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sound - Fix default & unit specs for /dev/dsp and /dev/mixer
[dragonfly.git] / sys / dev / sound / pcm / sound.c
blob25d65f12f9da0cb41d0cede4c0987cbbf9a06e8f
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/devfs.h>
41 #include <sys/limits.h>
42 #include <sys/sysctl.h>
43
44 #include "feeder_if.h"
45
46 SND_DECLARE_FILE("$FreeBSD: head/sys/dev/sound/pcm/sound.c 274035 2014-11-03 11:11:45Z bapt $");
47
48 devclass_t pcm_devclass;
49
50 int pcm_veto_load = 1;
51 struct cdev *default_dsp;
52 struct cdev *default_mixer;
53
54 int snd_unit = -1;
55 TUNABLE_INT("hw.snd.default_unit", &snd_unit);
56
57 static int snd_unit_auto = -1;
58 TUNABLE_INT("hw.snd.default_auto", &snd_unit_auto);
59 SYSCTL_INT(_hw_snd, OID_AUTO, default_auto, CTLFLAG_RW,
60 &snd_unit_auto, 0, "assign default unit to a newly attached device");
61
62 int snd_maxautovchans = 16;
63 /* XXX: a tunable implies that we may need more than one sound channel before
64 the system can change a sysctl (/etc/sysctl.conf), do we really need
65 this? */
66 TUNABLE_INT("hw.snd.maxautovchans", &snd_maxautovchans);
67
68 SYSCTL_NODE(_hw, OID_AUTO, snd, CTLFLAG_RD, 0, "Sound driver");
69
70 /*
71 * XXX I've had enough with people not telling proper version/arch
72 * while reporting problems, not after 387397913213th questions/requests.
73 */
74 static char snd_driver_version[] =
75 __XSTRING(SND_DRV_VERSION)"/"MACHINE_ARCH;
76 SYSCTL_STRING(_hw_snd, OID_AUTO, version, CTLFLAG_RD, &snd_driver_version,
77 0, "driver version/arch");
78
79 /**
80 * @brief Unit number allocator for syncgroup IDs
81 */
82 struct unrhdr *pcmsg_unrhdr = NULL;
83
84 static int
85 sndstat_prepare_pcm(SNDSTAT_PREPARE_PCM_ARGS)
86 {
87 SNDSTAT_PREPARE_PCM_BEGIN();
88 SNDSTAT_PREPARE_PCM_END();
89 }
90
91 void *
92 snd_mtxcreate(const char *desc, const char *type)
93 {
94 struct lock *m;
95
96 m = kmalloc(sizeof(*m), M_DEVBUF, M_WAITOK | M_ZERO);
97 lockinit(m, desc, 0, LK_CANRECURSE);
98 return m;
99 }
100
101 void
102 snd_mtxfree(void *m)
103 {
104 struct lock *mtx = m;
105
106 lockuninit(mtx);
107 kfree(mtx, M_DEVBUF);
108 }
109
110 void
111 snd_mtxassert(void *m)
112 {
113 #ifdef INVARIANTS
114 struct lock *lk = m;
115
116 KKASSERT(lockstatus(lk, curthread) == LK_EXCLUSIVE);
117 #endif
118 }
119
120 int
121 snd_setup_intr(device_t dev, struct resource *res, int flags, driver_intr_t hand, void *param, void **cookiep)
122 {
123 struct snddev_info *d;
124
125 flags &= INTR_MPSAFE;
126 d = device_get_softc(dev);
127 if (d != NULL && (flags & INTR_MPSAFE))
128 d->flags |= SD_F_MPSAFE;
129
130 return bus_setup_intr(dev, res, flags, hand, param, cookiep, NULL);
131 }
132
133 static void
134 pcm_clonereset(struct snddev_info *d)
135 {
136 int cmax;
137
138 PCM_BUSYASSERT(d);
139
140 cmax = d->playcount + d->reccount - 1;
141 if (d->pvchancount > 0)
142 cmax += max(d->pvchancount, snd_maxautovchans) - 1;
143 if (d->rvchancount > 0)
144 cmax += max(d->rvchancount, snd_maxautovchans) - 1;
145 if (cmax > PCMMAXCLONE)
146 cmax = PCMMAXCLONE;
147 (void)snd_clone_gc(d->clones);
148 (void)snd_clone_setmaxunit(d->clones, cmax);
149 }
150
151 int
152 pcm_setvchans(struct snddev_info *d, int direction, int newcnt, int num)
153 {
154 struct pcm_channel *c, *ch, *nch;
155 struct pcmchan_caps *caps;
156 int i, err, vcnt;
157
158 PCM_BUSYASSERT(d);
159
160 if ((direction == PCMDIR_PLAY && d->playcount < 1) ||
161 (direction == PCMDIR_REC && d->reccount < 1))
162 return (ENODEV);
163
164 if (!(d->flags & SD_F_AUTOVCHAN))
165 return (EINVAL);
166
167 if (newcnt < 0 || newcnt > SND_MAXVCHANS)
168 return (E2BIG);
169
170 if (direction == PCMDIR_PLAY)
171 vcnt = d->pvchancount;
172 else if (direction == PCMDIR_REC)
173 vcnt = d->rvchancount;
174 else
175 return (EINVAL);
176
177 if (newcnt > vcnt) {
178 KASSERT(num == -1 ||
179 (num >= 0 && num < SND_MAXVCHANS && (newcnt - 1) == vcnt),
180 ("bogus vchan_create() request num=%d newcnt=%d vcnt=%d",
181 num, newcnt, vcnt));
182 /* add new vchans - find a parent channel first */
183 ch = NULL;
184 CHN_FOREACH(c, d, channels.pcm) {
185 CHN_LOCK(c);
186 if (c->direction == direction &&
187 ((c->flags & CHN_F_HAS_VCHAN) || (vcnt == 0 &&
188 c->refcount < 1 &&
189 !(c->flags & (CHN_F_BUSY | CHN_F_VIRTUAL))))) {
190 /*
191 * Reuse hw channel with vchans already
192 * created.
193 */
194 if (c->flags & CHN_F_HAS_VCHAN) {
195 ch = c;
196 break;
197 }
198 /*
199 * No vchans ever created, look for
200 * channels with supported formats.
