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 | } | |
137 | ||
138 | static void hci_uart_write_work(struct work_struct *work) | |
139 | { | |
140 | struct hci_uart *hu = container_of(work, struct hci_uart, write_work); | |
141 | struct tty_struct *tty = hu->tty; | |
142 | struct hci_dev *hdev = hu->hdev; | |
143 | struct sk_buff *skb; | |
144 | ||
145 | /* REVISIT: should we cope with bad skbs or ->write() returning | |
146 | * and error value ? | |
147 | */ | |
148 | ||
1da177e4 LT |
149 | restart: |
150 | clear_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); | |
151 | ||
152 | while ((skb = hci_uart_dequeue(hu))) { | |
153 | int len; | |
0372a662 | 154 | |
1da177e4 | 155 | set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); |
f34d7a5b | 156 | len = tty->ops->write(tty, skb->data, skb->len); |
1da177e4 LT |
157 | hdev->stat.byte_tx += len; |
158 | ||
159 | skb_pull(skb, len); | |
160 | if (skb->len) { | |
161 | hu->tx_skb = skb; | |
162 | break; | |
163 | } | |
0372a662 | 164 | |
0d48d939 | 165 | hci_uart_tx_complete(hu, bt_cb(skb)->pkt_type); |
1da177e4 | 166 | kfree_skb(skb); |
0372a662 MH |
167 | } |
168 | ||
1da177e4 LT |
169 | if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state)) |
170 | goto restart; | |
171 | ||
172 | clear_bit(HCI_UART_SENDING, &hu->tx_state); | |
1da177e4 LT |
173 | } |
174 | ||
9f2aee84 JH |
175 | static void hci_uart_init_work(struct work_struct *work) |
176 | { | |
177 | struct hci_uart *hu = container_of(work, struct hci_uart, init_ready); | |
178 | int err; | |
179 | ||
180 | if (!test_and_clear_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) | |
181 | return; | |
182 | ||
183 | err = hci_register_dev(hu->hdev); | |
184 | if (err < 0) { | |
185 | BT_ERR("Can't register HCI device"); | |
186 | hci_free_dev(hu->hdev); | |
187 | hu->hdev = NULL; | |
188 | hu->proto->close(hu); | |
189 | } | |
190 | ||
191 | set_bit(HCI_UART_REGISTERED, &hu->flags); | |
192 | } | |
193 | ||
194 | int hci_uart_init_ready(struct hci_uart *hu) | |
195 | { | |
196 | if (!test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) | |
197 | return -EALREADY; | |
198 | ||
199 | schedule_work(&hu->init_ready); | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
1da177e4 LT |
204 | /* ------- Interface to HCI layer ------ */ |
205 | /* Initialize device */ | |
206 | static int hci_uart_open(struct hci_dev *hdev) | |
207 | { | |
208 | BT_DBG("%s %p", hdev->name, hdev); | |
209 | ||
210 | /* Nothing to do for UART driver */ | |
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 | ||
1da177e4 | 241 | hci_uart_flush(hdev); |
3611f4d2 | 242 | hdev->flush = NULL; |
1da177e4 LT |
243 | return 0; |
244 | } | |
245 | ||
246 | /* Send frames from HCI layer */ | |
7bd8f09f | 247 | static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb) |
1da177e4 | 248 | { |
52bc423a | 249 | struct hci_uart *hu = hci_get_drvdata(hdev); |
1da177e4 | 250 | |
0d48d939 | 251 | BT_DBG("%s: type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
1da177e4 LT |
252 | |
253 | hu->proto->enqueue(hu, skb); | |
254 | ||
255 | hci_uart_tx_wakeup(hu); | |
0372a662 | 256 | |
1da177e4 LT |
257 | return 0; |
258 | } | |
259 | ||
2a973dfa IF |
260 | /* Flow control or un-flow control the device */ |
