1 /*
2 * bluetooth.c Version 0.12
3 *
4 * Copyright (c) 2000, 2001 Greg Kroah-Hartman <greg@kroah.com>
5 * Copyright (c) 2000 Mark Douglas Corner <mcorner@umich.edu>
6 *
7 * USB Bluetooth driver, based on the Bluetooth Spec version 1.0B
8 *
9 * (2001/07/09) Version 0.12 gkh
10 * - removed in_interrupt() call, as it doesn't make sense to do
11 * that anymore.
12 *
13 * (2001/06/05) Version 0.11 gkh
14 * - Fixed problem with read urb status saying that we have shutdown,
15 * and that we shouldn't resubmit the urb. Patch from unknown.
16 *
17 * (2001/05/28) Version 0.10 gkh
18 * - Fixed problem with using data from userspace in the bluetooth_write
19 * function as found by the CHECKER project.
20 * - Added a buffer to the write_urb_pool which reduces the number of
21 * buffers being created and destroyed for ever write. Also cleans
22 * up the logic a bit.
23 * - Added a buffer to the control_urb_pool which fixes a memory leak
24 * when the device is removed from the system.
25 *
26 * (2001/05/28) Version 0.9 gkh
27 * Fixed problem with bluetooth==NULL for bluetooth_read_bulk_callback
28 * which was found by both the CHECKER project and Mikko Rahkonen.
29 *
30 * (08/04/2001) gb
31 * Identify version on module load.
32 *
33 * (2001/03/10) Version 0.8 gkh
34 * Fixed problem with not unlinking interrupt urb on device close
35 * and resubmitting the read urb on error with bluetooth struct.
36 * Thanks to Narayan Mohanram <narayan@RovingNetworks.com> for the
37 * fixes.
38 *
39 * (11/29/2000) Version 0.7 gkh
40 * Fixed problem with overrunning the tty flip buffer.
41 * Removed unneeded NULL pointer initialization.
42 *
43 * (10/05/2000) Version 0.6 gkh
44 * Fixed bug with urb->dev not being set properly, now that the usb
45 * core needs it.
46 * Got a real major id number and name.
47 *
48 * (08/06/2000) Version 0.5 gkh
49 * Fixed problem of not resubmitting the bulk read urb if there is
50 * an error in the callback. Ericsson devices seem to need this.
51 *
52 * (07/11/2000) Version 0.4 gkh
53 * Fixed bug in disconnect for when we call tty_hangup
54 * Fixed bug in bluetooth_ctrl_msg where the bluetooth struct was not
55 * getting attached to the control urb properly.
56 * Fixed bug in bluetooth_write where we pay attention to the result
57 * of bluetooth_ctrl_msg.
58 *
59 * (08/03/2000) Version 0.3 gkh mdc
60 * Merged in Mark's changes to make the driver play nice with the Axis
61 * stack.
62 * Made the write bulk use an urb pool to enable larger transfers with
63 * fewer calls to the driver.
64 * Fixed off by one bug in acl pkt receive
65 * Made packet counters specific to each bluetooth device
66 * Added checks for zero length callbacks
67 * Added buffers for int and bulk packets. Had to do this otherwise
68 * packet types could intermingle.
69 * Made a control urb pool for the control messages.
70 *
71 * (07/11/2000) Version 0.2 gkh
72 * Fixed a small bug found by Nils Faerber in the usb_bluetooth_probe
73 * function.
74 *
75 * (07/09/2000) Version 0.1 gkh
76 * Initial release. Has support for sending ACL data (which is really just
77 * a HCI frame.) Raw HCI commands and HCI events are not supported.
78 * A ioctl will probably be needed for the HCI commands and events in the
79 * future. All isoch endpoints are ignored at this time also.
80 * This driver should work for all currently shipping USB Bluetooth
81 * devices at this time :)
82 *
83 */
84
85 /*
86 * This program is free software; you can redistribute it and/or modify
87 * it under the terms of the GNU General Public License as published by
88 * the Free Software Foundation; either version 2 of the License, or
89 * (at your option) any later version.
90 *
91 * This program is distributed in the hope that it will be useful,
92 * but WITHOUT ANY WARRANTY; without even the implied warranty of
93 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
94 * GNU General Public License for more details.
95 *
96 * You should have received a copy of the GNU General Public License
97 * along with this program; if not, write to the Free Software
98 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
99 */
100
101
102 #include <linux/kernel.h>
103 #include <linux/sched.h>
104 #include <linux/signal.h>
105 #include <linux/errno.h>
106 #include <linux/poll.h>
107 #include <linux/init.h>
108 #include <linux/slab.h>
109 #include <linux/fcntl.h>
110 #include <linux/tty.h>
111 #include <linux/tty_driver.h>
112 #include <linux/tty_flip.h>
113 #include <linux/module.h>
114
115 #define DEBUG
116 #include <linux/usb.h>
117
118 /*
119 * Version Information
120 */
121 #define DRIVER_VERSION "v0.12"
122 #define DRIVER_AUTHOR "Greg Kroah-Hartman, Mark Douglas Corner"
123 #define DRIVER_DESC "USB Bluetooth tty driver"
124
125 /* define this if you have hardware that is not good */
126 /*#define BTBUGGYHARDWARE */
127
128 /* Class, SubClass, and Protocol codes that describe a Bluetooth device */
129 #define WIRELESS_CLASS_CODE 0xe0
130 #define RF_SUBCLASS_CODE 0x01
131 #define BLUETOOTH_PROGRAMMING_PROTOCOL_CODE 0x01
132
133
134 #define BLUETOOTH_TTY_MAJOR 216 /* real device node major id */
