2 * Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sys/dev/sound/pcm/dsp.c,v 1.80.2.6 2006/04/04 17:43:48 ariff Exp $
29 #include <sys/param.h>
30 #include <sys/queue.h>
31 #include <sys/event.h>
33 #include <dev/sound/pcm/dsp.h>
34 #include <dev/sound/pcm/sound.h>
39 static d_open_t dsp_open;
40 static d_close_t dsp_close;
41 static d_read_t dsp_read;
42 static d_write_t dsp_write;
43 static d_ioctl_t dsp_ioctl;
44 static d_kqfilter_t dsp_kqfilter;
45 static d_mmap_t dsp_mmap;
47 static void dsp_filter_detach(struct knote *);
48 static int dsp_filter_read(struct knote *, long);
49 static int dsp_filter_write(struct knote *, long);
51 struct dev_ops dsp_ops = {
53 /*.d_flags = D_NEEDGIANT,*/
59 .d_kqfilter = dsp_kqfilter,
64 dsp_get_info(struct cdev *dev)
66 struct snddev_info *d;
70 if (unit >= devclass_get_maxunit(pcm_devclass))
72 d = devclass_get_softc(pcm_devclass, unit);
78 dsp_get_flags(struct cdev *dev)
84 if (unit >= devclass_get_maxunit(pcm_devclass))
86 bdev = devclass_get_device(pcm_devclass, unit);
88 return pcm_getflags(bdev);
92 dsp_set_flags(struct cdev *dev, u_int32_t flags)
98 if (unit >= devclass_get_maxunit(pcm_devclass))
100 bdev = devclass_get_device(pcm_devclass, unit);
102 pcm_setflags(bdev, flags);
106 * return the channels associated with an open device instance.
107 * set the priority if the device is simplex and one direction (only) is
109 * lock channels specified.
112 getchns(struct cdev *dev, struct pcm_channel **rdch, struct pcm_channel **wrch, u_int32_t prio)
114 struct snddev_info *d;
117 flags = dsp_get_flags(dev);
118 d = dsp_get_info(dev);
121 KASSERT((flags & SD_F_PRIO_SET) != SD_F_PRIO_SET, \
122 ("getchns: read and write both prioritised"));
124 if ((flags & SD_F_PRIO_SET) == 0 && (prio != (SD_F_PRIO_RD | SD_F_PRIO_WR))) {
125 flags |= prio & (SD_F_PRIO_RD | SD_F_PRIO_WR);
126 dsp_set_flags(dev, flags);
129 *rdch = dev->si_drv1;
130 *wrch = dev->si_drv2;
131 if ((flags & SD_F_SIMPLEX) && (flags & SD_F_PRIO_SET)) {
133 if (*rdch && flags & SD_F_PRIO_WR) {
135 *rdch = pcm_getfakechan(d);
136 } else if (*wrch && flags & SD_F_PRIO_RD) {
138 *wrch = pcm_getfakechan(d);
142 pcm_getfakechan(d)->flags |= CHN_F_BUSY;
146 if (*rdch && *rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD))
148 if (*wrch && *wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR))
154 /* unlock specified channels */
156 relchns(struct cdev *dev, struct pcm_channel *rdch, struct pcm_channel *wrch, u_int32_t prio)
158 struct snddev_info *d;
160 d = dsp_get_info(dev);
161 if (wrch && wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR))
163 if (rdch && rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD))
169 dsp_open(struct dev_open_args *ap)
171 struct cdev *i_dev = ap->a_head.a_dev;
172 struct thread *td = curthread;
173 int flags = ap->a_oflags;
174 struct pcm_channel *rdch, *wrch;
175 struct snddev_info *d = NULL;
176 struct snddev_channel *sce = NULL;
177 u_int32_t fmt = AFMT_U8;
186 d = dsp_get_info(i_dev);
187 SLIST_FOREACH(sce, &d->channels, link) {
188 if (sce->dsp_dev == i_dev)
202 if ((flags & (FREAD | FWRITE)) == 0) {
207 chnum = PCMCHAN(i_dev);
209 /* lock snddev so nobody else can monkey with it */
212 rdch = i_dev->si_drv1;
213 wrch = i_dev->si_drv2;
215 if (rdch || wrch || ((dsp_get_flags(i_dev) & SD_F_SIMPLEX) &&
216 (flags & (FREAD | FWRITE)) == (FREAD | FWRITE))) {
217 /* simplex or not, better safe than sorry. */
224 * if we get here, the open request is valid- either:
225 * * we were previously not open
226 * * we were open for play xor record and the opener wants
227 * the non-open direction
232 error = pcm_chnalloc(d, &rdch, PCMDIR_REC, td->td_proc->p_pid, chnum);
233 if (error != 0 && error != EBUSY && chnum != -1 && (flags & FWRITE))
234 error = pcm_chnalloc(d, &rdch, PCMDIR_REC, td->td_proc->p_pid, -1);
236 if (error == 0 && (chn_reset(rdch, fmt) ||
237 (fmt && chn_setspeed(rdch, DSP_DEFAULT_SPEED))))
242 pcm_chnrelease(rdch);
251 if (flags & FWRITE) {
254 error = pcm_chnalloc(d, &wrch, PCMDIR_PLAY, td->td_proc->p_pid, chnum);
255 if (error != 0 && error != EBUSY && chnum != -1 && (flags & FREAD))
256 error = pcm_chnalloc(d, &wrch, PCMDIR_PLAY, td->td_proc->p_pid, -1);
258 if (error == 0 && (chn_reset(wrch, fmt) ||
259 (fmt && chn_setspeed(wrch, DSP_DEFAULT_SPEED))))
264 pcm_chnrelease(wrch);
267 * Lock, deref and release previously created record channel
270 pcm_chnref(rdch, -1);
271 pcm_chnrelease(rdch);
282 i_dev->si_drv1 = rdch;
283 i_dev->si_drv2 = wrch;
291 if (i_dev != NULL && sce != NULL && sce->open == 0) {
301 dsp_close(struct dev_close_args *ap)
303 struct cdev *i_dev = ap->a_head.a_dev;
304 struct pcm_channel *rdch, *wrch;
305 struct snddev_info *d;
306 struct snddev_channel *sce = NULL;
309 d = dsp_get_info(i_dev);
311 rdch = i_dev->si_drv1;
312 wrch = i_dev->si_drv2;
313 i_dev->si_drv1 = NULL;
314 i_dev->si_drv2 = NULL;
316 SLIST_FOREACH(sce, &d->channels, link) {
317 if (sce->dsp_dev == i_dev)
329 refs += pcm_chnref(rdch, -1);
330 chn_abort(rdch); /* won't sleep */
331 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD);
333 pcm_chnrelease(rdch);
337 refs += pcm_chnref(wrch, -1);
339 * XXX: Maybe the right behaviour is to abort on non_block.
340 * It seems that mplayer flushes the audio queue by quickly
341 * closing and re-opening. In FBSD, there's a long pause
342 * while the audio queue flushes that I presume isn't there in
345 chn_flush(wrch); /* may sleep */
346 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD);
348 pcm_chnrelease(wrch);
353 * If there are no more references, release the channels.
356 if (pcm_getfakechan(d))
357 pcm_getfakechan(d)->flags = 0;
358 /* What is this?!? */
359 dsp_set_flags(i_dev, dsp_get_flags(i_dev) & ~SD_F_TRANSIENT);
367 dsp_read(struct dev_read_args *ap)
369 struct cdev *i_dev = ap->a_head.a_dev;
370 struct uio *buf = ap->a_uio;
371 int flag = ap->a_ioflag;
372 struct pcm_channel *rdch, *wrch;
375 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD);
377 KASSERT(rdch, ("dsp_read: nonexistant channel"));
378 KASSERT(rdch->flags & CHN_F_BUSY, ("dsp_read: nonbusy channel"));
380 if (rdch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) {
381 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD);
384 if (!(rdch->flags & CHN_F_RUNNING))
385 rdch->flags |= CHN_F_RUNNING;
386 ret = chn_read(rdch, buf, flag);
387 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD);
393 dsp_write(struct dev_write_args *ap)
395 struct cdev *i_dev = ap->a_head.a_dev;
396 struct uio *buf = ap->a_uio;
397 int flag = ap->a_ioflag;
398 struct pcm_channel *rdch, *wrch;
401 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_WR);
403 KASSERT(wrch, ("dsp_write: nonexistant channel"));
404 KASSERT(wrch->flags & CHN_F_BUSY, ("dsp_write: nonbusy channel"));
406 if (wrch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) {
407 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR);
410 if (!(wrch->flags & CHN_F_RUNNING))
411 wrch->flags |= CHN_F_RUNNING;
412 ret = chn_write(wrch, buf, flag);
413 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR);
419 dsp_ioctl(struct dev_ioctl_args *ap)
421 struct cdev *i_dev = ap->a_head.a_dev;
422 u_long cmd = ap->a_cmd;
423 caddr_t arg = ap->a_data;
424 struct pcm_channel *chn, *rdch, *wrch;
425 struct snddev_info *d;
427 int ret = 0, *arg_i = (int *)arg, tmp;
429 d = dsp_get_info(i_dev);
430 getchns(i_dev, &rdch, &wrch, 0);
433 if (wrch && (wrch->flags & CHN_F_DEAD))
435 if (rdch && (rdch->flags & CHN_F_DEAD))
438 relchns(i_dev, rdch, wrch, 0);
447 * 4Front OSS specifies that dsp devices allow mixer controls to
448 * control PCM == their volume.
450 if (IOCGROUP(cmd) == 'M') {
452 * For now only set the channel volume for vchans, pass
453 * all others to the mixer.
455 if (wrch != NULL && wrch->flags & CHN_F_VIRTUAL &&
456 (cmd & 0xff) == SOUND_MIXER_PCM) {
457 if ((cmd & MIXER_WRITE(0)) == MIXER_WRITE(0)) {
458 int vol_raw = *(int *)arg;
459 int vol_left, vol_right;
461 vol_left = min(vol_raw & 0x00ff, 100);
462 vol_right = min((vol_raw & 0xff00) >> 8, 100);
463 ret = chn_setvolume(wrch, vol_left, vol_right);
465 *(int *)arg = wrch->volume;
468 ap->a_head.a_dev = d->mixer_dev;
469 ret = mixer_ioctl(ap);
472 relchns(i_dev, rdch, wrch, 0);
479 * we start with the new ioctl interface.
481 case AIONWRITE: /* how many bytes can write ? */
485 if (wrch && wrch->bufhard.dl)
486 while (chn_wrfeed(wrch) == 0);
488 *arg_i = sndbuf_getfree(wrch->bufsoft);
496 case AIOSSIZE: /* set the current blocksize */
498 struct snd_size *p = (struct snd_size *)arg;
504 chn_setblocksize(wrch, 2, p->play_size);
505 p->play_size = sndbuf_getblksz(wrch->bufsoft);
510 chn_setblocksize(rdch, 2, p->rec_size);
511 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
516 case AIOGSIZE: /* get the current blocksize */
518 struct snd_size *p = (struct snd_size *)arg;
