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[media] em28xx-audio: add support for mute controls 

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2011-06-19 13:08:46 -03:00
parent 850d24a5a8
commit 43131a2ca6
1 changed files with 72 additions and 13 deletions
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85
drivers/media/video/em28xx/em28xx-audio.c
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@ -448,8 +448,6 @@ static int em28xx_vol_info(struct snd_kcontrol *kcontrol,
return 0;
}
/* FIXME: should also add mute controls for each */
static int em28xx_vol_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *value)
{
@ -463,7 +461,7 @@ static int em28xx_vol_put(struct snd_kcontrol *kcontrol,
if (rc < 0)
goto err;
val |= rc & 0x8080; /* Preserve the mute flags */
val |= rc & 0x8000; /* Preserve the mute flag */
rc = em28xx_write_ac97(dev, kcontrol->private_value, val);
@ -490,25 +488,87 @@ static int em28xx_vol_get(struct snd_kcontrol *kcontrol,
return 0;
}
static int em28xx_vol_put_mute(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *value)
{
struct em28xx *dev = snd_kcontrol_chip(kcontrol);
u16 val = value->value.integer.value[0];
int rc;
mutex_lock(&dev->lock);
rc = em28xx_read_ac97(dev, kcontrol->private_value);
if (rc < 0)
goto err;
if (val)
rc |= 0x8000;
else
rc &= 0x7f7f;
rc = em28xx_write_ac97(dev, kcontrol->private_value, rc);
err:
mutex_unlock(&dev->lock);
return rc;
}
static int em28xx_vol_get_mute(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *value)
{
struct em28xx *dev = snd_kcontrol_chip(kcontrol);
int val;
mutex_lock(&dev->lock);
val = em28xx_read_ac97(dev, kcontrol->private_value);
mutex_unlock(&dev->lock);
if (val < 0)
return val;
if (val & 0x8000)
value->value.integer.value[0] = 1;
else
value->value.integer.value[0] = 0;
return 0;
}
static const DECLARE_TLV_DB_SCALE(em28xx_db_scale, -3450, 150, 0);
static int em28xx_cvol_new(struct snd_card *card, struct em28xx *dev,
char *name, int id)
{
int err;
char ctl_name[44];
struct snd_kcontrol *kctl;
struct snd_kcontrol_new tmp = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = name,
.info = em28xx_vol_info,
.get = em28xx_vol_get,
.put = em28xx_vol_put,
.private_value = id,
.tlv.p = em28xx_db_scale,
};
struct snd_kcontrol_new tmp;
memset (&tmp, 0, sizeof(tmp));
tmp.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
tmp.private_value = id,
tmp.name = ctl_name,
/* Add Mute Control */
sprintf(ctl_name, "%s Switch", name);
tmp.get = em28xx_vol_get_mute;
tmp.put = em28xx_vol_put_mute;
tmp.info = snd_ctl_boolean_mono_info;
kctl = snd_ctl_new1(&tmp, dev);
err = snd_ctl_add(card, kctl);
if (err < 0)
return err;
memset (&tmp, 0, sizeof(tmp));
tmp.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
tmp.private_value = id,
tmp.name = ctl_name,
/* Add Volume Control */
sprintf(ctl_name, "%s Volume", name);
tmp.get = em28xx_vol_get;
tmp.put = em28xx_vol_put;
tmp.info = em28xx_vol_info;
tmp.tlv.p = em28xx_db_scale,
kctl = snd_ctl_new1(&tmp, dev);
err = snd_ctl_add(card, kctl);
if (err < 0)
return err;
@ -516,7 +576,6 @@ static int em28xx_cvol_new(struct snd_card *card, struct em28xx *dev,
return 0;
}
/*
* register/unregister code and data
*/