 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
33 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
34 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
35 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
36 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
37 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
38 */
39
40 #include <linux/module.h>
41 #include <linux/slab.h>
42 #include <linux/usb.h>
43 #include <linux/firmware.h>
44 #include <linux/etherdevice.h>
45 #include <linux/device.h>
46 #include <net/mac80211.h>
47 #include "ar9170.h"
48 #include "cmd.h"
49 #include "hw.h"
50 #include "usb.h"
51
52 MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
53 MODULE_AUTHOR("Christian Lamparter <chunkeey@web.de>");
54 MODULE_LICENSE("GPL");
55 MODULE_DESCRIPTION("Atheros AR9170 802.11n USB wireless");
56 MODULE_FIRMWARE("ar9170.fw");
57 MODULE_FIRMWARE("ar9170-1.fw");
58 MODULE_FIRMWARE("ar9170-2.fw");
59
60 enum ar9170_requirements {
61 AR9170_REQ_FW1_ONLY = 1,
62 };
63
64 static struct usb_device_id ar9170_usb_ids[] = {
65 /* Atheros 9170 */
66 { USB_DEVICE(0x0cf3, 0x9170) },
67 /* Atheros TG121N */
68 { USB_DEVICE(0x0cf3, 0x1001) },
69 /* TP-Link TL-WN821N v2 */
70 { USB_DEVICE(0x0cf3, 0x1002) },
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) },
75 /* Cace Airpcap NX */
76 { USB_DEVICE(0xcace, 0x0300) },
77 /* D-Link DWA 160 A1 */
78 { USB_DEVICE(0x07d1, 0x3c10) },
79 /* D-Link DWA 160 A2 */
80 { USB_DEVICE(0x07d1, 0x3a09) },
81 /* Netgear WNA1000 */
82 { USB_DEVICE(0x0846, 0x9040) },
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) },
89 /* Proxim ORiNOCO 802.11n USB */
90 { USB_DEVICE(0x1435, 0x0804) },
91 /* WNC Generic 11n USB Dongle */
92 { USB_DEVICE(0x1435, 0x0326) },
93 /* ZyXEL NWD271N */
94 { USB_DEVICE(0x0586, 0x3417) },
95 /* Z-Com UB81 BG */
96 { USB_DEVICE(0x0cde, 0x0023) },
97 /* Z-Com UB82 ABG */
98 { USB_DEVICE(0x0cde, 0x0026) },
99 /* Sphairon Homelink 1202 */
100 { USB_DEVICE(0x0cde, 0x0027) },
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) },
107 /* AVM FRITZ!WLAN USB Stick N */
108 { USB_DEVICE(0x057C, 0x8401) },
109 /* NEC WL300NU-G */
110 { USB_DEVICE(0x0409, 0x0249) },
111 /* AVM FRITZ!WLAN USB Stick N 2.4 */
112 { USB_DEVICE(0x057C, 0x8402), .driver_info = AR9170_REQ_FW1_ONLY },
113
114 /* terminate */
115 {}
116 };
117 MODULE_DEVICE_TABLE(usb, ar9170_usb_ids);
118
119 static void ar9170_usb_submit_urb(struct ar9170_usb *aru)
120 {
121 struct urb *urb;
122 unsigned long flags;
123 int err;
124
125 if (unlikely(!IS_STARTED(&aru->common)))
126 return ;
127
128 spin_lock_irqsave(&aru->tx_urb_lock, flags);
129 if (atomic_read(&aru->tx_submitted_urbs) >= AR9170_NUM_TX_URBS) {
130 spin_unlock_irqrestore(&aru->tx_urb_lock, flags);
131 return ;
132 }
133 atomic_inc(&aru->tx_submitted_urbs);
134
135 urb = usb_get_from_anchor(&aru->tx_pending);
136 if (!urb) {
137 atomic_dec(&aru->tx_submitted_urbs);
138 spin_unlock_irqrestore(&aru->tx_urb_lock, flags);
139
140 return ;
141 }
142 spin_unlock_irqrestore(&aru->tx_urb_lock, flags);
143
144 aru->tx_pending_urbs--;
145 usb_anchor_urb(urb, &aru->tx_submitted);
146
147 err = usb_submit_urb(urb, GFP_ATOMIC);
148 if (unlikely(err)) {
149 if (ar9170_nag_limiter(&aru->common))
150 dev_err(&aru->udev->dev, "submit_urb failed (%d).\n",
151 err);
152
153 usb_unanchor_urb(urb);
154 atomic_dec(&aru->tx_submitted_urbs);
155 ar9170_tx_callback(&aru->common, urb->context);
156 }
157
158 usb_free_urb(urb);
159 }
160
161 static void ar9170_usb_tx_urb_complete_frame(struct urb *urb)
162 {
163 struct sk_buff *skb = urb->context;
164 struct ar9170_usb *aru = (struct ar9170_usb *)
165 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
166
167 if (unlikely(!aru)) {
168 dev_kfree_skb_irq(skb);
169 return ;
170 }
171
172 atomic_dec(&aru->tx_submitted_urbs);
173
174 ar9170_tx_callback(&aru->common, skb);
175
176 ar9170_usb_submit_urb(aru);
177 }
178
179 static void ar9170_usb_tx_urb_complete(struct urb *urb)
180 {
181 }
182
183 static void ar9170_usb_irq_completed(struct urb *urb)
184 {
185 struct ar9170_usb *aru = urb->context;
186
187 switch (urb->status) {
188 /* everything is fine */
189 case 0:
190 break;
191
192 /* disconnect */
193 case -ENOENT:
194 case -ECONNRESET:
195 case -ENODEV:
196 case -ESHUTDOWN:
197 goto free;
198
199 default:
200 goto resubmit;
201 }
202
203 ar9170_handle_command_response(&aru->common, urb->transfer_buffer,
204 urb->actual_length);
205
206 resubmit:
207 usb_anchor_urb(urb, &aru->rx_submitted);
208 if (usb_submit_urb(urb, GFP_ATOMIC)) {
209 usb_unanchor_urb(urb);
210 goto free;
211 }
212
213 return;
214
215 free:
216 usb_buffer_free(aru->udev, 64, urb->transfer_buffer, urb->transfer_dma);
217 }
218
219 static void ar9170_usb_rx_completed(struct urb *urb)
220 {
221 struct sk_buff *skb = urb->context;
222 struct ar9170_usb *aru = (struct ar9170_usb *)
223 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
224 int err;
225
226 if (!aru)
227 goto free;
228
229 switch (urb->status) {
230 /* everything is fine */
231 case 0:
232 break;
233
234 /* disconnect */
235 case -ENOENT:
236 case -ECONNRESET:
237 case -ENODEV:
238 case -ESHUTDOWN:
239 goto free;
240
241 default:
242 goto resubmit;
243 }
244
245 skb_put(skb, urb->actual_length);
246 ar9170_rx(&aru->common, skb);
247
248 resubmit:
249 skb_reset_tail_pointer(skb);
250 skb_trim(skb, 0);
251
252 usb_anchor_urb(urb, &aru->rx_submitted);
253 err = usb_submit_urb(urb, GFP_ATOMIC);
254 if (unlikely(err)) {
255 usb_unanchor_urb(urb);
256 goto free;
257 }
258
259 return ;
260
261 free:
262 dev_kfree_skb_irq(skb);
263 }
264
265 static int ar9170_usb_prep_rx_urb(struct ar9170_usb *aru,
266 struct urb *urb, gfp_t gfp)
267 {
268 struct sk_buff *skb;
269
270 skb = __dev_alloc_skb(AR9170_MAX_RX_BUFFER_SIZE + 32, gfp);
271 if (!skb)
272 return -ENOMEM;
273
274 /* reserve some space for mac80211's radiotap */
275 skb_reserve(skb, 32);
276
277 usb_fill_bulk_urb(urb, aru->udev,
278 usb_rcvbulkpipe(aru->udev, AR9170_EP_RX),
279 skb->data, min(skb_tailroom(skb),
280 AR9170_MAX_RX_BUFFER_SIZE),
281 ar9170_usb_rx_completed, skb);
282
283 return 0;
284 }
285
286 static int ar9170_usb_alloc_rx_irq_urb(struct ar9170_usb *aru)
287 {
288 struct urb *urb = NULL;
289 void *ibuf;
290 int err = -ENOMEM;
291
292 /* initialize interrupt endpoint */
293 urb = usb_alloc_urb(0, GFP_KERNEL);
294 if (!urb)
295 goto out;
296
297 ibuf = usb_buffer_alloc(aru->udev, 64, GFP_KERNEL, &urb->transfer_dma);
298 if (!ibuf)
299 goto out;
300
301 usb_fill_int_urb(urb, aru->udev,
302 usb_rcvintpipe(aru->udev, AR9170_EP_IRQ), ibuf,
303 64, ar9170_usb_irq_completed, aru, 1);
304 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
305
306 usb_anchor_urb(urb, &aru->rx_submitted);
307 err = usb_submit_urb(urb, GFP_KERNEL);
308 if (err) {
309 usb_unanchor_urb(urb);
310 usb_buffer_free(aru->udev, 64, urb->transfer_buffer,
311 urb->transfer_dma);
312 }
313
314 out:
315 usb_free_urb(urb);
316 return err;
317 }
318
319 static int ar9170_usb_alloc_rx_bulk_urbs(struct ar9170_usb *aru)
320 {
321 struct urb *urb;
322 int i;
323 int err = -EINVAL;
324
325 for (i = 0; i < AR9170_NUM_RX_URBS; i++) {
326 err = -ENOMEM;
327 urb = usb_alloc_urb(0, GFP_KERNEL);
328 if (!urb)
329 goto err_out;
330
331 err = ar9170_usb_prep_rx_urb(aru, urb, GFP_KERNEL);
332 if (err) {
333 usb_free_urb(urb);
334 goto err_out;
335 }
336
337 usb_anchor_urb(urb, &aru->rx_submitted);
338 err = usb_submit_urb(urb, GFP_KERNEL);
339 if (err) {
340 usb_unanchor_urb(urb);
341 dev_kfree_skb_any((void *) urb->transfer_buffer);
342 usb_free_urb(urb);
343 goto err_out;
344 }
345 usb_free_urb(urb);
346 }
347
348 /* the device now waiting for a firmware. */
349 aru->common.state = AR9170_IDLE;
350 return 0;
351
352 err_out:
353
354 usb_kill_anchored_urbs(&aru->rx_submitted);
355 return err;
356 }
357
358 static int ar9170_usb_flush(struct ar9170 *ar)
359 {
360 struct ar9170_usb *aru = (void *) ar;
361 struct urb *urb;
362 int ret, err = 0;
363
364 if (IS_STARTED(ar))
365 aru->common.state = AR9170_IDLE;
366
367 usb_wait_anchor_empty_timeout(&aru->tx_pending,
368 msecs_to_jiffies(800));
369 while ((urb = usb_get_from_anchor(&aru->tx_pending))) {
370 ar9170_tx_callback(&aru->common, (void *) urb->context);
371 usb_free_urb(urb);
372 }
373
374 /* lets wait a while until the tx - queues are dried out */
375 ret = usb_wait_anchor_empty_timeout(&aru->tx_submitted,
376 msecs_to_jiffies(100));
377 if (ret == 0)
378 err = -ETIMEDOUT;
379
380 usb_kill_anchored_urbs(&aru->tx_submitted);
381
382 if (IS_ACCEPTING_CMD(ar))
383 aru->common.state = AR9170_STARTED;
384
385 return err;
386 }
387
388 static void ar9170_usb_cancel_urbs(struct ar9170_usb *aru)
389 {
390 int err;
391
392 aru->common.state = AR9170_UNKNOWN_STATE;
393
394 err = ar9170_usb_flush(&aru->common);
395 if (err)
396 dev_err(&aru->udev->dev, "stuck tx urbs!\n");
397
398 usb_poison_anchored_urbs(&aru->tx_submitted);
399 usb_poison_anchored_urbs(&aru->rx_submitted);
400 }
401
402 static int ar9170_usb_exec_cmd(struct ar9170 *ar, enum ar9170_cmd cmd,
403 unsigned int plen, void *payload,
404 unsigned int outlen, void *out)
405 {
406 struct ar9170_usb *aru = (void *) ar;
407 struct urb *urb = NULL;
408 unsigned long flags;
409 int err = -ENOMEM;
410
411 if (unlikely(!IS_ACCEPTING_CMD(ar)))
412 return -EPERM;
413
414 if (WARN_ON(plen > AR9170_MAX_CMD_LEN - 4))
415 return -EINVAL;
416
417 urb = usb_alloc_urb(0, GFP_ATOMIC);
418 if (unlikely(!urb))
419 goto err_free;
420
421 ar->cmdbuf[0] = cpu_to_le32(plen);
422 ar->cmdbuf[0] |= cpu_to_le32(cmd << 8);
423 /* writing multiple regs fills this buffer already */
424 if (plen && payload != (u8 *)(&ar->cmdbuf[1]))
425 memcpy(&ar->cmdbuf[1], payload, plen);
426
427 spin_lock_irqsave(&aru->common.cmdlock, flags);
428 aru->readbuf = (u8 *)out;
429 aru->readlen = outlen;
430 spin_unlock_irqrestore(&aru->common.cmdlock, flags);
431
432 usb_fill_int_urb(urb, aru->udev,
433 usb_sndintpipe(aru->udev, AR9170_EP_CMD),
434 aru->common.cmdbuf, plen + 4,
435 ar9170_usb_tx_urb_complete, NULL, 1);
436
437 usb_anchor_urb(urb, &aru->tx_submitted);
438 err = usb_submit_urb(urb, GFP_ATOMIC);
439 if (unlikely(err)) {
440 usb_unanchor_urb(urb);
441 usb_free_urb(urb);
442 goto err_unbuf;
443 }
444 usb_free_urb(urb);
445
446 err = wait_for_completion_timeout(&aru->cmd_wait, HZ);
447 if (err == 0) {
448 err = -ETIMEDOUT;
449 goto err_unbuf;
450 }
451
452 if (aru->readlen != outlen) {
453 err = -EMSGSIZE;
454 goto err_unbuf;
455 }
456
457 return 0;
458
459 err_unbuf:
460 /* Maybe the device was removed in the second we were waiting? */
461 if (IS_STARTED(ar)) {
462 dev_err(&aru->udev->dev, "no command feedback "
463 "received (%d).\n", err);
464
465 /* provide some maybe useful debug information */
466 print_hex_dump_bytes("ar9170 cmd: ", DUMP_PREFIX_NONE,
467 aru->common.cmdbuf, plen + 4);
468 dump_stack();
469 }
470
471 /* invalidate to avoid completing the next prematurely */
472 spin_lock_irqsave(&aru->common.cmdlock, flags);
473 aru->readbuf = NULL;
474 aru->readlen = 0;
475 spin_unlock_irqrestore(&aru->common.cmdlock, flags);
476
477 err_free:
478
479 return err;
480 }
481
482 static int ar9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb)
483 {
484 struct ar9170_usb *aru = (struct ar9170_usb *) ar;
485 struct urb *urb;
486
487 if (unlikely(!IS_STARTED(ar))) {
488 /* Seriously, what were you drink... err... thinking!? */
489 return -EPERM;
490 }
491
492 urb = usb_alloc_urb(0, GFP_ATOMIC);
493 if (unlikely(!urb))
494 return -ENOMEM;
495
496 usb_fill_bulk_urb(urb, aru->udev,
497 usb_sndbulkpipe(aru->udev, AR9170_EP_TX),
498 skb->data, skb->len,
499 ar9170_usb_tx_urb_complete_frame, skb);
500 urb->transfer_flags |= URB_ZERO_PACKET;
501
502 usb_anchor_urb(urb, &aru->tx_pending);
