sound/soc/codecs/ad193x.c - pub/scm/linux/kernel/git/bwh/linux-stable - Git at Google

 /*
  * AD193X Audio Codec driver supporting AD1936/7/8/9
  *
  * Copyright 2010 Analog Devices Inc.
  *
  * Licensed under the GPL-2 or later.
  */

 #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;
 	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 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),

 	/* 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),

 	/* 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),

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

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

 static const struct snd_soc_dapm_widget ad193x_dapm_widgets[] = {
 	SND_SOC_DAPM_DAC("DAC", "Playback", AD193X_DAC_CTRL0, 0, 1),
 	SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_SUPPLY("PLL_PWR", AD193X_PLL_CLK_CTRL0, 0, 1, NULL, 0),
 	SND_SOC_DAPM_SUPPLY("ADC_PWR", AD193X_ADC_CTRL0, 0, 1, NULL, 0),
 	SND_SOC_DAPM_SUPPLY("SYSCLK", AD193X_PLL_CLK_CTRL0, 7, 0, NULL, 0),
 	SND_SOC_DAPM_OUTPUT("DAC1OUT"),
 	SND_SOC_DAPM_OUTPUT("DAC2OUT"),
 	SND_SOC_DAPM_OUTPUT("DAC3OUT"),
 	SND_SOC_DAPM_OUTPUT("DAC4OUT"),
 	SND_SOC_DAPM_INPUT("ADC1IN"),
 	SND_SOC_DAPM_INPUT("ADC2IN"),
 };

 static const struct snd_soc_dapm_route audio_paths[] = {
 	{ "DAC", NULL, "SYSCLK" },
 	{ "ADC", NULL, "SYSCLK" },
 	{ "DAC", NULL, "ADC_PWR" },
 	{ "ADC", NULL, "ADC_PWR" },
 	{ "DAC1OUT", NULL, "DAC" },
 	{ "DAC2OUT", NULL, "DAC" },
 	{ "DAC3OUT", NULL, "DAC" },
 	{ "DAC4OUT", NULL, "DAC" },
 	{ "ADC", NULL, "ADC1IN" },
 	{ "ADC", NULL, "ADC2IN" },
 	{ "SYSCLK", NULL, "PLL_PWR" },
 };

 /*
  * DAI ops entries
  */

 static int ad193x_mute(struct snd_soc_dai *dai, int mute)
 {
 	struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(dai->codec);

 	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_codec_get_drvdata(dai->codec);
 	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);
 	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_codec_get_drvdata(codec_dai->codec);
 	unsigned int adc_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) and ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A)
 	 */
 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 	case SND_SOC_DAIFMT_I2S:
 		adc_serfmt |= AD193X_ADC_SERFMT_TDM;
 		break;
 	case SND_SOC_DAIFMT_DSP_A:
 		adc_serfmt |= AD193X_ADC_SERFMT_AUX;
 		break;
 	default:
 		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;
 	}

 	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 	case SND_SOC_DAIFMT_CBM_CFM: /* codec clk & frm master */
 		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_CBS_CFM: /* codec clk slave & frm master */
 		adc_fmt |= AD193X_ADC_LCR_MASTER;
 		dac_fmt |= AD193X_DAC_LCR_MASTER;
 		break;
 	case SND_SOC_DAIFMT_CBM_CFS: /* codec clk master & frame slave */
 		adc_fmt |= AD193X_ADC_BCLK_MASTER;
 		dac_fmt |= AD193X_DAC_BCLK_MASTER;
 		break;
 	case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */
 		break;
 	default:
 		return -EINVAL;
 	}

 	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_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_codec *codec = codec_dai->codec;
 	struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
 	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_codec *codec = dai->codec;
 	struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);

 	/* 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;
 	}

 	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);

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

 	return 0;
 }

 static const struct snd_soc_dai_ops ad193x_dai_ops = {
 	.hw_params = ad193x_hw_params,
 	.digital_mute = ad193x_mute,
 	.set_tdm_slot = ad193x_set_tdm_slot,
 	.set_sysclk	= ad193x_set_dai_sysclk,
 	.set_fmt = ad193x_set_dai_fmt,
 };

 /* 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,
 		.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,
 };

 static int ad193x_codec_probe(struct snd_soc_codec *codec)
 {
 	struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);