135 #define BLUETOOTH_TTY_MINORS 256 /* whole lotta bluetooth devices */
136
137 #define USB_BLUETOOTH_MAGIC 0x6d02 /* magic number for bluetooth struct */
138
139 #define BLUETOOTH_CONTROL_REQUEST_TYPE 0x20
140
141 /* Bluetooth packet types */
142 #define CMD_PKT 0x01
143 #define ACL_PKT 0x02
144 #define SCO_PKT 0x03
145 #define EVENT_PKT 0x04
146 #define ERROR_PKT 0x05
147 #define NEG_PKT 0x06
148
149 /* Message sizes */
150 #define MAX_EVENT_SIZE 0xFF
151 #define EVENT_HDR_SIZE 3 /* 2 for the header + 1 for the type indicator */
152 #define EVENT_BUFFER_SIZE (MAX_EVENT_SIZE + EVENT_HDR_SIZE)
153
154 #define MAX_ACL_SIZE 0xFFFF
155 #define ACL_HDR_SIZE 5 /* 4 for the header + 1 for the type indicator */
156 #define ACL_BUFFER_SIZE (MAX_ACL_SIZE + ACL_HDR_SIZE)
157
158 /* parity check flag */
159 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
160
161 #define CHAR2INT16(c1,c0) (((u32)((c1) & 0xff) << 8) + (u32)((c0) & 0xff))
162 #define MIN(a,b) (((a)<(b))?(a):(b))
163
164 #define NUM_BULK_URBS 24
165 #define NUM_CONTROL_URBS 16
166
167 struct usb_bluetooth {
168 int magic;
169 struct usb_device * dev;
170 struct tty_driver * tty_driver; /* the tty_driver for this device */
171 struct tty_struct * tty; /* the coresponding tty for this port */
172
173 unsigned char minor; /* the starting minor number for this device */
174 char active; /* someone has this device open */
175 int throttle; /* throttled by tty layer */
176
177 __u8 control_out_bInterfaceNum;
178 struct urb * control_urb_pool[NUM_CONTROL_URBS];
179 devrequest dr[NUM_CONTROL_URBS];
180
181 unsigned char * interrupt_in_buffer;
182 struct urb * interrupt_in_urb;
183 __u8 interrupt_in_endpointAddress;
184 __u8 interrupt_in_interval;
185 int interrupt_in_buffer_size;
186
187 unsigned char * bulk_in_buffer;
188 struct urb * read_urb;
189 __u8 bulk_in_endpointAddress;
190 int bulk_in_buffer_size;
191
192 int bulk_out_buffer_size;
193 struct urb * write_urb_pool[NUM_BULK_URBS];
194 __u8 bulk_out_endpointAddress;
195
196 wait_queue_head_t write_wait;
197
198 struct tq_struct tqueue; /* task queue for line discipline waking up */
199
200 unsigned int int_packet_pos;
201 unsigned char int_buffer[EVENT_BUFFER_SIZE];
202 unsigned int bulk_packet_pos;
203 unsigned char bulk_buffer[ACL_BUFFER_SIZE]; /* 64k preallocated, fix? */
204 };
205
206
207 /* local function prototypes */
208 static int bluetooth_open (struct tty_struct *tty, struct file *filp);
209 static void bluetooth_close (struct tty_struct *tty, struct file *filp);
210 static int bluetooth_write (struct tty_struct *tty, int from_user, const unsigned char *buf, int count);
211 static int bluetooth_write_room (struct tty_struct *tty);
212 static int bluetooth_chars_in_buffer (struct tty_struct *tty);
213 static void bluetooth_throttle (struct tty_struct *tty);
214 static void bluetooth_unthrottle (struct tty_struct *tty);
215 static int bluetooth_ioctl (struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
216 static void bluetooth_set_termios (struct tty_struct *tty, struct termios *old);
217
218 static void bluetooth_int_callback (struct urb *urb);
219 static void bluetooth_ctrl_callback (struct urb *urb);
220 static void bluetooth_read_bulk_callback (struct urb *urb);
221 static void bluetooth_write_bulk_callback (struct urb *urb);
222
223 static void * usb_bluetooth_probe(struct usb_device *dev, unsigned int ifnum,
224 const struct usb_device_id *id);
225 static void usb_bluetooth_disconnect (struct usb_device *dev, void *ptr);
226
227
228 static struct usb_device_id usb_bluetooth_ids [] = {
229 { USB_DEVICE_INFO(WIRELESS_CLASS_CODE, RF_SUBCLASS_CODE, BLUETOOTH_PROGRAMMING_PROTOCOL_CODE) },
230 { } /* Terminating entry */
231 };
232
233 MODULE_DEVICE_TABLE (usb, usb_bluetooth_ids);
234
235 static struct usb_driver usb_bluetooth_driver = {
236 name: "bluetooth",
237 probe: usb_bluetooth_probe,
238 disconnect: usb_bluetooth_disconnect,
239 id_table: usb_bluetooth_ids,
240 };
241
242 static int bluetooth_refcount;
243 static struct tty_driver bluetooth_tty_driver;
244 static struct tty_struct * bluetooth_tty[BLUETOOTH_TTY_MINORS];
245 static struct termios * bluetooth_termios[BLUETOOTH_TTY_MINORS];
246 static struct termios * bluetooth_termios_locked[BLUETOOTH_TTY_MINORS];
247 static struct usb_bluetooth *bluetooth_table[BLUETOOTH_TTY_MINORS];
248
249
250 static inline int bluetooth_paranoia_check (struct usb_bluetooth *bluetooth, const char *function)
251 {
252 if (!bluetooth) {
253 dbg("%s - bluetooth == NULL", function);
254 return -1;
255 }
256 if (bluetooth->magic != USB_BLUETOOTH_MAGIC) {
257 dbg("%s - bad magic number for bluetooth", function);
258 return -1;
259 }
260
261 return 0;
262 }
263
264
265 static inline struct usb_bluetooth* get_usb_bluetooth (struct usb_bluetooth *bluetooth, const char *function)
266 {
267 if (!bluetooth ||
268 bluetooth_paranoia_check (bluetooth, function)) {
269 /* then say that we dont have a valid usb_bluetooth thing, which will
270 * end up generating -ENODEV return values */
271 return NULL;
272 }
273
274 return bluetooth;
275 }
276
277
278 static inline struct usb_bluetooth *get_bluetooth_by_minor (int minor)
279 {
280 return bluetooth_table[minor];
281 }
282
283
284 static int bluetooth_ctrl_msg (struct usb_bluetooth *bluetooth, int request, int value, const unsigned char *buf, int len)
285 {
286 struct urb *urb = NULL;
287 devrequest *dr = NULL;
288 int i;
289 int status;
290
291 dbg (__FUNCTION__);
292
293 /* try to find a free urb in our list */
294 for (i = 0; i < NUM_CONTROL_URBS; ++i) {
295 if (bluetooth->control_urb_pool[i]->status != -EINPROGRESS) {
296 urb = bluetooth->control_urb_pool[i];
297 dr = &bluetooth->dr[i];
298 break;
299 }
300 }
301 if (urb == NULL) {
302 dbg (__FUNCTION__ " - no free urbs");
303 return -ENOMEM;
304 }
305
306 /* keep increasing the urb transfer buffer to fit the size of the message */
307 if (urb->transfer_buffer == NULL) {
308 urb->transfer_buffer = kmalloc (len, GFP_KERNEL);
309 if (urb->transfer_buffer == NULL) {
310 err (__FUNCTION__" - out of memory");
311 return -ENOMEM;
312 }
313 }
314 if (urb->transfer_buffer_length < len) {
315 kfree (urb->transfer_buffer);
316 urb->transfer_buffer = kmalloc (len, GFP_KERNEL);
317 if (urb->transfer_buffer == NULL) {
318 err (__FUNCTION__" - out of memory");
319 return -ENOMEM;
320 }
321 }
322 memcpy (urb->transfer_buffer, buf, len);
323
324 dr->requesttype = BLUETOOTH_CONTROL_REQUEST_TYPE;
325 dr->request = request;
326 dr->value = cpu_to_le16p(&value);
327 dr->index = cpu_to_le16p(&bluetooth->control_out_bInterfaceNum);
328 dr->length = cpu_to_le16p(&len);
329
330 FILL_CONTROL_URB (urb, bluetooth->dev, usb_sndctrlpipe(bluetooth->dev, 0),
331 (unsigned char*)dr, urb->transfer_buffer, len, bluetooth_ctrl_callback, bluetooth);
332
333 /* send it down the pipe */
334 status = usb_submit_urb(urb);
335 if (status)
336 dbg(__FUNCTION__ " - usb_submit_urb(control) failed with status = %d", status);
337
338 return status;
339 }
340
341
342
343
344
345 /*****************************************************************************
346 * Driver tty interface functions
347 *****************************************************************************/
348 static int bluetooth_open (struct tty_struct *tty, struct file * filp)
349 {
350 struct usb_bluetooth *bluetooth;
351 int result;
352
353 dbg(__FUNCTION__);
354
355 /* initialize the pointer incase something fails */
356 tty->driver_data = NULL;
357
358 /* get the bluetooth object associated with this tty pointer */
359 bluetooth = get_bluetooth_by_minor (MINOR(tty->device));
360
361 if (bluetooth_paranoia_check (bluetooth, __FUNCTION__)) {
362 return -ENODEV;
363 }
364
365 if (bluetooth->active) {
366 dbg (__FUNCTION__ " - device already open");
367 return -EINVAL;
368 }
369
370 /* set up our structure making the tty driver remember our object, and us it */
371 tty->driver_data = bluetooth;
372 bluetooth->tty = tty;
373
374 /* force low_latency on so that our tty_push actually forces the data through,
375 * otherwise it is scheduled, and with high data rates (like with OHCI) data
376 * can get lost. */
377 bluetooth->tty->low_latency = 1;
378
379 bluetooth->active = 1;
380
381 /* Reset the packet position counters */
382 bluetooth->int_packet_pos = 0;
383 bluetooth->bulk_packet_pos = 0;
384
385 #ifndef BTBUGGYHARDWARE
386 /* Start reading from the device */
387 FILL_BULK_URB(bluetooth->read_urb, bluetooth->dev,
388 usb_rcvbulkpipe(bluetooth->dev, bluetooth->bulk_in_endpointAddress),
389 bluetooth->bulk_in_buffer, bluetooth->bulk_in_buffer_size,
390 bluetooth_read_bulk_callback, bluetooth);
391 result = usb_submit_urb(bluetooth->read_urb);
392 if (result)
393 dbg(__FUNCTION__ " - usb_submit_urb(read bulk) failed with status %d", result);
394 #endif
395 FILL_INT_URB(bluetooth->interrupt_in_urb, bluetooth->dev,
396 usb_rcvintpipe(bluetooth->dev, bluetooth->interrupt_in_endpointAddress),
397 bluetooth->interrupt_in_buffer, bluetooth->interrupt_in_buffer_size,
398 bluetooth_int_callback, bluetooth, bluetooth->interrupt_in_interval);
399 result = usb_submit_urb(bluetooth->interrupt_in_urb);
400 if (result)
401 dbg(__FUNCTION__ " - usb_submit_urb(interrupt in) failed with status %d", result);
402
403 return 0;
404 }
405
406
407 static void bluetooth_close (struct tty_struct *tty, struct file * filp)
408 {
409 struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
410 int i;
411
412 if (!bluetooth) {
413 return;
414 }
415
416 dbg(__FUNCTION__);
417
418 if (!bluetooth->active) {
419 dbg (__FUNCTION__ " - device not opened");
420 return;
421 }
422
423 /* shutdown any bulk reads and writes that might be going on */
424 for (i = 0; i < NUM_BULK_URBS; ++i)
425 usb_unlink_urb (bluetooth->write_urb_pool[i]);
426 usb_unlink_urb (bluetooth->read_urb);
427 usb_unlink_urb (bluetooth->interrupt_in_urb);
428
429 bluetooth->active = 0;
430 }
431
432
433 static int bluetooth_write (struct tty_struct * tty, int from_user, const unsigned char *buf, int count)
434 {
435 struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
436 struct urb *urb = NULL;
437 unsigned char *temp_buffer = NULL;
438 const unsigned char *current_buffer;
439 const unsigned char *current_position;
440 int bytes_sent;
441 int buffer_size;
442 int i;
443 int retval = 0;
444
445 if (!bluetooth) {
446 return -ENODEV;
447 }
448
449 dbg(__FUNCTION__ " - %d byte(s)", count);
450
451 if (!bluetooth->active) {
452 dbg (__FUNCTION__ " - device not opened");
453 return -EINVAL;
454 }
455
456 if (count == 0) {
457 dbg(__FUNCTION__ " - write request of 0 bytes");
458 return 0;
459 }
460 if (count == 1) {
461 dbg(__FUNCTION__ " - write request only included type %d", buf[0]);
462 return 1;
463 }
464
465 #ifdef DEBUG
466 printk (KERN_DEBUG __FILE__ ": " __FUNCTION__ " - length = %d, data = ", count);
467 for (i = 0; i < count; ++i) {
468 printk ("%.2x ", buf[i]);
469 }
470 printk ("\n");
471 #endif
472
473 if (from_user) {
474 temp_buffer = kmalloc (count, GFP_KERNEL);
475 if (temp_buffer == NULL) {
476 err (__FUNCTION__ "- out of memory.");
477 retval = -ENOMEM;
478 goto exit;
479 }
480 copy_from_user (temp_buffer, buf, count);
481 current_buffer = temp_buffer;
482 } else {
483 current_buffer = buf;
484 }
485
486 switch (*current_buffer) {
487 /* First byte indicates the type of packet */
488 case CMD_PKT:
489 /* dbg(__FUNCTION__ "- Send cmd_pkt len:%d", count);*/
490
491 retval = bluetooth_ctrl_msg (bluetooth, 0x00, 0x00, ¤t_buffer[1], count-1);
492 if (retval) {
493 goto exit;
494 }
495 retval = count;
496 break;
497
498 case ACL_PKT:
499 current_position = current_buffer;
500 ++current_position;
501 --count;
502 bytes_sent = 0;
503
504 while (count > 0) {
505 urb = NULL;
506
507 /* try to find a free urb in our list */
508 for (i = 0; i < NUM_BULK_URBS; ++i) {
509 if (bluetooth->write_urb_pool[i]->status != -EINPROGRESS) {
510 urb = bluetooth->write_urb_pool[i];
511 break;
512 }
513 }
514 if (urb == NULL) {
515 dbg (__FUNCTION__ " - no free urbs");
516 retval = bytes_sent;
517 goto exit;
518 }
519
520
521 buffer_size = MIN (count, bluetooth->bulk_out_buffer_size);
522 memcpy (urb->transfer_buffer, current_position, buffer_size);
523
524 /* build up our urb */
525 FILL_BULK_URB (urb, bluetooth->dev, usb_sndbulkpipe(bluetooth->dev, bluetooth->bulk_out_endpointAddress),
526 urb->transfer_buffer, buffer_size, bluetooth_write_bulk_callback, bluetooth);
527 urb->transfer_flags |= USB_QUEUE_BULK;
528
529 /* send it down the pipe */
530 retval = usb_submit_urb(urb);
531 if (retval) {
532 dbg(__FUNCTION__ " - usb_submit_urb(write bulk) failed with error = %d", retval);
533 goto exit;
534 }
535 #ifdef BTBUGGYHARDWARE
536 /* A workaround for the stalled data bug */
537 /* May or may not be needed...*/
538 if (count != 0) {
539 udelay(500);
540 }
541 #endif
542 current_position += buffer_size;
543 bytes_sent += buffer_size;
544 count -= buffer_size;
545 }
546
547 retval = bytes_sent + 1;
548 break;
549
550 default :
551 dbg(__FUNCTION__" - unsupported (at this time) write type");
552 retval = -EINVAL;
553 break;
554 }
555
556 exit:
557 if (temp_buffer != NULL)
558 kfree (temp_buffer);
559
560 return retval;
561 }
562
563
564 static int bluetooth_write_room (struct tty_struct *tty)
565 {
566 struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
567 int room = 0;
568 int i;
569
570 if (!bluetooth) {
571 return -ENODEV;
572 }
573
574 dbg(__FUNCTION__);
575
576 if (!bluetooth->active) {
577 dbg (__FUNCTION__ " - device not open");
578 return -EINVAL;
579 }
580
581 for (i = 0; i < NUM_BULK_URBS; ++i) {
582 if (bluetooth->write_urb_pool[i]->status != -EINPROGRESS) {
583 room += bluetooth->bulk_out_buffer_size;
584 }
585 }
586
587 dbg(__FUNCTION__ " - returns %d", room);
588 return room;
589 }
590
591
592 static int bluetooth_chars_in_buffer (struct tty_struct *tty)
593 {
594 struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
595 int chars = 0;
596 int i;
597
598 if (!bluetooth) {
599 return -ENODEV;
600 }
601
602 if (!bluetooth->active) {
603 dbg (__FUNCTION__ " - device not open");
604 return -EINVAL;
605 }
606
607 for (i = 0; i < NUM_BULK_URBS; ++i) {
608 if (bluetooth->write_urb_pool[i]->status == -EINPROGRESS) {
609 chars += bluetooth->write_urb_pool[i]->transfer_buffer_length;
610 }
611 }
612
613 dbg (__FUNCTION__ " - returns %d", chars);
614 return chars;
615 }
616
617
618 static void bluetooth_throttle (struct tty_struct * tty)
619 {
620 struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
621
622 if (!bluetooth) {
623 return;
624 }
625
626 dbg(__FUNCTION__);
627
628 if (!bluetooth->active) {
629 dbg (__FUNCTION__ " - device not open");
630 return;
631 }
632
633 dbg(__FUNCTION__ " unsupported (at this time)");
634
635 return;
636 }
637
638
639 static void bluetooth_unthrottle (struct tty_struct * tty)
640 {
641 struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
642
643 if (!bluetooth) {
644 return;
645 }
646
647 dbg(__FUNCTION__);
648
649 if (!bluetooth->active) {
650 dbg (__FUNCTION__ " - device not open");
651 return;
652 }
653
654 dbg(__FUNCTION__ " unsupported (at this time)");
655 }
656
657
658 static int bluetooth_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg)
659 {
660 struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
661
662 if (!bluetooth) {
663 return -ENODEV;
664 }
665
666 dbg(__FUNCTION__ " - cmd 0x%.4x", cmd);
667
668 if (!bluetooth->active) {
669 dbg (__FUNCTION__ " - device not open");
670 return -ENODEV;
671 }
672
673 /* FIXME!!! */
674 return -ENOIOCTLCMD;
675 }
676
677
678 static void bluetooth_set_termios (struct tty_struct *tty, struct termios * old)
679 {
680 struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
681
682 if (!bluetooth) {
683 return;
684 }
685
686 dbg(__FUNCTION__);
687
688 if (!bluetooth->active) {
689 dbg (__FUNCTION__ " - device not open");
690 return;
691 }
692
693 /* FIXME!!! */
694
695 return;
696 }
697
698
699 #ifdef BTBUGGYHARDWARE
700 void btusb_enable_bulk_read(struct tty_struct *tty){
701 struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
702 int result;
703
704 if (!bluetooth) {
705 return;
706 }
707
708 dbg(__FUNCTION__);
709
710 if (!bluetooth->active) {
711 dbg (__FUNCTION__ " - device not open");
712 return;
713 }
714
715 if (bluetooth->read_urb) {
716 FILL_BULK_URB(bluetooth->read_urb, bluetooth->dev,
717 usb_rcvbulkpipe(bluetooth->dev, bluetooth->bulk_in_endpointAddress),
718 bluetooth->bulk_in_buffer, bluetooth->bulk_in_buffer_size,
719 bluetooth_read_bulk_callback, bluetooth);
720 result = usb_submit_urb(bluetooth->read_urb);
721 if (result)
722 err (__FUNCTION__ " - failed submitting read urb, error %d", result);
723 }
724 }
725
726 void btusb_disable_bulk_read(struct tty_struct *tty){
727 struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
728
729 if (!bluetooth) {
730 return;
731 }
732
733 dbg(__FUNCTION__);
734
735 if (!bluetooth->active) {
736 dbg (__FUNCTION__ " - device not open");
737 return;
738 }
739
740 if ((bluetooth->read_urb) && (bluetooth->read_urb->actual_length))
741 usb_unlink_urb(bluetooth->read_urb);
742 }
743 #endif
744
745
746 /*****************************************************************************
747 * urb callback functions
748 *****************************************************************************/
749
750
751 static void bluetooth_int_callback (struct urb *urb)
752 {
753 struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)urb->context, __FUNCTION__);
754 unsigned char *data = urb->transfer_buffer;
755 unsigned int i;
756 unsigned int count = urb->actual_length;
757 unsigned int packet_size;
758
759 dbg(__FUNCTION__);
760
761 if (!bluetooth) {
762 dbg(__FUNCTION__ " - bad bluetooth pointer, exiting");
763 return;
764 }
765
766 if (urb->status) {
767 dbg(__FUNCTION__ " - nonzero int status received: %d", urb->status);
768 return;
769 }
770
771 if (!count) {
772 dbg(__FUNCTION__ " - zero length int");
773 return;
774 }
775
776
777 #ifdef DEBUG
778 if (count) {
779 printk (KERN_DEBUG __FILE__ ": " __FUNCTION__ "- length = %d, data = ", count);
780 for (i = 0; i < count; ++i) {
781 printk ("%.2x ", data[i]);
782 }
783 printk ("\n");
784 }
785 #endif
786
787 #ifdef BTBUGGYHARDWARE
788 if ((count >= 2) && (data[0] == 0xFF) && (data[1] == 0x00)) {
789 data += 2;
790 count -= 2;
791 }
792 if (count == 0) {
793 urb->actual_length = 0;
794 return;
795 }
796 #endif
797 /* We add a packet type identifier to the beginning of each
798 HCI frame. This makes the data in the tty look like a
799 serial USB devices. Each HCI frame can be broken across
800 multiple URBs so we buffer them until we have a full hci
801 packet */
802
803 if (!bluetooth->int_packet_pos) {
804 bluetooth->int_buffer[0] = EVENT_PKT;
805 bluetooth->int_packet_pos++;
806 }
807
808 if (bluetooth->int_packet_pos + count > EVENT_BUFFER_SIZE) {
809 err(__FUNCTION__ " - exceeded EVENT_BUFFER_SIZE");
810 bluetooth->int_packet_pos = 0;
811 return;
812 }
813
814 memcpy (&bluetooth->int_buffer[bluetooth->int_packet_pos],
815 urb->transfer_buffer, count);
816 bluetooth->int_packet_pos += count;
817 urb->actual_length = 0;
818
819 if (bluetooth->int_packet_pos >= EVENT_HDR_SIZE)
820 packet_size = bluetooth->int_buffer[2];
821 else
822 return;
823
824 if (packet_size + EVENT_HDR_SIZE < bluetooth->int_packet_pos) {
825 err(__FUNCTION__ " - packet was too long");
826 bluetooth->int_packet_pos = 0;
827 return;
828 }
829
830 if (packet_size + EVENT_HDR_SIZE == bluetooth->int_packet_pos) {
831 for (i = 0; i < bluetooth->int_packet_pos; ++i) {
832 /* if we insert more than TTY_FLIPBUF_SIZE characters, we drop them */
833 if (bluetooth->tty->flip.count >= TTY_FLIPBUF_SIZE) {
834 tty_flip_buffer_push(bluetooth->tty);
835 }
836 tty_insert_flip_char(bluetooth->tty, bluetooth->int_buffer[i], 0);
837 }
838 tty_flip_buffer_push(bluetooth->tty);
839
840 bluetooth->int_packet_pos = 0;
841 }
842 }
843
844
845 static void bluetooth_ctrl_callback (struct urb *urb)
846 {
847 struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)urb->context, __FUNCTION__);
848
849 dbg(__FUNCTION__);
850
851 if (!bluetooth) {
852 dbg(__FUNCTION__ " - bad bluetooth pointer, exiting");
853 return;
854 }
855
856 if (urb->status) {
857 dbg(__FUNCTION__ " - nonzero read bulk status received: %d", urb->status);
858 return;
859 }
860 }
861
862
863 static void bluetooth_read_bulk_callback (struct urb *urb)
864 {
865 struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)urb->context, __FUNCTION__);
866 unsigned char *data = urb->transfer_buffer;
867 unsigned int count = urb->actual_length;
868 unsigned int i;
869 unsigned int packet_size;
870 int result;
871
872
873 dbg(__FUNCTION__);
874
875 if (!bluetooth) {
876 dbg(__FUNCTION__ " - bad bluetooth pointer, exiting");
877 return;
878 }
879
880 if (urb->status) {
881 dbg(__FUNCTION__ " - nonzero read bulk status received: %d", urb->status);
882 if (urb->status == -ENOENT) {
883 dbg(__FUNCTION__ " - URB canceled, won't reschedule");
884 return;
885 }
886 goto exit;
887 }
888
889 if (!count) {
890 dbg(__FUNCTION__ " - zero length read bulk");
891 goto exit;
892 }
893
894 #ifdef DEBUG
895 if (count) {
896 printk (KERN_DEBUG __FILE__ ": " __FUNCTION__ "- length = %d, data = ", count);
897 for (i = 0; i < count; ++i) {
898 printk ("%.2x ", data[i]);
899 }
900 printk ("\n");
901 }
902 #endif
903 #ifdef BTBUGGYHARDWARE
904 if ((count == 4) && (data[0] == 0x00) && (data[1] == 0x00)
905 && (data[2] == 0x00) && (data[3] == 0x00)) {
906 urb->actual_length = 0;
907 FILL_BULK_URB(bluetooth->read_urb, bluetooth->dev,
908 usb_rcvbulkpipe(bluetooth->dev, bluetooth->bulk_in_endpointAddress),
909 bluetooth->bulk_in_buffer, bluetooth->bulk_in_buffer_size,
910 bluetooth_read_bulk_callback, bluetooth);
911 result = usb_submit_urb(bluetooth->read_urb);
912 if (result)
913 err (__FUNCTION__ " - failed resubmitting read urb, error %d", result);
914
915 return;
916 }
917 #endif
918 /* We add a packet type identifier to the beginning of each
919 HCI frame. This makes the data in the tty look like a
920 serial USB devices. Each HCI frame can be broken across
921 multiple URBs so we buffer them until we have a full hci
922 packet */
923
924 if (!bluetooth->bulk_packet_pos) {
925 bluetooth->bulk_buffer[0] = ACL_PKT;
926 bluetooth->bulk_packet_pos++;
927 }
928
929 if (bluetooth->bulk_packet_pos + count > ACL_BUFFER_SIZE) {
930 err(__FUNCTION__ " - exceeded ACL_BUFFER_SIZE");
931 bluetooth->bulk_packet_pos = 0;
932 goto exit;
933 }
934
935 memcpy (&bluetooth->bulk_buffer[bluetooth->bulk_packet_pos],
936 urb->transfer_buffer, count);
937 bluetooth->bulk_packet_pos += count;
938 urb->actual_length = 0;
939
940 if (bluetooth->bulk_packet_pos >= ACL_HDR_SIZE) {
941 packet_size = CHAR2INT16(bluetooth->bulk_buffer[4],bluetooth->bulk_buffer[3]);
942 } else {
943 goto exit;
944 }
945
946 if (packet_size + ACL_HDR_SIZE < bluetooth->bulk_packet_pos) {
947 err(__FUNCTION__ " - packet was too long");
948 bluetooth->bulk_packet_pos = 0;
949 goto exit;
950 }
951
952 if (packet_size + ACL_HDR_SIZE == bluetooth->bulk_packet_pos) {
953 for (i = 0; i < bluetooth->bulk_packet_pos; ++i) {
954 /* if we insert more than TTY_FLIPBUF_SIZE characters, we drop them. */
955 if (bluetooth->tty->flip.count >= TTY_FLIPBUF_SIZE) {
956 tty_flip_buffer_push(bluetooth->tty);
957 }
958 tty_insert_flip_char(bluetooth->tty, bluetooth->bulk_buffer[i], 0);
959 }
960 tty_flip_buffer_push(bluetooth->tty);
961 bluetooth->bulk_packet_pos = 0;
962 }
963
964 exit:
965 if (!bluetooth || !bluetooth->active)
966 return;
967
968 FILL_BULK_URB(bluetooth->read_urb, bluetooth->dev,
969 usb_rcvbulkpipe(bluetooth->dev, bluetooth->bulk_in_endpointAddress),
970 bluetooth->bulk_in_buffer, bluetooth->bulk_in_buffer_size,
971 bluetooth_read_bulk_callback, bluetooth);
972 result = usb_submit_urb(bluetooth->read_urb);
973 if (result)
974 err (__FUNCTION__ " - failed resubmitting read urb, error %d", result);
975
976 return;
977 }
978
979
980 static void bluetooth_write_bulk_callback (struct urb *urb)
981 {
982 struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)urb->context, __FUNCTION__);
983
984 dbg(__FUNCTION__);
985
986 if (!bluetooth) {
987 dbg(__FUNCTION__ " - bad bluetooth pointer, exiting");
988 return;
989 }
990
991 if (urb->status) {
992 dbg(__FUNCTION__ " - nonzero write bulk status received: %d", urb->status);
993 return;
994 }
995
996 /* wake up our little function to let the tty layer know that something happened */
997 queue_task(&bluetooth->tqueue, &tq_immediate);
998 mark_bh(IMMEDIATE_BH);
999 return;
1000 }
1001
1002
1003 static void bluetooth_softint(void *private)
1004 {
1005 struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)private, __FUNCTION__);
1006 struct tty_struct *tty;
1007
1008 dbg(__FUNCTION__);
1009
1010 if (!bluetooth) {
1011 return;
1012 }
1013
1014 tty = bluetooth->tty;
1015 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) {
1016 dbg(__FUNCTION__ " - write wakeup call.");
1017 (tty->ldisc.write_wakeup)(tty);
1018 }
1019
1020 wake_up_interruptible(&tty->write_wait);
1021 }
1022
1023
1024 static void * usb_bluetooth_probe(struct usb_device *dev, unsigned int ifnum,
1025 const struct usb_device_id *id)
1026 {
1027 struct usb_bluetooth *bluetooth = NULL;
1028 struct usb_interface_descriptor *interface;
1029 struct usb_endpoint_descriptor *endpoint;
1030 struct usb_endpoint_descriptor *interrupt_in_endpoint[8];
1031 struct usb_endpoint_descriptor *bulk_in_endpoint[8];
1032 struct usb_endpoint_descriptor *bulk_out_endpoint[8];
1033 int control_out_endpoint;
1034
1035 int minor;
