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accel/ivpu: Move recovery work to system_unbound_wq
[drm/drm-misc.git] / drivers / net / wireless / ath / ath9k / hif_usb.c
blob7265766cddbdebbac8880e01b440d4c08c8b2132
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 <linux/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(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
46 { USB_DEVICE(0x0cf3, 0x7010),
47 .driver_info = AR9280_USB }, /* Atheros */
48 { USB_DEVICE(0x0846, 0x9018),
49 .driver_info = AR9280_USB }, /* Netgear WNDA3200 */
50 { USB_DEVICE(0x083A, 0xA704),
51 .driver_info = AR9280_USB }, /* SMC Networks */
52 { USB_DEVICE(0x0411, 0x017f),
53 .driver_info = AR9280_USB }, /* Sony UWA-BR100 */
54 { USB_DEVICE(0x0411, 0x0197),
55 .driver_info = AR9280_USB }, /* Buffalo WLI-UV-AG300P */
56 { USB_DEVICE(0x04da, 0x3904),
57 .driver_info = AR9280_USB },
58 { USB_DEVICE(0x0930, 0x0a08),
59 .driver_info = AR9280_USB }, /* Toshiba WLM-20U2 and GN-1080 */
60
61 { USB_DEVICE(0x0cf3, 0x20ff),
62 .driver_info = STORAGE_DEVICE },
63
64 { },
65 };
66
67 MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids);
68
69 static int __hif_usb_tx(struct hif_device_usb *hif_dev);
70
71 static void hif_usb_regout_cb(struct urb *urb)
72 {
73 struct cmd_buf *cmd = urb->context;
74
75 switch (urb->status) {
76 case 0:
77 break;
78 case -ENOENT:
79 case -ECONNRESET:
80 case -ENODEV:
81 case -ESHUTDOWN:
82 goto free;
83 default:
84 break;
85 }
86
87 if (cmd) {
88 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
89 cmd->skb, true);
90 kfree(cmd);
91 }
92
93 return;
94 free:
95 kfree_skb(cmd->skb);
96 kfree(cmd);
97 }
98
99 static int hif_usb_send_regout(struct hif_device_usb *hif_dev,
100 struct sk_buff *skb)
101 {
102 struct urb *urb;
103 struct cmd_buf *cmd;
104 int ret = 0;
105
106 urb = usb_alloc_urb(0, GFP_KERNEL);
107 if (urb == NULL)
108 return -ENOMEM;
109
110 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
111 if (cmd == NULL) {
112 usb_free_urb(urb);
113 return -ENOMEM;
114 }
115
116 cmd->skb = skb;
117 cmd->hif_dev = hif_dev;
118
119 usb_fill_int_urb(urb, hif_dev->udev,
120 usb_sndintpipe(hif_dev->udev, USB_REG_OUT_PIPE),
121 skb->data, skb->len,
122 hif_usb_regout_cb, cmd, 1);
123
124 usb_anchor_urb(urb, &hif_dev->regout_submitted);
125 ret = usb_submit_urb(urb, GFP_KERNEL);
126 if (ret) {
127 usb_unanchor_urb(urb);
128 kfree(cmd);
129 }
130 usb_free_urb(urb);
131
132 return ret;
133 }
134
135 static void hif_usb_mgmt_cb(struct urb *urb)
136 {
137 struct cmd_buf *cmd = urb->context;
138 struct hif_device_usb *hif_dev;
139 unsigned long flags;
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_irqsave(&hif_dev->tx.tx_lock, flags);
161 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) {
162 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
163 dev_kfree_skb_any(cmd->skb);
164 kfree(cmd);
165 return;
166 }
167 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
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(hif_dev, skb_success);
246 TX_STAT_ADD(hif_dev, skb_success_bytes, ln);
247 }
248 else
249 TX_STAT_INC(hif_dev, skb_failed);
250 }
251 }
252
253 static void hif_usb_tx_cb(struct urb *urb)
254 {
255 struct tx_buf *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(hif_dev, 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(hif_dev, 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 } else {
370 TX_STAT_INC(hif_dev, buf_queued);
371 }
372
373 return ret;
374 }
375
376 static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb)
377 {
378 struct ath9k_htc_tx_ctl *tx_ctl;
379 unsigned long flags;
380 int ret = 0;
381
382 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
383
384 if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
385 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
386 return -ENODEV;
387 }
388
389 /* Check if the max queue count has been reached */
390 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) {
391 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
392 return -ENOMEM;
393 }
394
395 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
396
397 tx_ctl = HTC_SKB_CB(skb);
398
399 /* Mgmt/Beacon frames don't use the TX buffer pool */
400 if ((tx_ctl->type == ATH9K_HTC_MGMT) ||
401 (tx_ctl->type == ATH9K_HTC_BEACON)) {
402 ret = hif_usb_send_mgmt(hif_dev, skb);
403 }
404
405 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
406
407 if ((tx_ctl->type == ATH9K_HTC_NORMAL) ||
408 (tx_ctl->type == ATH9K_HTC_AMPDU)) {
409 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb);
410 hif_dev->tx.tx_skb_cnt++;
411 }
412
413 /* Check if AMPDUs have to be sent immediately */
414 if ((hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) &&
415 (hif_dev->tx.tx_skb_cnt < 2)) {
416 __hif_usb_tx(hif_dev);
417 }
418
419 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
420
421 return ret;
422 }
423
424 static void hif_usb_start(void *hif_handle)
425 {
426 struct hif_device_usb *hif_dev = hif_handle;
427 unsigned long flags;
428
429 hif_dev->flags |= HIF_USB_START;
430
431 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
432 hif_dev->tx.flags &= ~HIF_USB_TX_STOP;
433 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
434 }
435
436 static void hif_usb_stop(void *hif_handle)
437 {
438 struct hif_device_usb *hif_dev = hif_handle;
439 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
440 unsigned long flags;
441
442 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
443 ath9k_skb_queue_complete(hif_dev, &hif_dev->tx.tx_skb_queue, false);
444 hif_dev->tx.tx_skb_cnt = 0;
445 hif_dev->tx.flags |= HIF_USB_TX_STOP;
446 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
447
448 /* The pending URBs have to be canceled. */
449 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
450 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
451 &hif_dev->tx.tx_pending, list) {
452 usb_get_urb(tx_buf->urb);
453 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
454 usb_kill_urb(tx_buf->urb);
455 list_del(&tx_buf->list);
456 usb_free_urb(tx_buf->urb);
457 kfree(tx_buf->buf);
458 kfree(tx_buf);
459 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
460 }
461 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
462
463 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
464 }
465
466 static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb)
467 {
468 struct hif_device_usb *hif_dev = hif_handle;
469 int ret = 0;
470
471 switch (pipe_id) {
472 case USB_WLAN_TX_PIPE:
473 ret = hif_usb_send_tx(hif_dev, skb);
474 break;
475 case USB_REG_OUT_PIPE:
476 ret = hif_usb_send_regout(hif_dev, skb);
477 break;
478 default:
479 dev_err(&hif_dev->udev->dev,
480 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id);
481 ret = -EINVAL;
482 break;
483 }
484
485 return ret;
486 }
487
488 static inline bool check_index(struct sk_buff *skb, u8 idx)
489 {
490 struct ath9k_htc_tx_ctl *tx_ctl;
491
492 tx_ctl = HTC_SKB_CB(skb);
493
494 if ((tx_ctl->type == ATH9K_HTC_AMPDU) &&
495 (tx_ctl->sta_idx == idx))
496 return true;
497
498 return false;
499 }
500
501 static void hif_usb_sta_drain(void *hif_handle, u8 idx)
502 {
503 struct hif_device_usb *hif_dev = hif_handle;
504 struct sk_buff *skb, *tmp;
505 unsigned long flags;
506
507 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
508
509 skb_queue_walk_safe(&hif_dev->tx.tx_skb_queue, skb, tmp) {
510 if (check_index(skb, idx)) {
511 __skb_unlink(skb, &hif_dev->tx.tx_skb_queue);
512 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
513 skb, false);
514 hif_dev->tx.tx_skb_cnt--;
515 TX_STAT_INC(hif_dev, skb_failed);
516 }
517 }
518
519 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
520 }
521
522 static struct ath9k_htc_hif hif_usb = {
523 .transport = ATH9K_HIF_USB,
524 .name = "ath9k_hif_usb",
525
526 .control_ul_pipe = USB_REG_OUT_PIPE,
527 .control_dl_pipe = USB_REG_IN_PIPE,
528
529 .start = hif_usb_start,
530 .stop = hif_usb_stop,
531 .sta_drain = hif_usb_sta_drain,
532 .send = hif_usb_send,
533 };
534
535 /* Need to free remain_skb allocated in ath9k_hif_usb_rx_stream
536 * in case ath9k_hif_usb_rx_stream wasn't called next time to
537 * process the buffer and subsequently free it.
538 */
539 static void ath9k_hif_usb_free_rx_remain_skb(struct hif_device_usb *hif_dev)
540 {
541 unsigned long flags;
542
543 spin_lock_irqsave(&hif_dev->rx_lock, flags);
544 if (hif_dev->remain_skb) {
545 dev_kfree_skb_any(hif_dev->remain_skb);
546 hif_dev->remain_skb = NULL;
547 hif_dev->rx_remain_len = 0;
548 RX_STAT_INC(hif_dev, skb_dropped);
549 }
550 spin_unlock_irqrestore(&hif_dev->rx_lock, flags);
551 }
552
553 static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev,
554 struct sk_buff *skb)
555 {
556 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER];
557 int index = 0, i, len = skb->len;
558 int rx_remain_len, rx_pkt_len;
559 u16 pool_index = 0;
560 u8 *ptr;
561
562 spin_lock(&hif_dev->rx_lock);
563
564 rx_remain_len = hif_dev->rx_remain_len;
565 rx_pkt_len = hif_dev->rx_transfer_len;
566
567 if (rx_remain_len != 0) {
568 struct sk_buff *remain_skb = hif_dev->remain_skb;
569
570 if (remain_skb) {
571 ptr = (u8 *) remain_skb->data;
572
573 index = rx_remain_len;
574 rx_remain_len -= hif_dev->rx_pad_len;
575 ptr += rx_pkt_len;
576
577 memcpy(ptr, skb->data, rx_remain_len);
578
579 rx_pkt_len += rx_remain_len;
580 skb_put(remain_skb, rx_pkt_len);
581
582 skb_pool[pool_index++] = remain_skb;
583 hif_dev->remain_skb = NULL;
584 hif_dev->rx_remain_len = 0;
585 } else {
586 index = rx_remain_len;
587 }
588 }
589
590 spin_unlock(&hif_dev->rx_lock);
591
592 while (index < len) {
593 u16 pkt_len;
594 u16 pkt_tag;
595 u16 pad_len;
596 int chk_idx;
597
598 ptr = (u8 *) skb->data;
599
600 pkt_len = get_unaligned_le16(ptr + index);
601 pkt_tag = get_unaligned_le16(ptr + index + 2);
602
603 /* It is supposed that if we have an invalid pkt_tag or
604 * pkt_len then the whole input SKB is considered invalid
605 * and dropped; the associated packets already in skb_pool
606 * are dropped, too.
607 */
608 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) {
609 RX_STAT_INC(hif_dev, skb_dropped);
610 goto invalid_pkt;
611 }
612
613 if (pkt_len > 2 * MAX_RX_BUF_SIZE) {
614 dev_err(&hif_dev->udev->dev,
615 "ath9k_htc: invalid pkt_len (%x)\n", pkt_len);
616 RX_STAT_INC(hif_dev, skb_dropped);
617 goto invalid_pkt;
618 }
619
620 pad_len = 4 - (pkt_len & 0x3);
621 if (pad_len == 4)
622 pad_len = 0;
623
624 chk_idx = index;
625 index = index + 4 + pkt_len + pad_len;
626
627 if (index > MAX_RX_BUF_SIZE) {
628 spin_lock(&hif_dev->rx_lock);
629 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
630 if (!nskb) {
631 dev_err(&hif_dev->udev->dev,
632 "ath9k_htc: RX memory allocation error\n");
633 spin_unlock(&hif_dev->rx_lock);
634 goto err;
635 }
636
637 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE;
638 hif_dev->rx_transfer_len =
639 MAX_RX_BUF_SIZE - chk_idx - 4;
640 hif_dev->rx_pad_len = pad_len;
641
642 skb_reserve(nskb, 32);
643 RX_STAT_INC(hif_dev, skb_allocated);
644
645 memcpy(nskb->data, &(skb->data[chk_idx+4]),
646 hif_dev->rx_transfer_len);
647
648 /* Record the buffer pointer */
649 hif_dev->remain_skb = nskb;
650 spin_unlock(&hif_dev->rx_lock);
651 } else {
652 if (pool_index == MAX_PKT_NUM_IN_TRANSFER) {
653 dev_err(&hif_dev->udev->dev,
654 "ath9k_htc: over RX MAX_PKT_NUM\n");
655 goto err;
656 }
657 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
658 if (!nskb) {
659 dev_err(&hif_dev->udev->dev,
660 "ath9k_htc: RX memory allocation error\n");
661 goto err;
662 }
663 skb_reserve(nskb, 32);
664 RX_STAT_INC(hif_dev, skb_allocated);
665
666 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len);
667 skb_put(nskb, pkt_len);
668 skb_pool[pool_index++] = nskb;
669 }
670 }
671
672 err:
673 for (i = 0; i < pool_index; i++) {
674 RX_STAT_ADD(hif_dev, skb_completed_bytes, skb_pool[i]->len);
675 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i],
676 skb_pool[i]->len, USB_WLAN_RX_PIPE);
677 RX_STAT_INC(hif_dev, skb_completed);
678 }
679 return;
680 invalid_pkt:
681 for (i = 0; i < pool_index; i++) {
682 dev_kfree_skb_any(skb_pool[i]);
683 RX_STAT_INC(hif_dev, skb_dropped);
684 }
685 return;
686 }
687
688 static void ath9k_hif_usb_rx_cb(struct urb *urb)
689 {
690 struct rx_buf *rx_buf = urb->context;
691 struct hif_device_usb *hif_dev = rx_buf->hif_dev;
692 struct sk_buff *skb = rx_buf->skb;
693 int ret;
694
695 if (!skb)
696 return;
697
698 if (!hif_dev)
699 goto free;
700
701 switch (urb->status) {
702 case 0:
703 break;
704 case -ENOENT:
705 case -ECONNRESET:
706 case -ENODEV:
707 case -ESHUTDOWN:
708 goto free;
709 default:
710 goto resubmit;
711 }
712
713 if (likely(urb->actual_length != 0)) {
714 skb_put(skb, urb->actual_length);
715 ath9k_hif_usb_rx_stream(hif_dev, skb);
716 }
717
718 resubmit:
719 __skb_set_length(skb, 0);
720
721 usb_anchor_urb(urb, &hif_dev->rx_submitted);
722 ret = usb_submit_urb(urb, GFP_ATOMIC);
723 if (ret) {
724 usb_unanchor_urb(urb);
725 goto free;
726 }
727
728 return;
729 free:
730 kfree_skb(skb);
731 kfree(rx_buf);
732 }
733
734 static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
735 {
736 struct rx_buf *rx_buf = urb->context;
737 struct hif_device_usb *hif_dev = rx_buf->hif_dev;
738 struct sk_buff *skb = rx_buf->skb;
739 int ret;
740
741 if (!skb)
742 return;
743
744 if (!hif_dev)
745 goto free_skb;
746
747 switch (urb->status) {
748 case 0:
749 break;
750 case -ENOENT:
751 case -ECONNRESET:
752 case -ENODEV:
753 case -ESHUTDOWN:
754 goto free_skb;
755 default:
756 __skb_set_length(skb, 0);
757
758 goto resubmit;
759 }
760
761 if (likely(urb->actual_length != 0)) {
762 skb_put(skb, urb->actual_length);
763
764 /*
765 * Process the command first.
766 * skb is either freed here or passed to be
767 * managed to another callback function.
768 */
769 ath9k_htc_rx_msg(hif_dev->htc_handle, skb,
770 skb->len, USB_REG_IN_PIPE);
771
772 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC);
773 if (!skb) {
774 dev_err(&hif_dev->udev->dev,
775 "ath9k_htc: REG_IN memory allocation failure\n");
776 goto free_rx_buf;
777 }
778
779 rx_buf->skb = skb;
780
781 usb_fill_int_urb(urb, hif_dev->udev,
782 usb_rcvintpipe(hif_dev->udev,
783 USB_REG_IN_PIPE),
784 skb->data, MAX_REG_IN_BUF_SIZE,
785 ath9k_hif_usb_reg_in_cb, rx_buf, 1);
786 }
787
788 resubmit:
789 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
790 ret = usb_submit_urb(urb, GFP_ATOMIC);
791 if (ret) {
792 usb_unanchor_urb(urb);
793 goto free_skb;
794 }
795
796 return;
797 free_skb:
798 kfree_skb(skb);
799 free_rx_buf:
800 kfree(rx_buf);
801 urb->context = NULL;
802 }
803
804 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
805 {
806 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
807 unsigned long flags;
808
809 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
810 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
811 &hif_dev->tx.tx_buf, list) {
812 list_del(&tx_buf->list);
813 usb_free_urb(tx_buf->urb);
814 kfree(tx_buf->buf);
815 kfree(tx_buf);
816 }
817 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
818
819 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
820 hif_dev->tx.flags |= HIF_USB_TX_FLUSH;
821 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
822
823 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
824 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
825 &hif_dev->tx.tx_pending, list) {
826 usb_get_urb(tx_buf->urb);
827 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
828 usb_kill_urb(tx_buf->urb);
829 list_del(&tx_buf->list);
830 usb_free_urb(tx_buf->urb);
831 kfree(tx_buf->buf);
832 kfree(tx_buf);
833 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
834 }
835 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
836
837 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
838 }
839
840 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev)
841 {
842 struct tx_buf *tx_buf;
843 int i;
844
845 INIT_LIST_HEAD(&hif_dev->tx.tx_buf);
846 INIT_LIST_HEAD(&hif_dev->tx.tx_pending);
847 spin_lock_init(&hif_dev->tx.tx_lock);
848 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue);
849 init_usb_anchor(&hif_dev->mgmt_submitted);
850
851 for (i = 0; i < MAX_TX_URB_NUM; i++) {
852 tx_buf = kzalloc(sizeof(*tx_buf), GFP_KERNEL);
853 if (!tx_buf)
854 goto err;
855
856 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL);
857 if (!tx_buf->buf)
858 goto err;
859
860 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL);
861 if (!tx_buf->urb)
862 goto err;
863
864 tx_buf->hif_dev = hif_dev;
865 __skb_queue_head_init(&tx_buf->skb_queue);
866
867 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
868 }
869
870 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM;
871
872 return 0;
873 err:
874 if (tx_buf) {
875 kfree(tx_buf->buf);
876 kfree(tx_buf);
877 }
878 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
879 return -ENOMEM;
880 }
881
882 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev)
883 {
884 usb_kill_anchored_urbs(&hif_dev->rx_submitted);
885 ath9k_hif_usb_free_rx_remain_skb(hif_dev);
886 }
887
888 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
889 {
890 struct rx_buf *rx_buf = NULL;
891 struct sk_buff *skb = NULL;
892 struct urb *urb = NULL;
893 int i, ret;
894
895 init_usb_anchor(&hif_dev->rx_submitted);
896 spin_lock_init(&hif_dev->rx_lock);
897
898 for (i = 0; i < MAX_RX_URB_NUM; i++) {
899
900 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL);
901 if (!rx_buf) {
902 ret = -ENOMEM;
903 goto err_rxb;
904 }
905
906 /* Allocate URB */
907 urb = usb_alloc_urb(0, GFP_KERNEL);
908 if (urb == NULL) {
909 ret = -ENOMEM;
910 goto err_urb;
911 }
912
913 /* Allocate buffer */
914 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL);
915 if (!skb) {
916 ret = -ENOMEM;
917 goto err_skb;
918 }
919
920 rx_buf->hif_dev = hif_dev;
921 rx_buf->skb = skb;
922
923 usb_fill_bulk_urb(urb, hif_dev->udev,
924 usb_rcvbulkpipe(hif_dev->udev,
925 USB_WLAN_RX_PIPE),
926 skb->data, MAX_RX_BUF_SIZE,
927 ath9k_hif_usb_rx_cb, rx_buf);
928
929 /* Anchor URB */
930 usb_anchor_urb(urb, &hif_dev->rx_submitted);
931
932 /* Submit URB */
933 ret = usb_submit_urb(urb, GFP_KERNEL);
934 if (ret) {
935 usb_unanchor_urb(urb);
936 goto err_submit;
937 }
938
939 /*
940 * Drop reference count.
941 * This ensures that the URB is freed when killing them.
942 */
943 usb_free_urb(urb);
944 }
945
946 return 0;
947
948 err_submit:
949 kfree_skb(skb);
950 err_skb:
951 usb_free_urb(urb);
952 err_urb:
953 kfree(rx_buf);
954 err_rxb:
955 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
956 return ret;
957 }
958
959 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev)
960 {
961 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted);
962 }
963
964 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev)
965 {
966 struct rx_buf *rx_buf = NULL;
967 struct sk_buff *skb = NULL;
968 struct urb *urb = NULL;
969 int i, ret;
970
971 init_usb_anchor(&hif_dev->reg_in_submitted);
972
973 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) {
974
975 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL);
976 if (!rx_buf) {
977 ret = -ENOMEM;
978 goto err_rxb;
979 }
980
981 /* Allocate URB */
982 urb = usb_alloc_urb(0, GFP_KERNEL);
983 if (urb == NULL) {
984 ret = -ENOMEM;
985 goto err_urb;
986 }
987
988 /* Allocate buffer */
989 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL);
990 if (!skb) {
991 ret = -ENOMEM;
992 goto err_skb;
993 }
994
995 rx_buf->hif_dev = hif_dev;
996 rx_buf->skb = skb;
997
998 usb_fill_int_urb(urb, hif_dev->udev,
999 usb_rcvintpipe(hif_dev->udev,
1000 USB_REG_IN_PIPE),
1001 skb->data, MAX_REG_IN_BUF_SIZE,
1002 ath9k_hif_usb_reg_in_cb, rx_buf, 1);
1003
1004 /* Anchor URB */
1005 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
1006
1007 /* Submit URB */
1008 ret = usb_submit_urb(urb, GFP_KERNEL);
1009 if (ret) {
1010 usb_unanchor_urb(urb);
1011 goto err_submit;
1012 }
1013
1014 /*
1015 * Drop reference count.
1016 * This ensures that the URB is freed when killing them.
1017 */
1018 usb_free_urb(urb);
1019 }
1020
1021 return 0;
1022
1023 err_submit:
1024 kfree_skb(skb);
1025 err_skb:
1026 usb_free_urb(urb);
1027 err_urb:
1028 kfree(rx_buf);
1029 err_rxb:
1030 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
1031 return ret;
1032 }
1033
1034 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev)
1035 {
1036 /* Register Write */
1037 init_usb_anchor(&hif_dev->regout_submitted);
1038
1039 /* TX */
1040 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0)
1041 goto err;
1042
1043 /* RX */
1044 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0)
1045 goto err_rx;
1046
1047 /* Register Read */
1048 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0)
1049 goto err_reg;
1050
1051 return 0;
1052 err_reg:
1053 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
1054 err_rx:
1055 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
1056 err:
1057 return -ENOMEM;
1058 }
1059
1060 void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev)
1061 {
1062 usb_kill_anchored_urbs(&hif_dev->regout_submitted);
1063 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
1064 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
1065 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
1066 }
1067
1068 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev)
1069 {
1070 int transfer, err;
1071 const void *data = hif_dev->fw_data;
1072 size_t len = hif_dev->fw_size;
1073 u32 addr = AR9271_FIRMWARE;
1074 u8 *buf = kzalloc(4096, GFP_KERNEL);
1075 u32 firm_offset;
1076
1077 if (!buf)
1078 return -ENOMEM;
1079
1080 while (len) {
1081 transfer = min_t(size_t, len, 4096);
1082 memcpy(buf, data, transfer);
1083
1084 err = usb_control_msg(hif_dev->udev,
1085 usb_sndctrlpipe(hif_dev->udev, 0),
1086 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT,
1087 addr >> 8, 0, buf, transfer,
1088 USB_MSG_TIMEOUT);
1089 if (err < 0) {
1090 kfree(buf);
1091 return err;
1092 }
1093
1094 len -= transfer;
1095 data += transfer;
1096 addr += transfer;
1097 }
1098 kfree(buf);
1099
1100 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1101 firm_offset = AR7010_FIRMWARE_TEXT;
1102 else
1103 firm_offset = AR9271_FIRMWARE_TEXT;
1104
1105 /*
1106 * Issue FW download complete command to firmware.
1107 */
1108 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0),
1109 FIRMWARE_DOWNLOAD_COMP,
1110 0x40 | USB_DIR_OUT,
1111 firm_offset >> 8, 0, NULL, 0, USB_MSG_TIMEOUT);
1112 if (err)
1113 return -EIO;
1114
1115 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n",
1116 hif_dev->fw_name, (unsigned long) hif_dev->fw_size);
1117
1118 return 0;
1119 }
1120
1121 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev)
1122 {
1123 int ret;
1124
1125 ret = ath9k_hif_usb_download_fw(hif_dev);
1126 if (ret) {
1127 dev_err(&hif_dev->udev->dev,
1128 "ath9k_htc: Firmware - %s download failed\n",
1129 hif_dev->fw_name);
1130 return ret;
1131 }
1132
1133 /* Alloc URBs */
1134 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1135 if (ret) {
1136 dev_err(&hif_dev->udev->dev,
1137 "ath9k_htc: Unable to allocate URBs\n");
1138 return ret;
1139 }
1140
1141 return 0;
1142 }
1143
1144 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev)
1145 {
1146 ath9k_hif_usb_dealloc_urbs(hif_dev);
1147 }
1148
1149 /*
1150 * If initialization fails or the FW cannot be retrieved,
1151 * detach the device.
1152 */
1153 static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev)
1154 {
1155 struct device *dev = &hif_dev->udev->dev;
1156 struct device *parent = dev->parent;
1157
1158 complete_all(&hif_dev->fw_done);
1159
1160 if (parent)
1161 device_lock(parent);
1162
1163 device_release_driver(dev);
1164
1165 if (parent)
1166 device_unlock(parent);
1167 }
1168
1169 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context);
1170
1171 /* taken from iwlwifi */
1172 static int ath9k_hif_request_firmware(struct hif_device_usb *hif_dev,
1173 bool first)
1174 {
1175 char index[8], *chip;
1176 int ret;
1177
1178 if (first) {
1179 if (htc_use_dev_fw) {
1180 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX + 1;
1181 sprintf(index, "%s", "dev");
1182 } else {
1183 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX;
1184 sprintf(index, "%d", hif_dev->fw_minor_index);
1185 }
1186 } else {
1187 hif_dev->fw_minor_index--;
1188 sprintf(index, "%d", hif_dev->fw_minor_index);
1189 }
1190
1191 /* test for FW 1.3 */
1192 if (MAJOR_VERSION_REQ == 1 && hif_dev->fw_minor_index == 3) {
1193 const char *filename;
1194
1195 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1196 filename = FIRMWARE_AR7010_1_1;
1197 else
1198 filename = FIRMWARE_AR9271;
1199
1200 /* expected fw locations:
1201 * - htc_9271.fw (stable version 1.3, depricated)
1202 */
1203 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name),
1204 "%s", filename);
1205
1206 } else if (hif_dev->fw_minor_index < FIRMWARE_MINOR_IDX_MIN) {
1207 dev_err(&hif_dev->udev->dev, "no suitable firmware found!\n");
1208
1209 return -ENOENT;
1210 } else {
1211 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1212 chip = "7010";
1213 else
1214 chip = "9271";
1215
1216 /* expected fw locations:
1217 * - ath9k_htc/htc_9271-1.dev.0.fw (development version)
1218 * - ath9k_htc/htc_9271-1.4.0.fw (stable version)
1219 */
1220 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name),
1221 "%s/htc_%s-%d.%s.0.fw", HTC_FW_PATH,
1222 chip, MAJOR_VERSION_REQ, index);
1223 }
1224
1225 ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name,
1226 &hif_dev->udev->dev, GFP_KERNEL,
1227 hif_dev, ath9k_hif_usb_firmware_cb);
1228 if (ret) {
1229 dev_err(&hif_dev->udev->dev,
1230 "ath9k_htc: Async request for firmware %s failed\n",
1231 hif_dev->fw_name);
1232 return ret;
1233 }
1234
1235 dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n",
1236 hif_dev->fw_name);
1237
1238 return ret;
1239 }
1240
1241 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context)
1242 {
1243 struct hif_device_usb *hif_dev = context;
1244 int ret;
1245
1246 if (!fw) {
1247 ret = ath9k_hif_request_firmware(hif_dev, false);
1248 if (!ret)
1249 return;
1250
1251 dev_err(&hif_dev->udev->dev,
1252 "ath9k_htc: Failed to get firmware %s\n",
1253 hif_dev->fw_name);
1254 goto err_fw;
1255 }
1256
1257 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb,
1258 &hif_dev->udev->dev);
1259 if (hif_dev->htc_handle == NULL)
1260 goto err_dev_alloc;
1261
1262 hif_dev->fw_data = fw->data;
1263 hif_dev->fw_size = fw->size;
1264
1265 /* Proceed with initialization */
1266
1267 ret = ath9k_hif_usb_dev_init(hif_dev);
1268 if (ret)
1269 goto err_dev_init;
1270
1271 ret = ath9k_htc_hw_init(hif_dev->htc_handle,
1272 &hif_dev->interface->dev,
1273 hif_dev->usb_device_id->idProduct,
1274 hif_dev->udev->product,
1275 hif_dev->usb_device_id->driver_info);
1276 if (ret) {
1277 ret = -EINVAL;
1278 goto err_htc_hw_init;
1279 }
1280
1281 release_firmware(fw);
1282 hif_dev->flags |= HIF_USB_READY;
1283 complete_all(&hif_dev->fw_done);
1284
1285 return;
1286
1287 err_htc_hw_init:
1288 ath9k_hif_usb_dev_deinit(hif_dev);
1289 err_dev_init:
1290 ath9k_htc_hw_free(hif_dev->htc_handle);
1291 err_dev_alloc:
1292 release_firmware(fw);
1293 err_fw:
1294 ath9k_hif_usb_firmware_fail(hif_dev);
1295 }
1296
1297 /*
1298 * An exact copy of the function from zd1211rw.
1299 */
1300 static int send_eject_command(struct usb_interface *interface)
1301 {
1302 struct usb_device *udev = interface_to_usbdev(interface);
1303 struct usb_host_interface *iface_desc = interface->cur_altsetting;
1304 struct usb_endpoint_descriptor *endpoint;
1305 unsigned char *cmd;
1306 u8 bulk_out_ep;
1307 int r;
1308
1309 if (iface_desc->desc.bNumEndpoints < 2)
1310 return -ENODEV;
1311
1312 /* Find bulk out endpoint */
1313 for (r = 1; r >= 0; r--) {
1314 endpoint = &iface_desc->endpoint[r].desc;
1315 if (usb_endpoint_dir_out(endpoint) &&
1316 usb_endpoint_xfer_bulk(endpoint)) {
1317 bulk_out_ep = endpoint->bEndpointAddress;
1318 break;
1319 }
1320 }
1321 if (r == -1) {
1322 dev_err(&udev->dev,
1323 "ath9k_htc: Could not find bulk out endpoint\n");
1324 return -ENODEV;
1325 }
1326
1327 cmd = kzalloc(31, GFP_KERNEL);
1328 if (cmd == NULL)
1329 return -ENODEV;
1330
1331 /* USB bulk command block */
1332 cmd[0] = 0x55; /* bulk command signature */
1333 cmd[1] = 0x53; /* bulk command signature */
1334 cmd[2] = 0x42; /* bulk command signature */
1335 cmd[3] = 0x43; /* bulk command signature */
1336 cmd[14] = 6; /* command length */
1337
1338 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
1339 cmd[19] = 0x2; /* eject disc */
1340
1341 dev_info(&udev->dev, "Ejecting storage device...\n");
1342 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
1343 cmd, 31, NULL, 2 * USB_MSG_TIMEOUT);
1344 kfree(cmd);
1345 if (r)
1346 return r;
1347
1348 /* At this point, the device disconnects and reconnects with the real
1349 * ID numbers. */
1350
1351 usb_set_intfdata(interface, NULL);
1352 return 0;
1353 }
1354
1355 static int ath9k_hif_usb_probe(struct usb_interface *interface,
1356 const struct usb_device_id *id)
1357 {
1358 struct usb_endpoint_descriptor *bulk_in, *bulk_out, *int_in, *int_out;
1359 struct usb_device *udev = interface_to_usbdev(interface);
1360 struct usb_host_interface *alt;
1361 struct hif_device_usb *hif_dev;
1362 int ret = 0;
1363
1364 /* Verify the expected endpoints are present */
1365 alt = interface->cur_altsetting;
1366 if (usb_find_common_endpoints(alt, &bulk_in, &bulk_out, &int_in, &int_out) < 0 ||
1367 usb_endpoint_num(bulk_in) != USB_WLAN_RX_PIPE ||
1368 usb_endpoint_num(bulk_out) != USB_WLAN_TX_PIPE ||
1369 usb_endpoint_num(int_in) != USB_REG_IN_PIPE ||
1370 usb_endpoint_num(int_out) != USB_REG_OUT_PIPE) {
1371 dev_err(&udev->dev,
1372 "ath9k_htc: Device endpoint numbers are not the expected ones\n");
1373 return -ENODEV;
1374 }
1375
1376 if (id->driver_info == STORAGE_DEVICE)
1377 return send_eject_command(interface);
1378
1379 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL);
1380 if (!hif_dev) {
1381 ret = -ENOMEM;
1382 goto err_alloc;
1383 }
1384
1385 usb_get_dev(udev);
1386
1387 hif_dev->udev = udev;
1388 hif_dev->interface = interface;
1389 hif_dev->usb_device_id = id;
1390 #ifdef CONFIG_PM
1391 udev->reset_resume = 1;
1392 #endif
1393 usb_set_intfdata(interface, hif_dev);
1394
1395 init_completion(&hif_dev->fw_done);
1396
1397 ret = ath9k_hif_request_firmware(hif_dev, true);
1398 if (ret)
1399 goto err_fw_req;
1400
1401 return ret;
1402
1403 err_fw_req:
1404 usb_set_intfdata(interface, NULL);
1405 kfree(hif_dev);
1406 usb_put_dev(udev);
1407 err_alloc:
1408 return ret;
1409 }
1410
1411 static void ath9k_hif_usb_reboot(struct usb_device *udev)
1412 {
1413 u32 reboot_cmd = 0xffffffff;
1414 void *buf;
1415 int ret;
1416
1417 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL);
1418 if (!buf)
1419 return;
1420
1421 ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE),
1422 buf, 4, NULL, USB_MSG_TIMEOUT);
1423 if (ret)
1424 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
1425
1426 kfree(buf);
1427 }
1428
1429 static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
1430 {
1431 struct usb_device *udev = interface_to_usbdev(interface);
1432 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1433 bool unplugged = udev->state == USB_STATE_NOTATTACHED;
1434
1435 if (!hif_dev)
1436 return;
1437
1438 wait_for_completion(&hif_dev->fw_done);
1439
1440 if (hif_dev->flags & HIF_USB_READY) {
1441 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged);
1442 ath9k_htc_hw_free(hif_dev->htc_handle);
1443 }
1444
1445 usb_set_intfdata(interface, NULL);
1446
1447 /* If firmware was loaded we should drop it
1448 * go back to first stage bootloader. */
1449 if (!unplugged && (hif_dev->flags & HIF_USB_READY))
1450 ath9k_hif_usb_reboot(udev);
1451
1452 kfree(hif_dev);
1453 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");
1454 usb_put_dev(udev);
1455 }
1456
1457 #ifdef CONFIG_PM
1458 static int ath9k_hif_usb_suspend(struct usb_interface *interface,
1459 pm_message_t message)
1460 {
1461 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1462
1463 /*
1464 * The device has to be set to FULLSLEEP mode in case no
1465 * interface is up.
1466 */
1467 if (!(hif_dev->flags & HIF_USB_START))
1468 ath9k_htc_suspend(hif_dev->htc_handle);
1469
1470 wait_for_completion(&hif_dev->fw_done);
1471
1472 if (hif_dev->flags & HIF_USB_READY)
1473 ath9k_hif_usb_dealloc_urbs(hif_dev);
1474
1475 return 0;
1476 }
1477
1478 static int ath9k_hif_usb_resume(struct usb_interface *interface)
1479 {
1480 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1481 struct htc_target *htc_handle = hif_dev->htc_handle;
1482 const struct firmware *fw;
1483 int ret;
1484
1485 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1486 if (ret)
1487 return ret;
1488
1489 if (!(hif_dev->flags & HIF_USB_READY)) {
1490 ret = -EIO;
1491 goto fail_resume;
1492 }
1493
1494 /* request cached firmware during suspend/resume cycle */
1495 ret = request_firmware(&fw, hif_dev->fw_name,
1496 &hif_dev->udev->dev);
1497 if (ret)
1498 goto fail_resume;
1499
1500 hif_dev->fw_data = fw->data;
1501 hif_dev->fw_size = fw->size;
1502 ret = ath9k_hif_usb_download_fw(hif_dev);
1503 release_firmware(fw);
1504 if (ret)
1505 goto fail_resume;
1506
1507 mdelay(100);
1508
1509 ret = ath9k_htc_resume(htc_handle);
1510
1511 if (ret)
1512 goto fail_resume;
1513
1514 return 0;
1515
1516 fail_resume:
1517 ath9k_hif_usb_dealloc_urbs(hif_dev);
1518
1519 return ret;
1520 }
1521 #endif
1522
1523 static struct usb_driver ath9k_hif_usb_driver = {
1524 .name = KBUILD_MODNAME,
1525 .probe = ath9k_hif_usb_probe,
1526 .disconnect = ath9k_hif_usb_disconnect,
1527 #ifdef CONFIG_PM
1528 .suspend = ath9k_hif_usb_suspend,
1529 .resume = ath9k_hif_usb_resume,
1530 .reset_resume = ath9k_hif_usb_resume,
1531 #endif
1532 .id_table = ath9k_hif_usb_ids,
1533 .soft_unbind = 1,
1534 .disable_hub_initiated_lpm = 1,
1535 };
1536
1537 int ath9k_hif_usb_init(void)
1538 {
1539 return usb_register(&ath9k_hif_usb_driver);
1540 }
1541
1542 void ath9k_hif_usb_exit(void)
1543 {
1544 usb_deregister(&ath9k_hif_usb_driver);
1545 }
Kernel DRM miscellaneous fixes and cross-tree changes