static void jz_pcm_start_substream(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct device *dev = dai->dev;
PCM_DEBUG_MSG("enter %s, substream = %s\n",
__func__,
(substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? "playback" : "capture");
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
__pcm_enable_transmit_dma(dev);
__pcm_enable_replay(dev);
} else {
__pcm_enable_record(dev);
__pcm_enable_receive_dma(dev);
}
return;
}
static int pcm_dma_enable(int mode)
{
int val;
if (!pcm_priv)
return -ENODEV;
if (mode & CODEC_WMODE) {
__pcm_enable_underrun_intr();
__pcm_clear_tur();
__pcm_enable_transmit_dma();
__pcm_enable_replay();
}
if (mode & CODEC_RMODE) {
__pcm_flush_fifo();
__pcm_enable_record();
/* read the first sample and ignore it */
val = __pcm_read_fifo();
__pcm_enable_receive_dma();
}
// dump_pcm_reg();
return 0;
}