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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 | ||
788a6756 | 49 | #define VERSION "2.3" |
0372a662 | 50 | |
4ee7ef19 | 51 | static const struct hci_uart_proto *hup[HCI_UART_MAX_PROTO]; |
1da177e4 | 52 | |
4ee7ef19 | 53 | int hci_uart_register_proto(const struct hci_uart_proto *p) |
1da177e4 LT |
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 | |
01009eec MH |
63 | BT_INFO("HCI UART protocol %s registered", p->name); |
64 | ||
1da177e4 LT |
65 | return 0; |
66 | } | |
67 | ||
4ee7ef19 | 68 | int hci_uart_unregister_proto(const struct hci_uart_proto *p) |
1da177e4 LT |
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; | |
0372a662 | 77 | |
1da177e4 LT |
78 | return 0; |
79 | } | |
80 | ||
4ee7ef19 | 81 | static const struct hci_uart_proto *hci_uart_get_proto(unsigned int id) |
1da177e4 LT |
82 | { |
83 | if (id >= HCI_UART_MAX_PROTO) | |
84 | return NULL; | |
0372a662 | 85 | |
1da177e4 LT |
86 | return hup[id]; |
87 | } | |
88 | ||
89 | static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type) | |
90 | { | |
91 | struct hci_dev *hdev = hu->hdev; | |
0372a662 | 92 | |
1da177e4 LT |
93 | /* 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: | |
7f8f2729 | 104 | hdev->stat.sco_tx++; |
1da177e4 LT |
105 | break; |
106 | } | |
107 | } | |
108 | ||
109 | static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu) | |
110 | { | |
111 | struct sk_buff *skb = hu->tx_skb; | |
0372a662 | 112 | |
1da177e4 LT |
113 | if (!skb) |
114 | skb = hu->proto->dequeue(hu); | |
115 | else | |
116 | hu->tx_skb = NULL; | |
0372a662 | 117 | |
1da177e4 LT |
118 | return skb; |
119 | } | |
120 | ||
121 | int hci_uart_tx_wakeup(struct hci_uart *hu) | |
122 | { | |
1da177e4 LT |
123 | if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state)) { |
124 | set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); | |
125 | return 0; | |
126 | } | |
127 | ||
128 | BT_DBG(""); | |
129 | ||
da64c27d FB |
130 | schedule_work(&hu->write_work); |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | static void hci_uart_write_work(struct work_struct *work) | |
136 | { | |
137 | struct hci_uart *hu = container_of(work, struct hci_uart, write_work); | |
138 | struct tty_struct *tty = hu->tty; | |
139 | struct hci_dev *hdev = hu->hdev; | |
140 | struct sk_buff *skb; | |
141 | ||
142 | /* REVISIT: should we cope with bad skbs or ->write() returning | |
143 | * and error value ? | |
144 | */ | |
145 | ||
1da177e4 LT |
146 | restart: |
147 | clear_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); | |
148 | ||
149 | while ((skb = hci_uart_dequeue(hu))) { | |
150 | int len; | |
0372a662 | 151 | |
1da177e4 | 152 | set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); |
f34d7a5b | 153 | len = tty->ops->write(tty, skb->data, skb->len); |
1da177e4 LT |
154 | hdev->stat.byte_tx += len; |
155 | ||
156 | skb_pull(skb, len); | |
157 | if (skb->len) { | |
158 | hu->tx_skb = skb; | |
159 | break; | |
160 | } | |
0372a662 | 161 | |
0d48d939 | 162 | hci_uart_tx_complete(hu, bt_cb(skb)->pkt_type); |
1da177e4 | 163 | kfree_skb(skb); |
0372a662 MH |
164 | } |
165 | ||
1da177e4 LT |
166 | if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state)) |
167 | goto restart; | |
168 | ||
169 | clear_bit(HCI_UART_SENDING, &hu->tx_state); | |
1da177e4 LT |
170 | } |
171 | ||
9f2aee84 JH |
172 | static void hci_uart_init_work(struct work_struct *work) |
173 | { | |
174 | struct hci_uart *hu = container_of(work, struct hci_uart, init_ready); | |
175 | int err; | |
176 | ||
177 | if (!test_and_clear_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) | |
178 | return; | |
179 | ||
180 | err = hci_register_dev(hu->hdev); | |
181 | if (err < 0) { | |
182 | BT_ERR("Can't register HCI device"); | |
183 | hci_free_dev(hu->hdev); | |
184 | hu->hdev = NULL; | |
185 | hu->proto->close(hu); | |
186 | } | |
187 | ||
188 | set_bit(HCI_UART_REGISTERED, &hu->flags); | |
189 | } | |
190 | ||
191 | int hci_uart_init_ready(struct hci_uart *hu) | |
192 | { | |
193 | if (!test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) | |
194 | return -EALREADY; | |
195 | ||
196 | schedule_work(&hu->init_ready); | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
1da177e4 LT |
201 | /* ------- Interface to HCI layer ------ */ |
202 | /* Initialize device */ | |
203 | static int hci_uart_open(struct hci_dev *hdev) | |
204 | { | |
205 | BT_DBG("%s %p", hdev->name, hdev); | |
206 | ||
207 | /* Nothing to do for UART driver */ | |
208 | ||
209 | set_bit(HCI_RUNNING, &hdev->flags); | |
0372a662 | 210 | |
1da177e4 LT |
211 | return 0; |
212 | } | |
213 | ||
214 | /* Reset device */ | |
215 | static int hci_uart_flush(struct hci_dev *hdev) | |
216 | { | |
155961e8 | 217 | struct hci_uart *hu = hci_get_drvdata(hdev); |
1da177e4 LT |
218 | struct tty_struct *tty = hu->tty; |
219 | ||
220 | BT_DBG("hdev %p tty %p", hdev, tty); | |
221 | ||
222 | if (hu->tx_skb) { | |
223 | kfree_skb(hu->tx_skb); hu->tx_skb = NULL; | |
224 | } | |
225 | ||
226 | /* Flush any pending characters in the driver and discipline. */ | |
227 | tty_ldisc_flush(tty); | |
f34d7a5b | 228 | tty_driver_flush_buffer(tty); |
1da177e4 LT |
229 | |
230 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
231 | hu->proto->flush(hu); | |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
236 | /* Close device */ | |
237 | static int hci_uart_close(struct hci_dev *hdev) | |
238 | { | |
239 | BT_DBG("hdev %p", hdev); | |
240 | ||
241 | if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags)) | |
242 | return 0; | |
243 | ||
244 | hci_uart_flush(hdev); | |
3611f4d2 | 245 | hdev->flush = NULL; |
1da177e4 LT |
246 | return 0; |
247 | } | |
248 | ||
249 | /* Send frames from HCI layer */ | |
7bd8f09f | 250 | static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb) |
1da177e4 | 251 | { |
52bc423a | 252 | struct hci_uart *hu = hci_get_drvdata(hdev); |
1da177e4 LT |
253 | |
254 | if (!test_bit(HCI_RUNNING, &hdev->flags)) | |
255 | return -EBUSY; | |
256 | ||
0d48d939 | 257 | BT_DBG("%s: type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
1da177e4 LT |
258 | |
259 | hu->proto->enqueue(hu, skb); | |
260 | ||
261 | hci_uart_tx_wakeup(hu); | |
0372a662 | 262 | |
1da177e4 LT |
263 | return 0; |
264 | } | |
265 | ||
eb173809 LP |
266 | static int hci_uart_setup(struct hci_dev *hdev) |
267 | { | |
268 | struct hci_uart *hu = hci_get_drvdata(hdev); | |
fb2ce8d1 MH |
269 | struct hci_rp_read_local_version *ver; |
270 | struct sk_buff *skb; | |
eb173809 LP |
271 | |
272 | if (hu->proto->setup) | |
273 | return hu->proto->setup(hu); | |
274 | ||
fb2ce8d1 MH |
275 | if (!test_bit(HCI_UART_VND_DETECT, &hu->hdev_flags)) |
276 | return 0; | |
277 | ||
278 | skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL, | |
279 | HCI_INIT_TIMEOUT); | |
280 | if (IS_ERR(skb)) { | |
281 | BT_ERR("%s: Reading local version information failed (%ld)", | |
282 | hdev->name, PTR_ERR(skb)); | |
283 | return 0; | |
284 | } | |
285 | ||
286 | if (skb->len != sizeof(*ver)) { | |
287 | BT_ERR("%s: Event length mismatch for version information", | |
288 | hdev->name); | |
289 | goto done; | |
290 | } | |
291 | ||
292 | ver = (struct hci_rp_read_local_version *)skb->data; | |
293 | ||
294 | switch (le16_to_cpu(ver->manufacturer)) { | |
16e3887f MH |
295 | #ifdef CONFIG_BT_HCIUART_INTEL |
296 | case 2: | |
297 | hdev->set_bdaddr = intel_set_bdaddr; | |
298 | break; | |
e9a2dd26 MH |
299 | #endif |
300 | #ifdef CONFIG_BT_HCIUART_BCM | |
301 | case 15: | |
302 | hdev->set_bdaddr = bcm_set_bdaddr; | |
303 | break; | |
16e3887f | 304 | #endif |
fb2ce8d1 MH |
305 | } |
306 | ||
307 | done: | |
308 | kfree_skb(skb); | |
eb173809 LP |
309 | return 0; |
310 | } | |
311 | ||
1da177e4 LT |
312 | /* ------ LDISC part ------ */ |
313 | /* hci_uart_tty_open | |
1687dfc3 | 314 | * |
1da177e4 LT |
315 | * Called when line discipline changed to HCI_UART. |
316 | * | |
317 | * Arguments: | |
318 | * tty pointer to tty info structure | |
1687dfc3 | 319 | * Return Value: |
1da177e4 LT |
320 | * 0 if success, otherwise error code |
321 | */ | |
322 | static int hci_uart_tty_open(struct tty_struct *tty) | |
323 | { | |
f327b340 | 324 | struct hci_uart *hu; |
1da177e4 LT |
325 | |
326 | BT_DBG("tty %p", tty); | |
327 | ||
c19483cc AC |
328 | /* Error if the tty has no write op instead of leaving an exploitable |
329 | hole */ | |
330 | if (tty->ops->write == NULL) | |
331 | return -EOPNOTSUPP; | |
332 | ||
a08b15e6 VI |
333 | hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL); |
334 | if (!hu) { | |
7785162c | 335 | BT_ERR("Can't allocate control structure"); |
1da177e4 LT |
336 | return -ENFILE; |
337 | } | |
0372a662 | 338 | |
1da177e4 LT |
339 | tty->disc_data = hu; |
340 | hu->tty = tty; | |
33f0f88f | 341 | tty->receive_room = 65536; |
1da177e4 | 342 | |
9f2aee84 | 343 | INIT_WORK(&hu->init_ready, hci_uart_init_work); |
da64c27d | 344 | INIT_WORK(&hu->write_work, hci_uart_write_work); |
9f2aee84 | 345 | |
1da177e4 LT |
346 | spin_lock_init(&hu->rx_lock); |
347 | ||
348 | /* Flush any pending characters in the driver and line discipline. */ | |
0372a662 | 349 | |
1da177e4 LT |
350 | /* FIXME: why is this needed. Note don't use ldisc_ref here as the |
351 | open path is before the ldisc is referencable */ | |
0372a662 | 352 | |
c65c9bc3 AC |
353 | if (tty->ldisc->ops->flush_buffer) |
354 | tty->ldisc->ops->flush_buffer(tty); | |
f34d7a5b | 355 | tty_driver_flush_buffer(tty); |
1da177e4 LT |
356 | |
357 | return 0; | |
358 | } | |
359 | ||
360 | /* hci_uart_tty_close() | |
361 | * | |
362 | * Called when the line discipline is changed to something | |
363 | * else, the tty is closed, or the tty detects a hangup. | |
364 | */ | |
365 | static void hci_uart_tty_close(struct tty_struct *tty) | |
366 | { | |
dfe19d28 | 367 | struct hci_uart *hu = tty->disc_data; |
dac670b9 | 368 | struct hci_dev *hdev; |
1da177e4 LT |
369 | |
370 | BT_DBG("tty %p", tty); | |
371 | ||
372 | /* Detach from the tty */ | |
373 | tty->disc_data = NULL; | |
374 | ||
dac670b9 JH |
375 | if (!hu) |
376 | return; | |
22ad4203 | 377 | |
dac670b9 JH |
378 | hdev = hu->hdev; |
379 | if (hdev) | |
380 | hci_uart_close(hdev); | |
1da177e4 | 381 | |
da64c27d FB |
382 | cancel_work_sync(&hu->write_work); |
383 | ||
dac670b9 JH |
384 | if (test_and_clear_bit(HCI_UART_PROTO_SET, &hu->flags)) { |
385 | if (hdev) { | |
9f2aee84 JH |
386 | if (test_bit(HCI_UART_REGISTERED, &hu->flags)) |
387 | hci_unregister_dev(hdev); | |
dac670b9 | 388 | hci_free_dev(hdev); |
1da177e4 | 389 | } |
dac670b9 | 390 | hu->proto->close(hu); |
1da177e4 | 391 | } |
dac670b9 JH |
392 | |
393 | kfree(hu); | |
1da177e4 LT |
394 | } |
395 | ||
396 | /* hci_uart_tty_wakeup() | |
397 | * | |
398 | * Callback for transmit wakeup. Called when low level | |
399 | * device driver can accept more send data. | |
400 | * | |
401 | * Arguments: tty pointer to associated tty instance data | |
402 | * Return Value: None | |
403 | */ | |
404 | static void hci_uart_tty_wakeup(struct tty_struct *tty) | |
405 | { | |
dfe19d28 | 406 | struct hci_uart *hu = tty->disc_data; |
1da177e4 LT |
407 | |
408 | BT_DBG(""); | |
409 | ||
410 | if (!hu) | |
411 | return; | |
412 | ||
413 | clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); | |
414 | ||
415 | if (tty != hu->tty) | |
416 | return; | |
417 | ||
418 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
419 | hci_uart_tx_wakeup(hu); | |
420 | } | |
421 | ||
1da177e4 | 422 | /* hci_uart_tty_receive() |
1687dfc3 | 423 | * |
1da177e4 LT |
424 | * Called by tty low level driver when receive data is |
425 | * available. | |
1687dfc3 | 426 | * |
1da177e4 LT |
427 | * Arguments: tty pointer to tty isntance data |
428 | * data pointer to received data | |
429 | * flags pointer to flags for data | |
430 | * count count of received data in bytes | |
1687dfc3 | 431 | * |
55db4c64 | 432 | * Return Value: None |
1da177e4 | 433 | */ |
facf5225 MH |
434 | static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data, |
435 | char *flags, int count) | |
1da177e4 | 436 | { |
dfe19d28 | 437 | struct hci_uart *hu = tty->disc_data; |
0372a662 | 438 | |
1da177e4 | 439 | if (!hu || tty != hu->tty) |
55db4c64 | 440 | return; |
1da177e4 LT |
441 | |
442 | if (!test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
55db4c64 | 443 | return; |
0372a662 | 444 | |
1da177e4 | 445 | spin_lock(&hu->rx_lock); |
9d1c40eb | 446 | hu->proto->recv(hu, data, count); |
788f0923 CP |
447 | |
448 | if (hu->hdev) | |
449 | hu->hdev->stat.byte_rx += count; | |
450 | ||
1da177e4 LT |
451 | spin_unlock(&hu->rx_lock); |
452 | ||
39c2e60f | 453 | tty_unthrottle(tty); |
1da177e4 LT |
454 | } |
455 | ||
456 | static int hci_uart_register_dev(struct hci_uart *hu) | |
457 | { | |
458 | struct hci_dev *hdev; | |
459 | ||
460 | BT_DBG(""); | |
461 | ||
462 | /* Initialize and register HCI device */ | |
463 | hdev = hci_alloc_dev(); | |
464 | if (!hdev) { | |
465 | BT_ERR("Can't allocate HCI device"); | |
466 | return -ENOMEM; | |
467 | } | |
468 | ||
469 | hu->hdev = hdev; | |
470 | ||
c13854ce | 471 | hdev->bus = HCI_UART; |
155961e8 | 472 | hci_set_drvdata(hdev, hu); |
1da177e4 LT |
473 | |
474 | hdev->open = hci_uart_open; | |
475 | hdev->close = hci_uart_close; | |
476 | hdev->flush = hci_uart_flush; | |
477 | hdev->send = hci_uart_send_frame; | |
eb173809 | 478 | hdev->setup = hci_uart_setup; |
6935e0f5 | 479 | SET_HCIDEV_DEV(hdev, hu->tty->dev); |
1da177e4 | 480 | |
63c7d09c JH |
481 | if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags)) |
482 | set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks); | |
483 | ||
6afd04ad MH |
484 | if (test_bit(HCI_UART_EXT_CONFIG, &hu->hdev_flags)) |
485 | set_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks); | |
486 | ||
a55e1f38 | 487 | if (!test_bit(HCI_UART_RESET_ON_INIT, &hu->hdev_flags)) |
a6c511c6 | 488 | set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks); |
a55e1f38 | 489 | |
8a7a3fd6 MH |
490 | if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags)) |
491 | hdev->dev_type = HCI_AMP; | |
492 | else | |
493 | hdev->dev_type = HCI_BREDR; | |
494 | ||
9f2aee84 JH |
495 | if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) |
496 | return 0; | |
497 | ||
1da177e4 LT |
498 | if (hci_register_dev(hdev) < 0) { |
499 | BT_ERR("Can't register HCI device"); | |
500 | hci_free_dev(hdev); | |
501 | return -ENODEV; | |
502 | } | |
503 | ||
9f2aee84 JH |
504 | set_bit(HCI_UART_REGISTERED, &hu->flags); |
505 | ||
1da177e4 LT |
506 | return 0; |
507 | } | |
508 | ||
509 | static int hci_uart_set_proto(struct hci_uart *hu, int id) | |
510 | { | |
4ee7ef19 | 511 | const struct hci_uart_proto *p; |
0372a662 MH |
512 | int err; |
513 | ||
1da177e4 LT |
514 | p = hci_uart_get_proto(id); |
515 | if (!p) | |
516 | return -EPROTONOSUPPORT; | |
517 | ||
518 | err = p->open(hu); | |
519 | if (err) | |
520 | return err; | |
521 | ||
522 | hu->proto = p; | |
523 | ||
524 | err = hci_uart_register_dev(hu); | |
525 | if (err) { | |
526 | p->close(hu); | |
527 | return err; | |
528 | } | |
0372a662 | 529 | |
1da177e4 LT |
530 | return 0; |
531 | } | |
532 | ||
bb72bd68 MH |
533 | static int hci_uart_set_flags(struct hci_uart *hu, unsigned long flags) |
534 | { | |
535 | unsigned long valid_flags = BIT(HCI_UART_RAW_DEVICE) | | |
536 | BIT(HCI_UART_RESET_ON_INIT) | | |
537 | BIT(HCI_UART_CREATE_AMP) | | |
6afd04ad | 538 | BIT(HCI_UART_INIT_PENDING) | |
fb2ce8d1 MH |
539 | BIT(HCI_UART_EXT_CONFIG) | |
540 | BIT(HCI_UART_VND_DETECT); | |
bb72bd68 | 541 | |
41533fe5 | 542 | if (flags & ~valid_flags) |
bb72bd68 MH |
543 | return -EINVAL; |
544 | ||
545 | hu->hdev_flags = flags; | |
546 | ||
547 | return 0; | |
548 | } | |
549 | ||
1da177e4 LT |
550 | /* hci_uart_tty_ioctl() |
551 | * | |
552 | * Process IOCTL system call for the tty device. | |
553 | * | |
554 | * Arguments: | |
555 | * | |
556 | * tty pointer to tty instance data | |
557 | * file pointer to open file object for device | |
558 | * cmd IOCTL command code | |
559 | * arg argument for IOCTL call (cmd dependent) | |
560 | * | |
561 | * Return Value: Command dependent | |
562 | */ | |
facf5225 MH |
563 | static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file *file, |
564 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 565 | { |
dfe19d28 | 566 | struct hci_uart *hu = tty->disc_data; |
1da177e4 LT |
567 | int err = 0; |
568 | ||
569 | BT_DBG(""); | |
570 | ||
571 | /* Verify the status of the device */ | |
572 | if (!hu) | |
573 | return -EBADF; | |
574 | ||
575 | switch (cmd) { | |
576 | case HCIUARTSETPROTO: | |
577 | if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) { | |
578 | err = hci_uart_set_proto(hu, arg); | |
579 | if (err) { | |
580 | clear_bit(HCI_UART_PROTO_SET, &hu->flags); | |
581 | return err; | |
582 | } | |
0372a662 | 583 | } else |
1da177e4 | 584 | return -EBUSY; |
c33be3c3 | 585 | break; |
1da177e4 LT |
586 | |
587 | case HCIUARTGETPROTO: | |
588 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
589 | return hu->proto->id; | |
590 | return -EUNATCH; | |
0372a662 | 591 | |
d2158744 | 592 | case HCIUARTGETDEVICE: |
c7e0c141 | 593 | if (test_bit(HCI_UART_REGISTERED, &hu->flags)) |
d2158744 MH |
594 | return hu->hdev->id; |
595 | return -EUNATCH; | |
596 | ||
63c7d09c JH |
597 | case HCIUARTSETFLAGS: |
598 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
599 | return -EBUSY; | |
bb72bd68 MH |
600 | err = hci_uart_set_flags(hu, arg); |
601 | if (err) | |
602 | return err; | |
63c7d09c JH |
603 | break; |
604 | ||
605 | case HCIUARTGETFLAGS: | |
606 | return hu->hdev_flags; | |
607 | ||
1da177e4 | 608 | default: |
47afa7a5 | 609 | err = n_tty_ioctl_helper(tty, file, cmd, arg); |
1da177e4 | 610 | break; |
a20890d0 | 611 | } |
1da177e4 LT |
612 | |
613 | return err; | |
614 | } | |
615 | ||
616 | /* | |
617 | * We don't provide read/write/poll interface for user space. | |
618 | */ | |
0372a662 | 619 | static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file, |
facf5225 | 620 | unsigned char __user *buf, size_t nr) |
1da177e4 LT |
621 | { |
622 | return 0; | |
623 | } | |
0372a662 MH |
624 | |
625 | static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file, | |
facf5225 | 626 | const unsigned char *data, size_t count) |
1da177e4 LT |
627 | { |
628 | return 0; | |
629 | } | |
0372a662 MH |
630 | |
631 | static unsigned int hci_uart_tty_poll(struct tty_struct *tty, | |
facf5225 | 632 | struct file *filp, poll_table *wait) |
1da177e4 LT |
633 | { |
634 | return 0; | |
635 | } | |
636 | ||
1da177e4 LT |
637 | static int __init hci_uart_init(void) |
638 | { | |
a352def2 | 639 | static struct tty_ldisc_ops hci_uart_ldisc; |
1da177e4 LT |
640 | int err; |
641 | ||
642 | BT_INFO("HCI UART driver ver %s", VERSION); | |
643 | ||
644 | /* Register the tty discipline */ | |
645 | ||
646 | memset(&hci_uart_ldisc, 0, sizeof (hci_uart_ldisc)); | |
0372a662 MH |
647 | hci_uart_ldisc.magic = TTY_LDISC_MAGIC; |
648 | hci_uart_ldisc.name = "n_hci"; | |
649 | hci_uart_ldisc.open = hci_uart_tty_open; | |
650 | hci_uart_ldisc.close = hci_uart_tty_close; | |
651 | hci_uart_ldisc.read = hci_uart_tty_read; | |
652 | hci_uart_ldisc.write = hci_uart_tty_write; | |
653 | hci_uart_ldisc.ioctl = hci_uart_tty_ioctl; | |
654 | hci_uart_ldisc.poll = hci_uart_tty_poll; | |
0372a662 MH |
655 | hci_uart_ldisc.receive_buf = hci_uart_tty_receive; |
656 | hci_uart_ldisc.write_wakeup = hci_uart_tty_wakeup; | |
657 | hci_uart_ldisc.owner = THIS_MODULE; | |
1da177e4 | 658 | |
a08b15e6 VI |
659 | err = tty_register_ldisc(N_HCI, &hci_uart_ldisc); |
660 | if (err) { | |
1da177e4 LT |
661 | BT_ERR("HCI line discipline registration failed. (%d)", err); |
662 | return err; | |
663 | } | |
664 | ||
665 | #ifdef CONFIG_BT_HCIUART_H4 | |
666 | h4_init(); | |
667 | #endif | |
668 | #ifdef CONFIG_BT_HCIUART_BCSP | |
669 | bcsp_init(); | |
670 | #endif | |
166d2f6a OBC |
671 | #ifdef CONFIG_BT_HCIUART_LL |
672 | ll_init(); | |
673 | #endif | |
b3190df6 SS |
674 | #ifdef CONFIG_BT_HCIUART_ATH3K |
675 | ath_init(); | |
676 | #endif | |
7dec65c8 JH |
677 | #ifdef CONFIG_BT_HCIUART_3WIRE |
678 | h5_init(); | |
679 | #endif | |
166d2f6a | 680 | |
1da177e4 LT |
681 | return 0; |
682 | } | |
683 | ||
684 | static void __exit hci_uart_exit(void) | |
685 | { | |
686 | int err; | |
687 | ||
688 | #ifdef CONFIG_BT_HCIUART_H4 | |
689 | h4_deinit(); | |
690 | #endif | |
691 | #ifdef CONFIG_BT_HCIUART_BCSP | |
692 | bcsp_deinit(); | |
693 | #endif | |
166d2f6a OBC |
694 | #ifdef CONFIG_BT_HCIUART_LL |
695 | ll_deinit(); | |
696 | #endif | |
b3190df6 SS |
697 | #ifdef CONFIG_BT_HCIUART_ATH3K |
698 | ath_deinit(); | |
699 | #endif | |
7dec65c8 JH |
700 | #ifdef CONFIG_BT_HCIUART_3WIRE |
701 | h5_deinit(); | |
702 | #endif | |
1da177e4 LT |
703 | |
704 | /* Release tty registration of line discipline */ | |
a08b15e6 VI |
705 | err = tty_unregister_ldisc(N_HCI); |
706 | if (err) | |
1da177e4 LT |
707 | BT_ERR("Can't unregister HCI line discipline (%d)", err); |
708 | } | |
709 | ||
710 | module_init(hci_uart_init); | |
711 | module_exit(hci_uart_exit); | |
712 | ||
63fbd24e | 713 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
714 | MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION); |
715 | MODULE_VERSION(VERSION); | |
716 | MODULE_LICENSE("GPL"); | |
717 | MODULE_ALIAS_LDISC(N_HCI); |