summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/libertas/if_usb.c
blob: e906616232a2f4bea102426dea77285637148046 (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
/**
  * This file contains functions used in USB interface module.
  */
#include <linux/delay.h>
#include <linux/moduleparam.h>
#include <linux/firmware.h>
#include <linux/netdevice.h>
#include <linux/slab.h>
#include <linux/usb.h>

#ifdef CONFIG_OLPC
#include <asm/olpc.h>
#endif

#define DRV_NAME "usb8xxx"

#include "host.h"
#include "decl.h"
#include "defs.h"
#include "dev.h"
#include "cmd.h"
#include "if_usb.h"

#define INSANEDEBUG	0
#define lbs_deb_usb2(...) do { if (INSANEDEBUG) lbs_deb_usbd(__VA_ARGS__); } while (0)

#define MESSAGE_HEADER_LEN	4

static char *lbs_fw_name = NULL;
module_param_named(fw_name, lbs_fw_name, charp, 0644);

MODULE_FIRMWARE("libertas/usb8388_v9.bin");
MODULE_FIRMWARE("libertas/usb8388_v5.bin");
MODULE_FIRMWARE("libertas/usb8388.bin");
MODULE_FIRMWARE("libertas/usb8682.bin");
MODULE_FIRMWARE("usb8388.bin");

enum {
	MODEL_UNKNOWN = 0x0,
	MODEL_8388 = 0x1,
	MODEL_8682 = 0x2
};

static struct usb_device_id if_usb_table[] = {
	/* Enter the device signature inside */
	{ USB_DEVICE(0x1286, 0x2001), .driver_info = MODEL_8388 },
	{ USB_DEVICE(0x05a3, 0x8388), .driver_info = MODEL_8388 },
	{}	/* Terminating entry */
};

MODULE_DEVICE_TABLE(usb, if_usb_table);

static void if_usb_receive(struct urb *urb);
static void if_usb_receive_fwload(struct urb *urb);
static int __if_usb_prog_firmware(struct if_usb_card *cardp,
					const char *fwname, int cmd);
static int if_usb_prog_firmware(struct if_usb_card *cardp,
					const char *fwname, int cmd);
static int if_usb_host_to_card(struct lbs_private *priv, uint8_t type,
			       uint8_t *payload, uint16_t nb);
static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload,
			uint16_t nb);
static void if_usb_free(struct if_usb_card *cardp);
static int if_usb_submit_rx_urb(struct if_usb_card *cardp);
static int if_usb_reset_device(struct if_usb_card *cardp);

/* sysfs hooks */

/**
 *  Set function to write firmware to device's persistent memory
 */
static ssize_t if_usb_firmware_set(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
	struct if_usb_card *cardp = priv->card;
	int ret;

	BUG_ON(buf == NULL);

	ret = if_usb_prog_firmware(cardp, buf, BOOT_CMD_UPDATE_FW);
	if (ret == 0)
		return count;

	return ret;
}

/**
 * lbs_flash_fw attribute to be exported per ethX interface through sysfs
 * (/sys/class/net/ethX/lbs_flash_fw).  Use this like so to write firmware to
 * the device's persistent memory:
 * echo usb8388-5.126.0.p5.bin > /sys/class/net/ethX/lbs_flash_fw
 */
static DEVICE_ATTR(lbs_flash_fw, 0200, NULL, if_usb_firmware_set);

/**
 *  Set function to write firmware to device's persistent memory
 */
static ssize_t if_usb_boot2_set(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
	struct if_usb_card *cardp = priv->card;
	int ret;

	BUG_ON(buf == NULL);

	ret = if_usb_prog_firmware(cardp, buf, BOOT_CMD_UPDATE_BOOT2);
	if (ret == 0)
		return count;

	return ret;
}

/**
 * lbs_flash_boot2 attribute to be exported per ethX interface through sysfs
 * (/sys/class/net/ethX/lbs_flash_boot2).  Use this like so to write firmware
 * to the device's persistent memory:
 * echo usb8388-5.126.0.p5.bin > /sys/class/net/ethX/lbs_flash_boot2
 */
static DEVICE_ATTR(lbs_flash_boot2, 0200, NULL, if_usb_boot2_set);

/**
 *  @brief  call back function to handle the status of the URB
 *  @param urb 		pointer to urb structure
 *  @return 	   	N/A
 */
static void if_usb_write_bulk_callback(struct urb *urb)
{
	struct if_usb_card *cardp = (struct if_usb_card *) urb->context;

	/* handle the transmission complete validations */

	if (urb->status == 0) {
		struct lbs_private *priv = cardp->priv;

		lbs_deb_usb2(&urb->dev->dev, "URB status is successful\n");
		lbs_deb_usb2(&urb->dev->dev, "Actual length transmitted %d\n",
			     urb->actual_length);

		/* Boot commands such as UPDATE_FW and UPDATE_BOOT2 are not
		 * passed up to the lbs level.
		 */
		if (priv && priv->dnld_sent != DNLD_BOOTCMD_SENT)
			lbs_host_to_card_done(priv);
	} else {
		/* print the failure status number for debug */
		lbs_pr_info("URB in failure status: %d\n", urb->status);
	}
}

/**
 *  @brief  free tx/rx urb, skb and rx buffer
 *  @param cardp	pointer if_usb_card
 *  @return 	   	N/A
 */
static void if_usb_free(struct if_usb_card *cardp)
{
	lbs_deb_enter(LBS_DEB_USB);

	/* Unlink tx & rx urb */
	usb_kill_urb(cardp->tx_urb);
	usb_kill_urb(cardp->rx_urb);

	usb_free_urb(cardp->tx_urb);
	cardp->tx_urb = NULL;

	usb_free_urb(cardp->rx_urb);
	cardp->rx_urb = NULL;

	kfree(cardp->ep_out_buf);
	cardp->ep_out_buf = NULL;

	lbs_deb_leave(LBS_DEB_USB);
}

static void if_usb_setup_firmware(struct lbs_private *priv)
{
	struct if_usb_card *cardp = priv->card;
	struct cmd_ds_set_boot2_ver b2_cmd;
	struct cmd_ds_802_11_fw_wake_method wake_method;

	b2_cmd.hdr.size = cpu_to_le16(sizeof(b2_cmd));
	b2_cmd.action = 0;
	b2_cmd.version = cardp->boot2_version;

	if (lbs_cmd_with_response(priv, CMD_SET_BOOT2_VER, &b2_cmd))
		lbs_deb_usb("Setting boot2 version failed\n");

	priv->wol_gpio = 2; /* Wake via GPIO2... */
	priv->wol_gap = 20; /* ... after 20ms    */
	lbs_host_sleep_cfg(priv, EHS_WAKE_ON_UNICAST_DATA,
			(struct wol_config *) NULL);

	wake_method.hdr.size = cpu_to_le16(sizeof(wake_method));
	wake_method.action = cpu_to_le16(CMD_ACT_GET);
	if (lbs_cmd_with_response(priv, CMD_802_11_FW_WAKE_METHOD, &wake_method)) {
		lbs_pr_info("Firmware does not seem to support PS mode\n");
		priv->fwcapinfo &= ~FW_CAPINFO_PS;
	} else {
		if (le16_to_cpu(wake_method.method) == CMD_WAKE_METHOD_COMMAND_INT) {
			lbs_deb_usb("Firmware seems to support PS with wake-via-command\n");
		} else {
			/* The versions which boot up this way don't seem to
			   work even if we set it to the command interrupt */
			priv->fwcapinfo &= ~FW_CAPINFO_PS;
			lbs_pr_info("Firmware doesn't wake via command interrupt; disabling PS mode\n");
		}
	}
}

static void if_usb_fw_timeo(unsigned long priv)
{
	struct if_usb_card *cardp = (void *)priv;

	if (cardp->fwdnldover) {
		lbs_deb_usb("Download complete, no event. Assuming success\n");
	} else {
		lbs_pr_err("Download timed out\n");
		cardp->surprise_removed = 1;
	}
	wake_up(&cardp->fw_wq);
}

#ifdef CONFIG_OLPC
static void if_usb_reset_olpc_card(struct lbs_private *priv)
{
	printk(KERN_CRIT "Resetting OLPC wireless via EC...\n");
	olpc_ec_cmd(0x25, NULL, 0, NULL, 0);
}
#endif

/**
 *  @brief sets the configuration values
 *  @param ifnum	interface number
 *  @param id		pointer to usb_device_id
 *  @return 	   	0 on success, error code on failure
 */
static int if_usb_probe(struct usb_interface *intf,
			const struct usb_device_id *id)
{
	struct usb_device *udev;
	struct usb_host_interface *iface_desc;
	struct usb_endpoint_descriptor *endpoint;
	struct lbs_private *priv;
	struct if_usb_card *cardp;
	int i;

	udev = interface_to_usbdev(intf);

	cardp = kzalloc(sizeof(struct if_usb_card), GFP_KERNEL);
	if (!cardp) {
		lbs_pr_err("Out of memory allocating private data.\n");
		goto error;
	}

	setup_timer(&cardp->fw_timeout, if_usb_fw_timeo, (unsigned long)cardp);
	init_waitqueue_head(&cardp->fw_wq);

	cardp->udev = udev;
	cardp->model = (uint32_t) id->driver_info;
	iface_desc = intf->cur_altsetting;

	lbs_deb_usbd(&udev->dev, "bcdUSB = 0x%X bDeviceClass = 0x%X"
		     " bDeviceSubClass = 0x%X, bDeviceProtocol = 0x%X\n",
		     le16_to_cpu(udev->descriptor.bcdUSB),
		     udev->descriptor.bDeviceClass,
		     udev->descriptor.bDeviceSubClass,
		     udev->descriptor.bDeviceProtocol);

	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
		endpoint = &iface_desc->endpoint[i].desc;
		if (usb_endpoint_is_bulk_in(endpoint)) {
			cardp->ep_in_size = le16_to_cpu(endpoint->wMaxPacketSize);
			cardp->ep_in = usb_endpoint_num(endpoint);

			lbs_deb_usbd(&udev->dev, "in_endpoint = %d\n", cardp->ep_in);
			lbs_deb_usbd(&udev->dev, "Bulk in size is %d\n", cardp->ep_in_size);

		} else if (usb_endpoint_is_bulk_out(endpoint)) {
			cardp->ep_out_size = le16_to_cpu(endpoint->wMaxPacketSize);
			cardp->ep_out = usb_endpoint_num(endpoint);

			lbs_deb_usbd(&udev->dev, "out_endpoint = %d\n", cardp->ep_out);
			lbs_deb_usbd(&udev->dev, "Bulk out size is %d\n", cardp->ep_out_size);
		}
	}
	if (!cardp->ep_out_size || !cardp->ep_in_size) {
		lbs_deb_usbd(&udev->dev, "Endpoints not found\n");
		goto dealloc;
	}
	if (!(cardp->rx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
		lbs_deb_usbd(&udev->dev, "Rx URB allocation failed\n");
		goto dealloc;
	}
	if (!(cardp->tx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
		lbs_deb_usbd(&udev->dev, "Tx URB allocation failed\n");
		goto dealloc;
	}
	cardp->ep_out_buf = kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE, GFP_KERNEL);
	if (!cardp->ep_out_buf) {
		lbs_deb_usbd(&udev->dev, "Could not allocate buffer\n");
		goto dealloc;
	}

	/* Upload firmware */
	kparam_block_sysfs_write(fw_name);
	if (__if_usb_prog_firmware(cardp, lbs_fw_name, BOOT_CMD_FW_BY_USB)) {
		kparam_unblock_sysfs_write(fw_name);
		lbs_deb_usbd(&udev->dev, "FW upload failed\n");
		goto err_prog_firmware;
	}
	kparam_unblock_sysfs_write(fw_name);

	if (!(priv = lbs_add_card(cardp, &udev->dev)))
		goto err_prog_firmware;

	cardp->priv = priv;
	cardp->priv->fw_ready = 1;

	priv->hw_host_to_card = if_usb_host_to_card;
	priv->enter_deep_sleep = NULL;
	priv->exit_deep_sleep = NULL;
	priv->reset_deep_sleep_wakeup = NULL;
#ifdef CONFIG_OLPC
	if (machine_is_olpc())
		priv->reset_card = if_usb_reset_olpc_card;
#endif

	cardp->boot2_version = udev->descriptor.bcdDevice;

	if_usb_submit_rx_urb(cardp);

	if (lbs_start_card(priv))
		goto err_start_card;

	if_usb_setup_firmware(priv);

	usb_get_dev(udev);
	usb_set_intfdata(intf, cardp);

	if (device_create_file(&priv->dev->dev, &dev_attr_lbs_flash_fw))
		lbs_pr_err("cannot register lbs_flash_fw attribute\n");

	if (device_create_file(&priv->dev->dev, &dev_attr_lbs_flash_boot2))
		lbs_pr_err("cannot register lbs_flash_boot2 attribute\n");

	return 0;

err_start_card:
	lbs_remove_card(priv);
err_prog_firmware:
	if_usb_reset_device(cardp);
dealloc:
	if_usb_free(cardp);

error:
	return -ENOMEM;
}

/**
 *  @brief free resource and cleanup
 *  @param intf		USB interface structure
 *  @return 	   	N/A
 */
static void if_usb_disconnect(struct usb_interface *intf)
{
	struct if_usb_card *cardp = usb_get_intfdata(intf);
	struct lbs_private *priv = (struct lbs_private *) cardp->priv;

	lbs_deb_enter(LBS_DEB_MAIN);

	device_remove_file(&priv->dev->dev, &dev_attr_lbs_flash_boot2);
	device_remove_file(&priv->dev->dev, &dev_attr_lbs_flash_fw);

	cardp->surprise_removed = 1;

	if (priv) {
		priv->surpriseremoved = 1;
		lbs_stop_card(priv);
		lbs_remove_card(priv);
	}

	/* Unlink and free urb */
	if_usb_free(cardp);

	usb_set_intfdata(intf, NULL);
	usb_put_dev(interface_to_usbdev(intf));

	lbs_deb_leave(LBS_DEB_MAIN);
}

/**
 *  @brief  This function download FW
 *  @param priv		pointer to struct lbs_private
 *  @return 	   	0
 */
static int if_usb_send_fw_pkt(struct if_usb_card *cardp)
{
	struct fwdata *fwdata = cardp->ep_out_buf;
	const uint8_t *firmware = cardp->fw->data;

	/* If we got a CRC failure on the last block, back
	   up and retry it */
	if (!cardp->CRC_OK) {
		cardp->totalbytes = cardp->fwlastblksent;
		cardp->fwseqnum--;
	}

	lbs_deb_usb2(&cardp->udev->dev, "totalbytes = %d\n",
		     cardp->totalbytes);

	/* struct fwdata (which we sent to the card) has an
	   extra __le32 field in between the header and the data,
	   which is not in the struct fwheader in the actual
	   firmware binary. Insert the seqnum in the middle... */
	memcpy(&fwdata->hdr, &firmware[cardp->totalbytes],
	       sizeof(struct fwheader));

	cardp->fwlastblksent = cardp->totalbytes;
	cardp->totalbytes += sizeof(struct fwheader);

	memcpy(fwdata->data, &firmware[cardp->totalbytes],
	       le32_to_cpu(fwdata->hdr.datalength));

	lbs_deb_usb2(&cardp->udev->dev, "Data length = %d\n",
		     le32_to_cpu(fwdata->hdr.datalength));

	fwdata->seqnum = cpu_to_le32(++cardp->fwseqnum);
	cardp->totalbytes += le32_to_cpu(fwdata->hdr.datalength);

	usb_tx_block(cardp, cardp->ep_out_buf, sizeof(struct fwdata) +
		     le32_to_cpu(fwdata->hdr.datalength));

	if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_DATA_TO_RECV)) {
		lbs_deb_usb2(&cardp->udev->dev, "There are data to follow\n");
		lbs_deb_usb2(&cardp->udev->dev, "seqnum = %d totalbytes = %d\n",
			     cardp->fwseqnum, cardp->totalbytes);
	} else if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK)) {
		lbs_deb_usb2(&cardp->udev->dev, "Host has finished FW downloading\n");
		lbs_deb_usb2(&cardp->udev->dev, "Donwloading FW JUMP BLOCK\n");

		cardp->fwfinalblk = 1;
	}

	lbs_deb_usb2(&cardp->udev->dev, "Firmware download done; size %d\n",
		     cardp->totalbytes);

	return 0;
}

static int if_usb_reset_device(struct if_usb_card *cardp)
{
	struct cmd_header *cmd = cardp->ep_out_buf + 4;
	int ret;

	lbs_deb_enter(LBS_DEB_USB);

	*(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);

	cmd->command = cpu_to_le16(CMD_802_11_RESET);
	cmd->size = cpu_to_le16(sizeof(cmd));
	cmd->result = cpu_to_le16(0);
	cmd->seqnum = cpu_to_le16(0x5a5a);
	usb_tx_block(cardp, cardp->ep_out_buf, 4 + sizeof(struct cmd_header));

	msleep(100);
	ret = usb_reset_device(cardp->udev);
	msleep(100);

#ifdef CONFIG_OLPC
	if (ret && machine_is_olpc())
		if_usb_reset_olpc_card(NULL);
#endif

	lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);

	return ret;
}

/**
 *  @brief This function transfer the data to the device.
 *  @param priv 	pointer to struct lbs_private
 *  @param payload	pointer to payload data
 *  @param nb		data length
 *  @return 	   	0 or -1
 */
static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload, uint16_t nb)
{
	int ret = -1;

	/* check if device is removed */
	if (cardp->surprise_removed) {
		lbs_deb_usbd(&cardp->udev->dev, "Device removed\n");
		goto tx_ret;
	}

	usb_fill_bulk_urb(cardp->tx_urb, cardp->udev,
			  usb_sndbulkpipe(cardp->udev,
					  cardp->ep_out),
			  payload, nb, if_usb_write_bulk_callback, cardp);

	cardp->tx_urb->transfer_flags |= URB_ZERO_PACKET;

	if ((ret = usb_submit_urb(cardp->tx_urb, GFP_ATOMIC))) {
		lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb failed: %d\n", ret);
		ret = -1;
	} else {
		lbs_deb_usb2(&cardp->udev->dev, "usb_submit_urb success\n");
		ret = 0;
	}

tx_ret:
	return ret;
}

static int __if_usb_submit_rx_urb(struct if_usb_card *cardp,
				  void (*callbackfn)(struct urb *urb))
{
	struct sk_buff *skb;
	int ret = -1;

	if (!(skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE))) {
		lbs_pr_err("No free skb\n");
		goto rx_ret;
	}

	cardp->rx_skb = skb;

	/* Fill the receive configuration URB and initialise the Rx call back */
	usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
			  usb_rcvbulkpipe(cardp->udev, cardp->ep_in),
			  skb->data + IPFIELD_ALIGN_OFFSET,
			  MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn,
			  cardp);

	cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;

	lbs_deb_usb2(&cardp->udev->dev, "Pointer for rx_urb %p\n", cardp->rx_urb);
	if ((ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC))) {
		lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB failed: %d\n", ret);
		kfree_skb(skb);
		cardp->rx_skb = NULL;
		ret = -1;
	} else {
		lbs_deb_usb2(&cardp->udev->dev, "Submit Rx URB success\n");
		ret = 0;
	}

rx_ret:
	return ret;
}

static int if_usb_submit_rx_urb_fwload(struct if_usb_card *cardp)
{
	return __if_usb_submit_rx_urb(cardp, &if_usb_receive_fwload);
}

static int if_usb_submit_rx_urb(struct if_usb_card *cardp)
{
	return __if_usb_submit_rx_urb(cardp, &if_usb_receive);
}

static void if_usb_receive_fwload(struct urb *urb)
{
	struct if_usb_card *cardp = urb->context;
	struct sk_buff *skb = cardp->rx_skb;
	struct fwsyncheader *syncfwheader;
	struct bootcmdresp bootcmdresp;

	if (urb->status) {
		lbs_deb_usbd(&cardp->udev->dev,
			     "URB status is failed during fw load\n");
		kfree_skb(skb);
		return;
	}

	if (cardp->fwdnldover) {
		__le32 *tmp = (__le32 *)(skb->data + IPFIELD_ALIGN_OFFSET);

		if (tmp[0] == cpu_to_le32(CMD_TYPE_INDICATION) &&
		    tmp[1] == cpu_to_le32(MACREG_INT_CODE_FIRMWARE_READY)) {
			lbs_pr_info("Firmware ready event received\n");
			wake_up(&cardp->fw_wq);
		} else {
			lbs_deb_usb("Waiting for confirmation; got %x %x\n",
				    le32_to_cpu(tmp[0]), le32_to_cpu(tmp[1]));
			if_usb_submit_rx_urb_fwload(cardp);
		}
		kfree_skb(skb);
		return;
	}
	if (cardp->bootcmdresp <= 0) {
		memcpy (&bootcmdresp, skb->data + IPFIELD_ALIGN_OFFSET,
			sizeof(bootcmdresp));

		if (le16_to_cpu(cardp->udev->descriptor.bcdDevice) < 0x3106) {
			kfree_skb(skb);
			if_usb_submit_rx_urb_fwload(cardp);
			cardp->bootcmdresp = BOOT_CMD_RESP_OK;
			lbs_deb_usbd(&cardp->udev->dev,
				     "Received valid boot command response\n");
			return;
		}
		if (bootcmdresp.magic != cpu_to_le32(BOOT_CMD_MAGIC_NUMBER)) {
			if (bootcmdresp.magic == cpu_to_le32(CMD_TYPE_REQUEST) ||
			    bootcmdresp.magic == cpu_to_le32(CMD_TYPE_DATA) ||
			    bootcmdresp.magic == cpu_to_le32(CMD_TYPE_INDICATION)) {
				if (!cardp->bootcmdresp)
					lbs_pr_info("Firmware already seems alive; resetting\n");
				cardp->bootcmdresp = -1;
			} else {
				lbs_pr_info("boot cmd response wrong magic number (0x%x)\n",
					    le32_to_cpu(bootcmdresp.magic));
			}
		} else if ((bootcmdresp.cmd != BOOT_CMD_FW_BY_USB) &&
			   (bootcmdresp.cmd != BOOT_CMD_UPDATE_FW) &&
			   (bootcmdresp.cmd != BOOT_CMD_UPDATE_BOOT2)) {
			lbs_pr_info("boot cmd response cmd_tag error (%d)\n",
				    bootcmdresp.cmd);
		} else if (bootcmdresp.result != BOOT_CMD_RESP_OK) {
			lbs_pr_info("boot cmd response result error (%d)\n",
				    bootcmdresp.result);
		} else {
			cardp->bootcmdresp = 1;
			lbs_deb_usbd(&cardp->udev->dev,
				     "Received valid boot command response\n");
		}
		kfree_skb(skb);
		if_usb_submit_rx_urb_fwload(cardp);
		return;
	}

	syncfwheader = kmemdup(skb->data + IPFIELD_ALIGN_OFFSET,
			       sizeof(struct fwsyncheader), GFP_ATOMIC);
	if (!syncfwheader) {
		lbs_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
		kfree_skb(skb);
		return;
	}

	if (!syncfwheader->cmd) {
		lbs_deb_usb2(&cardp->udev->dev, "FW received Blk with correct CRC\n");
		lbs_deb_usb2(&cardp->udev->dev, "FW received Blk seqnum = %d\n",
			     le32_to_cpu(syncfwheader->seqnum));
		cardp->CRC_OK = 1;
	} else {
		lbs_deb_usbd(&cardp->udev->dev, "FW received Blk with CRC error\n");
		cardp->CRC_OK = 0;
	}

	kfree_skb(skb);

	/* Give device 5s to either write firmware to its RAM or eeprom */
	mod_timer(&cardp->fw_timeout, jiffies + (HZ*5));

	if (cardp->fwfinalblk) {
		cardp->fwdnldover = 1;
		goto exit;
	}

	if_usb_send_fw_pkt(cardp);

 exit:
	if_usb_submit_rx_urb_fwload(cardp);

	kfree(syncfwheader);
}

#define MRVDRV_MIN_PKT_LEN	30

static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
				       struct if_usb_card *cardp,
				       struct lbs_private *priv)
{
	if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + MESSAGE_HEADER_LEN
	    || recvlength < MRVDRV_MIN_PKT_LEN) {
		lbs_deb_usbd(&cardp->udev->dev, "Packet length is Invalid\n");
		kfree_skb(skb);
		return;
	}

	skb_reserve(skb, IPFIELD_ALIGN_OFFSET);
	skb_put(skb, recvlength);
	skb_pull(skb, MESSAGE_HEADER_LEN);

	lbs_process_rxed_packet(priv, skb);
}

static inline void process_cmdrequest(int recvlength, uint8_t *recvbuff,
				      struct sk_buff *skb,
				      struct if_usb_card *cardp,
				      struct lbs_private *priv)
{
	u8 i;

	if (recvlength > LBS_CMD_BUFFER_SIZE) {
		lbs_deb_usbd(&cardp->udev->dev,
			     "The receive buffer is too large\n");
		kfree_skb(skb);
		return;
	}

	BUG_ON(!in_interrupt());

	spin_lock(&priv->driver_lock);

	i = (priv->resp_idx == 0) ? 1 : 0;
	BUG_ON(priv->resp_len[i]);
	priv->resp_len[i] = (recvlength - MESSAGE_HEADER_LEN);
	memcpy(priv->resp_buf[i], recvbuff + MESSAGE_HEADER_LEN,
		priv->resp_len[i]);
	kfree_skb(skb);
	lbs_notify_command_response(priv, i);

	spin_unlock(&priv->driver_lock);

	lbs_deb_usbd(&cardp->udev->dev,
		    "Wake up main thread to handle cmd response\n");
}

/**
 *  @brief This function reads of the packet into the upload buff,
 *  wake up the main thread and initialise the Rx callack.
 *
 *  @param urb		pointer to struct urb
 *  @return 	   	N/A
 */
static void if_usb_receive(struct urb *urb)
{
	struct if_usb_card *cardp = urb->context;
	struct sk_buff *skb = cardp->rx_skb;
	struct lbs_private *priv = cardp->priv;
	int recvlength = urb->actual_length;
	uint8_t *recvbuff = NULL;
	uint32_t recvtype = 0;
	__le32 *pkt = (__le32 *)(skb->data + IPFIELD_ALIGN_OFFSET);
	uint32_t event;

	lbs_deb_enter(LBS_DEB_USB);

	if (recvlength) {
		if (urb->status) {
			lbs_deb_usbd(&cardp->udev->dev, "RX URB failed: %d\n",
				     urb->status);
			kfree_skb(skb);
			goto setup_for_next;
		}

		recvbuff = skb->data + IPFIELD_ALIGN_OFFSET;
		recvtype = le32_to_cpu(pkt[0]);
		lbs_deb_usbd(&cardp->udev->dev,
			    "Recv length = 0x%x, Recv type = 0x%X\n",
			    recvlength, recvtype);
	} else if (urb->status) {
		kfree_skb(skb);
		goto rx_exit;
	}

	switch (recvtype) {
	case CMD_TYPE_DATA:
		process_cmdtypedata(recvlength, skb, cardp, priv);
		break;

	case CMD_TYPE_REQUEST:
		process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
		break;

	case CMD_TYPE_INDICATION:
		/* Event handling */
		event = le32_to_cpu(pkt[1]);
		lbs_deb_usbd(&cardp->udev->dev, "**EVENT** 0x%X\n", event);
		kfree_skb(skb);

		/* Icky undocumented magic special case */
		if (event & 0xffff0000) {
			u32 trycount = (event & 0xffff0000) >> 16;

			lbs_send_tx_feedback(priv, trycount);
		} else
			lbs_queue_event(priv, event & 0xFF);
		break;

	default:
		lbs_deb_usbd(&cardp->udev->dev, "Unknown command type 0x%X\n",
			     recvtype);
		kfree_skb(skb);
		break;
	}

setup_for_next:
	if_usb_submit_rx_urb(cardp);
rx_exit:
	lbs_deb_leave(LBS_DEB_USB);
}

/**
 *  @brief This function downloads data to FW
 *  @param priv		pointer to struct lbs_private structure
 *  @param type		type of data
 *  @param buf		pointer to data buffer
 *  @param len		number of bytes
 *  @return 	   	0 or -1
 */
static int if_usb_host_to_card(struct lbs_private *priv, uint8_t type,
			       uint8_t *payload, uint16_t nb)
{
	struct if_usb_card *cardp = priv->card;

	lbs_deb_usbd(&cardp->udev->dev,"*** type = %u\n", type);
	lbs_deb_usbd(&cardp->udev->dev,"size after = %d\n", nb);

	if (type == MVMS_CMD) {
		*(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
		priv->dnld_sent = DNLD_CMD_SENT;
	} else {
		*(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_DATA);
		priv->dnld_sent = DNLD_DATA_SENT;
	}

	memcpy((cardp->ep_out_buf + MESSAGE_HEADER_LEN), payload, nb);

	return usb_tx_block(cardp, cardp->ep_out_buf, nb + MESSAGE_HEADER_LEN);
}

/**
 *  @brief This function issues Boot command to the Boot2 code
 *  @param ivalue   1:Boot from FW by USB-Download
 *                  2:Boot from FW in EEPROM
 *  @return 	   	0
 */
static int if_usb_issue_boot_command(struct if_usb_card *cardp, int ivalue)
{
	struct bootcmd *bootcmd = cardp->ep_out_buf;

	/* Prepare command */
	bootcmd->magic = cpu_to_le32(BOOT_CMD_MAGIC_NUMBER);
	bootcmd->cmd = ivalue;
	memset(bootcmd->pad, 0, sizeof(bootcmd->pad));

	/* Issue command */
	usb_tx_block(cardp, cardp->ep_out_buf, sizeof(*bootcmd));

	return 0;
}


/**
 *  @brief This function checks the validity of Boot2/FW image.
 *
 *  @param data              pointer to image
 *         len               image length
 *  @return     0 or -1
 */
static int check_fwfile_format(const uint8_t *data, uint32_t totlen)
{
	uint32_t bincmd, exit;
	uint32_t blksize, offset, len;
	int ret;

	ret = 1;
	exit = len = 0;

	do {
		struct fwheader *fwh = (void *)data;

		bincmd = le32_to_cpu(fwh->dnldcmd);
		blksize = le32_to_cpu(fwh->datalength);
		switch (bincmd) {
		case FW_HAS_DATA_TO_RECV:
			offset = sizeof(struct fwheader) + blksize;
			data += offset;
			len += offset;
			if (len >= totlen)
				exit = 1;
			break;
		case FW_HAS_LAST_BLOCK:
			exit = 1;
			ret = 0;
			break;
		default:
			exit = 1;
			break;
		}
	} while (!exit);

	if (ret)
		lbs_pr_err("firmware file format check FAIL\n");
	else
		lbs_deb_fw("firmware file format check PASS\n");

	return ret;
}


/**
*  @brief This function programs the firmware subject to cmd
*
*  @param cardp             the if_usb_card descriptor
*         fwname            firmware or boot2 image file name
*         cmd               either BOOT_CMD_FW_BY_USB, BOOT_CMD_UPDATE_FW,
*                           or BOOT_CMD_UPDATE_BOOT2.
*  @return     0 or error code
*/
static int if_usb_prog_firmware(struct if_usb_card *cardp,
				const char *fwname, int cmd)
{
	struct lbs_private *priv = cardp->priv;
	unsigned long flags, caps;
	int ret;

	caps = priv->fwcapinfo;
	if (((cmd == BOOT_CMD_UPDATE_FW) && !(caps & FW_CAPINFO_FIRMWARE_UPGRADE)) ||
	    ((cmd == BOOT_CMD_UPDATE_BOOT2) && !(caps & FW_CAPINFO_BOOT2_UPGRADE)))
		return -EOPNOTSUPP;

	/* Ensure main thread is idle. */
	spin_lock_irqsave(&priv->driver_lock, flags);
	while (priv->cur_cmd != NULL || priv->dnld_sent != DNLD_RES_RECEIVED) {
		spin_unlock_irqrestore(&priv->driver_lock, flags);
		if (wait_event_interruptible(priv->waitq,
				(priv->cur_cmd == NULL &&
				priv->dnld_sent == DNLD_RES_RECEIVED))) {
			return -ERESTARTSYS;
		}
		spin_lock_irqsave(&priv->driver_lock, flags);
	}
	priv->dnld_sent = DNLD_BOOTCMD_SENT;
	spin_unlock_irqrestore(&priv->driver_lock, flags);

	ret = __if_usb_prog_firmware(cardp, fwname, cmd);

	spin_lock_irqsave(&priv->driver_lock, flags);
	priv->dnld_sent = DNLD_RES_RECEIVED;
	spin_unlock_irqrestore(&priv->driver_lock, flags);

	wake_up_interruptible(&priv->waitq);

	return ret;
}

/* table of firmware file names */
static const struct {
	u32 model;
	const char *fwname;
} fw_table[] = {
	{ MODEL_8388, "libertas/usb8388_v9.bin" },
	{ MODEL_8388, "libertas/usb8388_v5.bin" },
	{ MODEL_8388, "libertas/usb8388.bin" },
	{ MODEL_8388, "usb8388.bin" },
	{ MODEL_8682, "libertas/usb8682.bin" }
};

static int get_fw(struct if_usb_card *cardp, const char *fwname)
{
	int i;

	/* Try user-specified firmware first */
	if (fwname)
		return request_firmware(&cardp->fw, fwname, &cardp->udev->dev);

	/* Otherwise search for firmware to use */
	for (i = 0; i < ARRAY_SIZE(fw_table); i++) {
		if (fw_table[i].model != cardp->model)
			continue;
		if (request_firmware(&cardp->fw, fw_table[i].fwname,
					&cardp->udev->dev) == 0)
			return 0;
	}

	return -ENOENT;
}

static int __if_usb_prog_firmware(struct if_usb_card *cardp,
					const char *fwname, int cmd)
{
	int i = 0;
	static int reset_count = 10;
	int ret = 0;

	lbs_deb_enter(LBS_DEB_USB);

	ret = get_fw(cardp, fwname);
	if (ret) {
		lbs_pr_err("failed to find firmware (%d)\n", ret);
		goto done;
	}

	if (check_fwfile_format(cardp->fw->data, cardp->fw->size)) {
		ret = -EINVAL;
		goto release_fw;
	}

	/* Cancel any pending usb business */
	usb_kill_urb(cardp->rx_urb);
	usb_kill_urb(cardp->tx_urb);

	cardp->fwlastblksent = 0;
	cardp->fwdnldover = 0;
	cardp->totalbytes = 0;
	cardp->fwfinalblk = 0;
	cardp->bootcmdresp = 0;

restart:
	if (if_usb_submit_rx_urb_fwload(cardp) < 0) {
		lbs_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");
		ret = -EIO;
		goto release_fw;
	}

	cardp->bootcmdresp = 0;
	do {
		int j = 0;
		i++;
		if_usb_issue_boot_command(cardp, cmd);
		/* wait for command response */
		do {
			j++;
			msleep_interruptible(100);
		} while (cardp->bootcmdresp == 0 && j < 10);
	} while (cardp->bootcmdresp == 0 && i < 5);

	if (cardp->bootcmdresp == BOOT_CMD_RESP_NOT_SUPPORTED) {
		/* Return to normal operation */
		ret = -EOPNOTSUPP;
		usb_kill_urb(cardp->rx_urb);
		usb_kill_urb(cardp->tx_urb);
		if (if_usb_submit_rx_urb(cardp) < 0)
			ret = -EIO;
		goto release_fw;
	} else if (cardp->bootcmdresp <= 0) {
		if (--reset_count >= 0) {
			if_usb_reset_device(cardp);
			goto restart;
		}
		ret = -EIO;
		goto release_fw;
	}

	i = 0;

	cardp->totalbytes = 0;
	cardp->fwlastblksent = 0;
	cardp->CRC_OK = 1;
	cardp->fwdnldover = 0;
	cardp->fwseqnum = -1;
	cardp->totalbytes = 0;
	cardp->fwfinalblk = 0;

	/* Send the first firmware packet... */
	if_usb_send_fw_pkt(cardp);

	/* ... and wait for the process to complete */
	wait_event_interruptible(cardp->fw_wq, cardp->surprise_removed || cardp->fwdnldover);

	del_timer_sync(&cardp->fw_timeout);
	usb_kill_urb(cardp->rx_urb);

	if (!cardp->fwdnldover) {
		lbs_pr_info("failed to load fw, resetting device!\n");
		if (--reset_count >= 0) {
			if_usb_reset_device(cardp);
			goto restart;
		}

		lbs_pr_info("FW download failure, time = %d ms\n", i * 100);
		ret = -EIO;
		goto release_fw;
	}

 release_fw:
	release_firmware(cardp->fw);
	cardp->fw = NULL;

 done:
	lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
	return ret;
}


#ifdef CONFIG_PM
static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
{
	struct if_usb_card *cardp = usb_get_intfdata(intf);
	struct lbs_private *priv = cardp->priv;
	int ret;

	lbs_deb_enter(LBS_DEB_USB);

	if (priv->psstate != PS_STATE_FULL_POWER)
		return -1;

	if (priv->wol_criteria == EHS_REMOVE_WAKEUP) {
		lbs_pr_info("Suspend attempt without "
						"configuring wake params!\n");
		return -ENOSYS;
	}

	ret = lbs_suspend(priv);
	if (ret)
		goto out;

	/* Unlink tx & rx urb */
	usb_kill_urb(cardp->tx_urb);
	usb_kill_urb(cardp->rx_urb);

 out:
	lbs_deb_leave(LBS_DEB_USB);
	return ret;
}

static int if_usb_resume(struct usb_interface *intf)
{
	struct if_usb_card *cardp = usb_get_intfdata(intf);
	struct lbs_private *priv = cardp->priv;

	lbs_deb_enter(LBS_DEB_USB);

	if_usb_submit_rx_urb(cardp);

	lbs_resume(priv);

	lbs_deb_leave(LBS_DEB_USB);
	return 0;
}
#else
#define if_usb_suspend NULL
#define if_usb_resume NULL
#endif

static struct usb_driver if_usb_driver = {
	.name = DRV_NAME,
	.probe = if_usb_probe,
	.disconnect = if_usb_disconnect,
	.id_table = if_usb_table,
	.suspend = if_usb_suspend,
	.resume = if_usb_resume,
	.reset_resume = if_usb_resume,
};

static int __init if_usb_init_module(void)
{
	int ret = 0;

	lbs_deb_enter(LBS_DEB_MAIN);

	ret = usb_register(&if_usb_driver);

	lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
	return ret;
}

static void __exit if_usb_exit_module(void)
{
	lbs_deb_enter(LBS_DEB_MAIN);

	usb_deregister(&if_usb_driver);

	lbs_deb_leave(LBS_DEB_MAIN);
}

module_init(if_usb_init_module);
module_exit(if_usb_exit_module);

MODULE_DESCRIPTION("8388 USB WLAN Driver");
MODULE_AUTHOR("Marvell International Ltd. and Red Hat, Inc.");
MODULE_LICENSE("GPL");