summaryrefslogtreecommitdiffstats
path: root/drivers/bluetooth/bfusb.c
blob: e8d2a340356deec78f56917f330d92f5ab96c3ec (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
/*
 *
 *  AVM BlueFRITZ! USB driver
 *
 *  Copyright (C) 2003  Marcel Holtmann <marcel@holtmann.org>
 *
 *
 *  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.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

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

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/skbuff.h>

#include <linux/device.h>
#include <linux/firmware.h>

#include <linux/usb.h>

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>

#ifndef CONFIG_BT_HCIBFUSB_DEBUG
#undef  BT_DBG
#define BT_DBG(D...)
#endif

#define VERSION "1.1"

static int ignore = 0;

static struct usb_driver bfusb_driver;

static struct usb_device_id bfusb_table[] = {
	/* AVM BlueFRITZ! USB */
	{ USB_DEVICE(0x057c, 0x2200) },

	{ }	/* Terminating entry */
};

MODULE_DEVICE_TABLE(usb, bfusb_table);


#define BFUSB_MAX_BLOCK_SIZE	256

#define BFUSB_BLOCK_TIMEOUT	3000

#define BFUSB_TX_PROCESS	1
#define BFUSB_TX_WAKEUP		2

#define BFUSB_MAX_BULK_TX	2
#define BFUSB_MAX_BULK_RX	2

struct bfusb {
	struct hci_dev		*hdev;

	unsigned long		state;

	struct usb_device	*udev;

	unsigned int		bulk_in_ep;
	unsigned int		bulk_out_ep;
	unsigned int		bulk_pkt_size;

	rwlock_t		lock;

	struct sk_buff_head	transmit_q;

	struct sk_buff		*reassembly;

	atomic_t		pending_tx;
	struct sk_buff_head	pending_q;
	struct sk_buff_head	completed_q;
};

struct bfusb_scb {
	struct urb *urb;
};

static void bfusb_tx_complete(struct urb *urb, struct pt_regs *regs);
static void bfusb_rx_complete(struct urb *urb, struct pt_regs *regs);

static struct urb *bfusb_get_completed(struct bfusb *bfusb)
{
	struct sk_buff *skb;
	struct urb *urb = NULL;

	BT_DBG("bfusb %p", bfusb);

	skb = skb_dequeue(&bfusb->completed_q);
	if (skb) {
		urb = ((struct bfusb_scb *) skb->cb)->urb;
		kfree_skb(skb);
	}

	return urb;
}

static void bfusb_unlink_urbs(struct bfusb *bfusb)
{
	struct sk_buff *skb;
	struct urb *urb;

	BT_DBG("bfusb %p", bfusb);

	while ((skb = skb_dequeue(&bfusb->pending_q))) {
		urb = ((struct bfusb_scb *) skb->cb)->urb;
		usb_kill_urb(urb);
		skb_queue_tail(&bfusb->completed_q, skb);
	}

	while ((urb = bfusb_get_completed(bfusb)))
		usb_free_urb(urb);
}


static int bfusb_send_bulk(struct bfusb *bfusb, struct sk_buff *skb)
{
	struct bfusb_scb *scb = (void *) skb->cb;
	struct urb *urb = bfusb_get_completed(bfusb);
	int err, pipe;

	BT_DBG("bfusb %p skb %p len %d", bfusb, skb, skb->len);

	if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
		return -ENOMEM;

	pipe = usb_sndbulkpipe(bfusb->udev, bfusb->bulk_out_ep);

	usb_fill_bulk_urb(urb, bfusb->udev, pipe, skb->data, skb->len,
			bfusb_tx_complete, skb);

	scb->urb = urb;

	skb_queue_tail(&bfusb->pending_q, skb);

	err = usb_submit_urb(urb, GFP_ATOMIC);
	if (err) {
		BT_ERR("%s bulk tx submit failed urb %p err %d", 
					bfusb->hdev->name, urb, err);
		skb_unlink(skb, &bfusb->pending_q);
		usb_free_urb(urb);
	} else
		atomic_inc(&bfusb->pending_tx);

	return err;
}

static void bfusb_tx_wakeup(struct bfusb *bfusb)
{
	struct sk_buff *skb;

	BT_DBG("bfusb %p", bfusb);

	if (test_and_set_bit(BFUSB_TX_PROCESS, &bfusb->state)) {
		set_bit(BFUSB_TX_WAKEUP, &bfusb->state);
		return;
	}

	do {
		clear_bit(BFUSB_TX_WAKEUP, &bfusb->state);

		while ((atomic_read(&bfusb->pending_tx) < BFUSB_MAX_BULK_TX) &&
				(skb = skb_dequeue(&bfusb->transmit_q))) {
			if (bfusb_send_bulk(bfusb, skb) < 0) {
				skb_queue_head(&bfusb->transmit_q, skb);
				break;
			}
		}

	} while (test_bit(BFUSB_TX_WAKEUP, &bfusb->state));

	clear_bit(BFUSB_TX_PROCESS, &bfusb->state);
}

static void bfusb_tx_complete(struct urb *urb, struct pt_regs *regs)
{
	struct sk_buff *skb = (struct sk_buff *) urb->context;
	struct bfusb *bfusb = (struct bfusb *) skb->dev;

	BT_DBG("bfusb %p urb %p skb %p len %d", bfusb, urb, skb, skb->len);

	atomic_dec(&bfusb->pending_tx);

	if (!test_bit(HCI_RUNNING, &bfusb->hdev->flags))
		return;

	if (!urb->status)
		bfusb->hdev->stat.byte_tx += skb->len;
	else
		bfusb->hdev->stat.err_tx++;

	read_lock(&bfusb->lock);

	skb_unlink(skb, &bfusb->pending_q);
	skb_queue_tail(&bfusb->completed_q, skb);

	bfusb_tx_wakeup(bfusb);

	read_unlock(&bfusb->lock);
}


static int bfusb_rx_submit(struct bfusb *bfusb, struct urb *urb)
{
	struct bfusb_scb *scb;
	struct sk_buff *skb;
	int err, pipe, size = HCI_MAX_FRAME_SIZE + 32;

	BT_DBG("bfusb %p urb %p", bfusb, urb);

	if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
		return -ENOMEM;

	if (!(skb = bt_skb_alloc(size, GFP_ATOMIC))) {
		usb_free_urb(urb);
		return -ENOMEM;
	}

	skb->dev = (void *) bfusb;

	scb = (struct bfusb_scb *) skb->cb;
	scb->urb = urb;

	pipe = usb_rcvbulkpipe(bfusb->udev, bfusb->bulk_in_ep);

	usb_fill_bulk_urb(urb, bfusb->udev, pipe, skb->data, size,
			bfusb_rx_complete, skb);

	skb_queue_tail(&bfusb->pending_q, skb);

	err = usb_submit_urb(urb, GFP_ATOMIC);
	if (err) {
		BT_ERR("%s bulk rx submit failed urb %p err %d",
					bfusb->hdev->name, urb, err);
		skb_unlink(skb, &bfusb->pending_q);
		kfree_skb(skb);
		usb_free_urb(urb);
	}

	return err;
}

static inline int bfusb_recv_block(struct bfusb *bfusb, int hdr, unsigned char *data, int len)
{
	BT_DBG("bfusb %p hdr 0x%02x data %p len %d", bfusb, hdr, data, len);

	if (hdr & 0x10) {
		BT_ERR("%s error in block", bfusb->hdev->name);
		if (bfusb->reassembly)
			kfree_skb(bfusb->reassembly);
		bfusb->reassembly = NULL;
		return -EIO;
	}

	if (hdr & 0x04) {
		struct sk_buff *skb;
		unsigned char pkt_type;
		int pkt_len = 0;

		if (bfusb->reassembly) {
			BT_ERR("%s unexpected start block", bfusb->hdev->name);
			kfree_skb(bfusb->reassembly);
			bfusb->reassembly = NULL;
		}

		if (len < 1) {
			BT_ERR("%s no packet type found", bfusb->hdev->name);
			return -EPROTO;
		}

		pkt_type = *data++; len--;

		switch (pkt_type) {
		case HCI_EVENT_PKT:
			if (len >= HCI_EVENT_HDR_SIZE) {
				struct hci_event_hdr *hdr = (struct hci_event_hdr *) data;
				pkt_len = HCI_EVENT_HDR_SIZE + hdr->plen;
			} else {
				BT_ERR("%s event block is too short", bfusb->hdev->name);
				return -EILSEQ;
			}
			break;

		case HCI_ACLDATA_PKT:
			if (len >= HCI_ACL_HDR_SIZE) {
				struct hci_acl_hdr *hdr = (struct hci_acl_hdr *) data;
				pkt_len = HCI_ACL_HDR_SIZE + __le16_to_cpu(hdr->dlen);
			} else {
				BT_ERR("%s data block is too short", bfusb->hdev->name);
				return -EILSEQ;
			}
			break;

		case HCI_SCODATA_PKT:
			if (len >= HCI_SCO_HDR_SIZE) {
				struct hci_sco_hdr *hdr = (struct hci_sco_hdr *) data;
				pkt_len = HCI_SCO_HDR_SIZE + hdr->dlen;
			} else {
				BT_ERR("%s audio block is too short", bfusb->hdev->name);
				return -EILSEQ;
			}
			break;
		}

		skb = bt_skb_alloc(pkt_len, GFP_ATOMIC);
		if (!skb) {
			BT_ERR("%s no memory for the packet", bfusb->hdev->name);
			return -ENOMEM;
		}

		skb->dev = (void *) bfusb->hdev;
		skb->pkt_type = pkt_type;

		bfusb->reassembly = skb;
	} else {
		if (!bfusb->reassembly) {
			BT_ERR("%s unexpected continuation block", bfusb->hdev->name);
			return -EIO;
		}
	}

	if (len > 0)
		memcpy(skb_put(bfusb->reassembly, len), data, len);

	if (hdr & 0x08) {
		hci_recv_frame(bfusb->reassembly);
		bfusb->reassembly = NULL;
	}

	return 0;
}

static void bfusb_rx_complete(struct urb *urb, struct pt_regs *regs)
{
	struct sk_buff *skb = (struct sk_buff *) urb->context;
	struct bfusb *bfusb = (struct bfusb *) skb->dev;
	unsigned char *buf = urb->transfer_buffer;
	int count = urb->actual_length;
	int err, hdr, len;

	BT_DBG("bfusb %p urb %p skb %p len %d", bfusb, urb, skb, skb->len);

	read_lock(&bfusb->lock);

	if (!test_bit(HCI_RUNNING, &bfusb->hdev->flags))
		goto unlock;

	if (urb->status || !count)
		goto resubmit;

	bfusb->hdev->stat.byte_rx += count;

	skb_put(skb, count);

	while (count) {
		hdr = buf[0] | (buf[1] << 8);

		if (hdr & 0x4000) {
			len = 0;
			count -= 2;
			buf   += 2;
		} else {
			len = (buf[2] == 0) ? 256 : buf[2];
			count -= 3;
			buf   += 3;
		}

		if (count < len) {
			BT_ERR("%s block extends over URB buffer ranges",
					bfusb->hdev->name);
		}

		if ((hdr & 0xe1) == 0xc1)
			bfusb_recv_block(bfusb, hdr, buf, len);

		count -= len;
		buf   += len;
	}

	skb_unlink(skb, &bfusb->pending_q);
	kfree_skb(skb);

	bfusb_rx_submit(bfusb, urb);

	read_unlock(&bfusb->lock);

	return;

resubmit:
	urb->dev = bfusb->udev;

	err = usb_submit_urb(urb, GFP_ATOMIC);
	if (err) {
		BT_ERR("%s bulk resubmit failed urb %p err %d",
					bfusb->hdev->name, urb, err);
	}

unlock:
	read_unlock(&bfusb->lock);
}


static int bfusb_open(struct hci_dev *hdev)
{
	struct bfusb *bfusb = (struct bfusb *) hdev->driver_data;
	unsigned long flags;
	int i, err;

