summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/marvell/libertas_tf/if_usb.c
blob: e0ade40d9497d7c81156220f394177cdb5c2be62 (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
/*
 *  Copyright (C) 2008, cozybit Inc.
 *  Copyright (C) 2003-2006, Marvell International Ltd.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or (at
 *  your option) any later version.
 */
#define DRV_NAME "lbtf_usb"

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include "libertas_tf.h"
#include "if_usb.h"

#include <linux/delay.h>
#include <linux/module.h>
#include <linux/firmware.h>
#include <linux/netdevice.h>
#include <linux/slab.h>
#include <linux/usb.h>

#define INSANEDEBUG	0
#define lbtf_deb_usb2(...) do { if (INSANEDEBUG) lbtf_deb_usbd(__VA_ARGS__); } while (0)

#define MESSAGE_HEADER_LEN	4

static char *lbtf_fw_name = "lbtf_usb.bin";
module_param_named(fw_name, lbtf_fw_name, charp, 0644);

MODULE_FIRMWARE("lbtf_usb.bin");

static struct usb_device_id if_usb_table[] = {
	/* Enter the device signature inside */
	{ USB_DEVICE(0x1286, 0x2001) },
	{ USB_DEVICE(0x05a3, 0x8388) },
	{}	/* 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);
static int if_usb_host_to_card(struct lbtf_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, u8 data);
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);

/**
 *  if_usb_wrike_bulk_callback -  call back to handle URB status
 *
 *  @param urb		pointer to urb structure
 */
static void if_usb_write_bulk_callback(struct urb *urb)
{
	if (urb->status != 0) {
		/* print the failure status number for debug */
		pr_info("URB in failure status: %d\n", urb->status);
	} else {
		lbtf_deb_usb2(&urb->dev->dev, "URB status is successful\n");
		lbtf_deb_usb2(&urb->dev->dev, "Actual length transmitted %d\n",
			     urb->actual_length);
	}
}

/**
 *  if_usb_free - free tx/rx urb, skb and rx buffer
 *
 *  @param cardp	pointer if_usb_card
 */
static void if_usb_free(struct if_usb_card *cardp)
{
	lbtf_deb_enter(LBTF_DEB_USB);

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

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

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

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

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

	lbtf_deb_leave(LBTF_DEB_USB);
}

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

	lbtf_deb_enter(LBTF_DEB_USB);

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

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

	lbtf_deb_leave(LBTF_DEB_USB);
}

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

	lbtf_deb_enter(LBTF_DEB_USB);
	if (!cardp->fwdnldover) {
		/* Download timed out */
		cardp->priv->surpriseremoved = 1;
		pr_err("Download timed out\n");
	} else {
		lbtf_deb_usb("Download complete, no event. Assuming success\n");
	}
	wake_up(&cardp->fw_wq);
	lbtf_deb_leave(LBTF_DEB_USB);
}

/**
 *  if_usb_probe - sets the configuration values
 *
 *  @ifnum	interface number
 *  @id		pointer to usb_device_id
 *
 *  Returns: 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 lbtf_private *priv;
	struct if_usb_card *cardp;
	int i;

	lbtf_deb_enter(LBTF_DEB_USB);
	udev = interface_to_usbdev(intf);

	cardp = kzalloc(sizeof(struct if_usb_card), GFP_KERNEL);
	if (!cardp)
		goto error;

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

	cardp->udev = udev;
	iface_desc = intf->cur_altsetting;

	lbtf_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);

			lbtf_deb_usbd(&udev->dev, "in_endpoint = %d\n",
				cardp->ep_in);
			lbtf_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);

			lbtf_deb_usbd(&udev->dev, "out_endpoint = %d\n",
				cardp->ep_out);
			lbtf_deb_usbd(&udev->dev, "Bulk out size is %d\n",
				cardp->ep_out_size);
		}
	}
	if (!cardp->ep_out_size || !cardp->ep_in_size) {
		lbtf_deb_usbd(&udev->dev, "Endpoints not found\n");
		/* Endpoints not found */
		goto dealloc;
	}

	cardp->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!cardp->rx_urb)
		goto dealloc;

	cardp->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!cardp->tx_urb)
		goto dealloc;

	cardp->cmd_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!cardp->cmd_urb)
		goto dealloc;

	cardp->ep_out_buf = kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
				    GFP_KERNEL);
	if (!cardp->ep_out_buf) {
		lbtf_deb_usbd(&udev->dev, "Could not allocate buffer\n");
		goto dealloc;
	}

	priv = lbtf_add_card(cardp, &udev->dev);
	if (!priv)
		goto dealloc;

	cardp->priv = priv;

	priv->hw_host_to_card = if_usb_host_to_card;
	priv->hw_prog_firmware = if_usb_prog_firmware;
	priv->hw_reset_device = if_usb_reset_device;
	cardp->boot2_version = udev->descriptor.bcdDevice;

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

	return 0;

dealloc:
	if_usb_free(cardp);
error:
lbtf_deb_leave(LBTF_DEB_MAIN);
	return -ENOMEM;
}

/**
 *  if_usb_disconnect -  free resource and cleanup
 *
 *  @intf	USB interface structure
 */
static void if_usb_disconnect(struct usb_interface *intf)
{
	struct if_usb_card *cardp = usb_get_intfdata(intf);
	struct lbtf_private *priv = cardp->priv;

	lbtf_deb_enter(LBTF_DEB_MAIN);

	if_usb_reset_device(cardp);

	if (priv)
		lbtf_remove_card(priv);

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

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

	lbtf_deb_leave(LBTF_DEB_MAIN);
}

/**
 *  if_usb_send_fw_pkt -  This function downloads the FW
 *
 *  @priv	pointer to struct lbtf_private
 *
 *  Returns: 0
 */
static int if_usb_send_fw_pkt(struct if_usb_card *cardp)
{
	struct fwdata *fwdata = cardp->ep_out_buf;
	u8 *firmware = (u8 *) cardp->fw->data;

	lbtf_deb_enter(LBTF_DEB_FW);

	/* 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--;
	}

	lbtf_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));

	lbtf_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), 0);

	if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_DATA_TO_RECV)) {
		lbtf_deb_usb2(&cardp->udev->dev, "There are data to follow\n");
		lbtf_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)) {
		lbtf_deb_usb2(&cardp->udev->dev,
			"Host has finished FW downloading\n");
		lbtf_deb_usb2(&cardp->udev->dev, "Donwloading FW JUMP BLOCK\n");

		/* Host has finished FW downloading
		 * Donwloading FW JUMP BLOCK
		 */
		cardp->fwfinalblk = 1;
	}

	lbtf_deb_usb2(&cardp->udev->dev, "Firmware download done; size %d\n",
		     cardp->totalbytes);

	lbtf_deb_leave(LBTF_DEB_FW);
	return 0;
}

static int if_usb_reset_device(struct if_usb_card *cardp)
{
	struct cmd_ds_802_11_reset *cmd = cardp->ep_out_buf + 4;
	int ret;

	lbtf_deb_enter(LBTF_DEB_USB);

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

	cmd->hdr.command = cpu_to_le16(CMD_802_11_RESET);
	cmd->hdr.size = cpu_to_le16(sizeof(struct cmd_ds_802_11_reset));
	cmd->hdr.result = cpu_to_le16(0);
	cmd->hdr.seqnum = cpu_to_le16(0x5a5a);
	cmd->action = cpu_to_le16(CMD_ACT_HALT);
	usb_tx_block(cardp, cardp->ep_out_buf,
		     4 + sizeof(struct cmd_ds_802_11_reset), 0);

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

	lbtf_deb_leave_args(LBTF_DEB_USB, "ret %d", ret);

	return ret;
}

/**
 *  usb_tx_block - transfer data to the device
 *
 *  @priv	pointer to struct lbtf_private
 *  @payload	pointer to payload data
 *  @nb		data length
 *  @data	non-zero for data, zero for commands
 *
 *  Returns: 0 on success, nonzero otherwise.
 */
static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload,
			uint16_t nb, u8 data)
{
	int ret = -1;
	struct urb *urb;

	lbtf_deb_enter(LBTF_DEB_USB);
	/* check if device is removed */
	if (cardp->priv->surpriseremoved) {
		lbtf_deb_usbd(&cardp->udev->dev, "Device removed\n");
		goto tx_ret;
	}

	if (data)
		urb = cardp->tx_urb;
	else
		urb = cardp->cmd_urb;

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

	urb->transfer_flags |= URB_ZERO_PACKET;

	if (usb_submit_urb(urb, GFP_ATOMIC)) {
		lbtf_deb_usbd(&cardp->udev->dev,
			"usb_submit_urb failed: %d\n", ret);
		goto tx_ret;
	}

	lbtf_deb_usb2(&cardp->udev->dev, "usb_submit_urb success\n");

	ret = 0;

tx_ret:
	lbtf_deb_leave(LBTF_DEB_USB);
	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;

	lbtf_deb_enter(LBTF_DEB_USB);

	skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
	if (!skb) {
		pr_err("No free skb\n");
		lbtf_deb_leave(LBTF_DEB_USB);
		return -1;
	}

	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_tail_pointer(skb),
			  MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn, cardp);

	cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;

	lbtf_deb_usb2(&cardp->udev->dev, "Pointer for rx_urb %p\n",
		cardp->rx_urb);
	ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC);
	if (ret) {
		lbtf_deb_usbd(&cardp->udev->dev,
			"Submit Rx URB failed: %d\n", ret);
		kfree_skb(skb);
		cardp->rx_skb = NULL;
		lbtf_deb_leave(LBTF_DEB_USB);
		return -1;
	} else {
		lbtf_deb_usb2(&cardp->udev->dev, "Submit Rx URB success\n");
		lbtf_deb_leave(LBTF_DEB_USB);
		return 0;
	}
}

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 bcmdresp;

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

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

		if (tmp[0] == cpu_to_le32(CMD_TYPE_INDICATION) &&
		    tmp[1] == cpu_to_le32(MACREG_INT_CODE_FIRMWARE_READY)) {
			/* Firmware ready event received */
			pr_info("Firmware ready event received\n");
			wake_up(&cardp->fw_wq);
		} else {
			lbtf_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);
		lbtf_deb_leave(LBTF_DEB_USB);
		return;
	}
	if (cardp->bootcmdresp <= 0) {
		memcpy(&bcmdresp, skb->data, sizeof(bcmdresp));

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

		kfree_skb(skb);
		if_usb_submit_rx_urb_fwload(cardp);
		lbtf_deb_leave(LBTF_DEB_USB);
		return;
	}

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

	if (!syncfwheader->cmd) {
		lbtf_deb_usb2(&cardp->udev->dev,
			"FW received Blk with correct CRC\n");
		lbtf_deb_usb2(&cardp->udev->dev,
			"FW received Blk seqnum = %d\n",
			le32_to_cpu(syncfwheader->seqnum));
		cardp->CRC_OK = 1;
	} else {
		lbtf_deb_usbd(&cardp->udev->dev,
			"FW received Blk with CRC error\n");
		cardp->CRC_OK = 0;
	}

	kfree_skb(skb);

	/* reschedule timer for 200ms hence */
	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);

	lbtf_deb_leave(LBTF_DEB_USB);
}

#define MRVDRV_MIN_PKT_LEN	30

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

	skb_put(skb, recvlength);
	skb_pull(skb, MESSAGE_HEADER_LEN);
	lbtf_rx(priv, skb);
}

static inline void process_cmdrequest(int recvlength, uint8_t *recvbuff,
				      struct sk_buff *skb,
				      struct if_usb_card *cardp,
				      struct lbtf_private *priv)
{
	if (recvlength > LBS_CMD_BUFFER_SIZE) {
		lbtf_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);
	memcpy(priv->cmd_resp_buff, recvbuff + MESSAGE_HEADER_LEN,
	       recvlength - MESSAGE_HEADER_LEN);
	kfree_skb(skb);
	lbtf_cmd_response_rx(priv);
	spin_unlock(&priv->driver_lock);
}

/**
 *  if_usb_receive - read data received from the device.
 *
 *  @urb		pointer to struct urb
 */
static void if_usb_receive(struct urb *urb)
{
	struct if_usb_card *cardp = urb->context;
	struct sk_buff *skb = cardp->rx_skb;
	struct lbtf_private *priv = cardp->priv;
	int recvlength = urb->actual_length;
	uint8_t *recvbuff = NULL;
	uint32_t recvtype = 0;
	__le32 *pkt = (__le32 *) skb->data;

	lbtf_deb_enter(LBTF_DEB_USB);

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

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

	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 cause handling */
		u32 event_cause = le32_to_cpu(pkt[1]);
		lbtf_deb_usbd(&cardp->udev->dev, "**EVENT** 0x%X\n",
			event_cause);

