summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/ath/ath6kl/usb.c
blob: 3afc5a463d06f822f339250deecfb1cefadea592 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
/*
 * Copyright (c) 2007-2011 Atheros Communications Inc.
 * Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/module.h>
#include <linux/usb.h>

#include "debug.h"
#include "core.h"

/* constants */
#define TX_URB_COUNT            32
#define RX_URB_COUNT            32
#define ATH6KL_USB_RX_BUFFER_SIZE  4096

/* tx/rx pipes for usb */
enum ATH6KL_USB_PIPE_ID {
	ATH6KL_USB_PIPE_TX_CTRL = 0,
	ATH6KL_USB_PIPE_TX_DATA_LP,
	ATH6KL_USB_PIPE_TX_DATA_MP,
	ATH6KL_USB_PIPE_TX_DATA_HP,
	ATH6KL_USB_PIPE_RX_CTRL,
	ATH6KL_USB_PIPE_RX_DATA,
	ATH6KL_USB_PIPE_RX_DATA2,
	ATH6KL_USB_PIPE_RX_INT,
	ATH6KL_USB_PIPE_MAX
};

#define ATH6KL_USB_PIPE_INVALID ATH6KL_USB_PIPE_MAX

struct ath6kl_usb_pipe {
	struct list_head urb_list_head;
	struct usb_anchor urb_submitted;
	u32 urb_alloc;
	u32 urb_cnt;
	u32 urb_cnt_thresh;
	unsigned int usb_pipe_handle;
	u32 flags;
	u8 ep_address;
	u8 logical_pipe_num;
	struct ath6kl_usb *ar_usb;
	u16 max_packet_size;
	struct work_struct io_complete_work;
	struct sk_buff_head io_comp_queue;
	struct usb_endpoint_descriptor *ep_desc;
};

#define ATH6KL_USB_PIPE_FLAG_TX    (1 << 0)

/* usb device object */
struct ath6kl_usb {
	/* protects pipe->urb_list_head and  pipe->urb_cnt */
	spinlock_t cs_lock;

	struct usb_device *udev;
	struct usb_interface *interface;
	struct ath6kl_usb_pipe pipes[ATH6KL_USB_PIPE_MAX];
	u8 *diag_cmd_buffer;
	u8 *diag_resp_buffer;
	struct ath6kl *ar;
};

/* usb urb object */
struct ath6kl_urb_context {
	struct list_head link;
	struct ath6kl_usb_pipe *pipe;
	struct sk_buff *skb;
	struct ath6kl *ar;
};

/* USB endpoint definitions */
#define ATH6KL_USB_EP_ADDR_APP_CTRL_IN          0x81
#define ATH6KL_USB_EP_ADDR_APP_DATA_IN          0x82
#define ATH6KL_USB_EP_ADDR_APP_DATA2_IN         0x83
#define ATH6KL_USB_EP_ADDR_APP_INT_IN           0x84

#define ATH6KL_USB_EP_ADDR_APP_CTRL_OUT         0x01
#define ATH6KL_USB_EP_ADDR_APP_DATA_LP_OUT      0x02
#define ATH6KL_USB_EP_ADDR_APP_DATA_MP_OUT      0x03
#define ATH6KL_USB_EP_ADDR_APP_DATA_HP_OUT      0x04

/* diagnostic command defnitions */
#define ATH6KL_USB_CONTROL_REQ_SEND_BMI_CMD        1
#define ATH6KL_USB_CONTROL_REQ_RECV_BMI_RESP       2
#define ATH6KL_USB_CONTROL_REQ_DIAG_CMD            3
#define ATH6KL_USB_CONTROL_REQ_DIAG_RESP           4

#define ATH6KL_USB_CTRL_DIAG_CC_READ               0
#define ATH6KL_USB_CTRL_DIAG_CC_WRITE              1

struct ath6kl_usb_ctrl_diag_cmd_write {
	__le32 cmd;
	__le32 address;
	__le32 value;
	__le32 _pad[1];
} __packed;

struct ath6kl_usb_ctrl_diag_cmd_read {
	__le32 cmd;
	__le32 address;
} __packed;

struct ath6kl_usb_ctrl_diag_resp_read {
	__le32 value;
} __packed;

/* function declarations */
static void ath6kl_usb_recv_complete(struct urb *urb);

#define ATH6KL_USB_IS_BULK_EP(attr) (((attr) & 3) == 0x02)
#define ATH6KL_USB_IS_INT_EP(attr)  (((attr) & 3) == 0x03)
#define ATH6KL_USB_IS_ISOC_EP(attr)  (((attr) & 3) == 0x01)
#define ATH6KL_USB_IS_DIR_IN(addr)  ((addr) & 0x80)

/* pipe/urb operations */
static struct ath6kl_urb_context *
ath6kl_usb_alloc_urb_from_pipe(struct ath6kl_usb_pipe *pipe)
{
	struct ath6kl_urb_context *urb_context = NULL;
	unsigned long flags;

	spin_lock_irqsave(&pipe->ar_usb->cs_lock, flags);
	if (!list_empty(&pipe->urb_list_head)) {
		urb_context =
		    list_first_entry(&pipe->urb_list_head,
				     struct ath6kl_urb_context, link);
		list_del(&urb_context->link);
		pipe->urb_cnt--;
	}
	spin_unlock_irqrestore(&pipe->ar_usb->cs_lock, flags);

	return urb_context;
}

static void ath6kl_usb_free_urb_to_pipe(struct ath6kl_usb_pipe *pipe,
					struct ath6kl_urb_context *urb_context)
{
	unsigned long flags;

	spin_lock_irqsave(&pipe->ar_usb->cs_lock, flags);
	pipe->urb_cnt++;

	list_add(&urb_context->link, &pipe->urb_list_head);
	spin_unlock_irqrestore(&pipe->ar_usb->cs_lock, flags);
}

static void ath6kl_usb_cleanup_recv_urb(struct ath6kl_urb_context *urb_context)
{
	dev_kfree_skb(urb_context->skb);
	urb_context->skb = NULL;

	ath6kl_usb_free_urb_to_pipe(urb_context->pipe, urb_context);
}

static inline struct ath6kl_usb *ath6kl_usb_priv(struct ath6kl *ar)
{
	return ar->hif_priv;
}

/* pipe resource allocation/cleanup */
static int ath6kl_usb_alloc_pipe_resources(struct ath6kl_usb_pipe *pipe,
					   int urb_cnt)
{
	struct ath6kl_urb_context *urb_context;
	int status = 0, i;

	INIT_LIST_HEAD(&pipe->urb_list_head);
	init_usb_anchor(&pipe->urb_submitted);

	for (i = 0; i < urb_cnt; i++) {
		urb_context = kzalloc(sizeof(struct ath6kl_urb_context),
				      GFP_KERNEL);
		if (urb_context == NULL) {
			status = -ENOMEM;
			goto fail_alloc_pipe_resources;
		}

		urb_context->pipe = pipe;

		/*
		 * we are only allocate the urb contexts here, the actual URB
		 * is allocated from the kernel as needed to do a transaction
		 */
		pipe->urb_alloc++;
		ath6kl_usb_free_urb_to_pipe(pipe, urb_context);
	}

	ath6kl_dbg(ATH6KL_DBG_USB,
		   "ath6kl usb: alloc resources lpipe:%d hpipe:0x%X urbs:%d\n",
		   pipe->logical_pipe_num, pipe->usb_pipe_handle,
		   pipe->urb_alloc);

fail_alloc_pipe_resources:
	return status;
}

static void ath6kl_usb_free_pipe_resources(struct ath6kl_usb_pipe *pipe)
{
	struct ath6kl_urb_context *urb_context;

	if (pipe->ar_usb == NULL) {
		/* nothing allocated for this pipe */
		return;
	}

	ath6kl_dbg(ATH6KL_DBG_USB,
		   "ath6kl usb: free resources lpipe:%d"
		   "hpipe:0x%X urbs:%d avail:%d\n",
		   pipe->logical_pipe_num, pipe->usb_pipe_handle,
		   pipe->urb_alloc, pipe->urb_cnt);

	if (pipe->urb_alloc != pipe->urb_cnt) {
		ath6kl_dbg(ATH6KL_DBG_USB,
			   "ath6kl usb: urb leak! lpipe:%d"
			   "hpipe:0x%X urbs:%d avail:%d\n",
			   pipe->logical_pipe_num, pipe->usb_pipe_handle,
			   pipe->urb_alloc, pipe->urb_cnt);
	}

	while (true) {
		urb_context = ath6kl_usb_alloc_urb_from_pipe(pipe);
		if (urb_context == NULL)
			break;
		kfree(urb_context);
	}
}

static void ath6kl_usb_cleanup_pipe_resources(struct ath6kl_usb *ar_usb)
{
	int i;

	for (i = 0; i < ATH6KL_USB_PIPE_MAX; i++)
		ath6kl_usb_free_pipe_resources(&ar_usb->pipes[i]);
}

static u8 ath6kl_usb_get_logical_pipe_num(struct ath6kl_usb *ar_usb,
					  u8 ep_address, int *urb_count)
{
	u8 pipe_num = ATH6KL_USB_PIPE_INVALID;

	switch (ep_address) {
	case ATH6KL_USB_EP_ADDR_APP_CTRL_IN:
		pipe_num = ATH6KL_USB_PIPE_RX_CTRL;
		*urb_count = RX_URB_COUNT;
		break;
	case ATH6KL_USB_EP_ADDR_APP_DATA_IN:
		pipe_num = ATH6KL_USB_PIPE_RX_DATA;
		*urb_count = RX_URB_COUNT;
		break;
	case ATH6KL_USB_EP_ADDR_APP_INT_IN:
		pipe_num = ATH6KL_USB_PIPE_RX_INT;
		*urb_count = RX_URB_COUNT;
		break;
	case ATH6KL_USB_EP_ADDR_APP_DATA2_IN:
		pipe_num = ATH6KL_USB_PIPE_RX_DATA2;
		*urb_count = RX_URB_COUNT;
		break;
	case ATH6KL_USB_EP_ADDR_APP_CTRL_OUT:
		pipe_num = ATH6KL_USB_PIPE_TX_CTRL;
		*urb_count = TX_URB_COUNT;
		break;
	case ATH6KL_USB_EP_ADDR_APP_DATA_LP_OUT:
		pipe_num = ATH6KL_USB_PIPE_TX_DATA_LP;
		*urb_count = TX_URB_COUNT;
		break;
	case ATH6KL_USB_EP_ADDR_APP_DATA_MP_OUT:
		pipe_num = ATH6KL_USB_PIPE_TX_DATA_MP;
		*urb_count = TX_URB_COUNT;
		break;
	case ATH6KL_USB_EP_ADDR_APP_DATA_HP_OUT:
		pipe_num = ATH6KL_USB_PIPE_TX_DATA_HP;
		*urb_count = TX_URB_COUNT;
		break;
	default:
		/* note: there may be endpoints not currently used */
		break;
	}

	return pipe_num;
}

static int ath6kl_usb_setup_pipe_resources(struct ath6kl_usb *ar_usb)
{
	struct usb_interface *interface = ar_usb->interface;
	struct usb_host_interface *iface_desc = interface->cur_altsetting;
	struct usb_endpoint_descriptor *endpoint;
	struct ath6kl_usb_pipe *pipe;
	int i, urbcount, status = 0;
	u8 pipe_num;

	ath6kl_dbg(ATH6KL_DBG_USB, "setting up USB Pipes using interface\n");

	/* walk decriptors and setup pipes */
	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
		endpoint = &iface_desc->endpoint[i].desc;

		if (ATH6KL_USB_IS_BULK_EP(endpoint->bmAttributes)) {
			ath6kl_dbg(ATH6KL_DBG_USB,
				   "%s Bulk Ep:0x%2.2X maxpktsz:%d\n",
				   ATH6KL_USB_IS_DIR_IN
				   (endpoint->bEndpointAddress) ?
				   "RX" : "TX", endpoint->bEndpointAddress,
				   le16_to_cpu(endpoint->wMaxPacketSize));
		} else if (ATH6KL_USB_IS_INT_EP(endpoint->bmAttributes)) {
			ath6kl_dbg(ATH6KL_DBG_USB,
				   "%s Int Ep:0x%2.2X maxpktsz:%d interval:%d\n",
				   ATH6KL_USB_IS_DIR_IN
				   (endpoint->bEndpointAddress) ?
				   "RX" : "TX", endpoint->bEndpointAddress,
				   le16_to_cpu(endpoint->wMaxPacketSize),
				   endpoint->bInterval);
		} else if (ATH6KL_USB_IS_ISOC_EP(endpoint->bmAttributes)) {
			/* TODO for ISO */
			ath6kl_dbg(ATH6KL_DBG_USB,
				   "%s ISOC Ep:0x%2.2X maxpktsz:%d interval:%d\n",
				   ATH6KL_USB_IS_DIR_IN
				   (endpoint->bEndpointAddress) ?
				   "RX" : "TX", endpoint->bEndpointAddress,
				   le16_to_cpu(endpoint->wMaxPacketSize),
				   endpoint->bInterval);
		}
		urbcount = 0;

		pipe_num =
		    ath6kl_usb_get_logical_pipe_num(ar_usb,
						    endpoint->bEndpointAddress,
						    &urbcount);
		if (pipe_num == ATH6KL_USB_PIPE_INVALID)
			continue;

		pipe = &ar_usb->pipes[pipe_num];
		if (pipe->ar_usb != NULL) {
			/* hmmm..pipe was already setup */
			continue;
		}

		pipe->ar_usb = ar_usb;
		pipe->logical_pipe_num = pipe_num;
		pipe->ep_address = endpoint->bEndpointAddress;
		pipe->max_packet_size = le16_to_cpu(endpoint->wMaxPacketSize);

		if (ATH6KL_USB_IS_BULK_EP(endpoint->bmAttributes)) {
			if (ATH6KL_USB_IS_DIR_IN(pipe->ep_address)) {
				pipe->usb_pipe_handle =
				    usb_rcvbulkpipe(ar_usb->udev,
						    pipe->ep_address);
			} else {
				pipe->usb_pipe_handle =
				    usb_sndbulkpipe(ar_usb->udev,
						    pipe->ep_address);
			}
		} else if (ATH6KL_USB_IS_INT_EP(endpoint->bmAttributes)) {
			if (ATH6KL_USB_IS_DIR_IN(pipe->ep_address)) {
				pipe->usb_pipe_handle =
				    usb_rcvintpipe(ar_usb->udev,
						   pipe->ep_address);
			} else {
				pipe->usb_pipe_handle =
				    usb_sndintpipe(ar_usb->udev,
						   pipe->ep_address);
			}
		} else if (ATH6KL_USB_IS_ISOC_EP(endpoint->bmAttributes)) {
			/* TODO for ISO */
			if (ATH6KL_USB_IS_DIR_IN(pipe->ep_address)) {
				pipe->usb_pipe_handle =
				    usb_rcvisocpipe(ar_usb->udev,
						    pipe->ep_address);
			} else {
				pipe->usb_pipe_handle =
				    usb_sndisocpipe(ar_usb->udev,
						    pipe->ep_address);
			}
		}

		pipe->ep_desc = endpoint;

		if (!ATH6KL_USB_IS_DIR_IN(pipe->ep_address))
			pipe->flags |= ATH6KL_USB_PIPE_FLAG_TX;

		status = ath6kl_usb_alloc_pipe_resources(pipe, urbcount);
		if (status != 0)
			break;
	}

	return status;
}

/* pipe operations */
static void ath6kl_usb_post_recv_transfers(struct ath6kl_usb_pipe *recv_pipe,
					   int buffer_length)
{
	struct ath6kl_urb_context *urb_context;
	struct urb *urb;
	int usb_status;

	while (true) {
		urb_context = ath6kl_usb_alloc_urb_from_pipe(recv_pipe);
		if (urb_context == NULL)
			break;

		urb_context->skb = dev_alloc_skb(buffer_length);
		if (urb_context->skb == NULL)
			goto err_cleanup_urb;

		urb = usb_alloc_urb(0, GFP_ATOMIC);
		if (urb == NULL)
			goto err_cleanup_urb;

		usb_fill_bulk_urb(urb,
				  recv_pipe->ar_usb->udev,
				  recv_pipe->usb_pipe_handle,
				  urb_context->skb->data,
				  buffer_length,
				  ath6kl_usb_recv_complete, urb_context);

		ath6kl_dbg(ATH6KL_DBG_USB_BULK,
			   "ath6kl usb: bulk recv submit:%d, 0x%X (ep:0x%2.2X), %d bytes buf:0x%p\n",
			   recv_pipe->logical_pipe_num,
			   recv_pipe->usb_pipe_handle, recv_pipe->ep_address,
			   buffer_length, urb_context->skb);

		usb_anchor_urb(urb, &recv_pipe->urb_submitted);
		usb_status = usb_submit_urb(urb, GFP_ATOMIC);

		if (usb_status) {
			ath6kl_dbg(ATH6KL_DBG_USB_BULK,
				   "ath6kl usb : usb bulk recv failed %d\n",
				   usb_status);
			usb_unanchor_urb(urb);
			usb_free_urb(urb);
			goto err_cleanup_urb;
		}
		usb_free_urb(urb);
	}
	return;

err_cleanup_urb:
	ath6kl_usb_cleanup_recv_urb(urb_context);
	return;
}

static void ath6kl_usb_flush_all(struct ath6kl_usb *ar_usb)
{
	int i;

	for (i = 0; i < ATH6KL_USB_PIPE_MAX; i++) {
		if (ar_usb->pipes[i].ar_usb != NULL)
			usb_kill_anchored_urbs(&ar_usb->pipes[i].urb_submitted);
	}

	/*
	 * Flushing any pending I/O may schedule work this call will block
	 * until all scheduled work runs to completion.
	 */
	flush_scheduled_work();
}

static void ath6kl_usb_start_recv_pipes(struct ath6kl_usb *ar_usb)
{
	/*
	 * note: control pipe is no longer used
	 * ar_usb->pipes[ATH6KL_USB_PIPE_RX_CTRL].urb_cnt_thresh =
	 *      ar_usb->pipes[ATH6KL_USB_PIPE_RX_CTRL].urb_alloc/2;
	 * ath6kl_usb_post_recv_transfers(&ar_usb->
	 *		pipes[ATH6KL_USB_PIPE_RX_CTRL],
	 *		ATH6KL_USB_RX_BUFFER_SIZE);
	 */

	ar_usb->pipes[ATH6KL_USB_PIPE_RX_DATA].urb_cnt_thresh = 1;

	ath6kl_usb_post_recv_transfers(&ar_usb->pipes[ATH6KL_USB_PIPE_RX_DATA],
				       ATH6KL_USB_RX_BUFFER_SIZE);
}

/* hif usb rx/tx completion functions */
static void ath6kl_usb_recv_complete(struct urb *urb)
{
	struct ath6kl_urb_context *urb_context = urb->context;
	struct ath6kl_usb_pipe *pipe = urb_context->pipe;
	struct sk_buff *skb = NULL;
	int status = 0;

	ath6kl_dbg(ATH6KL_DBG_USB_BULK,
		   "%s: recv pipe: %d, stat:%d, len:%d urb:0x%p\n", __func__,
		   pipe->logical_pipe_num, urb->status, urb->actual_length,
		   urb);

	if (urb->status != 0) {
		status = -EIO;
		switch (urb->status) {
		case -ECONNRESET:
		case -ENOENT:
		case -ESHUTDOWN:
			/*
			 * no need to spew these errors when device
			 * removed or urb killed due to driver shutdown
			 */
			status = -ECANCELED;
			break;
		default:
			ath6kl_dbg(ATH6KL_DBG_USB_BULK,
				   "%s recv pipe: %d (ep:0x%2.2X), failed:%d\n",
				   __func__, pipe->logical_pipe_num,
				   pipe->ep_address, urb->status);
			break;
		}
		goto cleanup_recv_urb;
	}

	if (urb->actual_length == 0)
		goto cleanup_recv_urb;

	skb = urb_context->skb;

	/* we are going to pass it up */
	urb_context->skb = NULL;
	skb_put(skb, urb->actual_length);

	/* note: queue implements a lock */
	skb_queue_tail(&pipe->io_comp_queue, skb);
	schedule_work(&pipe->io_complete_work);

cleanup_recv_urb:
	ath6kl_usb_cleanup_recv_urb(urb_context);

	if (status == 0 &&
	    pipe->urb_cnt >= pipe->urb_cnt_thresh) {
		/* our free urbs are piling up, post more transfers */
		ath6kl_usb_post_recv_transfers(pipe, ATH6KL_USB_RX_BUFFER_SIZE);
	}
}

static void ath6kl_usb_usb_transmit_complete(struct urb *urb)
{
	struct ath6kl_urb_context *urb_context = urb->context;
	struct ath6kl_usb_pipe *pipe = urb_context->pipe;
	struct sk_buff *skb;

	ath6kl_dbg(ATH6KL_DBG_USB_BULK,
		   "%s: pipe: %d, stat:%d, len:%d\n",
		   __func__, pipe->logical_pipe_num, urb->status,
		   urb->actual_length);

	if (urb->status != 0) {
		ath6kl_dbg(ATH6KL_DBG_USB_BULK,
			   "%s:  pipe: %d, failed:%d\n",
			   __func__, pipe->logical_pipe_num, urb->status);
	}

	skb = urb_context->skb;
	urb_context->skb = NULL;
	ath6kl_usb_free_urb_to_pipe(urb_context->pipe, urb_context);

	/* note: queue implements a lock */
	skb_queue_tail(&pipe->io_comp_queue, skb);
	schedule_work(&pipe->io_complete_work);
}

static void ath6kl_usb_io_comp_work(struct work_struct *work)
{
	struct ath6kl_usb_pipe *pipe = container_of(work,
						    struct ath6kl_usb_pipe,
						    io_complete_work);
	struct ath6kl_usb *ar_usb;
	struct sk_buff *skb;

	ar_usb = pipe->ar_usb;

	while ((skb = skb_dequeue(&pipe->io_comp_queue))) {
		if (pipe->flags & ATH6KL_USB_PIPE_FLAG_TX) {
			ath6kl_dbg(ATH6KL_DBG_USB_BULK,
				   "ath6kl usb xmit callback buf:0x%p\n", skb);
			ath6kl_core_tx_complete(ar_usb->ar, skb);
		} else {
			ath6kl_dbg(ATH6KL_DBG_USB_BULK,
				   "ath6kl usb recv callback buf:0x%p\n", skb);
			ath6kl_core_rx_complete(ar_usb->ar, skb,
						pipe->logical_pipe_num);
		}
	}
}

#define ATH6KL_USB_MAX_DIAG_CMD (sizeof(struct ath6kl_usb_ctrl_diag_cmd_write))
#define ATH6KL_USB_MAX_DIAG_RESP (sizeof(struct ath6kl_usb_ctrl_diag_resp_read))

static void ath6kl_usb_destroy(struct ath6kl_usb *ar_usb)
{
	ath6kl_usb_flush_all(ar_usb);

	ath6kl_usb_cleanup_pipe_resources(ar_usb);

	usb_set_intfdata(ar_usb->interface, NULL);

	kfree(ar_usb->diag_cmd_buffer);
	kfree(ar_usb->diag_resp_buffer);

	kfree(ar_usb);
}

static struct ath6kl_usb *ath6kl_usb_create(struct usb_interface *interface)
{
	struct usb_device *dev = interface_to_usbdev(interface);
	struct ath6kl_usb *ar_usb;
	struct ath6kl_usb_pipe *pipe;
	int status = 0;
	int i;

	ar_usb = kzalloc(sizeof(struct ath6kl_usb), GFP_KERNEL);
	if (ar_usb == NULL)
		goto fail_ath6kl_usb_create;

	usb_set_intfdata(interface, ar_usb);
	spin_lock_init(&(ar_usb->cs_lock));
	ar_usb->udev = dev;
	ar_usb->interface = interface;

	for (i = 0; i < ATH6KL_USB_PIPE_MAX; i++) {
		pipe = &ar_usb->pipes[i];
		INIT_WORK(&pipe->io_complete_work,
			  ath6kl_usb_io_comp_work);
		skb_queue_head_init(&pipe->io_comp_queue);
	}

	ar_usb->diag_cmd_buffer = kzalloc(ATH6KL_USB_MAX_DIAG_CMD, GFP_KERNEL);
	if (ar_usb->diag_cmd_buffer == NULL) {
		status = -ENOMEM;
		goto fail_ath6kl_usb_create;
	}

	ar_usb->diag_resp_buffer = kzalloc(ATH6KL_USB_MAX_DIAG_RESP,
					   GFP_KERNEL);
	if (ar_usb->diag_resp_buffer == NULL) {
		status = -ENOMEM;
		goto fail_ath6kl_usb_create;
	}

	status = ath6kl_usb_setup_pipe_resources(ar_usb);

fail_ath6kl_usb_create:
	if (status != 0) {
		ath6kl_usb_destroy(ar_usb);
		ar_usb = NULL;
	}
	return ar_usb;
}

static void ath6kl_usb_device_detached(struct usb_interface *interface)
{
	struct ath6kl_usb *ar_usb;

	ar_usb = usb_get_intfdata(interface);
	if (ar_usb == NULL)
		return;

	ath6kl_stop_txrx(ar_usb->ar);

	/* Delay to wait for the target to reboot */
	mdelay(20);
	ath6kl_core_cleanup(ar_usb->ar);
	ath6kl_usb_destroy(ar_usb);
}

/* exported hif usb APIs for htc pipe */
static void hif_start(struct ath6kl *ar)
{
	struct ath6kl_usb *device = ath6kl_usb_priv(ar);
	int i;

	ath6kl_usb_start_recv_pipes(device);

	/* set the TX resource avail threshold for each TX pipe */
	for (i = ATH6KL_USB_PIPE_TX_CTRL;
	     i <= ATH6KL_USB_PIPE_TX_DATA_HP; i++) {
		device->pipes[i].urb_cnt_thresh =
		    device->pipes[i].urb_alloc / 2;
	}
}

static int ath6kl_usb_send(struct ath6kl *ar, u8 PipeID,
			   struct sk_buff *hdr_skb, struct sk_buff *skb)
{
	struct ath6kl_usb *device = ath6kl_usb_priv(ar);
	struct ath6kl_usb_pipe *pipe = &device->pipes[PipeID];
	struct ath6kl_urb_context *urb_context;
	int usb_status, status = 0;
	struct urb *urb;
	u8 *data;
	u32 len;

	ath6kl_dbg(ATH6KL_DBG_USB_BULK, "+%s pipe : %d, buf:0x%p\n",
		   __func__, PipeID, skb);

	urb_context = ath6kl_usb_alloc_urb_from_pipe(pipe);

	if (urb_context == NULL) {
		/*
		 * TODO: it is possible to run out of urbs if
		 * 2 endpoints map to the same pipe ID
		 */
		ath6kl_dbg(ATH6KL_DBG_USB_BULK,
			   "%s pipe:%d no urbs left. URB Cnt : %d\n",
			   __func__, PipeID, pipe->urb_cnt);
		status = -ENOMEM;
		goto fail_hif_send;
	}

	urb_context->skb = skb;

	data = skb->data;
	len = skb->len;

	urb = usb_alloc_urb(0, GFP_ATOMIC);
	if (urb == NULL) {
		status = -ENOMEM;
		ath6kl_usb_free_urb_to_pipe(urb_context->pipe,
					    urb_context);
		goto fail_hif_send;
	}

	usb_fill_bulk_urb(urb,
			  device->udev,
			  pipe->usb_pipe_handle,
			  data,
			  len,
			  ath6kl_usb_usb_transmit_complete, urb_context);

	if ((len % pipe->max_packet_size) == 0) {
		/* hit a max packet boundary on this pipe */
		urb->transfer_flags |= URB_ZERO_PACKET;
	}

	ath6kl_dbg(ATH6KL_DBG_USB_BULK,
		   "athusb bulk send submit:%d, 0x%X (ep:0x%2.2X), %d bytes\n",
		   pipe->logical_pipe_num, pipe->usb_pipe_handle,
		   pipe->ep_address, len);

	usb_anchor_urb(urb, &pipe->urb_submitted);
	usb_status = usb_submit_urb(urb, GFP_ATOMIC);

	if (usb_status) {
		ath6kl_dbg(ATH6KL_DBG_USB_BULK,
			   "ath6kl usb : usb bulk transmit failed %d\n",
			   usb_status);
		usb_unanchor_urb(urb);
		ath6kl_usb_free_urb_to_pipe(urb_context->pipe,
					    urb_context);
		status = -EINVAL;
	}
	usb_free_urb(urb);

fail_hif_send:
	return status;
}

static void hif_stop(struct ath6kl *ar)
{
	struct ath6kl_usb *device = ath6kl_usb_priv(ar);

	ath6kl_usb_flush_all(device);
}

static void ath6kl_usb_get_default_pipe(struct ath6kl *ar,
					u8 *ul_pipe, u8 *dl_pipe)
{
	*ul_pipe = ATH6KL_USB_PIPE_TX_CTRL;
	*dl_pipe = ATH6KL_USB_PIPE_RX_CTRL;
}

static int ath6kl_usb_map_service_pipe(struct ath6kl *ar, u16 svc_id,
				       u8 *ul_pipe, u8 *dl_pipe)
{
	int status = 0;

	switch (svc_id) {
	case HTC_CTRL_RSVD_SVC:
	case WMI_CONTROL_SVC:
		*ul_pipe = ATH6KL_USB_PIPE_TX_CTRL;
		/* due to large control packets, shift to data pipe */
		*dl_pipe = ATH6KL_USB_PIPE_RX_DATA;
		break;
	case WMI_DATA_BE_SVC:
	case WMI_DATA_BK_SVC:
		*ul_pipe = ATH6KL_USB_PIPE_TX_DATA_LP;
		/*
		* Disable rxdata2 directly, it will be enabled
		* if FW enable rxdata2
		*/
		*dl_pipe = ATH6KL_USB_PIPE_RX_DATA;
		break;
	case WMI_DATA_VI_SVC:

		if (ar->hw.flags & ATH6KL_HW_MAP_LP_ENDPOINT)
			*ul_pipe = ATH6KL_USB_PIPE_TX_DATA_LP;
		else
			*ul_pipe = ATH6KL_USB_PIPE_TX_DATA_MP;
		/*
		* Disable rxdata2 directly, it will be enabled
		* if FW enable rxdata2
		*/
		*dl_pipe = ATH6KL_USB_PIPE_RX_DATA;
		break;
	case WMI_DATA_VO_SVC:

		if (ar->hw.flags & ATH6KL_HW_MAP_LP_ENDPOINT)
			*ul_pipe = ATH6KL_USB_PIPE_TX_DATA_LP;
		else
			*ul_pipe = ATH6KL_USB_PIPE_TX_DATA_MP;
		/*
		* Disable rxdata2 directly, it will be enabled
		* if FW enable rxdata2
		*/
		*dl_pipe = ATH6KL_USB_PIPE_RX_DATA;
		break;
	default:
		status = -EPERM;
		break;
	}

	return status;
}

static u16 ath6kl_usb_get_free_queue_number(struct ath6kl *ar, u8 pipe_id)
{
	struct ath6kl_usb *device = ath6kl_usb_priv(ar);

	return device->pipes[pipe_id].urb_cnt;
}

static void hif_detach_htc(struct ath6kl *ar)
{
	struct ath6kl_usb *device = ath6kl_usb_priv(ar);

	ath6kl_usb_flush_all(device);
}

static int ath6kl_usb_submit_ctrl_out(struct ath6kl_usb *ar_usb,
				   u8 req, u16 value, u16 index, void *data,
				   u32 size)
{
	u8 *buf = NULL;
	int ret;

	if (size > 0) {
		buf = kmemdup(data, size, GFP_KERNEL);
		if (buf == NULL)
			return -ENOMEM;
	}

	/* note: if successful returns number of bytes transfered */
	ret = usb_control_msg(ar_usb->udev,
			      usb_sndctrlpipe(ar_usb->udev, 0),
			      req,
			      USB_DIR_OUT | USB_TYPE_VENDOR |
			      USB_RECIP_DEVICE, value, index, buf,
			      size, 1000);

	if (ret < 0) {
		ath6kl_warn("Failed to submit usb control message: %d\n", ret);
		kfree(buf);
		return ret;
	}

	kfree(buf);

	return 0;
}

static int ath6kl_usb_submit_ctrl_in(struct ath6kl_usb *ar_usb,
				  u8 req, u16 value, u16 index, void *data,
				  u32 size)
{
	u8 *buf = NULL;
	int ret;

	if (size > 0) {
		buf = kmalloc(size, GFP_KERNEL);
		if (buf == NULL)
			return -ENOMEM;
	}

	/* note: if successful returns number of bytes transfered */
	ret = usb_control_msg(ar_usb->udev,
				 usb_rcvctrlpipe(ar_usb->udev, 0),
				 req,
				 USB_DIR_IN | USB_TYPE_VENDOR |
				 USB_RECIP_DEVICE, value, index, buf,
				 size, 2 * HZ);

	if (ret < 0) {
		ath6kl_warn("Failed to read usb control message: %d\n", ret);
		kfree(buf);
		return ret;
	}

	memcpy((u8 *) data, buf, size);

	kfree(buf);

	return 0;
}

static int ath6kl_usb_ctrl_msg_exchange(struct ath6kl_usb *ar_usb,
				     u8 req_val, u8 *req_buf, u32 req_len,
				     u8 resp_val, u8 *resp_buf, u32 *resp_len)
{
	int ret;

	/* send command */
	ret = ath6kl_usb_submit_ctrl_out(ar_usb, req_val, 0, 0,
					 req_buf, req_len);

	if (ret != 0)
		return ret;

	if (resp_buf == NULL) {
		/* no expected response */
		return ret;
	}

	/* get response */
	ret = ath6kl_usb_submit_ctrl_in(ar_usb, resp_val, 0, 0,
					resp_buf, *resp_len);

	return ret;
}

static int ath6kl_usb_diag_read32(struct ath6kl *ar, u32 address, u32 *data)
{
	struct ath6kl_usb *ar_usb = ar->hif_priv;
	struct ath6kl_usb_ctrl_diag_resp_read *resp;
	struct ath6kl_usb_ctrl_diag_cmd_read *cmd;
	u32 resp_len;
	int ret;

	cmd = (struct ath6kl_usb_ctrl_diag_cmd_read *) ar_usb->diag_cmd_buffer;

	memset(cmd, 0, sizeof(*cmd));
	cmd->cmd = ATH6KL_USB_CTRL_DIAG_CC_READ;
	cmd->address = cpu_to_le32(address);
	resp_len = sizeof(*resp);

	ret = ath6kl_usb_ctrl_msg_exchange(ar_usb,
				ATH6KL_USB_CONTROL_REQ_DIAG_CMD,
				(u8 *) cmd,
				sizeof(struct ath6kl_usb_ctrl_diag_cmd_write),
				ATH6KL_USB_CONTROL_REQ_DIAG_RESP,
				ar_usb->diag_resp_buffer, &resp_len);

	if (ret) {
		ath6kl_warn("diag read32 failed: %d\n", ret);
		return ret;
	}

	resp = (struct ath6kl_usb_ctrl_diag_resp_read *)
		ar_usb->diag_resp_buffer;

	*data = le32_to_cpu(resp->value);

	return ret;
}

static int ath6kl_usb_diag_write32(struct ath6kl *ar, u32 address, __le32 data)
{
	struct ath6kl_usb *ar_usb = ar->hif_priv;
	struct ath6kl_usb_ctrl_diag_cmd_write *cmd;
	int ret;

	cmd = (struct ath6kl_usb_ctrl_diag_cmd_write *) ar_usb->diag_cmd_buffer;

	memset(cmd, 0, sizeof(struct ath6kl_usb_ctrl_diag_cmd_write));
	cmd->cmd = cpu_to_le32(ATH6KL_USB_CTRL_DIAG_CC_WRITE);
	cmd->address = cpu_to_le32(address);
	cmd->value = data;

	ret = ath6kl_usb_ctrl_msg_exchange(ar_usb,
					   ATH6KL_USB_CONTROL_REQ_DIAG_CMD,
					   (u8 *) cmd,
					   sizeof(*cmd),
					   0, NULL, NULL);
	if (ret) {
		ath6kl_warn("diag_write32 failed: %d\n", ret);
		return ret;
	}

	return 0;
}

static int ath6kl_usb_bmi_read(struct ath6kl *ar, u8 *buf, u32 len)
{
	struct ath6kl_usb *ar_usb = ar->hif_priv;
	int ret;

	/* get response */
	ret = ath6kl_usb_submit_ctrl_in(ar_usb,
					ATH6KL_USB_CONTROL_REQ_RECV_BMI_RESP,
					0, 0, buf, len);
	if (ret) {
		ath6kl_err("Unable to read the bmi data from the device: %d\n",
			   ret);
		return ret;
	}

	return 0;
}

static int ath6kl_usb_bmi_write(struct ath6kl *ar, u8 *buf, u32 len)
{
	struct ath6kl_usb *ar_usb = ar->hif_priv;
	int ret;

	/* send command */
	ret = ath6kl_usb_submit_ctrl_out(ar_usb,
					 ATH6KL_USB_CONTROL_REQ_SEND_BMI_CMD,
					 0, 0, buf, len);
	if (ret) {
		ath6kl_err("unable to send the bmi data to the device: %d\n",
			   ret);
		return ret;
	}

	return 0;
}

static int ath6kl_usb_power_on(struct ath6kl *ar)
{
	hif_start(ar);
	return 0;
}

static int ath6kl_usb_power_off(struct ath6kl *ar)
{
	hif_detach_htc(ar);
	return 0;
}

static void ath6kl_usb_stop(struct ath6kl *ar)
{
	hif_stop(ar);
}

static void ath6kl_usb_cleanup_scatter(struct ath6kl *ar)
{
	/*
	 * USB doesn't support it. Just return.
	 */
	return;
}

static int ath6kl_usb_suspend(struct ath6kl *ar, struct cfg80211_wowlan *wow)
{
	/*
	 * cfg80211 suspend/WOW currently not supported for USB.
	 */
	return 0;
}

static int ath6kl_usb_resume(struct ath6kl *ar)
{
	/*
	 * cfg80211 resume currently not supported for USB.
	 */
	return 0;
}

static const struct ath6kl_hif_ops ath6kl_usb_ops = {
	.diag_read32 = ath6kl_usb_diag_read32,
	.diag_write32 = ath6kl_usb_diag_write32,
	.bmi_read = ath6kl_usb_bmi_read,
	.bmi_write = ath6kl_usb_bmi_write,
	.power_on = ath6kl_usb_power_on,
	.power_off = ath6kl_usb_power_off,
	.stop = ath6kl_usb_stop,
	.pipe_send = ath6kl_usb_send,
	.pipe_get_default = ath6kl_usb_get_default_pipe,
	.pipe_map_service = ath6kl_usb_map_service_pipe,
	.pipe_get_free_queue_number = ath6kl_usb_get_free_queue_number,
	.cleanup_scatter = ath6kl_usb_cleanup_scatter,
	.suspend = ath6kl_usb_suspend,
	.resume = ath6kl_usb_resume,
};

/* ath6kl usb driver registered functions */
static int ath6kl_usb_probe(struct usb_interface *interface,
			    const struct usb_device_id *id)
{
	struct usb_device *dev = interface_to_usbdev(interface);
	struct ath6kl *ar;
	struct ath6kl_usb *ar_usb = NULL;
	int vendor_id, product_id;
	int ret = 0;

	usb_get_dev(dev);

	vendor_id = le16_to_cpu(dev->descriptor.idVendor);
	product_id = le16_to_cpu(dev->descriptor.idProduct);

	ath6kl_dbg(ATH6KL_DBG_USB, "vendor_id = %04x\n", vendor_id);
	ath6kl_dbg(ATH6KL_DBG_USB, "product_id = %04x\n", product_id);

	if (interface->cur_altsetting)
		ath6kl_dbg(ATH6KL_DBG_USB, "USB Interface %d\n",
			   interface->cur_altsetting->desc.bInterfaceNumber);


	if (dev->speed == USB_SPEED_HIGH)
		ath6kl_dbg(ATH6KL_DBG_USB, "USB 2.0 Host\n");
	else
		ath6kl_dbg(ATH6KL_DBG_USB, "USB 1.1 Host\n");

	ar_usb = ath6kl_usb_create(interface);

	if (ar_usb == NULL) {
		ret = -ENOMEM;
		goto err_usb_put;
	}

	ar = ath6kl_core_create(&ar_usb->udev->dev);
	if (ar == NULL) {
		ath6kl_err("Failed to alloc ath6kl core\n");
		ret = -ENOMEM;
		goto err_usb_destroy;
	}

	ar->hif_priv = ar_usb;
	ar->hif_type = ATH6KL_HIF_TYPE_USB;
	ar->hif_ops = &ath6kl_usb_ops;
	ar->mbox_info.block_size = 16;
	ar->bmi.max_data_size = 252;

	ar_usb->ar = ar;

	ret = ath6kl_core_init(ar, ATH6KL_HTC_TYPE_PIPE);
	if (ret) {
		ath6kl_err("Failed to init ath6kl core: %d\n", ret);
		goto err_core_free;
	}

	return ret;

err_core_free:
	ath6kl_core_destroy(ar);
err_usb_destroy:
	ath6kl_usb_destroy(ar_usb);
err_usb_put:
	usb_put_dev(dev);

	return ret;
}

static void ath6kl_usb_remove(struct usb_interface *interface)
{
	usb_put_dev(interface_to_usbdev(interface));
	ath6kl_usb_device_detached(interface);
}

#ifdef CONFIG_PM

static int ath6kl_usb_pm_suspend(struct usb_interface *interface,
			      pm_message_t message)
{
	struct ath6kl_usb *device;
	device = usb_get_intfdata(interface);

	ath6kl_usb_flush_all(device);
	return 0;
}

static int ath6kl_usb_pm_resume(struct usb_interface *interface)
{
	struct ath6kl_usb *device;
	device = usb_get_intfdata(interface);

	ath6kl_usb_post_recv_transfers(&device->pipes[ATH6KL_USB_PIPE_RX_DATA],
				       ATH6KL_USB_RX_BUFFER_SIZE);
	ath6kl_usb_post_recv_transfers(&device->pipes[ATH6KL_USB_PIPE_RX_DATA2],
				       ATH6KL_USB_RX_BUFFER_SIZE);

	return 0;
}

static int ath6kl_usb_pm_reset_resume(struct usb_interface *intf)
{
	if (usb_get_intfdata(intf))
		ath6kl_usb_remove(intf);
	return 0;
}

#else

#define ath6kl_usb_pm_suspend NULL
#define ath6kl_usb_pm_resume NULL
#define ath6kl_usb_pm_reset_resume NULL

#endif

/* table of devices that work with this driver */
static struct usb_device_id ath6kl_usb_ids[] = {
	{USB_DEVICE(0x0cf3, 0x9374)},
	{ /* Terminating entry */ },
};

MODULE_DEVICE_TABLE(usb, ath6kl_usb_ids);

static struct usb_driver ath6kl_usb_driver = {
	.name = "ath6kl_usb",
	.probe = ath6kl_usb_probe,
	.suspend = ath6kl_usb_pm_suspend,
	.resume = ath6kl_usb_pm_resume,
	.reset_resume = ath6kl_usb_pm_reset_resume,
	.disconnect = ath6kl_usb_remove,
	.id_table = ath6kl_usb_ids,
	.supports_autosuspend = true,
	.disable_hub_initiated_lpm = 1,
};

static int ath6kl_usb_init(void)
{
	int ret;

	ret = usb_register(&ath6kl_usb_driver);
	if (ret) {
		ath6kl_err("usb registration failed: %d\n", ret);
		return ret;
	}

	return 0;
}

static void ath6kl_usb_exit(void)
{
	usb_deregister(&ath6kl_usb_driver);
}

module_init(ath6kl_usb_init);
module_exit(ath6kl_usb_exit);

MODULE_AUTHOR("Atheros Communications, Inc.");
MODULE_DESCRIPTION("Driver support for Atheros AR600x USB devices");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_FIRMWARE(AR6004_HW_1_0_FIRMWARE_FILE);
MODULE_FIRMWARE(AR6004_HW_1_0_BOARD_DATA_FILE);
MODULE_FIRMWARE(AR6004_HW_1_0_DEFAULT_BOARD_DATA_FILE);
MODULE_FIRMWARE(AR6004_HW_1_1_FIRMWARE_FILE);
MODULE_FIRMWARE(AR6004_HW_1_1_BOARD_DATA_FILE);
MODULE_FIRMWARE(AR6004_HW_1_1_DEFAULT_BOARD_DATA_FILE);
MODULE_FIRMWARE(AR6004_HW_1_2_FIRMWARE_FILE);
MODULE_FIRMWARE(AR6004_HW_1_2_BOARD_DATA_FILE);
MODULE_FIRMWARE(AR6004_HW_1_2_DEFAULT_BOARD_DATA_FILE);
MODULE_FIRMWARE(AR6004_HW_1_3_FW_DIR "/" AR6004_HW_1_3_FIRMWARE_FILE);
MODULE_FIRMWARE(AR6004_HW_1_3_BOARD_DATA_FILE);
MODULE_FIRMWARE(AR6004_HW_1_3_DEFAULT_BOARD_DATA_FILE);