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Commit ead99f89 authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Mark Brown
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ASoC: ssm4567: Add support for setting the DAI format and TDM configuration 



The SSM4567 has support for a couple of different DAI formats. In TDM mode
it is also possible to select the TDM slot. This patch adds support for this
by implementing the set_fmt and set_tdm_slot callbacks.

Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent feec843d

sound/soc/codecs/ssm4567.c

+119 −0
Original line number Diff line number Diff line
@@ -69,6 +69,22 @@ 
#define SSM4567_DAC_FS_64000_96000	0x3

#define SSM4567_DAC_FS_128000_192000	0x4



/* SAI_CTRL_1 */

#define SSM4567_SAI_CTRL_1_BCLK			BIT(6)

#define SSM4567_SAI_CTRL_1_TDM_BLCKS_MASK	(0x3 << 4)

#define SSM4567_SAI_CTRL_1_TDM_BLCKS_32		(0x0 << 4)

#define SSM4567_SAI_CTRL_1_TDM_BLCKS_48		(0x1 << 4)

#define SSM4567_SAI_CTRL_1_TDM_BLCKS_64		(0x2 << 4)

#define SSM4567_SAI_CTRL_1_FSYNC		BIT(3)

#define SSM4567_SAI_CTRL_1_LJ			BIT(2)

#define SSM4567_SAI_CTRL_1_TDM			BIT(1)

#define SSM4567_SAI_CTRL_1_PDM			BIT(0)



/* SAI_CTRL_2 */

#define SSM4567_SAI_CTRL_2_AUTO_SLOT		BIT(3)

#define SSM4567_SAI_CTRL_2_TDM_SLOT_MASK	0x7

#define SSM4567_SAI_CTRL_2_TDM_SLOT(x)		(x)



struct ssm4567 {

	struct regmap *regmap;

};
@@ -194,6 +210,107 @@ static int ssm4567_mute(struct snd_soc_dai *dai, int mute) 
			SSM4567_DAC_MUTE, val);

}



static int ssm4567_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,

	unsigned int rx_mask, int slots, int width)

{

	struct ssm4567 *ssm4567 = snd_soc_dai_get_drvdata(dai);

	unsigned int blcks;

	int slot;

	int ret;



	if (tx_mask == 0)

		return -EINVAL;



	if (rx_mask && rx_mask != tx_mask)

		return -EINVAL;



	slot = __ffs(tx_mask);

	if (tx_mask != BIT(slot))

		return -EINVAL;



	switch (width) {

	case 32:

		blcks = SSM4567_SAI_CTRL_1_TDM_BLCKS_32;

		break;

	case 48:

		blcks = SSM4567_SAI_CTRL_1_TDM_BLCKS_48;

		break;

	case 64:

		blcks = SSM4567_SAI_CTRL_1_TDM_BLCKS_64;

		break;

	default:

		return -EINVAL;

	}



	ret = regmap_update_bits(ssm4567->regmap, SSM4567_REG_SAI_CTRL_2,

		SSM4567_SAI_CTRL_2_AUTO_SLOT | SSM4567_SAI_CTRL_2_TDM_SLOT_MASK,

		SSM4567_SAI_CTRL_2_TDM_SLOT(slot));

	if (ret)

		return ret;



	return regmap_update_bits(ssm4567->regmap, SSM4567_REG_SAI_CTRL_1,

		SSM4567_SAI_CTRL_1_TDM_BLCKS_MASK, blcks);

}



static int ssm4567_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)

{

	struct ssm4567 *ssm4567 = snd_soc_dai_get_drvdata(dai);

	unsigned int ctrl1 = 0;

	bool invert_fclk;



	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {

	case SND_SOC_DAIFMT_CBS_CFS:

		break;

	default:

		return -EINVAL;

	}



	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {

	case SND_SOC_DAIFMT_NB_NF:

		invert_fclk = false;

		break;

	case SND_SOC_DAIFMT_IB_NF:

		ctrl1 |= SSM4567_SAI_CTRL_1_BCLK;

		invert_fclk = false;

		break;

	case SND_SOC_DAIFMT_NB_IF:

		ctrl1 |= SSM4567_SAI_CTRL_1_FSYNC;

		invert_fclk = true;

		break;

	case SND_SOC_DAIFMT_IB_IF:

		ctrl1 |= SSM4567_SAI_CTRL_1_BCLK;

		invert_fclk = true;

		break;

	default:

		return -EINVAL;

	}



	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {

	case SND_SOC_DAIFMT_I2S:

		break;

	case SND_SOC_DAIFMT_LEFT_J:

		ctrl1 |= SSM4567_SAI_CTRL_1_LJ;

		invert_fclk = !invert_fclk;

		break;

	case SND_SOC_DAIFMT_DSP_A:

		ctrl1 |= SSM4567_SAI_CTRL_1_TDM;

		break;

	case SND_SOC_DAIFMT_DSP_B:

		ctrl1 |= SSM4567_SAI_CTRL_1_TDM | SSM4567_SAI_CTRL_1_LJ;

		break;

	case SND_SOC_DAIFMT_PDM:

		ctrl1 |= SSM4567_SAI_CTRL_1_PDM;

		break;

	default:

		return -EINVAL;

	}



	if (invert_fclk)

		ctrl1 |= SSM4567_SAI_CTRL_1_FSYNC;



	return regmap_write(ssm4567->regmap, SSM4567_REG_SAI_CTRL_1, ctrl1);

}



static int ssm4567_set_power(struct ssm4567 *ssm4567, bool enable)

{

	int ret = 0;
@@ -248,6 +365,8 @@ static int ssm4567_set_bias_level(struct snd_soc_codec *codec, 
static const struct snd_soc_dai_ops ssm4567_dai_ops = {

	.hw_params	= ssm4567_hw_params,

	.digital_mute	= ssm4567_mute,

	.set_fmt	= ssm4567_set_dai_fmt,

	.set_tdm_slot	= ssm4567_set_tdm_slot,

};



static struct snd_soc_dai_driver ssm4567_dai = {