Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[deliverable/linux.git] / drivers / net / wireless / ath / ath9k / hif_usb.c
1 /*
2 * Copyright (c) 2010 Atheros Communications Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include "htc.h"
18
19 /* identify firmware images */
20 #define FIRMWARE_AR7010 "ar7010.fw"
21 #define FIRMWARE_AR7010_1_1 "ar7010_1_1.fw"
22 #define FIRMWARE_AR9271 "ar9271.fw"
23
24 MODULE_FIRMWARE(FIRMWARE_AR7010);
25 MODULE_FIRMWARE(FIRMWARE_AR7010_1_1);
26 MODULE_FIRMWARE(FIRMWARE_AR9271);
27
28 static struct usb_device_id ath9k_hif_usb_ids[] = {
29 { USB_DEVICE(0x0cf3, 0x9271) }, /* Atheros */
30 { USB_DEVICE(0x0cf3, 0x1006) }, /* Atheros */
31 { USB_DEVICE(0x0cf3, 0x7010) }, /* Atheros */
32 { USB_DEVICE(0x0cf3, 0x7015) }, /* Atheros */
33 { USB_DEVICE(0x0846, 0x9030) }, /* Netgear N150 */
34 { USB_DEVICE(0x0846, 0x9018) }, /* Netgear WNDA3200 */
35 { USB_DEVICE(0x07D1, 0x3A10) }, /* Dlink Wireless 150 */
36 { USB_DEVICE(0x13D3, 0x3327) }, /* Azurewave */
37 { USB_DEVICE(0x13D3, 0x3328) }, /* Azurewave */
38 { USB_DEVICE(0x13D3, 0x3346) }, /* IMC Networks */
39 { USB_DEVICE(0x13D3, 0x3348) }, /* Azurewave */
40 { USB_DEVICE(0x13D3, 0x3349) }, /* Azurewave */
41 { USB_DEVICE(0x13D3, 0x3350) }, /* Azurewave */
42 { USB_DEVICE(0x04CA, 0x4605) }, /* Liteon */
43 { USB_DEVICE(0x083A, 0xA704) }, /* SMC Networks */
44 { USB_DEVICE(0x040D, 0x3801) }, /* VIA */
45 { USB_DEVICE(0x1668, 0x1200) }, /* Verizon */
46 { },
47 };
48
49 MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids);
50
51 static int __hif_usb_tx(struct hif_device_usb *hif_dev);
52
53 static void hif_usb_regout_cb(struct urb *urb)
54 {
55 struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
56
57 switch (urb->status) {
58 case 0:
59 break;
60 case -ENOENT:
61 case -ECONNRESET:
62 case -ENODEV:
63 case -ESHUTDOWN:
64 goto free;
65 default:
66 break;
67 }
68
69 if (cmd) {
70 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
71 cmd->skb, 1);
72 kfree(cmd);
73 }
74
75 return;
76 free:
77 kfree_skb(cmd->skb);
78 kfree(cmd);
79 }
80
81 static int hif_usb_send_regout(struct hif_device_usb *hif_dev,
82 struct sk_buff *skb)
83 {
84 struct urb *urb;
85 struct cmd_buf *cmd;
86 int ret = 0;
87
88 urb = usb_alloc_urb(0, GFP_KERNEL);
89 if (urb == NULL)
90 return -ENOMEM;
91
92 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
93 if (cmd == NULL) {
94 usb_free_urb(urb);
95 return -ENOMEM;
96 }
97
98 cmd->skb = skb;
99 cmd->hif_dev = hif_dev;
100
101 usb_fill_bulk_urb(urb, hif_dev->udev,
102 usb_sndbulkpipe(hif_dev->udev, USB_REG_OUT_PIPE),
103 skb->data, skb->len,
104 hif_usb_regout_cb, cmd);
105
106 usb_anchor_urb(urb, &hif_dev->regout_submitted);
107 ret = usb_submit_urb(urb, GFP_KERNEL);
108 if (ret) {
109 usb_unanchor_urb(urb);
110 kfree(cmd);
111 }
112 usb_free_urb(urb);
113
114 return ret;
115 }
116
117 static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev,
118 struct sk_buff_head *list)
119 {
120 struct sk_buff *skb;
121
122 while ((skb = __skb_dequeue(list)) != NULL) {
123 dev_kfree_skb_any(skb);
124 TX_STAT_INC(skb_dropped);
125 }
126 }
127
128 static void hif_usb_tx_cb(struct urb *urb)
129 {
130 struct tx_buf *tx_buf = (struct tx_buf *) urb->context;
131 struct hif_device_usb *hif_dev;
132 struct sk_buff *skb;
133
134 if (!tx_buf || !tx_buf->hif_dev)
135 return;
136
137 hif_dev = tx_buf->hif_dev;
138
139 switch (urb->status) {
140 case 0:
141 break;
142 case -ENOENT:
143 case -ECONNRESET:
144 case -ENODEV:
145 case -ESHUTDOWN:
146 /*
147 * The URB has been killed, free the SKBs
148 * and return.
149 */
150 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
151 return;
152 default:
153 break;
154 }
155
156 /* Check if TX has been stopped */
157 spin_lock(&hif_dev->tx.tx_lock);
158 if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
159 spin_unlock(&hif_dev->tx.tx_lock);
160 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
161 goto add_free;
162 }
163 spin_unlock(&hif_dev->tx.tx_lock);
164
165 /* Complete the queued SKBs. */
166 while ((skb = __skb_dequeue(&tx_buf->skb_queue)) != NULL) {
167 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
168 skb, 1);
169 TX_STAT_INC(skb_completed);
170 }
171
172 add_free:
173 /* Re-initialize the SKB queue */
174 tx_buf->len = tx_buf->offset = 0;
175 __skb_queue_head_init(&tx_buf->skb_queue);
176
177 /* Add this TX buffer to the free list */
178 spin_lock(&hif_dev->tx.tx_lock);
179 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
180 hif_dev->tx.tx_buf_cnt++;
181 if (!(hif_dev->tx.flags & HIF_USB_TX_STOP))
182 __hif_usb_tx(hif_dev); /* Check for pending SKBs */
183 TX_STAT_INC(buf_completed);
184 spin_unlock(&hif_dev->tx.tx_lock);
185 }
186
187 /* TX lock has to be taken */
188 static int __hif_usb_tx(struct hif_device_usb *hif_dev)
189 {
190 struct tx_buf *tx_buf = NULL;
191 struct sk_buff *nskb = NULL;
192 int ret = 0, i;
193 u16 *hdr, tx_skb_cnt = 0;
194 u8 *buf;
195
196 if (hif_dev->tx.tx_skb_cnt == 0)
197 return 0;
198
199 /* Check if a free TX buffer is available */
200 if (list_empty(&hif_dev->tx.tx_buf))
201 return 0;
202
203 tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list);
204 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending);
205 hif_dev->tx.tx_buf_cnt--;
206
207 tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM);
208
209 for (i = 0; i < tx_skb_cnt; i++) {
210 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue);
211
212 /* Should never be NULL */
213 BUG_ON(!nskb);
214
215 hif_dev->tx.tx_skb_cnt--;
216
217 buf = tx_buf->buf;
218 buf += tx_buf->offset;
219 hdr = (u16 *)buf;
220 *hdr++ = nskb->len;
221 *hdr++ = ATH_USB_TX_STREAM_MODE_TAG;
222 buf += 4;
223 memcpy(buf, nskb->data, nskb->len);
224 tx_buf->len = nskb->len + 4;
225
226 if (i < (tx_skb_cnt - 1))
227 tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4;
228
229 if (i == (tx_skb_cnt - 1))
230 tx_buf->len += tx_buf->offset;
231
232 __skb_queue_tail(&tx_buf->skb_queue, nskb);
233 TX_STAT_INC(skb_queued);
234 }
235
236 usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev,
237 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
238 tx_buf->buf, tx_buf->len,
239 hif_usb_tx_cb, tx_buf);
240
241 ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC);
242 if (ret) {
243 tx_buf->len = tx_buf->offset = 0;
244 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
245 __skb_queue_head_init(&tx_buf->skb_queue);
246 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
247 hif_dev->tx.tx_buf_cnt++;
248 }
249
250 if (!ret)
251 TX_STAT_INC(buf_queued);
252
253 return ret;
254 }
255
256 static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb,
257 struct ath9k_htc_tx_ctl *tx_ctl)
258 {
259 unsigned long flags;
260
261 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
262
263 if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
264 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
265 return -ENODEV;
266 }
267
268 /* Check if the max queue count has been reached */
269 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) {
270 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
271 return -ENOMEM;
272 }
273
274 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb);
275 hif_dev->tx.tx_skb_cnt++;
276
277 /* Send normal frames immediately */
278 if (!tx_ctl || (tx_ctl && (tx_ctl->type == ATH9K_HTC_NORMAL)))
279 __hif_usb_tx(hif_dev);
280
281 /* Check if AMPDUs have to be sent immediately */
282 if (tx_ctl && (tx_ctl->type == ATH9K_HTC_AMPDU) &&
283 (hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) &&
284 (hif_dev->tx.tx_skb_cnt < 2)) {
285 __hif_usb_tx(hif_dev);
286 }
287
288 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
289
290 return 0;
291 }
292
293 static void hif_usb_start(void *hif_handle, u8 pipe_id)
294 {
295 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
296 unsigned long flags;
297
298 hif_dev->flags |= HIF_USB_START;
299
300 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
301 hif_dev->tx.flags &= ~HIF_USB_TX_STOP;
302 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
303 }
304
305 static void hif_usb_stop(void *hif_handle, u8 pipe_id)
306 {
307 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
308 unsigned long flags;
309
310 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
311 ath9k_skb_queue_purge(hif_dev, &hif_dev->tx.tx_skb_queue);
312 hif_dev->tx.tx_skb_cnt = 0;
313 hif_dev->tx.flags |= HIF_USB_TX_STOP;
314 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
315 }
316
317 static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb,
318 struct ath9k_htc_tx_ctl *tx_ctl)
319 {
320 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
321 int ret = 0;
322
323 switch (pipe_id) {
324 case USB_WLAN_TX_PIPE:
325 ret = hif_usb_send_tx(hif_dev, skb, tx_ctl);
326 break;
327 case USB_REG_OUT_PIPE:
328 ret = hif_usb_send_regout(hif_dev, skb);
329 break;
330 default:
331 dev_err(&hif_dev->udev->dev,
332 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id);
333 ret = -EINVAL;
334 break;
335 }
336
337 return ret;
338 }
339
340 static struct ath9k_htc_hif hif_usb = {
341 .transport = ATH9K_HIF_USB,
342 .name = "ath9k_hif_usb",
343
344 .control_ul_pipe = USB_REG_OUT_PIPE,
345 .control_dl_pipe = USB_REG_IN_PIPE,
346
347 .start = hif_usb_start,
348 .stop = hif_usb_stop,
349 .send = hif_usb_send,
350 };
351
352 static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev,
353 struct sk_buff *skb)
354 {
355 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER];
356 int index = 0, i = 0, chk_idx, len = skb->len;
357 int rx_remain_len = 0, rx_pkt_len = 0;
358 u16 pkt_len, pkt_tag, pool_index = 0;
359 u8 *ptr;
360
361 spin_lock(&hif_dev->rx_lock);
362
363 rx_remain_len = hif_dev->rx_remain_len;
364 rx_pkt_len = hif_dev->rx_transfer_len;
365
366 if (rx_remain_len != 0) {
367 struct sk_buff *remain_skb = hif_dev->remain_skb;
368
369 if (remain_skb) {
370 ptr = (u8 *) remain_skb->data;
371
372 index = rx_remain_len;
373 rx_remain_len -= hif_dev->rx_pad_len;
374 ptr += rx_pkt_len;
375
376 memcpy(ptr, skb->data, rx_remain_len);
377
378 rx_pkt_len += rx_remain_len;
379 hif_dev->rx_remain_len = 0;
380 skb_put(remain_skb, rx_pkt_len);
381
382 skb_pool[pool_index++] = remain_skb;
383
384 } else {
385 index = rx_remain_len;
386 }
387 }
388
389 spin_unlock(&hif_dev->rx_lock);
390
391 while (index < len) {
392 ptr = (u8 *) skb->data;
393
394 pkt_len = ptr[index] + (ptr[index+1] << 8);
395 pkt_tag = ptr[index+2] + (ptr[index+3] << 8);
396
397 if (pkt_tag == ATH_USB_RX_STREAM_MODE_TAG) {
398 u16 pad_len;
399
400 pad_len = 4 - (pkt_len & 0x3);
401 if (pad_len == 4)
402 pad_len = 0;
403
404 chk_idx = index;
405 index = index + 4 + pkt_len + pad_len;
406
407 if (index > MAX_RX_BUF_SIZE) {
408 spin_lock(&hif_dev->rx_lock);
409 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE;
410 hif_dev->rx_transfer_len =
411 MAX_RX_BUF_SIZE - chk_idx - 4;
412 hif_dev->rx_pad_len = pad_len;
413
414 nskb = __dev_alloc_skb(pkt_len + 32,
415 GFP_ATOMIC);
416 if (!nskb) {
417 dev_err(&hif_dev->udev->dev,
418 "ath9k_htc: RX memory allocation"
419 " error\n");
420 spin_unlock(&hif_dev->rx_lock);
421 goto err;
422 }
423 skb_reserve(nskb, 32);
424 RX_STAT_INC(skb_allocated);
425
426 memcpy(nskb->data, &(skb->data[chk_idx+4]),
427 hif_dev->rx_transfer_len);
428
429 /* Record the buffer pointer */
430 hif_dev->remain_skb = nskb;
431 spin_unlock(&hif_dev->rx_lock);
432 } else {
433 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
434 if (!nskb) {
435 dev_err(&hif_dev->udev->dev,
436 "ath9k_htc: RX memory allocation"
437 " error\n");
438 goto err;
439 }
440 skb_reserve(nskb, 32);
441 RX_STAT_INC(skb_allocated);
442
443 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len);
444 skb_put(nskb, pkt_len);
445 skb_pool[pool_index++] = nskb;
446 }
447 } else {
448 RX_STAT_INC(skb_dropped);
449 return;
450 }
451 }
452
453 err:
454 for (i = 0; i < pool_index; i++) {
455 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i],
456 skb_pool[i]->len, USB_WLAN_RX_PIPE);
457 RX_STAT_INC(skb_completed);
458 }
459 }
460
461 static void ath9k_hif_usb_rx_cb(struct urb *urb)
462 {
463 struct sk_buff *skb = (struct sk_buff *) urb->context;
464 struct hif_device_usb *hif_dev = (struct hif_device_usb *)
465 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
466 int ret;
467
468 if (!skb)
469 return;
470
471 if (!hif_dev)
472 goto free;
473
474 switch (urb->status) {
475 case 0:
476 break;
477 case -ENOENT:
478 case -ECONNRESET:
479 case -ENODEV:
480 case -ESHUTDOWN:
481 goto free;
482 default:
483 goto resubmit;
484 }
485
486 if (likely(urb->actual_length != 0)) {
487 skb_put(skb, urb->actual_length);
488 ath9k_hif_usb_rx_stream(hif_dev, skb);
489 }
490
491 resubmit:
492 skb_reset_tail_pointer(skb);
493 skb_trim(skb, 0);
494
495 usb_anchor_urb(urb, &hif_dev->rx_submitted);
496 ret = usb_submit_urb(urb, GFP_ATOMIC);
497 if (ret) {
498 usb_unanchor_urb(urb);
499 goto free;
500 }
501
502 return;
503 free:
504 kfree_skb(skb);
505 }
506
507 static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
508 {
509 struct sk_buff *skb = (struct sk_buff *) urb->context;
510 struct sk_buff *nskb;
511 struct hif_device_usb *hif_dev = (struct hif_device_usb *)
512 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
513 int ret;
514
515 if (!skb)
516 return;
517
518 if (!hif_dev)
519 goto free;
520
521 switch (urb->status) {
522 case 0:
523 break;
524 case -ENOENT:
525 case -ECONNRESET:
526 case -ENODEV:
527 case -ESHUTDOWN:
528 goto free;
529 default:
530 goto resubmit;
531 }
532
533 if (likely(urb->actual_length != 0)) {
534 skb_put(skb, urb->actual_length);
535
536 /* Process the command first */
537 ath9k_htc_rx_msg(hif_dev->htc_handle, skb,
538 skb->len, USB_REG_IN_PIPE);
539
540
541 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC);
542 if (!nskb) {
543 dev_err(&hif_dev->udev->dev,
544 "ath9k_htc: REG_IN memory allocation failure\n");
545 urb->context = NULL;
546 return;
547 }
548
549 usb_fill_bulk_urb(urb, hif_dev->udev,
550 usb_rcvbulkpipe(hif_dev->udev,
551 USB_REG_IN_PIPE),
552 nskb->data, MAX_REG_IN_BUF_SIZE,
553 ath9k_hif_usb_reg_in_cb, nskb);
554
555 ret = usb_submit_urb(urb, GFP_ATOMIC);
556 if (ret) {
557 kfree_skb(nskb);
558 urb->context = NULL;
559 }
560
561 return;
562 }
563
564 resubmit:
565 skb_reset_tail_pointer(skb);
566 skb_trim(skb, 0);
567
568 ret = usb_submit_urb(urb, GFP_ATOMIC);
569 if (ret)
570 goto free;
571
572 return;
573 free:
574 kfree_skb(skb);
575 urb->context = NULL;
576 }
577
578 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
579 {
580 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
581
582 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
583 &hif_dev->tx.tx_buf, list) {
584 usb_kill_urb(tx_buf->urb);
585 list_del(&tx_buf->list);
586 usb_free_urb(tx_buf->urb);
587 kfree(tx_buf->buf);
588 kfree(tx_buf);
589 }
590
591 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
592 &hif_dev->tx.tx_pending, list) {
593 usb_kill_urb(tx_buf->urb);
594 list_del(&tx_buf->list);
595 usb_free_urb(tx_buf->urb);
596 kfree(tx_buf->buf);
597 kfree(tx_buf);
598 }
599 }
600
601 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev)
602 {
603 struct tx_buf *tx_buf;
604 int i;
605
606 INIT_LIST_HEAD(&hif_dev->tx.tx_buf);
607 INIT_LIST_HEAD(&hif_dev->tx.tx_pending);
608 spin_lock_init(&hif_dev->tx.tx_lock);
609 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue);
610
611 for (i = 0; i < MAX_TX_URB_NUM; i++) {
612 tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL);
613 if (!tx_buf)
614 goto err;
615
616 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL);
617 if (!tx_buf->buf)
618 goto err;
619
620 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL);
621 if (!tx_buf->urb)
622 goto err;
623
624 tx_buf->hif_dev = hif_dev;
625 __skb_queue_head_init(&tx_buf->skb_queue);
626
627 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
628 }
629
630 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM;
631
632 return 0;
633 err:
634 if (tx_buf) {
635 kfree(tx_buf->buf);
636 kfree(tx_buf);
637 }
638 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
639 return -ENOMEM;
640 }
641
642 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev)
643 {
644 usb_kill_anchored_urbs(&hif_dev->rx_submitted);
645 }
646
647 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
648 {
649 struct urb *urb = NULL;
650 struct sk_buff *skb = NULL;
651 int i, ret;
652
653 init_usb_anchor(&hif_dev->rx_submitted);
654 spin_lock_init(&hif_dev->rx_lock);
655
656 for (i = 0; i < MAX_RX_URB_NUM; i++) {
657
658 /* Allocate URB */
659 urb = usb_alloc_urb(0, GFP_KERNEL);
660 if (urb == NULL) {
661 ret = -ENOMEM;
662 goto err_urb;
663 }
664
665 /* Allocate buffer */
666 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL);
667 if (!skb) {
668 ret = -ENOMEM;
669 goto err_skb;
670 }
671
672 usb_fill_bulk_urb(urb, hif_dev->udev,
673 usb_rcvbulkpipe(hif_dev->udev,
674 USB_WLAN_RX_PIPE),
675 skb->data, MAX_RX_BUF_SIZE,
676 ath9k_hif_usb_rx_cb, skb);
677
678 /* Anchor URB */
679 usb_anchor_urb(urb, &hif_dev->rx_submitted);
680
681 /* Submit URB */
682 ret = usb_submit_urb(urb, GFP_KERNEL);
683 if (ret) {
684 usb_unanchor_urb(urb);
685 goto err_submit;
686 }
687
688 /*
689 * Drop reference count.
690 * This ensures that the URB is freed when killing them.
691 */
692 usb_free_urb(urb);
693 }
694
695 return 0;
696
697 err_submit:
698 kfree_skb(skb);
699 err_skb:
700 usb_free_urb(urb);
701 err_urb:
702 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
703 return ret;
704 }
705
706 static void ath9k_hif_usb_dealloc_reg_in_urb(struct hif_device_usb *hif_dev)
707 {
708 if (hif_dev->reg_in_urb) {
709 usb_kill_urb(hif_dev->reg_in_urb);
710 if (hif_dev->reg_in_urb->context)
711 kfree_skb((void *)hif_dev->reg_in_urb->context);
712 usb_free_urb(hif_dev->reg_in_urb);
713 hif_dev->reg_in_urb = NULL;
714 }
715 }
716
717 static int ath9k_hif_usb_alloc_reg_in_urb(struct hif_device_usb *hif_dev)
718 {
719 struct sk_buff *skb;
720
721 hif_dev->reg_in_urb = usb_alloc_urb(0, GFP_KERNEL);
722 if (hif_dev->reg_in_urb == NULL)
723 return -ENOMEM;
724
725 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL);
726 if (!skb)
727 goto err;
728
729 usb_fill_bulk_urb(hif_dev->reg_in_urb, hif_dev->udev,
730 usb_rcvbulkpipe(hif_dev->udev,
731 USB_REG_IN_PIPE),
732 skb->data, MAX_REG_IN_BUF_SIZE,
733 ath9k_hif_usb_reg_in_cb, skb);
734
735 if (usb_submit_urb(hif_dev->reg_in_urb, GFP_KERNEL) != 0)
736 goto err;
737
738 return 0;
739
740 err:
741 ath9k_hif_usb_dealloc_reg_in_urb(hif_dev);
742 return -ENOMEM;
743 }
744
745 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev)
746 {
747 /* Register Write */
748 init_usb_anchor(&hif_dev->regout_submitted);
749
750 /* TX */
751 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0)
752 goto err;
753
754 /* RX */
755 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0)
756 goto err_rx;
757
758 /* Register Read */
759 if (ath9k_hif_usb_alloc_reg_in_urb(hif_dev) < 0)
760 goto err_reg;
761
762 return 0;
763 err_reg:
764 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
765 err_rx:
766 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
767 err:
768 return -ENOMEM;
769 }
770
771 static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev)
772 {
773 usb_kill_anchored_urbs(&hif_dev->regout_submitted);
774 ath9k_hif_usb_dealloc_reg_in_urb(hif_dev);
775 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
776 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
777 }
778
779 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev)
780 {
781 int transfer, err;
782 const void *data = hif_dev->firmware->data;
783 size_t len = hif_dev->firmware->size;
784 u32 addr = AR9271_FIRMWARE;
785 u8 *buf = kzalloc(4096, GFP_KERNEL);
786 u32 firm_offset;
787
788 if (!buf)
789 return -ENOMEM;
790
791 while (len) {
792 transfer = min_t(int, len, 4096);
793 memcpy(buf, data, transfer);
794
795 err = usb_control_msg(hif_dev->udev,
796 usb_sndctrlpipe(hif_dev->udev, 0),
797 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT,
798 addr >> 8, 0, buf, transfer, HZ);
799 if (err < 0) {
800 kfree(buf);
801 return err;
802 }
803
804 len -= transfer;
805 data += transfer;
806 addr += transfer;
807 }
808 kfree(buf);
809
810 switch (hif_dev->device_id) {
811 case 0x7010:
812 case 0x7015:
813 case 0x9018:
814 case 0xA704:
815 case 0x1200:
816 firm_offset = AR7010_FIRMWARE_TEXT;
817 break;
818 default:
819 firm_offset = AR9271_FIRMWARE_TEXT;
820 break;
821 }
822
823 /*
824 * Issue FW download complete command to firmware.
825 */
826 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0),
827 FIRMWARE_DOWNLOAD_COMP,
828 0x40 | USB_DIR_OUT,
829 firm_offset >> 8, 0, NULL, 0, HZ);
830 if (err)
831 return -EIO;
832
833 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n",
834 hif_dev->fw_name, (unsigned long) hif_dev->firmware->size);
835
836 return 0;
837 }
838
839 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev)
840 {
841 int ret, idx;
842 struct usb_host_interface *alt = &hif_dev->interface->altsetting[0];
843 struct usb_endpoint_descriptor *endp;
844
845 /* Request firmware */
846 ret = request_firmware(&hif_dev->firmware, hif_dev->fw_name,
847 &hif_dev->udev->dev);
848 if (ret) {
849 dev_err(&hif_dev->udev->dev,
850 "ath9k_htc: Firmware - %s not found\n", hif_dev->fw_name);
851 goto err_fw_req;
852 }
853
854 /* Download firmware */
855 ret = ath9k_hif_usb_download_fw(hif_dev);
856 if (ret) {
857 dev_err(&hif_dev->udev->dev,
858 "ath9k_htc: Firmware - %s download failed\n",
859 hif_dev->fw_name);
860 goto err_fw_download;
861 }
862
863 /* On downloading the firmware to the target, the USB descriptor of EP4
864 * is 'patched' to change the type of the endpoint to Bulk. This will
865 * bring down CPU usage during the scan period.
866 */
867 for (idx = 0; idx < alt->desc.bNumEndpoints; idx++) {
868 endp = &alt->endpoint[idx].desc;
869 if ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
870 == USB_ENDPOINT_XFER_INT) {
871 endp->bmAttributes &= ~USB_ENDPOINT_XFERTYPE_MASK;
872 endp->bmAttributes |= USB_ENDPOINT_XFER_BULK;
873 endp->bInterval = 0;
874 }
875 }
876
877 /* Alloc URBs */
878 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
879 if (ret) {
880 dev_err(&hif_dev->udev->dev,
881 "ath9k_htc: Unable to allocate URBs\n");
882 goto err_urb;
883 }
884
885 return 0;
886
887 err_fw_download:
888 ath9k_hif_usb_dealloc_urbs(hif_dev);
889 err_urb:
890 release_firmware(hif_dev->firmware);
891 err_fw_req:
892 hif_dev->firmware = NULL;
893 return ret;
894 }
895
896 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev)
897 {
898 ath9k_hif_usb_dealloc_urbs(hif_dev);
899 if (hif_dev->firmware)
900 release_firmware(hif_dev->firmware);
901 }
902
903 static int ath9k_hif_usb_probe(struct usb_interface *interface,
904 const struct usb_device_id *id)
905 {
906 struct usb_device *udev = interface_to_usbdev(interface);
907 struct hif_device_usb *hif_dev;
908 int ret = 0;
909
910 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL);
911 if (!hif_dev) {
912 ret = -ENOMEM;
913 goto err_alloc;
914 }
915
916 usb_get_dev(udev);
917 hif_dev->udev = udev;
918 hif_dev->interface = interface;
919 hif_dev->device_id = id->idProduct;
920 #ifdef CONFIG_PM
921 udev->reset_resume = 1;
922 #endif
923 usb_set_intfdata(interface, hif_dev);
924
925 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb,
926 &hif_dev->udev->dev);
927 if (hif_dev->htc_handle == NULL) {
928 ret = -ENOMEM;
929 goto err_htc_hw_alloc;
930 }
931
932 /* Find out which firmware to load */
933
934 switch(hif_dev->device_id) {
935 case 0x7010:
936 case 0x7015:
937 case 0x9018:
938 case 0xA704:
939 case 0x1200:
940 if (le16_to_cpu(udev->descriptor.bcdDevice) == 0x0202)
941 hif_dev->fw_name = FIRMWARE_AR7010_1_1;
942 else
943 hif_dev->fw_name = FIRMWARE_AR7010;
944 break;
945 default:
946 hif_dev->fw_name = FIRMWARE_AR9271;
947 break;
948 }
949
950 ret = ath9k_hif_usb_dev_init(hif_dev);
951 if (ret) {
952 ret = -EINVAL;
953 goto err_hif_init_usb;
954 }
955
956 ret = ath9k_htc_hw_init(hif_dev->htc_handle,
957 &hif_dev->udev->dev, hif_dev->device_id,
958 hif_dev->udev->product);
959 if (ret) {
960 ret = -EINVAL;
961 goto err_htc_hw_init;
962 }
963
964 dev_info(&hif_dev->udev->dev, "ath9k_htc: USB layer initialized\n");
965
966 return 0;
967
968 err_htc_hw_init:
969 ath9k_hif_usb_dev_deinit(hif_dev);
970 err_hif_init_usb:
971 ath9k_htc_hw_free(hif_dev->htc_handle);
972 err_htc_hw_alloc:
973 usb_set_intfdata(interface, NULL);
974 kfree(hif_dev);
975 usb_put_dev(udev);
976 err_alloc:
977 return ret;
978 }
979
980 static void ath9k_hif_usb_reboot(struct usb_device *udev)
981 {
982 u32 reboot_cmd = 0xffffffff;
983 void *buf;
984 int ret;
985
986 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL);
987 if (!buf)
988 return;
989
990 ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, USB_REG_OUT_PIPE),
991 buf, 4, NULL, HZ);
992 if (ret)
993 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
994
995 kfree(buf);
996 }
997
998 static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
999 {
1000 struct usb_device *udev = interface_to_usbdev(interface);
1001 struct hif_device_usb *hif_dev =
1002 (struct hif_device_usb *) usb_get_intfdata(interface);
1003
1004 if (hif_dev) {
1005 ath9k_htc_hw_deinit(hif_dev->htc_handle,
1006 (udev->state == USB_STATE_NOTATTACHED) ? true : false);
1007 ath9k_htc_hw_free(hif_dev->htc_handle);
1008 ath9k_hif_usb_dev_deinit(hif_dev);
1009 usb_set_intfdata(interface, NULL);
1010 }
1011
1012 if (hif_dev->flags & HIF_USB_START)
1013 ath9k_hif_usb_reboot(udev);
1014
1015 kfree(hif_dev);
1016 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");
1017 usb_put_dev(udev);
1018 }
1019
1020 #ifdef CONFIG_PM
1021 static int ath9k_hif_usb_suspend(struct usb_interface *interface,
1022 pm_message_t message)
1023 {
1024 struct hif_device_usb *hif_dev =
1025 (struct hif_device_usb *) usb_get_intfdata(interface);
1026
1027 /*
1028 * The device has to be set to FULLSLEEP mode in case no
1029 * interface is up.
1030 */
1031 if (!(hif_dev->flags & HIF_USB_START))
1032 ath9k_htc_suspend(hif_dev->htc_handle);
1033
1034 ath9k_hif_usb_dealloc_urbs(hif_dev);
1035
1036 return 0;
1037 }
1038
1039 static int ath9k_hif_usb_resume(struct usb_interface *interface)
1040 {
1041 struct hif_device_usb *hif_dev =
1042 (struct hif_device_usb *) usb_get_intfdata(interface);
1043 int ret;
1044
1045 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1046 if (ret)
1047 return ret;
1048
1049 if (hif_dev->firmware) {
1050 ret = ath9k_hif_usb_download_fw(hif_dev);
1051 if (ret)
1052 goto fail_resume;
1053 } else {
1054 ath9k_hif_usb_dealloc_urbs(hif_dev);
1055 return -EIO;
1056 }
1057
1058 mdelay(100);
1059
1060 ret = ath9k_htc_resume(hif_dev->htc_handle);
1061
1062 if (ret)
1063 goto fail_resume;
1064
1065 return 0;
1066
1067 fail_resume:
1068 ath9k_hif_usb_dealloc_urbs(hif_dev);
1069
1070 return ret;
1071 }
1072 #endif
1073
1074 static struct usb_driver ath9k_hif_usb_driver = {
1075 .name = "ath9k_hif_usb",
1076 .probe = ath9k_hif_usb_probe,
1077 .disconnect = ath9k_hif_usb_disconnect,
1078 #ifdef CONFIG_PM
1079 .suspend = ath9k_hif_usb_suspend,
1080 .resume = ath9k_hif_usb_resume,
1081 .reset_resume = ath9k_hif_usb_resume,
1082 #endif
1083 .id_table = ath9k_hif_usb_ids,
1084 .soft_unbind = 1,
1085 };
1086
1087 int ath9k_hif_usb_init(void)
1088 {
1089 return usb_register(&ath9k_hif_usb_driver);
1090 }
1091
1092 void ath9k_hif_usb_exit(void)
1093 {
1094 usb_deregister(&ath9k_hif_usb_driver);
1095 }
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