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authorLars-Peter Clausen <lars@metafoo.de>2013-04-20 19:29:07 +0200
committerMark Brown <broonie@opensource.wolfsonmicro.com>2013-05-12 22:01:41 +0400
commit52c102e534fd46a25aacab37bbaaa593929a2ca1 (patch)
tree174d9e238c18a2bda9f6753c639224d80a198579
parent46fdd8b11d4ab58af126344dcbc0bd565174db16 (diff)
downloadop-kernel-dev-52c102e534fd46a25aacab37bbaaa593929a2ca1.zip
op-kernel-dev-52c102e534fd46a25aacab37bbaaa593929a2ca1.tar.gz
ASoC: spear: 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>
-rw-r--r--sound/soc/spear/spear_pcm.c152
1 files changed, 15 insertions, 137 deletions
diff --git a/sound/soc/spear/spear_pcm.c b/sound/soc/spear/spear_pcm.c
index 2fbd489..4707f2b 100644
--- a/sound/soc/spear/spear_pcm.c
+++ b/sound/soc/spear/spear_pcm.c
@@ -13,19 +13,13 @@
#include <linux/module.h>
#include <linux/dmaengine.h>
-#include <linux/dma-mapping.h>
-#include <linux/init.h>
#include <linux/platform_device.h>
-#include <linux/scatterlist.h>
-#include <linux/slab.h>
-#include <sound/core.h>
#include <sound/dmaengine_pcm.h>
#include <sound/pcm.h>
-#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/spear_dma.h>
-static struct snd_pcm_hardware spear_pcm_hardware = {
+static const struct snd_pcm_hardware spear_pcm_hardware = {
.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
@@ -37,149 +31,33 @@ static struct snd_pcm_hardware spear_pcm_hardware = {
.fifo_size = 0, /* fifo size in bytes */
};
-static int spear_pcm_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
+static struct dma_chan *spear_pcm_request_chan(struct snd_soc_pcm_runtime *rtd,
+ struct snd_pcm_substream *substream)
{
- snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+ struct spear_dma_data *dma_data;
- return 0;
-}
-
-static int spear_pcm_hw_free(struct snd_pcm_substream *substream)
-{
- snd_pcm_set_runtime_buffer(substream, NULL);
-
- return 0;
-}
-
-static int spear_pcm_open(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
-
- struct spear_dma_data *dma_data = (struct spear_dma_data *)
- snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
- int ret;
-
- ret = snd_soc_set_runtime_hwparams(substream, &spear_pcm_hardware);
- if (ret)
- return ret;
+ dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
- return snd_dmaengine_pcm_open_request_chan(substream, dma_data->filter,
- dma_data);
+ return snd_dmaengine_pcm_request_channel(dma_data->filter, dma_data);
}
-static int spear_pcm_mmap(struct snd_pcm_substream *substream,
- struct vm_area_struct *vma)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
-
- return dma_mmap_writecombine(substream->pcm->card->dev, vma,
- runtime->dma_area, runtime->dma_addr,
- runtime->dma_bytes);
-}
-
-static struct snd_pcm_ops spear_pcm_ops = {
- .open = spear_pcm_open,
- .close = snd_dmaengine_pcm_close_release_chan,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = spear_pcm_hw_params,
- .hw_free = spear_pcm_hw_free,
- .trigger = snd_dmaengine_pcm_trigger,
- .pointer = snd_dmaengine_pcm_pointer,
- .mmap = spear_pcm_mmap,
-};
-
-static int
-spear_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream,
- size_t size)
-{
- struct snd_pcm_substream *substream = pcm->streams[stream].substream;
- struct snd_dma_buffer *buf = &substream->dma_buffer;
-
- buf->dev.type = SNDRV_DMA_TYPE_DEV;
- buf->dev.dev = pcm->card->dev;
- buf->private_data = NULL;
-
- buf->area = dma_alloc_writecombine(pcm->card->dev, size,
- &buf->addr, GFP_KERNEL);
- if (!buf->area)
- return -ENOMEM;
-
- dev_info(buf->dev.dev,
- " preallocate_dma_buffer: area=%p, addr=%p, size=%d\n",
- (void *)buf->area, (void *)buf->addr, size);
-
- buf->bytes = size;
- return 0;
-}
-
-static void spear_pcm_free(struct snd_pcm *pcm)
-{
- struct snd_pcm_substream *substream;
- struct snd_dma_buffer *buf;
- int stream;
-
- for (stream = 0; stream < 2; stream++) {
- substream = pcm->streams[stream].substream;
- if (!substream)
- continue;
-
- buf = &substream->dma_buffer;
- if (!buf || !buf->area)
- continue;
-
- dma_free_writecombine(pcm->card->dev, buf->bytes,
- buf->area, buf->addr);
- buf->area = NULL;
- }
-}
-
-static u64 spear_pcm_dmamask = DMA_BIT_MASK(32);
-
-static int spear_pcm_new(struct snd_soc_pcm_runtime *rtd)
-{
- struct snd_card *card = rtd->card->snd_card;
- int ret;
-
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &spear_pcm_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
-
- if (rtd->cpu_dai->driver->playback.channels_min) {
- ret = spear_pcm_preallocate_dma_buffer(rtd->pcm,
- SNDRV_PCM_STREAM_PLAYBACK,
- spear_pcm_hardware.buffer_bytes_max);
- if (ret)
- return ret;
- }
-
- if (rtd->cpu_dai->driver->capture.channels_min) {
- ret = spear_pcm_preallocate_dma_buffer(rtd->pcm,
- SNDRV_PCM_STREAM_CAPTURE,
- spear_pcm_hardware.buffer_bytes_max);
- if (ret)
- return ret;
- }
-
- return 0;
-}
-
-static struct snd_soc_platform_driver spear_soc_platform = {
- .ops = &spear_pcm_ops,
- .pcm_new = spear_pcm_new,
- .pcm_free = spear_pcm_free,
+static const struct snd_dmaengine_pcm_config spear_dmaengine_pcm_config = {
+ .pcm_hardware = &spear_pcm_hardware,
+ .compat_request_channel = spear_pcm_request_chan,
+ .prealloc_buffer_size = 16 * 1024,
};
static int spear_soc_platform_probe(struct platform_device *pdev)
{
- return snd_soc_register_platform(&pdev->dev, &spear_soc_platform);
+ return snd_dmaengine_pcm_register(&pdev->dev,
+ &spear_dmaengine_pcm_config,
+ SND_DMAENGINE_PCM_FLAG_NO_DT |
+ SND_DMAENGINE_PCM_FLAG_COMPAT);
}
static int spear_soc_platform_remove(struct platform_device *pdev)
{
- snd_soc_unregister_platform(&pdev->dev);
-
+ snd_dmaengine_pcm_unregister(&pdev->dev);
return 0;
}
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