2 * Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
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 1.15.2.13 2002/08/30 13:53:03 orion Exp $
27 * $DragonFly: src/sys/dev/sound/pcm/dsp.c,v 1.3 2003/06/23 17:55:34 dillon Exp $
30 #include <sys/param.h>
31 #include <sys/queue.h>
33 #include <dev/sound/pcm/sound.h>
35 SND_DECLARE_FILE("$DragonFly: src/sys/dev/sound/pcm/dsp.c,v 1.3 2003/06/23 17:55:34 dillon Exp $");
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_poll_t dsp_poll;
45 static d_mmap_t dsp_mmap;
47 static struct cdevsw dsp_cdevsw = {
49 /* close */ dsp_close,
51 /* write */ dsp_write,
52 /* ioctl */ dsp_ioctl,
55 /* strategy */ nostrategy,
57 /* maj */ SND_CDEV_MAJOR,
64 static eventhandler_tag dsp_ehtag;
67 static struct snddev_info *
68 dsp_get_info(dev_t dev)
70 struct snddev_info *d;
74 if (unit >= devclass_get_maxunit(pcm_devclass))
76 d = devclass_get_softc(pcm_devclass, unit);
82 dsp_get_flags(dev_t dev)
88 if (unit >= devclass_get_maxunit(pcm_devclass))
90 bdev = devclass_get_device(pcm_devclass, unit);
92 return pcm_getflags(bdev);
96 dsp_set_flags(dev_t dev, u_int32_t flags)
102 if (unit >= devclass_get_maxunit(pcm_devclass))
104 bdev = devclass_get_device(pcm_devclass, unit);
106 pcm_setflags(bdev, flags);
110 * return the channels channels associated with an open device instance.
111 * set the priority if the device is simplex and one direction (only) is
113 * lock channels specified.
116 getchns(dev_t dev, struct pcm_channel **rdch, struct pcm_channel **wrch, u_int32_t prio)
118 struct snddev_info *d;
121 flags = dsp_get_flags(dev);
122 d = dsp_get_info(dev);
125 KASSERT((flags & SD_F_PRIO_SET) != SD_F_PRIO_SET, \
126 ("getchns: read and write both prioritised"));
128 if ((flags & SD_F_PRIO_SET) == 0 && (prio != (SD_F_PRIO_RD | SD_F_PRIO_WR))) {
129 flags |= prio & (SD_F_PRIO_RD | SD_F_PRIO_WR);
130 dsp_set_flags(dev, flags);
133 *rdch = dev->si_drv1;
134 *wrch = dev->si_drv2;
135 if ((flags & SD_F_SIMPLEX) && (flags & SD_F_PRIO_SET)) {
137 if (*rdch && flags & SD_F_PRIO_WR) {
139 *rdch = pcm_getfakechan(d);
140 } else if (*wrch && flags & SD_F_PRIO_RD) {
142 *wrch = pcm_getfakechan(d);
146 pcm_getfakechan(d)->flags |= CHN_F_BUSY;
150 if (*rdch && *rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD))
152 if (*wrch && *wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR))
158 /* unlock specified channels */
160 relchns(dev_t dev, struct pcm_channel *rdch, struct pcm_channel *wrch, u_int32_t prio)
162 struct snddev_info *d;
164 d = dsp_get_info(dev);
165 if (wrch && wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR))
167 if (rdch && rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD))
175 dsp_open(dev_t i_dev, int flags, int mode, struct thread *td)
177 struct pcm_channel *rdch, *wrch;
178 struct snddev_info *d;
182 struct proc *p = td->td_proc;
187 d = dsp_get_info(i_dev);
188 devtype = PCMDEV(i_dev);
190 /* decide default format */
204 case SND_DEV_NORESET:
217 panic("impossible devtype %d", devtype);
220 /* lock snddev so nobody else can monkey with it */
223 rdch = i_dev->si_drv1;
224 wrch = i_dev->si_drv2;
226 if ((dsp_get_flags(i_dev) & SD_F_SIMPLEX) && (rdch || wrch)) {
227 /* simplex device, already open, exit */
233 if (((flags & FREAD) && rdch) || ((flags & FWRITE) && wrch)) {
234 /* device already open in one or both directions */
240 /* if we get here, the open request is valid */
243 if (devtype == SND_DEV_DSPREC)
244 rdch = pcm_chnalloc(d, PCMDIR_REC, p->p_pid, PCMCHAN(i_dev));
246 rdch = pcm_chnalloc(d, PCMDIR_REC, p->p_pid, -1);
248 /* no channel available, exit */
253 /* got a channel, already locked for us */
256 if (flags & FWRITE) {
258 wrch = pcm_chnalloc(d, PCMDIR_PLAY, p->p_pid, -1);
260 /* no channel available */
261 if (rdch && (flags & FREAD)) {
262 /* just opened a read channel, release it */
263 pcm_chnrelease(rdch);
270 /* got a channel, already locked for us */
273 i_dev->si_drv1 = rdch;
274 i_dev->si_drv2 = wrch;
276 /* finished with snddev, new channels still locked */
278 /* bump refcounts, reset and unlock any channels that we just opened */
280 if (chn_reset(rdch, fmt)) {
282 pcm_chnrelease(rdch);
283 if (wrch && (flags & FWRITE))
284 pcm_chnrelease(wrch);
289 if (flags & O_NONBLOCK)
290 rdch->flags |= CHN_F_NBIO;
294 if (flags & FWRITE) {
295 if (chn_reset(wrch, fmt)) {
297 pcm_chnrelease(wrch);
300 pcm_chnref(rdch, -1);
301 pcm_chnrelease(rdch);
308 if (flags & O_NONBLOCK)
309 wrch->flags |= CHN_F_NBIO;
318 dsp_close(dev_t i_dev, int flags, int mode, struct thread *td)
320 struct pcm_channel *rdch, *wrch;
321 struct snddev_info *d;
326 d = dsp_get_info(i_dev);
328 rdch = i_dev->si_drv1;
329 wrch = i_dev->si_drv2;
333 /* decrement refcount for each channel, exit if nonzero */
336 if (pcm_chnref(rdch, -1) > 0) {
343 if (pcm_chnref(wrch, -1) > 0) {
354 /* both refcounts are zero, abort and release */
356 if (pcm_getfakechan(d))
357 pcm_getfakechan(d)->flags = 0;
359 i_dev->si_drv1 = NULL;
360 i_dev->si_drv2 = NULL;
362 dsp_set_flags(i_dev, dsp_get_flags(i_dev) & ~SD_F_TRANSIENT);
366 chn_abort(rdch); /* won't sleep */
367 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD);
369 pcm_chnrelease(rdch);
372 chn_flush(wrch); /* may sleep */
373 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD);
375 pcm_chnrelease(wrch);
383 dsp_read(dev_t i_dev, struct uio *buf, int flag)
385 struct pcm_channel *rdch, *wrch;
390 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD);
392 KASSERT(rdch, ("dsp_read: nonexistant channel"));
393 KASSERT(rdch->flags & CHN_F_BUSY, ("dsp_read: nonbusy channel"));
395 if (rdch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) {
396 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD);
400 if (!(rdch->flags & CHN_F_RUNNING))
401 rdch->flags |= CHN_F_RUNNING;
402 ret = chn_read(rdch, buf);
403 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD);
410 dsp_write(dev_t i_dev, struct uio *buf, int flag)
412 struct pcm_channel *rdch, *wrch;
417 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_WR);
419 KASSERT(wrch, ("dsp_write: nonexistant channel"));
420 KASSERT(wrch->flags & CHN_F_BUSY, ("dsp_write: nonbusy channel"));
422 if (wrch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) {
423 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR);
427 if (!(wrch->flags & CHN_F_RUNNING))
428 wrch->flags |= CHN_F_RUNNING;
429 ret = chn_write(wrch, buf);
430 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR);
437 dsp_ioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct thread *td)
439 struct pcm_channel *wrch, *rdch;
440 struct snddev_info *d;
443 int ret = 0, *arg_i = (int *)arg, tmp;
446 * this is an evil hack to allow broken apps to perform mixer ioctls
450 if (IOCGROUP(cmd) == 'M') {
453 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(PCMUNIT(i_dev), SND_DEV_CTL, 0));
454 return mixer_ioctl(pdev, cmd, arg, mode, td);
458 d = dsp_get_info(i_dev);
459 getchns(i_dev, &rdch, &wrch, 0);
462 if (wrch && (wrch->flags & CHN_F_DEAD))
464 if (rdch && (rdch->flags & CHN_F_DEAD))
467 relchns(i_dev, rdch, wrch, 0);
479 * we start with the new ioctl interface.
481 case AIONWRITE: /* how many bytes can write ? */
483 if (wrch && wrch->bufhard.dl)
484 while (chn_wrfeed(wrch) == 0);
486 *arg_i = wrch? sndbuf_getfree(wrch->bufsoft) : 0;
489 case AIOSSIZE: /* set the current blocksize */
491 struct snd_size *p = (struct snd_size *)arg;
497 chn_setblocksize(wrch, 2, p->play_size);
498 p->play_size = sndbuf_getblksz(wrch->bufsoft);
503 chn_setblocksize(rdch, 2, p->rec_size);
504 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
509 case AIOGSIZE: /* get the current blocksize */
511 struct snd_size *p = (struct snd_size *)arg;
514 p->play_size = sndbuf_getblksz(wrch->bufsoft);
516 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
522 snd_chan_param *p = (snd_chan_param *)arg;
526 chn_setformat(wrch, p->play_format);
527 chn_setspeed(wrch, p->play_rate);
532 chn_setformat(rdch, p->rec_format);
533 chn_setspeed(rdch, p->rec_rate);
541 snd_chan_param *p = (snd_chan_param *)arg;
543 p->play_rate = wrch? wrch->speed : 0;
544 p->rec_rate = rdch? rdch->speed : 0;
545 p->play_format = wrch? wrch->format : 0;
546 p->rec_format = rdch? rdch->format : 0;
550 case AIOGCAP: /* get capabilities */
552 snd_capabilities *p = (snd_capabilities *)arg;
553 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL;
558 rcaps = chn_getcaps(rdch);
562 pcaps = chn_getcaps(wrch);
564 p->rate_min = max(rcaps? rcaps->minspeed : 0,
565 pcaps? pcaps->minspeed : 0);
566 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000,
567 pcaps? pcaps->maxspeed : 1000000);
568 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000,
569 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000);
570 /* XXX bad on sb16 */
571 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) &
572 (wrch? chn_getformats(wrch) : 0xffffffff);
574 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX;
575 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(PCMUNIT(i_dev), SND_DEV_CTL, 0));
576 p->mixers = 1; /* default: one mixer */
577 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0;
578 p->left = p->right = 100;
587 if (*arg_i == AIOSYNC_PLAY && wrch)
588 *arg_i = chn_abort(wrch);
589 else if (*arg_i == AIOSYNC_CAPTURE && rdch)
590 *arg_i = chn_abort(rdch);
592 printf("AIOSTOP: bad channel 0x%x\n", *arg_i);
598 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
599 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos);
603 * here follow the standard ioctls (filio.h etc.)
605 case FIONREAD: /* get # bytes to read */
606 /* if (rdch && rdch->bufhard.dl)
607 while (chn_rdfeed(rdch) == 0);
608 */ *arg_i = rdch? sndbuf_getready(rdch->bufsoft) : 0;
611 case FIOASYNC: /*set/clear async i/o */
612 DEB( printf("FIOASYNC\n") ; )
615 case SNDCTL_DSP_NONBLOCK:
616 case FIONBIO: /* set/clear non-blocking i/o */
618 rdch->flags &= ~CHN_F_NBIO;
620 wrch->flags &= ~CHN_F_NBIO;
623 rdch->flags |= CHN_F_NBIO;
625 wrch->flags |= CHN_F_NBIO;
630 * Finally, here is the linux-compatible ioctl interface
632 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int)
633 case THE_REAL_SNDCTL_DSP_GETBLKSIZE:
634 case SNDCTL_DSP_GETBLKSIZE:
636 *arg_i = sndbuf_getblksz(wrch->bufsoft);
638 *arg_i = sndbuf_getblksz(rdch->bufsoft);
643 case SNDCTL_DSP_SETBLKSIZE:
644 RANGE(*arg_i, 16, 65536);
647 chn_setblocksize(wrch, 2, *arg_i);
652 chn_setblocksize(rdch, 2, *arg_i);
657 case SNDCTL_DSP_RESET:
658 DEB(printf("dsp reset\n"));
665 case SNDCTL_DSP_SYNC:
666 DEB(printf("dsp sync\n"));
667 /* chn_sync may sleep */
670 chn_sync(wrch, sndbuf_getsize(wrch->bufsoft) - 4);
675 case SNDCTL_DSP_SPEED:
676 /* chn_setspeed may sleep */
680 ret = chn_setspeed(wrch, *arg_i);
684 if (rdch && ret == 0) {
686 ret = chn_setspeed(rdch, *arg_i);
694 case SOUND_PCM_READ_RATE:
695 *arg_i = wrch? wrch->speed : rdch->speed;
698 case SNDCTL_DSP_STEREO:
700 *arg_i = (*arg_i)? AFMT_STEREO : 0;
703 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i);
704 tmp = (wrch->format & AFMT_STEREO)? 1 : 0;
707 if (rdch && ret == 0) {
709 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i);
711 tmp = (rdch->format & AFMT_STEREO)? 1 : 0;
717 case SOUND_PCM_WRITE_CHANNELS:
718 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */
721 *arg_i = (*arg_i != 1)? AFMT_STEREO : 0;
724 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i);
725 tmp = (wrch->format & AFMT_STEREO)? 2 : 1;
728 if (rdch && ret == 0) {
730 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i);
732 tmp = (rdch->format & AFMT_STEREO)? 2 : 1;
737 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1;
741 case SOUND_PCM_READ_CHANNELS:
742 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1;
745 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */
746 *arg_i = wrch? chn_getformats(wrch) : chn_getformats(rdch);
749 case SNDCTL_DSP_SETFMT: /* sets _one_ format */
751 if ((*arg_i != AFMT_QUERY)) {
755 ret = chn_setformat(wrch, (*arg_i) | (wrch->format & AFMT_STEREO));
756 tmp = wrch->format & ~AFMT_STEREO;
759 if (rdch && ret == 0) {
761 ret = chn_setformat(rdch, (*arg_i) | (rdch->format & AFMT_STEREO));
763 tmp = rdch->format & ~AFMT_STEREO;
768 *arg_i = (wrch? wrch->format : rdch->format) & ~AFMT_STEREO;
771 case SNDCTL_DSP_SETFRAGMENT:
773 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg));
775 u_int32_t fragln = (*arg_i) & 0x0000ffff;
776 u_int32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16;
779 RANGE(fragln, 4, 16);
780 fragsz = 1 << fragln;
783 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
788 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE)
789 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
791 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz));
794 ret = chn_setblocksize(rdch, maxfrags, fragsz);
795 maxfrags = sndbuf_getblkcnt(rdch->bufsoft);
796 fragsz = sndbuf_getblksz(rdch->bufsoft);
799 if (wrch && ret == 0) {
801 ret = chn_setblocksize(wrch, maxfrags, fragsz);
802 maxfrags = sndbuf_getblkcnt(wrch->bufsoft);
803 fragsz = sndbuf_getblksz(wrch->bufsoft);
812 *arg_i = (maxfrags << 16) | fragln;
816 case SNDCTL_DSP_GETISPACE:
817 /* return the size of data available in the input queue */
819 audio_buf_info *a = (audio_buf_info *)arg;
821 struct snd_dbuf *bs = rdch->bufsoft;
824 a->bytes = sndbuf_getready(bs);
825 a->fragments = a->bytes / sndbuf_getblksz(bs);
826 a->fragstotal = sndbuf_getblkcnt(bs);
827 a->fragsize = sndbuf_getblksz(bs);
833 case SNDCTL_DSP_GETOSPACE:
834 /* return space available in the output queue */
836 audio_buf_info *a = (audio_buf_info *)arg;
838 struct snd_dbuf *bs = wrch->bufsoft;
842 a->bytes = sndbuf_getfree(bs);
843 a->fragments = a->bytes / sndbuf_getblksz(bs);
844 a->fragstotal = sndbuf_getblkcnt(bs);
845 a->fragsize = sndbuf_getblksz(bs);
851 case SNDCTL_DSP_GETIPTR:
853 count_info *a = (count_info *)arg;
855 struct snd_dbuf *bs = rdch->bufsoft;
859 a->bytes = sndbuf_gettotal(bs);
860 a->blocks = sndbuf_getblocks(bs) - rdch->blocks;
861 a->ptr = sndbuf_getreadyptr(bs);
862 rdch->blocks = sndbuf_getblocks(bs);
869 case SNDCTL_DSP_GETOPTR:
871 count_info *a = (count_info *)arg;
873 struct snd_dbuf *bs = wrch->bufsoft;
877 a->bytes = sndbuf_gettotal(bs);
878 a->blocks = sndbuf_getblocks(bs) - wrch->blocks;
879 a->ptr = sndbuf_getreadyptr(bs);
880 wrch->blocks = sndbuf_getblocks(bs);
887 case SNDCTL_DSP_GETCAPS:
888 *arg_i = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER;
889 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX))
890 *arg_i |= DSP_CAP_DUPLEX;
893 case SOUND_PCM_READ_BITS:
894 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_16BIT)? 16 : 8;
897 case SNDCTL_DSP_SETTRIGGER:
900 rdch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER);
901 if (*arg_i & PCM_ENABLE_INPUT)
904 rdch->flags |= CHN_F_NOTRIGGER;
909 wrch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER);
910 if (*arg_i & PCM_ENABLE_OUTPUT)
913 wrch->flags |= CHN_F_NOTRIGGER;
918 case SNDCTL_DSP_GETTRIGGER:
920 if (wrch && wrch->flags & CHN_F_TRIGGERED)
921 *arg_i |= PCM_ENABLE_OUTPUT;
922 if (rdch && rdch->flags & CHN_F_TRIGGERED)
923 *arg_i |= PCM_ENABLE_INPUT;
926 case SNDCTL_DSP_GETODELAY:
928 struct snd_dbuf *b = wrch->bufhard;
929 struct snd_dbuf *bs = wrch->bufsoft;
933 *arg_i = sndbuf_getready(b) + sndbuf_getready(bs);
939 case SNDCTL_DSP_POST:
942 wrch->flags &= ~CHN_F_NOTRIGGER;
948 case SNDCTL_DSP_MAPINBUF:
949 case SNDCTL_DSP_MAPOUTBUF:
950 case SNDCTL_DSP_SETSYNCRO:
953 case SNDCTL_DSP_SUBDIVIDE:
954 case SOUND_PCM_WRITE_FILTER:
955 case SOUND_PCM_READ_FILTER:
956 /* dunno what these do, don't sound important */
958 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd));
962 relchns(i_dev, rdch, wrch, 0);
968 dsp_poll(dev_t i_dev, int events, struct thread *td)
970 struct pcm_channel *wrch = NULL, *rdch = NULL;
976 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
979 e = (events & (POLLOUT | POLLWRNORM));
981 ret |= chn_poll(wrch, e, td->td_proc);
984 e = (events & (POLLIN | POLLRDNORM));
986 ret |= chn_poll(rdch, e, td->td_proc);
988 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
995 dsp_mmap(dev_t i_dev, vm_offset_t offset, int nprot)
997 struct pcm_channel *wrch = NULL, *rdch = NULL, *c;
1001 if (nprot & PROT_EXEC)
1005 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
1008 * XXX the linux api uses the nprot to select read/write buffer
1009 * our vm system doesn't allow this, so force write buffer
1012 if (wrch && (nprot & PROT_WRITE)) {
1014 } else if (rdch && (nprot & PROT_READ)) {
1025 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
1030 if (offset >= sndbuf_getsize(c->bufsoft)) {
1031 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
1036 if (!(c->flags & CHN_F_MAPPED))
1037 c->flags |= CHN_F_MAPPED;
1039 ret = atop(vtophys(sndbuf_getbufofs(c->bufsoft, offset)));
1040 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
1047 dsp_register(int unit, int channel)
1049 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSP, channel),
1050 UID_ROOT, GID_WHEEL, 0666, "dsp%d.%d", unit, channel);
1051 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSP16, channel),
1052 UID_ROOT, GID_WHEEL, 0666, "dspW%d.%d", unit, channel);
1053 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_AUDIO, channel),
1054 UID_ROOT, GID_WHEEL, 0666, "audio%d.%d", unit, channel);
1060 dsp_registerrec(int unit, int channel)
1062 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSPREC, channel),
1063 UID_ROOT, GID_WHEEL, 0666, "dspr%d.%d", unit, channel);
1069 dsp_unregister(int unit, int channel)
1073 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSP, channel));
1075 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSP16, channel));
1077 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_AUDIO, channel));
1084 dsp_unregisterrec(int unit, int channel)
1088 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSPREC, channel));
1096 dsp_clone(void *arg, char *name, int namelen, dev_t *dev)
1099 int i, cont, unit, devtype;
1100 int devtypes[3] = {SND_DEV_DSP, SND_DEV_DSP16, SND_DEV_AUDIO};
1101 char *devnames[3] = {"dsp", "dspW", "audio"};
1105 if (pcm_devclass == NULL)
1110 for (i = 0; (i < 3) && (unit == -1); i++) {
1111 devtype = devtypes[i];
1112 if (strcmp(name, devnames[i]) == 0) {
1115 if (dev_stdclone(name, NULL, devnames[i], &unit) != 1)
1119 if (unit == -1 || unit >= devclass_get_maxunit(pcm_devclass))
1123 for (i = 0; cont; i++) {
1124 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, devtype, i));
1125 if (pdev->si_flags & SI_NAMED) {
1126 if ((pdev->si_drv1 == NULL) && (pdev->si_drv2 == NULL)) {
1137 dsp_sysinit(void *p)
1139 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000);
1143 dsp_sysuninit(void *p)
1145 if (dsp_ehtag != NULL)
1146 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag);
1149 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL);
1150 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL);