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(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
69 MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids);
70
71 static int __hif_usb_tx(struct hif_device_usb *hif_dev);
72
hif_usb_regout_cb(struct urb * urb)73 static 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;
96 free:
97 kfree_skb(cmd->skb);
98 kfree(cmd);
99 }
100
hif_usb_send_regout(struct hif_device_usb * hif_dev,struct sk_buff * skb)101 static 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
hif_usb_mgmt_cb(struct urb * urb)137 static 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 unsigned long flags;
142 bool txok = true;
143
144 if (!cmd || !cmd->skb || !cmd->hif_dev)
145 return;
146
147 hif_dev = cmd->hif_dev;
148
149 switch (urb->status) {
150 case 0:
151 break;
152 case -ENOENT:
153 case -ECONNRESET:
154 case -ENODEV:
155 case -ESHUTDOWN:
156 txok = false;
157
158 /*
159 * If the URBs are being flushed, no need to complete
160 * this packet.
161 */
162 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
163 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) {
164 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
165 dev_kfree_skb_any(cmd->skb);
166 kfree(cmd);
167 return;
168 }
169 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
170
171 break;
172 default:
173 txok = false;
174 break;
175 }
176
177 skb_pull(cmd->skb, 4);
178 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
179 cmd->skb, txok);
180 kfree(cmd);
181 }
182
hif_usb_send_mgmt(struct hif_device_usb * hif_dev,struct sk_buff * skb)183 static int hif_usb_send_mgmt(struct hif_device_usb *hif_dev,
184 struct sk_buff *skb)
185 {
186 struct urb *urb;
187 struct cmd_buf *cmd;
188 int ret = 0;
189 __le16 *hdr;
190
191 urb = usb_alloc_urb(0, GFP_ATOMIC);
192 if (urb == NULL)
193 return -ENOMEM;
194
195 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
196 if (cmd == NULL) {
197 usb_free_urb(urb);
198 return -ENOMEM;
199 }
200
201 cmd->skb = skb;
202 cmd->hif_dev = hif_dev;
203
204 hdr = skb_push(skb, 4);
205 *hdr++ = cpu_to_le16(skb->len - 4);
206 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG);
207
208 usb_fill_bulk_urb(urb, hif_dev->udev,
209 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
210 skb->data, skb->len,
211 hif_usb_mgmt_cb, cmd);
212
213 usb_anchor_urb(urb, &hif_dev->mgmt_submitted);
214 ret = usb_submit_urb(urb, GFP_ATOMIC);
215 if (ret) {
216 usb_unanchor_urb(urb);
217 kfree(cmd);
218 }
219 usb_free_urb(urb);
220
221 return ret;
222 }
223
ath9k_skb_queue_purge(struct hif_device_usb * hif_dev,struct sk_buff_head * list)224 static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev,
225 struct sk_buff_head *list)
226 {
227 struct sk_buff *skb;
228
229 while ((skb = __skb_dequeue(list)) != NULL) {
230 dev_kfree_skb_any(skb);
231 }
232 }
233
ath9k_skb_queue_complete(struct hif_device_usb * hif_dev,struct sk_buff_head * queue,bool txok)234 static inline void ath9k_skb_queue_complete(struct hif_device_usb *hif_dev,
235 struct sk_buff_head *queue,
236 bool txok)
237 {
238 struct sk_buff *skb;
239
240 while ((skb = __skb_dequeue(queue)) != NULL) {
241 #ifdef CONFIG_ATH9K_HTC_DEBUGFS
242 int ln = skb->len;
243 #endif
244 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
245 skb, txok);
246 if (txok) {
247 TX_STAT_INC(skb_success);
248 TX_STAT_ADD(skb_success_bytes, ln);
249 }
250 else
251 TX_STAT_INC(skb_failed);
252 }
253 }
254
hif_usb_tx_cb(struct urb * urb)255 static void hif_usb_tx_cb(struct urb *urb)
256 {
257 struct tx_buf *tx_buf = (struct tx_buf *) urb->context;
258 struct hif_device_usb *hif_dev;
259 bool txok = true;
260
261 if (!tx_buf || !tx_buf->hif_dev)
262 return;
263
264 hif_dev = tx_buf->hif_dev;
265
266 switch (urb->status) {
267 case 0:
268 break;
269 case -ENOENT:
270 case -ECONNRESET:
271 case -ENODEV:
272 case -ESHUTDOWN:
273 txok = false;
274
275 /*
276 * If the URBs are being flushed, no need to add this
277 * URB to the free list.
278 */
279 spin_lock(&hif_dev->tx.tx_lock);
280 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) {
281 spin_unlock(&hif_dev->tx.tx_lock);
282 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
283 return;
284 }
285 spin_unlock(&hif_dev->tx.tx_lock);
286
287 break;
288 default:
289 txok = false;
290 break;
291 }
292
293 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, txok);
294
295 /* Re-initialize the SKB queue */
296 tx_buf->len = tx_buf->offset = 0;
297 __skb_queue_head_init(&tx_buf->skb_queue);
298
299 /* Add this TX buffer to the free list */
300 spin_lock(&hif_dev->tx.tx_lock);
301 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
302 hif_dev->tx.tx_buf_cnt++;
303 if (!(hif_dev->tx.flags & HIF_USB_TX_STOP))
304 __hif_usb_tx(hif_dev); /* Check for pending SKBs */
305 TX_STAT_INC(buf_completed);
306 spin_unlock(&hif_dev->tx.tx_lock);
307 }
308
309 /* TX lock has to be taken */
__hif_usb_tx(struct hif_device_usb * hif_dev)310 static int __hif_usb_tx(struct hif_device_usb *hif_dev)
311 {
312 struct tx_buf *tx_buf = NULL;
313 struct sk_buff *nskb = NULL;
314 int ret = 0, i;
315 u16 tx_skb_cnt = 0;
316 u8 *buf;
317 __le16 *hdr;
318
319 if (hif_dev->tx.tx_skb_cnt == 0)
320 return 0;
321
322 /* Check if a free TX buffer is available */
323 if (list_empty(&hif_dev->tx.tx_buf))
324 return 0;
325
326 tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list);
327 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending);
328 hif_dev->tx.tx_buf_cnt--;
329
330 tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM);
331
332 for (i = 0; i < tx_skb_cnt; i++) {
333 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue);
334
335 /* Should never be NULL */
336 BUG_ON(!nskb);
337
338 hif_dev->tx.tx_skb_cnt--;
339
340 buf = tx_buf->buf;
341 buf += tx_buf->offset;
342 hdr = (__le16 *)buf;
343 *hdr++ = cpu_to_le16(nskb->len);
344 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG);
345 buf += 4;
346 memcpy(buf, nskb->data, nskb->len);
347 tx_buf->len = nskb->len + 4;
348
349 if (i < (tx_skb_cnt - 1))
350 tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4;
351
352 if (i == (tx_skb_cnt - 1))
353 tx_buf->len += tx_buf->offset;
354
355 __skb_queue_tail(&tx_buf->skb_queue, nskb);
356 TX_STAT_INC(skb_queued);
357 }
358
359 usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev,
360 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
361 tx_buf->buf, tx_buf->len,
362 hif_usb_tx_cb, tx_buf);
363
364 ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC);
365 if (ret) {
366 tx_buf->len = tx_buf->offset = 0;
367 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, false);
368 __skb_queue_head_init(&tx_buf->skb_queue);
369 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
370 hif_dev->tx.tx_buf_cnt++;
371 }
372
373 if (!ret)
374 TX_STAT_INC(buf_queued);
375
376 return ret;
377 }
378
hif_usb_send_tx(struct hif_device_usb * hif_dev,struct sk_buff * skb)379 static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb)
380 {
381 struct ath9k_htc_tx_ctl *tx_ctl;
382 unsigned long flags;
383 int ret = 0;
384
385 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
386
387 if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
388 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
389 return -ENODEV;
390 }
391
392 /* Check if the max queue count has been reached */
393 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) {
394 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
395 return -ENOMEM;
396 }
397
398 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
399
400 tx_ctl = HTC_SKB_CB(skb);
401
402 /* Mgmt/Beacon frames don't use the TX buffer pool */
403 if ((tx_ctl->type == ATH9K_HTC_MGMT) ||
404 (tx_ctl->type == ATH9K_HTC_BEACON)) {
405 ret = hif_usb_send_mgmt(hif_dev, skb);
406 }
407
408 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
409
410 if ((tx_ctl->type == ATH9K_HTC_NORMAL) ||
411 (tx_ctl->type == ATH9K_HTC_AMPDU)) {
412 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb);
413 hif_dev->tx.tx_skb_cnt++;
414 }
415
416 /* Check if AMPDUs have to be sent immediately */
417 if ((hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) &&
418 (hif_dev->tx.tx_skb_cnt < 2)) {
419 __hif_usb_tx(hif_dev);
420 }
421
422 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
423
424 return ret;
425 }
426
hif_usb_start(void * hif_handle)427 static void hif_usb_start(void *hif_handle)
428 {
429 struct hif_device_usb *hif_dev = hif_handle;
430 unsigned long flags;
431
432 hif_dev->flags |= HIF_USB_START;
433
434 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
435 hif_dev->tx.flags &= ~HIF_USB_TX_STOP;
436 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
437 }
438
hif_usb_stop(void * hif_handle)439 static void hif_usb_stop(void *hif_handle)
440 {
441 struct hif_device_usb *hif_dev = hif_handle;
442 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
443 unsigned long flags;
444
445 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
446 ath9k_skb_queue_complete(hif_dev, &hif_dev->tx.tx_skb_queue, false);
447 hif_dev->tx.tx_skb_cnt = 0;
448 hif_dev->tx.flags |= HIF_USB_TX_STOP;
449 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
450
451 /* The pending URBs have to be canceled. */
452 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
453 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
454 &hif_dev->tx.tx_pending, list) {
455 usb_get_urb(tx_buf->urb);
456 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
457 usb_kill_urb(tx_buf->urb);
458 list_del(&tx_buf->list);
459 usb_free_urb(tx_buf->urb);
460 kfree(tx_buf->buf);
461 kfree(tx_buf);
462 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
463 }
464 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
465
466 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
467 }
468
hif_usb_send(void * hif_handle,u8 pipe_id,struct sk_buff * skb)469 static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb)
470 {
471 struct hif_device_usb *hif_dev = hif_handle;
472 int ret = 0;
473
474 switch (pipe_id) {
475 case USB_WLAN_TX_PIPE:
476 ret = hif_usb_send_tx(hif_dev, skb);
477 break;
478 case USB_REG_OUT_PIPE:
479 ret = hif_usb_send_regout(hif_dev, skb);
480 break;
481 default:
482 dev_err(&hif_dev->udev->dev,
483 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id);
484 ret = -EINVAL;
485 break;
486 }
487
488 return ret;
489 }
490
check_index(struct sk_buff * skb,u8 idx)491 static inline bool check_index(struct sk_buff *skb, u8 idx)
492 {
493 struct ath9k_htc_tx_ctl *tx_ctl;
494
495 tx_ctl = HTC_SKB_CB(skb);
496
497 if ((tx_ctl->type == ATH9K_HTC_AMPDU) &&
498 (tx_ctl->sta_idx == idx))
499 return true;
500
501 return false;
502 }
503
hif_usb_sta_drain(void * hif_handle,u8 idx)504 static void hif_usb_sta_drain(void *hif_handle, u8 idx)
505 {
506 struct hif_device_usb *hif_dev = hif_handle;
507 struct sk_buff *skb, *tmp;
508 unsigned long flags;
509
510 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
511
512 skb_queue_walk_safe(&hif_dev->tx.tx_skb_queue, skb, tmp) {
513 if (check_index(skb, idx)) {
514 __skb_unlink(skb, &hif_dev->tx.tx_skb_queue);
515 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
516 skb, false);
517 hif_dev->tx.tx_skb_cnt--;
518 TX_STAT_INC(skb_failed);
519 }
520 }
521
522 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
523 }
524
525 static struct ath9k_htc_hif hif_usb = {
526 .transport = ATH9K_HIF_USB,
527 .name = "ath9k_hif_usb",
528
529 .control_ul_pipe = USB_REG_OUT_PIPE,
530 .control_dl_pipe = USB_REG_IN_PIPE,
531
532 .start = hif_usb_start,
533 .stop = hif_usb_stop,
534 .sta_drain = hif_usb_sta_drain,
535 .send = hif_usb_send,
536 };
537
ath9k_hif_usb_rx_stream(struct hif_device_usb * hif_dev,struct sk_buff * skb)538 static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev,
539 struct sk_buff *skb)
540 {
541 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER];
542 int index = 0, i, len = skb->len;
543 int rx_remain_len, rx_pkt_len;
544 u16 pool_index = 0;
545 u8 *ptr;
546
547 spin_lock(&hif_dev->rx_lock);
548
549 rx_remain_len = hif_dev->rx_remain_len;
550 rx_pkt_len = hif_dev->rx_transfer_len;
551
552 if (rx_remain_len != 0) {
553 struct sk_buff *remain_skb = hif_dev->remain_skb;
554
555 if (remain_skb) {
556 ptr = (u8 *) remain_skb->data;
557
558 index = rx_remain_len;
559 rx_remain_len -= hif_dev->rx_pad_len;
560 ptr += rx_pkt_len;
561
562 memcpy(ptr, skb->data, rx_remain_len);
563
564 rx_pkt_len += rx_remain_len;
565 hif_dev->rx_remain_len = 0;
566 skb_put(remain_skb, rx_pkt_len);
567
568 skb_pool[pool_index++] = remain_skb;
569
570 } else {
571 index = rx_remain_len;
572 }
573 }
574
575 spin_unlock(&hif_dev->rx_lock);
576
577 while (index < len) {
578 u16 pkt_len;
579 u16 pkt_tag;
580 u16 pad_len;
581 int chk_idx;
582
583 ptr = (u8 *) skb->data;
584
585 pkt_len = get_unaligned_le16(ptr + index);
586 pkt_tag = get_unaligned_le16(ptr + index + 2);
587
588 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) {
589 RX_STAT_INC(skb_dropped);
590 return;
591 }
592
593 pad_len = 4 - (pkt_len & 0x3);
594 if (pad_len == 4)
595 pad_len = 0;
596
597 chk_idx = index;
598 index = index + 4 + pkt_len + pad_len;
599
600 if (index > MAX_RX_BUF_SIZE) {
601 spin_lock(&hif_dev->rx_lock);
602 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE;
603 hif_dev->rx_transfer_len =
604 MAX_RX_BUF_SIZE - chk_idx - 4;
605 hif_dev->rx_pad_len = pad_len;
606
607 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
608 if (!nskb) {
609 dev_err(&hif_dev->udev->dev,
610 "ath9k_htc: RX memory allocation error\n");
611 spin_unlock(&hif_dev->rx_lock);
612 goto err;
613 }
614 skb_reserve(nskb, 32);
615 RX_STAT_INC(skb_allocated);
616
617 memcpy(nskb->data, &(skb->data[chk_idx+4]),
618 hif_dev->rx_transfer_len);
619
620 /* Record the buffer pointer */
621 hif_dev->remain_skb = nskb;
622 spin_unlock(&hif_dev->rx_lock);
623 } else {
624 if (pool_index == MAX_PKT_NUM_IN_TRANSFER) {
625 dev_err(&hif_dev->udev->dev,
626 "ath9k_htc: over RX MAX_PKT_NUM\n");
627 goto err;
628 }
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 goto err;
634 }
635 skb_reserve(nskb, 32);
636 RX_STAT_INC(skb_allocated);
637
638 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len);
639 skb_put(nskb, pkt_len);
640 skb_pool[pool_index++] = nskb;
641 }
642 }
643
644 err:
645 for (i = 0; i < pool_index; i++) {
646 RX_STAT_ADD(skb_completed_bytes, skb_pool[i]->len);
647 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i],
648 skb_pool[i]->len, USB_WLAN_RX_PIPE);
649 RX_STAT_INC(skb_completed);
650 }
651 }
652
ath9k_hif_usb_rx_cb(struct urb * urb)653 static void ath9k_hif_usb_rx_cb(struct urb *urb)
654 {
655 struct rx_buf *rx_buf = (struct rx_buf *)urb->context;
656 struct hif_device_usb *hif_dev = rx_buf->hif_dev;
657 struct sk_buff *skb = rx_buf->skb;
658 int ret;
659
660 if (!skb)
661 return;
662
663 if (!hif_dev)
664 goto free;
665
666 switch (urb->status) {
667 case 0:
668 break;
669 case -ENOENT:
670 case -ECONNRESET:
671 case -ENODEV:
672 case -ESHUTDOWN:
673 goto free;
674 default:
675 goto resubmit;
676 }
677
678 if (likely(urb->actual_length != 0)) {
679 skb_put(skb, urb->actual_length);
680 ath9k_hif_usb_rx_stream(hif_dev, skb);
681 }
682
683 resubmit:
684 skb_reset_tail_pointer(skb);
685 skb_trim(skb, 0);
686
687 usb_anchor_urb(urb, &hif_dev->rx_submitted);
688 ret = usb_submit_urb(urb, GFP_ATOMIC);
689 if (ret) {
690 usb_unanchor_urb(urb);
691 goto free;
692 }
693
694 return;
695 free:
696 kfree_skb(skb);
697 kfree(rx_buf);
698 }
699
ath9k_hif_usb_reg_in_cb(struct urb * urb)700 static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
701 {
702 struct rx_buf *rx_buf = (struct rx_buf *)urb->context;
703 struct hif_device_usb *hif_dev = rx_buf->hif_dev;
704 struct sk_buff *skb = rx_buf->skb;
705 struct sk_buff *nskb;
706 int ret;
707
708 if (!skb)
709 return;
710
711 if (!hif_dev)
712 goto free;
713
714 switch (urb->status) {
715 case 0:
716 break;
717 case -ENOENT:
718 case -ECONNRESET:
719 case -ENODEV:
720 case -ESHUTDOWN:
721 goto free;
722 default:
723 skb_reset_tail_pointer(skb);
724 skb_trim(skb, 0);
725
726 goto resubmit;
727 }
728
729 if (likely(urb->actual_length != 0)) {
730 skb_put(skb, urb->actual_length);
731
732 /* Process the command first */
733 ath9k_htc_rx_msg(hif_dev->htc_handle, skb,
734 skb->len, USB_REG_IN_PIPE);
735
736
737 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC);
738 if (!nskb) {
739 dev_err(&hif_dev->udev->dev,
740 "ath9k_htc: REG_IN memory allocation failure\n");
741 urb->context = NULL;
742 return;
743 }
744
745 rx_buf->skb = nskb;
746
747 usb_fill_int_urb(urb, hif_dev->udev,
748 usb_rcvintpipe(hif_dev->udev,
749 USB_REG_IN_PIPE),
750 nskb->data, MAX_REG_IN_BUF_SIZE,
751 ath9k_hif_usb_reg_in_cb, rx_buf, 1);
752 }
753
754 resubmit:
755 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
756 ret = usb_submit_urb(urb, GFP_ATOMIC);
757 if (ret) {
758 usb_unanchor_urb(urb);
759 goto free;
760 }
761
762 return;
763 free:
764 kfree_skb(skb);
765 kfree(rx_buf);
766 urb->context = NULL;
767 }
768
ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb * hif_dev)769 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
770 {
771 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
772 unsigned long flags;
773
774 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
775 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
776 &hif_dev->tx.tx_buf, list) {
777 usb_get_urb(tx_buf->urb);
778 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
779 usb_kill_urb(tx_buf->urb);
780 list_del(&tx_buf->list);
781 usb_free_urb(tx_buf->urb);
782 kfree(tx_buf->buf);
783 kfree(tx_buf);
784 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
785 }
786 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
787
788 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
789 hif_dev->tx.flags |= HIF_USB_TX_FLUSH;
790 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
791
792 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
793 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
794 &hif_dev->tx.tx_pending, list) {
795 usb_get_urb(tx_buf->urb);
796 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
797 usb_kill_urb(tx_buf->urb);
798 list_del(&tx_buf->list);
799 usb_free_urb(tx_buf->urb);
800 kfree(tx_buf->buf);
801 kfree(tx_buf);
802 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
803 }
804 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
805
806 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
807 }
808
ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb * hif_dev)809 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev)
810 {
811 struct tx_buf *tx_buf;
812 int i;
813
814 INIT_LIST_HEAD(&hif_dev->tx.tx_buf);
815 INIT_LIST_HEAD(&hif_dev->tx.tx_pending);
816 spin_lock_init(&hif_dev->tx.tx_lock);
817 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue);
818 init_usb_anchor(&hif_dev->mgmt_submitted);
819
820 for (i = 0; i < MAX_TX_URB_NUM; i++) {
821 tx_buf = kzalloc(sizeof(*tx_buf), GFP_KERNEL);
822 if (!tx_buf)
823 goto err;
824
825 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL);
826 if (!tx_buf->buf)
827 goto err;
828
829 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL);
830 if (!tx_buf->urb)
831 goto err;
832
833 tx_buf->hif_dev = hif_dev;
834 __skb_queue_head_init(&tx_buf->skb_queue);
835
836 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
837 }
838
839 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM;
840
841 return 0;
842 err:
843 if (tx_buf) {
844 kfree(tx_buf->buf);
845 kfree(tx_buf);
846 }
847 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
848 return -ENOMEM;
849 }
850
ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb * hif_dev)851 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev)
852 {
853 usb_kill_anchored_urbs(&hif_dev->rx_submitted);
854 }
855
ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb * hif_dev)856 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
857 {
858 struct rx_buf *rx_buf = NULL;
859 struct sk_buff *skb = NULL;
860 struct urb *urb = NULL;
861 int i, ret;
862
863 init_usb_anchor(&hif_dev->rx_submitted);
864 spin_lock_init(&hif_dev->rx_lock);
865
866 for (i = 0; i < MAX_RX_URB_NUM; i++) {
867
868 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL);
869 if (!rx_buf) {
870 ret = -ENOMEM;
871 goto err_rxb;
872 }
873
874 /* Allocate URB */
875 urb = usb_alloc_urb(0, GFP_KERNEL);
876 if (urb == NULL) {
877 ret = -ENOMEM;
878 goto err_urb;
879 }
880
881 /* Allocate buffer */
882 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL);
883 if (!skb) {
884 ret = -ENOMEM;
885 goto err_skb;
886 }
887
888 rx_buf->hif_dev = hif_dev;
889 rx_buf->skb = skb;
890
891 usb_fill_bulk_urb(urb, hif_dev->udev,
892 usb_rcvbulkpipe(hif_dev->udev,
893 USB_WLAN_RX_PIPE),
894 skb->data, MAX_RX_BUF_SIZE,
895 ath9k_hif_usb_rx_cb, rx_buf);
896
897 /* Anchor URB */
898 usb_anchor_urb(urb, &hif_dev->rx_submitted);
899
900 /* Submit URB */
901 ret = usb_submit_urb(urb, GFP_KERNEL);
902 if (ret) {
903 usb_unanchor_urb(urb);
904 goto err_submit;
905 }
906
907 /*
908 * Drop reference count.
909 * This ensures that the URB is freed when killing them.
910 */
911 usb_free_urb(urb);
912 }
913
914 return 0;
915
916 err_submit:
917 kfree_skb(skb);
918 err_skb:
919 usb_free_urb(urb);
920 err_urb:
921 kfree(rx_buf);
922 err_rxb:
923 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
924 return ret;
925 }
926
ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb * hif_dev)927 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev)
928 {
929 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted);
930 }
931
ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb * hif_dev)932 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev)
933 {
934 struct rx_buf *rx_buf = NULL;
935 struct sk_buff *skb = NULL;
936 struct urb *urb = NULL;
937 int i, ret;
938
939 init_usb_anchor(&hif_dev->reg_in_submitted);
940
941 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) {
942
943 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL);
944 if (!rx_buf) {
945 ret = -ENOMEM;
946 goto err_rxb;
947 }
948
949 /* Allocate URB */
950 urb = usb_alloc_urb(0, GFP_KERNEL);
951 if (urb == NULL) {
952 ret = -ENOMEM;
953 goto err_urb;
954 }
955
956 /* Allocate buffer */
957 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL);
958 if (!skb) {
959 ret = -ENOMEM;
960 goto err_skb;
961 }
962
963 rx_buf->hif_dev = hif_dev;
964 rx_buf->skb = skb;
965
966 usb_fill_int_urb(urb, hif_dev->udev,
967 usb_rcvintpipe(hif_dev->udev,
968 USB_REG_IN_PIPE),
969 skb->data, MAX_REG_IN_BUF_SIZE,
970 ath9k_hif_usb_reg_in_cb, rx_buf, 1);
971
972 /* Anchor URB */
973 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
974
975 /* Submit URB */
976 ret = usb_submit_urb(urb, GFP_KERNEL);
977 if (ret) {
978 usb_unanchor_urb(urb);
979 goto err_submit;
980 }
981
982 /*
983 * Drop reference count.
984 * This ensures that the URB is freed when killing them.
985 */
986 usb_free_urb(urb);
987 }
988
989 return 0;
990
991 err_submit:
992 kfree_skb(skb);
993 err_skb:
994 usb_free_urb(urb);
995 err_urb:
996 kfree(rx_buf);
997 err_rxb:
998 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
999 return ret;
1000 }
1001
ath9k_hif_usb_alloc_urbs(struct hif_device_usb * hif_dev)1002 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev)
1003 {
1004 /* Register Write */
1005 init_usb_anchor(&hif_dev->regout_submitted);
1006
1007 /* TX */
1008 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0)
1009 goto err;
1010
1011 /* RX */
1012 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0)
1013 goto err_rx;
1014
1015 /* Register Read */
1016 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0)
1017 goto err_reg;
1018
1019 return 0;
1020 err_reg:
1021 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
1022 err_rx:
1023 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
1024 err:
1025 return -ENOMEM;
1026 }
1027
ath9k_hif_usb_dealloc_urbs(struct hif_device_usb * hif_dev)1028 void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev)
1029 {
1030 usb_kill_anchored_urbs(&hif_dev->regout_submitted);
1031 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
1032 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
1033 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
1034 }
1035
ath9k_hif_usb_download_fw(struct hif_device_usb * hif_dev)1036 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev)
1037 {
1038 int transfer, err;
1039 const void *data = hif_dev->fw_data;
1040 size_t len = hif_dev->fw_size;
1041 u32 addr = AR9271_FIRMWARE;
1042 u8 *buf = kzalloc(4096, GFP_KERNEL);
1043 u32 firm_offset;
1044
1045 if (!buf)
1046 return -ENOMEM;
1047
1048 while (len) {
1049 transfer = min_t(size_t, len, 4096);
1050 memcpy(buf, data, transfer);
1051
1052 err = usb_control_msg(hif_dev->udev,
1053 usb_sndctrlpipe(hif_dev->udev, 0),
1054 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT,
1055 addr >> 8, 0, buf, transfer,
1056 USB_MSG_TIMEOUT);
1057 if (err < 0) {
1058 kfree(buf);
1059 return err;
1060 }
1061
1062 len -= transfer;
1063 data += transfer;
1064 addr += transfer;
1065 }
1066 kfree(buf);
1067
1068 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1069 firm_offset = AR7010_FIRMWARE_TEXT;
1070 else
1071 firm_offset = AR9271_FIRMWARE_TEXT;
1072
1073 /*
1074 * Issue FW download complete command to firmware.
1075 */
1076 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0),
1077 FIRMWARE_DOWNLOAD_COMP,
1078 0x40 | USB_DIR_OUT,
1079 firm_offset >> 8, 0, NULL, 0, USB_MSG_TIMEOUT);
1080 if (err)
1081 return -EIO;
1082
1083 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n",
1084 hif_dev->fw_name, (unsigned long) hif_dev->fw_size);
1085
1086 return 0;
1087 }
1088
ath9k_hif_usb_dev_init(struct hif_device_usb * hif_dev)1089 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev)
1090 {
1091 int ret;
1092
1093 ret = ath9k_hif_usb_download_fw(hif_dev);
1094 if (ret) {
1095 dev_err(&hif_dev->udev->dev,
1096 "ath9k_htc: Firmware - %s download failed\n",
1097 hif_dev->fw_name);
1098 return ret;
1099 }
1100
1101 /* Alloc URBs */
1102 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1103 if (ret) {
1104 dev_err(&hif_dev->udev->dev,
1105 "ath9k_htc: Unable to allocate URBs\n");
1106 return ret;
1107 }
1108
1109 return 0;
1110 }
1111
ath9k_hif_usb_dev_deinit(struct hif_device_usb * hif_dev)1112 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev)
1113 {
1114 ath9k_hif_usb_dealloc_urbs(hif_dev);
1115 }
1116
1117 /*
1118 * If initialization fails or the FW cannot be retrieved,
1119 * detach the device.
1120 */
ath9k_hif_usb_firmware_fail(struct hif_device_usb * hif_dev)1121 static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev)
1122 {
1123 struct device *dev = &hif_dev->udev->dev;
1124 struct device *parent = dev->parent;
1125
1126 complete_all(&hif_dev->fw_done);
1127
1128 if (parent)
1129 device_lock(parent);
1130
1131 device_release_driver(dev);
1132
1133 if (parent)
1134 device_unlock(parent);
1135 }
1136
1137 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context);
1138
1139 /* taken from iwlwifi */
ath9k_hif_request_firmware(struct hif_device_usb * hif_dev,bool first)1140 static int ath9k_hif_request_firmware(struct hif_device_usb *hif_dev,
1141 bool first)
1142 {
1143 char index[8], *chip;
1144 int ret;
1145
1146 if (first) {
1147 if (htc_use_dev_fw) {
1148 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX + 1;
1149 sprintf(index, "%s", "dev");
1150 } else {
1151 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX;
1152 sprintf(index, "%d", hif_dev->fw_minor_index);
1153 }
1154 } else {
1155 hif_dev->fw_minor_index--;
1156 sprintf(index, "%d", hif_dev->fw_minor_index);
1157 }
1158
1159 /* test for FW 1.3 */
1160 if (MAJOR_VERSION_REQ == 1 && hif_dev->fw_minor_index == 3) {
1161 const char *filename;
1162
1163 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1164 filename = FIRMWARE_AR7010_1_1;
1165 else
1166 filename = FIRMWARE_AR9271;
1167
1168 /* expected fw locations:
1169 * - htc_9271.fw (stable version 1.3, depricated)
1170 */
1171 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name),
1172 "%s", filename);
1173
1174 } else if (hif_dev->fw_minor_index < FIRMWARE_MINOR_IDX_MIN) {
1175 dev_err(&hif_dev->udev->dev, "no suitable firmware found!\n");
1176
1177 return -ENOENT;
1178 } else {
1179 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1180 chip = "7010";
1181 else
1182 chip = "9271";
1183
1184 /* expected fw locations:
1185 * - ath9k_htc/htc_9271-1.dev.0.fw (development version)
1186 * - ath9k_htc/htc_9271-1.4.0.fw (stable version)
1187 */
1188 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name),
1189 "%s/htc_%s-%d.%s.0.fw", HTC_FW_PATH,
1190 chip, MAJOR_VERSION_REQ, index);
1191 }
1192
1193 ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name,
1194 &hif_dev->udev->dev, GFP_KERNEL,
1195 hif_dev, ath9k_hif_usb_firmware_cb);
1196 if (ret) {
1197 dev_err(&hif_dev->udev->dev,
1198 "ath9k_htc: Async request for firmware %s failed\n",
1199 hif_dev->fw_name);
1200 return ret;
1201 }
1202
1203 dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n",
1204 hif_dev->fw_name);
1205
1206 return ret;
1207 }
1208
ath9k_hif_usb_firmware_cb(const struct firmware * fw,void * context)1209 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context)
1210 {
1211 struct hif_device_usb *hif_dev = context;
1212 int ret;
1213
1214 if (!fw) {
1215 ret = ath9k_hif_request_firmware(hif_dev, false);
1216 if (!ret)
1217 return;
1218
1219 dev_err(&hif_dev->udev->dev,
1220 "ath9k_htc: Failed to get firmware %s\n",
1221 hif_dev->fw_name);
1222 goto err_fw;
1223 }
1224
1225 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb,
1226 &hif_dev->udev->dev);
1227 if (hif_dev->htc_handle == NULL)
1228 goto err_dev_alloc;
1229
1230 hif_dev->fw_data = fw->data;
1231 hif_dev->fw_size = fw->size;
1232
1233 /* Proceed with initialization */
1234
1235 ret = ath9k_hif_usb_dev_init(hif_dev);
1236 if (ret)
1237 goto err_dev_init;
1238
1239 ret = ath9k_htc_hw_init(hif_dev->htc_handle,
1240 &hif_dev->interface->dev,
1241 hif_dev->usb_device_id->idProduct,
1242 hif_dev->udev->product,
1243 hif_dev->usb_device_id->driver_info);
1244 if (ret) {
1245 ret = -EINVAL;
1246 goto err_htc_hw_init;
1247 }
1248
1249 release_firmware(fw);
1250 hif_dev->flags |= HIF_USB_READY;
1251 complete_all(&hif_dev->fw_done);
1252
1253 return;
1254
1255 err_htc_hw_init:
1256 ath9k_hif_usb_dev_deinit(hif_dev);
1257 err_dev_init:
1258 ath9k_htc_hw_free(hif_dev->htc_handle);
1259 err_dev_alloc:
1260 release_firmware(fw);
1261 err_fw:
1262 ath9k_hif_usb_firmware_fail(hif_dev);
1263 }
1264
1265 /*
1266 * An exact copy of the function from zd1211rw.
1267 */
send_eject_command(struct usb_interface * interface)1268 static int send_eject_command(struct usb_interface *interface)
1269 {
1270 struct usb_device *udev = interface_to_usbdev(interface);
1271 struct usb_host_interface *iface_desc = interface->cur_altsetting;
1272 struct usb_endpoint_descriptor *endpoint;
1273 unsigned char *cmd;
1274 u8 bulk_out_ep;
1275 int r;
1276
1277 if (iface_desc->desc.bNumEndpoints < 2)
1278 return -ENODEV;
1279
1280 /* Find bulk out endpoint */
1281 for (r = 1; r >= 0; r--) {
1282 endpoint = &iface_desc->endpoint[r].desc;
1283 if (usb_endpoint_dir_out(endpoint) &&
1284 usb_endpoint_xfer_bulk(endpoint)) {
1285 bulk_out_ep = endpoint->bEndpointAddress;
1286 break;
1287 }
1288 }
1289 if (r == -1) {
1290 dev_err(&udev->dev,
1291 "ath9k_htc: Could not find bulk out endpoint\n");
1292 return -ENODEV;
1293 }
1294
1295 cmd = kzalloc(31, GFP_KERNEL);
1296 if (cmd == NULL)
1297 return -ENODEV;
1298
1299 /* USB bulk command block */
1300 cmd[0] = 0x55; /* bulk command signature */
1301 cmd[1] = 0x53; /* bulk command signature */
1302 cmd[2] = 0x42; /* bulk command signature */
1303 cmd[3] = 0x43; /* bulk command signature */
1304 cmd[14] = 6; /* command length */
1305
1306 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
1307 cmd[19] = 0x2; /* eject disc */
1308
1309 dev_info(&udev->dev, "Ejecting storage device...\n");
1310 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
1311 cmd, 31, NULL, 2 * USB_MSG_TIMEOUT);
1312 kfree(cmd);
1313 if (r)
1314 return r;
1315
1316 /* At this point, the device disconnects and reconnects with the real
1317 * ID numbers. */
1318
1319 usb_set_intfdata(interface, NULL);
1320 return 0;
1321 }
1322
ath9k_hif_usb_probe(struct usb_interface * interface,const struct usb_device_id * id)1323 static int ath9k_hif_usb_probe(struct usb_interface *interface,
1324 const struct usb_device_id *id)
1325 {
1326 struct usb_device *udev = interface_to_usbdev(interface);
1327 struct hif_device_usb *hif_dev;
1328 int ret = 0;
1329
1330 if (id->driver_info == STORAGE_DEVICE)
1331 return send_eject_command(interface);
1332
1333 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL);
1334 if (!hif_dev) {
1335 ret = -ENOMEM;
1336 goto err_alloc;
1337 }
1338
1339 usb_get_dev(udev);
1340
1341 hif_dev->udev = udev;
1342 hif_dev->interface = interface;
1343 hif_dev->usb_device_id = id;
1344 #ifdef CONFIG_PM
1345 udev->reset_resume = 1;
1346 #endif
1347 usb_set_intfdata(interface, hif_dev);
1348
1349 init_completion(&hif_dev->fw_done);
1350
1351 ret = ath9k_hif_request_firmware(hif_dev, true);
1352 if (ret)
1353 goto err_fw_req;
1354
1355 return ret;
1356
1357 err_fw_req:
1358 usb_set_intfdata(interface, NULL);
1359 kfree(hif_dev);
1360 usb_put_dev(udev);
1361 err_alloc:
1362 return ret;
1363 }
1364
ath9k_hif_usb_reboot(struct usb_device * udev)1365 static void ath9k_hif_usb_reboot(struct usb_device *udev)
1366 {
1367 u32 reboot_cmd = 0xffffffff;
1368 void *buf;
1369 int ret;
1370
1371 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL);
1372 if (!buf)
1373 return;
1374
1375 ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE),
1376 buf, 4, NULL, USB_MSG_TIMEOUT);
1377 if (ret)
1378 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
1379
1380 kfree(buf);
1381 }
1382
ath9k_hif_usb_disconnect(struct usb_interface * interface)1383 static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
1384 {
1385 struct usb_device *udev = interface_to_usbdev(interface);
1386 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1387 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false;
1388
1389 if (!hif_dev)
1390 return;
1391
1392 wait_for_completion(&hif_dev->fw_done);
1393
1394 if (hif_dev->flags & HIF_USB_READY) {
1395 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged);
1396 ath9k_hif_usb_dev_deinit(hif_dev);
1397 ath9k_destroy_wmi(hif_dev->htc_handle->drv_priv);
1398 ath9k_htc_hw_free(hif_dev->htc_handle);
1399 }
1400
1401 usb_set_intfdata(interface, NULL);
1402
1403 /* If firmware was loaded we should drop it
1404 * go back to first stage bootloader. */
1405 if (!unplugged && (hif_dev->flags & HIF_USB_READY))
1406 ath9k_hif_usb_reboot(udev);
1407
1408 kfree(hif_dev);
1409 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");
1410 usb_put_dev(udev);
1411 }
1412
1413 #ifdef CONFIG_PM
ath9k_hif_usb_suspend(struct usb_interface * interface,pm_message_t message)1414 static int ath9k_hif_usb_suspend(struct usb_interface *interface,
1415 pm_message_t message)
1416 {
1417 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1418
1419 /*
1420 * The device has to be set to FULLSLEEP mode in case no
1421 * interface is up.
1422 */
1423 if (!(hif_dev->flags & HIF_USB_START))
1424 ath9k_htc_suspend(hif_dev->htc_handle);
1425
1426 wait_for_completion(&hif_dev->fw_done);
1427
1428 if (hif_dev->flags & HIF_USB_READY)
1429 ath9k_hif_usb_dealloc_urbs(hif_dev);
1430
1431 return 0;
1432 }
1433
ath9k_hif_usb_resume(struct usb_interface * interface)1434 static int ath9k_hif_usb_resume(struct usb_interface *interface)
1435 {
1436 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1437 struct htc_target *htc_handle = hif_dev->htc_handle;
1438 int ret;
1439 const struct firmware *fw;
1440
1441 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1442 if (ret)
1443 return ret;
1444
1445 if (hif_dev->flags & HIF_USB_READY) {
1446 /* request cached firmware during suspend/resume cycle */
1447 ret = request_firmware(&fw, hif_dev->fw_name,
1448 &hif_dev->udev->dev);
1449 if (ret)
1450 goto fail_resume;
1451
1452 hif_dev->fw_data = fw->data;
1453 hif_dev->fw_size = fw->size;
1454 ret = ath9k_hif_usb_download_fw(hif_dev);
1455 release_firmware(fw);
1456 if (ret)
1457 goto fail_resume;
1458 } else {
1459 ath9k_hif_usb_dealloc_urbs(hif_dev);
1460 return -EIO;
1461 }
1462
1463 mdelay(100);
1464
1465 ret = ath9k_htc_resume(htc_handle);
1466
1467 if (ret)
1468 goto fail_resume;
1469
1470 return 0;
1471
1472 fail_resume:
1473 ath9k_hif_usb_dealloc_urbs(hif_dev);
1474
1475 return ret;
1476 }
1477 #endif
1478
1479 static struct usb_driver ath9k_hif_usb_driver = {
1480 .name = KBUILD_MODNAME,
1481 .probe = ath9k_hif_usb_probe,
1482 .disconnect = ath9k_hif_usb_disconnect,
1483 #ifdef CONFIG_PM
1484 .suspend = ath9k_hif_usb_suspend,
1485 .resume = ath9k_hif_usb_resume,
1486 .reset_resume = ath9k_hif_usb_resume,
1487 #endif
1488 .id_table = ath9k_hif_usb_ids,
1489 .soft_unbind = 1,
1490 .disable_hub_initiated_lpm = 1,
1491 };
1492
ath9k_hif_usb_init(void)1493 int ath9k_hif_usb_init(void)
1494 {
1495 return usb_register(&ath9k_hif_usb_driver);
1496 }
1497
ath9k_hif_usb_exit(void)1498 void ath9k_hif_usb_exit(void)
1499 {
1500 usb_deregister(&ath9k_hif_usb_driver);
1501 }
1502