503 aru->tx_pending_urbs++;
504
505 usb_free_urb(urb);
506
507 ar9170_usb_submit_urb(aru);
508 return 0;
509 }
510
511 static void ar9170_usb_callback_cmd(struct ar9170 *ar, u32 len , void *buffer)
512 {
513 struct ar9170_usb *aru = (void *) ar;
514 unsigned long flags;
515 u32 in, out;
516
517 if (unlikely(!buffer))
518 return ;
519
520 in = le32_to_cpup((__le32 *)buffer);
521 out = le32_to_cpu(ar->cmdbuf[0]);
522
523 /* mask off length byte */
524 out &= ~0xFF;
525
526 if (aru->readlen >= 0) {
527 /* add expected length */
528 out |= aru->readlen;
529 } else {
530 /* add obtained length */
531 out |= in & 0xFF;
532 }
533
534 /*
535 * Some commands (e.g: AR9170_CMD_FREQUENCY) have a variable response
536 * length and we cannot predict the correct length in advance.
537 * So we only check if we provided enough space for the data.
538 */
539 if (unlikely(out < in)) {
540 dev_warn(&aru->udev->dev, "received invalid command response "
541 "got %d bytes, instead of %d bytes "
542 "and the resp length is %d bytes\n",
543 in, out, len);
544 print_hex_dump_bytes("ar9170 invalid resp: ",
545 DUMP_PREFIX_OFFSET, buffer, len);
546 /*
547 * Do not complete, then the command times out,
548 * and we get a stack trace from there.
549 */
550 return ;
551 }
552
553 spin_lock_irqsave(&aru->common.cmdlock, flags);
554 if (aru->readbuf && len > 0) {
555 memcpy(aru->readbuf, buffer + 4, len - 4);
556 aru->readbuf = NULL;
557 }
558 complete(&aru->cmd_wait);
559 spin_unlock_irqrestore(&aru->common.cmdlock, flags);
560 }
561
562 static int ar9170_usb_upload(struct ar9170_usb *aru, const void *data,
563 size_t len, u32 addr, bool complete)
564 {
565 int transfer, err;
566 u8 *buf = kmalloc(4096, GFP_KERNEL);
567
568 if (!buf)
569 return -ENOMEM;
570
571 while (len) {
572 transfer = min_t(int, len, 4096);
573 memcpy(buf, data, transfer);
574
575 err = usb_control_msg(aru->udev, usb_sndctrlpipe(aru->udev, 0),
576 0x30 /* FW DL */, 0x40 | USB_DIR_OUT,
577 addr >> 8, 0, buf, transfer, 1000);
578
579 if (err < 0) {
580 kfree(buf);
581 return err;
582 }
583
584 len -= transfer;
585 data += transfer;
586 addr += transfer;
587 }
588 kfree(buf);
589
590 if (complete) {
591 err = usb_control_msg(aru->udev, usb_sndctrlpipe(aru->udev, 0),
592 0x31 /* FW DL COMPLETE */,
593 0x40 | USB_DIR_OUT, 0, 0, NULL, 0, 5000);
594 }
595
596 return 0;
597 }
598
599 static int ar9170_usb_reset(struct ar9170_usb *aru)
600 {
601 int ret, lock = (aru->intf->condition != USB_INTERFACE_BINDING);
602
603 if (lock) {
604 ret = usb_lock_device_for_reset(aru->udev, aru->intf);
605 if (ret < 0) {
606 dev_err(&aru->udev->dev, "unable to lock device "
607 "for reset (%d).\n", ret);
608 return ret;
609 }
610 }
611
612 ret = usb_reset_device(aru->udev);
613 if (lock)
614 usb_unlock_device(aru->udev);
615
616 /* let it rest - for a second - */
617 msleep(1000);
618
619 return ret;
620 }
621
622 static int ar9170_usb_upload_firmware(struct ar9170_usb *aru)
623 {
624 int err;
625
626 if (!aru->init_values)
627 goto upload_fw_start;
628
629 /* First, upload initial values to device RAM */
630 err = ar9170_usb_upload(aru, aru->init_values->data,
631 aru->init_values->size, 0x102800, false);
632 if (err) {
633 dev_err(&aru->udev->dev, "firmware part 1 "
634 "upload failed (%d).\n", err);
635 return err;
636 }
637
638 upload_fw_start:
639
640 /* Then, upload the firmware itself and start it */
641 return ar9170_usb_upload(aru, aru->firmware->data, aru->firmware->size,
642 0x200000, true);
643 }
644
645 static int ar9170_usb_init_transport(struct ar9170_usb *aru)
646 {
647 struct ar9170 *ar = (void *) &aru->common;
648 int err;
649
650 ar9170_regwrite_begin(ar);
651
652 /* Set USB Rx stream mode MAX packet number to 2 */
653 ar9170_regwrite(AR9170_USB_REG_MAX_AGG_UPLOAD, 0x4);
654
655 /* Set USB Rx stream mode timeout to 10us */
656 ar9170_regwrite(AR9170_USB_REG_UPLOAD_TIME_CTL, 0x80);
657
658 ar9170_regwrite_finish();
659
660 err = ar9170_regwrite_result();
661 if (err)
662 dev_err(&aru->udev->dev, "USB setup failed (%d).\n", err);
663
664 return err;
665 }
666
667 static void ar9170_usb_stop(struct ar9170 *ar)
668 {
669 struct ar9170_usb *aru = (void *) ar;
670 int ret;
671
672 if (IS_ACCEPTING_CMD(ar))
673 aru->common.state = AR9170_STOPPED;
674
675 ret = ar9170_usb_flush(ar);
676 if (ret)
677 dev_err(&aru->udev->dev, "kill pending tx urbs.\n");
678
679 usb_poison_anchored_urbs(&aru->tx_submitted);
680
681 /*
682 * Note:
683 * So far we freed all tx urbs, but we won't dare to touch any rx urbs.
684 * Else we would end up with a unresponsive device...
685 */
686 }
687
688 static int ar9170_usb_open(struct ar9170 *ar)
689 {
690 struct ar9170_usb *aru = (void *) ar;
691 int err;
692
693 usb_unpoison_anchored_urbs(&aru->tx_submitted);
694 err = ar9170_usb_init_transport(aru);
695 if (err) {
696 usb_poison_anchored_urbs(&aru->tx_submitted);
697 return err;
698 }
699
700 aru->common.state = AR9170_IDLE;
701 return 0;
702 }
703
704 static int ar9170_usb_init_device(struct ar9170_usb *aru)
705 {
706 int err;
707
708 err = ar9170_usb_alloc_rx_irq_urb(aru);
709 if (err)
710 goto err_out;
711
712 err = ar9170_usb_alloc_rx_bulk_urbs(aru);
713 if (err)
714 goto err_unrx;
715
716 err = ar9170_usb_upload_firmware(aru);
717 if (err) {
718 err = ar9170_echo_test(&aru->common, 0x60d43110);
719 if (err) {
720 /* force user invention, by disabling the device */
721 err = usb_driver_set_configuration(aru->udev, -1);
722 dev_err(&aru->udev->dev, "device is in a bad state. "
723 "please reconnect it!\n");
724 goto err_unrx;
725 }
726 }
727
728 return 0;
729
730 err_unrx:
731 ar9170_usb_cancel_urbs(aru);
732
733 err_out:
734 return err;
735 }
736
737 static void ar9170_usb_firmware_failed(struct ar9170_usb *aru)
738 {
739 struct device *parent = aru->udev->dev.parent;
740
741 /* unbind anything failed */
742 if (parent)
743 device_lock(parent);
744 device_release_driver(&aru->udev->dev);
745 if (parent)
746 device_unlock(parent);
747 }
748
749 static void ar9170_usb_firmware_finish(const struct firmware *fw, void *context)
750 {
751 struct ar9170_usb *aru = context;
752 int err;
753
754 aru->firmware = fw;
755
756 if (!fw) {
757 dev_err(&aru->udev->dev, "firmware file not found.\n");
758 goto err_freefw;
759 }
760
761 err = ar9170_usb_init_device(aru);
762 if (err)
763 goto err_freefw;
764
765 err = ar9170_usb_open(&aru->common);
766 if (err)
767 goto err_unrx;
768
769 err = ar9170_register(&aru->common, &aru->udev->dev);
770
771 ar9170_usb_stop(&aru->common);
772 if (err)
773 goto err_unrx;
774
775 return;
776
777 err_unrx:
778 ar9170_usb_cancel_urbs(aru);
779
780 err_freefw:
781 ar9170_usb_firmware_failed(aru);
782 }
783
784 static void ar9170_usb_firmware_inits(const struct firmware *fw,
785 void *context)
786 {
787 struct ar9170_usb *aru = context;
788 int err;
789
790 if (!fw) {
791 dev_err(&aru->udev->dev, "file with init values not found.\n");
792 ar9170_usb_firmware_failed(aru);
793 return;
794 }
795
796 aru->init_values = fw;
797
798 /* ok so we have the init values -- get code for two-stage */
799
800 err = request_firmware_nowait(THIS_MODULE, 1, "ar9170-2.fw",
801 &aru->udev->dev, GFP_KERNEL, aru,
802 ar9170_usb_firmware_finish);
803 if (err)
804 ar9170_usb_firmware_failed(aru);
805 }
806
807 static void ar9170_usb_firmware_step2(const struct firmware *fw, void *context)
808 {
809 struct ar9170_usb *aru = context;
810 int err;
811
812 if (fw) {
813 ar9170_usb_firmware_finish(fw, context);
814 return;
815 }
816
817 if (aru->req_one_stage_fw) {
818 dev_err(&aru->udev->dev, "ar9170.fw firmware file "
819 "not found and is required for this device\n");
820 ar9170_usb_firmware_failed(aru);
821 return;
822 }
823
824 dev_err(&aru->udev->dev, "ar9170.fw firmware file "
825 "not found, trying old firmware...\n");
826
827 err = request_firmware_nowait(THIS_MODULE, 1, "ar9170-1.fw",
828 &aru->udev->dev, GFP_KERNEL, aru,
829 ar9170_usb_firmware_inits);
830 if (err)
831 ar9170_usb_firmware_failed(aru);
832 }
833
834 static bool ar9170_requires_one_stage(const struct usb_device_id *id)
835 {
836 if (!id->driver_info)
837 return false;
838 if (id->driver_info == AR9170_REQ_FW1_ONLY)
839 return true;
840 return false;
841 }
842
843 static int ar9170_usb_probe(struct usb_interface *intf,
844 const struct usb_device_id *id)
845 {
846 struct ar9170_usb *aru;
847 struct ar9170 *ar;
848 struct usb_device *udev;
849 int err;
850
851 aru = ar9170_alloc(sizeof(*aru));
852 if (IS_ERR(aru)) {
853 err = PTR_ERR(aru);
854 goto out;
855 }
856
857 udev = interface_to_usbdev(intf);
858 usb_get_dev(udev);
859 aru->udev = udev;
860 aru->intf = intf;
861 ar = &aru->common;
862
863 aru->req_one_stage_fw = ar9170_requires_one_stage(id);
864
865 usb_set_intfdata(intf, aru);
866 SET_IEEE80211_DEV(ar->hw, &intf->dev);
867
868 init_usb_anchor(&aru->rx_submitted);
869 init_usb_anchor(&aru->tx_pending);
870 init_usb_anchor(&aru->tx_submitted);
871 init_completion(&aru->cmd_wait);
872 spin_lock_init(&aru->tx_urb_lock);
873
874 aru->tx_pending_urbs = 0;
875 atomic_set(&aru->tx_submitted_urbs, 0);
876
877 aru->common.stop = ar9170_usb_stop;
878 aru->common.flush = ar9170_usb_flush;
879 aru->common.open = ar9170_usb_open;
880 aru->common.tx = ar9170_usb_tx;
881 aru->common.exec_cmd = ar9170_usb_exec_cmd;
882 aru->common.callback_cmd = ar9170_usb_callback_cmd;
883
884 #ifdef CONFIG_PM
885 udev->reset_resume = 1;
886 #endif /* CONFIG_PM */
887 err = ar9170_usb_reset(aru);
888 if (err)
889 goto err_freehw;
890
891 return request_firmware_nowait(THIS_MODULE, 1, "ar9170.fw",
892 &aru->udev->dev, GFP_KERNEL, aru,
893 ar9170_usb_firmware_step2);
894 err_freehw:
895 usb_set_intfdata(intf, NULL);
896 usb_put_dev(udev);
897 ieee80211_free_hw(ar->hw);
898 out:
899 return err;
900 }
901
902 static void ar9170_usb_disconnect(struct usb_interface *intf)
903 {
904 struct ar9170_usb *aru = usb_get_intfdata(intf);
905
906 if (!aru)
907 return;
908
909 aru->common.state = AR9170_IDLE;
910 ar9170_unregister(&aru->common);
911 ar9170_usb_cancel_urbs(aru);
912
913 usb_put_dev(aru->udev);
914 usb_set_intfdata(intf, NULL);
915 ieee80211_free_hw(aru->common.hw);
916
917 release_firmware(aru->init_values);
918 release_firmware(aru->firmware);
919 }
920
921 #ifdef CONFIG_PM
922 static int ar9170_suspend(struct usb_interface *intf,
923 pm_message_t message)
924 {
925 struct ar9170_usb *aru = usb_get_intfdata(intf);
926
927 if (!aru)
928 return -ENODEV;
929
930 aru->common.state = AR9170_IDLE;
931 ar9170_usb_cancel_urbs(aru);
932
933 return 0;
934 }
935
936 static int ar9170_resume(struct usb_interface *intf)
937 {
938 struct ar9170_usb *aru = usb_get_intfdata(intf);
939 int err;
940
941 if (!aru)
942 return -ENODEV;
943
944 usb_unpoison_anchored_urbs(&aru->rx_submitted);
945 usb_unpoison_anchored_urbs(&aru->tx_submitted);
946
947 err = ar9170_usb_init_device(aru);
948 if (err)
949 goto err_unrx;
950
951 err = ar9170_usb_open(&aru->common);
952 if (err)
953 goto err_unrx;
954
955 return 0;
956
957 err_unrx:
958 aru->common.state = AR9170_IDLE;
959 ar9170_usb_cancel_urbs(aru);
960
961 return err;
962 }
963 #endif /* CONFIG_PM */
964
965 static struct usb_driver ar9170_driver = {
966 .name = "ar9170usb",
967 .probe = ar9170_usb_probe,
968 .disconnect = ar9170_usb_disconnect,
969 .id_table = ar9170_usb_ids,
970 .soft_unbind = 1,
971 #ifdef CONFIG_PM
972 .suspend = ar9170_suspend,
973 .resume = ar9170_resume,
974 .reset_resume = ar9170_resume,
975 #endif /* CONFIG_PM */
976 };
977
978 static int __init ar9170_init(void)
979 {
980 return usb_register(&ar9170_driver);
981 }
982
983 static void __exit ar9170_exit(void)
984 {
985 usb_deregister(&ar9170_driver);
986 }
987
988 module_init(ar9170_init);
989 module_exit(ar9170_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree