2 * Atheros CARL9170 driver
6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2009, 2010, Christian Lamparter <chunkeey@googlemail.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; see the file COPYING. If not, see
21 * http://www.gnu.org/licenses/.
23 * This file incorporates work covered by the following copyright and
25 * Copyright (c) 2007-2008 Atheros Communications, Inc.
27 * Permission to use, copy, modify, and/or distribute this software for any
28 * purpose with or without fee is hereby granted, provided that the above
29 * copyright notice and this permission notice appear in all copies.
31 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
32 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
33 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
34 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
35 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
36 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
37 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
40 #include <linux/module.h>
41 #include <linux/slab.h>
42 #include <linux/usb.h>
43 #include <linux/firmware.h>
44 #include <linux/etherdevice.h>
45 #include <linux/device.h>
46 #include <net/mac80211.h>
52 MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
53 MODULE_AUTHOR("Christian Lamparter <chunkeey@googlemail.com>");
54 MODULE_LICENSE("GPL");
55 MODULE_DESCRIPTION("Atheros AR9170 802.11n USB wireless");
56 MODULE_FIRMWARE(CARL9170FW_NAME);
57 MODULE_ALIAS("ar9170usb");
58 MODULE_ALIAS("arusb_lnx");
63 * Always update our wiki's device list (located at:
64 * http://wireless.kernel.org/en/users/Drivers/ar9170/devices ),
65 * whenever you add a new device.
67 static const struct usb_device_id carl9170_usb_ids[] = {
69 { USB_DEVICE(0x0cf3, 0x9170) },
71 { USB_DEVICE(0x0cf3, 0x1001) },
72 /* TP-Link TL-WN821N v2 */
73 { USB_DEVICE(0x0cf3, 0x1002), .driver_info = CARL9170_WPS_BUTTON |
75 /* 3Com Dual Band 802.11n USB Adapter */
76 { USB_DEVICE(0x0cf3, 0x1010) },
77 /* H3C Dual Band 802.11n USB Adapter */
78 { USB_DEVICE(0x0cf3, 0x1011) },
80 { USB_DEVICE(0xcace, 0x0300) },
81 /* D-Link DWA 160 A1 */
82 { USB_DEVICE(0x07d1, 0x3c10) },
83 /* D-Link DWA 160 A2 */
84 { USB_DEVICE(0x07d1, 0x3a09) },
85 /* D-Link DWA 130 D */
86 { USB_DEVICE(0x07d1, 0x3a0f) },
88 { USB_DEVICE(0x0846, 0x9040) },
89 /* Netgear WNDA3100 (v1) */
90 { USB_DEVICE(0x0846, 0x9010) },
91 /* Netgear WN111 v2 */
92 { USB_DEVICE(0x0846, 0x9001), .driver_info = CARL9170_ONE_LED },
94 { USB_DEVICE(0x0ace, 0x1221) },
95 /* Proxim ORiNOCO 802.11n USB */
96 { USB_DEVICE(0x1435, 0x0804) },
97 /* WNC Generic 11n USB Dongle */
98 { USB_DEVICE(0x1435, 0x0326) },
100 { USB_DEVICE(0x0586, 0x3417) },
102 { USB_DEVICE(0x0cde, 0x0023) },
104 { USB_DEVICE(0x0cde, 0x0026) },
105 /* Sphairon Homelink 1202 */
106 { USB_DEVICE(0x0cde, 0x0027) },
107 /* Arcadyan WN7512 */
108 { USB_DEVICE(0x083a, 0xf522) },
110 { USB_DEVICE(0x2019, 0x5304) },
111 /* IO-Data WNGDNUS2 */
112 { USB_DEVICE(0x04bb, 0x093f) },
114 { USB_DEVICE(0x0409, 0x0249) },
116 { USB_DEVICE(0x0409, 0x02b4) },
117 /* AVM FRITZ!WLAN USB Stick N */
118 { USB_DEVICE(0x057c, 0x8401) },
119 /* AVM FRITZ!WLAN USB Stick N 2.4 */
120 { USB_DEVICE(0x057c, 0x8402) },
121 /* Qwest/Actiontec 802AIN Wireless N USB Network Adapter */
122 { USB_DEVICE(0x1668, 0x1200) },
123 /* Airlive X.USB a/b/g/n */
124 { USB_DEVICE(0x1b75, 0x9170) },
129 MODULE_DEVICE_TABLE(usb, carl9170_usb_ids);
131 static struct usb_driver carl9170_driver;
133 static void carl9170_usb_submit_data_urb(struct ar9170 *ar)
138 if (atomic_inc_return(&ar->tx_anch_urbs) > AR9170_NUM_TX_URBS)
141 urb = usb_get_from_anchor(&ar->tx_wait);
145 usb_anchor_urb(urb, &ar->tx_anch);
147 err = usb_submit_urb(urb, GFP_ATOMIC);
149 if (net_ratelimit()) {
150 dev_err(&ar->udev->dev, "tx submit failed (%d)\n",
154 usb_unanchor_urb(urb);
155 usb_anchor_urb(urb, &ar->tx_err);
160 if (likely(err == 0))
164 atomic_dec(&ar->tx_anch_urbs);
167 static void carl9170_usb_tx_data_complete(struct urb *urb)
169 struct ar9170 *ar = usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
171 if (WARN_ON_ONCE(!ar)) {
172 dev_kfree_skb_irq(urb->context);
176 atomic_dec(&ar->tx_anch_urbs);
178 switch (urb->status) {
179 /* everything is fine */
181 carl9170_tx_callback(ar, (void *)urb->context);
190 * Defer the frame clean-up to the tasklet worker.
191 * This is necessary, because carl9170_tx_drop
192 * does not work in an irqsave context.
194 usb_anchor_urb(urb, &ar->tx_err);
197 /* a random transmission error has occurred? */
199 if (net_ratelimit()) {
200 dev_err(&ar->udev->dev, "tx failed (%d)\n",
204 usb_anchor_urb(urb, &ar->tx_err);
208 if (likely(IS_STARTED(ar)))
209 carl9170_usb_submit_data_urb(ar);
212 static int carl9170_usb_submit_cmd_urb(struct ar9170 *ar)
217 if (atomic_inc_return(&ar->tx_cmd_urbs) != 1) {
218 atomic_dec(&ar->tx_cmd_urbs);
222 urb = usb_get_from_anchor(&ar->tx_cmd);
224 atomic_dec(&ar->tx_cmd_urbs);
228 usb_anchor_urb(urb, &ar->tx_anch);
229 err = usb_submit_urb(urb, GFP_ATOMIC);
231 usb_unanchor_urb(urb);
232 atomic_dec(&ar->tx_cmd_urbs);
239 static void carl9170_usb_cmd_complete(struct urb *urb)
241 struct ar9170 *ar = urb->context;
244 if (WARN_ON_ONCE(!ar))
247 atomic_dec(&ar->tx_cmd_urbs);
249 switch (urb->status) {
250 /* everything is fine */
266 if (!IS_INITIALIZED(ar))
270 dev_err(&ar->udev->dev, "submit cmd cb failed (%d).\n", err);
272 err = carl9170_usb_submit_cmd_urb(ar);
274 dev_err(&ar->udev->dev, "submit cmd failed (%d).\n", err);
277 static void carl9170_usb_rx_irq_complete(struct urb *urb)
279 struct ar9170 *ar = urb->context;
281 if (WARN_ON_ONCE(!ar))
284 switch (urb->status) {
285 /* everything is fine */
301 * While the carl9170 firmware does not use this EP, the
302 * firmware loader in the EEPROM unfortunately does.
303 * Therefore we need to be ready to handle out-of-band
304 * responses and traps in case the firmware crashed and
305 * the loader took over again.
307 carl9170_handle_command_response(ar, urb->transfer_buffer,
311 usb_anchor_urb(urb, &ar->rx_anch);
312 if (unlikely(usb_submit_urb(urb, GFP_ATOMIC)))
313 usb_unanchor_urb(urb);
316 static int carl9170_usb_submit_rx_urb(struct ar9170 *ar, gfp_t gfp)
319 int err = 0, runs = 0;
321 while ((atomic_read(&ar->rx_anch_urbs) < AR9170_NUM_RX_URBS) &&
322 (runs++ < AR9170_NUM_RX_URBS)) {
324 urb = usb_get_from_anchor(&ar->rx_pool);
326 usb_anchor_urb(urb, &ar->rx_anch);
327 err = usb_submit_urb(urb, gfp);
329 usb_unanchor_urb(urb);
330 usb_anchor_urb(urb, &ar->rx_pool);
332 atomic_dec(&ar->rx_pool_urbs);
333 atomic_inc(&ar->rx_anch_urbs);
342 static void carl9170_usb_rx_work(struct ar9170 *ar)
347 for (i = 0; i < AR9170_NUM_RX_URBS_POOL; i++) {
348 urb = usb_get_from_anchor(&ar->rx_work);
352 atomic_dec(&ar->rx_work_urbs);
353 if (IS_INITIALIZED(ar)) {
354 carl9170_rx(ar, urb->transfer_buffer,
358 usb_anchor_urb(urb, &ar->rx_pool);
359 atomic_inc(&ar->rx_pool_urbs);
363 carl9170_usb_submit_rx_urb(ar, GFP_ATOMIC);
367 void carl9170_usb_handle_tx_err(struct ar9170 *ar)
371 while ((urb = usb_get_from_anchor(&ar->tx_err))) {
372 struct sk_buff *skb = (void *)urb->context;
374 carl9170_tx_drop(ar, skb);
375 carl9170_tx_callback(ar, skb);
380 static void carl9170_usb_tasklet(unsigned long data)
382 struct ar9170 *ar = (struct ar9170 *) data;
384 if (!IS_INITIALIZED(ar))
387 carl9170_usb_rx_work(ar);
390 * Strictly speaking: The tx scheduler is not part of the USB system.
391 * But the rx worker returns frames back to the mac80211-stack and
392 * this is the _perfect_ place to generate the next transmissions.
395 carl9170_tx_scheduler(ar);
398 static void carl9170_usb_rx_complete(struct urb *urb)
400 struct ar9170 *ar = (struct ar9170 *)urb->context;
403 if (WARN_ON_ONCE(!ar))
406 atomic_dec(&ar->rx_anch_urbs);
408 switch (urb->status) {
411 usb_anchor_urb(urb, &ar->rx_work);
412 atomic_inc(&ar->rx_work_urbs);
419 /* handle disconnect events*/
423 /* handle all other errors */
424 usb_anchor_urb(urb, &ar->rx_pool);
425 atomic_inc(&ar->rx_pool_urbs);
429 err = carl9170_usb_submit_rx_urb(ar, GFP_ATOMIC);
432 * usb_submit_rx_urb reported a problem.
433 * In case this is due to a rx buffer shortage,
434 * elevate the tasklet worker priority to
435 * the highest available level.
437 tasklet_hi_schedule(&ar->usb_tasklet);
439 if (atomic_read(&ar->rx_anch_urbs) == 0) {
441 * The system is too slow to cope with
442 * the enormous workload. We have simply
443 * run out of active rx urbs and this
444 * unfortunately leads to an unpredictable
448 ieee80211_queue_work(ar->hw, &ar->ping_work);
452 * Using anything less than _high_ priority absolutely
453 * kills the rx performance my UP-System...
455 tasklet_hi_schedule(&ar->usb_tasklet);
459 static struct urb *carl9170_usb_alloc_rx_urb(struct ar9170 *ar, gfp_t gfp)
464 buf = kmalloc(ar->fw.rx_size, gfp);
468 urb = usb_alloc_urb(0, gfp);
474 usb_fill_bulk_urb(urb, ar->udev, usb_rcvbulkpipe(ar->udev,
475 AR9170_USB_EP_RX), buf, ar->fw.rx_size,
476 carl9170_usb_rx_complete, ar);
478 urb->transfer_flags |= URB_FREE_BUFFER;
483 static int carl9170_usb_send_rx_irq_urb(struct ar9170 *ar)
485 struct urb *urb = NULL;
489 urb = usb_alloc_urb(0, GFP_KERNEL);
493 ibuf = kmalloc(AR9170_USB_EP_CTRL_MAX, GFP_KERNEL);
497 usb_fill_int_urb(urb, ar->udev, usb_rcvintpipe(ar->udev,
498 AR9170_USB_EP_IRQ), ibuf, AR9170_USB_EP_CTRL_MAX,
499 carl9170_usb_rx_irq_complete, ar, 1);
501 urb->transfer_flags |= URB_FREE_BUFFER;
503 usb_anchor_urb(urb, &ar->rx_anch);
504 err = usb_submit_urb(urb, GFP_KERNEL);
506 usb_unanchor_urb(urb);
513 static int carl9170_usb_init_rx_bulk_urbs(struct ar9170 *ar)
516 int i, err = -EINVAL;
519 * The driver actively maintains a second shadow
520 * pool for inactive, but fully-prepared rx urbs.
522 * The pool should help the driver to master huge
523 * workload spikes without running the risk of
524 * undersupplying the hardware or wasting time by
525 * processing rx data (streams) inside the urb
526 * completion (hardirq context).
528 for (i = 0; i < AR9170_NUM_RX_URBS_POOL; i++) {
529 urb = carl9170_usb_alloc_rx_urb(ar, GFP_KERNEL);
535 usb_anchor_urb(urb, &ar->rx_pool);
536 atomic_inc(&ar->rx_pool_urbs);
540 err = carl9170_usb_submit_rx_urb(ar, GFP_KERNEL);
544 /* the device now waiting for the firmware. */
545 carl9170_set_state_when(ar, CARL9170_STOPPED, CARL9170_IDLE);
550 usb_scuttle_anchored_urbs(&ar->rx_pool);
551 usb_scuttle_anchored_urbs(&ar->rx_work);
552 usb_kill_anchored_urbs(&ar->rx_anch);
556 static int carl9170_usb_flush(struct ar9170 *ar)
561 while ((urb = usb_get_from_anchor(&ar->tx_wait))) {
562 struct sk_buff *skb = (void *)urb->context;
563 carl9170_tx_drop(ar, skb);
564 carl9170_tx_callback(ar, skb);
568 ret = usb_wait_anchor_empty_timeout(&ar->tx_cmd, 1000);
572 /* lets wait a while until the tx - queues are dried out */
573 ret = usb_wait_anchor_empty_timeout(&ar->tx_anch, 1000);
577 usb_kill_anchored_urbs(&ar->tx_anch);
578 carl9170_usb_handle_tx_err(ar);
583 static void carl9170_usb_cancel_urbs(struct ar9170 *ar)
587 carl9170_set_state(ar, CARL9170_UNKNOWN_STATE);
589 err = carl9170_usb_flush(ar);
591 dev_err(&ar->udev->dev, "stuck tx urbs!\n");
593 usb_poison_anchored_urbs(&ar->tx_anch);
594 carl9170_usb_handle_tx_err(ar);
595 usb_poison_anchored_urbs(&ar->rx_anch);
597 tasklet_kill(&ar->usb_tasklet);
599 usb_scuttle_anchored_urbs(&ar->rx_work);
600 usb_scuttle_anchored_urbs(&ar->rx_pool);
601 usb_scuttle_anchored_urbs(&ar->tx_cmd);
604 int __carl9170_exec_cmd(struct ar9170 *ar, struct carl9170_cmd *cmd,
610 if (!IS_INITIALIZED(ar)) {
615 if (WARN_ON(cmd->hdr.len > CARL9170_MAX_CMD_LEN - 4)) {
620 urb = usb_alloc_urb(0, GFP_ATOMIC);
626 if (ar->usb_ep_cmd_is_bulk)
627 usb_fill_bulk_urb(urb, ar->udev,
628 usb_sndbulkpipe(ar->udev, AR9170_USB_EP_CMD),
629 cmd, cmd->hdr.len + 4,
630 carl9170_usb_cmd_complete, ar);
632 usb_fill_int_urb(urb, ar->udev,
633 usb_sndintpipe(ar->udev, AR9170_USB_EP_CMD),
634 cmd, cmd->hdr.len + 4,
635 carl9170_usb_cmd_complete, ar, 1);
638 urb->transfer_flags |= URB_FREE_BUFFER;
640 usb_anchor_urb(urb, &ar->tx_cmd);
643 return carl9170_usb_submit_cmd_urb(ar);
652 int carl9170_exec_cmd(struct ar9170 *ar, const enum carl9170_cmd_oids cmd,
653 unsigned int plen, void *payload, unsigned int outlen, void *out)
656 unsigned long time_left;
658 if (!IS_ACCEPTING_CMD(ar))
661 if (!(cmd & CARL9170_CMD_ASYNC_FLAG))
664 ar->cmd.hdr.len = plen;
665 ar->cmd.hdr.cmd = cmd;
666 /* writing multiple regs fills this buffer already */
667 if (plen && payload != (u8 *)(ar->cmd.data))
668 memcpy(ar->cmd.data, payload, plen);
670 spin_lock_bh(&ar->cmd_lock);
671 ar->readbuf = (u8 *)out;
672 ar->readlen = outlen;
673 spin_unlock_bh(&ar->cmd_lock);
675 reinit_completion(&ar->cmd_wait);
676 err = __carl9170_exec_cmd(ar, &ar->cmd, false);
678 if (!(cmd & CARL9170_CMD_ASYNC_FLAG)) {
679 time_left = wait_for_completion_timeout(&ar->cmd_wait, HZ);
680 if (time_left == 0) {
685 if (ar->readlen != outlen) {
694 /* Maybe the device was removed in the moment we were waiting? */
695 if (IS_STARTED(ar)) {
696 dev_err(&ar->udev->dev, "no command feedback "
697 "received (%d).\n", err);
699 /* provide some maybe useful debug information */
700 print_hex_dump_bytes("carl9170 cmd: ", DUMP_PREFIX_NONE,
703 carl9170_restart(ar, CARL9170_RR_COMMAND_TIMEOUT);
706 /* invalidate to avoid completing the next command prematurely */
707 spin_lock_bh(&ar->cmd_lock);
710 spin_unlock_bh(&ar->cmd_lock);
715 void carl9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb)
718 struct ar9170_stream *tx_stream;
725 urb = usb_alloc_urb(0, GFP_ATOMIC);
729 if (ar->fw.tx_stream) {
730 tx_stream = (void *) (skb->data - sizeof(*tx_stream));
732 len = skb->len + sizeof(*tx_stream);
733 tx_stream->length = cpu_to_le16(len);
734 tx_stream->tag = cpu_to_le16(AR9170_TX_STREAM_TAG);
741 usb_fill_bulk_urb(urb, ar->udev, usb_sndbulkpipe(ar->udev,
742 AR9170_USB_EP_TX), data, len,
743 carl9170_usb_tx_data_complete, skb);
745 urb->transfer_flags |= URB_ZERO_PACKET;
747 usb_anchor_urb(urb, &ar->tx_wait);
751 carl9170_usb_submit_data_urb(ar);
755 carl9170_tx_drop(ar, skb);
756 carl9170_tx_callback(ar, skb);
759 static void carl9170_release_firmware(struct ar9170 *ar)
762 release_firmware(ar->fw.fw);
763 memset(&ar->fw, 0, sizeof(ar->fw));
767 void carl9170_usb_stop(struct ar9170 *ar)
771 carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STOPPED);
773 ret = carl9170_usb_flush(ar);
775 dev_err(&ar->udev->dev, "kill pending tx urbs.\n");
777 usb_poison_anchored_urbs(&ar->tx_anch);
778 carl9170_usb_handle_tx_err(ar);
780 /* kill any pending command */
781 spin_lock_bh(&ar->cmd_lock);
783 spin_unlock_bh(&ar->cmd_lock);
784 complete(&ar->cmd_wait);
788 * So far we freed all tx urbs, but we won't dare to touch any rx urbs.
789 * Else we would end up with a unresponsive device...
793 int carl9170_usb_open(struct ar9170 *ar)
795 usb_unpoison_anchored_urbs(&ar->tx_anch);
797 carl9170_set_state_when(ar, CARL9170_STOPPED, CARL9170_IDLE);
801 static int carl9170_usb_load_firmware(struct ar9170 *ar)
805 unsigned int transfer;
810 buf = kmalloc(4096, GFP_KERNEL);
816 data = ar->fw.fw->data;
817 len = ar->fw.fw->size;
818 addr = ar->fw.address;
820 /* this removes the miniboot image */
821 data += ar->fw.offset;
822 len -= ar->fw.offset;
825 transfer = min_t(unsigned int, len, 4096u);
826 memcpy(buf, data, transfer);
828 err = usb_control_msg(ar->udev, usb_sndctrlpipe(ar->udev, 0),
829 0x30 /* FW DL */, 0x40 | USB_DIR_OUT,
830 addr >> 8, 0, buf, transfer, 100);
843 err = usb_control_msg(ar->udev, usb_sndctrlpipe(ar->udev, 0),
844 0x31 /* FW DL COMPLETE */,
845 0x40 | USB_DIR_OUT, 0, 0, NULL, 0, 200);
847 if (wait_for_completion_timeout(&ar->fw_boot_wait, HZ) == 0) {
852 err = carl9170_echo_test(ar, 0x4a110123);
856 /* now, start the command response counter */
862 dev_err(&ar->udev->dev, "firmware upload failed (%d).\n", err);
866 int carl9170_usb_restart(struct ar9170 *ar)
870 if (ar->intf->condition != USB_INTERFACE_BOUND)
874 * Disable the command response sequence counter check.
875 * We already know that the device/firmware is in a bad state.
876 * So, no extra points are awarded to anyone who reminds the
881 err = carl9170_reboot(ar);
883 carl9170_usb_stop(ar);
888 tasklet_schedule(&ar->usb_tasklet);
890 /* The reboot procedure can take quite a while to complete. */
893 err = carl9170_usb_open(ar);
897 err = carl9170_usb_load_firmware(ar);
904 carl9170_usb_cancel_urbs(ar);
908 void carl9170_usb_reset(struct ar9170 *ar)
911 * This is the last resort to get the device going again
912 * without any *user replugging action*.
914 * But there is a catch: usb_reset really is like a physical
915 * *reconnect*. The mac80211 state will be lost in the process.
916 * Therefore a userspace application, which is monitoring
917 * the link must step in.
919 carl9170_usb_cancel_urbs(ar);
921 carl9170_usb_stop(ar);
923 usb_queue_reset_device(ar->intf);
926 static int carl9170_usb_init_device(struct ar9170 *ar)
931 * The carl9170 firmware let's the driver know when it's
932 * ready for action. But we have to be prepared to gracefully
933 * handle all spurious [flushed] messages after each (re-)boot.
934 * Thus the command response counter remains disabled until it
935 * can be safely synchronized.
939 err = carl9170_usb_send_rx_irq_urb(ar);
943 err = carl9170_usb_init_rx_bulk_urbs(ar);
947 err = carl9170_usb_open(ar);
951 mutex_lock(&ar->mutex);
952 err = carl9170_usb_load_firmware(ar);
953 mutex_unlock(&ar->mutex);
960 carl9170_usb_stop(ar);
963 carl9170_usb_cancel_urbs(ar);
969 static void carl9170_usb_firmware_failed(struct ar9170 *ar)
971 /* Store a copies of the usb_interface and usb_device pointer locally.
972 * This is because release_driver initiates carl9170_usb_disconnect,
973 * which in turn frees our driver context (ar).
975 struct usb_interface *intf = ar->intf;
976 struct usb_device *udev = ar->udev;
978 complete(&ar->fw_load_wait);
979 /* at this point 'ar' could be already freed. Don't use it anymore */
982 /* unbind anything failed */
983 usb_lock_device(udev);
984 usb_driver_release_interface(&carl9170_driver, intf);
985 usb_unlock_device(udev);
990 static void carl9170_usb_firmware_finish(struct ar9170 *ar)
992 struct usb_interface *intf = ar->intf;
995 err = carl9170_parse_firmware(ar);
999 err = carl9170_usb_init_device(ar);
1003 err = carl9170_register(ar);
1005 carl9170_usb_stop(ar);
1009 complete(&ar->fw_load_wait);
1014 carl9170_usb_cancel_urbs(ar);
1017 carl9170_release_firmware(ar);
1018 carl9170_usb_firmware_failed(ar);
1021 static void carl9170_usb_firmware_step2(const struct firmware *fw,
1024 struct ar9170 *ar = context;
1028 carl9170_usb_firmware_finish(ar);
1032 dev_err(&ar->udev->dev, "firmware not found.\n");
1033 carl9170_usb_firmware_failed(ar);
1036 static int carl9170_usb_probe(struct usb_interface *intf,
1037 const struct usb_device_id *id)
1039 struct usb_endpoint_descriptor *ep;
1041 struct usb_device *udev;
1044 err = usb_reset_device(interface_to_usbdev(intf));
1048 ar = carl9170_alloc(sizeof(*ar));
1052 udev = interface_to_usbdev(intf);
1055 ar->features = id->driver_info;
1057 /* We need to remember the type of endpoint 4 because it differs
1058 * between high- and full-speed configuration. The high-speed
1059 * configuration specifies it as interrupt and the full-speed
1060 * configuration as bulk endpoint. This information is required
1061 * later when sending urbs to that endpoint.
