/**
* snd_dmaengine_pcm_trigger - dmaengine based PCM trigger implementation
* @substream: PCM substream
* @cmd: Trigger command
*
* Returns 0 on success, a negative error code otherwise.
*
* This function can be used as the PCM trigger callback for dmaengine based PCM
* driver implementations.
*/
int snd_dmaengine_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
int ret;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
ret = dmaengine_pcm_prepare_and_submit(substream);
if (ret)
return ret;
dma_async_issue_pending(prtd->dma_chan);
break;
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
dmaengine_resume(prtd->dma_chan);
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
dmaengine_pause(prtd->dma_chan);
break;
case SNDRV_PCM_TRIGGER_STOP:
dmaengine_terminate_all(prtd->dma_chan);
break;
default:
return -EINVAL;
}
return 0;
}
static void dmaengine_pcm_dma_complete(void *arg)
{
struct snd_pcm_substream *substream = arg;
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
#ifdef CONFIG_ARCH_ROCKCHIP
if(debug_audio_timeout){
struct snd_pcm_runtime *runtime = substream->runtime;
static ktime_t before = {0},after = {0};
s64 t;
before = after;
after = ktime_get();
t = ktime_to_us(ktime_sub(after, before));
if(t > (snd_pcm_lib_period_bytes(substream)/4+32)*1000*1000/runtime->rate
&& t != ktime_to_us(after)) // (23220)4096/4/44100 + 32/44100
{
printk(KERN_DEBUG "Time out:: Audio DMA buffdone time out!!! the time = %lld!\n", t);
}
//printk(KERN_DEBUG "audio DMA callback time = %lld\n", t);
}
#endif
prtd->pos += snd_pcm_lib_period_bytes(substream);
if (prtd->pos >= snd_pcm_lib_buffer_bytes(substream))
prtd->pos = 0;
snd_pcm_period_elapsed(substream);
}
static int dmaengine_pcm_prepare_and_submit(struct snd_pcm_substream *substream)
{
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
struct dma_chan *chan = prtd->dma_chan;
struct dma_async_tx_descriptor *desc;
enum dma_transfer_direction direction;
unsigned long flags = DMA_CTRL_ACK;
direction = snd_pcm_substream_to_dma_direction(substream);
if (!substream->runtime->no_period_wakeup)
flags |= DMA_PREP_INTERRUPT;
prtd->pos = 0;
desc = dmaengine_prep_dma_cyclic(chan,
substream->runtime->dma_addr,
snd_pcm_lib_buffer_bytes(substream),
snd_pcm_lib_period_bytes(substream), direction, flags);
if (!desc)
return -ENOMEM;
desc->callback = dmaengine_pcm_dma_complete;
desc->callback_param = substream;
prtd->cookie = dmaengine_submit(desc);
return 0;
}
static void dmaengine_pcm_dma_complete(void *arg)
{
struct snd_pcm_substream *substream = arg;
struct dmaengine_pcm_runtime_data *prtd;
snd_pcm_stream_lock(substream);
if (!substream || !substream->runtime) {
snd_pcm_stream_unlock(substream);
return;
}
prtd = substream_to_prtd(substream);
prtd->pos += snd_pcm_lib_period_bytes(substream);
if (prtd->pos >= snd_pcm_lib_buffer_bytes(substream))
prtd->pos = 0;
snd_pcm_stream_unlock(substream);
snd_pcm_period_elapsed(substream);
#ifdef CONFIG_SND_PXA_SSP_DUMP
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK
&& ssp_playback_enable) {
prtd->playback_transfer_addr =
substream->runtime->dma_addr + prtd->pos;
queue_work(ssp_playback_wq, &prtd->playback_dump_work);
} else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
&& ssp_capture_enable) {
prtd->capture_transfer_addr =
substream->runtime->dma_addr + prtd->pos;
queue_work(ssp_capture_wq, &prtd->capture_dump_work);
}
#endif
}
/**
* snd_dmaengine_pcm_release_chan_close - Close a dmaengine based PCM substream and release channel
* @substream: PCM substream
*
* Releases the DMA channel associated with the PCM substream.
*/
int snd_dmaengine_pcm_close_release_chan(struct snd_pcm_substream *substream)
{
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
dma_release_channel(prtd->dma_chan);
return snd_dmaengine_pcm_close(substream);
}
/**
* snd_dmaengine_pcm_close - Close a dmaengine based PCM substream
* @substream: PCM substream
*/
int snd_dmaengine_pcm_close(struct snd_pcm_substream *substream)
{
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
kfree(prtd);
return 0;
}
static int dmaengine_pcm_prepare_and_submit(struct snd_pcm_substream *substream)
{
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
struct dma_chan *chan = prtd->dma_chan;
struct dma_async_tx_descriptor *desc;
enum dma_transfer_direction direction;
unsigned long flags = DMA_CTRL_ACK;
direction = snd_pcm_substream_to_dma_direction(substream);
if (!substream->runtime->no_period_wakeup)
flags |= DMA_PREP_INTERRUPT;
prtd->pos = 0;
#if defined CONFIG_ARCH_SUN9IW1 || defined (CONFIG_ARCH_SUN8IW6) || defined CONFIG_ARCH_SUN8IW7
if (!strcmp(substream->pcm->card->id, "sndhdmiraw")) {
desc = dmaengine_prep_dma_cyclic(chan,
substream->runtime->dma_addr,
2*snd_pcm_lib_buffer_bytes(substream),
2*snd_pcm_lib_period_bytes(substream), direction, flags);
} else if (!strcmp(substream->pcm->card->id, "snddaudio")) {
#ifdef CONFIG_ARCH_SUN9IW1
desc = dmaengine_prep_dma_cyclic(chan,
substream->runtime->dma_addr,
snd_pcm_lib_buffer_bytes(substream),
snd_pcm_lib_buffer_bytes(substream), direction, flags);
#else//CONFIG_ARCH_SUN8IW6
desc = dmaengine_prep_dma_cyclic(chan,
substream->runtime->dma_addr,
snd_pcm_lib_buffer_bytes(substream),
snd_pcm_lib_period_bytes(substream), direction, flags);
#endif
} else {
desc = dmaengine_prep_dma_cyclic(chan,
substream->runtime->dma_addr,
snd_pcm_lib_buffer_bytes(substream),
snd_pcm_lib_period_bytes(substream), direction, flags);
}
#else
desc = dmaengine_prep_dma_cyclic(chan,
substream->runtime->dma_addr,
snd_pcm_lib_buffer_bytes(substream),
snd_pcm_lib_period_bytes(substream), direction, flags);
#endif
if (!desc)
return -ENOMEM;
desc->callback = dmaengine_pcm_dma_complete;
desc->callback_param = substream;
prtd->cookie = dmaengine_submit(desc);
return 0;
}
static void dmaengine_pcm_dma_complete(void *arg)
{
struct snd_pcm_substream *substream = arg;
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
prtd->pos += snd_pcm_lib_period_bytes(substream);
if (prtd->pos >= snd_pcm_lib_buffer_bytes(substream))
prtd->pos = 0;
snd_pcm_period_elapsed(substream);
}
/**
* snd_dmaengine_pcm_pointer_no_residue - dmaengine based PCM pointer implementation
* @substream: PCM substream
*
* This function is deprecated and should not be used by new drivers, as its
* results may be unreliable.
*/
snd_pcm_uframes_t snd_dmaengine_pcm_pointer_no_residue(struct snd_pcm_substream *substream)
{
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
#ifdef CONFIG_ARCH_ROCKCHIP
dma_addr_t src, dst;
prtd->dma_chan->device->dma_getposition(prtd->dma_chan, &src, &dst);
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
prtd->pos = dst - substream->runtime->dma_addr;
else
prtd->pos = src - substream->runtime->dma_addr;
#endif
return bytes_to_frames(substream->runtime, prtd->pos);
}
/**
* snd_dmaengine_pcm_pointer - dmaengine based PCM pointer implementation
* @substream: PCM substream
*
* This function can be used as the PCM pointer callback for dmaengine based PCM
* driver implementations.
*/
snd_pcm_uframes_t snd_dmaengine_pcm_pointer(struct snd_pcm_substream *substream)
{
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
struct dma_tx_state state;
enum dma_status status;
unsigned int buf_size;
unsigned int pos = 0;
status = dmaengine_tx_status(prtd->dma_chan, prtd->cookie, &state);
if (status == DMA_IN_PROGRESS || status == DMA_PAUSED) {
buf_size = snd_pcm_lib_buffer_bytes(substream);
if (state.residue > 0 && state.residue <= buf_size)
pos = buf_size - state.residue;
}
return bytes_to_frames(substream->runtime, pos);
}
/**
* snd_dmaengine_pcm_close - Close a dmaengine based PCM substream
* @substream: PCM substream
*/
int snd_dmaengine_pcm_close(struct snd_pcm_substream *substream)
{
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
#ifdef CONFIG_SND_PXA_SSP_DUMP
if (ssp_playback_wq)
flush_workqueue(ssp_playback_wq);
if (ssp_capture_wq)
flush_workqueue(ssp_capture_wq);
if (prtd->playback_fp)
filp_close(prtd->playback_fp, NULL);
if (prtd->capture_fp)
filp_close(prtd->capture_fp, NULL);
#endif
kfree(prtd);
return 0;
}
static int dmaengine_pcm_prepare_and_submit(struct snd_pcm_substream *substream)
{
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
struct dma_chan *chan = prtd->dma_chan;
struct dma_async_tx_descriptor *desc;
enum dma_transfer_direction direction;
unsigned long flags = DMA_CTRL_ACK;
direction = snd_pcm_substream_to_dma_direction(substream);
if (!substream->runtime->no_period_wakeup)
flags |= DMA_PREP_INTERRUPT;
prtd->pos = 0;
#ifdef CONFIG_ARCH_ROCKCHIP
//printk("soc dma buffersize = %d , periodsize=%d, periods=%d\n",
// snd_pcm_lib_buffer_bytes(substream),
// snd_pcm_lib_period_bytes(substream),
// snd_pcm_lib_buffer_bytes(substream)/snd_pcm_lib_period_bytes(substream));
desc = dmaengine_prep_dma_infiniteloop(chan,
substream->runtime->dma_addr,
snd_pcm_lib_buffer_bytes(substream),
snd_pcm_lib_period_bytes(substream),
direction, flags,
snd_pcm_lib_buffer_bytes(substream)/snd_pcm_lib_period_bytes(substream));
#else
desc = dmaengine_prep_dma_cyclic(chan,
substream->runtime->dma_addr,
snd_pcm_lib_buffer_bytes(substream),
snd_pcm_lib_period_bytes(substream), direction, flags);
#endif
if (!desc)
return -ENOMEM;
desc->callback = dmaengine_pcm_dma_complete;
desc->callback_param = substream;
prtd->cookie = dmaengine_submit(desc);
return 0;
}
static int dmaengine_pcm_prepare_and_submit(struct snd_pcm_substream *substream)
{
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
struct dma_chan *chan = prtd->dma_chan;
struct dma_async_tx_descriptor *desc;
enum dma_transfer_direction direction;
unsigned long flags = DMA_CTRL_ACK;
direction = snd_pcm_substream_to_dma_direction(substream);
if (!substream->runtime->no_period_wakeup)
flags |= DMA_PREP_INTERRUPT;
prtd->pos = 0;
desc = dmaengine_prep_dma_cyclic(chan,
substream->runtime->dma_addr,
snd_pcm_lib_buffer_bytes(substream),
snd_pcm_lib_period_bytes(substream), direction, flags);
if (!desc)
return -ENOMEM;
desc->callback = dmaengine_pcm_dma_complete;
desc->callback_param = substream;
prtd->cookie = dmaengine_submit(desc);
#ifdef CONFIG_SND_PXA_SSP_DUMP
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK
&& ssp_playback_enable) {
prtd->playback_totsize = snd_pcm_lib_buffer_bytes(substream);
prtd->playback_transfer_addr = substream->runtime->dma_addr;
prtd->playback_dump_addr = substream->runtime->dma_addr;
} else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
&& ssp_capture_enable) {
prtd->capture_totsize = snd_pcm_lib_buffer_bytes(substream);
prtd->capture_transfer_addr = substream->runtime->dma_addr;
prtd->capture_dump_addr = substream->runtime->dma_addr;
}
#endif
return 0;
}
static int dmaengine_pcm_prepare_and_submit(struct snd_pcm_substream *substream)
{
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
struct dma_chan *chan = prtd->dma_chan;
struct dma_async_tx_descriptor *desc;
enum dma_transfer_direction direction;
direction = snd_pcm_substream_to_dma_direction(substream);
prtd->pos = 0;
desc = dmaengine_prep_dma_cyclic(chan,
substream->runtime->dma_addr,
snd_pcm_lib_buffer_bytes(substream),
snd_pcm_lib_period_bytes(substream), direction);
if (!desc)
return -ENOMEM;
desc->callback = dmaengine_pcm_dma_complete;
desc->callback_param = substream;
dmaengine_submit(desc);
return 0;
}
static void dmaengine_pcm_dma_complete(void *arg)
{
struct snd_pcm_substream *substream = NULL;
struct dmaengine_pcm_runtime_data *prtd = NULL;
unsigned long flags;
substream = arg;
if (!substream) {
return;
}
snd_pcm_stream_lock_irqsave(substream, flags);
if (!substream->runtime) {
snd_pcm_stream_unlock_irqrestore(substream, flags);
return;
}
prtd = substream_to_prtd(substream);
prtd->pos += snd_pcm_lib_period_bytes(substream);
if (prtd->pos >= snd_pcm_lib_buffer_bytes(substream))
prtd->pos = 0;
snd_pcm_stream_unlock_irqrestore(substream, flags);
snd_pcm_period_elapsed(substream);
}
/**
* snd_dmaengine_pcm_pointer_no_residue - dmaengine based PCM pointer implementation
* @substream: PCM substream
*
* This function is deprecated and should not be used by new drivers, as its
* results may be unreliable.
*/
snd_pcm_uframes_t snd_dmaengine_pcm_pointer_no_residue(struct snd_pcm_substream *substream)
{
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
return bytes_to_frames(substream->runtime, prtd->pos);
}
/**
* snd_dmaengine_pcm_get_data - Get dmaeinge substream private data
* @substream: PCM substream
*
* Returns the data previously set with snd_dmaengine_pcm_set_data
*/
void *snd_dmaengine_pcm_get_data(struct snd_pcm_substream *substream)
{
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
return prtd->data;
}
struct dma_chan *snd_dmaengine_pcm_get_chan(struct snd_pcm_substream *substream)
{
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
return prtd->dma_chan;
}
/**
* snd_dmaengine_pcm_set_data - Set dmaengine substream private data
* @substream: PCM substream
* @data: Data to set
*/
void snd_dmaengine_pcm_set_data(struct snd_pcm_substream *substream, void *data)
{
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
prtd->data = data;
}
