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spi-topcliff-pch: add recovery processing in case wait-event timeout
[zen-stable.git] / drivers / net / wireless / ath / ath9k / hif_usb.c
blob77c8ded8de57bd7738bf62925383414cb01da951
1 /*
2 * Copyright (c) 2010-2011 Atheros Communications Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include <asm/unaligned.h>
18 #include "htc.h"
19
20 /* identify firmware images */
21 #define FIRMWARE_AR7010_1_1 "htc_7010.fw"
22 #define FIRMWARE_AR9271 "htc_9271.fw"
23
24 MODULE_FIRMWARE(FIRMWARE_AR7010_1_1);
25 MODULE_FIRMWARE(FIRMWARE_AR9271);
26
27 static struct usb_device_id ath9k_hif_usb_ids[] = {
28 { USB_DEVICE(0x0cf3, 0x9271) }, /* Atheros */
29 { USB_DEVICE(0x0cf3, 0x1006) }, /* Atheros */
30 { USB_DEVICE(0x0846, 0x9030) }, /* Netgear N150 */
31 { USB_DEVICE(0x07D1, 0x3A10) }, /* Dlink Wireless 150 */
32 { USB_DEVICE(0x13D3, 0x3327) }, /* Azurewave */
33 { USB_DEVICE(0x13D3, 0x3328) }, /* Azurewave */
34 { USB_DEVICE(0x13D3, 0x3346) }, /* IMC Networks */
35 { USB_DEVICE(0x13D3, 0x3348) }, /* Azurewave */
36 { USB_DEVICE(0x13D3, 0x3349) }, /* Azurewave */
37 { USB_DEVICE(0x13D3, 0x3350) }, /* Azurewave */
38 { USB_DEVICE(0x04CA, 0x4605) }, /* Liteon */
39 { USB_DEVICE(0x040D, 0x3801) }, /* VIA */
40 { USB_DEVICE(0x0cf3, 0xb003) }, /* Ubiquiti WifiStation Ext */
41 { USB_DEVICE(0x057c, 0x8403) }, /* AVM FRITZ!WLAN 11N v2 USB */
42
43 { USB_DEVICE(0x0cf3, 0x7015),
44 .driver_info = AR9287_USB }, /* Atheros */
45 { USB_DEVICE(0x1668, 0x1200),
46 .driver_info = AR9287_USB }, /* Verizon */
47
48 { USB_DEVICE(0x0cf3, 0x7010),
49 .driver_info = AR9280_USB }, /* Atheros */
50 { USB_DEVICE(0x0846, 0x9018),
51 .driver_info = AR9280_USB }, /* Netgear WNDA3200 */
52 { USB_DEVICE(0x083A, 0xA704),
53 .driver_info = AR9280_USB }, /* SMC Networks */
54 { USB_DEVICE(0x0411, 0x017f),
55 .driver_info = AR9280_USB }, /* Sony UWA-BR100 */
56
57 { USB_DEVICE(0x0cf3, 0x20ff),
58 .driver_info = STORAGE_DEVICE },
59
60 { },
61 };
62
63 MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids);
64
65 static int __hif_usb_tx(struct hif_device_usb *hif_dev);
66
67 static void hif_usb_regout_cb(struct urb *urb)
68 {
69 struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
70
71 switch (urb->status) {
72 case 0:
73 break;
74 case -ENOENT:
75 case -ECONNRESET:
76 case -ENODEV:
77 case -ESHUTDOWN:
78 goto free;
79 default:
80 break;
81 }
82
83 if (cmd) {
84 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
85 cmd->skb, true);
86 kfree(cmd);
87 }
88
89 return;
90 free:
91 kfree_skb(cmd->skb);
92 kfree(cmd);
93 }
94
95 static int hif_usb_send_regout(struct hif_device_usb *hif_dev,
96 struct sk_buff *skb)
97 {
98 struct urb *urb;
99 struct cmd_buf *cmd;
100 int ret = 0;
101
102 urb = usb_alloc_urb(0, GFP_KERNEL);
103 if (urb == NULL)
104 return -ENOMEM;
105
106 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
107 if (cmd == NULL) {
108 usb_free_urb(urb);
109 return -ENOMEM;
110 }
111
112 cmd->skb = skb;
113 cmd->hif_dev = hif_dev;
114
115 usb_fill_bulk_urb(urb, hif_dev->udev,
116 usb_sndbulkpipe(hif_dev->udev, USB_REG_OUT_PIPE),
117 skb->data, skb->len,
118 hif_usb_regout_cb, cmd);
119
120 usb_anchor_urb(urb, &hif_dev->regout_submitted);
121 ret = usb_submit_urb(urb, GFP_KERNEL);
122 if (ret) {
123 usb_unanchor_urb(urb);
124 kfree(cmd);
125 }
126 usb_free_urb(urb);
127
128 return ret;
129 }
130
131 static void hif_usb_mgmt_cb(struct urb *urb)
132 {
133 struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
134 struct hif_device_usb *hif_dev;
135 bool txok = true;
136
137 if (!cmd || !cmd->skb || !cmd->hif_dev)
138 return;
139
140 hif_dev = cmd->hif_dev;
141
142 switch (urb->status) {
143 case 0:
144 break;
145 case -ENOENT:
146 case -ECONNRESET:
147 case -ENODEV:
148 case -ESHUTDOWN:
149 txok = false;
150
151 /*
152 * If the URBs are being flushed, no need to complete
153 * this packet.
154 */
155 spin_lock(&hif_dev->tx.tx_lock);
156 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) {
157 spin_unlock(&hif_dev->tx.tx_lock);
158 dev_kfree_skb_any(cmd->skb);
159 kfree(cmd);
160 return;
161 }
162 spin_unlock(&hif_dev->tx.tx_lock);
163
164 break;
165 default:
166 txok = false;
167 break;
168 }
169
170 skb_pull(cmd->skb, 4);
171 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
172 cmd->skb, txok);
173 kfree(cmd);
174 }
175
176 static int hif_usb_send_mgmt(struct hif_device_usb *hif_dev,
177 struct sk_buff *skb)
178 {
179 struct urb *urb;
180 struct cmd_buf *cmd;
181 int ret = 0;
182 __le16 *hdr;
183
184 urb = usb_alloc_urb(0, GFP_ATOMIC);
185 if (urb == NULL)
186 return -ENOMEM;
187
188 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
189 if (cmd == NULL) {
190 usb_free_urb(urb);
191 return -ENOMEM;
192 }
193
194 cmd->skb = skb;
195 cmd->hif_dev = hif_dev;
196
197 hdr = (__le16 *) skb_push(skb, 4);
198 *hdr++ = cpu_to_le16(skb->len - 4);
199 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG);
200
201 usb_fill_bulk_urb(urb, hif_dev->udev,
202 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
203 skb->data, skb->len,
204 hif_usb_mgmt_cb, cmd);
205
206 usb_anchor_urb(urb, &hif_dev->mgmt_submitted);
207 ret = usb_submit_urb(urb, GFP_ATOMIC);
208 if (ret) {
209 usb_unanchor_urb(urb);
210 kfree(cmd);
211 }
212 usb_free_urb(urb);
213
214 return ret;
215 }
216
217 static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev,
218 struct sk_buff_head *list)
219 {
220 struct sk_buff *skb;
221
222 while ((skb = __skb_dequeue(list)) != NULL) {
223 dev_kfree_skb_any(skb);
224 }
225 }
226
227 static inline void ath9k_skb_queue_complete(struct hif_device_usb *hif_dev,
228 struct sk_buff_head *queue,
229 bool txok)
230 {
231 struct sk_buff *skb;
232
233 while ((skb = __skb_dequeue(queue)) != NULL) {
234 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
235 skb, txok);
236 if (txok)
237 TX_STAT_INC(skb_success);
238 else
239 TX_STAT_INC(skb_failed);
240 }
241 }
242
243 static void hif_usb_tx_cb(struct urb *urb)
244 {
245 struct tx_buf *tx_buf = (struct tx_buf *) urb->context;
246 struct hif_device_usb *hif_dev;
247 bool txok = true;
248
249 if (!tx_buf || !tx_buf->hif_dev)
250 return;
251
252 hif_dev = tx_buf->hif_dev;
253
254 switch (urb->status) {
255 case 0:
256 break;
257 case -ENOENT:
258 case -ECONNRESET:
259 case -ENODEV:
260 case -ESHUTDOWN:
261 txok = false;
262
263 /*
264 * If the URBs are being flushed, no need to add this
265 * URB to the free list.
266 */
267 spin_lock(&hif_dev->tx.tx_lock);
268 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) {
269 spin_unlock(&hif_dev->tx.tx_lock);
270 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
271 return;
272 }
273 spin_unlock(&hif_dev->tx.tx_lock);
274
275 break;
276 default:
277 txok = false;
278 break;
279 }
280
281 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, txok);
282
283 /* Re-initialize the SKB queue */
284 tx_buf->len = tx_buf->offset = 0;
285 __skb_queue_head_init(&tx_buf->skb_queue);
286
287 /* Add this TX buffer to the free list */
288 spin_lock(&hif_dev->tx.tx_lock);
289 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
290 hif_dev->tx.tx_buf_cnt++;
291 if (!(hif_dev->tx.flags & HIF_USB_TX_STOP))
292 __hif_usb_tx(hif_dev); /* Check for pending SKBs */
293 TX_STAT_INC(buf_completed);
294 spin_unlock(&hif_dev->tx.tx_lock);
295 }
296
297 /* TX lock has to be taken */
298 static int __hif_usb_tx(struct hif_device_usb *hif_dev)
299 {
300 struct tx_buf *tx_buf = NULL;
301 struct sk_buff *nskb = NULL;
302 int ret = 0, i;
303 u16 tx_skb_cnt = 0;
304 u8 *buf;
305 __le16 *hdr;
306
307 if (hif_dev->tx.tx_skb_cnt == 0)
308 return 0;
309
310 /* Check if a free TX buffer is available */
311 if (list_empty(&hif_dev->tx.tx_buf))
312 return 0;
313
314 tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list);
315 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending);
316 hif_dev->tx.tx_buf_cnt--;
317
318 tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM);
319
320 for (i = 0; i < tx_skb_cnt; i++) {
321 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue);
322
323 /* Should never be NULL */
324 BUG_ON(!nskb);
325
326 hif_dev->tx.tx_skb_cnt--;
327
328 buf = tx_buf->buf;
329 buf += tx_buf->offset;
330 hdr = (__le16 *)buf;
331 *hdr++ = cpu_to_le16(nskb->len);
332 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG);
333 buf += 4;
334 memcpy(buf, nskb->data, nskb->len);
335 tx_buf->len = nskb->len + 4;
336
337 if (i < (tx_skb_cnt - 1))
338 tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4;
339
340 if (i == (tx_skb_cnt - 1))
341 tx_buf->len += tx_buf->offset;
342
343 __skb_queue_tail(&tx_buf->skb_queue, nskb);
344 TX_STAT_INC(skb_queued);
345 }
346
347 usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev,
348 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
349 tx_buf->buf, tx_buf->len,
350 hif_usb_tx_cb, tx_buf);
351
352 ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC);
353 if (ret) {
354 tx_buf->len = tx_buf->offset = 0;
355 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, false);
356 __skb_queue_head_init(&tx_buf->skb_queue);
357 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
358 hif_dev->tx.tx_buf_cnt++;
359 }
360
361 if (!ret)
362 TX_STAT_INC(buf_queued);
363
364 return ret;
365 }
366
367 static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb)
368 {
369 struct ath9k_htc_tx_ctl *tx_ctl;
370 unsigned long flags;
371 int ret = 0;
372
373 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
374
375 if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
376 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
377 return -ENODEV;
378 }
379
380 /* Check if the max queue count has been reached */
381 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) {
382 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
383 return -ENOMEM;
384 }
385
386 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
387
388 tx_ctl = HTC_SKB_CB(skb);
389
390 /* Mgmt/Beacon frames don't use the TX buffer pool */
391 if ((tx_ctl->type == ATH9K_HTC_MGMT) ||
392 (tx_ctl->type == ATH9K_HTC_BEACON)) {
393 ret = hif_usb_send_mgmt(hif_dev, skb);
394 }
395
396 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
397
398 if ((tx_ctl->type == ATH9K_HTC_NORMAL) ||
399 (tx_ctl->type == ATH9K_HTC_AMPDU)) {
400 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb);
401 hif_dev->tx.tx_skb_cnt++;
402 }
403
404 /* Check if AMPDUs have to be sent immediately */
405 if ((hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) &&
406 (hif_dev->tx.tx_skb_cnt < 2)) {
407 __hif_usb_tx(hif_dev);
408 }
409
410 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
411
412 return ret;
413 }
414
415 static void hif_usb_start(void *hif_handle)
416 {
417 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
418 unsigned long flags;
419
420 hif_dev->flags |= HIF_USB_START;
421
422 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
423 hif_dev->tx.flags &= ~HIF_USB_TX_STOP;
424 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
425 }
426
427 static void hif_usb_stop(void *hif_handle)
428 {
429 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
430 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
431 unsigned long flags;
432
433 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
434 ath9k_skb_queue_complete(hif_dev, &hif_dev->tx.tx_skb_queue, false);
435 hif_dev->tx.tx_skb_cnt = 0;
436 hif_dev->tx.flags |= HIF_USB_TX_STOP;
437 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
438
439 /* The pending URBs have to be canceled. */
440 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
441 &hif_dev->tx.tx_pending, list) {
442 usb_kill_urb(tx_buf->urb);
443 }
444
445 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
446 }
447
448 static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb)
449 {
450 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
451 int ret = 0;
452
453 switch (pipe_id) {
454 case USB_WLAN_TX_PIPE:
455 ret = hif_usb_send_tx(hif_dev, skb);
456 break;
457 case USB_REG_OUT_PIPE:
458 ret = hif_usb_send_regout(hif_dev, skb);
459 break;
460 default:
461 dev_err(&hif_dev->udev->dev,
462 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id);
463 ret = -EINVAL;
464 break;
465 }
466
467 return ret;
468 }
469
470 static inline bool check_index(struct sk_buff *skb, u8 idx)
471 {
472 struct ath9k_htc_tx_ctl *tx_ctl;
473
474 tx_ctl = HTC_SKB_CB(skb);
475
476 if ((tx_ctl->type == ATH9K_HTC_AMPDU) &&
477 (tx_ctl->sta_idx == idx))
478 return true;
479
480 return false;
481 }
482
483 static void hif_usb_sta_drain(void *hif_handle, u8 idx)
484 {
485 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
486 struct sk_buff *skb, *tmp;
487 unsigned long flags;
488
489 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
490
491 skb_queue_walk_safe(&hif_dev->tx.tx_skb_queue, skb, tmp) {
492 if (check_index(skb, idx)) {
493 __skb_unlink(skb, &hif_dev->tx.tx_skb_queue);
494 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
495 skb, false);
496 hif_dev->tx.tx_skb_cnt--;
497 TX_STAT_INC(skb_failed);
498 }
499 }
500
501 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
502 }
503
504 static struct ath9k_htc_hif hif_usb = {
505 .transport = ATH9K_HIF_USB,
506 .name = "ath9k_hif_usb",
507
508 .control_ul_pipe = USB_REG_OUT_PIPE,
509 .control_dl_pipe = USB_REG_IN_PIPE,
510
511 .start = hif_usb_start,
512 .stop = hif_usb_stop,
513 .sta_drain = hif_usb_sta_drain,
514 .send = hif_usb_send,
515 };
516
517 static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev,
518 struct sk_buff *skb)
519 {
520 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER];
521 int index = 0, i = 0, len = skb->len;
522 int rx_remain_len, rx_pkt_len;
523 u16 pool_index = 0;
524 u8 *ptr;
525
526 spin_lock(&hif_dev->rx_lock);
527
528 rx_remain_len = hif_dev->rx_remain_len;
529 rx_pkt_len = hif_dev->rx_transfer_len;
530
531 if (rx_remain_len != 0) {
532 struct sk_buff *remain_skb = hif_dev->remain_skb;
533
534 if (remain_skb) {
535 ptr = (u8 *) remain_skb->data;
536
537 index = rx_remain_len;
538 rx_remain_len -= hif_dev->rx_pad_len;
539 ptr += rx_pkt_len;
540
541 memcpy(ptr, skb->data, rx_remain_len);
542
543 rx_pkt_len += rx_remain_len;
544 hif_dev->rx_remain_len = 0;
545 skb_put(remain_skb, rx_pkt_len);
546
547 skb_pool[pool_index++] = remain_skb;
548
549 } else {
550 index = rx_remain_len;
551 }
552 }
553
554 spin_unlock(&hif_dev->rx_lock);
555
556 while (index < len) {
557 u16 pkt_len;
558 u16 pkt_tag;
559 u16 pad_len;
560 int chk_idx;
561
562 ptr = (u8 *) skb->data;
563
564 pkt_len = get_unaligned_le16(ptr + index);
565 pkt_tag = get_unaligned_le16(ptr + index + 2);
566
567 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) {
568 RX_STAT_INC(skb_dropped);
569 return;
570 }
571
572 pad_len = 4 - (pkt_len & 0x3);
573 if (pad_len == 4)
574 pad_len = 0;
575
576 chk_idx = index;
577 index = index + 4 + pkt_len + pad_len;
578
579 if (index > MAX_RX_BUF_SIZE) {
580 spin_lock(&hif_dev->rx_lock);
581 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE;
582 hif_dev->rx_transfer_len =
583 MAX_RX_BUF_SIZE - chk_idx - 4;
584 hif_dev->rx_pad_len = pad_len;
585
586 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
587 if (!nskb) {
588 dev_err(&hif_dev->udev->dev,
589 "ath9k_htc: RX memory allocation error\n");
590 spin_unlock(&hif_dev->rx_lock);
591 goto err;
592 }
593 skb_reserve(nskb, 32);
594 RX_STAT_INC(skb_allocated);
595
596 memcpy(nskb->data, &(skb->data[chk_idx+4]),
597 hif_dev->rx_transfer_len);
598
599 /* Record the buffer pointer */
600 hif_dev->remain_skb = nskb;
601 spin_unlock(&hif_dev->rx_lock);
602 } else {
603 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
604 if (!nskb) {
605 dev_err(&hif_dev->udev->dev,
606 "ath9k_htc: RX memory allocation error\n");
607 goto err;
608 }
609 skb_reserve(nskb, 32);
610 RX_STAT_INC(skb_allocated);
611
612 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len);
613 skb_put(nskb, pkt_len);
614 skb_pool[pool_index++] = nskb;
615 }
616 }
617
618 err:
619 for (i = 0; i < pool_index; i++) {
620 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i],
621 skb_pool[i]->len, USB_WLAN_RX_PIPE);
622 RX_STAT_INC(skb_completed);
623 }
624 }
625
626 static void ath9k_hif_usb_rx_cb(struct urb *urb)
627 {
628 struct sk_buff *skb = (struct sk_buff *) urb->context;
629 struct hif_device_usb *hif_dev =
630 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
631 int ret;
632
633 if (!skb)
634 return;
635
636 if (!hif_dev)
637 goto free;
638
639 switch (urb->status) {
640 case 0:
641 break;
642 case -ENOENT:
643 case -ECONNRESET:
644 case -ENODEV:
645 case -ESHUTDOWN:
646 goto free;
647 default:
648 goto resubmit;
649 }
650
651 if (likely(urb->actual_length != 0)) {
652 skb_put(skb, urb->actual_length);
653 ath9k_hif_usb_rx_stream(hif_dev, skb);
654 }
655
656 resubmit:
657 skb_reset_tail_pointer(skb);
658 skb_trim(skb, 0);
659
660 usb_anchor_urb(urb, &hif_dev->rx_submitted);
661 ret = usb_submit_urb(urb, GFP_ATOMIC);
662 if (ret) {
663 usb_unanchor_urb(urb);
664 goto free;
665 }
666
667 return;
668 free:
669 kfree_skb(skb);
670 }
671
672 static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
673 {
674 struct sk_buff *skb = (struct sk_buff *) urb->context;
675 struct sk_buff *nskb;
676 struct hif_device_usb *hif_dev =
677 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
678 int ret;
679
680 if (!skb)
681 return;
682
683 if (!hif_dev)
684 goto free;
685
686 switch (urb->status) {
687 case 0:
688 break;
689 case -ENOENT:
690 case -ECONNRESET:
691 case -ENODEV:
692 case -ESHUTDOWN:
693 goto free;
694 default:
695 skb_reset_tail_pointer(skb);
696 skb_trim(skb, 0);
697
698 goto resubmit;
699 }
700
701 if (likely(urb->actual_length != 0)) {
702 skb_put(skb, urb->actual_length);
703
704 /* Process the command first */
705 ath9k_htc_rx_msg(hif_dev->htc_handle, skb,
706 skb->len, USB_REG_IN_PIPE);
707
708
709 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC);
710 if (!nskb) {
711 dev_err(&hif_dev->udev->dev,
712 "ath9k_htc: REG_IN memory allocation failure\n");
713 urb->context = NULL;
714 return;
715 }
716
717 usb_fill_bulk_urb(urb, hif_dev->udev,
718 usb_rcvbulkpipe(hif_dev->udev,
719 USB_REG_IN_PIPE),
720 nskb->data, MAX_REG_IN_BUF_SIZE,
721 ath9k_hif_usb_reg_in_cb, nskb);
722 }
723
724 resubmit:
725 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
726 ret = usb_submit_urb(urb, GFP_ATOMIC);
727 if (ret) {
728 usb_unanchor_urb(urb);
729 goto free;
730 }
731
732 return;
733 free:
734 kfree_skb(skb);
735 urb->context = NULL;
736 }
737
738 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
739 {
740 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
741 unsigned long flags;
742
743 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
744 &hif_dev->tx.tx_buf, list) {
745 usb_kill_urb(tx_buf->urb);
746 list_del(&tx_buf->list);
747 usb_free_urb(tx_buf->urb);
748 kfree(tx_buf->buf);
749 kfree(tx_buf);
750 }
751
752 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
753 hif_dev->tx.flags |= HIF_USB_TX_FLUSH;
754 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
755
756 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
757 &hif_dev->tx.tx_pending, list) {
758 usb_kill_urb(tx_buf->urb);
759 list_del(&tx_buf->list);
760 usb_free_urb(tx_buf->urb);
761 kfree(tx_buf->buf);
762 kfree(tx_buf);
763 }
764
765 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
766 }
767
768 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev)
769 {
770 struct tx_buf *tx_buf;
771 int i;
772
773 INIT_LIST_HEAD(&hif_dev->tx.tx_buf);
774 INIT_LIST_HEAD(&hif_dev->tx.tx_pending);
775 spin_lock_init(&hif_dev->tx.tx_lock);
776 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue);
777 init_usb_anchor(&hif_dev->mgmt_submitted);
778
779 for (i = 0; i < MAX_TX_URB_NUM; i++) {
780 tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL);
781 if (!tx_buf)
782 goto err;
783
784 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL);
785 if (!tx_buf->buf)
786 goto err;
787
788 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL);
789 if (!tx_buf->urb)
790 goto err;
791
792 tx_buf->hif_dev = hif_dev;
793 __skb_queue_head_init(&tx_buf->skb_queue);
794
795 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
796 }
797
798 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM;
799
800 return 0;
801 err:
802 if (tx_buf) {
803 kfree(tx_buf->buf);
804 kfree(tx_buf);
805 }
806 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
807 return -ENOMEM;
808 }
809
810 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev)
811 {
812 usb_kill_anchored_urbs(&hif_dev->rx_submitted);
813 }
814
815 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
816 {
817 struct urb *urb = NULL;
818 struct sk_buff *skb = NULL;
819 int i, ret;
820
821 init_usb_anchor(&hif_dev->rx_submitted);
822 spin_lock_init(&hif_dev->rx_lock);
823
824 for (i = 0; i < MAX_RX_URB_NUM; i++) {
825
826 /* Allocate URB */
827 urb = usb_alloc_urb(0, GFP_KERNEL);
828 if (urb == NULL) {
829 ret = -ENOMEM;
830 goto err_urb;
831 }
832
833 /* Allocate buffer */
834 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL);
835 if (!skb) {
836 ret = -ENOMEM;
837 goto err_skb;
838 }
839
840 usb_fill_bulk_urb(urb, hif_dev->udev,
841 usb_rcvbulkpipe(hif_dev->udev,
842 USB_WLAN_RX_PIPE),
843 skb->data, MAX_RX_BUF_SIZE,
844 ath9k_hif_usb_rx_cb, skb);
845
846 /* Anchor URB */
847 usb_anchor_urb(urb, &hif_dev->rx_submitted);
848
849 /* Submit URB */
850 ret = usb_submit_urb(urb, GFP_KERNEL);
851 if (ret) {
852 usb_unanchor_urb(urb);
853 goto err_submit;
854 }
855
856 /*
857 * Drop reference count.
858 * This ensures that the URB is freed when killing them.
859 */
860 usb_free_urb(urb);
861 }
862
863 return 0;
864
865 err_submit:
866 kfree_skb(skb);
867 err_skb:
868 usb_free_urb(urb);
869 err_urb:
870 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
871 return ret;
872 }
873
874 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev)
875 {
876 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted);
877 }
878
879 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev)
880 {
881 struct urb *urb = NULL;
882 struct sk_buff *skb = NULL;
883 int i, ret;
884
885 init_usb_anchor(&hif_dev->reg_in_submitted);
886
887 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) {
888
889 /* Allocate URB */
890 urb = usb_alloc_urb(0, GFP_KERNEL);
891 if (urb == NULL) {
892 ret = -ENOMEM;
893 goto err_urb;
894 }
895
896 /* Allocate buffer */
897 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL);
898 if (!skb) {
899 ret = -ENOMEM;
900 goto err_skb;
901 }
902
903 usb_fill_bulk_urb(urb, hif_dev->udev,
904 usb_rcvbulkpipe(hif_dev->udev,
905 USB_REG_IN_PIPE),
906 skb->data, MAX_REG_IN_BUF_SIZE,
907 ath9k_hif_usb_reg_in_cb, skb);
908
909 /* Anchor URB */
910 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
911
912 /* Submit URB */
913 ret = usb_submit_urb(urb, GFP_KERNEL);
914 if (ret) {
915 usb_unanchor_urb(urb);
916 goto err_submit;
917 }
918
919 /*
920 * Drop reference count.
921 * This ensures that the URB is freed when killing them.
922 */
923 usb_free_urb(urb);
924 }
925
926 return 0;
927
928 err_submit:
929 kfree_skb(skb);
930 err_skb:
931 usb_free_urb(urb);
932 err_urb:
933 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
934 return ret;
935 }
936
937 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev)
938 {
939 /* Register Write */
940 init_usb_anchor(&hif_dev->regout_submitted);
941
942 /* TX */
943 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0)
944 goto err;
945
946 /* RX */
947 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0)
948 goto err_rx;
949
950 /* Register Read */
951 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0)
952 goto err_reg;
953
954 return 0;
955 err_reg:
956 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
957 err_rx:
958 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
959 err:
960 return -ENOMEM;
961 }
962
963 static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev)
964 {
965 usb_kill_anchored_urbs(&hif_dev->regout_submitted);
966 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
967 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
968 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
969 }
970
971 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev,
972 u32 drv_info)
973 {
974 int transfer, err;
975 const void *data = hif_dev->firmware->data;
976 size_t len = hif_dev->firmware->size;
977 u32 addr = AR9271_FIRMWARE;
978 u8 *buf = kzalloc(4096, GFP_KERNEL);
979 u32 firm_offset;
980
981 if (!buf)
982 return -ENOMEM;
983
984 while (len) {
985 transfer = min_t(int, len, 4096);
986 memcpy(buf, data, transfer);
987
988 err = usb_control_msg(hif_dev->udev,
989 usb_sndctrlpipe(hif_dev->udev, 0),
990 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT,
991 addr >> 8, 0, buf, transfer, HZ);
992 if (err < 0) {
993 kfree(buf);
994 return err;
995 }
996
997 len -= transfer;
998 data += transfer;
999 addr += transfer;
1000 }
1001 kfree(buf);
1002
1003 if (IS_AR7010_DEVICE(drv_info))
1004 firm_offset = AR7010_FIRMWARE_TEXT;
1005 else
1006 firm_offset = AR9271_FIRMWARE_TEXT;
1007
1008 /*
1009 * Issue FW download complete command to firmware.
1010 */
1011 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0),
1012 FIRMWARE_DOWNLOAD_COMP,
1013 0x40 | USB_DIR_OUT,
1014 firm_offset >> 8, 0, NULL, 0, HZ);
1015 if (err)
1016 return -EIO;
1017
1018 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n",
1019 hif_dev->fw_name, (unsigned long) hif_dev->firmware->size);
1020
1021 return 0;
1022 }
1023
1024 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev, u32 drv_info)
1025 {
1026 int ret, idx;
1027 struct usb_host_interface *alt = &hif_dev->interface->altsetting[0];
1028 struct usb_endpoint_descriptor *endp;
1029
1030 /* Request firmware */
1031 ret = request_firmware(&hif_dev->firmware, hif_dev->fw_name,
1032 &hif_dev->udev->dev);
1033 if (ret) {
1034 dev_err(&hif_dev->udev->dev,
1035 "ath9k_htc: Firmware - %s not found\n", hif_dev->fw_name);
1036 goto err_fw_req;
1037 }
1038
1039 /* Download firmware */
1040 ret = ath9k_hif_usb_download_fw(hif_dev, drv_info);
1041 if (ret) {
1042 dev_err(&hif_dev->udev->dev,
1043 "ath9k_htc: Firmware - %s download failed\n",
1044 hif_dev->fw_name);
1045 goto err_fw_download;
1046 }
1047
1048 /* On downloading the firmware to the target, the USB descriptor of EP4
1049 * is 'patched' to change the type of the endpoint to Bulk. This will
1050 * bring down CPU usage during the scan period.
1051 */
1052 for (idx = 0; idx < alt->desc.bNumEndpoints; idx++) {
1053 endp = &alt->endpoint[idx].desc;
1054 if ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1055 == USB_ENDPOINT_XFER_INT) {
1056 endp->bmAttributes &= ~USB_ENDPOINT_XFERTYPE_MASK;
1057 endp->bmAttributes |= USB_ENDPOINT_XFER_BULK;
1058 endp->bInterval = 0;
1059 }
1060 }
1061
1062 /* Alloc URBs */
1063 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1064 if (ret) {
1065 dev_err(&hif_dev->udev->dev,
1066 "ath9k_htc: Unable to allocate URBs\n");
1067 goto err_fw_download;
1068 }
1069
1070 return 0;
1071
1072 err_fw_download:
1073 release_firmware(hif_dev->firmware);
1074 err_fw_req:
1075 hif_dev->firmware = NULL;
1076 return ret;
1077 }
1078
1079 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev)
1080 {
1081 ath9k_hif_usb_dealloc_urbs(hif_dev);
1082 if (hif_dev->firmware)
1083 release_firmware(hif_dev->firmware);
1084 }
1085
1086 /*
1087 * An exact copy of the function from zd1211rw.
1088 */
1089 static int send_eject_command(struct usb_interface *interface)
1090 {
1091 struct usb_device *udev = interface_to_usbdev(interface);
1092 struct usb_host_interface *iface_desc = &interface->altsetting[0];
1093 struct usb_endpoint_descriptor *endpoint;
1094 unsigned char *cmd;
1095 u8 bulk_out_ep;
1096 int r;
1097
1098 /* Find bulk out endpoint */
1099 for (r = 1; r >= 0; r--) {
1100 endpoint = &iface_desc->endpoint[r].desc;
1101 if (usb_endpoint_dir_out(endpoint) &&
1102 usb_endpoint_xfer_bulk(endpoint)) {
1103 bulk_out_ep = endpoint->bEndpointAddress;
1104 break;
1105 }
1106 }
1107 if (r == -1) {
1108 dev_err(&udev->dev,
1109 "ath9k_htc: Could not find bulk out endpoint\n");
1110 return -ENODEV;
1111 }
1112
1113 cmd = kzalloc(31, GFP_KERNEL);
1114 if (cmd == NULL)
1115 return -ENODEV;
1116
1117 /* USB bulk command block */
1118 cmd[0] = 0x55; /* bulk command signature */
1119 cmd[1] = 0x53; /* bulk command signature */
1120 cmd[2] = 0x42; /* bulk command signature */
1121 cmd[3] = 0x43; /* bulk command signature */
1122 cmd[14] = 6; /* command length */
1123
1124 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
1125 cmd[19] = 0x2; /* eject disc */
1126
1127 dev_info(&udev->dev, "Ejecting storage device...\n");
1128 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
1129 cmd, 31, NULL, 2000);
1130 kfree(cmd);
1131 if (r)
1132 return r;
1133
1134 /* At this point, the device disconnects and reconnects with the real
1135 * ID numbers. */
1136
1137 usb_set_intfdata(interface, NULL);
1138 return 0;
1139 }
1140
1141 static int ath9k_hif_usb_probe(struct usb_interface *interface,
1142 const struct usb_device_id *id)
1143 {
1144 struct usb_device *udev = interface_to_usbdev(interface);
1145 struct hif_device_usb *hif_dev;
1146 int ret = 0;
1147
1148 if (id->driver_info == STORAGE_DEVICE)
1149 return send_eject_command(interface);
1150
1151 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL);
1152 if (!hif_dev) {
1153 ret = -ENOMEM;
1154 goto err_alloc;
1155 }
1156
1157 usb_get_dev(udev);
1158 hif_dev->udev = udev;
1159 hif_dev->interface = interface;
1160 hif_dev->device_id = id->idProduct;
1161 #ifdef CONFIG_PM
1162 udev->reset_resume = 1;
1163 #endif
1164 usb_set_intfdata(interface, hif_dev);
1165
1166 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb,
1167 &hif_dev->udev->dev);
1168 if (hif_dev->htc_handle == NULL) {
1169 ret = -ENOMEM;
1170 goto err_htc_hw_alloc;
1171 }
1172
1173 /* Find out which firmware to load */
1174
1175 if (IS_AR7010_DEVICE(id->driver_info))
1176 hif_dev->fw_name = FIRMWARE_AR7010_1_1;
1177 else
1178 hif_dev->fw_name = FIRMWARE_AR9271;
1179
1180 ret = ath9k_hif_usb_dev_init(hif_dev, id->driver_info);
1181 if (ret) {
1182 ret = -EINVAL;
1183 goto err_hif_init_usb;
1184 }
1185
1186 ret = ath9k_htc_hw_init(hif_dev->htc_handle,
1187 &interface->dev, hif_dev->device_id,
1188 hif_dev->udev->product, id->driver_info);
1189 if (ret) {
1190 ret = -EINVAL;
1191 goto err_htc_hw_init;
1192 }
1193
1194 dev_info(&hif_dev->udev->dev, "ath9k_htc: USB layer initialized\n");
1195
1196 return 0;
1197
1198 err_htc_hw_init:
1199 ath9k_hif_usb_dev_deinit(hif_dev);
1200 err_hif_init_usb:
1201 ath9k_htc_hw_free(hif_dev->htc_handle);
1202 err_htc_hw_alloc:
1203 usb_set_intfdata(interface, NULL);
1204 kfree(hif_dev);
1205 usb_put_dev(udev);
1206 err_alloc:
1207 return ret;
1208 }
1209
1210 static void ath9k_hif_usb_reboot(struct usb_device *udev)
1211 {
1212 u32 reboot_cmd = 0xffffffff;
1213 void *buf;
1214 int ret;
1215
1216 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL);
1217 if (!buf)
1218 return;
1219
1220 ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, USB_REG_OUT_PIPE),
1221 buf, 4, NULL, HZ);
1222 if (ret)
1223 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
1224
1225 kfree(buf);
1226 }
1227
1228 static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
1229 {
1230 struct usb_device *udev = interface_to_usbdev(interface);
1231 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1232 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false;
1233
1234 if (!hif_dev)
1235 return;
1236
1237 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged);
1238 ath9k_htc_hw_free(hif_dev->htc_handle);
1239 ath9k_hif_usb_dev_deinit(hif_dev);
1240 usb_set_intfdata(interface, NULL);
1241
1242 if (!unplugged && (hif_dev->flags & HIF_USB_START))
1243 ath9k_hif_usb_reboot(udev);
1244
1245 kfree(hif_dev);
1246 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");
1247 usb_put_dev(udev);
1248 }
1249
1250 #ifdef CONFIG_PM
1251 static int ath9k_hif_usb_suspend(struct usb_interface *interface,
1252 pm_message_t message)
1253 {
1254 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1255
1256 /*
1257 * The device has to be set to FULLSLEEP mode in case no
1258 * interface is up.
1259 */
1260 if (!(hif_dev->flags & HIF_USB_START))
1261 ath9k_htc_suspend(hif_dev->htc_handle);
1262
1263 ath9k_hif_usb_dealloc_urbs(hif_dev);
1264
1265 return 0;
1266 }
1267
1268 static int ath9k_hif_usb_resume(struct usb_interface *interface)
1269 {
1270 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1271 struct htc_target *htc_handle = hif_dev->htc_handle;
1272 int ret;
1273
1274 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1275 if (ret)
1276 return ret;
1277
1278 if (hif_dev->firmware) {
1279 ret = ath9k_hif_usb_download_fw(hif_dev,
1280 htc_handle->drv_priv->ah->hw_version.usbdev);
1281 if (ret)
1282 goto fail_resume;
1283 } else {
1284 ath9k_hif_usb_dealloc_urbs(hif_dev);
1285 return -EIO;
1286 }
1287
1288 mdelay(100);
1289
1290 ret = ath9k_htc_resume(htc_handle);
1291
1292 if (ret)
1293 goto fail_resume;
1294
1295 return 0;
1296
1297 fail_resume:
1298 ath9k_hif_usb_dealloc_urbs(hif_dev);
1299
1300 return ret;
1301 }
1302 #endif
1303
1304 static struct usb_driver ath9k_hif_usb_driver = {
1305 .name = KBUILD_MODNAME,
1306 .probe = ath9k_hif_usb_probe,
1307 .disconnect = ath9k_hif_usb_disconnect,
1308 #ifdef CONFIG_PM
1309 .suspend = ath9k_hif_usb_suspend,
1310 .resume = ath9k_hif_usb_resume,
1311 .reset_resume = ath9k_hif_usb_resume,
1312 #endif
1313 .id_table = ath9k_hif_usb_ids,
1314 .soft_unbind = 1,
1315 };
1316
1317 int ath9k_hif_usb_init(void)
1318 {
1319 return usb_register(&ath9k_hif_usb_driver);
1320 }
1321
1322 void ath9k_hif_usb_exit(void)
1323 {
1324 usb_deregister(&ath9k_hif_usb_driver);
1325 }