freebsd-skq/sys/dev/sound/pcm/channel.c
2003-08-18 23:18:47 +00:00

1241 lines
28 KiB
C

/*
* Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
* Portions Copyright by Luigi Rizzo - 1997-99
* 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.
*/
#include <dev/sound/pcm/sound.h>
#include "feeder_if.h"
SND_DECLARE_FILE("$FreeBSD$");
#define MIN_CHUNK_SIZE 256 /* for uiomove etc. */
#define DMA_ALIGN_THRESHOLD 4
#define DMA_ALIGN_MASK (~(DMA_ALIGN_THRESHOLD - 1))
#define CANCHANGE(c) (!(c->flags & CHN_F_TRIGGERED))
/*
#define DEB(x) x
*/
static int chn_targetirqrate = 32;
TUNABLE_INT("hw.snd.targetirqrate", &chn_targetirqrate);
static int
sysctl_hw_snd_targetirqrate(SYSCTL_HANDLER_ARGS)
{
int err, val;
val = chn_targetirqrate;
err = sysctl_handle_int(oidp, &val, sizeof(val), req);
if (val < 16 || val > 512)
err = EINVAL;
else
chn_targetirqrate = val;
return err;
}
SYSCTL_PROC(_hw_snd, OID_AUTO, targetirqrate, CTLTYPE_INT | CTLFLAG_RW,
0, sizeof(int), sysctl_hw_snd_targetirqrate, "I", "");
static int report_soft_formats = 1;
SYSCTL_INT(_hw_snd, OID_AUTO, report_soft_formats, CTLFLAG_RW,
&report_soft_formats, 1, "report software-emulated formats");
static int chn_buildfeeder(struct pcm_channel *c);
static void
chn_lockinit(struct pcm_channel *c)
{
c->lock = snd_mtxcreate(c->name, "pcm channel");
}
static void
chn_lockdestroy(struct pcm_channel *c)
{
snd_mtxfree(c->lock);
}
static int
chn_polltrigger(struct pcm_channel *c)
{
struct snd_dbuf *bs = c->bufsoft;
unsigned amt, lim;
CHN_LOCKASSERT(c);
if (c->flags & CHN_F_MAPPED) {
if (sndbuf_getprevblocks(bs) == 0)
return 1;
else
return (sndbuf_getblocks(bs) > sndbuf_getprevblocks(bs))? 1 : 0;
} else {
amt = (c->direction == PCMDIR_PLAY)? sndbuf_getfree(bs) : sndbuf_getready(bs);
lim = (c->flags & CHN_F_HAS_SIZE)? sndbuf_getblksz(bs) : 1;
lim = 1;
return (amt >= lim)? 1 : 0;
}
return 0;
}
static int
chn_pollreset(struct pcm_channel *c)
{
struct snd_dbuf *bs = c->bufsoft;
CHN_LOCKASSERT(c);
sndbuf_updateprevtotal(bs);
return 1;
}
static void
chn_wakeup(struct pcm_channel *c)
{
struct snd_dbuf *bs = c->bufsoft;
CHN_LOCKASSERT(c);
if (SEL_WAITING(sndbuf_getsel(bs)) && chn_polltrigger(c))
selwakeup(sndbuf_getsel(bs));
wakeup(bs);
}
static int
chn_sleep(struct pcm_channel *c, char *str, int timeout)
{
struct snd_dbuf *bs = c->bufsoft;
int ret;
CHN_LOCKASSERT(c);
#ifdef USING_MUTEX
ret = msleep(bs, c->lock, PRIBIO | PCATCH, str, timeout);
#else
ret = tsleep(bs, PRIBIO | PCATCH, str, timeout);
#endif
return ret;
}
/*
* chn_dmaupdate() tracks the status of a dma transfer,
* updating pointers. It must be called at spltty().
*/
static unsigned int
chn_dmaupdate(struct pcm_channel *c)
{
struct snd_dbuf *b = c->bufhard;
unsigned int delta, old, hwptr, amt;
KASSERT(sndbuf_getsize(b) > 0, ("bufsize == 0"));
CHN_LOCKASSERT(c);
old = sndbuf_gethwptr(b);
hwptr = chn_getptr(c);
delta = (sndbuf_getsize(b) + hwptr - old) % sndbuf_getsize(b);
sndbuf_sethwptr(b, hwptr);
DEB(
if (delta >= ((sndbuf_getsize(b) * 15) / 16)) {
if (!(c->flags & (CHN_F_CLOSING | CHN_F_ABORTING)))
device_printf(c->dev, "hwptr went backwards %d -> %d\n", old, hwptr);
}
);
if (c->direction == PCMDIR_PLAY) {
amt = MIN(delta, sndbuf_getready(b));
if (amt > 0)
sndbuf_dispose(b, NULL, amt);
} else {
amt = MIN(delta, sndbuf_getfree(b));
if (amt > 0)
sndbuf_acquire(b, NULL, amt);
}
return delta;
}
void
chn_wrupdate(struct pcm_channel *c)
{
int ret;
CHN_LOCKASSERT(c);
KASSERT(c->direction == PCMDIR_PLAY, ("chn_wrupdate on bad channel"));
if ((c->flags & (CHN_F_MAPPED | CHN_F_VIRTUAL)) || !(c->flags & CHN_F_TRIGGERED))
return;
chn_dmaupdate(c);
ret = chn_wrfeed(c);
/* tell the driver we've updated the primary buffer */
chn_trigger(c, PCMTRIG_EMLDMAWR);
DEB(if (ret)
printf("chn_wrupdate: chn_wrfeed returned %d\n", ret);)
}
int
chn_wrfeed(struct pcm_channel *c)
{
struct snd_dbuf *b = c->bufhard;
struct snd_dbuf *bs = c->bufsoft;
unsigned int ret, amt;
CHN_LOCKASSERT(c);
DEB(
if (c->flags & CHN_F_CLOSING) {
sndbuf_dump(b, "b", 0x02);
sndbuf_dump(bs, "bs", 0x02);
})
if (c->flags & CHN_F_MAPPED)
sndbuf_acquire(bs, NULL, sndbuf_getfree(bs));
amt = sndbuf_getfree(b);
if (sndbuf_getready(bs) < amt)
c->xruns++;
ret = (amt > 0)? sndbuf_feed(bs, b, c, c->feeder, amt) : ENOSPC;
if (ret == 0 && sndbuf_getfree(b) < amt)
chn_wakeup(c);
return ret;
}
static void
chn_wrintr(struct pcm_channel *c)
{
int ret;
CHN_LOCKASSERT(c);
/* update pointers in primary buffer */
chn_dmaupdate(c);
/* ...and feed from secondary to primary */
ret = chn_wrfeed(c);
/* tell the driver we've updated the primary buffer */
chn_trigger(c, PCMTRIG_EMLDMAWR);
DEB(if (ret)
printf("chn_wrintr: chn_wrfeed returned %d\n", ret);)
}
/*
* user write routine - uiomove data into secondary buffer, trigger if necessary
* if blocking, sleep, rinse and repeat.
*
* called externally, so must handle locking
*/
int
chn_write(struct pcm_channel *c, struct uio *buf)
{
int ret, timeout, newsize, count, sz;
struct snd_dbuf *bs = c->bufsoft;
CHN_LOCKASSERT(c);
/*
* XXX Certain applications attempt to write larger size
* of pcm data than c->blocksize2nd without blocking,
* resulting partial write. Expand the block size so that
* the write operation avoids blocking.
*/
if ((c->flags & CHN_F_NBIO) && buf->uio_resid > sndbuf_getblksz(bs)) {
DEB(device_printf(c->dev, "broken app, nbio and tried to write %d bytes with fragsz %d\n",
buf->uio_resid, sndbuf_getblksz(bs)));
newsize = 16;
while (newsize < min(buf->uio_resid, CHN_2NDBUFMAXSIZE / 2))
newsize <<= 1;
chn_setblocksize(c, sndbuf_getblkcnt(bs), newsize);
DEB(device_printf(c->dev, "frags reset to %d x %d\n", sndbuf_getblkcnt(bs), sndbuf_getblksz(bs)));
}
ret = 0;
count = hz;
while (!ret && (buf->uio_resid > 0) && (count > 0)) {
sz = sndbuf_getfree(bs);
if (sz == 0) {
if (c->flags & CHN_F_NBIO)
ret = EWOULDBLOCK;
else {
timeout = (hz * sndbuf_getblksz(bs)) / (sndbuf_getspd(bs) * sndbuf_getbps(bs));
if (timeout < 1)
timeout = 1;
timeout = 1;
ret = chn_sleep(c, "pcmwr", timeout);
if (ret == EWOULDBLOCK) {
count -= timeout;
ret = 0;
} else if (ret == 0)
count = hz;
}
} else {
sz = MIN(sz, buf->uio_resid);
KASSERT(sz > 0, ("confusion in chn_write"));
/* printf("sz: %d\n", sz); */
ret = sndbuf_uiomove(bs, buf, sz);
if (ret == 0 && !(c->flags & CHN_F_TRIGGERED))
chn_start(c, 0);
}
}
/* printf("ret: %d left: %d\n", ret, buf->uio_resid); */
if (count <= 0) {
c->flags |= CHN_F_DEAD;
printf("%s: play interrupt timeout, channel dead\n", c->name);
}
return ret;
}
static int
chn_rddump(struct pcm_channel *c, unsigned int cnt)
{
struct snd_dbuf *b = c->bufhard;
CHN_LOCKASSERT(c);
sndbuf_setxrun(b, sndbuf_getxrun(b) + cnt);
return sndbuf_dispose(b, NULL, cnt);
}
/*
* Feed new data from the read buffer. Can be called in the bottom half.
* Hence must be called at spltty.
*/
int
chn_rdfeed(struct pcm_channel *c)
{
struct snd_dbuf *b = c->bufhard;
struct snd_dbuf *bs = c->bufsoft;
unsigned int ret, amt;
CHN_LOCKASSERT(c);
DEB(
if (c->flags & CHN_F_CLOSING) {
sndbuf_dump(b, "b", 0x02);
sndbuf_dump(bs, "bs", 0x02);
})
amt = sndbuf_getready(b);
if (sndbuf_getfree(bs) < amt) {
c->xruns++;
amt = sndbuf_getfree(bs);
}
ret = (amt > 0)? sndbuf_feed(b, bs, c, c->feeder, amt) : 0;
amt = sndbuf_getready(b);
if (amt > 0)
chn_rddump(c, amt);
chn_wakeup(c);
return ret;
}
void
chn_rdupdate(struct pcm_channel *c)
{
int ret;
CHN_LOCKASSERT(c);
KASSERT(c->direction == PCMDIR_REC, ("chn_rdupdate on bad channel"));
if ((c->flags & CHN_F_MAPPED) || !(c->flags & CHN_F_TRIGGERED))
return;
chn_trigger(c, PCMTRIG_EMLDMARD);
chn_dmaupdate(c);
ret = chn_rdfeed(c);
if (ret)
printf("chn_rdfeed: %d\n", ret);
}
/* read interrupt routine. Must be called with interrupts blocked. */
static void
chn_rdintr(struct pcm_channel *c)
{
int ret;
CHN_LOCKASSERT(c);
/* tell the driver to update the primary buffer if non-dma */
chn_trigger(c, PCMTRIG_EMLDMARD);
/* update pointers in primary buffer */
chn_dmaupdate(c);
/* ...and feed from primary to secondary */
ret = chn_rdfeed(c);
}
/*
* user read routine - trigger if necessary, uiomove data from secondary buffer
* if blocking, sleep, rinse and repeat.
*
* called externally, so must handle locking
*/
int
chn_read(struct pcm_channel *c, struct uio *buf)
{
int ret, timeout, sz, count;
struct snd_dbuf *bs = c->bufsoft;
CHN_LOCKASSERT(c);
if (!(c->flags & CHN_F_TRIGGERED))
chn_start(c, 0);
ret = 0;
count = hz;
while (!ret && (buf->uio_resid > 0) && (count > 0)) {
sz = MIN(buf->uio_resid, sndbuf_getready(bs));
if (sz > 0) {
ret = sndbuf_uiomove(bs, buf, sz);
} else {
if (c->flags & CHN_F_NBIO) {
ret = EWOULDBLOCK;
} else {
timeout = (hz * sndbuf_getblksz(bs)) / (sndbuf_getspd(bs) * sndbuf_getbps(bs));
if (timeout < 1)
timeout = 1;
ret = chn_sleep(c, "pcmrd", timeout);
if (ret == EWOULDBLOCK) {
count -= timeout;
ret = 0;
} else {
count = hz;
}
}
}
}
if (count <= 0) {
c->flags |= CHN_F_DEAD;
printf("%s: record interrupt timeout, channel dead\n", c->name);
}
return ret;
}
void
chn_intr(struct pcm_channel *c)
{
CHN_LOCK(c);
c->interrupts++;
if (c->direction == PCMDIR_PLAY)
chn_wrintr(c);
else
chn_rdintr(c);
CHN_UNLOCK(c);
}
u_int32_t
chn_start(struct pcm_channel *c, int force)
{
u_int32_t i, j;
struct snd_dbuf *b = c->bufhard;
struct snd_dbuf *bs = c->bufsoft;
CHN_LOCKASSERT(c);
/* if we're running, or if we're prevented from triggering, bail */
if ((c->flags & CHN_F_TRIGGERED) || ((c->flags & CHN_F_NOTRIGGER) && !force))
return EINVAL;
i = (c->direction == PCMDIR_PLAY)? sndbuf_getready(bs) : sndbuf_getfree(bs);
j = (c->direction == PCMDIR_PLAY)? sndbuf_getfree(b) : sndbuf_getready(b);
if (force || (i >= j)) {
c->flags |= CHN_F_TRIGGERED;
/*
* if we're starting because a vchan started, don't feed any data
* or it becomes impossible to start vchans synchronised with the
* first one. the hardbuf should be empty so we top it up with
* silence to give it something to chew. the real data will be
* fed at the first irq.
*/
if (c->direction == PCMDIR_PLAY) {
if (SLIST_EMPTY(&c->children))
chn_wrfeed(c);
else
sndbuf_fillsilence(b);
}
sndbuf_setrun(b, 1);
c->xruns = 0;
chn_trigger(c, PCMTRIG_START);
return 0;
}
return 0;
}
void
chn_resetbuf(struct pcm_channel *c)
{
struct snd_dbuf *b = c->bufhard;
struct snd_dbuf *bs = c->bufsoft;
c->blocks = 0;
sndbuf_reset(b);
sndbuf_reset(bs);
}
/*
* chn_sync waits until the space in the given channel goes above
* a threshold. The threshold is checked against fl or rl respectively.
* Assume that the condition can become true, do not check here...
*/
int
chn_sync(struct pcm_channel *c, int threshold)
{
u_long rdy;
int ret;
struct snd_dbuf *bs = c->bufsoft;
CHN_LOCKASSERT(c);
/* if we haven't yet started and nothing is buffered, else start*/
if (!(c->flags & CHN_F_TRIGGERED)) {
if (sndbuf_getready(bs) > 0) {
ret = chn_start(c, 1);
if (ret)
return ret;
} else {
return 0;
}
}
for (;;) {
rdy = (c->direction == PCMDIR_PLAY)? sndbuf_getfree(bs) : sndbuf_getready(bs);
if (rdy <= threshold) {
ret = chn_sleep(c, "pcmsyn", 1);
if (ret == ERESTART || ret == EINTR) {
DEB(printf("chn_sync: tsleep returns %d\n", ret));
return -1;
}
} else
break;
}
return 0;
}
/* called externally, handle locking */
int
chn_poll(struct pcm_channel *c, int ev, struct thread *td)
{
struct snd_dbuf *bs = c->bufsoft;
int ret;
CHN_LOCKASSERT(c);
if (!(c->flags & CHN_F_MAPPED) && !(c->flags & CHN_F_TRIGGERED))
chn_start(c, 1);
ret = 0;
if (chn_polltrigger(c) && chn_pollreset(c))
ret = ev;
else
selrecord(td, sndbuf_getsel(bs));
return ret;
}
/*
* chn_abort terminates a running dma transfer. it may sleep up to 200ms.
* it returns the number of bytes that have not been transferred.
*
* called from: dsp_close, dsp_ioctl, with channel locked
*/
int
chn_abort(struct pcm_channel *c)
{
int missing = 0;
struct snd_dbuf *b = c->bufhard;
struct snd_dbuf *bs = c->bufsoft;
CHN_LOCKASSERT(c);
if (!(c->flags & CHN_F_TRIGGERED))
return 0;
c->flags |= CHN_F_ABORTING;
c->flags &= ~CHN_F_TRIGGERED;
/* kill the channel */
chn_trigger(c, PCMTRIG_ABORT);
sndbuf_setrun(b, 0);
if (!(c->flags & CHN_F_VIRTUAL))
chn_dmaupdate(c);
missing = sndbuf_getready(bs) + sndbuf_getready(b);
c->flags &= ~CHN_F_ABORTING;
return missing;
}
/*
* this routine tries to flush the dma transfer. It is called
* on a close of a playback channel.
* first, if there is data in the buffer, but the dma has not yet
* begun, we need to start it.
* next, we wait for the play buffer to drain
* finally, we stop the dma.
*
* called from: dsp_close, not valid for record channels.
*/
int
chn_flush(struct pcm_channel *c)
{
int ret, count, resid, resid_p;
struct snd_dbuf *b = c->bufhard;
struct snd_dbuf *bs = c->bufsoft;
CHN_LOCKASSERT(c);
KASSERT(c->direction == PCMDIR_PLAY, ("chn_flush on bad channel"));
DEB(printf("chn_flush: c->flags 0x%08x\n", c->flags));
/* if we haven't yet started and nothing is buffered, else start*/
if (!(c->flags & CHN_F_TRIGGERED)) {
if (sndbuf_getready(bs) > 0) {
ret = chn_start(c, 1);
if (ret)
return ret;
} else {
return 0;
}
}
c->flags |= CHN_F_CLOSING;
resid = sndbuf_getready(bs) + sndbuf_getready(b);
resid_p = resid;
count = 10;
ret = 0;
while ((count > 0) && (resid > sndbuf_getsize(b)) && (ret == 0)) {
/* still pending output data. */
ret = chn_sleep(c, "pcmflu", hz / 10);
if (ret == EWOULDBLOCK)
ret = 0;
if (ret == 0) {
resid = sndbuf_getready(bs) + sndbuf_getready(b);
if (resid == resid_p)
count--;
if (resid > resid_p)
DEB(printf("chn_flush: buffer length increasind %d -> %d\n", resid_p, resid));
resid_p = resid;
}
}
if (count == 0)
DEB(printf("chn_flush: timeout, hw %d, sw %d\n",
sndbuf_getready(b), sndbuf_getready(bs)));
c->flags &= ~CHN_F_TRIGGERED;
/* kill the channel */
chn_trigger(c, PCMTRIG_ABORT);
sndbuf_setrun(b, 0);
c->flags &= ~CHN_F_CLOSING;
return 0;
}
int
fmtvalid(u_int32_t fmt, u_int32_t *fmtlist)
{
int i;
for (i = 0; fmtlist[i]; i++)
if (fmt == fmtlist[i])
return 1;
return 0;
}
int
chn_reset(struct pcm_channel *c, u_int32_t fmt)
{
int hwspd, r;
CHN_LOCKASSERT(c);
c->flags &= CHN_F_RESET;
c->interrupts = 0;
c->xruns = 0;
r = CHANNEL_RESET(c->methods, c->devinfo);
if (fmt != 0) {
hwspd = DSP_DEFAULT_SPEED;
/* only do this on a record channel until feederbuilder works */
if (c->direction == PCMDIR_REC)
RANGE(hwspd, chn_getcaps(c)->minspeed, chn_getcaps(c)->maxspeed);
c->speed = hwspd;
if (r == 0)
r = chn_setformat(c, fmt);
if (r == 0)
r = chn_setspeed(c, hwspd);
if (r == 0)
r = chn_setvolume(c, 100, 100);
}
if (r == 0)
r = chn_setblocksize(c, 0, 0);
if (r == 0) {
chn_resetbuf(c);
r = CHANNEL_RESETDONE(c->methods, c->devinfo);
}
return r;
}
int
chn_init(struct pcm_channel *c, void *devinfo, int dir)
{
struct feeder_class *fc;
struct snd_dbuf *b, *bs;
int ret;
chn_lockinit(c);
b = NULL;
bs = NULL;
c->devinfo = NULL;
c->feeder = NULL;
ret = EINVAL;
fc = feeder_getclass(NULL);
if (fc == NULL)
goto out;
if (chn_addfeeder(c, fc, NULL))
goto out;
ret = ENOMEM;
b = sndbuf_create(c->dev, c->name, "primary");
if (b == NULL)
goto out;
bs = sndbuf_create(c->dev, c->name, "secondary");
if (bs == NULL)
goto out;
sndbuf_setup(bs, NULL, 0);
c->bufhard = b;
c->bufsoft = bs;
c->flags = 0;
c->feederflags = 0;
ret = ENODEV;
c->devinfo = CHANNEL_INIT(c->methods, devinfo, b, c, dir);
if (c->devinfo == NULL)
goto out;
ret = ENOMEM;
if ((sndbuf_getsize(b) == 0) && ((c->flags & CHN_F_VIRTUAL) == 0))
goto out;
ret = chn_setdir(c, dir);
if (ret)
goto out;
ret = sndbuf_setfmt(b, AFMT_U8);
if (ret)
goto out;
ret = sndbuf_setfmt(bs, AFMT_U8);
if (ret)
goto out;
out:
if (ret) {
if (c->devinfo) {
if (CHANNEL_FREE(c->methods, c->devinfo))
sndbuf_free(b);
}
if (bs)
sndbuf_destroy(bs);
if (b)
sndbuf_destroy(b);
c->flags |= CHN_F_DEAD;
chn_lockdestroy(c);
return ret;
}
return 0;
}
int
chn_kill(struct pcm_channel *c)
{
struct snd_dbuf *b = c->bufhard;
struct snd_dbuf *bs = c->bufsoft;
if (c->flags & CHN_F_TRIGGERED)
chn_trigger(c, PCMTRIG_ABORT);
while (chn_removefeeder(c) == 0);
if (CHANNEL_FREE(c->methods, c->devinfo))
sndbuf_free(b);
c->flags |= CHN_F_DEAD;
sndbuf_destroy(bs);
sndbuf_destroy(b);
chn_lockdestroy(c);
return 0;
}
int
chn_setdir(struct pcm_channel *c, int dir)
{
struct snd_dbuf *b = c->bufhard;
int r;
CHN_LOCKASSERT(c);
c->direction = dir;
r = CHANNEL_SETDIR(c->methods, c->devinfo, c->direction);
if (!r && SND_DMA(b))
sndbuf_dmasetdir(b, c->direction);
return r;
}
int
chn_setvolume(struct pcm_channel *c, int left, int right)
{
CHN_LOCKASSERT(c);
/* should add a feeder for volume changing if channel returns -1 */
c->volume = (left << 8) | right;
return 0;
}
static int
chn_tryspeed(struct pcm_channel *c, int speed)
{
struct pcm_feeder *f;
struct snd_dbuf *b = c->bufhard;
struct snd_dbuf *bs = c->bufsoft;
struct snd_dbuf *x;
int r, delta;
CHN_LOCKASSERT(c);
DEB(printf("setspeed, channel %s\n", c->name));
DEB(printf("want speed %d, ", speed));
if (speed <= 0)
return EINVAL;
if (CANCHANGE(c)) {
r = 0;
c->speed = speed;
sndbuf_setspd(bs, speed);
RANGE(speed, chn_getcaps(c)->minspeed, chn_getcaps(c)->maxspeed);
DEB(printf("try speed %d, ", speed));
sndbuf_setspd(b, CHANNEL_SETSPEED(c->methods, c->devinfo, speed));
DEB(printf("got speed %d\n", sndbuf_getspd(b)));
delta = sndbuf_getspd(b) - sndbuf_getspd(bs);
if (delta < 0)
delta = -delta;
c->feederflags &= ~(1 << FEEDER_RATE);
if (delta > 500)
c->feederflags |= 1 << FEEDER_RATE;
else
sndbuf_setspd(bs, sndbuf_getspd(b));
r = chn_buildfeeder(c);
DEB(printf("r = %d\n", r));
if (r)
goto out;
r = chn_setblocksize(c, 0, 0);
if (r)
goto out;
if (!(c->feederflags & (1 << FEEDER_RATE)))
goto out;
r = EINVAL;
f = chn_findfeeder(c, FEEDER_RATE);
DEB(printf("feedrate = %p\n", f));
if (f == NULL)
goto out;
x = (c->direction == PCMDIR_REC)? b : bs;
r = FEEDER_SET(f, FEEDRATE_SRC, sndbuf_getspd(x));
DEB(printf("feeder_set(FEEDRATE_SRC, %d) = %d\n", sndbuf_getspd(x), r));
if (r)
goto out;
x = (c->direction == PCMDIR_REC)? bs : b;
r = FEEDER_SET(f, FEEDRATE_DST, sndbuf_getspd(x));
DEB(printf("feeder_set(FEEDRATE_DST, %d) = %d\n", sndbuf_getspd(x), r));
out:
DEB(printf("setspeed done, r = %d\n", r));
return r;
} else
return EINVAL;
}
int
chn_setspeed(struct pcm_channel *c, int speed)
{
int r, oldspeed = c->speed;
r = chn_tryspeed(c, speed);
if (r) {
DEB(printf("Failed to set speed %d falling back to %d\n", speed, oldspeed));
r = chn_tryspeed(c, oldspeed);
}
return r;
}
static int
chn_tryformat(struct pcm_channel *c, u_int32_t fmt)
{
struct snd_dbuf *b = c->bufhard;
struct snd_dbuf *bs = c->bufsoft;
int r;
CHN_LOCKASSERT(c);
if (CANCHANGE(c)) {
DEB(printf("want format %d\n", fmt));
c->format = fmt;
r = chn_buildfeeder(c);
if (r == 0) {
sndbuf_setfmt(bs, c->format);
chn_resetbuf(c);
r = CHANNEL_SETFORMAT(c->methods, c->devinfo, sndbuf_getfmt(b));
if (r == 0)
r = chn_tryspeed(c, c->speed);
}
return r;
} else
return EINVAL;
}
int
chn_setformat(struct pcm_channel *c, u_int32_t fmt)
{
u_int32_t oldfmt = c->format;
int r;
r = chn_tryformat(c, fmt);
if (r) {
DEB(printf("Format change %d failed, reverting to %d\n", fmt, oldfmt));
chn_tryformat(c, oldfmt);
}
return r;
}
int
chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz)
{
struct snd_dbuf *b = c->bufhard;
struct snd_dbuf *bs = c->bufsoft;
int bufsz, irqhz, tmp, ret;
CHN_LOCKASSERT(c);
if (!CANCHANGE(c) || (c->flags & CHN_F_MAPPED))
return EINVAL;
ret = 0;
DEB(printf("%s(%d, %d)\n", __func__, blkcnt, blksz));
if (blksz == 0 || blksz == -1) {
if (blksz == -1)
c->flags &= ~CHN_F_HAS_SIZE;
if (!(c->flags & CHN_F_HAS_SIZE)) {
blksz = (sndbuf_getbps(bs) * sndbuf_getspd(bs)) / chn_targetirqrate;
tmp = 32;
while (tmp <= blksz)
tmp <<= 1;
tmp >>= 1;
blksz = tmp;
blkcnt = CHN_2NDBUFMAXSIZE / blksz;
RANGE(blksz, 16, CHN_2NDBUFMAXSIZE / 2);
RANGE(blkcnt, 2, CHN_2NDBUFMAXSIZE / blksz);
DEB(printf("%s: defaulting to (%d, %d)\n", __func__, blkcnt, blksz));
} else {
blkcnt = sndbuf_getblkcnt(bs);
blksz = sndbuf_getblksz(bs);
DEB(printf("%s: updating (%d, %d)\n", __func__, blkcnt, blksz));
}
} else {
ret = EINVAL;
if ((blksz < 16) || (blkcnt < 2) || (blkcnt * blksz > CHN_2NDBUFMAXSIZE))
goto out;
ret = 0;
c->flags |= CHN_F_HAS_SIZE;
}
bufsz = blkcnt * blksz;
ret = sndbuf_remalloc(bs, blkcnt, blksz);
if (ret)
goto out;
/* adjust for different hw format/speed */
irqhz = (sndbuf_getbps(bs) * sndbuf_getspd(bs)) / sndbuf_getblksz(bs);
DEB(printf("%s: soft bps %d, spd %d, irqhz == %d\n", __func__, sndbuf_getbps(bs), sndbuf_getspd(bs), irqhz));
RANGE(irqhz, 16, 512);
sndbuf_setblksz(b, (sndbuf_getbps(b) * sndbuf_getspd(b)) / irqhz);
/* round down to 2^x */
blksz = 32;
while (blksz <= sndbuf_getblksz(b))
blksz <<= 1;
blksz >>= 1;
/* round down to fit hw buffer size */
RANGE(blksz, 16, sndbuf_getmaxsize(b) / 2);
DEB(printf("%s: hard blksz requested %d (maxsize %d), ", __func__, blksz, sndbuf_getmaxsize(b)));
sndbuf_setblksz(b, CHANNEL_SETBLOCKSIZE(c->methods, c->devinfo, blksz));
irqhz = (sndbuf_getbps(b) * sndbuf_getspd(b)) / sndbuf_getblksz(b);
DEB(printf("got %d, irqhz == %d\n", sndbuf_getblksz(b), irqhz));
chn_resetbuf(c);
out:
return ret;
}
int
chn_trigger(struct pcm_channel *c, int go)
{
struct snd_dbuf *b = c->bufhard;
int ret;
CHN_LOCKASSERT(c);
if (SND_DMA(b) && (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD))
sndbuf_dmabounce(b);
ret = CHANNEL_TRIGGER(c->methods, c->devinfo, go);
return ret;
}
int
chn_getptr(struct pcm_channel *c)
{
int hwptr;
int a = (1 << c->align) - 1;
CHN_LOCKASSERT(c);
hwptr = (c->flags & CHN_F_TRIGGERED)? CHANNEL_GETPTR(c->methods, c->devinfo) : 0;
/* don't allow unaligned values in the hwa ptr */
#if 1
hwptr &= ~a ; /* Apply channel align mask */
#endif
hwptr &= DMA_ALIGN_MASK; /* Apply DMA align mask */
return hwptr;
}
struct pcmchan_caps *
chn_getcaps(struct pcm_channel *c)
{
CHN_LOCKASSERT(c);
return CHANNEL_GETCAPS(c->methods, c->devinfo);
}
u_int32_t
chn_getformats(struct pcm_channel *c)
{
u_int32_t *fmtlist, fmts;
int i;
fmtlist = chn_getcaps(c)->fmtlist;
fmts = 0;
for (i = 0; fmtlist[i]; i++)
fmts |= fmtlist[i];
/* report software-supported formats */
if (report_soft_formats)
fmts |= AFMT_MU_LAW|AFMT_A_LAW|AFMT_U16_LE|AFMT_U16_BE|
AFMT_S16_LE|AFMT_S16_BE|AFMT_U8|AFMT_S8;
return fmts;
}
static int
chn_buildfeeder(struct pcm_channel *c)
{
struct feeder_class *fc;
struct pcm_feederdesc desc;
u_int32_t tmp[2], type, flags, hwfmt;
int err;
CHN_LOCKASSERT(c);
while (chn_removefeeder(c) == 0);
KASSERT((c->feeder == NULL), ("feeder chain not empty"));
c->align = sndbuf_getalign(c->bufsoft);
if (SLIST_EMPTY(&c->children)) {
fc = feeder_getclass(NULL);
KASSERT(fc != NULL, ("can't find root feeder"));
err = chn_addfeeder(c, fc, NULL);
if (err) {
DEB(printf("can't add root feeder, err %d\n", err));
return err;
}
c->feeder->desc->out = c->format;
} else {
desc.type = FEEDER_MIXER;
desc.in = 0;
desc.out = c->format;
desc.flags = 0;
fc = feeder_getclass(&desc);
if (fc == NULL) {
DEB(printf("can't find vchan feeder\n"));
return EOPNOTSUPP;
}
err = chn_addfeeder(c, fc, &desc);
if (err) {
DEB(printf("can't add vchan feeder, err %d\n", err));
return err;
}
}
flags = c->feederflags;
DEB(printf("feederflags %x\n", flags));
for (type = FEEDER_RATE; type <= FEEDER_LAST; type++) {
if (flags & (1 << type)) {
desc.type = type;
desc.in = 0;
desc.out = 0;
desc.flags = 0;
DEB(printf("find feeder type %d, ", type));
fc = feeder_getclass(&desc);
DEB(printf("got %p\n", fc));
if (fc == NULL) {
DEB(printf("can't find required feeder type %d\n", type));
return EOPNOTSUPP;
}
if (c->feeder->desc->out != fc->desc->in) {
DEB(printf("build fmtchain from 0x%x to 0x%x: ", c->feeder->desc->out, fc->desc->in));
tmp[0] = fc->desc->in;
tmp[1] = 0;
if (chn_fmtchain(c, tmp) == 0) {
DEB(printf("failed\n"));
return ENODEV;
}
DEB(printf("ok\n"));
}
err = chn_addfeeder(c, fc, fc->desc);
if (err) {
DEB(printf("can't add feeder %p, output 0x%x, err %d\n", fc, fc->desc->out, err));
return err;
}
DEB(printf("added feeder %p, output 0x%x\n", fc, c->feeder->desc->out));
}
}
if (fmtvalid(c->feeder->desc->out, chn_getcaps(c)->fmtlist)) {
hwfmt = c->feeder->desc->out;
} else {
if (c->direction == PCMDIR_REC) {
tmp[0] = c->format;
tmp[1] = 0;
hwfmt = chn_fmtchain(c, tmp);
} else {
#if 0
u_int32_t *x = chn_getcaps(c)->fmtlist;
printf("acceptable formats for %s:\n", c->name);
while (*x) {
printf("[0x%8x] ", *x);
x++;
}
#endif
hwfmt = chn_fmtchain(c, chn_getcaps(c)->fmtlist);
}
}
if (hwfmt == 0)
return ENODEV;
sndbuf_setfmt(c->bufhard, hwfmt);
return 0;
}
int
chn_notify(struct pcm_channel *c, u_int32_t flags)
{
struct pcmchan_children *pce;
struct pcm_channel *child;
int run;
if (SLIST_EMPTY(&c->children))
return ENODEV;
run = (c->flags & CHN_F_TRIGGERED)? 1 : 0;
/*
* if the hwchan is running, we can't change its rate, format or
* blocksize
*/
if (run)
flags &= CHN_N_VOLUME | CHN_N_TRIGGER;
if (flags & CHN_N_RATE) {
/*
* we could do something here, like scan children and decide on
* the most appropriate rate to mix at, but we don't for now
*/
}
if (flags & CHN_N_FORMAT) {
/*
* we could do something here, like scan children and decide on
* the most appropriate mixer feeder to use, but we don't for now
*/
}
if (flags & CHN_N_VOLUME) {
/*
* we could do something here but we don't for now
*/
}
if (flags & CHN_N_BLOCKSIZE) {
int blksz;
/*
* scan the children, find the lowest blocksize and use that
* for the hard blocksize
*/
blksz = sndbuf_getmaxsize(c->bufhard) / 2;
SLIST_FOREACH(pce, &c->children, link) {
child = pce->channel;
if (sndbuf_getblksz(child->bufhard) < blksz)
blksz = sndbuf_getblksz(child->bufhard);
}
chn_setblocksize(c, 2, blksz);
}
if (flags & CHN_N_TRIGGER) {
int nrun;
/*
* scan the children, and figure out if any are running
* if so, we need to be running, otherwise we need to be stopped
* if we aren't in our target sstate, move to it
*/
nrun = 0;
SLIST_FOREACH(pce, &c->children, link) {
child = pce->channel;
if (child->flags & CHN_F_TRIGGERED)
nrun = 1;
}
if (nrun && !run)
chn_start(c, 1);
if (!nrun && run)
chn_abort(c);
}
return 0;
}