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 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) },
115 /* AVM FRITZ!WLAN USB Stick N */
116 { USB_DEVICE(0x057c, 0x8401) },
117 /* AVM FRITZ!WLAN USB Stick N 2.4 */
118 { USB_DEVICE(0x057c, 0x8402) },
119 /* Qwest/Actiontec 802AIN Wireless N USB Network Adapter */
120 { USB_DEVICE(0x1668, 0x1200) },
121 /* Airlive X.USB a/b/g/n */
122 { USB_DEVICE(0x1b75, 0x9170) },
127 MODULE_DEVICE_TABLE(usb, carl9170_usb_ids);
129 static void carl9170_usb_submit_data_urb(struct ar9170 *ar)
134 if (atomic_inc_return(&ar->tx_anch_urbs) > AR9170_NUM_TX_URBS)
137 urb = usb_get_from_anchor(&ar->tx_wait);
141 usb_anchor_urb(urb, &ar->tx_anch);
143 err = usb_submit_urb(urb, GFP_ATOMIC);
145 if (net_ratelimit()) {
146 dev_err(&ar->udev->dev, "tx submit failed (%d)\n",
150 usb_unanchor_urb(urb);
151 usb_anchor_urb(urb, &ar->tx_err);
156 if (likely(err == 0))
160 atomic_dec(&ar->tx_anch_urbs);
163 static void carl9170_usb_tx_data_complete(struct urb *urb)
165 struct ar9170 *ar = usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
167 if (WARN_ON_ONCE(!ar)) {
168 dev_kfree_skb_irq(urb->context);
172 atomic_dec(&ar->tx_anch_urbs);
174 switch (urb->status) {
175 /* everything is fine */
177 carl9170_tx_callback(ar, (void *)urb->context);
186 * Defer the frame clean-up to the tasklet worker.
187 * This is necessary, because carl9170_tx_drop
188 * does not work in an irqsave context.
190 usb_anchor_urb(urb, &ar->tx_err);
193 /* a random transmission error has occurred? */
195 if (net_ratelimit()) {
196 dev_err(&ar->udev->dev, "tx failed (%d)\n",
200 usb_anchor_urb(urb, &ar->tx_err);
204 if (likely(IS_STARTED(ar)))
205 carl9170_usb_submit_data_urb(ar);
208 static int carl9170_usb_submit_cmd_urb(struct ar9170 *ar)
213 if (atomic_inc_return(&ar->tx_cmd_urbs) != 1) {
214 atomic_dec(&ar->tx_cmd_urbs);
218 urb = usb_get_from_anchor(&ar->tx_cmd);
220 atomic_dec(&ar->tx_cmd_urbs);
224 usb_anchor_urb(urb, &ar->tx_anch);
225 err = usb_submit_urb(urb, GFP_ATOMIC);
227 usb_unanchor_urb(urb);
228 atomic_dec(&ar->tx_cmd_urbs);
235 static void carl9170_usb_cmd_complete(struct urb *urb)
237 struct ar9170 *ar = urb->context;
240 if (WARN_ON_ONCE(!ar))
243 atomic_dec(&ar->tx_cmd_urbs);
245 switch (urb->status) {
246 /* everything is fine */
262 if (!IS_INITIALIZED(ar))
266 dev_err(&ar->udev->dev, "submit cmd cb failed (%d).\n", err);
268 err = carl9170_usb_submit_cmd_urb(ar);
270 dev_err(&ar->udev->dev, "submit cmd failed (%d).\n", err);
273 static void carl9170_usb_rx_irq_complete(struct urb *urb)
275 struct ar9170 *ar = urb->context;
277 if (WARN_ON_ONCE(!ar))
280 switch (urb->status) {
281 /* everything is fine */
