1 /*-
2 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
3 * Portions Copyright (c) Ryan Beasley <ryan.beasley@gmail.com> - GSoC 2006
4 * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org>
5 * Copyright (c) 1997 Luigi Rizzo
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #ifdef HAVE_KERNEL_OPTION_HEADERS
31 #include "opt_snd.h"
32 #endif
33
34 #include <dev/sound/pcm/sound.h>
35 #include <dev/sound/pcm/ac97.h>
36 #include <dev/sound/pcm/vchan.h>
37 #include <dev/sound/pcm/dsp.h>
38 #include <dev/sound/pcm/sndstat.h>
39 #include <dev/sound/version.h>
40 #include <sys/limits.h>
41 #include <sys/sysctl.h>
42
43 #include "feeder_if.h"
44
45 SND_DECLARE_FILE("$FreeBSD: releng/9.1/sys/dev/sound/pcm/sound.c 231762 2012-02-15 14:30:04Z mav $");
46
47 devclass_t pcm_devclass;
48
49 int pcm_veto_load = 1;
50
51 int snd_unit = -1;
52 TUNABLE_INT("hw.snd.default_unit", &snd_unit);
53
54 static int snd_unit_auto = -1;
55 TUNABLE_INT("hw.snd.default_auto", &snd_unit_auto);
56 SYSCTL_INT(_hw_snd, OID_AUTO, default_auto, CTLFLAG_RW,
57 &snd_unit_auto, 0, "assign default unit to a newly attached device");
58
59 int snd_maxautovchans = 16;
60 /* XXX: a tunable implies that we may need more than one sound channel before
61 the system can change a sysctl (/etc/sysctl.conf), do we really need
62 this? */
63 TUNABLE_INT("hw.snd.maxautovchans", &snd_maxautovchans);
64
65 SYSCTL_NODE(_hw, OID_AUTO, snd, CTLFLAG_RD, 0, "Sound driver");
66
67 /*
68 * XXX I've had enough with people not telling proper version/arch
69 * while reporting problems, not after 387397913213th questions/requests.
70 */
71 static char snd_driver_version[] =
72 __XSTRING(SND_DRV_VERSION)"/"MACHINE_ARCH;
73 SYSCTL_STRING(_hw_snd, OID_AUTO, version, CTLFLAG_RD, &snd_driver_version,
74 0, "driver version/arch");
75
76 /**
77 * @brief Unit number allocator for syncgroup IDs
78 */
79 struct unrhdr *pcmsg_unrhdr = NULL;
80
81 static int
82 sndstat_prepare_pcm(SNDSTAT_PREPARE_PCM_ARGS)
83 {
84 SNDSTAT_PREPARE_PCM_BEGIN();
85 SNDSTAT_PREPARE_PCM_END();
86 }
87
88 void *
89 snd_mtxcreate(const char *desc, const char *type)
90 {
91 struct mtx *m;
92
93 m = malloc(sizeof(*m), M_DEVBUF, M_WAITOK | M_ZERO);
94 mtx_init(m, desc, type, MTX_DEF);
95 return m;
96 }
97
98 void
99 snd_mtxfree(void *m)
100 {
101 struct mtx *mtx = m;
102
103 mtx_destroy(mtx);
104 free(mtx, M_DEVBUF);
105 }
106
107 void
108 snd_mtxassert(void *m)
109 {
110 #ifdef INVARIANTS
111 struct mtx *mtx = m;
112
113 mtx_assert(mtx, MA_OWNED);
114 #endif
115 }
116
117 int
118 snd_setup_intr(device_t dev, struct resource *res, int flags, driver_intr_t hand, void *param, void **cookiep)
119 {
120 struct snddev_info *d;
121
122 flags &= INTR_MPSAFE;
123 flags |= INTR_TYPE_AV;
124 d = device_get_softc(dev);
125 if (d != NULL && (flags & INTR_MPSAFE))
126 d->flags |= SD_F_MPSAFE;
127
128 return bus_setup_intr(dev, res, flags,
129 #if __FreeBSD_version >= 700031
130 NULL,
131 #endif
132 hand, param, cookiep);
133 }
134
135 static void
136 pcm_clonereset(struct snddev_info *d)
137 {
138 int cmax;
139
140 PCM_BUSYASSERT(d);
141
142 cmax = d->playcount + d->reccount - 1;
143 if (d->pvchancount > 0)
144 cmax += max(d->pvchancount, snd_maxautovchans) - 1;
145 if (d->rvchancount > 0)
146 cmax += max(d->rvchancount, snd_maxautovchans) - 1;
147 if (cmax > PCMMAXCLONE)
148 cmax = PCMMAXCLONE;
149 (void)snd_clone_gc(d->clones);
150 (void)snd_clone_setmaxunit(d->clones, cmax);
151 }
152
153 int
154 pcm_setvchans(struct snddev_info *d, int direction, int newcnt, int num)
155 {
156 struct pcm_channel *c, *ch, *nch;
157 struct pcmchan_caps *caps;
158 int i, err, vcnt;
159
160 PCM_BUSYASSERT(d);
161
162 if ((direction == PCMDIR_PLAY && d->playcount < 1) ||
163 (direction == PCMDIR_REC && d->reccount < 1))
164 return (ENODEV);
165
166 if (!(d->flags & SD_F_AUTOVCHAN))
167 return (EINVAL);
168
169 if (newcnt < 0 || newcnt > SND_MAXVCHANS)
170 return (E2BIG);
171
172 if (direction == PCMDIR_PLAY)
173 vcnt = d->pvchancount;
174 else if (direction == PCMDIR_REC)
175 vcnt = d->rvchancount;
176 else
177 return (EINVAL);
178
179 if (newcnt > vcnt) {
180 KASSERT(num == -1 ||
181 (num >= 0 && num < SND_MAXVCHANS && (newcnt - 1) == vcnt),
182 ("bogus vchan_create() request num=%d newcnt=%d vcnt=%d",
183 num, newcnt, vcnt));
184 /* add new vchans - find a parent channel first */
185 ch = NULL;
186 CHN_FOREACH(c, d, channels.pcm) {
187 CHN_LOCK(c);
188 if (c->direction == direction &&
189 ((c->flags & CHN_F_HAS_VCHAN) || (vcnt == 0 &&
190 c->refcount < 1 &&
191 !(c->flags & (CHN_F_BUSY | CHN_F_VIRTUAL))))) {
192 /*
193 * Reuse hw channel with vchans already
194 * created.
195 */
196 if (c->flags & CHN_F_HAS_VCHAN) {
197 ch = c;
198 break;
199 }
200 /*
201 * No vchans ever created, look for
202 * channels with supported formats.
203 */
204 caps = chn_getcaps(c);
205 if (caps == NULL) {
206 CHN_UNLOCK(c);
207 continue;
208 }
209 for (i = 0; caps->fmtlist[i] != 0; i++) {
210 if (caps->fmtlist[i] & AFMT_CONVERTIBLE)
211 break;
212 }
213 if (caps->fmtlist[i] != 0) {
214 ch = c;
215 break;
216 }
217 }
218 CHN_UNLOCK(c);
219 }
220 if (ch == NULL)
221 return (EBUSY);
222 ch->flags |= CHN_F_BUSY;
223 err = 0;
224 while (err == 0 && newcnt > vcnt) {
225 err = vchan_create(ch, num);
226 if (err == 0)
227 vcnt++;
228 else if (err == E2BIG && newcnt > vcnt)
229 device_printf(d->dev,
230 "%s: err=%d Maximum channel reached.\n",
231 __func__, err);
232 }
233 if (vcnt == 0)
234 ch->flags &= ~CHN_F_BUSY;
235 CHN_UNLOCK(ch);
236 if (err != 0)
237 return (err);
238 else
239 pcm_clonereset(d);
240 } else if (newcnt < vcnt) {
241 KASSERT(num == -1,
242 ("bogus vchan_destroy() request num=%d", num));
243 CHN_FOREACH(c, d, channels.pcm) {
244 CHN_LOCK(c);
245 if (c->direction != direction ||
246 CHN_EMPTY(c, children) ||
247 !(c->flags & CHN_F_HAS_VCHAN)) {
248 CHN_UNLOCK(c);
249 continue;
250 }
251 CHN_FOREACH_SAFE(ch, c, nch, children) {
252 CHN_LOCK(ch);
253 if (vcnt == 1 && c->refcount > 0) {
254 CHN_UNLOCK(ch);
255 break;
256 }
257 if (!(ch->flags & CHN_F_BUSY) &&
258 ch->refcount < 1) {
259 err = vchan_destroy(ch);
260 if (err == 0)
261 vcnt--;
262 } else
263 CHN_UNLOCK(ch);
264 if (vcnt == newcnt)
265 break;
266 }
267 CHN_UNLOCK(c);
268 break;
269 }
270 pcm_clonereset(d);
271 }
272
273 return (0);
274 }
275
276 /* return error status and a locked channel */
277 int
278 pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction,
279 pid_t pid, char *comm, int devunit)
280 {
281 struct pcm_channel *c;
282 int err, vchancount, vchan_num;
283
284 KASSERT(d != NULL && ch != NULL && (devunit == -1 ||
285 !(devunit & ~(SND_U_MASK | SND_D_MASK | SND_C_MASK))) &&
286 (direction == PCMDIR_PLAY || direction == PCMDIR_REC),
287 ("%s(): invalid d=%p ch=%p direction=%d pid=%d devunit=%d",
288 __func__, d, ch, direction, pid, devunit));
289 PCM_BUSYASSERT(d);
290
291 /* Double check again. */
292 if (devunit != -1) {
293 switch (snd_unit2d(devunit)) {
294 case SND_DEV_DSPHW_PLAY:
295 case SND_DEV_DSPHW_VPLAY:
296 if (direction != PCMDIR_PLAY)
297 return (ENOTSUP);
298 break;
299 case SND_DEV_DSPHW_REC:
300 case SND_DEV_DSPHW_VREC:
301 if (direction != PCMDIR_REC)
302 return (ENOTSUP);
303 break;
304 default:
305 if (!(direction == PCMDIR_PLAY ||
306 direction == PCMDIR_REC))
307 return (ENOTSUP);
308 break;
309 }
310 }
311
312 *ch = NULL;
313 vchan_num = 0;
314 vchancount = (direction == PCMDIR_PLAY) ? d->pvchancount :
315 d->rvchancount;
316
317 retry_chnalloc:
318 err = ENOTSUP;
319 /* scan for a free channel */
320 CHN_FOREACH(c, d, channels.pcm) {
321 CHN_LOCK(c);
322 if (devunit == -1 && c->direction == direction &&
323 (c->flags & CHN_F_VIRTUAL)) {
324 if (vchancount < snd_maxautovchans &&
325 vchan_num < CHN_CHAN(c)) {
326 CHN_UNLOCK(c);
327 goto vchan_alloc;
328 }
329 vchan_num++;
330 }
331 if (c->direction == direction && !(c->flags & CHN_F_BUSY) &&
332 (devunit == -1 || devunit == -2 || c->unit == devunit)) {
333 c->flags |= CHN_F_BUSY;
334 c->pid = pid;
335 strlcpy(c->comm, (comm != NULL) ? comm :
336 CHN_COMM_UNKNOWN, sizeof(c->comm));
337 *ch = c;
338 return (0);
339 } else if (c->unit == devunit) {
340 if (c->direction != direction)
341 err = ENOTSUP;
342 else if (c->flags & CHN_F_BUSY)
343 err = EBUSY;
344 else
345 err = EINVAL;
346 CHN_UNLOCK(c);
347 return (err);
348 } else if ((devunit == -1 || devunit == -2) &&
349 c->direction == direction && (c->flags & CHN_F_BUSY))
350 err = EBUSY;
351 CHN_UNLOCK(c);
352 }
353
354 if (devunit == -2)
355 return (err);
356
357 vchan_alloc:
358 /* no channel available */
359 if (devunit == -1 || snd_unit2d(devunit) == SND_DEV_DSPHW_VPLAY ||
360 snd_unit2d(devunit) == SND_DEV_DSPHW_VREC) {
361 if (!(vchancount > 0 && vchancount < snd_maxautovchans) &&
362 (devunit == -1 || snd_unit2c(devunit) < snd_maxautovchans))
363 return (err);
364 err = pcm_setvchans(d, direction, vchancount + 1,
365 (devunit == -1) ? -1 : snd_unit2c(devunit));
366 if (err == 0) {
367 if (devunit == -1)
368 devunit = -2;
369 goto retry_chnalloc;
370 }
371 }
372
373 return (err);
374 }
375
376 /* release a locked channel and unlock it */
377 int
378 pcm_chnrelease(struct pcm_channel *c)
379 {
380 PCM_BUSYASSERT(c->parentsnddev);
381 CHN_LOCKASSERT(c);
382
383 c->flags &= ~CHN_F_BUSY;
384 c->pid = -1;
385 strlcpy(c->comm, CHN_COMM_UNUSED, sizeof(c->comm));
386 CHN_UNLOCK(c);
387
388 return (0);
389 }
390
391 int
392 pcm_chnref(struct pcm_channel *c, int ref)
393 {
394 PCM_BUSYASSERT(c->parentsnddev);
395 CHN_LOCKASSERT(c);
396
397 c->refcount += ref;
398
399 return (c->refcount);
400 }
401
402 int
403 pcm_inprog(struct snddev_info *d, int delta)
404 {
405 PCM_LOCKASSERT(d);
406
407 d->inprog += delta;
408
409 return (d->inprog);
410 }
411
412 static void
413 pcm_setmaxautovchans(struct snddev_info *d, int num)
414 {
415 PCM_BUSYASSERT(d);
416
417 if (num < 0)
418 return;
419
420 if (num >= 0 && d->pvchancount > num)
421 (void)pcm_setvchans(d, PCMDIR_PLAY, num, -1);
422 else if (num > 0 && d->pvchancount == 0)
423 (void)pcm_setvchans(d, PCMDIR_PLAY, 1, -1);
424
425 if (num >= 0 && d->rvchancount > num)
426 (void)pcm_setvchans(d, PCMDIR_REC, num, -1);
427 else if (num > 0 && d->rvchancount == 0)
428 (void)pcm_setvchans(d, PCMDIR_REC, 1, -1);
429
430 pcm_clonereset(d);
431 }
432
433 static int
434 sysctl_hw_snd_default_unit(SYSCTL_HANDLER_ARGS)
435 {
436 struct snddev_info *d;
437 int error, unit;
438
439 unit = snd_unit;
440 error = sysctl_handle_int(oidp, &unit, 0, req);
441 if (error == 0 && req->newptr != NULL) {
442 d = devclass_get_softc(pcm_devclass, unit);
443 if (!PCM_REGISTERED(d) || CHN_EMPTY(d, channels.pcm))
444 return EINVAL;
445 snd_unit = unit;
446 snd_unit_auto = 0;
447 }
448 return (error);
449 }
450 /* XXX: do we need a way to let the user change the default unit? */
451 SYSCTL_PROC(_hw_snd, OID_AUTO, default_unit, CTLTYPE_INT | CTLFLAG_RW,
452 0, sizeof(int), sysctl_hw_snd_default_unit, "I", "default sound device");
453
454 static int
455 sysctl_hw_snd_maxautovchans(SYSCTL_HANDLER_ARGS)
456 {
457 struct snddev_info *d;
458 int i, v, error;
459
460 v = snd_maxautovchans;
461 error = sysctl_handle_int(oidp, &v, 0, req);
462 if (error == 0 && req->newptr != NULL) {
463 if (v < 0)
464 v = 0;
465 if (v > SND_MAXVCHANS)
466 v = SND_MAXVCHANS;
467 snd_maxautovchans = v;
468 for (i = 0; pcm_devclass != NULL &&
469 i < devclass_get_maxunit(pcm_devclass); i++) {
470 d = devclass_get_softc(pcm_devclass, i);
471 if (!PCM_REGISTERED(d))
472 continue;
473 PCM_ACQUIRE_QUICK(d);
474 pcm_setmaxautovchans(d, v);
475 PCM_RELEASE_QUICK(d);
476 }
477 }
478 return (error);
479 }
480 SYSCTL_PROC(_hw_snd, OID_AUTO, maxautovchans, CTLTYPE_INT | CTLFLAG_RW,
481 0, sizeof(int), sysctl_hw_snd_maxautovchans, "I", "maximum virtual channel");
482
483 struct pcm_channel *
484 pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, int num, void *devinfo)
485 {
486 struct pcm_channel *ch;
487 int direction, err, rpnum, *pnum, max;
488 int udc, device, chan;
489 char *dirs, *devname, buf[CHN_NAMELEN];
490
491 PCM_BUSYASSERT(d);
492 PCM_LOCKASSERT(d);
493 KASSERT(num >= -1, ("invalid num=%d", num));
494
495
496 switch (dir) {
497 case PCMDIR_PLAY:
498 dirs = "play";
499 direction = PCMDIR_PLAY;
500 pnum = &d->playcount;
501 device = SND_DEV_DSPHW_PLAY;
502 max = SND_MAXHWCHAN;
503 break;
504 case PCMDIR_PLAY_VIRTUAL:
505 dirs = "virtual";
506 direction = PCMDIR_PLAY;
507 pnum = &d->pvchancount;
508 device = SND_DEV_DSPHW_VPLAY;
509 max = SND_MAXVCHANS;
510 break;
511 case PCMDIR_REC:
512 dirs = "record";
513 direction = PCMDIR_REC;
514 pnum = &d->reccount;
515 device = SND_DEV_DSPHW_REC;
516 max = SND_MAXHWCHAN;
517 break;
518 case PCMDIR_REC_VIRTUAL:
519 dirs = "virtual";
520 direction = PCMDIR_REC;
521 pnum = &d->rvchancount;
522 device = SND_DEV_DSPHW_VREC;
523 max = SND_MAXVCHANS;
524 break;
525 default:
526 return (NULL);
527 }
528
529 chan = (num == -1) ? 0 : num;
530
531 if (*pnum >= max || chan >= max)
532 return (NULL);
533
534 rpnum = 0;
535
536 CHN_FOREACH(ch, d, channels.pcm) {
537 if (CHN_DEV(ch) != device)
538 continue;
539 if (chan == CHN_CHAN(ch)) {
540 if (num != -1) {
541 device_printf(d->dev,
542 "channel num=%d allocated!\n", chan);
543 return (NULL);
544 }
545 chan++;
546 if (chan >= max) {
547 device_printf(d->dev,
548 "chan=%d > %d\n", chan, max);
549 return (NULL);
550 }
551 }
552 rpnum++;
553 }
554
555 if (*pnum != rpnum) {
556 device_printf(d->dev,
557 "%s(): WARNING: pnum screwed : dirs=%s pnum=%d rpnum=%d\n",
558 __func__, dirs, *pnum, rpnum);
559 return (NULL);
560 }
561
562 udc = snd_mkunit(device_get_unit(d->dev), device, chan);
563 devname = dsp_unit2name(buf, sizeof(buf), udc);
564
565 if (devname == NULL) {
566 device_printf(d->dev,
567 "Failed to query device name udc=0x%08x\n", udc);
568 return (NULL);
569 }
570
571 PCM_UNLOCK(d);
572 ch = malloc(sizeof(*ch), M_DEVBUF, M_WAITOK | M_ZERO);
573 ch->methods = kobj_create(cls, M_DEVBUF, M_WAITOK | M_ZERO);
574 ch->unit = udc;
575 ch->pid = -1;
576 strlcpy(ch->comm, CHN_COMM_UNUSED, sizeof(ch->comm));
577 ch->parentsnddev = d;
578 ch->parentchannel = parent;
579 ch->dev = d->dev;
580 ch->trigger = PCMTRIG_STOP;
581 snprintf(ch->name, sizeof(ch->name), "%s:%s:%s",
582 device_get_nameunit(ch->dev), dirs, devname);
583
584 err = chn_init(ch, devinfo, dir, direction);
585 PCM_LOCK(d);
586 if (err) {
587 device_printf(d->dev, "chn_init(%s) failed: err = %d\n",
588 ch->name, err);
589 kobj_delete(ch->methods, M_DEVBUF);
590 free(ch, M_DEVBUF);
591 return (NULL);
592 }
593
594 return (ch);
595 }
596
597 int
598 pcm_chn_destroy(struct pcm_channel *ch)
599 {
600 struct snddev_info *d;
601 int err;
602
603 d = ch->parentsnddev;
604 PCM_BUSYASSERT(d);
605
606 err = chn_kill(ch);
607 if (err) {
608 device_printf(ch->dev, "chn_kill(%s) failed, err = %d\n",
609 ch->name, err);
610 return (err);
611 }
612
613 kobj_delete(ch->methods, M_DEVBUF);
614 free(ch, M_DEVBUF);
615
616 return (0);
617 }
618
619 int
620 pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch)
621 {
622 PCM_BUSYASSERT(d);
623 PCM_LOCKASSERT(d);
624 KASSERT(ch != NULL && (ch->direction == PCMDIR_PLAY ||
625 ch->direction == PCMDIR_REC), ("Invalid pcm channel"));
626
627 CHN_INSERT_SORT_ASCEND(d, ch, channels.pcm);
628
629 switch (CHN_DEV(ch)) {
630 case SND_DEV_DSPHW_PLAY:
631 d->playcount++;
632 break;
633 case SND_DEV_DSPHW_VPLAY:
634 d->pvchancount++;
635 break;
636 case SND_DEV_DSPHW_REC:
637 d->reccount++;
638 break;
639 case SND_DEV_DSPHW_VREC:
640 d->rvchancount++;
641 break;
642 default:
643 break;
644 }
645
646 d->devcount++;
647
648 return (0);
649 }
650
651 int
652 pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch)
653 {
654 struct pcm_channel *tmp;
655
656 PCM_BUSYASSERT(d);
657 PCM_LOCKASSERT(d);
658
659 tmp = NULL;
660
661 CHN_FOREACH(tmp, d, channels.pcm) {
662 if (tmp == ch)
663 break;
664 }
665
666 if (tmp != ch)
667 return (EINVAL);
668
669 CHN_REMOVE(d, ch, channels.pcm);
670
671 switch (CHN_DEV(ch)) {
672 case SND_DEV_DSPHW_PLAY:
673 d->playcount--;
674 break;
675 case SND_DEV_DSPHW_VPLAY:
676 d->pvchancount--;
677 break;
678 case SND_DEV_DSPHW_REC:
679 d->reccount--;
680 break;
681 case SND_DEV_DSPHW_VREC:
682 d->rvchancount--;
683 break;
684 default:
685 break;
686 }
687
688 d->devcount--;
689
690 return (0);
691 }
692
693 int
694 pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo)
695 {
696 struct snddev_info *d = device_get_softc(dev);
697 struct pcm_channel *ch;
698 int err;
699
700 PCM_BUSYASSERT(d);
701
702 PCM_LOCK(d);
703 ch = pcm_chn_create(d, NULL, cls, dir, -1, devinfo);
704 if (!ch) {
705 device_printf(d->dev, "pcm_chn_create(%s, %d, %p) failed\n",
706 cls->name, dir, devinfo);
707 PCM_UNLOCK(d);
708 return (ENODEV);
709 }
710
711 err = pcm_chn_add(d, ch);
712 PCM_UNLOCK(d);
713 if (err) {
714 device_printf(d->dev, "pcm_chn_add(%s) failed, err=%d\n",
715 ch->name, err);
716 pcm_chn_destroy(ch);
717 }
718
719 return (err);
720 }
721
