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 | |
048e1bd3 | 116 | if (!skb) { |
dec2c928 DJ |
117 | read_lock(&hu->proto_lock); |
118 | ||
048e1bd3 DJ |
119 | if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) |
120 | skb = hu->proto->dequeue(hu); | |
dec2c928 DJ |
121 | |
122 | read_unlock(&hu->proto_lock); | |
048e1bd3 | 123 | } else { |
1da177e4 | 124 | hu->tx_skb = NULL; |
048e1bd3 | 125 | } |
0372a662 | 126 | |
1da177e4 LT |
127 | return skb; |
128 | } | |
129 | ||
130 | int hci_uart_tx_wakeup(struct hci_uart *hu) | |
131 | { | |
dec2c928 DJ |
132 | read_lock(&hu->proto_lock); |
133 | ||
2d6f1da1 | 134 | if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) |
dec2c928 | 135 | goto no_schedule; |
2d6f1da1 | 136 | |
1da177e4 LT |
137 | if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state)) { |
138 | set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); | |
dec2c928 | 139 | goto no_schedule; |
1da177e4 LT |
140 | } |
141 | ||
142 | BT_DBG(""); | |
143 | ||
da64c27d FB |
144 | schedule_work(&hu->write_work); |
145 | ||
dec2c928 DJ |
146 | no_schedule: |
147 | read_unlock(&hu->proto_lock); | |
148 | ||
da64c27d FB |
149 | return 0; |
150 | } | |
081f36a8 | 151 | EXPORT_SYMBOL_GPL(hci_uart_tx_wakeup); |
da64c27d FB |
152 | |
153 | static void hci_uart_write_work(struct work_struct *work) | |
154 | { | |
155 | struct hci_uart *hu = container_of(work, struct hci_uart, write_work); | |
156 | struct tty_struct *tty = hu->tty; | |
157 | struct hci_dev *hdev = hu->hdev; | |
158 | struct sk_buff *skb; | |
159 | ||
160 | /* REVISIT: should we cope with bad skbs or ->write() returning | |
161 | * and error value ? | |
162 | */ | |
163 | ||
1da177e4 LT |
164 | restart: |
165 | clear_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); | |
166 | ||
167 | while ((skb = hci_uart_dequeue(hu))) { | |
168 | int len; | |
0372a662 | 169 | |
1da177e4 | 170 | set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); |
f34d7a5b | 171 | len = tty->ops->write(tty, skb->data, skb->len); |
1da177e4 LT |
172 | hdev->stat.byte_tx += len; |
173 | ||
174 | skb_pull(skb, len); | |
175 | if (skb->len) { | |
176 | hu->tx_skb = skb; | |
177 | break; | |
178 | } | |
0372a662 | 179 | |
618e8bc2 | 180 | hci_uart_tx_complete(hu, hci_skb_pkt_type(skb)); |
1da177e4 | 181 | kfree_skb(skb); |
0372a662 MH |
182 | } |
183 | ||
1da177e4 LT |
184 | if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state)) |
185 | goto restart; | |
186 | ||
187 | clear_bit(HCI_UART_SENDING, &hu->tx_state); | |
1da177e4 LT |
188 | } |
189 | ||
9f2aee84 JH |
190 | static void hci_uart_init_work(struct work_struct *work) |
191 | { | |
192 | struct hci_uart *hu = container_of(work, struct hci_uart, init_ready); | |
193 | int err; | |
a225b8c7 | 194 | struct hci_dev *hdev; |
9f2aee84 JH |
195 | |
196 | if (!test_and_clear_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) | |
197 | return; | |
198 | ||
199 | err = hci_register_dev(hu->hdev); | |
200 | if (err < 0) { | |
201 | BT_ERR("Can't register HCI device"); | |
a225b8c7 | 202 | hdev = hu->hdev; |
9f2aee84 | 203 | hu->hdev = NULL; |
a225b8c7 | 204 | hci_free_dev(hdev); |
d160b74d | 205 | clear_bit(HCI_UART_PROTO_READY, &hu->flags); |
9f2aee84 | 206 | hu->proto->close(hu); |
cb926520 | 207 | return; |
9f2aee84 JH |
208 | } |
209 | ||
210 | set_bit(HCI_UART_REGISTERED, &hu->flags); | |
211 | } | |
212 | ||
213 | int hci_uart_init_ready(struct hci_uart *hu) | |
214 | { | |
215 | if (!test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) | |
216 | return -EALREADY; | |
217 | ||
218 | schedule_work(&hu->init_ready); | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
1da177e4 LT |
223 | /* ------- Interface to HCI layer ------ */ |
224 | /* Initialize device */ | |
225 | static int hci_uart_open(struct hci_dev *hdev) | |
226 | { | |
227 | BT_DBG("%s %p", hdev->name, hdev); | |
228 | ||
229 | /* Nothing to do for UART driver */ | |
1da177e4 LT |
230 | return 0; |
231 | } | |
232 | ||
233 | /* Reset device */ | |
234 | static int hci_uart_flush(struct hci_dev *hdev) | |
235 | { | |
155961e8 | 236 | struct hci_uart *hu = hci_get_drvdata(hdev); |
1da177e4 LT |
237 | struct tty_struct *tty = hu->tty; |
238 | ||
239 | BT_DBG("hdev %p tty %p", hdev, tty); | |
240 | ||
241 | if (hu->tx_skb) { | |
242 | kfree_skb(hu->tx_skb); hu->tx_skb = NULL; | |
243 | } | |
244 | ||
245 | /* Flush any pending characters in the driver and discipline. */ | |
246 | tty_ldisc_flush(tty); | |
f34d7a5b | 247 | tty_driver_flush_buffer(tty); |
1da177e4 | 248 | |
dec2c928 DJ |
249 | read_lock(&hu->proto_lock); |
250 | ||
84cb3df0 | 251 | if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) |
1da177e4 LT |
252 | hu->proto->flush(hu); |
253 | ||
dec2c928 DJ |
254 | read_unlock(&hu->proto_lock); |
255 | ||
1da177e4 LT |
256 | return 0; |
257 | } | |
258 | ||
259 | /* Close device */ | |
260 | static int hci_uart_close(struct hci_dev *hdev) | |
261 | { | |
262 | BT_DBG("hdev %p", hdev); | |
263 | ||
1da177e4 | 264 | hci_uart_flush(hdev); |
3611f4d2 | 265 | hdev->flush = NULL; |
1da177e4 LT |
266 | return 0; |
267 | } | |
268 | ||
269 | /* Send frames from HCI layer */ | |
7bd8f09f | 270 | static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb) |
1da177e4 | 271 | { |
52bc423a | 272 | struct hci_uart *hu = hci_get_drvdata(hdev); |
1da177e4 | 273 | |
618e8bc2 MH |
274 | BT_DBG("%s: type %d len %d", hdev->name, hci_skb_pkt_type(skb), |
275 | skb->len); | |
1da177e4 | 276 | |
dec2c928 DJ |
277 | read_lock(&hu->proto_lock); |
278 | ||
279 | if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) { | |
280 | read_unlock(&hu->proto_lock); | |
ab00f89f | 281 | return -EUNATCH; |
dec2c928 | 282 | } |
ab00f89f | 283 | |
1da177e4 | 284 | hu->proto->enqueue(hu, skb); |
dec2c928 | 285 | read_unlock(&hu->proto_lock); |
1da177e4 LT |
286 | |
287 | hci_uart_tx_wakeup(hu); | |
0372a662 | 288 | |
1da177e4 LT |
289 | return 0; |
290 | } | |
291 | ||
2a973dfa IF |
292 | /* Flow control or un-flow control the device */ |
293 | void hci_uart_set_flow_control(struct hci_uart *hu, bool enable) | |
294 | { | |
295 | struct tty_struct *tty = hu->tty; | |
296 | struct ktermios ktermios; | |
297 | int status; | |
298 | unsigned int set = 0; | |
299 | unsigned int clear = 0; | |
300 | ||
301 | if (enable) { | |
302 | /* Disable hardware flow control */ | |
303 | ktermios = tty->termios; | |
304 | ktermios.c_cflag &= ~CRTSCTS; | |
305 | status = tty_set_termios(tty, &ktermios); | |
306 | BT_DBG("Disabling hardware flow control: %s", | |
307 | status ? "failed" : "success"); | |
308 | ||
309 | /* Clear RTS to prevent the device from sending */ | |
310 | /* Most UARTs need OUT2 to enable interrupts */ | |
311 | status = tty->driver->ops->tiocmget(tty); | |
312 | BT_DBG("Current tiocm 0x%x", status); | |
313 | ||
314 | set &= ~(TIOCM_OUT2 | TIOCM_RTS); | |
315 | clear = ~set; | |
316 | set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | | |
317 | TIOCM_OUT2 | TIOCM_LOOP; | |
318 | clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | | |
319 | TIOCM_OUT2 | TIOCM_LOOP; | |
320 | status = tty->driver->ops->tiocmset(tty, set, clear); | |
321 | BT_DBG("Clearing RTS: %s", status ? "failed" : "success"); | |
322 | } else { | |
323 | /* Set RTS to allow the device to send again */ | |
324 | status = tty->driver->ops->tiocmget(tty); | |
325 | BT_DBG("Current tiocm 0x%x", status); | |
326 | ||
327 | set |= (TIOCM_OUT2 | TIOCM_RTS); | |
328 | clear = ~set; | |
329 | set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | | |
330 | TIOCM_OUT2 | TIOCM_LOOP; | |
331 | clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | | |
332 | TIOCM_OUT2 | TIOCM_LOOP; | |
333 | status = tty->driver->ops->tiocmset(tty, set, clear); | |
334 | BT_DBG("Setting RTS: %s", status ? "failed" : "success"); | |
335 | ||
336 | /* Re-enable hardware flow control */ | |
337 | ktermios = tty->termios; | |
338 | ktermios.c_cflag |= CRTSCTS; | |
339 | status = tty_set_termios(tty, &ktermios); | |
340 | BT_DBG("Enabling hardware flow control: %s", | |
341 | status ? "failed" : "success"); | |
342 | } | |
343 | } | |
344 | ||
345 | void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed, | |
346 | unsigned int oper_speed) | |
347 | { | |
348 | hu->init_speed = init_speed; | |
349 | hu->oper_speed = oper_speed; | |
350 | } | |
351 | ||
7721383f FD |
352 | void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed) |
353 | { | |
354 | struct tty_struct *tty = hu->tty; | |
355 | struct ktermios ktermios; | |
356 | ||
357 | ktermios = tty->termios; | |
358 | ktermios.c_cflag &= ~CBAUD; | |
7721383f FD |
359 | tty_termios_encode_baud_rate(&ktermios, speed, speed); |
360 | ||
361 | /* tty_set_termios() return not checked as it is always 0 */ | |
362 | tty_set_termios(tty, &ktermios); | |
363 | ||
2a973dfa IF |
364 | BT_DBG("%s: New tty speeds: %d/%d", hu->hdev->name, |
365 | tty->termios.c_ispeed, tty->termios.c_ospeed); | |
7721383f FD |
366 | } |
367 | ||
eb173809 LP |
368 | static int hci_uart_setup(struct hci_dev *hdev) |
369 | { | |
370 | struct hci_uart *hu = hci_get_drvdata(hdev); | |
fb2ce8d1 MH |
371 | struct hci_rp_read_local_version *ver; |
372 | struct sk_buff *skb; | |
2a973dfa | 373 | unsigned int speed; |
7721383f FD |
374 | int err; |
375 | ||
2a973dfa | 376 | /* Init speed if any */ |
960ef1d7 | 377 | if (hu->init_speed) |
2a973dfa | 378 | speed = hu->init_speed; |
960ef1d7 FD |
379 | else if (hu->proto->init_speed) |
380 | speed = hu->proto->init_speed; | |
2a973dfa IF |
381 | else |
382 | speed = 0; | |
383 | ||
384 | if (speed) | |
385 | hci_uart_set_baudrate(hu, speed); | |
386 | ||
387 | /* Operational speed if any */ | |
960ef1d7 | 388 | if (hu->oper_speed) |
2a973dfa | 389 | speed = hu->oper_speed; |
960ef1d7 FD |
390 | else if (hu->proto->oper_speed) |
391 | speed = hu->proto->oper_speed; | |
2a973dfa IF |
392 | else |
393 | speed = 0; | |
7721383f | 394 | |
2a973dfa IF |
395 | if (hu->proto->set_baudrate && speed) { |
396 | err = hu->proto->set_baudrate(hu, speed); | |
7721383f | 397 | if (!err) |
2a973dfa | 398 | hci_uart_set_baudrate(hu, speed); |
7721383f | 399 | } |
eb173809 LP |
400 | |
401 | if (hu->proto->setup) | |
402 | return hu->proto->setup(hu); | |
403 | ||
fb2ce8d1 MH |
404 | if (!test_bit(HCI_UART_VND_DETECT, &hu->hdev_flags)) |
405 | return 0; | |
406 | ||
407 | skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL, | |
408 | HCI_INIT_TIMEOUT); | |
409 | if (IS_ERR(skb)) { | |
410 | BT_ERR("%s: Reading local version information failed (%ld)", | |
411 | hdev->name, PTR_ERR(skb)); | |
412 | return 0; | |
413 | } | |
414 | ||
415 | if (skb->len != sizeof(*ver)) { | |
416 | BT_ERR("%s: Event length mismatch for version information", | |
417 | hdev->name); | |
418 | goto done; | |
419 | } | |
420 | ||
421 | ver = (struct hci_rp_read_local_version *)skb->data; | |
422 | ||
423 | switch (le16_to_cpu(ver->manufacturer)) { | |
16e3887f MH |
424 | #ifdef CONFIG_BT_HCIUART_INTEL |
425 | case 2: | |
bca03c95 MH |
426 | hdev->set_bdaddr = btintel_set_bdaddr; |
427 | btintel_check_bdaddr(hdev); | |
16e3887f | 428 | break; |
e9a2dd26 MH |
429 | #endif |
430 | #ifdef CONFIG_BT_HCIUART_BCM | |
431 | case 15: | |
3e0ac12a MH |
432 | hdev->set_bdaddr = btbcm_set_bdaddr; |
433 | btbcm_check_bdaddr(hdev); | |
e9a2dd26 | 434 | break; |
16e3887f | 435 | #endif |
fb2ce8d1 MH |
436 | } |
437 | ||
438 | done: | |
439 | kfree_skb(skb); | |
eb173809 LP |
440 | return 0; |
441 | } | |
442 | ||
1da177e4 LT |
443 | /* ------ LDISC part ------ */ |
444 | /* hci_uart_tty_open | |
1687dfc3 | 445 | * |
1da177e4 LT |
446 | * Called when line discipline changed to HCI_UART. |
447 | * | |
448 | * Arguments: | |
449 | * tty pointer to tty info structure | |
1687dfc3 | 450 | * Return Value: |
1da177e4 LT |
451 | * 0 if success, otherwise error code |
452 | */ | |
453 | static int hci_uart_tty_open(struct tty_struct *tty) | |
454 | { | |
f327b340 | 455 | struct hci_uart *hu; |
1da177e4 LT |
456 | |
457 | BT_DBG("tty %p", tty); | |
458 | ||
c19483cc AC |
459 | /* Error if the tty has no write op instead of leaving an exploitable |
460 | hole */ | |
461 | if (tty->ops->write == NULL) | |
462 | return -EOPNOTSUPP; | |
463 | ||
a08b15e6 VI |
464 | hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL); |
465 | if (!hu) { | |
7785162c | 466 | BT_ERR("Can't allocate control structure"); |
1da177e4 LT |
467 | return -ENFILE; |
468 | } | |
0372a662 | 469 | |
1da177e4 LT |
470 | tty->disc_data = hu; |
471 | hu->tty = tty; | |
33f0f88f | 472 | tty->receive_room = 65536; |
1da177e4 | 473 | |
aeac3014 SR |
474 | /* disable alignment support by default */ |
475 | hu->alignment = 1; | |
476 | hu->padding = 0; | |
477 | ||
9f2aee84 | 478 | INIT_WORK(&hu->init_ready, hci_uart_init_work); |
da64c27d | 479 | INIT_WORK(&hu->write_work, hci_uart_write_work); |
9f2aee84 | 480 | |
dec2c928 DJ |
481 | rwlock_init(&hu->proto_lock); |
482 | ||
e6e981c7 | 483 | /* Flush any pending characters in the driver */ |
f34d7a5b | 484 | tty_driver_flush_buffer(tty); |
1da177e4 LT |
485 | |
486 | return 0; | |
487 | } | |
488 | ||
489 | /* hci_uart_tty_close() | |
490 | * | |
491 | * Called when the line discipline is changed to something | |
492 | * else, the tty is closed, or the tty detects a hangup. | |
493 | */ | |
494 | static void hci_uart_tty_close(struct tty_struct *tty) | |
495 | { | |
dfe19d28 | 496 | struct hci_uart *hu = tty->disc_data; |
dac670b9 | 497 | struct hci_dev *hdev; |
dec2c928 | 498 | unsigned long flags; |
1da177e4 LT |
499 | |
500 | BT_DBG("tty %p", tty); | |
501 | ||
502 | /* Detach from the tty */ | |
503 | tty->disc_data = NULL; | |
504 | ||
dac670b9 JH |
505 | if (!hu) |
506 | return; | |
22ad4203 | 507 | |
dac670b9 JH |
508 | hdev = hu->hdev; |
509 | if (hdev) | |
510 | hci_uart_close(hdev); | |
1da177e4 | 511 | |
da64c27d FB |
512 | cancel_work_sync(&hu->write_work); |
513 | ||
dec2c928 DJ |
514 | if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) { |
515 | write_lock_irqsave(&hu->proto_lock, flags); | |
516 | clear_bit(HCI_UART_PROTO_READY, &hu->flags); | |
517 | write_unlock_irqrestore(&hu->proto_lock, flags); | |
518 | ||
dac670b9 | 519 | if (hdev) { |
9f2aee84 JH |
520 | if (test_bit(HCI_UART_REGISTERED, &hu->flags)) |
521 | hci_unregister_dev(hdev); | |
dac670b9 | 522 | hci_free_dev(hdev); |
1da177e4 | 523 | } |
dac670b9 | 524 | hu->proto->close(hu); |
1da177e4 | 525 | } |
84cb3df0 | 526 | clear_bit(HCI_UART_PROTO_SET, &hu->flags); |
dac670b9 JH |
527 | |
528 | kfree(hu); | |
1da177e4 LT |
529 | } |
530 | ||
531 | /* hci_uart_tty_wakeup() | |
532 | * | |
533 | * Callback for transmit wakeup. Called when low level | |
534 | * device driver can accept more send data. | |
535 | * | |
536 | * Arguments: tty pointer to associated tty instance data | |
537 | * Return Value: None | |
538 | */ | |
539 | static void hci_uart_tty_wakeup(struct tty_struct *tty) | |
540 | { | |
dfe19d28 | 541 | struct hci_uart *hu = tty->disc_data; |
1da177e4 LT |
542 | |
543 | BT_DBG(""); | |
544 | ||
545 | if (!hu) | |
546 | return; | |
547 | ||
548 | clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); | |
549 | ||
550 | if (tty != hu->tty) | |
551 | return; | |
552 | ||
84cb3df0 | 553 | if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) |
1da177e4 LT |
554 | hci_uart_tx_wakeup(hu); |
555 | } | |
556 | ||
1da177e4 | 557 | /* hci_uart_tty_receive() |
1687dfc3 | 558 | * |
1da177e4 LT |
559 | * Called by tty low level driver when receive data is |
560 | * available. | |
1687dfc3 | 561 | * |
1da177e4 LT |
562 | * Arguments: tty pointer to tty isntance data |
563 | * data pointer to received data | |
564 | * flags pointer to flags for data | |
565 | * count count of received data in bytes | |
1687dfc3 | 566 | * |
55db4c64 | 567 | * Return Value: None |
1da177e4 | 568 | */ |
facf5225 MH |
569 | static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data, |
570 | char *flags, int count) | |
1da177e4 | 571 | { |
dfe19d28 | 572 | struct hci_uart *hu = tty->disc_data; |
0372a662 | 573 | |
1da177e4 | 574 | if (!hu || tty != hu->tty) |
55db4c64 | 575 | return; |
1da177e4 | 576 | |
dec2c928 DJ |
577 | read_lock(&hu->proto_lock); |
578 | ||
579 | if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) { | |
580 | read_unlock(&hu->proto_lock); | |
55db4c64 | 581 | return; |
dec2c928 | 582 | } |
0372a662 | 583 | |
7649faff FD |
584 | /* It does not need a lock here as it is already protected by a mutex in |
585 | * tty caller | |
586 | */ | |
9d1c40eb | 587 | hu->proto->recv(hu, data, count); |
dec2c928 | 588 | read_unlock(&hu->proto_lock); |
788f0923 CP |
589 | |
590 | if (hu->hdev) | |
591 | hu->hdev->stat.byte_rx += count; | |
592 | ||
39c2e60f | 593 | tty_unthrottle(tty); |
1da177e4 LT |
594 | } |
595 | ||
596 | static int hci_uart_register_dev(struct hci_uart *hu) | |
597 | { | |
598 | struct hci_dev *hdev; | |
599 | ||
600 | BT_DBG(""); | |
601 | ||
602 | /* Initialize and register HCI device */ | |
603 | hdev = hci_alloc_dev(); | |
604 | if (!hdev) { | |
605 | BT_ERR("Can't allocate HCI device"); | |
606 | return -ENOMEM; | |
607 | } | |
608 | ||
609 | hu->hdev = hdev; | |
610 | ||
c13854ce | 611 | hdev->bus = HCI_UART; |
155961e8 | 612 | hci_set_drvdata(hdev, hu); |
1da177e4 | 613 | |
aee61f7a MH |
614 | /* Only when vendor specific setup callback is provided, consider |
615 | * the manufacturer information valid. This avoids filling in the | |
616 | * value for Ericsson when nothing is specified. | |
617 | */ | |
618 | if (hu->proto->setup) | |
619 | hdev->manufacturer = hu->proto->manufacturer; | |
620 | ||
1da177e4 LT |
621 | hdev->open = hci_uart_open; |
622 | hdev->close = hci_uart_close; | |
623 | hdev->flush = hci_uart_flush; | |
624 | hdev->send = hci_uart_send_frame; | |
eb173809 | 625 | hdev->setup = hci_uart_setup; |
6935e0f5 | 626 | SET_HCIDEV_DEV(hdev, hu->tty->dev); |
1da177e4 | 627 | |
63c7d09c JH |
628 | if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags)) |
629 | set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks); | |
630 | ||
6afd04ad MH |
631 | if (test_bit(HCI_UART_EXT_CONFIG, &hu->hdev_flags)) |
632 | set_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks); | |
633 | ||
a55e1f38 | 634 | if (!test_bit(HCI_UART_RESET_ON_INIT, &hu->hdev_flags)) |
a6c511c6 | 635 | set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks); |
a55e1f38 | 636 | |
8a7a3fd6 MH |
637 | if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags)) |
638 | hdev->dev_type = HCI_AMP; | |
639 | else | |
ca8bee5d | 640 | hdev->dev_type = HCI_PRIMARY; |
8a7a3fd6 | 641 | |
9f2aee84 JH |
642 | if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) |
643 | return 0; | |
644 | ||
1da177e4 LT |
645 | if (hci_register_dev(hdev) < 0) { |
646 | BT_ERR("Can't register HCI device"); | |
a225b8c7 | 647 | hu->hdev = NULL; |
1da177e4 LT |
648 | hci_free_dev(hdev); |
649 | return -ENODEV; | |
650 | } | |
651 | ||
9f2aee84 JH |
652 | set_bit(HCI_UART_REGISTERED, &hu->flags); |
653 | ||
1da177e4 LT |
654 | return 0; |
655 | } | |
656 | ||
657 | static int hci_uart_set_proto(struct hci_uart *hu, int id) | |
658 | { | |
4ee7ef19 | 659 | const struct hci_uart_proto *p; |
0372a662 MH |
660 | int err; |
661 | ||
1da177e4 LT |
662 | p = hci_uart_get_proto(id); |
663 | if (!p) | |
664 | return -EPROTONOSUPPORT; | |
665 | ||
666 | err = p->open(hu); | |
667 | if (err) | |
668 | return err; | |
669 | ||
670 | hu->proto = p; | |
84cb3df0 | 671 | set_bit(HCI_UART_PROTO_READY, &hu->flags); |
1da177e4 LT |
672 | |
673 | err = hci_uart_register_dev(hu); | |
674 | if (err) { | |
84cb3df0 | 675 | clear_bit(HCI_UART_PROTO_READY, &hu->flags); |
1da177e4 LT |
676 | p->close(hu); |
677 | return err; | |
678 | } | |
0372a662 | 679 | |
1da177e4 LT |
680 | return 0; |
681 | } | |
682 | ||
bb72bd68 MH |
683 | static int hci_uart_set_flags(struct hci_uart *hu, unsigned long flags) |
684 | { | |
685 | unsigned long valid_flags = BIT(HCI_UART_RAW_DEVICE) | | |
686 | BIT(HCI_UART_RESET_ON_INIT) | | |
687 | BIT(HCI_UART_CREATE_AMP) | | |
6afd04ad | 688 | BIT(HCI_UART_INIT_PENDING) | |
fb2ce8d1 MH |
689 | BIT(HCI_UART_EXT_CONFIG) | |
690 | BIT(HCI_UART_VND_DETECT); | |
bb72bd68 | 691 | |
41533fe5 | 692 | if (flags & ~valid_flags) |
bb72bd68 MH |
693 | return -EINVAL; |
694 | ||
695 | hu->hdev_flags = flags; | |
696 | ||
697 | return 0; | |
698 | } | |
699 | ||
1da177e4 LT |
700 | /* hci_uart_tty_ioctl() |
701 | * | |
702 | * Process IOCTL system call for the tty device. | |
703 | * | |
704 | * Arguments: | |
705 | * | |
706 | * tty pointer to tty instance data | |
707 | * file pointer to open file object for device | |
708 | * cmd IOCTL command code | |
709 | * arg argument for IOCTL call (cmd dependent) | |
710 | * | |
711 | * Return Value: Command dependent | |
712 | */ | |
facf5225 MH |
713 | static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file *file, |
714 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 715 | { |
dfe19d28 | 716 | struct hci_uart *hu = tty->disc_data; |
1da177e4 LT |
717 | int err = 0; |
718 | ||
719 | BT_DBG(""); | |
720 | ||
721 | /* Verify the status of the device */ | |
722 | if (!hu) | |
723 | return -EBADF; | |
724 | ||
725 | switch (cmd) { | |
726 | case HCIUARTSETPROTO: | |
727 | if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) { | |
728 | err = hci_uart_set_proto(hu, arg); | |
05650694 | 729 | if (err) |
1da177e4 | 730 | clear_bit(HCI_UART_PROTO_SET, &hu->flags); |
0372a662 | 731 | } else |
05650694 | 732 | err = -EBUSY; |
c33be3c3 | 733 | break; |
1da177e4 LT |
734 | |
735 | case HCIUARTGETPROTO: | |
736 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
05650694 VR |
737 | err = hu->proto->id; |
738 | else | |
739 | err = -EUNATCH; | |
740 | break; | |
0372a662 | 741 | |
d2158744 | 742 | case HCIUARTGETDEVICE: |
c7e0c141 | 743 | if (test_bit(HCI_UART_REGISTERED, &hu->flags)) |
05650694 VR |
744 | err = hu->hdev->id; |
745 | else | |
746 | err = -EUNATCH; | |
747 | break; | |
d2158744 | 748 | |
63c7d09c JH |
749 | case HCIUARTSETFLAGS: |
750 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
05650694 VR |
751 | err = -EBUSY; |
752 | else | |
753 | err = hci_uart_set_flags(hu, arg); | |
63c7d09c JH |
754 | break; |
755 | ||
756 | case HCIUARTGETFLAGS: | |
05650694 VR |
757 | err = hu->hdev_flags; |
758 | break; | |
63c7d09c | 759 | |
1da177e4 | 760 | default: |
47afa7a5 | 761 | err = n_tty_ioctl_helper(tty, file, cmd, arg); |
1da177e4 | 762 | break; |
a20890d0 | 763 | } |
1da177e4 LT |
764 | |
765 | return err; | |
766 | } | |
767 | ||
768 | /* | |
769 | * We don't provide read/write/poll interface for user space. | |
770 | */ | |
0372a662 | 771 | static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file, |
facf5225 | 772 | unsigned char __user *buf, size_t nr) |
1da177e4 LT |
773 | { |
774 | return 0; | |
775 | } | |
0372a662 MH |
776 | |
777 | static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file, | |
facf5225 | 778 | const unsigned char *data, size_t count) |
1da177e4 LT |
779 | { |
780 | return 0; | |
781 | } | |
0372a662 MH |
782 | |
783 | static unsigned int hci_uart_tty_poll(struct tty_struct *tty, | |
facf5225 | 784 | struct file *filp, poll_table *wait) |
1da177e4 LT |
785 | { |
786 | return 0; | |
787 | } | |
788 | ||
1da177e4 LT |
789 | static int __init hci_uart_init(void) |
790 | { | |
a352def2 | 791 | static struct tty_ldisc_ops hci_uart_ldisc; |
1da177e4 LT |
792 | int err; |
793 | ||
794 | BT_INFO("HCI UART driver ver %s", VERSION); | |
795 | ||
796 | /* Register the tty discipline */ | |
797 | ||
acf50c5f | 798 | memset(&hci_uart_ldisc, 0, sizeof(hci_uart_ldisc)); |
0372a662 MH |
799 | hci_uart_ldisc.magic = TTY_LDISC_MAGIC; |
800 | hci_uart_ldisc.name = "n_hci"; | |
801 | hci_uart_ldisc.open = hci_uart_tty_open; | |
802 | hci_uart_ldisc.close = hci_uart_tty_close; | |
803 | hci_uart_ldisc.read = hci_uart_tty_read; | |
804 | hci_uart_ldisc.write = hci_uart_tty_write; | |
805 | hci_uart_ldisc.ioctl = hci_uart_tty_ioctl; | |
806 | hci_uart_ldisc.poll = hci_uart_tty_poll; | |
0372a662 MH |
807 | hci_uart_ldisc.receive_buf = hci_uart_tty_receive; |
808 | hci_uart_ldisc.write_wakeup = hci_uart_tty_wakeup; | |
809 | hci_uart_ldisc.owner = THIS_MODULE; | |
1da177e4 | 810 | |
a08b15e6 VI |
811 | err = tty_register_ldisc(N_HCI, &hci_uart_ldisc); |
812 | if (err) { | |
1da177e4 LT |
813 | BT_ERR("HCI line discipline registration failed. (%d)", err); |
814 | return err; | |
815 | } | |
816 | ||
817 | #ifdef CONFIG_BT_HCIUART_H4 | |
818 | h4_init(); | |
819 | #endif | |
820 | #ifdef CONFIG_BT_HCIUART_BCSP | |
821 | bcsp_init(); | |
822 | #endif | |
166d2f6a OBC |
823 | #ifdef CONFIG_BT_HCIUART_LL |
824 | ll_init(); | |
825 | #endif | |
b3190df6 SS |
826 | #ifdef CONFIG_BT_HCIUART_ATH3K |
827 | ath_init(); | |
828 | #endif | |
7dec65c8 JH |
829 | #ifdef CONFIG_BT_HCIUART_3WIRE |
830 | h5_init(); | |
831 | #endif | |
ca93cee5 LP |
832 | #ifdef CONFIG_BT_HCIUART_INTEL |
833 | intel_init(); | |
834 | #endif | |
bdd8818e MH |
835 | #ifdef CONFIG_BT_HCIUART_BCM |
836 | bcm_init(); | |
837 | #endif | |
0ff252c1 BYTK |
838 | #ifdef CONFIG_BT_HCIUART_QCA |
839 | qca_init(); | |
840 | #endif | |
395174bb LP |
841 | #ifdef CONFIG_BT_HCIUART_AG6XX |
842 | ag6xx_init(); | |
843 | #endif | |
162f812f LP |
844 | #ifdef CONFIG_BT_HCIUART_MRVL |
845 | mrvl_init(); | |
846 | #endif | |
166d2f6a | 847 | |
1da177e4 LT |
848 | return 0; |
849 | } | |
850 | ||
851 | static void __exit hci_uart_exit(void) | |
852 | { | |
853 | int err; | |
854 | ||
855 | #ifdef CONFIG_BT_HCIUART_H4 | |
856 | h4_deinit(); | |
857 | #endif | |
858 | #ifdef CONFIG_BT_HCIUART_BCSP | |
859 | bcsp_deinit(); | |
860 | #endif | |
166d2f6a OBC |
861 | #ifdef CONFIG_BT_HCIUART_LL |
862 | ll_deinit(); | |
863 | #endif | |
b3190df6 SS |
864 | #ifdef CONFIG_BT_HCIUART_ATH3K |
865 | ath_deinit(); | |
866 | #endif | |
7dec65c8 JH |
867 | #ifdef CONFIG_BT_HCIUART_3WIRE |
868 | h5_deinit(); | |
869 | #endif | |
ca93cee5 LP |
870 | #ifdef CONFIG_BT_HCIUART_INTEL |
871 | intel_deinit(); | |
872 | #endif | |
bdd8818e MH |
873 | #ifdef CONFIG_BT_HCIUART_BCM |
874 | bcm_deinit(); | |
875 | #endif | |
0ff252c1 BYTK |
876 | #ifdef CONFIG_BT_HCIUART_QCA |
877 | qca_deinit(); | |
878 | #endif | |
395174bb LP |
879 | #ifdef CONFIG_BT_HCIUART_AG6XX |
880 | ag6xx_deinit(); | |
881 | #endif | |
162f812f LP |
882 | #ifdef CONFIG_BT_HCIUART_MRVL |
883 | mrvl_deinit(); | |
884 | #endif | |
1da177e4 LT |
885 | |
886 | /* Release tty registration of line discipline */ | |
a08b15e6 VI |
887 | err = tty_unregister_ldisc(N_HCI); |
888 | if (err) | |
1da177e4 LT |
889 | BT_ERR("Can't unregister HCI line discipline (%d)", err); |
890 | } | |
891 | ||
892 | module_init(hci_uart_init); | |
893 | module_exit(hci_uart_exit); | |
894 | ||
63fbd24e | 895 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
896 | MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION); |
897 | MODULE_VERSION(VERSION); | |
898 | MODULE_LICENSE("GPL"); | |
899 | MODULE_ALIAS_LDISC(N_HCI); |