		/* Icky undocumented magic special case */
		if (event_cause & 0xffff0000) {
			u16 tmp;
			u8 retrycnt;
			u8 failure;

			tmp = event_cause >> 16;
			retrycnt = tmp & 0x00ff;
			failure = (tmp & 0xff00) >> 8;
			lbtf_send_tx_feedback(priv, retrycnt, failure);
		} else if (event_cause == LBTF_EVENT_BCN_SENT)
			lbtf_bcn_sent(priv);
		else
			lbtf_deb_usbd(&cardp->udev->dev,
			       "Unsupported notification %d received\n",
			       event_cause);
		kfree_skb(skb);
		break;
	}
	default:
		lbtf_deb_usbd(&cardp->udev->dev,
			"libertastf: unknown command type 0x%X\n", recvtype);
		kfree_skb(skb);
		break;
	}

setup_for_next:
	if_usb_submit_rx_urb(cardp);
	lbtf_deb_leave(LBTF_DEB_USB);
}

/**
 *  if_usb_host_to_card -  Download data to the device
 *
 *  @priv		pointer to struct lbtf_private structure
 *  @type		type of data
 *  @buf		pointer to data buffer
 *  @len		number of bytes
 *
 *  Returns: 0 on success, nonzero otherwise
 */
static int if_usb_host_to_card(struct lbtf_private *priv, uint8_t type,
			       uint8_t *payload, uint16_t nb)
{
	struct if_usb_card *cardp = priv->card;
	u8 data = 0;

	lbtf_deb_usbd(&cardp->udev->dev, "*** type = %u\n", type);
	lbtf_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);
	} else {
		*(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_DATA);
		data = 1;
	}

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

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

/**
 *  if_usb_issue_boot_command - Issue boot command to Boot2.
 *
 *  @ivalue   1 boots from FW by USB-Download, 2 boots from FW in EEPROM.
 *
 *  Returns: 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), 0);

	return 0;
}


/**
 *  check_fwfile_format - Check the validity of Boot2/FW image.
 *
 *  @data	pointer to image
 *  @totlen	image length
 *
 *  Returns: 0 if the image is valid, nonzero otherwise.
 */
static int check_fwfile_format(const u8 *data, u32 totlen)
{
	u32 bincmd, exit;
	u32 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)
		pr_err("firmware file format check FAIL\n");
	else
		lbtf_deb_fw("firmware file format check PASS\n");

	return ret;
}


static int if_usb_prog_firmware(struct if_usb_card *cardp)
{
	int i = 0;
	static int reset_count = 10;
	int ret = 0;

	lbtf_deb_enter(LBTF_DEB_USB);

	kernel_param_lock(THIS_MODULE);
	ret = request_firmware(&cardp->fw, lbtf_fw_name, &cardp->udev->dev);
	if (ret < 0) {
		pr_err("request_firmware() failed with %#x\n", ret);
		pr_err("firmware %s not found\n", lbtf_fw_name);
		kernel_param_unlock(THIS_MODULE);
		goto done;
	}
	kernel_param_unlock(THIS_MODULE);

	if (check_fwfile_format(cardp->fw->data, cardp->fw->size))
		goto release_fw;

restart:
	if (if_usb_submit_rx_urb_fwload(cardp) < 0) {
		lbtf_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");
		ret = -1;
		goto release_fw;
	}

	cardp->bootcmdresp = 0;
	do {
		int j = 0;
		i++;
		/* Issue Boot command = 1, Boot from Download-FW */
		if_usb_issue_boot_command(cardp, BOOT_CMD_FW_BY_USB);
		/* wait for command response */
		do {
			j++;
			msleep_interruptible(100);
		} while (cardp->bootcmdresp == 0 && j < 10);
	} while (cardp->bootcmdresp == 0 && i < 5);

	if (cardp->bootcmdresp <= 0) {
		if (--reset_count >= 0) {
			if_usb_reset_device(cardp);
			goto restart;
		}
		return -1;
	}

	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->priv->surpriseremoved ||
					       cardp->fwdnldover);

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

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

		pr_info("FW download failure, time = %d ms\n", i * 100);
		ret = -1;
		goto release_fw;
	}

	cardp->priv->fw_ready = 1;

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

	if_usb_setup_firmware(cardp->priv);

 done:
	lbtf_deb_leave_args(LBTF_DEB_USB, "ret %d", ret);
	return ret;
}


#define if_usb_suspend NULL
#define if_usb_resume NULL

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,
	.disable_hub_initiated_lpm = 1,
};

module_usb_driver(if_usb_driver);

MODULE_DESCRIPTION("8388 USB WLAN Thinfirm Driver");
MODULE_AUTHOR("Cozybit Inc.");
MODULE_LICENSE("GPL");