blob: c8abce3d2d9c0618f2092c94398e3197d0396b27 [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
Johan Hedberg9f2aee82012-07-16 16:12:11 +0300159static void hci_uart_init_work(struct work_struct *work)
160{
161 struct hci_uart *hu = container_of(work, struct hci_uart, init_ready);
162 int err;
163
164 if (!test_and_clear_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
165 return;
166
167 err = hci_register_dev(hu->hdev);
168 if (err < 0) {
169 BT_ERR("Can't register HCI device");
170 hci_free_dev(hu->hdev);
171 hu->hdev = NULL;
172 hu->proto->close(hu);
173 }
174
175 set_bit(HCI_UART_REGISTERED, &hu->flags);
176}
177
178int hci_uart_init_ready(struct hci_uart *hu)
179{
180 if (!test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
181 return -EALREADY;
182
183 schedule_work(&hu->init_ready);
184
185 return 0;
186}
187
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188/* ------- Interface to HCI layer ------ */
189/* Initialize device */
190static int hci_uart_open(struct hci_dev *hdev)
191{
192 BT_DBG("%s %p", hdev->name, hdev);
193
194 /* Nothing to do for UART driver */
195
196 set_bit(HCI_RUNNING, &hdev->flags);
Marcel Holtmann0372a662005-10-28 19:20:45 +0200197
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 return 0;
199}
200
201/* Reset device */
202static int hci_uart_flush(struct hci_dev *hdev)
203{
David Herrmann155961e2012-02-09 21:58:32 +0100204 struct hci_uart *hu = hci_get_drvdata(hdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 struct tty_struct *tty = hu->tty;
206
207 BT_DBG("hdev %p tty %p", hdev, tty);
208
209 if (hu->tx_skb) {
210 kfree_skb(hu->tx_skb); hu->tx_skb = NULL;
211 }
212
213 /* Flush any pending characters in the driver and discipline. */
214 tty_ldisc_flush(tty);
Alan Coxf34d7a52008-04-30 00:54:13 -0700215 tty_driver_flush_buffer(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216
217 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
218 hu->proto->flush(hu);
219
220 return 0;
221}
222
223/* Close device */
224static int hci_uart_close(struct hci_dev *hdev)
225{
226 BT_DBG("hdev %p", hdev);
227
228 if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
229 return 0;
230
231 hci_uart_flush(hdev);
David Newall3611f4d2008-02-11 21:41:30 -0800232 hdev->flush = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 return 0;
234}
235
236/* Send frames from HCI layer */
237static int hci_uart_send_frame(struct sk_buff *skb)
238{
239 struct hci_dev* hdev = (struct hci_dev *) skb->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 struct hci_uart *hu;
241
242 if (!hdev) {
André Goddard Rosaaf901ca2009-11-14 13:09:05 -0200243 BT_ERR("Frame for unknown device (hdev=NULL)");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 return -ENODEV;
245 }
246
247 if (!test_bit(HCI_RUNNING, &hdev->flags))
248 return -EBUSY;
249
David Herrmann155961e2012-02-09 21:58:32 +0100250 hu = hci_get_drvdata(hdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
Marcel Holtmann0d48d932005-08-09 20:30:28 -0700252 BT_DBG("%s: type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
254 hu->proto->enqueue(hu, skb);
255
256 hci_uart_tx_wakeup(hu);
Marcel Holtmann0372a662005-10-28 19:20:45 +0200257
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 return 0;
259}
260
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261/* ------ LDISC part ------ */
262/* hci_uart_tty_open
263 *
264 * Called when line discipline changed to HCI_UART.
265 *
266 * Arguments:
267 * tty pointer to tty info structure
268 * Return Value:
269 * 0 if success, otherwise error code
270 */
271static int hci_uart_tty_open(struct tty_struct *tty)
272{
273 struct hci_uart *hu = (void *) tty->disc_data;
274
275 BT_DBG("tty %p", tty);
276
Alan Coxc19483c2010-10-22 14:11:26 +0100277 /* FIXME: This btw is bogus, nothing requires the old ldisc to clear
278 the pointer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 if (hu)
280 return -EEXIST;
281
Alan Coxc19483c2010-10-22 14:11:26 +0100282 /* Error if the tty has no write op instead of leaving an exploitable
283 hole */
284 if (tty->ops->write == NULL)
285 return -EOPNOTSUPP;
286
Deepak Saxena089b1db2005-11-07 01:01:26 -0800287 if (!(hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL))) {
Marcel Holtmann77851622006-09-21 16:23:19 +0200288 BT_ERR("Can't allocate control structure");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 return -ENFILE;
290 }
Marcel Holtmann0372a662005-10-28 19:20:45 +0200291
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 tty->disc_data = hu;
293 hu->tty = tty;
Alan Cox33f0f882006-01-09 20:54:13 -0800294 tty->receive_room = 65536;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295
Johan Hedberg9f2aee82012-07-16 16:12:11 +0300296 INIT_WORK(&hu->init_ready, hci_uart_init_work);
297
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 spin_lock_init(&hu->rx_lock);
299
300 /* Flush any pending characters in the driver and line discipline. */
Marcel Holtmann0372a662005-10-28 19:20:45 +0200301
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 /* FIXME: why is this needed. Note don't use ldisc_ref here as the
303 open path is before the ldisc is referencable */
Marcel Holtmann0372a662005-10-28 19:20:45 +0200304
Alan Coxc65c9bc2009-06-11 12:50:12 +0100305 if (tty->ldisc->ops->flush_buffer)
306 tty->ldisc->ops->flush_buffer(tty);
Alan Coxf34d7a52008-04-30 00:54:13 -0700307 tty_driver_flush_buffer(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
309 return 0;
310}
311
312/* hci_uart_tty_close()
313 *
314 * Called when the line discipline is changed to something
315 * else, the tty is closed, or the tty detects a hangup.
316 */
317static void hci_uart_tty_close(struct tty_struct *tty)
318{
319 struct hci_uart *hu = (void *)tty->disc_data;
Johan Hedbergdac670b2012-07-16 16:12:10 +0300320 struct hci_dev *hdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
322 BT_DBG("tty %p", tty);
323
324 /* Detach from the tty */
325 tty->disc_data = NULL;
326
Johan Hedbergdac670b2012-07-16 16:12:10 +0300327 if (!hu)
328 return;
Marcel Holtmann22ad4202007-05-09 09:15:40 +0200329
Johan Hedbergdac670b2012-07-16 16:12:10 +0300330 hdev = hu->hdev;
331 if (hdev)
332 hci_uart_close(hdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
Johan Hedbergdac670b2012-07-16 16:12:10 +0300334 if (test_and_clear_bit(HCI_UART_PROTO_SET, &hu->flags)) {
335 if (hdev) {
Johan Hedberg9f2aee82012-07-16 16:12:11 +0300336 if (test_bit(HCI_UART_REGISTERED, &hu->flags))
337 hci_unregister_dev(hdev);
Johan Hedbergdac670b2012-07-16 16:12:10 +0300338 hci_free_dev(hdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 }
Johan Hedbergdac670b2012-07-16 16:12:10 +0300340 hu->proto->close(hu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 }
Johan Hedbergdac670b2012-07-16 16:12:10 +0300342
343 kfree(hu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344}
345
346/* hci_uart_tty_wakeup()
347 *
348 * Callback for transmit wakeup. Called when low level
349 * device driver can accept more send data.
350 *
351 * Arguments: tty pointer to associated tty instance data
352 * Return Value: None
353 */
354static void hci_uart_tty_wakeup(struct tty_struct *tty)
355{
356 struct hci_uart *hu = (void *)tty->disc_data;
357
358 BT_DBG("");
359
360 if (!hu)
361 return;
362
363 clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
364
365 if (tty != hu->tty)
366 return;
367
368 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
369 hci_uart_tx_wakeup(hu);
370}
371
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372/* hci_uart_tty_receive()
373 *
374 * Called by tty low level driver when receive data is
375 * available.
376 *
377 * Arguments: tty pointer to tty isntance data
378 * data pointer to received data
379 * flags pointer to flags for data
380 * count count of received data in bytes
381 *
Linus Torvalds55db4c62011-06-04 06:33:24 +0900382 * Return Value: None
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 */
Linus Torvalds55db4c62011-06-04 06:33:24 +0900384static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data, char *flags, int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385{
386 struct hci_uart *hu = (void *)tty->disc_data;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200387
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 if (!hu || tty != hu->tty)
Linus Torvalds55db4c62011-06-04 06:33:24 +0900389 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
391 if (!test_bit(HCI_UART_PROTO_SET, &hu->flags))
Linus Torvalds55db4c62011-06-04 06:33:24 +0900392 return;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200393
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 spin_lock(&hu->rx_lock);
Linus Torvalds55db4c62011-06-04 06:33:24 +0900395 hu->proto->recv(hu, (void *) data, count);
396 hu->hdev->stat.byte_rx += count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 spin_unlock(&hu->rx_lock);
398
Alan Cox39c2e602008-04-30 00:54:18 -0700399 tty_unthrottle(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400}
401
402static int hci_uart_register_dev(struct hci_uart *hu)
403{
404 struct hci_dev *hdev;
405
406 BT_DBG("");
407
408 /* Initialize and register HCI device */
409 hdev = hci_alloc_dev();
410 if (!hdev) {
411 BT_ERR("Can't allocate HCI device");
412 return -ENOMEM;
413 }
414
415 hu->hdev = hdev;
416
Marcel Holtmannc13854c2010-02-08 15:27:07 +0100417 hdev->bus = HCI_UART;
David Herrmann155961e2012-02-09 21:58:32 +0100418 hci_set_drvdata(hdev, hu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419
420 hdev->open = hci_uart_open;
421 hdev->close = hci_uart_close;
422 hdev->flush = hci_uart_flush;
423 hdev->send = hci_uart_send_frame;
David Herrmann6935e0f2012-03-09 15:53:42 +0100424 SET_HCIDEV_DEV(hdev, hu->tty->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
Johan Hedberg63c7d092010-07-12 11:37:04 -0300426 if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags))
427 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
428
Marcel Holtmanna55e1f32012-02-24 17:12:24 +0100429 if (!test_bit(HCI_UART_RESET_ON_INIT, &hu->hdev_flags))
Szymon Janca6c511c2012-05-23 12:35:46 +0200430 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
Marcel Holtmanna55e1f32012-02-24 17:12:24 +0100431
Marcel Holtmann8a7a3fd2012-02-24 17:09:38 +0100432 if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags))
433 hdev->dev_type = HCI_AMP;
434 else
435 hdev->dev_type = HCI_BREDR;
436
Johan Hedberg9f2aee82012-07-16 16:12:11 +0300437 if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
438 return 0;
439
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 if (hci_register_dev(hdev) < 0) {
441 BT_ERR("Can't register HCI device");
442 hci_free_dev(hdev);
443 return -ENODEV;
444 }
445
Johan Hedberg9f2aee82012-07-16 16:12:11 +0300446 set_bit(HCI_UART_REGISTERED, &hu->flags);
447
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 return 0;
449}
450
451static int hci_uart_set_proto(struct hci_uart *hu, int id)
452{
453 struct hci_uart_proto *p;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200454 int err;
455
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 p = hci_uart_get_proto(id);
457 if (!p)
458 return -EPROTONOSUPPORT;
459
460 err = p->open(hu);
461 if (err)
462 return err;
463
464 hu->proto = p;
465
466 err = hci_uart_register_dev(hu);
467 if (err) {
468 p->close(hu);
469 return err;
470 }
Marcel Holtmann0372a662005-10-28 19:20:45 +0200471
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 return 0;
473}
474
475/* hci_uart_tty_ioctl()
476 *
477 * Process IOCTL system call for the tty device.
478 *
479 * Arguments:
480 *
481 * tty pointer to tty instance data
482 * file pointer to open file object for device
483 * cmd IOCTL command code
484 * arg argument for IOCTL call (cmd dependent)
485 *
486 * Return Value: Command dependent
487 */
488static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file * file,
Marcel Holtmann0372a662005-10-28 19:20:45 +0200489 unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490{
491 struct hci_uart *hu = (void *)tty->disc_data;
492 int err = 0;
493
494 BT_DBG("");
495
496 /* Verify the status of the device */
497 if (!hu)
498 return -EBADF;
499
500 switch (cmd) {
501 case HCIUARTSETPROTO:
502 if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) {
503 err = hci_uart_set_proto(hu, arg);
504 if (err) {
505 clear_bit(HCI_UART_PROTO_SET, &hu->flags);
506 return err;
507 }
Marcel Holtmann0372a662005-10-28 19:20:45 +0200508 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 return -EBUSY;
Marcel Holtmannc33be3c2007-05-09 09:15:45 +0200510 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511
512 case HCIUARTGETPROTO:
513 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
514 return hu->proto->id;
515 return -EUNATCH;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200516
Marcel Holtmannd2158742007-05-09 09:15:35 +0200517 case HCIUARTGETDEVICE:
518 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
519 return hu->hdev->id;
520 return -EUNATCH;
521
Johan Hedberg63c7d092010-07-12 11:37:04 -0300522 case HCIUARTSETFLAGS:
523 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
524 return -EBUSY;
525 hu->hdev_flags = arg;
526 break;
527
528 case HCIUARTGETFLAGS:
529 return hu->hdev_flags;
530
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 default:
Alan Cox47afa7a2008-10-13 10:44:17 +0100532 err = n_tty_ioctl_helper(tty, file, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 break;
Peter Senna Tschudina20890d2012-09-07 17:24:39 +0200534 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535
536 return err;
537}
538
539/*
540 * We don't provide read/write/poll interface for user space.
541 */
Marcel Holtmann0372a662005-10-28 19:20:45 +0200542static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file,
543 unsigned char __user *buf, size_t nr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544{
545 return 0;
546}
547
Marcel Holtmann0372a662005-10-28 19:20:45 +0200548static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file,
549 const unsigned char *data, size_t count)
550{
551 return 0;
552}
553
554static unsigned int hci_uart_tty_poll(struct tty_struct *tty,
555 struct file *filp, poll_table *wait)
556{
557 return 0;
558}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
560static int __init hci_uart_init(void)
561{
Alan Coxa352def2008-07-16 21:53:12 +0100562 static struct tty_ldisc_ops hci_uart_ldisc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 int err;
564
565 BT_INFO("HCI UART driver ver %s", VERSION);
566
567 /* Register the tty discipline */
568
569 memset(&hci_uart_ldisc, 0, sizeof (hci_uart_ldisc));
Marcel Holtmann0372a662005-10-28 19:20:45 +0200570 hci_uart_ldisc.magic = TTY_LDISC_MAGIC;
571 hci_uart_ldisc.name = "n_hci";
572 hci_uart_ldisc.open = hci_uart_tty_open;
573 hci_uart_ldisc.close = hci_uart_tty_close;
574 hci_uart_ldisc.read = hci_uart_tty_read;
575 hci_uart_ldisc.write = hci_uart_tty_write;
576 hci_uart_ldisc.ioctl = hci_uart_tty_ioctl;
577 hci_uart_ldisc.poll = hci_uart_tty_poll;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200578 hci_uart_ldisc.receive_buf = hci_uart_tty_receive;
579 hci_uart_ldisc.write_wakeup = hci_uart_tty_wakeup;
580 hci_uart_ldisc.owner = THIS_MODULE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581
582 if ((err = tty_register_ldisc(N_HCI, &hci_uart_ldisc))) {
583 BT_ERR("HCI line discipline registration failed. (%d)", err);
584 return err;
585 }
586
587#ifdef CONFIG_BT_HCIUART_H4
588 h4_init();
589#endif
590#ifdef CONFIG_BT_HCIUART_BCSP
591 bcsp_init();
592#endif
Ohad Ben-Cohen166d2f62007-10-20 13:42:36 +0200593#ifdef CONFIG_BT_HCIUART_LL
594 ll_init();
595#endif
Suraj Sumangalab3190df2010-07-19 12:34:07 +0530596#ifdef CONFIG_BT_HCIUART_ATH3K
597 ath_init();
598#endif
Johan Hedberg7dec65c2012-07-16 16:12:02 +0300599#ifdef CONFIG_BT_HCIUART_3WIRE
600 h5_init();
601#endif
Ohad Ben-Cohen166d2f62007-10-20 13:42:36 +0200602
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 return 0;
604}
605
606static void __exit hci_uart_exit(void)
607{
608 int err;
609
610#ifdef CONFIG_BT_HCIUART_H4
611 h4_deinit();
612#endif
613#ifdef CONFIG_BT_HCIUART_BCSP
614 bcsp_deinit();
615#endif
Ohad Ben-Cohen166d2f62007-10-20 13:42:36 +0200616#ifdef CONFIG_BT_HCIUART_LL
617 ll_deinit();
618#endif
Suraj Sumangalab3190df2010-07-19 12:34:07 +0530619#ifdef CONFIG_BT_HCIUART_ATH3K
620 ath_deinit();
621#endif
Johan Hedberg7dec65c2012-07-16 16:12:02 +0300622#ifdef CONFIG_BT_HCIUART_3WIRE
623 h5_deinit();
624#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625
626 /* Release tty registration of line discipline */
Alexey Dobriyan64ccd712005-06-23 00:10:33 -0700627 if ((err = tty_unregister_ldisc(N_HCI)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 BT_ERR("Can't unregister HCI line discipline (%d)", err);
629}
630
631module_init(hci_uart_init);
632module_exit(hci_uart_exit);
633
Marcel Holtmann63fbd242008-08-18 13:23:53 +0200634MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION);
636MODULE_VERSION(VERSION);
637MODULE_LICENSE("GPL");
638MODULE_ALIAS_LDISC(N_HCI);