xref: /openbmc/linux/drivers/bluetooth/bfusb.c (revision 4800cd83)
1 /*
2  *
3  *  AVM BlueFRITZ! USB driver
4  *
5  *  Copyright (C) 2003-2006  Marcel Holtmann <marcel@holtmann.org>
6  *
7  *
8  *  This program is free software; you can redistribute it and/or modify
9  *  it under the terms of the GNU General Public License as published by
10  *  the Free Software Foundation; either version 2 of the License, or
11  *  (at your option) any later version.
12  *
13  *  This program is distributed in the hope that it will be useful,
14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  *  GNU General Public License for more details.
17  *
18  *  You should have received a copy of the GNU General Public License
19  *  along with this program; if not, write to the Free Software
20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
21  *
22  */
23 
24 #include <linux/module.h>
25 
26 #include <linux/kernel.h>
27 #include <linux/init.h>
28 #include <linux/slab.h>
29 #include <linux/types.h>
30 #include <linux/errno.h>
31 #include <linux/skbuff.h>
32 
33 #include <linux/device.h>
34 #include <linux/firmware.h>
35 
36 #include <linux/usb.h>
37 
38 #include <net/bluetooth/bluetooth.h>
39 #include <net/bluetooth/hci_core.h>
40 
41 #define VERSION "1.2"
42 
43 static struct usb_driver bfusb_driver;
44 
45 static struct usb_device_id bfusb_table[] = {
46 	/* AVM BlueFRITZ! USB */
47 	{ USB_DEVICE(0x057c, 0x2200) },
48 
49 	{ }	/* Terminating entry */
50 };
51 
52 MODULE_DEVICE_TABLE(usb, bfusb_table);
53 
54 #define BFUSB_MAX_BLOCK_SIZE	256
55 
56 #define BFUSB_BLOCK_TIMEOUT	3000
57 
58 #define BFUSB_TX_PROCESS	1
59 #define BFUSB_TX_WAKEUP		2
60 
61 #define BFUSB_MAX_BULK_TX	2
62 #define BFUSB_MAX_BULK_RX	2
63 
64 struct bfusb_data {
65 	struct hci_dev		*hdev;
66 
67 	unsigned long		state;
68 
69 	struct usb_device	*udev;
70 
71 	unsigned int		bulk_in_ep;
72 	unsigned int		bulk_out_ep;
73 	unsigned int		bulk_pkt_size;
74 
75 	rwlock_t		lock;
76 
77 	struct sk_buff_head	transmit_q;
78 
79 	struct sk_buff		*reassembly;
80 
81 	atomic_t		pending_tx;
82 	struct sk_buff_head	pending_q;
83 	struct sk_buff_head	completed_q;
84 };
85 
86 struct bfusb_data_scb {
87 	struct urb *urb;
88 };
89 
90 static void bfusb_tx_complete(struct urb *urb);
91 static void bfusb_rx_complete(struct urb *urb);
92 
93 static struct urb *bfusb_get_completed(struct bfusb_data *data)
94 {
95 	struct sk_buff *skb;
96 	struct urb *urb = NULL;
97 
98 	BT_DBG("bfusb %p", data);
99 
100 	skb = skb_dequeue(&data->completed_q);
101 	if (skb) {
102 		urb = ((struct bfusb_data_scb *) skb->cb)->urb;
103 		kfree_skb(skb);
104 	}
105 
106 	return urb;
107 }
108 
109 static void bfusb_unlink_urbs(struct bfusb_data *data)
110 {
111 	struct sk_buff *skb;
112 	struct urb *urb;
113 
114 	BT_DBG("bfusb %p", data);
115 
116 	while ((skb = skb_dequeue(&data->pending_q))) {
117 		urb = ((struct bfusb_data_scb *) skb->cb)->urb;
118 		usb_kill_urb(urb);
119 		skb_queue_tail(&data->completed_q, skb);
120 	}
121 
122 	while ((urb = bfusb_get_completed(data)))
123 		usb_free_urb(urb);
124 }
125 
126 static int bfusb_send_bulk(struct bfusb_data *data, struct sk_buff *skb)
127 {
128 	struct bfusb_data_scb *scb = (void *) skb->cb;
129 	struct urb *urb = bfusb_get_completed(data);
130 	int err, pipe;
131 
132 	BT_DBG("bfusb %p skb %p len %d", data, skb, skb->len);
