static int ak5558_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
u8 bits;
int pcm_width = max(params_physical_width(params), ak5558->slot_width);
/* set master/slave audio interface */
bits = snd_soc_component_read32(component, AK5558_02_CONTROL1);
bits &= ~AK5558_BITS;
switch (pcm_width) {
case 16:
bits |= AK5558_DIF_24BIT_MODE;
break;
case 32:
bits |= AK5558_DIF_32BIT_MODE;
break;
default:
return -EINVAL;
}
snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_BITS, bits);
return 0;
}
/**
* snd_hwparams_to_dma_slave_config - Convert hw_params to dma_slave_config
* @substream: PCM substream
* @params: hw_params
* @slave_config: DMA slave config
*
* This function can be used to initialize a dma_slave_config from a substream
* and hw_params in a dmaengine based PCM driver implementation.
*/
int snd_hwparams_to_dma_slave_config(const struct snd_pcm_substream *substream,
const struct snd_pcm_hw_params *params,
struct dma_slave_config *slave_config)
{
enum dma_slave_buswidth buswidth;
int bits;
bits = params_physical_width(params);
if (bits < 8 || bits > 64)
return -EINVAL;
else if (bits == 8)
buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE;
else if (bits == 16)
buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
else if (bits == 24)
buswidth = DMA_SLAVE_BUSWIDTH_3_BYTES;
else if (bits <= 32)
buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
else
buswidth = DMA_SLAVE_BUSWIDTH_8_BYTES;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
slave_config->direction = DMA_MEM_TO_DEV;
slave_config->dst_addr_width = buswidth;
} else {
slave_config->direction = DMA_DEV_TO_MEM;
slave_config->src_addr_width = buswidth;
}
slave_config->device_fc = false;
return 0;
}
