[Bluetooth] Code cleanup of the drivers source code
[pandora-kernel.git] / drivers / bluetooth / bfusb.c
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/sched.h>
31 #include <linux/errno.h>
32 #include <linux/skbuff.h>
33
34 #include <linux/device.h>
35 #include <linux/firmware.h>
36
37 #include <linux/usb.h>
38
39 #include <net/bluetooth/bluetooth.h>
40 #include <net/bluetooth/hci_core.h>
41
42 #ifndef CONFIG_BT_HCIBFUSB_DEBUG
43 #undef  BT_DBG
44 #define BT_DBG(D...)
45 #endif
46
47 #define VERSION "1.1"
48
49 static int ignore = 0;
50
51 static struct usb_driver bfusb_driver;
52
53 static struct usb_device_id bfusb_table[] = {
54         /* AVM BlueFRITZ! USB */
55         { USB_DEVICE(0x057c, 0x2200) },
56
57         { }     /* Terminating entry */
58 };
59
60 MODULE_DEVICE_TABLE(usb, bfusb_table);
61
62 #define BFUSB_MAX_BLOCK_SIZE    256
63
64 #define BFUSB_BLOCK_TIMEOUT     3000
65
66 #define BFUSB_TX_PROCESS        1
67 #define BFUSB_TX_WAKEUP         2
68
69 #define BFUSB_MAX_BULK_TX       2
70 #define BFUSB_MAX_BULK_RX       2
71
72 struct bfusb_data {
73         struct hci_dev          *hdev;
74
75         unsigned long           state;
76
77         struct usb_device       *udev;
78
79         unsigned int            bulk_in_ep;
80         unsigned int            bulk_out_ep;
81         unsigned int            bulk_pkt_size;
82
83         rwlock_t                lock;
84
85         struct sk_buff_head     transmit_q;
86
87         struct sk_buff          *reassembly;
88
89         atomic_t                pending_tx;
90         struct sk_buff_head     pending_q;
91         struct sk_buff_head     completed_q;
92 };
93
94 struct bfusb_data_scb {
95         struct urb *urb;
96 };
97
98 static void bfusb_tx_complete(struct urb *urb, struct pt_regs *regs);
99 static void bfusb_rx_complete(struct urb *urb, struct pt_regs *regs);
100
101 static struct urb *bfusb_get_completed(struct bfusb_data *data)
102 {
103         struct sk_buff *skb;
104         struct urb *urb = NULL;
105
106         BT_DBG("bfusb %p", data);
107
108         skb = skb_dequeue(&data->completed_q);
109         if (skb) {
110                 urb = ((struct bfusb_data_scb *) skb->cb)->urb;
111                 kfree_skb(skb);
112         }
113
114         return urb;
115 }
116
117 static void bfusb_unlink_urbs(struct bfusb_data *data)
118 {
119         struct sk_buff *skb;
120         struct urb *urb;
121
122         BT_DBG("bfusb %p", data);
123
124         while ((skb = skb_dequeue(&data->pending_q))) {
125                 urb = ((struct bfusb_data_scb *) skb->cb)->urb;
126                 usb_kill_urb(urb);
127                 skb_queue_tail(&data->completed_q, skb);
128         }
129
130         while ((urb = bfusb_get_completed(data)))
131                 usb_free_urb(urb);
132 }
133
134 static int bfusb_send_bulk(struct bfusb_data *data, struct sk_buff *skb)
135 {
136         struct bfusb_data_scb *scb = (void *) skb->cb;
137         struct urb *urb = bfusb_get_completed(data);
138         int err, pipe;
139
140         BT_DBG("bfusb %p skb %p len %d", data, skb, skb->len);
141
142         if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
143                 return -ENOMEM;
144
145         pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
146
147         usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, skb->len,
148                         bfusb_tx_complete, skb);
149
150         scb->urb = urb;
151
152         skb_queue_tail(&data->pending_q, skb);
153
154         err = usb_submit_urb(urb, GFP_ATOMIC);
155         if (err) {
156                 BT_ERR("%s bulk tx submit failed urb %p err %d", 
157                                         data->hdev->name, urb, err);
158                 skb_unlink(skb, &data->pending_q);
159                 usb_free_urb(urb);
160         } else
161                 atomic_inc(&data->pending_tx);
162
163         return err;
164 }
165
166 static void bfusb_tx_wakeup(struct bfusb_data *data)
167 {
168         struct sk_buff *skb;
169
170         BT_DBG("bfusb %p", data);
171
172         if (test_and_set_bit(BFUSB_TX_PROCESS, &data->state)) {
173                 set_bit(BFUSB_TX_WAKEUP, &data->state);
174                 return;
175         }
176
177         do {
178                 clear_bit(BFUSB_TX_WAKEUP, &data->state);
179
180                 while ((atomic_read(&data->pending_tx) < BFUSB_MAX_BULK_TX) &&
181                                 (skb = skb_dequeue(&data->transmit_q))) {
182                         if (bfusb_send_bulk(data, skb) < 0) {
183                                 skb_queue_head(&data->transmit_q, skb);
184                                 break;
185                         }
186                 }
187
188         } while (test_bit(BFUSB_TX_WAKEUP, &data->state));
189
190         clear_bit(BFUSB_TX_PROCESS, &data->state);
191 }
192
193 static void bfusb_tx_complete(struct urb *urb, struct pt_regs *regs)
194 {
195         struct sk_buff *skb = (struct sk_buff *) urb->context;
196         struct bfusb_data *data = (struct bfusb_data *) skb->dev;
197
198         BT_DBG("bfusb %p urb %p skb %p len %d", data, urb, skb, skb->len);
199
200         atomic_dec(&data->pending_tx);
201
202         if (!test_bit(HCI_RUNNING, &data->hdev->flags))
203                 return;
204
205         if (!urb->status)
206                 data->hdev->stat.byte_tx += skb->len;
207         else
208                 data->hdev->stat.err_tx++;
209
210         read_lock(&data->lock);
211
212         skb_unlink(skb, &data->pending_q);
213         skb_queue_tail(&data->completed_q, skb);
214
215         bfusb_tx_wakeup(data);
216
217         read_unlock(&data->lock);
218 }
219
220
221 static int bfusb_rx_submit(struct bfusb_data *data, struct urb *urb)
222 {
223         struct bfusb_data_scb *scb;
224         struct sk_buff *skb;
225         int err, pipe, size = HCI_MAX_FRAME_SIZE + 32;
226
227         BT_DBG("bfusb %p urb %p", bfusb, urb);
228
229         if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
230                 return -ENOMEM;
231
232         skb = bt_skb_alloc(size, GFP_ATOMIC);
233         if (!skb) {
234                 usb_free_urb(urb);
235                 return -ENOMEM;
236         }
237
238         skb->dev = (void *) data;
239
240         scb = (struct bfusb_data_scb *) skb->cb;
241         scb->urb = urb;
242
243         pipe = usb_rcvbulkpipe(data->udev, data->bulk_in_ep);
244
245         usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, size,
246                         bfusb_rx_complete, skb);
247
248         skb_queue_tail(&data->pending_q, skb);
249
250         err = usb_submit_urb(urb, GFP_ATOMIC);
251         if (err) {
252                 BT_ERR("%s bulk rx submit failed urb %p err %d",
253                                         data->hdev->name, urb, err);
254                 skb_unlink(skb, &data->pending_q);
255                 kfree_skb(skb);
256                 usb_free_urb(urb);
257         }
258
259         return err;
260 }
261
262 static inline int bfusb_recv_block(struct bfusb_data *data, int hdr, unsigned char *buf, int len)
263 {
264         BT_DBG("bfusb %p hdr 0x%02x data %p len %d", data, hdr, buf, len);
265
266         if (hdr & 0x10) {
267                 BT_ERR("%s error in block", data->hdev->name);
268                 if (data->reassembly)
269                         kfree_skb(data->reassembly);
270                 data->reassembly = NULL;
271                 return -EIO;
272         }
273
274         if (hdr & 0x04) {
275                 struct sk_buff *skb;
276                 unsigned char pkt_type;
277                 int pkt_len = 0;
278
279                 if (data->reassembly) {
280                         BT_ERR("%s unexpected start block", data->hdev->name);
281                         kfree_skb(data->reassembly);
282                         data->reassembly = NULL;
283                 }
284
285                 if (len < 1) {
286                         BT_ERR("%s no packet type found", data->hdev->name);
287                         return -EPROTO;
288                 }
289
290                 pkt_type = *buf++; len--;
291
292                 switch (pkt_type) {
293                 case HCI_EVENT_PKT:
294                         if (len >= HCI_EVENT_HDR_SIZE) {
295                                 struct hci_event_hdr *hdr = (struct hci_event_hdr *) buf;
296                                 pkt_len = HCI_EVENT_HDR_SIZE + hdr->plen;
297                         } else {
298                                 BT_ERR("%s event block is too short", data->hdev->name);
299                                 return -EILSEQ;
300                         }
301                         break;
302
303                 case HCI_ACLDATA_PKT:
304                         if (len >= HCI_ACL_HDR_SIZE) {
305                                 struct hci_acl_hdr *hdr = (struct hci_acl_hdr *) buf;
306                                 pkt_len = HCI_ACL_HDR_SIZE + __le16_to_cpu(hdr->dlen);
307                         } else {
308                                 BT_ERR("%s data block is too short", data->hdev->name);
309                                 return -EILSEQ;
310                         }
311                         break;
312
313                 case HCI_SCODATA_PKT:
314                         if (len >= HCI_SCO_HDR_SIZE) {
315                                 struct hci_sco_hdr *hdr = (struct hci_sco_hdr *) buf;
316                                 pkt_len = HCI_SCO_HDR_SIZE + hdr->dlen;
317                         } else {
318                                 BT_ERR("%s audio block is too short", data->hdev->name);
319                                 return -EILSEQ;
320                         }
321                         break;
322                 }
323
324                 skb = bt_skb_alloc(pkt_len, GFP_ATOMIC);
325                 if (!skb) {
326                         BT_ERR("%s no memory for the packet", data->hdev->name);
327                         return -ENOMEM;
328                 }
329
330                 skb->dev = (void *) data->hdev;
331                 bt_cb(skb)->pkt_type = pkt_type;
332
333                 data->reassembly = skb;
334         } else {
335                 if (!data->reassembly) {
336                         BT_ERR("%s unexpected continuation block", data->hdev->name);
337                         return -EIO;
338                 }
339         }
340
341         if (len > 0)
342                 memcpy(skb_put(data->reassembly, len), buf, len);
343
344         if (hdr & 0x08) {
345                 hci_recv_frame(data->reassembly);
346                 data->reassembly = NULL;
347         }
348
349         return 0;
350 }
351
352 static void bfusb_rx_complete(struct urb *urb, struct pt_regs *regs)
353 {
354         struct sk_buff *skb = (struct sk_buff *) urb->context;
355         struct bfusb_data *data = (struct bfusb_data *) skb->dev;
356         unsigned char *buf = urb->transfer_buffer;
357         int count = urb->actual_length;
358         int err, hdr, len;
359
360         BT_DBG("bfusb %p urb %p skb %p len %d", bfusb, urb, skb, skb->len);
361
362         read_lock(&data->lock);
363
364         if (!test_bit(HCI_RUNNING, &data->hdev->flags))
365                 goto unlock;
366
367         if (urb->status || !count)
368                 goto resubmit;
369
370         data->hdev->stat.byte_rx += count;
371
372         skb_put(skb, count);
373
374         while (count) {
375                 hdr = buf[0] | (buf[1] << 8);
376
377                 if (hdr & 0x4000) {
378                         len = 0;
379                         count -= 2;
380                         buf   += 2;
381                 } else {
382                         len = (buf[2] == 0) ? 256 : buf[2];
383                         count -= 3;
384                         buf   += 3;
385                 }
386
387                 if (count < len) {
388                         BT_ERR("%s block extends over URB buffer ranges",
389                                         data->hdev->name);
390                 }
391
392                 if ((hdr & 0xe1) == 0xc1)
393                         bfusb_recv_block(data, hdr, buf, len);
394
395                 count -= len;
396                 buf   += len;
397         }
398
399         skb_unlink(skb, &data->pending_q);
400         kfree_skb(skb);