261 | void hci_uart_set_flow_control(struct hci_uart *hu, bool enable) | |
262 | { | |
263 | struct tty_struct *tty = hu->tty; | |
264 | struct ktermios ktermios; | |
265 | int status; | |
266 | unsigned int set = 0; | |
267 | unsigned int clear = 0; | |
268 | ||
269 | if (enable) { | |
270 | /* Disable hardware flow control */ | |
271 | ktermios = tty->termios; | |
272 | ktermios.c_cflag &= ~CRTSCTS; | |
273 | status = tty_set_termios(tty, &ktermios); | |
274 | BT_DBG("Disabling hardware flow control: %s", | |
275 | status ? "failed" : "success"); | |
276 | ||
277 | /* Clear RTS to prevent the device from sending */ | |
278 | /* Most UARTs need OUT2 to enable interrupts */ | |
279 | status = tty->driver->ops->tiocmget(tty); | |
280 | BT_DBG("Current tiocm 0x%x", status); | |
281 | ||
282 | set &= ~(TIOCM_OUT2 | TIOCM_RTS); | |
283 | clear = ~set; | |
284 | set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | | |
285 | TIOCM_OUT2 | TIOCM_LOOP; | |
286 | clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | | |
287 | TIOCM_OUT2 | TIOCM_LOOP; | |
288 | status = tty->driver->ops->tiocmset(tty, set, clear); | |
289 | BT_DBG("Clearing RTS: %s", status ? "failed" : "success"); | |
290 | } else { | |
291 | /* Set RTS to allow the device to send again */ | |
292 | status = tty->driver->ops->tiocmget(tty); | |
293 | BT_DBG("Current tiocm 0x%x", status); | |
294 | ||
295 | set |= (TIOCM_OUT2 | TIOCM_RTS); | |
296 | clear = ~set; | |
297 | set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | | |
298 | TIOCM_OUT2 | TIOCM_LOOP; | |
299 | clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | | |
300 | TIOCM_OUT2 | TIOCM_LOOP; | |
301 | status = tty->driver->ops->tiocmset(tty, set, clear); | |
302 | BT_DBG("Setting RTS: %s", status ? "failed" : "success"); | |
303 | ||
304 | /* Re-enable hardware flow control */ | |
305 | ktermios = tty->termios; | |
306 | ktermios.c_cflag |= CRTSCTS; | |
307 | status = tty_set_termios(tty, &ktermios); | |
308 | BT_DBG("Enabling hardware flow control: %s", | |
309 | status ? "failed" : "success"); | |
310 | } | |
311 | } | |
312 | ||
313 | void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed, | |
314 | unsigned int oper_speed) | |
315 | { | |
316 | hu->init_speed = init_speed; | |
317 | hu->oper_speed = oper_speed; | |
318 | } | |
319 | ||
320 | void hci_uart_init_tty(struct hci_uart *hu) | |
321 | { | |
322 | struct tty_struct *tty = hu->tty; | |
323 | struct ktermios ktermios; | |
324 | ||
325 | /* Bring the UART into a known 8 bits no parity hw fc state */ | |
326 | ktermios = tty->termios; | |
327 | ktermios.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | | |
328 | INLCR | IGNCR | ICRNL | IXON); | |
329 | ktermios.c_oflag &= ~OPOST; | |
330 | ktermios.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN); | |
331 | ktermios.c_cflag &= ~(CSIZE | PARENB); | |
332 | ktermios.c_cflag |= CS8; | |
333 | ktermios.c_cflag |= CRTSCTS; | |
334 | ||
335 | /* tty_set_termios() return not checked as it is always 0 */ | |
336 | tty_set_termios(tty, &ktermios); | |
337 | } | |
338 | ||
7721383f FD |
339 | void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed) |
340 | { | |
341 | struct tty_struct *tty = hu->tty; | |
342 | struct ktermios ktermios; | |
343 | ||
344 | ktermios = tty->termios; | |
345 | ktermios.c_cflag &= ~CBAUD; | |
7721383f FD |
346 | tty_termios_encode_baud_rate(&ktermios, speed, speed); |
347 | ||
348 | /* tty_set_termios() return not checked as it is always 0 */ | |
349 | tty_set_termios(tty, &ktermios); | |
350 | ||
2a973dfa IF |
351 | BT_DBG("%s: New tty speeds: %d/%d", hu->hdev->name, |
352 | tty->termios.c_ispeed, tty->termios.c_ospeed); | |
7721383f FD |
353 | } |
354 | ||
eb173809 LP |
355 | static int hci_uart_setup(struct hci_dev *hdev) |
356 | { | |
357 | struct hci_uart *hu = hci_get_drvdata(hdev); | |
fb2ce8d1 MH |
358 | struct hci_rp_read_local_version *ver; |
359 | struct sk_buff *skb; | |
2a973dfa | 360 | unsigned int speed; |
7721383f FD |
361 | int err; |
362 | ||
2a973dfa | 363 | /* Init speed if any */ |
960ef1d7 | 364 | if (hu->init_speed) |
2a973dfa | 365 | speed = hu->init_speed; |
960ef1d7 FD |
366 | else if (hu->proto->init_speed) |
367 | speed = hu->proto->init_speed; | |
2a973dfa IF |
368 | else |
369 | speed = 0; | |
370 | ||
371 | if (speed) | |
372 | hci_uart_set_baudrate(hu, speed); | |
373 | ||
374 | /* Operational speed if any */ | |
960ef1d7 | 375 | if (hu->oper_speed) |
2a973dfa | 376 | speed = hu->oper_speed; |
960ef1d7 FD |
377 | else if (hu->proto->oper_speed) |
378 | speed = hu->proto->oper_speed; | |
2a973dfa IF |
379 | else |
380 | speed = 0; | |
7721383f | 381 | |
2a973dfa IF |
382 | if (hu->proto->set_baudrate && speed) { |
383 | err = hu->proto->set_baudrate(hu, speed); | |
7721383f | 384 | if (!err) |
2a973dfa | 385 | hci_uart_set_baudrate(hu, speed); |
7721383f | 386 | } |
eb173809 LP |
387 | |
388 | if (hu->proto->setup) | |
389 | return hu->proto->setup(hu); | |
390 | ||
fb2ce8d1 MH |
391 | if (!test_bit(HCI_UART_VND_DETECT, &hu->hdev_flags)) |
392 | return 0; | |
393 | ||
394 | skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL, | |
395 | HCI_INIT_TIMEOUT); | |
396 | if (IS_ERR(skb)) { | |
397 | BT_ERR("%s: Reading local version information failed (%ld)", | |
398 | hdev->name, PTR_ERR(skb)); | |
399 | return 0; | |
400 | } | |
401 | ||
402 | if (skb->len != sizeof(*ver)) { | |
403 | BT_ERR("%s: Event length mismatch for version information", | |
404 | hdev->name); | |
405 | goto done; | |
406 | } | |
407 | ||
408 | ver = (struct hci_rp_read_local_version *)skb->data; | |
409 | ||
410 | switch (le16_to_cpu(ver->manufacturer)) { | |
16e3887f MH |
411 | #ifdef CONFIG_BT_HCIUART_INTEL |
412 | case 2: | |
bca03c95 MH |
413 | hdev->set_bdaddr = btintel_set_bdaddr; |
414 | btintel_check_bdaddr(hdev); | |
16e3887f | 415 | break; |
e9a2dd26 MH |
416 | #endif |
417 | #ifdef CONFIG_BT_HCIUART_BCM | |
418 | case 15: | |
3e0ac12a MH |
419 | hdev->set_bdaddr = btbcm_set_bdaddr; |
420 | btbcm_check_bdaddr(hdev); | |
e9a2dd26 | 421 | break; |
16e3887f | 422 | #endif |
fb2ce8d1 MH |
423 | } |
424 | ||
425 | done: | |
426 | kfree_skb(skb); | |
eb173809 LP |
427 | return 0; |
428 | } | |
429 | ||
1da177e4 LT |
430 | /* ------ LDISC part ------ */ |
431 | /* hci_uart_tty_open | |
1687dfc3 | 432 | * |
1da177e4 LT |
433 | * Called when line discipline changed to HCI_UART. |
434 | * | |
435 | * Arguments: | |
436 | * tty pointer to tty info structure | |
1687dfc3 | 437 | * Return Value: |
1da177e4 LT |
438 | * 0 if success, otherwise error code |
439 | */ | |
440 | static int hci_uart_tty_open(struct tty_struct *tty) | |
441 | { | |
f327b340 | 442 | struct hci_uart *hu; |
1da177e4 LT |
443 | |
444 | BT_DBG("tty %p", tty); | |
445 | ||
c19483cc AC |
446 | /* Error if the tty has no write op instead of leaving an exploitable |
447 | hole */ | |
448 | if (tty->ops->write == NULL) | |
449 | return -EOPNOTSUPP; | |
450 | ||
a08b15e6 VI |
451 | hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL); |
452 | if (!hu) { | |
7785162c | 453 | BT_ERR("Can't allocate control structure"); |
1da177e4 LT |
454 | return -ENFILE; |
455 | } | |
0372a662 | 456 | |
1da177e4 LT |
457 | tty->disc_data = hu; |
458 | hu->tty = tty; | |
33f0f88f | 459 | tty->receive_room = 65536; |
1da177e4 | 460 | |
9f2aee84 | 461 | INIT_WORK(&hu->init_ready, hci_uart_init_work); |
da64c27d | 462 | INIT_WORK(&hu->write_work, hci_uart_write_work); |
9f2aee84 | 463 | |
1da177e4 | 464 | /* Flush any pending characters in the driver and line discipline. */ |
0372a662 | 465 | |
1da177e4 LT |
466 | /* FIXME: why is this needed. Note don't use ldisc_ref here as the |
467 | open path is before the ldisc is referencable */ | |
0372a662 | 468 | |
c65c9bc3 AC |
469 | if (tty->ldisc->ops->flush_buffer) |
470 | tty->ldisc->ops->flush_buffer(tty); | |
f34d7a5b | 471 | tty_driver_flush_buffer(tty); |
1da177e4 LT |
472 | |
473 | return 0; | |
474 | } | |
475 | ||
476 | /* hci_uart_tty_close() | |
477 | * | |
478 | * Called when the line discipline is changed to something | |
479 | * else, the tty is closed, or the tty detects a hangup. | |
480 | */ | |
481 | static void hci_uart_tty_close(struct tty_struct *tty) | |
482 | { | |
dfe19d28 | 483 | struct hci_uart *hu = tty->disc_data; |
dac670b9 | 484 | struct hci_dev *hdev; |
1da177e4 LT |
485 | |
486 | BT_DBG("tty %p", tty); | |
487 | ||
488 | /* Detach from the tty */ | |
489 | tty->disc_data = NULL; | |
490 | ||
dac670b9 JH |
491 | if (!hu) |
492 | return; | |
22ad4203 | 493 | |
dac670b9 JH |
494 | hdev = hu->hdev; |
495 | if (hdev) | |
496 | hci_uart_close(hdev); | |
1da177e4 | 497 | |
da64c27d FB |
498 | cancel_work_sync(&hu->write_work); |
499 | ||
dac670b9 JH |
500 | if (test_and_clear_bit(HCI_UART_PROTO_SET, &hu->flags)) { |
501 | if (hdev) { | |
9f2aee84 JH |
502 | if (test_bit(HCI_UART_REGISTERED, &hu->flags)) |
503 | hci_unregister_dev(hdev); | |
dac670b9 | 504 | hci_free_dev(hdev); |
1da177e4 | 505 | } |
dac670b9 | 506 | hu->proto->close(hu); |
1da177e4 | 507 | } |
dac670b9 JH |
508 | |
509 | kfree(hu); | |
1da177e4 LT |
510 | } |
511 | ||
512 | /* hci_uart_tty_wakeup() | |
513 | * | |
514 | * Callback for transmit wakeup. Called when low level | |
515 | * device driver can accept more send data. | |
516 | * | |
517 | * Arguments: tty pointer to associated tty instance data | |
518 | * Return Value: None | |
519 | */ | |
520 | static void hci_uart_tty_wakeup(struct tty_struct *tty) | |
521 | { | |
dfe19d28 | 522 | struct hci_uart *hu = tty->disc_data; |
1da177e4 LT |
523 | |
524 | BT_DBG(""); | |
525 | ||
526 | if (!hu) | |
527 | return; | |
528 | ||
529 | clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); | |
530 | ||
531 | if (tty != hu->tty) | |
532 | return; | |
533 | ||
534 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
535 | hci_uart_tx_wakeup(hu); | |
536 | } | |
537 | ||
1da177e4 | 538 | /* hci_uart_tty_receive() |
1687dfc3 | 539 | * |
1da177e4 LT |
540 | * Called by tty low level driver when receive data is |
541 | * available. | |
1687dfc3 | 542 | * |
1da177e4 LT |
543 | * Arguments: tty pointer to tty isntance data |
544 | * data pointer to received data | |
545 | * flags pointer to flags for data | |
546 | * count count of received data in bytes | |
1687dfc3 | 547 | * |
55db4c64 | 548 | * Return Value: None |
1da177e4 | 549 | */ |
facf5225 MH |
550 | static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data, |
551 | char *flags, int count) | |
1da177e4 | 552 | { |
dfe19d28 | 553 | struct hci_uart *hu = tty->disc_data; |
0372a662 | 554 | |
1da177e4 | 555 | if (!hu || tty != hu->tty) |
55db4c64 | 556 | return; |
1da177e4 LT |
557 | |
558 | if (!test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
55db4c64 | 559 | return; |
0372a662 | 560 | |
7649faff FD |
561 | /* It does not need a lock here as it is already protected by a mutex in |
562 | * tty caller | |
563 | */ | |
9d1c40eb | 564 | hu->proto->recv(hu, data, count); |
788f0923 CP |
565 | |
566 | if (hu->hdev) | |
567 | hu->hdev->stat.byte_rx += count; | |
568 | ||
39c2e60f | 569 | tty_unthrottle(tty); |
1da177e4 LT |
570 | } |
571 | ||
572 | static int hci_uart_register_dev(struct hci_uart *hu) | |
573 | { | |
574 | struct hci_dev *hdev; | |
575 | ||
576 | BT_DBG(""); | |
577 | ||
578 | /* Initialize and register HCI device */ | |
579 | hdev = hci_alloc_dev(); | |
580 | if (!hdev) { | |
581 | BT_ERR("Can't allocate HCI device"); | |
582 | return -ENOMEM; | |
583 | } | |
584 | ||
585 | hu->hdev = hdev; | |
586 | ||
c13854ce | 587 | hdev->bus = HCI_UART; |
155961e8 | 588 | hci_set_drvdata(hdev, hu); |
1da177e4 | 589 | |
aee61f7a MH |
590 | /* Only when vendor specific setup callback is provided, consider |
591 | * the manufacturer information valid. This avoids filling in the | |
592 | * value for Ericsson when nothing is specified. | |
593 | */ | |
594 | if (hu->proto->setup) | |
595 | hdev->manufacturer = hu->proto->manufacturer; | |
596 | ||
1da177e4 LT |
597 | hdev->open = hci_uart_open; |
598 | hdev->close = hci_uart_close; | |
599 | hdev->flush = hci_uart_flush; | |
600 | hdev->send = hci_uart_send_frame; | |
eb173809 | 601 | hdev->setup = hci_uart_setup; |
6935e0f5 | 602 | SET_HCIDEV_DEV(hdev, hu->tty->dev); |
1da177e4 | 603 | |
63c7d09c JH |
604 | if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags)) |
605 | set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks); | |
606 | ||
6afd04ad MH |
607 | if (test_bit(HCI_UART_EXT_CONFIG, &hu->hdev_flags)) |
608 | set_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks); | |
609 | ||
a55e1f38 | 610 | if (!test_bit(HCI_UART_RESET_ON_INIT, &hu->hdev_flags)) |
a6c511c6 | 611 | set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks); |
a55e1f38 | 612 | |
8a7a3fd6 MH |
613 | if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags)) |
614 | hdev->dev_type = HCI_AMP; | |
615 | else | |
616 | hdev->dev_type = HCI_BREDR; | |
617 | ||
9f2aee84 JH |
618 | if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) |
619 | return 0; | |
620 | ||
1da177e4 LT |
621 | if (hci_register_dev(hdev) < 0) { |
622 | BT_ERR("Can't register HCI device"); | |
623 | hci_free_dev(hdev); | |
624 | return -ENODEV; | |
625 | } | |
626 | ||
9f2aee84 JH |
627 | set_bit(HCI_UART_REGISTERED, &hu->flags); |
628 | ||
1da177e4 LT |
629 | return 0; |
630 | } | |
631 | ||
632 | static int hci_uart_set_proto(struct hci_uart *hu, int id) | |
633 | { | |
4ee7ef19 | 634 | const struct hci_uart_proto *p; |
0372a662 MH |
635 | int err; |
636 | ||
1da177e4 LT |
637 | p = hci_uart_get_proto(id); |
638 | if (!p) | |
639 | return -EPROTONOSUPPORT; | |
640 | ||
641 | err = p->open(hu); | |
642 | if (err) | |
643 | return err; | |
644 | ||
645 | hu->proto = p; | |
646 | ||
647 | err = hci_uart_register_dev(hu); | |
648 | if (err) { | |
649 | p->close(hu); | |
650 | return err; | |
651 | } | |
0372a662 | 652 | |
1da177e4 LT |
653 | return 0; |
654 | } | |
655 | ||
bb72bd68 MH |
656 | static int hci_uart_set_flags(struct hci_uart *hu, unsigned long flags) |
657 | { | |
658 | unsigned long valid_flags = BIT(HCI_UART_RAW_DEVICE) | | |
659 | BIT(HCI_UART_RESET_ON_INIT) | | |
660 | BIT(HCI_UART_CREATE_AMP) | | |
6afd04ad | 661 | BIT(HCI_UART_INIT_PENDING) | |
fb2ce8d1 MH |
662 | BIT(HCI_UART_EXT_CONFIG) | |
663 | BIT(HCI_UART_VND_DETECT); | |
bb72bd68 | 664 | |
41533fe5 | 665 | if (flags & ~valid_flags) |
bb72bd68 MH |
666 | return -EINVAL; |
667 | ||
668 | hu->hdev_flags = flags; | |
669 | ||
670 | return 0; | |
671 | } | |
672 | ||
1da177e4 LT |
673 | /* hci_uart_tty_ioctl() |
674 | * | |
675 | * Process IOCTL system call for the tty device. | |
676 | * | |
677 | * Arguments: | |
678 | * | |
679 | * tty pointer to tty instance data | |
680 | * file pointer to open file object for device | |
681 | * cmd IOCTL command code | |
682 | * arg argument for IOCTL call (cmd dependent) | |
683 | * | |
684 | * Return Value: Command dependent | |
685 | */ | |
facf5225 MH |
686 | static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file *file, |
687 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 688 | { |
dfe19d28 | 689 | struct hci_uart *hu = tty->disc_data; |
1da177e4 LT |
690 | int err = 0; |
691 | ||
692 | BT_DBG(""); | |
693 | ||
694 | /* Verify the status of the device */ | |
695 | if (!hu) | |
696 | return -EBADF; | |
697 | ||
698 | switch (cmd) { | |
699 | case HCIUARTSETPROTO: | |
700 | if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) { | |
701 | err = hci_uart_set_proto(hu, arg); | |
702 | if (err) { | |
703 | clear_bit(HCI_UART_PROTO_SET, &hu->flags); | |
704 | return err; | |
705 | } | |
0372a662 | 706 | } else |
1da177e4 | 707 | return -EBUSY; |
c33be3c3 | 708 | break; |
1da177e4 LT |
709 | |
710 | case HCIUARTGETPROTO: | |
711 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
712 | return hu->proto->id; | |
713 | return -EUNATCH; | |
0372a662 | 714 | |
d2158744 | 715 | case HCIUARTGETDEVICE: |
c7e0c141 | 716 | if (test_bit(HCI_UART_REGISTERED, &hu->flags)) |
d2158744 MH |
717 | return hu->hdev->id; |
718 | return -EUNATCH; | |
719 | ||
63c7d09c JH |
720 | case HCIUARTSETFLAGS: |
721 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
722 | return -EBUSY; | |
bb72bd68 MH |
723 | err = hci_uart_set_flags(hu, arg); |
724 | if (err) | |
725 | return err; | |
63c7d09c JH |
726 | break; |
727 | ||
728 | case HCIUARTGETFLAGS: | |
729 | return hu->hdev_flags; | |
730 | ||
1da177e4 | 731 | default: |
47afa7a5 | 732 | err = n_tty_ioctl_helper(tty, file, cmd, arg); |
1da177e4 | 733 | break; |
a20890d0 | 734 | } |
1da177e4 LT |
735 | |
736 | return err; | |
737 | } | |
738 | ||
739 | /* | |
740 | * We don't provide read/write/poll interface for user space. | |
741 | */ | |
0372a662 | 742 | static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file, |
facf5225 | 743 | unsigned char __user *buf, size_t nr) |
1da177e4 LT |
744 | { |
745 | return 0; | |
746 | } | |
0372a662 MH |
747 | |
748 | static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file, | |
facf5225 | 749 | const unsigned char *data, size_t count) |
1da177e4 LT |
750 | { |
751 | return 0; | |
752 | } | |
0372a662 MH |
753 | |
754 | static unsigned int hci_uart_tty_poll(struct tty_struct *tty, | |
facf5225 | 755 | struct file *filp, poll_table *wait) |
1da177e4 LT |
756 | { |
757 | return 0; | |
758 | } | |
759 | ||
1da177e4 LT |
760 | static int __init hci_uart_init(void) |
761 | { | |
a352def2 | 762 | static struct tty_ldisc_ops hci_uart_ldisc; |
1da177e4 LT |
763 | int err; |
764 | ||
765 | BT_INFO("HCI UART driver ver %s", VERSION); | |
766 | ||
767 | /* Register the tty discipline */ | |
768 | ||
acf50c5f | 769 | memset(&hci_uart_ldisc, 0, sizeof(hci_uart_ldisc)); |
0372a662 MH |
770 | hci_uart_ldisc.magic = TTY_LDISC_MAGIC; |
771 | hci_uart_ldisc.name = "n_hci"; | |
772 | hci_uart_ldisc.open = hci_uart_tty_open; | |
773 | hci_uart_ldisc.close = hci_uart_tty_close; | |
774 | hci_uart_ldisc.read = hci_uart_tty_read; | |
775 | hci_uart_ldisc.write = hci_uart_tty_write; | |
776 | hci_uart_ldisc.ioctl = hci_uart_tty_ioctl; | |
777 | hci_uart_ldisc.poll = hci_uart_tty_poll; | |
0372a662 MH |
778 | hci_uart_ldisc.receive_buf = hci_uart_tty_receive; |
779 | hci_uart_ldisc.write_wakeup = hci_uart_tty_wakeup; | |
780 | hci_uart_ldisc.owner = THIS_MODULE; | |
1da177e4 | 781 | |
a08b15e6 VI |
782 | err = tty_register_ldisc(N_HCI, &hci_uart_ldisc); |
783 | if (err) { | |
1da177e4 LT |
784 | BT_ERR("HCI line discipline registration failed. (%d)", err); |
785 | return err; | |
786 | } | |
787 | ||
788 | #ifdef CONFIG_BT_HCIUART_H4 | |
789 | h4_init(); | |
790 | #endif | |
791 | #ifdef CONFIG_BT_HCIUART_BCSP | |
792 | bcsp_init(); | |
793 | #endif | |
166d2f6a OBC |
794 | #ifdef CONFIG_BT_HCIUART_LL |
795 | ll_init(); | |
796 | #endif | |
b3190df6 SS |
797 | #ifdef CONFIG_BT_HCIUART_ATH3K |
798 | ath_init(); | |
799 | #endif | |
7dec65c8 JH |
800 | #ifdef CONFIG_BT_HCIUART_3WIRE |
801 | h5_init(); | |
802 | #endif | |
ca93cee5 LP |
803 | #ifdef CONFIG_BT_HCIUART_INTEL |
804 | intel_init(); | |
805 | #endif | |
bdd8818e MH |
806 | #ifdef CONFIG_BT_HCIUART_BCM |
807 | bcm_init(); | |
808 | #endif | |
0ff252c1 BYTK |
809 | #ifdef CONFIG_BT_HCIUART_QCA |
810 | qca_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 | |
1da177e4 LT |
844 | |
845 | /* Release tty registration of line discipline */ | |
a08b15e6 VI |
846 | err = tty_unregister_ldisc(N_HCI); |
847 | if (err) | |
1da177e4 LT |
848 | BT_ERR("Can't unregister HCI line discipline (%d)", err); |
849 | } | |
850 | ||
851 | module_init(hci_uart_init); | |
852 | module_exit(hci_uart_exit); | |
853 | ||
63fbd24e | 854 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
855 | MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION); |
856 | MODULE_VERSION(VERSION); | |
857 | MODULE_LICENSE("GPL"); | |
858 | MODULE_ALIAS_LDISC(N_HCI); |