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
27 #include <sys/param.h>
28 #include <sys/queue.h>
30 #include <dev/sound/pcm/sound.h>
32 SND_DECLARE_FILE("$FreeBSD$");
36 static d_open_t dsp_open;
37 static d_close_t dsp_close;
38 static d_read_t dsp_read;
39 static d_write_t dsp_write;
40 static d_ioctl_t dsp_ioctl;
41 static d_poll_t dsp_poll;
42 static d_mmap_t dsp_mmap;
44 static struct cdevsw dsp_cdevsw = {
46 /* close */ dsp_close,
48 /* write */ dsp_write,
49 /* ioctl */ dsp_ioctl,
52 /* strategy */ nostrategy,
54 /* maj */ SND_CDEV_MAJOR,
61 static eventhandler_tag dsp_ehtag;
64 static struct snddev_info *
65 dsp_get_info(dev_t dev)
67 struct snddev_info *d;
71 if (unit >= devclass_get_maxunit(pcm_devclass))
73 d = devclass_get_softc(pcm_devclass, unit);
79 dsp_get_flags(dev_t dev)
85 if (unit >= devclass_get_maxunit(pcm_devclass))
87 bdev = devclass_get_device(pcm_devclass, unit);
89 return pcm_getflags(bdev);
93 dsp_set_flags(dev_t dev, u_int32_t flags)
99 if (unit >= devclass_get_maxunit(pcm_devclass))
101 bdev = devclass_get_device(pcm_devclass, unit);
103 pcm_setflags(bdev, flags);
107 * return the channels channels associated with an open device instance.
108 * set the priority if the device is simplex and one direction (only) is
110 * lock channels specified.
113 getchns(dev_t dev, struct pcm_channel **rdch, struct pcm_channel **wrch, u_int32_t prio)
115 struct snddev_info *d;
118 flags = dsp_get_flags(dev);
119 d = dsp_get_info(dev);
122 KASSERT((flags & SD_F_PRIO_SET) != SD_F_PRIO_SET, \
123 ("getchns: read and write both prioritised"));
125 if ((flags & SD_F_PRIO_SET) == 0 && (prio != (SD_F_PRIO_RD | SD_F_PRIO_WR))) {
126 flags |= prio & (SD_F_PRIO_RD | SD_F_PRIO_WR);
127 dsp_set_flags(dev, flags);
130 *rdch = dev->si_drv1;
131 *wrch = dev->si_drv2;
132 if ((flags & SD_F_SIMPLEX) && (flags & SD_F_PRIO_SET)) {
134 if (*rdch && flags & SD_F_PRIO_WR) {
136 *rdch = pcm_getfakechan(d);
137 } else if (*wrch && flags & SD_F_PRIO_RD) {
139 *wrch = pcm_getfakechan(d);
143 pcm_getfakechan(d)->flags |= CHN_F_BUSY;
147 if (*rdch && *rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD))
149 if (*wrch && *wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR))
155 /* unlock specified channels */
157 relchns(dev_t dev, struct pcm_channel *rdch, struct pcm_channel *wrch, u_int32_t prio)
159 struct snddev_info *d;
161 d = dsp_get_info(dev);
162 if (wrch && wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR))
164 if (rdch && rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD))
172 dsp_open(dev_t i_dev, int flags, int mode, struct thread *td)
174 struct pcm_channel *rdch, *wrch;
175 struct snddev_info *d;
181 d = dsp_get_info(i_dev);
182 devtype = PCMDEV(i_dev);
184 /* decide default format */
198 case SND_DEV_NORESET:
211 panic("impossible devtype %d", devtype);
214 /* lock snddev so nobody else can monkey with it */
217 rdch = i_dev->si_drv1;
218 wrch = i_dev->si_drv2;
220 if ((dsp_get_flags(i_dev) & SD_F_SIMPLEX) && (rdch || wrch)) {
221 /* simplex device, already open, exit */
227 if (((flags & FREAD) && rdch) || ((flags & FWRITE) && wrch)) {
228 /* device already open in one or both directions */
234 /* if we get here, the open request is valid */
237 if (devtype == SND_DEV_DSPREC)
238 rdch = pcm_chnalloc(d, PCMDIR_REC, td->td_proc->p_pid, PCMCHAN(i_dev));
240 rdch = pcm_chnalloc(d, PCMDIR_REC, td->td_proc->p_pid, -1);
242 /* no channel available, exit */
247 /* got a channel, already locked for us */
250 if (flags & FWRITE) {
252 wrch = pcm_chnalloc(d, PCMDIR_PLAY, td->td_proc->p_pid, -1);
254 /* no channel available */
256 /* just opened a read channel, release it */
257 pcm_chnrelease(rdch);
264 /* got a channel, already locked for us */
267 i_dev->si_drv1 = rdch;
268 i_dev->si_drv2 = wrch;
270 /* finished with snddev, new channels still locked */
272 /* bump refcounts, reset and unlock any channels that we just opened */
274 if (chn_reset(rdch, fmt)) {
276 pcm_chnrelease(rdch);
277 if (wrch && (flags & FWRITE))
278 pcm_chnrelease(wrch);
283 if (flags & O_NONBLOCK)
284 rdch->flags |= CHN_F_NBIO;
288 if (flags & FWRITE) {
289 if (chn_reset(wrch, fmt)) {
291 pcm_chnrelease(wrch);
294 pcm_chnref(rdch, -1);
295 pcm_chnrelease(rdch);
302 if (flags & O_NONBLOCK)
303 wrch->flags |= CHN_F_NBIO;
312 dsp_close(dev_t i_dev, int flags, int mode, struct thread *td)
314 struct pcm_channel *rdch, *wrch;
315 struct snddev_info *d;
320 d = dsp_get_info(i_dev);
322 rdch = i_dev->si_drv1;
323 wrch = i_dev->si_drv2;
327 /* decrement refcount for each channel, exit if nonzero */
330 if (pcm_chnref(rdch, -1) > 0) {
337 if (pcm_chnref(wrch, -1) > 0) {
348 /* both refcounts are zero, abort and release */
350 if (pcm_getfakechan(d))
351 pcm_getfakechan(d)->flags = 0;
353 i_dev->si_drv1 = NULL;
354 i_dev->si_drv2 = NULL;
356 dsp_set_flags(i_dev, dsp_get_flags(i_dev) & ~SD_F_TRANSIENT);
360 chn_abort(rdch); /* won't sleep */
361 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD);
363 pcm_chnrelease(rdch);
366 chn_flush(wrch); /* may sleep */
367 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD);
369 pcm_chnrelease(wrch);
377 dsp_read(dev_t i_dev, struct uio *buf, int flag)
379 struct pcm_channel *rdch, *wrch;
384 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD);
386 KASSERT(rdch, ("dsp_read: nonexistant channel"));
387 KASSERT(rdch->flags & CHN_F_BUSY, ("dsp_read: nonbusy channel"));
389 if (rdch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) {
390 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD);
394 if (!(rdch->flags & CHN_F_RUNNING))
395 rdch->flags |= CHN_F_RUNNING;
396 ret = chn_read(rdch, buf);
397 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD);
404 dsp_write(dev_t i_dev, struct uio *buf, int flag)
406 struct pcm_channel *rdch, *wrch;
411 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_WR);
413 KASSERT(wrch, ("dsp_write: nonexistant channel"));
414 KASSERT(wrch->flags & CHN_F_BUSY, ("dsp_write: nonbusy channel"));
416 if (wrch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) {
417 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR);
421 if (!(wrch->flags & CHN_F_RUNNING))
422 wrch->flags |= CHN_F_RUNNING;
423 ret = chn_write(wrch, buf);
424 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR);
431 dsp_ioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct thread *td)
433 struct pcm_channel *wrch, *rdch;
434 struct snddev_info *d;
437 int ret = 0, *arg_i = (int *)arg, tmp;
440 * this is an evil hack to allow broken apps to perform mixer ioctls
444 if (IOCGROUP(cmd) == 'M') {
447 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(PCMUNIT(i_dev), SND_DEV_CTL, 0));
448 return mixer_ioctl(pdev, cmd, arg, mode, td);
452 d = dsp_get_info(i_dev);
453 getchns(i_dev, &rdch, &wrch, 0);
456 if (wrch && (wrch->flags & CHN_F_DEAD))
458 if (rdch && (rdch->flags & CHN_F_DEAD))
461 relchns(i_dev, rdch, wrch, 0);
473 * we start with the new ioctl interface.
475 case AIONWRITE: /* how many bytes can write ? */
477 if (wrch && wrch->bufhard.dl)
478 while (chn_wrfeed(wrch) == 0);
480 *arg_i = wrch? sndbuf_getfree(wrch->bufsoft) : 0;
483 case AIOSSIZE: /* set the current blocksize */
485 struct snd_size *p = (struct snd_size *)arg;
491 chn_setblocksize(wrch, 2, p->play_size);
492 p->play_size = sndbuf_getblksz(wrch->bufsoft);
497 chn_setblocksize(rdch, 2, p->rec_size);
498 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
503 case AIOGSIZE: /* get the current blocksize */
505 struct snd_size *p = (struct snd_size *)arg;
508 p->play_size = sndbuf_getblksz(wrch->bufsoft);
510 p->rec_size = sndbuf_getblksz(rdch->bufsoft);
516 snd_chan_param *p = (snd_chan_param *)arg;
520 chn_setformat(wrch, p->play_format);
521 chn_setspeed(wrch, p->play_rate);
526 chn_setformat(rdch, p->rec_format);
527 chn_setspeed(rdch, p->rec_rate);
535 snd_chan_param *p = (snd_chan_param *)arg;
537 p->play_rate = wrch? wrch->speed : 0;
538 p->rec_rate = rdch? rdch->speed : 0;
539 p->play_format = wrch? wrch->format : 0;
540 p->rec_format = rdch? rdch->format : 0;
544 case AIOGCAP: /* get capabilities */
546 snd_capabilities *p = (snd_capabilities *)arg;
547 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL;
552 rcaps = chn_getcaps(rdch);
556 pcaps = chn_getcaps(wrch);
558 p->rate_min = max(rcaps? rcaps->minspeed : 0,
559 pcaps? pcaps->minspeed : 0);
560 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000,
561 pcaps? pcaps->maxspeed : 1000000);
562 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000,
563 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000);
564 /* XXX bad on sb16 */
565 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) &
566 (wrch? chn_getformats(wrch) : 0xffffffff);
568 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX;
569 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(PCMUNIT(i_dev), SND_DEV_CTL, 0));
570 p->mixers = 1; /* default: one mixer */
571 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0;
572 p->left = p->right = 100;
581 if (*arg_i == AIOSYNC_PLAY && wrch)
582 *arg_i = chn_abort(wrch);
583 else if (*arg_i == AIOSYNC_CAPTURE && rdch)
584 *arg_i = chn_abort(rdch);
586 printf("AIOSTOP: bad channel 0x%x\n", *arg_i);
592 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
593 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos);
597 * here follow the standard ioctls (filio.h etc.)
599 case FIONREAD: /* get # bytes to read */
600 /* if (rdch && rdch->bufhard.dl)
601 while (chn_rdfeed(rdch) == 0);
602 */ *arg_i = rdch? sndbuf_getready(rdch->bufsoft) : 0;
605 case FIOASYNC: /*set/clear async i/o */
606 DEB( printf("FIOASYNC\n") ; )
609 case SNDCTL_DSP_NONBLOCK:
610 case FIONBIO: /* set/clear non-blocking i/o */
612 rdch->flags &= ~CHN_F_NBIO;
614 wrch->flags &= ~CHN_F_NBIO;
617 rdch->flags |= CHN_F_NBIO;
619 wrch->flags |= CHN_F_NBIO;
624 * Finally, here is the linux-compatible ioctl interface
626 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int)
627 case THE_REAL_SNDCTL_DSP_GETBLKSIZE:
628 case SNDCTL_DSP_GETBLKSIZE:
630 *arg_i = sndbuf_getblksz(wrch->bufsoft);
632 *arg_i = sndbuf_getblksz(rdch->bufsoft);
637 case SNDCTL_DSP_SETBLKSIZE:
638 RANGE(*arg_i, 16, 65536);
641 chn_setblocksize(wrch, 2, *arg_i);
646 chn_setblocksize(rdch, 2, *arg_i);
651 case SNDCTL_DSP_RESET:
652 DEB(printf("dsp reset\n"));
659 case SNDCTL_DSP_SYNC:
660 DEB(printf("dsp sync\n"));
661 /* chn_sync may sleep */
664 chn_sync(wrch, sndbuf_getsize(wrch->bufsoft) - 4);
669 case SNDCTL_DSP_SPEED:
670 /* chn_setspeed may sleep */
674 ret = chn_setspeed(wrch, *arg_i);
678 if (rdch && ret == 0) {
680 ret = chn_setspeed(rdch, *arg_i);
688 case SOUND_PCM_READ_RATE:
689 *arg_i = wrch? wrch->speed : rdch->speed;
692 case SNDCTL_DSP_STEREO:
694 *arg_i = (*arg_i)? AFMT_STEREO : 0;
697 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i);
698 tmp = (wrch->format & AFMT_STEREO)? 1 : 0;
701 if (rdch && ret == 0) {
703 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i);
705 tmp = (rdch->format & AFMT_STEREO)? 1 : 0;
711 case SOUND_PCM_WRITE_CHANNELS:
712 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */
715 *arg_i = (*arg_i != 1)? AFMT_STEREO : 0;
718 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i);
719 tmp = (wrch->format & AFMT_STEREO)? 2 : 1;
722 if (rdch && ret == 0) {
724 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i);
726 tmp = (rdch->format & AFMT_STEREO)? 2 : 1;
731 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1;
735 case SOUND_PCM_READ_CHANNELS:
736 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1;
739 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */
740 *arg_i = wrch? chn_getformats(wrch) : chn_getformats(rdch);
743 case SNDCTL_DSP_SETFMT: /* sets _one_ format */
745 if ((*arg_i != AFMT_QUERY)) {
749 ret = chn_setformat(wrch, (*arg_i) | (wrch->format & AFMT_STEREO));
750 tmp = wrch->format & ~AFMT_STEREO;
753 if (rdch && ret == 0) {
755 ret = chn_setformat(rdch, (*arg_i) | (rdch->format & AFMT_STEREO));
757 tmp = rdch->format & ~AFMT_STEREO;
762 *arg_i = (wrch? wrch->format : rdch->format) & ~AFMT_STEREO;
765 case SNDCTL_DSP_SETFRAGMENT:
767 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg));
769 u_int32_t fragln = (*arg_i) & 0x0000ffff;
770 u_int32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16;
773 RANGE(fragln, 4, 16);
774 fragsz = 1 << fragln;
777 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
782 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE)
783 maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
785 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz));
788 ret = chn_setblocksize(rdch, maxfrags, fragsz);
789 maxfrags = sndbuf_getblkcnt(rdch->bufsoft);
790 fragsz = sndbuf_getblksz(rdch->bufsoft);
793 if (wrch && ret == 0) {
795 ret = chn_setblocksize(wrch, maxfrags, fragsz);
796 maxfrags = sndbuf_getblkcnt(wrch->bufsoft);
797 fragsz = sndbuf_getblksz(wrch->bufsoft);
806 *arg_i = (maxfrags << 16) | fragln;
810 case SNDCTL_DSP_GETISPACE:
811 /* return the size of data available in the input queue */
813 audio_buf_info *a = (audio_buf_info *)arg;
815 struct snd_dbuf *bs = rdch->bufsoft;
818 a->bytes = sndbuf_getready(bs);
819 a->fragments = a->bytes / sndbuf_getblksz(bs);
820 a->fragstotal = sndbuf_getblkcnt(bs);
821 a->fragsize = sndbuf_getblksz(bs);
827 case SNDCTL_DSP_GETOSPACE:
828 /* return space available in the output queue */
830 audio_buf_info *a = (audio_buf_info *)arg;
832 struct snd_dbuf *bs = wrch->bufsoft;
836 a->bytes = sndbuf_getfree(bs);
837 a->fragments = a->bytes / sndbuf_getblksz(bs);
838 a->fragstotal = sndbuf_getblkcnt(bs);
839 a->fragsize = sndbuf_getblksz(bs);
845 case SNDCTL_DSP_GETIPTR:
847 count_info *a = (count_info *)arg;
849 struct snd_dbuf *bs = rdch->bufsoft;
853 a->bytes = sndbuf_gettotal(bs);
854 a->blocks = sndbuf_getblocks(bs) - rdch->blocks;
855 a->ptr = sndbuf_getreadyptr(bs);
856 rdch->blocks = sndbuf_getblocks(bs);
863 case SNDCTL_DSP_GETOPTR:
865 count_info *a = (count_info *)arg;
867 struct snd_dbuf *bs = wrch->bufsoft;
871 a->bytes = sndbuf_gettotal(bs);
872 a->blocks = sndbuf_getblocks(bs) - wrch->blocks;
873 a->ptr = sndbuf_getreadyptr(bs);
874 wrch->blocks = sndbuf_getblocks(bs);
881 case SNDCTL_DSP_GETCAPS:
882 *arg_i = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER;
883 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX))
884 *arg_i |= DSP_CAP_DUPLEX;
887 case SOUND_PCM_READ_BITS:
888 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_16BIT)? 16 : 8;
891 case SNDCTL_DSP_SETTRIGGER:
894 rdch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER);
895 if (*arg_i & PCM_ENABLE_INPUT)
898 rdch->flags |= CHN_F_NOTRIGGER;
903 wrch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER);
904 if (*arg_i & PCM_ENABLE_OUTPUT)
907 wrch->flags |= CHN_F_NOTRIGGER;
912 case SNDCTL_DSP_GETTRIGGER:
914 if (wrch && wrch->flags & CHN_F_TRIGGERED)
915 *arg_i |= PCM_ENABLE_OUTPUT;
916 if (rdch && rdch->flags & CHN_F_TRIGGERED)
917 *arg_i |= PCM_ENABLE_INPUT;
920 case SNDCTL_DSP_GETODELAY:
922 struct snd_dbuf *b = wrch->bufhard;
923 struct snd_dbuf *bs = wrch->bufsoft;
927 *arg_i = sndbuf_getready(b) + sndbuf_getready(bs);
933 case SNDCTL_DSP_POST:
936 wrch->flags &= ~CHN_F_NOTRIGGER;
942 case SNDCTL_DSP_MAPINBUF:
943 case SNDCTL_DSP_MAPOUTBUF:
944 case SNDCTL_DSP_SETSYNCRO:
947 case SNDCTL_DSP_SUBDIVIDE:
948 case SOUND_PCM_WRITE_FILTER:
949 case SOUND_PCM_READ_FILTER:
950 /* dunno what these do, don't sound important */
952 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd));
956 relchns(i_dev, rdch, wrch, 0);
962 dsp_poll(dev_t i_dev, int events, struct thread *td)
964 struct pcm_channel *wrch = NULL, *rdch = NULL;
970 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
973 e = (events & (POLLOUT | POLLWRNORM));
975 ret |= chn_poll(wrch, e, td);
978 e = (events & (POLLIN | POLLRDNORM));
980 ret |= chn_poll(rdch, e, td);
982 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
989 dsp_mmap(dev_t i_dev, vm_offset_t offset, int nprot)
991 struct pcm_channel *wrch = NULL, *rdch = NULL, *c;
995 if (nprot & PROT_EXEC)
999 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
1002 * XXX the linux api uses the nprot to select read/write buffer
1003 * our vm system doesn't allow this, so force write buffer
1006 if (wrch && (nprot & PROT_WRITE)) {
1008 } else if (rdch && (nprot & PROT_READ)) {
1019 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
1024 if (offset >= sndbuf_getsize(c->bufsoft)) {
1025 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
1030 if (!(c->flags & CHN_F_MAPPED))
1031 c->flags |= CHN_F_MAPPED;
1033 ret = atop(vtophys(sndbuf_getbufofs(c->bufsoft, offset)));
1034 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
1041 dsp_register(int unit, int channel)
1043 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSP, channel),
1044 UID_ROOT, GID_WHEEL, 0666, "dsp%d.%d", unit, channel);
1045 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSP16, channel),
1046 UID_ROOT, GID_WHEEL, 0666, "dspW%d.%d", unit, channel);
1047 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_AUDIO, channel),
1048 UID_ROOT, GID_WHEEL, 0666, "audio%d.%d", unit, channel);
1054 dsp_registerrec(int unit, int channel)
1056 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSPREC, channel),
1057 UID_ROOT, GID_WHEEL, 0666, "dspr%d.%d", unit, channel);
1063 dsp_unregister(int unit, int channel)
1067 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSP, channel));
1069 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSP16, channel));
1071 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_AUDIO, channel));
1078 dsp_unregisterrec(int unit, int channel)
1082 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSPREC, channel));
1090 dsp_clone(void *arg, char *name, int namelen, dev_t *dev)
1093 int i, cont, unit, devtype;
1094 int devtypes[3] = {SND_DEV_DSP, SND_DEV_DSP16, SND_DEV_AUDIO};
1095 char *devnames[3] = {"dsp", "dspW", "audio"};
1099 if (pcm_devclass == NULL)
1104 for (i = 0; (i < 3) && (unit == -1); i++) {
1105 devtype = devtypes[i];
1106 if (strcmp(name, devnames[i]) == 0) {
1109 if (dev_stdclone(name, NULL, devnames[i], &unit) != 1)
1113 if (unit == -1 || unit >= devclass_get_maxunit(pcm_devclass))
1117 for (i = 0; cont; i++) {
1118 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, devtype, i));
1119 if (pdev->si_flags & SI_NAMED) {
1120 if ((pdev->si_drv1 == NULL) && (pdev->si_drv2 == NULL)) {
1131 dsp_sysinit(void *p)
1133 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000);
1137 dsp_sysuninit(void *p)
1139 if (dsp_ehtag != NULL)
1140 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag);
1143 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL);
1144 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL);