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[mirror_ubuntu-bionic-kernel.git] / drivers / net / wireless / ath / ath9k / hif_usb.c
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 MODULE_FIRMWARE(HTC_7010_MODULE_FW);
21 MODULE_FIRMWARE(HTC_9271_MODULE_FW);
22
23 static 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(0x07D1, 0x3A10) }, /* Dlink Wireless 150 */
28 { USB_DEVICE(0x13D3, 0x3327) }, /* Azurewave */
29 { USB_DEVICE(0x13D3, 0x3328) }, /* Azurewave */
30 { USB_DEVICE(0x13D3, 0x3346) }, /* IMC Networks */
31 { USB_DEVICE(0x13D3, 0x3348) }, /* Azurewave */
32 { USB_DEVICE(0x13D3, 0x3349) }, /* Azurewave */
33 { USB_DEVICE(0x13D3, 0x3350) }, /* Azurewave */
34 { USB_DEVICE(0x04CA, 0x4605) }, /* Liteon */
35 { USB_DEVICE(0x040D, 0x3801) }, /* VIA */
36 { USB_DEVICE(0x0cf3, 0xb003) }, /* Ubiquiti WifiStation Ext */
37 { USB_DEVICE(0x0cf3, 0xb002) }, /* Ubiquiti WifiStation */
38 { USB_DEVICE(0x057c, 0x8403) }, /* AVM FRITZ!WLAN 11N v2 USB */
39 { USB_DEVICE(0x0471, 0x209e) }, /* Philips (or NXP) PTA01 */
40 { USB_DEVICE(0x1eda, 0x2315) }, /* AirTies */
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 { USB_DEVICE(0x0411, 0x0197),
56 .driver_info = AR9280_USB }, /* Buffalo WLI-UV-AG300P */
57 { USB_DEVICE(0x04da, 0x3904),
58 .driver_info = AR9280_USB },
59 { USB_DEVICE(0x0930, 0x0a08),
60 .driver_info = AR9280_USB }, /* Toshiba WLM-20U2 and GN-1080 */
61
62 { USB_DEVICE(0x0cf3, 0x20ff),
63 .driver_info = STORAGE_DEVICE },
64
65 { },
66 };
67
68 MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids);
69
70 static int __hif_usb_tx(struct hif_device_usb *hif_dev);
71
72 static void hif_usb_regout_cb(struct urb *urb)
73 {
74 struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
75
76 switch (urb->status) {
77 case 0:
78 break;
79 case -ENOENT:
80 case -ECONNRESET:
81 case -ENODEV:
82 case -ESHUTDOWN:
83 goto free;
84 default:
85 break;
86 }
87
88 if (cmd) {
89 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
90 cmd->skb, true);
91 kfree(cmd);
92 }
93
94 return;
95 free:
96 kfree_skb(cmd->skb);
97 kfree(cmd);
98 }
99
100 static int hif_usb_send_regout(struct hif_device_usb *hif_dev,
101 struct sk_buff *skb)
102 {
103 struct urb *urb;
104 struct cmd_buf *cmd;
105 int ret = 0;
106
107 urb = usb_alloc_urb(0, GFP_KERNEL);
108 if (urb == NULL)
109 return -ENOMEM;
110
111 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
112 if (cmd == NULL) {
113 usb_free_urb(urb);
114 return -ENOMEM;
115 }
116
117 cmd->skb = skb;
118 cmd->hif_dev = hif_dev;
119
120 usb_fill_int_urb(urb, hif_dev->udev,
121 usb_sndintpipe(hif_dev->udev, USB_REG_OUT_PIPE),
122 skb->data, skb->len,
123 hif_usb_regout_cb, cmd, 1);
124
125 usb_anchor_urb(urb, &hif_dev->regout_submitted);
126 ret = usb_submit_urb(urb, GFP_KERNEL);
127 if (ret) {
128 usb_unanchor_urb(urb);
129 kfree(cmd);
130 }
131 usb_free_urb(urb);
132
133 return ret;
134 }
135
136 static void hif_usb_mgmt_cb(struct urb *urb)
137 {
138 struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
139 struct hif_device_usb *hif_dev;
140 bool txok = true;
141
142 if (!cmd || !cmd->skb || !cmd->hif_dev)
143 return;
144
145 hif_dev = cmd->hif_dev;
146
147 switch (urb->status) {
148 case 0:
149 break;
150 case -ENOENT:
151 case -ECONNRESET:
152 case -ENODEV:
153 case -ESHUTDOWN:
154 txok = false;
155
156 /*
157 * If the URBs are being flushed, no need to complete
158 * this packet.
