blob: bc68a440d432cd21b2ee10885e7106cfe2852b79 [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
Chan-yeol Park1687dfc2013-04-02 21:24:23 +0900263 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 * Called when line discipline changed to HCI_UART.
265 *
266 * Arguments:
267 * tty pointer to tty info structure
Chan-yeol Park1687dfc2013-04-02 21:24:23 +0900268 * Return Value:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 * 0 if success, otherwise error code
270 */
271static int hci_uart_tty_open(struct tty_struct *tty)
272{
Jiri Slabyf327b342012-10-18 22:26:34 +0200273 struct hci_uart *hu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
275 BT_DBG("tty %p", tty);
276
Alan Coxc19483c2010-10-22 14:11:26 +0100277 /* Error if the tty has no write op instead of leaving an exploitable
278 hole */
279 if (tty->ops->write == NULL)
280 return -EOPNOTSUPP;
281
Deepak Saxena089b1db2005-11-07 01:01:26 -0800282 if (!(hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL))) {
Marcel Holtmann77851622006-09-21 16:23:19 +0200283 BT_ERR("Can't allocate control structure");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 return -ENFILE;
285 }
Marcel Holtmann0372a662005-10-28 19:20:45 +0200286
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 tty->disc_data = hu;
288 hu->tty = tty;
Alan Cox33f0f882006-01-09 20:54:13 -0800289 tty->receive_room = 65536;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290
Johan Hedberg9f2aee82012-07-16 16:12:11 +0300291 INIT_WORK(&hu->init_ready, hci_uart_init_work);
292
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 spin_lock_init(&hu->rx_lock);
294
295 /* Flush any pending characters in the driver and line discipline. */
Marcel Holtmann0372a662005-10-28 19:20:45 +0200296
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 /* FIXME: why is this needed. Note don't use ldisc_ref here as the
298 open path is before the ldisc is referencable */
Marcel Holtmann0372a662005-10-28 19:20:45 +0200299
Alan Coxc65c9bc2009-06-11 12:50:12 +0100300 if (tty->ldisc->ops->flush_buffer)
301 tty->ldisc->ops->flush_buffer(tty);
Alan Coxf34d7a52008-04-30 00:54:13 -0700302 tty_driver_flush_buffer(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
304 return 0;
305}
306
307/* hci_uart_tty_close()
308 *
309 * Called when the line discipline is changed to something
310 * else, the tty is closed, or the tty detects a hangup.
311 */
312static void hci_uart_tty_close(struct tty_struct *tty)
313{
314 struct hci_uart *hu = (void *)tty->disc_data;
Johan Hedbergdac670b2012-07-16 16:12:10 +0300315 struct hci_dev *hdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316
317 BT_DBG("tty %p", tty);
318
319 /* Detach from the tty */
320 tty->disc_data = NULL;
321
Johan Hedbergdac670b2012-07-16 16:12:10 +0300322 if (!hu)
323 return;
Marcel Holtmann22ad4202007-05-09 09:15:40 +0200324
Johan Hedbergdac670b2012-07-16 16:12:10 +0300325 hdev = hu->hdev;
326 if (hdev)
327 hci_uart_close(hdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
Johan Hedbergdac670b2012-07-16 16:12:10 +0300329 if (test_and_clear_bit(HCI_UART_PROTO_SET, &hu->flags)) {
330 if (hdev) {
Johan Hedberg9f2aee82012-07-16 16:12:11 +0300331 if (test_bit(HCI_UART_REGISTERED, &hu->flags))
332 hci_unregister_dev(hdev);
Johan Hedbergdac670b2012-07-16 16:12:10 +0300333 hci_free_dev(hdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 }
Johan Hedbergdac670b2012-07-16 16:12:10 +0300335 hu->proto->close(hu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 }
Johan Hedbergdac670b2012-07-16 16:12:10 +0300337
338 kfree(hu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339}
340
341/* hci_uart_tty_wakeup()
342 *
343 * Callback for transmit wakeup. Called when low level
344 * device driver can accept more send data.
345 *
346 * Arguments: tty pointer to associated tty instance data
347 * Return Value: None
348 */
349static void hci_uart_tty_wakeup(struct tty_struct *tty)
350{
351 struct hci_uart *hu = (void *)tty->disc_data;
352
353 BT_DBG("");
354
355 if (!hu)
356 return;
357
358 clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
359
360 if (tty != hu->tty)
361 return;
362
363 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
364 hci_uart_tx_wakeup(hu);
365}
366
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367/* hci_uart_tty_receive()
Chan-yeol Park1687dfc2013-04-02 21:24:23 +0900368 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 * Called by tty low level driver when receive data is
370 * available.
Chan-yeol Park1687dfc2013-04-02 21:24:23 +0900371 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 * Arguments: tty pointer to tty isntance data
373 * data pointer to received data
374 * flags pointer to flags for data
375 * count count of received data in bytes
Chan-yeol Park1687dfc2013-04-02 21:24:23 +0900376 *
Linus Torvalds55db4c62011-06-04 06:33:24 +0900377 * Return Value: None
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 */
Linus Torvalds55db4c62011-06-04 06:33:24 +0900379static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data, char *flags, int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380{
381 struct hci_uart *hu = (void *)tty->disc_data;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200382
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 if (!hu || tty != hu->tty)
Linus Torvalds55db4c62011-06-04 06:33:24 +0900384 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
386 if (!test_bit(HCI_UART_PROTO_SET, &hu->flags))
Linus Torvalds55db4c62011-06-04 06:33:24 +0900387 return;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200388
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 spin_lock(&hu->rx_lock);
Linus Torvalds55db4c62011-06-04 06:33:24 +0900390 hu->proto->recv(hu, (void *) data, count);
Chan-yeol Park788f0922013-04-02 21:24:22 +0900391
392 if (hu->hdev)
393 hu->hdev->stat.byte_rx += count;
394
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 spin_unlock(&hu->rx_lock);
396
Alan Cox39c2e602008-04-30 00:54:18 -0700397 tty_unthrottle(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398}
399
400static int hci_uart_register_dev(struct hci_uart *hu)
401{
402 struct hci_dev *hdev;
403
404 BT_DBG("");
405
406 /* Initialize and register HCI device */
407 hdev = hci_alloc_dev();
408 if (!hdev) {
409 BT_ERR("Can't allocate HCI device");
410 return -ENOMEM;
411 }
412
413 hu->hdev = hdev;
414
Marcel Holtmannc13854c2010-02-08 15:27:07 +0100415 hdev->bus = HCI_UART;
David Herrmann155961e2012-02-09 21:58:32 +0100416 hci_set_drvdata(hdev, hu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
418 hdev->open = hci_uart_open;
419 hdev->close = hci_uart_close;
420 hdev->flush = hci_uart_flush;
421 hdev->send = hci_uart_send_frame;
David Herrmann6935e0f2012-03-09 15:53:42 +0100422 SET_HCIDEV_DEV(hdev, hu->tty->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423
Johan Hedberg63c7d092010-07-12 11:37:04 -0300424 if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags))
425 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
426
Marcel Holtmanna55e1f32012-02-24 17:12:24 +0100427 if (!test_bit(HCI_UART_RESET_ON_INIT, &hu->hdev_flags))
Szymon Janca6c511c2012-05-23 12:35:46 +0200428 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
Marcel Holtmanna55e1f32012-02-24 17:12:24 +0100429
Marcel Holtmann8a7a3fd2012-02-24 17:09:38 +0100430 if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags))
431 hdev->dev_type = HCI_AMP;
432 else
433 hdev->dev_type = HCI_BREDR;
434
Johan Hedberg9f2aee82012-07-16 16:12:11 +0300435 if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
436 return 0;
437
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 if (hci_register_dev(hdev) < 0) {
439 BT_ERR("Can't register HCI device");
440 hci_free_dev(hdev);
441 return -ENODEV;
442 }
443
Johan Hedberg9f2aee82012-07-16 16:12:11 +0300444 set_bit(HCI_UART_REGISTERED, &hu->flags);
445
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 return 0;
447}
448
449static int hci_uart_set_proto(struct hci_uart *hu, int id)
450{
451 struct hci_uart_proto *p;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200452 int err;
453
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 p = hci_uart_get_proto(id);
455 if (!p)
456 return -EPROTONOSUPPORT;
457
458 err = p->open(hu);
459 if (err)
460 return err;
461
462 hu->proto = p;
463
464 err = hci_uart_register_dev(hu);
465 if (err) {
466 p->close(hu);
467 return err;
468 }
Marcel Holtmann0372a662005-10-28 19:20:45 +0200469
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 return 0;
471}
472
473/* hci_uart_tty_ioctl()
474 *
475 * Process IOCTL system call for the tty device.
476 *
477 * Arguments:
478 *
479 * tty pointer to tty instance data
480 * file pointer to open file object for device
481 * cmd IOCTL command code
482 * arg argument for IOCTL call (cmd dependent)
483 *
484 * Return Value: Command dependent
485 */
486static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file * file,
Marcel Holtmann0372a662005-10-28 19:20:45 +0200487 unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488{
489 struct hci_uart *hu = (void *)tty->disc_data;
490 int err = 0;
491
492 BT_DBG("");
493
494 /* Verify the status of the device */
495 if (!hu)
496 return -EBADF;
497
498 switch (cmd) {
499 case HCIUARTSETPROTO:
500 if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) {
501 err = hci_uart_set_proto(hu, arg);
502 if (err) {
503 clear_bit(HCI_UART_PROTO_SET, &hu->flags);
504 return err;
505 }
Marcel Holtmann0372a662005-10-28 19:20:45 +0200506 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 return -EBUSY;
Marcel Holtmannc33be3c2007-05-09 09:15:45 +0200508 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
510 case HCIUARTGETPROTO:
511 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
512 return hu->proto->id;
513 return -EUNATCH;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200514
Marcel Holtmannd2158742007-05-09 09:15:35 +0200515 case HCIUARTGETDEVICE:
516 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
517 return hu->hdev->id;
518 return -EUNATCH;
519
Johan Hedberg63c7d092010-07-12 11:37:04 -0300520 case HCIUARTSETFLAGS:
521 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
522 return -EBUSY;
523 hu->hdev_flags = arg;
524 break;
525
526 case HCIUARTGETFLAGS:
527 return hu->hdev_flags;
528
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 default:
Alan Cox47afa7a2008-10-13 10:44:17 +0100530 err = n_tty_ioctl_helper(tty, file, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 break;
Peter Senna Tschudina20890d2012-09-07 17:24:39 +0200532 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533
534 return err;
535}
536
537/*
538 * We don't provide read/write/poll interface for user space.
539 */
Marcel Holtmann0372a662005-10-28 19:20:45 +0200540static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file,
541 unsigned char __user *buf, size_t nr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542{
543 return 0;
544}
545
Marcel Holtmann0372a662005-10-28 19:20:45 +0200546static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file,
547 const unsigned char *data, size_t count)
548{
549 return 0;
550}
551
552static unsigned int hci_uart_tty_poll(struct tty_struct *tty,
553 struct file *filp, poll_table *wait)
554{
555 return 0;
556}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557
558static int __init hci_uart_init(void)
559{
Alan Coxa352def2008-07-16 21:53:12 +0100560 static struct tty_ldisc_ops hci_uart_ldisc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 int err;
562
563 BT_INFO("HCI UART driver ver %s", VERSION);
564
565 /* Register the tty discipline */
566
567 memset(&hci_uart_ldisc, 0, sizeof (hci_uart_ldisc));
Marcel Holtmann0372a662005-10-28 19:20:45 +0200568 hci_uart_ldisc.magic = TTY_LDISC_MAGIC;
569 hci_uart_ldisc.name = "n_hci";
570 hci_uart_ldisc.open = hci_uart_tty_open;
571 hci_uart_ldisc.close = hci_uart_tty_close;
572 hci_uart_ldisc.read = hci_uart_tty_read;
573 hci_uart_ldisc.write = hci_uart_tty_write;
574 hci_uart_ldisc.ioctl = hci_uart_tty_ioctl;
575 hci_uart_ldisc.poll = hci_uart_tty_poll;
Marcel Holtmann0372a662005-10-28 19:20:45 +0200576 hci_uart_ldisc.receive_buf = hci_uart_tty_receive;
577 hci_uart_ldisc.write_wakeup = hci_uart_tty_wakeup;
578 hci_uart_ldisc.owner = THIS_MODULE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
580 if ((err = tty_register_ldisc(N_HCI, &hci_uart_ldisc))) {
581 BT_ERR("HCI line discipline registration failed. (%d)", err);
582 return err;
583 }
584
585#ifdef CONFIG_BT_HCIUART_H4
586 h4_init();
587#endif
588#ifdef CONFIG_BT_HCIUART_BCSP
589 bcsp_init();
590#endif
Ohad Ben-Cohen166d2f62007-10-20 13:42:36 +0200591#ifdef CONFIG_BT_HCIUART_LL
592 ll_init();
593#endif
Suraj Sumangalab3190df2010-07-19 12:34:07 +0530594#ifdef CONFIG_BT_HCIUART_ATH3K
595 ath_init();
596#endif
Johan Hedberg7dec65c2012-07-16 16:12:02 +0300597#ifdef CONFIG_BT_HCIUART_3WIRE
598 h5_init();
599#endif
Ohad Ben-Cohen166d2f62007-10-20 13:42:36 +0200600
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 return 0;
602}
603
604static void __exit hci_uart_exit(void)
605{
606 int err;
607
608#ifdef CONFIG_BT_HCIUART_H4
609 h4_deinit();
610#endif
611#ifdef CONFIG_BT_HCIUART_BCSP
612 bcsp_deinit();
613#endif
Ohad Ben-Cohen166d2f62007-10-20 13:42:36 +0200614#ifdef CONFIG_BT_HCIUART_LL
615 ll_deinit();
616#endif
Suraj Sumangalab3190df2010-07-19 12:34:07 +0530617#ifdef CONFIG_BT_HCIUART_ATH3K
618 ath_deinit();
619#endif
Johan Hedberg7dec65c2012-07-16 16:12:02 +0300620#ifdef CONFIG_BT_HCIUART_3WIRE
621 h5_deinit();
622#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623
624 /* Release tty registration of line discipline */
Alexey Dobriyan64ccd712005-06-23 00:10:33 -0700625 if ((err = tty_unregister_ldisc(N_HCI)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 BT_ERR("Can't unregister HCI line discipline (%d)", err);
627}
628
629module_init(hci_uart_init);
630module_exit(hci_uart_exit);
631
Marcel Holtmann63fbd242008-08-18 13:23:53 +0200632MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION);
634MODULE_VERSION(VERSION);
635MODULE_LICENSE("GPL");
636MODULE_ALIAS_LDISC(N_HCI);