static int tas5086_probe(struct snd_soc_codec *codec)
{
struct tas5086_private *priv = snd_soc_codec_get_drvdata(codec);
int charge_period = 1300000; /* hardware default is 1300 ms */
int i, ret;
if (of_match_device(of_match_ptr(tas5086_dt_ids), codec->dev)) {
struct device_node *of_node = codec->dev->of_node;
of_property_read_u32(of_node, "ti,charge-period", &charge_period);
}
/* lookup and set split-capacitor charge period */
if (charge_period == 0) {
regmap_write(priv->regmap, TAS5086_SPLIT_CAP_CHARGE, 0);
} else {
i = index_in_array(tas5086_charge_period,
ARRAY_SIZE(tas5086_charge_period),
charge_period);
if (i >= 0)
regmap_write(priv->regmap, TAS5086_SPLIT_CAP_CHARGE,
i + 0x08);
else
dev_warn(codec->dev,
"Invalid split-cap charge period of %d ns.\n",
charge_period);
}
/* enable factory trim */
ret = regmap_write(priv->regmap, TAS5086_OSC_TRIM, 0x00);
if (ret < 0)
return ret;
/* start all channels */
ret = regmap_write(priv->regmap, TAS5086_SYS_CONTROL_2, 0x20);
if (ret < 0)
return ret;
/* set master volume to 0 dB */
ret = regmap_write(priv->regmap, TAS5086_MASTER_VOL, 0x30);
if (ret < 0)
return ret;
/* mute all channels for now */
ret = regmap_write(priv->regmap, TAS5086_SOFT_MUTE,
TAS5086_SOFT_MUTE_ALL);
if (ret < 0)
return ret;
return 0;
}
static int tas5086_init(struct device *dev, struct tas5086_private *priv)
{
int ret, i;
/*
* If any of the channels is configured to start in Mid-Z mode,
* configure 'part 1' of the PWM starts to use Mid-Z, and tell
* all configured mid-z channels to start start under 'part 1'.
*/
if (priv->pwm_start_mid_z)
regmap_write(priv->regmap, TAS5086_PWM_START,
TAS5086_PWM_START_MIDZ_FOR_START_1 |
priv->pwm_start_mid_z);
/* lookup and set split-capacitor charge period */
if (priv->charge_period == 0) {
regmap_write(priv->regmap, TAS5086_SPLIT_CAP_CHARGE, 0);
} else {
i = index_in_array(tas5086_charge_period,
ARRAY_SIZE(tas5086_charge_period),
priv->charge_period);
if (i >= 0)
regmap_write(priv->regmap, TAS5086_SPLIT_CAP_CHARGE,
i + 0x08);
else
dev_warn(dev,
"Invalid split-cap charge period of %d ns.\n",
priv->charge_period);
}
/* enable factory trim */
ret = regmap_write(priv->regmap, TAS5086_OSC_TRIM, 0x00);
if (ret < 0)
return ret;
/* start all channels */
ret = regmap_write(priv->regmap, TAS5086_SYS_CONTROL_2, 0x20);
if (ret < 0)
return ret;
/* mute all channels for now */
ret = regmap_write(priv->regmap, TAS5086_SOFT_MUTE,
TAS5086_SOFT_MUTE_ALL);
if (ret < 0)
return ret;
return 0;
}
static int tas5086_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
struct tas5086_private *priv = snd_soc_codec_get_drvdata(codec);
int val;
int ret;
priv->rate = params_rate(params);
/* Look up the sample rate and refer to the offset in the list */
val = index_in_array(tas5086_sample_rates,
ARRAY_SIZE(tas5086_sample_rates), priv->rate);
if (val < 0) {
dev_err(codec->dev, "Invalid sample rate\n");
return -EINVAL;
}
ret = regmap_update_bits(priv->regmap, TAS5086_CLOCK_CONTROL,
TAS5086_CLOCK_RATE_MASK,
TAS5086_CLOCK_RATE(val));
if (ret < 0)
return ret;
/* MCLK / Fs ratio */
val = index_in_array(tas5086_ratios, ARRAY_SIZE(tas5086_ratios),
priv->mclk / priv->rate);
if (val < 0) {
dev_err(codec->dev, "Inavlid MCLK / Fs ratio\n");
return -EINVAL;
}
ret = regmap_update_bits(priv->regmap, TAS5086_CLOCK_CONTROL,
TAS5086_CLOCK_RATIO_MASK,
TAS5086_CLOCK_RATIO(val));
if (ret < 0)
return ret;
ret = regmap_update_bits(priv->regmap, TAS5086_CLOCK_CONTROL,
TAS5086_CLOCK_SCLK_RATIO_48,
(priv->sclk == 48 * priv->rate) ?
TAS5086_CLOCK_SCLK_RATIO_48 : 0);
if (ret < 0)
return ret;
/*
* The chip has a very unituitive register mapping and muxes information
* about data format and sample depth into the same register, but not on
* a logical bit-boundary. Hence, we have to refer to the format passed
* in the set_dai_fmt() callback and set up everything from here.
*
* First, determine the 'base' value, using the format ...
*/
switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_RIGHT_J:
val = 0x00;
break;
case SND_SOC_DAIFMT_I2S:
val = 0x03;
break;
case SND_SOC_DAIFMT_LEFT_J:
val = 0x06;
break;
default:
dev_err(codec->dev, "Invalid DAI format\n");
return -EINVAL;
}
/* ... then add the offset for the sample bit depth. */
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
val += 0;
break;
case SNDRV_PCM_FORMAT_S20_3LE:
val += 1;
break;
case SNDRV_PCM_FORMAT_S24_3LE:
val += 2;
break;
default:
dev_err(codec->dev, "Invalid bit width\n");
return -EINVAL;
}
ret = regmap_write(priv->regmap, TAS5086_SERIAL_DATA_IF, val);
if (ret < 0)
return ret;
/* clock is considered valid now */
ret = regmap_update_bits(priv->regmap, TAS5086_CLOCK_CONTROL,
TAS5086_CLOCK_VALID, TAS5086_CLOCK_VALID);
if (ret < 0)
return ret;
return tas5086_set_deemph(codec);
}
