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 } else {
372 TX_STAT_INC(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(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 hif_dev->rx_remain_len = 0;
565 skb_put(remain_skb, rx_pkt_len);
566
567 skb_pool[pool_index++] = remain_skb;
568
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 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) {
588 RX_STAT_INC(skb_dropped);
589 return;
590 }
591
592 if (pkt_len > 2 * MAX_RX_BUF_SIZE) {
593 dev_err(&hif_dev->udev->dev,
594 "ath9k_htc: invalid pkt_len (%x)\n", pkt_len);
595 RX_STAT_INC(skb_dropped);
596 return;
597 }
598
599 pad_len = 4 - (pkt_len & 0x3);
600 if (pad_len == 4)
601 pad_len = 0;
602
603 chk_idx = index;
604 index = index + 4 + pkt_len + pad_len;
605
606 if (index > MAX_RX_BUF_SIZE) {
607 spin_lock(&hif_dev->rx_lock);
608 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE;
609 hif_dev->rx_transfer_len =
610 MAX_RX_BUF_SIZE - chk_idx - 4;
611 hif_dev->rx_pad_len = pad_len;
612
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 skb_reserve(nskb, 32);
621 RX_STAT_INC(skb_allocated);
622
623 memcpy(nskb->data, &(skb->data[chk_idx+4]),
624 hif_dev->rx_transfer_len);
625
626 /* Record the buffer pointer */
627 hif_dev->remain_skb = nskb;
628 spin_unlock(&hif_dev->rx_lock);
629 } else {
630 if (pool_index == MAX_PKT_NUM_IN_TRANSFER) {
631 dev_err(&hif_dev->udev->dev,
632 "ath9k_htc: over RX MAX_PKT_NUM\n");
633 goto err;
634 }
635 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
636 if (!nskb) {
637 dev_err(&hif_dev->udev->dev,
638 "ath9k_htc: RX memory allocation error\n");
639 goto err;
640 }
641 skb_reserve(nskb, 32);
642 RX_STAT_INC(skb_allocated);
643
644 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len);
645 skb_put(nskb, pkt_len);
646 skb_pool[pool_index++] = nskb;
647 }
648 }
649
650 err:
651 for (i = 0; i < pool_index; i++) {
652 RX_STAT_ADD(skb_completed_bytes, skb_pool[i]->len);
653 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i],
654 skb_pool[i]->len, USB_WLAN_RX_PIPE);
655 RX_STAT_INC(skb_completed);
656 }
657 }
658
ath9k_hif_usb_rx_cb(struct urb * urb)659 static void ath9k_hif_usb_rx_cb(struct urb *urb)
660 {
661 struct rx_buf *rx_buf = (struct rx_buf *)urb->context;
662 struct hif_device_usb *hif_dev = rx_buf->hif_dev;
663 struct sk_buff *skb = rx_buf->skb;
664 int ret;
665
666 if (!skb)
667 return;
668
669 if (!hif_dev)
670 goto free;
671
672 switch (urb->status) {
673 case 0:
674 break;
675 case -ENOENT:
676 case -ECONNRESET:
677 case -ENODEV:
678 case -ESHUTDOWN:
679 goto free;
680 default:
681 goto resubmit;
682 }
683
684 if (likely(urb->actual_length != 0)) {
685 skb_put(skb, urb->actual_length);
686 ath9k_hif_usb_rx_stream(hif_dev, skb);
687 }
688
689 resubmit:
690 skb_reset_tail_pointer(skb);
691 skb_trim(skb, 0);
692
693 usb_anchor_urb(urb, &hif_dev->rx_submitted);
694 ret = usb_submit_urb(urb, GFP_ATOMIC);
695 if (ret) {
696 usb_unanchor_urb(urb);
697 goto free;
698 }
699
700 return;
701 free:
702 kfree_skb(skb);
703 kfree(rx_buf);
704 }
705
ath9k_hif_usb_reg_in_cb(struct urb * urb)706 static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
707 {
708 struct rx_buf *rx_buf = (struct rx_buf *)urb->context;
709 struct hif_device_usb *hif_dev = rx_buf->hif_dev;
710 struct sk_buff *skb = rx_buf->skb;
711 struct sk_buff *nskb;
712 int ret;
713
714 if (!skb)
715 return;
716
717 if (!hif_dev)
718 goto free;
719
720 switch (urb->status) {
721 case 0:
722 break;
723 case -ENOENT:
724 case -ECONNRESET:
725 case -ENODEV:
726 case -ESHUTDOWN:
727 goto free;
728 default:
729 skb_reset_tail_pointer(skb);
730 skb_trim(skb, 0);
731
732 goto resubmit;
733 }
734
735 if (likely(urb->actual_length != 0)) {
736 skb_put(skb, urb->actual_length);
737
738 /* Process the command first */
739 ath9k_htc_rx_msg(hif_dev->htc_handle, skb,
740 skb->len, USB_REG_IN_PIPE);
741
742
743 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC);
744 if (!nskb) {
745 dev_err(&hif_dev->udev->dev,
746 "ath9k_htc: REG_IN memory allocation failure\n");
747 urb->context = NULL;
748 return;
749 }
750
751 rx_buf->skb = nskb;
752
753 usb_fill_int_urb(urb, hif_dev->udev,
754 usb_rcvintpipe(hif_dev->udev,
755 USB_REG_IN_PIPE),
756 nskb->data, MAX_REG_IN_BUF_SIZE,
757 ath9k_hif_usb_reg_in_cb, rx_buf, 1);
758 }
759
760 resubmit:
761 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
762 ret = usb_submit_urb(urb, GFP_ATOMIC);
763 if (ret) {
764 usb_unanchor_urb(urb);
765 goto free;
766 }
767
768 return;
769 free:
770 kfree_skb(skb);
771 kfree(rx_buf);
772 urb->context = NULL;
773 }
774
ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb * hif_dev)775 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
776 {
777 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
778 unsigned long flags;
779
780 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
781 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
782 &hif_dev->tx.tx_buf, list) {
783 usb_get_urb(tx_buf->urb);
784 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
785 usb_kill_urb(tx_buf->urb);
786 list_del(&tx_buf->list);
787 usb_free_urb(tx_buf->urb);
788 kfree(tx_buf->buf);
789 kfree(tx_buf);
790 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
791 }
792 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
793
794 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
795 hif_dev->tx.flags |= HIF_USB_TX_FLUSH;
796 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
797
798 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
799 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
800 &hif_dev->tx.tx_pending, list) {
801 usb_get_urb(tx_buf->urb);
802 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
803 usb_kill_urb(tx_buf->urb);
804 list_del(&tx_buf->list);
805 usb_free_urb(tx_buf->urb);
806 kfree(tx_buf->buf);
807 kfree(tx_buf);
808 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
809 }
810 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
811
812 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
813 }
814
ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb * hif_dev)815 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev)
816 {
817 struct tx_buf *tx_buf;
818 int i;
819
820 INIT_LIST_HEAD(&hif_dev->tx.tx_buf);
821 INIT_LIST_HEAD(&hif_dev->tx.tx_pending);
822 spin_lock_init(&hif_dev->tx.tx_lock);
823 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue);
824 init_usb_anchor(&hif_dev->mgmt_submitted);
825
826 for (i = 0; i < MAX_TX_URB_NUM; i++) {
827 tx_buf = kzalloc(sizeof(*tx_buf), GFP_KERNEL);
828 if (!tx_buf)
829 goto err;
830
831 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL);
832 if (!tx_buf->buf)
833 goto err;
834
835 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL);
836 if (!tx_buf->urb)
837 goto err;
838
839 tx_buf->hif_dev = hif_dev;
840 __skb_queue_head_init(&tx_buf->skb_queue);
841
842 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
843 }
844
845 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM;
846
847 return 0;
848 err:
849 if (tx_buf) {
850 kfree(tx_buf->buf);
851 kfree(tx_buf);
852 }
853 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
854 return -ENOMEM;
855 }
856
ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb * hif_dev)857 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev)
858 {
859 usb_kill_anchored_urbs(&hif_dev->rx_submitted);
860 }
861
ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb * hif_dev)862 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
863 {
864 struct rx_buf *rx_buf = NULL;
865 struct sk_buff *skb = NULL;
866 struct urb *urb = NULL;
867 int i, ret;
868
869 init_usb_anchor(&hif_dev->rx_submitted);
870 spin_lock_init(&hif_dev->rx_lock);
871
872 for (i = 0; i < MAX_RX_URB_NUM; i++) {
873
874 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL);
875 if (!rx_buf) {
876 ret = -ENOMEM;
877 goto err_rxb;
878 }
879
880 /* Allocate URB */
881 urb = usb_alloc_urb(0, GFP_KERNEL);
882 if (urb == NULL) {
883 ret = -ENOMEM;
884 goto err_urb;
885 }
886
887 /* Allocate buffer */
888 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL);
889 if (!skb) {
890 ret = -ENOMEM;
891 goto err_skb;
892 }
893
894 rx_buf->hif_dev = hif_dev;
895 rx_buf->skb = skb;
896
897 usb_fill_bulk_urb(urb, hif_dev->udev,
898 usb_rcvbulkpipe(hif_dev->udev,
899 USB_WLAN_RX_PIPE),
900 skb->data, MAX_RX_BUF_SIZE,
901 ath9k_hif_usb_rx_cb, rx_buf);
902
903 /* Anchor URB */
904 usb_anchor_urb(urb, &hif_dev->rx_submitted);
905
906 /* Submit URB */
907 ret = usb_submit_urb(urb, GFP_KERNEL);
908 if (ret) {
909 usb_unanchor_urb(urb);
910 goto err_submit;
911 }
912
913 /*
914 * Drop reference count.
915 * This ensures that the URB is freed when killing them.
916 */
917 usb_free_urb(urb);
918 }
919
920 return 0;
921
922 err_submit:
923 kfree_skb(skb);
924 err_skb:
925 usb_free_urb(urb);
926 err_urb:
927 kfree(rx_buf);
928 err_rxb:
929 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
930 return ret;
931 }
932
ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb * hif_dev)933 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev)
934 {
935 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted);
936 }
937
ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb * hif_dev)938 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev)
939 {
940 struct rx_buf *rx_buf = NULL;
941 struct sk_buff *skb = NULL;
942 struct urb *urb = NULL;
943 int i, ret;
944
945 init_usb_anchor(&hif_dev->reg_in_submitted);
946
947 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) {
948
949 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL);
950 if (!rx_buf) {
951 ret = -ENOMEM;
952 goto err_rxb;
953 }
954
955 /* Allocate URB */
956 urb = usb_alloc_urb(0, GFP_KERNEL);
957 if (urb == NULL) {
958 ret = -ENOMEM;
959 goto err_urb;
960 }
961
962 /* Allocate buffer */
963 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL);
964 if (!skb) {
965 ret = -ENOMEM;
966 goto err_skb;
967 }
968
969 rx_buf->hif_dev = hif_dev;
970 rx_buf->skb = skb;
971
972 usb_fill_int_urb(urb, hif_dev->udev,
973 usb_rcvintpipe(hif_dev->udev,
974 USB_REG_IN_PIPE),
975 skb->data, MAX_REG_IN_BUF_SIZE,
976 ath9k_hif_usb_reg_in_cb, rx_buf, 1);
977
978 /* Anchor URB */
979 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
980
981 /* Submit URB */
982 ret = usb_submit_urb(urb, GFP_KERNEL);
983 if (ret) {
984 usb_unanchor_urb(urb);
985 goto err_submit;
986 }
987
988 /*
989 * Drop reference count.
990 * This ensures that the URB is freed when killing them.
991 */
992 usb_free_urb(urb);
993 }
994
995 return 0;
996
997 err_submit:
998 kfree_skb(skb);
999 err_skb:
1000 usb_free_urb(urb);
1001 err_urb:
1002 kfree(rx_buf);
1003 err_rxb:
1004 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
1005 return ret;
1006 }
1007
ath9k_hif_usb_alloc_urbs(struct hif_device_usb * hif_dev)1008 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev)
1009 {
1010 /* Register Write */
1011 init_usb_anchor(&hif_dev->regout_submitted);
1012
1013 /* TX */
1014 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0)
1015 goto err;
1016
1017 /* RX */
1018 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0)
1019 goto err_rx;
1020
1021 /* Register Read */
1022 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0)
1023 goto err_reg;
1024
1025 return 0;
1026 err_reg:
1027 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
1028 err_rx:
1029 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
1030 err:
1031 return -ENOMEM;
1032 }
1033
ath9k_hif_usb_dealloc_urbs(struct hif_device_usb * hif_dev)1034 void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev)
1035 {
1036 usb_kill_anchored_urbs(&hif_dev->regout_submitted);
1037 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
1038 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
1039 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
1040 }
1041
ath9k_hif_usb_download_fw(struct hif_device_usb * hif_dev)1042 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev)
1043 {
1044 int transfer, err;
1045 const void *data = hif_dev->fw_data;
1046 size_t len = hif_dev->fw_size;
1047 u32 addr = AR9271_FIRMWARE;
1048 u8 *buf = kzalloc(4096, GFP_KERNEL);
1049 u32 firm_offset;
1050
1051 if (!buf)
1052 return -ENOMEM;
1053
1054 while (len) {
1055 transfer = min_t(size_t, len, 4096);
1056 memcpy(buf, data, transfer);
1057
1058 err = usb_control_msg(hif_dev->udev,
1059 usb_sndctrlpipe(hif_dev->udev, 0),
1060 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT,
1061 addr >> 8, 0, buf, transfer,
1062 USB_MSG_TIMEOUT);
1063 if (err < 0) {
1064 kfree(buf);
1065 return err;
1066 }
1067
1068 len -= transfer;
1069 data += transfer;
1070 addr += transfer;
1071 }
1072 kfree(buf);
1073
1074 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1075 firm_offset = AR7010_FIRMWARE_TEXT;
1076 else
1077 firm_offset = AR9271_FIRMWARE_TEXT;
1078
1079 /*
1080 * Issue FW download complete command to firmware.
1081 */
1082 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0),
1083 FIRMWARE_DOWNLOAD_COMP,
1084 0x40 | USB_DIR_OUT,
1085 firm_offset >> 8, 0, NULL, 0, USB_MSG_TIMEOUT);
1086 if (err)
1087 return -EIO;
1088
1089 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n",
1090 hif_dev->fw_name, (unsigned long) hif_dev->fw_size);
1091
1092 return 0;
1093 }
1094
ath9k_hif_usb_dev_init(struct hif_device_usb * hif_dev)1095 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev)
1096 {
1097 int ret;
1098
1099 ret = ath9k_hif_usb_download_fw(hif_dev);
1100 if (ret) {
1101 dev_err(&hif_dev->udev->dev,
1102 "ath9k_htc: Firmware - %s download failed\n",
1103 hif_dev->fw_name);
1104 return ret;
1105 }
1106
1107 /* Alloc URBs */
1108 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1109 if (ret) {
1110 dev_err(&hif_dev->udev->dev,
1111 "ath9k_htc: Unable to allocate URBs\n");
1112 return ret;
1113 }
1114
1115 return 0;
1116 }
1117
ath9k_hif_usb_dev_deinit(struct hif_device_usb * hif_dev)1118 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev)
1119 {
1120 ath9k_hif_usb_dealloc_urbs(hif_dev);
1121 }
1122
1123 /*
1124 * If initialization fails or the FW cannot be retrieved,
1125 * detach the device.
1126 */
ath9k_hif_usb_firmware_fail(struct hif_device_usb * hif_dev)1127 static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev)
1128 {
1129 struct device *dev = &hif_dev->udev->dev;
1130 struct device *parent = dev->parent;
1131
1132 complete_all(&hif_dev->fw_done);
1133
1134 if (parent)
1135 device_lock(parent);
1136
1137 device_release_driver(dev);
1138
1139 if (parent)
1140 device_unlock(parent);
1141 }
1142
1143 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context);
1144
1145 /* taken from iwlwifi */
ath9k_hif_request_firmware(struct hif_device_usb * hif_dev,bool first)1146 static int ath9k_hif_request_firmware(struct hif_device_usb *hif_dev,
1147 bool first)
1148 {
1149 char index[8], *chip;
1150 int ret;
1151
1152 if (first) {
1153 if (htc_use_dev_fw) {
1154 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX + 1;
1155 sprintf(index, "%s", "dev");
1156 } else {
1157 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX;
1158 sprintf(index, "%d", hif_dev->fw_minor_index);
1159 }
1160 } else {
1161 hif_dev->fw_minor_index--;
1162 sprintf(index, "%d", hif_dev->fw_minor_index);
1163 }
1164
1165 /* test for FW 1.3 */
1166 if (MAJOR_VERSION_REQ == 1 && hif_dev->fw_minor_index == 3) {
1167 const char *filename;
1168
1169 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1170 filename = FIRMWARE_AR7010_1_1;
1171 else
1172 filename = FIRMWARE_AR9271;
1173
1174 /* expected fw locations:
1175 * - htc_9271.fw (stable version 1.3, depricated)
1176 */
1177 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name),
1178 "%s", filename);
1179
1180 } else if (hif_dev->fw_minor_index < FIRMWARE_MINOR_IDX_MIN) {
1181 dev_err(&hif_dev->udev->dev, "no suitable firmware found!\n");
1182
1183 return -ENOENT;
1184 } else {
1185 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1186 chip = "7010";
1187 else
1188 chip = "9271";
1189
1190 /* expected fw locations:
1191 * - ath9k_htc/htc_9271-1.dev.0.fw (development version)
1192 * - ath9k_htc/htc_9271-1.4.0.fw (stable version)
1193 */
1194 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name),
1195 "%s/htc_%s-%d.%s.0.fw", HTC_FW_PATH,
1196 chip, MAJOR_VERSION_REQ, index);
1197 }
1198
1199 ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name,
1200 &hif_dev->udev->dev, GFP_KERNEL,
1201 hif_dev, ath9k_hif_usb_firmware_cb);
1202 if (ret) {
1203 dev_err(&hif_dev->udev->dev,
1204 "ath9k_htc: Async request for firmware %s failed\n",
1205 hif_dev->fw_name);
1206 return ret;
1207 }
1208
1209 dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n",
1210 hif_dev->fw_name);
1211
1212 return ret;
1213 }
1214
ath9k_hif_usb_firmware_cb(const struct firmware * fw,void * context)1215 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context)
1216 {
1217 struct hif_device_usb *hif_dev = context;
1218 int ret;
1219
1220 if (!fw) {
1221 ret = ath9k_hif_request_firmware(hif_dev, false);
1222 if (!ret)
1223 return;
1224
1225 dev_err(&hif_dev->udev->dev,
1226 "ath9k_htc: Failed to get firmware %s\n",
1227 hif_dev->fw_name);
1228 goto err_fw;
1229 }
1230
1231 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb,
1232 &hif_dev->udev->dev);
1233 if (hif_dev->htc_handle == NULL)
1234 goto err_dev_alloc;
1235
1236 hif_dev->fw_data = fw->data;
1237 hif_dev->fw_size = fw->size;
1238
1239 /* Proceed with initialization */
1240
1241 ret = ath9k_hif_usb_dev_init(hif_dev);
1242 if (ret)
1243 goto err_dev_init;
1244
1245 ret = ath9k_htc_hw_init(hif_dev->htc_handle,
1246 &hif_dev->interface->dev,
1247 hif_dev->usb_device_id->idProduct,
1248 hif_dev->udev->product,
1249 hif_dev->usb_device_id->driver_info);
1250 if (ret) {
1251 ret = -EINVAL;
1252 goto err_htc_hw_init;
1253 }
1254
1255 release_firmware(fw);
1256 hif_dev->flags |= HIF_USB_READY;
1257 complete_all(&hif_dev->fw_done);
1258
1259 return;
1260
1261 err_htc_hw_init:
1262 ath9k_hif_usb_dev_deinit(hif_dev);
1263 err_dev_init:
1264 ath9k_htc_hw_free(hif_dev->htc_handle);
1265 err_dev_alloc:
1266 release_firmware(fw);
1267 err_fw:
1268 ath9k_hif_usb_firmware_fail(hif_dev);
1269 }
1270
1271 /*
1272 * An exact copy of the function from zd1211rw.
1273 */
send_eject_command(struct usb_interface * interface)1274 static int send_eject_command(struct usb_interface *interface)
1275 {
1276 struct usb_device *udev = interface_to_usbdev(interface);
1277 struct usb_host_interface *iface_desc = interface->cur_altsetting;
1278 struct usb_endpoint_descriptor *endpoint;
1279 unsigned char *cmd;
1280 u8 bulk_out_ep;
1281 int r;
1282
1283 if (iface_desc->desc.bNumEndpoints < 2)
1284 return -ENODEV;
1285
1286 /* Find bulk out endpoint */
1287 for (r = 1; r >= 0; r--) {
1288 endpoint = &iface_desc->endpoint[r].desc;
1289 if (usb_endpoint_dir_out(endpoint) &&
1290 usb_endpoint_xfer_bulk(endpoint)) {
1291 bulk_out_ep = endpoint->bEndpointAddress;
1292 break;
1293 }
1294 }
1295 if (r == -1) {
1296 dev_err(&udev->dev,
1297 "ath9k_htc: Could not find bulk out endpoint\n");
1298 return -ENODEV;
1299 }
1300
1301 cmd = kzalloc(31, GFP_KERNEL);
1302 if (cmd == NULL)
1303 return -ENODEV;
1304
1305 /* USB bulk command block */
1306 cmd[0] = 0x55; /* bulk command signature */
1307 cmd[1] = 0x53; /* bulk command signature */
1308 cmd[2] = 0x42; /* bulk command signature */
1309 cmd[3] = 0x43; /* bulk command signature */
1310 cmd[14] = 6; /* command length */
1311
1312 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
1313 cmd[19] = 0x2; /* eject disc */
1314
1315 dev_info(&udev->dev, "Ejecting storage device...\n");
1316 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
1317 cmd, 31, NULL, 2 * USB_MSG_TIMEOUT);
1318 kfree(cmd);
1319 if (r)
1320 return r;
1321
1322 /* At this point, the device disconnects and reconnects with the real
1323 * ID numbers. */
1324
1325 usb_set_intfdata(interface, NULL);
1326 return 0;
1327 }
1328
ath9k_hif_usb_probe(struct usb_interface * interface,const struct usb_device_id * id)1329 static int ath9k_hif_usb_probe(struct usb_interface *interface,
1330 const struct usb_device_id *id)
1331 {
1332 struct usb_device *udev = interface_to_usbdev(interface);
1333 struct hif_device_usb *hif_dev;
1334 int ret = 0;
1335
1336 if (id->driver_info == STORAGE_DEVICE)
1337 return send_eject_command(interface);
1338
1339 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL);
1340 if (!hif_dev) {
1341 ret = -ENOMEM;
1342 goto err_alloc;
1343 }
1344
1345 usb_get_dev(udev);
1346
1347 hif_dev->udev = udev;
1348 hif_dev->interface = interface;
1349 hif_dev->usb_device_id = id;
1350 #ifdef CONFIG_PM
1351 udev->reset_resume = 1;
1352 #endif
1353 usb_set_intfdata(interface, hif_dev);
1354
1355 init_completion(&hif_dev->fw_done);
1356
1357 ret = ath9k_hif_request_firmware(hif_dev, true);
1358 if (ret)
1359 goto err_fw_req;
1360
1361 return ret;
1362
1363 err_fw_req:
1364 usb_set_intfdata(interface, NULL);
1365 kfree(hif_dev);
1366 usb_put_dev(udev);
1367 err_alloc:
1368 return ret;
1369 }
1370
ath9k_hif_usb_reboot(struct usb_device * udev)1371 static void ath9k_hif_usb_reboot(struct usb_device *udev)
1372 {
1373 u32 reboot_cmd = 0xffffffff;
1374 void *buf;
1375 int ret;
1376
1377 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL);
1378 if (!buf)
1379 return;
1380
1381 ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE),
1382 buf, 4, NULL, USB_MSG_TIMEOUT);
1383 if (ret)
1384 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
1385
1386 kfree(buf);
1387 }
1388
ath9k_hif_usb_disconnect(struct usb_interface * interface)1389 static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
1390 {
1391 struct usb_device *udev = interface_to_usbdev(interface);
1392 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1393 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false;
1394
1395 if (!hif_dev)
1396 return;
1397
1398 wait_for_completion(&hif_dev->fw_done);
1399
1400 if (hif_dev->flags & HIF_USB_READY) {
1401 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged);
1402 ath9k_hif_usb_dev_deinit(hif_dev);
1403 ath9k_destroy_wmi(hif_dev->htc_handle->drv_priv);
1404 ath9k_htc_hw_free(hif_dev->htc_handle);
1405 }
1406
1407 usb_set_intfdata(interface, NULL);
1408
1409 /* If firmware was loaded we should drop it
1410 * go back to first stage bootloader. */
1411 if (!unplugged && (hif_dev->flags & HIF_USB_READY))
1412 ath9k_hif_usb_reboot(udev);
1413
1414 kfree(hif_dev);
1415 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");
1416 usb_put_dev(udev);
1417 }
1418
1419 #ifdef CONFIG_PM
ath9k_hif_usb_suspend(struct usb_interface * interface,pm_message_t message)1420 static int ath9k_hif_usb_suspend(struct usb_interface *interface,
1421 pm_message_t message)
1422 {
1423 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1424
1425 /*
1426 * The device has to be set to FULLSLEEP mode in case no
1427 * interface is up.
1428 */
1429 if (!(hif_dev->flags & HIF_USB_START))
1430 ath9k_htc_suspend(hif_dev->htc_handle);
1431
1432 wait_for_completion(&hif_dev->fw_done);
1433
1434 if (hif_dev->flags & HIF_USB_READY)
1435 ath9k_hif_usb_dealloc_urbs(hif_dev);
1436
1437 return 0;
1438 }
1439
ath9k_hif_usb_resume(struct usb_interface * interface)1440 static int ath9k_hif_usb_resume(struct usb_interface *interface)
1441 {
1442 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1443 struct htc_target *htc_handle = hif_dev->htc_handle;
1444 int ret;
1445 const struct firmware *fw;
1446
1447 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1448 if (ret)
1449 return ret;
1450
1451 if (hif_dev->flags & HIF_USB_READY) {
1452 /* request cached firmware during suspend/resume cycle */
1453 ret = request_firmware(&fw, hif_dev->fw_name,
1454 &hif_dev->udev->dev);
1455 if (ret)
1456 goto fail_resume;
1457
1458 hif_dev->fw_data = fw->data;
1459 hif_dev->fw_size = fw->size;
1460 ret = ath9k_hif_usb_download_fw(hif_dev);
1461 release_firmware(fw);
1462 if (ret)
1463 goto fail_resume;
1464 } else {
1465 ath9k_hif_usb_dealloc_urbs(hif_dev);
1466 return -EIO;
1467 }
1468
1469 mdelay(100);
1470
1471 ret = ath9k_htc_resume(htc_handle);
1472
1473 if (ret)
1474 goto fail_resume;
1475
1476 return 0;
1477
1478 fail_resume:
1479 ath9k_hif_usb_dealloc_urbs(hif_dev);
1480
1481 return ret;
1482 }
1483 #endif
1484
1485 static struct usb_driver ath9k_hif_usb_driver = {
1486 .name = KBUILD_MODNAME,
1487 .probe = ath9k_hif_usb_probe,
1488 .disconnect = ath9k_hif_usb_disconnect,
1489 #ifdef CONFIG_PM
1490 .suspend = ath9k_hif_usb_suspend,
1491 .resume = ath9k_hif_usb_resume,
1492 .reset_resume = ath9k_hif_usb_resume,
1493 #endif
1494 .id_table = ath9k_hif_usb_ids,
1495 .soft_unbind = 1,
1496 .disable_hub_initiated_lpm = 1,
1497 };
1498
ath9k_hif_usb_init(void)1499 int ath9k_hif_usb_init(void)
1500 {
1501 return usb_register(&ath9k_hif_usb_driver);
1502 }
1503
ath9k_hif_usb_exit(void)1504 void ath9k_hif_usb_exit(void)
1505 {
1506 usb_deregister(&ath9k_hif_usb_driver);
1507 }
1508