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ath9k_htc: Fix an endian issue
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / ath / ath9k / hif_usb.c
blob1587a82a3709fc1a29340540b4de384350cd747d
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 */
149 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
150
151 /*
152 * If the URBs are being flushed, no need to add this
153 * URB to the free list.
154 */
155 spin_lock(&hif_dev->tx.tx_lock);
156 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) {
157 spin_unlock(&hif_dev->tx.tx_lock);
158 return;
159 }
160 spin_unlock(&hif_dev->tx.tx_lock);
161
162 /*
163 * In the stop() case, this URB has to be added to
164 * the free list.
165 */
166 goto add_free;
167 default:
168 break;
169 }
170
171 /*
172 * Check if TX has been stopped, this is needed because
173 * this CB could have been invoked just after the TX lock
174 * was released in hif_stop() and kill_urb() hasn't been
175 * called yet.
176 */
177 spin_lock(&hif_dev->tx.tx_lock);
178 if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
179 spin_unlock(&hif_dev->tx.tx_lock);
180 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
181 goto add_free;
182 }
183 spin_unlock(&hif_dev->tx.tx_lock);
184
185 /* Complete the queued SKBs. */
186 while ((skb = __skb_dequeue(&tx_buf->skb_queue)) != NULL) {
187 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
188 skb, 1);
189 TX_STAT_INC(skb_completed);
190 }
191
192 add_free:
193 /* Re-initialize the SKB queue */
194 tx_buf->len = tx_buf->offset = 0;
195 __skb_queue_head_init(&tx_buf->skb_queue);
196
197 /* Add this TX buffer to the free list */
198 spin_lock(&hif_dev->tx.tx_lock);
199 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
200 hif_dev->tx.tx_buf_cnt++;
201 if (!(hif_dev->tx.flags & HIF_USB_TX_STOP))
202 __hif_usb_tx(hif_dev); /* Check for pending SKBs */
203 TX_STAT_INC(buf_completed);
204 spin_unlock(&hif_dev->tx.tx_lock);
205 }
206
207 /* TX lock has to be taken */
208 static int __hif_usb_tx(struct hif_device_usb *hif_dev)
209 {
210 struct tx_buf *tx_buf = NULL;
211 struct sk_buff *nskb = NULL;
212 int ret = 0, i;
213 u16 tx_skb_cnt = 0;
214 u8 *buf;
215 __le16 *hdr;
216
217 if (hif_dev->tx.tx_skb_cnt == 0)
218 return 0;
219
220 /* Check if a free TX buffer is available */
221 if (list_empty(&hif_dev->tx.tx_buf))
222 return 0;
223
224 tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list);
225 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending);
226 hif_dev->tx.tx_buf_cnt--;
227
228 tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM);
229
230 for (i = 0; i < tx_skb_cnt; i++) {
231 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue);
232
233 /* Should never be NULL */
234 BUG_ON(!nskb);
235
236 hif_dev->tx.tx_skb_cnt--;
237
238 buf = tx_buf->buf;
239 buf += tx_buf->offset;
240 hdr = (__le16 *)buf;
241 *hdr++ = cpu_to_le16(nskb->len);
242 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG);
243 buf += 4;
244 memcpy(buf, nskb->data, nskb->len);
245 tx_buf->len = nskb->len + 4;
246
247 if (i < (tx_skb_cnt - 1))
248 tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4;
249
250 if (i == (tx_skb_cnt - 1))
251 tx_buf->len += tx_buf->offset;
252
253 __skb_queue_tail(&tx_buf->skb_queue, nskb);
254 TX_STAT_INC(skb_queued);
255 }
256
257 usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev,
258 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
259 tx_buf->buf, tx_buf->len,
260 hif_usb_tx_cb, tx_buf);
261
262 ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC);
263 if (ret) {
264 tx_buf->len = tx_buf->offset = 0;
265 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
266 __skb_queue_head_init(&tx_buf->skb_queue);
267 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
268 hif_dev->tx.tx_buf_cnt++;
269 }
270
271 if (!ret)
272 TX_STAT_INC(buf_queued);
273
274 return ret;
275 }
276
277 static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb,
278 struct ath9k_htc_tx_ctl *tx_ctl)
279 {
280 unsigned long flags;
281
282 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
283
284 if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
285 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
286 return -ENODEV;
287 }
288
289 /* Check if the max queue count has been reached */
290 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) {
291 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
292 return -ENOMEM;
293 }
294
295 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb);
296 hif_dev->tx.tx_skb_cnt++;
297
298 /* Send normal frames immediately */
299 if (!tx_ctl || (tx_ctl && (tx_ctl->type == ATH9K_HTC_NORMAL)))
300 __hif_usb_tx(hif_dev);
301
302 /* Check if AMPDUs have to be sent immediately */
303 if (tx_ctl && (tx_ctl->type == ATH9K_HTC_AMPDU) &&
304 (hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) &&
305 (hif_dev->tx.tx_skb_cnt < 2)) {
306 __hif_usb_tx(hif_dev);
307 }
308
309 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
310
311 return 0;
312 }
313
314 static void hif_usb_start(void *hif_handle, u8 pipe_id)
315 {
316 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
317 unsigned long flags;
318
319 hif_dev->flags |= HIF_USB_START;
320
321 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
322 hif_dev->tx.flags &= ~HIF_USB_TX_STOP;
323 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
324 }
325
326 static void hif_usb_stop(void *hif_handle, u8 pipe_id)
327 {
328 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
329 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
330 unsigned long flags;
331
332 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
333 ath9k_skb_queue_purge(hif_dev, &hif_dev->tx.tx_skb_queue);
334 hif_dev->tx.tx_skb_cnt = 0;
335 hif_dev->tx.flags |= HIF_USB_TX_STOP;
336 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
337
338 /* The pending URBs have to be canceled. */
339 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
340 &hif_dev->tx.tx_pending, list) {
341 usb_kill_urb(tx_buf->urb);
342 }
343 }
344
345 static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb,
346 struct ath9k_htc_tx_ctl *tx_ctl)
347 {
348 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
349 int ret = 0;
350
351 switch (pipe_id) {
352 case USB_WLAN_TX_PIPE:
353 ret = hif_usb_send_tx(hif_dev, skb, tx_ctl);
354 break;
355 case USB_REG_OUT_PIPE:
356 ret = hif_usb_send_regout(hif_dev, skb);
357 break;
358 default:
359 dev_err(&hif_dev->udev->dev,
360 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id);
361 ret = -EINVAL;
362 break;
363 }
364
365 return ret;
366 }
367
368 static struct ath9k_htc_hif hif_usb = {
369 .transport = ATH9K_HIF_USB,
370 .name = "ath9k_hif_usb",
371
372 .control_ul_pipe = USB_REG_OUT_PIPE,
373 .control_dl_pipe = USB_REG_IN_PIPE,
374
375 .start = hif_usb_start,
376 .stop = hif_usb_stop,
377 .send = hif_usb_send,
378 };
379
380 static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev,
381 struct sk_buff *skb)
382 {
383 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER];
384 int index = 0, i = 0, chk_idx, len = skb->len;
385 int rx_remain_len = 0, rx_pkt_len = 0;
386 u16 pkt_len, pkt_tag, pool_index = 0;
387 u8 *ptr;
388
389 spin_lock(&hif_dev->rx_lock);
390
391 rx_remain_len = hif_dev->rx_remain_len;
392 rx_pkt_len = hif_dev->rx_transfer_len;
393
394 if (rx_remain_len != 0) {
395 struct sk_buff *remain_skb = hif_dev->remain_skb;
396
397 if (remain_skb) {
398 ptr = (u8 *) remain_skb->data;
399
400 index = rx_remain_len;
401 rx_remain_len -= hif_dev->rx_pad_len;
402 ptr += rx_pkt_len;
403
404 memcpy(ptr, skb->data, rx_remain_len);
405
406 rx_pkt_len += rx_remain_len;
407 hif_dev->rx_remain_len = 0;
408 skb_put(remain_skb, rx_pkt_len);
409
410 skb_pool[pool_index++] = remain_skb;
411
412 } else {
413 index = rx_remain_len;
414 }
415 }
416
417 spin_unlock(&hif_dev->rx_lock);
418
419 while (index < len) {
420 ptr = (u8 *) skb->data;
421
422 pkt_len = ptr[index] + (ptr[index+1] << 8);
423 pkt_tag = ptr[index+2] + (ptr[index+3] << 8);
424
425 if (pkt_tag == ATH_USB_RX_STREAM_MODE_TAG) {
426 u16 pad_len;
427
428 pad_len = 4 - (pkt_len & 0x3);
429 if (pad_len == 4)
430 pad_len = 0;
431
432 chk_idx = index;
433 index = index + 4 + pkt_len + pad_len;
434
435 if (index > MAX_RX_BUF_SIZE) {
436 spin_lock(&hif_dev->rx_lock);
437 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE;
438 hif_dev->rx_transfer_len =
439 MAX_RX_BUF_SIZE - chk_idx - 4;
440 hif_dev->rx_pad_len = pad_len;
441
442 nskb = __dev_alloc_skb(pkt_len + 32,
443 GFP_ATOMIC);
444 if (!nskb) {
445 dev_err(&hif_dev->udev->dev,
446 "ath9k_htc: RX memory allocation"
447 " error\n");
448 spin_unlock(&hif_dev->rx_lock);
449 goto err;
450 }
451 skb_reserve(nskb, 32);
452 RX_STAT_INC(skb_allocated);
453
454 memcpy(nskb->data, &(skb->data[chk_idx+4]),
455 hif_dev->rx_transfer_len);
456
457 /* Record the buffer pointer */
458 hif_dev->remain_skb = nskb;
459 spin_unlock(&hif_dev->rx_lock);
460 } else {
461 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
462 if (!nskb) {
463 dev_err(&hif_dev->udev->dev,
464 "ath9k_htc: RX memory allocation"
465 " error\n");
466 goto err;
467 }
468 skb_reserve(nskb, 32);
469 RX_STAT_INC(skb_allocated);
470
471 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len);
472 skb_put(nskb, pkt_len);
473 skb_pool[pool_index++] = nskb;
474 }
475 } else {
476 RX_STAT_INC(skb_dropped);
477 return;
478 }
479 }
480
481 err:
482 for (i = 0; i < pool_index; i++) {
483 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i],
484 skb_pool[i]->len, USB_WLAN_RX_PIPE);
485 RX_STAT_INC(skb_completed);
486 }
487 }
488
489 static void ath9k_hif_usb_rx_cb(struct urb *urb)
490 {
491 struct sk_buff *skb = (struct sk_buff *) urb->context;
492 struct hif_device_usb *hif_dev = (struct hif_device_usb *)
493 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
494 int ret;
495
496 if (!skb)
497 return;
498
499 if (!hif_dev)
500 goto free;
501
502 switch (urb->status) {
503 case 0:
504 break;
505 case -ENOENT:
506 case -ECONNRESET:
507 case -ENODEV:
508 case -ESHUTDOWN:
509 goto free;
510 default:
511 goto resubmit;
512 }
513
514 if (likely(urb->actual_length != 0)) {
515 skb_put(skb, urb->actual_length);
516 ath9k_hif_usb_rx_stream(hif_dev, skb);
517 }
518
519 resubmit:
520 skb_reset_tail_pointer(skb);
521 skb_trim(skb, 0);
522
523 usb_anchor_urb(urb, &hif_dev->rx_submitted);
524 ret = usb_submit_urb(urb, GFP_ATOMIC);
525 if (ret) {
526 usb_unanchor_urb(urb);
527 goto free;
528 }
529
530 return;
531 free:
532 kfree_skb(skb);
533 }
534
535 static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
536 {
537 struct sk_buff *skb = (struct sk_buff *) urb->context;
538 struct sk_buff *nskb;
539 struct hif_device_usb *hif_dev = (struct hif_device_usb *)
540 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
541 int ret;
542
543 if (!skb)
544 return;
545
546 if (!hif_dev)
547 goto free;
548
549 switch (urb->status) {
550 case 0:
551 break;
552 case -ENOENT:
553 case -ECONNRESET:
554 case -ENODEV:
555 case -ESHUTDOWN:
556 goto free;
557 default:
558 goto resubmit;
559 }
560
561 if (likely(urb->actual_length != 0)) {
562 skb_put(skb, urb->actual_length);
563
564 /* Process the command first */
565 ath9k_htc_rx_msg(hif_dev->htc_handle, skb,
566 skb->len, USB_REG_IN_PIPE);
567
568
569 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC);
570 if (!nskb) {
571 dev_err(&hif_dev->udev->dev,
572 "ath9k_htc: REG_IN memory allocation failure\n");
573 urb->context = NULL;
574 return;
575 }
576
577 usb_fill_bulk_urb(urb, hif_dev->udev,
578 usb_rcvbulkpipe(hif_dev->udev,
579 USB_REG_IN_PIPE),
580 nskb->data, MAX_REG_IN_BUF_SIZE,
581 ath9k_hif_usb_reg_in_cb, nskb);
582
583 ret = usb_submit_urb(urb, GFP_ATOMIC);
584 if (ret) {
585 kfree_skb(nskb);
586 urb->context = NULL;
587 }
588
589 return;
590 }
591
592 resubmit:
593 skb_reset_tail_pointer(skb);
594 skb_trim(skb, 0);
595
596 ret = usb_submit_urb(urb, GFP_ATOMIC);
597 if (ret)
598 goto free;
599
600 return;
601 free:
602 kfree_skb(skb);
603 urb->context = NULL;
604 }
605
606 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
607 {
608 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
609 unsigned long flags;
610
611 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
612 &hif_dev->tx.tx_buf, list) {
613 usb_kill_urb(tx_buf->urb);
614 list_del(&tx_buf->list);
615 usb_free_urb(tx_buf->urb);
616 kfree(tx_buf->buf);
617 kfree(tx_buf);
618 }
619
620 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
621 hif_dev->tx.flags |= HIF_USB_TX_FLUSH;
622 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
623
624 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
625 &hif_dev->tx.tx_pending, list) {
626 usb_kill_urb(tx_buf->urb);
627 list_del(&tx_buf->list);
628 usb_free_urb(tx_buf->urb);
629 kfree(tx_buf->buf);
630 kfree(tx_buf);
631 }
632 }
633
634 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev)
635 {
636 struct tx_buf *tx_buf;
637 int i;
638
639 INIT_LIST_HEAD(&hif_dev->tx.tx_buf);
640 INIT_LIST_HEAD(&hif_dev->tx.tx_pending);
641 spin_lock_init(&hif_dev->tx.tx_lock);
642 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue);
643
644 for (i = 0; i < MAX_TX_URB_NUM; i++) {
645 tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL);
646 if (!tx_buf)
647 goto err;
648
649 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL);
650 if (!tx_buf->buf)
651 goto err;
652
653 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL);
654 if (!tx_buf->urb)
655 goto err;
656
657 tx_buf->hif_dev = hif_dev;
658 __skb_queue_head_init(&tx_buf->skb_queue);
659
660 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
661 }
662
663 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM;
664
665 return 0;
666 err:
667 if (tx_buf) {
668 kfree(tx_buf->buf);
669 kfree(tx_buf);
670 }
671 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
672 return -ENOMEM;
673 }
674
675 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev)
676 {
677 usb_kill_anchored_urbs(&hif_dev->rx_submitted);
678 }
679
680 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
681 {
682 struct urb *urb = NULL;
683 struct sk_buff *skb = NULL;
684 int i, ret;
685
686 init_usb_anchor(&hif_dev->rx_submitted);
687 spin_lock_init(&hif_dev->rx_lock);
688
689 for (i = 0; i < MAX_RX_URB_NUM; i++) {
690
691 /* Allocate URB */
692 urb = usb_alloc_urb(0, GFP_KERNEL);
693 if (urb == NULL) {
694 ret = -ENOMEM;
695 goto err_urb;
696 }
697
698 /* Allocate buffer */
699 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL);
700 if (!skb) {
701 ret = -ENOMEM;
702 goto err_skb;
703 }
704
705 usb_fill_bulk_urb(urb, hif_dev->udev,
706 usb_rcvbulkpipe(hif_dev->udev,
707 USB_WLAN_RX_PIPE),
708 skb->data, MAX_RX_BUF_SIZE,
709 ath9k_hif_usb_rx_cb, skb);
710
711 /* Anchor URB */
712 usb_anchor_urb(urb, &hif_dev->rx_submitted);
713
714 /* Submit URB */
715 ret = usb_submit_urb(urb, GFP_KERNEL);
716 if (ret) {
717 usb_unanchor_urb(urb);
718 goto err_submit;
719 }
720
721 /*
722 * Drop reference count.
723 * This ensures that the URB is freed when killing them.
724 */
725 usb_free_urb(urb);
726 }
727
728 return 0;
729
730 err_submit:
731 kfree_skb(skb);
732 err_skb:
733 usb_free_urb(urb);
734 err_urb:
735 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
736 return ret;
737 }
738
739 static void ath9k_hif_usb_dealloc_reg_in_urb(struct hif_device_usb *hif_dev)
740 {
741 if (hif_dev->reg_in_urb) {
742 usb_kill_urb(hif_dev->reg_in_urb);
743 if (hif_dev->reg_in_urb->context)
744 kfree_skb((void *)hif_dev->reg_in_urb->context);
745 usb_free_urb(hif_dev->reg_in_urb);
746 hif_dev->reg_in_urb = NULL;
747 }
748 }
749
750 static int ath9k_hif_usb_alloc_reg_in_urb(struct hif_device_usb *hif_dev)
751 {
752 struct sk_buff *skb;
753
754 hif_dev->reg_in_urb = usb_alloc_urb(0, GFP_KERNEL);
755 if (hif_dev->reg_in_urb == NULL)
756 return -ENOMEM;
757
758 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL);
759 if (!skb)
760 goto err;
761
762 usb_fill_bulk_urb(hif_dev->reg_in_urb, hif_dev->udev,
763 usb_rcvbulkpipe(hif_dev->udev,
764 USB_REG_IN_PIPE),
765 skb->data, MAX_REG_IN_BUF_SIZE,
766 ath9k_hif_usb_reg_in_cb, skb);
767
768 if (usb_submit_urb(hif_dev->reg_in_urb, GFP_KERNEL) != 0)
769 goto err;
770
771 return 0;
772
773 err:
774 ath9k_hif_usb_dealloc_reg_in_urb(hif_dev);
775 return -ENOMEM;
776 }
777
778 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev)
779 {
780 /* Register Write */
781 init_usb_anchor(&hif_dev->regout_submitted);
782
783 /* TX */
784 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0)
785 goto err;
786
787 /* RX */
788 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0)
789 goto err_rx;
790
791 /* Register Read */
792 if (ath9k_hif_usb_alloc_reg_in_urb(hif_dev) < 0)
793 goto err_reg;
794
795 return 0;
796 err_reg:
797 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
798 err_rx:
799 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
800 err:
801 return -ENOMEM;
802 }
803
804 static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev)
805 {
806 usb_kill_anchored_urbs(&hif_dev->regout_submitted);
807 ath9k_hif_usb_dealloc_reg_in_urb(hif_dev);
808 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
809 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
810 }
811
812 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev)
813 {
814 int transfer, err;
815 const void *data = hif_dev->firmware->data;
816 size_t len = hif_dev->firmware->size;
817 u32 addr = AR9271_FIRMWARE;
818 u8 *buf = kzalloc(4096, GFP_KERNEL);
819 u32 firm_offset;
820
821 if (!buf)
822 return -ENOMEM;
823
824 while (len) {
825 transfer = min_t(int, len, 4096);
826 memcpy(buf, data, transfer);
827
828 err = usb_control_msg(hif_dev->udev,
829 usb_sndctrlpipe(hif_dev->udev, 0),
830 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT,
831 addr >> 8, 0, buf, transfer, HZ);
832 if (err < 0) {
833 kfree(buf);
834 return err;
835 }
836
837 len -= transfer;
838 data += transfer;
839 addr += transfer;
840 }
841 kfree(buf);
842
843 switch (hif_dev->device_id) {
844 case 0x7010:
845 case 0x7015:
846 case 0x9018:
847 case 0xA704:
848 case 0x1200:
849 firm_offset = AR7010_FIRMWARE_TEXT;
850 break;
851 default:
852 firm_offset = AR9271_FIRMWARE_TEXT;
853 break;
854 }
855
856 /*
857 * Issue FW download complete command to firmware.
858 */
859 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0),
860 FIRMWARE_DOWNLOAD_COMP,
861 0x40 | USB_DIR_OUT,
862 firm_offset >> 8, 0, NULL, 0, HZ);
863 if (err)
864 return -EIO;
865
866 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n",
867 hif_dev->fw_name, (unsigned long) hif_dev->firmware->size);
868
869 return 0;
870 }
871
872 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev)
873 {
874 int ret, idx;
875 struct usb_host_interface *alt = &hif_dev->interface->altsetting[0];
876 struct usb_endpoint_descriptor *endp;
877
878 /* Request firmware */
879 ret = request_firmware(&hif_dev->firmware, hif_dev->fw_name,
880 &hif_dev->udev->dev);
881 if (ret) {
882 dev_err(&hif_dev->udev->dev,
883 "ath9k_htc: Firmware - %s not found\n", hif_dev->fw_name);
884 goto err_fw_req;
885 }
886
887 /* Download firmware */
888 ret = ath9k_hif_usb_download_fw(hif_dev);
889 if (ret) {
890 dev_err(&hif_dev->udev->dev,
891 "ath9k_htc: Firmware - %s download failed\n",
892 hif_dev->fw_name);
893 goto err_fw_download;
894 }
895
896 /* On downloading the firmware to the target, the USB descriptor of EP4
897 * is 'patched' to change the type of the endpoint to Bulk. This will
898 * bring down CPU usage during the scan period.
899 */
900 for (idx = 0; idx < alt->desc.bNumEndpoints; idx++) {
901 endp = &alt->endpoint[idx].desc;
902 if ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
903 == USB_ENDPOINT_XFER_INT) {
904 endp->bmAttributes &= ~USB_ENDPOINT_XFERTYPE_MASK;
905 endp->bmAttributes |= USB_ENDPOINT_XFER_BULK;
906 endp->bInterval = 0;
907 }
908 }
909
910 /* Alloc URBs */
911 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
912 if (ret) {
913 dev_err(&hif_dev->udev->dev,
914 "ath9k_htc: Unable to allocate URBs\n");
915 goto err_urb;
916 }
917
918 return 0;
919
920 err_fw_download:
921 ath9k_hif_usb_dealloc_urbs(hif_dev);
922 err_urb:
923 release_firmware(hif_dev->firmware);
924 err_fw_req:
925 hif_dev->firmware = NULL;
926 return ret;
927 }
928
929 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev)
930 {
931 ath9k_hif_usb_dealloc_urbs(hif_dev);
932 if (hif_dev->firmware)
933 release_firmware(hif_dev->firmware);
934 }
935
936 static int ath9k_hif_usb_probe(struct usb_interface *interface,
937 const struct usb_device_id *id)
938 {
939 struct usb_device *udev = interface_to_usbdev(interface);
940 struct hif_device_usb *hif_dev;
941 int ret = 0;
942
943 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL);
944 if (!hif_dev) {
945 ret = -ENOMEM;
946 goto err_alloc;
947 }
948
949 usb_get_dev(udev);
950 hif_dev->udev = udev;
951 hif_dev->interface = interface;
952 hif_dev->device_id = id->idProduct;
953 #ifdef CONFIG_PM
954 udev->reset_resume = 1;
955 #endif
956 usb_set_intfdata(interface, hif_dev);
957
958 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb,
959 &hif_dev->udev->dev);
960 if (hif_dev->htc_handle == NULL) {
961 ret = -ENOMEM;
962 goto err_htc_hw_alloc;
963 }
964
965 /* Find out which firmware to load */
966
967 switch(hif_dev->device_id) {
968 case 0x7010:
969 case 0x7015:
970 case 0x9018:
971 case 0xA704:
972 case 0x1200:
973 if (le16_to_cpu(udev->descriptor.bcdDevice) == 0x0202)
974 hif_dev->fw_name = FIRMWARE_AR7010_1_1;
975 else
976 hif_dev->fw_name = FIRMWARE_AR7010;
977 break;
978 default:
979 hif_dev->fw_name = FIRMWARE_AR9271;
980 break;
981 }
982
983 ret = ath9k_hif_usb_dev_init(hif_dev);
984 if (ret) {
985 ret = -EINVAL;
986 goto err_hif_init_usb;
987 }
988
989 ret = ath9k_htc_hw_init(hif_dev->htc_handle,
990 &hif_dev->udev->dev, hif_dev->device_id,
991 hif_dev->udev->product);
992 if (ret) {
993 ret = -EINVAL;
994 goto err_htc_hw_init;
995 }
996
997 dev_info(&hif_dev->udev->dev, "ath9k_htc: USB layer initialized\n");
998
999 return 0;
1000
1001 err_htc_hw_init:
1002 ath9k_hif_usb_dev_deinit(hif_dev);
1003 err_hif_init_usb:
1004 ath9k_htc_hw_free(hif_dev->htc_handle);
1005 err_htc_hw_alloc:
1006 usb_set_intfdata(interface, NULL);
1007 kfree(hif_dev);
1008 usb_put_dev(udev);
1009 err_alloc:
1010 return ret;
1011 }
1012
1013 static void ath9k_hif_usb_reboot(struct usb_device *udev)
1014 {
1015 u32 reboot_cmd = 0xffffffff;
1016 void *buf;
1017 int ret;
1018
1019 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL);
1020 if (!buf)
1021 return;
1022
1023 ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, USB_REG_OUT_PIPE),
1024 buf, 4, NULL, HZ);
1025 if (ret)
1026 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
1027
1028 kfree(buf);
1029 }
1030
1031 static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
1032 {
1033 struct usb_device *udev = interface_to_usbdev(interface);
1034 struct hif_device_usb *hif_dev =
1035 (struct hif_device_usb *) usb_get_intfdata(interface);
1036
1037 if (hif_dev) {
1038 ath9k_htc_hw_deinit(hif_dev->htc_handle,
1039 (udev->state == USB_STATE_NOTATTACHED) ? true : false);
1040 ath9k_htc_hw_free(hif_dev->htc_handle);
1041 ath9k_hif_usb_dev_deinit(hif_dev);
1042 usb_set_intfdata(interface, NULL);
1043 }
1044
1045 if (hif_dev->flags & HIF_USB_START)
1046 ath9k_hif_usb_reboot(udev);
1047
1048 kfree(hif_dev);
1049 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");
1050 usb_put_dev(udev);
1051 }
1052
1053 #ifdef CONFIG_PM
1054 static int ath9k_hif_usb_suspend(struct usb_interface *interface,
1055 pm_message_t message)
1056 {
1057 struct hif_device_usb *hif_dev =
1058 (struct hif_device_usb *) usb_get_intfdata(interface);
1059
1060 /*
1061 * The device has to be set to FULLSLEEP mode in case no
1062 * interface is up.
1063 */
1064 if (!(hif_dev->flags & HIF_USB_START))
1065 ath9k_htc_suspend(hif_dev->htc_handle);
1066
1067 ath9k_hif_usb_dealloc_urbs(hif_dev);
1068
1069 return 0;
1070 }
1071
1072 static int ath9k_hif_usb_resume(struct usb_interface *interface)
1073 {
1074 struct hif_device_usb *hif_dev =
1075 (struct hif_device_usb *) usb_get_intfdata(interface);
1076 int ret;
1077
1078 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1079 if (ret)
1080 return ret;
1081
1082 if (hif_dev->firmware) {
1083 ret = ath9k_hif_usb_download_fw(hif_dev);
1084 if (ret)
1085 goto fail_resume;
1086 } else {
1087 ath9k_hif_usb_dealloc_urbs(hif_dev);
1088 return -EIO;
1089 }
1090
1091 mdelay(100);
1092
1093 ret = ath9k_htc_resume(hif_dev->htc_handle);
1094
1095 if (ret)
1096 goto fail_resume;
1097
1098 return 0;
1099
1100 fail_resume:
1101 ath9k_hif_usb_dealloc_urbs(hif_dev);
1102
1103 return ret;
1104 }
1105 #endif
1106
1107 static struct usb_driver ath9k_hif_usb_driver = {
1108 .name = "ath9k_hif_usb",
1109 .probe = ath9k_hif_usb_probe,
1110 .disconnect = ath9k_hif_usb_disconnect,
1111 #ifdef CONFIG_PM
1112 .suspend = ath9k_hif_usb_suspend,
1113 .resume = ath9k_hif_usb_resume,
1114 .reset_resume = ath9k_hif_usb_resume,
1115 #endif
1116 .id_table = ath9k_hif_usb_ids,
1117 .soft_unbind = 1,
1118 };
1119
1120 int ath9k_hif_usb_init(void)
1121 {
1122 return usb_register(&ath9k_hif_usb_driver);
1123 }
1124
1125 void ath9k_hif_usb_exit(void)
1126 {
1127 usb_deregister(&ath9k_hif_usb_driver);
1128 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree