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