1036 int buffer_size;
1037 int i;
1038 int num_interrupt_in = 0;
1039 int num_bulk_in = 0;
1040 int num_bulk_out = 0;
1041
1042 interface = &dev->actconfig->interface[ifnum].altsetting[0];
1043 control_out_endpoint = interface->bInterfaceNumber;
1044
1045 /* find the endpoints that we need */
1046 for (i = 0; i < interface->bNumEndpoints; ++i) {
1047 endpoint = &interface->endpoint[i];
1048
1049 if ((endpoint->bEndpointAddress & 0x80) &&
1050 ((endpoint->bmAttributes & 3) == 0x02)) {
1051 /* we found a bulk in endpoint */
1052 dbg("found bulk in");
1053 bulk_in_endpoint[num_bulk_in] = endpoint;
1054 ++num_bulk_in;
1055 }
1056
1057 if (((endpoint->bEndpointAddress & 0x80) == 0x00) &&
1058 ((endpoint->bmAttributes & 3) == 0x02)) {
1059 /* we found a bulk out endpoint */
1060 dbg("found bulk out");
1061 bulk_out_endpoint[num_bulk_out] = endpoint;
1062 ++num_bulk_out;
1063 }
1064
1065 if ((endpoint->bEndpointAddress & 0x80) &&
1066 ((endpoint->bmAttributes & 3) == 0x03)) {
1067 /* we found a interrupt in endpoint */
1068 dbg("found interrupt in");
1069 interrupt_in_endpoint[num_interrupt_in] = endpoint;
1070 ++num_interrupt_in;
1071 }
1072 }
1073
1074 /* according to the spec, we can only have 1 bulk_in, 1 bulk_out, and 1 interrupt_in endpoints */
1075 if ((num_bulk_in != 1) ||
1076 (num_bulk_out != 1) ||
1077 (num_interrupt_in != 1)) {
1078 dbg (__FUNCTION__ " - improper number of endpoints. Bluetooth driver not bound.");
1079 return NULL;
1080 }
1081
1082 MOD_INC_USE_COUNT;
1083 info("USB Bluetooth converter detected");
1084
1085 for (minor = 0; minor < BLUETOOTH_TTY_MINORS && bluetooth_table[minor]; ++minor)
1086 ;
1087 if (bluetooth_table[minor]) {
1088 err("No more free Bluetooth devices");
1089 MOD_DEC_USE_COUNT;
1090 return NULL;
1091 }
1092
1093 if (!(bluetooth = kmalloc(sizeof(struct usb_bluetooth), GFP_KERNEL))) {
1094 err("Out of memory");
1095 MOD_DEC_USE_COUNT;
1096 return NULL;
1097 }
1098
1099 memset(bluetooth, 0, sizeof(struct usb_bluetooth));
1100
1101 bluetooth->magic = USB_BLUETOOTH_MAGIC;
1102 bluetooth->dev = dev;
1103 bluetooth->minor = minor;
1104 bluetooth->tqueue.routine = bluetooth_softint;
1105 bluetooth->tqueue.data = bluetooth;
1106
1107 /* record the interface number for the control out */
1108 bluetooth->control_out_bInterfaceNum = control_out_endpoint;
1109
1110 /* create our control out urb pool */
1111 for (i = 0; i < NUM_CONTROL_URBS; ++i) {
1112 struct urb *urb = usb_alloc_urb(0);
1113 if (urb == NULL) {
1114 err("No free urbs available");
1115 goto probe_error;
1116 }
1117 urb->transfer_buffer = NULL;
1118 bluetooth->control_urb_pool[i] = urb;
1119 }
1120
1121 /* set up the endpoint information */
1122 endpoint = bulk_in_endpoint[0];
1123 bluetooth->read_urb = usb_alloc_urb (0);
1124 if (!bluetooth->read_urb) {
1125 err("No free urbs available");
1126 goto probe_error;
1127 }
1128 bluetooth->bulk_in_buffer_size = buffer_size = endpoint->wMaxPacketSize;
1129 bluetooth->bulk_in_endpointAddress = endpoint->bEndpointAddress;
1130 bluetooth->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
1131 if (!bluetooth->bulk_in_buffer) {
1132 err("Couldn't allocate bulk_in_buffer");
1133 goto probe_error;
1134 }
1135 FILL_BULK_URB(bluetooth->read_urb, dev, usb_rcvbulkpipe(dev, endpoint->bEndpointAddress),
1136 bluetooth->bulk_in_buffer, buffer_size, bluetooth_read_bulk_callback, bluetooth);
1137
1138 endpoint = bulk_out_endpoint[0];
1139 bluetooth->bulk_out_endpointAddress = endpoint->bEndpointAddress;
1140
1141 /* create our write urb pool */
1142 for (i = 0; i < NUM_BULK_URBS; ++i) {
1143 struct urb *urb = usb_alloc_urb(0);
1144 if (urb == NULL) {
1145 err("No free urbs available");
1146 goto probe_error;
1147 }
1148 urb->transfer_buffer = kmalloc (bluetooth->bulk_out_buffer_size, GFP_KERNEL);
1149 if (urb->transfer_buffer == NULL) {
1150 err("out of memory");
1151 goto probe_error;
1152 }
1153 bluetooth->write_urb_pool[i] = urb;
1154 }
1155
1156 bluetooth->bulk_out_buffer_size = endpoint->wMaxPacketSize * 2;
1157
1158 endpoint = interrupt_in_endpoint[0];
1159 bluetooth->interrupt_in_urb = usb_alloc_urb(0);
1160 if (!bluetooth->interrupt_in_urb) {
1161 err("No free urbs available");
1162 goto probe_error;
1163 }
1164 bluetooth->interrupt_in_buffer_size = buffer_size = endpoint->wMaxPacketSize;
1165 bluetooth->interrupt_in_endpointAddress = endpoint->bEndpointAddress;
1166 bluetooth->interrupt_in_interval = endpoint->bInterval;
1167 bluetooth->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
1168 if (!bluetooth->interrupt_in_buffer) {
1169 err("Couldn't allocate interrupt_in_buffer");
1170 goto probe_error;
1171 }
1172 FILL_INT_URB(bluetooth->interrupt_in_urb, dev, usb_rcvintpipe(dev, endpoint->bEndpointAddress),
1173 bluetooth->interrupt_in_buffer, buffer_size, bluetooth_int_callback,
1174 bluetooth, endpoint->bInterval);
1175
1176 /* initialize the devfs nodes for this device and let the user know what bluetooths we are bound to */
1177 tty_register_devfs (&bluetooth_tty_driver, 0, minor);
1178 info("Bluetooth converter now attached to ttyUB%d (or usb/ttub/%d for devfs)", minor, minor);
1179
1180 bluetooth_table[minor] = bluetooth;
1181
1182 return bluetooth; /* success */
1183
1184 probe_error:
1185 if (bluetooth->read_urb)
1186 usb_free_urb (bluetooth->read_urb);
1187 if (bluetooth->bulk_in_buffer)
1188 kfree (bluetooth->bulk_in_buffer);
1189 if (bluetooth->interrupt_in_urb)
1190 usb_free_urb (bluetooth->interrupt_in_urb);
1191 if (bluetooth->interrupt_in_buffer)
1192 kfree (bluetooth->interrupt_in_buffer);
1193 for (i = 0; i < NUM_BULK_URBS; ++i)
1194 if (bluetooth->write_urb_pool[i]) {
1195 if (bluetooth->write_urb_pool[i]->transfer_buffer)
1196 kfree (bluetooth->write_urb_pool[i]->transfer_buffer);
1197 usb_free_urb (bluetooth->write_urb_pool[i]);
1198 }
1199 for (i = 0; i < NUM_CONTROL_URBS; ++i)
1200 if (bluetooth->control_urb_pool[i]) {
1201 if (bluetooth->control_urb_pool[i]->transfer_buffer)
1202 kfree (bluetooth->control_urb_pool[i]->transfer_buffer);
1203 usb_free_urb (bluetooth->control_urb_pool[i]);
1204 }
1205
1206 bluetooth_table[minor] = NULL;
1207
1208 /* free up any memory that we allocated */
1209 kfree (bluetooth);
1210 MOD_DEC_USE_COUNT;
1211 return NULL;
1212 }
1213
1214
1215 static void usb_bluetooth_disconnect(struct usb_device *dev, void *ptr)
1216 {
1217 struct usb_bluetooth *bluetooth = (struct usb_bluetooth *) ptr;
1218 int i;
1219
1220 if (bluetooth) {
1221 if ((bluetooth->active) && (bluetooth->tty))
1222 tty_hangup(bluetooth->tty);
1223
1224 bluetooth->active = 0;
1225
1226 if (bluetooth->read_urb) {
1227 usb_unlink_urb (bluetooth->read_urb);
1228 usb_free_urb (bluetooth->read_urb);
1229 }
1230 if (bluetooth->bulk_in_buffer)
1231 kfree (bluetooth->bulk_in_buffer);
1232
1233 if (bluetooth->interrupt_in_urb) {
1234 usb_unlink_urb (bluetooth->interrupt_in_urb);
1235 usb_free_urb (bluetooth->interrupt_in_urb);
1236 }
1237 if (bluetooth->interrupt_in_buffer)
1238 kfree (bluetooth->interrupt_in_buffer);
1239
1240 tty_unregister_devfs (&bluetooth_tty_driver, bluetooth->minor);
1241
1242 for (i = 0; i < NUM_BULK_URBS; ++i) {
1243 if (bluetooth->write_urb_pool[i]) {
1244 usb_unlink_urb (bluetooth->write_urb_pool[i]);
1245 if (bluetooth->write_urb_pool[i]->transfer_buffer)
1246 kfree (bluetooth->write_urb_pool[i]->transfer_buffer);
1247 usb_free_urb (bluetooth->write_urb_pool[i]);
1248 }
1249 }
1250 for (i = 0; i < NUM_CONTROL_URBS; ++i) {
1251 if (bluetooth->control_urb_pool[i]) {
1252 usb_unlink_urb (bluetooth->control_urb_pool[i]);
1253 if (bluetooth->control_urb_pool[i]->transfer_buffer)
1254 kfree (bluetooth->control_urb_pool[i]->transfer_buffer);
1255 usb_free_urb (bluetooth->control_urb_pool[i]);
1256 }
1257 }
1258
1259 info("Bluetooth converter now disconnected from ttyUB%d", bluetooth->minor);
1260
1261 bluetooth_table[bluetooth->minor] = NULL;
1262
1263 /* free up any memory that we allocated */
1264 kfree (bluetooth);
1265
1266 } else {
1267 info("device disconnected");
1268 }
1269
1270 MOD_DEC_USE_COUNT;
1271 }
1272
1273
1274 static struct tty_driver bluetooth_tty_driver = {
1275 magic: TTY_DRIVER_MAGIC,
1276 driver_name: "usb-bluetooth",
1277 name: "usb/ttub/%d",
1278 major: BLUETOOTH_TTY_MAJOR,
1279 minor_start: 0,
1280 num: BLUETOOTH_TTY_MINORS,
1281 type: TTY_DRIVER_TYPE_SERIAL,
1282 subtype: SERIAL_TYPE_NORMAL,
1283 flags: TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS,
1284
1285 refcount: &bluetooth_refcount,
1286 table: bluetooth_tty,
1287 termios: bluetooth_termios,
1288 termios_locked: bluetooth_termios_locked,
1289
1290 open: bluetooth_open,
1291 close: bluetooth_close,
1292 write: bluetooth_write,
1293 write_room: bluetooth_write_room,
1294 ioctl: bluetooth_ioctl,
1295 set_termios: bluetooth_set_termios,
1296 throttle: bluetooth_throttle,
1297 unthrottle: bluetooth_unthrottle,
1298 chars_in_buffer: bluetooth_chars_in_buffer,
1299 };
1300
1301
1302 int usb_bluetooth_init(void)
1303 {
1304 int i;
1305 int result;
1306
1307 /* Initalize our global data */
1308 for (i = 0; i < BLUETOOTH_TTY_MINORS; ++i) {
1309 bluetooth_table[i] = NULL;
1310 }
1311
1312 info ("USB Bluetooth support registered");
1313
1314 /* register the tty driver */
1315 bluetooth_tty_driver.init_termios = tty_std_termios;
1316 bluetooth_tty_driver.init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1317 if (tty_register_driver (&bluetooth_tty_driver)) {
1318 err(__FUNCTION__ " - failed to register tty driver");
1319 return -1;
1320 }
1321
1322 /* register the USB driver */
1323 result = usb_register(&usb_bluetooth_driver);
1324 if (result < 0) {
1325 tty_unregister_driver(&bluetooth_tty_driver);
1326 err("usb_register failed for the USB bluetooth driver. Error number %d", result);
1327 return -1;
1328 }
1329
1330 info(DRIVER_DESC " " DRIVER_VERSION);
1331
1332 return 0;
1333 }
1334
1335
1336 void usb_bluetooth_exit(void)
1337 {
1338 usb_deregister(&usb_bluetooth_driver);
1339 tty_unregister_driver(&bluetooth_tty_driver);
1340 }
1341
1342
1343 module_init(usb_bluetooth_init);
1344 module_exit(usb_bluetooth_exit);
1345
1346 /* Module information */
1347 MODULE_AUTHOR( DRIVER_AUTHOR );
1348 MODULE_DESCRIPTION( DRIVER_DESC );
1349
1350
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