ASoC: ep93xx: Use generic dmaengine PCM
Use the generic dmaengine PCM driver instead of a custom implementation. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Lars-Peter Clausen
Mark Brown
Родитель
785d81e29b
Коммит
e27e8a60cb
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@ -1,7 +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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select SND_SOC_GENERIC_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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@ -14,20 +14,14 @@
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/dmaengine.h>
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#include <linux/dma-mapping.h>
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#include <sound/core.h>
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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 <linux/platform_data/dma-ep93xx.h>
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#include <mach/hardware.h>
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#include <mach/ep93xx-regs.h>
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static const struct snd_pcm_hardware ep93xx_pcm_hardware = {
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.info = (SNDRV_PCM_INFO_MMAP |
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@ -63,134 +57,24 @@ static bool ep93xx_pcm_dma_filter(struct dma_chan *chan, void *filter_param)
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return false;
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}
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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 *rtd = substream->private_data;
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snd_soc_set_runtime_hwparams(substream, &ep93xx_pcm_hardware);
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return snd_dmaengine_pcm_open_request_chan(substream,
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ep93xx_pcm_dma_filter,
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snd_soc_dai_get_dma_data(rtd->cpu_dai, substream));
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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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snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
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return 0;
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}
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static int ep93xx_pcm_hw_free(struct snd_pcm_substream *substream)
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{
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snd_pcm_set_runtime_buffer(substream, NULL);
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return 0;
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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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struct snd_pcm_runtime *runtime = substream->runtime;
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return dma_mmap_writecombine(substream->pcm->card->dev, vma,
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runtime->dma_area,
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runtime->dma_addr,
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runtime->dma_bytes);
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}
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static struct snd_pcm_ops ep93xx_pcm_ops = {
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.open = ep93xx_pcm_open,
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.close = snd_dmaengine_pcm_close_release_chan,
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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 = snd_dmaengine_pcm_trigger,
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.pointer = snd_dmaengine_pcm_pointer_no_residue,
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.mmap = ep93xx_pcm_mmap,
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};
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static int ep93xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
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{
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struct snd_pcm_substream *substream = pcm->streams[stream].substream;
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struct snd_dma_buffer *buf = &substream->dma_buffer;
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size_t size = ep93xx_pcm_hardware.buffer_bytes_max;
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buf->dev.type = SNDRV_DMA_TYPE_DEV;
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buf->dev.dev = pcm->card->dev;
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buf->private_data = NULL;
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buf->area = dma_alloc_writecombine(pcm->card->dev, size,
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&buf->addr, GFP_KERNEL);
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buf->bytes = size;
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return (buf->area == NULL) ? -ENOMEM : 0;
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}
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static void ep93xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
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{
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struct snd_pcm_substream *substream;
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struct snd_dma_buffer *buf;
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int stream;
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for (stream = 0; stream < 2; stream++) {
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substream = pcm->streams[stream].substream;
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if (!substream)
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continue;
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buf = &substream->dma_buffer;
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if (!buf->area)
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continue;
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dma_free_writecombine(pcm->card->dev, buf->bytes, buf->area,
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buf->addr);
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buf->area = NULL;
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}
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}
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static u64 ep93xx_pcm_dmamask = DMA_BIT_MASK(32);
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static int ep93xx_pcm_new(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_card *card = rtd->card->snd_card;
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struct snd_pcm *pcm = rtd->pcm;
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int ret = 0;
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if (!card->dev->dma_mask)
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card->dev->dma_mask = &ep93xx_pcm_dmamask;
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if (!card->dev->coherent_dma_mask)
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card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
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if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
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ret = ep93xx_pcm_preallocate_dma_buffer(pcm,
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SNDRV_PCM_STREAM_PLAYBACK);
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if (ret)
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return ret;
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}
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if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
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ret = ep93xx_pcm_preallocate_dma_buffer(pcm,
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SNDRV_PCM_STREAM_CAPTURE);
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if (ret)
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return ret;
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}
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return 0;
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}
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static struct snd_soc_platform_driver ep93xx_soc_platform = {
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.ops = &ep93xx_pcm_ops,
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.pcm_new = &ep93xx_pcm_new,
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.pcm_free = &ep93xx_pcm_free_dma_buffers,
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static const struct snd_dmaengine_pcm_config ep93xx_dmaengine_pcm_config = {
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.pcm_hardware = &ep93xx_pcm_hardware,
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.compat_filter_fn = ep93xx_pcm_dma_filter,
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.prealloc_buffer_size = 131072,
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};
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static int ep93xx_soc_platform_probe(struct platform_device *pdev)
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{
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return snd_soc_register_platform(&pdev->dev, &ep93xx_soc_platform);
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return snd_dmaengine_pcm_register(&pdev->dev,
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&ep93xx_dmaengine_pcm_config,
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SND_DMAENGINE_PCM_FLAG_NO_RESIDUE |
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SND_DMAENGINE_PCM_FLAG_NO_DT |
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SND_DMAENGINE_PCM_FLAG_COMPAT);
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}
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static int ep93xx_soc_platform_remove(struct platform_device *pdev)
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{
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snd_soc_unregister_platform(&pdev->dev);
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snd_dmaengine_pcm_unregister(&pdev->dev);
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return 0;
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}
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