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Commit | Line | Data |
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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 | 51 | MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>"); |
b63a2cb3 CL |
52 | MODULE_AUTHOR("Christian Lamparter <chunkeey@web.de>"); |
53 | MODULE_LICENSE("GPL"); | |
de00c04e | 54 | MODULE_DESCRIPTION("Atheros AR9170 802.11n USB wireless"); |
c768b58d | 55 | MODULE_FIRMWARE("ar9170.fw"); |
b63a2cb3 CL |
56 | MODULE_FIRMWARE("ar9170-1.fw"); |
57 | MODULE_FIRMWARE("ar9170-2.fw"); | |
58 | ||
bdf6d32f LR |
59 | enum ar9170_requirements { |
60 | AR9170_REQ_FW1_ONLY = 1, | |
61 | }; | |
62 | ||
b63a2cb3 CL |
63 | static 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 | }; | |
104 | MODULE_DEVICE_TABLE(usb, ar9170_usb_ids); | |
105 | ||
9b9c5aae CL |
106 | static 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 | ||
148 | static 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 | ||
166 | static void ar9170_usb_tx_urb_complete(struct urb *urb) | |
167 | { | |
168 | } | |
169 | ||
170 | static 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 | |
193 | resubmit: | |
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 | ||
202 | free: | |
203 | usb_buffer_free(aru->udev, 64, urb->transfer_buffer, urb->transfer_dma); | |
204 | } | |
205 | ||
206 | static 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 | ||
235 | resubmit: | |
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 | ||
248 | free: | |
249 | dev_kfree_skb_irq(skb); | |
b63a2cb3 CL |
250 | } |
251 | ||
252 | static 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 | ||
273 | static 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 | ||
301 | out: | |
302 | usb_free_urb(urb); | |
303 | return err; | |
304 | } | |
305 | ||
306 | static 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 | ||
339 | err_out: | |
340 | ||
341 | usb_kill_anchored_urbs(&aru->rx_submitted); | |
342 | return err; | |
343 | } | |
344 | ||
9b9c5aae | 345 | static 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 | ||
375 | static 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 | ||
389 | static 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 | ||
446 | err_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 | ||
464 | err_free: | |
465 | ||
466 | return err; | |
467 | } | |
468 | ||
9b9c5aae | 469 | static 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 | ||
498 | static 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 | ||
549 | static 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 |
586 | static 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 | ||
609 | static 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 |
625 | upload_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 | ||
632 | static 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 | ||
654 | static 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 | ||
675 | static 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 |
691 | static 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 | ||
717 | err_unrx: | |
718 | ar9170_usb_cancel_urbs(aru); | |
719 | ||
720 | err_out: | |
721 | return err; | |
722 | } | |
723 | ||
53576517 JB |
724 | static 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 | ||
736 | static 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 | ||
771 | static 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 | ||
794 | static 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 |
821 | static 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 |
830 | static 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 | 881 | err_freehw: |
b63a2cb3 CL |
882 | usb_set_intfdata(intf, NULL); |
883 | usb_put_dev(udev); | |
884 | ieee80211_free_hw(ar->hw); | |
885 | out: | |
886 | return err; | |
887 | } | |
888 | ||
889 | static 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 |
909 | static 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 | ||
923 | static 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 | ||
944 | err_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 |
952 | static 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 | ||
965 | static int __init ar9170_init(void) | |
966 | { | |
967 | return usb_register(&ar9170_driver); | |
968 | } | |
969 | ||
970 | static void __exit ar9170_exit(void) | |
971 | { | |
972 | usb_deregister(&ar9170_driver); | |
973 | } | |
974 | ||
975 | module_init(ar9170_init); | |
976 | module_exit(ar9170_exit); |