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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> | |
18aeb444 | 43 | #include <linux/firmware.h> |
1da177e4 LT |
44 | |
45 | #include <net/bluetooth/bluetooth.h> | |
46 | #include <net/bluetooth/hci_core.h> | |
47 | ||
bca03c95 | 48 | #include "btintel.h" |
3e0ac12a | 49 | #include "btbcm.h" |
1da177e4 LT |
50 | #include "hci_uart.h" |
51 | ||
788a6756 | 52 | #define VERSION "2.3" |
0372a662 | 53 | |
4ee7ef19 | 54 | static const struct hci_uart_proto *hup[HCI_UART_MAX_PROTO]; |
1da177e4 | 55 | |
4ee7ef19 | 56 | int hci_uart_register_proto(const struct hci_uart_proto *p) |
1da177e4 LT |
57 | { |
58 | if (p->id >= HCI_UART_MAX_PROTO) | |
59 | return -EINVAL; | |
60 | ||
61 | if (hup[p->id]) | |
62 | return -EEXIST; | |
63 | ||
64 | hup[p->id] = p; | |
0372a662 | 65 | |
01009eec MH |
66 | BT_INFO("HCI UART protocol %s registered", p->name); |
67 | ||
1da177e4 LT |
68 | return 0; |
69 | } | |
70 | ||
4ee7ef19 | 71 | int hci_uart_unregister_proto(const struct hci_uart_proto *p) |
1da177e4 LT |
72 | { |
73 | if (p->id >= HCI_UART_MAX_PROTO) | |
74 | return -EINVAL; | |
75 | ||
76 | if (!hup[p->id]) | |
77 | return -EINVAL; | |
78 | ||
79 | hup[p->id] = NULL; | |
0372a662 | 80 | |
1da177e4 LT |
81 | return 0; |
82 | } | |
83 | ||
4ee7ef19 | 84 | static const struct hci_uart_proto *hci_uart_get_proto(unsigned int id) |
1da177e4 LT |
85 | { |
86 | if (id >= HCI_UART_MAX_PROTO) | |
87 | return NULL; | |
0372a662 | 88 | |
1da177e4 LT |
89 | return hup[id]; |
90 | } | |
91 | ||
92 | static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type) | |
93 | { | |
94 | struct hci_dev *hdev = hu->hdev; | |
0372a662 | 95 | |
1da177e4 LT |
96 | /* Update HCI stat counters */ |
97 | switch (pkt_type) { | |
98 | case HCI_COMMAND_PKT: | |
99 | hdev->stat.cmd_tx++; | |
100 | break; | |
101 | ||
102 | case HCI_ACLDATA_PKT: | |
103 | hdev->stat.acl_tx++; | |
104 | break; | |
105 | ||
106 | case HCI_SCODATA_PKT: | |
7f8f2729 | 107 | hdev->stat.sco_tx++; |
1da177e4 LT |
108 | break; |
109 | } | |
110 | } | |
111 | ||
112 | static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu) | |
113 | { | |
114 | struct sk_buff *skb = hu->tx_skb; | |
0372a662 | 115 | |
1da177e4 LT |
116 | if (!skb) |
117 | skb = hu->proto->dequeue(hu); | |
118 | else | |
119 | hu->tx_skb = NULL; | |
0372a662 | 120 | |
1da177e4 LT |
121 | return skb; |
122 | } | |
123 | ||
124 | int hci_uart_tx_wakeup(struct hci_uart *hu) | |
125 | { | |
1da177e4 LT |
126 | if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state)) { |
127 | set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); | |
128 | return 0; | |
129 | } | |
130 | ||
131 | BT_DBG(""); | |
132 | ||
da64c27d FB |
133 | schedule_work(&hu->write_work); |
134 | ||
135 | return 0; | |
136 | } | |
081f36a8 | 137 | EXPORT_SYMBOL_GPL(hci_uart_tx_wakeup); |
da64c27d FB |
138 | |
139 | static void hci_uart_write_work(struct work_struct *work) | |
140 | { | |
141 | struct hci_uart *hu = container_of(work, struct hci_uart, write_work); | |
142 | struct tty_struct *tty = hu->tty; | |
143 | struct hci_dev *hdev = hu->hdev; | |
144 | struct sk_buff *skb; | |
145 | ||
146 | /* REVISIT: should we cope with bad skbs or ->write() returning | |
147 | * and error value ? | |
148 | */ | |
149 | ||
1da177e4 LT |
150 | restart: |
151 | clear_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); | |
152 | ||
153 | while ((skb = hci_uart_dequeue(hu))) { | |
154 | int len; | |
0372a662 | 155 | |
1da177e4 | 156 | set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); |
f34d7a5b | 157 | len = tty->ops->write(tty, skb->data, skb->len); |
1da177e4 LT |
158 | hdev->stat.byte_tx += len; |
159 | ||
160 | skb_pull(skb, len); | |
161 | if (skb->len) { | |
162 | hu->tx_skb = skb; | |
163 | break; | |
164 | } | |
0372a662 | 165 | |
618e8bc2 | 166 | hci_uart_tx_complete(hu, hci_skb_pkt_type(skb)); |
1da177e4 | 167 | kfree_skb(skb); |
0372a662 MH |
168 | } |
169 | ||
1da177e4 LT |
170 | if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state)) |
171 | goto restart; | |
172 | ||
173 | clear_bit(HCI_UART_SENDING, &hu->tx_state); | |
1da177e4 LT |
174 | } |
175 | ||
9f2aee84 JH |
176 | static void hci_uart_init_work(struct work_struct *work) |
177 | { | |
178 | struct hci_uart *hu = container_of(work, struct hci_uart, init_ready); | |
179 | int err; | |
a225b8c7 | 180 | struct hci_dev *hdev; |
9f2aee84 JH |
181 | |
182 | if (!test_and_clear_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) | |
183 | return; | |
184 | ||
185 | err = hci_register_dev(hu->hdev); | |
186 | if (err < 0) { | |
187 | BT_ERR("Can't register HCI device"); | |
a225b8c7 | 188 | hdev = hu->hdev; |
9f2aee84 | 189 | hu->hdev = NULL; |
a225b8c7 | 190 | hci_free_dev(hdev); |
d160b74d | 191 | clear_bit(HCI_UART_PROTO_READY, &hu->flags); |
9f2aee84 | 192 | hu->proto->close(hu); |
cb926520 | 193 | return; |
9f2aee84 JH |
194 | } |
195 | ||
196 | set_bit(HCI_UART_REGISTERED, &hu->flags); | |
197 | } | |
198 | ||
199 | int hci_uart_init_ready(struct hci_uart *hu) | |
200 | { | |
201 | if (!test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) | |
202 | return -EALREADY; | |
203 | ||
204 | schedule_work(&hu->init_ready); | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
1da177e4 LT |
209 | /* ------- Interface to HCI layer ------ */ |
210 | /* Initialize device */ | |
211 | static int hci_uart_open(struct hci_dev *hdev) | |
212 | { | |
213 | BT_DBG("%s %p", hdev->name, hdev); | |
214 | ||
215 | /* Nothing to do for UART driver */ | |
1da177e4 LT |
216 | return 0; |
217 | } | |
218 | ||
219 | /* Reset device */ | |
220 | static int hci_uart_flush(struct hci_dev *hdev) | |
221 | { | |
155961e8 | 222 | struct hci_uart *hu = hci_get_drvdata(hdev); |
1da177e4 LT |
223 | struct tty_struct *tty = hu->tty; |
224 | ||
225 | BT_DBG("hdev %p tty %p", hdev, tty); | |
226 | ||
227 | if (hu->tx_skb) { | |
228 | kfree_skb(hu->tx_skb); hu->tx_skb = NULL; | |
229 | } | |
230 | ||
231 | /* Flush any pending characters in the driver and discipline. */ | |
232 | tty_ldisc_flush(tty); | |
f34d7a5b | 233 | tty_driver_flush_buffer(tty); |
1da177e4 | 234 | |
84cb3df0 | 235 | if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) |
1da177e4 LT |
236 | hu->proto->flush(hu); |
237 | ||
238 | return 0; | |
239 | } | |
240 | ||
241 | /* Close device */ | |
242 | static int hci_uart_close(struct hci_dev *hdev) | |
243 | { | |
244 | BT_DBG("hdev %p", hdev); | |
245 | ||
1da177e4 | 246 | hci_uart_flush(hdev); |
3611f4d2 | 247 | hdev->flush = NULL; |
1da177e4 LT |
248 | return 0; |
249 | } | |
250 | ||
251 | /* Send frames from HCI layer */ | |
7bd8f09f | 252 | static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb) |
1da177e4 | 253 | { |
52bc423a | 254 | struct hci_uart *hu = hci_get_drvdata(hdev); |
1da177e4 | 255 | |
618e8bc2 MH |
256 | BT_DBG("%s: type %d len %d", hdev->name, hci_skb_pkt_type(skb), |
257 | 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 | ||
2a973dfa IF |
266 | /* Flow control or un-flow control the device */ |
267 | void hci_uart_set_flow_control(struct hci_uart *hu, bool enable) | |
268 | { | |
269 | struct tty_struct *tty = hu->tty; | |
270 | struct ktermios ktermios; | |
271 | int status; | |
272 | unsigned int set = 0; | |
273 | unsigned int clear = 0; | |
274 | ||
275 | if (enable) { | |
276 | /* Disable hardware flow control */ | |
277 | ktermios = tty->termios; | |
278 | ktermios.c_cflag &= ~CRTSCTS; | |
279 | status = tty_set_termios(tty, &ktermios); | |
280 | BT_DBG("Disabling hardware flow control: %s", | |
281 | status ? "failed" : "success"); | |
282 | ||
283 | /* Clear RTS to prevent the device from sending */ | |
284 | /* Most UARTs need OUT2 to enable interrupts */ | |
285 | status = tty->driver->ops->tiocmget(tty); | |
286 | BT_DBG("Current tiocm 0x%x", status); | |
287 | ||
288 | set &= ~(TIOCM_OUT2 | TIOCM_RTS); | |
289 | clear = ~set; | |
290 | set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | | |
291 | TIOCM_OUT2 | TIOCM_LOOP; | |
292 | clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | | |
293 | TIOCM_OUT2 | TIOCM_LOOP; | |
294 | status = tty->driver->ops->tiocmset(tty, set, clear); | |
295 | BT_DBG("Clearing RTS: %s", status ? "failed" : "success"); | |
296 | } else { | |
297 | /* Set RTS to allow the device to send again */ | |
298 | status = tty->driver->ops->tiocmget(tty); | |
299 | BT_DBG("Current tiocm 0x%x", status); | |
300 | ||
301 | set |= (TIOCM_OUT2 | TIOCM_RTS); | |
302 | clear = ~set; | |
303 | set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | | |
304 | TIOCM_OUT2 | TIOCM_LOOP; | |
305 | clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | | |
306 | TIOCM_OUT2 | TIOCM_LOOP; | |
307 | status = tty->driver->ops->tiocmset(tty, set, clear); | |
308 | BT_DBG("Setting RTS: %s", status ? "failed" : "success"); | |
309 | ||
310 | /* Re-enable hardware flow control */ | |
311 | ktermios = tty->termios; | |
312 | ktermios.c_cflag |= CRTSCTS; | |
313 | status = tty_set_termios(tty, &ktermios); | |
314 | BT_DBG("Enabling hardware flow control: %s", | |
315 | status ? "failed" : "success"); | |
316 | } | |
317 | } | |
318 | ||
319 | void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed, | |
320 | unsigned int oper_speed) | |
321 | { | |
322 | hu->init_speed = init_speed; | |
323 | hu->oper_speed = oper_speed; | |
324 | } | |
325 | ||
7721383f FD |
326 | void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed) |
327 | { | |
328 | struct tty_struct *tty = hu->tty; | |
329 | struct ktermios ktermios; | |
330 | ||
331 | ktermios = tty->termios; | |
332 | ktermios.c_cflag &= ~CBAUD; | |
7721383f FD |
333 | tty_termios_encode_baud_rate(&ktermios, speed, speed); |
334 | ||
335 | /* tty_set_termios() return not checked as it is always 0 */ | |
336 | tty_set_termios(tty, &ktermios); | |
337 | ||
2a973dfa IF |
338 | BT_DBG("%s: New tty speeds: %d/%d", hu->hdev->name, |
339 | tty->termios.c_ispeed, tty->termios.c_ospeed); | |
7721383f FD |
340 | } |
341 | ||
eb173809 LP |
342 | static int hci_uart_setup(struct hci_dev *hdev) |
343 | { | |
344 | struct hci_uart *hu = hci_get_drvdata(hdev); | |
fb2ce8d1 MH |
345 | struct hci_rp_read_local_version *ver; |
346 | struct sk_buff *skb; | |
2a973dfa | 347 | unsigned int speed; |
7721383f FD |
348 | int err; |
349 | ||
2a973dfa | 350 | /* Init speed if any */ |
960ef1d7 | 351 | if (hu->init_speed) |
2a973dfa | 352 | speed = hu->init_speed; |
960ef1d7 FD |
353 | else if (hu->proto->init_speed) |
354 | speed = hu->proto->init_speed; | |
2a973dfa IF |
355 | else |
356 | speed = 0; | |
357 | ||
358 | if (speed) | |
359 | hci_uart_set_baudrate(hu, speed); | |
360 | ||
361 | /* Operational speed if any */ | |
960ef1d7 | 362 | if (hu->oper_speed) |
2a973dfa | 363 | speed = hu->oper_speed; |
960ef1d7 FD |
364 | else if (hu->proto->oper_speed) |
365 | speed = hu->proto->oper_speed; | |
2a973dfa IF |
366 | else |
367 | speed = 0; | |
7721383f | 368 | |
2a973dfa IF |
369 | if (hu->proto->set_baudrate && speed) { |
370 | err = hu->proto->set_baudrate(hu, speed); | |
7721383f | 371 | if (!err) |
2a973dfa | 372 | hci_uart_set_baudrate(hu, speed); |
7721383f | 373 | } |
eb173809 LP |
374 | |
375 | if (hu->proto->setup) | |
376 | return hu->proto->setup(hu); | |
377 | ||
fb2ce8d1 MH |
378 | if (!test_bit(HCI_UART_VND_DETECT, &hu->hdev_flags)) |
379 | return 0; | |
380 | ||
381 | skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL, | |
382 | HCI_INIT_TIMEOUT); | |
383 | if (IS_ERR(skb)) { | |
384 | BT_ERR("%s: Reading local version information failed (%ld)", | |
385 | hdev->name, PTR_ERR(skb)); | |
386 | return 0; | |
387 | } | |
388 | ||
389 | if (skb->len != sizeof(*ver)) { | |
390 | BT_ERR("%s: Event length mismatch for version information", | |
391 | hdev->name); | |
392 | goto done; | |
393 | } | |
394 | ||
395 | ver = (struct hci_rp_read_local_version *)skb->data; | |
396 | ||
397 | switch (le16_to_cpu(ver->manufacturer)) { | |
16e3887f MH |
398 | #ifdef CONFIG_BT_HCIUART_INTEL |
399 | case 2: | |
bca03c95 MH |
400 | hdev->set_bdaddr = btintel_set_bdaddr; |
401 | btintel_check_bdaddr(hdev); | |
16e3887f | 402 | break; |
e9a2dd26 MH |
403 | #endif |
404 | #ifdef CONFIG_BT_HCIUART_BCM | |
405 | case 15: | |
3e0ac12a MH |
406 | hdev->set_bdaddr = btbcm_set_bdaddr; |
407 | btbcm_check_bdaddr(hdev); | |
e9a2dd26 | 408 | break; |
16e3887f | 409 | #endif |
fb2ce8d1 MH |
410 | } |
411 | ||
412 | done: | |
413 | kfree_skb(skb); | |
eb173809 LP |
414 | return 0; |
415 | } | |
416 | ||
1da177e4 LT |
417 | /* ------ LDISC part ------ */ |
418 | /* hci_uart_tty_open | |
1687dfc3 | 419 | * |
1da177e4 LT |
420 | * Called when line discipline changed to HCI_UART. |
421 | * | |
422 | * Arguments: | |
423 | * tty pointer to tty info structure | |
1687dfc3 | 424 | * Return Value: |
1da177e4 LT |
425 | * 0 if success, otherwise error code |
426 | */ | |
427 | static int hci_uart_tty_open(struct tty_struct *tty) | |
428 | { | |
f327b340 | 429 | struct hci_uart *hu; |
1da177e4 LT |
430 | |
431 | BT_DBG("tty %p", tty); | |
432 | ||
c19483cc AC |
433 | /* Error if the tty has no write op instead of leaving an exploitable |
434 | hole */ | |
435 | if (tty->ops->write == NULL) | |
436 | return -EOPNOTSUPP; | |
437 | ||
a08b15e6 VI |
438 | hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL); |
439 | if (!hu) { | |
7785162c | 440 | BT_ERR("Can't allocate control structure"); |
1da177e4 LT |
441 | return -ENFILE; |
442 | } | |
0372a662 | 443 | |
1da177e4 LT |
444 | tty->disc_data = hu; |
445 | hu->tty = tty; | |
33f0f88f | 446 | tty->receive_room = 65536; |
1da177e4 | 447 | |
aeac3014 SR |
448 | /* disable alignment support by default */ |
449 | hu->alignment = 1; | |
450 | hu->padding = 0; | |
451 | ||
9f2aee84 | 452 | INIT_WORK(&hu->init_ready, hci_uart_init_work); |
da64c27d | 453 | INIT_WORK(&hu->write_work, hci_uart_write_work); |
9f2aee84 | 454 | |
e6e981c7 | 455 | /* Flush any pending characters in the driver */ |
f34d7a5b | 456 | tty_driver_flush_buffer(tty); |
1da177e4 LT |
457 | |
458 | return 0; | |
459 | } | |
460 | ||
461 | /* hci_uart_tty_close() | |
462 | * | |
463 | * Called when the line discipline is changed to something | |
464 | * else, the tty is closed, or the tty detects a hangup. | |
465 | */ | |
466 | static void hci_uart_tty_close(struct tty_struct *tty) | |
467 | { | |
dfe19d28 | 468 | struct hci_uart *hu = tty->disc_data; |
dac670b9 | 469 | struct hci_dev *hdev; |
1da177e4 LT |
470 | |
471 | BT_DBG("tty %p", tty); | |
472 | ||
473 | /* Detach from the tty */ | |
474 | tty->disc_data = NULL; | |
475 | ||
dac670b9 JH |
476 | if (!hu) |
477 | return; | |
22ad4203 | 478 | |
dac670b9 JH |
479 | hdev = hu->hdev; |
480 | if (hdev) | |
481 | hci_uart_close(hdev); | |
1da177e4 | 482 | |
da64c27d FB |
483 | cancel_work_sync(&hu->write_work); |
484 | ||
84cb3df0 | 485 | if (test_and_clear_bit(HCI_UART_PROTO_READY, &hu->flags)) { |
dac670b9 | 486 | if (hdev) { |
9f2aee84 JH |
487 | if (test_bit(HCI_UART_REGISTERED, &hu->flags)) |
488 | hci_unregister_dev(hdev); | |
dac670b9 | 489 | hci_free_dev(hdev); |
1da177e4 | 490 | } |
dac670b9 | 491 | hu->proto->close(hu); |
1da177e4 | 492 | } |
84cb3df0 | 493 | clear_bit(HCI_UART_PROTO_SET, &hu->flags); |
dac670b9 JH |
494 | |
495 | kfree(hu); | |
1da177e4 LT |
496 | } |
497 | ||
498 | /* hci_uart_tty_wakeup() | |
499 | * | |
500 | * Callback for transmit wakeup. Called when low level | |
501 | * device driver can accept more send data. | |
502 | * | |
503 | * Arguments: tty pointer to associated tty instance data | |
504 | * Return Value: None | |
505 | */ | |
506 | static void hci_uart_tty_wakeup(struct tty_struct *tty) | |
507 | { | |
dfe19d28 | 508 | struct hci_uart *hu = tty->disc_data; |
1da177e4 LT |
509 | |
510 | BT_DBG(""); | |
511 | ||
512 | if (!hu) | |
513 | return; | |
514 | ||
515 | clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); | |
516 | ||
517 | if (tty != hu->tty) | |
518 | return; | |
519 | ||
84cb3df0 | 520 | if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) |
1da177e4 LT |
521 | hci_uart_tx_wakeup(hu); |
522 | } | |
523 | ||
1da177e4 | 524 | /* hci_uart_tty_receive() |
1687dfc3 | 525 | * |
1da177e4 LT |
526 | * Called by tty low level driver when receive data is |
527 | * available. | |
1687dfc3 | 528 | * |
1da177e4 LT |
529 | * Arguments: tty pointer to tty isntance data |
530 | * data pointer to received data | |
531 | * flags pointer to flags for data | |
532 | * count count of received data in bytes | |
1687dfc3 | 533 | * |
55db4c64 | 534 | * Return Value: None |
1da177e4 | 535 | */ |
facf5225 MH |
536 | static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data, |
537 | char *flags, int count) | |
1da177e4 | 538 | { |
dfe19d28 | 539 | struct hci_uart *hu = tty->disc_data; |
0372a662 | 540 | |
1da177e4 | 541 | if (!hu || tty != hu->tty) |
55db4c64 | 542 | return; |
1da177e4 | 543 | |
84cb3df0 | 544 | if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) |
55db4c64 | 545 | return; |
0372a662 | 546 | |
7649faff FD |
547 | /* It does not need a lock here as it is already protected by a mutex in |
548 | * tty caller | |
549 | */ | |
9d1c40eb | 550 | hu->proto->recv(hu, data, count); |
788f0923 CP |
551 | |
552 | if (hu->hdev) | |
553 | hu->hdev->stat.byte_rx += count; | |
554 | ||
39c2e60f | 555 | tty_unthrottle(tty); |
1da177e4 LT |
556 | } |
557 | ||
558 | static int hci_uart_register_dev(struct hci_uart *hu) | |
559 | { | |
560 | struct hci_dev *hdev; | |
561 | ||
562 | BT_DBG(""); | |
563 | ||
564 | /* Initialize and register HCI device */ | |
565 | hdev = hci_alloc_dev(); | |
566 | if (!hdev) { | |
567 | BT_ERR("Can't allocate HCI device"); | |
568 | return -ENOMEM; | |
569 | } | |
570 | ||
571 | hu->hdev = hdev; | |
572 | ||
c13854ce | 573 | hdev->bus = HCI_UART; |
155961e8 | 574 | hci_set_drvdata(hdev, hu); |
1da177e4 | 575 | |
aee61f7a MH |
576 | /* Only when vendor specific setup callback is provided, consider |
577 | * the manufacturer information valid. This avoids filling in the | |
578 | * value for Ericsson when nothing is specified. | |
579 | */ | |
580 | if (hu->proto->setup) | |
581 | hdev->manufacturer = hu->proto->manufacturer; | |
582 | ||
1da177e4 LT |
583 | hdev->open = hci_uart_open; |
584 | hdev->close = hci_uart_close; | |
585 | hdev->flush = hci_uart_flush; | |
586 | hdev->send = hci_uart_send_frame; | |
eb173809 | 587 | hdev->setup = hci_uart_setup; |
6935e0f5 | 588 | SET_HCIDEV_DEV(hdev, hu->tty->dev); |
1da177e4 | 589 | |
63c7d09c JH |
590 | if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags)) |
591 | set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks); | |
592 | ||
6afd04ad MH |
593 | if (test_bit(HCI_UART_EXT_CONFIG, &hu->hdev_flags)) |
594 | set_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks); | |
595 | ||
a55e1f38 | 596 | if (!test_bit(HCI_UART_RESET_ON_INIT, &hu->hdev_flags)) |
a6c511c6 | 597 | set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks); |
a55e1f38 | 598 | |
8a7a3fd6 MH |
599 | if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags)) |
600 | hdev->dev_type = HCI_AMP; | |
601 | else | |
ca8bee5d | 602 | hdev->dev_type = HCI_PRIMARY; |
8a7a3fd6 | 603 | |
9f2aee84 JH |
604 | if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) |
605 | return 0; | |
606 | ||
1da177e4 LT |
607 | if (hci_register_dev(hdev) < 0) { |
608 | BT_ERR("Can't register HCI device"); | |
a225b8c7 | 609 | hu->hdev = NULL; |
1da177e4 LT |
610 | hci_free_dev(hdev); |
611 | return -ENODEV; | |
612 | } | |
613 | ||
9f2aee84 JH |
614 | set_bit(HCI_UART_REGISTERED, &hu->flags); |
615 | ||
1da177e4 LT |
616 | return 0; |
617 | } | |
618 | ||
619 | static int hci_uart_set_proto(struct hci_uart *hu, int id) | |
620 | { | |
4ee7ef19 | 621 | const struct hci_uart_proto *p; |
0372a662 MH |
622 | int err; |
623 | ||
1da177e4 LT |
624 | p = hci_uart_get_proto(id); |
625 | if (!p) | |
626 | return -EPROTONOSUPPORT; | |
627 | ||
628 | err = p->open(hu); | |
629 | if (err) | |
630 | return err; | |
631 | ||
632 | hu->proto = p; | |
84cb3df0 | 633 | set_bit(HCI_UART_PROTO_READY, &hu->flags); |
1da177e4 LT |
634 | |
635 | err = hci_uart_register_dev(hu); | |
636 | if (err) { | |
84cb3df0 | 637 | clear_bit(HCI_UART_PROTO_READY, &hu->flags); |
1da177e4 LT |
638 | p->close(hu); |
639 | return err; | |
640 | } | |
0372a662 | 641 | |
1da177e4 LT |
642 | return 0; |
643 | } | |
644 | ||
bb72bd68 MH |
645 | static int hci_uart_set_flags(struct hci_uart *hu, unsigned long flags) |
646 | { | |
647 | unsigned long valid_flags = BIT(HCI_UART_RAW_DEVICE) | | |
648 | BIT(HCI_UART_RESET_ON_INIT) | | |
649 | BIT(HCI_UART_CREATE_AMP) | | |
6afd04ad | 650 | BIT(HCI_UART_INIT_PENDING) | |
fb2ce8d1 MH |
651 | BIT(HCI_UART_EXT_CONFIG) | |
652 | BIT(HCI_UART_VND_DETECT); | |
bb72bd68 | 653 | |
41533fe5 | 654 | if (flags & ~valid_flags) |
bb72bd68 MH |
655 | return -EINVAL; |
656 | ||
657 | hu->hdev_flags = flags; | |
658 | ||
659 | return 0; | |
660 | } | |
661 | ||
1da177e4 LT |
662 | /* hci_uart_tty_ioctl() |
663 | * | |
664 | * Process IOCTL system call for the tty device. | |
665 | * | |
666 | * Arguments: | |
667 | * | |
668 | * tty pointer to tty instance data | |
669 | * file pointer to open file object for device | |
670 | * cmd IOCTL command code | |
671 | * arg argument for IOCTL call (cmd dependent) | |
672 | * | |
673 | * Return Value: Command dependent | |
674 | */ | |
facf5225 MH |
675 | static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file *file, |
676 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 677 | { |
dfe19d28 | 678 | struct hci_uart *hu = tty->disc_data; |
1da177e4 LT |
679 | int err = 0; |
680 | ||
681 | BT_DBG(""); | |
682 | ||
683 | /* Verify the status of the device */ | |
684 | if (!hu) | |
685 | return -EBADF; | |
686 | ||
687 | switch (cmd) { | |
688 | case HCIUARTSETPROTO: | |
689 | if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) { | |
690 | err = hci_uart_set_proto(hu, arg); | |
05650694 | 691 | if (err) |
1da177e4 | 692 | clear_bit(HCI_UART_PROTO_SET, &hu->flags); |
0372a662 | 693 | } else |
05650694 | 694 | err = -EBUSY; |
c33be3c3 | 695 | break; |
1da177e4 LT |
696 | |
697 | case HCIUARTGETPROTO: | |
698 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
05650694 VR |
699 | err = hu->proto->id; |
700 | else | |
701 | err = -EUNATCH; | |
702 | break; | |
0372a662 | 703 | |
d2158744 | 704 | case HCIUARTGETDEVICE: |
c7e0c141 | 705 | if (test_bit(HCI_UART_REGISTERED, &hu->flags)) |
05650694 VR |
706 | err = hu->hdev->id; |
707 | else | |
708 | err = -EUNATCH; | |
709 | break; | |
d2158744 | 710 | |
63c7d09c JH |
711 | case HCIUARTSETFLAGS: |
712 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
05650694 VR |
713 | err = -EBUSY; |
714 | else | |
715 | err = hci_uart_set_flags(hu, arg); | |
63c7d09c JH |
716 | break; |
717 | ||
718 | case HCIUARTGETFLAGS: | |
05650694 VR |
719 | err = hu->hdev_flags; |
720 | break; | |
63c7d09c | 721 | |
1da177e4 | 722 | default: |
47afa7a5 | 723 | err = n_tty_ioctl_helper(tty, file, cmd, arg); |
1da177e4 | 724 | break; |
a20890d0 | 725 | } |
1da177e4 LT |
726 | |
727 | return err; | |
728 | } | |
729 | ||
730 | /* | |
731 | * We don't provide read/write/poll interface for user space. | |
732 | */ | |
0372a662 | 733 | static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file, |
facf5225 | 734 | unsigned char __user *buf, size_t nr) |
1da177e4 LT |
735 | { |
736 | return 0; | |
737 | } | |
0372a662 MH |
738 | |
739 | static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file, | |
facf5225 | 740 | const unsigned char *data, size_t count) |
1da177e4 LT |
741 | { |
742 | return 0; | |
743 | } | |
0372a662 MH |
744 | |
745 | static unsigned int hci_uart_tty_poll(struct tty_struct *tty, | |
facf5225 | 746 | struct file *filp, poll_table *wait) |
1da177e4 LT |
747 | { |
748 | return 0; | |
749 | } | |
750 | ||
1da177e4 LT |
751 | static int __init hci_uart_init(void) |
752 | { | |
a352def2 | 753 | static struct tty_ldisc_ops hci_uart_ldisc; |
1da177e4 LT |
754 | int err; |
755 | ||
756 | BT_INFO("HCI UART driver ver %s", VERSION); | |
757 | ||
758 | /* Register the tty discipline */ | |
759 | ||
acf50c5f | 760 | memset(&hci_uart_ldisc, 0, sizeof(hci_uart_ldisc)); |
0372a662 MH |
761 | hci_uart_ldisc.magic = TTY_LDISC_MAGIC; |
762 | hci_uart_ldisc.name = "n_hci"; | |
763 | hci_uart_ldisc.open = hci_uart_tty_open; | |
764 | hci_uart_ldisc.close = hci_uart_tty_close; | |
765 | hci_uart_ldisc.read = hci_uart_tty_read; | |
766 | hci_uart_ldisc.write = hci_uart_tty_write; | |
767 | hci_uart_ldisc.ioctl = hci_uart_tty_ioctl; | |
768 | hci_uart_ldisc.poll = hci_uart_tty_poll; | |
0372a662 MH |
769 | hci_uart_ldisc.receive_buf = hci_uart_tty_receive; |
770 | hci_uart_ldisc.write_wakeup = hci_uart_tty_wakeup; | |
771 | hci_uart_ldisc.owner = THIS_MODULE; | |
1da177e4 | 772 | |
a08b15e6 VI |
773 | err = tty_register_ldisc(N_HCI, &hci_uart_ldisc); |
774 | if (err) { | |
1da177e4 LT |
775 | BT_ERR("HCI line discipline registration failed. (%d)", err); |
776 | return err; | |
777 | } | |
778 | ||
779 | #ifdef CONFIG_BT_HCIUART_H4 | |
780 | h4_init(); | |
781 | #endif | |
782 | #ifdef CONFIG_BT_HCIUART_BCSP | |
783 | bcsp_init(); | |
784 | #endif | |
166d2f6a OBC |
785 | #ifdef CONFIG_BT_HCIUART_LL |
786 | ll_init(); | |
787 | #endif | |
b3190df6 SS |
788 | #ifdef CONFIG_BT_HCIUART_ATH3K |
789 | ath_init(); | |
790 | #endif | |
7dec65c8 JH |
791 | #ifdef CONFIG_BT_HCIUART_3WIRE |
792 | h5_init(); | |
793 | #endif | |
ca93cee5 LP |
794 | #ifdef CONFIG_BT_HCIUART_INTEL |
795 | intel_init(); | |
796 | #endif | |
bdd8818e MH |
797 | #ifdef CONFIG_BT_HCIUART_BCM |
798 | bcm_init(); | |
799 | #endif | |
0ff252c1 BYTK |
800 | #ifdef CONFIG_BT_HCIUART_QCA |
801 | qca_init(); | |
802 | #endif | |
395174bb LP |
803 | #ifdef CONFIG_BT_HCIUART_AG6XX |
804 | ag6xx_init(); | |
805 | #endif | |
162f812f LP |
806 | #ifdef CONFIG_BT_HCIUART_MRVL |
807 | mrvl_init(); | |
808 | #endif | |
166d2f6a | 809 | |
1da177e4 LT |
810 | return 0; |
811 | } | |
812 | ||
813 | static void __exit hci_uart_exit(void) | |
814 | { | |
815 | int err; | |
816 | ||
817 | #ifdef CONFIG_BT_HCIUART_H4 | |
818 | h4_deinit(); | |
819 | #endif | |
820 | #ifdef CONFIG_BT_HCIUART_BCSP | |
821 | bcsp_deinit(); | |
822 | #endif | |
166d2f6a OBC |
823 | #ifdef CONFIG_BT_HCIUART_LL |
824 | ll_deinit(); | |
825 | #endif | |
b3190df6 SS |
826 | #ifdef CONFIG_BT_HCIUART_ATH3K |
827 | ath_deinit(); | |
828 | #endif | |
7dec65c8 JH |
829 | #ifdef CONFIG_BT_HCIUART_3WIRE |
830 | h5_deinit(); | |
831 | #endif | |
ca93cee5 LP |
832 | #ifdef CONFIG_BT_HCIUART_INTEL |
833 | intel_deinit(); | |
834 | #endif | |
bdd8818e MH |
835 | #ifdef CONFIG_BT_HCIUART_BCM |
836 | bcm_deinit(); | |
837 | #endif | |
0ff252c1 BYTK |
838 | #ifdef CONFIG_BT_HCIUART_QCA |
839 | qca_deinit(); | |
840 | #endif | |
395174bb LP |
841 | #ifdef CONFIG_BT_HCIUART_AG6XX |
842 | ag6xx_deinit(); | |
843 | #endif | |
162f812f LP |
844 | #ifdef CONFIG_BT_HCIUART_MRVL |
845 | mrvl_deinit(); | |
846 | #endif | |
1da177e4 LT |
847 | |
848 | /* Release tty registration of line discipline */ | |
a08b15e6 VI |
849 | err = tty_unregister_ldisc(N_HCI); |
850 | if (err) | |
1da177e4 LT |
851 | BT_ERR("Can't unregister HCI line discipline (%d)", err); |
852 | } | |
853 | ||
854 | module_init(hci_uart_init); | |
855 | module_exit(hci_uart_exit); | |
856 | ||
63fbd24e | 857 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
858 | MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION); |
859 | MODULE_VERSION(VERSION); | |
860 | MODULE_LICENSE("GPL"); | |
861 | MODULE_ALIAS_LDISC(N_HCI); |