2 * Copyright (c) 2010-2011 Atheros Communications Inc.
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.
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.
17 #include <asm/unaligned.h>
20 /* identify firmware images */
21 #define FIRMWARE_AR7010_1_1 "htc_7010.fw"
22 #define FIRMWARE_AR9271 "htc_9271.fw"
24 MODULE_FIRMWARE(FIRMWARE_AR7010_1_1);
25 MODULE_FIRMWARE(FIRMWARE_AR9271);
27 static struct usb_device_id ath9k_hif_usb_ids[] = {
28 { USB_DEVICE(0x0cf3, 0x9271) }, /* Atheros */
29 { USB_DEVICE(0x0cf3, 0x1006) }, /* Atheros */
30 { USB_DEVICE(0x0846, 0x9030) }, /* Netgear N150 */
31 { USB_DEVICE(0x07D1, 0x3A10) }, /* Dlink Wireless 150 */
32 { USB_DEVICE(0x13D3, 0x3327) }, /* Azurewave */
33 { USB_DEVICE(0x13D3, 0x3328) }, /* Azurewave */
34 { USB_DEVICE(0x13D3, 0x3346) }, /* IMC Networks */
35 { USB_DEVICE(0x13D3, 0x3348) }, /* Azurewave */
36 { USB_DEVICE(0x13D3, 0x3349) }, /* Azurewave */
37 { USB_DEVICE(0x13D3, 0x3350) }, /* Azurewave */
38 { USB_DEVICE(0x04CA, 0x4605) }, /* Liteon */
39 { USB_DEVICE(0x040D, 0x3801) }, /* VIA */
40 { USB_DEVICE(0x0cf3, 0xb003) }, /* Ubiquiti WifiStation Ext */
41 { USB_DEVICE(0x0cf3, 0xb002) }, /* Ubiquiti WifiStation */
42 { USB_DEVICE(0x057c, 0x8403) }, /* AVM FRITZ!WLAN 11N v2 USB */
44 { USB_DEVICE(0x0cf3, 0x7015),
45 .driver_info = AR9287_USB }, /* Atheros */
46 { USB_DEVICE(0x1668, 0x1200),
47 .driver_info = AR9287_USB }, /* Verizon */
49 { USB_DEVICE(0x0cf3, 0x7010),
50 .driver_info = AR9280_USB }, /* Atheros */
51 { USB_DEVICE(0x0846, 0x9018),
52 .driver_info = AR9280_USB }, /* Netgear WNDA3200 */
53 { USB_DEVICE(0x083A, 0xA704),
54 .driver_info = AR9280_USB }, /* SMC Networks */
55 { USB_DEVICE(0x0411, 0x017f),
56 .driver_info = AR9280_USB }, /* Sony UWA-BR100 */
57 { USB_DEVICE(0x04da, 0x3904),
58 .driver_info = AR9280_USB },
60 { USB_DEVICE(0x0cf3, 0x20ff),
61 .driver_info = STORAGE_DEVICE },
66 MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids);
68 static int __hif_usb_tx(struct hif_device_usb *hif_dev);
70 static void hif_usb_regout_cb(struct urb *urb)
72 struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
74 switch (urb->status) {
87 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
98 static int hif_usb_send_regout(struct hif_device_usb *hif_dev,
105 urb = usb_alloc_urb(0, GFP_KERNEL);
109 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
116 cmd->hif_dev = hif_dev;
118 usb_fill_bulk_urb(urb, hif_dev->udev,
119 usb_sndbulkpipe(hif_dev->udev, USB_REG_OUT_PIPE),
121 hif_usb_regout_cb, cmd);
123 usb_anchor_urb(urb, &hif_dev->regout_submitted);
124 ret = usb_submit_urb(urb, GFP_KERNEL);
126 usb_unanchor_urb(urb);
134 static void hif_usb_mgmt_cb(struct urb *urb)
136 struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
137 struct hif_device_usb *hif_dev;
140 if (!cmd || !cmd->skb || !cmd->hif_dev)
143 hif_dev = cmd->hif_dev;
145 switch (urb->status) {
155 * If the URBs are being flushed, no need to complete
158 spin_lock(&hif_dev->tx.tx_lock);
159 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) {
160 spin_unlock(&hif_dev->tx.tx_lock);
161 dev_kfree_skb_any(cmd->skb);
165 spin_unlock(&hif_dev->tx.tx_lock);
173 skb_pull(cmd->skb, 4);
174 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
179 static int hif_usb_send_mgmt(struct hif_device_usb *hif_dev,
187 urb = usb_alloc_urb(0, GFP_ATOMIC);
191 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
198 cmd->hif_dev = hif_dev;
200 hdr = (__le16 *) skb_push(skb, 4);
201 *hdr++ = cpu_to_le16(skb->len - 4);
202 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG);
204 usb_fill_bulk_urb(urb, hif_dev->udev,
205 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
207 hif_usb_mgmt_cb, cmd);
209 usb_anchor_urb(urb, &hif_dev->mgmt_submitted);
210 ret = usb_submit_urb(urb, GFP_ATOMIC);