722 static int
723 pcm_killchan(device_t dev)
724 {
725 struct snddev_info *d = device_get_softc(dev);
726 struct pcm_channel *ch;
727 int error;
728
729 PCM_BUSYASSERT(d);
730
731 ch = CHN_FIRST(d, channels.pcm);
732
733 PCM_LOCK(d);
734 error = pcm_chn_remove(d, ch);
735 PCM_UNLOCK(d);
736 if (error)
737 return (error);
738 return (pcm_chn_destroy(ch));
739 }
740
741 static int
742 pcm_best_unit(int old)
743 {
744 struct snddev_info *d;
745 int i, best, bestprio, prio;
746
747 best = -1;
748 bestprio = -100;
749 for (i = 0; pcm_devclass != NULL &&
750 i < devclass_get_maxunit(pcm_devclass); i++) {
751 d = devclass_get_softc(pcm_devclass, i);
752 if (!PCM_REGISTERED(d))
753 continue;
754 prio = 0;
755 if (d->playcount == 0)
756 prio -= 10;
757 if (d->reccount == 0)
758 prio -= 2;
759 if (prio > bestprio || (prio == bestprio && i == old)) {
760 best = i;
761 bestprio = prio;
762 }
763 }
764 return (best);
765 }
766
767 int
768 pcm_setstatus(device_t dev, char *str)
769 {
770 struct snddev_info *d = device_get_softc(dev);
771
772 PCM_BUSYASSERT(d);
773
774 if (d->playcount == 0 || d->reccount == 0)
775 d->flags |= SD_F_SIMPLEX;
776
777 if ((d->playcount > 0 || d->reccount > 0) &&
778 !(d->flags & SD_F_AUTOVCHAN)) {
779 d->flags |= SD_F_AUTOVCHAN;
780 vchan_initsys(dev);
781 }
782
783 pcm_setmaxautovchans(d, snd_maxautovchans);
784
785 strlcpy(d->status, str, SND_STATUSLEN);
786
787 PCM_LOCK(d);
788
789 /* Last stage, enable cloning. */
790 if (d->clones != NULL)
791 (void)snd_clone_enable(d->clones);
792
793 /* Done, we're ready.. */
794 d->flags |= SD_F_REGISTERED;
795
796 PCM_RELEASE(d);
797
798 PCM_UNLOCK(d);
799
800 if (snd_unit_auto < 0)
801 snd_unit_auto = (snd_unit < 0) ? 1 : 0;
802 if (snd_unit < 0 || snd_unit_auto > 1)
803 snd_unit = device_get_unit(dev);
804 else if (snd_unit_auto == 1)
805 snd_unit = pcm_best_unit(snd_unit);
806
807 return (0);
808 }
809
810 uint32_t
811 pcm_getflags(device_t dev)
812 {
813 struct snddev_info *d = device_get_softc(dev);
814
815 return d->flags;
816 }
817
818 void
819 pcm_setflags(device_t dev, uint32_t val)
820 {
821 struct snddev_info *d = device_get_softc(dev);
822
823 d->flags = val;
824 }
825
826 void *
827 pcm_getdevinfo(device_t dev)
828 {
829 struct snddev_info *d = device_get_softc(dev);
830
831 return d->devinfo;
832 }
833
834 unsigned int
835 pcm_getbuffersize(device_t dev, unsigned int minbufsz, unsigned int deflt, unsigned int maxbufsz)
836 {
837 struct snddev_info *d = device_get_softc(dev);
838 int sz, x;
839
840 sz = 0;
841 if (resource_int_value(device_get_name(dev), device_get_unit(dev), "buffersize", &sz) == 0) {
842 x = sz;
843 RANGE(sz, minbufsz, maxbufsz);
844 if (x != sz)
845 device_printf(dev, "'buffersize=%d' hint is out of range (%d-%d), using %d\n", x, minbufsz, maxbufsz, sz);
846 x = minbufsz;
847 while (x < sz)
848 x <<= 1;
849 if (x > sz)
850 x >>= 1;
851 if (x != sz) {
852 device_printf(dev, "'buffersize=%d' hint is not a power of 2, using %d\n", sz, x);
853 sz = x;
854 }
855 } else {
856 sz = deflt;
857 }
858
859 d->bufsz = sz;
860
861 return sz;
862 }
863
864 static int
865 sysctl_dev_pcm_bitperfect(SYSCTL_HANDLER_ARGS)
866 {
867 struct snddev_info *d;
868 int err, val;
869
870 d = oidp->oid_arg1;
871 if (!PCM_REGISTERED(d))
872 return (ENODEV);
873
874 PCM_LOCK(d);
875 PCM_WAIT(d);
876 val = (d->flags & SD_F_BITPERFECT) ? 1 : 0;
877 PCM_ACQUIRE(d);
878 PCM_UNLOCK(d);
879
880 err = sysctl_handle_int(oidp, &val, 0, req);
881
882 if (err == 0 && req->newptr != NULL) {
883 if (!(val == 0 || val == 1)) {
884 PCM_RELEASE_QUICK(d);
885 return (EINVAL);
886 }
887
888 PCM_LOCK(d);
889
890 d->flags &= ~SD_F_BITPERFECT;
891 d->flags |= (val != 0) ? SD_F_BITPERFECT : 0;
892
893 PCM_RELEASE(d);
894 PCM_UNLOCK(d);
895 } else
896 PCM_RELEASE_QUICK(d);
897
898 return (err);
899 }
900
901 #ifdef SND_DEBUG
902 static int
903 sysctl_dev_pcm_clone_flags(SYSCTL_HANDLER_ARGS)
904 {
905 struct snddev_info *d;
906 uint32_t flags;
907 int err;
908
909 d = oidp->oid_arg1;
910 if (!PCM_REGISTERED(d) || d->clones == NULL)
911 return (ENODEV);
912
913 PCM_ACQUIRE_QUICK(d);
914
915 flags = snd_clone_getflags(d->clones);
916 err = sysctl_handle_int(oidp, &flags, 0, req);
917
918 if (err == 0 && req->newptr != NULL) {
919 if (flags & ~SND_CLONE_MASK)
920 err = EINVAL;
921 else
922 (void)snd_clone_setflags(d->clones, flags);
923 }
924
925 PCM_RELEASE_QUICK(d);
926
927 return (err);
928 }
929
930 static int
931 sysctl_dev_pcm_clone_deadline(SYSCTL_HANDLER_ARGS)
932 {
933 struct snddev_info *d;
934 int err, deadline;
935
936 d = oidp->oid_arg1;
937 if (!PCM_REGISTERED(d) || d->clones == NULL)
938 return (ENODEV);
939
940 PCM_ACQUIRE_QUICK(d);
941
942 deadline = snd_clone_getdeadline(d->clones);
943 err = sysctl_handle_int(oidp, &deadline, 0, req);
944
945 if (err == 0 && req->newptr != NULL) {
946 if (deadline < 0)
947 err = EINVAL;
948 else
949 (void)snd_clone_setdeadline(d->clones, deadline);
950 }
951
952 PCM_RELEASE_QUICK(d);
953
954 return (err);
955 }
956
957 static int
958 sysctl_dev_pcm_clone_gc(SYSCTL_HANDLER_ARGS)
959 {
960 struct snddev_info *d;
961 int err, val;
962
963 d = oidp->oid_arg1;
964 if (!PCM_REGISTERED(d) || d->clones == NULL)
965 return (ENODEV);
966
967 val = 0;
968 err = sysctl_handle_int(oidp, &val, 0, req);
969
970 if (err == 0 && req->newptr != NULL && val != 0) {
971 PCM_ACQUIRE_QUICK(d);
972 val = snd_clone_gc(d->clones);
973 PCM_RELEASE_QUICK(d);
974 if (bootverbose != 0 || snd_verbose > 3)
975 device_printf(d->dev, "clone gc: pruned=%d\n", val);
976 }
977
978 return (err);
979 }
980
981 static int
982 sysctl_hw_snd_clone_gc(SYSCTL_HANDLER_ARGS)
983 {
984 struct snddev_info *d;
985 int i, err, val;
986
987 val = 0;
988 err = sysctl_handle_int(oidp, &val, 0, req);
989
990 if (err == 0 && req->newptr != NULL && val != 0) {
991 for (i = 0; pcm_devclass != NULL &&
992 i < devclass_get_maxunit(pcm_devclass); i++) {
993 d = devclass_get_softc(pcm_devclass, i);
994 if (!PCM_REGISTERED(d) || d->clones == NULL)
995 continue;
996 PCM_ACQUIRE_QUICK(d);
997 val = snd_clone_gc(d->clones);
998 PCM_RELEASE_QUICK(d);
999 if (bootverbose != 0 || snd_verbose > 3)
1000 device_printf(d->dev, "clone gc: pruned=%d\n",
1001 val);
1002 }
1003 }
1004
1005 return (err);
1006 }
1007 SYSCTL_PROC(_hw_snd, OID_AUTO, clone_gc, CTLTYPE_INT | CTLFLAG_RW,
1008 0, sizeof(int), sysctl_hw_snd_clone_gc, "I",
1009 "global clone garbage collector");
1010 #endif
1011
1012 int
1013 pcm_register(device_t dev, void *devinfo, int numplay, int numrec)
1014 {
1015 struct snddev_info *d;
1016 int i;
1017
1018 if (pcm_veto_load) {
1019 device_printf(dev, "disabled due to an error while initialising: %d\n", pcm_veto_load);
1020
1021 return EINVAL;
1022 }
1023
1024 if (device_get_unit(dev) > PCMMAXUNIT) {
1025 device_printf(dev, "PCMMAXUNIT reached : unit=%d > %d\n",
1026 device_get_unit(dev), PCMMAXUNIT);
1027 device_printf(dev,
1028 "Use 'hw.snd.maxunit' tunable to raise the limit.\n");
1029 return ENODEV;
1030 }
1031
1032 d = device_get_softc(dev);
1033 d->dev = dev;
1034 d->lock = snd_mtxcreate(device_get_nameunit(dev), "sound cdev");
1035 cv_init(&d->cv, device_get_nameunit(dev));
1036 PCM_ACQUIRE_QUICK(d);
1037 dsp_cdevinfo_init(d);
1038 #if 0
1039 /*
1040 * d->flags should be cleared by the allocator of the softc.
1041 * We cannot clear this field here because several devices set
1042 * this flag before calling pcm_register().
1043 */
1044 d->flags = 0;
1045 #endif
1046 i = 0;
1047 if (resource_int_value(device_get_name(dev), device_get_unit(dev),
1048 "vpc", &i) != 0 || i != 0)
1049 d->flags |= SD_F_VPC;
1050
1051 if (resource_int_value(device_get_name(dev), device_get_unit(dev),
1052 "bitperfect", &i) == 0 && i != 0)
1053 d->flags |= SD_F_BITPERFECT;
1054
1055 d->devinfo = devinfo;
1056 d->devcount = 0;
1057 d->reccount = 0;
1058 d->playcount = 0;
1059 d->pvchancount = 0;
1060 d->rvchancount = 0;
1061 d->pvchanrate = 0;
1062 d->pvchanformat = 0;
1063 d->rvchanrate = 0;
1064 d->rvchanformat = 0;
1065 d->inprog = 0;
1066
1067 /*
1068 * Create clone manager, disabled by default. Cloning will be
1069 * enabled during final stage of driver initialization through
1070 * pcm_setstatus().
1071 */
1072 d->clones = snd_clone_create(SND_U_MASK | SND_D_MASK, PCMMAXCLONE,
1073 SND_CLONE_DEADLINE_DEFAULT, SND_CLONE_WAITOK |
1074 SND_CLONE_GC_ENABLE | SND_CLONE_GC_UNREF |
1075 SND_CLONE_GC_LASTREF | SND_CLONE_GC_EXPIRED);
1076
1077 if (bootverbose != 0 || snd_verbose > 3) {
1078 device_printf(dev,
1079 "clone manager: deadline=%dms flags=0x%08x\n",
1080 snd_clone_getdeadline(d->clones),
1081 snd_clone_getflags(d->clones));
1082 }
1083
1084 CHN_INIT(d, channels.pcm);
1085 CHN_INIT(d, channels.pcm.busy);
1086 CHN_INIT(d, channels.pcm.opened);
1087
1088 /* XXX This is incorrect, but lets play along for now. */
1089 if ((numplay == 0 || numrec == 0) && numplay != numrec)
1090 d->flags |= SD_F_SIMPLEX;
1091
1092 sysctl_ctx_init(&d->play_sysctl_ctx);
1093 d->play_sysctl_tree = SYSCTL_ADD_NODE(&d->play_sysctl_ctx,
1094 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "play",
1095 CTLFLAG_RD, 0, "playback channels node");
1096 sysctl_ctx_init(&d->rec_sysctl_ctx);
1097 d->rec_sysctl_tree = SYSCTL_ADD_NODE(&d->rec_sysctl_ctx,
1098 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "rec",
1099 CTLFLAG_RD, 0, "record channels node");
1100 /* XXX: an user should be able to set this with a control tool, the
1101 sysadmin then needs min+max sysctls for this */
1102 SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev),
1103 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
1104 OID_AUTO, "buffersize", CTLFLAG_RD, &d->bufsz, 0, "allocated buffer size");
1105 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
1106 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
1107 "bitperfect", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d),
1108 sysctl_dev_pcm_bitperfect, "I",
1109 "bit-perfect playback/recording (0=disable, 1=enable)");
1110 #ifdef SND_DEBUG
1111 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
1112 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
1113 "clone_flags", CTLTYPE_UINT | CTLFLAG_RW, d, sizeof(d),
1114 sysctl_dev_pcm_clone_flags, "IU",
1115 "clone flags");
1116 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
1117 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
1118 "clone_deadline", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d),
1119 sysctl_dev_pcm_clone_deadline, "I",
1120 "clone expiration deadline (ms)");
1121 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
1122 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
1123 "clone_gc", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d),
1124 sysctl_dev_pcm_clone_gc, "I",
1125 "clone garbage collector");
1126 #endif
1127
1128 if (numplay > 0 || numrec > 0) {
1129 d->flags |= SD_F_AUTOVCHAN;
1130 vchan_initsys(dev);
1131 }
1132
1133 if (d->flags & SD_F_EQ)
1134 feeder_eq_initsys(dev);
1135
1136 sndstat_register(dev, d->status, sndstat_prepare_pcm);
1137
1138 return 0;
1139 }
1140
1141 int
1142 pcm_unregister(device_t dev)
1143 {
1144 struct snddev_info *d;
1145 struct pcm_channel *ch;
1146 struct thread *td;
1147
1148 td = curthread;
1149 d = device_get_softc(dev);
1150
1151 if (!PCM_ALIVE(d)) {
1152 device_printf(dev, "unregister: device not configured\n");
1153 return (0);
1154 }
1155
1156 if (sndstat_acquire(td) != 0) {
1157 device_printf(dev, "unregister: sndstat busy\n");
1158 return (EBUSY);
1159 }
1160
1161 PCM_LOCK(d);
1162 PCM_WAIT(d);
1163
1164 if (d->inprog != 0) {
1165 device_printf(dev, "unregister: operation in progress\n");
1166 PCM_UNLOCK(d);
1167 sndstat_release(td);
1168 return (EBUSY);
1169 }
1170
1171 PCM_ACQUIRE(d);
1172 PCM_UNLOCK(d);
1173
1174 CHN_FOREACH(ch, d, channels.pcm) {
1175 CHN_LOCK(ch);
1176 if (ch->refcount > 0) {
1177 device_printf(dev,
1178 "unregister: channel %s busy (pid %d)\n",
1179 ch->name, ch->pid);
1180 CHN_UNLOCK(ch);
1181 PCM_RELEASE_QUICK(d);
1182 sndstat_release(td);
1183 return (EBUSY);
1184 }
1185 CHN_UNLOCK(ch);
1186 }
1187
1188 if (d->clones != NULL) {
1189 if (snd_clone_busy(d->clones) != 0) {
1190 device_printf(dev, "unregister: clone busy\n");
1191 PCM_RELEASE_QUICK(d);
1192 sndstat_release(td);
1193 return (EBUSY);
1194 } else {
1195 PCM_LOCK(d);
1196 (void)snd_clone_disable(d->clones);
1197 PCM_UNLOCK(d);
1198 }
1199 }
1200
1201 if (mixer_uninit(dev) == EBUSY) {
1202 device_printf(dev, "unregister: mixer busy\n");
1203 PCM_LOCK(d);
1204 if (d->clones != NULL)
1205 (void)snd_clone_enable(d->clones);
1206 PCM_RELEASE(d);
1207 PCM_UNLOCK(d);
1208 sndstat_release(td);
1209 return (EBUSY);
1210 }
1211
1212 PCM_LOCK(d);
1213 d->flags |= SD_F_DYING;
1214 d->flags &= ~SD_F_REGISTERED;
1215 PCM_UNLOCK(d);
1216
1217 /*
1218 * No lock being held, so this thing can be flushed without
1219 * stucking into devdrn oblivion.
1220 */
1221 if (d->clones != NULL) {
1222 snd_clone_destroy(d->clones);
1223 d->clones = NULL;
1224 }
1225
1226 if (d->play_sysctl_tree != NULL) {
1227 sysctl_ctx_free(&d->play_sysctl_ctx);
1228 d->play_sysctl_tree = NULL;
1229 }
1230 if (d->rec_sysctl_tree != NULL) {
1231 sysctl_ctx_free(&d->rec_sysctl_ctx);
1232 d->rec_sysctl_tree = NULL;
1233 }
1234
1235 while (!CHN_EMPTY(d, channels.pcm))
1236 pcm_killchan(dev);
1237
1238 dsp_cdevinfo_flush(d);
1239
1240 PCM_LOCK(d);
1241 PCM_RELEASE(d);
1242 cv_destroy(&d->cv);
1243 PCM_UNLOCK(d);
1244 snd_mtxfree(d->lock);
1245 sndstat_unregister(dev);
1246 sndstat_release(td);
1247
1248 if (snd_unit == device_get_unit(dev)) {
1249 snd_unit = pcm_best_unit(-1);
1250 if (snd_unit_auto == 0)
1251 snd_unit_auto = 1;
1252 }
1253
1254 return (0);
1255 }
1256
1257 /************************************************************************/
1258
1259 /**
1260 * @brief Handle OSSv4 SNDCTL_SYSINFO ioctl.
1261 *
1262 * @param si Pointer to oss_sysinfo struct where information about the
1263 * sound subsystem will be written/copied.
1264 *
1265 * This routine returns information about the sound system, such as the
1266 * current OSS version, number of audio, MIDI, and mixer drivers, etc.
1267 * Also includes a bitmask showing which of the above types of devices
1268 * are open (busy).
1269 *
1270 * @note
1271 * Calling threads must not hold any snddev_info or pcm_channel locks.
1272 *
1273 * @author Ryan Beasley <ryanb@FreeBSD.org>
1274 */
1275 void
1276 sound_oss_sysinfo(oss_sysinfo *si)
1277 {
1278 static char si_product[] = "FreeBSD native OSS ABI";
1279 static char si_version[] = __XSTRING(__FreeBSD_version);
1280 static char si_license[] = "BSD";
1281 static int intnbits = sizeof(int) * 8; /* Better suited as macro?
1282 Must pester a C guru. */
1283
1284 struct snddev_info *d;
1285 struct pcm_channel *c;
1286 int i, j, ncards;
1287
1288 ncards = 0;
1289
1290 strlcpy(si->product, si_product, sizeof(si->product));
1291 strlcpy(si->version, si_version, sizeof(si->version));
1292 si->versionnum = SOUND_VERSION;
1293 strlcpy(si->license, si_license, sizeof(si->license));
1294
1295 /*
1296 * Iterate over PCM devices and their channels, gathering up data
1297 * for the numaudios, ncards, and openedaudio fields.
1298 */
1299 si->numaudios = 0;
1300 bzero((void *)&si->openedaudio, sizeof(si->openedaudio));
1301
1302 j = 0;
1303
1304 for (i = 0; pcm_devclass != NULL &&
1305 i < devclass_get_maxunit(pcm_devclass); i++) {
1306 d = devclass_get_softc(pcm_devclass, i);
1307 if (!PCM_REGISTERED(d))
1308 continue;
1309
1310 /* XXX Need Giant magic entry ??? */
1311
1312 /* See note in function's docblock */
1313 PCM_UNLOCKASSERT(d);
1314 PCM_LOCK(d);
1315
1316 si->numaudios += d->devcount;
1317 ++ncards;
1318
1319 CHN_FOREACH(c, d, channels.pcm) {
1320 CHN_UNLOCKASSERT(c);
1321 CHN_LOCK(c);
1322 if (c->flags & CHN_F_BUSY)
1323 si->openedaudio[j / intnbits] |=
1324 (1 << (j % intnbits));
1325 CHN_UNLOCK(c);
1326 j++;
1327 }
1328
1329 PCM_UNLOCK(d);
1330 }
1331 si->numaudioengines = si->numaudios;
1332
1333 si->numsynths = 0; /* OSSv4 docs: this field is obsolete */
1334 /**
1335 * @todo Collect num{midis,timers}.
1336 *
1337 * Need access to sound/midi/midi.c::midistat_lock in order
1338 * to safely touch midi_devices and get a head count of, well,
1339 * MIDI devices. midistat_lock is a global static (i.e., local to
1340 * midi.c), but midi_devices is a regular global; should the mutex
1341 * be publicized, or is there another way to get this information?
1342 *
1343 * NB: MIDI/sequencer stuff is currently on hold.
1344 */
1345 si->nummidis = 0;
1346 si->numtimers = 0;
1347 si->nummixers = mixer_count;
1348 si->numcards = ncards;
1349 /* OSSv4 docs: Intended only for test apps; API doesn't
1350 really have much of a concept of cards. Shouldn't be
1351 used by applications. */
1352
1353 /**
1354 * @todo Fill in "busy devices" fields.
1355 *
1356 * si->openedmidi = " MIDI devices
1357 */
1358 bzero((void *)&si->openedmidi, sizeof(si->openedmidi));
1359
1360 /*
1361 * Si->filler is a reserved array, but according to docs each
1362 * element should be set to -1.
1363 */
1364 for (i = 0; i < sizeof(si->filler)/sizeof(si->filler[0]); i++)
1365 si->filler[i] = -1;
1366 }
1367
1368 int
1369 sound_oss_card_info(oss_card_info *si)
1370 {
1371 struct snddev_info *d;
1372 int i, ncards;
1373
1374 ncards = 0;
1375
1376 for (i = 0; pcm_devclass != NULL &&
1377 i < devclass_get_maxunit(pcm_devclass); i++) {
1378 d = devclass_get_softc(pcm_devclass, i);
1379 if (!PCM_REGISTERED(d))
1380 continue;
1381
1382 if (ncards++ != si->card)
1383 continue;
1384
1385 PCM_UNLOCKASSERT(d);
1386 PCM_LOCK(d);
1387
1388 strlcpy(si->shortname, device_get_nameunit(d->dev),
1389 sizeof(si->shortname));
1390 strlcpy(si->longname, device_get_desc(d->dev),
1391 sizeof(si->longname));
1392 strlcpy(si->hw_info, d->status, sizeof(si->hw_info));
1393 si->intr_count = si->ack_count = 0;
1394
1395 PCM_UNLOCK(d);
1396
1397 return (0);
1398 }
1399 return (ENXIO);
1400 }
1401
1402 /************************************************************************/
1403
1404 static int
1405 sound_modevent(module_t mod, int type, void *data)
1406 {
1407 int ret;
1408 #if 0
1409 return (midi_modevent(mod, type, data));
1410 #else
1411 ret = 0;
1412
1413 switch(type) {
1414 case MOD_LOAD:
1415 pcmsg_unrhdr = new_unrhdr(1, INT_MAX, NULL);
1416 break;
1417 case MOD_UNLOAD:
1418 ret = sndstat_acquire(curthread);
1419 if (ret != 0)
1420 break;
1421 if (pcmsg_unrhdr != NULL) {
1422 delete_unrhdr(pcmsg_unrhdr);
1423 pcmsg_unrhdr = NULL;
1424 }
1425 break;
1426 case MOD_SHUTDOWN:
1427 break;
1428 default:
1429 ret = ENOTSUP;
1430 }
1431
1432 return ret;
1433 #endif
1434 }
1435
1436 DEV_MODULE(sound, sound_modevent, NULL);
1437 MODULE_VERSION(sound, SOUND_MODVER);
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