401
402         bfusb_rx_submit(data, urb);
403
404         read_unlock(&data->lock);
405
406         return;
407
408 resubmit:
409         urb->dev = data->udev;
410
411         err = usb_submit_urb(urb, GFP_ATOMIC);
412         if (err) {
413                 BT_ERR("%s bulk resubmit failed urb %p err %d",
414                                         data->hdev->name, urb, err);
415         }
416
417 unlock:
418         read_unlock(&data->lock);
419 }
420
421 static int bfusb_open(struct hci_dev *hdev)
422 {
423         struct bfusb_data *data = hdev->driver_data;
424         unsigned long flags;
425         int i, err;
426
427         BT_DBG("hdev %p bfusb %p", hdev, data);
428
429         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
430                 return 0;
431
432         write_lock_irqsave(&data->lock, flags);
433
434         err = bfusb_rx_submit(data, NULL);
435         if (!err) {
436                 for (i = 1; i < BFUSB_MAX_BULK_RX; i++)
437                         bfusb_rx_submit(data, NULL);
438         } else {
439                 clear_bit(HCI_RUNNING, &hdev->flags);
440         }
441
442         write_unlock_irqrestore(&data->lock, flags);
443
444         return err;
445 }
446
447 static int bfusb_flush(struct hci_dev *hdev)
448 {
449         struct bfusb_data *data = hdev->driver_data;
450
451         BT_DBG("hdev %p bfusb %p", hdev, data);
452
453         skb_queue_purge(&data->transmit_q);
454
455         return 0;
456 }
457
458 static int bfusb_close(struct hci_dev *hdev)
459 {
460         struct bfusb_data *data = hdev->driver_data;
461         unsigned long flags;
462
463         BT_DBG("hdev %p bfusb %p", hdev, data);
464
465         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
466                 return 0;
467
468         write_lock_irqsave(&data->lock, flags);
469         write_unlock_irqrestore(&data->lock, flags);
470
471         bfusb_unlink_urbs(data);
472         bfusb_flush(hdev);
473
474         return 0;
475 }
476
477 static int bfusb_send_frame(struct sk_buff *skb)
478 {
479         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
480         struct bfusb_data *data;
481         struct sk_buff *nskb;
482         unsigned char buf[3];
483         int sent = 0, size, count;
484
485         BT_DBG("hdev %p skb %p type %d len %d", hdev, skb, bt_cb(skb)->pkt_type, skb->len);
486
487         if (!hdev) {
488                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
489                 return -ENODEV;
490         }
491
492         if (!test_bit(HCI_RUNNING, &hdev->flags))
493                 return -EBUSY;
494
495         data = hdev->driver_data;
496
497         switch (bt_cb(skb)->pkt_type) {
498         case HCI_COMMAND_PKT:
499                 hdev->stat.cmd_tx++;
500                 break;
501         case HCI_ACLDATA_PKT:
502                 hdev->stat.acl_tx++;
503                 break;
504         case HCI_SCODATA_PKT:
505                 hdev->stat.sco_tx++;
506                 break;
507         };
508
509         /* Prepend skb with frame type */
510         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
511
512         count = skb->len;
513
514         /* Max HCI frame size seems to be 1511 + 1 */
515         nskb = bt_skb_alloc(count + 32, GFP_ATOMIC);
516         if (!nskb) {
517                 BT_ERR("Can't allocate memory for new packet");
518                 return -ENOMEM;
519         }
520
521         nskb->dev = (void *) data;
522
523         while (count) {
524                 size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE);
525
526                 buf[0] = 0xc1 | ((sent == 0) ? 0x04 : 0) | ((count == size) ? 0x08 : 0);
527                 buf[1] = 0x00;
528                 buf[2] = (size == BFUSB_MAX_BLOCK_SIZE) ? 0 : size;
529
530                 memcpy(skb_put(nskb, 3), buf, 3);
531                 memcpy(skb_put(nskb, size), skb->data + sent, size);
532
533                 sent  += size;
534                 count -= size;
535         }
536
537         /* Don't send frame with multiple size of bulk max packet */
538         if ((nskb->len % data->bulk_pkt_size) == 0) {
539                 buf[0] = 0xdd;
540                 buf[1] = 0x00;
541                 memcpy(skb_put(nskb, 2), buf, 2);
542         }
543
544         read_lock(&data->lock);
545
546         skb_queue_tail(&data->transmit_q, nskb);
547         bfusb_tx_wakeup(data);
548
549         read_unlock(&data->lock);
550
551         kfree_skb(skb);
552
553         return 0;
554 }
555
556 static void bfusb_destruct(struct hci_dev *hdev)
557 {
558         struct bfusb_data *data = hdev->driver_data;
559
560         BT_DBG("hdev %p bfusb %p", hdev, data);
561
562         kfree(data);
563 }
564
565 static int bfusb_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
566 {
567         return -ENOIOCTLCMD;
568 }
569
570 static int bfusb_load_firmware(struct bfusb_data *data, unsigned char *firmware, int count)
571 {
572         unsigned char *buf;
573         int err, pipe, len, size, sent = 0;
574
575         BT_DBG("bfusb %p udev %p", data, data->udev);
576
577         BT_INFO("BlueFRITZ! USB loading firmware");
578
579         pipe = usb_sndctrlpipe(data->udev, 0);
580
581         if (usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
582                                 0, 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT) < 0) {
583                 BT_ERR("Can't change to loading configuration");
584                 return -EBUSY;
585         }
586
587         data->udev->toggle[0] = data->udev->toggle[1] = 0;
588
589         buf = kmalloc(BFUSB_MAX_BLOCK_SIZE + 3, GFP_ATOMIC);
590         if (!buf) {
591                 BT_ERR("Can't allocate memory chunk for firmware");
592                 return -ENOMEM;
593         }
594
595         pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
596
597         while (count) {
598                 size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE + 3);
599
600                 memcpy(buf, firmware + sent, size);
601
602                 err = usb_bulk_msg(data->udev, pipe, buf, size,
603                                         &len, BFUSB_BLOCK_TIMEOUT);
604
605                 if (err || (len != size)) {
606                         BT_ERR("Error in firmware loading");
607                         goto error;
608                 }
609
610                 sent  += size;
611                 count -= size;
612         }
613
614         err = usb_bulk_msg(data->udev, pipe, NULL, 0,
615                                         &len, BFUSB_BLOCK_TIMEOUT);
616         if (err < 0) {
617                 BT_ERR("Error in null packet request");
618                 goto error;
619         }
620
621         pipe = usb_sndctrlpipe(data->udev, 0);
622
623         err = usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
624                                 0, 2, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
625         if (err < 0) {
626                 BT_ERR("Can't change to running configuration");
627                 goto error;
628         }
629
630         data->udev->toggle[0] = data->udev->toggle[1] = 0;
631
632         BT_INFO("BlueFRITZ! USB device ready");
633
634         kfree(buf);
635         return 0;
636
637 error:
638         kfree(buf);
639
640         pipe = usb_sndctrlpipe(data->udev, 0);
641
642         usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
643                                 0, 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
644
645         return err;
646 }
647
648 static int bfusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
649 {
650         const struct firmware *firmware;
651         struct usb_device *udev = interface_to_usbdev(intf);
652         struct usb_host_endpoint *bulk_out_ep;
653         struct usb_host_endpoint *bulk_in_ep;
654         struct hci_dev *hdev;
655         struct bfusb_data *data;
656
657         BT_DBG("intf %p id %p", intf, id);
658
659         if (ignore)
660                 return -ENODEV;
661
662         /* Check number of endpoints */
663         if (intf->cur_altsetting->desc.bNumEndpoints < 2)
664                 return -EIO;
665
666         bulk_out_ep = &intf->cur_altsetting->endpoint[0];
667         bulk_in_ep  = &intf->cur_altsetting->endpoint[1];
668
669         if (!bulk_out_ep || !bulk_in_ep) {
670                 BT_ERR("Bulk endpoints not found");
671                 goto done;
672         }
673
674         /* Initialize control structure and load firmware */
675         data = kzalloc(sizeof(struct bfusb_data), GFP_KERNEL);
676         if (!data) {
677                 BT_ERR("Can't allocate memory for control structure");
678                 goto done;
679         }
680
681         data->udev = udev;
682         data->bulk_in_ep    = bulk_in_ep->desc.bEndpointAddress;
683         data->bulk_out_ep   = bulk_out_ep->desc.bEndpointAddress;
684         data->bulk_pkt_size = le16_to_cpu(bulk_out_ep->desc.wMaxPacketSize);
685
686         rwlock_init(&data->lock);
687
688         data->reassembly = NULL;
689
690         skb_queue_head_init(&data->transmit_q);
691         skb_queue_head_init(&data->pending_q);
692         skb_queue_head_init(&data->completed_q);
693
694         if (request_firmware(&firmware, "bfubase.frm", &udev->dev) < 0) {
695                 BT_ERR("Firmware request failed");
696                 goto error;
697         }
698
699         BT_DBG("firmware data %p size %d", firmware->data, firmware->size);
700
701         if (bfusb_load_firmware(data, firmware->data, firmware->size) < 0) {
702                 BT_ERR("Firmware loading failed");
703                 goto release;
704         }
705
706         release_firmware(firmware);
707
708         /* Initialize and register HCI device */
709         hdev = hci_alloc_dev();
710         if (!hdev) {
711                 BT_ERR("Can't allocate HCI device");
712                 goto error;
713         }
714
715         data->hdev = hdev;
716
717         hdev->type = HCI_USB;
718         hdev->driver_data = data;
719         SET_HCIDEV_DEV(hdev, &intf->dev);
720
721         hdev->open     = bfusb_open;
722         hdev->close    = bfusb_close;
723         hdev->flush    = bfusb_flush;
724         hdev->send     = bfusb_send_frame;
725         hdev->destruct = bfusb_destruct;
726         hdev->ioctl    = bfusb_ioctl;
727
728         hdev->owner = THIS_MODULE;
729
730         if (hci_register_dev(hdev) < 0) {
731                 BT_ERR("Can't register HCI device");
732                 hci_free_dev(hdev);
733                 goto error;
734         }
735
736         usb_set_intfdata(intf, data);
737
738         return 0;
739
740 release:
741         release_firmware(firmware);
742
743 error:
744         kfree(data);
745
746 done:
747         return -EIO;
748 }
749
750 static void bfusb_disconnect(struct usb_interface *intf)
751 {
752         struct bfusb_data *data = usb_get_intfdata(intf);
753         struct hci_dev *hdev = data->hdev;
754
755         BT_DBG("intf %p", intf);
756
757         if (!hdev)
758                 return;
759
760         usb_set_intfdata(intf, NULL);
761
762         bfusb_close(hdev);
763
764         if (hci_unregister_dev(hdev) < 0)
765                 BT_ERR("Can't unregister HCI device %s", hdev->name);
766
767         hci_free_dev(hdev);
768 }
769
770 static struct usb_driver bfusb_driver = {
771         .name           = "bfusb",
772         .probe          = bfusb_probe,
773         .disconnect     = bfusb_disconnect,
774         .id_table       = bfusb_table,
775 };
776
777 static int __init bfusb_init(void)
778 {
779         int err;
780
781         BT_INFO("BlueFRITZ! USB driver ver %s", VERSION);
782
783         err = usb_register(&bfusb_driver);
784         if (err < 0)
785                 BT_ERR("Failed to register BlueFRITZ! USB driver");
786
787         return err;
788 }
789
790 static void __exit bfusb_exit(void)
791 {
792         usb_deregister(&bfusb_driver);
793 }
794
795 module_init(bfusb_init);
796 module_exit(bfusb_exit);
797
798 module_param(ignore, bool, 0644);
799 MODULE_PARM_DESC(ignore, "Ignore devices from the matching table");
800
801 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
802 MODULE_DESCRIPTION("BlueFRITZ! USB driver ver " VERSION);
803 MODULE_VERSION(VERSION);
804 MODULE_LICENSE("GPL");