freebsd-skq/sys/dev/sound/pcm/mixer.c
Poul-Henning Kamp 7ac40f5f59 Gigacommit to improve device-driver source compatibility between
branches:

Initialize struct cdevsw using C99 sparse initializtion and remove
all initializations to default values.

This patch is automatically generated and has been tested by compiling
LINT with all the fields in struct cdevsw in reverse order on alpha,
sparc64 and i386.

Approved by:    re(scottl)
2003-03-03 12:15:54 +00:00

512 lines
10 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.
*/
#include <dev/sound/pcm/sound.h>
#include "mixer_if.h"
SND_DECLARE_FILE("$FreeBSD$");
MALLOC_DEFINE(M_MIXER, "mixer", "mixer");
#define MIXER_NAMELEN 16
struct snd_mixer {
KOBJ_FIELDS;
const char *type;
void *devinfo;
int busy;
int hwvol_muted;
int hwvol_mixer;
int hwvol_step;
u_int32_t hwvol_mute_level;
u_int32_t devs;
u_int32_t recdevs;
u_int32_t recsrc;
u_int16_t level[32];
char name[MIXER_NAMELEN];
struct mtx *lock;
};
static u_int16_t snd_mixerdefaults[SOUND_MIXER_NRDEVICES] = {
[SOUND_MIXER_VOLUME] = 75,
[SOUND_MIXER_BASS] = 50,
[SOUND_MIXER_TREBLE] = 50,
[SOUND_MIXER_SYNTH] = 75,
[SOUND_MIXER_PCM] = 75,
[SOUND_MIXER_SPEAKER] = 75,
[SOUND_MIXER_LINE] = 75,
[SOUND_MIXER_MIC] = 0,
[SOUND_MIXER_CD] = 75,
[SOUND_MIXER_LINE1] = 75,
[SOUND_MIXER_VIDEO] = 75,
[SOUND_MIXER_RECLEV] = 0,
[SOUND_MIXER_OGAIN] = 50,
[SOUND_MIXER_MONITOR] = 75,
};
static char* snd_mixernames[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
static d_open_t mixer_open;
static d_close_t mixer_close;
static struct cdevsw mixer_cdevsw = {
.d_open = mixer_open,
.d_close = mixer_close,
.d_ioctl = mixer_ioctl,
.d_name = "mixer",
.d_maj = SND_CDEV_MAJOR,
};
#ifdef USING_DEVFS
static eventhandler_tag mixer_ehtag;
#endif
static dev_t
mixer_get_devt(device_t dev)
{
dev_t pdev;
int unit;
unit = device_get_unit(dev);
pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_CTL, 0));
return pdev;
}
#ifdef SND_DYNSYSCTL
static int
mixer_lookup(char *devname)
{
int i;
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
if (strncmp(devname, snd_mixernames[i],
strlen(snd_mixernames[i])) == 0)
return i;
return -1;
}
#endif
static int
mixer_set(struct snd_mixer *mixer, unsigned dev, unsigned lev)
{
unsigned l, r;
int v;
if ((dev >= SOUND_MIXER_NRDEVICES) || (0 == (mixer->devs & (1 << dev))))
return -1;
l = min((lev & 0x00ff), 100);
r = min(((lev & 0xff00) >> 8), 100);
v = MIXER_SET(mixer, dev, l, r);
if (v < 0)
return -1;
mixer->level[dev] = l | (r << 8);
return 0;
}
static int
mixer_get(struct snd_mixer *mixer, int dev)
{
if ((dev < SOUND_MIXER_NRDEVICES) && (mixer->devs & (1 << dev)))
return mixer->level[dev];
else return -1;
}
static int
mixer_setrecsrc(struct snd_mixer *mixer, u_int32_t src)
{
src &= mixer->recdevs;
if (src == 0)
src = SOUND_MASK_MIC;
mixer->recsrc = MIXER_SETRECSRC(mixer, src);
return 0;
}
static int
mixer_getrecsrc(struct snd_mixer *mixer)
{
return mixer->recsrc;
}
void
mix_setdevs(struct snd_mixer *m, u_int32_t v)
{
m->devs = v;
}
void
mix_setrecdevs(struct snd_mixer *m, u_int32_t v)
{
m->recdevs = v;
}
u_int32_t
mix_getdevs(struct snd_mixer *m)
{
return m->devs;
}
u_int32_t
mix_getrecdevs(struct snd_mixer *m)
{
return m->recdevs;
}
void *
mix_getdevinfo(struct snd_mixer *m)
{
return m->devinfo;
}
int
mixer_init(device_t dev, kobj_class_t cls, void *devinfo)
{
struct snd_mixer *m;
u_int16_t v;
dev_t pdev;
int i, unit;
m = (struct snd_mixer *)kobj_create(cls, M_MIXER, M_WAITOK | M_ZERO);
snprintf(m->name, MIXER_NAMELEN, "%s:mixer", device_get_nameunit(dev));
m->lock = snd_mtxcreate(m->name, "pcm mixer");
m->type = cls->name;
m->devinfo = devinfo;
m->busy = 0;
if (MIXER_INIT(m))
goto bad;
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
v = snd_mixerdefaults[i];
mixer_set(m, i, v | (v << 8));
}
mixer_setrecsrc(m, SOUND_MASK_MIC);
unit = device_get_unit(dev);
pdev = make_dev(&mixer_cdevsw, PCMMKMINOR(unit, SND_DEV_CTL, 0),
UID_ROOT, GID_WHEEL, 0666, "mixer%d", unit);
pdev->si_drv1 = m;
return 0;
bad:
snd_mtxlock(m->lock);
snd_mtxfree(m->lock);
kobj_delete((kobj_t)m, M_MIXER);
return -1;
}
int
mixer_uninit(device_t dev)
{
int i;
struct snd_mixer *m;
dev_t pdev;
pdev = mixer_get_devt(dev);
m = pdev->si_drv1;
snd_mtxlock(m->lock);
if (m->busy) {
snd_mtxunlock(m->lock);
return EBUSY;
}
pdev->si_drv1 = NULL;
destroy_dev(pdev);
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
mixer_set(m, i, 0);
mixer_setrecsrc(m, SOUND_MASK_MIC);
MIXER_UNINIT(m);
snd_mtxfree(m->lock);
kobj_delete((kobj_t)m, M_MIXER);
return 0;
}
int
mixer_reinit(device_t dev)
{
struct snd_mixer *m;
dev_t pdev;
int i;
pdev = mixer_get_devt(dev);
m = pdev->si_drv1;
snd_mtxlock(m->lock);
i = MIXER_REINIT(m);
if (i) {
snd_mtxunlock(m->lock);
return i;
}
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
mixer_set(m, i, m->level[i]);
mixer_setrecsrc(m, m->recsrc);
snd_mtxunlock(m->lock);
return 0;
}
#ifdef SND_DYNSYSCTL
static int
sysctl_hw_snd_hwvol_mixer(SYSCTL_HANDLER_ARGS)
{
char devname[32];
int error, dev;
struct snd_mixer *m;
m = oidp->oid_arg1;
snd_mtxlock(m->lock);
strncpy(devname, snd_mixernames[m->hwvol_mixer], sizeof(devname));
snd_mtxunlock(m->lock);
error = sysctl_handle_string(oidp, &devname[0], sizeof(devname), req);
snd_mtxlock(m->lock);
if (error == 0 && req->newptr != NULL) {
dev = mixer_lookup(devname);
if (dev == -1) {
snd_mtxunlock(m->lock);
return EINVAL;
}
else if (dev != m->hwvol_mixer) {
m->hwvol_mixer = dev;
m->hwvol_muted = 0;
}
}
snd_mtxunlock(m->lock);
return error;
}
#endif
int
mixer_hwvol_init(device_t dev)
{
struct snd_mixer *m;
dev_t pdev;
pdev = mixer_get_devt(dev);
m = pdev->si_drv1;
snd_mtxlock(m->lock);
m->hwvol_mixer = SOUND_MIXER_VOLUME;
m->hwvol_step = 5;
#ifdef SND_DYNSYSCTL
SYSCTL_ADD_INT(snd_sysctl_tree(dev), SYSCTL_CHILDREN(snd_sysctl_tree_top(dev)),
OID_AUTO, "hwvol_step", CTLFLAG_RW, &m->hwvol_step, 0, "");
SYSCTL_ADD_PROC(snd_sysctl_tree(dev), SYSCTL_CHILDREN(snd_sysctl_tree_top(dev)),
OID_AUTO, "hwvol_mixer", CTLTYPE_STRING | CTLFLAG_RW, m, 0,
sysctl_hw_snd_hwvol_mixer, "A", "");
#endif
snd_mtxunlock(m->lock);
return 0;
}
void
mixer_hwvol_mute(device_t dev)
{
struct snd_mixer *m;
dev_t pdev;
pdev = mixer_get_devt(dev);
m = pdev->si_drv1;
snd_mtxlock(m->lock);
if (m->hwvol_muted) {
m->hwvol_muted = 0;
mixer_set(m, m->hwvol_mixer, m->hwvol_mute_level);
} else {
m->hwvol_muted++;
m->hwvol_mute_level = mixer_get(m, m->hwvol_mixer);
mixer_set(m, m->hwvol_mixer, 0);
}
snd_mtxunlock(m->lock);
}
void
mixer_hwvol_step(device_t dev, int left_step, int right_step)
{
struct snd_mixer *m;
int level, left, right;
dev_t pdev;
pdev = mixer_get_devt(dev);
m = pdev->si_drv1;
snd_mtxlock(m->lock);
if (m->hwvol_muted) {
m->hwvol_muted = 0;
level = m->hwvol_mute_level;
} else
level = mixer_get(m, m->hwvol_mixer);
if (level != -1) {
left = level & 0xff;
right = level >> 8;
left += left_step * m->hwvol_step;
if (left < 0)
left = 0;
right += right_step * m->hwvol_step;
if (right < 0)
right = 0;
mixer_set(m, m->hwvol_mixer, left | right << 8);
}
snd_mtxunlock(m->lock);
}
/* ----------------------------------------------------------------------- */
static int
mixer_open(dev_t i_dev, int flags, int mode, struct thread *td)
{
struct snd_mixer *m;
intrmask_t s;
m = i_dev->si_drv1;
s = spltty();
snd_mtxlock(m->lock);
m->busy++;
snd_mtxunlock(m->lock);
splx(s);
return 0;
}
static int
mixer_close(dev_t i_dev, int flags, int mode, struct thread *td)
{
struct snd_mixer *m;
intrmask_t s;
m = i_dev->si_drv1;
s = spltty();
snd_mtxlock(m->lock);
if (!m->busy) {
snd_mtxunlock(m->lock);
splx(s);
return EBADF;
}
m->busy--;
snd_mtxunlock(m->lock);
splx(s);
return 0;
}
int
mixer_ioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct thread *td)
{
struct snd_mixer *m;
intrmask_t s;
int ret, *arg_i = (int *)arg;
int v = -1, j = cmd & 0xff;
m = i_dev->si_drv1;
if (!m->busy)
return EBADF;
s = spltty();
snd_mtxlock(m->lock);
if ((cmd & MIXER_WRITE(0)) == MIXER_WRITE(0)) {
if (j == SOUND_MIXER_RECSRC)
ret = mixer_setrecsrc(m, *arg_i);
else
ret = mixer_set(m, j, *arg_i);
snd_mtxunlock(m->lock);
splx(s);
return (ret == 0)? 0 : ENXIO;
}
if ((cmd & MIXER_READ(0)) == MIXER_READ(0)) {
switch (j) {
case SOUND_MIXER_DEVMASK:
case SOUND_MIXER_CAPS:
case SOUND_MIXER_STEREODEVS:
v = mix_getdevs(m);
break;
case SOUND_MIXER_RECMASK:
v = mix_getrecdevs(m);
break;
case SOUND_MIXER_RECSRC:
v = mixer_getrecsrc(m);
break;
default:
v = mixer_get(m, j);
}
*arg_i = v;
snd_mtxunlock(m->lock);
return (v != -1)? 0 : ENXIO;
}
snd_mtxunlock(m->lock);
splx(s);
return ENXIO;
}
#ifdef USING_DEVFS
static void
mixer_clone(void *arg, char *name, int namelen, dev_t *dev)
{
dev_t pdev;
if (*dev != NODEV)
return;
if (strcmp(name, "mixer") == 0) {
pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(snd_unit, SND_DEV_CTL, 0));
if (pdev->si_flags & SI_NAMED)
*dev = pdev;
}
}
static void
mixer_sysinit(void *p)
{
mixer_ehtag = EVENTHANDLER_REGISTER(dev_clone, mixer_clone, 0, 1000);
}
static void
mixer_sysuninit(void *p)
{
if (mixer_ehtag != NULL)
EVENTHANDLER_DEREGISTER(dev_clone, mixer_ehtag);
}
SYSINIT(mixer_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, mixer_sysinit, NULL);
SYSUNINIT(mixer_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, mixer_sysuninit, NULL);
#endif