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[mirror_ubuntu-bionic-kernel.git] / drivers / net / wireless / ath / ath9k / hif_usb.c
CommitLineData
fb9987d0
S		 1/*
2 * Copyright (c) 2010 Atheros Communications Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include "htc.h"
18
d0ee0ebe
JL		 19/* identify firmware images */
20#define FIRMWARE_AR7010 "ar7010.fw"
21#define FIRMWARE_AR7010_1_1 "ar7010_1_1.fw"
22#define FIRMWARE_AR9271 "ar9271.fw"
23
24MODULE_FIRMWARE(FIRMWARE_AR7010);
25MODULE_FIRMWARE(FIRMWARE_AR7010_1_1);
26MODULE_FIRMWARE(FIRMWARE_AR9271);
27
fb9987d0 28static struct usb_device_id ath9k_hif_usb_ids[] = {
4e63f768
S		 29 { USB_DEVICE(0x0cf3, 0x9271) }, /* Atheros */
30 { USB_DEVICE(0x0cf3, 0x1006) }, /* Atheros */
4e63f768 31 { USB_DEVICE(0x0846, 0x9030) }, /* Netgear N150 */
4e63f768
S		 32 { USB_DEVICE(0x07D1, 0x3A10) }, /* Dlink Wireless 150 */
33 { USB_DEVICE(0x13D3, 0x3327) }, /* Azurewave */
34 { USB_DEVICE(0x13D3, 0x3328) }, /* Azurewave */
ac618d70 35 { USB_DEVICE(0x13D3, 0x3346) }, /* IMC Networks */
32b08955
RM		 36 { USB_DEVICE(0x13D3, 0x3348) }, /* Azurewave */
37 { USB_DEVICE(0x13D3, 0x3349) }, /* Azurewave */
38 { USB_DEVICE(0x13D3, 0x3350) }, /* Azurewave */
4e63f768 39 { USB_DEVICE(0x04CA, 0x4605) }, /* Liteon */
32b08955 40 { USB_DEVICE(0x040D, 0x3801) }, /* VIA */
452d7dd8 41 { USB_DEVICE(0x0cf3, 0xb003) }, /* Ubiquiti WifiStation Ext */
0b5ead91
SM		 42
43 { USB_DEVICE(0x0cf3, 0x7015),
44 .driver_info = AR9287_USB }, /* Atheros */
64f12170 45 { USB_DEVICE(0x1668, 0x1200),
0b5ead91
SM		 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
fb9987d0
S		 55 { },
56};
57
58MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids);
59
60static int __hif_usb_tx(struct hif_device_usb *hif_dev);
61
62static void hif_usb_regout_cb(struct urb *urb)
63{
64 struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
fb9987d0
S		 65
66 switch (urb->status) {
67 case 0:
68 break;
69 case -ENOENT:
70 case -ECONNRESET:
fb9987d0
S		 71 case -ENODEV:
72 case -ESHUTDOWN:
6f0f2669 73 goto free;
fb9987d0
S		 74 default:
75 break;
76 }
77
78 if (cmd) {
79 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
80 cmd->skb, 1);
81 kfree(cmd);
fb9987d0 82 }
6f0f2669
S		 83
84 return;
85free:
0fa35a58 86 kfree_skb(cmd->skb);
6f0f2669 87 kfree(cmd);
fb9987d0
S		 88}
89
90static int hif_usb_send_regout(struct hif_device_usb *hif_dev,
91 struct sk_buff *skb)
92{
93 struct urb *urb;
94 struct cmd_buf *cmd;
95 int ret = 0;
96
97 urb = usb_alloc_urb(0, GFP_KERNEL);
98 if (urb == NULL)
99 return -ENOMEM;
100
101 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
102 if (cmd == NULL) {
103 usb_free_urb(urb);
104 return -ENOMEM;
105 }
106
107 cmd->skb = skb;
108 cmd->hif_dev = hif_dev;
109
4a0e8ecc
RM		 110 usb_fill_bulk_urb(urb, hif_dev->udev,
111 usb_sndbulkpipe(hif_dev->udev, USB_REG_OUT_PIPE),
fb9987d0 112 skb->data, skb->len,
4a0e8ecc 113 hif_usb_regout_cb, cmd);
fb9987d0 114
6f0f2669 115 usb_anchor_urb(urb, &hif_dev->regout_submitted);
fb9987d0
S		 116 ret = usb_submit_urb(urb, GFP_KERNEL);
117 if (ret) {
6f0f2669 118 usb_unanchor_urb(urb);
fb9987d0
S		 119 kfree(cmd);
120 }
6f0f2669 121 usb_free_urb(urb);
fb9987d0
S		 122
123 return ret;
124}
125
c11d8f89
S		 126static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev,
127 struct sk_buff_head *list)
128{
129 struct sk_buff *skb;
130
131 while ((skb = __skb_dequeue(list)) != NULL) {
132 dev_kfree_skb_any(skb);
133 TX_STAT_INC(skb_dropped);
134 }
135}
136
fb9987d0
S		 137static void hif_usb_tx_cb(struct urb *urb)
138{
139 struct tx_buf *tx_buf = (struct tx_buf *) urb->context;
690e781c 140 struct hif_device_usb *hif_dev;
fb9987d0 141 struct sk_buff *skb;
fb9987d0 142
690e781c 143 if (!tx_buf || !tx_buf->hif_dev)
fb9987d0
S		 144 return;
145
690e781c
DC		 146 hif_dev = tx_buf->hif_dev;
147
fb9987d0
S		 148 switch (urb->status) {
149 case 0:
150 break;
151 case -ENOENT:
152 case -ECONNRESET:
fb9987d0
S		 153 case -ENODEV:
154 case -ESHUTDOWN:
c11d8f89
S		 155 /*
156 * The URB has been killed, free the SKBs
157 * and return.
158 */
159 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
fb9987d0
S		 160 return;
161 default:
162 break;
163 }
164
c11d8f89
S		 165 /* Check if TX has been stopped */
166 spin_lock(&hif_dev->tx.tx_lock);
167 if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
fb9987d0 168 spin_unlock(&hif_dev->tx.tx_lock);
c11d8f89
S		 169 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
170 goto add_free;
fb9987d0 171 }
c11d8f89 172 spin_unlock(&hif_dev->tx.tx_lock);
fb9987d0 173
c11d8f89
S		 174 /* Complete the queued SKBs. */
175 while ((skb = __skb_dequeue(&tx_buf->skb_queue)) != NULL) {
176 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
177 skb, 1);
178 TX_STAT_INC(skb_completed);
eac8e385 179 }
c11d8f89
S		 180
181add_free:
182 /* Re-initialize the SKB queue */
183 tx_buf->len = tx_buf->offset = 0;
184 __skb_queue_head_init(&tx_buf->skb_queue);
185
186 /* Add this TX buffer to the free list */
187 spin_lock(&hif_dev->tx.tx_lock);
188 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
189 hif_dev->tx.tx_buf_cnt++;
190 if (!(hif_dev->tx.flags & HIF_USB_TX_STOP))
191 __hif_usb_tx(hif_dev); /* Check for pending SKBs */
192 TX_STAT_INC(buf_completed);
193 spin_unlock(&hif_dev->tx.tx_lock);
f8e1d080
ML		 194}
195
fb9987d0
S		 196/* TX lock has to be taken */
197static int __hif_usb_tx(struct hif_device_usb *hif_dev)
198{
199 struct tx_buf *tx_buf = NULL;
200 struct sk_buff *nskb = NULL;
201 int ret = 0, i;
202 u16 *hdr, tx_skb_cnt = 0;
203 u8 *buf;
204
205 if (hif_dev->tx.tx_skb_cnt == 0)
206 return 0;
207
208 /* Check if a free TX buffer is available */
209 if (list_empty(&hif_dev->tx.tx_buf))
210 return 0;
211
212 tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list);
c11d8f89 213 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending);
fb9987d0
S		 214 hif_dev->tx.tx_buf_cnt--;
215
216 tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM);
217
218 for (i = 0; i < tx_skb_cnt; i++) {
219 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue);
220
221 /* Should never be NULL */
222 BUG_ON(!nskb);
223
224 hif_dev->tx.tx_skb_cnt--;
225
226 buf = tx_buf->buf;
227 buf += tx_buf->offset;
228 hdr = (u16 *)buf;
229 *hdr++ = nskb->len;
230 *hdr++ = ATH_USB_TX_STREAM_MODE_TAG;
231 buf += 4;
232 memcpy(buf, nskb->data, nskb->len);
233 tx_buf->len = nskb->len + 4;
234
235 if (i < (tx_skb_cnt - 1))
236 tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4;
237
238 if (i == (tx_skb_cnt - 1))
239 tx_buf->len += tx_buf->offset;
240
241 __skb_queue_tail(&tx_buf->skb_queue, nskb);
242 TX_STAT_INC(skb_queued);
243 }
244
245 usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev,
246 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
247 tx_buf->buf, tx_buf->len,
248 hif_usb_tx_cb, tx_buf);
249
250 ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC);
251 if (ret) {
252 tx_buf->len = tx_buf->offset = 0;
eac8e385 253 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
fb9987d0
S		 254 __skb_queue_head_init(&tx_buf->skb_queue);
255 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
256 hif_dev->tx.tx_buf_cnt++;
257 }
258
259 if (!ret)
260 TX_STAT_INC(buf_queued);
261
262 return ret;
263}
264
265static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb,
266 struct ath9k_htc_tx_ctl *tx_ctl)
267{
268 unsigned long flags;
269
270 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
271
272 if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
273 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
274 return -ENODEV;
275 }
276
277 /* Check if the max queue count has been reached */
278 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) {
279 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