201 */
202 caps = chn_getcaps(c);
203 if (caps == NULL) {
204 CHN_UNLOCK(c);
205 continue;
206 }
207 for (i = 0; caps->fmtlist[i] != 0; i++) {
208 if (caps->fmtlist[i] & AFMT_CONVERTIBLE)
209 break;
210 }
211 if (caps->fmtlist[i] != 0) {
212 ch = c;
213 break;
214 }
215 }
216 CHN_UNLOCK(c);
217 }
218 if (ch == NULL)
219 return (EBUSY);
220 ch->flags |= CHN_F_BUSY;
221 err = 0;
222 while (err == 0 && newcnt > vcnt) {
223 err = vchan_create(ch, num);
224 if (err == 0)
225 vcnt++;
226 else if (err == E2BIG && newcnt > vcnt)
227 device_printf(d->dev,
228 "%s: err=%d Maximum channel reached.\n",
229 __func__, err);
230 }
231 if (vcnt == 0)
232 ch->flags &= ~CHN_F_BUSY;
233 CHN_UNLOCK(ch);
234 if (err != 0)
235 return (err);
236 else
237 pcm_clonereset(d);
238 } else if (newcnt < vcnt) {
239 KASSERT(num == -1,
240 ("bogus vchan_destroy() request num=%d", num));
241 CHN_FOREACH(c, d, channels.pcm) {
242 CHN_LOCK(c);
243 if (c->direction != direction ||
244 CHN_EMPTY(c, children) ||
245 !(c->flags & CHN_F_HAS_VCHAN)) {
246 CHN_UNLOCK(c);
247 continue;
248 }
249 CHN_FOREACH_SAFE(ch, c, nch, children) {
250 CHN_LOCK(ch);
251 if (vcnt == 1 && c->refcount > 0) {
252 CHN_UNLOCK(ch);
253 break;
254 }
255 if (!(ch->flags & CHN_F_BUSY) &&
256 ch->refcount < 1) {
257 err = vchan_destroy(ch);
258 if (err == 0)
259 vcnt--;
260 } else
261 CHN_UNLOCK(ch);
262 if (vcnt == newcnt)
263 break;
264 }
265 CHN_UNLOCK(c);
266 break;
267 }
268 pcm_clonereset(d);
269 }
270
271 return (0);
272 }
273
274 /* return error status and a locked channel */
275 int
276 pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction,
277 pid_t pid, char *comm, int devunit)
278 {
279 struct pcm_channel *c;
280 int err, vchancount, vchan_num;
281
282 KASSERT(d != NULL && ch != NULL && (devunit == -1 ||
283 !(devunit & ~(SND_U_MASK | SND_D_MASK | SND_C_MASK))) &&
284 (direction == PCMDIR_PLAY || direction == PCMDIR_REC),
285 ("%s(): invalid d=%p ch=%p direction=%d pid=%d devunit=%d",
286 __func__, d, ch, direction, pid, devunit));
287 PCM_BUSYASSERT(d);
288
289 /* Double check again. */
290 if (devunit != -1) {
291 switch (snd_unit2d(devunit)) {
292 case SND_DEV_DSPHW_PLAY:
293 case SND_DEV_DSPHW_VPLAY:
294 if (direction != PCMDIR_PLAY)
295 return (ENOTSUP);
296 break;
297 case SND_DEV_DSPHW_REC:
298 case SND_DEV_DSPHW_VREC:
299 if (direction != PCMDIR_REC)
300 return (ENOTSUP);
301 break;
302 default:
303 if (!(direction == PCMDIR_PLAY ||
304 direction == PCMDIR_REC))
305 return (ENOTSUP);
306 break;
307 }
308 }
309
310 *ch = NULL;
311 vchan_num = 0;
312 vchancount = (direction == PCMDIR_PLAY) ? d->pvchancount :
313 d->rvchancount;
314
315 retry_chnalloc:
316 err = ENOTSUP;
317 /* scan for a free channel */
318 CHN_FOREACH(c, d, channels.pcm) {
319 CHN_LOCK(c);
320 if (devunit == -1 && c->direction == direction &&
321 (c->flags & CHN_F_VIRTUAL)) {
322 if (vchancount < snd_maxautovchans &&
323 vchan_num < CHN_CHAN(c)) {
324 CHN_UNLOCK(c);
325 goto vchan_alloc;
326 }
327 vchan_num++;
328 }
329 if (c->direction == direction && !(c->flags & CHN_F_BUSY) &&
330 (devunit == -1 || devunit == -2 || c->unit == devunit)) {
331 c->flags |= CHN_F_BUSY;
332 c->pid = pid;
333 strlcpy(c->comm, (comm != NULL) ? comm :
334 CHN_COMM_UNKNOWN, sizeof(c->comm));
335 *ch = c;
336 return (0);
337 } else if (c->unit == devunit) {
338 if (c->direction != direction)
339 err = ENOTSUP;
340 else if (c->flags & CHN_F_BUSY)
341 err = EBUSY;
342 else
343 err = EINVAL;
344 CHN_UNLOCK(c);
345 return (err);
346 } else if ((devunit == -1 || devunit == -2) &&
347 c->direction == direction && (c->flags & CHN_F_BUSY))
348 err = EBUSY;
349 CHN_UNLOCK(c);
350 }
351
352 if (devunit == -2)
353 return (err);
354
355 vchan_alloc:
356 /* no channel available */
357 if (devunit == -1 || snd_unit2d(devunit) == SND_DEV_DSPHW_VPLAY ||
358 snd_unit2d(devunit) == SND_DEV_DSPHW_VREC) {
359 if (!(vchancount > 0 && vchancount < snd_maxautovchans) &&
360 (devunit == -1 || snd_unit2c(devunit) < snd_maxautovchans))
361 return (err);
362 err = pcm_setvchans(d, direction, vchancount + 1,
363 (devunit == -1) ? -1 : snd_unit2c(devunit));
364 if (err == 0) {
365 if (devunit == -1)
366 devunit = -2;
367 goto retry_chnalloc;
368 }
369 }
370
371 return (err);
372 }
373
374 /* release a locked channel and unlock it */
375 int
376 pcm_chnrelease(struct pcm_channel *c)
377 {
378 PCM_BUSYASSERT(c->parentsnddev);
379 CHN_LOCKASSERT(c);
380
381 c->flags &= ~CHN_F_BUSY;
382 c->pid = -1;
383 strlcpy(c->comm, CHN_COMM_UNUSED, sizeof(c->comm));
384 CHN_UNLOCK(c);
