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 if (pkt_len > 2 * MAX_RX_BUF_SIZE) {
594 dev_err(&hif_dev->udev->dev,
595 "ath9k_htc: invalid pkt_len (%x)\n", pkt_len);
596 RX_STAT_INC(skb_dropped);
597 return;
598 }
599
600 pad_len = 4 - (pkt_len & 0x3);
601 if (pad_len == 4)
602 pad_len = 0;
603
604 chk_idx = index;
605 index = index + 4 + pkt_len + pad_len;
606
607 if (index > MAX_RX_BUF_SIZE) {
608 spin_lock(&hif_dev->rx_lock);
609 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE;
610 hif_dev->rx_transfer_len =
611 MAX_RX_BUF_SIZE - chk_idx - 4;
612 hif_dev->rx_pad_len = pad_len;
613
614 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
615 if (!nskb) {
616 dev_err(&hif_dev->udev->dev,
617 "ath9k_htc: RX memory allocation error\n");
618 spin_unlock(&hif_dev->rx_lock);
619 goto err;
620 }
621 skb_reserve(nskb, 32);
622 RX_STAT_INC(skb_allocated);
623
624 memcpy(nskb->data, &(skb->data[chk_idx+4]),
625 hif_dev->rx_transfer_len);
626
627 /* Record the buffer pointer */
628 hif_dev->remain_skb = nskb;
629 spin_unlock(&hif_dev->rx_lock);
630 } else {
631 if (pool_index == MAX_PKT_NUM_IN_TRANSFER) {
632 dev_err(&hif_dev->udev->dev,
633 "ath9k_htc: over RX MAX_PKT_NUM\n");
634 goto err;
635 }
636 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
637 if (!nskb) {
638 dev_err(&hif_dev->udev->dev,
639 "ath9k_htc: RX memory allocation error\n");
640 goto err;
641 }
642 skb_reserve(nskb, 32);
643 RX_STAT_INC(skb_allocated);
644
645 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len);
646 skb_put(nskb, pkt_len);
647 skb_pool[pool_index++] = nskb;
648 }
649 }
650
651 err:
652 for (i = 0; i < pool_index; i++) {
653 RX_STAT_ADD(skb_completed_bytes, skb_pool[i]->len);
654 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i],
655 skb_pool[i]->len, USB_WLAN_RX_PIPE);
656 RX_STAT_INC(skb_completed);
657 }
658 }
659
ath9k_hif_usb_rx_cb(struct urb * urb)660 static void ath9k_hif_usb_rx_cb(struct urb *urb)
661 {
662 struct rx_buf *rx_buf = (struct rx_buf *)urb->context;
663 struct hif_device_usb *hif_dev = rx_buf->hif_dev;
664 struct sk_buff *skb = rx_buf->skb;
665 int ret;
666
667 if (!skb)
668 return;
669
670 if (!hif_dev)
671 goto free;
672
673 switch (urb->status) {
674 case 0:
675 break;
676 case -ENOENT:
677 case -ECONNRESET:
678 case -ENODEV:
679 case -ESHUTDOWN:
680 goto free;
681 default:
682 goto resubmit;
683 }
684
685 if (likely(urb->actual_length != 0)) {
686 skb_put(skb, urb->actual_length);
687 ath9k_hif_usb_rx_stream(hif_dev, skb);
688 }
689
690 resubmit:
691 skb_reset_tail_pointer(skb);
692 skb_trim(skb, 0);
693
694 usb_anchor_urb(urb, &hif_dev->rx_submitted);
695 ret = usb_submit_urb(urb, GFP_ATOMIC);
696 if (ret) {
697 usb_unanchor_urb(urb);
698 goto free;
699 }
700
701 return;
702 free:
703 kfree_skb(skb);
704 kfree(rx_buf);
705 }
706
ath9k_hif_usb_reg_in_cb(struct urb * urb)707 static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
708 {
709 struct rx_buf *rx_buf = (struct rx_buf *)urb->context;
710 struct hif_device_usb *hif_dev = rx_buf->hif_dev;
711 struct sk_buff *skb = rx_buf->skb;
712 struct sk_buff *nskb;
713 int ret;
714
715 if (!skb)
716 return;
717
718 if (!hif_dev)
719 goto free;
720
721 switch (urb->status) {
722 case 0:
723 break;
724 case -ENOENT:
725 case -ECONNRESET:
726 case -ENODEV:
727 case -ESHUTDOWN:
728 goto free;
729 default:
730 skb_reset_tail_pointer(skb);
731 skb_trim(skb, 0);
732
733 goto resubmit;
734 }
735
736 if (likely(urb->actual_length != 0)) {
737 skb_put(skb, urb->actual_length);
738
739 /* Process the command first */
740 ath9k_htc_rx_msg(hif_dev->htc_handle, skb,
741 skb->len, USB_REG_IN_PIPE);
742
743
744 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC);
745 if (!nskb) {
746 dev_err(&hif_dev->udev->dev,
747 "ath9k_htc: REG_IN memory allocation failure\n");
748 urb->context = NULL;
749 return;
750 }
751
752 rx_buf->skb = nskb;
753
754 usb_fill_int_urb(urb, hif_dev->udev,
755 usb_rcvintpipe(hif_dev->udev,
756 USB_REG_IN_PIPE),
757 nskb->data, MAX_REG_IN_BUF_SIZE,
758 ath9k_hif_usb_reg_in_cb, rx_buf, 1);
759 }
760
761 resubmit:
762 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
763 ret = usb_submit_urb(urb, GFP_ATOMIC);
764 if (ret) {
765 usb_unanchor_urb(urb);
766 goto free;
767 }
768
769 return;
770 free:
771 kfree_skb(skb);
772 kfree(rx_buf);
773 urb->context = NULL;
774 }
775
ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb * hif_dev)776 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
777 {
778 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
779 unsigned long flags;
780
781 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
782 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
783 &hif_dev->tx.tx_buf, list) {
784 usb_get_urb(tx_buf->urb);
785 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
786 usb_kill_urb(tx_buf->urb);
787 list_del(&tx_buf->list);
788 usb_free_urb(tx_buf->urb);
789 kfree(tx_buf->buf);
790 kfree(tx_buf);
791 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
792 }
793 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
794
795 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
796 hif_dev->tx.flags |= HIF_USB_TX_FLUSH;
797 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
798
799 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
800 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
801 &hif_dev->tx.tx_pending, list) {
802 usb_get_urb(tx_buf->urb);
803 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
804 usb_kill_urb(tx_buf->urb);
805 list_del(&tx_buf->list);
806 usb_free_urb(tx_buf->urb);
807 kfree(tx_buf->buf);
808 kfree(tx_buf);
809 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
810 }
811 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
812
813 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
814 }
815
ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb * hif_dev)816 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev)
817 {
818 struct tx_buf *tx_buf;
819 int i;
820
821 INIT_LIST_HEAD(&hif_dev->tx.tx_buf);
822 INIT_LIST_HEAD(&hif_dev->tx.tx_pending);
823 spin_lock_init(&hif_dev->tx.tx_lock);
824 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue);
825 init_usb_anchor(&hif_dev->mgmt_submitted);
826
827 for (i = 0; i < MAX_TX_URB_NUM; i++) {
828 tx_buf = kzalloc(sizeof(*tx_buf), GFP_KERNEL);
829 if (!tx_buf)
830 goto err;
831
832 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL);
833 if (!tx_buf->buf)
834 goto err;
835
836 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL);
837 if (!tx_buf->urb)
838 goto err;
839
840 tx_buf->hif_dev = hif_dev;
841 __skb_queue_head_init(&tx_buf->skb_queue);
842
843 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
844 }
845
846 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM;
847
848 return 0;
849 err:
850 if (tx_buf) {
851 kfree(tx_buf->buf);
852 kfree(tx_buf);
853 }
854 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
855 return -ENOMEM;
856 }
857
ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb * hif_dev)858 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev)
859 {
860 usb_kill_anchored_urbs(&hif_dev->rx_submitted);
861 }
862
ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb * hif_dev)863 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
864 {
865 struct rx_buf *rx_buf = NULL;
866 struct sk_buff *skb = NULL;
867 struct urb *urb = NULL;
868 int i, ret;
869
870 init_usb_anchor(&hif_dev->rx_submitted);
871 spin_lock_init(&hif_dev->rx_lock);
872
873 for (i = 0; i < MAX_RX_URB_NUM; i++) {
874
875 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL);
876 if (!rx_buf) {
877 ret = -ENOMEM;
878 goto err_rxb;
879 }
880
881 /* Allocate URB */
882 urb = usb_alloc_urb(0, GFP_KERNEL);
883 if (urb == NULL) {
884 ret = -ENOMEM;
885 goto err_urb;
886 }
887
888 /* Allocate buffer */
889 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL);
890 if (!skb) {
891 ret = -ENOMEM;
892 goto err_skb;
893 }
894
895 rx_buf->hif_dev = hif_dev;
896 rx_buf->skb = skb;
897
898 usb_fill_bulk_urb(urb, hif_dev->udev,
899 usb_rcvbulkpipe(hif_dev->udev,
900 USB_WLAN_RX_PIPE),
901 skb->data, MAX_RX_BUF_SIZE,
902 ath9k_hif_usb_rx_cb, rx_buf);
903
904 /* Anchor URB */
905 usb_anchor_urb(urb, &hif_dev->rx_submitted);
906
907 /* Submit URB */
908 ret = usb_submit_urb(urb, GFP_KERNEL);
909 if (ret) {
910 usb_unanchor_urb(urb);
911 goto err_submit;
912 }
913
914 /*
915 * Drop reference count.
916 * This ensures that the URB is freed when killing them.
917 */
918 usb_free_urb(urb);
919 }
920
921 return 0;
922
923 err_submit:
924 kfree_skb(skb);
925 err_skb:
926 usb_free_urb(urb);
927 err_urb:
928 kfree(rx_buf);
929 err_rxb:
930 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
931 return ret;
932 }
933
ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb * hif_dev)934 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev)
935 {
936 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted);
937 }
938
ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb * hif_dev)939 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev)
940 {
941 struct rx_buf *rx_buf = NULL;
942 struct sk_buff *skb = NULL;
943 struct urb *urb = NULL;
944 int i, ret;
945
946 init_usb_anchor(&hif_dev->reg_in_submitted);
947
948 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) {
949
950 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL);
951 if (!rx_buf) {
952 ret = -ENOMEM;
953 goto err_rxb;
954 }
955
956 /* Allocate URB */
957 urb = usb_alloc_urb(0, GFP_KERNEL);
958 if (urb == NULL) {
959 ret = -ENOMEM;
960 goto err_urb;
961 }
962
963 /* Allocate buffer */
964 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL);
965 if (!skb) {
966 ret = -ENOMEM;
967 goto err_skb;
968 }
969
970 rx_buf->hif_dev = hif_dev;
971 rx_buf->skb = skb;
972
973 usb_fill_int_urb(urb, hif_dev->udev,
974 usb_rcvintpipe(hif_dev->udev,
975 USB_REG_IN_PIPE),
976 skb->data, MAX_REG_IN_BUF_SIZE,
977 ath9k_hif_usb_reg_in_cb, rx_buf, 1);
978
979 /* Anchor URB */
980 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
981
982 /* Submit URB */
983 ret = usb_submit_urb(urb, GFP_KERNEL);
984 if (ret) {
985 usb_unanchor_urb(urb);
986 goto err_submit;
987 }
988
989 /*
990 * Drop reference count.
991 * This ensures that the URB is freed when killing them.
992 */
993 usb_free_urb(urb);
994 }
995
996 return 0;
997
998 err_submit:
999 kfree_skb(skb);
1000 err_skb:
1001 usb_free_urb(urb);
1002 err_urb:
1003 kfree(rx_buf);
1004 err_rxb:
1005 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
1006 return ret;
1007 }
1008
ath9k_hif_usb_alloc_urbs(struct hif_device_usb * hif_dev)1009 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev)
1010 {
1011 /* Register Write */
1012 init_usb_anchor(&hif_dev->regout_submitted);
1013
1014 /* TX */
1015 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0)
1016 goto err;
1017
1018 /* RX */
1019 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0)
1020 goto err_rx;
1021
1022 /* Register Read */
1023 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0)
1024 goto err_reg;
1025
1026 return 0;
1027 err_reg:
1028 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
1029 err_rx:
1030 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
1031 err:
1032 return -ENOMEM;
1033 }
1034
ath9k_hif_usb_dealloc_urbs(struct hif_device_usb * hif_dev)1035 void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev)
1036 {
1037 usb_kill_anchored_urbs(&hif_dev->regout_submitted);
1038 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
1039 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
1040 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
1041 }
1042
ath9k_hif_usb_download_fw(struct hif_device_usb * hif_dev)1043 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev)
1044 {
1045 int transfer, err;
1046 const void *data = hif_dev->fw_data;
1047 size_t len = hif_dev->fw_size;
1048 u32 addr = AR9271_FIRMWARE;
1049 u8 *buf = kzalloc(4096, GFP_KERNEL);
1050 u32 firm_offset;
1051
1052 if (!buf)
1053 return -ENOMEM;
1054
1055 while (len) {
1056 transfer = min_t(size_t, len, 4096);
1057 memcpy(buf, data, transfer);
1058
1059 err = usb_control_msg(hif_dev->udev,
1060 usb_sndctrlpipe(hif_dev->udev, 0),
1061 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT,
1062 addr >> 8, 0, buf, transfer,
1063 USB_MSG_TIMEOUT);
1064 if (err < 0) {
1065 kfree(buf);
1066 return err;
1067 }
1068
1069 len -= transfer;
1070 data += transfer;
1071 addr += transfer;
1072 }
1073 kfree(buf);
1074
1075 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1076 firm_offset = AR7010_FIRMWARE_TEXT;
1077 else
1078 firm_offset = AR9271_FIRMWARE_TEXT;
1079
1080 /*
1081 * Issue FW download complete command to firmware.
1082 */
1083 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0),
1084 FIRMWARE_DOWNLOAD_COMP,
1085 0x40 | USB_DIR_OUT,
1086 firm_offset >> 8, 0, NULL, 0, USB_MSG_TIMEOUT);
1087 if (err)
1088 return -EIO;
1089
1090 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n",
1091 hif_dev->fw_name, (unsigned long) hif_dev->fw_size);
1092
1093 return 0;
1094 }
1095
ath9k_hif_usb_dev_init(struct hif_device_usb * hif_dev)1096 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev)
1097 {
1098 int ret;
1099
1100 ret = ath9k_hif_usb_download_fw(hif_dev);
1101 if (ret) {
1102 dev_err(&hif_dev->udev->dev,
1103 "ath9k_htc: Firmware - %s download failed\n",
1104 hif_dev->fw_name);
1105 return ret;
1106 }
1107
1108 /* Alloc URBs */
1109 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1110 if (ret) {
1111 dev_err(&hif_dev->udev->dev,
1112 "ath9k_htc: Unable to allocate URBs\n");
1113 return ret;
1114 }
1115
1116 return 0;
1117 }
1118
ath9k_hif_usb_dev_deinit(struct hif_device_usb * hif_dev)1119 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev)
1120 {
1121 ath9k_hif_usb_dealloc_urbs(hif_dev);
1122 }
1123
1124 /*
1125 * If initialization fails or the FW cannot be retrieved,
1126 * detach the device.
1127 */
ath9k_hif_usb_firmware_fail(struct hif_device_usb * hif_dev)1128 static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev)
1129 {
1130 struct device *dev = &hif_dev->udev->dev;
1131 struct device *parent = dev->parent;
1132
1133 complete_all(&hif_dev->fw_done);
1134
1135 if (parent)
1136 device_lock(parent);
1137
1138 device_release_driver(dev);
1139
1140 if (parent)
1141 device_unlock(parent);
1142 }
1143
1144 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context);
1145
1146 /* taken from iwlwifi */
ath9k_hif_request_firmware(struct hif_device_usb * hif_dev,bool first)1147 static int ath9k_hif_request_firmware(struct hif_device_usb *hif_dev,
1148 bool first)
1149 {
1150 char index[8], *chip;
1151 int ret;
1152
1153 if (first) {
1154 if (htc_use_dev_fw) {
1155 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX + 1;
1156 sprintf(index, "%s", "dev");
1157 } else {
1158 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX;
1159 sprintf(index, "%d", hif_dev->fw_minor_index);
1160 }
1161 } else {
1162 hif_dev->fw_minor_index--;
1163 sprintf(index, "%d", hif_dev->fw_minor_index);
1164 }
1165
1166 /* test for FW 1.3 */
1167 if (MAJOR_VERSION_REQ == 1 && hif_dev->fw_minor_index == 3) {
1168 const char *filename;
1169
1170 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1171 filename = FIRMWARE_AR7010_1_1;
1172 else
1173 filename = FIRMWARE_AR9271;
1174
1175 /* expected fw locations:
1176 * - htc_9271.fw (stable version 1.3, depricated)
1177 */
1178 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name),
1179 "%s", filename);
1180
1181 } else if (hif_dev->fw_minor_index < FIRMWARE_MINOR_IDX_MIN) {
1182 dev_err(&hif_dev->udev->dev, "no suitable firmware found!\n");
1183
1184 return -ENOENT;
1185 } else {
1186 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1187 chip = "7010";
1188 else
1189 chip = "9271";
1190
1191 /* expected fw locations:
1192 * - ath9k_htc/htc_9271-1.dev.0.fw (development version)
1193 * - ath9k_htc/htc_9271-1.4.0.fw (stable version)
1194 */
1195 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name),
1196 "%s/htc_%s-%d.%s.0.fw", HTC_FW_PATH,
1197 chip, MAJOR_VERSION_REQ, index);
1198 }
1199
1200 ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name,
1201 &hif_dev->udev->dev, GFP_KERNEL,
1202 hif_dev, ath9k_hif_usb_firmware_cb);
1203 if (ret) {
1204 dev_err(&hif_dev->udev->dev,
1205 "ath9k_htc: Async request for firmware %s failed\n",
1206 hif_dev->fw_name);
1207 return ret;
1208 }
1209
1210 dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n",
1211 hif_dev->fw_name);
1212
1213 return ret;
1214 }
1215
ath9k_hif_usb_firmware_cb(const struct firmware * fw,void * context)1216 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context)
1217 {
1218 struct hif_device_usb *hif_dev = context;
1219 int ret;
1220
1221 if (!fw) {
1222 ret = ath9k_hif_request_firmware(hif_dev, false);
1223 if (!ret)
1224 return;
1225
1226 dev_err(&hif_dev->udev->dev,
1227 "ath9k_htc: Failed to get firmware %s\n",
1228 hif_dev->fw_name);
1229 goto err_fw;
1230 }
1231
1232 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb,
1233 &hif_dev->udev->dev);
1234 if (hif_dev->htc_handle == NULL)
1235 goto err_dev_alloc;
1236
1237 hif_dev->fw_data = fw->data;
1238 hif_dev->fw_size = fw->size;
1239
1240 /* Proceed with initialization */
1241
1242 ret = ath9k_hif_usb_dev_init(hif_dev);
1243 if (ret)
1244 goto err_dev_init;
1245
1246 ret = ath9k_htc_hw_init(hif_dev->htc_handle,
1247 &hif_dev->interface->dev,
1248 hif_dev->usb_device_id->idProduct,
1249 hif_dev->udev->product,
1250 hif_dev->usb_device_id->driver_info);
1251 if (ret) {
1252 ret = -EINVAL;
1253 goto err_htc_hw_init;
1254 }
1255
1256 release_firmware(fw);
1257 hif_dev->flags |= HIF_USB_READY;
1258 complete_all(&hif_dev->fw_done);
1259
1260 return;
1261
1262 err_htc_hw_init:
1263 ath9k_hif_usb_dev_deinit(hif_dev);
1264 err_dev_init:
1265 ath9k_htc_hw_free(hif_dev->htc_handle);
1266 err_dev_alloc:
1267 release_firmware(fw);
1268 err_fw:
1269 ath9k_hif_usb_firmware_fail(hif_dev);
1270 }
1271
1272 /*
1273 * An exact copy of the function from zd1211rw.
1274 */
send_eject_command(struct usb_interface * interface)1275 static int send_eject_command(struct usb_interface *interface)
1276 {
1277 struct usb_device *udev = interface_to_usbdev(interface);
1278 struct usb_host_interface *iface_desc = interface->cur_altsetting;
1279 struct usb_endpoint_descriptor *endpoint;
1280 unsigned char *cmd;
1281 u8 bulk_out_ep;
1282 int r;
1283
1284 if (iface_desc->desc.bNumEndpoints < 2)
1285 return -ENODEV;
1286
1287 /* Find bulk out endpoint */
1288 for (r = 1; r >= 0; r--) {
1289 endpoint = &iface_desc->endpoint[r].desc;
1290 if (usb_endpoint_dir_out(endpoint) &&
1291 usb_endpoint_xfer_bulk(endpoint)) {
1292 bulk_out_ep = endpoint->bEndpointAddress;
1293 break;
1294 }
1295 }
1296 if (r == -1) {
1297 dev_err(&udev->dev,
1298 "ath9k_htc: Could not find bulk out endpoint\n");
1299 return -ENODEV;
1300 }
1301
1302 cmd = kzalloc(31, GFP_KERNEL);
1303 if (cmd == NULL)
1304 return -ENODEV;
1305
1306 /* USB bulk command block */
1307 cmd[0] = 0x55; /* bulk command signature */
1308 cmd[1] = 0x53; /* bulk command signature */
1309 cmd[2] = 0x42; /* bulk command signature */
1310 cmd[3] = 0x43; /* bulk command signature */
1311 cmd[14] = 6; /* command length */
1312
1313 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
1314 cmd[19] = 0x2; /* eject disc */
1315
1316 dev_info(&udev->dev, "Ejecting storage device...\n");
1317 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
1318 cmd, 31, NULL, 2 * USB_MSG_TIMEOUT);
1319 kfree(cmd);
1320 if (r)
1321 return r;
1322
1323 /* At this point, the device disconnects and reconnects with the real
1324 * ID numbers. */
1325
1326 usb_set_intfdata(interface, NULL);
1327 return 0;
1328 }
1329
ath9k_hif_usb_probe(struct usb_interface * interface,const struct usb_device_id * id)1330 static int ath9k_hif_usb_probe(struct usb_interface *interface,
1331 const struct usb_device_id *id)
1332 {
1333 struct usb_device *udev = interface_to_usbdev(interface);
1334 struct hif_device_usb *hif_dev;
1335 int ret = 0;
1336
1337 if (id->driver_info == STORAGE_DEVICE)
1338 return send_eject_command(interface);
1339
1340 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL);
1341 if (!hif_dev) {
1342 ret = -ENOMEM;
1343 goto err_alloc;
1344 }
1345
1346 usb_get_dev(udev);
1347
1348 hif_dev->udev = udev;
1349 hif_dev->interface = interface;
1350 hif_dev->usb_device_id = id;
1351 #ifdef CONFIG_PM
1352 udev->reset_resume = 1;
1353 #endif
1354 usb_set_intfdata(interface, hif_dev);
1355
1356 init_completion(&hif_dev->fw_done);
1357
1358 ret = ath9k_hif_request_firmware(hif_dev, true);
1359 if (ret)
1360 goto err_fw_req;
1361
1362 return ret;
1363
1364 err_fw_req:
1365 usb_set_intfdata(interface, NULL);
1366 kfree(hif_dev);
1367 usb_put_dev(udev);
1368 err_alloc:
1369 return ret;
1370 }
1371
ath9k_hif_usb_reboot(struct usb_device * udev)1372 static void ath9k_hif_usb_reboot(struct usb_device *udev)
1373 {
1374 u32 reboot_cmd = 0xffffffff;
1375 void *buf;
1376 int ret;
1377
1378 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL);
1379 if (!buf)
1380 return;
1381
1382 ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE),
1383 buf, 4, NULL, USB_MSG_TIMEOUT);
1384 if (ret)
1385 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
1386
1387 kfree(buf);
1388 }
1389
ath9k_hif_usb_disconnect(struct usb_interface * interface)1390 static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
1391 {
1392 struct usb_device *udev = interface_to_usbdev(interface);
1393 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1394 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false;
1395
1396 if (!hif_dev)
1397 return;
1398
1399 wait_for_completion(&hif_dev->fw_done);
1400
1401 if (hif_dev->flags & HIF_USB_READY) {
1402 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged);
1403 ath9k_hif_usb_dev_deinit(hif_dev);
1404 ath9k_destroy_wmi(hif_dev->htc_handle->drv_priv);
1405 ath9k_htc_hw_free(hif_dev->htc_handle);
1406 }
1407
1408 usb_set_intfdata(interface, NULL);
1409
1410 /* If firmware was loaded we should drop it
1411 * go back to first stage bootloader. */
1412 if (!unplugged && (hif_dev->flags & HIF_USB_READY))
1413 ath9k_hif_usb_reboot(udev);
1414
1415 kfree(hif_dev);
1416 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");
1417 usb_put_dev(udev);
1418 }
1419
1420 #ifdef CONFIG_PM
ath9k_hif_usb_suspend(struct usb_interface * interface,pm_message_t message)1421 static int ath9k_hif_usb_suspend(struct usb_interface *interface,
1422 pm_message_t message)
1423 {
1424 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1425
1426 /*
1427 * The device has to be set to FULLSLEEP mode in case no
1428 * interface is up.
1429 */
1430 if (!(hif_dev->flags & HIF_USB_START))
1431 ath9k_htc_suspend(hif_dev->htc_handle);
1432
1433 wait_for_completion(&hif_dev->fw_done);
1434
1435 if (hif_dev->flags & HIF_USB_READY)
1436 ath9k_hif_usb_dealloc_urbs(hif_dev);
1437
1438 return 0;
1439 }
1440
ath9k_hif_usb_resume(struct usb_interface * interface)1441 static int ath9k_hif_usb_resume(struct usb_interface *interface)
1442 {
1443 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1444 struct htc_target *htc_handle = hif_dev->htc_handle;
1445 int ret;
1446 const struct firmware *fw;
1447
1448 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1449 if (ret)
1450 return ret;
1451
1452 if (hif_dev->flags & HIF_USB_READY) {
1453 /* request cached firmware during suspend/resume cycle */
1454 ret = request_firmware(&fw, hif_dev->fw_name,
1455 &hif_dev->udev->dev);
1456 if (ret)
1457 goto fail_resume;
1458
1459 hif_dev->fw_data = fw->data;
1460 hif_dev->fw_size = fw->size;
1461 ret = ath9k_hif_usb_download_fw(hif_dev);
1462 release_firmware(fw);
1463 if (ret)
1464 goto fail_resume;
1465 } else {
1466 ath9k_hif_usb_dealloc_urbs(hif_dev);
1467 return -EIO;
1468 }
1469
1470 mdelay(100);
1471
1472 ret = ath9k_htc_resume(htc_handle);
1473
1474 if (ret)
1475 goto fail_resume;
1476
1477 return 0;
1478
1479 fail_resume:
1480 ath9k_hif_usb_dealloc_urbs(hif_dev);
1481
1482 return ret;
1483 }
1484 #endif
1485
1486 static struct usb_driver ath9k_hif_usb_driver = {
1487 .name = KBUILD_MODNAME,
1488 .probe = ath9k_hif_usb_probe,
1489 .disconnect = ath9k_hif_usb_disconnect,
1490 #ifdef CONFIG_PM
1491 .suspend = ath9k_hif_usb_suspend,
1492 .resume = ath9k_hif_usb_resume,
1493 .reset_resume = ath9k_hif_usb_resume,
1494 #endif
1495 .id_table = ath9k_hif_usb_ids,
1496 .soft_unbind = 1,
1497 .disable_hub_initiated_lpm = 1,
1498 };
1499
ath9k_hif_usb_init(void)1500 int ath9k_hif_usb_init(void)
1501 {
1502 return usb_register(&ath9k_hif_usb_driver);
1503 }
1504
ath9k_hif_usb_exit(void)1505 void ath9k_hif_usb_exit(void)
1506 {
1507 usb_deregister(&ath9k_hif_usb_driver);
1508 }
1509