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