#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
#include "mxs-pcm.h"
+struct mxs_pcm_dma_data {
+ struct mxs_dma_data dma_data;
+ struct mxs_pcm_dma_params *dma_params;
+};
+
static struct snd_pcm_hardware snd_mxs_hardware = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
};
-static void audio_dma_irq(void *data)
-{
- struct snd_pcm_substream *substream = (struct snd_pcm_substream *)data;
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct mxs_pcm_runtime_data *iprtd = runtime->private_data;
-
- iprtd->offset += iprtd->period_bytes;
- iprtd->offset %= iprtd->period_bytes * iprtd->periods;
- snd_pcm_period_elapsed(substream);
-}
-
static bool filter(struct dma_chan *chan, void *param)
{
- struct mxs_pcm_runtime_data *iprtd = param;
- struct mxs_pcm_dma_params *dma_params = iprtd->dma_params;
+ struct mxs_pcm_dma_data *pcm_dma_data = param;
+ struct mxs_pcm_dma_params *dma_params = pcm_dma_data->dma_params;
if (!mxs_dma_is_apbx(chan))
return false;
if (chan->chan_id != dma_params->chan_num)
return false;
- chan->private = &iprtd->dma_data;
+ chan->private = &pcm_dma_data->dma_data;
return true;
}
-static int mxs_dma_alloc(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct mxs_pcm_runtime_data *iprtd = runtime->private_data;
- dma_cap_mask_t mask;
-
- iprtd->dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
-
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
- iprtd->dma_data.chan_irq = iprtd->dma_params->chan_irq;
- iprtd->dma_chan = dma_request_channel(mask, filter, iprtd);
- if (!iprtd->dma_chan)
- return -EINVAL;
-
- return 0;
-}
-
static int snd_mxs_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct mxs_pcm_runtime_data *iprtd = runtime->private_data;
- unsigned long dma_addr;
- struct dma_chan *chan;
- int ret;
-
- ret = mxs_dma_alloc(substream, params);
- if (ret)
- return ret;
- chan = iprtd->dma_chan;
-
- iprtd->size = params_buffer_bytes(params);
- iprtd->periods = params_periods(params);
- iprtd->period_bytes = params_period_bytes(params);
- iprtd->offset = 0;
- iprtd->period_time = HZ / (params_rate(params) /
- params_period_size(params));
-
snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
- dma_addr = runtime->dma_addr;
-
- iprtd->buf = substream->dma_buffer.area;
-
- iprtd->desc = chan->device->device_prep_dma_cyclic(chan, dma_addr,
- iprtd->period_bytes * iprtd->periods,
- iprtd->period_bytes,
- substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
- DMA_MEM_TO_DEV : DMA_DEV_TO_MEM);
- if (!iprtd->desc) {
- dev_err(&chan->dev->device, "cannot prepare slave dma\n");
- return -EINVAL;
- }
-
- iprtd->desc->callback = audio_dma_irq;
- iprtd->desc->callback_param = substream;
-
- return 0;
-}
-
-static int snd_mxs_pcm_hw_free(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct mxs_pcm_runtime_data *iprtd = runtime->private_data;
-
- if (iprtd->dma_chan) {
- dma_release_channel(iprtd->dma_chan);
- iprtd->dma_chan = NULL;
- }
-
- return 0;
-}
-
-static int snd_mxs_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct mxs_pcm_runtime_data *iprtd = runtime->private_data;
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- case SNDRV_PCM_TRIGGER_RESUME:
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- dmaengine_submit(iprtd->desc);
-
- break;
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- dmaengine_terminate_all(iprtd->dma_chan);
-
- break;
- default:
- return -EINVAL;
- }
-
return 0;
}
-static snd_pcm_uframes_t snd_mxs_pcm_pointer(
- struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct mxs_pcm_runtime_data *iprtd = runtime->private_data;
-
- return bytes_to_frames(substream->runtime, iprtd->offset);
-}
-
static int snd_mxs_open(struct snd_pcm_substream *substream)
{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct mxs_pcm_runtime_data *iprtd;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct mxs_pcm_dma_data *pcm_dma_data;
int ret;
- iprtd = kzalloc(sizeof(*iprtd), GFP_KERNEL);
- if (iprtd == NULL)
+ pcm_dma_data = kzalloc(sizeof(*pcm_dma_data), GFP_KERNEL);
+ if (pcm_dma_data == NULL)
return -ENOMEM;
- runtime->private_data = iprtd;
- ret = snd_pcm_hw_constraint_integer(substream->runtime,
- SNDRV_PCM_HW_PARAM_PERIODS);
- if (ret < 0) {
- kfree(iprtd);
+ pcm_dma_data->dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+ pcm_dma_data->dma_data.chan_irq = pcm_dma_data->dma_params->chan_irq;
+
+ ret = snd_dmaengine_pcm_open(substream, filter, pcm_dma_data);
+ if (ret) {
+ kfree(pcm_dma_data);
return ret;
}
snd_soc_set_runtime_hwparams(substream, &snd_mxs_hardware);
+ snd_dmaengine_pcm_set_data(substream, pcm_dma_data);
+
return 0;
}
static int snd_mxs_close(struct snd_pcm_substream *substream)
{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct mxs_pcm_runtime_data *iprtd = runtime->private_data;
+ struct mxs_pcm_dma_data *pcm_dma_data = snd_dmaengine_pcm_get_data(substream);
- kfree(iprtd);
+ snd_dmaengine_pcm_close(substream);
+ kfree(pcm_dma_data);
return 0;
}
.close = snd_mxs_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_mxs_pcm_hw_params,
- .hw_free = snd_mxs_pcm_hw_free,
- .trigger = snd_mxs_pcm_trigger,
- .pointer = snd_mxs_pcm_pointer,
+ .trigger = snd_dmaengine_pcm_trigger,
+ .pointer = snd_dmaengine_pcm_pointer,
.mmap = snd_mxs_pcm_mmap,
};
projects / mirror_ubuntu-artful-kernel.git / blobdiff