static int rockchip_pcm_prepare(struct snd_pcm_substream *substream)
{
struct rockchip_runtime_data *prtd = substream->runtime->private_data;
int ret = 0;
DBG("Enter::%s----%d\n",__FUNCTION__,__LINE__);
/* return if this is a bufferless transfer e.g.
* codec <--> BT codec or GSM modem -- lg FIXME */
if (!prtd->params)
return 0;
if(substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
ret = rk29_dma_devconfig(prtd->params->channel,
RK29_DMASRC_MEM,
prtd->params->dma_addr);
}else{
ret = rk29_dma_devconfig(prtd->params->channel,
RK29_DMASRC_HW,
prtd->params->dma_addr);
}
DBG("Enter::%s, %d, ret=%d, Channel=%d, Addr=0x%X\n", __FUNCTION__, __LINE__, ret, prtd->params->channel, prtd->params->dma_addr);
ret = rk29_dma_config(prtd->params->channel,
prtd->params->dma_size, 1);
prtd->params->flag = 1;
DBG("Enter:%s, %d, ret = %d, Channel=%d, Size=%d\n",
__FUNCTION__, __LINE__, ret, prtd->params->channel,
prtd->params->dma_size);
ret= rk29_dma_ctrl(prtd->params->channel, RK29_DMAOP_FLUSH);
DBG("Enter:%s, %d, ret = %d, Channel=%d\n",
__FUNCTION__, __LINE__, ret, prtd->params->channel);
prtd->dma_loaded = 0;
prtd->dma_pos = prtd->dma_start;
/* enqueue dma buffers */
rockchip_pcm_enqueue(substream);
return ret;
}
static ssize_t memcpy_dma_write(struct device *device, struct device_attribute *attr, const char *argv, size_t count)
{
int rt;
struct Dma_MemToMem *DmaMemInfo = (struct Dma_MemToMem *)argv;
rt = rk29_dma_devconfig(DMACH_DMAC0_MEMTOMEM, RK29_DMASRC_MEMTOMEM, DmaMemInfo->SrcAddr);
rt = rk29_dma_enqueue(DMACH_DMAC0_MEMTOMEM, NULL, DmaMemInfo->DstAddr, DmaMemInfo->MenSize);
rt = rk29_dma_ctrl(DMACH_DMAC0_MEMTOMEM, RK29_DMAOP_START);
wait_event_interruptible_timeout(wq, wq_condition, 200);
wq_condition = 0;
//init_waitqueue_head(&dma_memcpy_wait);
//interruptible_sleep_on(&dma_memcpy_wait);
return 0;
}
static int dma_start(struct rk_mmc *host)
{
int i, res, direction, sg_len;
enum rk29_dmasrc src;
struct mmc_data *data = host->data;
BUG_ON(!data);
host->dma_xfer_size = 0;
if (data->flags & MMC_DATA_READ){
direction = DMA_FROM_DEVICE;
src = RK29_DMASRC_HW;
}else{
direction = DMA_TO_DEVICE;
src = RK29_DMASRC_MEM;
}
sg_len = rk_mmc_pre_dma_transfer(host, host->data, 0);
if(sg_len < 0){
host->ops->stop(host);
return sg_len;
}
res = rk29_dma_devconfig(MMC_DMA_CHN, src, host->dma_addr);
if(unlikely(res < 0))
return res;
for(i = 0; i < sg_len; i++){
res = rk29_dma_enqueue(MMC_DMA_CHN, host,
sg_dma_address(&data->sg[i]),
sg_dma_len(&data->sg[i]));
if(unlikely(res < 0))
return res;
}
res = rk29_dma_ctrl(MMC_DMA_CHN, RK29_DMAOP_START);
if(unlikely(res < 0))
return res;
return res;
}