212 usb_unanchor_urb(urb);
220 static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev,
221 struct sk_buff_head *list)
225 while ((skb = __skb_dequeue(list)) != NULL) {
226 dev_kfree_skb_any(skb);
230 static inline void ath9k_skb_queue_complete(struct hif_device_usb *hif_dev,
231 struct sk_buff_head *queue,
236 while ((skb = __skb_dequeue(queue)) != NULL) {
237 #ifdef CONFIG_ATH9K_HTC_DEBUGFS
240 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
243 TX_STAT_INC(skb_success);
244 TX_STAT_ADD(skb_success_bytes, ln);
247 TX_STAT_INC(skb_failed);
251 static void hif_usb_tx_cb(struct urb *urb)
253 struct tx_buf *tx_buf = (struct tx_buf *) urb->context;
254 struct hif_device_usb *hif_dev;
257 if (!tx_buf || !tx_buf->hif_dev)
260 hif_dev = tx_buf->hif_dev;
262 switch (urb->status) {
272 * If the URBs are being flushed, no need to add this
273 * URB to the free list.
275 spin_lock(&hif_dev->tx.tx_lock);
276 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) {
277 spin_unlock(&hif_dev->tx.tx_lock);
278 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
281 spin_unlock(&hif_dev->tx.tx_lock);
289 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, txok);
291 /* Re-initialize the SKB queue */
292 tx_buf->len = tx_buf->offset = 0;
293 __skb_queue_head_init(&tx_buf->skb_queue);
295 /* Add this TX buffer to the free list */
296 spin_lock(&hif_dev->tx.tx_lock);
297 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
298 hif_dev->tx.tx_buf_cnt++;
299 if (!(hif_dev->tx.flags & HIF_USB_TX_STOP))
300 __hif_usb_tx(hif_dev); /* Check for pending SKBs */
301 TX_STAT_INC(buf_completed);
302 spin_unlock(&hif_dev->tx.tx_lock);
305 /* TX lock has to be taken */
306 static int __hif_usb_tx(struct hif_device_usb *hif_dev)
308 struct tx_buf *tx_buf = NULL;
309 struct sk_buff *nskb = NULL;
315 if (hif_dev->tx.tx_skb_cnt == 0)
318 /* Check if a free TX buffer is available */
319 if (list_empty(&hif_dev->tx.tx_buf))
322 tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list);
323 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending);
324 hif_dev->tx.tx_buf_cnt--;
326 tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM);
328 for (i = 0; i < tx_skb_cnt; i++) {
329 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue);
331 /* Should never be NULL */
334 hif_dev->tx.tx_skb_cnt--;
337 buf += tx_buf->offset;
339 *hdr++ = cpu_to_le16(nskb->len);
340 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG);
342 memcpy(buf, nskb->data, nskb->len);
343 tx_buf->len = nskb->len + 4;
345 if (i < (tx_skb_cnt - 1))
346 tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4;
348 if (i == (tx_skb_cnt - 1))
349 tx_buf->len += tx_buf->offset;
351 __skb_queue_tail(&tx_buf->skb_queue, nskb);
352 TX_STAT_INC(skb_queued);
355 usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev,
356 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
357 tx_buf->buf, tx_buf->len,
358 hif_usb_tx_cb, tx_buf);
360 ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC);
362 tx_buf->len = tx_buf->offset = 0;
363 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, false);
364 __skb_queue_head_init(&tx_buf->skb_queue);
365 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
366 hif_dev->tx.tx_buf_cnt++;
370 TX_STAT_INC(buf_queued);
375 static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb)
377 struct ath9k_htc_tx_ctl *tx_ctl;
381 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
383 if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
384 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
388 /* Check if the max queue count has been reached */
389 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) {
390 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
394 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
396 tx_ctl = HTC_SKB_CB(skb);
398 /* Mgmt/Beacon frames don't use the TX buffer pool */
399 if ((tx_ctl->type == ATH9K_HTC_MGMT) ||
400 (tx_ctl->type == ATH9K_HTC_BEACON)) {
401 ret = hif_usb_send_mgmt(hif_dev, skb);
404 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
406 if ((tx_ctl->type == ATH9K_HTC_NORMAL) ||
407 (tx_ctl->type == ATH9K_HTC_AMPDU)) {
408 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb);
409 hif_dev->tx.tx_skb_cnt++;
412 /* Check if AMPDUs have to be sent immediately */
413 if ((hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) &&
414 (hif_dev->tx.tx_skb_cnt < 2)) {
415 __hif_usb_tx(hif_dev);
418 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
423 static void hif_usb_start(void *hif_handle)
425 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
428 hif_dev->flags |= HIF_USB_START;
430 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
431 hif_dev->tx.flags &= ~HIF_USB_TX_STOP;
432 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
435 static void hif_usb_stop(void *hif_handle)
437 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
438 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
441 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
442 ath9k_skb_queue_complete(hif_dev, &hif_dev->tx.tx_skb_queue, false);
443 hif_dev->tx.tx_skb_cnt = 0;
444 hif_dev->tx.flags |= HIF_USB_TX_STOP;
445 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
447 /* The pending URBs have to be canceled. */
448 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
449 &hif_dev->tx.tx_pending, list) {
450 usb_kill_urb(tx_buf->urb);
453 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
456 static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb)
458 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
462 case USB_WLAN_TX_PIPE:
463 ret = hif_usb_send_tx(hif_dev, skb);
465 case USB_REG_OUT_PIPE:
466 ret = hif_usb_send_regout(hif_dev, skb);
469 dev_err(&hif_dev->udev->dev,
470 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id);
478 static inline bool check_index(struct sk_buff *skb, u8 idx)
480 struct ath9k_htc_tx_ctl *tx_ctl;
482 tx_ctl = HTC_SKB_CB(skb);
484 if ((tx_ctl->type == ATH9K_HTC_AMPDU) &&
485 (tx_ctl->sta_idx == idx))
491 static void hif_usb_sta_drain(void *hif_handle, u8 idx)
493 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
494 struct sk_buff *skb, *tmp;
497 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
499 skb_queue_walk_safe(&hif_dev->tx.tx_skb_queue, skb, tmp) {
500 if (check_index(skb, idx)) {
501 __skb_unlink(skb, &hif_dev->tx.tx_skb_queue);
502 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
504 hif_dev->tx.tx_skb_cnt--;
505 TX_STAT_INC(skb_failed);
509 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
512 static struct ath9k_htc_hif hif_usb = {
513 .transport = ATH9K_HIF_USB,
514 .name = "ath9k_hif_usb",
516 .control_ul_pipe = USB_REG_OUT_PIPE,
517 .control_dl_pipe = USB_REG_IN_PIPE,
519 .start = hif_usb_start,
520 .stop = hif_usb_stop,
521 .sta_drain = hif_usb_sta_drain,
522 .send = hif_usb_send,
525 static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev,
528 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER];
529 int index = 0, i = 0, len = skb->len;
530 int rx_remain_len, rx_pkt_len;
534 spin_lock(&hif_dev->rx_lock);
536 rx_remain_len = hif_dev->rx_remain_len;
537 rx_pkt_len = hif_dev->rx_transfer_len;
539 if (rx_remain_len != 0) {
540 struct sk_buff *remain_skb = hif_dev->remain_skb;
543 ptr = (u8 *) remain_skb->data;
545 index = rx_remain_len;
546 rx_remain_len -= hif_dev->rx_pad_len;
549 memcpy(ptr, skb->data, rx_remain_len);
551 rx_pkt_len += rx_remain_len;
552 hif_dev->rx_remain_len = 0;
553 skb_put(remain_skb, rx_pkt_len);
555 skb_pool[pool_index++] = remain_skb;
558 index = rx_remain_len;
562 spin_unlock(&hif_dev->rx_lock);
564 while (index < len) {
570 ptr = (u8 *) skb->data;
572 pkt_len = get_unaligned_le16(ptr + index);
573 pkt_tag = get_unaligned_le16(ptr + index + 2);
575 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) {
576 RX_STAT_INC(skb_dropped);
580 pad_len = 4 - (pkt_len & 0x3);
585 index = index + 4 + pkt_len + pad_len;
587 if (index > MAX_RX_BUF_SIZE) {
588 spin_lock(&hif_dev->rx_lock);
589 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE;
590 hif_dev->rx_transfer_len =
591 MAX_RX_BUF_SIZE - chk_idx - 4;
592 hif_dev->rx_pad_len = pad_len;
594 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
596 dev_err(&hif_dev->udev->dev,
597 "ath9k_htc: RX memory allocation error\n");
598 spin_unlock(&hif_dev->rx_lock);
601 skb_reserve(nskb, 32);
602 RX_STAT_INC(skb_allocated);
604 memcpy(nskb->data, &(skb->data[chk_idx+4]),
605 hif_dev->rx_transfer_len);
607 /* Record the buffer pointer */
608 hif_dev->remain_skb = nskb;
609 spin_unlock(&hif_dev->rx_lock);
611 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
613 dev_err(&hif_dev->udev->dev,
614 "ath9k_htc: RX memory allocation error\n");
617 skb_reserve(nskb, 32);
618 RX_STAT_INC(skb_allocated);
620 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len);
621 skb_put(nskb, pkt_len);
622 skb_pool[pool_index++] = nskb;
627 for (i = 0; i < pool_index; i++) {
628 RX_STAT_ADD(skb_completed_bytes, skb_pool[i]->len);
629 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i],
630 skb_pool[i]->len, USB_WLAN_RX_PIPE);
631 RX_STAT_INC(skb_completed);
635 static void ath9k_hif_usb_rx_cb(struct urb *urb)
637 struct sk_buff *skb = (struct sk_buff *) urb->context;
638 struct hif_device_usb *hif_dev =
639 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
648 switch (urb->status) {
660 if (likely(urb->actual_length != 0)) {
661 skb_put(skb, urb->actual_length);
662 ath9k_hif_usb_rx_stream(hif_dev, skb);
666 skb_reset_tail_pointer(skb);
669 usb_anchor_urb(urb, &hif_dev->rx_submitted);
670 ret = usb_submit_urb(urb, GFP_ATOMIC);
672 usb_unanchor_urb(urb);
681 static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
683 struct sk_buff *skb = (struct sk_buff *) urb->context;
684 struct sk_buff *nskb;
685 struct hif_device_usb *hif_dev =
686 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
695 switch (urb->status) {
704 skb_reset_tail_pointer(skb);
710 if (likely(urb->actual_length != 0)) {
711 skb_put(skb, urb->actual_length);
713 /* Process the command first */
714 ath9k_htc_rx_msg(hif_dev->htc_handle, skb,
715 skb->len, USB_REG_IN_PIPE);
718 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC);
720 dev_err(&hif_dev->udev->dev,
721 "ath9k_htc: REG_IN memory allocation failure\n");
726 usb_fill_bulk_urb(urb, hif_dev->udev,
727 usb_rcvbulkpipe(hif_dev->udev,
729 nskb->data, MAX_REG_IN_BUF_SIZE,
730 ath9k_hif_usb_reg_in_cb, nskb);
734 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
735 ret = usb_submit_urb(urb, GFP_ATOMIC);
737 usb_unanchor_urb(urb);
747 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
749 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
752 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
753 &hif_dev->tx.tx_buf, list) {
754 usb_kill_urb(tx_buf->urb);
755 list_del(&tx_buf->list);
756 usb_free_urb(tx_buf->urb);
761 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
762 hif_dev->tx.flags |= HIF_USB_TX_FLUSH;
763 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
765 list_for_each_entry_safe(tx_buf, tx_buf_tmp,
766 &hif_dev->tx.tx_pending, list) {
767 usb_kill_urb(tx_buf->urb);
768 list_del(&tx_buf->list);
769 usb_free_urb(tx_buf->urb);
774 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
777 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev)
779 struct tx_buf *tx_buf;
782 INIT_LIST_HEAD(&hif_dev->tx.tx_buf);
783 INIT_LIST_HEAD(&hif_dev->tx.tx_pending);
784 spin_lock_init(&hif_dev->tx.tx_lock);
785 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue);
786 init_usb_anchor(&hif_dev->mgmt_submitted);
788 for (i = 0; i < MAX_TX_URB_NUM; i++) {
789 tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL);
793 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL);
797 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL);
801 tx_buf->hif_dev = hif_dev;
802 __skb_queue_head_init(&tx_buf->skb_queue);
804 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
807 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM;
815 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
819 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev)
821 usb_kill_anchored_urbs(&hif_dev->rx_submitted);
824 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
826 struct urb *urb = NULL;
827 struct sk_buff *skb = NULL;
830 init_usb_anchor(&hif_dev->rx_submitted);
831 spin_lock_init(&hif_dev->rx_lock);
833 for (i = 0; i < MAX_RX_URB_NUM; i++) {
836 urb = usb_alloc_urb(0, GFP_KERNEL);
842 /* Allocate buffer */
843 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL);
849 usb_fill_bulk_urb(urb, hif_dev->udev,
850 usb_rcvbulkpipe(hif_dev->udev,
852 skb->data, MAX_RX_BUF_SIZE,
853 ath9k_hif_usb_rx_cb, skb);
856 usb_anchor_urb(urb, &hif_dev->rx_submitted);
859 ret = usb_submit_urb(urb, GFP_KERNEL);
861 usb_unanchor_urb(urb);
866 * Drop reference count.
867 * This ensures that the URB is freed when killing them.
879 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
883 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev)
885 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted);
888 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev)
890 struct urb *urb = NULL;
891 struct sk_buff *skb = NULL;
894 init_usb_anchor(&hif_dev->reg_in_submitted);
896 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) {
899 urb = usb_alloc_urb(0, GFP_KERNEL);
905 /* Allocate buffer */
906 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL);
912 usb_fill_bulk_urb(urb, hif_dev->udev,
913 usb_rcvbulkpipe(hif_dev->udev,
915 skb->data, MAX_REG_IN_BUF_SIZE,
916 ath9k_hif_usb_reg_in_cb, skb);
919 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
922 ret = usb_submit_urb(urb, GFP_KERNEL);
924 usb_unanchor_urb(urb);
929 * Drop reference count.
930 * This ensures that the URB is freed when killing them.
942 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
946 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev)
949 init_usb_anchor(&hif_dev->regout_submitted);
952 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0)
956 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0)
960 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0)
965 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
967 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
972 static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev)
974 usb_kill_anchored_urbs(&hif_dev->regout_submitted);
975 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
976 ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
977 ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
980 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev)
983 const void *data = hif_dev->fw_data;
984 size_t len = hif_dev->fw_size;
985 u32 addr = AR9271_FIRMWARE;
986 u8 *buf = kzalloc(4096, GFP_KERNEL);
993 transfer = min_t(size_t, len, 4096);
994 memcpy(buf, data, transfer);
996 err = usb_control_msg(hif_dev->udev,
997 usb_sndctrlpipe(hif_dev->udev, 0),
998 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT,
999 addr >> 8, 0, buf, transfer, HZ);
1011 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
1012 firm_offset = AR7010_FIRMWARE_TEXT;
1014 firm_offset = AR9271_FIRMWARE_TEXT;
1017 * Issue FW download complete command to firmware.
1019 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0),
1020 FIRMWARE_DOWNLOAD_COMP,
1022 firm_offset >> 8, 0, NULL, 0, HZ);
1026 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n",
1027 hif_dev->fw_name, (unsigned long) hif_dev->fw_size);
1032 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev)
1034 struct usb_host_interface *alt = &hif_dev->interface->altsetting[0];
1035 struct usb_endpoint_descriptor *endp;
1038 ret = ath9k_hif_usb_download_fw(hif_dev);
1040 dev_err(&hif_dev->udev->dev,
1041 "ath9k_htc: Firmware - %s download failed\n",
1046 /* On downloading the firmware to the target, the USB descriptor of EP4
1047 * is 'patched' to change the type of the endpoint to Bulk. This will
1048 * bring down CPU usage during the scan period.
1050 for (idx = 0; idx < alt->desc.bNumEndpoints; idx++) {
1051 endp = &alt->endpoint[idx].desc;
1052 if ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1053 == USB_ENDPOINT_XFER_INT) {
1054 endp->bmAttributes &= ~USB_ENDPOINT_XFERTYPE_MASK;
1055 endp->bmAttributes |= USB_ENDPOINT_XFER_BULK;
1056 endp->bInterval = 0;
1061 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1063 dev_err(&hif_dev->udev->dev,
1064 "ath9k_htc: Unable to allocate URBs\n");
1071 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev)
1073 ath9k_hif_usb_dealloc_urbs(hif_dev);
1077 * If initialization fails or the FW cannot be retrieved,
1078 * detach the device.
1080 static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev)
1082 struct device *dev = &hif_dev->udev->dev;
1083 struct device *parent = dev->parent;
1085 complete(&hif_dev->fw_done);
1088 device_lock(parent);
1090 device_release_driver(dev);
1093 device_unlock(parent);
1096 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context)
1098 struct hif_device_usb *hif_dev = context;
1102 dev_err(&hif_dev->udev->dev,
1103 "ath9k_htc: Failed to get firmware %s\n",
1108 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb,
1109 &hif_dev->udev->dev);
1110 if (hif_dev->htc_handle == NULL)
1113 hif_dev->fw_data = fw->data;
1114 hif_dev->fw_size = fw->size;
1116 /* Proceed with initialization */
1118 ret = ath9k_hif_usb_dev_init(hif_dev);
1122 ret = ath9k_htc_hw_init(hif_dev->htc_handle,
1123 &hif_dev->interface->dev,
1124 hif_dev->usb_device_id->idProduct,
1125 hif_dev->udev->product,
1126 hif_dev->usb_device_id->driver_info);
1129 goto err_htc_hw_init;
1132 release_firmware(fw);
1133 hif_dev->flags |= HIF_USB_READY;
1134 complete(&hif_dev->fw_done);
1139 ath9k_hif_usb_dev_deinit(hif_dev);
1141 ath9k_htc_hw_free(hif_dev->htc_handle);
1143 release_firmware(fw);
1145 ath9k_hif_usb_firmware_fail(hif_dev);
1149 * An exact copy of the function from zd1211rw.
1151 static int send_eject_command(struct usb_interface *interface)
1153 struct usb_device *udev = interface_to_usbdev(interface);
1154 struct usb_host_interface *iface_desc = &interface->altsetting[0];
1155 struct usb_endpoint_descriptor *endpoint;
1160 /* Find bulk out endpoint */
1161 for (r = 1; r >= 0; r--) {
1162 endpoint = &iface_desc->endpoint[r].desc;
1163 if (usb_endpoint_dir_out(endpoint) &&
1164 usb_endpoint_xfer_bulk(endpoint)) {
1165 bulk_out_ep = endpoint->bEndpointAddress;
1171 "ath9k_htc: Could not find bulk out endpoint\n");
1175 cmd = kzalloc(31, GFP_KERNEL);
1179 /* USB bulk command block */
1180 cmd[0] = 0x55; /* bulk command signature */
1181 cmd[1] = 0x53; /* bulk command signature */
1182 cmd[2] = 0x42; /* bulk command signature */
1183 cmd[3] = 0x43; /* bulk command signature */
1184 cmd[14] = 6; /* command length */
1186 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
1187 cmd[19] = 0x2; /* eject disc */
1189 dev_info(&udev->dev, "Ejecting storage device...\n");
1190 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
1191 cmd, 31, NULL, 2000);
1196 /* At this point, the device disconnects and reconnects with the real
1199 usb_set_intfdata(interface, NULL);
1203 static int ath9k_hif_usb_probe(struct usb_interface *interface,
1204 const struct usb_device_id *id)
1206 struct usb_device *udev = interface_to_usbdev(interface);
1207 struct hif_device_usb *hif_dev;
1210 if (id->driver_info == STORAGE_DEVICE)
1211 return send_eject_command(interface);
1213 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL);
1221 hif_dev->udev = udev;
1222 hif_dev->interface = interface;
1223 hif_dev->usb_device_id = id;
1225 udev->reset_resume = 1;
1227 usb_set_intfdata(interface, hif_dev);
1229 init_completion(&hif_dev->fw_done);
1231 /* Find out which firmware to load */
1233 if (IS_AR7010_DEVICE(id->driver_info))
1234 hif_dev->fw_name = FIRMWARE_AR7010_1_1;
1236 hif_dev->fw_name = FIRMWARE_AR9271;
1238 ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name,
1239 &hif_dev->udev->dev, GFP_KERNEL,
1240 hif_dev, ath9k_hif_usb_firmware_cb);
1242 dev_err(&hif_dev->udev->dev,
1243 "ath9k_htc: Async request for firmware %s failed\n",
1248 dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n",
1254 usb_set_intfdata(interface, NULL);
1261 static void ath9k_hif_usb_reboot(struct usb_device *udev)
1263 u32 reboot_cmd = 0xffffffff;
1267 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL);
1271 ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, USB_REG_OUT_PIPE),
1274 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
1279 static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
1281 struct usb_device *udev = interface_to_usbdev(interface);
1282 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1283 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false;
1288 wait_for_completion(&hif_dev->fw_done);
1290 if (hif_dev->flags & HIF_USB_READY) {
1291 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged);
1292 ath9k_htc_hw_free(hif_dev->htc_handle);
1293 ath9k_hif_usb_dev_deinit(hif_dev);
1296 usb_set_intfdata(interface, NULL);
1298 if (!unplugged && (hif_dev->flags & HIF_USB_START))
1299 ath9k_hif_usb_reboot(udev);
1302 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");
1307 static int ath9k_hif_usb_suspend(struct usb_interface *interface,
1308 pm_message_t message)
1310 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1313 * The device has to be set to FULLSLEEP mode in case no
1316 if (!(hif_dev->flags & HIF_USB_START))
1317 ath9k_htc_suspend(hif_dev->htc_handle);
1319 ath9k_hif_usb_dealloc_urbs(hif_dev);
1324 static int ath9k_hif_usb_resume(struct usb_interface *interface)
1326 struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1327 struct htc_target *htc_handle = hif_dev->htc_handle;
1329 const struct firmware *fw;
1331 ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1335 if (hif_dev->flags & HIF_USB_READY) {
1336 /* request cached firmware during suspend/resume cycle */
1337 ret = request_firmware(&fw, hif_dev->fw_name,
1338 &hif_dev->udev->dev);
1342 hif_dev->fw_data = fw->data;
1343 hif_dev->fw_size = fw->size;
1344 ret = ath9k_hif_usb_download_fw(hif_dev);
1345 release_firmware(fw);
1349 ath9k_hif_usb_dealloc_urbs(hif_dev);
1355 ret = ath9k_htc_resume(htc_handle);
1363 ath9k_hif_usb_dealloc_urbs(hif_dev);
1369 static struct usb_driver ath9k_hif_usb_driver = {
1370 .name = KBUILD_MODNAME,
1371 .probe = ath9k_hif_usb_probe,
1372 .disconnect = ath9k_hif_usb_disconnect,
1374 .suspend = ath9k_hif_usb_suspend,
1375 .resume = ath9k_hif_usb_resume,
1376 .reset_resume = ath9k_hif_usb_resume,
1378 .id_table = ath9k_hif_usb_ids,
1380 .disable_hub_initiated_lpm = 1,
1383 int ath9k_hif_usb_init(void)
1385 return usb_register(&ath9k_hif_usb_driver);
1388 void ath9k_hif_usb_exit(void)
1390 usb_deregister(&ath9k_hif_usb_driver);