static void jz_pcm_stop_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) {
if (__pcm_transmit_dma_is_enable(dev)) {
__pcm_disable_transmit_dma(dev);
__pcm_clear_tur(dev);
/* Hrtimer mode: stop will be happen in any where, make sure there is
* no data transfer on ahb bus before stop dma
* Harzard:
* In pcm slave mode, the clk maybe stop before here, we will dead here
*/
while(!__pcm_test_tur(dev));
}
__pcm_disable_replay(dev);
__pcm_clear_tur(dev);
} else {
if (__pcm_receive_dma_is_enable(dev)) {
__pcm_disable_receive_dma(dev);
__pcm_clear_ror(dev);
while(!__pcm_test_ror(dev));
}
__pcm_disable_record(dev);
__pcm_clear_ror(dev);
}
return;
}
/*##################################################################*\
|* functions
\*##################################################################*/
static irqreturn_t pcm_irq_handler(int irq, void *dev_id)
{
unsigned long flags;
irqreturn_t ret = IRQ_HANDLED;
spin_lock_irqsave(&pcm_irq_lock,flags);
if (__pcm_test_tur()) {
printk("UNDERRUN HAPPEN\n");
__pcm_clear_tur();
}
spin_unlock_irqrestore(&pcm_irq_lock,flags);
return ret;
}
