sound/soc/codecs/ad193x.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * AD193X Audio Codec driver supporting AD1936/7/8/9
  *
  * Copyright 2010 Analog Devices Inc.
  */

 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
 #include <linux/regmap.h>
 #include <linux/slab.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/initval.h>
 #include <sound/soc.h>
 #include <sound/tlv.h>

 #include "ad193x.h"

 /* codec private data */
 struct ad193x_priv {
 	struct regmap *regmap;
 	enum ad193x_type type;
 	int sysclk;
 };

 /*
  * AD193X volume/mute/de-emphasis etc. controls
  */
 static const char * const ad193x_deemp[] = {"None", "48kHz", "44.1kHz", "32kHz"};

 static SOC_ENUM_SINGLE_DECL(ad193x_deemp_enum, AD193X_DAC_CTRL2, 1,
 			    ad193x_deemp);

 static const DECLARE_TLV_DB_MINMAX(adau193x_tlv, -9563, 0);

 static const unsigned int ad193x_sb[] = {32};

 static struct snd_pcm_hw_constraint_list constr = {
 	.list = ad193x_sb,
 	.count = ARRAY_SIZE(ad193x_sb),
 };

 static const struct snd_kcontrol_new ad193x_snd_controls[] = {
 	/* DAC volume control */
 	SOC_DOUBLE_R_TLV("DAC1 Volume", AD193X_DAC_L1_VOL,
 			AD193X_DAC_R1_VOL, 0, 0xFF, 1, adau193x_tlv),
 	SOC_DOUBLE_R_TLV("DAC2 Volume", AD193X_DAC_L2_VOL,
 			AD193X_DAC_R2_VOL, 0, 0xFF, 1, adau193x_tlv),
 	SOC_DOUBLE_R_TLV("DAC3 Volume", AD193X_DAC_L3_VOL,
 			AD193X_DAC_R3_VOL, 0, 0xFF, 1, adau193x_tlv),
 	SOC_DOUBLE_R_TLV("DAC4 Volume", AD193X_DAC_L4_VOL,
 			AD193X_DAC_R4_VOL, 0, 0xFF, 1, adau193x_tlv),

 	/* DAC switch control */
 	SOC_DOUBLE("DAC1 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL1_MUTE,
 		AD193X_DACR1_MUTE, 1, 1),
 	SOC_DOUBLE("DAC2 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL2_MUTE,
 		AD193X_DACR2_MUTE, 1, 1),
 	SOC_DOUBLE("DAC3 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL3_MUTE,
 		AD193X_DACR3_MUTE, 1, 1),
 	SOC_DOUBLE("DAC4 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL4_MUTE,
 		AD193X_DACR4_MUTE, 1, 1),

 	/* DAC de-emphasis */
 	SOC_ENUM("Playback Deemphasis", ad193x_deemp_enum),
 };

 static const struct snd_kcontrol_new ad193x_adc_snd_controls[] = {
 	/* ADC switch control */
 	SOC_DOUBLE("ADC1 Switch", AD193X_ADC_CTRL0, AD193X_ADCL1_MUTE,
 		AD193X_ADCR1_MUTE, 1, 1),
 	SOC_DOUBLE("ADC2 Switch", AD193X_ADC_CTRL0, AD193X_ADCL2_MUTE,
 		AD193X_ADCR2_MUTE, 1, 1),

 	/* ADC high-pass filter */
 	SOC_SINGLE("ADC High Pass Filter Switch", AD193X_ADC_CTRL0,
 			AD193X_ADC_HIGHPASS_FILTER, 1, 0),
 };

 static const struct snd_soc_dapm_widget ad193x_dapm_widgets[] = {
 	SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_PGA("DAC Output", AD193X_DAC_CTRL0, 0, 1, NULL, 0),
 	SND_SOC_DAPM_SUPPLY("PLL_PWR", AD193X_PLL_CLK_CTRL0, 0, 1, NULL, 0),
 	SND_SOC_DAPM_SUPPLY("SYSCLK", AD193X_PLL_CLK_CTRL0, 7, 0, NULL, 0),
 	SND_SOC_DAPM_VMID("VMID"),
 	SND_SOC_DAPM_OUTPUT("DAC1OUT"),
 	SND_SOC_DAPM_OUTPUT("DAC2OUT"),
 	SND_SOC_DAPM_OUTPUT("DAC3OUT"),
 	SND_SOC_DAPM_OUTPUT("DAC4OUT"),
 };

 static const struct snd_soc_dapm_widget ad193x_adc_widgets[] = {
 	SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_SUPPLY("ADC_PWR", AD193X_ADC_CTRL0, 0, 1, NULL, 0),
 	SND_SOC_DAPM_INPUT("ADC1IN"),
 	SND_SOC_DAPM_INPUT("ADC2IN"),
 };

 static int ad193x_check_pll(struct snd_soc_dapm_widget *source,
 			    struct snd_soc_dapm_widget *sink)
 {
 	struct snd_soc_component *component = snd_soc_dapm_to_component(source->dapm);
 	struct ad193x_priv *ad193x = snd_soc_component_get_drvdata(component);

 	return !!ad193x->sysclk;
 }

 static const struct snd_soc_dapm_route audio_paths[] = {
 	{ "DAC", NULL, "SYSCLK" },
 	{ "DAC Output", NULL, "DAC" },
 	{ "DAC Output", NULL, "VMID" },
 	{ "DAC1OUT", NULL, "DAC Output" },
 	{ "DAC2OUT", NULL, "DAC Output" },
 	{ "DAC3OUT", NULL, "DAC Output" },
 	{ "DAC4OUT", NULL, "DAC Output" },
 	{ "SYSCLK", NULL, "PLL_PWR", &ad193x_check_pll },
 };

 static const struct snd_soc_dapm_route ad193x_adc_audio_paths[] = {
 	{ "ADC", NULL, "SYSCLK" },
 	{ "ADC", NULL, "ADC_PWR" },
 	{ "ADC", NULL, "ADC1IN" },
 	{ "ADC", NULL, "ADC2IN" },
 };

 static inline bool ad193x_has_adc(const struct ad193x_priv *ad193x)
 {
 	switch (ad193x->type) {
 	case AD1933:
 	case AD1934:
 		return false;
 	default:
 		break;
 	}

 	return true;
 }

 /*
  * DAI ops entries
  */

 static int ad193x_mute(struct snd_soc_dai *dai, int mute, int direction)
 {
 	struct ad193x_priv *ad193x = snd_soc_component_get_drvdata(dai->component);

 	if (mute)
 		regmap_update_bits(ad193x->regmap, AD193X_DAC_CTRL2,
 				    AD193X_DAC_MASTER_MUTE,
 				    AD193X_DAC_MASTER_MUTE);
 	else
 		regmap_update_bits(ad193x->regmap, AD193X_DAC_CTRL2,
 				    AD193X_DAC_MASTER_MUTE, 0);

 	return 0;
 }

 static int ad193x_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
 			       unsigned int rx_mask, int slots, int width)
 {
 	struct ad193x_priv *ad193x = snd_soc_component_get_drvdata(dai->component);
 	unsigned int channels;

 	switch (slots) {
 	case 2:
 		channels = AD193X_2_CHANNELS;
 		break;
 	case 4:
 		channels = AD193X_4_CHANNELS;
 		break;
 	case 8:
 		channels = AD193X_8_CHANNELS;
 		break;
 	case 16:
 		channels = AD193X_16_CHANNELS;
 		break;
 	default:
 		return -EINVAL;
 	}

 	regmap_update_bits(ad193x->regmap, AD193X_DAC_CTRL1,
 		AD193X_DAC_CHAN_MASK, channels << AD193X_DAC_CHAN_SHFT);
 	if (ad193x_has_adc(ad193x))
 		regmap_update_bits(ad193x->regmap, AD193X_ADC_CTRL2,
 				   AD193X_ADC_CHAN_MASK,
 				   channels << AD193X_ADC_CHAN_SHFT);

 	return 0;
 }

 static int ad193x_set_dai_fmt(struct snd_soc_dai *codec_dai,
 		unsigned int fmt)
 {
 	struct ad193x_priv *ad193x = snd_soc_component_get_drvdata(codec_dai->component);
 	unsigned int adc_serfmt = 0;
 	unsigned int dac_serfmt = 0;
 	unsigned int adc_fmt = 0;
 	unsigned int dac_fmt = 0;

 	/* At present, the driver only support AUX ADC mode(SND_SOC_DAIFMT_I2S
 	 * with TDM), ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A) and DAC I2S mode
 	 * (SND_SOC_DAIFMT_I2S)
 	 */
 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 	case SND_SOC_DAIFMT_I2S:
 		adc_serfmt |= AD193X_ADC_SERFMT_TDM;
 		dac_serfmt |= AD193X_DAC_SERFMT_STEREO;
 		break;
 	case SND_SOC_DAIFMT_DSP_A:
 		adc_serfmt |= AD193X_ADC_SERFMT_AUX;
 		dac_serfmt |= AD193X_DAC_SERFMT_TDM;
 		break;
 	default:
 		if (ad193x_has_adc(ad193x))
 			return -EINVAL;
 	}

 	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 	case SND_SOC_DAIFMT_NB_NF: /* normal bit clock + frame */
 		break;
 	case SND_SOC_DAIFMT_NB_IF: /* normal bclk + invert frm */
 		adc_fmt |= AD193X_ADC_LEFT_HIGH;
 		dac_fmt |= AD193X_DAC_LEFT_HIGH;
 		break;
 	case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal frm */
 		adc_fmt |= AD193X_ADC_BCLK_INV;
 		dac_fmt |= AD193X_DAC_BCLK_INV;
 		break;
 	case SND_SOC_DAIFMT_IB_IF: /* invert bclk + frm */
 		adc_fmt |= AD193X_ADC_LEFT_HIGH;
 		adc_fmt |= AD193X_ADC_BCLK_INV;
 		dac_fmt |= AD193X_DAC_LEFT_HIGH;
 		dac_fmt |= AD193X_DAC_BCLK_INV;
 		break;
 	default:
 		return -EINVAL;
 	}

 	/* For DSP_*, LRCLK's polarity must be inverted */
 	if (fmt & SND_SOC_DAIFMT_DSP_A)
 		dac_fmt ^= AD193X_DAC_LEFT_HIGH;

 	switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
 	case SND_SOC_DAIFMT_CBP_CFP:
 		adc_fmt |= AD193X_ADC_LCR_MASTER;
 		adc_fmt |= AD193X_ADC_BCLK_MASTER;
 		dac_fmt |= AD193X_DAC_LCR_MASTER;
 		dac_fmt |= AD193X_DAC_BCLK_MASTER;
 		break;
 	case SND_SOC_DAIFMT_CBC_CFP:
 		adc_fmt |= AD193X_ADC_LCR_MASTER;
 		dac_fmt |= AD193X_DAC_LCR_MASTER;
 		break;
 	case SND_SOC_DAIFMT_CBP_CFC:
 		adc_fmt |= AD193X_ADC_BCLK_MASTER;
 		dac_fmt |= AD193X_DAC_BCLK_MASTER;
 		break;
 	case SND_SOC_DAIFMT_CBC_CFC:
 		break;
 	default:
 		return -EINVAL;
 	}

 	if (ad193x_has_adc(ad193x)) {
 		regmap_update_bits(ad193x->regmap, AD193X_ADC_CTRL1,
 				   AD193X_ADC_SERFMT_MASK, adc_serfmt);
 		regmap_update_bits(ad193x->regmap, AD193X_ADC_CTRL2,
 				   AD193X_ADC_FMT_MASK, adc_fmt);
 	}
 	regmap_update_bits(ad193x->regmap, AD193X_DAC_CTRL0,
 			   AD193X_DAC_SERFMT_MASK, dac_serfmt);
 	regmap_update_bits(ad193x->regmap, AD193X_DAC_CTRL1,
 		AD193X_DAC_FMT_MASK, dac_fmt);

 	return 0;
 }

 static int ad193x_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 		int clk_id, unsigned int freq, int dir)
 {
 	struct snd_soc_component *component = codec_dai->component;
 	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
 	struct ad193x_priv *ad193x = snd_soc_component_get_drvdata(component);

 	if (clk_id == AD193X_SYSCLK_MCLK) {
 		/* MCLK must be 512 x fs */
 		if (dir == SND_SOC_CLOCK_OUT || freq != 24576000)
 			return -EINVAL;

 		regmap_update_bits(ad193x->regmap, AD193X_PLL_CLK_CTRL1,
 				   AD193X_PLL_SRC_MASK,
 				   AD193X_PLL_DAC_SRC_MCLK |
 				   AD193X_PLL_CLK_SRC_MCLK);

 		snd_soc_dapm_sync(dapm);
 		return 0;
 	}
 	switch (freq) {
 	case 12288000:
 	case 18432000:
 	case 24576000:
 	case 36864000:
 		ad193x->sysclk = freq;
 		return 0;
 	}
 	return -EINVAL;
 }

 static int ad193x_hw_params(struct snd_pcm_substream *substream,
 		struct snd_pcm_hw_params *params,
 		struct snd_soc_dai *dai)
 {
 	int word_len = 0, master_rate = 0;
 	struct snd_soc_component *component = dai->component;
 	struct ad193x_priv *ad193x = snd_soc_component_get_drvdata(component);
 	bool is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 	u8 dacc0;

 	dev_dbg(dai->dev, "%s() rate=%u format=%#x width=%u channels=%u\n",
 		__func__, params_rate(params), params_format(params),
 		params_width(params), params_channels(params));


 	/* bit size */
 	switch (params_width(params)) {
 	case 16:
 		word_len = 3;
 		break;
 	case 20:
 		word_len = 1;
 		break;
 	case 24:
 	case 32:
 		word_len = 0;
 		break;
 	}

 	switch (ad193x->sysclk) {
 	case 12288000:
 		master_rate = AD193X_PLL_INPUT_256;
 		break;
 	case 18432000:
 		master_rate = AD193X_PLL_INPUT_384;
 		break;
 	case 24576000:
 		master_rate = AD193X_PLL_INPUT_512;
 		break;
 	case 36864000:
 		master_rate = AD193X_PLL_INPUT_768;
 		break;
 	}

 	if (is_playback) {
 		switch (params_rate(params)) {
 		case 48000:
 			dacc0 = AD193X_DAC_SR_48;
 			break;
 		case 96000:
 			dacc0 = AD193X_DAC_SR_96;
 			break;
 		case 192000:
 			dacc0 = AD193X_DAC_SR_192;
 			break;
 		default:
 			dev_err(dai->dev, "invalid sampling rate: %d\n", params_rate(params));
 			return -EINVAL;
 		}

 		regmap_update_bits(ad193x->regmap, AD193X_DAC_CTRL0, AD193X_DAC_SR_MASK, dacc0);
 	}

 	regmap_update_bits(ad193x->regmap, AD193X_PLL_CLK_CTRL0,
 			    AD193X_PLL_INPUT_MASK, master_rate);

 	regmap_update_bits(ad193x->regmap, AD193X_DAC_CTRL2,
 			    AD193X_DAC_WORD_LEN_MASK,
 			    word_len << AD193X_DAC_WORD_LEN_SHFT);

 	if (ad193x_has_adc(ad193x))
 		regmap_update_bits(ad193x->regmap, AD193X_ADC_CTRL1,
 				   AD193X_ADC_WORD_LEN_MASK, word_len);

 	return 0;
 }

 static int ad193x_startup(struct snd_pcm_substream *substream,
 			  struct snd_soc_dai *dai)
 {
 	return snd_pcm_hw_constraint_list(substream->runtime, 0,
 				   SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 				   &constr);
 }

 static const struct snd_soc_dai_ops ad193x_dai_ops = {
 	.startup = ad193x_startup,
 	.hw_params = ad193x_hw_params,
 	.mute_stream = ad193x_mute,
 	.set_tdm_slot = ad193x_set_tdm_slot,
 	.set_sysclk	= ad193x_set_dai_sysclk,
 	.set_fmt = ad193x_set_dai_fmt,
 	.no_capture_mute = 1,
 };

 /* codec DAI instance */
 static struct snd_soc_dai_driver ad193x_dai = {
 	.name = "ad193x-hifi",
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 2,
 		.channels_max = 8,
 		.rates = SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000,
 		.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
 			SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
 	},
 	.capture = {
 		.stream_name = "Capture",
 		.channels_min = 2,
 		.channels_max = 4,
 		.rates = SNDRV_PCM_RATE_48000,
 		.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
 			SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
 	},
 	.ops = &ad193x_dai_ops,
 };

 /* codec DAI instance for DAC only */
 static struct snd_soc_dai_driver ad193x_no_adc_dai = {
 	.name = "ad193x-hifi",
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 2,
 		.channels_max = 8,
 		.rates = SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000,
 		.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
 			SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
 	},
 	.ops = &ad193x_dai_ops,
 };

 /* codec register values to set after reset */
 static void ad193x_reg_default_init(struct ad193x_priv *ad193x)
 {
 	static const struct reg_sequence reg_init[] = {
 		{  0, 0x99 },	/* PLL_CLK_CTRL0: pll input: mclki/xi 12.288Mhz */
 		{  1, 0x04 },	/* PLL_CLK_CTRL1: no on-chip Vref */
 		{  2, 0x40 },	/* DAC_CTRL0: TDM mode */
 		{  3, 0x00 },	/* DAC_CTRL1: reset */
 		{  4, 0x1A },	/* DAC_CTRL2: 48kHz de-emphasis, unmute dac */
 		{  5, 0x00 },	/* DAC_CHNL_MUTE: unmute DAC channels */
 		{  6, 0x00 },	/* DAC_L1_VOL: no attenuation */
 		{  7, 0x00 },	/* DAC_R1_VOL: no attenuation */
 		{  8, 0x00 },	/* DAC_L2_VOL: no attenuation */
 		{  9, 0x00 },	/* DAC_R2_VOL: no attenuation */
 		{ 10, 0x00 },	/* DAC_L3_VOL: no attenuation */
 		{ 11, 0x00 },	/* DAC_R3_VOL: no attenuation */
 		{ 12, 0x00 },	/* DAC_L4_VOL: no attenuation */
 		{ 13, 0x00 },	/* DAC_R4_VOL: no attenuation */
 	};
 	static const struct reg_sequence reg_adc_init[] = {
 		{ 14, 0x03 },	/* ADC_CTRL0: high-pass filter enable */
 		{ 15, 0x43 },	/* ADC_CTRL1: sata delay=1, adc aux mode */
 		{ 16, 0x00 },	/* ADC_CTRL2: reset */
 	};

 	regmap_multi_reg_write(ad193x->regmap, reg_init, ARRAY_SIZE(reg_init));

 	if (ad193x_has_adc(ad193x)) {
 		regmap_multi_reg_write(ad193x->regmap, reg_adc_init,
 				       ARRAY_SIZE(reg_adc_init));
 	}
 }

 static int ad193x_component_probe(struct snd_soc_component *component)
 {
 	struct ad193x_priv *ad193x = snd_soc_component_get_drvdata(component);
 	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
 	int num, ret;

 	/* default setting for ad193x */
 	ad193x_reg_default_init(ad193x);

 	/* adc only */
 	if (ad193x_has_adc(ad193x)) {
 		/* add adc controls */
 		num = ARRAY_SIZE(ad193x_adc_snd_controls);
 		ret = snd_soc_add_component_controls(component,
 						 ad193x_adc_snd_controls,
 						 num);
 		if (ret)
 			return ret;

 		/* add adc widgets */
 		num = ARRAY_SIZE(ad193x_adc_widgets);
 		ret = snd_soc_dapm_new_controls(dapm,
 						ad193x_adc_widgets,
 						num);
 		if (ret)
 			return ret;

 		/* add adc routes */
 		num = ARRAY_SIZE(ad193x_adc_audio_paths);
 		ret = snd_soc_dapm_add_routes(dapm,
 					      ad193x_adc_audio_paths,
 					      num);
 		if (ret)
 			return ret;
 	}

 	return 0;
 }

 static const struct snd_soc_component_driver soc_component_dev_ad193x = {
 	.probe			= ad193x_component_probe,
 	.controls		= ad193x_snd_controls,
 	.num_controls		= ARRAY_SIZE(ad193x_snd_controls),
 	.dapm_widgets		= ad193x_dapm_widgets,
 	.num_dapm_widgets	= ARRAY_SIZE(ad193x_dapm_widgets),
 	.dapm_routes		= audio_paths,
 	.num_dapm_routes	= ARRAY_SIZE(audio_paths),
 	.idle_bias_on		= 1,
 	.use_pmdown_time	= 1,
 	.endianness		= 1,
 	.non_legacy_dai_naming	= 1,
 };

 const struct regmap_config ad193x_regmap_config = {
 	.max_register = AD193X_NUM_REGS - 1,
 };
 EXPORT_SYMBOL_GPL(ad193x_regmap_config);

 int ad193x_probe(struct device *dev, struct regmap *regmap,
 		 enum ad193x_type type)
 {
 	struct ad193x_priv *ad193x;

 	if (IS_ERR(regmap))
 		return PTR_ERR(regmap);

 	ad193x = devm_kzalloc(dev, sizeof(*ad193x), GFP_KERNEL);
 	if (ad193x == NULL)
 		return -ENOMEM;

 	ad193x->regmap = regmap;
 	ad193x->type = type;

 	dev_set_drvdata(dev, ad193x);

 	if (ad193x_has_adc(ad193x))
 		return devm_snd_soc_register_component(dev, &soc_component_dev_ad193x,
 						       &ad193x_dai, 1);
 	return devm_snd_soc_register_component(dev, &soc_component_dev_ad193x,
 		&ad193x_no_adc_dai, 1);
 }
 EXPORT_SYMBOL_GPL(ad193x_probe);

 MODULE_DESCRIPTION("ASoC ad193x driver");
 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* AD193X Audio Codec driver supporting AD1936/7/8/9
	*
	* Copyright 2010 Analog Devices Inc.
	*/

	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/device.h>
	#include <linux/regmap.h>
	#include <linux/slab.h>
	#include <sound/core.h>
	#include <sound/pcm.h>
	#include <sound/pcm_params.h>
	#include <sound/initval.h>
	#include <sound/soc.h>
	#include <sound/tlv.h>

	#include "ad193x.h"

	/* codec private data */
	struct ad193x_priv {
	struct regmap *regmap;
	enum ad193x_type type;
	int sysclk;
	};

	/*
	* AD193X volume/mute/de-emphasis etc. controls
	*/
	static const char * const ad193x_deemp[] = {"None", "48kHz", "44.1kHz", "32kHz"};

	static SOC_ENUM_SINGLE_DECL(ad193x_deemp_enum, AD193X_DAC_CTRL2, 1,
	ad193x_deemp);

	static const DECLARE_TLV_DB_MINMAX(adau193x_tlv, -9563, 0);

	static const unsigned int ad193x_sb[] = {32};

	static struct snd_pcm_hw_constraint_list constr = {
	.list = ad193x_sb,
	.count = ARRAY_SIZE(ad193x_sb),
	};

	static const struct snd_kcontrol_new ad193x_snd_controls[] = {
	/* DAC volume control */
	SOC_DOUBLE_R_TLV("DAC1 Volume", AD193X_DAC_L1_VOL,
	AD193X_DAC_R1_VOL, 0, 0xFF, 1, adau193x_tlv),
	SOC_DOUBLE_R_TLV("DAC2 Volume", AD193X_DAC_L2_VOL,
	AD193X_DAC_R2_VOL, 0, 0xFF, 1, adau193x_tlv),
	SOC_DOUBLE_R_TLV("DAC3 Volume", AD193X_DAC_L3_VOL,
	AD193X_DAC_R3_VOL, 0, 0xFF, 1, adau193x_tlv),
	SOC_DOUBLE_R_TLV("DAC4 Volume", AD193X_DAC_L4_VOL,
	AD193X_DAC_R4_VOL, 0, 0xFF, 1, adau193x_tlv),

	/* DAC switch control */
	SOC_DOUBLE("DAC1 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL1_MUTE,
	AD193X_DACR1_MUTE, 1, 1),
	SOC_DOUBLE("DAC2 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL2_MUTE,
	AD193X_DACR2_MUTE, 1, 1),
	SOC_DOUBLE("DAC3 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL3_MUTE,
	AD193X_DACR3_MUTE, 1, 1),
	SOC_DOUBLE("DAC4 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL4_MUTE,
	AD193X_DACR4_MUTE, 1, 1),

	/* DAC de-emphasis */
	SOC_ENUM("Playback Deemphasis", ad193x_deemp_enum),
	};

	static const struct snd_kcontrol_new ad193x_adc_snd_controls[] = {
	/* ADC switch control */
	SOC_DOUBLE("ADC1 Switch", AD193X_ADC_CTRL0, AD193X_ADCL1_MUTE,
	AD193X_ADCR1_MUTE, 1, 1),
	SOC_DOUBLE("ADC2 Switch", AD193X_ADC_CTRL0, AD193X_ADCL2_MUTE,
	AD193X_ADCR2_MUTE, 1, 1),

	/* ADC high-pass filter */
	SOC_SINGLE("ADC High Pass Filter Switch", AD193X_ADC_CTRL0,
	AD193X_ADC_HIGHPASS_FILTER, 1, 0),
	};

	static const struct snd_soc_dapm_widget ad193x_dapm_widgets[] = {
	SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_PGA("DAC Output", AD193X_DAC_CTRL0, 0, 1, NULL, 0),
	SND_SOC_DAPM_SUPPLY("PLL_PWR", AD193X_PLL_CLK_CTRL0, 0, 1, NULL, 0),
	SND_SOC_DAPM_SUPPLY("SYSCLK", AD193X_PLL_CLK_CTRL0, 7, 0, NULL, 0),
	SND_SOC_DAPM_VMID("VMID"),
	SND_SOC_DAPM_OUTPUT("DAC1OUT"),
	SND_SOC_DAPM_OUTPUT("DAC2OUT"),
	SND_SOC_DAPM_OUTPUT("DAC3OUT"),
	SND_SOC_DAPM_OUTPUT("DAC4OUT"),
	};

	static const struct snd_soc_dapm_widget ad193x_adc_widgets[] = {
	SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_SUPPLY("ADC_PWR", AD193X_ADC_CTRL0, 0, 1, NULL, 0),
	SND_SOC_DAPM_INPUT("ADC1IN"),
	SND_SOC_DAPM_INPUT("ADC2IN"),
	};

	static int ad193x_check_pll(struct snd_soc_dapm_widget *source,
	struct snd_soc_dapm_widget *sink)
	{
	struct snd_soc_component *component = snd_soc_dapm_to_component(source->dapm);
	struct ad193x_priv *ad193x = snd_soc_component_get_drvdata(component);

	return !!ad193x->sysclk;
	}

	static const struct snd_soc_dapm_route audio_paths[] = {
	{ "DAC", NULL, "SYSCLK" },
	{ "DAC Output", NULL, "DAC" },
	{ "DAC Output", NULL, "VMID" },
	{ "DAC1OUT", NULL, "DAC Output" },
	{ "DAC2OUT", NULL, "DAC Output" },
	{ "DAC3OUT", NULL, "DAC Output" },
	{ "DAC4OUT", NULL, "DAC Output" },
	{ "SYSCLK", NULL, "PLL_PWR", &ad193x_check_pll },
	};

	static const struct snd_soc_dapm_route ad193x_adc_audio_paths[] = {
	{ "ADC", NULL, "SYSCLK" },
	{ "ADC", NULL, "ADC_PWR" },
	{ "ADC", NULL, "ADC1IN" },
	{ "ADC", NULL, "ADC2IN" },
	};

	static inline bool ad193x_has_adc(const struct ad193x_priv *ad193x)
	{
	switch (ad193x->type) {
	case AD1933:
	case AD1934:
	return false;
	default:
	break;
	}

	return true;
	}

	/*
	* DAI ops entries
	*/

	static int ad193x_mute(struct snd_soc_dai *dai, int mute, int direction)
	{
	struct ad193x_priv *ad193x = snd_soc_component_get_drvdata(dai->component);

	if (mute)
	regmap_update_bits(ad193x->regmap, AD193X_DAC_CTRL2,
	AD193X_DAC_MASTER_MUTE,
	AD193X_DAC_MASTER_MUTE);
	else
	regmap_update_bits(ad193x->regmap, AD193X_DAC_CTRL2,
	AD193X_DAC_MASTER_MUTE, 0);

	return 0;
	}

	static int ad193x_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
	unsigned int rx_mask, int slots, int width)
	{
	struct ad193x_priv *ad193x = snd_soc_component_get_drvdata(dai->component);
	unsigned int channels;

	switch (slots) {
	case 2:
	channels = AD193X_2_CHANNELS;
	break;
	case 4:
	channels = AD193X_4_CHANNELS;
	break;
	case 8:
	channels = AD193X_8_CHANNELS;
	break;
	case 16:
	channels = AD193X_16_CHANNELS;
	break;
	default:
	return -EINVAL;
	}

	regmap_update_bits(ad193x->regmap, AD193X_DAC_CTRL1,
	AD193X_DAC_CHAN_MASK, channels << AD193X_DAC_CHAN_SHFT);
	if (ad193x_has_adc(ad193x))
	regmap_update_bits(ad193x->regmap, AD193X_ADC_CTRL2,
	AD193X_ADC_CHAN_MASK,
	channels << AD193X_ADC_CHAN_SHFT);

	return 0;
	}

	static int ad193x_set_dai_fmt(struct snd_soc_dai *codec_dai,
	unsigned int fmt)
	{
	struct ad193x_priv *ad193x = snd_soc_component_get_drvdata(codec_dai->component);
	unsigned int adc_serfmt = 0;
	unsigned int dac_serfmt = 0;
	unsigned int adc_fmt = 0;
	unsigned int dac_fmt = 0;

	/* At present, the driver only support AUX ADC mode(SND_SOC_DAIFMT_I2S
	* with TDM), ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A) and DAC I2S mode
	* (SND_SOC_DAIFMT_I2S)
	*/
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
	adc_serfmt \|= AD193X_ADC_SERFMT_TDM;
	dac_serfmt \|= AD193X_DAC_SERFMT_STEREO;
	break;
	case SND_SOC_DAIFMT_DSP_A:
	adc_serfmt \|= AD193X_ADC_SERFMT_AUX;
	dac_serfmt \|= AD193X_DAC_SERFMT_TDM;
	break;
	default:
	if (ad193x_has_adc(ad193x))
	return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF: /* normal bit clock + frame */
	break;
	case SND_SOC_DAIFMT_NB_IF: /* normal bclk + invert frm */
	adc_fmt \|= AD193X_ADC_LEFT_HIGH;
	dac_fmt \|= AD193X_DAC_LEFT_HIGH;
	break;
	case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal frm */
	adc_fmt \|= AD193X_ADC_BCLK_INV;
	dac_fmt \|= AD193X_DAC_BCLK_INV;
	break;
	case SND_SOC_DAIFMT_IB_IF: /* invert bclk + frm */
	adc_fmt \|= AD193X_ADC_LEFT_HIGH;
	adc_fmt \|= AD193X_ADC_BCLK_INV;
	dac_fmt \|= AD193X_DAC_LEFT_HIGH;
	dac_fmt \|= AD193X_DAC_BCLK_INV;
	break;
	default:
	return -EINVAL;
	}

	/* For DSP_, LRCLK's polarity must be inverted /
	if (fmt & SND_SOC_DAIFMT_DSP_A)
	dac_fmt ^= AD193X_DAC_LEFT_HIGH;

	switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
	case SND_SOC_DAIFMT_CBP_CFP:
	adc_fmt \|= AD193X_ADC_LCR_MASTER;
	adc_fmt \|= AD193X_ADC_BCLK_MASTER;
	dac_fmt \|= AD193X_DAC_LCR_MASTER;
	dac_fmt \|= AD193X_DAC_BCLK_MASTER;
	break;
	case SND_SOC_DAIFMT_CBC_CFP:
	adc_fmt \|= AD193X_ADC_LCR_MASTER;
	dac_fmt \|= AD193X_DAC_LCR_MASTER;
	break;
	case SND_SOC_DAIFMT_CBP_CFC:
	adc_fmt \|= AD193X_ADC_BCLK_MASTER;
	dac_fmt \|= AD193X_DAC_BCLK_MASTER;
	break;
	case SND_SOC_DAIFMT_CBC_CFC:
	break;
	default:
	return -EINVAL;
	}

	if (ad193x_has_adc(ad193x)) {
	regmap_update_bits(ad193x->regmap, AD193X_ADC_CTRL1,
	AD193X_ADC_SERFMT_MASK, adc_serfmt);
	regmap_update_bits(ad193x->regmap, AD193X_ADC_CTRL2,
	AD193X_ADC_FMT_MASK, adc_fmt);
	}
	regmap_update_bits(ad193x->regmap, AD193X_DAC_CTRL0,
	AD193X_DAC_SERFMT_MASK, dac_serfmt);
	regmap_update_bits(ad193x->regmap, AD193X_DAC_CTRL1,
	AD193X_DAC_FMT_MASK, dac_fmt);

	return 0;
	}

	static int ad193x_set_dai_sysclk(struct snd_soc_dai *codec_dai,
	int clk_id, unsigned int freq, int dir)
	{
	struct snd_soc_component *component = codec_dai->component;
	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
	struct ad193x_priv *ad193x = snd_soc_component_get_drvdata(component);

	if (clk_id == AD193X_SYSCLK_MCLK) {
	/* MCLK must be 512 x fs */
	if (dir == SND_SOC_CLOCK_OUT \|\| freq != 24576000)
	return -EINVAL;

	regmap_update_bits(ad193x->regmap, AD193X_PLL_CLK_CTRL1,
	AD193X_PLL_SRC_MASK,
	AD193X_PLL_DAC_SRC_MCLK \|
	AD193X_PLL_CLK_SRC_MCLK);

	snd_soc_dapm_sync(dapm);
	return 0;
	}
	switch (freq) {
	case 12288000:
	case 18432000:
	case 24576000:
	case 36864000:
	ad193x->sysclk = freq;
	return 0;
	}
	return -EINVAL;
	}

	static int ad193x_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct snd_soc_dai *dai)
	{
	int word_len = 0, master_rate = 0;
	struct snd_soc_component *component = dai->component;
	struct ad193x_priv *ad193x = snd_soc_component_get_drvdata(component);
	bool is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
	u8 dacc0;

	dev_dbg(dai->dev, "%s() rate=%u format=%#x width=%u channels=%u\n",
	__func__, params_rate(params), params_format(params),
	params_width(params), params_channels(params));


	/* bit size */
	switch (params_width(params)) {
	case 16:
	word_len = 3;
	break;
	case 20:
	word_len = 1;
	break;
	case 24:
	case 32:
	word_len = 0;
	break;
	}

	switch (ad193x->sysclk) {
	case 12288000:
	master_rate = AD193X_PLL_INPUT_256;
	break;
	case 18432000:
	master_rate = AD193X_PLL_INPUT_384;
	break;
	case 24576000:
	master_rate = AD193X_PLL_INPUT_512;
	break;
	case 36864000:
	master_rate = AD193X_PLL_INPUT_768;
	break;
	}

	if (is_playback) {
	switch (params_rate(params)) {
	case 48000:
	dacc0 = AD193X_DAC_SR_48;
	break;
	case 96000:
	dacc0 = AD193X_DAC_SR_96;
	break;
	case 192000:
	dacc0 = AD193X_DAC_SR_192;
	break;
	default:
	dev_err(dai->dev, "invalid sampling rate: %d\n", params_rate(params));
	return -EINVAL;
	}

	regmap_update_bits(ad193x->regmap, AD193X_DAC_CTRL0, AD193X_DAC_SR_MASK, dacc0);
	}

	regmap_update_bits(ad193x->regmap, AD193X_PLL_CLK_CTRL0,
	AD193X_PLL_INPUT_MASK, master_rate);

	regmap_update_bits(ad193x->regmap, AD193X_DAC_CTRL2,
	AD193X_DAC_WORD_LEN_MASK,
	word_len << AD193X_DAC_WORD_LEN_SHFT);

	if (ad193x_has_adc(ad193x))
	regmap_update_bits(ad193x->regmap, AD193X_ADC_CTRL1,
	AD193X_ADC_WORD_LEN_MASK, word_len);

	return 0;
	}

	static int ad193x_startup(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	return snd_pcm_hw_constraint_list(substream->runtime, 0,
	SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
	&constr);
	}

	static const struct snd_soc_dai_ops ad193x_dai_ops = {
	.startup = ad193x_startup,
	.hw_params = ad193x_hw_params,
	.mute_stream = ad193x_mute,
	.set_tdm_slot = ad193x_set_tdm_slot,
	.set_sysclk = ad193x_set_dai_sysclk,
	.set_fmt = ad193x_set_dai_fmt,
	.no_capture_mute = 1,
	};

	/* codec DAI instance */
	static struct snd_soc_dai_driver ad193x_dai = {
	.name = "ad193x-hifi",
	.playback = {
	.stream_name = "Playback",
	.channels_min = 2,
	.channels_max = 8,
	.rates = SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_96000 \| SNDRV_PCM_RATE_192000,
	.formats = SNDRV_PCM_FMTBIT_S32_LE \| SNDRV_PCM_FMTBIT_S16_LE \|
	SNDRV_PCM_FMTBIT_S20_3LE \| SNDRV_PCM_FMTBIT_S24_LE,
	},
	.capture = {
	.stream_name = "Capture",
	.channels_min = 2,
	.channels_max = 4,
	.rates = SNDRV_PCM_RATE_48000,
	.formats = SNDRV_PCM_FMTBIT_S32_LE \| SNDRV_PCM_FMTBIT_S16_LE \|
	SNDRV_PCM_FMTBIT_S20_3LE \| SNDRV_PCM_FMTBIT_S24_LE,
	},
	.ops = &ad193x_dai_ops,
	};

	/* codec DAI instance for DAC only */
	static struct snd_soc_dai_driver ad193x_no_adc_dai = {
	.name = "ad193x-hifi",
	.playback = {
	.stream_name = "Playback",
	.channels_min = 2,
	.channels_max = 8,
	.rates = SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_96000 \| SNDRV_PCM_RATE_192000,
	.formats = SNDRV_PCM_FMTBIT_S32_LE \| SNDRV_PCM_FMTBIT_S16_LE \|
	SNDRV_PCM_FMTBIT_S20_3LE \| SNDRV_PCM_FMTBIT_S24_LE,
	},
	.ops = &ad193x_dai_ops,
	};

	/* codec register values to set after reset */
	static void ad193x_reg_default_init(struct ad193x_priv *ad193x)
	{
	static const struct reg_sequence reg_init[] = {
	{ 0, 0x99 }, /* PLL_CLK_CTRL0: pll input: mclki/xi 12.288Mhz */
	{ 1, 0x04 }, /* PLL_CLK_CTRL1: no on-chip Vref */
	{ 2, 0x40 }, /* DAC_CTRL0: TDM mode */
	{ 3, 0x00 }, /* DAC_CTRL1: reset */
	{ 4, 0x1A }, /* DAC_CTRL2: 48kHz de-emphasis, unmute dac */
	{ 5, 0x00 }, /* DAC_CHNL_MUTE: unmute DAC channels */
	{ 6, 0x00 }, /* DAC_L1_VOL: no attenuation */
	{ 7, 0x00 }, /* DAC_R1_VOL: no attenuation */
	{ 8, 0x00 }, /* DAC_L2_VOL: no attenuation */
	{ 9, 0x00 }, /* DAC_R2_VOL: no attenuation */
	{ 10, 0x00 }, /* DAC_L3_VOL: no attenuation */
	{ 11, 0x00 }, /* DAC_R3_VOL: no attenuation */
	{ 12, 0x00 }, /* DAC_L4_VOL: no attenuation */
	{ 13, 0x00 }, /* DAC_R4_VOL: no attenuation */
	};
	static const struct reg_sequence reg_adc_init[] = {
	{ 14, 0x03 }, /* ADC_CTRL0: high-pass filter enable */
	{ 15, 0x43 }, /* ADC_CTRL1: sata delay=1, adc aux mode */
	{ 16, 0x00 }, /* ADC_CTRL2: reset */
	};

	regmap_multi_reg_write(ad193x->regmap, reg_init, ARRAY_SIZE(reg_init));

	if (ad193x_has_adc(ad193x)) {
	regmap_multi_reg_write(ad193x->regmap, reg_adc_init,
	ARRAY_SIZE(reg_adc_init));
	}
	}

	static int ad193x_component_probe(struct snd_soc_component *component)
	{
	struct ad193x_priv *ad193x = snd_soc_component_get_drvdata(component);
	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
	int num, ret;

	/* default setting for ad193x */
	ad193x_reg_default_init(ad193x);

	/* adc only */
	if (ad193x_has_adc(ad193x)) {
	/* add adc controls */
	num = ARRAY_SIZE(ad193x_adc_snd_controls);
	ret = snd_soc_add_component_controls(component,
	ad193x_adc_snd_controls,
	num);
	if (ret)
	return ret;

	/* add adc widgets */
	num = ARRAY_SIZE(ad193x_adc_widgets);
	ret = snd_soc_dapm_new_controls(dapm,
	ad193x_adc_widgets,
	num);
	if (ret)
	return ret;

	/* add adc routes */
	num = ARRAY_SIZE(ad193x_adc_audio_paths);
	ret = snd_soc_dapm_add_routes(dapm,
	ad193x_adc_audio_paths,
	num);
	if (ret)
	return ret;
	}

	return 0;
	}

	static const struct snd_soc_component_driver soc_component_dev_ad193x = {
	.probe = ad193x_component_probe,
	.controls = ad193x_snd_controls,
	.num_controls = ARRAY_SIZE(ad193x_snd_controls),
	.dapm_widgets = ad193x_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(ad193x_dapm_widgets),
	.dapm_routes = audio_paths,
	.num_dapm_routes = ARRAY_SIZE(audio_paths),
	.idle_bias_on = 1,
	.use_pmdown_time = 1,
	.endianness = 1,
	.non_legacy_dai_naming = 1,
	};

	const struct regmap_config ad193x_regmap_config = {
	.max_register = AD193X_NUM_REGS - 1,
	};
	EXPORT_SYMBOL_GPL(ad193x_regmap_config);

	int ad193x_probe(struct device dev, struct regmap regmap,
	enum ad193x_type type)
	{
	struct ad193x_priv *ad193x;

	if (IS_ERR(regmap))
	return PTR_ERR(regmap);

	ad193x = devm_kzalloc(dev, sizeof(*ad193x), GFP_KERNEL);
	if (ad193x == NULL)
	return -ENOMEM;

	ad193x->regmap = regmap;
	ad193x->type = type;

	dev_set_drvdata(dev, ad193x);

	if (ad193x_has_adc(ad193x))
	return devm_snd_soc_register_component(dev, &soc_component_dev_ad193x,
	&ad193x_dai, 1);
	return devm_snd_soc_register_component(dev, &soc_component_dev_ad193x,
	&ad193x_no_adc_dai, 1);
	}
	EXPORT_SYMBOL_GPL(ad193x_probe);

	MODULE_DESCRIPTION("ASoC ad193x driver");
	MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
	MODULE_LICENSE("GPL");