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ASoC: fsl_sai: Add disable operation for the corresponding data channel.

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Enables/Disables the corresponding data channel for tx/rx operation.
A channel must be enabled before its FIFO is accessed, and then disable
it when tx/rx is stopped or idle.

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Xiubo Li 2013-12-25 12:40:04 +08:00 committed by Mark Brown
parent e6dc12d719
commit e5d0fa9c3e
1 changed files with 13 additions and 8 deletions
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21
sound/soc/fsl/fsl_sai.c
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@ -124,20 +124,17 @@ static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai,
unsigned int fmt, int fsl_dir)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
u32 val_cr2, val_cr3, val_cr4, reg_cr2, reg_cr3, reg_cr4;
u32 val_cr2, val_cr4, reg_cr2, reg_cr4;
if (fsl_dir == FSL_FMT_TRANSMITTER) {
reg_cr2 = FSL_SAI_TCR2;
reg_cr3 = FSL_SAI_TCR3;
reg_cr4 = FSL_SAI_TCR4;
} else {
reg_cr2 = FSL_SAI_RCR2;
reg_cr3 = FSL_SAI_RCR3;
reg_cr4 = FSL_SAI_RCR4;
}
val_cr2 = sai_readl(sai, sai->base + reg_cr2);
val_cr3 = sai_readl(sai, sai->base + reg_cr3);
val_cr4 = sai_readl(sai, sai->base + reg_cr4);
if (sai->big_endian_data)
@ -188,13 +185,10 @@ static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai,
return -EINVAL;
}
val_cr3 |= FSL_SAI_CR3_TRCE;
if (fsl_dir == FSL_FMT_RECEIVER)
val_cr2 |= FSL_SAI_CR2_SYNC;
sai_writel(sai, val_cr2, sai->base + reg_cr2);
sai_writel(sai, val_cr3, sai->base + reg_cr3);
sai_writel(sai, val_cr4, sai->base + reg_cr4);
return 0;
@ -278,7 +272,7 @@ static int fsl_sai_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *cpu_dai)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
unsigned int tcsr, rcsr;
u32 tcsr, rcsr, val_cr3, reg_cr3;
tcsr = sai_readl(sai, sai->base + FSL_SAI_TCSR);
rcsr = sai_readl(sai, sai->base + FSL_SAI_RCSR);
@ -286,17 +280,24 @@ static int fsl_sai_trigger(struct snd_pcm_substream *substream, int cmd,
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
tcsr |= FSL_SAI_CSR_FRDE;
rcsr &= ~FSL_SAI_CSR_FRDE;
reg_cr3 = FSL_SAI_TCR3;
} else {
rcsr |= FSL_SAI_CSR_FRDE;
tcsr &= ~FSL_SAI_CSR_FRDE;
reg_cr3 = FSL_SAI_RCR3;
}
val_cr3 = sai_readl(sai, sai->base + reg_cr3);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
tcsr |= FSL_SAI_CSR_TERE;
rcsr |= FSL_SAI_CSR_TERE;
val_cr3 |= FSL_SAI_CR3_TRCE;
sai_writel(sai, val_cr3, sai->base + reg_cr3);
sai_writel(sai, rcsr, sai->base + FSL_SAI_RCSR);
sai_writel(sai, tcsr, sai->base + FSL_SAI_TCSR);
break;
@ -308,8 +309,12 @@ static int fsl_sai_trigger(struct snd_pcm_substream *substream, int cmd,
tcsr &= ~FSL_SAI_CSR_TERE;
rcsr &= ~FSL_SAI_CSR_TERE;
}
val_cr3 &= ~FSL_SAI_CR3_TRCE;
sai_writel(sai, tcsr, sai->base + FSL_SAI_TCSR);
sai_writel(sai, rcsr, sai->base + FSL_SAI_RCSR);
sai_writel(sai, val_cr3, sai->base + reg_cr3);
break;
default:
return -EINVAL;