385
386 return (0);
387 }
388
389 int
390 pcm_chnref(struct pcm_channel *c, int ref)
391 {
392 PCM_BUSYASSERT(c->parentsnddev);
393 CHN_LOCKASSERT(c);
394
395 c->refcount += ref;
396
397 return (c->refcount);
398 }
399
400 int
401 pcm_inprog(struct snddev_info *d, int delta)
402 {
403 PCM_LOCKASSERT(d);
404
405 d->inprog += delta;
406
407 return (d->inprog);
408 }
409
410 static void
411 pcm_setmaxautovchans(struct snddev_info *d, int num)
412 {
413 PCM_BUSYASSERT(d);
414
415 if (num < 0)
416 return;
417
418 if (num >= 0 && d->pvchancount > num)
419 (void)pcm_setvchans(d, PCMDIR_PLAY, num, -1);
420 else if (num > 0 && d->pvchancount == 0)
421 (void)pcm_setvchans(d, PCMDIR_PLAY, 1, -1);
422
423 if (num >= 0 && d->rvchancount > num)
424 (void)pcm_setvchans(d, PCMDIR_REC, num, -1);
425 else if (num > 0 && d->rvchancount == 0)
426 (void)pcm_setvchans(d, PCMDIR_REC, 1, -1);
427
428 pcm_clonereset(d);
429 }
430
431 static int
432 sysctl_hw_snd_default_unit(SYSCTL_HANDLER_ARGS)
433 {
434 struct snddev_info *d;
435 int error, unit;
436
437 unit = snd_unit;
438 error = sysctl_handle_int(oidp, &unit, 0, req);
439 if (error == 0 && req->newptr != NULL) {
440 d = devclass_get_softc(pcm_devclass, unit);
441 if (!PCM_REGISTERED(d) || CHN_EMPTY(d, channels.pcm))
442 return EINVAL;
443 snd_unit = unit;
444 snd_unit_auto = 0;
445 }
446 return (error);
447 }
448
449 /* XXX: do we need a way to let the user change the default unit? */
450 SYSCTL_PROC(_hw_snd, OID_AUTO, default_unit,
451 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_ANYBODY,
452 0, sizeof(int), sysctl_hw_snd_default_unit, "I",
453 "default sound device");
454
455 static int
456 sysctl_hw_snd_maxautovchans(SYSCTL_HANDLER_ARGS)
457 {
458 struct snddev_info *d;
459 int i, v, error;
460
461 v = snd_maxautovchans;
462 error = sysctl_handle_int(oidp, &v, 0, req);
463 if (error == 0 && req->newptr != NULL) {
464 if (v < 0)
465 v = 0;
466 if (v > SND_MAXVCHANS)
467 v = SND_MAXVCHANS;
468 snd_maxautovchans = v;
469 for (i = 0; pcm_devclass != NULL &&
470 i < devclass_get_maxunit(pcm_devclass); i++) {
471 d = devclass_get_softc(pcm_devclass, i);
472 if (!PCM_REGISTERED(d))
473 continue;
474 PCM_ACQUIRE_QUICK(d);
475 pcm_setmaxautovchans(d, v);
476 PCM_RELEASE_QUICK(d);
477 }
478 }
479 return (error);
480 }
481 SYSCTL_PROC(_hw_snd, OID_AUTO, maxautovchans, CTLTYPE_INT | CTLFLAG_RW,
482 0, sizeof(int), sysctl_hw_snd_maxautovchans, "I", "maximum virtual channel");
483
484 struct pcm_channel *
485 pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, int num, void *devinfo)
486 {
487 struct pcm_channel *ch;
488 int direction, err, rpnum, *pnum, max;
489 int udc, device, chan;
490 char *dirs, *devname, buf[CHN_NAMELEN];
491
492 PCM_BUSYASSERT(d);
493 PCM_LOCKASSERT(d);
494 KASSERT(num >= -1, ("invalid num=%d", num));
495
496
497 switch (dir) {
498 case PCMDIR_PLAY:
499 dirs = "play";
500 direction = PCMDIR_PLAY;
501 pnum = &d->playcount;
502 device = SND_DEV_DSPHW_PLAY;
503 max = SND_MAXHWCHAN;
504 break;
505 case PCMDIR_PLAY_VIRTUAL:
506 dirs = "virtual";
507 direction = PCMDIR_PLAY;
508 pnum = &d->pvchancount;
509 device = SND_DEV_DSPHW_VPLAY;
510 max = SND_MAXVCHANS;
511 break;
512 case PCMDIR_REC:
513 dirs = "record";
514 direction = PCMDIR_REC;
515 pnum = &d->reccount;
516 device = SND_DEV_DSPHW_REC;
517 max = SND_MAXHWCHAN;
518 break;
519 case PCMDIR_REC_VIRTUAL:
520 dirs = "virtual";
521 direction = PCMDIR_REC;
522 pnum = &d->rvchancount;
523 device = SND_DEV_DSPHW_VREC;
524 max = SND_MAXVCHANS;
525 break;
526 default:
527 return (NULL);
528 }
529
530 chan = (num == -1) ? 0 : num;
531
532 if (*pnum >= max || chan >= max)
533 return (NULL);
534
535 rpnum = 0;
536
537 CHN_FOREACH(ch, d, channels.pcm) {
538 if (CHN_DEV(ch) != device)
539 continue;
540 if (chan == CHN_CHAN(ch)) {
541 if (num != -1) {
542 device_printf(d->dev,
543 "channel num=%d allocated!\n", chan);
544 return (NULL);
545 }
546 chan++;
547 if (chan >= max) {
548 device_printf(d->dev,
549 "chan=%d > %d\n", chan, max);
550 return (NULL);
551 }
552 }
553 rpnum++;
554 }
555
556 if (*pnum != rpnum) {
557 device_printf(d->dev,
558 "%s(): WARNING: pnum screwed : dirs=%s pnum=%d rpnum=%d\n",
559 __func__, dirs, *pnum, rpnum);
560 return (NULL);
561 }
562
563 udc = snd_mkunit(device_get_unit(d->dev), device, chan);
564 devname = dsp_unit2name(buf, sizeof(buf), udc);
565
566 if (devname == NULL) {
567 device_printf(d->dev,
568 "Failed to query device name udc=0x%08x\n", udc);
569 return (NULL);
570 }
571
572 PCM_UNLOCK(d);
