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Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 | 2 | * |
0372a662 MH |
3 | * 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 | * | |
1da177e4 | 24 | */ |
1da177e4 | 25 | |
1da177e4 LT |
26 | #include <linux/module.h> |
27 | ||
28 | #include <linux/kernel.h> | |
29 | #include <linux/init.h> | |
1da177e4 LT |
30 | #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 | ||
0372a662 MH |
49 | #define VERSION "2.2" |
50 | ||
1da177e4 LT |
51 | static struct hci_uart_proto *hup[HCI_UART_MAX_PROTO]; |
52 | ||
53 | int 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; | |
0372a662 | 62 | |
1da177e4 LT |
63 | return 0; |
64 | } | |
65 | ||
66 | int 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; | |
0372a662 | 75 | |
1da177e4 LT |
76 | return 0; |
77 | } | |
78 | ||
79 | static struct hci_uart_proto *hci_uart_get_proto(unsigned int id) | |
80 | { | |
81 | if (id >= HCI_UART_MAX_PROTO) | |
82 | return NULL; | |
0372a662 | 83 | |
1da177e4 LT |
84 | return hup[id]; |
85 | } | |
86 | ||
87 | static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type) | |
88 | { | |
89 | struct hci_dev *hdev = hu->hdev; | |
0372a662 | 90 | |
1da177e4 LT |
91 | /* 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: | |
7f8f2729 | 102 | hdev->stat.sco_tx++; |
1da177e4 LT |
103 | break; |
104 | } | |
105 | } | |
106 | ||
107 | static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu) | |
108 | { | |
109 | struct sk_buff *skb = hu->tx_skb; | |
0372a662 | 110 | |
1da177e4 LT |
111 | if (!skb) |
112 | skb = hu->proto->dequeue(hu); | |
113 | else | |
114 | hu->tx_skb = NULL; | |
0372a662 | 115 | |
1da177e4 LT |
116 | return skb; |
117 | } | |
118 | ||
119 | int hci_uart_tx_wakeup(struct hci_uart *hu) | |
120 | { | |
1da177e4 LT |
121 | if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state)) { |
122 | set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); | |
123 | return 0; | |
124 | } | |
125 | ||
126 | BT_DBG(""); | |
127 | ||
da64c27d FB |
128 | schedule_work(&hu->write_work); |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
133 | static void hci_uart_write_work(struct work_struct *work) | |
134 | { | |
135 | struct hci_uart *hu = container_of(work, struct hci_uart, write_work); | |
136 | struct tty_struct *tty = hu->tty; | |
137 | struct hci_dev *hdev = hu->hdev; | |
138 | struct sk_buff *skb; | |
139 | ||
140 | /* REVISIT: should we cope with bad skbs or ->write() returning | |
141 | * and error value ? | |
142 | */ | |
143 | ||
1da177e4 LT |
144 | restart: |
145 | clear_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); | |
146 | ||
147 | while ((skb = hci_uart_dequeue(hu))) { | |
148 | int len; | |
0372a662 | 149 | |
1da177e4 | 150 | set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); |
f34d7a5b | 151 | len = tty->ops->write(tty, skb->data, skb->len); |
1da177e4 LT |
152 | hdev->stat.byte_tx += len; |
153 | ||
154 | skb_pull(skb, len); | |
155 | if (skb->len) { | |
156 | hu->tx_skb = skb; | |
157 | break; | |
158 | } | |
0372a662 | 159 | |
0d48d939 | 160 | hci_uart_tx_complete(hu, bt_cb(skb)->pkt_type); |
1da177e4 | 161 | kfree_skb(skb); |
0372a662 MH |
162 | } |
163 | ||
1da177e4 LT |
164 | if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state)) |
165 | goto restart; | |
166 | ||
167 | clear_bit(HCI_UART_SENDING, &hu->tx_state); | |
1da177e4 LT |
168 | } |
169 | ||
9f2aee84 JH |
170 | static void hci_uart_init_work(struct work_struct *work) |
171 | { | |
172 | struct hci_uart *hu = container_of(work, struct hci_uart, init_ready); | |
173 | int err; | |
174 | ||
175 | if (!test_and_clear_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) | |
176 | return; | |
177 | ||
178 | err = hci_register_dev(hu->hdev); | |
179 | if (err < 0) { | |
180 | BT_ERR("Can't register HCI device"); | |
181 | hci_free_dev(hu->hdev); | |
182 | hu->hdev = NULL; | |
183 | hu->proto->close(hu); | |
184 | } | |
185 | ||
186 | set_bit(HCI_UART_REGISTERED, &hu->flags); | |
187 | } | |
188 | ||
189 | int hci_uart_init_ready(struct hci_uart *hu) | |
190 | { | |
191 | if (!test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) | |
192 | return -EALREADY; | |
193 | ||
194 | schedule_work(&hu->init_ready); | |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
1da177e4 LT |
199 | /* ------- Interface to HCI layer ------ */ |
200 | /* Initialize device */ | |
201 | static int hci_uart_open(struct hci_dev *hdev) | |
202 | { | |
203 | BT_DBG("%s %p", hdev->name, hdev); | |
204 | ||
205 | /* Nothing to do for UART driver */ | |
206 | ||
207 | set_bit(HCI_RUNNING, &hdev->flags); | |
0372a662 | 208 | |
1da177e4 LT |
209 | return 0; |
210 | } | |
211 | ||
212 | /* Reset device */ | |
213 | static int hci_uart_flush(struct hci_dev *hdev) | |
214 | { | |
155961e8 | 215 | struct hci_uart *hu = hci_get_drvdata(hdev); |
1da177e4 LT |
216 | struct tty_struct *tty = hu->tty; |
217 | ||
218 | BT_DBG("hdev %p tty %p", hdev, tty); | |
219 | ||
220 | if (hu->tx_skb) { | |
221 | kfree_skb(hu->tx_skb); hu->tx_skb = NULL; | |
222 | } | |
223 | ||
224 | /* Flush any pending characters in the driver and discipline. */ | |
225 | tty_ldisc_flush(tty); | |
f34d7a5b | 226 | tty_driver_flush_buffer(tty); |
1da177e4 LT |
227 | |
228 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
229 | hu->proto->flush(hu); | |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
234 | /* Close device */ | |
235 | static int hci_uart_close(struct hci_dev *hdev) | |
236 | { | |
237 | BT_DBG("hdev %p", hdev); | |
238 | ||
239 | if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags)) | |
240 | return 0; | |
241 | ||
242 | hci_uart_flush(hdev); | |
3611f4d2 | 243 | hdev->flush = NULL; |
1da177e4 LT |
244 | return 0; |
245 | } | |
246 | ||
247 | /* Send frames from HCI layer */ | |
7bd8f09f | 248 | static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb) |
1da177e4 | 249 | { |
52bc423a | 250 | struct hci_uart *hu = hci_get_drvdata(hdev); |
1da177e4 LT |
251 | |
252 | if (!test_bit(HCI_RUNNING, &hdev->flags)) | |
253 | return -EBUSY; | |
254 | ||
0d48d939 | 255 | BT_DBG("%s: type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
1da177e4 LT |
256 | |
257 | hu->proto->enqueue(hu, skb); | |
258 | ||
259 | hci_uart_tx_wakeup(hu); | |
0372a662 | 260 | |
1da177e4 LT |
261 | return 0; |
262 | } | |
263 | ||
eb173809 LP |
264 | static int hci_uart_setup(struct hci_dev *hdev) |
265 | { | |
266 | struct hci_uart *hu = hci_get_drvdata(hdev); | |
267 | ||
268 | if (hu->proto->setup) | |
269 | return hu->proto->setup(hu); | |
270 | ||
271 | return 0; | |
272 | } | |
273 | ||
1da177e4 LT |
274 | /* ------ LDISC part ------ */ |
275 | /* hci_uart_tty_open | |
1687dfc3 | 276 | * |
1da177e4 LT |
277 | * Called when line discipline changed to HCI_UART. |
278 | * | |
279 | * Arguments: | |
280 | * tty pointer to tty info structure | |
1687dfc3 | 281 | * Return Value: |
1da177e4 LT |
282 | * 0 if success, otherwise error code |
283 | */ | |
284 | static int hci_uart_tty_open(struct tty_struct *tty) | |
285 | { | |
f327b340 | 286 | struct hci_uart *hu; |
1da177e4 LT |
287 | |
288 | BT_DBG("tty %p", tty); | |
289 | ||
c19483cc AC |
290 | /* Error if the tty has no write op instead of leaving an exploitable |
291 | hole */ | |
292 | if (tty->ops->write == NULL) | |
293 | return -EOPNOTSUPP; | |
294 | ||
a08b15e6 VI |
295 | hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL); |
296 | if (!hu) { | |
7785162c | 297 | BT_ERR("Can't allocate control structure"); |
1da177e4 LT |
298 | return -ENFILE; |
299 | } | |
0372a662 | 300 | |
1da177e4 LT |
301 | tty->disc_data = hu; |
302 | hu->tty = tty; | |
33f0f88f | 303 | tty->receive_room = 65536; |
1da177e4 | 304 | |
9f2aee84 | 305 | INIT_WORK(&hu->init_ready, hci_uart_init_work); |
da64c27d | 306 | INIT_WORK(&hu->write_work, hci_uart_write_work); |
9f2aee84 | 307 | |
1da177e4 LT |
308 | spin_lock_init(&hu->rx_lock); |
309 | ||
310 | /* Flush any pending characters in the driver and line discipline. */ | |
0372a662 | 311 | |
1da177e4 LT |
312 | /* FIXME: why is this needed. Note don't use ldisc_ref here as the |
313 | open path is before the ldisc is referencable */ | |
0372a662 | 314 | |
c65c9bc3 AC |
315 | if (tty->ldisc->ops->flush_buffer) |
316 | tty->ldisc->ops->flush_buffer(tty); | |
f34d7a5b | 317 | tty_driver_flush_buffer(tty); |
1da177e4 LT |
318 | |
319 | return 0; | |
320 | } | |
321 | ||
322 | /* hci_uart_tty_close() | |
323 | * | |
324 | * Called when the line discipline is changed to something | |
325 | * else, the tty is closed, or the tty detects a hangup. | |
326 | */ | |
327 | static void hci_uart_tty_close(struct tty_struct *tty) | |
328 | { | |
329 | struct hci_uart *hu = (void *)tty->disc_data; | |
dac670b9 | 330 | struct hci_dev *hdev; |
1da177e4 LT |
331 | |
332 | BT_DBG("tty %p", tty); | |
333 | ||
334 | /* Detach from the tty */ | |
335 | tty->disc_data = NULL; | |
336 | ||
dac670b9 JH |
337 | if (!hu) |
338 | return; | |
22ad4203 | 339 | |
dac670b9 JH |
340 | hdev = hu->hdev; |
341 | if (hdev) | |
342 | hci_uart_close(hdev); | |
1da177e4 | 343 | |
da64c27d FB |
344 | cancel_work_sync(&hu->write_work); |
345 | ||
dac670b9 JH |
346 | if (test_and_clear_bit(HCI_UART_PROTO_SET, &hu->flags)) { |
347 | if (hdev) { | |
9f2aee84 JH |
348 | if (test_bit(HCI_UART_REGISTERED, &hu->flags)) |
349 | hci_unregister_dev(hdev); | |
dac670b9 | 350 | hci_free_dev(hdev); |
1da177e4 | 351 | } |
dac670b9 | 352 | hu->proto->close(hu); |
1da177e4 | 353 | } |
dac670b9 JH |
354 | |
355 | kfree(hu); | |
1da177e4 LT |
356 | } |
357 | ||
358 | /* hci_uart_tty_wakeup() | |
359 | * | |
360 | * Callback for transmit wakeup. Called when low level | |
361 | * device driver can accept more send data. | |
362 | * | |
363 | * Arguments: tty pointer to associated tty instance data | |
364 | * Return Value: None | |
365 | */ | |
366 | static void hci_uart_tty_wakeup(struct tty_struct *tty) | |
367 | { | |
368 | struct hci_uart *hu = (void *)tty->disc_data; | |
369 | ||
370 | BT_DBG(""); | |
371 | ||
372 | if (!hu) | |
373 | return; | |
374 | ||
375 | clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); | |
376 | ||
377 | if (tty != hu->tty) | |
378 | return; | |
379 | ||
380 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
381 | hci_uart_tx_wakeup(hu); | |
382 | } | |
383 | ||
1da177e4 | 384 | /* hci_uart_tty_receive() |
1687dfc3 | 385 | * |
1da177e4 LT |
386 | * Called by tty low level driver when receive data is |
387 | * available. | |
1687dfc3 | 388 | * |
1da177e4 LT |
389 | * Arguments: tty pointer to tty isntance data |
390 | * data pointer to received data | |
391 | * flags pointer to flags for data | |
392 | * count count of received data in bytes | |
1687dfc3 | 393 | * |
55db4c64 | 394 | * Return Value: None |
1da177e4 | 395 | */ |
55db4c64 | 396 | static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data, char *flags, int count) |
1da177e4 LT |
397 | { |
398 | struct hci_uart *hu = (void *)tty->disc_data; | |
0372a662 | 399 | |
1da177e4 | 400 | if (!hu || tty != hu->tty) |
55db4c64 | 401 | return; |
1da177e4 LT |
402 | |
403 | if (!test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
55db4c64 | 404 | return; |
0372a662 | 405 | |
1da177e4 | 406 | spin_lock(&hu->rx_lock); |
55db4c64 | 407 | hu->proto->recv(hu, (void *) data, count); |
788f0923 CP |
408 | |
409 | if (hu->hdev) | |
410 | hu->hdev->stat.byte_rx += count; | |
411 | ||
1da177e4 LT |
412 | spin_unlock(&hu->rx_lock); |
413 | ||
39c2e60f | 414 | tty_unthrottle(tty); |
1da177e4 LT |
415 | } |
416 | ||
417 | static int hci_uart_register_dev(struct hci_uart *hu) | |
418 | { | |
419 | struct hci_dev *hdev; | |
420 | ||
421 | BT_DBG(""); | |
422 | ||
423 | /* Initialize and register HCI device */ | |
424 | hdev = hci_alloc_dev(); | |
425 | if (!hdev) { | |
426 | BT_ERR("Can't allocate HCI device"); | |
427 | return -ENOMEM; | |
428 | } | |
429 | ||
430 | hu->hdev = hdev; | |
431 | ||
c13854ce | 432 | hdev->bus = HCI_UART; |
155961e8 | 433 | hci_set_drvdata(hdev, hu); |
1da177e4 LT |
434 | |
435 | hdev->open = hci_uart_open; | |
436 | hdev->close = hci_uart_close; | |
437 | hdev->flush = hci_uart_flush; | |
438 | hdev->send = hci_uart_send_frame; | |
eb173809 | 439 | hdev->setup = hci_uart_setup; |
6935e0f5 | 440 | SET_HCIDEV_DEV(hdev, hu->tty->dev); |
1da177e4 | 441 | |
63c7d09c JH |
442 | if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags)) |
443 | set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks); | |
444 | ||
6afd04ad MH |
445 | if (test_bit(HCI_UART_EXT_CONFIG, &hu->hdev_flags)) |
446 | set_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks); | |
447 | ||
a55e1f38 | 448 | if (!test_bit(HCI_UART_RESET_ON_INIT, &hu->hdev_flags)) |
a6c511c6 | 449 | set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks); |
a55e1f38 | 450 | |
8a7a3fd6 MH |
451 | if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags)) |
452 | hdev->dev_type = HCI_AMP; | |
453 | else | |
454 | hdev->dev_type = HCI_BREDR; | |
455 | ||
9f2aee84 JH |
456 | if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) |
457 | return 0; | |
458 | ||
1da177e4 LT |
459 | if (hci_register_dev(hdev) < 0) { |
460 | BT_ERR("Can't register HCI device"); | |
461 | hci_free_dev(hdev); | |
462 | return -ENODEV; | |
463 | } | |
464 | ||
9f2aee84 JH |
465 | set_bit(HCI_UART_REGISTERED, &hu->flags); |
466 | ||
1da177e4 LT |
467 | return 0; |
468 | } | |
469 | ||
470 | static int hci_uart_set_proto(struct hci_uart *hu, int id) | |
471 | { | |
472 | struct hci_uart_proto *p; | |
0372a662 MH |
473 | int err; |
474 | ||
1da177e4 LT |
475 | p = hci_uart_get_proto(id); |
476 | if (!p) | |
477 | return -EPROTONOSUPPORT; | |
478 | ||
479 | err = p->open(hu); | |
480 | if (err) | |
481 | return err; | |
482 | ||
483 | hu->proto = p; | |
484 | ||
485 | err = hci_uart_register_dev(hu); | |
486 | if (err) { | |
487 | p->close(hu); | |
488 | return err; | |
489 | } | |
0372a662 | 490 | |
1da177e4 LT |
491 | return 0; |
492 | } | |
493 | ||
bb72bd68 MH |
494 | static int hci_uart_set_flags(struct hci_uart *hu, unsigned long flags) |
495 | { | |
496 | unsigned long valid_flags = BIT(HCI_UART_RAW_DEVICE) | | |
497 | BIT(HCI_UART_RESET_ON_INIT) | | |
498 | BIT(HCI_UART_CREATE_AMP) | | |
6afd04ad MH |
499 | BIT(HCI_UART_INIT_PENDING) | |
500 | BIT(HCI_UART_EXT_CONFIG); | |
bb72bd68 MH |
501 | |
502 | if ((flags & ~valid_flags)) | |
503 | return -EINVAL; | |
504 | ||
505 | hu->hdev_flags = flags; | |
506 | ||
507 | return 0; | |
508 | } | |
509 | ||
1da177e4 LT |
510 | /* hci_uart_tty_ioctl() |
511 | * | |
512 | * Process IOCTL system call for the tty device. | |
513 | * | |
514 | * Arguments: | |
515 | * | |
516 | * tty pointer to tty instance data | |
517 | * file pointer to open file object for device | |
518 | * cmd IOCTL command code | |
519 | * arg argument for IOCTL call (cmd dependent) | |
520 | * | |
521 | * Return Value: Command dependent | |
522 | */ | |
523 | static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file * file, | |
0372a662 | 524 | unsigned int cmd, unsigned long arg) |
1da177e4 LT |
525 | { |
526 | struct hci_uart *hu = (void *)tty->disc_data; | |
527 | int err = 0; | |
528 | ||
529 | BT_DBG(""); | |
530 | ||
531 | /* Verify the status of the device */ | |
532 | if (!hu) | |
533 | return -EBADF; | |
534 | ||
535 | switch (cmd) { | |
536 | case HCIUARTSETPROTO: | |
537 | if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) { | |
538 | err = hci_uart_set_proto(hu, arg); | |
539 | if (err) { | |
540 | clear_bit(HCI_UART_PROTO_SET, &hu->flags); | |
541 | return err; | |
542 | } | |
0372a662 | 543 | } else |
1da177e4 | 544 | return -EBUSY; |
c33be3c3 | 545 | break; |
1da177e4 LT |
546 | |
547 | case HCIUARTGETPROTO: | |
548 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
549 | return hu->proto->id; | |
550 | return -EUNATCH; | |
0372a662 | 551 | |
d2158744 | 552 | case HCIUARTGETDEVICE: |
c7e0c141 | 553 | if (test_bit(HCI_UART_REGISTERED, &hu->flags)) |
d2158744 MH |
554 | return hu->hdev->id; |
555 | return -EUNATCH; | |
556 | ||
63c7d09c JH |
557 | case HCIUARTSETFLAGS: |
558 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
559 | return -EBUSY; | |
bb72bd68 MH |
560 | err = hci_uart_set_flags(hu, arg); |
561 | if (err) | |
562 | return err; | |
63c7d09c JH |
563 | break; |
564 | ||
565 | case HCIUARTGETFLAGS: | |
566 | return hu->hdev_flags; | |
567 | ||
1da177e4 | 568 | default: |
47afa7a5 | 569 | err = n_tty_ioctl_helper(tty, file, cmd, arg); |
1da177e4 | 570 | break; |
a20890d0 | 571 | } |
1da177e4 LT |
572 | |
573 | return err; | |
574 | } | |
575 | ||
576 | /* | |
577 | * We don't provide read/write/poll interface for user space. | |
578 | */ | |
0372a662 MH |
579 | static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file, |
580 | unsigned char __user *buf, size_t nr) | |
1da177e4 LT |
581 | { |
582 | return 0; | |
583 | } | |
0372a662 MH |
584 | |
585 | static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file, | |
586 | const unsigned char *data, size_t count) | |
1da177e4 LT |
587 | { |
588 | return 0; | |
589 | } | |
0372a662 MH |
590 | |
591 | static unsigned int hci_uart_tty_poll(struct tty_struct *tty, | |
592 | struct file *filp, poll_table *wait) | |
1da177e4 LT |
593 | { |
594 | return 0; | |
595 | } | |
596 | ||
1da177e4 LT |
597 | static int __init hci_uart_init(void) |
598 | { | |
a352def2 | 599 | static struct tty_ldisc_ops hci_uart_ldisc; |
1da177e4 LT |
600 | int err; |
601 | ||
602 | BT_INFO("HCI UART driver ver %s", VERSION); | |
603 | ||
604 | /* Register the tty discipline */ | |
605 | ||
606 | memset(&hci_uart_ldisc, 0, sizeof (hci_uart_ldisc)); | |
0372a662 MH |
607 | hci_uart_ldisc.magic = TTY_LDISC_MAGIC; |
608 | hci_uart_ldisc.name = "n_hci"; | |
609 | hci_uart_ldisc.open = hci_uart_tty_open; | |
610 | hci_uart_ldisc.close = hci_uart_tty_close; | |
611 | hci_uart_ldisc.read = hci_uart_tty_read; | |
612 | hci_uart_ldisc.write = hci_uart_tty_write; | |
613 | hci_uart_ldisc.ioctl = hci_uart_tty_ioctl; | |
614 | hci_uart_ldisc.poll = hci_uart_tty_poll; | |
0372a662 MH |
615 | hci_uart_ldisc.receive_buf = hci_uart_tty_receive; |
616 | hci_uart_ldisc.write_wakeup = hci_uart_tty_wakeup; | |
617 | hci_uart_ldisc.owner = THIS_MODULE; | |
1da177e4 | 618 | |
a08b15e6 VI |
619 | err = tty_register_ldisc(N_HCI, &hci_uart_ldisc); |
620 | if (err) { | |
1da177e4 LT |
621 | BT_ERR("HCI line discipline registration failed. (%d)", err); |
622 | return err; | |
623 | } | |
624 | ||
625 | #ifdef CONFIG_BT_HCIUART_H4 | |
626 | h4_init(); | |
627 | #endif | |
628 | #ifdef CONFIG_BT_HCIUART_BCSP | |
629 | bcsp_init(); | |
630 | #endif | |
166d2f6a OBC |
631 | #ifdef CONFIG_BT_HCIUART_LL |
632 | ll_init(); | |
633 | #endif | |
b3190df6 SS |
634 | #ifdef CONFIG_BT_HCIUART_ATH3K |
635 | ath_init(); | |
636 | #endif | |
7dec65c8 JH |
637 | #ifdef CONFIG_BT_HCIUART_3WIRE |
638 | h5_init(); | |
639 | #endif | |
166d2f6a | 640 | |
1da177e4 LT |
641 | return 0; |
642 | } | |
643 | ||
644 | static void __exit hci_uart_exit(void) | |
645 | { | |
646 | int err; | |
647 | ||
648 | #ifdef CONFIG_BT_HCIUART_H4 | |
649 | h4_deinit(); | |
650 | #endif | |
651 | #ifdef CONFIG_BT_HCIUART_BCSP | |
652 | bcsp_deinit(); | |
653 | #endif | |
166d2f6a OBC |
654 | #ifdef CONFIG_BT_HCIUART_LL |
655 | ll_deinit(); | |
656 | #endif | |
b3190df6 SS |
657 | #ifdef CONFIG_BT_HCIUART_ATH3K |
658 | ath_deinit(); | |
659 | #endif | |
7dec65c8 JH |
660 | #ifdef CONFIG_BT_HCIUART_3WIRE |
661 | h5_deinit(); | |
662 | #endif | |
1da177e4 LT |
663 | |
664 | /* Release tty registration of line discipline */ | |
a08b15e6 VI |
665 | err = tty_unregister_ldisc(N_HCI); |
666 | if (err) | |
1da177e4 LT |
667 | BT_ERR("Can't unregister HCI line discipline (%d)", err); |
668 | } | |
669 | ||
670 | module_init(hci_uart_init); | |
671 | module_exit(hci_uart_exit); | |
672 | ||
63fbd24e | 673 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
674 | MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION); |
675 | MODULE_VERSION(VERSION); | |
676 | MODULE_LICENSE("GPL"); | |
677 | MODULE_ALIAS_LDISC(N_HCI); |