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) },
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 void carl9170_usb_submit_data_urb(struct ar9170
*ar
)
136 if (atomic_inc_return(&ar
->tx_anch_urbs
) > AR9170_NUM_TX_URBS
)
139 urb
= usb_get_from_anchor(&ar
->tx_wait
);
143 usb_anchor_urb(urb
, &ar
->tx_anch
);
145 err
= usb_submit_urb(urb
, GFP_ATOMIC
);
147 if (net_ratelimit()) {
148 dev_err(&ar
->udev
->dev
, "tx submit failed (%d)\n",
152 usb_unanchor_urb(urb
);
153 usb_anchor_urb(urb
, &ar
->tx_err
);
158 if (likely(err
== 0))
162 atomic_dec(&ar
->tx_anch_urbs
);
165 static void carl9170_usb_tx_data_complete(struct urb
*urb
)
167 struct ar9170
*ar
= usb_get_intfdata(usb_ifnum_to_if(urb
->dev
, 0));
169 if (WARN_ON_ONCE(!ar
)) {
170 dev_kfree_skb_irq(urb
->context
);
174 atomic_dec(&ar
->tx_anch_urbs
);
176 switch (urb
->status
) {
177 /* everything is fine */
179 carl9170_tx_callback(ar
, (void *)urb
->context
);
188 * Defer the frame clean-up to the tasklet worker.
189 * This is necessary, because carl9170_tx_drop
190 * does not work in an irqsave context.
192 usb_anchor_urb(urb
, &ar
->tx_err
);
195 /* a random transmission error has occurred? */
197 if (net_ratelimit()) {
198 dev_err(&ar
->udev
->dev
, "tx failed (%d)\n",
202 usb_anchor_urb(urb
, &ar
->tx_err
);
206 if (likely(IS_STARTED(ar
)))
207 carl9170_usb_submit_data_urb(ar
);
210 static int carl9170_usb_submit_cmd_urb(struct ar9170
*ar
)
215 if (atomic_inc_return(&ar
->tx_cmd_urbs
) != 1) {
216 atomic_dec(&ar
->tx_cmd_urbs
);
220 urb
= usb_get_from_anchor(&ar
->tx_cmd
);
222 atomic_dec(&ar
->tx_cmd_urbs
);
226 usb_anchor_urb(urb
, &ar
->tx_anch
);
227 err
= usb_submit_urb(urb
, GFP_ATOMIC
);
229 usb_unanchor_urb(urb
);
230 atomic_dec(&ar
->tx_cmd_urbs
);
237 static void carl9170_usb_cmd_complete(struct urb
*urb
)
239 struct ar9170
*ar
= urb
->context
;
242 if (WARN_ON_ONCE(!ar
))
245 atomic_dec(&ar
->tx_cmd_urbs
);
247 switch (urb
->status
) {
248 /* everything is fine */
264 if (!IS_INITIALIZED(ar
))
268 dev_err(&ar
->udev
->dev
, "submit cmd cb failed (%d).\n", err
);
270 err
= carl9170_usb_submit_cmd_urb(ar
);
272 dev_err(&ar
->udev
->dev
, "submit cmd failed (%d).\n", err
);
275 static void carl9170_usb_rx_irq_complete(struct urb
*urb
)
277 struct ar9170
*ar
= urb
->context
;
279 if (WARN_ON_ONCE(!ar
))
282 switch (urb
->status
) {
283 /* everything is fine */
299 * While the carl9170 firmware does not use this EP, the
300 * firmware loader in the EEPROM unfortunately does.
301 * Therefore we need to be ready to handle out-of-band
302 * responses and traps in case the firmware crashed and
303 * the loader took over again.
305 carl9170_handle_command_response(ar
, urb
->transfer_buffer
,
309 usb_anchor_urb(urb
, &ar
->rx_anch
);
310 if (unlikely(usb_submit_urb(urb
, GFP_ATOMIC
)))
311 usb_unanchor_urb(urb
);
314 static int carl9170_usb_submit_rx_urb(struct ar9170
*ar
, gfp_t gfp
)
317 int err
= 0, runs
= 0;
319 while ((atomic_read(&ar
->rx_anch_urbs
) < AR9170_NUM_RX_URBS
) &&
320 (runs
++ < AR9170_NUM_RX_URBS
)) {
322 urb
= usb_get_from_anchor(&ar
->rx_pool
);
324 usb_anchor_urb(urb
, &ar
->rx_anch
);
325 err
= usb_submit_urb(urb
, gfp
);
327 usb_unanchor_urb(urb
);
328 usb_anchor_urb(urb
, &ar
->rx_pool
);
330 atomic_dec(&ar
->rx_pool_urbs
);
331 atomic_inc(&ar
->rx_anch_urbs
);
340 static void carl9170_usb_rx_work(struct ar9170
*ar
)
345 for (i
= 0; i
< AR9170_NUM_RX_URBS_POOL
; i
++) {
346 urb
= usb_get_from_anchor(&ar
->rx_work
);
350 atomic_dec(&ar
->rx_work_urbs
);
351 if (IS_INITIALIZED(ar
)) {
352 carl9170_rx(ar
, urb
->transfer_buffer
,
356 usb_anchor_urb(urb
, &ar
->rx_pool
);
357 atomic_inc(&ar
->rx_pool_urbs
);
361 carl9170_usb_submit_rx_urb(ar
, GFP_ATOMIC
);
365 void carl9170_usb_handle_tx_err(struct ar9170
*ar
)
369 while ((urb
= usb_get_from_anchor(&ar
->tx_err
))) {
370 struct sk_buff
*skb
= (void *)urb
->context
;
372 carl9170_tx_drop(ar
, skb
);
373 carl9170_tx_callback(ar
, skb
);
378 static void carl9170_usb_tasklet(unsigned long data
)
380 struct ar9170
*ar
= (struct ar9170
*) data
;
382 if (!IS_INITIALIZED(ar
))
385 carl9170_usb_rx_work(ar
);
388 * Strictly speaking: The tx scheduler is not part of the USB system.
389 * But the rx worker returns frames back to the mac80211-stack and
390 * this is the _perfect_ place to generate the next transmissions.
393 carl9170_tx_scheduler(ar
);
396 static void carl9170_usb_rx_complete(struct urb
*urb
)
398 struct ar9170
*ar
= (struct ar9170
*)urb
->context
;
401 if (WARN_ON_ONCE(!ar
))
404 atomic_dec(&ar
->rx_anch_urbs
);
406 switch (urb
->status
) {
409 usb_anchor_urb(urb
, &ar
->rx_work
);
410 atomic_inc(&ar
->rx_work_urbs
);
417 /* handle disconnect events*/
421 /* handle all other errors */
422 usb_anchor_urb(urb
, &ar
->rx_pool
);
423 atomic_inc(&ar
->rx_pool_urbs
);
427 err
= carl9170_usb_submit_rx_urb(ar
, GFP_ATOMIC
);
430 * usb_submit_rx_urb reported a problem.
431 * In case this is due to a rx buffer shortage,
432 * elevate the tasklet worker priority to
433 * the highest available level.
435 tasklet_hi_schedule(&ar
->usb_tasklet
);
437 if (atomic_read(&ar
->rx_anch_urbs
) == 0) {
439 * The system is too slow to cope with
440 * the enormous workload. We have simply
441 * run out of active rx urbs and this
442 * unfortunately leads to an unpredictable
446 ieee80211_queue_work(ar
->hw
, &ar
->ping_work
);
450 * Using anything less than _high_ priority absolutely
451 * kills the rx performance my UP-System...
453 tasklet_hi_schedule(&ar
->usb_tasklet
);
457 static struct urb
*carl9170_usb_alloc_rx_urb(struct ar9170
*ar
, gfp_t gfp
)
462 buf
= kmalloc(ar
->fw
.rx_size
, gfp
);
466 urb
= usb_alloc_urb(0, gfp
);
472 usb_fill_bulk_urb(urb
, ar
->udev
, usb_rcvbulkpipe(ar
->udev
,
473 AR9170_USB_EP_RX
), buf
, ar
->fw
.rx_size
,
474 carl9170_usb_rx_complete
, ar
);
476 urb
->transfer_flags
|= URB_FREE_BUFFER
;
481 static int carl9170_usb_send_rx_irq_urb(struct ar9170
*ar
)
483 struct urb
*urb
= NULL
;
487 urb
= usb_alloc_urb(0, GFP_KERNEL
);
491 ibuf
= kmalloc(AR9170_USB_EP_CTRL_MAX
, GFP_KERNEL
);
495 usb_fill_int_urb(urb
, ar
->udev
, usb_rcvintpipe(ar
->udev
,
496 AR9170_USB_EP_IRQ
), ibuf
, AR9170_USB_EP_CTRL_MAX
,
497 carl9170_usb_rx_irq_complete
, ar
, 1);
499 urb
->transfer_flags
|= URB_FREE_BUFFER
;
501 usb_anchor_urb(urb
, &ar
->rx_anch
);
502 err
= usb_submit_urb(urb
, GFP_KERNEL
);
504 usb_unanchor_urb(urb
);
511 static int carl9170_usb_init_rx_bulk_urbs(struct ar9170
*ar
)
514 int i
, err
= -EINVAL
;
517 * The driver actively maintains a second shadow
518 * pool for inactive, but fully-prepared rx urbs.
520 * The pool should help the driver to master huge
521 * workload spikes without running the risk of
522 * undersupplying the hardware or wasting time by
523 * processing rx data (streams) inside the urb
524 * completion (hardirq context).
526 for (i
= 0; i
< AR9170_NUM_RX_URBS_POOL
; i
++) {
527 urb
= carl9170_usb_alloc_rx_urb(ar
, GFP_KERNEL
);
533 usb_anchor_urb(urb
, &ar
->rx_pool
);
534 atomic_inc(&ar
->rx_pool_urbs
);
538 err
= carl9170_usb_submit_rx_urb(ar
, GFP_KERNEL
);
542 /* the device now waiting for the firmware. */
543 carl9170_set_state_when(ar
, CARL9170_STOPPED
, CARL9170_IDLE
);
548 usb_scuttle_anchored_urbs(&ar
->rx_pool
);
549 usb_scuttle_anchored_urbs(&ar
->rx_work
);
550 usb_kill_anchored_urbs(&ar
->rx_anch
);
554 static int carl9170_usb_flush(struct ar9170
*ar
)
559 while ((urb
= usb_get_from_anchor(&ar
->tx_wait
))) {
560 struct sk_buff
*skb
= (void *)urb
->context
;
561 carl9170_tx_drop(ar
, skb
);
562 carl9170_tx_callback(ar
, skb
);
566 ret
= usb_wait_anchor_empty_timeout(&ar
->tx_cmd
, 1000);
570 /* lets wait a while until the tx - queues are dried out */
571 ret
= usb_wait_anchor_empty_timeout(&ar
->tx_anch
, 1000);
575 usb_kill_anchored_urbs(&ar
->tx_anch
);
576 carl9170_usb_handle_tx_err(ar
);
581 static void carl9170_usb_cancel_urbs(struct ar9170
*ar
)
585 carl9170_set_state(ar
, CARL9170_UNKNOWN_STATE
);
587 err
= carl9170_usb_flush(ar
);
589 dev_err(&ar
->udev
->dev
, "stuck tx urbs!\n");
591 usb_poison_anchored_urbs(&ar
->tx_anch
);
592 carl9170_usb_handle_tx_err(ar
);
593 usb_poison_anchored_urbs(&ar
->rx_anch
);
595 tasklet_kill(&ar
->usb_tasklet
);
597 usb_scuttle_anchored_urbs(&ar
->rx_work
);
598 usb_scuttle_anchored_urbs(&ar
->rx_pool
);
599 usb_scuttle_anchored_urbs(&ar
->tx_cmd
);
602 int __carl9170_exec_cmd(struct ar9170
*ar
, struct carl9170_cmd
*cmd
,
608 if (!IS_INITIALIZED(ar
)) {
613 if (WARN_ON(cmd
->hdr
.len
> CARL9170_MAX_CMD_LEN
- 4)) {
618 urb
= usb_alloc_urb(0, GFP_ATOMIC
);
624 usb_fill_int_urb(urb
, ar
->udev
, usb_sndintpipe(ar
->udev
,
625 AR9170_USB_EP_CMD
), cmd
, cmd
->hdr
.len
+ 4,
626 carl9170_usb_cmd_complete
, ar
, 1);
629 urb
->transfer_flags
|= URB_FREE_BUFFER
;
631 usb_anchor_urb(urb
, &ar
->tx_cmd
);
634 return carl9170_usb_submit_cmd_urb(ar
);
643 int carl9170_exec_cmd(struct ar9170
*ar
, const enum carl9170_cmd_oids cmd
,
644 unsigned int plen
, void *payload
, unsigned int outlen
, void *out
)
648 if (!IS_ACCEPTING_CMD(ar
))
651 if (!(cmd
& CARL9170_CMD_ASYNC_FLAG
))
654 ar
->cmd
.hdr
.len
= plen
;
655 ar
->cmd
.hdr
.cmd
= cmd
;
656 /* writing multiple regs fills this buffer already */
657 if (plen
&& payload
!= (u8
*)(ar
->cmd
.data
))
658 memcpy(ar
->cmd
.data
, payload
, plen
);
660 spin_lock_bh(&ar
->cmd_lock
);
661 ar
->readbuf
= (u8
*)out
;
662 ar
->readlen
= outlen
;
663 spin_unlock_bh(&ar
->cmd_lock
);
665 err
= __carl9170_exec_cmd(ar
, &ar
->cmd
, false);
667 if (!(cmd
& CARL9170_CMD_ASYNC_FLAG
)) {
668 err
= wait_for_completion_timeout(&ar
->cmd_wait
, HZ
);
674 if (ar
->readlen
!= outlen
) {
683 /* Maybe the device was removed in the moment we were waiting? */
684 if (IS_STARTED(ar
)) {
685 dev_err(&ar
->udev
->dev
, "no command feedback "
686 "received (%d).\n", err
);
688 /* provide some maybe useful debug information */
689 print_hex_dump_bytes("carl9170 cmd: ", DUMP_PREFIX_NONE
,
692 carl9170_restart(ar
, CARL9170_RR_COMMAND_TIMEOUT
);
695 /* invalidate to avoid completing the next command prematurely */
696 spin_lock_bh(&ar
->cmd_lock
);
699 spin_unlock_bh(&ar
->cmd_lock
);
704 void carl9170_usb_tx(struct ar9170
*ar
, struct sk_buff
*skb
)
707 struct ar9170_stream
*tx_stream
;
714 urb
= usb_alloc_urb(0, GFP_ATOMIC
);
718 if (ar
->fw
.tx_stream
) {
719 tx_stream
= (void *) (skb
->data
- sizeof(*tx_stream
));
721 len
= skb
->len
+ sizeof(*tx_stream
);
722 tx_stream
->length
= cpu_to_le16(len
);
723 tx_stream
->tag
= cpu_to_le16(AR9170_TX_STREAM_TAG
);
730 usb_fill_bulk_urb(urb
, ar
->udev
, usb_sndbulkpipe(ar
->udev
,
731 AR9170_USB_EP_TX
), data
, len
,
732 carl9170_usb_tx_data_complete
, skb
);
734 urb
->transfer_flags
|= URB_ZERO_PACKET
;
736 usb_anchor_urb(urb
, &ar
->tx_wait
);
740 carl9170_usb_submit_data_urb(ar
);
744 carl9170_tx_drop(ar
, skb
);
745 carl9170_tx_callback(ar
, skb
);
748 static void carl9170_release_firmware(struct ar9170
*ar
)
751 release_firmware(ar
->fw
.fw
);
752 memset(&ar
->fw
, 0, sizeof(ar
->fw
));
756 void carl9170_usb_stop(struct ar9170
*ar
)
760 carl9170_set_state_when(ar
, CARL9170_IDLE
, CARL9170_STOPPED
);
762 ret
= carl9170_usb_flush(ar
);
764 dev_err(&ar
->udev
->dev
, "kill pending tx urbs.\n");
766 usb_poison_anchored_urbs(&ar
->tx_anch
);
767 carl9170_usb_handle_tx_err(ar
);
769 /* kill any pending command */
770 spin_lock_bh(&ar
->cmd_lock
);
772 spin_unlock_bh(&ar
->cmd_lock
);
773 complete_all(&ar
->cmd_wait
);
775 /* This is required to prevent an early completion on _start */
776 INIT_COMPLETION(ar
->cmd_wait
);
780 * So far we freed all tx urbs, but we won't dare to touch any rx urbs.
781 * Else we would end up with a unresponsive device...
785 int carl9170_usb_open(struct ar9170
*ar
)
787 usb_unpoison_anchored_urbs(&ar
->tx_anch
);
789 carl9170_set_state_when(ar
, CARL9170_STOPPED
, CARL9170_IDLE
);
793 static int carl9170_usb_load_firmware(struct ar9170
*ar
)
797 unsigned int transfer
;
802 buf
= kmalloc(4096, GFP_KERNEL
);
808 data
= ar
->fw
.fw
->data
;
809 len
= ar
->fw
.fw
->size
;
810 addr
= ar
->fw
.address
;
812 /* this removes the miniboot image */
813 data
+= ar
->fw
.offset
;
814 len
-= ar
->fw
.offset
;
817 transfer
= min_t(unsigned int, len
, 4096u);
818 memcpy(buf
, data
, transfer
);
820 err
= usb_control_msg(ar
->udev
, usb_sndctrlpipe(ar
->udev
, 0),
821 0x30 /* FW DL */, 0x40 | USB_DIR_OUT
,
822 addr
>> 8, 0, buf
, transfer
, 100);
835 err
= usb_control_msg(ar
->udev
, usb_sndctrlpipe(ar
->udev
, 0),
836 0x31 /* FW DL COMPLETE */,
837 0x40 | USB_DIR_OUT
, 0, 0, NULL
, 0, 200);
839 if (wait_for_completion_timeout(&ar
->fw_boot_wait
, HZ
) == 0) {
844 err
= carl9170_echo_test(ar
, 0x4a110123);
848 /* now, start the command response counter */
854 dev_err(&ar
->udev
->dev
, "firmware upload failed (%d).\n", err
);
858 int carl9170_usb_restart(struct ar9170
*ar
)
862 if (ar
->intf
->condition
!= USB_INTERFACE_BOUND
)
866 * Disable the command response sequence counter check.
867 * We already know that the device/firmware is in a bad state.
868 * So, no extra points are awarded to anyone who reminds the
873 err
= carl9170_reboot(ar
);
875 carl9170_usb_stop(ar
);
880 tasklet_schedule(&ar
->usb_tasklet
);
882 /* The reboot procedure can take quite a while to complete. */
885 err
= carl9170_usb_open(ar
);
889 err
= carl9170_usb_load_firmware(ar
);
896 carl9170_usb_cancel_urbs(ar
);
900 void carl9170_usb_reset(struct ar9170
*ar
)
903 * This is the last resort to get the device going again
904 * without any *user replugging action*.
906 * But there is a catch: usb_reset really is like a physical
907 * *reconnect*. The mac80211 state will be lost in the process.
908 * Therefore a userspace application, which is monitoring
909 * the link must step in.
911 carl9170_usb_cancel_urbs(ar
);
913 carl9170_usb_stop(ar
);
915 usb_queue_reset_device(ar
->intf
);
918 static int carl9170_usb_init_device(struct ar9170
*ar
)
923 * The carl9170 firmware let's the driver know when it's
924 * ready for action. But we have to be prepared to gracefully
925 * handle all spurious [flushed] messages after each (re-)boot.
926 * Thus the command response counter remains disabled until it
927 * can be safely synchronized.
931 err
= carl9170_usb_send_rx_irq_urb(ar
);
935 err
= carl9170_usb_init_rx_bulk_urbs(ar
);
939 err
= carl9170_usb_open(ar
);
943 mutex_lock(&ar
->mutex
);
944 err
= carl9170_usb_load_firmware(ar
);
945 mutex_unlock(&ar
->mutex
);
952 carl9170_usb_stop(ar
);
955 carl9170_usb_cancel_urbs(ar
);
961 static void carl9170_usb_firmware_failed(struct ar9170
*ar
)
963 struct device
*parent
= ar
->udev
->dev
.parent
;
964 struct usb_device
*udev
;
967 * Store a copy of the usb_device pointer locally.
968 * This is because device_release_driver initiates
969 * carl9170_usb_disconnect, which in turn frees our
970 * driver context (ar).
974 complete(&ar
->fw_load_wait
);
976 /* unbind anything failed */
980 device_release_driver(&udev
->dev
);
982 device_unlock(parent
);
987 static void carl9170_usb_firmware_finish(struct ar9170
*ar
)
991 err
= carl9170_parse_firmware(ar
);
995 err
= carl9170_usb_init_device(ar
);
999 err
= carl9170_register(ar
);
1001 carl9170_usb_stop(ar
);
1005 complete(&ar
->fw_load_wait
);
1006 usb_put_dev(ar
->udev
);
1010 carl9170_usb_cancel_urbs(ar
);
1013 carl9170_release_firmware(ar
);
1014 carl9170_usb_firmware_failed(ar
);
1017 static void carl9170_usb_firmware_step2(const struct firmware
*fw
,
1020 struct ar9170
*ar
= context
;
1024 carl9170_usb_firmware_finish(ar
);
1028 dev_err(&ar
->udev
->dev
, "firmware not found.\n");
1029 carl9170_usb_firmware_failed(ar
);
1032 static int carl9170_usb_probe(struct usb_interface
*intf
,
1033 const struct usb_device_id
*id
)
1036 struct usb_device
*udev
;
1039 err
= usb_reset_device(interface_to_usbdev(intf
));
1043 ar
= carl9170_alloc(sizeof(*ar
));
1047 udev
= interface_to_usbdev(intf
);
1051 ar
->features
= id
->driver_info
;
1053 usb_set_intfdata(intf
, ar
);
1054 SET_IEEE80211_DEV(ar
->hw
, &intf
->dev
);
1056 init_usb_anchor(&ar
->rx_anch
);
1057 init_usb_anchor(&ar
->rx_pool
);
1058 init_usb_anchor(&ar
->rx_work
);
1059 init_usb_anchor(&ar
->tx_wait
);
1060 init_usb_anchor(&ar
->tx_anch
);
1061 init_usb_anchor(&ar
->tx_cmd
);
1062 init_usb_anchor(&ar
->tx_err
);
1063 init_completion(&ar
->cmd_wait
);
1064 init_completion(&ar
->fw_boot_wait
);
1065 init_completion(&ar
->fw_load_wait
);
1066 tasklet_init(&ar
->usb_tasklet
, carl9170_usb_tasklet
,
1069 atomic_set(&ar
->tx_cmd_urbs
, 0);
1070 atomic_set(&ar
->tx_anch_urbs
, 0);
1071 atomic_set(&ar
->rx_work_urbs
, 0);
1072 atomic_set(&ar
->rx_anch_urbs
, 0);
1073 atomic_set(&ar
->rx_pool_urbs
, 0);
1075 usb_get_dev(ar
->udev
);
1077 carl9170_set_state(ar
, CARL9170_STOPPED
);
1079 return request_firmware_nowait(THIS_MODULE
, 1, CARL9170FW_NAME
,
1080 &ar
->udev
->dev
, GFP_KERNEL
, ar
, carl9170_usb_firmware_step2
);
1083 static void carl9170_usb_disconnect(struct usb_interface
*intf
)
1085 struct ar9170
*ar
= usb_get_intfdata(intf
);
1086 struct usb_device
*udev
;
1092 wait_for_completion(&ar
->fw_load_wait
);
1094 if (IS_INITIALIZED(ar
)) {
1095 carl9170_reboot(ar
);
1096 carl9170_usb_stop(ar
);
1099 carl9170_usb_cancel_urbs(ar
);
1100 carl9170_unregister(ar
);
1102 usb_set_intfdata(intf
, NULL
);
1104 carl9170_release_firmware(ar
);
1110 static int carl9170_usb_suspend(struct usb_interface
*intf
,
1111 pm_message_t message
)
1113 struct ar9170
*ar
= usb_get_intfdata(intf
);
1118 carl9170_usb_cancel_urbs(ar
);
1123 static int carl9170_usb_resume(struct usb_interface
*intf
)
1125 struct ar9170
*ar
= usb_get_intfdata(intf
);
1131 usb_unpoison_anchored_urbs(&ar
->rx_anch
);
1132 carl9170_set_state(ar
, CARL9170_STOPPED
);
1135 * The USB documentation demands that [for suspend] all traffic
1136 * to and from the device has to stop. This would be fine, but
1137 * there's a catch: the device[usb phy] does not come back.
1139 * Upon resume the firmware will "kill" itself and the
1140 * boot-code sorts out the magic voodoo.
1141 * Not very nice, but there's not much what could go wrong.
1145 err
= carl9170_usb_init_device(ar
);
1152 carl9170_usb_cancel_urbs(ar
);
1156 #endif /* CONFIG_PM */
1158 static struct usb_driver carl9170_driver
= {
1159 .name
= KBUILD_MODNAME
,
1160 .probe
= carl9170_usb_probe
,
1161 .disconnect
= carl9170_usb_disconnect
,
1162 .id_table
= carl9170_usb_ids
,
1165 .suspend
= carl9170_usb_suspend
,
1166 .resume
= carl9170_usb_resume
,
1167 .reset_resume
= carl9170_usb_resume
,
1168 #endif /* CONFIG_PM */
1169 .disable_hub_initiated_lpm
= 1,
1172 module_usb_driver(carl9170_driver
);