280 return -ENOMEM;
281 }
282
283 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb);
284 hif_dev->tx.tx_skb_cnt++;
285
286 /* Send normal frames immediately */
287 if (!tx_ctl || (tx_ctl && (tx_ctl->type == ATH9K_HTC_NORMAL)))
288 __hif_usb_tx(hif_dev);
289
290 /* Check if AMPDUs have to be sent immediately */
291 if (tx_ctl && (tx_ctl->type == ATH9K_HTC_AMPDU) &&
292 (hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) &&
293 (hif_dev->tx.tx_skb_cnt < 2)) {
294 __hif_usb_tx(hif_dev);
295 }
296
297 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
298
299 return 0;
300}
301
302static void hif_usb_start(void *hif_handle, u8 pipe_id)
303{
304 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
305 unsigned long flags;
306
307 hif_dev->flags |= HIF_USB_START;
308
309 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
310 hif_dev->tx.flags &= ~HIF_USB_TX_STOP;
311 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
312}
313
314static void hif_usb_stop(void *hif_handle, u8 pipe_id)
315{
316 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
317 unsigned long flags;
318
319 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
eac8e385 320 ath9k_skb_queue_purge(hif_dev, &hif_dev->tx.tx_skb_queue);
fb9987d0
S		 321 hif_dev->tx.tx_skb_cnt = 0;
322 hif_dev->tx.flags |= HIF_USB_TX_STOP;
323 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
324}
325
326static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb,
327 struct ath9k_htc_tx_ctl *tx_ctl)
328{
329 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
330 int ret = 0;
331
332 switch (pipe_id) {
333 case USB_WLAN_TX_PIPE:
334 ret = hif_usb_send_tx(hif_dev, skb, tx_ctl);
335 break;
336 case USB_REG_OUT_PIPE:
337 ret = hif_usb_send_regout(hif_dev, skb);
338 break;
339 default:
6335ed0f
S		 340 dev_err(&hif_dev->udev->dev,
341 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id);
fb9987d0
S		 342 ret = -EINVAL;
343 break;
344 }
345
346 return ret;
347}
348
349static struct ath9k_htc_hif hif_usb = {
350 .transport = ATH9K_HIF_USB,
351 .name = "ath9k_hif_usb",
352
353 .control_ul_pipe = USB_REG_OUT_PIPE,
354 .control_dl_pipe = USB_REG_IN_PIPE,
355
356 .start = hif_usb_start,
357 .stop = hif_usb_stop,
358 .send = hif_usb_send,
359};
360
361static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev,
362 struct sk_buff *skb)
363{
c503269a 364 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER];
44b23b48
JP		 365 int index = 0, i = 0, len = skb->len;
366 int rx_remain_len, rx_pkt_len;
367 u16 pool_index = 0;
fb9987d0
S		 368 u8 *ptr;
369
46baa1a2
S		 370 spin_lock(&hif_dev->rx_lock);
371
fb9987d0
S		 372 rx_remain_len = hif_dev->rx_remain_len;
373 rx_pkt_len = hif_dev->rx_transfer_len;
374
375 if (rx_remain_len != 0) {
376 struct sk_buff *remain_skb = hif_dev->remain_skb;
377
378 if (remain_skb) {
379 ptr = (u8 *) remain_skb->data;
380
381 index = rx_remain_len;
382 rx_remain_len -= hif_dev->rx_pad_len;
383 ptr += rx_pkt_len;
384
385 memcpy(ptr, skb->data, rx_remain_len);
386
387 rx_pkt_len += rx_remain_len;
388 hif_dev->rx_remain_len = 0;
389 skb_put(remain_skb, rx_pkt_len);
390
391 skb_pool[pool_index++] = remain_skb;
392
393 } else {
394 index = rx_remain_len;
395 }
396 }
397
46baa1a2
S		 398 spin_unlock(&hif_dev->rx_lock);
399
fb9987d0 400 while (index < len) {
44b23b48
JP		 401 u16 pkt_len;
402 u16 pkt_tag;
403 u16 pad_len;
404 int chk_idx;
405
fb9987d0
S		 406 ptr = (u8 *) skb->data;
407
408 pkt_len = ptr[index] + (ptr[index+1] << 8);
409 pkt_tag = ptr[index+2] + (ptr[index+3] << 8);
410
44b23b48
JP		 411 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) {
412 RX_STAT_INC(skb_dropped);
413 return;
414 }
415
416 pad_len = 4 - (pkt_len & 0x3);
