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path: root/sound/soc/atmel/atmel-pcm-dma.c
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Diffstat (limited to 'sound/soc/atmel/atmel-pcm-dma.c')
-rw-r--r--sound/soc/atmel/atmel-pcm-dma.c120
1 files changed, 18 insertions, 102 deletions
diff --git a/sound/soc/atmel/atmel-pcm-dma.c b/sound/soc/atmel/atmel-pcm-dma.c
index 1d38fd0bc4e2..06082e5e5dcb 100644
--- a/sound/soc/atmel/atmel-pcm-dma.c
+++ b/sound/soc/atmel/atmel-pcm-dma.c
@@ -81,7 +81,9 @@ static void atmel_pcm_dma_irq(u32 ssc_sr,
/* stop RX and capture: will be enabled again at restart */
ssc_writex(prtd->ssc->regs, SSC_CR, prtd->mask->ssc_disable);
+ snd_pcm_stream_lock(substream);
snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
+ snd_pcm_stream_unlock(substream);
/* now drain RHR and read status to remove xrun condition */
ssc_readx(prtd->ssc->regs, SSC_RHR);
@@ -89,138 +91,52 @@ static void atmel_pcm_dma_irq(u32 ssc_sr,
}
}
-/*--------------------------------------------------------------------------*\
- * DMAENGINE operations
-\*--------------------------------------------------------------------------*/
-static bool filter(struct dma_chan *chan, void *slave)
-{
- struct at_dma_slave *sl = slave;
-
- if (sl->dma_dev == chan->device->dev) {
- chan->private = sl;
- return true;
- } else {
- return false;
- }
-}
-
static int atmel_pcm_configure_dma(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params, struct atmel_pcm_dma_params *prtd)
+ struct snd_pcm_hw_params *params, struct dma_slave_config *slave_config)
{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct atmel_pcm_dma_params *prtd;
struct ssc_device *ssc;
- struct dma_chan *dma_chan;
- struct dma_slave_config slave_config;
int ret;
+ prtd = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
ssc = prtd->ssc;
- ret = snd_hwparams_to_dma_slave_config(substream, params,
- &slave_config);
+ ret = snd_hwparams_to_dma_slave_config(substream, params, slave_config);
if (ret) {
pr_err("atmel-pcm: hwparams to dma slave configure failed\n");
return ret;
}
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- slave_config.dst_addr = (dma_addr_t)ssc->phybase + SSC_THR;
- slave_config.dst_maxburst = 1;
+ slave_config->dst_addr = ssc->phybase + SSC_THR;
+ slave_config->dst_maxburst = 1;
} else {
- slave_config.src_addr = (dma_addr_t)ssc->phybase + SSC_RHR;
- slave_config.src_maxburst = 1;
- }
-
- dma_chan = snd_dmaengine_pcm_get_chan(substream);
- if (dmaengine_slave_config(dma_chan, &slave_config)) {
- pr_err("atmel-pcm: failed to configure dma channel\n");
- ret = -EBUSY;
- return ret;
- }
-
- return 0;
-}
-
-static int atmel_pcm_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct atmel_pcm_dma_params *prtd;
- struct ssc_device *ssc;
- struct at_dma_slave *sdata = NULL;
- int ret;
-
- snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
-
- prtd = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
- ssc = prtd->ssc;
- if (ssc->pdev)
- sdata = ssc->pdev->dev.platform_data;
-
- ret = snd_dmaengine_pcm_open_request_chan(substream, filter, sdata);
- if (ret) {
- pr_err("atmel-pcm: dmaengine pcm open failed\n");
- return -EINVAL;
- }
-
- ret = atmel_pcm_configure_dma(substream, params, prtd);
- if (ret) {
- pr_err("atmel-pcm: failed to configure dmai\n");
- goto err;
+ slave_config->src_addr = ssc->phybase + SSC_RHR;
+ slave_config->src_maxburst = 1;
}
prtd->dma_intr_handler = atmel_pcm_dma_irq;
return 0;
-err:
- snd_dmaengine_pcm_close_release_chan(substream);
- return ret;
}
-static int atmel_pcm_dma_prepare(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct atmel_pcm_dma_params *prtd;
-
- prtd = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
-
- ssc_writex(prtd->ssc->regs, SSC_IER, prtd->mask->ssc_error);
- ssc_writex(prtd->ssc->regs, SSC_CR, prtd->mask->ssc_enable);
-
- return 0;
-}
-
-static int atmel_pcm_open(struct snd_pcm_substream *substream)
-{
- snd_soc_set_runtime_hwparams(substream, &atmel_pcm_dma_hardware);
-
- return 0;
-}
-
-static struct snd_pcm_ops atmel_pcm_ops = {
- .open = atmel_pcm_open,
- .close = snd_dmaengine_pcm_close_release_chan,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = atmel_pcm_hw_params,
- .prepare = atmel_pcm_dma_prepare,
- .trigger = snd_dmaengine_pcm_trigger,
- .pointer = snd_dmaengine_pcm_pointer_no_residue,
- .mmap = atmel_pcm_mmap,
-};
-
-static struct snd_soc_platform_driver atmel_soc_platform = {
- .ops = &atmel_pcm_ops,
- .pcm_new = atmel_pcm_new,
- .pcm_free = atmel_pcm_free,
+static const struct snd_dmaengine_pcm_config atmel_dmaengine_pcm_config = {
+ .prepare_slave_config = atmel_pcm_configure_dma,
+ .pcm_hardware = &atmel_pcm_dma_hardware,
+ .prealloc_buffer_size = ATMEL_SSC_DMABUF_SIZE,
};
int atmel_pcm_dma_platform_register(struct device *dev)
{
- return snd_soc_register_platform(dev, &atmel_soc_platform);
+ return snd_dmaengine_pcm_register(dev, &atmel_dmaengine_pcm_config,
+ SND_DMAENGINE_PCM_FLAG_NO_RESIDUE);
}
EXPORT_SYMBOL(atmel_pcm_dma_platform_register);
void atmel_pcm_dma_platform_unregister(struct device *dev)
{
- snd_soc_unregister_platform(dev);
+ snd_dmaengine_pcm_unregister(dev);
}
EXPORT_SYMBOL(atmel_pcm_dma_platform_unregister);