159 */
160 spin_lock(&hif_dev->tx.tx_lock);
161 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) {
162 spin_unlock(&hif_dev->tx.tx_lock);
163 dev_kfree_skb_any(cmd->skb);
164 kfree(cmd);
165 return;
166 }
167 spin_unlock(&hif_dev->tx.tx_lock);
168
169 break;
170 default:
171 txok = false;
172 break;
173 }
174
175 skb_pull(cmd->skb, 4);
176 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
177 cmd->skb, txok);
178 kfree(cmd);
179 }
180
181 static int hif_usb_send_mgmt(struct hif_device_usb *hif_dev,
182 struct sk_buff *skb)
183 {
184 struct urb *urb;
185 struct cmd_buf *cmd;
186 int ret = 0;
187 __le16 *hdr;
188
189 urb = usb_alloc_urb(0, GFP_ATOMIC);
190 if (urb == NULL)
191 return -ENOMEM;
192
193 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
194 if (cmd == NULL) {
195 usb_free_urb(urb);
196 return -ENOMEM;
197 }
198
199 cmd->skb = skb;
200 cmd->hif_dev = hif_dev;
201
202 hdr = skb_push(skb, 4);
203 *hdr++ = cpu_to_le16(skb->len - 4);
204 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG);
205
206 usb_fill_bulk_urb(urb, hif_dev->udev,
207 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
208 skb->data, skb->len,
209 hif_usb_mgmt_cb, cmd);
210
211 usb_anchor_urb(urb, &hif_dev->mgmt_submitted);
212 ret = usb_submit_urb(urb, GFP_ATOMIC);
213 if (ret) {
214 usb_unanchor_urb(urb);
215 kfree(cmd);
216 }
217 usb_free_urb(urb);
218
219 return ret;
220 }
221
222 static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev,
223 struct sk_buff_head *list)
224 {
225 struct sk_buff *skb;
226
227 while ((skb = __skb_dequeue(list)) != NULL) {
228 dev_kfree_skb_any(skb);
229 }
230 }
231
232 static inline void ath9k_skb_queue_complete(struct hif_device_usb *hif_dev,
233 struct sk_buff_head *queue,
234 bool txok)
235 {
236 struct sk_buff *skb;
237
238 while ((skb = __skb_dequeue(queue)) != NULL) {
239 #ifdef CONFIG_ATH9K_HTC_DEBUGFS
240 int ln = skb->len;
241 #endif
242 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
243 skb, txok);
244 if (txok) {
245 TX_STAT_INC(skb_success);
246 TX_STAT_ADD(skb_success_bytes, ln);
247 }
248 else
249 TX_STAT_INC(skb_failed);
250 }
251 }
252
253 static void hif_usb_tx_cb(struct urb *urb)
254 {
255 struct tx_buf *tx_buf = (struct tx_buf *) urb->context;
256 struct hif_device_usb *hif_dev;
257 bool txok = true;
258
259 if (!tx_buf || !tx_buf->hif_dev)
260 return;
261
262 hif_dev = tx_buf->hif_dev;
263
264 switch (urb->status) {
265 case 0:
266 break;
267 case -ENOENT:
268 case -ECONNRESET:
269 case -ENODEV:
270 case -ESHUTDOWN:
271 txok = false;
272
273 /*
274 * If the URBs are being flushed, no need to add this
275 * URB to the free list.
276 */
277 spin_lock(&hif_dev->tx.tx_lock);
278 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) {
279 spin_unlock(&hif_dev->tx.tx_lock);
280 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
281 return;
282 }
283 spin_unlock(&hif_dev->tx.tx_lock);
284
285 break;
286 default:
287 txok = false;
288 break;
289 }
290
291 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, txok);
292
293 /* Re-initialize the SKB queue */
294 tx_buf->len = tx_buf->offset = 0;
295 __skb_queue_head_init(&tx_buf->skb_queue);
296
297 /* Add this TX buffer to the free list */
298 spin_lock(&hif_dev->tx.tx_lock);
299 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
300 hif_dev->tx.tx_buf_cnt++;
301 if (!(hif_dev->tx.flags & HIF_USB_TX_STOP))
302 __hif_usb_tx(hif_dev); /* Check for pending SKBs */
303 TX_STAT_INC(buf_completed);
304 spin_unlock(&hif_dev->tx.tx_lock);
305 }
306
307 /* TX lock has to be taken */
308 static int __hif_usb_tx(struct hif_device_usb *hif_dev)
309 {
310 struct tx_buf *tx_buf = NULL;
311 struct sk_buff *nskb = NULL;
312 int ret = 0, i;
313 u16 tx_skb_cnt = 0;
314 u8 *buf;
315 __le16 *hdr;
316
317 if (hif_dev->tx.tx_skb_cnt == 0)
318 return 0;
319
320 /* Check if a free TX buffer is available */
321 if (list_empty(&hif_dev->tx.tx_buf))
322 return 0;
323
324 tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list);
325 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending);
326 hif_dev->tx.tx_buf_cnt--;
327
328 tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM);
329
330 for (i = 0; i < tx_skb_cnt; i++) {
331 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue);
332
333 /* Should never be NULL */
334 BUG_ON(!nskb);
335
336 hif_dev->tx.tx_skb_cnt--;
337
338 buf = tx_buf->buf;
339 buf += tx_buf->offset;
340 hdr = (__le16 *)buf;
341 *hdr++ = cpu_to_le16(nskb->len);
342 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG);
343 buf += 4;
344 memcpy(buf, nskb->data, nskb->len);
345 tx_buf->len = nskb->len + 4;
346
347 if (i < (tx_skb_cnt - 1))
348 tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4;
349
350 if (i == (tx_skb_cnt - 1))
351 tx_buf->len += tx_buf->offset;
352
353 __skb_queue_tail(&tx_buf->skb_queue, nskb);
354 TX_STAT_INC(skb_queued);
355 }
356
357 usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev,
358 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
359 tx_buf->buf, tx_buf->len,
360 hif_usb_tx_cb, tx_buf);
361
362 ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC);
363 if (ret) {
364 tx_buf->len = tx_buf->offset = 0;
365 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, false);
366 __skb_queue_head_init(&tx_buf->skb_queue);
367 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
368 hif_dev->tx.tx_buf_cnt++;
369 }
370
371 if (!ret)
372 TX_STAT_INC(buf_queued);
373
374 return ret;
375 }
376
377 static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb)
378 {
379 struct ath9k_htc_tx_ctl *tx_ctl;
380 unsigned long flags;
381 int ret = 0;
382
383 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
384
385 if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
386 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
387 return -ENODEV;
388 }
389
390 /* Check if the max queue count has been reached */
391 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) {
392 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
393 return -ENOMEM;
394 }
395
396 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
397
398 tx_ctl = HTC_SKB_CB(skb);
399
400 /* Mgmt/Beacon frames don't use the TX buffer pool */
401 if ((tx_ctl->type == ATH9K_HTC_MGMT) ||
402 (tx_ctl->type == ATH9K_HTC_BEACON)) {
403 ret = hif_usb_send_mgmt(hif_dev, skb);
404 }
405
406 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
407
408 if ((tx_ctl->type == ATH9K_HTC_NORMAL) ||
409 (tx_ctl->type == ATH9K_HTC_AMPDU)) {
410 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb);
411 hif_dev->tx.tx_skb_cnt++;
412 }
413
414 /* Check if AMPDUs have to be sent immediately */
415 if ((hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) &&
416 (hif_dev->tx.tx_skb_cnt < 2)) {
417 __hif_usb_tx(hif_dev);
418 }
419
420 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
421
422 return ret;
423 }
424
425 static void hif_usb_start(void *hif_handle)
426 {
427 struct hif_device_usb *hif_dev = hif_handle;
428 unsigned long flags;
429
430 hif_dev->flags |= HIF_USB_START;
431
432 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
433 hif_dev->tx.flags &= ~HIF_USB_TX_STOP;
434 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
435 }
436
437 static void hif_usb_stop(void *hif_handle)
438 {
439 struct hif_device_usb *hif_dev = hif_handle;
440 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
441 unsigned long flags;
442
443 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
444 ath9k_skb_queue_complete(hif_dev, &hif_dev->tx.tx_skb_queue, false);
445 hif_dev->tx.tx_skb_cnt = 0;
446 hif_dev->tx.flags |= HIF_USB_TX_STOP;
447 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
448
449 /* The pending URBs have to be canceled. */
450 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
451 &hif_dev->tx.tx_pending, list) {
452 usb_kill_urb(tx_buf->urb);
453 }
454
455 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
456 }
457
458 static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb)
459 {
460 struct hif_device_usb *hif_dev = hif_handle;
461 int ret = 0;
462
463 switch (pipe_id) {
464 case USB_WLAN_TX_PIPE:
465 ret = hif_usb_send_tx(hif_dev, skb);
466 break;
467 case USB_REG_OUT_PIPE:
468 ret = hif_usb_send_regout(hif_dev, skb);
469 break;
470 default:
471 dev_err(&hif_dev->udev->dev,
472 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id);
473 ret = -EINVAL;
474 break;
475 }
476
477 return ret;
478 }
479
480 static inline bool check_index(struct sk_buff *skb, u8 idx)
481 {
482 struct ath9k_htc_tx_ctl *tx_ctl;
483
484 tx_ctl = HTC_SKB_CB(skb);
485
486 if ((tx_ctl->type == ATH9K_HTC_AMPDU) &&
487 (tx_ctl->sta_idx == idx))
488 return true;
489
490 return false;
491 }
492
493 static void hif_usb_sta_drain(void *hif_handle, u8 idx)
494 {
495 struct hif_device_usb *hif_dev = hif_handle;
496 struct sk_buff *skb, *tmp;
497 unsigned long flags;
498
499 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
500
501 skb_queue_walk_safe(&hif_dev->tx.tx_skb_queue, skb, tmp) {
502 if (check_index(skb, idx)) {
503 __skb_unlink(skb, &hif_dev->tx.tx_skb_queue);
504 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
505 skb, false);
506 hif_dev->tx.tx_skb_cnt--;
507 TX_STAT_INC(skb_failed);
508 }
509 }
510
511 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
512 }
513
514 static struct ath9k_htc_hif hif_usb = {
515 .transport = ATH9K_HIF_USB,
516 .name = "ath9k_hif_usb",
517
518 .control_ul_pipe = USB_REG_OUT_PIPE,
519 .control_dl_pipe = USB_REG_IN_PIPE,
520
521 .start = hif_usb_start,
522 .stop = hif_usb_stop,
523 .sta_drain = hif_usb_sta_drain,
524 .send = hif_usb_send,
525 };
526
527 static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev,
528 struct sk_buff *skb)
529 {
530 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER];
531 int index = 0, i, len = skb->len;
532 int rx_remain_len, rx_pkt_len;
533 u16 pool_index = 0;
534 u8 *ptr;
535
536 spin_lock(&hif_dev->rx_lock);
537
538 rx_remain_len = hif_dev->rx_remain_len;
539 rx_pkt_len = hif_dev->rx_transfer_len;
540
541 if (rx_remain_len != 0) {
542 struct sk_buff *remain_skb = hif_dev->remain_skb;
543
544 if (remain_skb) {
545 ptr = (u8 *) remain_skb->data;
546
547 index = rx_remain_len;
548 rx_remain_len -= hif_dev->rx_pad_len;
549 ptr += rx_pkt_len;
550
551 memcpy(ptr, skb->data, rx_remain_len);
552
553 rx_pkt_len += rx_remain_len;
554 hif_dev->rx_remain_len = 0;
555 skb_put(remain_skb, rx_pkt_len);
556
557 skb_pool[pool_index++] = remain_skb;
558
559 } else {
560 index = rx_remain_len;
561 }
562 }
563
564 spin_unlock(&hif_dev->rx_lock);
565
566 while (index < len) {
567 u16 pkt_len;
568 u16 pkt_tag;
569 u16 pad_len;
570 int chk_idx;
571
572 ptr = (u8 *) skb->data;
573
574 pkt_len = get_unaligned_le16(ptr + index);
575 pkt_tag = get_unaligned_le16(ptr + index + 2);
576
577 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) {
578 RX_STAT_INC(skb_dropped);
579 return;
580 }
581
582 pad_len = 4 - (pkt_len & 0x3);
583 if (pad_len == 4)
584 pad_len = 0;
585
586 chk_idx = index;
587 index = index + 4 + pkt_len + pad_len;
588
589 if (index > MAX_RX_BUF_SIZE) {
590 spin_lock(&hif_dev->rx_lock);
591 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE;
592 hif_dev->rx_transfer_len =
593 MAX_RX_BUF_SIZE - chk_idx - 4;
594 hif_dev->rx_pad_len = pad_len;
595
596 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
597 if (!nskb) {
598 dev_err(&hif_dev->udev->dev,
599 "ath9k_htc: RX memory allocation error\n");
600 spin_unlock(&hif_dev->rx_lock);
601 goto err;
602 }
603 skb_reserve(nskb, 32);
604 RX_STAT_INC(skb_allocated);
605
606 memcpy(nskb->data, &(skb->data[chk_idx+4]),
607 hif_dev->rx_transfer_len);
608
609 /* Record the buffer pointer */
610 hif_dev->remain_skb = nskb;
611 spin_unlock(&hif_dev->rx_lock);
612 } else {
613 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
614 if (!nskb) {
615 dev_err(&hif_dev->udev->dev,
616 "ath9k_htc: RX memory allocation error\n");
617 goto err;
618 }
619 skb_reserve(nskb, 32);
620 RX_STAT_INC(skb_allocated);
621
622 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len);
623 skb_put(nskb, pkt_len);
624 skb_pool[pool_index++] = nskb;
625 }
626 }
627
628 err:
629 for (i = 0; i < pool_index; i++) {
630 RX_STAT_ADD(skb_completed_bytes, skb_pool[i]->len);
631 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i],
632 skb_pool[i]->len, USB_WLAN_RX_PIPE);
633 RX_STAT_INC(skb_completed);
634 }
635 }
636
637 static void ath9k_hif_usb_rx_cb(struct urb *urb)
638 {
639 struct sk_buff *skb = (struct sk_buff *) urb->context;
640 struct hif_device_usb *hif_dev =
641 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
642 int ret;
643
644 if (!skb)
645 return;
646
647 if (!hif_dev)
648 goto free;
649
650 switch (urb->status) {
651 case 0:
652 break;
653 case -ENOENT:
654 case -ECONNRESET:
655 case -ENODEV:
656 case -ESHUTDOWN:
657 goto free;
658 default:
659 goto resubmit;
660 }
661
662 if (likely(urb->actual_length != 0)) {
663 skb_put(skb, urb->actual_length);
664 ath9k_hif_usb_rx_stream(hif_dev, skb);
665 }
666
667 resubmit:
668 skb_reset_tail_pointer(skb);
669 skb_trim(skb, 0);
670
671 usb_anchor_urb(urb, &hif_dev->rx_submitted);
672 ret = usb_submit_urb(urb, GFP_ATOMIC);
673 if (ret) {
674 usb_unanchor_urb(urb);
675 goto free;
676 }
677
678 return;
679 free:
680 kfree_skb(skb);
681 }
682
683 static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
684 {
685 struct sk_buff *skb = (struct sk_buff *) urb->context;
686 struct sk_buff *nskb;
687 struct hif_device_usb *hif_dev =
688 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
689 int ret;
690
691 if (!skb)
692 return;
693
694 if (!hif_dev)
695 goto free;
696
697 switch (urb->status) {
698 case 0:
699 break;
700 case -ENOENT:
701 case -ECONNRESET:
702 case -ENODEV:
703 case -ESHUTDOWN:
704 goto free;
705 default:
706 skb_reset_tail_pointer(skb);
707 skb_trim(skb, 0);
708
709 goto resubmit;
710 }
711
712 if (likely(urb->actual_length != 0)) {
713 skb_put(skb, urb->actual_length);
714
715 /* Process the command first */
716 ath9k_htc_rx_msg(hif_dev->htc_handle, skb,
717 skb->len, USB_REG_IN_PIPE);
718
719
720 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC);
721 if (!nskb) {
722 dev_err(&hif_dev->udev->dev,
723 "ath9k_htc: REG_IN memory allocation failure\n");
724 urb->context = NULL;
725 return;
726 }
727
728 usb_fill_int_urb(urb, hif_dev->udev,
729 usb_rcvintpipe(hif_dev->udev,
730 USB_REG_IN_PIPE),
731 nskb->data, MAX_REG_IN_BUF_SIZE,
732 ath9k_hif_usb_reg_in_cb, nskb, 1);
733 }
734
735 resubmit:
736 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
737 ret = usb_submit_urb(urb, GFP_ATOMIC);
738 if (ret) {
739 usb_unanchor_urb(urb);
740 goto free;
741 }
742
743 return;
744 free:
745 kfree_skb(skb);
746 urb->context = NULL;
747 }
748
749 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
750 {
751 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
752 unsigned long flags;
753
754 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
755 &hif_dev->tx.tx_buf, list) {
756 usb_kill_urb(tx_buf->urb);
757 list_del(&tx_buf->list);
758 usb_free_urb(tx_buf->urb);
759 kfree(tx_buf->buf);
760 kfree(tx_buf);
761 }
762
763 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
764 hif_dev->tx.flags |= HIF_USB_TX_FLUSH;
765 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
766
767 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
768 &hif_dev->tx.tx_pending, list) {
769 usb_kill_urb(tx_buf->urb);
770 list_del(&tx_buf->list);
771 usb_free_urb(tx_buf->urb);
772 kfree(tx_buf->buf);
773 kfree(tx_buf);
774 }
775
776 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
777 }
778
779 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev)
780 {
781 struct tx_buf *tx_buf;
782 int i;
783
784 INIT_LIST_HEAD(&hif_dev->tx.tx_buf);
785 INIT_LIST_HEAD(&hif_dev->tx.tx_pending);
786 spin_lock_init(&hif_dev->tx.tx_lock);
787 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue);
788 init_usb_anchor(&hif_dev->mgmt_submitted);
789
790 for (i = 0; i < MAX_TX_URB_NUM; i++) {
791 tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL);
792 if (!tx_buf)
793 goto err;
794
795 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL);
796 if (!tx_buf->buf)
797 goto err;
798
799 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL);
800 if (!tx_buf->urb)
801 goto err;
802
803 tx_buf->hif_dev = hif_dev;
804 __skb_queue_head_init(&tx_buf->skb_queue);
805
806 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
807 }
808
809 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM;
810
811 return 0;
812 err:
813 if (tx_buf) {
814 kfree(tx_buf->buf);
815 kfree(tx_buf);
816 }
817 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
818 return -ENOMEM;
819 }
820
821 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev)
822 {
823 usb_kill_anchored_urbs(&hif_dev->rx_submitted);
824 }
825
826 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
827 {
828 struct urb *urb = NULL;
829 struct sk_buff *skb = NULL;
830 int i, ret;
831
832 init_usb_anchor(&hif_dev->rx_submitted);
833 spin_lock_init(&hif_dev->rx_lock);
834
835 for (i = 0; i < MAX_RX_URB_NUM; i++) {
836
837 /* Allocate URB */
838 urb = usb_alloc_urb(0, GFP_KERNEL);
839 if (urb == NULL) {
840 ret = -ENOMEM;
841 goto err_urb;
842 }
843
844 /* Allocate buffer */
845 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL);
846 if (!skb) {
847 ret = -ENOMEM;
848 goto err_skb;
849 }
850
851 usb_fill_bulk_urb(urb, hif_dev->udev,
852 usb_rcvbulkpipe(hif_dev->udev,
853 USB_WLAN_RX_PIPE),
854 skb->data, MAX_RX_BUF_SIZE,
855 ath9k_hif_usb_rx_cb, skb);
856
857 /* Anchor URB */
858 usb_anchor_urb(urb, &hif_dev->rx_submitted);
859
860 /* Submit URB */
861 ret = usb_submit_urb(urb, GFP_KERNEL);
862 if (ret) {
863 usb_unanchor_urb(urb);
864 goto err_submit;
865 }
866
867 /*
868 * Drop reference count.
869 * This ensures that the URB is freed when killing them.
870 */
871 usb_free_urb(urb);
872 }
873
874 return 0;
875
876 err_submit:
877 kfree_skb(skb);
878 err_skb:
879 usb_free_urb(urb);
880 err_urb:
881 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
882 return ret;
883 }
884
885 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev)
886 {
887 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted);
888 }
889
890 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev)
891 {
892 struct urb *urb = NULL;
893 struct sk_buff *skb = NULL;
894 int i, ret;
895
896 init_usb_anchor(&hif_dev->reg_in_submitted);
897
898 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) {
899
900 /* Allocate URB */
901 urb = usb_alloc_urb(0, GFP_KERNEL);
902 if (urb == NULL) {
903 ret = -ENOMEM;
904 goto err_urb;
905 }
906
907 /* Allocate buffer */
908 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL);
909 if (!skb) {
910 ret = -ENOMEM;
911 goto err_skb;
912 }
913
914 usb_fill_int_urb(urb, hif_dev->udev,
915 usb_rcvintpipe(hif_dev->udev,
916 USB_REG_IN_PIPE),
917 skb->data, MAX_REG_IN_BUF_SIZE,
918 ath9k_hif_usb_reg_in_cb, skb, 1);
919
920 /* Anchor URB */
921 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
922
923 /* Submit URB */
924 ret = usb_submit_urb(urb, GFP_KERNEL);
925 if (ret) {
926 usb_unanchor_urb(urb);
927 goto err_submit;
928 }
929
930 /*
931 * Drop reference count.
932 * This ensures that the URB is freed when killing them.
933 */
934 usb_free_urb(urb);
935 }
936
937 return 0;
938
939 err_submit:
940 kfree_skb(skb);
941 err_skb:
942 usb_free_urb(urb);
943 err_urb:
944 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
945 return ret;
946 }
947
948 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev)
949 {
950 /* Register Write */
951 init_usb_anchor(&hif_dev->regout_submitted);
952
953 /* TX */
954 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0)
955 goto err;
956
957 /* RX */
958 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0)
959 goto err_rx;
960
961 /* Register Read */
962 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0)
963 goto err_reg;
964
965 return 0;
966 err_reg:
967 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
968 err_rx:
969 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
970 err:
971 return -ENOMEM;
972 }
973
974 static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev)
975 {
976 usb_kill_anchored_urbs(&hif_dev->regout_submitted);
977 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
978 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
979 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
980 }
981
982 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev)
983 {
984 int transfer, err;
985 const void *data = hif_dev->fw_data;
986 size_t len = hif_dev->fw_size;
987 u32 addr = AR9271_FIRMWARE;
988 u8 *buf = kzalloc(4096, GFP_KERNEL);
989 u32 firm_offset;
990
991 if (!buf)
992 return -ENOMEM;
993
994 while (len) {
995 transfer = min_t(size_t, len, 4096);
996 memcpy(buf, data, transfer);
997
998 err = usb_control_msg(hif_dev->udev,
999 usb_sndctrlpipe(hif_dev->udev, 0),
1000 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT,
1001 addr >> 8, 0, buf, transfer,
1002 USB_MSG_TIMEOUT);
1003 if (err < 0) {
1004 kfree(buf);
1005 return err;
1006 }
1007
1008 len -= transfer;
1009 data += transfer;
1010 addr += transfer;
1011 }
1012 kfree(buf);
1013
1014 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1015 firm_offset = AR7010_FIRMWARE_TEXT;
1016 else
1017 firm_offset = AR9271_FIRMWARE_TEXT;
1018
1019 /*
1020 * Issue FW download complete command to firmware.
1021 */
1022 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0),
1023 FIRMWARE_DOWNLOAD_COMP,
1024 0x40 | USB_DIR_OUT,
1025 firm_offset >> 8, 0, NULL, 0, USB_MSG_TIMEOUT);
1026 if (err)
1027 return -EIO;
1028
1029 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n",
1030 hif_dev->fw_name, (unsigned long) hif_dev->fw_size);
1031
1032 return 0;
1033 }
1034
1035 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev)
1036 {
1037 int ret;
1038
1039 ret = ath9k_hif_usb_download_fw(hif_dev);
1040 if (ret) {
1041 dev_err(&hif_dev->udev->dev,
1042 "ath9k_htc: Firmware - %s download failed\n",
1043 hif_dev->fw_name);
1044 return ret;
1045 }
1046
1047 /* Alloc URBs */
1048 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1049 if (ret) {
1050 dev_err(&hif_dev->udev->dev,
1051 "ath9k_htc: Unable to allocate URBs\n");
1052 return ret;
1053 }
1054
1055 return 0;
1056 }
1057
1058 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev)
1059 {
1060 ath9k_hif_usb_dealloc_urbs(hif_dev);
1061 }
1062
1063 /*
1064 * If initialization fails or the FW cannot be retrieved,
1065 * detach the device.
1066 */
1067 static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev)
1068 {
1069 struct device *dev = &hif_dev->udev->dev;
1070 struct device *parent = dev->parent;
1071
1072 complete_all(&hif_dev->fw_done);
1073
1074 if (parent)
1075 device_lock(parent);
1076
1077 device_release_driver(dev);
1078
1079 if (parent)
1080 device_unlock(parent);
1081 }
1082
1083 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context);
1084
1085 /* taken from iwlwifi */
1086 static int ath9k_hif_request_firmware(struct hif_device_usb *hif_dev,
1087 bool first)
1088 {
1089 char index[8], *chip;
1090 int ret;
1091
1092 if (first) {
1093 if (htc_use_dev_fw) {
1094 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX + 1;
1095 sprintf(index, "%s", "dev");
1096 } else {
1097 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX;
1098 sprintf(index, "%d", hif_dev->fw_minor_index);
1099 }
1100 } else {
1101 hif_dev->fw_minor_index--;
1102 sprintf(index, "%d", hif_dev->fw_minor_index);
1103 }
1104
1105 /* test for FW 1.3 */
1106 if (MAJOR_VERSION_REQ == 1 && hif_dev->fw_minor_index == 3) {
1107 const char *filename;
1108
1109 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1110 filename = FIRMWARE_AR7010_1_1;
1111 else
1112 filename = FIRMWARE_AR9271;
1113
1114 /* expected fw locations:
1115 * - htc_9271.fw (stable version 1.3, depricated)
1116 */
1117 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name),
1118 "%s", filename);
1119
1120 } else if (hif_dev->fw_minor_index < FIRMWARE_MINOR_IDX_MIN) {
1121 dev_err(&hif_dev->udev->dev, "no suitable firmware found!\n");
1122
1123 return -ENOENT;
1124 } else {
1125 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1126 chip = "7010";
1127 else
1128 chip = "9271";
1129
1130 /* expected fw locations:
1131 * - ath9k_htc/htc_9271-1.dev.0.fw (development version)
1132 * - ath9k_htc/htc_9271-1.4.0.fw (stable version)
1133 */
1134 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name),
1135 "%s/htc_%s-%d.%s.0.fw", HTC_FW_PATH,
1136 chip, MAJOR_VERSION_REQ, index);
1137 }
1138
1139 ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name,
1140 &hif_dev->udev->dev, GFP_KERNEL,
1141 hif_dev, ath9k_hif_usb_firmware_cb);
1142 if (ret) {
1143 dev_err(&hif_dev->udev->dev,
1144 "ath9k_htc: Async request for firmware %s failed\n",
1145 hif_dev->fw_name);
1146 return ret;
1147 }
1148
1149 dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n",
1150 hif_dev->fw_name);
1151
1152 return ret;
1153 }
1154
1155 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context)
1156 {
1157 struct hif_device_usb *hif_dev = context;
1158 int ret;
1159
1160 if (!fw) {
1161 ret = ath9k_hif_request_firmware(hif_dev, false);
1162 if (!ret)
1163 return;
1164
1165 dev_err(&hif_dev->udev->dev,
1166 "ath9k_htc: Failed to get firmware %s\n",
1167 hif_dev->fw_name);
1168 goto err_fw;
1169 }
1170
1171 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb,
1172 &hif_dev->udev->dev);
1173 if (hif_dev->htc_handle == NULL)
1174 goto err_dev_alloc;
1175
1176 hif_dev->fw_data = fw->data;
1177 hif_dev->fw_size = fw->size;
1178
1179 /* Proceed with initialization */
1180
1181 ret = ath9k_hif_usb_dev_init(hif_dev);
1182 if (ret)
1183 goto err_dev_init;
1184
1185 ret = ath9k_htc_hw_init(hif_dev->htc_handle,
1186 &hif_dev->interface->dev,
1187 hif_dev->usb_device_id->idProduct,
1188 hif_dev->udev->product,
1189 hif_dev->usb_device_id->driver_info);
1190 if (ret) {
1191 ret = -EINVAL;
1192 goto err_htc_hw_init;
1193 }
1194
1195 release_firmware(fw);
1196 hif_dev->flags |= HIF_USB_READY;
1197 complete_all(&hif_dev->fw_done);
1198
1199 return;
1200
1201 err_htc_hw_init:
1202 ath9k_hif_usb_dev_deinit(hif_dev);
1203 err_dev_init:
1204 ath9k_htc_hw_free(hif_dev->htc_handle);
1205 err_dev_alloc:
1206 release_firmware(fw);
1207 err_fw:
1208 ath9k_hif_usb_firmware_fail(hif_dev);
1209 }
1210
1211 /*
1212 * An exact copy of the function from zd1211rw.
1213 */
1214 static int send_eject_command(struct usb_interface *interface)
1215 {
1216 struct usb_device *udev = interface_to_usbdev(interface);
1217 struct usb_host_interface *iface_desc = &interface->altsetting[0];
1218 struct usb_endpoint_descriptor *endpoint;
1219 unsigned char *cmd;
1220 u8 bulk_out_ep;
1221 int r;
1222
1223 if (iface_desc->desc.bNumEndpoints < 2)
1224 return -ENODEV;
1225
1226 /* Find bulk out endpoint */
1227 for (r = 1; r >= 0; r--) {
1228 endpoint = &iface_desc->endpoint[r].desc;
1229 if (usb_endpoint_dir_out(endpoint) &&
1230 usb_endpoint_xfer_bulk(endpoint)) {
1231 bulk_out_ep = endpoint->bEndpointAddress;
1232 break;
1233 }
1234 }
1235 if (r == -1) {
1236 dev_err(&udev->dev,
1237 "ath9k_htc: Could not find bulk out endpoint\n");
1238 return -ENODEV;
1239 }
1240
1241 cmd = kzalloc(31, GFP_KERNEL);
1242 if (cmd == NULL)
1243 return -ENODEV;
1244
1245 /* USB bulk command block */
1246 cmd[0] = 0x55; /* bulk command signature */
1247 cmd[1] = 0x53; /* bulk command signature */
1248 cmd[2] = 0x42; /* bulk command signature */
1249 cmd[3] = 0x43; /* bulk command signature */
1250 cmd[14] = 6; /* command length */
1251
1252 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
1253 cmd[19] = 0x2; /* eject disc */
1254
1255 dev_info(&udev->dev, "Ejecting storage device...\n");
1256 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
1257 cmd, 31, NULL, 2 * USB_MSG_TIMEOUT);
1258 kfree(cmd);
1259 if (r)
1260 return r;
1261
1262 /* At this point, the device disconnects and reconnects with the real
1263 * ID numbers. */
1264
1265 usb_set_intfdata(interface, NULL);
1266 return 0;
1267 }
1268
1269 static int ath9k_hif_usb_probe(struct usb_interface *interface,
1270 const struct usb_device_id *id)
1271 {
1272 struct usb_device *udev = interface_to_usbdev(interface);
1273 struct hif_device_usb *hif_dev;
1274 int ret = 0;
1275
1276 if (id->driver_info == STORAGE_DEVICE)
1277 return send_eject_command(interface);
1278
1279 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL);
1280 if (!hif_dev) {
1281 ret = -ENOMEM;
1282 goto err_alloc;
1283 }
1284
1285 usb_get_dev(udev);
1286
1287 hif_dev->udev = udev;
1288 hif_dev->interface = interface;
1289 hif_dev->usb_device_id = id;
1290 #ifdef CONFIG_PM
1291 udev->reset_resume = 1;
1292 #endif
1293 usb_set_intfdata(interface, hif_dev);
1294
1295 init_completion(&hif_dev->fw_done);
1296
1297 ret = ath9k_hif_request_firmware(hif_dev, true);
1298 if (ret)
1299 goto err_fw_req;
1300
1301 return ret;
1302
1303 err_fw_req:
1304 usb_set_intfdata(interface, NULL);
1305 kfree(hif_dev);
1306 usb_put_dev(udev);
1307 err_alloc:
1308 return ret;
1309 }
1310
1311 static void ath9k_hif_usb_reboot(struct usb_device *udev)
1312 {
1313 u32 reboot_cmd = 0xffffffff;
1314 void *buf;
1315 int ret;
1316
1317 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL);
1318 if (!buf)
1319 return;
1320
1321 ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE),
1322 buf, 4, NULL, USB_MSG_TIMEOUT);
1323 if (ret)
1324 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
1325
1326 kfree(buf);
1327 }
1328
1329 static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
1330 {
1331 struct usb_device *udev = interface_to_usbdev(interface);
1332 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1333 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false;
1334
1335 if (!hif_dev)
1336 return;
1337
1338 wait_for_completion(&hif_dev->fw_done);
1339
1340 if (hif_dev->flags & HIF_USB_READY) {
1341 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged);
1342 ath9k_htc_hw_free(hif_dev->htc_handle);
1343 ath9k_hif_usb_dev_deinit(hif_dev);
1344 }
1345
1346 usb_set_intfdata(interface, NULL);
1347
1348 /* If firmware was loaded we should drop it
1349 * go back to first stage bootloader. */
1350 if (!unplugged && (hif_dev->flags & HIF_USB_READY))
1351 ath9k_hif_usb_reboot(udev);
1352
1353 kfree(hif_dev);
1354 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");
1355 usb_put_dev(udev);
1356 }
1357
1358 #ifdef CONFIG_PM
1359 static int ath9k_hif_usb_suspend(struct usb_interface *interface,
1360 pm_message_t message)
1361 {
1362 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1363
1364 /*
1365 * The device has to be set to FULLSLEEP mode in case no
1366 * interface is up.
1367 */
1368 if (!(hif_dev->flags & HIF_USB_START))
1369 ath9k_htc_suspend(hif_dev->htc_handle);
1370
1371 wait_for_completion(&hif_dev->fw_done);
1372
1373 if (hif_dev->flags & HIF_USB_READY)
1374 ath9k_hif_usb_dealloc_urbs(hif_dev);
1375
1376 return 0;
1377 }
1378
1379 static int ath9k_hif_usb_resume(struct usb_interface *interface)
1380 {
1381 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1382 struct htc_target *htc_handle = hif_dev->htc_handle;
1383 int ret;
1384 const struct firmware *fw;
1385
1386 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1387 if (ret)
1388 return ret;
1389
1390 if (hif_dev->flags & HIF_USB_READY) {
1391 /* request cached firmware during suspend/resume cycle */
1392 ret = request_firmware(&fw, hif_dev->fw_name,
1393 &hif_dev->udev->dev);
1394 if (ret)
1395 goto fail_resume;
1396
1397 hif_dev->fw_data = fw->data;
1398 hif_dev->fw_size = fw->size;
1399 ret = ath9k_hif_usb_download_fw(hif_dev);
1400 release_firmware(fw);
1401 if (ret)
1402 goto fail_resume;
1403 } else {
1404 ath9k_hif_usb_dealloc_urbs(hif_dev);
1405 return -EIO;
1406 }
1407
1408 mdelay(100);
1409
1410 ret = ath9k_htc_resume(htc_handle);
1411
1412 if (ret)
1413 goto fail_resume;
1414
1415 return 0;
1416
1417 fail_resume:
1418 ath9k_hif_usb_dealloc_urbs(hif_dev);
1419
1420 return ret;
1421 }
1422 #endif
1423
1424 static struct usb_driver ath9k_hif_usb_driver = {
1425 .name = KBUILD_MODNAME,
1426 .probe = ath9k_hif_usb_probe,
1427 .disconnect = ath9k_hif_usb_disconnect,
1428 #ifdef CONFIG_PM
1429 .suspend = ath9k_hif_usb_suspend,
1430 .resume = ath9k_hif_usb_resume,
1431 .reset_resume = ath9k_hif_usb_resume,
1432 #endif
1433 .id_table = ath9k_hif_usb_ids,
1434 .soft_unbind = 1,
1435 .disable_hub_initiated_lpm = 1,
1436 };
1437
1438 int ath9k_hif_usb_init(void)
1439 {
1440 return usb_register(&ath9k_hif_usb_driver);
1441 }
1442
1443 void ath9k_hif_usb_exit(void)
1444 {
1445 usb_deregister(&ath9k_hif_usb_driver);
1446 }
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