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