	BT_DBG("hdev %p bfusb %p", hdev, bfusb);

	if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
		return 0;

	write_lock_irqsave(&bfusb->lock, flags);

	err = bfusb_rx_submit(bfusb, NULL);
	if (!err) {
		for (i = 1; i < BFUSB_MAX_BULK_RX; i++)
			bfusb_rx_submit(bfusb, NULL);
	} else {
		clear_bit(HCI_RUNNING, &hdev->flags);
	}

	write_unlock_irqrestore(&bfusb->lock, flags);

	return err;
}

static int bfusb_flush(struct hci_dev *hdev)
{
	struct bfusb *bfusb = (struct bfusb *) hdev->driver_data;

	BT_DBG("hdev %p bfusb %p", hdev, bfusb);

	skb_queue_purge(&bfusb->transmit_q);

	return 0;
}

static int bfusb_close(struct hci_dev *hdev)
{
	struct bfusb *bfusb = (struct bfusb *) hdev->driver_data;
	unsigned long flags;

	BT_DBG("hdev %p bfusb %p", hdev, bfusb);

	if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
		return 0;

	write_lock_irqsave(&bfusb->lock, flags);
	write_unlock_irqrestore(&bfusb->lock, flags);

	bfusb_unlink_urbs(bfusb);
	bfusb_flush(hdev);

	return 0;
}

static int bfusb_send_frame(struct sk_buff *skb)
{
	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
	struct bfusb *bfusb;
	struct sk_buff *nskb;
	unsigned char buf[3];
	int sent = 0, size, count;

	BT_DBG("hdev %p skb %p type %d len %d", hdev, skb, skb->pkt_type, skb->len);

	if (!hdev) {
		BT_ERR("Frame for unknown HCI device (hdev=NULL)");
		return -ENODEV;
	}

	if (!test_bit(HCI_RUNNING, &hdev->flags))
		return -EBUSY;

	bfusb = (struct bfusb *) hdev->driver_data;

	switch (skb->pkt_type) {
	case HCI_COMMAND_PKT:
		hdev->stat.cmd_tx++;
		break;
	case HCI_ACLDATA_PKT:
		hdev->stat.acl_tx++;
		break;
	case HCI_SCODATA_PKT:
		hdev->stat.sco_tx++;
		break;
	};

	/* Prepend skb with frame type */
	memcpy(skb_push(skb, 1), &(skb->pkt_type), 1);

	count = skb->len;

	/* Max HCI frame size seems to be 1511 + 1 */
	if (!(nskb = bt_skb_alloc(count + 32, GFP_ATOMIC))) {
		BT_ERR("Can't allocate memory for new packet");
		return -ENOMEM;
	}

	nskb->dev = (void *) bfusb;

	while (count) {
		size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE);

		buf[0] = 0xc1 | ((sent == 0) ? 0x04 : 0) | ((count == size) ? 0x08 : 0);
		buf[1] = 0x00;
		buf[2] = (size == BFUSB_MAX_BLOCK_SIZE) ? 0 : size;

		memcpy(skb_put(nskb, 3), buf, 3);
		memcpy(skb_put(nskb, size), skb->data + sent, size);

		sent  += size;
		count -= size;
	}

	/* Don't send frame with multiple size of bulk max packet */
	if ((nskb->len % bfusb->bulk_pkt_size) == 0) {
		buf[0] = 0xdd;
		buf[1] = 0x00;
		memcpy(skb_put(nskb, 2), buf, 2);
	}

	read_lock(&bfusb->lock);

	skb_queue_tail(&bfusb->transmit_q, nskb);
	bfusb_tx_wakeup(bfusb);

	read_unlock(&bfusb->lock);

	kfree_skb(skb);

	return 0;
}

static void bfusb_destruct(struct hci_dev *hdev)
{
	struct bfusb *bfusb = (struct bfusb *) hdev->driver_data;

	BT_DBG("hdev %p bfusb %p", hdev, bfusb);

	kfree(bfusb);
}

static int bfusb_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
{
	return -ENOIOCTLCMD;
}


static int bfusb_load_firmware(struct bfusb *bfusb, unsigned char *firmware, int count)
{
	unsigned char *buf;
	int err, pipe, len, size, sent = 0;

	BT_DBG("bfusb %p udev %p", bfusb, bfusb->udev);

	BT_INFO("BlueFRITZ! USB loading firmware");

	pipe = usb_sndctrlpipe(bfusb->udev, 0);

	if (usb_control_msg(bfusb->udev, pipe, USB_REQ_SET_CONFIGURATION,
				0, 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT) < 0) {
		BT_ERR("Can't change to loading configuration");
		return -EBUSY;
	}

	bfusb->udev->toggle[0] = bfusb->udev->toggle[1] = 0;

	buf = kmalloc(BFUSB_MAX_BLOCK_SIZE + 3, GFP_ATOMIC);
	if (!buf) {
		BT_ERR("Can't allocate memory chunk for firmware");
		return -ENOMEM;
	}

	pipe = usb_sndbulkpipe(bfusb->udev, bfusb->bulk_out_ep);

	while (count) {
		size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE + 3);

		memcpy(buf, firmware + sent, size);

		err = usb_bulk_msg(bfusb->udev, pipe, buf, size,
					&len, BFUSB_BLOCK_TIMEOUT);

		if (err || (len != size)) {
			BT_ERR("Error in firmware loading");
			goto error;
		}

		sent  += size;
		count -= size;
	}

	if ((err = usb_bulk_msg(bfusb->udev, pipe, NULL, 0,
				&len, BFUSB_BLOCK_TIMEOUT)) < 0) {
		BT_ERR("Error in null packet request");
		goto error;
	}

	pipe = usb_sndctrlpipe(bfusb->udev, 0);

        if ((err = usb_control_msg(bfusb->udev, pipe, USB_REQ_SET_CONFIGURATION,
				0, 2, 0, NULL, 0, USB_CTRL_SET_TIMEOUT)) < 0) {
		BT_ERR("Can't change to running configuration");
		goto error;
	}

	bfusb->udev->toggle[0] = bfusb->udev->toggle[1] = 0;

	BT_INFO("BlueFRITZ! USB device ready");

	kfree(buf);
	return 0;

error:
	kfree(buf);

	pipe = usb_sndctrlpipe(bfusb->udev, 0);

	usb_control_msg(bfusb->udev, pipe, USB_REQ_SET_CONFIGURATION,
				0, 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);

	return err;
}

static int bfusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
	const struct firmware *firmware;
	struct usb_device *udev = interface_to_usbdev(intf);
	struct usb_host_endpoint *bulk_out_ep;
	struct usb_host_endpoint *bulk_in_ep;
	struct hci_dev *hdev;
	struct bfusb *bfusb;

	BT_DBG("intf %p id %p", intf, id);

	if (ignore)
		return -ENODEV;

	/* Check number of endpoints */
	if (intf->cur_altsetting->desc.bNumEndpoints < 2)
		return -EIO;

	bulk_out_ep = &intf->cur_altsetting->endpoint[0];
	bulk_in_ep  = &intf->cur_altsetting->endpoint[1];

	if (!bulk_out_ep || !bulk_in_ep) {
		BT_ERR("Bulk endpoints not found");
		goto done;
	}

	/* Initialize control structure and load firmware */
	if (!(bfusb = kmalloc(sizeof(struct bfusb), GFP_KERNEL))) {
		BT_ERR("Can't allocate memory for control structure");
		goto done;
	}

	memset(bfusb, 0, sizeof(struct bfusb));

	bfusb->udev = udev;
	bfusb->bulk_in_ep    = bulk_in_ep->desc.bEndpointAddress;
	bfusb->bulk_out_ep   = bulk_out_ep->desc.bEndpointAddress;
	bfusb->bulk_pkt_size = le16_to_cpu(bulk_out_ep->desc.wMaxPacketSize);

	rwlock_init(&bfusb->lock);

	bfusb->reassembly = NULL;

	skb_queue_head_init(&bfusb->transmit_q);
	skb_queue_head_init(&bfusb->pending_q);
	skb_queue_head_init(&bfusb->completed_q);

	if (request_firmware(&firmware, "bfubase.frm", &udev->dev) < 0) {
		BT_ERR("Firmware request failed");
		goto error;
	}

	BT_DBG("firmware data %p size %d", firmware->data, firmware->size);

	if (bfusb_load_firmware(bfusb, firmware->data, firmware->size) < 0) {
		BT_ERR("Firmware loading failed");
		goto release;
	}

	release_firmware(firmware);

	/* Initialize and register HCI device */
	hdev = hci_alloc_dev();
	if (!hdev) {
		BT_ERR("Can't allocate HCI device");
		goto error;
	}

	bfusb->hdev = hdev;

	hdev->type = HCI_USB;
	hdev->driver_data = bfusb;
	SET_HCIDEV_DEV(hdev, &intf->dev);

	hdev->open     = bfusb_open;
	hdev->close    = bfusb_close;
	hdev->flush    = bfusb_flush;
	hdev->send     = bfusb_send_frame;
	hdev->destruct = bfusb_destruct;
	hdev->ioctl    = bfusb_ioctl;

	hdev->owner = THIS_MODULE;

	if (hci_register_dev(hdev) < 0) {
		BT_ERR("Can't register HCI device");
		hci_free_dev(hdev);
		goto error;
	}

	usb_set_intfdata(intf, bfusb);

	return 0;

release:
	release_firmware(firmware);

error:
	kfree(bfusb);

done:
	return -EIO;
}

static void bfusb_disconnect(struct usb_interface *intf)
{
	struct bfusb *bfusb = usb_get_intfdata(intf);
	struct hci_dev *hdev = bfusb->hdev;

	BT_DBG("intf %p", intf);

	if (!hdev)
		return;

	usb_set_intfdata(intf, NULL);

	bfusb_close(hdev);

	if (hci_unregister_dev(hdev) < 0)
		BT_ERR("Can't unregister HCI device %s", hdev->name);

	hci_free_dev(hdev);
}

static struct usb_driver bfusb_driver = {
	.owner		= THIS_MODULE,
	.name		= "bfusb",
	.probe		= bfusb_probe,
	.disconnect	= bfusb_disconnect,
	.id_table	= bfusb_table,
};

static int __init bfusb_init(void)
{
	int err;

	BT_INFO("BlueFRITZ! USB driver ver %s", VERSION);

	if ((err = usb_register(&bfusb_driver)) < 0)
		BT_ERR("Failed to register BlueFRITZ! USB driver");

	return err;
}

static void __exit bfusb_exit(void)
{
	usb_deregister(&bfusb_driver);
}

module_init(bfusb_init);
module_exit(bfusb_exit);

module_param(ignore, bool, 0644);
MODULE_PARM_DESC(ignore, "Ignore devices from the matching table");

MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
MODULE_DESCRIPTION("BlueFRITZ! USB driver ver " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL");
OpenPOWER on IntegriCloud