133 
134 	if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
135 		return -ENOMEM;
136 
137 	pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
138 
139 	usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, skb->len,
140 			bfusb_tx_complete, skb);
141 
142 	scb->urb = urb;
143 
144 	skb_queue_tail(&data->pending_q, skb);
145 
146 	err = usb_submit_urb(urb, GFP_ATOMIC);
147 	if (err) {
148 		BT_ERR("%s bulk tx submit failed urb %p err %d",
149 					data->hdev->name, urb, err);
150 		skb_unlink(skb, &data->pending_q);
151 		usb_free_urb(urb);
152 	} else
153 		atomic_inc(&data->pending_tx);
154 
155 	return err;
156 }
157 
158 static void bfusb_tx_wakeup(struct bfusb_data *data)
159 {
160 	struct sk_buff *skb;
161 
162 	BT_DBG("bfusb %p", data);
163 
164 	if (test_and_set_bit(BFUSB_TX_PROCESS, &data->state)) {
165 		set_bit(BFUSB_TX_WAKEUP, &data->state);
166 		return;
167 	}
168 
169 	do {
170 		clear_bit(BFUSB_TX_WAKEUP, &data->state);
171 
172 		while ((atomic_read(&data->pending_tx) < BFUSB_MAX_BULK_TX) &&
173 				(skb = skb_dequeue(&data->transmit_q))) {
174 			if (bfusb_send_bulk(data, skb) < 0) {
175 				skb_queue_head(&data->transmit_q, skb);
176 				break;
177 			}
178 		}
179 
180 	} while (test_bit(BFUSB_TX_WAKEUP, &data->state));
181 
182 	clear_bit(BFUSB_TX_PROCESS, &data->state);
183 }
184 
185 static void bfusb_tx_complete(struct urb *urb)
186 {
187 	struct sk_buff *skb = (struct sk_buff *) urb->context;
188 	struct bfusb_data *data = (struct bfusb_data *) skb->dev;
189 
190 	BT_DBG("bfusb %p urb %p skb %p len %d", data, urb, skb, skb->len);
191 
192 	atomic_dec(&data->pending_tx);
193 
194 	if (!test_bit(HCI_RUNNING, &data->hdev->flags))
195 		return;
196 
197 	if (!urb->status)
198 		data->hdev->stat.byte_tx += skb->len;
199 	else
200 		data->hdev->stat.err_tx++;
201 
202 	read_lock(&data->lock);
203 
204 	skb_unlink(skb, &data->pending_q);
205 	skb_queue_tail(&data->completed_q, skb);
206 
207 	bfusb_tx_wakeup(data);
208 
209 	read_unlock(&data->lock);
210 }
211 
212 
213 static int bfusb_rx_submit(struct bfusb_data *data, struct urb *urb)
214 {
215 	struct bfusb_data_scb *scb;
216 	struct sk_buff *skb;
217 	int err, pipe, size = HCI_MAX_FRAME_SIZE + 32;
218 
219 	BT_DBG("bfusb %p urb %p", data, urb);
220 
221 	if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
222 		return -ENOMEM;
223 
224 	skb = bt_skb_alloc(size, GFP_ATOMIC);
225 	if (!skb) {
226 		usb_free_urb(urb);
227 		return -ENOMEM;
228 	}
229 
230 	skb->dev = (void *) data;
231 
232 	scb = (struct bfusb_data_scb *) skb->cb;
233 	scb->urb = urb;
234 
235 	pipe = usb_rcvbulkpipe(data->udev, data->bulk_in_ep);
236 
237 	usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, size,
238 			bfusb_rx_complete, skb);
239 
240 	skb_queue_tail(&data->pending_q, skb);
241 
242 	err = usb_submit_urb(urb, GFP_ATOMIC);
243 	if (err) {
244 		BT_ERR("%s bulk rx submit failed urb %p err %d",
245 					data->hdev->name, urb, err);
246 		skb_unlink(skb, &data->pending_q);
247 		kfree_skb(skb);
248 		usb_free_urb(urb);
249 	}
250 
251 	return err;
252 }
253 
254 static inline int bfusb_recv_block(struct bfusb_data *data, int hdr, unsigned char *buf, int len)
255 {
256 	BT_DBG("bfusb %p hdr 0x%02x data %p len %d", data, hdr, buf, len);
257 
258 	if (hdr & 0x10) {
259 		BT_ERR("%s error in block", data->hdev->name);
260 		kfree_skb(data->reassembly);
261 		data->reassembly = NULL;
262 		return -EIO;
263 	}
264 
265 	if (hdr & 0x04) {
266 		struct sk_buff *skb;
267 		unsigned char pkt_type;
268 		int pkt_len = 0;
269 
270 		if (data->reassembly) {
271 			BT_ERR("%s unexpected start block", data->hdev->name);
272 			kfree_skb(data->reassembly);
273 			data->reassembly = NULL;
274 		}
275 
276 		if (len < 1) {
277 			BT_ERR("%s no packet type found", data->hdev->name);
278 			return -EPROTO;
279 		}
280 
281 		pkt_type = *buf++; len--;
282 
283 		switch (pkt_type) {
284 		case HCI_EVENT_PKT:
285 			if (len >= HCI_EVENT_HDR_SIZE) {
286 				struct hci_event_hdr *hdr = (struct hci_event_hdr *) buf;
287 				pkt_len = HCI_EVENT_HDR_SIZE + hdr->plen;
288 			} else {
289 				BT_ERR("%s event block is too short", data->hdev->name);
290 				return -EILSEQ;
291 			}
292 			break;
293 
294 		case HCI_ACLDATA_PKT:
295 			if (len >= HCI_ACL_HDR_SIZE) {
296 				struct hci_acl_hdr *hdr = (struct hci_acl_hdr *) buf;
297 				pkt_len = HCI_ACL_HDR_SIZE + __le16_to_cpu(hdr->dlen);
298 			} else {
299 				BT_ERR("%s data block is too short", data->hdev->name);
300 				return -EILSEQ;
301 			}
302 			break;
303 
304 		case HCI_SCODATA_PKT:
305 			if (len >= HCI_SCO_HDR_SIZE) {
306 				struct hci_sco_hdr *hdr = (struct hci_sco_hdr *) buf;
307 				pkt_len = HCI_SCO_HDR_SIZE + hdr->dlen;
308 			} else {
309 				BT_ERR("%s audio block is too short", data->hdev->name);
310 				return -EILSEQ;
311 			}
312 			break;
313 		}
314 
315 		skb = bt_skb_alloc(pkt_len, GFP_ATOMIC);
316 		if (!skb) {
317 			BT_ERR("%s no memory for the packet", data->hdev->name);
318 			return -ENOMEM;
319 		}
320 
321 		skb->dev = (void *) data->hdev;
322 		bt_cb(skb)->pkt_type = pkt_type;
323 
324 		data->reassembly = skb;
325 	} else {
326 		if (!data->reassembly) {
327 			BT_ERR("%s unexpected continuation block", data->hdev->name);
328 			return -EIO;
329 		}
330 	}
331 
332 	if (len > 0)
333 		memcpy(skb_put(data->reassembly, len), buf, len);
334 
335 	if (hdr & 0x08) {
336 		hci_recv_frame(data->reassembly);
337 		data->reassembly = NULL;
338 	}
339 
340 	return 0;
341 }
342 
343 static void bfusb_rx_complete(struct urb *urb)
344 {
345 	struct sk_buff *skb = (struct sk_buff *) urb->context;
346 	struct bfusb_data *data = (struct bfusb_data *) skb->dev;
347 	unsigned char *buf = urb->transfer_buffer;
348 	int count = urb->actual_length;
349 	int err, hdr, len;
350 
351 	BT_DBG("bfusb %p urb %p skb %p len %d", data, urb, skb, skb->len);
352 
353 	read_lock(&data->lock);
354 
355 	if (!test_bit(HCI_RUNNING, &data->hdev->flags))
356 		goto unlock;
357 
358 	if (urb->status || !count)
359 		goto resubmit;
360 
361 	data->hdev->stat.byte_rx += count;
362 
363 	skb_put(skb, count);
364 
365 	while (count) {
366 		hdr = buf[0] | (buf[1] << 8);
367 
368 		if (hdr & 0x4000) {
369 			len = 0;
370 			count -= 2;
371 			buf   += 2;
372 		} else {
373 			len = (buf[2] == 0) ? 256 : buf[2];
374 			count -= 3;
375 			buf   += 3;
376 		}
377 
378 		if (count < len) {
379 			BT_ERR("%s block extends over URB buffer ranges",
380 					data->hdev->name);
381 		}
382 
383 		if ((hdr & 0xe1) == 0xc1)
384 			bfusb_recv_block(data, hdr, buf, len);
385 
386 		count -= len;
387 		buf   += len;
388 	}
389 
390 	skb_unlink(skb, &data->pending_q);
391 	kfree_skb(skb);
392 
393 	bfusb_rx_submit(data, urb);
394 
395 	read_unlock(&data->lock);
396 
397 	return;
398 
399 resubmit:
400 	urb->dev = data->udev;
401 
402 	err = usb_submit_urb(urb, GFP_ATOMIC);
403 	if (err) {
404 		BT_ERR("%s bulk resubmit failed urb %p err %d",
405 					data->hdev->name, urb, err);
406 	}
407 
408 unlock:
409 	read_unlock(&data->lock);
410 }
411 
412 static int bfusb_open(struct hci_dev *hdev)
413 {
414 	struct bfusb_data *data = hdev->driver_data;
415 	unsigned long flags;
416 	int i, err;
417 
418 	BT_DBG("hdev %p bfusb %p", hdev, data);
419 
420 	if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
421 		return 0;
422 
423 	write_lock_irqsave(&data->lock, flags);
424 
425 	err = bfusb_rx_submit(data, NULL);
426 	if (!err) {
427 		for (i = 1; i < BFUSB_MAX_BULK_RX; i++)
428 			bfusb_rx_submit(data, NULL);
429 	} else {
430 		clear_bit(HCI_RUNNING, &hdev->flags);
431 	}
432 
433 	write_unlock_irqrestore(&data->lock, flags);
434 
435 	return err;
436 }
437 
438 static int bfusb_flush(struct hci_dev *hdev)
439 {
440 	struct bfusb_data *data = hdev->driver_data;
441 
442 	BT_DBG("hdev %p bfusb %p", hdev, data);
443 
444 	skb_queue_purge(&data->transmit_q);
445 
446 	return 0;
447 }
448 
449 static int bfusb_close(struct hci_dev *hdev)
450 {
451 	struct bfusb_data *data = hdev->driver_data;
452 	unsigned long flags;
453 
454 	BT_DBG("hdev %p bfusb %p", hdev, data);
455 
456 	if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
457 		return 0;
458 
459 	write_lock_irqsave(&data->lock, flags);
460 	write_unlock_irqrestore(&data->lock, flags);
461 
462 	bfusb_unlink_urbs(data);
463 	bfusb_flush(hdev);
464 
465 	return 0;
466 }
467 
468 static int bfusb_send_frame(struct sk_buff *skb)
469 {
470 	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
471 	struct bfusb_data *data;
472 	struct sk_buff *nskb;
473 	unsigned char buf[3];
474 	int sent = 0, size, count;
475 
476 	BT_DBG("hdev %p skb %p type %d len %d", hdev, skb, bt_cb(skb)->pkt_type, skb->len);
477 
478 	if (!hdev) {
479 		BT_ERR("Frame for unknown HCI device (hdev=NULL)");
480 		return -ENODEV;
481 	}
482 
483 	if (!test_bit(HCI_RUNNING, &hdev->flags))
484 		return -EBUSY;
485 
486 	data = hdev->driver_data;
487 
488 	switch (bt_cb(skb)->pkt_type) {
489 	case HCI_COMMAND_PKT:
490 		hdev->stat.cmd_tx++;
491 		break;
492 	case HCI_ACLDATA_PKT:
493 		hdev->stat.acl_tx++;
494 		break;
495 	case HCI_SCODATA_PKT:
496 		hdev->stat.sco_tx++;
497 		break;
498 	};
499 
500 	/* Prepend skb with frame type */
501 	memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
502 
503 	count = skb->len;
504 
505 	/* Max HCI frame size seems to be 1511 + 1 */
506 	nskb = bt_skb_alloc(count + 32, GFP_ATOMIC);
507 	if (!nskb) {
508 		BT_ERR("Can't allocate memory for new packet");
509 		return -ENOMEM;
510 	}
511 
512 	nskb->dev = (void *) data;
513 
514 	while (count) {
515 		size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE);
516 
517 		buf[0] = 0xc1 | ((sent == 0) ? 0x04 : 0) | ((count == size) ? 0x08 : 0);
518 		buf[1] = 0x00;
519 		buf[2] = (size == BFUSB_MAX_BLOCK_SIZE) ? 0 : size;
520 
521 		memcpy(skb_put(nskb, 3), buf, 3);
522 		skb_copy_from_linear_data_offset(skb, sent, skb_put(nskb, size), size);
523 
524 		sent  += size;
525 		count -= size;
526 	}
527 
528 	/* Don't send frame with multiple size of bulk max packet */
529 	if ((nskb->len % data->bulk_pkt_size) == 0) {
530 		buf[0] = 0xdd;
531 		buf[1] = 0x00;
532 		memcpy(skb_put(nskb, 2), buf, 2);
533 	}
534 
535 	read_lock(&data->lock);
536 
537 	skb_queue_tail(&data->transmit_q, nskb);
538 	bfusb_tx_wakeup(data);
539 
540 	read_unlock(&data->lock);
541 
542 	kfree_skb(skb);
543 
544 	return 0;
545 }
546 
547 static void bfusb_destruct(struct hci_dev *hdev)
548 {
549 	struct bfusb_data *data = hdev->driver_data;
550 
551 	BT_DBG("hdev %p bfusb %p", hdev, data);
552 
553 	kfree(data);
554 }
555 
556 static int bfusb_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
557 {
558 	return -ENOIOCTLCMD;
559 }
560 
561 static int bfusb_load_firmware(struct bfusb_data *data,
562 			       const unsigned char *firmware, int count)
563 {
564 	unsigned char *buf;
565 	int err, pipe, len, size, sent = 0;
566 
567 	BT_DBG("bfusb %p udev %p", data, data->udev);
568 
569 	BT_INFO("BlueFRITZ! USB loading firmware");
570 
571 	pipe = usb_sndctrlpipe(data->udev, 0);
572 
573 	if (usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
574 				0, 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT) < 0) {
575 		BT_ERR("Can't change to loading configuration");
576 		return -EBUSY;
577 	}
578 
579 	data->udev->toggle[0] = data->udev->toggle[1] = 0;
580 
581 	buf = kmalloc(BFUSB_MAX_BLOCK_SIZE + 3, GFP_ATOMIC);
582 	if (!buf) {
583 		BT_ERR("Can't allocate memory chunk for firmware");
584 		return -ENOMEM;
585 	}
586 
587 	pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
588 
589 	while (count) {
590 		size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE + 3);
591 
592 		memcpy(buf, firmware + sent, size);
593 
594 		err = usb_bulk_msg(data->udev, pipe, buf, size,
595 					&len, BFUSB_BLOCK_TIMEOUT);
596 
597 		if (err || (len != size)) {
598 			BT_ERR("Error in firmware loading");
599 			goto error;
600 		}
601 
602 		sent  += size;
603 		count -= size;
604 	}
605 
606 	err = usb_bulk_msg(data->udev, pipe, NULL, 0,
607 					&len, BFUSB_BLOCK_TIMEOUT);
608 	if (err < 0) {
609 		BT_ERR("Error in null packet request");
610 		goto error;
611 	}
612 
613 	pipe = usb_sndctrlpipe(data->udev, 0);
614 
615 	err = usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
616 				0, 2, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
617 	if (err < 0) {
618 		BT_ERR("Can't change to running configuration");
619 		goto error;
620 	}
621 
622 	data->udev->toggle[0] = data->udev->toggle[1] = 0;
623 
624 	BT_INFO("BlueFRITZ! USB device ready");
625 
626 	kfree(buf);
627 	return 0;
628 
629 error:
630 	kfree(buf);
631 
632 	pipe = usb_sndctrlpipe(data->udev, 0);
633 
634 	usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
635 				0, 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
636 
637 	return err;
638 }
639 
640 static int bfusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
641 {
642 	const struct firmware *firmware;
643 	struct usb_device *udev = interface_to_usbdev(intf);
644 	struct usb_host_endpoint *bulk_out_ep;
645 	struct usb_host_endpoint *bulk_in_ep;
646 	struct hci_dev *hdev;
647 	struct bfusb_data *data;
648 
649 	BT_DBG("intf %p id %p", intf, id);
650 
651 	/* Check number of endpoints */
652 	if (intf->cur_altsetting->desc.bNumEndpoints < 2)
653 		return -EIO;
654 
655 	bulk_out_ep = &intf->cur_altsetting->endpoint[0];
656 	bulk_in_ep  = &intf->cur_altsetting->endpoint[1];
657 
658 	if (!bulk_out_ep || !bulk_in_ep) {
659 		BT_ERR("Bulk endpoints not found");
660 		goto done;
661 	}
662 
663 	/* Initialize control structure and load firmware */
664 	data = kzalloc(sizeof(struct bfusb_data), GFP_KERNEL);
665 	if (!data) {
666 		BT_ERR("Can't allocate memory for control structure");
667 		goto done;
668 	}
669 
670 	data->udev = udev;
671 	data->bulk_in_ep    = bulk_in_ep->desc.bEndpointAddress;
672 	data->bulk_out_ep   = bulk_out_ep->desc.bEndpointAddress;
673 	data->bulk_pkt_size = le16_to_cpu(bulk_out_ep->desc.wMaxPacketSize);
674 
675 	rwlock_init(&data->lock);
676 
677 	data->reassembly = NULL;
678 
679 	skb_queue_head_init(&data->transmit_q);
680 	skb_queue_head_init(&data->pending_q);
681 	skb_queue_head_init(&data->completed_q);
682 
683 	if (request_firmware(&firmware, "bfubase.frm", &udev->dev) < 0) {
684 		BT_ERR("Firmware request failed");
685 		goto error;
686 	}
687 
688 	BT_DBG("firmware data %p size %zu", firmware->data, firmware->size);
689 
690 	if (bfusb_load_firmware(data, firmware->data, firmware->size) < 0) {
691 		BT_ERR("Firmware loading failed");
692 		goto release;
693 	}
694 
695 	release_firmware(firmware);
696 
697 	/* Initialize and register HCI device */
698 	hdev = hci_alloc_dev();
699 	if (!hdev) {
700 		BT_ERR("Can't allocate HCI device");
701 		goto error;
702 	}
703 
704 	data->hdev = hdev;
705 
706 	hdev->bus = HCI_USB;
707 	hdev->driver_data = data;
708 	SET_HCIDEV_DEV(hdev, &intf->dev);
709 
710 	hdev->open     = bfusb_open;
711 	hdev->close    = bfusb_close;
712 	hdev->flush    = bfusb_flush;
713 	hdev->send     = bfusb_send_frame;
714 	hdev->destruct = bfusb_destruct;
715 	hdev->ioctl    = bfusb_ioctl;
716 
717 	hdev->owner = THIS_MODULE;
718 
719 	if (hci_register_dev(hdev) < 0) {
720 		BT_ERR("Can't register HCI device");
721 		hci_free_dev(hdev);
722 		goto error;
723 	}
724 
725 	usb_set_intfdata(intf, data);
726 
727 	return 0;
728 
729 release:
730 	release_firmware(firmware);
731 
732 error:
733 	kfree(data);
734 
735 done:
736 	return -EIO;
737 }
738 
739 static void bfusb_disconnect(struct usb_interface *intf)
740 {
741 	struct bfusb_data *data = usb_get_intfdata(intf);
742 	struct hci_dev *hdev = data->hdev;
743 
744 	BT_DBG("intf %p", intf);
745 
746 	if (!hdev)
747 		return;
748 
749 	usb_set_intfdata(intf, NULL);
750 
751 	bfusb_close(hdev);
752 
753 	if (hci_unregister_dev(hdev) < 0)
754 		BT_ERR("Can't unregister HCI device %s", hdev->name);
755 
756 	hci_free_dev(hdev);
757 }
758 
759 static struct usb_driver bfusb_driver = {
760 	.name		= "bfusb",
761 	.probe		= bfusb_probe,
762 	.disconnect	= bfusb_disconnect,
763 	.id_table	= bfusb_table,
764 };
765 
766 static int __init bfusb_init(void)
767 {
768 	int err;
769 
770 	BT_INFO("BlueFRITZ! USB driver ver %s", VERSION);
771 
772 	err = usb_register(&bfusb_driver);
773 	if (err < 0)
774 		BT_ERR("Failed to register BlueFRITZ! USB driver");
775 
776 	return err;
777 }
778 
779 static void __exit bfusb_exit(void)
780 {
781 	usb_deregister(&bfusb_driver);
782 }
783 
784 module_init(bfusb_init);
785 module_exit(bfusb_exit);
786 
787 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
788 MODULE_DESCRIPTION("BlueFRITZ! USB driver ver " VERSION);
789 MODULE_VERSION(VERSION);
790 MODULE_LICENSE("GPL");
791 MODULE_FIRMWARE("bfubase.frm");
792