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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> |
7841d554 | 44 | #include <linux/serdev.h> |
1da177e4 LT |
45 | |
46 | #include <net/bluetooth/bluetooth.h> | |
47 | #include <net/bluetooth/hci_core.h> | |
48 | ||
bca03c95 | 49 | #include "btintel.h" |
3e0ac12a | 50 | #include "btbcm.h" |
1da177e4 LT |
51 | #include "hci_uart.h" |
52 | ||
788a6756 | 53 | #define VERSION "2.3" |
0372a662 | 54 | |
4ee7ef19 | 55 | static const struct hci_uart_proto *hup[HCI_UART_MAX_PROTO]; |
1da177e4 | 56 | |
4ee7ef19 | 57 | int hci_uart_register_proto(const struct hci_uart_proto *p) |
1da177e4 LT |
58 | { |
59 | if (p->id >= HCI_UART_MAX_PROTO) | |
60 | return -EINVAL; | |
61 | ||
62 | if (hup[p->id]) | |
63 | return -EEXIST; | |
64 | ||
65 | hup[p->id] = p; | |
0372a662 | 66 | |
01009eec MH |
67 | BT_INFO("HCI UART protocol %s registered", p->name); |
68 | ||
1da177e4 LT |
69 | return 0; |
70 | } | |
71 | ||
4ee7ef19 | 72 | int hci_uart_unregister_proto(const struct hci_uart_proto *p) |
1da177e4 LT |
73 | { |
74 | if (p->id >= HCI_UART_MAX_PROTO) | |
75 | return -EINVAL; | |
76 | ||
77 | if (!hup[p->id]) | |
78 | return -EINVAL; | |
79 | ||
80 | hup[p->id] = NULL; | |
0372a662 | 81 | |
1da177e4 LT |
82 | return 0; |
83 | } | |
84 | ||
4ee7ef19 | 85 | static const struct hci_uart_proto *hci_uart_get_proto(unsigned int id) |
1da177e4 LT |
86 | { |
87 | if (id >= HCI_UART_MAX_PROTO) | |
88 | return NULL; | |
0372a662 | 89 | |
1da177e4 LT |
90 | return hup[id]; |
91 | } | |
92 | ||
93 | static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type) | |
94 | { | |
95 | struct hci_dev *hdev = hu->hdev; | |
0372a662 | 96 | |
1da177e4 LT |
97 | /* Update HCI stat counters */ |
98 | switch (pkt_type) { | |
99 | case HCI_COMMAND_PKT: | |
100 | hdev->stat.cmd_tx++; | |
101 | break; | |
102 | ||
103 | case HCI_ACLDATA_PKT: | |
104 | hdev->stat.acl_tx++; | |
105 | break; | |
106 | ||
107 | case HCI_SCODATA_PKT: | |
7f8f2729 | 108 | hdev->stat.sco_tx++; |
1da177e4 LT |
109 | break; |
110 | } | |
111 | } | |
112 | ||
113 | static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu) | |
114 | { | |
115 | struct sk_buff *skb = hu->tx_skb; | |
0372a662 | 116 | |
048e1bd3 | 117 | if (!skb) { |
67d2f878 | 118 | percpu_down_read(&hu->proto_lock); |
dec2c928 | 119 | |
048e1bd3 DJ |
120 | if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) |
121 | skb = hu->proto->dequeue(hu); | |
dec2c928 | 122 | |
67d2f878 | 123 | percpu_up_read(&hu->proto_lock); |
048e1bd3 | 124 | } else { |
1da177e4 | 125 | hu->tx_skb = NULL; |
048e1bd3 | 126 | } |
0372a662 | 127 | |
1da177e4 LT |
128 | return skb; |
129 | } | |
130 | ||
131 | int hci_uart_tx_wakeup(struct hci_uart *hu) | |
132 | { | |
67d2f878 RT |
133 | /* This may be called in an IRQ context, so we can't sleep. Therefore |
134 | * we try to acquire the lock only, and if that fails we assume the | |
135 | * tty is being closed because that is the only time the write lock is | |
136 | * acquired. If, however, at some point in the future the write lock | |
137 | * is also acquired in other situations, then this must be revisited. | |
138 | */ | |
139 | if (!percpu_down_read_trylock(&hu->proto_lock)) | |
140 | return 0; | |
dec2c928 | 141 | |
2d6f1da1 | 142 | if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) |
dec2c928 | 143 | goto no_schedule; |
2d6f1da1 | 144 | |
1da177e4 LT |
145 | if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state)) { |
146 | set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); | |
dec2c928 | 147 | goto no_schedule; |
1da177e4 LT |
148 | } |
149 | ||
150 | BT_DBG(""); | |
151 | ||
da64c27d FB |
152 | schedule_work(&hu->write_work); |
153 | ||
dec2c928 | 154 | no_schedule: |
