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ASoC: fsl-ssi: Support for SND_SOC_DAIFMT_CBM_CFS

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Add SND_SOC_DAIFMT_CBM_CFS support for Freescale architecture.
Successfully tested on i.MX 6Quad Wandboard and UDOO boards connected to
the pcm1792a codec.
In CBM_CFS mode, when using a sample size of 16 bits, we cannot use
CCSR_SSI_SCR_I2S_MODE_MASTER since we get a frame sync every 16 bits.

Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Fabio Falzoi <fabio.falzoi84@gmail.com>
Tested-by: Angelo Adamo <adamo.a60@gmail.com>
Acked-by: Timur Tabi <timur@tabi.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Fabio Falzoi 2014-08-04 17:08:07 +02:00 committed by Mark Brown
parent ae34a78c43
commit cf4f7fc3e7
1 changed files with 28 additions and 5 deletions
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33
sound/soc/fsl/fsl_ssi.c
View file

@ -259,6 +259,11 @@ static bool fsl_ssi_is_i2s_master(struct fsl_ssi_private *ssi_private)
SND_SOC_DAIFMT_CBS_CFS;
}
static bool fsl_ssi_is_i2s_cbm_cfs(struct fsl_ssi_private *ssi_private)
{
return (ssi_private->dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) ==
SND_SOC_DAIFMT_CBM_CFS;
}
/**
* fsl_ssi_isr: SSI interrupt handler
*
@ -705,6 +710,23 @@ static int fsl_ssi_hw_params(struct snd_pcm_substream *substream,
}
}
if (!fsl_ssi_is_ac97(ssi_private)) {
u8 i2smode;
/*
* Switch to normal net mode in order to have a frame sync
* signal every 32 bits instead of 16 bits
*/
if (fsl_ssi_is_i2s_cbm_cfs(ssi_private) && sample_size == 16)
i2smode = CCSR_SSI_SCR_I2S_MODE_NORMAL |
CCSR_SSI_SCR_NET;
else
i2smode = ssi_private->i2s_mode;
regmap_update_bits(regs, CCSR_SSI_SCR,
CCSR_SSI_SCR_NET | CCSR_SSI_SCR_I2S_MODE_MASK,
channels == 1 ? 0 : i2smode);
}
/*
* FIXME: The documentation says that SxCCR[WL] should not be
* modified while the SSI is enabled. The only time this can
@ -724,11 +746,6 @@ static int fsl_ssi_hw_params(struct snd_pcm_substream *substream,
regmap_update_bits(regs, CCSR_SSI_SRCCR, CCSR_SSI_SxCCR_WL_MASK,
wl);
if (!fsl_ssi_is_ac97(ssi_private))
regmap_update_bits(regs, CCSR_SSI_SCR,
CCSR_SSI_SCR_NET | CCSR_SSI_SCR_I2S_MODE_MASK,
channels == 1 ? 0 : ssi_private->i2s_mode);
return 0;
}
@ -780,6 +797,7 @@ static int _fsl_ssi_set_dai_fmt(struct fsl_ssi_private *ssi_private,
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFS:
case SND_SOC_DAIFMT_CBS_CFS:
ssi_private->i2s_mode |= CCSR_SSI_SCR_I2S_MODE_MASTER;
regmap_update_bits(regs, CCSR_SSI_STCCR,
@ -853,6 +871,11 @@ static int _fsl_ssi_set_dai_fmt(struct fsl_ssi_private *ssi_private,
case SND_SOC_DAIFMT_CBM_CFM:
scr &= ~CCSR_SSI_SCR_SYS_CLK_EN;
break;
case SND_SOC_DAIFMT_CBM_CFS:
strcr &= ~CCSR_SSI_STCR_TXDIR;
strcr |= CCSR_SSI_STCR_TFDIR;
scr &= ~CCSR_SSI_SCR_SYS_CLK_EN;
break;
default:
return -EINVAL;
}