static int sun4i_pcm_prepare(struct snd_pcm_substream *substream)
{
struct sun4i_runtime_data *prtd = substream->runtime->private_data;
struct dma_hw_conf codec_dma_conf;
int ret = 0;
if (!prtd->params)
return 0;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK){
codec_dma_conf.drqsrc_type = DRQ_TYPE_SDRAM;
codec_dma_conf.drqdst_type = DRQ_TYPE_IIS;
codec_dma_conf.xfer_type = DMAXFER_D_BHALF_S_BHALF;
codec_dma_conf.address_type = DMAADDRT_D_FIX_S_INC;
codec_dma_conf.dir = SW_DMA_WDEV;
codec_dma_conf.reload = 0;
codec_dma_conf.hf_irq = SW_DMA_IRQ_FULL;
codec_dma_conf.from = prtd->dma_start;
codec_dma_conf.to = prtd->params->dma_addr;
ret = sw_dma_config(prtd->params->channel, &codec_dma_conf);
}
/* flush the DMA channel */
sw_dma_ctrl(prtd->params->channel, SW_DMAOP_FLUSH);
prtd->dma_loaded = 0;
prtd->dma_pos = prtd->dma_start;
/* enqueue dma buffers */
sun4i_pcm_enqueue(substream);
return ret;
}
static void sun4i_audio_buffdone(struct sw_dma_chan *channel,
void *dev_id, int size,
enum sw_dma_buffresult result)
{
struct sun4i_runtime_data *prtd;
struct snd_pcm_substream *substream = dev_id;
if (result == SW_RES_ABORT || result == SW_RES_ERR)
return;
prtd = substream->runtime->private_data;
if (substream) {
snd_pcm_period_elapsed(substream);
}
spin_lock(&prtd->lock);
{
prtd->dma_loaded--;
sun4i_pcm_enqueue(substream);
}
spin_unlock(&prtd->lock);
}
static int sun4i_pcm_prepare(struct snd_pcm_substream *substream)
{
struct sun4i_runtime_data *prtd = substream->runtime->private_data;
struct dma_hw_conf codec_dma_conf;
int ret = 0;
// codec_dma_conf = kmalloc(sizeof(struct dma_hw_conf), GFP_KERNEL);
// if (!codec_dma_conf)
// {
// ret = - ENOMEM;
// return ret;
// }
if (!prtd->params)
return 0;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK){
codec_dma_conf.drqsrc_type = DRQ_TYPE_SDRAM;
codec_dma_conf.drqdst_type = DRQ_TYPE_HDMIAUDIO;
codec_dma_conf.xfer_type = DMAXFER_D_BWORD_S_BWORD;
codec_dma_conf.address_type = DMAADDRT_D_IO_S_LN;
codec_dma_conf.dir = SW_DMA_WDEV;
codec_dma_conf.reload = 0;
codec_dma_conf.hf_irq = SW_DMA_IRQ_FULL;
codec_dma_conf.from = prtd->dma_start;
codec_dma_conf.to = prtd->params->dma_addr;
codec_dma_conf.cmbk = 0x1F071F07;
ret = sw_dma_config(prtd->params->channel, &codec_dma_conf);
}
/* flush the DMA channel */
sw_dma_ctrl(prtd->params->channel, SW_DMAOP_FLUSH);
prtd->dma_loaded = 0;
prtd->dma_pos = prtd->dma_start;
/* enqueue dma buffers */
sun4i_pcm_enqueue(substream);
return ret;
}
