/**
* Start the assigned ASRC pair
*
* It enables the assigned pair and makes it stopped at the stall level.
*/
static void fsl_asrc_start_pair(struct fsl_asrc_pair *pair)
{
struct fsl_asrc *asrc_priv = pair->asrc_priv;
enum asrc_pair_index index = pair->index;
int reg, retry = 10, i;
/* Enable the current pair */
regmap_update_bits(asrc_priv->regmap, REG_ASRCTR,
ASRCTR_ASRCEi_MASK(index), ASRCTR_ASRCE(index));
/* Wait for status of initialization */
do {
udelay(5);
regmap_read(asrc_priv->regmap, REG_ASRCFG, ®);
reg &= ASRCFG_INIRQi_MASK(index);
} while (!reg && --retry);
/* Make the input fifo to ASRC STALL level */
regmap_read(asrc_priv->regmap, REG_ASRCNCR, ®);
for (i = 0; i < pair->channels * 4; i++)
regmap_write(asrc_priv->regmap, REG_ASRDI(index), 0);
/* Enable overload interrupt */
regmap_write(asrc_priv->regmap, REG_ASRIER, ASRIER_AOLIE);
}
void asrc_start_conv(enum asrc_pair_index index)
{
int reg, retry, channels, i;
regmap_update_bits(asrc->regmap, REG_ASRCTR,
ASRCTR_ASRCEx_MASK(index), ASRCTR_ASRCE(index));
/* Wait for status of initialization */
for (retry = 10, reg = 0; !reg && retry; --retry) {
udelay(5);
regmap_read(asrc->regmap, REG_ASRCFG, ®);
reg &= ASRCFG_INIRQx_MASK(index);
}
/* Set the input fifo to ASRC STALL level */
regmap_read(asrc->regmap, REG_ASRCNCR, ®);
channels = ASRCNCR_ANCx_get(index, reg, asrc->channel_bits);
for (i = 0; i < channels * 4; i++)
regmap_write(asrc->regmap, REG_ASRDI(index), 0);
/* Overload Interrupt Enable */
regmap_write(asrc->regmap, REG_ASRIER, ASRIER_AOLIE);
}