blob: e564579a6115989cb7857ca298eaee4ab43ca2ec [file] [log] [blame]
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 struct hci_uart_proto *hup[HCI_UART_MAX_PROTO];
52
53int hci_uart_register_proto(struct hci_uart_proto *p)
54{
55 if (p->id >= HCI_UART_MAX_PROTO)
56 return -EINVAL;
57
58 if (hup[p->id])
59 return -EEXIST;
60
61 hup[p->id] = p;
Marcel Holtmann0372a662005-10-28 19:20:45 +020062
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 return 0;
64}
65
66int hci_uart_unregister_proto(struct hci_uart_proto *p)
67{
68 if (p->id >= HCI_UART_MAX_PROTO)
69 return -EINVAL;
70
71 if (!hup[p->id])
72 return -EINVAL;
73
74 hup[p->id] = NULL;
Marcel Holtmann0372a662005-10-28 19:20:45 +020075
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 return 0;
77}
78
79static struct hci_uart_proto *hci_uart_get_proto(unsigned int id)
80{
81 if (id >= HCI_UART_MAX_PROTO)
82 return NULL;
Marcel Holtmann0372a662005-10-28 19:20:45 +020083
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 return hup[id];
85}
86
87static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type)
88{
89 struct hci_dev *hdev = hu->hdev;
Marcel Holtmann0372a662005-10-28 19:20:45 +020090
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 /* Update HCI stat counters */
92 switch (pkt_type) {
93 case HCI_COMMAND_PKT:
94 hdev->stat.cmd_tx++;
95 break;
96
97 case HCI_ACLDATA_PKT:
98 hdev->stat.acl_tx++;
99 break;
100
101 case HCI_SCODATA_PKT:
Karl Beldan7f8f2722010-10-07 21:57:10 +0200102 hdev->stat.sco_tx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 break;
104 }
105}
106
107static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu)
108{
109 struct sk_buff *skb = hu->tx_skb;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200110
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 if (!skb)
112 skb = hu->proto->dequeue(hu);
113 else
114 hu->tx_skb = NULL;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 return skb;
117}
118
119int hci_uart_tx_wakeup(struct hci_uart *hu)
120{
121 struct tty_struct *tty = hu->tty;
122 struct hci_dev *hdev = hu->hdev;
123 struct sk_buff *skb;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200124
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state)) {
126 set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state);
127 return 0;
128 }
129
130 BT_DBG("");
131
132restart:
133 clear_bit(HCI_UART_TX_WAKEUP, &hu->tx_state);
134
135 while ((skb = hci_uart_dequeue(hu))) {
136 int len;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200137
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
Alan Coxf34d7a52008-04-30 00:54:13 -0700139 len = tty->ops->write(tty, skb->data, skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 hdev->stat.byte_tx += len;
141
142 skb_pull(skb, len);
143 if (skb->len) {
144 hu->tx_skb = skb;
145 break;
146 }
Marcel Holtmann0372a662005-10-28 19:20:45 +0200147
Marcel Holtmann0d48d932005-08-09 20:30:28 -0700148 hci_uart_tx_complete(hu, bt_cb(skb)->pkt_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 kfree_skb(skb);
Marcel Holtmann0372a662005-10-28 19:20:45 +0200150 }
151
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state))
153 goto restart;
154
155 clear_bit(HCI_UART_SENDING, &hu->tx_state);
156 return 0;
157}
158
159/* ------- Interface to HCI layer ------ */
160/* Initialize device */
161static int hci_uart_open(struct hci_dev *hdev)
162{
163 BT_DBG("%s %p", hdev->name, hdev);
164
165 /* Nothing to do for UART driver */
166
167 set_bit(HCI_RUNNING, &hdev->flags);
Marcel Holtmann0372a662005-10-28 19:20:45 +0200168
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 return 0;
170}
171
172/* Reset device */
173static int hci_uart_flush(struct hci_dev *hdev)
174{
David Herrmann155961e2012-02-09 21:58:32 +0100175 struct hci_uart *hu = hci_get_drvdata(hdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 struct tty_struct *tty = hu->tty;
177
178 BT_DBG("hdev %p tty %p", hdev, tty);
179
180 if (hu->tx_skb) {
181 kfree_skb(hu->tx_skb); hu->tx_skb = NULL;
182 }
183
184 /* Flush any pending characters in the driver and discipline. */
185 tty_ldisc_flush(tty);
Alan Coxf34d7a52008-04-30 00:54:13 -0700186 tty_driver_flush_buffer(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
188 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
189 hu->proto->flush(hu);
190
191 return 0;
192}
193
194/* Close device */
195static int hci_uart_close(struct hci_dev *hdev)
196{
197 BT_DBG("hdev %p", hdev);
198
199 if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
200 return 0;
201
202 hci_uart_flush(hdev);
David Newall3611f4d2008-02-11 21:41:30 -0800203 hdev->flush = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 return 0;
205}
206
207/* Send frames from HCI layer */
208static int hci_uart_send_frame(struct sk_buff *skb)
209{
210 struct hci_dev* hdev = (struct hci_dev *) skb->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 struct hci_uart *hu;
212
213 if (!hdev) {
André Goddard Rosaaf901ca2009-11-14 13:09:05 -0200214 BT_ERR("Frame for unknown device (hdev=NULL)");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 return -ENODEV;
216 }
217
218 if (!test_bit(HCI_RUNNING, &hdev->flags))
219 return -EBUSY;
220
David Herrmann155961e2012-02-09 21:58:32 +0100221 hu = hci_get_drvdata(hdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Marcel Holtmann0d48d932005-08-09 20:30:28 -0700223 BT_DBG("%s: type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
225 hu->proto->enqueue(hu, skb);
226
227 hci_uart_tx_wakeup(hu);
Marcel Holtmann0372a662005-10-28 19:20:45 +0200228
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 return 0;
230}
231
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232/* ------ LDISC part ------ */
233/* hci_uart_tty_open
234 *
235 * Called when line discipline changed to HCI_UART.
236 *
237 * Arguments:
238 * tty pointer to tty info structure
239 * Return Value:
240 * 0 if success, otherwise error code
241 */
242static int hci_uart_tty_open(struct tty_struct *tty)
243{
244 struct hci_uart *hu = (void *) tty->disc_data;
245
246 BT_DBG("tty %p", tty);
247
Alan Coxc19483c2010-10-22 14:11:26 +0100248 /* FIXME: This btw is bogus, nothing requires the old ldisc to clear
249 the pointer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 if (hu)
251 return -EEXIST;
252
Alan Coxc19483c2010-10-22 14:11:26 +0100253 /* Error if the tty has no write op instead of leaving an exploitable
254 hole */
255 if (tty->ops->write == NULL)
256 return -EOPNOTSUPP;
257
Deepak Saxena089b1db2005-11-07 01:01:26 -0800258 if (!(hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL))) {
Marcel Holtmann77851622006-09-21 16:23:19 +0200259 BT_ERR("Can't allocate control structure");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 return -ENFILE;
261 }
Marcel Holtmann0372a662005-10-28 19:20:45 +0200262
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 tty->disc_data = hu;
264 hu->tty = tty;
Alan Cox33f0f882006-01-09 20:54:13 -0800265 tty->receive_room = 65536;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
267 spin_lock_init(&hu->rx_lock);
268
269 /* Flush any pending characters in the driver and line discipline. */
Marcel Holtmann0372a662005-10-28 19:20:45 +0200270
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 /* FIXME: why is this needed. Note don't use ldisc_ref here as the
272 open path is before the ldisc is referencable */
Marcel Holtmann0372a662005-10-28 19:20:45 +0200273
Alan Coxc65c9bc2009-06-11 12:50:12 +0100274 if (tty->ldisc->ops->flush_buffer)
275 tty->ldisc->ops->flush_buffer(tty);
Alan Coxf34d7a52008-04-30 00:54:13 -0700276 tty_driver_flush_buffer(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
278 return 0;
279}
280
281/* hci_uart_tty_close()
282 *
283 * Called when the line discipline is changed to something
284 * else, the tty is closed, or the tty detects a hangup.
285 */
286static void hci_uart_tty_close(struct tty_struct *tty)
287{
288 struct hci_uart *hu = (void *)tty->disc_data;
289
290 BT_DBG("tty %p", tty);
291
292 /* Detach from the tty */
293 tty->disc_data = NULL;
294
295 if (hu) {
296 struct hci_dev *hdev = hu->hdev;
Marcel Holtmann22ad4202007-05-09 09:15:40 +0200297
298 if (hdev)
299 hci_uart_close(hdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
301 if (test_and_clear_bit(HCI_UART_PROTO_SET, &hu->flags)) {
Jun Nied9319562010-12-07 14:03:38 +0800302 if (hdev) {
303 hci_unregister_dev(hdev);
304 hci_free_dev(hdev);
305 }
Johan Hovold33b69bf2012-03-15 14:48:40 +0100306 hu->proto->close(hu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 }
David Herrmann797fe792012-01-07 15:47:19 +0100308
309 kfree(hu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 }
311}
312
313/* hci_uart_tty_wakeup()
314 *
315 * Callback for transmit wakeup. Called when low level
316 * device driver can accept more send data.
317 *
318 * Arguments: tty pointer to associated tty instance data
319 * Return Value: None
320 */
321static void hci_uart_tty_wakeup(struct tty_struct *tty)
322{
323 struct hci_uart *hu = (void *)tty->disc_data;
324
325 BT_DBG("");
326
327 if (!hu)
328 return;
329
330 clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
331
332 if (tty != hu->tty)
333 return;
334
335 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
336 hci_uart_tx_wakeup(hu);
337}
338
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339/* hci_uart_tty_receive()
340 *
341 * Called by tty low level driver when receive data is
342 * available.
343 *
344 * Arguments: tty pointer to tty isntance data
345 * data pointer to received data
346 * flags pointer to flags for data
347 * count count of received data in bytes
348 *
Linus Torvalds55db4c62011-06-04 06:33:24 +0900349 * Return Value: None
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 */
Linus Torvalds55db4c62011-06-04 06:33:24 +0900351static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data, char *flags, int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352{
353 struct hci_uart *hu = (void *)tty->disc_data;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200354
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 if (!hu || tty != hu->tty)
Linus Torvalds55db4c62011-06-04 06:33:24 +0900356 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357
358 if (!test_bit(HCI_UART_PROTO_SET, &hu->flags))
Linus Torvalds55db4c62011-06-04 06:33:24 +0900359 return;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200360
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 spin_lock(&hu->rx_lock);
Linus Torvalds55db4c62011-06-04 06:33:24 +0900362 hu->proto->recv(hu, (void *) data, count);
363 hu->hdev->stat.byte_rx += count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 spin_unlock(&hu->rx_lock);
365
Alan Cox39c2e602008-04-30 00:54:18 -0700366 tty_unthrottle(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367}
368
369static int hci_uart_register_dev(struct hci_uart *hu)
370{
371 struct hci_dev *hdev;
372
373 BT_DBG("");
374
375 /* Initialize and register HCI device */
376 hdev = hci_alloc_dev();
377 if (!hdev) {
378 BT_ERR("Can't allocate HCI device");
379 return -ENOMEM;
380 }
381
382 hu->hdev = hdev;
383
Marcel Holtmannc13854c2010-02-08 15:27:07 +0100384 hdev->bus = HCI_UART;
David Herrmann155961e2012-02-09 21:58:32 +0100385 hci_set_drvdata(hdev, hu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386
387 hdev->open = hci_uart_open;
388 hdev->close = hci_uart_close;
389 hdev->flush = hci_uart_flush;
390 hdev->send = hci_uart_send_frame;
David Herrmann6935e0f2012-03-09 15:53:42 +0100391 SET_HCIDEV_DEV(hdev, hu->tty->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
Johan Hedberg63c7d092010-07-12 11:37:04 -0300393 if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags))
394 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
395
Marcel Holtmanna55e1f32012-02-24 17:12:24 +0100396 if (!test_bit(HCI_UART_RESET_ON_INIT, &hu->hdev_flags))
397 set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
398
Marcel Holtmann8a7a3fd2012-02-24 17:09:38 +0100399 if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags))
400 hdev->dev_type = HCI_AMP;
401 else
402 hdev->dev_type = HCI_BREDR;
403
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 if (hci_register_dev(hdev) < 0) {
405 BT_ERR("Can't register HCI device");
406 hci_free_dev(hdev);
407 return -ENODEV;
408 }
409
410 return 0;
411}
412
413static int hci_uart_set_proto(struct hci_uart *hu, int id)
414{
415 struct hci_uart_proto *p;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200416 int err;
417
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 p = hci_uart_get_proto(id);
419 if (!p)
420 return -EPROTONOSUPPORT;
421
422 err = p->open(hu);
423 if (err)
424 return err;
425
426 hu->proto = p;
427
428 err = hci_uart_register_dev(hu);
429 if (err) {
430 p->close(hu);
431 return err;
432 }
Marcel Holtmann0372a662005-10-28 19:20:45 +0200433
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 return 0;
435}
436
437/* hci_uart_tty_ioctl()
438 *
439 * Process IOCTL system call for the tty device.
440 *
441 * Arguments:
442 *
443 * tty pointer to tty instance data
444 * file pointer to open file object for device
445 * cmd IOCTL command code
446 * arg argument for IOCTL call (cmd dependent)
447 *
448 * Return Value: Command dependent
449 */
450static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file * file,
Marcel Holtmann0372a662005-10-28 19:20:45 +0200451 unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452{
453 struct hci_uart *hu = (void *)tty->disc_data;
454 int err = 0;
455
456 BT_DBG("");
457
458 /* Verify the status of the device */
459 if (!hu)
460 return -EBADF;
461
462 switch (cmd) {
463 case HCIUARTSETPROTO:
464 if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) {
465 err = hci_uart_set_proto(hu, arg);
466 if (err) {
467 clear_bit(HCI_UART_PROTO_SET, &hu->flags);
468 return err;
469 }
Marcel Holtmann0372a662005-10-28 19:20:45 +0200470 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 return -EBUSY;
Marcel Holtmannc33be3c2007-05-09 09:15:45 +0200472 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
474 case HCIUARTGETPROTO:
475 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
476 return hu->proto->id;
477 return -EUNATCH;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200478
Marcel Holtmannd2158742007-05-09 09:15:35 +0200479 case HCIUARTGETDEVICE:
480 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
481 return hu->hdev->id;
482 return -EUNATCH;
483
Johan Hedberg63c7d092010-07-12 11:37:04 -0300484 case HCIUARTSETFLAGS:
485 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
486 return -EBUSY;
487 hu->hdev_flags = arg;
488 break;
489
490 case HCIUARTGETFLAGS:
491 return hu->hdev_flags;
492
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 default:
Alan Cox47afa7a2008-10-13 10:44:17 +0100494 err = n_tty_ioctl_helper(tty, file, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 break;
496 };
497
498 return err;
499}
500
501/*
502 * We don't provide read/write/poll interface for user space.
503 */
Marcel Holtmann0372a662005-10-28 19:20:45 +0200504static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file,
505 unsigned char __user *buf, size_t nr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506{
507 return 0;
508}
509
Marcel Holtmann0372a662005-10-28 19:20:45 +0200510static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file,
511 const unsigned char *data, size_t count)
512{
513 return 0;
514}
515
516static unsigned int hci_uart_tty_poll(struct tty_struct *tty,
517 struct file *filp, poll_table *wait)
518{
519 return 0;
520}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521
522static int __init hci_uart_init(void)
523{
Alan Coxa352def2008-07-16 21:53:12 +0100524 static struct tty_ldisc_ops hci_uart_ldisc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 int err;
526
527 BT_INFO("HCI UART driver ver %s", VERSION);
528
529 /* Register the tty discipline */
530
531 memset(&hci_uart_ldisc, 0, sizeof (hci_uart_ldisc));
Marcel Holtmann0372a662005-10-28 19:20:45 +0200532 hci_uart_ldisc.magic = TTY_LDISC_MAGIC;
533 hci_uart_ldisc.name = "n_hci";
534 hci_uart_ldisc.open = hci_uart_tty_open;
535 hci_uart_ldisc.close = hci_uart_tty_close;
536 hci_uart_ldisc.read = hci_uart_tty_read;
537 hci_uart_ldisc.write = hci_uart_tty_write;
538 hci_uart_ldisc.ioctl = hci_uart_tty_ioctl;
539 hci_uart_ldisc.poll = hci_uart_tty_poll;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200540 hci_uart_ldisc.receive_buf = hci_uart_tty_receive;
541 hci_uart_ldisc.write_wakeup = hci_uart_tty_wakeup;
542 hci_uart_ldisc.owner = THIS_MODULE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543
544 if ((err = tty_register_ldisc(N_HCI, &hci_uart_ldisc))) {
545 BT_ERR("HCI line discipline registration failed. (%d)", err);
546 return err;
547 }
548
549#ifdef CONFIG_BT_HCIUART_H4
550 h4_init();
551#endif
552#ifdef CONFIG_BT_HCIUART_BCSP
553 bcsp_init();
554#endif
Ohad Ben-Cohen166d2f62007-10-20 13:42:36 +0200555#ifdef CONFIG_BT_HCIUART_LL
556 ll_init();
557#endif
Suraj Sumangalab3190df2010-07-19 12:34:07 +0530558#ifdef CONFIG_BT_HCIUART_ATH3K
559 ath_init();
560#endif
Ohad Ben-Cohen166d2f62007-10-20 13:42:36 +0200561
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 return 0;
563}
564
565static void __exit hci_uart_exit(void)
566{
567 int err;
568
569#ifdef CONFIG_BT_HCIUART_H4
570 h4_deinit();
571#endif
572#ifdef CONFIG_BT_HCIUART_BCSP
573 bcsp_deinit();
574#endif
Ohad Ben-Cohen166d2f62007-10-20 13:42:36 +0200575#ifdef CONFIG_BT_HCIUART_LL
576 ll_deinit();
577#endif
Suraj Sumangalab3190df2010-07-19 12:34:07 +0530578#ifdef CONFIG_BT_HCIUART_ATH3K
579 ath_deinit();
580#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581
582 /* Release tty registration of line discipline */
Alexey Dobriyan64ccd712005-06-23 00:10:33 -0700583 if ((err = tty_unregister_ldisc(N_HCI)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 BT_ERR("Can't unregister HCI line discipline (%d)", err);
585}
586
587module_init(hci_uart_init);
588module_exit(hci_uart_exit);
589
Marcel Holtmann63fbd242008-08-18 13:23:53 +0200590MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION);
592MODULE_VERSION(VERSION);
593MODULE_LICENSE("GPL");
594MODULE_ALIAS_LDISC(N_HCI);