573 ch = kmalloc(sizeof(*ch), M_DEVBUF, M_WAITOK | M_ZERO);
574 ch->methods = kobj_create(cls, M_DEVBUF, M_WAITOK | M_ZERO);
575 ch->unit = udc;
576 ch->pid = -1;
577 strlcpy(ch->comm, CHN_COMM_UNUSED, sizeof(ch->comm));
578 ch->parentsnddev = d;
579 ch->parentchannel = parent;
580 ch->dev = d->dev;
581 ch->trigger = PCMTRIG_STOP;
582 ksnprintf(ch->name, sizeof(ch->name), "%s:%s:%s",
583 device_get_nameunit(ch->dev), dirs, devname);
584
585 err = chn_init(ch, devinfo, dir, direction);
586 PCM_LOCK(d);
587 if (err) {
588 device_printf(d->dev, "chn_init(%s) failed: err = %d\n",
589 ch->name, err);
590 kobj_delete(ch->methods, M_DEVBUF);
591 kfree(ch, M_DEVBUF);
592 return (NULL);
593 }
594
595 return (ch);
596 }
597
598 int
599 pcm_chn_destroy(struct pcm_channel *ch)
600 {
601 struct snddev_info *d;
602 int err;
603
604 d = ch->parentsnddev;
605 PCM_BUSYASSERT(d);
606
607 err = chn_kill(ch);
608 if (err) {
609 device_printf(ch->dev, "chn_kill(%s) failed, err = %d\n",
610 ch->name, err);
611 return (err);
612 }
613
614 kobj_delete(ch->methods, M_DEVBUF);
615 kfree(ch, M_DEVBUF);
616
617 return (0);
618 }
619
620 int
621 pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch)
622 {
623 PCM_BUSYASSERT(d);
624 PCM_LOCKASSERT(d);
625 KASSERT(ch != NULL && (ch->direction == PCMDIR_PLAY ||
626 ch->direction == PCMDIR_REC), ("Invalid pcm channel"));
627
628 CHN_INSERT_SORT_ASCEND(d, ch, channels.pcm);
629
630 switch (CHN_DEV(ch)) {
631 case SND_DEV_DSPHW_PLAY:
632 d->playcount++;
633 break;
634 case SND_DEV_DSPHW_VPLAY:
635 d->pvchancount++;
636 break;
637 case SND_DEV_DSPHW_REC:
638 d->reccount++;
639 break;
640 case SND_DEV_DSPHW_VREC:
641 d->rvchancount++;
642 break;
643 default:
644 break;
645 }
646
647 d->devcount++;
648
649 return (0);
650 }
651
652 int
653 pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch)
654 {
655 struct pcm_channel *tmp;
656
657 PCM_BUSYASSERT(d);
658 PCM_LOCKASSERT(d);
659
660 tmp = NULL;
661
662 CHN_FOREACH(tmp, d, channels.pcm) {
663 if (tmp == ch)
664 break;
665 }
666
667 if (tmp != ch)
668 return (EINVAL);
669
670 CHN_REMOVE(d, ch, channels.pcm);
671
672 switch (CHN_DEV(ch)) {
673 case SND_DEV_DSPHW_PLAY:
674 d->playcount--;
675 break;
676 case SND_DEV_DSPHW_VPLAY:
677 d->pvchancount--;
678 break;
679 case SND_DEV_DSPHW_REC:
680 d->reccount--;
681 break;
682 case SND_DEV_DSPHW_VREC:
683 d->rvchancount--;
684 break;
685 default:
686 break;
687 }
688
689 d->devcount--;
690
691 return (0);
692 }
693
694 int
695 pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo)
696 {
697 struct snddev_info *d = device_get_softc(dev);
698 struct pcm_channel *ch;
699 int err;
700
701 PCM_BUSYASSERT(d);
702
703 PCM_LOCK(d);
704 ch = pcm_chn_create(d, NULL, cls, dir, -1, devinfo);
705 if (!ch) {
706 device_printf(d->dev, "pcm_chn_create(%s, %d, %p) failed\n",
707 cls->name, dir, devinfo);
708 PCM_UNLOCK(d);
709 return (ENODEV);
710 }
711
712 err = pcm_chn_add(d, ch);
713 PCM_UNLOCK(d);
714 if (err) {
715 device_printf(d->dev, "pcm_chn_add(%s) failed, err=%d\n",
716 ch->name, err);
717 pcm_chn_destroy(ch);
718 }
719
720 return (err);
721 }
722
723 static int
724 pcm_killchan(device_t dev)
725 {
726 struct snddev_info *d = device_get_softc(dev);
727 struct pcm_channel *ch;
728 int error;
729
730 PCM_BUSYASSERT(d);
731
732 ch = CHN_FIRST(d, channels.pcm);
733
734 PCM_LOCK(d);
735 error = pcm_chn_remove(d, ch);
736 PCM_UNLOCK(d);
737 if (error)
738 return (error);
739 return (pcm_chn_destroy(ch));
740 }
741
742 static int
743 pcm_best_unit(int old)
744 {
745 struct snddev_info *d;
746 int i, best, bestprio, prio;
747
748 best = -1;
749 bestprio = -100;
750 for (i = 0; pcm_devclass != NULL &&
751 i < devclass_get_maxunit(pcm_devclass); i++) {
752 d = devclass_get_softc(pcm_devclass, i);
753 if (!PCM_REGISTERED(d))
754 continue;
755 prio = 0;
756 if (d->playcount == 0)
757 prio -= 10;
758 if (d->reccount == 0)
759 prio -= 2;
760 if (prio > bestprio || (prio == bestprio && i == old)) {
761 best = i;
762 bestprio = prio;
763 }
764 }
765 return (best);
766 }
767
768 int
769 pcm_setstatus(device_t dev, char *str)
770 {
771 struct snddev_info *d = device_get_softc(dev);
772
773 PCM_BUSYASSERT(d);
774
775 if (d->playcount == 0 || d->reccount == 0)
776 d->flags |= SD_F_SIMPLEX;
777
778 if ((d->playcount > 0 || d->reccount > 0) &&
779 !(d->flags & SD_F_AUTOVCHAN)) {
780 d->flags |= SD_F_AUTOVCHAN;
781 vchan_initsys(dev);
782 }
783
784 pcm_setmaxautovchans(d, snd_maxautovchans);
785
786 strlcpy(d->status, str, SND_STATUSLEN);
787
788 PCM_LOCK(d);
789
790 /* Last stage, enable cloning. */
791 if (d->clones != NULL)
792 (void)snd_clone_enable(d->clones);
793
794 /* Done, we're ready.. */
795 d->flags |= SD_F_REGISTERED;
796
797 PCM_RELEASE(d);
798
799 PCM_UNLOCK(d);
800
801 if (snd_unit_auto < 0)
802 snd_unit_auto = (snd_unit < 0) ? 1 : 0;
803 if (snd_unit < 0 || snd_unit_auto > 1) {
804 if (device_get_unit(dev) != snd_unit)
805 snd_unit = device_get_unit(dev);
806 } else if (snd_unit_auto == 1) {
807 snd_unit = pcm_best_unit(snd_unit);
808 }
809
810 return (0);
811 }
812
813 uint32_t
814 pcm_getflags(device_t dev)
815 {
816 struct snddev_info *d = device_get_softc(dev);
817
818 return d->flags;
819 }
820
821 void
822 pcm_setflags(device_t dev, uint32_t val)
823 {
824 struct snddev_info *d = device_get_softc(dev);
825
826 d->flags = val;
827 }
828
829 void *
830 pcm_getdevinfo(device_t dev)
831 {
832 struct snddev_info *d = device_get_softc(dev);
833
834 return d->devinfo;
835 }
836
837 unsigned int
838 pcm_getbuffersize(device_t dev, unsigned int minbufsz, unsigned int deflt, unsigned int maxbufsz)
839 {
840 struct snddev_info *d = device_get_softc(dev);
841 int sz, x;
842
843 sz = 0;
844 if (resource_int_value(device_get_name(dev), device_get_unit(dev), "buffersize", &sz) == 0) {
845 x = sz;
846 RANGE(sz, minbufsz, maxbufsz);
847 if (x != sz)
848 device_printf(dev, "'buffersize=%d' hint is out of range (%d-%d), using %d\n", x, minbufsz, maxbufsz, sz);
849 x = minbufsz;
850 while (x < sz)
851 x <<= 1;
852 if (x > sz)
853 x >>= 1;
854 if (x != sz) {
855 device_printf(dev, "'buffersize=%d' hint is not a power of 2, using %d\n", sz, x);
856 sz = x;
857 }
858 } else {
859 sz = deflt;
860 }
861
862 d->bufsz = sz;
863
864 return sz;
865 }
866
867 static int
868 sysctl_dev_pcm_bitperfect(SYSCTL_HANDLER_ARGS)
869 {
870 struct snddev_info *d;
871 int err, val;
872
873 d = oidp->oid_arg1;
874 if (!PCM_REGISTERED(d))
875 return (ENODEV);
876
877 PCM_LOCK(d);
878 PCM_WAIT(d);
879 val = (d->flags & SD_F_BITPERFECT) ? 1 : 0;
880 PCM_ACQUIRE(d);
881 PCM_UNLOCK(d);
882
883 err = sysctl_handle_int(oidp, &val, 0, req);
884
885 if (err == 0 && req->newptr != NULL) {
886 if (!(val == 0 || val == 1)) {
887 PCM_RELEASE_QUICK(d);
888 return (EINVAL);
889 }
890
891 PCM_LOCK(d);
892
893 d->flags &= ~SD_F_BITPERFECT;
894 d->flags |= (val != 0) ? SD_F_BITPERFECT : 0;
895
896 PCM_RELEASE(d);
897 PCM_UNLOCK(d);
898 } else
899 PCM_RELEASE_QUICK(d);
900
901 return (err);
902 }
903
904 #ifdef SND_DEBUG
905 static int
906 sysctl_dev_pcm_clone_flags(SYSCTL_HANDLER_ARGS)
907 {
908 struct snddev_info *d;
909 uint32_t flags;
910 int err;
911
912 d = oidp->oid_arg1;
913 if (!PCM_REGISTERED(d) || d->clones == NULL)
914 return (ENODEV);
915
916 PCM_ACQUIRE_QUICK(d);
917
918 flags = snd_clone_getflags(d->clones);
919 err = sysctl_handle_int(oidp, &flags, 0, req);
920
921 if (err == 0 && req->newptr != NULL) {
922 if (flags & ~SND_CLONE_MASK)
923 err = EINVAL;
924 else
925 (void)snd_clone_setflags(d->clones, flags);
926 }
927
928 PCM_RELEASE_QUICK(d);
929
930 return (err);
931 }
932
933 static int
934 sysctl_dev_pcm_clone_deadline(SYSCTL_HANDLER_ARGS)
935 {
936 struct snddev_info *d;
937 int err, deadline;
938
939 d = oidp->oid_arg1;
940 if (!PCM_REGISTERED(d) || d->clones == NULL)
941 return (ENODEV);
942
943 PCM_ACQUIRE_QUICK(d);
944
945 deadline = snd_clone_getdeadline(d->clones);
946 err = sysctl_handle_int(oidp, &deadline, 0, req);
947
948 if (err == 0 && req->newptr != NULL) {
949 if (deadline < 0)
950 err = EINVAL;
951 else
952 (void)snd_clone_setdeadline(d->clones, deadline);
953 }
954
955 PCM_RELEASE_QUICK(d);
956
957 return (err);
958 }
959
960 static int
961 sysctl_dev_pcm_clone_gc(SYSCTL_HANDLER_ARGS)
962 {
963 struct snddev_info *d;
964 int err, val;
965
966 d = oidp->oid_arg1;
967 if (!PCM_REGISTERED(d) || d->clones == NULL)
968 return (ENODEV);
969
970 val = 0;
971 err = sysctl_handle_int(oidp, &val, 0, req);
972
973 if (err == 0 && req->newptr != NULL && val != 0) {
974 PCM_ACQUIRE_QUICK(d);
975 val = snd_clone_gc(d->clones);
976 PCM_RELEASE_QUICK(d);
977 if (bootverbose != 0 || snd_verbose > 3)
978 device_printf(d->dev, "clone gc: pruned=%d\n", val);
979 }
980
981 return (err);
982 }
983
984 static int
985 sysctl_hw_snd_clone_gc(SYSCTL_HANDLER_ARGS)
986 {
987 struct snddev_info *d;
988 int i, err, val;
989
990 val = 0;
991 err = sysctl_handle_int(oidp, &val, 0, req);
992
993 if (err == 0 && req->newptr != NULL && val != 0) {
994 for (i = 0; pcm_devclass != NULL &&
995 i < devclass_get_maxunit(pcm_devclass); i++) {
996 d = devclass_get_softc(pcm_devclass, i);
997 if (!PCM_REGISTERED(d) || d->clones == NULL)
998 continue;
999 PCM_ACQUIRE_QUICK(d);
1000 val = snd_clone_gc(d->clones);
1001 PCM_RELEASE_QUICK(d);
1002 if (bootverbose != 0 || snd_verbose > 3)
1003 device_printf(d->dev, "clone gc: pruned=%d\n",
1004 val);
1005 }
1006 }
1007
1008 return (err);
1009 }
1010 SYSCTL_PROC(_hw_snd, OID_AUTO, clone_gc, CTLTYPE_INT | CTLFLAG_RW,
1011 0, sizeof(int), sysctl_hw_snd_clone_gc, "I",
1012 "global clone garbage collector");
1013 #endif
1014
1015 extern struct devfs_bitmap devfs_dsp_clone_bitmap;
1016
1017 int
1018 pcm_register(device_t dev, void *devinfo, int numplay, int numrec)
1019 {
1020 struct snddev_info *d;
1021 int i;
1022
1023 if (pcm_veto_load) {
1024 device_printf(dev, "disabled due to an error while initialising: %d\n", pcm_veto_load);
1025
1026 return EINVAL;
1027 }
1028
1029 if (device_get_unit(dev) > PCMMAXUNIT) {
1030 device_printf(dev, "PCMMAXUNIT reached : unit=%d > %d\n",
1031 device_get_unit(dev), PCMMAXUNIT);
1032 device_printf(dev,
1033 "Use 'hw.snd.maxunit' tunable to raise the limit.\n");
1034 return ENODEV;
1035 }
1036
1037 d = device_get_softc(dev);
1038 d->dev = dev;
1039 d->lock = snd_mtxcreate(device_get_nameunit(dev), "sound cdev");
1040 cv_init(&d->cv, device_get_nameunit(dev));
1041 PCM_ACQUIRE_QUICK(d);
1042 dsp_cdevinfo_init(d);
1043 #if 0
1044 /*
1045 * d->flags should be cleared by the allocator of the softc.
1046 * We cannot clear this field here because several devices set
1047 * this flag before calling pcm_register().
1048 */
1049 d->flags = 0;
1050 #endif
1051 i = 0;
1052 if (resource_int_value(device_get_name(dev), device_get_unit(dev),
1053 "vpc", &i) != 0 || i != 0)
1054 d->flags |= SD_F_VPC;
1055
1056 if (resource_int_value(device_get_name(dev), device_get_unit(dev),
1057 "bitperfect", &i) == 0 && i != 0)
1058 d->flags |= SD_F_BITPERFECT;
1059
1060 d->devinfo = devinfo;
1061 d->devcount = 0;
1062 d->reccount = 0;
1063 d->playcount = 0;
1064 d->pvchancount = 0;
1065 d->rvchancount = 0;
1066 d->pvchanrate = 0;
1067 d->pvchanformat = 0;
1068 d->rvchanrate = 0;
1069 d->rvchanformat = 0;
1070 d->inprog = 0;
1071
1072 /*
1073 * Create clone manager, disabled by default. Cloning will be
1074 * enabled during final stage of driver initialization through
1075 * pcm_setstatus().
1076 */
1077 d->clones = snd_clone_create(SND_U_MASK | SND_D_MASK, PCMMAXCLONE,
1078 SND_CLONE_DEADLINE_DEFAULT, SND_CLONE_WAITOK |
1079 SND_CLONE_GC_ENABLE | SND_CLONE_GC_UNREF |
1080 SND_CLONE_GC_LASTREF | SND_CLONE_GC_EXPIRED);
1081
1082 CHN_INIT(d, channels.pcm);
1083 CHN_INIT(d, channels.pcm.busy);
1084 CHN_INIT(d, channels.pcm.opened);
1085
1086 /* XXX This is incorrect, but lets play along for now. */
1087 if ((numplay == 0 || numrec == 0) && numplay != numrec)
1088 d->flags |= SD_F_SIMPLEX;
1089
1090 sysctl_ctx_init(&d->play_sysctl_ctx);
1091 d->play_sysctl_tree = SYSCTL_ADD_NODE(&d->play_sysctl_ctx,
1092 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "play",
1093 CTLFLAG_RD, 0, "playback channels node");
1094 sysctl_ctx_init(&d->rec_sysctl_ctx);
1095 d->rec_sysctl_tree = SYSCTL_ADD_NODE(&d->rec_sysctl_ctx,
1096 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "rec",
1097 CTLFLAG_RD, 0, "record channels node");
1098 /* XXX: an user should be able to set this with a control tool, the
1099 sysadmin then needs min+max sysctls for this */
1100 SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev),
1101 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
1102 OID_AUTO, "buffersize", CTLFLAG_RD, &d->bufsz, 0, "allocated buffer size");
1103 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
1104 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
1105 "bitperfect", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d),
1106 sysctl_dev_pcm_bitperfect, "I",
1107 "bit-perfect playback/recording (0=disable, 1=enable)");
1108 #ifdef SND_DEBUG
1109 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
1110 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
1111 "clone_flags", CTLTYPE_UINT | CTLFLAG_RW, d, sizeof(d),
1112 sysctl_dev_pcm_clone_flags, "IU",
1113 "clone flags");
1114 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
1115 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
1116 "clone_deadline", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d),
1117 sysctl_dev_pcm_clone_deadline, "I",
1118 "clone expiration deadline (ms)");
1119 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
1120 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
1121 "clone_gc", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d),
1122 sysctl_dev_pcm_clone_gc, "I",
1123 "clone garbage collector");
1124 #endif
1125
1126 if (numplay > 0 || numrec > 0) {
1127 d->flags |= SD_F_AUTOVCHAN;
1128 vchan_initsys(dev);
1129 }
1130
1131 if (d->flags & SD_F_EQ)
1132 feeder_eq_initsys(dev);
1133
1134 /* XXX use make_autoclone_dev? */
1135 /* XXX PCMMAXCHAN can be created for regular channels */
1136 d->dsp_clonedev = make_dev(&dsp_ops,
1137 PCMMKMINOR(device_get_unit(dev), SND_DEV_DSP, 0),
1138 UID_ROOT, GID_WHEEL, 0666, "dsp%d",
1139 device_get_unit(dev));
1140 devfs_clone_handler_add(devtoname(d->dsp_clonedev), dsp_clone);
1141
1142 sndstat_register(dev, d->status, sndstat_prepare_pcm);
1143
1144 return 0;
1145 }
1146
1147 int
1148 pcm_unregister(device_t dev)
1149 {
1150 struct snddev_info *d;
1151 struct pcm_channel *ch;
1152 struct thread *td;
1153
1154 td = curthread;
1155 d = device_get_softc(dev);
1156
1157 if (!PCM_ALIVE(d)) {
1158 device_printf(dev, "unregister: device not configured\n");
1159 return (0);
1160 }
1161
1162 if (sndstat_acquire(td) != 0) {
1163 device_printf(dev, "unregister: sndstat busy\n");
1164 return (EBUSY);
1165 }
1166
1167 PCM_LOCK(d);
1168 PCM_WAIT(d);
1169
1170 if (d->inprog != 0) {
1171 device_printf(dev, "unregister: operation in progress\n");
1172 PCM_UNLOCK(d);
1173 sndstat_release(td);
1174 return (EBUSY);
1175 }
1176
1177 PCM_ACQUIRE(d);
1178 PCM_UNLOCK(d);
1179
1180 CHN_FOREACH(ch, d, channels.pcm) {
1181 CHN_LOCK(ch);
1182 if (ch->refcount > 0) {
1183 device_printf(dev,
1184 "unregister: channel %s busy (pid %d)\n",
1185 ch->name, ch->pid);
1186 CHN_UNLOCK(ch);
1187 PCM_RELEASE_QUICK(d);
1188 sndstat_release(td);
1189 return (EBUSY);
1190 }
1191 CHN_UNLOCK(ch);
1192 }
1193
1194 if (d->clones != NULL) {
1195 if (snd_clone_busy(d->clones) != 0) {
1196 device_printf(dev, "unregister: clone busy\n");
1197 PCM_RELEASE_QUICK(d);
1198 sndstat_release(td);
1199 return (EBUSY);
1200 } else {
1201 PCM_LOCK(d);
1202 (void)snd_clone_disable(d->clones);
1203 PCM_UNLOCK(d);
1204 }
1205 }
1206
1207 if (mixer_uninit(dev) == EBUSY) {
1208 device_printf(dev, "unregister: mixer busy\n");
1209 PCM_LOCK(d);
1210 if (d->clones != NULL)
1211 (void)snd_clone_enable(d->clones);
1212 PCM_RELEASE(d);
1213 PCM_UNLOCK(d);
1214 sndstat_release(td);
1215 return (EBUSY);
1216 }
1217
1218 PCM_LOCK(d);
1219 d->flags |= SD_F_DYING;
1220 d->flags &= ~SD_F_REGISTERED;
1221 PCM_UNLOCK(d);
1222
1223 /*
1224 * No lock being held, so this thing can be flushed without
1225 * stucking into devdrn oblivion.
1226 */
1227 if (d->clones != NULL) {
1228 snd_clone_destroy(d->clones);
1229 d->clones = NULL;
1230 }
1231 devfs_clone_handler_del(devtoname(d->dsp_clonedev));
1232 destroy_dev(d->dsp_clonedev);
1233
1234 if (d->play_sysctl_tree != NULL) {
1235 sysctl_ctx_free(&d->play_sysctl_ctx);
1236 d->play_sysctl_tree = NULL;
1237 }
1238 if (d->rec_sysctl_tree != NULL) {
1239 sysctl_ctx_free(&d->rec_sysctl_ctx);
1240 d->rec_sysctl_tree = NULL;
1241 }
1242
1243 while (!CHN_EMPTY(d, channels.pcm))
1244 pcm_killchan(dev);
1245
1246 dsp_cdevinfo_flush(d);
1247
1248 PCM_LOCK(d);
1249 PCM_RELEASE(d);
1250 cv_destroy(&d->cv);
1251 PCM_UNLOCK(d);
1252 snd_mtxfree(d->lock);
1253 sndstat_unregister(dev);
1254 sndstat_release(td);
1255
1256 if (snd_unit == device_get_unit(dev)) {
1257 snd_unit = pcm_best_unit(-1);
1258 if (snd_unit_auto == 0)
1259 snd_unit_auto = 1;
1260 }
1261
1262 return (0);
1263 }
1264
1265 /************************************************************************/
1266
1267 /**
1268 * @brief Handle OSSv4 SNDCTL_SYSINFO ioctl.
1269 *
1270 * @param si Pointer to oss_sysinfo struct where information about the
1271 * sound subsystem will be written/copied.
1272 *
1273 * This routine returns information about the sound system, such as the
1274 * current OSS version, number of audio, MIDI, and mixer drivers, etc.
1275 * Also includes a bitmask showing which of the above types of devices
1276 * are open (busy).
1277 *
1278 * @note
1279 * Calling threads must not hold any snddev_info or pcm_channel locks.
1280 *
1281 * @author Ryan Beasley <ryanb@FreeBSD.org>
1282 */
1283 void
1284 sound_oss_sysinfo(oss_sysinfo *si)
1285 {
1286 static char si_product[] = "FreeBSD native OSS ABI";
1287 static char si_version[] = __XSTRING(__FreeBSD_version);
1288 static char si_license[] = "BSD";
1289 static int intnbits = sizeof(int) * 8; /* Better suited as macro?
1290 Must pester a C guru. */
1291
1292 struct snddev_info *d;
1293 struct pcm_channel *c;
1294 int i, j, ncards;
1295
1296 ncards = 0;
1297
1298 strlcpy(si->product, si_product, sizeof(si->product));
1299 strlcpy(si->version, si_version, sizeof(si->version));
1300 si->versionnum = SOUND_VERSION;
1301 strlcpy(si->license, si_license, sizeof(si->license));
1302
1303 /*
1304 * Iterate over PCM devices and their channels, gathering up data
1305 * for the numaudios, ncards, and openedaudio fields.
1306 */
1307 si->numaudios = 0;
1308 bzero((void *)&si->openedaudio, sizeof(si->openedaudio));
1309
1310 j = 0;
1311
1312 for (i = 0; pcm_devclass != NULL &&
1313 i < devclass_get_maxunit(pcm_devclass); i++) {
1314 d = devclass_get_softc(pcm_devclass, i);
1315 if (!PCM_REGISTERED(d))
1316 continue;
1317
1318 /* XXX Need Giant magic entry ??? */
1319
1320 /* See note in function's docblock */
1321 PCM_UNLOCKASSERT(d);
1322 PCM_LOCK(d);
1323
1324 si->numaudios += d->devcount;
1325 ++ncards;
1326
1327 CHN_FOREACH(c, d, channels.pcm) {
1328 CHN_UNLOCKASSERT(c);
1329 CHN_LOCK(c);
1330 if (c->flags & CHN_F_BUSY)
1331 si->openedaudio[j / intnbits] |=
1332 (1 << (j % intnbits));
1333 CHN_UNLOCK(c);
1334 j++;
1335 }
1336
1337 PCM_UNLOCK(d);
1338 }
1339 si->numaudioengines = si->numaudios;
1340
1341 si->numsynths = 0; /* OSSv4 docs: this field is obsolete */
1342 /**
1343 * @todo Collect num{midis,timers}.
1344 *
1345 * Need access to sound/midi/midi.c::midistat_lock in order
1346 * to safely touch midi_devices and get a head count of, well,
1347 * MIDI devices. midistat_lock is a global static (i.e., local to
1348 * midi.c), but midi_devices is a regular global; should the mutex
1349 * be publicized, or is there another way to get this information?
1350 *
1351 * NB: MIDI/sequencer stuff is currently on hold.
1352 */
1353 si->nummidis = 0;
1354 si->numtimers = 0;
1355 si->nummixers = mixer_count;
1356 si->numcards = ncards;
1357 /* OSSv4 docs: Intended only for test apps; API doesn't
1358 really have much of a concept of cards. Shouldn't be
1359 used by applications. */
1360
1361 /**
1362 * @todo Fill in "busy devices" fields.
1363 *
1364 * si->openedmidi = " MIDI devices
1365 */
1366 bzero((void *)&si->openedmidi, sizeof(si->openedmidi));
1367
1368 /*
1369 * Si->filler is a reserved array, but according to docs each
1370 * element should be set to -1.
1371 */
1372 for (i = 0; i < sizeof(si->filler)/sizeof(si->filler[0]); i++)
1373 si->filler[i] = -1;
1374 }
1375
1376 int
1377 sound_oss_card_info(oss_card_info *si)
1378 {
1379 struct snddev_info *d;
1380 int i, ncards;
1381
1382 ncards = 0;
1383
1384 for (i = 0; pcm_devclass != NULL &&
1385 i < devclass_get_maxunit(pcm_devclass); i++) {
1386 d = devclass_get_softc(pcm_devclass, i);
1387 if (!PCM_REGISTERED(d))
1388 continue;
1389
1390 if (ncards++ != si->card)
1391 continue;
1392
1393 PCM_UNLOCKASSERT(d);
1394 PCM_LOCK(d);
1395
1396 strlcpy(si->shortname, device_get_nameunit(d->dev),
1397 sizeof(si->shortname));
1398 strlcpy(si->longname, device_get_desc(d->dev),
1399 sizeof(si->longname));
1400 strlcpy(si->hw_info, d->status, sizeof(si->hw_info));
1401 si->intr_count = si->ack_count = 0;
1402
1403 PCM_UNLOCK(d);
1404
1405 return (0);
1406 }
1407 return (ENXIO);
1408 }
1409
1410 /************************************************************************/
1411
1412 static int
1413 sound_modevent(module_t mod, int type, void *data)
1414 {
1415 int ret;
1416
1417 ret = 0;
1418
1419 switch(type) {
1420 case MOD_LOAD:
1421 pcmsg_unrhdr = new_unrhdr(1, INT_MAX, NULL);
1422 default_dsp = make_dev(&dsp_ops,
1423 PCMMKMINOR(PCMUNIT_DEFAULT,
1424 SND_DEV_DSP, 0),
1425 UID_ROOT, GID_WHEEL, 0666, "dsp");
1426 devfs_clone_handler_add("dsp", dsp_clone);
1427 default_mixer = make_dev(&mixer_ops,
1428 PCMMKMINOR(PCMUNIT_DEFAULT, 0, 0),
1429 UID_ROOT, GID_WHEEL, 0666, "mixer");
1430 devfs_clone_handler_add("mixer", mixer_clone);
1431 break;
1432 case MOD_UNLOAD:
1433 ret = sndstat_acquire(curthread);
1434 if (ret != 0)
1435 break;
1436 if (default_dsp)
1437 destroy_dev(default_dsp);
1438 if (default_mixer)
1439 destroy_dev(default_mixer);
1440 if (pcmsg_unrhdr != NULL) {
1441 delete_unrhdr(pcmsg_unrhdr);
1442 pcmsg_unrhdr = NULL;
1443 }
1444 break;
1445 case MOD_SHUTDOWN:
1446 break;
1447 default:
1448 ret = ENOTSUP;
1449 break;
1450 }
1451 return ret;
1452 }
1453
1454 DEV_MODULE(sound, sound_modevent, NULL);
1455 MODULE_VERSION(sound, SOUND_MODVER);
DragonFly BSD