417 if (pad_len == 4)
418 pad_len = 0;
419
420 chk_idx = index;
421 index = index + 4 + pkt_len + pad_len;
422
423 if (index > MAX_RX_BUF_SIZE) {
424 spin_lock(&hif_dev->rx_lock);
425 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE;
426 hif_dev->rx_transfer_len =
427 MAX_RX_BUF_SIZE - chk_idx - 4;
428 hif_dev->rx_pad_len = pad_len;
429
430 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
431 if (!nskb) {
432 dev_err(&hif_dev->udev->dev,
433 "ath9k_htc: RX memory allocation error\n");
46baa1a2 434 spin_unlock(&hif_dev->rx_lock);
44b23b48 435 goto err;
fb9987d0 436 }
44b23b48
JP		 437 skb_reserve(nskb, 32);
438 RX_STAT_INC(skb_allocated);
439
440 memcpy(nskb->data, &(skb->data[chk_idx+4]),
441 hif_dev->rx_transfer_len);
442
443 /* Record the buffer pointer */
444 hif_dev->remain_skb = nskb;
445 spin_unlock(&hif_dev->rx_lock);
fb9987d0 446 } else {
44b23b48
JP		 447 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
448 if (!nskb) {
449 dev_err(&hif_dev->udev->dev,
450 "ath9k_htc: RX memory allocation error\n");
451 goto err;
452 }
453 skb_reserve(nskb, 32);
454 RX_STAT_INC(skb_allocated);
455
456 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len);
457 skb_put(nskb, pkt_len);
458 skb_pool[pool_index++] = nskb;
fb9987d0
S		 459 }
460 }
461
462err:
fb9987d0
S		 463 for (i = 0; i < pool_index; i++) {
464 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i],
465 skb_pool[i]->len, USB_WLAN_RX_PIPE);
466 RX_STAT_INC(skb_completed);
467 }
468}
469
470static void ath9k_hif_usb_rx_cb(struct urb *urb)
471{
472 struct sk_buff *skb = (struct sk_buff *) urb->context;
b2767363 473 struct hif_device_usb *hif_dev =
fb9987d0
S		 474 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
475 int ret;
476
6335ed0f
S		 477 if (!skb)
478 return;
479
fb9987d0
S		 480 if (!hif_dev)
481 goto free;
482
483 switch (urb->status) {
484 case 0:
485 break;
486 case -ENOENT:
487 case -ECONNRESET:
488 case -ENODEV:
489 case -ESHUTDOWN:
490 goto free;
491 default:
492 goto resubmit;
493 }
494
495 if (likely(urb->actual_length != 0)) {
496 skb_put(skb, urb->actual_length);
fb9987d0 497 ath9k_hif_usb_rx_stream(hif_dev, skb);
fb9987d0
S		 498 }
499
500resubmit:
501 skb_reset_tail_pointer(skb);
502 skb_trim(skb, 0);
503
6335ed0f 504 usb_anchor_urb(urb, &hif_dev->rx_submitted);
fb9987d0 505 ret = usb_submit_urb(urb, GFP_ATOMIC);
6335ed0f
S		 506 if (ret) {
507 usb_unanchor_urb(urb);
fb9987d0 508 goto free;
6335ed0f 509 }
fb9987d0
S		 510
511 return;
512free:
f28a7b30 513 kfree_skb(skb);
fb9987d0
S		 514}
515
516static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
517{
518 struct sk_buff *skb = (struct sk_buff *) urb->context;
519 struct sk_buff *nskb;
b2767363 520 struct hif_device_usb *hif_dev =
fb9987d0
S		 521 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
522 int ret;
523
6335ed0f
S		 524 if (!skb)
525 return;
526
fb9987d0
S		 527 if (!hif_dev)
528 goto free;
529
530 switch (urb->status) {
531 case 0:
532 break;
533 case -ENOENT:
534 case -ECONNRESET:
535 case -ENODEV:
536 case -ESHUTDOWN:
537 goto free;
538 default:
539 goto resubmit;
540 }
541
542 if (likely(urb->actual_length != 0)) {
543 skb_put(skb, urb->actual_length);
544
5ab0af32
S		 545 /* Process the command first */
546 ath9k_htc_rx_msg(hif_dev->htc_handle, skb,
547 skb->len, USB_REG_IN_PIPE);
548
549
e6c6d33c 550 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC);
5ab0af32
S		 551 if (!nskb) {
552 dev_err(&hif_dev->udev->dev,
553 "ath9k_htc: REG_IN memory allocation failure\n");
554 urb->context = NULL;
555 return;
556 }
fb9987d0 557
490b3f4e 558 usb_fill_bulk_urb(urb, hif_dev->udev,
0f529e98
RM		 559 usb_rcvbulkpipe(hif_dev->udev,
560 USB_REG_IN_PIPE),
fb9987d0 561 nskb->data, MAX_REG_IN_BUF_SIZE,
490b3f4e 562 ath9k_hif_usb_reg_in_cb, nskb);
fb9987d0
S		 563
564 ret = usb_submit_urb(urb, GFP_ATOMIC);
565 if (ret) {
e6c6d33c 566 kfree_skb(nskb);
5ab0af32 567 urb->context = NULL;
fb9987d0
S		 568 }
569
fb9987d0
S		 570 return;
571 }
572
573resubmit:
574 skb_reset_tail_pointer(skb);
575 skb_trim(skb, 0);
576
577 ret = usb_submit_urb(urb, GFP_ATOMIC);
578 if (ret)
579 goto free;
580
581 return;
582free:
e6c6d33c 583 kfree_skb(skb);
6335ed0f 584 urb->context = NULL;
fb9987d0
S		 585}
586
587static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
588{
fb9987d0
S		 589 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
590
c11d8f89
S		 591 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
592 &hif_dev->tx.tx_buf, list) {
593 usb_kill_urb(tx_buf->urb);
fb9987d0
S		 594 list_del(&tx_buf->list);
595 usb_free_urb(tx_buf->urb);
596 kfree(tx_buf->buf);
597 kfree(tx_buf);
598 }
599
fb9987d0
S		 600 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
601 &hif_dev->tx.tx_pending, list) {
602 usb_kill_urb(tx_buf->urb);
603 list_del(&tx_buf->list);
604 usb_free_urb(tx_buf->urb);
605 kfree(tx_buf->buf);
606 kfree(tx_buf);
607 }
fb9987d0
S		 608}
609
610static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev)
611{
612 struct tx_buf *tx_buf;
613 int i;
614
615 INIT_LIST_HEAD(&hif_dev->tx.tx_buf);
616 INIT_LIST_HEAD(&hif_dev->tx.tx_pending);
617 spin_lock_init(&hif_dev->tx.tx_lock);
618 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue);
619
620 for (i = 0; i < MAX_TX_URB_NUM; i++) {
621 tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL);
622 if (!tx_buf)
623 goto err;
624
625 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL);
626 if (!tx_buf->buf)
627 goto err;
628
629 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL);
630 if (!tx_buf->urb)
631 goto err;
632
633 tx_buf->hif_dev = hif_dev;
634 __skb_queue_head_init(&tx_buf->skb_queue);
635
636 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
637 }
638
639 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM;
640
641 return 0;
642err:
7606688a
DC		 643 if (tx_buf) {
644 kfree(tx_buf->buf);
645 kfree(tx_buf);
646 }
fb9987d0
S		 647 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
648 return -ENOMEM;
649}
650
fb9987d0
S		 651static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev)
652{
6335ed0f 653 usb_kill_anchored_urbs(&hif_dev->rx_submitted);
fb9987d0
S		 654}
655
656static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
657{
6335ed0f
S		 658 struct urb *urb = NULL;
659 struct sk_buff *skb = NULL;
fb9987d0
S		 660 int i, ret;
661
6335ed0f 662 init_usb_anchor(&hif_dev->rx_submitted);
46baa1a2 663 spin_lock_init(&hif_dev->rx_lock);
6335ed0f 664
fb9987d0
S		 665 for (i = 0; i < MAX_RX_URB_NUM; i++) {
666
667 /* Allocate URB */
6335ed0f
S		 668 urb = usb_alloc_urb(0, GFP_KERNEL);
669 if (urb == NULL) {
fb9987d0 670 ret = -ENOMEM;
6335ed0f 671 goto err_urb;
fb9987d0
S		 672 }
673
674 /* Allocate buffer */
f28a7b30 675 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL);
6335ed0f
S		 676 if (!skb) {
677 ret = -ENOMEM;
678 goto err_skb;
679 }
fb9987d0 680
6335ed0f
S		 681 usb_fill_bulk_urb(urb, hif_dev->udev,
682 usb_rcvbulkpipe(hif_dev->udev,
683 USB_WLAN_RX_PIPE),
684 skb->data, MAX_RX_BUF_SIZE,
685 ath9k_hif_usb_rx_cb, skb);
686
687 /* Anchor URB */
688 usb_anchor_urb(urb, &hif_dev->rx_submitted);
fb9987d0 689
6335ed0f
S		 690 /* Submit URB */
691 ret = usb_submit_urb(urb, GFP_KERNEL);
692 if (ret) {
693 usb_unanchor_urb(urb);
694 goto err_submit;
695 }
66b10e33
S		 696
697 /*
698 * Drop reference count.
699 * This ensures that the URB is freed when killing them.
