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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
24MODULE_FIRMWARE(FIRMWARE_AR7010_1_1);
25MODULE_FIRMWARE(FIRMWARE_AR9271);
26
27static 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
42 { USB_DEVICE(0x0cf3, 0x7015),
43 .driver_info = AR9287_USB }, /* Atheros */
44 { USB_DEVICE(0x1668, 0x1200),
45 .driver_info = AR9287_USB }, /* Verizon */
46
47 { USB_DEVICE(0x0cf3, 0x7010),
48 .driver_info = AR9280_USB }, /* Atheros */
49 { USB_DEVICE(0x0846, 0x9018),
50 .driver_info = AR9280_USB }, /* Netgear WNDA3200 */
51 { USB_DEVICE(0x083A, 0xA704),
52 .driver_info = AR9280_USB }, /* SMC Networks */
53 { USB_DEVICE(0x0411, 0x017f),
54 .driver_info = AR9280_USB }, /* Sony UWA-BR100 */
55
56 { USB_DEVICE(0x0cf3, 0x20ff),
57 .driver_info = STORAGE_DEVICE },
58
59 { },
60};
61
62MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids);
63
64static int __hif_usb_tx(struct hif_device_usb *hif_dev);
65
66static void hif_usb_regout_cb(struct urb *urb)
67{
68 struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
69
70 switch (urb->status) {
71 case 0:
72 break;
73 case -ENOENT:
74 case -ECONNRESET:
75 case -ENODEV:
76 case -ESHUTDOWN:
77 goto free;
78 default:
79 break;
80 }
81
82 if (cmd) {
83 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
84 cmd->skb, true);
85 kfree(cmd);
86 }
87
88 return;
89free:
90 kfree_skb(cmd->skb);
91 kfree(cmd);
92}
93
94static int hif_usb_send_regout(struct hif_device_usb *hif_dev,
95 struct sk_buff *skb)
96{
97 struct urb *urb;
98 struct cmd_buf *cmd;
99 int ret = 0;
100
101 urb = usb_alloc_urb(0, GFP_KERNEL);
102 if (urb == NULL)
103 return -ENOMEM;
104
105 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
106 if (cmd == NULL) {
107 usb_free_urb(urb);
108 return -ENOMEM;
109 }
110
111 cmd->skb = skb;
112 cmd->hif_dev = hif_dev;
113
114 usb_fill_bulk_urb(urb, hif_dev->udev,
115 usb_sndbulkpipe(hif_dev->udev, USB_REG_OUT_PIPE),
116 skb->data, skb->len,
117 hif_usb_regout_cb, cmd);
118
119 usb_anchor_urb(urb, &hif_dev->regout_submitted);
120 ret = usb_submit_urb(urb, GFP_KERNEL);
121 if (ret) {
122 usb_unanchor_urb(urb);
123 kfree(cmd);
124 }
125 usb_free_urb(urb);
126
127 return ret;
128}
129
130static void hif_usb_mgmt_cb(struct urb *urb)
131{
132 struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
133 struct hif_device_usb *hif_dev;
134 bool txok = true;
135
136 if (!cmd || !cmd->skb || !cmd->hif_dev)
137 return;
138
139 hif_dev = cmd->hif_dev;
140
141 switch (urb->status) {
142 case 0:
143 break;
144 case -ENOENT:
145 case -ECONNRESET:
146 case -ENODEV:
147 case -ESHUTDOWN:
148 txok = false;
149
150 /*
151 * If the URBs are being flushed, no need to complete
152 * this packet.
153 */
154 spin_lock(&hif_dev->tx.tx_lock);
155 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) {
156 spin_unlock(&hif_dev->tx.tx_lock);
157 dev_kfree_skb_any(cmd->skb);
158 kfree(cmd);
159 return;
160 }
161 spin_unlock(&hif_dev->tx.tx_lock);
162
163 break;
164 default:
165 txok = false;
166 break;
167 }
168
169 skb_pull(cmd->skb, 4);
170 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
171 cmd->skb, txok);
172 kfree(cmd);
173}
174
175static int hif_usb_send_mgmt(struct hif_device_usb *hif_dev,
176 struct sk_buff *skb)
177{
178 struct urb *urb;
179 struct cmd_buf *cmd;
180 int ret = 0;
181 __le16 *hdr;
182
183 urb = usb_alloc_urb(0, GFP_ATOMIC);
184 if (urb == NULL)
185 return -ENOMEM;
186
187 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
188 if (cmd == NULL) {
189 usb_free_urb(urb);
190 return -ENOMEM;
191 }
192
193 cmd->skb = skb;
194 cmd->hif_dev = hif_dev;
195
196 hdr = (__le16 *) skb_push(skb, 4);
197 *hdr++ = cpu_to_le16(skb->len - 4);
198 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG);
199
200 usb_fill_bulk_urb(urb, hif_dev->udev,
201 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
202 skb->data, skb->len,
203 hif_usb_mgmt_cb, cmd);
204
205 usb_anchor_urb(urb, &hif_dev->mgmt_submitted);
206 ret = usb_submit_urb(urb, GFP_ATOMIC);
207 if (ret) {
208 usb_unanchor_urb(urb);
209 kfree(cmd);
210 }
211 usb_free_urb(urb);
212
213 return ret;
214}
215
216static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev,
217 struct sk_buff_head *list)
218{
219 struct sk_buff *skb;
220
221 while ((skb = __skb_dequeue(list)) != NULL) {
222 dev_kfree_skb_any(skb);
223 }
224}
225
226static inline void ath9k_skb_queue_complete(struct hif_device_usb *hif_dev,
227 struct sk_buff_head *queue,
228 bool txok)
229{
230 struct sk_buff *skb;
231
232 while ((skb = __skb_dequeue(queue)) != NULL) {
233 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
234 skb, txok);
235 if (txok)
236 TX_STAT_INC(skb_success);
237 else
238 TX_STAT_INC(skb_failed);
239 }
240}
241
242static void hif_usb_tx_cb(struct urb *urb)
243{
244 struct tx_buf *tx_buf = (struct tx_buf *) urb->context;
245 struct hif_device_usb *hif_dev;
246 bool txok = true;
247
248 if (!tx_buf || !tx_buf->hif_dev)
249 return;
250
251 hif_dev = tx_buf->hif_dev;
252
253 switch (urb->status) {
254 case 0:
255 break;
256 case -ENOENT:
257 case -ECONNRESET:
258 case -ENODEV:
259 case -ESHUTDOWN:
260 txok = false;
261
262 /*
263 * If the URBs are being flushed, no need to add this
264 * URB to the free list.
265 */
266 spin_lock(&hif_dev->tx.tx_lock);
267 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) {
268 spin_unlock(&hif_dev->tx.tx_lock);
269 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
270 return;
271 }
272 spin_unlock(&hif_dev->tx.tx_lock);
273
274 break;
275 default:
276 txok = false;
277 break;
278 }
279
280 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, txok);
281
282 /* Re-initialize the SKB queue */
283 tx_buf->len = tx_buf->offset = 0;
284 __skb_queue_head_init(&tx_buf->skb_queue);
285
286 /* Add this TX buffer to the free list */
287 spin_lock(&hif_dev->tx.tx_lock);
288 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
289 hif_dev->tx.tx_buf_cnt++;
290 if (!(hif_dev->tx.flags & HIF_USB_TX_STOP))
291 __hif_usb_tx(hif_dev); /* Check for pending SKBs */
292 TX_STAT_INC(buf_completed);
293 spin_unlock(&hif_dev->tx.tx_lock);
294}
295
296/* TX lock has to be taken */
297static int __hif_usb_tx(struct hif_device_usb *hif_dev)
298{
299 struct tx_buf *tx_buf = NULL;
300 struct sk_buff *nskb = NULL;
301 int ret = 0, i;
302 u16 tx_skb_cnt = 0;
303 u8 *buf;
304 __le16 *hdr;
305
306 if (hif_dev->tx.tx_skb_cnt == 0)
307 return 0;
308
309 /* Check if a free TX buffer is available */
310 if (list_empty(&hif_dev->tx.tx_buf))
311 return 0;
312
313 tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list);
314 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending);
315 hif_dev->tx.tx_buf_cnt--;
316
317 tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM);
318
319 for (i = 0; i < tx_skb_cnt; i++) {
320 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue);
321
322 /* Should never be NULL */
323 BUG_ON(!nskb);
324
325 hif_dev->tx.tx_skb_cnt--;
326
327 buf = tx_buf->buf;
328 buf += tx_buf->offset;
329 hdr = (__le16 *)buf;
330 *hdr++ = cpu_to_le16(nskb->len);
331 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG);
332 buf += 4;
333 memcpy(buf, nskb->data, nskb->len);
334 tx_buf->len = nskb->len + 4;
335
336 if (i < (tx_skb_cnt - 1))
337 tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4;
338
339 if (i == (tx_skb_cnt - 1))
340 tx_buf->len += tx_buf->offset;
341
342 __skb_queue_tail(&tx_buf->skb_queue, nskb);
343 TX_STAT_INC(skb_queued);
344 }
345
346 usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev,
347 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
348 tx_buf->buf, tx_buf->len,
349 hif_usb_tx_cb, tx_buf);
350
351 ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC);
352 if (ret) {
353 tx_buf->len = tx_buf->offset = 0;
354 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, false);
355 __skb_queue_head_init(&tx_buf->skb_queue);
356 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
357 hif_dev->tx.tx_buf_cnt++;
358 }
359
360 if (!ret)
361 TX_STAT_INC(buf_queued);
362
363 return ret;
364}
365
366static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb)
367{
368 struct ath9k_htc_tx_ctl *tx_ctl;
369 unsigned long flags;
370 int ret = 0;
371
372 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
373
374 if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
375 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
376 return -ENODEV;
377 }
378
379 /* Check if the max queue count has been reached */
380 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) {
381 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
382 return -ENOMEM;
383 }
384
385 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
386
387 tx_ctl = HTC_SKB_CB(skb);
388
389 /* Mgmt/Beacon frames don't use the TX buffer pool */
390 if ((tx_ctl->type == ATH9K_HTC_MGMT) ||
391 (tx_ctl->type == ATH9K_HTC_BEACON)) {
392 ret = hif_usb_send_mgmt(hif_dev, skb);
393 }
394
395 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
396
397 if ((tx_ctl->type == ATH9K_HTC_NORMAL) ||
398 (tx_ctl->type == ATH9K_HTC_AMPDU)) {
399 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb);
400 hif_dev->tx.tx_skb_cnt++;
401 }
402
403 /* Check if AMPDUs have to be sent immediately */
404 if ((hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) &&
405 (hif_dev->tx.tx_skb_cnt < 2)) {
406 __hif_usb_tx(hif_dev);
407 }
408
409 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
410
411 return ret;
412}
413
414static void hif_usb_start(void *hif_handle)
415{
416 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
417 unsigned long flags;
418
419 hif_dev->flags |= HIF_USB_START;
420
421 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
422 hif_dev->tx.flags &= ~HIF_USB_TX_STOP;
423 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
424}
425
426static void hif_usb_stop(void *hif_handle)
427{
428 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
429 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
430 unsigned long flags;
431
432 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
433 ath9k_skb_queue_complete(hif_dev, &hif_dev->tx.tx_skb_queue, false);
434 hif_dev->tx.tx_skb_cnt = 0;
435 hif_dev->tx.flags |= HIF_USB_TX_STOP;
436 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
437
438 /* The pending URBs have to be canceled. */
439 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
440 &hif_dev->tx.tx_pending, list) {
441 usb_kill_urb(tx_buf->urb);
442 }
443
444 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
445}
446
447static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb)
448{
449 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
450 int ret = 0;
451
452 switch (pipe_id) {
453 case USB_WLAN_TX_PIPE:
454 ret = hif_usb_send_tx(hif_dev, skb);
455 break;
456 case USB_REG_OUT_PIPE:
457 ret = hif_usb_send_regout(hif_dev, skb);
458 break;
459 default:
460 dev_err(&hif_dev->udev->dev,
461 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id);
462 ret = -EINVAL;
463 break;
464 }
465
466 return ret;
467}
468
469static inline bool check_index(struct sk_buff *skb, u8 idx)
470{
471 struct ath9k_htc_tx_ctl *tx_ctl;
472
473 tx_ctl = HTC_SKB_CB(skb);
474
475 if ((tx_ctl->type == ATH9K_HTC_AMPDU) &&
476 (tx_ctl->sta_idx == idx))
477 return true;
478
479 return false;
480}
481
482static void hif_usb_sta_drain(void *hif_handle, u8 idx)
483{
484 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
485 struct sk_buff *skb, *tmp;
486 unsigned long flags;
487
488 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
489
490 skb_queue_walk_safe(&hif_dev->tx.tx_skb_queue, skb, tmp) {
491 if (check_index(skb, idx)) {
492 __skb_unlink(skb, &hif_dev->tx.tx_skb_queue);
493 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
494 skb, false);
495 hif_dev->tx.tx_skb_cnt--;
496 TX_STAT_INC(skb_failed);
497 }
498 }
499
500 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
501}
502
503static struct ath9k_htc_hif hif_usb = {
504 .transport = ATH9K_HIF_USB,
505 .name = "ath9k_hif_usb",
506
507 .control_ul_pipe = USB_REG_OUT_PIPE,
508 .control_dl_pipe = USB_REG_IN_PIPE,
509
510 .start = hif_usb_start,
511 .stop = hif_usb_stop,
512 .sta_drain = hif_usb_sta_drain,
513 .send = hif_usb_send,
514};
515
516static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev,
517 struct sk_buff *skb)
518{
519 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER];
520 int index = 0, i = 0, len = skb->len;
521 int rx_remain_len, rx_pkt_len;
522 u16 pool_index = 0;
523 u8 *ptr;
524
525 spin_lock(&hif_dev->rx_lock);
526
527 rx_remain_len = hif_dev->rx_remain_len;
528 rx_pkt_len = hif_dev->rx_transfer_len;
529
530 if (rx_remain_len != 0) {
531 struct sk_buff *remain_skb = hif_dev->remain_skb;
532
533 if (remain_skb) {
534 ptr = (u8 *) remain_skb->data;
535
536 index = rx_remain_len;
537 rx_remain_len -= hif_dev->rx_pad_len;
538 ptr += rx_pkt_len;
539
540 memcpy(ptr, skb->data, rx_remain_len);
541
542 rx_pkt_len += rx_remain_len;
543 hif_dev->rx_remain_len = 0;
544 skb_put(remain_skb, rx_pkt_len);
545
546 skb_pool[pool_index++] = remain_skb;
547
548 } else {
549 index = rx_remain_len;
550 }
551 }
552
553 spin_unlock(&hif_dev->rx_lock);
554
555 while (index < len) {
556 u16 pkt_len;
557 u16 pkt_tag;
558 u16 pad_len;
559 int chk_idx;
560
561 ptr = (u8 *) skb->data;
562
563 pkt_len = get_unaligned_le16(ptr + index);
564 pkt_tag = get_unaligned_le16(ptr + index + 2);
565
566 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) {
567 RX_STAT_INC(skb_dropped);
568 return;
569 }
570
571 pad_len = 4 - (pkt_len & 0x3);
572 if (pad_len == 4)
573 pad_len = 0;
574
575 chk_idx = index;
576 index = index + 4 + pkt_len + pad_len;
577
578 if (index > MAX_RX_BUF_SIZE) {
579 spin_lock(&hif_dev->rx_lock);
580 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE;
581 hif_dev->rx_transfer_len =
582 MAX_RX_BUF_SIZE - chk_idx - 4;
583 hif_dev->rx_pad_len = pad_len;
584
585 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
586 if (!nskb) {
587 dev_err(&hif_dev->udev->dev,
588 "ath9k_htc: RX memory allocation error\n");
589 spin_unlock(&hif_dev->rx_lock);
590 goto err;
591 }
592 skb_reserve(nskb, 32);
593 RX_STAT_INC(skb_allocated);
594
595 memcpy(nskb->data, &(skb->data[chk_idx+4]),
596 hif_dev->rx_transfer_len);
597
598 /* Record the buffer pointer */
599 hif_dev->remain_skb = nskb;
600 spin_unlock(&hif_dev->rx_lock);
601 } else {
602 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
603 if (!nskb) {
604 dev_err(&hif_dev->udev->dev,
605 "ath9k_htc: RX memory allocation error\n");
606 goto err;
607 }
608 skb_reserve(nskb, 32);
609 RX_STAT_INC(skb_allocated);
610
611 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len);
612 skb_put(nskb, pkt_len);
613 skb_pool[pool_index++] = nskb;
614 }
615 }
616
617err:
618 for (i = 0; i < pool_index; i++) {
619 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i],
620 skb_pool[i]->len, USB_WLAN_RX_PIPE);
621 RX_STAT_INC(skb_completed);
622 }
623}
624
625static void ath9k_hif_usb_rx_cb(struct urb *urb)
626{
627 struct sk_buff *skb = (struct sk_buff *) urb->context;
628 struct hif_device_usb *hif_dev =
629 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
630 int ret;
631
632 if (!skb)
633 return;
634
635 if (!hif_dev)
636 goto free;
637
638 switch (urb->status) {
639 case 0:
640 break;
641 case -ENOENT:
642 case -ECONNRESET:
643 case -ENODEV:
644 case -ESHUTDOWN:
645 goto free;
646 default:
647 goto resubmit;
648 }
649
650 if (likely(urb->actual_length != 0)) {
651 skb_put(skb, urb->actual_length);
652 ath9k_hif_usb_rx_stream(hif_dev, skb);
653 }
654
655resubmit:
656 skb_reset_tail_pointer(skb);
657 skb_trim(skb, 0);
658
659 usb_anchor_urb(urb, &hif_dev->rx_submitted);
660 ret = usb_submit_urb(urb, GFP_ATOMIC);
661 if (ret) {
662 usb_unanchor_urb(urb);
663 goto free;
664 }
665
666 return;
667free:
668 kfree_skb(skb);
669}
670
671static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
672{
673 struct sk_buff *skb = (struct sk_buff *) urb->context;
674 struct sk_buff *nskb;
675 struct hif_device_usb *hif_dev =
676 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
677 int ret;
678
679 if (!skb)
680 return;
681
682 if (!hif_dev)
683 goto free;
684
685 switch (urb->status) {
686 case 0:
687 break;
688 case -ENOENT:
689 case -ECONNRESET:
690 case -ENODEV:
691 case -ESHUTDOWN:
692 goto free;
693 default:
694 skb_reset_tail_pointer(skb);
695 skb_trim(skb, 0);
696
697 goto resubmit;
698 }
699
700 if (likely(urb->actual_length != 0)) {
701 skb_put(skb, urb->actual_length);
702
703 /* Process the command first */
704 ath9k_htc_rx_msg(hif_dev->htc_handle, skb,
705 skb->len, USB_REG_IN_PIPE);
706
707
708 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC);
709 if (!nskb) {
710 dev_err(&hif_dev->udev->dev,
711 "ath9k_htc: REG_IN memory allocation failure\n");
712 urb->context = NULL;
713 return;
714 }
715
716 usb_fill_bulk_urb(urb, hif_dev->udev,
717 usb_rcvbulkpipe(hif_dev->udev,
718 USB_REG_IN_PIPE),
719 nskb->data, MAX_REG_IN_BUF_SIZE,
720 ath9k_hif_usb_reg_in_cb, nskb);
721 }
722
723resubmit:
724 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
725 ret = usb_submit_urb(urb, GFP_ATOMIC);
726 if (ret) {
727 usb_unanchor_urb(urb);
728 goto free;
729 }
730
731 return;
732free:
733 kfree_skb(skb);
734 urb->context = NULL;
735}
736
737static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
738{
739 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
740 unsigned long flags;
741
742 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
743 &hif_dev->tx.tx_buf, list) {
744 usb_kill_urb(tx_buf->urb);
745 list_del(&tx_buf->list);
746 usb_free_urb(tx_buf->urb);
747 kfree(tx_buf->buf);
748 kfree(tx_buf);
749 }
750
751 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
752 hif_dev->tx.flags |= HIF_USB_TX_FLUSH;
753 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
754
755 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
756 &hif_dev->tx.tx_pending, list) {
757 usb_kill_urb(tx_buf->urb);
758 list_del(&tx_buf->list);
759 usb_free_urb(tx_buf->urb);
760 kfree(tx_buf->buf);
761 kfree(tx_buf);
762 }
763
764 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
765}
766
767static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev)
768{
769 struct tx_buf *tx_buf;
770 int i;
771
772 INIT_LIST_HEAD(&hif_dev->tx.tx_buf);
773 INIT_LIST_HEAD(&hif_dev->tx.tx_pending);
774 spin_lock_init(&hif_dev->tx.tx_lock);
775 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue);
776 init_usb_anchor(&hif_dev->mgmt_submitted);
777
778 for (i = 0; i < MAX_TX_URB_NUM; i++) {
779 tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL);
780 if (!tx_buf)
781 goto err;
782
783 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL);
784 if (!tx_buf->buf)
785 goto err;
786
787 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL);
788 if (!tx_buf->urb)
789 goto err;
790
791 tx_buf->hif_dev = hif_dev;
792 __skb_queue_head_init(&tx_buf->skb_queue);
793
794 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
795 }
796
797 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM;
798
799 return 0;
800err:
801 if (tx_buf) {
802 kfree(tx_buf->buf);
803 kfree(tx_buf);
804 }
805 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
806 return -ENOMEM;
807}
808
809static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev)
810{
811 usb_kill_anchored_urbs(&hif_dev->rx_submitted);
812}
813
814static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
815{
816 struct urb *urb = NULL;
817 struct sk_buff *skb = NULL;
818 int i, ret;
819
820 init_usb_anchor(&hif_dev->rx_submitted);
821 spin_lock_init(&hif_dev->rx_lock);
822
823 for (i = 0; i < MAX_RX_URB_NUM; i++) {
824
825 /* Allocate URB */
826 urb = usb_alloc_urb(0, GFP_KERNEL);
827 if (urb == NULL) {
828 ret = -ENOMEM;
829 goto err_urb;
830 }
831
832 /* Allocate buffer */
833 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL);
834 if (!skb) {
835 ret = -ENOMEM;
836 goto err_skb;
837 }
838
839 usb_fill_bulk_urb(urb, hif_dev->udev,
840 usb_rcvbulkpipe(hif_dev->udev,
841 USB_WLAN_RX_PIPE),
842 skb->data, MAX_RX_BUF_SIZE,
843 ath9k_hif_usb_rx_cb, skb);
844
845 /* Anchor URB */
846 usb_anchor_urb(urb, &hif_dev->rx_submitted);
847
848 /* Submit URB */
849 ret = usb_submit_urb(urb, GFP_KERNEL);
850 if (ret) {
851 usb_unanchor_urb(urb);
852 goto err_submit;
853 }
854
855 /*
856 * Drop reference count.
857 * This ensures that the URB is freed when killing them.
858 */
859 usb_free_urb(urb);
860 }
861
862 return 0;
863
864err_submit:
865 kfree_skb(skb);
866err_skb:
867 usb_free_urb(urb);
868err_urb:
869 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
870 return ret;
871}
872
873static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev)
874{
875 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted);
876}
877
878static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev)
879{
880 struct urb *urb = NULL;
881 struct sk_buff *skb = NULL;
882 int i, ret;
883
884 init_usb_anchor(&hif_dev->reg_in_submitted);
885
886 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) {
887
888 /* Allocate URB */
889 urb = usb_alloc_urb(0, GFP_KERNEL);
890 if (urb == NULL) {
891 ret = -ENOMEM;
892 goto err_urb;
893 }
894
895 /* Allocate buffer */
896 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL);
897 if (!skb) {
898 ret = -ENOMEM;
899 goto err_skb;
900 }
901
902 usb_fill_bulk_urb(urb, hif_dev->udev,
903 usb_rcvbulkpipe(hif_dev->udev,
904 USB_REG_IN_PIPE),
905 skb->data, MAX_REG_IN_BUF_SIZE,
906 ath9k_hif_usb_reg_in_cb, skb);
907
908 /* Anchor URB */
909 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
910
911 /* Submit URB */
912 ret = usb_submit_urb(urb, GFP_KERNEL);
913 if (ret) {
914 usb_unanchor_urb(urb);
915 goto err_submit;
916 }
917
918 /*
919 * Drop reference count.
920 * This ensures that the URB is freed when killing them.
921 */
922 usb_free_urb(urb);
923 }
924
925 return 0;
926
927err_submit:
928 kfree_skb(skb);
929err_skb:
930 usb_free_urb(urb);
931err_urb:
932 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
933 return ret;
934}
935
936static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev)
937{
938 /* Register Write */
939 init_usb_anchor(&hif_dev->regout_submitted);
940
941 /* TX */
942 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0)
943 goto err;
944
945 /* RX */
946 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0)
947 goto err_rx;
948
949 /* Register Read */
950 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0)
951 goto err_reg;
952
953 return 0;
954err_reg:
955 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
956err_rx:
957 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
958err:
959 return -ENOMEM;
960}
961
962static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev)
963{
964 usb_kill_anchored_urbs(&hif_dev->regout_submitted);
965 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
966 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
967 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
968}
969
970static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev,
971 u32 drv_info)
972{
973 int transfer, err;
974 const void *data = hif_dev->firmware->data;
975 size_t len = hif_dev->firmware->size;
976 u32 addr = AR9271_FIRMWARE;
977 u8 *buf = kzalloc(4096, GFP_KERNEL);
978 u32 firm_offset;
979
980 if (!buf)
981 return -ENOMEM;
982
983 while (len) {
984 transfer = min_t(int, len, 4096);
985 memcpy(buf, data, transfer);
986
987 err = usb_control_msg(hif_dev->udev,
988 usb_sndctrlpipe(hif_dev->udev, 0),
989 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT,
990 addr >> 8, 0, buf, transfer, HZ);
991 if (err < 0) {
992 kfree(buf);
993 return err;
994 }
995
996 len -= transfer;
997 data += transfer;
998 addr += transfer;
999 }
1000 kfree(buf);
1001
1002 if (IS_AR7010_DEVICE(drv_info))
1003 firm_offset = AR7010_FIRMWARE_TEXT;
1004 else
1005 firm_offset = AR9271_FIRMWARE_TEXT;
1006
1007 /*
1008 * Issue FW download complete command to firmware.
1009 */
1010 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0),
1011 FIRMWARE_DOWNLOAD_COMP,
1012 0x40 | USB_DIR_OUT,
1013 firm_offset >> 8, 0, NULL, 0, HZ);
1014 if (err)
1015 return -EIO;
1016
1017 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n",
1018 hif_dev->fw_name, (unsigned long) hif_dev->firmware->size);
1019
1020 return 0;
1021}
1022
1023static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev, u32 drv_info)
1024{
1025 int ret, idx;
1026 struct usb_host_interface *alt = &hif_dev->interface->altsetting[0];
1027 struct usb_endpoint_descriptor *endp;
1028
1029 /* Request firmware */
1030 ret = request_firmware(&hif_dev->firmware, hif_dev->fw_name,
1031 &hif_dev->udev->dev);
1032 if (ret) {
1033 dev_err(&hif_dev->udev->dev,
1034 "ath9k_htc: Firmware - %s not found\n", hif_dev->fw_name);
1035 goto err_fw_req;
1036 }
1037
1038 /* Download firmware */
1039 ret = ath9k_hif_usb_download_fw(hif_dev, drv_info);
1040 if (ret) {
1041 dev_err(&hif_dev->udev->dev,
1042 "ath9k_htc: Firmware - %s download failed\n",
1043 hif_dev->fw_name);
1044 goto err_fw_download;
1045 }
1046
1047 /* On downloading the firmware to the target, the USB descriptor of EP4
1048 * is 'patched' to change the type of the endpoint to Bulk. This will
1049 * bring down CPU usage during the scan period.
1050 */
1051 for (idx = 0; idx < alt->desc.bNumEndpoints; idx++) {
1052 endp = &alt->endpoint[idx].desc;
1053 if ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1054 == USB_ENDPOINT_XFER_INT) {
1055 endp->bmAttributes &= ~USB_ENDPOINT_XFERTYPE_MASK;
1056 endp->bmAttributes |= USB_ENDPOINT_XFER_BULK;
1057 endp->bInterval = 0;
1058 }
1059 }
1060
1061 /* Alloc URBs */
1062 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1063 if (ret) {
1064 dev_err(&hif_dev->udev->dev,
1065 "ath9k_htc: Unable to allocate URBs\n");
1066 goto err_fw_download;
1067 }
1068
1069 return 0;
1070
1071err_fw_download:
1072 release_firmware(hif_dev->firmware);
1073err_fw_req:
1074 hif_dev->firmware = NULL;
1075 return ret;
1076}
1077
1078static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev)
1079{
1080 ath9k_hif_usb_dealloc_urbs(hif_dev);
1081 if (hif_dev->firmware)
1082 release_firmware(hif_dev->firmware);
1083}
1084
1085/*
1086 * An exact copy of the function from zd1211rw.
1087 */
1088static int send_eject_command(struct usb_interface *interface)
1089{
1090 struct usb_device *udev = interface_to_usbdev(interface);
1091 struct usb_host_interface *iface_desc = &interface->altsetting[0];
1092 struct usb_endpoint_descriptor *endpoint;
1093 unsigned char *cmd;
1094 u8 bulk_out_ep;
1095 int r;
1096
1097 /* Find bulk out endpoint */
1098 for (r = 1; r >= 0; r--) {
1099 endpoint = &iface_desc->endpoint[r].desc;
1100 if (usb_endpoint_dir_out(endpoint) &&
1101 usb_endpoint_xfer_bulk(endpoint)) {
1102 bulk_out_ep = endpoint->bEndpointAddress;
1103 break;
1104 }
1105 }
1106 if (r == -1) {
1107 dev_err(&udev->dev,
1108 "ath9k_htc: Could not find bulk out endpoint\n");
1109 return -ENODEV;
1110 }
1111
1112 cmd = kzalloc(31, GFP_KERNEL);
1113 if (cmd == NULL)
1114 return -ENODEV;
1115
1116 /* USB bulk command block */
1117 cmd[0] = 0x55; /* bulk command signature */
1118 cmd[1] = 0x53; /* bulk command signature */
1119 cmd[2] = 0x42; /* bulk command signature */
1120 cmd[3] = 0x43; /* bulk command signature */
1121 cmd[14] = 6; /* command length */
1122
1123 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
1124 cmd[19] = 0x2; /* eject disc */
1125
1126 dev_info(&udev->dev, "Ejecting storage device...\n");
1127 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
1128 cmd, 31, NULL, 2000);
1129 kfree(cmd);
1130 if (r)
1131 return r;
1132
1133 /* At this point, the device disconnects and reconnects with the real
1134 * ID numbers. */
1135
1136 usb_set_intfdata(interface, NULL);
1137 return 0;
1138}
1139
1140static int ath9k_hif_usb_probe(struct usb_interface *interface,
1141 const struct usb_device_id *id)
1142{
1143 struct usb_device *udev = interface_to_usbdev(interface);
1144 struct hif_device_usb *hif_dev;
1145 int ret = 0;
1146
1147 if (id->driver_info == STORAGE_DEVICE)
1148 return send_eject_command(interface);
1149
1150 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL);
1151 if (!hif_dev) {
1152 ret = -ENOMEM;
1153 goto err_alloc;
1154 }
1155
1156 usb_get_dev(udev);
1157 hif_dev->udev = udev;
1158 hif_dev->interface = interface;
1159 hif_dev->device_id = id->idProduct;
1160#ifdef CONFIG_PM
1161 udev->reset_resume = 1;
1162#endif
1163 usb_set_intfdata(interface, hif_dev);
1164
1165 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb,
1166 &hif_dev->udev->dev);
1167 if (hif_dev->htc_handle == NULL) {
1168 ret = -ENOMEM;
1169 goto err_htc_hw_alloc;
1170 }
1171
1172 /* Find out which firmware to load */
1173
1174 if (IS_AR7010_DEVICE(id->driver_info))
1175 hif_dev->fw_name = FIRMWARE_AR7010_1_1;
1176 else
1177 hif_dev->fw_name = FIRMWARE_AR9271;
1178
1179 ret = ath9k_hif_usb_dev_init(hif_dev, id->driver_info);
1180 if (ret) {
1181 ret = -EINVAL;
1182 goto err_hif_init_usb;
1183 }
1184
1185 ret = ath9k_htc_hw_init(hif_dev->htc_handle,
1186 &interface->dev, hif_dev->device_id,
1187 hif_dev->udev->product, id->driver_info);
1188 if (ret) {
1189 ret = -EINVAL;
1190 goto err_htc_hw_init;
1191 }
1192
1193 dev_info(&hif_dev->udev->dev, "ath9k_htc: USB layer initialized\n");
1194
1195 return 0;
1196
1197err_htc_hw_init:
1198 ath9k_hif_usb_dev_deinit(hif_dev);
1199err_hif_init_usb:
1200 ath9k_htc_hw_free(hif_dev->htc_handle);
1201err_htc_hw_alloc:
1202 usb_set_intfdata(interface, NULL);
1203 kfree(hif_dev);
1204 usb_put_dev(udev);
1205err_alloc:
1206 return ret;
1207}
1208
1209static void ath9k_hif_usb_reboot(struct usb_device *udev)
1210{
1211 u32 reboot_cmd = 0xffffffff;
1212 void *buf;
1213 int ret;
1214
1215 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL);
1216 if (!buf)
1217 return;
1218
1219 ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, USB_REG_OUT_PIPE),
1220 buf, 4, NULL, HZ);
1221 if (ret)
1222 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
1223
1224 kfree(buf);
1225}
1226
1227static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
1228{
1229 struct usb_device *udev = interface_to_usbdev(interface);
1230 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1231 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false;
1232
1233 if (!hif_dev)
1234 return;
1235
1236 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged);
1237 ath9k_htc_hw_free(hif_dev->htc_handle);
1238 ath9k_hif_usb_dev_deinit(hif_dev);
1239 usb_set_intfdata(interface, NULL);
1240
1241 if (!unplugged && (hif_dev->flags & HIF_USB_START))
1242 ath9k_hif_usb_reboot(udev);
1243
1244 kfree(hif_dev);
1245 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");
1246 usb_put_dev(udev);
1247}
1248
1249#ifdef CONFIG_PM
1250static int ath9k_hif_usb_suspend(struct usb_interface *interface,
1251 pm_message_t message)
1252{
1253 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1254
1255 /*
1256 * The device has to be set to FULLSLEEP mode in case no
1257 * interface is up.
1258 */
1259 if (!(hif_dev->flags & HIF_USB_START))
1260 ath9k_htc_suspend(hif_dev->htc_handle);
1261
1262 ath9k_hif_usb_dealloc_urbs(hif_dev);
1263
1264 return 0;
1265}
1266
1267static int ath9k_hif_usb_resume(struct usb_interface *interface)
1268{
1269 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1270 struct htc_target *htc_handle = hif_dev->htc_handle;
1271 int ret;
1272
1273 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1274 if (ret)
1275 return ret;
1276
1277 if (hif_dev->firmware) {
1278 ret = ath9k_hif_usb_download_fw(hif_dev,
1279 htc_handle->drv_priv->ah->hw_version.usbdev);
1280 if (ret)
1281 goto fail_resume;
1282 } else {
1283 ath9k_hif_usb_dealloc_urbs(hif_dev);
1284 return -EIO;
1285 }
1286
1287 mdelay(100);
1288
1289 ret = ath9k_htc_resume(htc_handle);
1290
1291 if (ret)
1292 goto fail_resume;
1293
1294 return 0;
1295
1296fail_resume:
1297 ath9k_hif_usb_dealloc_urbs(hif_dev);
1298
1299 return ret;
1300}
1301#endif
1302
1303static struct usb_driver ath9k_hif_usb_driver = {
1304 .name = KBUILD_MODNAME,
1305 .probe = ath9k_hif_usb_probe,
1306 .disconnect = ath9k_hif_usb_disconnect,
1307#ifdef CONFIG_PM
1308 .suspend = ath9k_hif_usb_suspend,
1309 .resume = ath9k_hif_usb_resume,
1310 .reset_resume = ath9k_hif_usb_resume,
1311#endif
1312 .id_table = ath9k_hif_usb_ids,
1313 .soft_unbind = 1,
1314};
1315
1316int ath9k_hif_usb_init(void)
1317{
1318 return usb_register(&ath9k_hif_usb_driver);
1319}
1320
1321void ath9k_hif_usb_exit(void)
1322{
1323 usb_deregister(&ath9k_hif_usb_driver);
1324}
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
20MODULE_FIRMWARE(HTC_7010_MODULE_FW);
21MODULE_FIRMWARE(HTC_9271_MODULE_FW);
22
23static const struct usb_device_id ath9k_hif_usb_ids[] = {
24 { USB_DEVICE(0x0cf3, 0x9271) }, /* Atheros */
25 { USB_DEVICE(0x0cf3, 0x1006) }, /* Atheros */
26 { USB_DEVICE(0x0846, 0x9030) }, /* Netgear N150 */
27 { USB_DEVICE(0x07b8, 0x9271) }, /* Altai WA1011N-GU */
28 { USB_DEVICE(0x07D1, 0x3A10) }, /* Dlink Wireless 150 */
29 { USB_DEVICE(0x13D3, 0x3327) }, /* Azurewave */
30 { USB_DEVICE(0x13D3, 0x3328) }, /* Azurewave */
31 { USB_DEVICE(0x13D3, 0x3346) }, /* IMC Networks */
32 { USB_DEVICE(0x13D3, 0x3348) }, /* Azurewave */
33 { USB_DEVICE(0x13D3, 0x3349) }, /* Azurewave */
34 { USB_DEVICE(0x13D3, 0x3350) }, /* Azurewave */
35 { USB_DEVICE(0x04CA, 0x4605) }, /* Liteon */
36 { USB_DEVICE(0x040D, 0x3801) }, /* VIA */
37 { USB_DEVICE(0x0cf3, 0xb003) }, /* Ubiquiti WifiStation Ext */
38 { USB_DEVICE(0x0cf3, 0xb002) }, /* Ubiquiti WifiStation */
39 { USB_DEVICE(0x057c, 0x8403) }, /* AVM FRITZ!WLAN 11N v2 USB */
40 { USB_DEVICE(0x0471, 0x209e) }, /* Philips (or NXP) PTA01 */
41 { USB_DEVICE(0x1eda, 0x2315) }, /* AirTies */
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 { USB_DEVICE(0x0411, 0x0197),
57 .driver_info = AR9280_USB }, /* Buffalo WLI-UV-AG300P */
58 { USB_DEVICE(0x04da, 0x3904),
59 .driver_info = AR9280_USB },
60 { USB_DEVICE(0x0930, 0x0a08),
61 .driver_info = AR9280_USB }, /* Toshiba WLM-20U2 and GN-1080 */
62
63 { USB_DEVICE(0x0cf3, 0x20ff),
64 .driver_info = STORAGE_DEVICE },
65
66 { },
67};
68
69MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids);
70
71static int __hif_usb_tx(struct hif_device_usb *hif_dev);
72
73static void hif_usb_regout_cb(struct urb *urb)
74{
75 struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
76
77 switch (urb->status) {
78 case 0:
79 break;
80 case -ENOENT:
81 case -ECONNRESET:
82 case -ENODEV:
83 case -ESHUTDOWN:
84 goto free;
85 default:
86 break;
87 }
88
89 if (cmd) {
90 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
91 cmd->skb, true);
92 kfree(cmd);
93 }
94
95 return;
96free:
97 kfree_skb(cmd->skb);
98 kfree(cmd);
99}
100
101static int hif_usb_send_regout(struct hif_device_usb *hif_dev,
102 struct sk_buff *skb)
103{
104 struct urb *urb;
105 struct cmd_buf *cmd;
106 int ret = 0;
107
108 urb = usb_alloc_urb(0, GFP_KERNEL);
109 if (urb == NULL)
110 return -ENOMEM;
111
112 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
113 if (cmd == NULL) {
114 usb_free_urb(urb);
115 return -ENOMEM;
116 }
117
118 cmd->skb = skb;
119 cmd->hif_dev = hif_dev;
120
121 usb_fill_int_urb(urb, hif_dev->udev,
122 usb_sndintpipe(hif_dev->udev, USB_REG_OUT_PIPE),
123 skb->data, skb->len,
124 hif_usb_regout_cb, cmd, 1);
125
126 usb_anchor_urb(urb, &hif_dev->regout_submitted);
127 ret = usb_submit_urb(urb, GFP_KERNEL);
128 if (ret) {
129 usb_unanchor_urb(urb);
130 kfree(cmd);
131 }
132 usb_free_urb(urb);
133
134 return ret;
135}
136
137static void hif_usb_mgmt_cb(struct urb *urb)
138{
139 struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
140 struct hif_device_usb *hif_dev;
141 bool txok = true;
142
143 if (!cmd || !cmd->skb || !cmd->hif_dev)
144 return;
145
146 hif_dev = cmd->hif_dev;
147
148 switch (urb->status) {
149 case 0:
150 break;
151 case -ENOENT:
152 case -ECONNRESET:
153 case -ENODEV:
154 case -ESHUTDOWN:
155 txok = false;
156
157 /*
158 * If the URBs are being flushed, no need to complete
159 * this packet.
160 */
161 spin_lock(&hif_dev->tx.tx_lock);
162 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) {
163 spin_unlock(&hif_dev->tx.tx_lock);
164 dev_kfree_skb_any(cmd->skb);
165 kfree(cmd);
166 return;
167 }
168 spin_unlock(&hif_dev->tx.tx_lock);
169
170 break;
171 default:
172 txok = false;
173 break;
174 }
175
176 skb_pull(cmd->skb, 4);
177 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
178 cmd->skb, txok);
179 kfree(cmd);
180}
181
182static int hif_usb_send_mgmt(struct hif_device_usb *hif_dev,
183 struct sk_buff *skb)
184{
185 struct urb *urb;
186 struct cmd_buf *cmd;
187 int ret = 0;
188 __le16 *hdr;
189
190 urb = usb_alloc_urb(0, GFP_ATOMIC);
191 if (urb == NULL)
192 return -ENOMEM;
193
194 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
195 if (cmd == NULL) {
196 usb_free_urb(urb);
197 return -ENOMEM;
198 }
199
200 cmd->skb = skb;
201 cmd->hif_dev = hif_dev;
202
203 hdr = skb_push(skb, 4);
204 *hdr++ = cpu_to_le16(skb->len - 4);
205 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG);
206
207 usb_fill_bulk_urb(urb, hif_dev->udev,
208 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
209 skb->data, skb->len,
210 hif_usb_mgmt_cb, cmd);
211
212 usb_anchor_urb(urb, &hif_dev->mgmt_submitted);
213 ret = usb_submit_urb(urb, GFP_ATOMIC);
214 if (ret) {
215 usb_unanchor_urb(urb);
216 kfree(cmd);
217 }
218 usb_free_urb(urb);
219
220 return ret;
221}
222
223static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev,
224 struct sk_buff_head *list)
225{
226 struct sk_buff *skb;
227
228 while ((skb = __skb_dequeue(list)) != NULL) {
229 dev_kfree_skb_any(skb);
230 }
231}
232
233static inline void ath9k_skb_queue_complete(struct hif_device_usb *hif_dev,
234 struct sk_buff_head *queue,
235 bool txok)
236{
237 struct sk_buff *skb;
238
239 while ((skb = __skb_dequeue(queue)) != NULL) {
240#ifdef CONFIG_ATH9K_HTC_DEBUGFS
241 int ln = skb->len;
242#endif
243 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
244 skb, txok);
245 if (txok) {
246 TX_STAT_INC(skb_success);
247 TX_STAT_ADD(skb_success_bytes, ln);
248 }
249 else
250 TX_STAT_INC(skb_failed);
251 }
252}
253
254static void hif_usb_tx_cb(struct urb *urb)
255{
256 struct tx_buf *tx_buf = (struct tx_buf *) urb->context;
257 struct hif_device_usb *hif_dev;
258 bool txok = true;
259
260 if (!tx_buf || !tx_buf->hif_dev)
261 return;
262
263 hif_dev = tx_buf->hif_dev;
264
265 switch (urb->status) {
266 case 0:
267 break;
268 case -ENOENT:
269 case -ECONNRESET:
270 case -ENODEV:
271 case -ESHUTDOWN:
272 txok = false;
273
274 /*
275 * If the URBs are being flushed, no need to add this
276 * URB to the free list.
277 */
278 spin_lock(&hif_dev->tx.tx_lock);
279 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) {
280 spin_unlock(&hif_dev->tx.tx_lock);
281 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
282 return;
283 }
284 spin_unlock(&hif_dev->tx.tx_lock);
285
286 break;
287 default:
288 txok = false;
289 break;
290 }
291
292 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, txok);
293
294 /* Re-initialize the SKB queue */
295 tx_buf->len = tx_buf->offset = 0;
296 __skb_queue_head_init(&tx_buf->skb_queue);
297
298 /* Add this TX buffer to the free list */
299 spin_lock(&hif_dev->tx.tx_lock);
300 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
301 hif_dev->tx.tx_buf_cnt++;
302 if (!(hif_dev->tx.flags & HIF_USB_TX_STOP))
303 __hif_usb_tx(hif_dev); /* Check for pending SKBs */
304 TX_STAT_INC(buf_completed);
305 spin_unlock(&hif_dev->tx.tx_lock);
306}
307
308/* TX lock has to be taken */
309static int __hif_usb_tx(struct hif_device_usb *hif_dev)
310{
311 struct tx_buf *tx_buf = NULL;
312 struct sk_buff *nskb = NULL;
313 int ret = 0, i;
314 u16 tx_skb_cnt = 0;
315 u8 *buf;
316 __le16 *hdr;
317
318 if (hif_dev->tx.tx_skb_cnt == 0)
319 return 0;
320
321 /* Check if a free TX buffer is available */
322 if (list_empty(&hif_dev->tx.tx_buf))
323 return 0;
324
325 tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list);
326 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending);
327 hif_dev->tx.tx_buf_cnt--;
328
329 tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM);
330
331 for (i = 0; i < tx_skb_cnt; i++) {
332 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue);
333
334 /* Should never be NULL */
335 BUG_ON(!nskb);
336
337 hif_dev->tx.tx_skb_cnt--;
338
339 buf = tx_buf->buf;
340 buf += tx_buf->offset;
341 hdr = (__le16 *)buf;
342 *hdr++ = cpu_to_le16(nskb->len);
343 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG);
344 buf += 4;
345 memcpy(buf, nskb->data, nskb->len);
346 tx_buf->len = nskb->len + 4;
347
348 if (i < (tx_skb_cnt - 1))
349 tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4;
350
351 if (i == (tx_skb_cnt - 1))
352 tx_buf->len += tx_buf->offset;
353
354 __skb_queue_tail(&tx_buf->skb_queue, nskb);
355 TX_STAT_INC(skb_queued);
356 }
357
358 usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev,
359 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
360 tx_buf->buf, tx_buf->len,
361 hif_usb_tx_cb, tx_buf);
362
363 ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC);
364 if (ret) {
365 tx_buf->len = tx_buf->offset = 0;
366 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, false);
367 __skb_queue_head_init(&tx_buf->skb_queue);
368 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
369 hif_dev->tx.tx_buf_cnt++;
370 }
371
372 if (!ret)
373 TX_STAT_INC(buf_queued);
374
375 return ret;
376}
377
378static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb)
379{
380 struct ath9k_htc_tx_ctl *tx_ctl;
381 unsigned long flags;
382 int ret = 0;
383
384 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
385
386 if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
387 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
388 return -ENODEV;
389 }
390
391 /* Check if the max queue count has been reached */
392 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) {
393 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
394 return -ENOMEM;
395 }
396
397 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
398
399 tx_ctl = HTC_SKB_CB(skb);
400
401 /* Mgmt/Beacon frames don't use the TX buffer pool */
402 if ((tx_ctl->type == ATH9K_HTC_MGMT) ||
403 (tx_ctl->type == ATH9K_HTC_BEACON)) {
404 ret = hif_usb_send_mgmt(hif_dev, skb);
405 }
406
407 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
408
409 if ((tx_ctl->type == ATH9K_HTC_NORMAL) ||
410 (tx_ctl->type == ATH9K_HTC_AMPDU)) {
411 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb);
412 hif_dev->tx.tx_skb_cnt++;
413 }
414
415 /* Check if AMPDUs have to be sent immediately */
416 if ((hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) &&
417 (hif_dev->tx.tx_skb_cnt < 2)) {
418 __hif_usb_tx(hif_dev);
419 }
420
421 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
422
423 return ret;
424}
425
426static void hif_usb_start(void *hif_handle)
427{
428 struct hif_device_usb *hif_dev = hif_handle;
429 unsigned long flags;
430
431 hif_dev->flags |= HIF_USB_START;
432
433 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
434 hif_dev->tx.flags &= ~HIF_USB_TX_STOP;
435 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
436}
437
438static void hif_usb_stop(void *hif_handle)
439{
440 struct hif_device_usb *hif_dev = hif_handle;
441 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
442 unsigned long flags;
443
444 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
445 ath9k_skb_queue_complete(hif_dev, &hif_dev->tx.tx_skb_queue, false);
446 hif_dev->tx.tx_skb_cnt = 0;
447 hif_dev->tx.flags |= HIF_USB_TX_STOP;
448 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
449
450 /* The pending URBs have to be canceled. */
451 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
452 &hif_dev->tx.tx_pending, list) {
453 usb_kill_urb(tx_buf->urb);
454 }
455
456 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
457}
458
459static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb)
460{
461 struct hif_device_usb *hif_dev = hif_handle;
462 int ret = 0;
463
464 switch (pipe_id) {
465 case USB_WLAN_TX_PIPE:
466 ret = hif_usb_send_tx(hif_dev, skb);
467 break;
468 case USB_REG_OUT_PIPE:
469 ret = hif_usb_send_regout(hif_dev, skb);
470 break;
471 default:
472 dev_err(&hif_dev->udev->dev,
473 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id);
474 ret = -EINVAL;
475 break;
476 }
477
478 return ret;
479}
480
481static inline bool check_index(struct sk_buff *skb, u8 idx)
482{
483 struct ath9k_htc_tx_ctl *tx_ctl;
484
485 tx_ctl = HTC_SKB_CB(skb);
486
487 if ((tx_ctl->type == ATH9K_HTC_AMPDU) &&
488 (tx_ctl->sta_idx == idx))
489 return true;
490
491 return false;
492}
493
494static void hif_usb_sta_drain(void *hif_handle, u8 idx)
495{
496 struct hif_device_usb *hif_dev = hif_handle;
497 struct sk_buff *skb, *tmp;
498 unsigned long flags;
499
500 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
501
502 skb_queue_walk_safe(&hif_dev->tx.tx_skb_queue, skb, tmp) {
503 if (check_index(skb, idx)) {
504 __skb_unlink(skb, &hif_dev->tx.tx_skb_queue);
505 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
506 skb, false);
507 hif_dev->tx.tx_skb_cnt--;
508 TX_STAT_INC(skb_failed);
509 }
510 }
511
512 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
513}
514
515static struct ath9k_htc_hif hif_usb = {
516 .transport = ATH9K_HIF_USB,
517 .name = "ath9k_hif_usb",
518
519 .control_ul_pipe = USB_REG_OUT_PIPE,
520 .control_dl_pipe = USB_REG_IN_PIPE,
521
522 .start = hif_usb_start,
523 .stop = hif_usb_stop,
524 .sta_drain = hif_usb_sta_drain,
525 .send = hif_usb_send,
526};
527
528static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev,
529 struct sk_buff *skb)
530{
531 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER];
532 int index = 0, i, len = skb->len;
533 int rx_remain_len, rx_pkt_len;
534 u16 pool_index = 0;
535 u8 *ptr;
536
537 spin_lock(&hif_dev->rx_lock);
538
539 rx_remain_len = hif_dev->rx_remain_len;
540 rx_pkt_len = hif_dev->rx_transfer_len;
541
542 if (rx_remain_len != 0) {
543 struct sk_buff *remain_skb = hif_dev->remain_skb;
544
545 if (remain_skb) {
546 ptr = (u8 *) remain_skb->data;
547
548 index = rx_remain_len;
549 rx_remain_len -= hif_dev->rx_pad_len;
550 ptr += rx_pkt_len;
551
552 memcpy(ptr, skb->data, rx_remain_len);
553
554 rx_pkt_len += rx_remain_len;
555 hif_dev->rx_remain_len = 0;
556 skb_put(remain_skb, rx_pkt_len);
557
558 skb_pool[pool_index++] = remain_skb;
559
560 } else {
561 index = rx_remain_len;
562 }
563 }
564
565 spin_unlock(&hif_dev->rx_lock);
566
567 while (index < len) {
568 u16 pkt_len;
569 u16 pkt_tag;
570 u16 pad_len;
571 int chk_idx;
572
573 ptr = (u8 *) skb->data;
574
575 pkt_len = get_unaligned_le16(ptr + index);
576 pkt_tag = get_unaligned_le16(ptr + index + 2);
577
578 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) {
579 RX_STAT_INC(skb_dropped);
580 return;
581 }
582
583 pad_len = 4 - (pkt_len & 0x3);
584 if (pad_len == 4)
585 pad_len = 0;
586
587 chk_idx = index;
588 index = index + 4 + pkt_len + pad_len;
589
590 if (index > MAX_RX_BUF_SIZE) {
591 spin_lock(&hif_dev->rx_lock);
592 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE;
593 hif_dev->rx_transfer_len =
594 MAX_RX_BUF_SIZE - chk_idx - 4;
595 hif_dev->rx_pad_len = pad_len;
596
597 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
598 if (!nskb) {
599 dev_err(&hif_dev->udev->dev,
600 "ath9k_htc: RX memory allocation error\n");
601 spin_unlock(&hif_dev->rx_lock);
602 goto err;
603 }
604 skb_reserve(nskb, 32);
605 RX_STAT_INC(skb_allocated);
606
607 memcpy(nskb->data, &(skb->data[chk_idx+4]),
608 hif_dev->rx_transfer_len);
609
610 /* Record the buffer pointer */
611 hif_dev->remain_skb = nskb;
612 spin_unlock(&hif_dev->rx_lock);
613 } else {
614 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
615 if (!nskb) {
616 dev_err(&hif_dev->udev->dev,
617 "ath9k_htc: RX memory allocation error\n");
618 goto err;
619 }
620 skb_reserve(nskb, 32);
621 RX_STAT_INC(skb_allocated);
622
623 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len);
624 skb_put(nskb, pkt_len);
625 skb_pool[pool_index++] = nskb;
626 }
627 }
628
629err:
630 for (i = 0; i < pool_index; i++) {
631 RX_STAT_ADD(skb_completed_bytes, skb_pool[i]->len);
632 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i],
633 skb_pool[i]->len, USB_WLAN_RX_PIPE);
634 RX_STAT_INC(skb_completed);
635 }
636}
637
638static void ath9k_hif_usb_rx_cb(struct urb *urb)
639{
640 struct sk_buff *skb = (struct sk_buff *) urb->context;
641 struct hif_device_usb *hif_dev =
642 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
643 int ret;
644
645 if (!skb)
646 return;
647
648 if (!hif_dev)
649 goto free;
650
651 switch (urb->status) {
652 case 0:
653 break;
654 case -ENOENT:
655 case -ECONNRESET:
656 case -ENODEV:
657 case -ESHUTDOWN:
658 goto free;
659 default:
660 goto resubmit;
661 }
662
663 if (likely(urb->actual_length != 0)) {
664 skb_put(skb, urb->actual_length);
665 ath9k_hif_usb_rx_stream(hif_dev, skb);
666 }
667
668resubmit:
669 skb_reset_tail_pointer(skb);
670 skb_trim(skb, 0);
671
672 usb_anchor_urb(urb, &hif_dev->rx_submitted);
673 ret = usb_submit_urb(urb, GFP_ATOMIC);
674 if (ret) {
675 usb_unanchor_urb(urb);
676 goto free;
677 }
678
679 return;
680free:
681 kfree_skb(skb);
682}
683
684static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
685{
686 struct sk_buff *skb = (struct sk_buff *) urb->context;
687 struct sk_buff *nskb;
688 struct hif_device_usb *hif_dev =
689 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
690 int ret;
691
692 if (!skb)
693 return;
694
695 if (!hif_dev)
696 goto free;
697
698 switch (urb->status) {
699 case 0:
700 break;
701 case -ENOENT:
702 case -ECONNRESET:
703 case -ENODEV:
704 case -ESHUTDOWN:
705 goto free;
706 default:
707 skb_reset_tail_pointer(skb);
708 skb_trim(skb, 0);
709
710 goto resubmit;
711 }
712
713 if (likely(urb->actual_length != 0)) {
714 skb_put(skb, urb->actual_length);
715
716 /* Process the command first */
717 ath9k_htc_rx_msg(hif_dev->htc_handle, skb,
718 skb->len, USB_REG_IN_PIPE);
719
720
721 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC);
722 if (!nskb) {
723 dev_err(&hif_dev->udev->dev,
724 "ath9k_htc: REG_IN memory allocation failure\n");
725 urb->context = NULL;
726 return;
727 }
728
729 usb_fill_int_urb(urb, hif_dev->udev,
730 usb_rcvintpipe(hif_dev->udev,
731 USB_REG_IN_PIPE),
732 nskb->data, MAX_REG_IN_BUF_SIZE,
733 ath9k_hif_usb_reg_in_cb, nskb, 1);
734 }
735
736resubmit:
737 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
738 ret = usb_submit_urb(urb, GFP_ATOMIC);
739 if (ret) {
740 usb_unanchor_urb(urb);
741 goto free;
742 }
743
744 return;
745free:
746 kfree_skb(skb);
747 urb->context = NULL;
748}
749
750static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
751{
752 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
753 unsigned long flags;
754
755 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
756 &hif_dev->tx.tx_buf, list) {
757 usb_kill_urb(tx_buf->urb);
758 list_del(&tx_buf->list);
759 usb_free_urb(tx_buf->urb);
760 kfree(tx_buf->buf);
761 kfree(tx_buf);
762 }
763
764 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
765 hif_dev->tx.flags |= HIF_USB_TX_FLUSH;
766 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
767
768 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
769 &hif_dev->tx.tx_pending, list) {
770 usb_kill_urb(tx_buf->urb);
771 list_del(&tx_buf->list);
772 usb_free_urb(tx_buf->urb);
773 kfree(tx_buf->buf);
774 kfree(tx_buf);
775 }
776
777 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
778}
779
780static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev)
781{
782 struct tx_buf *tx_buf;
783 int i;
784
785 INIT_LIST_HEAD(&hif_dev->tx.tx_buf);
786 INIT_LIST_HEAD(&hif_dev->tx.tx_pending);
787 spin_lock_init(&hif_dev->tx.tx_lock);
788 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue);
789 init_usb_anchor(&hif_dev->mgmt_submitted);
790
791 for (i = 0; i < MAX_TX_URB_NUM; i++) {
792 tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL);
793 if (!tx_buf)
794 goto err;
795
796 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL);
797 if (!tx_buf->buf)
798 goto err;
799
800 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL);
801 if (!tx_buf->urb)
802 goto err;
803
804 tx_buf->hif_dev = hif_dev;
805 __skb_queue_head_init(&tx_buf->skb_queue);
806
807 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
808 }
809
810 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM;
811
812 return 0;
813err:
814 if (tx_buf) {
815 kfree(tx_buf->buf);
816 kfree(tx_buf);
817 }
818 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
819 return -ENOMEM;
820}
821
822static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev)
823{
824 usb_kill_anchored_urbs(&hif_dev->rx_submitted);
825}
826
827static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
828{
829 struct urb *urb = NULL;
830 struct sk_buff *skb = NULL;
831 int i, ret;
832
833 init_usb_anchor(&hif_dev->rx_submitted);
834 spin_lock_init(&hif_dev->rx_lock);
835
836 for (i = 0; i < MAX_RX_URB_NUM; i++) {
837
838 /* Allocate URB */
839 urb = usb_alloc_urb(0, GFP_KERNEL);
840 if (urb == NULL) {
841 ret = -ENOMEM;
842 goto err_urb;
843 }
844
845 /* Allocate buffer */
846 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL);
847 if (!skb) {
848 ret = -ENOMEM;
849 goto err_skb;
850 }
851
852 usb_fill_bulk_urb(urb, hif_dev->udev,
853 usb_rcvbulkpipe(hif_dev->udev,
854 USB_WLAN_RX_PIPE),
855 skb->data, MAX_RX_BUF_SIZE,
856 ath9k_hif_usb_rx_cb, skb);
857
858 /* Anchor URB */
859 usb_anchor_urb(urb, &hif_dev->rx_submitted);
860
861 /* Submit URB */
862 ret = usb_submit_urb(urb, GFP_KERNEL);
863 if (ret) {
864 usb_unanchor_urb(urb);
865 goto err_submit;
866 }
867
868 /*
869 * Drop reference count.
870 * This ensures that the URB is freed when killing them.
871 */
872 usb_free_urb(urb);
873 }
874
875 return 0;
876
877err_submit:
878 kfree_skb(skb);
879err_skb:
880 usb_free_urb(urb);
881err_urb:
882 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
883 return ret;
884}
885
886static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev)
887{
888 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted);
889}
890
891static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev)
892{
893 struct urb *urb = NULL;
894 struct sk_buff *skb = NULL;
895 int i, ret;
896
897 init_usb_anchor(&hif_dev->reg_in_submitted);
898
899 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) {
900
901 /* Allocate URB */
902 urb = usb_alloc_urb(0, GFP_KERNEL);
903 if (urb == NULL) {
904 ret = -ENOMEM;
905 goto err_urb;
906 }
907
908 /* Allocate buffer */
909 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL);
910 if (!skb) {
911 ret = -ENOMEM;
912 goto err_skb;
913 }
914
915 usb_fill_int_urb(urb, hif_dev->udev,
916 usb_rcvintpipe(hif_dev->udev,
917 USB_REG_IN_PIPE),
918 skb->data, MAX_REG_IN_BUF_SIZE,
919 ath9k_hif_usb_reg_in_cb, skb, 1);
920
921 /* Anchor URB */
922 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
923
924 /* Submit URB */
925 ret = usb_submit_urb(urb, GFP_KERNEL);
926 if (ret) {
927 usb_unanchor_urb(urb);
928 goto err_submit;
929 }
930
931 /*
932 * Drop reference count.
933 * This ensures that the URB is freed when killing them.
934 */
935 usb_free_urb(urb);
936 }
937
938 return 0;
939
940err_submit:
941 kfree_skb(skb);
942err_skb:
943 usb_free_urb(urb);
944err_urb:
945 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
946 return ret;
947}
948
949static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev)
950{
951 /* Register Write */
952 init_usb_anchor(&hif_dev->regout_submitted);
953
954 /* TX */
955 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0)
956 goto err;
957
958 /* RX */
959 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0)
960 goto err_rx;
961
962 /* Register Read */
963 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0)
964 goto err_reg;
965
966 return 0;
967err_reg:
968 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
969err_rx:
970 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
971err:
972 return -ENOMEM;
973}
974
975static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev)
976{
977 usb_kill_anchored_urbs(&hif_dev->regout_submitted);
978 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
979 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
980 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
981}
982
983static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev)
984{
985 int transfer, err;
986 const void *data = hif_dev->fw_data;
987 size_t len = hif_dev->fw_size;
988 u32 addr = AR9271_FIRMWARE;
989 u8 *buf = kzalloc(4096, GFP_KERNEL);
990 u32 firm_offset;
991
992 if (!buf)
993 return -ENOMEM;
994
995 while (len) {
996 transfer = min_t(size_t, len, 4096);
997 memcpy(buf, data, transfer);
998
999 err = usb_control_msg(hif_dev->udev,
1000 usb_sndctrlpipe(hif_dev->udev, 0),
1001 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT,
1002 addr >> 8, 0, buf, transfer,
1003 USB_MSG_TIMEOUT);
1004 if (err < 0) {
1005 kfree(buf);
1006 return err;
1007 }
1008
1009 len -= transfer;
1010 data += transfer;
1011 addr += transfer;
1012 }
1013 kfree(buf);
1014
1015 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1016 firm_offset = AR7010_FIRMWARE_TEXT;
1017 else
1018 firm_offset = AR9271_FIRMWARE_TEXT;
1019
1020 /*
1021 * Issue FW download complete command to firmware.
1022 */
1023 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0),
1024 FIRMWARE_DOWNLOAD_COMP,
1025 0x40 | USB_DIR_OUT,
1026 firm_offset >> 8, 0, NULL, 0, USB_MSG_TIMEOUT);
1027 if (err)
1028 return -EIO;
1029
1030 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n",
1031 hif_dev->fw_name, (unsigned long) hif_dev->fw_size);
1032
1033 return 0;
1034}
1035
1036static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev)
1037{
1038 int ret;
1039
1040 ret = ath9k_hif_usb_download_fw(hif_dev);
1041 if (ret) {
1042 dev_err(&hif_dev->udev->dev,
1043 "ath9k_htc: Firmware - %s download failed\n",
1044 hif_dev->fw_name);
1045 return ret;
1046 }
1047
1048 /* Alloc URBs */
1049 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1050 if (ret) {
1051 dev_err(&hif_dev->udev->dev,
1052 "ath9k_htc: Unable to allocate URBs\n");
1053 return ret;
1054 }
1055
1056 return 0;
1057}
1058
1059static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev)
1060{
1061 ath9k_hif_usb_dealloc_urbs(hif_dev);
1062}
1063
1064/*
1065 * If initialization fails or the FW cannot be retrieved,
1066 * detach the device.
1067 */
1068static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev)
1069{
1070 struct device *dev = &hif_dev->udev->dev;
1071 struct device *parent = dev->parent;
1072
1073 complete_all(&hif_dev->fw_done);
1074
1075 if (parent)
1076 device_lock(parent);
1077
1078 device_release_driver(dev);
1079
1080 if (parent)
1081 device_unlock(parent);
1082}
1083
1084static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context);
1085
1086/* taken from iwlwifi */
1087static int ath9k_hif_request_firmware(struct hif_device_usb *hif_dev,
1088 bool first)
1089{
1090 char index[8], *chip;
1091 int ret;
1092
1093 if (first) {
1094 if (htc_use_dev_fw) {
1095 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX + 1;
1096 sprintf(index, "%s", "dev");
1097 } else {
1098 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX;
1099 sprintf(index, "%d", hif_dev->fw_minor_index);
1100 }
1101 } else {
1102 hif_dev->fw_minor_index--;
1103 sprintf(index, "%d", hif_dev->fw_minor_index);
1104 }
1105
1106 /* test for FW 1.3 */
1107 if (MAJOR_VERSION_REQ == 1 && hif_dev->fw_minor_index == 3) {
1108 const char *filename;
1109
1110 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1111 filename = FIRMWARE_AR7010_1_1;
1112 else
1113 filename = FIRMWARE_AR9271;
1114
1115 /* expected fw locations:
1116 * - htc_9271.fw (stable version 1.3, depricated)
1117 */
1118 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name),
1119 "%s", filename);
1120
1121 } else if (hif_dev->fw_minor_index < FIRMWARE_MINOR_IDX_MIN) {
1122 dev_err(&hif_dev->udev->dev, "no suitable firmware found!\n");
1123
1124 return -ENOENT;
1125 } else {
1126 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1127 chip = "7010";
1128 else
1129 chip = "9271";
1130
1131 /* expected fw locations:
1132 * - ath9k_htc/htc_9271-1.dev.0.fw (development version)
1133 * - ath9k_htc/htc_9271-1.4.0.fw (stable version)
1134 */
1135 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name),
1136 "%s/htc_%s-%d.%s.0.fw", HTC_FW_PATH,
1137 chip, MAJOR_VERSION_REQ, index);
1138 }
1139
1140 ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name,
1141 &hif_dev->udev->dev, GFP_KERNEL,
1142 hif_dev, ath9k_hif_usb_firmware_cb);
1143 if (ret) {
1144 dev_err(&hif_dev->udev->dev,
1145 "ath9k_htc: Async request for firmware %s failed\n",
1146 hif_dev->fw_name);
1147 return ret;
1148 }
1149
1150 dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n",
1151 hif_dev->fw_name);
1152
1153 return ret;
1154}
1155
1156static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context)
1157{
1158 struct hif_device_usb *hif_dev = context;
1159 int ret;
1160
1161 if (!fw) {
1162 ret = ath9k_hif_request_firmware(hif_dev, false);
1163 if (!ret)
1164 return;
1165
1166 dev_err(&hif_dev->udev->dev,
1167 "ath9k_htc: Failed to get firmware %s\n",
1168 hif_dev->fw_name);
1169 goto err_fw;
1170 }
1171
1172 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb,
1173 &hif_dev->udev->dev);
1174 if (hif_dev->htc_handle == NULL)
1175 goto err_dev_alloc;
1176
1177 hif_dev->fw_data = fw->data;
1178 hif_dev->fw_size = fw->size;
1179
1180 /* Proceed with initialization */
1181
1182 ret = ath9k_hif_usb_dev_init(hif_dev);
1183 if (ret)
1184 goto err_dev_init;
1185
1186 ret = ath9k_htc_hw_init(hif_dev->htc_handle,
1187 &hif_dev->interface->dev,
1188 hif_dev->usb_device_id->idProduct,
1189 hif_dev->udev->product,
1190 hif_dev->usb_device_id->driver_info);
1191 if (ret) {
1192 ret = -EINVAL;
1193 goto err_htc_hw_init;
1194 }
1195
1196 release_firmware(fw);
1197 hif_dev->flags |= HIF_USB_READY;
1198 complete_all(&hif_dev->fw_done);
1199
1200 return;
1201
1202err_htc_hw_init:
1203 ath9k_hif_usb_dev_deinit(hif_dev);
1204err_dev_init:
1205 ath9k_htc_hw_free(hif_dev->htc_handle);
1206err_dev_alloc:
1207 release_firmware(fw);
1208err_fw:
1209 ath9k_hif_usb_firmware_fail(hif_dev);
1210}
1211
1212/*
1213 * An exact copy of the function from zd1211rw.
1214 */
1215static int send_eject_command(struct usb_interface *interface)
1216{
1217 struct usb_device *udev = interface_to_usbdev(interface);
1218 struct usb_host_interface *iface_desc = &interface->altsetting[0];
1219 struct usb_endpoint_descriptor *endpoint;
1220 unsigned char *cmd;
1221 u8 bulk_out_ep;
1222 int r;
1223
1224 if (iface_desc->desc.bNumEndpoints < 2)
1225 return -ENODEV;
1226
1227 /* Find bulk out endpoint */
1228 for (r = 1; r >= 0; r--) {
1229 endpoint = &iface_desc->endpoint[r].desc;
1230 if (usb_endpoint_dir_out(endpoint) &&
1231 usb_endpoint_xfer_bulk(endpoint)) {
1232 bulk_out_ep = endpoint->bEndpointAddress;
1233 break;
1234 }
1235 }
1236 if (r == -1) {
1237 dev_err(&udev->dev,
1238 "ath9k_htc: Could not find bulk out endpoint\n");
1239 return -ENODEV;
1240 }
1241
1242 cmd = kzalloc(31, GFP_KERNEL);
1243 if (cmd == NULL)
1244 return -ENODEV;
1245
1246 /* USB bulk command block */
1247 cmd[0] = 0x55; /* bulk command signature */
1248 cmd[1] = 0x53; /* bulk command signature */
1249 cmd[2] = 0x42; /* bulk command signature */
1250 cmd[3] = 0x43; /* bulk command signature */
1251 cmd[14] = 6; /* command length */
1252
1253 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
1254 cmd[19] = 0x2; /* eject disc */
1255
1256 dev_info(&udev->dev, "Ejecting storage device...\n");
1257 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
1258 cmd, 31, NULL, 2 * USB_MSG_TIMEOUT);
1259 kfree(cmd);
1260 if (r)
1261 return r;
1262
1263 /* At this point, the device disconnects and reconnects with the real
1264 * ID numbers. */
1265
1266 usb_set_intfdata(interface, NULL);
1267 return 0;
1268}
1269
1270static int ath9k_hif_usb_probe(struct usb_interface *interface,
1271 const struct usb_device_id *id)
1272{
1273 struct usb_device *udev = interface_to_usbdev(interface);
1274 struct hif_device_usb *hif_dev;
1275 int ret = 0;
1276
1277 if (id->driver_info == STORAGE_DEVICE)
1278 return send_eject_command(interface);
1279
1280 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL);
1281 if (!hif_dev) {
1282 ret = -ENOMEM;
1283 goto err_alloc;
1284 }
1285
1286 usb_get_dev(udev);
1287
1288 hif_dev->udev = udev;
1289 hif_dev->interface = interface;
1290 hif_dev->usb_device_id = id;
1291#ifdef CONFIG_PM
1292 udev->reset_resume = 1;
1293#endif
1294 usb_set_intfdata(interface, hif_dev);
1295
1296 init_completion(&hif_dev->fw_done);
1297
1298 ret = ath9k_hif_request_firmware(hif_dev, true);
1299 if (ret)
1300 goto err_fw_req;
1301
1302 return ret;
1303
1304err_fw_req:
1305 usb_set_intfdata(interface, NULL);
1306 kfree(hif_dev);
1307 usb_put_dev(udev);
1308err_alloc:
1309 return ret;
1310}
1311
1312static void ath9k_hif_usb_reboot(struct usb_device *udev)
1313{
1314 u32 reboot_cmd = 0xffffffff;
1315 void *buf;
1316 int ret;
1317
1318 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL);
1319 if (!buf)
1320 return;
1321
1322 ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE),
1323 buf, 4, NULL, USB_MSG_TIMEOUT);
1324 if (ret)
1325 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
1326
1327 kfree(buf);
1328}
1329
1330static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
1331{
1332 struct usb_device *udev = interface_to_usbdev(interface);
1333 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1334 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false;
1335
1336 if (!hif_dev)
1337 return;
1338
1339 wait_for_completion(&hif_dev->fw_done);
1340
1341 if (hif_dev->flags & HIF_USB_READY) {
1342 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged);
1343 ath9k_htc_hw_free(hif_dev->htc_handle);
1344 ath9k_hif_usb_dev_deinit(hif_dev);
1345 }
1346
1347 usb_set_intfdata(interface, NULL);
1348
1349 /* If firmware was loaded we should drop it
1350 * go back to first stage bootloader. */
1351 if (!unplugged && (hif_dev->flags & HIF_USB_READY))
1352 ath9k_hif_usb_reboot(udev);
1353
1354 kfree(hif_dev);
1355 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");
1356 usb_put_dev(udev);
1357}
1358
1359#ifdef CONFIG_PM
1360static int ath9k_hif_usb_suspend(struct usb_interface *interface,
1361 pm_message_t message)
1362{
1363 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1364
1365 /*
1366 * The device has to be set to FULLSLEEP mode in case no
1367 * interface is up.
1368 */
1369 if (!(hif_dev->flags & HIF_USB_START))
1370 ath9k_htc_suspend(hif_dev->htc_handle);
1371
1372 wait_for_completion(&hif_dev->fw_done);
1373
1374 if (hif_dev->flags & HIF_USB_READY)
1375 ath9k_hif_usb_dealloc_urbs(hif_dev);
1376
1377 return 0;
1378}
1379
1380static int ath9k_hif_usb_resume(struct usb_interface *interface)
1381{
1382 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1383 struct htc_target *htc_handle = hif_dev->htc_handle;
1384 int ret;
1385 const struct firmware *fw;
1386
1387 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1388 if (ret)
1389 return ret;
1390
1391 if (hif_dev->flags & HIF_USB_READY) {
1392 /* request cached firmware during suspend/resume cycle */
1393 ret = request_firmware(&fw, hif_dev->fw_name,
1394 &hif_dev->udev->dev);
1395 if (ret)
1396 goto fail_resume;
1397
1398 hif_dev->fw_data = fw->data;
1399 hif_dev->fw_size = fw->size;
1400 ret = ath9k_hif_usb_download_fw(hif_dev);
1401 release_firmware(fw);
1402 if (ret)
1403 goto fail_resume;
1404 } else {
1405 ath9k_hif_usb_dealloc_urbs(hif_dev);
1406 return -EIO;
1407 }
1408
1409 mdelay(100);
1410
1411 ret = ath9k_htc_resume(htc_handle);
1412
1413 if (ret)
1414 goto fail_resume;
1415
1416 return 0;
1417
1418fail_resume:
1419 ath9k_hif_usb_dealloc_urbs(hif_dev);
1420
1421 return ret;
1422}
1423#endif
1424
1425static struct usb_driver ath9k_hif_usb_driver = {
1426 .name = KBUILD_MODNAME,
1427 .probe = ath9k_hif_usb_probe,
1428 .disconnect = ath9k_hif_usb_disconnect,
1429#ifdef CONFIG_PM
1430 .suspend = ath9k_hif_usb_suspend,
1431 .resume = ath9k_hif_usb_resume,
1432 .reset_resume = ath9k_hif_usb_resume,
1433#endif
1434 .id_table = ath9k_hif_usb_ids,
1435 .soft_unbind = 1,
1436 .disable_hub_initiated_lpm = 1,
1437};
1438
1439int ath9k_hif_usb_init(void)
1440{
1441 return usb_register(&ath9k_hif_usb_driver);
1442}
1443
1444void ath9k_hif_usb_exit(void)
1445{
1446 usb_deregister(&ath9k_hif_usb_driver);
1447}