67d2f878 | 155 | percpu_up_read(&hu->proto_lock); |
dec2c928 | 156 | |
da64c27d FB |
157 | return 0; |
158 | } | |
081f36a8 | 159 | EXPORT_SYMBOL_GPL(hci_uart_tx_wakeup); |
da64c27d FB |
160 | |
161 | static void hci_uart_write_work(struct work_struct *work) | |
162 | { | |
163 | struct hci_uart *hu = container_of(work, struct hci_uart, write_work); | |
164 | struct tty_struct *tty = hu->tty; | |
165 | struct hci_dev *hdev = hu->hdev; | |
166 | struct sk_buff *skb; | |
167 | ||
168 | /* REVISIT: should we cope with bad skbs or ->write() returning | |
169 | * and error value ? | |
170 | */ | |
171 | ||
1da177e4 LT |
172 | restart: |
173 | clear_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); | |
174 | ||
175 | while ((skb = hci_uart_dequeue(hu))) { | |
176 | int len; | |
0372a662 | 177 | |
1da177e4 | 178 | set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); |
f34d7a5b | 179 | len = tty->ops->write(tty, skb->data, skb->len); |
1da177e4 LT |
180 | hdev->stat.byte_tx += len; |
181 | ||
182 | skb_pull(skb, len); | |
183 | if (skb->len) { | |
184 | hu->tx_skb = skb; | |
185 | break; | |
186 | } | |
0372a662 | 187 | |
618e8bc2 | 188 | hci_uart_tx_complete(hu, hci_skb_pkt_type(skb)); |
1da177e4 | 189 | kfree_skb(skb); |
0372a662 MH |
190 | } |
191 | ||
1da177e4 LT |
192 | if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state)) |
193 | goto restart; | |
194 | ||
195 | clear_bit(HCI_UART_SENDING, &hu->tx_state); | |
1da177e4 LT |
196 | } |
197 | ||
9f2aee84 JH |
198 | static void hci_uart_init_work(struct work_struct *work) |
199 | { | |
200 | struct hci_uart *hu = container_of(work, struct hci_uart, init_ready); | |
201 | int err; | |
a225b8c7 | 202 | struct hci_dev *hdev; |
9f2aee84 JH |
203 | |
204 | if (!test_and_clear_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) | |
205 | return; | |
206 | ||
207 | err = hci_register_dev(hu->hdev); | |
208 | if (err < 0) { | |
209 | BT_ERR("Can't register HCI device"); | |
a225b8c7 | 210 | hdev = hu->hdev; |
9f2aee84 | 211 | hu->hdev = NULL; |
a225b8c7 | 212 | hci_free_dev(hdev); |
d160b74d | 213 | clear_bit(HCI_UART_PROTO_READY, &hu->flags); |
9f2aee84 | 214 | hu->proto->close(hu); |
cb926520 | 215 | return; |
9f2aee84 JH |
216 | } |
217 | ||
218 | set_bit(HCI_UART_REGISTERED, &hu->flags); | |
219 | } | |
220 | ||
221 | int hci_uart_init_ready(struct hci_uart *hu) | |
222 | { | |
223 | if (!test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) | |
224 | return -EALREADY; | |
225 | ||
226 | schedule_work(&hu->init_ready); | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
1da177e4 LT |
231 | /* ------- Interface to HCI layer ------ */ |
232 | /* Initialize device */ | |
233 | static int hci_uart_open(struct hci_dev *hdev) | |
234 | { | |
235 | BT_DBG("%s %p", hdev->name, hdev); | |
236 | ||
237 | /* Nothing to do for UART driver */ | |
1da177e4 LT |
238 | return 0; |
239 | } | |
240 | ||
241 | /* Reset device */ | |
242 | static int hci_uart_flush(struct hci_dev *hdev) | |
243 | { | |
155961e8 | 244 | struct hci_uart *hu = hci_get_drvdata(hdev); |
1da177e4 LT |
245 | struct tty_struct *tty = hu->tty; |
246 | ||
247 | BT_DBG("hdev %p tty %p", hdev, tty); | |
248 | ||
249 | if (hu->tx_skb) { | |
250 | kfree_skb(hu->tx_skb); hu->tx_skb = NULL; | |
251 | } | |
252 | ||
253 | /* Flush any pending characters in the driver and discipline. */ | |
254 | tty_ldisc_flush(tty); | |
f34d7a5b | 255 | tty_driver_flush_buffer(tty); |
1da177e4 | 256 | |
67d2f878 | 257 | percpu_down_read(&hu->proto_lock); |
dec2c928 | 258 | |
84cb3df0 | 259 | if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) |
1da177e4 LT |
260 | hu->proto->flush(hu); |
261 | ||
67d2f878 | 262 | percpu_up_read(&hu->proto_lock); |
dec2c928 | 263 | |
1da177e4 LT |
264 | return 0; |
265 | } | |
266 | ||
267 | /* Close device */ | |
268 | static int hci_uart_close(struct hci_dev *hdev) | |
269 | { | |
270 | BT_DBG("hdev %p", hdev); | |
271 | ||
1da177e4 | 272 | hci_uart_flush(hdev); |
3611f4d2 | 273 | hdev->flush = NULL; |
1da177e4 LT |
274 | return 0; |
275 | } | |
276 | ||
277 | /* Send frames from HCI layer */ | |
7bd8f09f | 278 | static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb) |
1da177e4 | 279 | { |
52bc423a | 280 | struct hci_uart *hu = hci_get_drvdata(hdev); |
1da177e4 | 281 | |
618e8bc2 MH |
282 | BT_DBG("%s: type %d len %d", hdev->name, hci_skb_pkt_type(skb), |
283 | skb->len); | |
1da177e4 | 284 | |
67d2f878 | 285 | percpu_down_read(&hu->proto_lock); |
dec2c928 DJ |
286 | |
287 | if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) { | |
67d2f878 | 288 | percpu_up_read(&hu->proto_lock); |
ab00f89f | 289 | return -EUNATCH; |
dec2c928 | 290 | } |
ab00f89f | 291 | |
1da177e4 | 292 | hu->proto->enqueue(hu, skb); |
67d2f878 | 293 | percpu_up_read(&hu->proto_lock); |
1da177e4 LT |
294 | |
295 | hci_uart_tx_wakeup(hu); | |
0372a662 | 296 | |
1da177e4 LT |
297 | return 0; |
298 | } | |
299 | ||
2a973dfa IF |
300 | /* Flow control or un-flow control the device */ |
301 | void hci_uart_set_flow_control(struct hci_uart *hu, bool enable) | |
302 | { | |
303 | struct tty_struct *tty = hu->tty; | |
304 | struct ktermios ktermios; | |
305 | int status; | |
306 | unsigned int set = 0; | |
307 | unsigned int clear = 0; | |
308 | ||
7841d554 HG |
309 | if (hu->serdev) { |
310 | serdev_device_set_flow_control(hu->serdev, !enable); | |
311 | serdev_device_set_rts(hu->serdev, !enable); | |
312 | return; | |
313 | } | |
314 | ||
2a973dfa IF |
315 | if (enable) { |
316 | /* Disable hardware flow control */ | |
317 | ktermios = tty->termios; | |
318 | ktermios.c_cflag &= ~CRTSCTS; | |
319 | status = tty_set_termios(tty, &ktermios); | |
320 | BT_DBG("Disabling hardware flow control: %s", | |
321 | status ? "failed" : "success"); | |
322 | ||
323 | /* Clear RTS to prevent the device from sending */ | |
324 | /* Most UARTs need OUT2 to enable interrupts */ | |
325 | status = tty->driver->ops->tiocmget(tty); | |
326 | BT_DBG("Current tiocm 0x%x", status); | |
327 | ||
328 | set &= ~(TIOCM_OUT2 | TIOCM_RTS); | |
329 | clear = ~set; | |
330 | set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | | |
331 | TIOCM_OUT2 | TIOCM_LOOP; | |
332 | clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | | |
333 | TIOCM_OUT2 | TIOCM_LOOP; | |
334 | status = tty->driver->ops->tiocmset(tty, set, clear); | |
335 | BT_DBG("Clearing RTS: %s", status ? "failed" : "success"); | |
336 | } else { | |
337 | /* Set RTS to allow the device to send again */ | |
338 | status = tty->driver->ops->tiocmget(tty); | |
339 | BT_DBG("Current tiocm 0x%x", status); | |
340 | ||
341 | set |= (TIOCM_OUT2 | TIOCM_RTS); | |
342 | clear = ~set; | |
343 | set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | | |
344 | TIOCM_OUT2 | TIOCM_LOOP; | |
345 | clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | | |
346 | TIOCM_OUT2 | TIOCM_LOOP; | |
347 | status = tty->driver->ops->tiocmset(tty, set, clear); | |
348 | BT_DBG("Setting RTS: %s", status ? "failed" : "success"); | |
349 | ||
350 | /* Re-enable hardware flow control */ | |
351 | ktermios = tty->termios; | |
352 | ktermios.c_cflag |= CRTSCTS; | |
353 | status = tty_set_termios(tty, &ktermios); | |
354 | BT_DBG("Enabling hardware flow control: %s", | |
355 | status ? "failed" : "success"); | |
356 | } | |
357 | } | |
358 | ||
359 | void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed, | |
360 | unsigned int oper_speed) | |
361 | { | |
362 | hu->init_speed = init_speed; | |
363 | hu->oper_speed = oper_speed; | |
