hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

ASoC: tpa6130a2: Support for limiting gain 

Add support for platform dependent gain limiting on the
tpa6130a2 (and tpa6140a2) Headset amplifier.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Peter Ujfalusi 2010-05-06 10:37:18 +03:00 committed by Liam Girdwood
parent 5193d62f18
commit 6f3991152f
2 changed files with 69 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/sound/tpa6130a2-plat.h
View File

@ -31,6 +31,7 @@ enum tpa_model {
struct tpa6130a2_platform_data {
enum tpa_model id;
int power_gpio;
int limit_gain;
};
#endif

76
sound/soc/codecs/tpa6130a2.c
View File

@ -46,6 +46,9 @@ static const char *tpa6140a2_supply_names[TPA6130A2_NUM_SUPPLIES] = {
"AVdd",
};
#define TPA6130A2_GAIN_MAX 0x3f
#define TPA6140A2_GAIN_MAX 0x1f
/* This struct is used to save the context */
struct tpa6130a2_data {
struct mutex mutex;
@ -54,6 +57,7 @@ struct tpa6130a2_data {
int power_gpio;
unsigned char power_state;
enum tpa_model id;
int gain_limit;
};
static int tpa6130a2_i2c_read(int reg)
@ -176,6 +180,40 @@ exit:
return ret;
}
static int tpa6130a2_info_volsw(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
struct tpa6130a2_data *data;
BUG_ON(tpa6130a2_client == NULL);
data = i2c_get_clientdata(tpa6130a2_client);
mutex_lock(&data->mutex);
switch (mc->reg) {
case TPA6130A2_REG_VOL_MUTE:
if (data->gain_limit != mc->max)
mc->max = data->gain_limit;
break;
default:
dev_err(&tpa6130a2_client->dev,
"Invalid register: 0x02%x\n", mc->reg);
goto out;
}
if (unlikely(mc->max == 1))
uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
else
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = mc->max;
out:
mutex_unlock(&data->mutex);
return 0;
}
static int tpa6130a2_get_reg(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
@ -239,6 +277,15 @@ static int tpa6130a2_set_reg(struct snd_kcontrol *kcontrol,
return 1;
}
#define SOC_SINGLE_EXT_TLV_TPA(xname, xreg, 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 = tpa6130a2_info_volsw, \
.get = tpa6130a2_get_reg, .put = tpa6130a2_set_reg, \
.private_value = SOC_SINGLE_VALUE(xreg, xshift, xmax, xinvert) }
/*
* TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
* down in gain.
@ -258,10 +305,9 @@ static const unsigned int tpa6130_tlv[] = {
};
static const struct snd_kcontrol_new tpa6130a2_controls[] = {
SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume",
TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
tpa6130a2_get_reg, tpa6130a2_set_reg,
tpa6130_tlv),
SOC_SINGLE_EXT_TLV_TPA("TPA6130A2 Headphone Playback Volume",
TPA6130A2_REG_VOL_MUTE, 0, TPA6130A2_GAIN_MAX, 0,
tpa6130_tlv),
};
static const unsigned int tpa6140_tlv[] = {
@ -272,10 +318,9 @@ static const unsigned int tpa6140_tlv[] = {
};
static const struct snd_kcontrol_new tpa6140a2_controls[] = {
SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume",
TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
tpa6130a2_get_reg, tpa6130a2_set_reg,
tpa6140_tlv),
SOC_SINGLE_EXT_TLV_TPA("TPA6140A2 Headphone Playback Volume",
TPA6130A2_REG_VOL_MUTE, 1, TPA6140A2_GAIN_MAX, 0,
tpa6140_tlv),
};
/*
@ -454,16 +499,31 @@ static int __devinit tpa6130a2_probe(struct i2c_client *client,
case TPA6130A2:
for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
data->supplies[i].supply = tpa6130a2_supply_names[i];
if (pdata->limit_gain > 0 &&
pdata->limit_gain < TPA6130A2_GAIN_MAX)
data->gain_limit = pdata->limit_gain;
else
data->gain_limit = TPA6130A2_GAIN_MAX;
break;
case TPA6140A2:
for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
data->supplies[i].supply = tpa6140a2_supply_names[i];;
if (pdata->limit_gain > 0 &&
pdata->limit_gain < TPA6140A2_GAIN_MAX)
data->gain_limit = pdata->limit_gain;
else
data->gain_limit = TPA6140A2_GAIN_MAX;
break;
default:
dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
pdata->id);
for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
data->supplies[i].supply = tpa6130a2_supply_names[i];
if (pdata->limit_gain > 0 &&
pdata->limit_gain < TPA6130A2_GAIN_MAX)
data->gain_limit = pdata->limit_gain;
else
data->gain_limit = TPA6130A2_GAIN_MAX;
}
ret = regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),