freebsd-nq/sys/dev/sound/pcm/dsp.c
Cameron Grant 987e59726a say hello to newpcm. it is not yet enabled, requiring new pnp code from dfr
to compile successfully.  further details will be provided in the commit
enabling newpcm.
1999-09-01 04:08:39 +00:00

544 lines
15 KiB
C

/*
* Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id$
*/
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/kernel.h>
#include <dev/pcm/sound.h>
static int getchns(snddev_info *d, int chan, pcm_channel **rdch, pcm_channel **wrch);
static pcm_channel *
allocchn(snddev_info *d, int direction)
{
pcm_channel *chns = (direction == PCMDIR_PLAY)? d->play : d->rec;
int i, cnt = (direction == PCMDIR_PLAY)? d->playcount : d->reccount;
for (i = 0; i < cnt; i++) {
if (!(chns[i].flags & CHN_F_BUSY)) {
chns[i].flags |= CHN_F_BUSY;
return &chns[i];
}
}
return NULL;
}
static int
getchns(snddev_info *d, int chan, pcm_channel **rdch, pcm_channel **wrch)
{
if ((d->flags & SD_F_PRIO_SET) == SD_F_PRIO_SET)
panic("read and write both prioritised");
if (d->flags & SD_F_SIMPLEX) {
*rdch = (d->flags & SD_F_PRIO_RD)? d->arec[chan] : &d->fakechan;
*wrch = (d->flags & SD_F_PRIO_WR)? d->aplay[chan] : &d->fakechan;
} else {
*rdch = d->arec[chan];
*wrch = d->aplay[chan];
}
return 0;
}
static void
setchns(snddev_info *d, int chan)
{
if ((d->flags & SD_F_PRIO_SET) == SD_F_PRIO_SET)
panic("read and write both prioritised");
d->flags |= SD_F_DIR_SET;
if (d->flags & SD_F_EVILSB16) {
if ((d->flags & SD_F_PRIO_RD) && (d->aplay[chan])) {
pcm_channel *tmp;
tmp = d->arec[chan];
d->arec[chan] = d->aplay[chan];
d->aplay[chan] = tmp;
}
if (d->aplay[chan]) chn_setdir(d->aplay[chan], PCMDIR_PLAY);
if (d->arec[chan]) chn_setdir(d->arec[chan], PCMDIR_REC);
}
}
int
dsp_open(snddev_info *d, int chan, int oflags, int devtype)
{
pcm_channel *rdch = NULL, *wrch = NULL;
u_int32_t fmt;
if (chan >= d->chancount) return ENODEV;
if (d->aplay[chan] || d->arec[chan]) return EBUSY;
if (oflags & FREAD) {
rdch = allocchn(d, PCMDIR_REC);
if (!rdch) return EBUSY;
}
if (oflags & FWRITE) {
wrch = allocchn(d, PCMDIR_PLAY);
if (!wrch) {
if (rdch) rdch->flags &= ~CHN_F_BUSY;
return EBUSY;
}
}
d->aplay[chan] = wrch;
d->arec[chan] = rdch;
switch (devtype) {
case SND_DEV_DSP16:
fmt = AFMT_S16_LE;
break;
case SND_DEV_DSP:
fmt = AFMT_U8;
break;
case SND_DEV_AUDIO:
fmt = AFMT_MU_LAW;
break;
default:
return ENXIO;
}
if (rdch) {
chn_reset(rdch);
if (oflags & O_NONBLOCK) rdch->flags |= CHN_F_NBIO;
rdch->volume = (100 << 8) | 100;
rdch->format = fmt;
rdch->speed = DSP_DEFAULT_SPEED;
rdch->blocksize = 2048;
}
if (wrch) {
chn_reset(wrch);
if (oflags & O_NONBLOCK) wrch->flags |= CHN_F_NBIO;
wrch->volume = (100 << 8) | 100;
wrch->format = fmt;
wrch->speed = DSP_DEFAULT_SPEED;
wrch->blocksize = 2048;
}
return 0;
}
int
dsp_close(snddev_info *d, int chan, int devtype)
{
pcm_channel *rdch, *wrch;
d->flags &= ~SD_F_TRANSIENT;
getchns(d, chan, &rdch, &wrch);
if (rdch) {
chn_abort(rdch);
rdch->flags &= ~(CHN_F_BUSY | CHN_F_RUNNING | CHN_F_MAPPED);
}
if (wrch) wrch->flags &= ~(CHN_F_BUSY | CHN_F_RUNNING | CHN_F_MAPPED);
d->aplay[chan] = NULL;
d->arec[chan] = NULL;
return 0;
}
int
dsp_read(snddev_info *d, int chan, struct uio *buf, int flag)
{
pcm_channel *rdch, *wrch;
if (!(d->flags & SD_F_PRIO_SET)) d->flags |= SD_F_PRIO_RD;
if (!(d->flags & SD_F_DIR_SET)) setchns(d, chan);
getchns(d, chan, &rdch, &wrch);
if (!rdch || !(rdch->flags & CHN_F_BUSY))
panic("dsp_read: non%s channel", rdch? "busy" : "existant");
if (rdch->flags & CHN_F_MAPPED) return EINVAL;
if (!(rdch->flags & CHN_F_RUNNING)) rdch->flags |= CHN_F_RUNNING;
return chn_read(rdch, buf);
}
int
dsp_write(snddev_info *d, int chan, struct uio *buf, int flag)
{
pcm_channel *rdch, *wrch;
if (!(d->flags & SD_F_PRIO_SET)) d->flags |= SD_F_PRIO_WR;
if (!(d->flags & SD_F_DIR_SET)) setchns(d, chan);
getchns(d, chan, &rdch, &wrch);
if (!wrch || !(wrch->flags & CHN_F_BUSY))
panic("dsp_write: non%s channel", wrch? "busy" : "existant");
if (wrch->flags & CHN_F_MAPPED) return EINVAL;
if (!(wrch->flags & CHN_F_RUNNING)) wrch->flags |= CHN_F_RUNNING;
return chn_write(wrch, buf);
}
int
dsp_ioctl(snddev_info *d, int chan, u_long cmd, caddr_t arg)
{
int ret = 0, *arg_i = (int *)arg;
u_long s;
pcm_channel *wrch = NULL, *rdch = NULL;
getchns(d, chan, &rdch, &wrch);
/*
* all routines are called with int. blocked. Make sure that
* ints are re-enabled when calling slow or blocking functions!
*/
s = spltty();
switch(cmd) {
/*
* we start with the new ioctl interface.
*/
case AIONWRITE: /* how many bytes can write ? */
if (wrch && wrch->buffer.dl) chn_dmaupdate(wrch);
*arg_i = wrch? wrch->buffer.fl : 0;
break;
case AIOSSIZE: /* set the current blocksize */
{
struct snd_size *p = (struct snd_size *)arg;
splx(s);
if (wrch) chn_setblocksize(wrch, p->play_size);
if (rdch) chn_setblocksize(rdch, p->rec_size);
}
/* FALLTHROUGH */
case AIOGSIZE: /* get the current blocksize */
{
struct snd_size *p = (struct snd_size *)arg;
if (wrch) p->play_size = wrch->blocksize;
if (rdch) p->rec_size = rdch->blocksize;
}
break;
case AIOSFMT:
{
snd_chan_param *p = (snd_chan_param *)arg;
splx(s);
if (wrch) {
chn_setformat(wrch, p->play_format);
chn_setspeed(wrch, p->play_rate);
}
if (rdch) {
chn_setformat(rdch, p->rec_format);
chn_setspeed(rdch, p->rec_rate);
}
}
/* FALLTHROUGH */
case AIOGFMT:
{
snd_chan_param *p = (snd_chan_param *)arg;
p->play_rate = wrch? wrch->speed : 0;
p->rec_rate = rdch? rdch->speed : 0;
p->play_format = wrch? wrch->format : 0;
p->rec_format = rdch? rdch->format : 0;
}
break;
case AIOGCAP: /* get capabilities */
{
snd_capabilities *p = (snd_capabilities *)arg;
pcmchan_caps *pcaps = NULL, *rcaps = NULL;
if (rdch) rcaps = chn_getcaps(rdch);
if (wrch) pcaps = chn_getcaps(wrch);
p->rate_min = max(rcaps? rcaps->minspeed : 0,
pcaps? pcaps->minspeed : 0);
p->rate_max = min(rcaps? rcaps->maxspeed : 1000000,
pcaps? pcaps->maxspeed : 1000000);
p->bufsize = min(rdch? rdch->buffer.bufsize : 1000000,
wrch? wrch->buffer.bufsize : 1000000);
/* XXX bad on sb16 */
p->formats = (rcaps? rcaps->formats : 0xffffffff) &
(pcaps? pcaps->formats : 0xffffffff);
p->mixers = 1; /* default: one mixer */
p->inputs = d->mixer.devs;
p->left = p->right = 100;
}
break;
case AIOSTOP:
if (*arg_i == AIOSYNC_PLAY && wrch) *arg_i = chn_abort(wrch);
else if (*arg_i == AIOSYNC_CAPTURE && rdch) *arg_i = chn_abort(rdch);
else {
splx(s);
printf("AIOSTOP: bad channel 0x%x\n", *arg_i);
*arg_i = 0;
}
break;
case AIOSYNC:
printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos);
break;
/*
* here follow the standard ioctls (filio.h etc.)
*/
case FIONREAD: /* get # bytes to read */
if (rdch && rdch->buffer.dl) chn_dmaupdate(rdch);
*arg_i = rdch? rdch->buffer.rl : 0;
break;
case FIOASYNC: /*set/clear async i/o */
DEB( printf("FIOASYNC\n") ; )
break;
case SNDCTL_DSP_NONBLOCK:
case FIONBIO: /* set/clear non-blocking i/o */
if (rdch) rdch->flags &= ~CHN_F_NBIO;
if (wrch) wrch->flags &= ~CHN_F_NBIO;
if (*arg_i) {
if (rdch) rdch->flags |= CHN_F_NBIO;
if (wrch) wrch->flags |= CHN_F_NBIO;
}
break;
/*
* Finally, here is the linux-compatible ioctl interface
*/
#define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int)
case THE_REAL_SNDCTL_DSP_GETBLKSIZE:
case SNDCTL_DSP_GETBLKSIZE:
*arg_i = wrch? wrch->blocksize : 0; /* XXX rdch? */
break ;
case SNDCTL_DSP_SETBLKSIZE:
splx(s);
if (wrch) chn_setblocksize(wrch, *arg_i);
if (rdch) chn_setblocksize(rdch, *arg_i);
break;
case SNDCTL_DSP_RESET:
DEB(printf("dsp reset\n"));
if (wrch) chn_abort(wrch);
if (rdch) chn_abort(rdch);
break;
case SNDCTL_DSP_SYNC:
printf("dsp sync\n");
splx(s);
if (wrch) chn_sync(wrch, wrch->buffer.bufsize - 4);
break;
case SNDCTL_DSP_SPEED:
splx(s);
if (wrch) chn_setspeed(wrch, *arg_i);
if (rdch) chn_setspeed(rdch, *arg_i);
/* fallthru */
case SOUND_PCM_READ_RATE:
*arg_i = wrch? wrch->speed : rdch->speed;
break;
case SNDCTL_DSP_STEREO:
splx(s);
if (wrch) chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) |
((*arg_i)? AFMT_STEREO : 0));
if (rdch) chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) |
((*arg_i)? AFMT_STEREO : 0));
*arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 1 : 0;
break;
case SOUND_PCM_WRITE_CHANNELS:
splx(s);
if (wrch) chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) |
((*arg_i == 2)? AFMT_STEREO : 0));
if (rdch) chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) |
((*arg_i == 2)? AFMT_STEREO : 0));
/* fallthru */
case SOUND_PCM_READ_CHANNELS:
*arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1;
break;
case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */
*arg_i = wrch? chn_getcaps(wrch)->formats : chn_getcaps(rdch)->formats;
break ;
case SNDCTL_DSP_SETFMT: /* sets _one_ format */
splx(s);
if (wrch) chn_setformat(wrch, *arg_i);
if (rdch) chn_setformat(rdch, *arg_i);
*arg_i = wrch? wrch->format : rdch->format;
break;
case SNDCTL_DSP_SUBDIVIDE:
/* XXX watch out, this is RW! */
DEB(printf("SNDCTL_DSP_SUBDIVIDE unimplemented\n");)
break;
case SNDCTL_DSP_SETFRAGMENT:
/* XXX watch out, this is RW! */
DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg));
{
int bytes = 1 << min(*arg_i & 0xffff, 16);
int count = (*arg_i >> 16) & 0xffff;
pcm_channel *c = wrch? wrch : rdch;
splx(s);
if (rdch) chn_setblocksize(rdch, bytes);
if (wrch) chn_setblocksize(wrch, bytes);
/* eg: 4dwave can only interrupt at buffer midpoint, so
* it will force blocksize == bufsize/2
*/
count = c->buffer.bufsize / c->blocksize;
bytes = ffs(c->blocksize) - 1;
*arg_i = (count << 16) | bytes;
}
break;
case SNDCTL_DSP_GETISPACE:
/* return space available in the input queue */
{
audio_buf_info *a = (audio_buf_info *)arg;
if (rdch) {
snd_dbuf *b = &rdch->buffer;
if (b->dl) chn_dmaupdate(rdch);
a->bytes = b->fl;
a->fragments = 1;
a->fragstotal = b->bufsize / rdch->blocksize;
a->fragsize = rdch->blocksize;
}
}
break;
case SNDCTL_DSP_GETOSPACE:
/* return space available in the output queue */
{
audio_buf_info *a = (audio_buf_info *)arg;
if (wrch) {
snd_dbuf *b = &wrch->buffer;
if (b->dl) chn_dmaupdate(wrch);
a->bytes = b->fl;
a->fragments = 1;
a->fragstotal = b->bufsize / wrch->blocksize;
a->fragsize = wrch->blocksize;
}
}
break;
case SNDCTL_DSP_GETIPTR:
{
count_info *a = (count_info *)arg;
if (rdch) {
snd_dbuf *b = &rdch->buffer;
if (b->dl) chn_dmaupdate(rdch);
a->bytes = b->total;
a->blocks = (b->total - b->prev_total) / rdch->blocksize;
a->ptr = b->fp;
b->prev_total += a->blocks * rdch->blocksize;
} else ret = EINVAL;
}
break;
case SNDCTL_DSP_GETOPTR:
{
count_info *a = (count_info *)arg;
if (wrch) {
snd_dbuf *b = &wrch->buffer;
if (b->dl) chn_dmaupdate(wrch);
a->bytes = b->total;
a->blocks = (b->total - b->prev_total) / wrch->blocksize;
a->ptr = b->rp;
b->prev_total += a->blocks * wrch->blocksize;
} else ret = EINVAL;
}
break;
case SNDCTL_DSP_GETCAPS:
*arg_i = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER;
if (rdch && wrch && !(d->flags & SD_F_SIMPLEX))
*arg_i |= DSP_CAP_DUPLEX;
break;
case SOUND_PCM_READ_BITS:
*arg_i = ((wrch? wrch->format : rdch->format) & AFMT_16BIT)? 16 : 8;
break;
case SNDCTL_DSP_SETTRIGGER:
if (rdch) {
rdch->flags &= ~CHN_F_TRIGGERED;
if (*arg_i & PCM_ENABLE_INPUT)
rdch->flags |= CHN_F_TRIGGERED;
chn_intr(rdch);
}
if (wrch) {
wrch->flags &= ~CHN_F_TRIGGERED;
if (*arg_i & PCM_ENABLE_OUTPUT)
wrch->flags |= CHN_F_TRIGGERED;
chn_intr(wrch);
}
break;
case SNDCTL_DSP_GETTRIGGER:
*arg_i = 0;
if (wrch && wrch->flags & CHN_F_TRIGGERED)
*arg_i |= PCM_ENABLE_OUTPUT;
if (rdch && rdch->flags & CHN_F_TRIGGERED)
*arg_i |= PCM_ENABLE_INPUT;
break;
case SNDCTL_DSP_MAPINBUF:
case SNDCTL_DSP_MAPOUTBUF:
case SNDCTL_DSP_SETSYNCRO:
/* undocumented */
case SNDCTL_DSP_POST:
case SOUND_PCM_WRITE_FILTER:
case SOUND_PCM_READ_FILTER:
/* dunno what these do, don't sound important */
default:
DEB(printf("default ioctl snd%d fn 0x%08x fail\n", unit, cmd));
ret = EINVAL;
break;
}
splx(s);
return ret;
}
int
dsp_poll(snddev_info *d, int chan, int events, struct proc *p)
{
int ret = 0, e;
pcm_channel *wrch = NULL, *rdch = NULL;
getchns(d, chan, &rdch, &wrch);
e = events & (POLLOUT | POLLWRNORM);
if (wrch && e) ret |= chn_poll(wrch, e, p);
e = events & (POLLIN | POLLRDNORM);
if (rdch && e) ret |= chn_poll(rdch, e, p);
return ret;
}
int
dsp_mmap(snddev_info *d, int chan, vm_offset_t offset, int nprot)
{
pcm_channel *wrch = NULL, *rdch = NULL, *c = NULL;
getchns(d, chan, &rdch, &wrch);
/* XXX this is broken by line 204 of vm/device_pager.c, so force write buffer */
if (1 || (wrch && (nprot & PROT_WRITE))) c = wrch;
else if (rdch && (nprot & PROT_READ)) c = rdch;
if (c) {
c->flags |= CHN_F_MAPPED;
return atop(vtophys(c->buffer.buf + offset));
}
return -1;
}