364 | } | |
365 | ||
7721383f FD |
366 | void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed) |
367 | { | |
368 | struct tty_struct *tty = hu->tty; | |
369 | struct ktermios ktermios; | |
370 | ||
371 | ktermios = tty->termios; | |
372 | ktermios.c_cflag &= ~CBAUD; | |
7721383f FD |
373 | tty_termios_encode_baud_rate(&ktermios, speed, speed); |
374 | ||
375 | /* tty_set_termios() return not checked as it is always 0 */ | |
376 | tty_set_termios(tty, &ktermios); | |
377 | ||
2a973dfa IF |
378 | BT_DBG("%s: New tty speeds: %d/%d", hu->hdev->name, |
379 | tty->termios.c_ispeed, tty->termios.c_ospeed); | |
7721383f FD |
380 | } |
381 | ||
eb173809 LP |
382 | static int hci_uart_setup(struct hci_dev *hdev) |
383 | { | |
384 | struct hci_uart *hu = hci_get_drvdata(hdev); | |
fb2ce8d1 MH |
385 | struct hci_rp_read_local_version *ver; |
386 | struct sk_buff *skb; | |
2a973dfa | 387 | unsigned int speed; |
7721383f FD |
388 | int err; |
389 | ||
2a973dfa | 390 | /* Init speed if any */ |
960ef1d7 | 391 | if (hu->init_speed) |
2a973dfa | 392 | speed = hu->init_speed; |
960ef1d7 FD |
393 | else if (hu->proto->init_speed) |
394 | speed = hu->proto->init_speed; | |
2a973dfa IF |
395 | else |
396 | speed = 0; | |
397 | ||
398 | if (speed) | |
399 | hci_uart_set_baudrate(hu, speed); | |
400 | ||
401 | /* Operational speed if any */ | |
960ef1d7 | 402 | if (hu->oper_speed) |
2a973dfa | 403 | speed = hu->oper_speed; |
960ef1d7 FD |
404 | else if (hu->proto->oper_speed) |
405 | speed = hu->proto->oper_speed; | |
2a973dfa IF |
406 | else |
407 | speed = 0; | |
7721383f | 408 | |
2a973dfa IF |
409 | if (hu->proto->set_baudrate && speed) { |
410 | err = hu->proto->set_baudrate(hu, speed); | |
7721383f | 411 | if (!err) |
2a973dfa | 412 | hci_uart_set_baudrate(hu, speed); |
7721383f | 413 | } |
eb173809 LP |
414 | |
415 | if (hu->proto->setup) | |
416 | return hu->proto->setup(hu); | |
417 | ||
fb2ce8d1 MH |
418 | if (!test_bit(HCI_UART_VND_DETECT, &hu->hdev_flags)) |
419 | return 0; | |
420 | ||
421 | skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL, | |
422 | HCI_INIT_TIMEOUT); | |
423 | if (IS_ERR(skb)) { | |
424 | BT_ERR("%s: Reading local version information failed (%ld)", | |
425 | hdev->name, PTR_ERR(skb)); | |
426 | return 0; | |
427 | } | |
428 | ||
429 | if (skb->len != sizeof(*ver)) { | |
430 | BT_ERR("%s: Event length mismatch for version information", | |
431 | hdev->name); | |
432 | goto done; | |
433 | } | |
434 | ||
435 | ver = (struct hci_rp_read_local_version *)skb->data; | |
436 | ||
437 | switch (le16_to_cpu(ver->manufacturer)) { | |
16e3887f MH |
438 | #ifdef CONFIG_BT_HCIUART_INTEL |
439 | case 2: | |
bca03c95 MH |
440 | hdev->set_bdaddr = btintel_set_bdaddr; |
441 | btintel_check_bdaddr(hdev); | |
16e3887f | 442 | break; |
e9a2dd26 MH |
443 | #endif |
444 | #ifdef CONFIG_BT_HCIUART_BCM | |
445 | case 15: | |
3e0ac12a MH |
446 | hdev->set_bdaddr = btbcm_set_bdaddr; |
447 | btbcm_check_bdaddr(hdev); | |
e9a2dd26 | 448 | break; |
16e3887f | 449 | #endif |
fb2ce8d1 MH |
450 | } |
451 | ||
452 | done: | |
453 | kfree_skb(skb); | |
eb173809 LP |
454 | return 0; |
455 | } | |
456 | ||
1da177e4 LT |
457 | /* ------ LDISC part ------ */ |
458 | /* hci_uart_tty_open | |
1687dfc3 | 459 | * |
1da177e4 LT |
460 | * Called when line discipline changed to HCI_UART. |
461 | * | |
462 | * Arguments: | |
463 | * tty pointer to tty info structure | |
1687dfc3 | 464 | * Return Value: |
1da177e4 LT |
465 | * 0 if success, otherwise error code |
466 | */ | |
467 | static int hci_uart_tty_open(struct tty_struct *tty) | |
468 | { | |
f327b340 | 469 | struct hci_uart *hu; |
1da177e4 LT |
470 | |
471 | BT_DBG("tty %p", tty); | |
472 | ||
