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ASoC: sh: FSI: Add capture support 

Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
hifive-unleashed-5.1
Kuninori Morimoto 2009-10-30 12:02:44 +09:00 committed by Mark Brown
parent 9ddc9aa910
commit 07102f3cef
1 changed files with 86 additions and 7 deletions
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93
sound/soc/sh/fsi.c
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@ -447,6 +447,75 @@ static int fsi_data_push(struct fsi_priv *fsi)
return 0;
}
static int fsi_data_pop(struct fsi_priv *fsi)
{
struct snd_pcm_runtime *runtime;
struct snd_pcm_substream *substream = NULL;
int free;
int fifo_fill;
int width;
u8 *start;
int i;
if (!fsi ||
!fsi->substream ||
!fsi->substream->runtime)
return -EINVAL;
runtime = fsi->substream->runtime;
/* FSI FIFO has limit.
* So, this driver can not send periods data at a time
*/
if (fsi->byte_offset >=
fsi->period_len * (fsi->periods + 1)) {
substream = fsi->substream;
fsi->periods = (fsi->periods + 1) % runtime->periods;
if (0 == fsi->periods)
fsi->byte_offset = 0;
}
/* get 1 channel data width */
width = frames_to_bytes(runtime, 1) / fsi->chan;
/* get free space for alsa */
free = (fsi->buffer_len - fsi->byte_offset) / width;
/* get recv size */
fifo_fill = fsi_get_fifo_residue(fsi, 0);
if (free < fifo_fill)
fifo_fill = free;
start = runtime->dma_area;
start += fsi->byte_offset;
switch (width) {
case 2:
for (i = 0; i < fifo_fill; i++)
*((u16 *)start + i) =
(u16)(fsi_reg_read(fsi, DIDT) >> 8);
break;
case 4:
for (i = 0; i < fifo_fill; i++)
*((u32 *)start + i) = fsi_reg_read(fsi, DIDT);
break;
default:
return -EINVAL;
}
fsi->byte_offset += fifo_fill * width;
fsi_irq_enable(fsi, 0);
if (substream)
snd_pcm_period_elapsed(substream);
return 0;
}
static irqreturn_t fsi_interrupt(int irq, void *data)
{
u32 status = fsi_master_read(SOFT_RST) & ~0x00000010;
@ -460,6 +529,10 @@ static irqreturn_t fsi_interrupt(int irq, void *data)
fsi_data_push(&master->fsia);
if (int_st & INT_B_OUT)
fsi_data_push(&master->fsib);
if (int_st & INT_A_IN)
fsi_data_pop(&master->fsia);
if (int_st & INT_B_IN)
fsi_data_pop(&master->fsib);
fsi_master_write(INT_ST, 0x0000000);
@ -612,16 +685,12 @@ static int fsi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
int ret = 0;
/* capture not supported */
if (!is_play)
return -ENODEV;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
fsi_stream_push(fsi, substream,
frames_to_bytes(runtime, runtime->buffer_size),
frames_to_bytes(runtime, runtime->period_size));
ret = fsi_data_push(fsi);
ret = is_play ? fsi_data_push(fsi) : fsi_data_pop(fsi);
break;
case SNDRV_PCM_TRIGGER_STOP:
fsi_irq_disable(fsi, is_play);
@ -757,7 +826,12 @@ struct snd_soc_dai fsi_soc_dai[] = {
.channels_min = 1,
.channels_max = 8,
},
/* capture not supported */
.capture = {
.rates = FSI_RATES,
.formats = FSI_FMTS,
.channels_min = 1,
.channels_max = 8,
},
.ops = &fsi_dai_ops,
},
{
@ -769,7 +843,12 @@ struct snd_soc_dai fsi_soc_dai[] = {
.channels_min = 1,
.channels_max = 8,
},
/* capture not supported */
.capture = {
.rates = FSI_RATES,
.formats = FSI_FMTS,
.channels_min = 1,
.channels_max = 8,
},
.ops = &fsi_dai_ops,
},
};