ASoC: ep93xx-pcm: Use dmaengine PCM helper functions
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Vinod Koul <vinod.koul@linux.intel.com> Tested-by: Mika Westerberg <mika.westerberg@iki.fi> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Lars-Peter Clausen
Mark Brown
parent
7a08cf7022
commit
d7a42e1033
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@ -1,6 +1,7 @@
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config SND_EP93XX_SOC
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tristate "SoC Audio support for the Cirrus Logic EP93xx series"
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depends on ARCH_EP93XX && SND_SOC
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select SND_SOC_DMAENGINE_PCM
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help
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Say Y or M if you want to add support for codecs attached to
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the EP93xx I2S or AC97 interfaces.
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@ -23,6 +23,7 @@
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/dmaengine_pcm.h>
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#include <mach/dma.h>
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#include <mach/hardware.h>
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@ -52,26 +53,6 @@ static const struct snd_pcm_hardware ep93xx_pcm_hardware = {
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.fifo_size = 32,
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};
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struct ep93xx_runtime_data
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{
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int pointer_bytes;
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int periods;
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int period_bytes;
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struct dma_chan *dma_chan;
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struct ep93xx_dma_data dma_data;
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};
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static void ep93xx_pcm_dma_callback(void *data)
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{
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struct snd_pcm_substream *substream = data;
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struct ep93xx_runtime_data *rtd = substream->runtime->private_data;
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rtd->pointer_bytes += rtd->period_bytes;
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rtd->pointer_bytes %= rtd->period_bytes * rtd->periods;
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snd_pcm_period_elapsed(substream);
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}
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static bool ep93xx_pcm_dma_filter(struct dma_chan *chan, void *filter_param)
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{
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struct ep93xx_dma_data *data = filter_param;
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@ -86,98 +67,48 @@ static bool ep93xx_pcm_dma_filter(struct dma_chan *chan, void *filter_param)
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static int ep93xx_pcm_open(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *soc_rtd = substream->private_data;
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struct snd_soc_dai *cpu_dai = soc_rtd->cpu_dai;
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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struct ep93xx_pcm_dma_params *dma_params;
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struct ep93xx_runtime_data *rtd;
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dma_cap_mask_t mask;
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struct ep93xx_dma_data *dma_data;
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int ret;
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ret = snd_pcm_hw_constraint_integer(substream->runtime,
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SNDRV_PCM_HW_PARAM_PERIODS);
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if (ret < 0)
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return ret;
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snd_soc_set_runtime_hwparams(substream, &ep93xx_pcm_hardware);
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rtd = kmalloc(sizeof(*rtd), GFP_KERNEL);
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if (!rtd)
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dma_data = kmalloc(sizeof(*dma_data), GFP_KERNEL);
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if (!dma_data)
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return -ENOMEM;
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dma_cap_zero(mask);
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dma_cap_set(DMA_SLAVE, mask);
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dma_cap_set(DMA_CYCLIC, mask);
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dma_params = snd_soc_dai_get_dma_data(cpu_dai, substream);
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rtd->dma_data.port = dma_params->dma_port;
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rtd->dma_data.name = dma_params->name;
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dma_data->port = dma_params->dma_port;
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dma_data->name = dma_params->name;
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dma_data->direction = snd_pcm_substream_to_dma_direction(substream);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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rtd->dma_data.direction = DMA_MEM_TO_DEV;
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else
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rtd->dma_data.direction = DMA_DEV_TO_MEM;
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rtd->dma_chan = dma_request_channel(mask, ep93xx_pcm_dma_filter,
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&rtd->dma_data);
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if (!rtd->dma_chan) {
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kfree(rtd);
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return -EINVAL;
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ret = snd_dmaengine_pcm_open(substream, ep93xx_pcm_dma_filter, dma_data);
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if (ret) {
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kfree(dma_data);
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return ret;
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}
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substream->runtime->private_data = rtd;
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snd_dmaengine_pcm_set_data(substream, dma_data);
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return 0;
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}
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static int ep93xx_pcm_close(struct snd_pcm_substream *substream)
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{
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struct ep93xx_runtime_data *rtd = substream->runtime->private_data;
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struct dma_data *dma_data = snd_dmaengine_pcm_get_data(substream);
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dma_release_channel(rtd->dma_chan);
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kfree(rtd);
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snd_dmaengine_pcm_close(substream);
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kfree(dma_data);
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return 0;
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}
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static int ep93xx_pcm_dma_submit(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct ep93xx_runtime_data *rtd = runtime->private_data;
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struct dma_chan *chan = rtd->dma_chan;
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struct dma_device *dma_dev = chan->device;
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struct dma_async_tx_descriptor *desc;
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rtd->pointer_bytes = 0;
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desc = dma_dev->device_prep_dma_cyclic(chan, runtime->dma_addr,
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rtd->period_bytes * rtd->periods,
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rtd->period_bytes,
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rtd->dma_data.direction);
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if (!desc)
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return -EINVAL;
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desc->callback = ep93xx_pcm_dma_callback;
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desc->callback_param = substream;
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dmaengine_submit(desc);
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return 0;
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}
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static void ep93xx_pcm_dma_flush(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct ep93xx_runtime_data *rtd = runtime->private_data;
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dmaengine_terminate_all(rtd->dma_chan);
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}
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static int ep93xx_pcm_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct ep93xx_runtime_data *rtd = runtime->private_data;
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snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
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rtd->periods = params_periods(params);
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rtd->period_bytes = params_period_bytes(params);
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return 0;
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}
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@ -187,41 +118,6 @@ static int ep93xx_pcm_hw_free(struct snd_pcm_substream *substream)
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return 0;
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}
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static int ep93xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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int ret;
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ret = 0;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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ret = ep93xx_pcm_dma_submit(substream);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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ep93xx_pcm_dma_flush(substream);
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break;
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default:
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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static snd_pcm_uframes_t ep93xx_pcm_pointer(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct ep93xx_runtime_data *rtd = substream->runtime->private_data;
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/* FIXME: implement this with sub-period granularity */
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return bytes_to_frames(runtime, rtd->pointer_bytes);
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}
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static int ep93xx_pcm_mmap(struct snd_pcm_substream *substream,
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struct vm_area_struct *vma)
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{
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@ -239,8 +135,8 @@ static struct snd_pcm_ops ep93xx_pcm_ops = {
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = ep93xx_pcm_hw_params,
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.hw_free = ep93xx_pcm_hw_free,
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.trigger = ep93xx_pcm_trigger,
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.pointer = ep93xx_pcm_pointer,
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.trigger = snd_dmaengine_pcm_trigger,
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.pointer = snd_dmaengine_pcm_pointer,
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.mmap = ep93xx_pcm_mmap,
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};
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