700 */
701 usb_free_urb(urb);
fb9987d0
S		 702 }
703
704 return 0;
705
6335ed0f 706err_submit:
f28a7b30 707 kfree_skb(skb);
6335ed0f
S		 708err_skb:
709 usb_free_urb(urb);
710err_urb:
fb9987d0
S		 711 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
712 return ret;
713}
714
715static void ath9k_hif_usb_dealloc_reg_in_urb(struct hif_device_usb *hif_dev)
716{
717 if (hif_dev->reg_in_urb) {
718 usb_kill_urb(hif_dev->reg_in_urb);
6335ed0f 719 if (hif_dev->reg_in_urb->context)
e6c6d33c 720 kfree_skb((void *)hif_dev->reg_in_urb->context);
fb9987d0
S		 721 usb_free_urb(hif_dev->reg_in_urb);
722 hif_dev->reg_in_urb = NULL;
723 }
724}
725
726static int ath9k_hif_usb_alloc_reg_in_urb(struct hif_device_usb *hif_dev)
727{
728 struct sk_buff *skb;
729
730 hif_dev->reg_in_urb = usb_alloc_urb(0, GFP_KERNEL);
731 if (hif_dev->reg_in_urb == NULL)
732 return -ENOMEM;
733
e6c6d33c 734 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL);
fb9987d0
S		 735 if (!skb)
736 goto err;
737
490b3f4e 738 usb_fill_bulk_urb(hif_dev->reg_in_urb, hif_dev->udev,
0f529e98
RM		 739 usb_rcvbulkpipe(hif_dev->udev,
740 USB_REG_IN_PIPE),
fb9987d0 741 skb->data, MAX_REG_IN_BUF_SIZE,
490b3f4e 742 ath9k_hif_usb_reg_in_cb, skb);
fb9987d0
S		 743
744 if (usb_submit_urb(hif_dev->reg_in_urb, GFP_KERNEL) != 0)
6335ed0f 745 goto err;
fb9987d0
S		 746
747 return 0;
748
fb9987d0
S		 749err:
750 ath9k_hif_usb_dealloc_reg_in_urb(hif_dev);
751 return -ENOMEM;
752}
753
754static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev)
755{
6f0f2669
S		 756 /* Register Write */
757 init_usb_anchor(&hif_dev->regout_submitted);
758
fb9987d0
S		 759 /* TX */
760 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0)
761 goto err;
762
763 /* RX */
764 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0)
f8036965 765 goto err_rx;
fb9987d0 766
6f0f2669 767 /* Register Read */
fb9987d0 768 if (ath9k_hif_usb_alloc_reg_in_urb(hif_dev) < 0)
f8036965 769 goto err_reg;
fb9987d0
S		 770
771 return 0;
f8036965
RM		 772err_reg:
773 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
774err_rx:
775 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
fb9987d0
S		 776err:
777 return -ENOMEM;
778}
779
1d8af8ca
SM		 780static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev)
781{
782 usb_kill_anchored_urbs(&hif_dev->regout_submitted);
783 ath9k_hif_usb_dealloc_reg_in_urb(hif_dev);
784 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
785 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
786}
787
fa6e15e0
RM		 788static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev,
789 u32 drv_info)
fb9987d0
S		 790{
791 int transfer, err;
792 const void *data = hif_dev->firmware->data;
793 size_t len = hif_dev->firmware->size;
794 u32 addr = AR9271_FIRMWARE;
795 u8 *buf = kzalloc(4096, GFP_KERNEL);
b1762862 796 u32 firm_offset;
fb9987d0
S		 797
798 if (!buf)
799 return -ENOMEM;
800
801 while (len) {
802 transfer = min_t(int, len, 4096);
803 memcpy(buf, data, transfer);
804
805 err = usb_control_msg(hif_dev->udev,
806 usb_sndctrlpipe(hif_dev->udev, 0),
807 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT,
808 addr >> 8, 0, buf, transfer, HZ);
809 if (err < 0) {
810 kfree(buf);
811 return err;
812 }
813
814 len -= transfer;
815 data += transfer;
816 addr += transfer;
817 }
818 kfree(buf);
819
0b5ead91 820 if (IS_AR7010_DEVICE(drv_info))
b1762862 821 firm_offset = AR7010_FIRMWARE_TEXT;
fa6e15e0 822 else
b1762862
S		 823 firm_offset = AR9271_FIRMWARE_TEXT;
824
fb9987d0
S		 825 /*
826 * Issue FW download complete command to firmware.