522 p->play_size = sndbuf_getblksz(wrch->bufsoft);
527 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
536 snd_chan_param *p = (snd_chan_param *)arg;
538 if (cmd == AIOSFMT &&
539 ((p->play_format != 0 && p->play_rate == 0) ||
540 (p->rec_format != 0 && p->rec_rate == 0))) {
546 if (cmd == AIOSFMT && p->play_format != 0) {
547 chn_setformat(wrch, p->play_format);
548 chn_setspeed(wrch, p->play_rate);
550 p->play_rate = wrch->speed;
551 p->play_format = wrch->format;
559 if (cmd == AIOSFMT && p->rec_format != 0) {
560 chn_setformat(rdch, p->rec_format);
561 chn_setspeed(rdch, p->rec_rate);
563 p->rec_rate = rdch->speed;
564 p->rec_format = rdch->format;
573 case AIOGCAP: /* get capabilities */
575 snd_capabilities *p = (snd_capabilities *)arg;
576 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL;
581 rcaps = chn_getcaps(rdch);
585 pcaps = chn_getcaps(wrch);
587 p->rate_min = max(rcaps? rcaps->minspeed : 0,
588 pcaps? pcaps->minspeed : 0);
589 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000,
590 pcaps? pcaps->maxspeed : 1000000);
591 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000,
592 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000);
593 /* XXX bad on sb16 */
594 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) &
595 (wrch? chn_getformats(wrch) : 0xffffffff);
597 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX;
599 p->mixers = 1; /* default: one mixer */
600 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0;
601 p->left = p->right = 100;
610 if (*arg_i == AIOSYNC_PLAY && wrch) {
612 *arg_i = chn_abort(wrch);
614 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) {
616 *arg_i = chn_abort(rdch);
619 kprintf("AIOSTOP: bad channel 0x%x\n", *arg_i);
625 kprintf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
626 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos);
630 * here follow the standard ioctls (filio.h etc.)
632 case FIONREAD: /* get # bytes to read */
635 /* if (rdch && rdch->bufhard.dl)
636 while (chn_rdfeed(rdch) == 0);
638 *arg_i = sndbuf_getready(rdch->bufsoft);
646 case FIOASYNC: /*set/clear async i/o */
647 DEB( kprintf("FIOASYNC\n") ; )
650 case SNDCTL_DSP_NONBLOCK:
651 case FIONBIO: /* set/clear non-blocking i/o */
655 rdch->flags |= CHN_F_NBIO;
657 rdch->flags &= ~CHN_F_NBIO;
663 wrch->flags |= CHN_F_NBIO;
665 wrch->flags &= ~CHN_F_NBIO;
671 * Finally, here is the linux-compatible ioctl interface
673 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int)
674 case THE_REAL_SNDCTL_DSP_GETBLKSIZE:
675 case SNDCTL_DSP_GETBLKSIZE:
676 chn = wrch ? wrch : rdch;
679 *arg_i = sndbuf_getblksz(chn->bufsoft);
687 case SNDCTL_DSP_SETBLKSIZE:
688 RANGE(*arg_i, 16, 65536);
691 chn_setblocksize(wrch, 2, *arg_i);
696 chn_setblocksize(rdch, 2, *arg_i);
701 case SNDCTL_DSP_RESET:
702 DEB(kprintf("dsp reset\n"));
717 case SNDCTL_DSP_SYNC:
718 DEB(kprintf("dsp sync\n"));
719 /* chn_sync may sleep */
722 chn_sync(wrch, sndbuf_getsize(wrch->bufsoft) - 4);
727 case SNDCTL_DSP_SPEED:
728 /* chn_setspeed may sleep */
732 ret = chn_setspeed(wrch, *arg_i);
736 if (rdch && ret == 0) {
738 ret = chn_setspeed(rdch, *arg_i);
746 case SOUND_PCM_READ_RATE:
747 chn = wrch ? wrch : rdch;
758 case SNDCTL_DSP_STEREO:
760 *arg_i = (*arg_i)? AFMT_STEREO : 0;
763 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i);
764 tmp = (wrch->format & AFMT_STEREO)? 1 : 0;
767 if (rdch && ret == 0) {
769 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i);
771 tmp = (rdch->format & AFMT_STEREO)? 1 : 0;
777 case SOUND_PCM_WRITE_CHANNELS:
778 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */
781 *arg_i = (*arg_i != 1)? AFMT_STEREO : 0;
784 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i);
785 tmp = (wrch->format & AFMT_STEREO)? 2 : 1;
788 if (rdch && ret == 0) {
790 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i);
792 tmp = (rdch->format & AFMT_STEREO)? 2 : 1;
797 chn = wrch ? wrch : rdch;
799 *arg_i = (chn->format & AFMT_STEREO) ? 2 : 1;
804 case SOUND_PCM_READ_CHANNELS:
805 chn = wrch ? wrch : rdch;
808 *arg_i = (chn->format & AFMT_STEREO) ? 2 : 1;
816 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */
817 chn = wrch ? wrch : rdch;
820 *arg_i = chn_getformats(chn);
828 case SNDCTL_DSP_SETFMT: /* sets _one_ format */
829 if ((*arg_i != AFMT_QUERY)) {
833 ret = chn_setformat(wrch, (*arg_i) | (wrch->format & AFMT_STEREO));
834 tmp = wrch->format & ~AFMT_STEREO;
837 if (rdch && ret == 0) {
839 ret = chn_setformat(rdch, (*arg_i) | (rdch->format & AFMT_STEREO));
841 tmp = rdch->format & ~AFMT_STEREO;
846 chn = wrch ? wrch : rdch;
848 *arg_i = chn->format & ~AFMT_STEREO;
853 case SNDCTL_DSP_SETFRAGMENT:
854 DEB(kprintf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg));
856 u_int32_t fragln = (*arg_i) & 0x0000ffff;
857 u_int32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16;
859 u_int32_t r_maxfrags, r_fragsz;
861 RANGE(fragln, 4, 16);
862 fragsz = 1 << fragln;
865 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
868 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE)
869 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
871 DEB(kprintf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz));
874 ret = chn_setblocksize(rdch, maxfrags, fragsz);
875 r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft);
876 r_fragsz = sndbuf_getblksz(rdch->bufsoft);
879 r_maxfrags = maxfrags;
882 if (wrch && ret == 0) {
884 ret = chn_setblocksize(wrch, maxfrags, fragsz);
885 maxfrags = sndbuf_getblkcnt(wrch->bufsoft);
886 fragsz = sndbuf_getblksz(wrch->bufsoft);
888 } else { /* use whatever came from the read channel */
889 maxfrags = r_maxfrags;
898 *arg_i = (maxfrags << 16) | fragln;
902 case SNDCTL_DSP_GETISPACE:
903 /* return the size of data available in the input queue */
905 audio_buf_info *a = (audio_buf_info *)arg;
907 struct snd_dbuf *bs = rdch->bufsoft;
910 a->bytes = sndbuf_getready(bs);
911 a->fragments = a->bytes / sndbuf_getblksz(bs);
912 a->fragstotal = sndbuf_getblkcnt(bs);
913 a->fragsize = sndbuf_getblksz(bs);
919 case SNDCTL_DSP_GETOSPACE:
920 /* return space available in the output queue */
922 audio_buf_info *a = (audio_buf_info *)arg;
924 struct snd_dbuf *bs = wrch->bufsoft;
927 /* XXX abusive DMA update: chn_wrupdate(wrch); */
928 a->bytes = sndbuf_getfree(bs);
929 a->fragments = a->bytes / sndbuf_getblksz(bs);
930 a->fragstotal = sndbuf_getblkcnt(bs);
931 a->fragsize = sndbuf_getblksz(bs);
937 case SNDCTL_DSP_GETIPTR:
939 count_info *a = (count_info *)arg;
941 struct snd_dbuf *bs = rdch->bufsoft;
944 /* XXX abusive DMA update: chn_rdupdate(rdch); */
945 a->bytes = sndbuf_gettotal(bs);
946 a->blocks = sndbuf_getblocks(bs) - rdch->blocks;
947 a->ptr = sndbuf_getreadyptr(bs);
948 rdch->blocks = sndbuf_getblocks(bs);
955 case SNDCTL_DSP_GETOPTR:
957 count_info *a = (count_info *)arg;
959 struct snd_dbuf *bs = wrch->bufsoft;
962 /* XXX abusive DMA update: chn_wrupdate(wrch); */
963 a->bytes = sndbuf_gettotal(bs);
964 a->blocks = sndbuf_getblocks(bs) - wrch->blocks;
965 a->ptr = sndbuf_getreadyptr(bs);
966 wrch->blocks = sndbuf_getblocks(bs);
973 case SNDCTL_DSP_GETCAPS:
974 *arg_i = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER;
975 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX))
976 *arg_i |= DSP_CAP_DUPLEX;
979 case SOUND_PCM_READ_BITS:
980 chn = wrch ? wrch : rdch;
983 if (chn->format & AFMT_8BIT)
985 else if (chn->format & AFMT_16BIT)
987 else if (chn->format & AFMT_24BIT)
989 else if (chn->format & AFMT_32BIT)
1000 case SNDCTL_DSP_SETTRIGGER:
1003 rdch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER);
1004 if (*arg_i & PCM_ENABLE_INPUT)
1007 rdch->flags |= CHN_F_NOTRIGGER;
1012 wrch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER);
1013 if (*arg_i & PCM_ENABLE_OUTPUT)
1016 wrch->flags |= CHN_F_NOTRIGGER;
1021 case SNDCTL_DSP_GETTRIGGER:
1025 if (wrch->flags & CHN_F_TRIGGERED)
1026 *arg_i |= PCM_ENABLE_OUTPUT;
1031 if (rdch->flags & CHN_F_TRIGGERED)
1032 *arg_i |= PCM_ENABLE_INPUT;
1037 case SNDCTL_DSP_GETODELAY:
1039 struct snd_dbuf *b = wrch->bufhard;
1040 struct snd_dbuf *bs = wrch->bufsoft;
1043 /* XXX abusive DMA update: chn_wrupdate(wrch); */
1044 *arg_i = sndbuf_getready(b) + sndbuf_getready(bs);
1050 case SNDCTL_DSP_POST:
1053 wrch->flags &= ~CHN_F_NOTRIGGER;
1059 case SNDCTL_DSP_SETDUPLEX:
1061 * switch to full-duplex mode if card is in half-duplex
1062 * mode and is able to work in full-duplex mode
1064 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX))
1065 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX);
1068 case SNDCTL_DSP_MAPINBUF:
1069 case SNDCTL_DSP_MAPOUTBUF:
1070 case SNDCTL_DSP_SETSYNCRO:
1073 case SNDCTL_DSP_SUBDIVIDE:
1074 case SOUND_PCM_WRITE_FILTER:
1075 case SOUND_PCM_READ_FILTER:
1076 /* dunno what these do, don't sound important */
1079 DEB(kprintf("default ioctl fn 0x%08lx fail\n", cmd));
1083 relchns(i_dev, rdch, wrch, 0);
1087 static struct filterops dsp_read_filtops =
1088 { FILTEROP_ISFD, NULL, dsp_filter_detach, dsp_filter_read };
1089 static struct filterops dsp_write_filtops =
1090 { FILTEROP_ISFD, NULL, dsp_filter_detach, dsp_filter_write };
1093 dsp_kqfilter(struct dev_kqfilter_args *ap)
1095 struct knote *kn = ap->a_kn;
1096 struct klist *klist;
1097 struct cdev *i_dev = ap->a_head.a_dev;
1098 struct pcm_channel *wrch = NULL, *rdch = NULL;
1099 struct snd_dbuf *bs = NULL;
1101 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
1103 switch (kn->kn_filter) {
1106 kn->kn_fop = &dsp_read_filtops;
1107 kn->kn_hook = (caddr_t)rdch;
1114 kn->kn_fop = &dsp_write_filtops;
1115 kn->kn_hook = (caddr_t)wrch;
1121 ap->a_result = EOPNOTSUPP;
1125 if (ap->a_result == 0) {
1126 klist = &sndbuf_getkq(bs)->ki_note;
1127 knote_insert(klist, kn);
1130 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
1136 dsp_filter_detach(struct knote *kn)
1138 struct pcm_channel *ch = (struct pcm_channel *)kn->kn_hook;
1139 struct snd_dbuf *bs = ch->bufsoft;
1140 struct klist *klist;
1143 klist = &sndbuf_getkq(bs)->ki_note;
1144 knote_remove(klist, kn);
1149 dsp_filter_read(struct knote *kn, long hint)
1151 struct pcm_channel *rdch = (struct pcm_channel *)kn->kn_hook;
1152 struct thread *td = curthread;
1156 ready = chn_poll(rdch, 1, td);
1163 dsp_filter_write(struct knote *kn, long hint)
1165 struct pcm_channel *wrch = (struct pcm_channel *)kn->kn_hook;
1166 struct thread *td = curthread;
1170 ready = chn_poll(wrch, 1, td);
1177 dsp_mmap(struct dev_mmap_args *ap)
1179 struct cdev *i_dev = ap->a_head.a_dev;
1180 vm_offset_t offset = ap->a_offset;
1181 int nprot = ap->a_nprot;
1182 struct pcm_channel *wrch = NULL, *rdch = NULL, *c;
1184 if (nprot & PROT_EXEC)
1187 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
1190 * XXX the linux api uses the nprot to select read/write buffer
1191 * our vm system doesn't allow this, so force write buffer
1194 if (wrch && (nprot & PROT_WRITE)) {
1196 } else if (rdch && (nprot & PROT_READ)) {
1206 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
1210 if (offset >= sndbuf_getsize(c->bufsoft)) {
1211 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
1215 if (!(c->flags & CHN_F_MAPPED))
1216 c->flags |= CHN_F_MAPPED;
1218 ap->a_result = atop(vtophys(sndbuf_getbufofs(c->bufsoft, offset)));
1219 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
1225 * for i = 0 to channels of device N
1226 * if dspN.i isn't busy and in the right dir, create a dev_t and return it
1229 dsp_clone(struct dev_clone_args *ap)
1231 struct cdev *i_dev = ap->a_head.a_dev;
1233 struct snddev_info *pcm_dev;
1234 struct snddev_channel *pcm_chan;
1235 struct pcm_channel *c;
1239 pcm_dev = dsp_get_info(i_dev);
1241 if (pcm_dev == NULL)
1244 dir = ap->a_mode & FWRITE ? PCMDIR_PLAY : PCMDIR_REC;
1247 SLIST_FOREACH(pcm_chan, &pcm_dev->channels, link) {
1248 c = pcm_chan->channel;
1250 pdev = pcm_chan->dsp_dev;
1253 * Make sure that the channel has not been assigned
1254 * to a device yet (and vice versa).
1255 * The direction has to match and the channel may not
1257 * dsp_open will use exactly this channel number to
1258 * avoid (possible?) races between clone and open.
1260 if (pdev == NULL && c->direction == dir &&
1261 !(c->flags & CHN_F_BUSY)) {
1264 pcm_chan->dsp_dev = make_only_dev(&dsp_ops,
1265 PCMMKMINOR(PCMUNIT(i_dev), pcm_chan->chan_num),
1266 UID_ROOT, GID_WHEEL,
1270 pcm_chan->chan_num);
1271 pcm_unlock(pcm_dev);
1273 ap->a_dev = pcm_chan->dsp_dev;
1279 if ((pdev != NULL) && (pdev->si_drv1 == NULL) && (pdev->si_drv2 == NULL)) {
1280 kprintf("%s: dangling device\n", devtoname(pdev));
1285 /* no channel available, create vchannel */
1286 if (dir == PCMDIR_PLAY &&
1287 pcm_dev->vchancount > 0 &&
1288 pcm_dev->vchancount < snd_maxautovchans &&
1289 pcm_dev->devcount < PCMMAXCHAN) {
1290 err = pcm_setvchans(pcm_dev, pcm_dev->vchancount + 1);
1292 goto retry_chnalloc;
1294 * If we can't use vchans, because the main output is
1295 * blocked for something else, we should not return
1296 * any vchan create error, but the more descriptive
1298 * After all, the user didn't ask us to clone, but
1299 * only opened /dev/dsp.