1063 for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; ++i) {
1064 ep = &intf->cur_altsetting->endpoint[i].desc;
1066 if (usb_endpoint_num(ep) == AR9170_USB_EP_CMD &&
1067 usb_endpoint_dir_out(ep) &&
1068 usb_endpoint_type(ep) == USB_ENDPOINT_XFER_BULK)
1069 ar->usb_ep_cmd_is_bulk = true;
1072 usb_set_intfdata(intf, ar);
1073 SET_IEEE80211_DEV(ar->hw, &intf->dev);
1075 init_usb_anchor(&ar->rx_anch);
1076 init_usb_anchor(&ar->rx_pool);
1077 init_usb_anchor(&ar->rx_work);
1078 init_usb_anchor(&ar->tx_wait);
1079 init_usb_anchor(&ar->tx_anch);
1080 init_usb_anchor(&ar->tx_cmd);
1081 init_usb_anchor(&ar->tx_err);
1082 init_completion(&ar->cmd_wait);
1083 init_completion(&ar->fw_boot_wait);
1084 init_completion(&ar->fw_load_wait);
1085 tasklet_init(&ar->usb_tasklet, carl9170_usb_tasklet,
1088 atomic_set(&ar->tx_cmd_urbs, 0);
1089 atomic_set(&ar->tx_anch_urbs, 0);
1090 atomic_set(&ar->rx_work_urbs, 0);
1091 atomic_set(&ar->rx_anch_urbs, 0);
1092 atomic_set(&ar->rx_pool_urbs, 0);
1096 carl9170_set_state(ar, CARL9170_STOPPED);
1098 err = request_firmware_nowait(THIS_MODULE, 1, CARL9170FW_NAME,
1099 &ar->udev->dev, GFP_KERNEL, ar, carl9170_usb_firmware_step2);
1107 static void carl9170_usb_disconnect(struct usb_interface *intf)
1109 struct ar9170 *ar = usb_get_intfdata(intf);
1110 struct usb_device *udev;
1116 wait_for_completion(&ar->fw_load_wait);
1118 if (IS_INITIALIZED(ar)) {
1119 carl9170_reboot(ar);
1120 carl9170_usb_stop(ar);
1123 carl9170_usb_cancel_urbs(ar);
1124 carl9170_unregister(ar);
1126 usb_set_intfdata(intf, NULL);
1128 carl9170_release_firmware(ar);
1133 static int carl9170_usb_suspend(struct usb_interface *intf,
1134 pm_message_t message)
1136 struct ar9170 *ar = usb_get_intfdata(intf);
1141 carl9170_usb_cancel_urbs(ar);
1146 static int carl9170_usb_resume(struct usb_interface *intf)
1148 struct ar9170 *ar = usb_get_intfdata(intf);
1154 usb_unpoison_anchored_urbs(&ar->rx_anch);
1155 carl9170_set_state(ar, CARL9170_STOPPED);
1158 * The USB documentation demands that [for suspend] all traffic
1159 * to and from the device has to stop. This would be fine, but
1160 * there's a catch: the device[usb phy] does not come back.
1162 * Upon resume the firmware will "kill" itself and the
1163 * boot-code sorts out the magic voodoo.
1164 * Not very nice, but there's not much what could go wrong.
1168 err = carl9170_usb_init_device(ar);
1175 carl9170_usb_cancel_urbs(ar);
1179 #endif /* CONFIG_PM */
1181 static struct usb_driver carl9170_driver = {
1182 .name = KBUILD_MODNAME,
1183 .probe = carl9170_usb_probe,
1184 .disconnect = carl9170_usb_disconnect,
1185 .id_table = carl9170_usb_ids,
1188 .suspend = carl9170_usb_suspend,
1189 .resume = carl9170_usb_resume,
1190 .reset_resume = carl9170_usb_resume,
1191 #endif /* CONFIG_PM */
1192 .disable_hub_initiated_lpm = 1,
1195 module_usb_driver(carl9170_driver);