296 carl9170_handle_command_response(ar, urb->transfer_buffer,
300 usb_anchor_urb(urb, &ar->rx_anch);
301 if (unlikely(usb_submit_urb(urb, GFP_ATOMIC)))
302 usb_unanchor_urb(urb);
305 static int carl9170_usb_submit_rx_urb(struct ar9170 *ar, gfp_t gfp)
308 int err = 0, runs = 0;
310 while ((atomic_read(&ar->rx_anch_urbs) < AR9170_NUM_RX_URBS) &&
311 (runs++ < AR9170_NUM_RX_URBS)) {
313 urb = usb_get_from_anchor(&ar->rx_pool);
315 usb_anchor_urb(urb, &ar->rx_anch);
316 err = usb_submit_urb(urb, gfp);
318 usb_unanchor_urb(urb);
319 usb_anchor_urb(urb, &ar->rx_pool);
321 atomic_dec(&ar->rx_pool_urbs);
322 atomic_inc(&ar->rx_anch_urbs);
331 static void carl9170_usb_rx_work(struct ar9170 *ar)
336 for (i = 0; i < AR9170_NUM_RX_URBS_POOL; i++) {
337 urb = usb_get_from_anchor(&ar->rx_work);
341 atomic_dec(&ar->rx_work_urbs);
342 if (IS_INITIALIZED(ar)) {
343 carl9170_rx(ar, urb->transfer_buffer,
347 usb_anchor_urb(urb, &ar->rx_pool);
348 atomic_inc(&ar->rx_pool_urbs);
352 carl9170_usb_submit_rx_urb(ar, GFP_ATOMIC);
356 void carl9170_usb_handle_tx_err(struct ar9170 *ar)
360 while ((urb = usb_get_from_anchor(&ar->tx_err))) {
361 struct sk_buff *skb = (void *)urb->context;
363 carl9170_tx_drop(ar, skb);
364 carl9170_tx_callback(ar, skb);
369 static void carl9170_usb_tasklet(unsigned long data)
371 struct ar9170 *ar = (struct ar9170 *) data;
373 if (!IS_INITIALIZED(ar))
376 carl9170_usb_rx_work(ar);
379 * Strictly speaking: The tx scheduler is not part of the USB system.
380 * But the rx worker returns frames back to the mac80211-stack and
381 * this is the _perfect_ place to generate the next transmissions.
384 carl9170_tx_scheduler(ar);
387 static void carl9170_usb_rx_complete(struct urb *urb)
389 struct ar9170 *ar = (struct ar9170 *)urb->context;
392 if (WARN_ON_ONCE(!ar))
395 atomic_dec(&ar->rx_anch_urbs);
397 switch (urb->status) {
400 usb_anchor_urb(urb, &ar->rx_work);
401 atomic_inc(&ar->rx_work_urbs);
408 /* handle disconnect events*/
412 /* handle all other errors */
413 usb_anchor_urb(urb, &ar->rx_pool);
414 atomic_inc(&ar->rx_pool_urbs);
418 err = carl9170_usb_submit_rx_urb(ar, GFP_ATOMIC);
421 * usb_submit_rx_urb reported a problem.
422 * In case this is due to a rx buffer shortage,
423 * elevate the tasklet worker priority to
424 * the highest available level.
426 tasklet_hi_schedule(&ar->usb_tasklet);
428 if (atomic_read(&ar->rx_anch_urbs) == 0) {
430 * The system is too slow to cope with
431 * the enormous workload. We have simply
432 * run out of active rx urbs and this
433 * unfortunately leads to an unpredictable
437 ieee80211_queue_work(ar->hw, &ar->ping_work);
441 * Using anything less than _high_ priority absolutely
442 * kills the rx performance my UP-System...
444 tasklet_hi_schedule(&ar->usb_tasklet);
448 static struct urb *carl9170_usb_alloc_rx_urb(struct ar9170 *ar, gfp_t gfp)
453 buf = kmalloc(ar->fw.rx_size, gfp);
457 urb = usb_alloc_urb(0, gfp);
463 usb_fill_bulk_urb(urb, ar->udev, usb_rcvbulkpipe(ar->udev,
464 AR9170_USB_EP_RX), buf, ar->fw.rx_size,
465 carl9170_usb_rx_complete, ar);
467 urb->transfer_flags |= URB_FREE_BUFFER;
472 static int carl9170_usb_send_rx_irq_urb(struct ar9170 *ar)
474 struct urb *urb = NULL;
478 urb = usb_alloc_urb(0, GFP_KERNEL);
482 ibuf = kmalloc(AR9170_USB_EP_CTRL_MAX, GFP_KERNEL);
486 usb_fill_int_urb(urb, ar->udev, usb_rcvintpipe(ar->udev,
487 AR9170_USB_EP_IRQ), ibuf, AR9170_USB_EP_CTRL_MAX,
488 carl9170_usb_rx_irq_complete, ar, 1);
490 urb->transfer_flags |= URB_FREE_BUFFER;
492 usb_anchor_urb(urb, &ar->rx_anch);
493 err = usb_submit_urb(urb, GFP_KERNEL);
495 usb_unanchor_urb(urb);
502 static int carl9170_usb_init_rx_bulk_urbs(struct ar9170 *ar)
505 int i, err = -EINVAL;
508 * The driver actively maintains a second shadow
509 * pool for inactive, but fully-prepared rx urbs.
511 * The pool should help the driver to master huge
512 * workload spikes without running the risk of
513 * undersupplying the hardware or wasting time by
514 * processing rx data (streams) inside the urb
515 * completion (hardirq context).
517 for (i = 0; i < AR9170_NUM_RX_URBS_POOL; i++) {
518 urb = carl9170_usb_alloc_rx_urb(ar, GFP_KERNEL);
524 usb_anchor_urb(urb, &ar->rx_pool);
525 atomic_inc(&ar->rx_pool_urbs);
529 err = carl9170_usb_submit_rx_urb(ar, GFP_KERNEL);
533 /* the device now waiting for the firmware. */
534 carl9170_set_state_when(ar, CARL9170_STOPPED, CARL9170_IDLE);
539 usb_scuttle_anchored_urbs(&ar->rx_pool);
540 usb_scuttle_anchored_urbs(&ar->rx_work);
541 usb_kill_anchored_urbs(&ar->rx_anch);
545 static int carl9170_usb_flush(struct ar9170 *ar)
550 while ((urb = usb_get_from_anchor(&ar->tx_wait))) {
551 struct sk_buff *skb = (void *)urb->context;
552 carl9170_tx_drop(ar, skb);
553 carl9170_tx_callback(ar, skb);
557 ret = usb_wait_anchor_empty_timeout(&ar->tx_cmd, 1000);
561 /* lets wait a while until the tx - queues are dried out */
562 ret = usb_wait_anchor_empty_timeout(&ar->tx_anch, 1000);
566 usb_kill_anchored_urbs(&ar->tx_anch);
567 carl9170_usb_handle_tx_err(ar);
572 static void carl9170_usb_cancel_urbs(struct ar9170 *ar)
576 carl9170_set_state(ar, CARL9170_UNKNOWN_STATE);
578 err = carl9170_usb_flush(ar);
580 dev_err(&ar->udev->dev, "stuck tx urbs!\n");
582 usb_poison_anchored_urbs(&ar->tx_anch);
583 carl9170_usb_handle_tx_err(ar);
584 usb_poison_anchored_urbs(&ar->rx_anch);
586 tasklet_kill(&ar->usb_tasklet);
588 usb_scuttle_anchored_urbs(&ar->rx_work);
589 usb_scuttle_anchored_urbs(&ar->rx_pool);
590 usb_scuttle_anchored_urbs(&ar->tx_cmd);
593 int __carl9170_exec_cmd(struct ar9170 *ar, struct carl9170_cmd *cmd,
599 if (!IS_INITIALIZED(ar)) {
604 if (WARN_ON(cmd->hdr.len > CARL9170_MAX_CMD_LEN - 4)) {
609 urb = usb_alloc_urb(0, GFP_ATOMIC);
615 usb_fill_int_urb(urb, ar->udev, usb_sndintpipe(ar->udev,
616 AR9170_USB_EP_CMD), cmd, cmd->hdr.len + 4,
617 carl9170_usb_cmd_complete, ar, 1);
620 urb->transfer_flags |= URB_FREE_BUFFER;
622 usb_anchor_urb(urb, &ar->tx_cmd);
625 return carl9170_usb_submit_cmd_urb(ar);
634 int carl9170_exec_cmd(struct ar9170 *ar, const enum carl9170_cmd_oids cmd,
635 unsigned int plen, void *payload, unsigned int outlen, void *out)
639 if (!IS_ACCEPTING_CMD(ar))
642 if (!(cmd & CARL9170_CMD_ASYNC_FLAG))
645 ar->cmd.hdr.len = plen;
646 ar->cmd.hdr.cmd = cmd;
647 /* writing multiple regs fills this buffer already */
648 if (plen && payload != (u8 *)(ar->cmd.data))
649 memcpy(ar->cmd.data, payload, plen);
651 spin_lock_bh(&ar->cmd_lock);
652 ar->readbuf = (u8 *)out;
653 ar->readlen = outlen;
654 spin_unlock_bh(&ar->cmd_lock);
656 err = __carl9170_exec_cmd(ar, &ar->cmd, false);
658 if (!(cmd & CARL9170_CMD_ASYNC_FLAG)) {
659 err = wait_for_completion_timeout(&ar->cmd_wait, HZ);
665 if (ar->readlen != outlen) {
674 /* Maybe the device was removed in the moment we were waiting? */
675 if (IS_STARTED(ar)) {
676 dev_err(&ar->udev->dev, "no command feedback "
677 "received (%d).\n", err);
679 /* provide some maybe useful debug information */
680 print_hex_dump_bytes("carl9170 cmd: ", DUMP_PREFIX_NONE,
683 carl9170_restart(ar, CARL9170_RR_COMMAND_TIMEOUT);
686 /* invalidate to avoid completing the next command prematurely */
687 spin_lock_bh(&ar->cmd_lock);
690 spin_unlock_bh(&ar->cmd_lock);
695 void carl9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb)
698 struct ar9170_stream *tx_stream;
705 urb = usb_alloc_urb(0, GFP_ATOMIC);
709 if (ar->fw.tx_stream) {
710 tx_stream = (void *) (skb->data - sizeof(*tx_stream));
712 len = skb->len + sizeof(*tx_stream);
713 tx_stream->length = cpu_to_le16(len);
714 tx_stream->tag = cpu_to_le16(AR9170_TX_STREAM_TAG);
721 usb_fill_bulk_urb(urb, ar->udev, usb_sndbulkpipe(ar->udev,
722 AR9170_USB_EP_TX), data, len,
723 carl9170_usb_tx_data_complete, skb);
725 urb->transfer_flags |= URB_ZERO_PACKET;
727 usb_anchor_urb(urb, &ar->tx_wait);
731 carl9170_usb_submit_data_urb(ar);
735 carl9170_tx_drop(ar, skb);
736 carl9170_tx_callback(ar, skb);
739 static void carl9170_release_firmware(struct ar9170 *ar)
742 release_firmware(ar->fw.fw);
743 memset(&ar->fw, 0, sizeof(ar->fw));
747 void carl9170_usb_stop(struct ar9170 *ar)
751 carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STOPPED);
753 ret = carl9170_usb_flush(ar);
755 dev_err(&ar->udev->dev, "kill pending tx urbs.\n");
757 usb_poison_anchored_urbs(&ar->tx_anch);
758 carl9170_usb_handle_tx_err(ar);
760 /* kill any pending command */
761 spin_lock_bh(&ar->cmd_lock);
763 spin_unlock_bh(&ar->cmd_lock);
764 complete_all(&ar->cmd_wait);
766 /* This is required to prevent an early completion on _start */
767 INIT_COMPLETION(ar->cmd_wait);
771 * So far we freed all tx urbs, but we won't dare to touch any rx urbs.
772 * Else we would end up with a unresponsive device...
776 int carl9170_usb_open(struct ar9170 *ar)
778 usb_unpoison_anchored_urbs(&ar->tx_anch);
780 carl9170_set_state_when(ar, CARL9170_STOPPED, CARL9170_IDLE);
784 static int carl9170_usb_load_firmware(struct ar9170 *ar)
788 unsigned int transfer;
793 buf = kmalloc(4096, GFP_KERNEL);
799 data = ar->fw.fw->data;
800 len = ar->fw.fw->size;
801 addr = ar->fw.address;
803 /* this removes the miniboot image */
804 data += ar->fw.offset;
805 len -= ar->fw.offset;
808 transfer = min_t(unsigned int, len, 4096u);
809 memcpy(buf, data, transfer);
811 err = usb_control_msg(ar->udev, usb_sndctrlpipe(ar->udev, 0),
812 0x30 /* FW DL */, 0x40 | USB_DIR_OUT,
813 addr >> 8, 0, buf, transfer, 100);
826 err = usb_control_msg(ar->udev, usb_sndctrlpipe(ar->udev, 0),
827 0x31 /* FW DL COMPLETE */,
828 0x40 | USB_DIR_OUT, 0, 0, NULL, 0, 200);
830 if (wait_for_completion_timeout(&ar->fw_boot_wait, HZ) == 0) {
835 err = carl9170_echo_test(ar, 0x4a110123);
839 /* now, start the command response counter */
845 dev_err(&ar->udev->dev, "firmware upload failed (%d).\n", err);
849 int carl9170_usb_restart(struct ar9170 *ar)
853 if (ar->intf->condition != USB_INTERFACE_BOUND)
857 * Disable the command response sequence counter check.
858 * We already know that the device/firmware is in a bad state.
859 * So, no extra points are awarded to anyone who reminds the
864 err = carl9170_reboot(ar);
866 carl9170_usb_stop(ar);
871 tasklet_schedule(&ar->usb_tasklet);
873 /* The reboot procedure can take quite a while to complete. */
876 err = carl9170_usb_open(ar);
880 err = carl9170_usb_load_firmware(ar);
887 carl9170_usb_cancel_urbs(ar);
891 void carl9170_usb_reset(struct ar9170 *ar)
894 * This is the last resort to get the device going again
895 * without any *user replugging action*.
897 * But there is a catch: usb_reset really is like a physical
898 * *reconnect*. The mac80211 state will be lost in the process.
899 * Therefore a userspace application, which is monitoring
900 * the link must step in.
902 carl9170_usb_cancel_urbs(ar);
904 carl9170_usb_stop(ar);
906 usb_queue_reset_device(ar->intf);
909 static int carl9170_usb_init_device(struct ar9170 *ar)
914 * The carl9170 firmware let's the driver know when it's
915 * ready for action. But we have to be prepared to gracefully
916 * handle all spurious [flushed] messages after each (re-)boot.
917 * Thus the command response counter remains disabled until it
918 * can be safely synchronized.
922 err = carl9170_usb_send_rx_irq_urb(ar);
926 err = carl9170_usb_init_rx_bulk_urbs(ar);
930 err = carl9170_usb_open(ar);
934 mutex_lock(&ar->mutex);
935 err = carl9170_usb_load_firmware(ar);
936 mutex_unlock(&ar->mutex);
943 carl9170_usb_stop(ar);
946 carl9170_usb_cancel_urbs(ar);
952 static void carl9170_usb_firmware_failed(struct ar9170 *ar)
954 struct device *parent = ar->udev->dev.parent;
955 struct usb_device *udev;
958 * Store a copy of the usb_device pointer locally.
959 * This is because device_release_driver initiates
960 * carl9170_usb_disconnect, which in turn frees our
961 * driver context (ar).
965 complete(&ar->fw_load_wait);
967 /* unbind anything failed */
971 device_release_driver(&udev->dev);
973 device_unlock(parent);
978 static void carl9170_usb_firmware_finish(struct ar9170 *ar)
982 err = carl9170_parse_firmware(ar);
986 err = carl9170_usb_init_device(ar);
990 err = carl9170_register(ar);
992 carl9170_usb_stop(ar);
996 complete(&ar->fw_load_wait);
997 usb_put_dev(ar->udev);
1001 carl9170_usb_cancel_urbs(ar);
1004 carl9170_release_firmware(ar);
1005 carl9170_usb_firmware_failed(ar);
1008 static void carl9170_usb_firmware_step2(const struct firmware *fw,
1011 struct ar9170 *ar = context;
1015 carl9170_usb_firmware_finish(ar);
1019 dev_err(&ar->udev->dev, "firmware not found.\n");
1020 carl9170_usb_firmware_failed(ar);
1023 static int carl9170_usb_probe(struct usb_interface *intf,
1024 const struct usb_device_id *id)
1027 struct usb_device *udev;
1030 err = usb_reset_device(interface_to_usbdev(intf));
1034 ar = carl9170_alloc(sizeof(*ar));
1038 udev = interface_to_usbdev(intf);
1042 ar->features = id->driver_info;
1044 usb_set_intfdata(intf, ar);
1045 SET_IEEE80211_DEV(ar->hw, &intf->dev);
1047 init_usb_anchor(&ar->rx_anch);
1048 init_usb_anchor(&ar->rx_pool);
1049 init_usb_anchor(&ar->rx_work);
1050 init_usb_anchor(&ar->tx_wait);
1051 init_usb_anchor(&ar->tx_anch);
1052 init_usb_anchor(&ar->tx_cmd);
1053 init_usb_anchor(&ar->tx_err);
1054 init_completion(&ar->cmd_wait);
1055 init_completion(&ar->fw_boot_wait);
1056 init_completion(&ar->fw_load_wait);
1057 tasklet_init(&ar->usb_tasklet, carl9170_usb_tasklet,
1060 atomic_set(&ar->tx_cmd_urbs, 0);
1061 atomic_set(&ar->tx_anch_urbs, 0);
1062 atomic_set(&ar->rx_work_urbs, 0);
1063 atomic_set(&ar->rx_anch_urbs, 0);
1064 atomic_set(&ar->rx_pool_urbs, 0);
1066 usb_get_dev(ar->udev);
1068 carl9170_set_state(ar, CARL9170_STOPPED);
1070 return request_firmware_nowait(THIS_MODULE, 1, CARL9170FW_NAME,
1071 &ar->udev->dev, GFP_KERNEL, ar, carl9170_usb_firmware_step2);
1074 static void carl9170_usb_disconnect(struct usb_interface *intf)
1076 struct ar9170 *ar = usb_get_intfdata(intf);
1077 struct usb_device *udev;
1083 wait_for_completion(&ar->fw_load_wait);
1085 if (IS_INITIALIZED(ar)) {
1086 carl9170_reboot(ar);
1087 carl9170_usb_stop(ar);
1090 carl9170_usb_cancel_urbs(ar);
1091 carl9170_unregister(ar);
1093 usb_set_intfdata(intf, NULL);
1095 carl9170_release_firmware(ar);
1101 static int carl9170_usb_suspend(struct usb_interface *intf,
1102 pm_message_t message)
1104 struct ar9170 *ar = usb_get_intfdata(intf);
1109 carl9170_usb_cancel_urbs(ar);
1114 static int carl9170_usb_resume(struct usb_interface *intf)
1116 struct ar9170 *ar = usb_get_intfdata(intf);
1122 usb_unpoison_anchored_urbs(&ar->rx_anch);
1123 carl9170_set_state(ar, CARL9170_STOPPED);
1126 * The USB documentation demands that [for suspend] all traffic
1127 * to and from the device has to stop. This would be fine, but
1128 * there's a catch: the device[usb phy] does not come back.
1130 * Upon resume the firmware will "kill" itself and the
1131 * boot-code sorts out the magic voodoo.
1132 * Not very nice, but there's not much what could go wrong.
1136 err = carl9170_usb_init_device(ar);
1143 carl9170_usb_cancel_urbs(ar);
1147 #endif /* CONFIG_PM */
1149 static struct usb_driver carl9170_driver = {
1150 .name = KBUILD_MODNAME,
1151 .probe = carl9170_usb_probe,
1152 .disconnect = carl9170_usb_disconnect,
1153 .id_table = carl9170_usb_ids,
1156 .suspend = carl9170_usb_suspend,
1157 .resume = carl9170_usb_resume,
1158 .reset_resume = carl9170_usb_resume,
1159 #endif /* CONFIG_PM */
1162 static int __init carl9170_usb_init(void)
1164 return usb_register(&carl9170_driver);
1167 static void __exit carl9170_usb_exit(void)
1169 usb_deregister(&carl9170_driver);
1172 module_init(carl9170_usb_init);
1173 module_exit(carl9170_usb_exit);