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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 *
Marcel Holtmann0372a662005-10-28 19:20:45 +02003 * Bluetooth HCI UART driver
4 *
5 * Copyright (C) 2000-2001 Qualcomm Incorporated
6 * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com>
7 * Copyright (C) 2004-2005 Marcel Holtmann <marcel@holtmann.org>
8 *
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/module.h>
27
28#include <linux/kernel.h>
29#include <linux/init.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <linux/types.h>
31#include <linux/fcntl.h>
32#include <linux/interrupt.h>
33#include <linux/ptrace.h>
34#include <linux/poll.h>
35
36#include <linux/slab.h>
37#include <linux/tty.h>
38#include <linux/errno.h>
39#include <linux/string.h>
40#include <linux/signal.h>
41#include <linux/ioctl.h>
42#include <linux/skbuff.h>
43
44#include <net/bluetooth/bluetooth.h>
45#include <net/bluetooth/hci_core.h>
46
47#include "hci_uart.h"
48
Marcel Holtmann0372a662005-10-28 19:20:45 +020049#define VERSION "2.2"
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051static int reset = 0;
52
53static struct hci_uart_proto *hup[HCI_UART_MAX_PROTO];
54
55int hci_uart_register_proto(struct hci_uart_proto *p)
56{
57 if (p->id >= HCI_UART_MAX_PROTO)
58 return -EINVAL;
59
60 if (hup[p->id])
61 return -EEXIST;
62
63 hup[p->id] = p;
Marcel Holtmann0372a662005-10-28 19:20:45 +020064
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 return 0;
66}
67
68int hci_uart_unregister_proto(struct hci_uart_proto *p)
69{
70 if (p->id >= HCI_UART_MAX_PROTO)
71 return -EINVAL;
72
73 if (!hup[p->id])
74 return -EINVAL;
75
76 hup[p->id] = NULL;
Marcel Holtmann0372a662005-10-28 19:20:45 +020077
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 return 0;
79}
80
81static struct hci_uart_proto *hci_uart_get_proto(unsigned int id)
82{
83 if (id >= HCI_UART_MAX_PROTO)
84 return NULL;
Marcel Holtmann0372a662005-10-28 19:20:45 +020085
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 return hup[id];
87}
88
89static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type)
90{
91 struct hci_dev *hdev = hu->hdev;
Marcel Holtmann0372a662005-10-28 19:20:45 +020092
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 /* Update HCI stat counters */
94 switch (pkt_type) {
95 case HCI_COMMAND_PKT:
96 hdev->stat.cmd_tx++;
97 break;
98
99 case HCI_ACLDATA_PKT:
100 hdev->stat.acl_tx++;
101 break;
102
103 case HCI_SCODATA_PKT:
Karl Beldan7f8f2722010-10-07 21:57:10 +0200104 hdev->stat.sco_tx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 break;
106 }
107}
108
109static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu)
110{
111 struct sk_buff *skb = hu->tx_skb;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 if (!skb)
114 skb = hu->proto->dequeue(hu);
115 else
116 hu->tx_skb = NULL;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200117
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 return skb;
119}
120
121int hci_uart_tx_wakeup(struct hci_uart *hu)
122{
123 struct tty_struct *tty = hu->tty;
124 struct hci_dev *hdev = hu->hdev;
125 struct sk_buff *skb;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200126
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state)) {
128 set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state);
129 return 0;
130 }
131
132 BT_DBG("");
133
134restart:
135 clear_bit(HCI_UART_TX_WAKEUP, &hu->tx_state);
136
137 while ((skb = hci_uart_dequeue(hu))) {
138 int len;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200139
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
Alan Coxf34d7a52008-04-30 00:54:13 -0700141 len = tty->ops->write(tty, skb->data, skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 hdev->stat.byte_tx += len;
143
144 skb_pull(skb, len);
145 if (skb->len) {
146 hu->tx_skb = skb;
147 break;
148 }
Marcel Holtmann0372a662005-10-28 19:20:45 +0200149
Marcel Holtmann0d48d932005-08-09 20:30:28 -0700150 hci_uart_tx_complete(hu, bt_cb(skb)->pkt_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 kfree_skb(skb);
Marcel Holtmann0372a662005-10-28 19:20:45 +0200152 }
153
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state))
155 goto restart;
156
157 clear_bit(HCI_UART_SENDING, &hu->tx_state);
158 return 0;
159}
160
161/* ------- Interface to HCI layer ------ */
162/* Initialize device */
163static int hci_uart_open(struct hci_dev *hdev)
164{
165 BT_DBG("%s %p", hdev->name, hdev);
166
167 /* Nothing to do for UART driver */
168
169 set_bit(HCI_RUNNING, &hdev->flags);
Marcel Holtmann0372a662005-10-28 19:20:45 +0200170
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 return 0;
172}
173
174/* Reset device */
175static int hci_uart_flush(struct hci_dev *hdev)
176{
177 struct hci_uart *hu = (struct hci_uart *) hdev->driver_data;
178 struct tty_struct *tty = hu->tty;
179
180 BT_DBG("hdev %p tty %p", hdev, tty);
181
182 if (hu->tx_skb) {
183 kfree_skb(hu->tx_skb); hu->tx_skb = NULL;
184 }
185
186 /* Flush any pending characters in the driver and discipline. */
187 tty_ldisc_flush(tty);
Alan Coxf34d7a52008-04-30 00:54:13 -0700188 tty_driver_flush_buffer(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
190 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
191 hu->proto->flush(hu);
192
193 return 0;
194}
195
196/* Close device */
197static int hci_uart_close(struct hci_dev *hdev)
198{
199 BT_DBG("hdev %p", hdev);
200
201 if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
202 return 0;
203
204 hci_uart_flush(hdev);
David Newall3611f4d2008-02-11 21:41:30 -0800205 hdev->flush = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 return 0;
207}
208
209/* Send frames from HCI layer */
210static int hci_uart_send_frame(struct sk_buff *skb)
211{
212 struct hci_dev* hdev = (struct hci_dev *) skb->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 struct hci_uart *hu;
214
215 if (!hdev) {
André Goddard Rosaaf901ca2009-11-14 13:09:05 -0200216 BT_ERR("Frame for unknown device (hdev=NULL)");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 return -ENODEV;
218 }
219
220 if (!test_bit(HCI_RUNNING, &hdev->flags))
221 return -EBUSY;
222
223 hu = (struct hci_uart *) hdev->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
Marcel Holtmann0d48d932005-08-09 20:30:28 -0700225 BT_DBG("%s: type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
227 hu->proto->enqueue(hu, skb);
228
229 hci_uart_tx_wakeup(hu);
Marcel Holtmann0372a662005-10-28 19:20:45 +0200230
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 return 0;
232}
233
234static void hci_uart_destruct(struct hci_dev *hdev)
235{
Marcel Holtmann0372a662005-10-28 19:20:45 +0200236 if (!hdev)
237 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
239 BT_DBG("%s", hdev->name);
Marcel Holtmann77851622006-09-21 16:23:19 +0200240 kfree(hdev->driver_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241}
242
243/* ------ LDISC part ------ */
244/* hci_uart_tty_open
245 *
246 * Called when line discipline changed to HCI_UART.
247 *
248 * Arguments:
249 * tty pointer to tty info structure
250 * Return Value:
251 * 0 if success, otherwise error code
252 */
253static int hci_uart_tty_open(struct tty_struct *tty)
254{
255 struct hci_uart *hu = (void *) tty->disc_data;
256
257 BT_DBG("tty %p", tty);
258
Alan Coxc19483c2010-10-22 14:11:26 +0100259 /* FIXME: This btw is bogus, nothing requires the old ldisc to clear
260 the pointer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 if (hu)
262 return -EEXIST;
263
Alan Coxc19483c2010-10-22 14:11:26 +0100264 /* Error if the tty has no write op instead of leaving an exploitable
265 hole */
266 if (tty->ops->write == NULL)
267 return -EOPNOTSUPP;
268
Deepak Saxena089b1db2005-11-07 01:01:26 -0800269 if (!(hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL))) {
Marcel Holtmann77851622006-09-21 16:23:19 +0200270 BT_ERR("Can't allocate control structure");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 return -ENFILE;
272 }
Marcel Holtmann0372a662005-10-28 19:20:45 +0200273
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 tty->disc_data = hu;
275 hu->tty = tty;
Alan Cox33f0f882006-01-09 20:54:13 -0800276 tty->receive_room = 65536;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
278 spin_lock_init(&hu->rx_lock);
279
280 /* Flush any pending characters in the driver and line discipline. */
Marcel Holtmann0372a662005-10-28 19:20:45 +0200281
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 /* FIXME: why is this needed. Note don't use ldisc_ref here as the
283 open path is before the ldisc is referencable */
Marcel Holtmann0372a662005-10-28 19:20:45 +0200284
Alan Coxc65c9bc2009-06-11 12:50:12 +0100285 if (tty->ldisc->ops->flush_buffer)
286 tty->ldisc->ops->flush_buffer(tty);
Alan Coxf34d7a52008-04-30 00:54:13 -0700287 tty_driver_flush_buffer(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
289 return 0;
290}
291
292/* hci_uart_tty_close()
293 *
294 * Called when the line discipline is changed to something
295 * else, the tty is closed, or the tty detects a hangup.
296 */
297static void hci_uart_tty_close(struct tty_struct *tty)
298{
299 struct hci_uart *hu = (void *)tty->disc_data;
300
301 BT_DBG("tty %p", tty);
302
303 /* Detach from the tty */
304 tty->disc_data = NULL;
305
306 if (hu) {
307 struct hci_dev *hdev = hu->hdev;
Marcel Holtmann22ad4202007-05-09 09:15:40 +0200308
309 if (hdev)
310 hci_uart_close(hdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
312 if (test_and_clear_bit(HCI_UART_PROTO_SET, &hu->flags)) {
313 hu->proto->close(hu);
Jun Nied9319562010-12-07 14:03:38 +0800314 if (hdev) {
315 hci_unregister_dev(hdev);
316 hci_free_dev(hdev);
317 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 }
319 }
320}
321
322/* hci_uart_tty_wakeup()
323 *
324 * Callback for transmit wakeup. Called when low level
325 * device driver can accept more send data.
326 *
327 * Arguments: tty pointer to associated tty instance data
328 * Return Value: None
329 */
330static void hci_uart_tty_wakeup(struct tty_struct *tty)
331{
332 struct hci_uart *hu = (void *)tty->disc_data;
333
334 BT_DBG("");
335
336 if (!hu)
337 return;
338
339 clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
340
341 if (tty != hu->tty)
342 return;
343
344 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
345 hci_uart_tx_wakeup(hu);
346}
347
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348/* hci_uart_tty_receive()
349 *
350 * Called by tty low level driver when receive data is
351 * available.
352 *
353 * Arguments: tty pointer to tty isntance data
354 * data pointer to received data
355 * flags pointer to flags for data
356 * count count of received data in bytes
357 *
Linus Torvalds99dff582011-05-23 12:23:20 -0700358 * Return Value: Number of bytes received
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 */
Felipe Balbib1c43f82011-03-21 12:25:08 +0200360static unsigned int hci_uart_tty_receive(struct tty_struct *tty,
361 const u8 *data, char *flags, int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362{
363 struct hci_uart *hu = (void *)tty->disc_data;
Felipe Balbib1c43f82011-03-21 12:25:08 +0200364 int received;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200365
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 if (!hu || tty != hu->tty)
Felipe Balbib1c43f82011-03-21 12:25:08 +0200367 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
369 if (!test_bit(HCI_UART_PROTO_SET, &hu->flags))
Felipe Balbib1c43f82011-03-21 12:25:08 +0200370 return -EINVAL;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200371
