1 | /* $NetBSD: btuart.c,v 1.28 2015/08/20 14:40:17 christos Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2006, 2007 KIYOHARA Takashi |
5 | * All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
15 | * |
16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
18 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
19 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
20 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
21 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
22 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
24 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
25 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
26 | * POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
28 | |
29 | #include <sys/cdefs.h> |
30 | __KERNEL_RCSID(0, "$NetBSD: btuart.c,v 1.28 2015/08/20 14:40:17 christos Exp $" ); |
31 | |
32 | #include <sys/param.h> |
33 | #include <sys/conf.h> |
34 | #include <sys/device.h> |
35 | #include <sys/errno.h> |
36 | #include <sys/fcntl.h> |
37 | #include <sys/kauth.h> |
38 | #include <sys/kernel.h> |
39 | #include <sys/malloc.h> |
40 | #include <sys/mbuf.h> |
41 | #include <sys/proc.h> |
42 | #include <sys/syslimits.h> |
43 | #include <sys/systm.h> |
44 | #include <sys/tty.h> |
45 | |
46 | #include <sys/bus.h> |
47 | #include <sys/intr.h> |
48 | |
49 | #include <netbt/bluetooth.h> |
50 | #include <netbt/hci.h> |
51 | |
52 | #include "ioconf.h" |
53 | |
54 | struct btuart_softc { |
55 | device_t sc_dev; |
56 | struct tty * sc_tp; /* tty pointer */ |
57 | |
58 | bool sc_enabled; /* device is enabled */ |
59 | struct hci_unit *sc_unit; /* Bluetooth HCI handle */ |
60 | struct bt_stats sc_stats; |
61 | |
62 | int sc_state; /* receive state */ |
63 | int sc_want; /* how much we want */ |
64 | struct mbuf * sc_rxp; /* incoming packet */ |
65 | |
66 | bool sc_xmit; /* transmit is active */ |
67 | struct mbuf * sc_txp; /* outgoing packet */ |
68 | |
69 | /* transmit queues */ |
70 | MBUFQ_HEAD() sc_cmdq; |
71 | MBUFQ_HEAD() sc_aclq; |
72 | MBUFQ_HEAD() sc_scoq; |
73 | }; |
74 | |
75 | /* sc_state */ |
76 | #define BTUART_RECV_PKT_TYPE 0 /* packet type */ |
77 | #define BTUART_RECV_ACL_HDR 1 /* acl header */ |
78 | #define BTUART_RECV_SCO_HDR 2 /* sco header */ |
79 | #define BTUART_RECV_EVENT_HDR 3 /* event header */ |
80 | #define BTUART_RECV_ACL_DATA 4 /* acl packet data */ |
81 | #define BTUART_RECV_SCO_DATA 5 /* sco packet data */ |
82 | #define BTUART_RECV_EVENT_DATA 6 /* event packet data */ |
83 | |
84 | static int btuart_match(device_t, cfdata_t, void *); |
85 | static void btuart_attach(device_t, device_t, void *); |
86 | static int btuart_detach(device_t, int); |
87 | |
88 | static int btuartopen(dev_t, struct tty *); |
89 | static int btuartclose(struct tty *, int); |
90 | static int btuartioctl(struct tty *, u_long, void *, int, struct lwp *); |
91 | static int btuartinput(int, struct tty *); |
92 | static int btuartstart(struct tty *); |
93 | |
94 | static int btuart_enable(device_t); |
95 | static void btuart_disable(device_t); |
96 | static void btuart_output_cmd(device_t, struct mbuf *); |
97 | static void btuart_output_acl(device_t, struct mbuf *); |
98 | static void btuart_output_sco(device_t, struct mbuf *); |
99 | static void btuart_stats(device_t, struct bt_stats *, int); |
100 | |
101 | /* |
102 | * It doesn't need to be exported, as only btuartattach() uses it, |
103 | * but there's no "official" way to make it static. |
104 | */ |
105 | CFATTACH_DECL_NEW(btuart, sizeof(struct btuart_softc), |
106 | btuart_match, btuart_attach, btuart_detach, NULL); |
107 | |
108 | static struct linesw btuart_disc = { |
109 | .l_name = "btuart" , |
110 | .l_open = btuartopen, |
111 | .l_close = btuartclose, |
112 | .l_read = ttyerrio, |
113 | .l_write = ttyerrio, |
114 | .l_ioctl = btuartioctl, |
115 | .l_rint = btuartinput, |
116 | .l_start = btuartstart, |
117 | .l_modem = ttymodem, |
118 | .l_poll = ttyerrpoll, |
119 | }; |
120 | |
121 | static const struct hci_if btuart_hci = { |
122 | .enable = btuart_enable, |
123 | .disable = btuart_disable, |
124 | .output_cmd = btuart_output_cmd, |
125 | .output_acl = btuart_output_acl, |
126 | .output_sco = btuart_output_sco, |
127 | .get_stats = btuart_stats, |
128 | .ipl = IPL_TTY, |
129 | }; |
130 | |
131 | /***************************************************************************** |
132 | * |
133 | * autoconf(9) functions |
134 | */ |
135 | |
136 | /* |
137 | * pseudo-device attach routine. |
138 | */ |
139 | void |
140 | btuartattach(int num __unused) |
141 | { |
142 | int error; |
143 | |
144 | error = ttyldisc_attach(&btuart_disc); |
145 | if (error) { |
146 | aprint_error("%s: unable to register line discipline, " |
147 | "error = %d\n" , btuart_cd.cd_name, error); |
148 | |
149 | return; |
150 | } |
151 | |
152 | error = config_cfattach_attach(btuart_cd.cd_name, &btuart_ca); |
153 | if (error) { |
154 | aprint_error("%s: unable to register cfattach, error = %d\n" , |
155 | btuart_cd.cd_name, error); |
156 | |
157 | config_cfdriver_detach(&btuart_cd); |
158 | (void) ttyldisc_detach(&btuart_disc); |
159 | } |
160 | } |
161 | |
162 | /* |
163 | * Autoconf match routine. |
164 | */ |
165 | static int |
166 | btuart_match(device_t self __unused, cfdata_t cfdata __unused, |
167 | void *arg __unused) |
168 | { |
169 | |
170 | /* pseudo-device; always present */ |
171 | return 1; |
172 | } |
173 | |
174 | /* |
175 | * Autoconf attach routine. |
176 | * Called by config_attach_pseudo(9) when we open the line discipline. |
177 | */ |
178 | static void |
179 | btuart_attach(device_t parent __unused, device_t self, void *aux __unused) |
180 | { |
181 | struct btuart_softc *sc = device_private(self); |
182 | |
183 | sc->sc_dev = self; |
184 | |
185 | MBUFQ_INIT(&sc->sc_cmdq); |
186 | MBUFQ_INIT(&sc->sc_aclq); |
187 | MBUFQ_INIT(&sc->sc_scoq); |
188 | |
189 | /* Attach Bluetooth unit */ |
190 | sc->sc_unit = hci_attach_pcb(&btuart_hci, self, 0); |
191 | if (sc->sc_unit == NULL) |
192 | aprint_error_dev(self, "HCI attach failed\n" ); |
193 | } |
194 | |
195 | /* |
196 | * Autoconf detach routine. |
197 | * Called when we close the line discipline. |
198 | */ |
199 | static int |
200 | btuart_detach(device_t self, int flags __unused) |
201 | { |
202 | struct btuart_softc *sc = device_private(self); |
203 | |
204 | btuart_disable(self); |
205 | |
206 | if (sc->sc_unit) { |
207 | hci_detach_pcb(sc->sc_unit); |
208 | sc->sc_unit = NULL; |
209 | } |
210 | |
211 | return 0; |
212 | } |
213 | |
214 | /***************************************************************************** |
215 | * |
216 | * Line discipline functions. |
217 | */ |
218 | |
219 | static int |
220 | btuartopen(dev_t devno __unused, struct tty *tp) |
221 | { |
222 | struct btuart_softc *sc; |
223 | device_t dev; |
224 | cfdata_t cfdata; |
225 | struct lwp *l = curlwp; /* XXX */ |
226 | int error, unit, s; |
227 | |
228 | error = kauth_authorize_device(l->l_cred, KAUTH_DEVICE_BLUETOOTH_BTUART, |
229 | KAUTH_ARG(KAUTH_REQ_DEVICE_BLUETOOTH_BTUART_ADD), NULL, NULL, NULL); |
230 | if (error) |
231 | return (error); |
232 | |
233 | s = spltty(); |
234 | |
235 | if (tp->t_linesw == &btuart_disc) { |
236 | sc = tp->t_sc; |
237 | if (sc != NULL) { |
238 | splx(s); |
239 | return EBUSY; |
240 | } |
241 | } |
242 | |
243 | KASSERT(tp->t_oproc != NULL); |
244 | |
245 | cfdata = malloc(sizeof(struct cfdata), M_DEVBUF, M_WAITOK); |
246 | for (unit = 0; unit < btuart_cd.cd_ndevs; unit++) |
247 | if (device_lookup(&btuart_cd, unit) == NULL) |
248 | break; |
249 | |
250 | cfdata->cf_name = btuart_cd.cd_name; |
251 | cfdata->cf_atname = btuart_cd.cd_name; |
252 | cfdata->cf_unit = unit; |
253 | cfdata->cf_fstate = FSTATE_STAR; |
254 | |
255 | dev = config_attach_pseudo(cfdata); |
256 | if (dev == NULL) { |
257 | free(cfdata, M_DEVBUF); |
258 | splx(s); |
259 | return EIO; |
260 | } |
261 | sc = device_private(dev); |
262 | |
263 | aprint_normal_dev(dev, "major %llu minor %llu\n" , |
264 | (unsigned long long)major(tp->t_dev), |
265 | (unsigned long long)minor(tp->t_dev)); |
266 | |
267 | sc->sc_tp = tp; |
268 | tp->t_sc = sc; |
269 | |
270 | mutex_spin_enter(&tty_lock); |
271 | ttyflush(tp, FREAD | FWRITE); |
272 | mutex_spin_exit(&tty_lock); |
273 | |
274 | splx(s); |
275 | |
276 | return 0; |
277 | } |
278 | |
279 | static int |
280 | btuartclose(struct tty *tp, int flag __unused) |
281 | { |
282 | struct btuart_softc *sc = tp->t_sc; |
283 | cfdata_t cfdata; |
284 | int s; |
285 | |
286 | s = spltty(); |
287 | |
288 | mutex_spin_enter(&tty_lock); |
289 | ttyflush(tp, FREAD | FWRITE); |
290 | mutex_spin_exit(&tty_lock); /* XXX */ |
291 | |
292 | ttyldisc_release(tp->t_linesw); |
293 | tp->t_linesw = ttyldisc_default(); |
294 | |
295 | if (sc != NULL) { |
296 | tp->t_sc = NULL; |
297 | if (sc->sc_tp == tp) { |
298 | cfdata = device_cfdata(sc->sc_dev); |
299 | config_detach(sc->sc_dev, 0); |
300 | free(cfdata, M_DEVBUF); |
301 | } |
302 | } |
303 | |
304 | splx(s); |
305 | |
306 | return 0; |
307 | } |
308 | |
309 | static int |
310 | btuartioctl(struct tty *tp, u_long cmd, void *data __unused, |
311 | int flag __unused, struct lwp *l __unused) |
312 | { |
313 | struct btuart_softc *sc = tp->t_sc; |
314 | int error; |
315 | |
316 | if (sc == NULL || tp != sc->sc_tp) |
317 | return EPASSTHROUGH; |
318 | |
319 | switch(cmd) { |
320 | default: |
321 | error = EPASSTHROUGH; |
322 | break; |
323 | } |
324 | |
325 | return error; |
326 | } |
327 | |
328 | static int |
329 | btuartinput(int c, struct tty *tp) |
330 | { |
331 | struct btuart_softc *sc = tp->t_sc; |
332 | struct mbuf *m = sc->sc_rxp; |
333 | int space = 0; |
334 | |
335 | if (!sc->sc_enabled) |
336 | return 0; |
337 | |
338 | c &= TTY_CHARMASK; |
339 | |
340 | /* If we already started a packet, find the trailing end of it. */ |
341 | if (m) { |
342 | while (m->m_next) |
343 | m = m->m_next; |
344 | |
345 | space = M_TRAILINGSPACE(m); |
346 | } |
347 | |
348 | if (space == 0) { |
349 | if (m == NULL) { |
350 | /* new packet */ |
351 | MGETHDR(m, M_DONTWAIT, MT_DATA); |
352 | if (m == NULL) { |
353 | aprint_error_dev(sc->sc_dev, "out of memory\n" ); |
354 | sc->sc_stats.err_rx++; |
355 | return 0; /* (lost sync) */ |
356 | } |
357 | |
358 | sc->sc_rxp = m; |
359 | m->m_pkthdr.len = m->m_len = 0; |
360 | space = MHLEN; |
361 | |
362 | sc->sc_state = BTUART_RECV_PKT_TYPE; |
363 | sc->sc_want = 1; |
364 | } else { |
365 | /* extend mbuf */ |
366 | MGET(m->m_next, M_DONTWAIT, MT_DATA); |
367 | if (m->m_next == NULL) { |
368 | aprint_error_dev(sc->sc_dev, "out of memory\n" ); |
369 | sc->sc_stats.err_rx++; |
370 | return 0; /* (lost sync) */ |
371 | } |
372 | |
373 | m = m->m_next; |
374 | m->m_len = 0; |
375 | space = MLEN; |
376 | |
377 | if (sc->sc_want > MINCLSIZE) { |
378 | MCLGET(m, M_DONTWAIT); |
379 | if (m->m_flags & M_EXT) |
380 | space = MCLBYTES; |
381 | } |
382 | } |
383 | } |
384 | |
385 | mtod(m, uint8_t *)[m->m_len++] = c; |
386 | sc->sc_rxp->m_pkthdr.len++; |
387 | sc->sc_stats.byte_rx++; |
388 | |
389 | sc->sc_want--; |
390 | if (sc->sc_want > 0) |
391 | return 0; /* want more */ |
392 | |
393 | switch (sc->sc_state) { |
394 | case BTUART_RECV_PKT_TYPE: /* Got packet type */ |
395 | |
396 | switch (c) { |
397 | case HCI_ACL_DATA_PKT: |
398 | sc->sc_state = BTUART_RECV_ACL_HDR; |
399 | sc->sc_want = sizeof(hci_acldata_hdr_t) - 1; |
400 | break; |
401 | |
402 | case HCI_SCO_DATA_PKT: |
403 | sc->sc_state = BTUART_RECV_SCO_HDR; |
404 | sc->sc_want = sizeof(hci_scodata_hdr_t) - 1; |
405 | break; |
406 | |
407 | case HCI_EVENT_PKT: |
408 | sc->sc_state = BTUART_RECV_EVENT_HDR; |
409 | sc->sc_want = sizeof(hci_event_hdr_t) - 1; |
410 | break; |
411 | |
412 | default: |
413 | aprint_error_dev(sc->sc_dev, |
414 | "Unknown packet type=%#x!\n" , c); |
415 | sc->sc_stats.err_rx++; |
416 | m_freem(sc->sc_rxp); |
417 | sc->sc_rxp = NULL; |
418 | return 0; /* (lost sync) */ |
419 | } |
420 | |
421 | break; |
422 | |
423 | /* |
424 | * we assume (correctly of course :) that the packet headers all fit |
425 | * into a single pkthdr mbuf |
426 | */ |
427 | case BTUART_RECV_ACL_HDR: /* Got ACL Header */ |
428 | sc->sc_state = BTUART_RECV_ACL_DATA; |
429 | sc->sc_want = mtod(m, hci_acldata_hdr_t *)->length; |
430 | sc->sc_want = le16toh(sc->sc_want); |
431 | break; |
432 | |
433 | case BTUART_RECV_SCO_HDR: /* Got SCO Header */ |
434 | sc->sc_state = BTUART_RECV_SCO_DATA; |
435 | sc->sc_want = mtod(m, hci_scodata_hdr_t *)->length; |
436 | break; |
437 | |
438 | case BTUART_RECV_EVENT_HDR: /* Got Event Header */ |
439 | sc->sc_state = BTUART_RECV_EVENT_DATA; |
440 | sc->sc_want = mtod(m, hci_event_hdr_t *)->length; |
441 | break; |
442 | |
443 | case BTUART_RECV_ACL_DATA: /* ACL Packet Complete */ |
444 | if (!hci_input_acl(sc->sc_unit, sc->sc_rxp)) |
445 | sc->sc_stats.err_rx++; |
446 | |
447 | sc->sc_stats.acl_rx++; |
448 | sc->sc_rxp = m = NULL; |
449 | break; |
450 | |
451 | case BTUART_RECV_SCO_DATA: /* SCO Packet Complete */ |
452 | if (!hci_input_sco(sc->sc_unit, sc->sc_rxp)) |
453 | sc->sc_stats.err_rx++; |
454 | |
455 | sc->sc_stats.sco_rx++; |
456 | sc->sc_rxp = m = NULL; |
457 | break; |
458 | |
459 | case BTUART_RECV_EVENT_DATA: /* Event Packet Complete */ |
460 | if (!hci_input_event(sc->sc_unit, sc->sc_rxp)) |
461 | sc->sc_stats.err_rx++; |
462 | |
463 | sc->sc_stats.evt_rx++; |
464 | sc->sc_rxp = m = NULL; |
465 | break; |
466 | |
467 | default: |
468 | panic("%s: invalid state %d!\n" , |
469 | device_xname(sc->sc_dev), sc->sc_state); |
470 | } |
471 | |
472 | return 0; |
473 | } |
474 | |
475 | static int |
476 | btuartstart(struct tty *tp) |
477 | { |
478 | struct btuart_softc *sc = tp->t_sc; |
479 | struct mbuf *m; |
480 | int count, rlen; |
481 | uint8_t *rptr; |
482 | |
483 | if (!sc->sc_enabled) |
484 | return 0; |
485 | |
486 | m = sc->sc_txp; |
487 | if (m == NULL) { |
488 | if (MBUFQ_FIRST(&sc->sc_cmdq)) { |
489 | MBUFQ_DEQUEUE(&sc->sc_cmdq, m); |
490 | sc->sc_stats.cmd_tx++; |
491 | } else if (MBUFQ_FIRST(&sc->sc_scoq)) { |
492 | MBUFQ_DEQUEUE(&sc->sc_scoq, m); |
493 | sc->sc_stats.sco_tx++; |
494 | } else if (MBUFQ_FIRST(&sc->sc_aclq)) { |
495 | MBUFQ_DEQUEUE(&sc->sc_aclq, m); |
496 | sc->sc_stats.acl_tx++; |
497 | } else { |
498 | sc->sc_xmit = false; |
499 | return 0; /* no more to send */ |
500 | } |
501 | |
502 | sc->sc_txp = m; |
503 | sc->sc_xmit = true; |
504 | } |
505 | |
506 | count = 0; |
507 | rlen = 0; |
508 | rptr = mtod(m, uint8_t *); |
509 | |
510 | for(;;) { |
511 | if (rlen >= m->m_len) { |
512 | m = m->m_next; |
513 | if (m == NULL) { |
514 | m = sc->sc_txp; |
515 | sc->sc_txp = NULL; |
516 | |
517 | if (M_GETCTX(m, void *) == NULL) |
518 | m_freem(m); |
519 | else if (!hci_complete_sco(sc->sc_unit, m)) |
520 | sc->sc_stats.err_tx++; |
521 | |
522 | break; |
523 | } |
524 | |
525 | rlen = 0; |
526 | rptr = mtod(m, uint8_t *); |
527 | continue; |
528 | } |
529 | |
530 | if (putc(*rptr++, &tp->t_outq) < 0) { |
531 | m_adj(m, rlen); |
532 | break; |
533 | } |
534 | rlen++; |
535 | count++; |
536 | } |
537 | |
538 | sc->sc_stats.byte_tx += count; |
539 | |
540 | if (tp->t_outq.c_cc != 0) |
541 | (*tp->t_oproc)(tp); |
542 | |
543 | return 0; |
544 | } |
545 | |
546 | /***************************************************************************** |
547 | * |
548 | * bluetooth(9) functions |
549 | */ |
550 | |
551 | static int |
552 | btuart_enable(device_t self) |
553 | { |
554 | struct btuart_softc *sc = device_private(self); |
555 | int s; |
556 | |
557 | if (sc->sc_enabled) |
558 | return 0; |
559 | |
560 | s = spltty(); |
561 | |
562 | sc->sc_enabled = true; |
563 | sc->sc_xmit = false; |
564 | |
565 | splx(s); |
566 | |
567 | return 0; |
568 | } |
569 | |
570 | static void |
571 | btuart_disable(device_t self) |
572 | { |
573 | struct btuart_softc *sc = device_private(self); |
574 | int s; |
575 | |
576 | if (!sc->sc_enabled) |
577 | return; |
578 | |
579 | s = spltty(); |
580 | |
581 | if (sc->sc_rxp) { |
582 | m_freem(sc->sc_rxp); |
583 | sc->sc_rxp = NULL; |
584 | } |
585 | |
586 | if (sc->sc_txp) { |
587 | m_freem(sc->sc_txp); |
588 | sc->sc_txp = NULL; |
589 | } |
590 | |
591 | MBUFQ_DRAIN(&sc->sc_cmdq); |
592 | MBUFQ_DRAIN(&sc->sc_aclq); |
593 | MBUFQ_DRAIN(&sc->sc_scoq); |
594 | |
595 | sc->sc_enabled = false; |
596 | |
597 | splx(s); |
598 | } |
599 | |
600 | static void |
601 | btuart_output_cmd(device_t self, struct mbuf *m) |
602 | { |
603 | struct btuart_softc *sc = device_private(self); |
604 | int s; |
605 | |
606 | KASSERT(sc->sc_enabled); |
607 | |
608 | M_SETCTX(m, NULL); |
609 | |
610 | s = spltty(); |
611 | MBUFQ_ENQUEUE(&sc->sc_cmdq, m); |
612 | if (!sc->sc_xmit) |
613 | btuartstart(sc->sc_tp); |
614 | |
615 | splx(s); |
616 | } |
617 | |
618 | static void |
619 | btuart_output_acl(device_t self, struct mbuf *m) |
620 | { |
621 | struct btuart_softc *sc = device_private(self); |
622 | int s; |
623 | |
624 | KASSERT(sc->sc_enabled); |
625 | |
626 | M_SETCTX(m, NULL); |
627 | |
628 | s = spltty(); |
629 | MBUFQ_ENQUEUE(&sc->sc_aclq, m); |
630 | if (!sc->sc_xmit) |
631 | btuartstart(sc->sc_tp); |
632 | |
633 | splx(s); |
634 | } |
635 | |
636 | static void |
637 | btuart_output_sco(device_t self, struct mbuf *m) |
638 | { |
639 | struct btuart_softc *sc = device_private(self); |
640 | int s; |
641 | |
642 | KASSERT(sc->sc_enabled); |
643 | |
644 | s = spltty(); |
645 | MBUFQ_ENQUEUE(&sc->sc_scoq, m); |
646 | if (!sc->sc_xmit) |
647 | btuartstart(sc->sc_tp); |
648 | |
649 | splx(s); |
650 | } |
651 | |
652 | static void |
653 | btuart_stats(device_t self, struct bt_stats *dest, int flush) |
654 | { |
655 | struct btuart_softc *sc = device_private(self); |
656 | int s; |
657 | |
658 | s = spltty(); |
659 | |
660 | memcpy(dest, &sc->sc_stats, sizeof(struct bt_stats)); |
661 | |
662 | if (flush) |
663 | memset(&sc->sc_stats, 0, sizeof(struct bt_stats)); |
664 | |
665 | splx(s); |
666 | } |
667 | |