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ASoC: TWL4030: Add helper function for output gain controls

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Some of the gain controls in TWL (mostly those which are associated with
the outputs) are implemented in an interesting way:
 0x0 : Power down (mute)
 0x1 : 6dB
 0x2 : 0 dB
 0x3 : -6 dB
Inverting not going to help with these.
Custom volsw and volsw_2r get/put functions to handle these gains.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Peter Ujfalusi 2008-11-24 13:49:38 +02:00 committed by Mark Brown
parent 0d33ea0b0f
commit b0bd53a739
1 changed files with 157 additions and 0 deletions
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157
sound/soc/codecs/twl4030.c
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@ -190,6 +190,163 @@ static void twl4030_init_chip(struct snd_soc_codec *codec)
}
/*
* Some of the gain controls in TWL (mostly those which are associated with
* the outputs) are implemented in an interesting way:
* 0x0 : Power down (mute)
* 0x1 : 6dB
* 0x2 : 0 dB
* 0x3 : -6 dB
* Inverting not going to help with these.
* Custom volsw and volsw_2r get/put functions to handle these gain bits.
*/
#define SOC_DOUBLE_TLV_TWL4030(xname, xreg, shift_left, shift_right, xmax,\
xinvert, tlv_array) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
.access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
SNDRV_CTL_ELEM_ACCESS_READWRITE,\
.tlv.p = (tlv_array), \
.info = snd_soc_info_volsw, \
.get = snd_soc_get_volsw_twl4030, \
.put = snd_soc_put_volsw_twl4030, \
.private_value = (unsigned long)&(struct soc_mixer_control) \
{.reg = xreg, .shift = shift_left, .rshift = shift_right,\
.max = xmax, .invert = xinvert} }
#define SOC_DOUBLE_R_TLV_TWL4030(xname, reg_left, reg_right, xshift, xmax,\
xinvert, tlv_array) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
.access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
SNDRV_CTL_ELEM_ACCESS_READWRITE,\
.tlv.p = (tlv_array), \
.info = snd_soc_info_volsw_2r, \
.get = snd_soc_get_volsw_r2_twl4030,\
.put = snd_soc_put_volsw_r2_twl4030, \
.private_value = (unsigned long)&(struct soc_mixer_control) \
{.reg = reg_left, .rreg = reg_right, .shift = xshift, \
.max = xmax, .invert = xinvert} }
#define SOC_SINGLE_TLV_TWL4030(xname, xreg, xshift, xmax, xinvert, tlv_array) \
SOC_DOUBLE_TLV_TWL4030(xname, xreg, xshift, xshift, xmax, \
xinvert, tlv_array)
static int snd_soc_get_volsw_twl4030(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
unsigned int reg = mc->reg;
unsigned int shift = mc->shift;
unsigned int rshift = mc->rshift;
int max = mc->max;
int mask = (1 << fls(max)) - 1;
ucontrol->value.integer.value[0] =
(snd_soc_read(codec, reg) >> shift) & mask;
if (ucontrol->value.integer.value[0])
ucontrol->value.integer.value[0] =
max + 1 - ucontrol->value.integer.value[0];
if (shift != rshift) {
ucontrol->value.integer.value[1] =
(snd_soc_read(codec, reg) >> rshift) & mask;
if (ucontrol->value.integer.value[1])
ucontrol->value.integer.value[1] =
max + 1 - ucontrol->value.integer.value[1];
}
return 0;
}
static int snd_soc_put_volsw_twl4030(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
unsigned int reg = mc->reg;
unsigned int shift = mc->shift;
unsigned int rshift = mc->rshift;
int max = mc->max;
int mask = (1 << fls(max)) - 1;
unsigned short val, val2, val_mask;
val = (ucontrol->value.integer.value[0] & mask);
val_mask = mask << shift;
if (val)
val = max + 1 - val;
val = val << shift;
if (shift != rshift) {
val2 = (ucontrol->value.integer.value[1] & mask);
val_mask |= mask << rshift;
if (val2)
val2 = max + 1 - val2;
val |= val2 << rshift;
}
return snd_soc_update_bits(codec, reg, val_mask, val);
}
static int snd_soc_get_volsw_r2_twl4030(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
unsigned int reg = mc->reg;
unsigned int reg2 = mc->rreg;
unsigned int shift = mc->shift;
int max = mc->max;
int mask = (1<<fls(max))-1;
ucontrol->value.integer.value[0] =
(snd_soc_read(codec, reg) >> shift) & mask;
ucontrol->value.integer.value[1] =
(snd_soc_read(codec, reg2) >> shift) & mask;
if (ucontrol->value.integer.value[0])
ucontrol->value.integer.value[0] =
max + 1 - ucontrol->value.integer.value[0];
if (ucontrol->value.integer.value[1])
ucontrol->value.integer.value[1] =
max + 1 - ucontrol->value.integer.value[1];
return 0;
}
static int snd_soc_put_volsw_r2_twl4030(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
unsigned int reg = mc->reg;
unsigned int reg2 = mc->rreg;
unsigned int shift = mc->shift;
int max = mc->max;
int mask = (1 << fls(max)) - 1;
int err;
unsigned short val, val2, val_mask;
val_mask = mask << shift;
val = (ucontrol->value.integer.value[0] & mask);
val2 = (ucontrol->value.integer.value[1] & mask);
if (val)
val = max + 1 - val;
if (val2)
val2 = max + 1 - val2;
val = val << shift;
val2 = val2 << shift;
err = snd_soc_update_bits(codec, reg, val_mask, val);
if (err < 0)
return err;
err = snd_soc_update_bits(codec, reg2, val_mask, val2);
return err;
}
/*
* FGAIN volume control:
* from -62 to 0 dB in 1 dB steps (mute instead of -63 dB)