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ath9k_htc: Fix watchdog pattern parsing
[net-next-2.6.git] / drivers / net / wireless / ath / ath9k / hif_usb.c
CommitLineData
fb9987d0
S		 1/*
2 * Copyright (c) 2010 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 "htc.h"
18
19#define ATH9K_FW_USB_DEV(devid, fw) \
20 { USB_DEVICE(0x0cf3, devid), .driver_info = (unsigned long) fw }
21
22static struct usb_device_id ath9k_hif_usb_ids[] = {
23 ATH9K_FW_USB_DEV(0x9271, "ar9271.fw"),
24 { },
25};
26
27MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids);
28
29static int __hif_usb_tx(struct hif_device_usb *hif_dev);
30
31static void hif_usb_regout_cb(struct urb *urb)
32{
33 struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
34 struct hif_device_usb *hif_dev = cmd->hif_dev;
35
36 if (!hif_dev) {
37 usb_free_urb(urb);
38 if (cmd) {
39 if (cmd->skb)
40 dev_kfree_skb_any(cmd->skb);
41 kfree(cmd);
42 }
43 return;
44 }
45
46 switch (urb->status) {
47 case 0:
48 break;
49 case -ENOENT:
50 case -ECONNRESET:
51 break;
52 case -ENODEV:
53 case -ESHUTDOWN:
54 return;
55 default:
56 break;
57 }
58
59 if (cmd) {
60 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
61 cmd->skb, 1);
62 kfree(cmd);
63 usb_free_urb(urb);
64 }
65}
66
67static int hif_usb_send_regout(struct hif_device_usb *hif_dev,
68 struct sk_buff *skb)
69{
70 struct urb *urb;
71 struct cmd_buf *cmd;
72 int ret = 0;
73
74 urb = usb_alloc_urb(0, GFP_KERNEL);
75 if (urb == NULL)
76 return -ENOMEM;
77
78 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
79 if (cmd == NULL) {
80 usb_free_urb(urb);
81 return -ENOMEM;
82 }
83
84 cmd->skb = skb;
85 cmd->hif_dev = hif_dev;
86
87 usb_fill_int_urb(urb, hif_dev->udev,
88 usb_sndintpipe(hif_dev->udev, USB_REG_OUT_PIPE),
89 skb->data, skb->len,
90 hif_usb_regout_cb, cmd, 1);
91
92 ret = usb_submit_urb(urb, GFP_KERNEL);
93 if (ret) {
94 usb_free_urb(urb);
95 kfree(cmd);
96 }
97
98 return ret;
99}
100
101static void hif_usb_tx_cb(struct urb *urb)
102{
103 struct tx_buf *tx_buf = (struct tx_buf *) urb->context;
104 struct hif_device_usb *hif_dev = tx_buf->hif_dev;
105 struct sk_buff *skb;
106 bool drop, flush;
107
108 if (!hif_dev)
109 return;
110
111 switch (urb->status) {
112 case 0:
113 break;
114 case -ENOENT:
115 case -ECONNRESET:
116 break;
117 case -ENODEV:
118 case -ESHUTDOWN:
119 return;
120 default:
121 break;
122 }
123
124 if (tx_buf) {
125 spin_lock(&hif_dev->tx.tx_lock);
126 drop = !!(hif_dev->tx.flags & HIF_USB_TX_STOP);
127 flush = !!(hif_dev->tx.flags & HIF_USB_TX_FLUSH);
128 spin_unlock(&hif_dev->tx.tx_lock);
129
130 while ((skb = __skb_dequeue(&tx_buf->skb_queue)) != NULL) {
131 if (!drop && !flush) {
132 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
133 skb, 1);
134 TX_STAT_INC(skb_completed);
135 } else {
136 dev_kfree_skb_any(skb);
137 }
138 }
139
140 if (flush)
141 return;
142
143 tx_buf->len = tx_buf->offset = 0;
144 __skb_queue_head_init(&tx_buf->skb_queue);
145
146 spin_lock(&hif_dev->tx.tx_lock);
147 list_del(&tx_buf->list);
148 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
149 hif_dev->tx.tx_buf_cnt++;
150 if (!drop)
151 __hif_usb_tx(hif_dev); /* Check for pending SKBs */
152 TX_STAT_INC(buf_completed);
153 spin_unlock(&hif_dev->tx.tx_lock);
154 }
155}
156
157/* TX lock has to be taken */
158static int __hif_usb_tx(struct hif_device_usb *hif_dev)
159{
160 struct tx_buf *tx_buf = NULL;
161 struct sk_buff *nskb = NULL;
162 int ret = 0, i;
163 u16 *hdr, tx_skb_cnt = 0;
164 u8 *buf;
165
166 if (hif_dev->tx.tx_skb_cnt == 0)
167 return 0;
168
169 /* Check if a free TX buffer is available */
170 if (list_empty(&hif_dev->tx.tx_buf))
171 return 0;
172
173 tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list);
174 list_del(&tx_buf->list);
175 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_pending);
176 hif_dev->tx.tx_buf_cnt--;
177
178 tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM);
179
180 for (i = 0; i < tx_skb_cnt; i++) {
181 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue);
182
183 /* Should never be NULL */
184 BUG_ON(!nskb);
185
186 hif_dev->tx.tx_skb_cnt--;
187
188 buf = tx_buf->buf;
189 buf += tx_buf->offset;
190 hdr = (u16 *)buf;
191 *hdr++ = nskb->len;
192 *hdr++ = ATH_USB_TX_STREAM_MODE_TAG;
193 buf += 4;
194 memcpy(buf, nskb->data, nskb->len);
195 tx_buf->len = nskb->len + 4;
196
197 if (i < (tx_skb_cnt - 1))
198 tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4;
199
200 if (i == (tx_skb_cnt - 1))
201 tx_buf->len += tx_buf->offset;
202
203 __skb_queue_tail(&tx_buf->skb_queue, nskb);
204 TX_STAT_INC(skb_queued);
205 }
206
207 usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev,
208 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
209 tx_buf->buf, tx_buf->len,
210 hif_usb_tx_cb, tx_buf);
211
212 ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC);
213 if (ret) {
214 tx_buf->len = tx_buf->offset = 0;
215 __skb_queue_purge(&tx_buf->skb_queue);
216 __skb_queue_head_init(&tx_buf->skb_queue);
217 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
218 hif_dev->tx.tx_buf_cnt++;
219 }
220
221 if (!ret)
222 TX_STAT_INC(buf_queued);
223
224 return ret;
225}
226
227static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb,
228 struct ath9k_htc_tx_ctl *tx_ctl)
229{
230 unsigned long flags;
231
232 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
233
234 if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
235 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
236 return -ENODEV;
237 }
238
239 /* Check if the max queue count has been reached */
240 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) {
241 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
242 return -ENOMEM;
243 }
244
245 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb);
246 hif_dev->tx.tx_skb_cnt++;
247
248 /* Send normal frames immediately */
249 if (!tx_ctl || (tx_ctl && (tx_ctl->type == ATH9K_HTC_NORMAL)))
250 __hif_usb_tx(hif_dev);
251
252 /* Check if AMPDUs have to be sent immediately */
253 if (tx_ctl && (tx_ctl->type == ATH9K_HTC_AMPDU) &&
254 (hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) &&
255 (hif_dev->tx.tx_skb_cnt < 2)) {
256 __hif_usb_tx(hif_dev);
257 }
258
259 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
260
261 return 0;
262}
263
264static void hif_usb_start(void *hif_handle, u8 pipe_id)
265{
266 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
267 unsigned long flags;
268
269 hif_dev->flags |= HIF_USB_START;
270
271 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
272 hif_dev->tx.flags &= ~HIF_USB_TX_STOP;
273 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
274}
275
276static void hif_usb_stop(void *hif_handle, u8 pipe_id)
277{
278 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
279 unsigned long flags;
280
281 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
282 __skb_queue_purge(&hif_dev->tx.tx_skb_queue);
283 hif_dev->tx.tx_skb_cnt = 0;
284 hif_dev->tx.flags |= HIF_USB_TX_STOP;
285 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
286}
287
288static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb,
289 struct ath9k_htc_tx_ctl *tx_ctl)
290{
291 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
292 int ret = 0;
293
294 switch (pipe_id) {
295 case USB_WLAN_TX_PIPE:
296 ret = hif_usb_send_tx(hif_dev, skb, tx_ctl);
297 break;
298 case USB_REG_OUT_PIPE:
299 ret = hif_usb_send_regout(hif_dev, skb);
300 break;
301 default:
302 ret = -EINVAL;
303 break;
304 }
305
306 return ret;
307}
308
309static struct ath9k_htc_hif hif_usb = {
310 .transport = ATH9K_HIF_USB,
311 .name = "ath9k_hif_usb",
312
313 .control_ul_pipe = USB_REG_OUT_PIPE,
314 .control_dl_pipe = USB_REG_IN_PIPE,
315
316 .start = hif_usb_start,
317 .stop = hif_usb_stop,
318 .send = hif_usb_send,
319};
320
321static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev,
322 struct sk_buff *skb)
323{
324 struct sk_buff *nskb, *skb_pool[8];
325 int index = 0, i = 0, chk_idx, len = skb->len;
326 int rx_remain_len = 0, rx_pkt_len = 0;
327 u16 pkt_len, pkt_tag, pool_index = 0;
328 u8 *ptr;
329
330 rx_remain_len = hif_dev->rx_remain_len;
331 rx_pkt_len = hif_dev->rx_transfer_len;
332
333 if (rx_remain_len != 0) {
334 struct sk_buff *remain_skb = hif_dev->remain_skb;
335
336 if (remain_skb) {
337 ptr = (u8 *) remain_skb->data;
338
339 index = rx_remain_len;
340 rx_remain_len -= hif_dev->rx_pad_len;
341 ptr += rx_pkt_len;
342
343 memcpy(ptr, skb->data, rx_remain_len);
344
345 rx_pkt_len += rx_remain_len;
346 hif_dev->rx_remain_len = 0;
347 skb_put(remain_skb, rx_pkt_len);
348
349 skb_pool[pool_index++] = remain_skb;
350
351 } else {
352 index = rx_remain_len;
353 }
354 }
355
356 while (index < len) {
357 ptr = (u8 *) skb->data;
358
359 pkt_len = ptr[index] + (ptr[index+1] << 8);
360 pkt_tag = ptr[index+2] + (ptr[index+3] << 8);
361
362 if (pkt_tag == ATH_USB_RX_STREAM_MODE_TAG) {
363 u16 pad_len;
364
365 pad_len = 4 - (pkt_len & 0x3);
366 if (pad_len == 4)
367 pad_len = 0;
368
369 chk_idx = index;
370 index = index + 4 + pkt_len + pad_len;
371
372 if (index > MAX_RX_BUF_SIZE) {
373 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE;
374 hif_dev->rx_transfer_len =
375 MAX_RX_BUF_SIZE - chk_idx - 4;
376 hif_dev->rx_pad_len = pad_len;
377
378 nskb = __dev_alloc_skb(pkt_len + 32,
379 GFP_ATOMIC);
380 if (!nskb) {
381 dev_err(&hif_dev->udev->dev,
382 "ath9k_htc: RX memory allocation"
383 " error\n");
384 goto err;
385 }
386 skb_reserve(nskb, 32);
387 RX_STAT_INC(skb_allocated);
388
389 memcpy(nskb->data, &(skb->data[chk_idx+4]),
390 hif_dev->rx_transfer_len);
391
392 /* Record the buffer pointer */
393 hif_dev->remain_skb = nskb;
394 } else {
395 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
396 if (!nskb) {
397 dev_err(&hif_dev->udev->dev,
398 "ath9k_htc: RX memory allocation"
399 " error\n");
400 goto err;
401 }
402 skb_reserve(nskb, 32);
403 RX_STAT_INC(skb_allocated);
404
405 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len);
406 skb_put(nskb, pkt_len);
407 skb_pool[pool_index++] = nskb;
408 }
409 } else {
410 RX_STAT_INC(skb_dropped);
411 dev_kfree_skb_any(skb);
412 return;
413 }
414 }
415
416err:
417 dev_kfree_skb_any(skb);
418
419 for (i = 0; i < pool_index; i++) {
420 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i],
421 skb_pool[i]->len, USB_WLAN_RX_PIPE);
422 RX_STAT_INC(skb_completed);
423 }
424}
425
426static void ath9k_hif_usb_rx_cb(struct urb *urb)
427{
428 struct sk_buff *skb = (struct sk_buff *) urb->context;
429 struct sk_buff *nskb;
430 struct hif_device_usb *hif_dev = (struct hif_device_usb *)
431 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
432 int ret;
433
434 if (!hif_dev)
435 goto free;
436
437 switch (urb->status) {
438 case 0:
439 break;
440 case -ENOENT:
441 case -ECONNRESET:
442 case -ENODEV:
443 case -ESHUTDOWN:
444 goto free;
445 default:
446 goto resubmit;
447 }
448
449 if (likely(urb->actual_length != 0)) {
450 skb_put(skb, urb->actual_length);
451
452 nskb = __dev_alloc_skb(MAX_RX_BUF_SIZE, GFP_ATOMIC);
453 if (!nskb)
454 goto resubmit;
455
456 usb_fill_bulk_urb(urb, hif_dev->udev,
457 usb_rcvbulkpipe(hif_dev->udev,
458 USB_WLAN_RX_PIPE),
459 nskb->data, MAX_RX_BUF_SIZE,
460 ath9k_hif_usb_rx_cb, nskb);
461
462 ret = usb_submit_urb(urb, GFP_ATOMIC);
463 if (ret) {
464 dev_kfree_skb_any(nskb);
465 goto free;
466 }
467
468 ath9k_hif_usb_rx_stream(hif_dev, skb);
469 return;
470 }
471
472resubmit:
473 skb_reset_tail_pointer(skb);
474 skb_trim(skb, 0);
475
476 ret = usb_submit_urb(urb, GFP_ATOMIC);
477 if (ret)
478 goto free;
479
480 return;
481free:
482 dev_kfree_skb_any(skb);
483}
484
485static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
486{
487 struct sk_buff *skb = (struct sk_buff *) urb->context;
488 struct sk_buff *nskb;
489 struct hif_device_usb *hif_dev = (struct hif_device_usb *)
490 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
491 int ret;
492
493 if (!hif_dev)
494 goto free;
495
496 switch (urb->status) {
497 case 0:
498 break;
499 case -ENOENT:
500 case -ECONNRESET:
501 case -ENODEV:
502 case -ESHUTDOWN:
503 goto free;
504 default:
505 goto resubmit;
506 }
507
508 if (likely(urb->actual_length != 0)) {
509 skb_put(skb, urb->actual_length);
510
511 nskb = __dev_alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC);
512 if (!nskb)
513 goto resubmit;
514
515 usb_fill_int_urb(urb, hif_dev->udev,
516 usb_rcvintpipe(hif_dev->udev, USB_REG_IN_PIPE),
517 nskb->data, MAX_REG_IN_BUF_SIZE,
518 ath9k_hif_usb_reg_in_cb, nskb, 1);
519
520 ret = usb_submit_urb(urb, GFP_ATOMIC);
521 if (ret) {
522 dev_kfree_skb_any(nskb);
523 goto free;
524 }
525
526 ath9k_htc_rx_msg(hif_dev->htc_handle, skb,
527 skb->len, USB_REG_IN_PIPE);
528
529 return;
530 }
531
532resubmit:
533 skb_reset_tail_pointer(skb);
534 skb_trim(skb, 0);
535
536 ret = usb_submit_urb(urb, GFP_ATOMIC);
537 if (ret)
538 goto free;
539
540 return;
541free:
542 dev_kfree_skb_any(skb);
543}
544
545static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
546{
547 unsigned long flags;
548 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
549
550 list_for_each_entry_safe(tx_buf, tx_buf_tmp, &hif_dev->tx.tx_buf, list) {
551 list_del(&tx_buf->list);
552 usb_free_urb(tx_buf->urb);
553 kfree(tx_buf->buf);
554 kfree(tx_buf);
555 }
556
557 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
558 hif_dev->tx.flags |= HIF_USB_TX_FLUSH;
559 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
560
561 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
562 &hif_dev->tx.tx_pending, list) {
563 usb_kill_urb(tx_buf->urb);
564 list_del(&tx_buf->list);
565 usb_free_urb(tx_buf->urb);
566 kfree(tx_buf->buf);
567 kfree(tx_buf);
568 }
569
570 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
571 hif_dev->tx.flags &= ~HIF_USB_TX_FLUSH;
572 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
573}
574
575static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev)
576{
577 struct tx_buf *tx_buf;
578 int i;
579
580 INIT_LIST_HEAD(&hif_dev->tx.tx_buf);
581 INIT_LIST_HEAD(&hif_dev->tx.tx_pending);
582 spin_lock_init(&hif_dev->tx.tx_lock);
583 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue);
584
585 for (i = 0; i < MAX_TX_URB_NUM; i++) {
586 tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL);
587 if (!tx_buf)
588 goto err;
589
590 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL);
591 if (!tx_buf->buf)
592 goto err;
593
594 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL);
595 if (!tx_buf->urb)
596 goto err;
597
598 tx_buf->hif_dev = hif_dev;
599 __skb_queue_head_init(&tx_buf->skb_queue);
600
601 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
602 }
603
604 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM;
605
606 return 0;
607err:
608 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
609 return -ENOMEM;
610}
611
612static void ath9k_hif_usb_dealloc_rx_skbs(struct hif_device_usb *hif_dev)
613{
614 int i;
615
616 for (i = 0; i < MAX_RX_URB_NUM; i++) {
617 if (hif_dev->wlan_rx_data_urb[i]) {
618 if (hif_dev->wlan_rx_data_urb[i]->transfer_buffer)
619 dev_kfree_skb_any((void *)
620 hif_dev->wlan_rx_data_urb[i]->context);
621 }
622 }
623}
624
625static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev)
626{
627 int i;
628
629 for (i = 0; i < MAX_RX_URB_NUM; i++) {
630 if (hif_dev->wlan_rx_data_urb[i]) {
631 usb_kill_urb(hif_dev->wlan_rx_data_urb[i]);
632 usb_free_urb(hif_dev->wlan_rx_data_urb[i]);
633 hif_dev->wlan_rx_data_urb[i] = NULL;
634 }
635 }
636}
637
638static int ath9k_hif_usb_prep_rx_urb(struct hif_device_usb *hif_dev,
639 struct urb *urb)
640{
641 struct sk_buff *skb;
642
643 skb = __dev_alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL);
644 if (!skb)
645 return -ENOMEM;
646
647 usb_fill_bulk_urb(urb, hif_dev->udev,
648 usb_rcvbulkpipe(hif_dev->udev, USB_WLAN_RX_PIPE),
649 skb->data, MAX_RX_BUF_SIZE,
650 ath9k_hif_usb_rx_cb, skb);
651 return 0;
652}
653
654static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
655{
656 int i, ret;
657
658 for (i = 0; i < MAX_RX_URB_NUM; i++) {
659
660 /* Allocate URB */
661 hif_dev->wlan_rx_data_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
662 if (hif_dev->wlan_rx_data_urb[i] == NULL) {
663 ret = -ENOMEM;
664 goto err_rx_urb;
665 }
666
667 /* Allocate buffer */
668 ret = ath9k_hif_usb_prep_rx_urb(hif_dev,
669 hif_dev->wlan_rx_data_urb[i]);
670 if (ret)
671 goto err_rx_urb;
672
673 /* Submit URB */
674 ret = usb_submit_urb(hif_dev->wlan_rx_data_urb[i], GFP_KERNEL);
675 if (ret)
676 goto err_rx_urb;
677
678 }
679
680 return 0;
681
682err_rx_urb:
683 ath9k_hif_usb_dealloc_rx_skbs(hif_dev);
684 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
685 return ret;
686}
687
688static void ath9k_hif_usb_dealloc_reg_in_urb(struct hif_device_usb *hif_dev)
689{
690 if (hif_dev->reg_in_urb) {
691 usb_kill_urb(hif_dev->reg_in_urb);
692 usb_free_urb(hif_dev->reg_in_urb);
693 hif_dev->reg_in_urb = NULL;
694 }
695}
696
697static int ath9k_hif_usb_alloc_reg_in_urb(struct hif_device_usb *hif_dev)
698{
699 struct sk_buff *skb;
700
701 hif_dev->reg_in_urb = usb_alloc_urb(0, GFP_KERNEL);
702 if (hif_dev->reg_in_urb == NULL)
703 return -ENOMEM;
704
705 skb = __dev_alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL);
706 if (!skb)
707 goto err;
708
709 usb_fill_int_urb(hif_dev->reg_in_urb, hif_dev->udev,
710 usb_rcvintpipe(hif_dev->udev, USB_REG_IN_PIPE),
711 skb->data, MAX_REG_IN_BUF_SIZE,
712 ath9k_hif_usb_reg_in_cb, skb, 1);
713
714 if (usb_submit_urb(hif_dev->reg_in_urb, GFP_KERNEL) != 0)
715 goto err_skb;
716
717 return 0;
718
719err_skb:
720 dev_kfree_skb_any(skb);
721err:
722 ath9k_hif_usb_dealloc_reg_in_urb(hif_dev);
723 return -ENOMEM;
724}
725
726static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev)
727{
728 /* TX */
729 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0)
730 goto err;
731
732 /* RX */
733 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0)
734 goto err;
735
736 /* Register Read/Write */
737 if (ath9k_hif_usb_alloc_reg_in_urb(hif_dev) < 0)
738 goto err;
739
740 return 0;
741err:
742 return -ENOMEM;
743}
744
745static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev)
746{
747 int transfer, err;
748 const void *data = hif_dev->firmware->data;
749 size_t len = hif_dev->firmware->size;
750 u32 addr = AR9271_FIRMWARE;
751 u8 *buf = kzalloc(4096, GFP_KERNEL);
752
753 if (!buf)
754 return -ENOMEM;
755
756 while (len) {
757 transfer = min_t(int, len, 4096);
758 memcpy(buf, data, transfer);
759
760 err = usb_control_msg(hif_dev->udev,
761 usb_sndctrlpipe(hif_dev->udev, 0),
762 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT,
763 addr >> 8, 0, buf, transfer, HZ);
764 if (err < 0) {
765 kfree(buf);
766 return err;
767 }
768
769 len -= transfer;
770 data += transfer;
771 addr += transfer;
772 }
773 kfree(buf);
774
775 /*
776 * Issue FW download complete command to firmware.
777 */
778 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0),
779 FIRMWARE_DOWNLOAD_COMP,
780 0x40 | USB_DIR_OUT,
781 AR9271_FIRMWARE_TEXT >> 8, 0, NULL, 0, HZ);
782 if (err)
783 return -EIO;
784
785 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n",
786 "ar9271.fw", (unsigned long) hif_dev->firmware->size);
787
788 return 0;
789}
790
791static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev,
792 const char *fw_name)
793{
794 int ret;
795
796 /* Request firmware */
797 ret = request_firmware(&hif_dev->firmware, fw_name, &hif_dev->udev->dev);
798 if (ret) {
799 dev_err(&hif_dev->udev->dev,
800 "ath9k_htc: Firmware - %s not found\n", fw_name);
801 goto err_fw_req;
802 }
803
804 /* Download firmware */
805 ret = ath9k_hif_usb_download_fw(hif_dev);
806 if (ret) {
807 dev_err(&hif_dev->udev->dev,
808 "ath9k_htc: Firmware - %s download failed\n", fw_name);
809 goto err_fw_download;
810 }
811
812 /* Alloc URBs */
813 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
814 if (ret) {
815 dev_err(&hif_dev->udev->dev,
816 "ath9k_htc: Unable to allocate URBs\n");
817 goto err_urb;
818 }
819
820 return 0;
821
822err_urb:
823 /* Nothing */
824err_fw_download:
825 release_firmware(hif_dev->firmware);
826err_fw_req:
827 hif_dev->firmware = NULL;
828 return ret;
829}
830
831static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev)
832{
833 ath9k_hif_usb_dealloc_reg_in_urb(hif_dev);
834 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
835 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
836}
837
838static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev)
839{
840 ath9k_hif_usb_dealloc_urbs(hif_dev);
841 if (hif_dev->firmware)
842 release_firmware(hif_dev->firmware);
843}
844
845static int ath9k_hif_usb_probe(struct usb_interface *interface,
846 const struct usb_device_id *id)
847{
848 struct usb_device *udev = interface_to_usbdev(interface);
849 struct hif_device_usb *hif_dev;
850 const char *fw_name = (const char *) id->driver_info;
851 int ret = 0;
852
853 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL);
854 if (!hif_dev) {
855 ret = -ENOMEM;
856 goto err_alloc;
857 }
858
859 usb_get_dev(udev);
860 hif_dev->udev = udev;
861 hif_dev->interface = interface;
862 hif_dev->device_id = id->idProduct;
863#ifdef CONFIG_PM
864 udev->reset_resume = 1;
865#endif
866 usb_set_intfdata(interface, hif_dev);
867
868 ret = ath9k_hif_usb_dev_init(hif_dev, fw_name);
869 if (ret) {
870 ret = -EINVAL;
871 goto err_hif_init_usb;
872 }
873
874 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev);
875 if (hif_dev->htc_handle == NULL) {
876 ret = -ENOMEM;
877 goto err_htc_hw_alloc;
878 }
879
880 ret = ath9k_htc_hw_init(&hif_usb, hif_dev->htc_handle, hif_dev,
881 &hif_dev->udev->dev, hif_dev->device_id,
882 ATH9K_HIF_USB);
883 if (ret) {
884 ret = -EINVAL;
885 goto err_htc_hw_init;
886 }
887
888 dev_info(&hif_dev->udev->dev, "ath9k_htc: USB layer initialized\n");
889
890 return 0;
891
892err_htc_hw_init:
893 ath9k_htc_hw_free(hif_dev->htc_handle);
894err_htc_hw_alloc:
895 ath9k_hif_usb_dev_deinit(hif_dev);
896err_hif_init_usb:
897 usb_set_intfdata(interface, NULL);
898 kfree(hif_dev);
899 usb_put_dev(udev);
900err_alloc:
901 return ret;
902}
903
904static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
905{
906 struct usb_device *udev = interface_to_usbdev(interface);
907 struct hif_device_usb *hif_dev =
908 (struct hif_device_usb *) usb_get_intfdata(interface);
909
910 if (hif_dev) {
911 ath9k_htc_hw_deinit(hif_dev->htc_handle, true);
912 ath9k_htc_hw_free(hif_dev->htc_handle);
913 ath9k_hif_usb_dev_deinit(hif_dev);
914 usb_set_intfdata(interface, NULL);
915 }
916
917 if (hif_dev->flags & HIF_USB_START)
918 usb_reset_device(udev);
919
920 kfree(hif_dev);
921 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");
922 usb_put_dev(udev);
923}
924
925#ifdef CONFIG_PM
926static int ath9k_hif_usb_suspend(struct usb_interface *interface,
927 pm_message_t message)
928{
929 struct hif_device_usb *hif_dev =
930 (struct hif_device_usb *) usb_get_intfdata(interface);
931
932 ath9k_hif_usb_dealloc_urbs(hif_dev);
933
934 return 0;
935}
936
937static int ath9k_hif_usb_resume(struct usb_interface *interface)
938{
939 struct hif_device_usb *hif_dev =
940 (struct hif_device_usb *) usb_get_intfdata(interface);
941 int ret;
942
943 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
944 if (ret)
945 return ret;
946
947 if (hif_dev->firmware) {
948 ret = ath9k_hif_usb_download_fw(hif_dev);
949 if (ret)
950 goto fail_resume;
951 } else {
952 ath9k_hif_usb_dealloc_urbs(hif_dev);
953 return -EIO;
954 }
955
956 mdelay(100);
957
958 ret = ath9k_htc_resume(hif_dev->htc_handle);
959
960 if (ret)
961 goto fail_resume;
962
963 return 0;
964
965fail_resume:
966 ath9k_hif_usb_dealloc_urbs(hif_dev);
967
968 return ret;
969}
970#endif
971
972static struct usb_driver ath9k_hif_usb_driver = {
973 .name = "ath9k_hif_usb",
974 .probe = ath9k_hif_usb_probe,
975 .disconnect = ath9k_hif_usb_disconnect,
976#ifdef CONFIG_PM
977 .suspend = ath9k_hif_usb_suspend,
978 .resume = ath9k_hif_usb_resume,
979 .reset_resume = ath9k_hif_usb_resume,
980#endif
981 .id_table = ath9k_hif_usb_ids,
982 .soft_unbind = 1,
983};
984
985int ath9k_hif_usb_init(void)
986{
987 return usb_register(&ath9k_hif_usb_driver);
988}
989
990void ath9k_hif_usb_exit(void)
991{
992 usb_deregister(&ath9k_hif_usb_driver);
993}
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