827 */
828 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0),
829 FIRMWARE_DOWNLOAD_COMP,
830 0x40 | USB_DIR_OUT,
b1762862 831 firm_offset >> 8, 0, NULL, 0, HZ);
fb9987d0
S		 832 if (err)
833 return -EIO;
834
835 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n",
ce43cee5 836 hif_dev->fw_name, (unsigned long) hif_dev->firmware->size);
fb9987d0
S		 837
838 return 0;
839}
840
fa6e15e0 841static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev, u32 drv_info)
fb9987d0 842{
4a0e8ecc
RM		 843 int ret, idx;
844 struct usb_host_interface *alt = &hif_dev->interface->altsetting[0];
845 struct usb_endpoint_descriptor *endp;
fb9987d0
S		 846
847 /* Request firmware */
ce43cee5
S		 848 ret = request_firmware(&hif_dev->firmware, hif_dev->fw_name,
849 &hif_dev->udev->dev);
fb9987d0
S		 850 if (ret) {
851 dev_err(&hif_dev->udev->dev,
ce43cee5 852 "ath9k_htc: Firmware - %s not found\n", hif_dev->fw_name);
fb9987d0
S		 853 goto err_fw_req;
854 }
855
1d8af8ca 856 /* Download firmware */
fa6e15e0 857 ret = ath9k_hif_usb_download_fw(hif_dev, drv_info);
1d8af8ca
SM		 858 if (ret) {
859 dev_err(&hif_dev->udev->dev,
ce43cee5
S		 860 "ath9k_htc: Firmware - %s download failed\n",
861 hif_dev->fw_name);
1d8af8ca
SM		 862 goto err_fw_download;
863 }
864
4a0e8ecc
RM		 865 /* On downloading the firmware to the target, the USB descriptor of EP4
866 * is 'patched' to change the type of the endpoint to Bulk. This will
867 * bring down CPU usage during the scan period.
868 */
869 for (idx = 0; idx < alt->desc.bNumEndpoints; idx++) {
870 endp = &alt->endpoint[idx].desc;
490b3f4e
RM		 871 if ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
872 == USB_ENDPOINT_XFER_INT) {
4a0e8ecc
RM		 873 endp->bmAttributes &= ~USB_ENDPOINT_XFERTYPE_MASK;
874 endp->bmAttributes |= USB_ENDPOINT_XFER_BULK;
875 endp->bInterval = 0;
876 }
877 }
878
490b3f4e
RM		 879 /* Alloc URBs */
880 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
881 if (ret) {
882 dev_err(&hif_dev->udev->dev,
883 "ath9k_htc: Unable to allocate URBs\n");
884 goto err_urb;
885 }
886
fb9987d0
S		 887 return 0;
888
1d8af8ca 889err_urb:
caa0a99a
SM		 890 ath9k_hif_usb_dealloc_urbs(hif_dev);
891err_fw_download:
fb9987d0
S		 892 release_firmware(hif_dev->firmware);
893err_fw_req:
894 hif_dev->firmware = NULL;
895 return ret;
896}
897
fb9987d0
S		 898static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev)
899{
900 ath9k_hif_usb_dealloc_urbs(hif_dev);
901 if (hif_dev->firmware)
902 release_firmware(hif_dev->firmware);
903}
904
905static int ath9k_hif_usb_probe(struct usb_interface *interface,
906 const struct usb_device_id *id)
907{
908 struct usb_device *udev = interface_to_usbdev(interface);
909 struct hif_device_usb *hif_dev;
fb9987d0
S		 910 int ret = 0;
911
912 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL);
913 if (!hif_dev) {
914 ret = -ENOMEM;
915 goto err_alloc;
916 }
917
918 usb_get_dev(udev);
919 hif_dev->udev = udev;
920 hif_dev->interface = interface;
921 hif_dev->device_id = id->idProduct;
922#ifdef CONFIG_PM
923 udev->reset_resume = 1;
924#endif
925 usb_set_intfdata(interface, hif_dev);
926
47fce026
SM		 927 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb,
928 &hif_dev->udev->dev);
929 if (hif_dev->htc_handle == NULL) {
930 ret = -ENOMEM;
931 goto err_htc_hw_alloc;
932 }
933
ce43cee5
S		 934 /* Find out which firmware to load */
935
0b5ead91 936 if (IS_AR7010_DEVICE(id->driver_info))
b1762862 937 if (le16_to_cpu(udev->descriptor.bcdDevice) == 0x0202)
d0ee0ebe 938 hif_dev->fw_name = FIRMWARE_AR7010_1_1;
b1762862 939 else
d0ee0ebe 940 hif_dev->fw_name = FIRMWARE_AR7010;
fa6e15e0 941 else
d0ee0ebe 942 hif_dev->fw_name = FIRMWARE_AR9271;
ce43cee5 943
fa6e15e0 944 ret = ath9k_hif_usb_dev_init(hif_dev, id->driver_info);
fb9987d0
S		 945 if (ret) {
946 ret = -EINVAL;
947 goto err_hif_init_usb;
948 }
949
47fce026 950 ret = ath9k_htc_hw_init(hif_dev->htc_handle,
21cb9879 951 &hif_dev->udev->dev, hif_dev->device_id,
fa6e15e0 952 hif_dev->udev->product, id->driver_info);
fb9987d0
S		 953 if (ret) {
954 ret = -EINVAL;
955 goto err_htc_hw_init;
956 }
957
958 dev_info(&hif_dev->udev->dev, "ath9k_htc: USB layer initialized\n");
959
960 return 0;
961
962err_htc_hw_init:
fb9987d0
S		 963 ath9k_hif_usb_dev_deinit(hif_dev);
964err_hif_init_usb:
47fce026
SM		 965 ath9k_htc_hw_free(hif_dev->htc_handle);
966err_htc_hw_alloc:
fb9987d0
S		 967 usb_set_intfdata(interface, NULL);
968 kfree(hif_dev);
969 usb_put_dev(udev);
970err_alloc:
971 return ret;
972}
973
62e4716a
S		 974static void ath9k_hif_usb_reboot(struct usb_device *udev)
975{
976 u32 reboot_cmd = 0xffffffff;
977 void *buf;
978 int ret;
979
a465a2cc 980 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL);
62e4716a
S		 981 if (!buf)
982 return;
983
62e4716a
S		 984 ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, USB_REG_OUT_PIPE),
985 buf, 4, NULL, HZ);
986 if (ret)
987 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
988
989 kfree(buf);
990}
991
fb9987d0
S		 992static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
993{
994 struct usb_device *udev = interface_to_usbdev(interface);
b2767363 995 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
fb9987d0
S		 996
997 if (hif_dev) {
d8f996f6
S		 998 ath9k_htc_hw_deinit(hif_dev->htc_handle,
999 (udev->state == USB_STATE_NOTATTACHED) ? true : false);
fb9987d0
S		 1000 ath9k_htc_hw_free(hif_dev->htc_handle);
1001 ath9k_hif_usb_dev_deinit(hif_dev);
1002 usb_set_intfdata(interface, NULL);
1003 }
1004
1005 if (hif_dev->flags & HIF_USB_START)
62e4716a 1006 ath9k_hif_usb_reboot(udev);
fb9987d0
S		 1007
1008 kfree(hif_dev);
1009 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");
1010 usb_put_dev(udev);
1011}
1012
1013#ifdef CONFIG_PM
1014static int ath9k_hif_usb_suspend(struct usb_interface *interface,
1015 pm_message_t message)
1016{
b2767363 1017 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
fb9987d0 1018
f933ebed
SM		 1019 /*
1020 * The device has to be set to FULLSLEEP mode in case no
1021 * interface is up.
1022 */
1023 if (!(hif_dev->flags & HIF_USB_START))
1024 ath9k_htc_suspend(hif_dev->htc_handle);
1025
fb9987d0
S		 1026 ath9k_hif_usb_dealloc_urbs(hif_dev);
1027
1028 return 0;
1029}
1030
1031static int ath9k_hif_usb_resume(struct usb_interface *interface)
1032{
b2767363 1033 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
fa6e15e0 1034 struct htc_target *htc_handle = hif_dev->htc_handle;
fb9987d0
S		 1035 int ret;
1036
1037 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1038 if (ret)
1039 return ret;
1040
1041 if (hif_dev->firmware) {
fa6e15e0 1042 ret = ath9k_hif_usb_download_fw(hif_dev,
0b5ead91 1043 htc_handle->drv_priv->ah->hw_version.usbdev);
fb9987d0
S		 1044 if (ret)
1045 goto fail_resume;
1046 } else {
1047 ath9k_hif_usb_dealloc_urbs(hif_dev);
1048 return -EIO;
1049 }
1050
1051 mdelay(100);
1052
fa6e15e0 1053 ret = ath9k_htc_resume(htc_handle);
fb9987d0
S		 1054
1055 if (ret)
1056 goto fail_resume;
1057
1058 return 0;
1059
1060fail_resume:
1061 ath9k_hif_usb_dealloc_urbs(hif_dev);
1062
1063 return ret;
1064}
1065#endif
1066
1067static struct usb_driver ath9k_hif_usb_driver = {
1068 .name = "ath9k_hif_usb",
1069 .probe = ath9k_hif_usb_probe,
1070 .disconnect = ath9k_hif_usb_disconnect,
1071#ifdef CONFIG_PM
1072 .suspend = ath9k_hif_usb_suspend,
1073 .resume = ath9k_hif_usb_resume,
1074 .reset_resume = ath9k_hif_usb_resume,
1075#endif
1076 .id_table = ath9k_hif_usb_ids,
1077 .soft_unbind = 1,
1078};
1079
1080int ath9k_hif_usb_init(void)
1081{
1082 return usb_register(&ath9k_hif_usb_driver);
1083}
1084
1085void ath9k_hif_usb_exit(void)
1086{
1087 usb_deregister(&ath9k_hif_usb_driver);
1088}
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