*
*/
-#include <linux/dma-mapping.h>
#include <linux/module.h>
-#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
static const struct snd_pcm_hardware tegra_pcm_hardware = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
- SNDRV_PCM_INFO_PAUSE |
- SNDRV_PCM_INFO_RESUME |
SNDRV_PCM_INFO_INTERLEAVED,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.channels_min = 2,
.fifo_size = 4,
};
-static int tegra_pcm_open(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct device *dev = rtd->platform->dev;
- int ret;
-
- /* Set HW params now that initialization is complete */
- snd_soc_set_runtime_hwparams(substream, &tegra_pcm_hardware);
-
- ret = snd_dmaengine_pcm_open(substream, NULL, NULL);
- if (ret) {
- dev_err(dev, "dmaengine pcm open failed with err %d\n", ret);
- return ret;
- }
-
- return 0;
-}
-
-static int tegra_pcm_close(struct snd_pcm_substream *substream)
-{
- snd_dmaengine_pcm_close(substream);
- return 0;
-}
-
-static int tegra_pcm_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct device *dev = rtd->platform->dev;
- struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
- struct tegra_pcm_dma_params *dmap;
- struct dma_slave_config slave_config;
- int ret;
-
- dmap = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
-
- ret = snd_hwparams_to_dma_slave_config(substream, params,
- &slave_config);
- if (ret) {
- dev_err(dev, "hw params config failed with err %d\n", ret);
- return ret;
- }
-
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- slave_config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
- slave_config.dst_addr = dmap->addr;
- slave_config.dst_maxburst = 4;
- } else {
- slave_config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
- slave_config.src_addr = dmap->addr;
- slave_config.src_maxburst = 4;
- }
- slave_config.slave_id = dmap->req_sel;
-
- ret = dmaengine_slave_config(chan, &slave_config);
- if (ret < 0) {
- dev_err(dev, "dma slave config failed with err %d\n", ret);
- return ret;
- }
-
- snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
- return 0;
-}
-
-static int tegra_pcm_hw_free(struct snd_pcm_substream *substream)
-{
- snd_pcm_set_runtime_buffer(substream, NULL);
- return 0;
-}
-
-static int tegra_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
-{
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- case SNDRV_PCM_TRIGGER_RESUME:
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- return snd_dmaengine_pcm_trigger(substream,
- SNDRV_PCM_TRIGGER_START);
-
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- return snd_dmaengine_pcm_trigger(substream,
- SNDRV_PCM_TRIGGER_STOP);
- default:
- return -EINVAL;
- }
- return 0;
-}
-
-static int tegra_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 tegra_pcm_ops = {
- .open = tegra_pcm_open,
- .close = tegra_pcm_close,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = tegra_pcm_hw_params,
- .hw_free = tegra_pcm_hw_free,
- .trigger = tegra_pcm_trigger,
- .pointer = snd_dmaengine_pcm_pointer,
- .mmap = tegra_pcm_mmap,
-};
-
-static int tegra_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
-{
- struct snd_pcm_substream *substream = pcm->streams[stream].substream;
- struct snd_dma_buffer *buf = &substream->dma_buffer;
- size_t size = tegra_pcm_hardware.buffer_bytes_max;
-
- buf->area = dma_alloc_writecombine(pcm->card->dev, size,
- &buf->addr, GFP_KERNEL);
- if (!buf->area)
- return -ENOMEM;
-
- buf->dev.type = SNDRV_DMA_TYPE_DEV;
- buf->dev.dev = pcm->card->dev;
- buf->private_data = NULL;
- buf->bytes = size;
-
- return 0;
-}
-
-static void tegra_pcm_deallocate_dma_buffer(struct snd_pcm *pcm, int stream)
-{
- struct snd_pcm_substream *substream;
- struct snd_dma_buffer *buf;
-
- substream = pcm->streams[stream].substream;
- if (!substream)
- return;
-
- buf = &substream->dma_buffer;
- if (!buf->area)
- return;
-
- dma_free_writecombine(pcm->card->dev, buf->bytes,
- buf->area, buf->addr);
- buf->area = NULL;
-}
-
-static u64 tegra_dma_mask = DMA_BIT_MASK(32);
-
-static int tegra_pcm_new(struct snd_soc_pcm_runtime *rtd)
-{
- struct snd_card *card = rtd->card->snd_card;
- struct snd_pcm *pcm = rtd->pcm;
- int ret = 0;
-
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &tegra_dma_mask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
-
- if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
- ret = tegra_pcm_preallocate_dma_buffer(pcm,
- SNDRV_PCM_STREAM_PLAYBACK);
- if (ret)
- goto err;
- }
-
- if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
- ret = tegra_pcm_preallocate_dma_buffer(pcm,
- SNDRV_PCM_STREAM_CAPTURE);
- if (ret)
- goto err_free_play;
- }
-
- return 0;
-
-err_free_play:
- tegra_pcm_deallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_PLAYBACK);
-err:
- return ret;
-}
-
-static void tegra_pcm_free(struct snd_pcm *pcm)
-{
- tegra_pcm_deallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_CAPTURE);
- tegra_pcm_deallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_PLAYBACK);
-}
-
-static struct snd_soc_platform_driver tegra_pcm_platform = {
- .ops = &tegra_pcm_ops,
- .pcm_new = tegra_pcm_new,
- .pcm_free = tegra_pcm_free,
+static const struct snd_dmaengine_pcm_config tegra_dmaengine_pcm_config = {
+ .pcm_hardware = &tegra_pcm_hardware,
+ .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+ .compat_filter_fn = NULL,
+ .prealloc_buffer_size = PAGE_SIZE * 8,
};
int tegra_pcm_platform_register(struct device *dev)
{
- return snd_soc_register_platform(dev, &tegra_pcm_platform);
+ return snd_dmaengine_pcm_register(dev, &tegra_dmaengine_pcm_config,
+ SND_DMAENGINE_PCM_FLAG_NO_DT |
+ SND_DMAENGINE_PCM_FLAG_COMPAT);
}
EXPORT_SYMBOL_GPL(tegra_pcm_platform_register);
void tegra_pcm_platform_unregister(struct device *dev)
{
- snd_soc_unregister_platform(dev);
+ return snd_dmaengine_pcm_unregister(dev);
}
EXPORT_SYMBOL_GPL(tegra_pcm_platform_unregister);
projects / cascardo / linux.git / blobdiff