c19483cc | 473 | /* Error if the tty has no write op instead of leaving an exploitable |
d98422cb DR |
474 | * hole |
475 | */ | |
c19483cc AC |
476 | if (tty->ops->write == NULL) |
477 | return -EOPNOTSUPP; | |
478 | ||
a08b15e6 VI |
479 | hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL); |
480 | if (!hu) { | |
7785162c | 481 | BT_ERR("Can't allocate control structure"); |
1da177e4 LT |
482 | return -ENFILE; |
483 | } | |
0372a662 | 484 | |
1da177e4 LT |
485 | tty->disc_data = hu; |
486 | hu->tty = tty; | |
33f0f88f | 487 | tty->receive_room = 65536; |
1da177e4 | 488 | |
aeac3014 SR |
489 | /* disable alignment support by default */ |
490 | hu->alignment = 1; | |
491 | hu->padding = 0; | |
492 | ||
9f2aee84 | 493 | INIT_WORK(&hu->init_ready, hci_uart_init_work); |
da64c27d | 494 | INIT_WORK(&hu->write_work, hci_uart_write_work); |
9f2aee84 | 495 | |
67d2f878 | 496 | percpu_init_rwsem(&hu->proto_lock); |
dec2c928 | 497 | |
e6e981c7 | 498 | /* Flush any pending characters in the driver */ |
f34d7a5b | 499 | tty_driver_flush_buffer(tty); |
1da177e4 LT |
500 | |
501 | return 0; | |
502 | } | |
503 | ||
504 | /* hci_uart_tty_close() | |
505 | * | |
506 | * Called when the line discipline is changed to something | |
507 | * else, the tty is closed, or the tty detects a hangup. | |
508 | */ | |
509 | static void hci_uart_tty_close(struct tty_struct *tty) | |
510 | { | |
dfe19d28 | 511 | struct hci_uart *hu = tty->disc_data; |
dac670b9 | 512 | struct hci_dev *hdev; |
1da177e4 LT |
513 | |
514 | BT_DBG("tty %p", tty); | |
515 | ||
516 | /* Detach from the tty */ | |
517 | tty->disc_data = NULL; | |
518 | ||
dac670b9 JH |
519 | if (!hu) |
520 | return; | |
22ad4203 | 521 | |
dac670b9 JH |
522 | hdev = hu->hdev; |
523 | if (hdev) | |
524 | hci_uart_close(hdev); | |
1da177e4 | 525 | |
dec2c928 | 526 | if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) { |
67d2f878 | 527 | percpu_down_write(&hu->proto_lock); |
dec2c928 | 528 | clear_bit(HCI_UART_PROTO_READY, &hu->flags); |
67d2f878 | 529 | percpu_up_write(&hu->proto_lock); |
dec2c928 | 530 | |
0338b1b3 RT |
531 | cancel_work_sync(&hu->write_work); |
532 | ||
dac670b9 | 533 | if (hdev) { |
9f2aee84 JH |
534 | if (test_bit(HCI_UART_REGISTERED, &hu->flags)) |
535 | hci_unregister_dev(hdev); | |
dac670b9 | 536 | hci_free_dev(hdev); |
1da177e4 | 537 | } |
dac670b9 | 538 | hu->proto->close(hu); |
1da177e4 | 539 | } |
84cb3df0 | 540 | clear_bit(HCI_UART_PROTO_SET, &hu->flags); |
dac670b9 JH |
541 | |
542 | kfree(hu); | |
1da177e4 LT |
543 | } |
544 | ||
545 | /* hci_uart_tty_wakeup() | |
546 | * | |
547 | * Callback for transmit wakeup. Called when low level | |
548 | * device driver can accept more send data. | |
549 | * | |
550 | * Arguments: tty pointer to associated tty instance data | |
551 | * Return Value: None | |
552 | */ | |
553 | static void hci_uart_tty_wakeup(struct tty_struct *tty) | |
554 | { | |
dfe19d28 | 555 | struct hci_uart *hu = tty->disc_data; |
1da177e4 LT |
556 | |
557 | BT_DBG(""); | |
558 | ||
559 | if (!hu) | |
560 | return; | |
561 | ||
562 | clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); | |
563 | ||
564 | if (tty != hu->tty) | |
565 | return; | |
566 | ||
84cb3df0 | 567 | if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) |
1da177e4 LT |
568 | hci_uart_tx_wakeup(hu); |
569 | } | |
570 | ||
1da177e4 | 571 | /* hci_uart_tty_receive() |
1687dfc3 | 572 | * |
1da177e4 LT |
573 | * Called by tty low level driver when receive data is |
574 | * available. | |
1687dfc3 | 575 | * |
1da177e4 LT |
576 | * Arguments: tty pointer to tty isntance data |
577 | * data pointer to received data | |
578 | * flags pointer to flags for data | |
579 | * count count of received data in bytes | |
1687dfc3 | 580 | * |
55db4c64 | 581 | * Return Value: None |
1da177e4 | 582 | */ |
facf5225 MH |
583 | static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data, |
584 | char *flags, int count) | |
1da177e4 | 585 | { |
dfe19d28 | 586 | struct hci_uart *hu = tty->disc_data; |
0372a662 | 587 | |
1da177e4 | 588 | if (!hu || tty != hu->tty) |
55db4c64 | 589 | return; |
1da177e4 | 590 | |
67d2f878 | 591 | percpu_down_read(&hu->proto_lock); |
dec2c928 DJ |
592 | |
593 | if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) { | |
67d2f878 | 594 | percpu_up_read(&hu->proto_lock); |
55db4c64 | 595 | return; |
dec2c928 | 596 | } |
0372a662 | 597 | |
7649faff FD |
598 | /* It does not need a lock here as it is already protected by a mutex in |
599 | * tty caller | |
600 | */ | |
9d1c40eb | 601 | hu->proto->recv(hu, data, count); |
67d2f878 | 602 | percpu_up_read(&hu->proto_lock); |
788f0923 CP |
603 | |
604 | if (hu->hdev) | |
605 | hu->hdev->stat.byte_rx += count; | |
606 | ||
39c2e60f | 607 | tty_unthrottle(tty); |
1da177e4 LT |
608 | } |
609 | ||
610 | static int hci_uart_register_dev(struct hci_uart *hu) | |
611 | { | |
612 | struct hci_dev *hdev; | |
613 | ||
614 | BT_DBG(""); | |
615 | ||
616 | /* Initialize and register HCI device */ | |
617 | hdev = hci_alloc_dev(); | |
618 | if (!hdev) { | |
619 | BT_ERR("Can't allocate HCI device"); | |
620 | return -ENOMEM; | |
621 | } | |
622 | ||
623 | hu->hdev = hdev; | |
624 | ||
c13854ce | 625 | hdev->bus = HCI_UART; |
155961e8 | 626 | hci_set_drvdata(hdev, hu); |
1da177e4 | 627 | |
aee61f7a MH |
628 | /* Only when vendor specific setup callback is provided, consider |
629 | * the manufacturer information valid. This avoids filling in the | |
630 | * value for Ericsson when nothing is specified. | |
631 | */ | |
632 | if (hu->proto->setup) | |
633 | hdev->manufacturer = hu->proto->manufacturer; | |
634 | ||
1da177e4 LT |
635 | hdev->open = hci_uart_open; |
636 | hdev->close = hci_uart_close; | |
637 | hdev->flush = hci_uart_flush; | |
638 | hdev->send = hci_uart_send_frame; | |
eb173809 | 639 | hdev->setup = hci_uart_setup; |
6935e0f5 | 640 | SET_HCIDEV_DEV(hdev, hu->tty->dev); |
1da177e4 | 641 | |
63c7d09c JH |
642 | if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags)) |
643 | set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks); | |
644 | ||
6afd04ad MH |
645 | if (test_bit(HCI_UART_EXT_CONFIG, &hu->hdev_flags)) |
646 | set_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks); | |
647 | ||
a55e1f38 | 648 | if (!test_bit(HCI_UART_RESET_ON_INIT, &hu->hdev_flags)) |
a6c511c6 | 649 | set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks); |
a55e1f38 | 650 | |
8a7a3fd6 MH |
651 | if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags)) |
652 | hdev->dev_type = HCI_AMP; | |
653 | else | |
ca8bee5d | 654 | hdev->dev_type = HCI_PRIMARY; |
8a7a3fd6 | 655 | |
9f2aee84 JH |
656 | if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) |
657 | return 0; | |
658 | ||
1da177e4 LT |
659 | if (hci_register_dev(hdev) < 0) { |
660 | BT_ERR("Can't register HCI device"); | |
a225b8c7 | 661 | hu->hdev = NULL; |
1da177e4 LT |
662 | hci_free_dev(hdev); |
663 | return -ENODEV; | |
664 | } | |
665 | ||
9f2aee84 JH |
666 | set_bit(HCI_UART_REGISTERED, &hu->flags); |
667 | ||
1da177e4 LT |
668 | return 0; |
669 | } | |
670 | ||
671 | static int hci_uart_set_proto(struct hci_uart *hu, int id) | |
672 | { | |
4ee7ef19 | 673 | const struct hci_uart_proto *p; |
0372a662 MH |
674 | int err; |
675 | ||
1da177e4 LT |
676 | p = hci_uart_get_proto(id); |
677 | if (!p) | |
678 | return -EPROTONOSUPPORT; | |
679 | ||
680 | err = p->open(hu); | |
681 | if (err) | |
682 | return err; | |
683 | ||
684 | hu->proto = p; | |
84cb3df0 | 685 | set_bit(HCI_UART_PROTO_READY, &hu->flags); |
1da177e4 LT |
686 | |
687 | err = hci_uart_register_dev(hu); | |
688 | if (err) { | |
84cb3df0 | 689 | clear_bit(HCI_UART_PROTO_READY, &hu->flags); |
1da177e4 LT |
690 | p->close(hu); |
691 | return err; | |
692 | } | |
0372a662 | 693 | |
1da177e4 LT |
694 | return 0; |
695 | } | |
696 | ||
bb72bd68 MH |
697 | static int hci_uart_set_flags(struct hci_uart *hu, unsigned long flags) |
698 | { | |
699 | unsigned long valid_flags = BIT(HCI_UART_RAW_DEVICE) | | |
700 | BIT(HCI_UART_RESET_ON_INIT) | | |
701 | BIT(HCI_UART_CREATE_AMP) | | |
6afd04ad | 702 | BIT(HCI_UART_INIT_PENDING) | |
fb2ce8d1 MH |
703 | BIT(HCI_UART_EXT_CONFIG) | |
704 | BIT(HCI_UART_VND_DETECT); | |
bb72bd68 | 705 | |
41533fe5 | 706 | if (flags & ~valid_flags) |
bb72bd68 MH |
707 | return -EINVAL; |
708 | ||
709 | hu->hdev_flags = flags; | |
710 | ||
711 | return 0; | |
712 | } | |
713 | ||
1da177e4 LT |
714 | /* hci_uart_tty_ioctl() |
715 | * | |
716 | * Process IOCTL system call for the tty device. | |
717 | * | |
718 | * Arguments: | |
719 | * | |
720 | * tty pointer to tty instance data | |
721 | * file pointer to open file object for device | |
722 | * cmd IOCTL command code | |
723 | * arg argument for IOCTL call (cmd dependent) | |
724 | * | |
725 | * Return Value: Command dependent | |
726 | */ | |
facf5225 MH |
727 | static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file *file, |
728 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 729 | { |
dfe19d28 | 730 | struct hci_uart *hu = tty->disc_data; |
1da177e4 LT |
731 | int err = 0; |
732 | ||
733 | BT_DBG(""); | |
734 | ||
735 | /* Verify the status of the device */ | |
736 | if (!hu) | |
737 | return -EBADF; | |
738 | ||
739 | switch (cmd) { | |
740 | case HCIUARTSETPROTO: | |
741 | if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) { | |
742 | err = hci_uart_set_proto(hu, arg); | |
05650694 | 743 | if (err) |
1da177e4 | 744 | clear_bit(HCI_UART_PROTO_SET, &hu->flags); |
0372a662 | 745 | } else |
05650694 | 746 | err = -EBUSY; |
c33be3c3 | 747 | break; |
1da177e4 LT |
748 | |
749 | case HCIUARTGETPROTO: | |
750 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
05650694 VR |
751 | err = hu->proto->id; |
752 | else | |
753 | err = -EUNATCH; | |
754 | break; | |
0372a662 | 755 | |
d2158744 | 756 | case HCIUARTGETDEVICE: |
c7e0c141 | 757 | if (test_bit(HCI_UART_REGISTERED, &hu->flags)) |
05650694 VR |
758 | err = hu->hdev->id; |
759 | else | |
760 | err = -EUNATCH; | |
761 | break; | |
d2158744 | 762 | |
63c7d09c JH |
763 | case HCIUARTSETFLAGS: |
764 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) | |
05650694 VR |
765 | err = -EBUSY; |
766 | else | |
767 | err = hci_uart_set_flags(hu, arg); | |
63c7d09c JH |
768 | break; |
769 | ||
770 | case HCIUARTGETFLAGS: | |
05650694 VR |
771 | err = hu->hdev_flags; |
772 | break; | |
63c7d09c | 773 | |
1da177e4 | 774 | default: |
47afa7a5 | 775 | err = n_tty_ioctl_helper(tty, file, cmd, arg); |
1da177e4 | 776 | break; |
a20890d0 | 777 | } |
1da177e4 LT |
778 | |
779 | return err; | |
780 | } | |
781 | ||
782 | /* | |
783 | * We don't provide read/write/poll interface for user space. | |
784 | */ | |
0372a662 | 785 | static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file, |
facf5225 | 786 | unsigned char __user *buf, size_t nr) |
1da177e4 LT |
787 | { |
788 | return 0; | |
789 | } | |
0372a662 MH |
790 | |
791 | static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file, | |
facf5225 | 792 | const unsigned char *data, size_t count) |
1da177e4 LT |
793 | { |
794 | return 0; | |
795 | } | |
0372a662 MH |
796 | |
797 | static unsigned int hci_uart_tty_poll(struct tty_struct *tty, | |
facf5225 | 798 | struct file *filp, poll_table *wait) |
1da177e4 LT |
799 | { |
800 | return 0; | |
801 | } | |
802 | ||
1da177e4 LT |
803 | static int __init hci_uart_init(void) |
804 | { | |
a352def2 | 805 | static struct tty_ldisc_ops hci_uart_ldisc; |
1da177e4 LT |
806 | int err; |
807 | ||
808 | BT_INFO("HCI UART driver ver %s", VERSION); | |
809 | ||
810 | /* Register the tty discipline */ | |
811 | ||
acf50c5f | 812 | memset(&hci_uart_ldisc, 0, sizeof(hci_uart_ldisc)); |
0372a662 MH |
813 | hci_uart_ldisc.magic = TTY_LDISC_MAGIC; |
814 | hci_uart_ldisc.name = "n_hci"; | |
815 | hci_uart_ldisc.open = hci_uart_tty_open; | |
816 | hci_uart_ldisc.close = hci_uart_tty_close; | |
817 | hci_uart_ldisc.read = hci_uart_tty_read; | |
818 | hci_uart_ldisc.write = hci_uart_tty_write; | |
819 | hci_uart_ldisc.ioctl = hci_uart_tty_ioctl; | |
820 | hci_uart_ldisc.poll = hci_uart_tty_poll; | |
0372a662 MH |
821 | hci_uart_ldisc.receive_buf = hci_uart_tty_receive; |
822 | hci_uart_ldisc.write_wakeup = hci_uart_tty_wakeup; | |
823 | hci_uart_ldisc.owner = THIS_MODULE; | |
1da177e4 | 824 | |
a08b15e6 VI |
825 | err = tty_register_ldisc(N_HCI, &hci_uart_ldisc); |
826 | if (err) { | |
1da177e4 LT |
827 | BT_ERR("HCI line discipline registration failed. (%d)", err); |
828 | return err; | |
829 | } | |
830 | ||
831 | #ifdef CONFIG_BT_HCIUART_H4 | |
832 | h4_init(); | |
833 | #endif | |
834 | #ifdef CONFIG_BT_HCIUART_BCSP | |
835 | bcsp_init(); | |
836 | #endif | |
166d2f6a OBC |
837 | #ifdef CONFIG_BT_HCIUART_LL |
838 | ll_init(); | |
839 | #endif | |
b3190df6 SS |
840 | #ifdef CONFIG_BT_HCIUART_ATH3K |
841 | ath_init(); | |
842 | #endif | |
7dec65c8 JH |
843 | #ifdef CONFIG_BT_HCIUART_3WIRE |
844 | h5_init(); | |
845 | #endif | |
ca93cee5 LP |
846 | #ifdef CONFIG_BT_HCIUART_INTEL |
847 | intel_init(); | |
848 | #endif | |
bdd8818e MH |
849 | #ifdef CONFIG_BT_HCIUART_BCM |
850 | bcm_init(); | |
851 | #endif | |
0ff252c1 BYTK |
852 | #ifdef CONFIG_BT_HCIUART_QCA |
853 | qca_init(); | |
854 | #endif | |
395174bb LP |
855 | #ifdef CONFIG_BT_HCIUART_AG6XX |
856 | ag6xx_init(); | |
857 | #endif | |
162f812f LP |
858 | #ifdef CONFIG_BT_HCIUART_MRVL |
859 | mrvl_init(); | |
860 | #endif | |
166d2f6a | 861 | |
1da177e4 LT |
862 | return 0; |
863 | } | |
864 | ||
865 | static void __exit hci_uart_exit(void) | |
866 | { | |
867 | int err; | |
868 | ||
869 | #ifdef CONFIG_BT_HCIUART_H4 | |
870 | h4_deinit(); | |
871 | #endif | |
872 | #ifdef CONFIG_BT_HCIUART_BCSP | |
873 | bcsp_deinit(); | |
874 | #endif | |
166d2f6a OBC |
875 | #ifdef CONFIG_BT_HCIUART_LL |
876 | ll_deinit(); | |
877 | #endif | |
b3190df6 SS |
878 | #ifdef CONFIG_BT_HCIUART_ATH3K |
879 | ath_deinit(); | |
880 | #endif | |
7dec65c8 JH |
881 | #ifdef CONFIG_BT_HCIUART_3WIRE |
882 | h5_deinit(); | |
883 | #endif | |
ca93cee5 LP |
884 | #ifdef CONFIG_BT_HCIUART_INTEL |
885 | intel_deinit(); | |
886 | #endif | |
bdd8818e MH |
887 | #ifdef CONFIG_BT_HCIUART_BCM |
888 | bcm_deinit(); | |
889 | #endif | |
0ff252c1 BYTK |
890 | #ifdef CONFIG_BT_HCIUART_QCA |
891 | qca_deinit(); | |
892 | #endif | |
395174bb LP |
893 | #ifdef CONFIG_BT_HCIUART_AG6XX |
894 | ag6xx_deinit(); | |
895 | #endif | |
162f812f LP |
896 | #ifdef CONFIG_BT_HCIUART_MRVL |
897 | mrvl_deinit(); | |
898 | #endif | |
1da177e4 LT |
899 | |
900 | /* Release tty registration of line discipline */ | |
a08b15e6 VI |
901 | err = tty_unregister_ldisc(N_HCI); |
902 | if (err) | |
1da177e4 LT |
903 | BT_ERR("Can't unregister HCI line discipline (%d)", err); |
904 | } | |
905 | ||
906 | module_init(hci_uart_init); | |
907 | module_exit(hci_uart_exit); | |
908 | ||
63fbd24e | 909 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
910 | MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION); |
911 | MODULE_VERSION(VERSION); | |
912 | MODULE_LICENSE("GPL"); | |
913 | MODULE_ALIAS_LDISC(N_HCI); |