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 spin_lock(&hu->rx_lock);
Felipe Balbib1c43f82011-03-21 12:25:08 +0200373 received = hu->proto->recv(hu, (void *) data, count);
Linus Torvalds99dff582011-05-23 12:23:20 -0700374 if (received > 0)
375 hu->hdev->stat.byte_rx += received;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 spin_unlock(&hu->rx_lock);
377
Alan Cox39c2e602008-04-30 00:54:18 -0700378 tty_unthrottle(tty);
Felipe Balbib1c43f82011-03-21 12:25:08 +0200379
380 return received;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381}
382
383static int hci_uart_register_dev(struct hci_uart *hu)
384{
385 struct hci_dev *hdev;
386
387 BT_DBG("");
388
389 /* Initialize and register HCI device */
390 hdev = hci_alloc_dev();
391 if (!hdev) {
392 BT_ERR("Can't allocate HCI device");
393 return -ENOMEM;
394 }
395
396 hu->hdev = hdev;
397
Marcel Holtmannc13854c2010-02-08 15:27:07 +0100398 hdev->bus = HCI_UART;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 hdev->driver_data = hu;
400
401 hdev->open = hci_uart_open;
402 hdev->close = hci_uart_close;
403 hdev->flush = hci_uart_flush;
404 hdev->send = hci_uart_send_frame;
405 hdev->destruct = hci_uart_destruct;
Andrei Warkentin7f4b2b02011-02-11 17:19:26 -0600406 hdev->parent = hu->tty->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407
408 hdev->owner = THIS_MODULE;
409
Marcel Holtmann7a9d4022008-11-30 12:17:26 +0100410 if (!reset)
411 set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412
Johan Hedberg63c7d092010-07-12 11:37:04 -0300413 if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags))
414 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
415
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 if (hci_register_dev(hdev) < 0) {
417 BT_ERR("Can't register HCI device");
418 hci_free_dev(hdev);
419 return -ENODEV;
420 }
421
422 return 0;
423}
424
425static int hci_uart_set_proto(struct hci_uart *hu, int id)
426{
427 struct hci_uart_proto *p;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200428 int err;
429
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 p = hci_uart_get_proto(id);
431 if (!p)
432 return -EPROTONOSUPPORT;
433
434 err = p->open(hu);
435 if (err)
436 return err;
437
438 hu->proto = p;
439
440 err = hci_uart_register_dev(hu);
441 if (err) {
442 p->close(hu);
443 return err;
444 }
Marcel Holtmann0372a662005-10-28 19:20:45 +0200445
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 return 0;
447}
448
449/* hci_uart_tty_ioctl()
450 *
451 * Process IOCTL system call for the tty device.
452 *
453 * Arguments:
454 *
455 * tty pointer to tty instance data
456 * file pointer to open file object for device
457 * cmd IOCTL command code
458 * arg argument for IOCTL call (cmd dependent)
459 *
460 * Return Value: Command dependent
461 */
462static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file * file,
Marcel Holtmann0372a662005-10-28 19:20:45 +0200463 unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464{
465 struct hci_uart *hu = (void *)tty->disc_data;
466 int err = 0;
467
468 BT_DBG("");
469
470 /* Verify the status of the device */
471 if (!hu)
472 return -EBADF;
473
474 switch (cmd) {
475 case HCIUARTSETPROTO:
476 if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) {
477 err = hci_uart_set_proto(hu, arg);
478 if (err) {
479 clear_bit(HCI_UART_PROTO_SET, &hu->flags);
480 return err;
481 }
Marcel Holtmann0372a662005-10-28 19:20:45 +0200482 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 return -EBUSY;
Marcel Holtmannc33be3c2007-05-09 09:15:45 +0200484 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485
486 case HCIUARTGETPROTO:
487 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
488 return hu->proto->id;
489 return -EUNATCH;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200490
Marcel Holtmannd2158742007-05-09 09:15:35 +0200491 case HCIUARTGETDEVICE:
492 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
493 return hu->hdev->id;
494 return -EUNATCH;
495
Johan Hedberg63c7d092010-07-12 11:37:04 -0300496 case HCIUARTSETFLAGS:
497 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
498 return -EBUSY;
499 hu->hdev_flags = arg;
500 break;
501
502 case HCIUARTGETFLAGS:
503 return hu->hdev_flags;
504
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 default:
Alan Cox47afa7a2008-10-13 10:44:17 +0100506 err = n_tty_ioctl_helper(tty, file, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 break;
508 };
509
510 return err;
511}
512
513/*
514 * We don't provide read/write/poll interface for user space.
515 */
Marcel Holtmann0372a662005-10-28 19:20:45 +0200516static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file,
517 unsigned char __user *buf, size_t nr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518{
519 return 0;
520}
521
Marcel Holtmann0372a662005-10-28 19:20:45 +0200522static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file,
523 const unsigned char *data, size_t count)
524{
525 return 0;
526}
527
528static unsigned int hci_uart_tty_poll(struct tty_struct *tty,
529 struct file *filp, poll_table *wait)
530{
531 return 0;
532}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533
534static int __init hci_uart_init(void)
535{
Alan Coxa352def2008-07-16 21:53:12 +0100536 static struct tty_ldisc_ops hci_uart_ldisc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 int err;
538
539 BT_INFO("HCI UART driver ver %s", VERSION);
540
541 /* Register the tty discipline */
542
543 memset(&hci_uart_ldisc, 0, sizeof (hci_uart_ldisc));
Marcel Holtmann0372a662005-10-28 19:20:45 +0200544 hci_uart_ldisc.magic = TTY_LDISC_MAGIC;
545 hci_uart_ldisc.name = "n_hci";
546 hci_uart_ldisc.open = hci_uart_tty_open;
547 hci_uart_ldisc.close = hci_uart_tty_close;
548 hci_uart_ldisc.read = hci_uart_tty_read;
549 hci_uart_ldisc.write = hci_uart_tty_write;
550 hci_uart_ldisc.ioctl = hci_uart_tty_ioctl;
551 hci_uart_ldisc.poll = hci_uart_tty_poll;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200552 hci_uart_ldisc.receive_buf = hci_uart_tty_receive;
553 hci_uart_ldisc.write_wakeup = hci_uart_tty_wakeup;
554 hci_uart_ldisc.owner = THIS_MODULE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555
556 if ((err = tty_register_ldisc(N_HCI, &hci_uart_ldisc))) {
557 BT_ERR("HCI line discipline registration failed. (%d)", err);
558 return err;
559 }
560
561#ifdef CONFIG_BT_HCIUART_H4
562 h4_init();
563#endif
564#ifdef CONFIG_BT_HCIUART_BCSP
565 bcsp_init();
566#endif
Ohad Ben-Cohen166d2f62007-10-20 13:42:36 +0200567#ifdef CONFIG_BT_HCIUART_LL
568 ll_init();
569#endif
Suraj Sumangalab3190df2010-07-19 12:34:07 +0530570#ifdef CONFIG_BT_HCIUART_ATH3K
571 ath_init();
572#endif
Ohad Ben-Cohen166d2f62007-10-20 13:42:36 +0200573
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 return 0;
575}
576
577static void __exit hci_uart_exit(void)
578{
579 int err;
580
581#ifdef CONFIG_BT_HCIUART_H4
582 h4_deinit();
583#endif
584#ifdef CONFIG_BT_HCIUART_BCSP
585 bcsp_deinit();
586#endif
Ohad Ben-Cohen166d2f62007-10-20 13:42:36 +0200587#ifdef CONFIG_BT_HCIUART_LL
588 ll_deinit();
589#endif
Suraj Sumangalab3190df2010-07-19 12:34:07 +0530590#ifdef CONFIG_BT_HCIUART_ATH3K
591 ath_deinit();
592#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593
594 /* Release tty registration of line discipline */
Alexey Dobriyan64ccd712005-06-23 00:10:33 -0700595 if ((err = tty_unregister_ldisc(N_HCI)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 BT_ERR("Can't unregister HCI line discipline (%d)", err);
597}
598
599module_init(hci_uart_init);
600module_exit(hci_uart_exit);
601
602module_param(reset, bool, 0644);
603MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
604
Marcel Holtmann63fbd242008-08-18 13:23:53 +0200605MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION);
607MODULE_VERSION(VERSION);
608MODULE_LICENSE("GPL");
609MODULE_ALIAS_LDISC(N_HCI);