 	/* default setting for ad193x */

 	/* unmute dac channels */
 	regmap_write(ad193x->regmap, AD193X_DAC_CHNL_MUTE, 0x0);
 	/* de-emphasis: 48kHz, powedown dac */
 	regmap_write(ad193x->regmap, AD193X_DAC_CTRL2, 0x1A);
 	/* powerdown dac, dac in tdm mode */
 	regmap_write(ad193x->regmap, AD193X_DAC_CTRL0, 0x41);
 	/* high-pass filter enable */
 	regmap_write(ad193x->regmap, AD193X_ADC_CTRL0, 0x3);
 	/* sata delay=1, adc aux mode */
 	regmap_write(ad193x->regmap, AD193X_ADC_CTRL1, 0x43);
 	/* pll input: mclki/xi */
 	regmap_write(ad193x->regmap, AD193X_PLL_CLK_CTRL0, 0x99); /* mclk=24.576Mhz: 0x9D; mclk=12.288Mhz: 0x99 */
 	regmap_write(ad193x->regmap, AD193X_PLL_CLK_CTRL1, 0x04);

 	return 0;
 }

 static struct snd_soc_codec_driver soc_codec_dev_ad193x = {
 	.probe = ad193x_codec_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),
 };

 static bool adau193x_reg_volatile(struct device *dev, unsigned int reg)
 {
 	return false;
 }

 const struct regmap_config ad193x_regmap_config = {
 	.max_register = AD193X_NUM_REGS - 1,
 	.volatile_reg = adau193x_reg_volatile,
 };
 EXPORT_SYMBOL_GPL(ad193x_regmap_config);

 int ad193x_probe(struct device *dev, struct regmap *regmap)
 {
 	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;

 	dev_set_drvdata(dev, ad193x);

 	return snd_soc_register_codec(dev, &soc_codec_dev_ad193x,
 		&ad193x_dai, 1);
 }
 EXPORT_SYMBOL_GPL(ad193x_probe);

 MODULE_DESCRIPTION("ASoC ad193x driver");
 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 MODULE_LICENSE("GPL");
	/*
	* AD193X Audio Codec driver supporting AD1936/7/8/9
	*
	* Copyright 2010 Analog Devices Inc.
	*
	* Licensed under the GPL-2 or later.
	*/

	#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;
	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 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),

	/* 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),

	/* 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),

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

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

	static const struct snd_soc_dapm_widget ad193x_dapm_widgets[] = {
	SND_SOC_DAPM_DAC("DAC", "Playback", AD193X_DAC_CTRL0, 0, 1),
	SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_SUPPLY("PLL_PWR", AD193X_PLL_CLK_CTRL0, 0, 1, NULL, 0),
	SND_SOC_DAPM_SUPPLY("ADC_PWR", AD193X_ADC_CTRL0, 0, 1, NULL, 0),
	SND_SOC_DAPM_SUPPLY("SYSCLK", AD193X_PLL_CLK_CTRL0, 7, 0, NULL, 0),
	SND_SOC_DAPM_OUTPUT("DAC1OUT"),
	SND_SOC_DAPM_OUTPUT("DAC2OUT"),
	SND_SOC_DAPM_OUTPUT("DAC3OUT"),
	SND_SOC_DAPM_OUTPUT("DAC4OUT"),
	SND_SOC_DAPM_INPUT("ADC1IN"),
	SND_SOC_DAPM_INPUT("ADC2IN"),
	};

	static const struct snd_soc_dapm_route audio_paths[] = {
	{ "DAC", NULL, "SYSCLK" },
	{ "ADC", NULL, "SYSCLK" },
	{ "DAC", NULL, "ADC_PWR" },
	{ "ADC", NULL, "ADC_PWR" },
	{ "DAC1OUT", NULL, "DAC" },
	{ "DAC2OUT", NULL, "DAC" },
	{ "DAC3OUT", NULL, "DAC" },
	{ "DAC4OUT", NULL, "DAC" },
	{ "ADC", NULL, "ADC1IN" },
	{ "ADC", NULL, "ADC2IN" },
	{ "SYSCLK", NULL, "PLL_PWR" },
	};

	/*
	* DAI ops entries
	*/

	static int ad193x_mute(struct snd_soc_dai *dai, int mute)
	{
	struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(dai->codec);

	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_codec_get_drvdata(dai->codec);
	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);
	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_codec_get_drvdata(codec_dai->codec);
	unsigned int adc_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) and ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A)
	*/
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
	adc_serfmt \|= AD193X_ADC_SERFMT_TDM;
	break;
	case SND_SOC_DAIFMT_DSP_A:
	adc_serfmt \|= AD193X_ADC_SERFMT_AUX;
	break;
	default:
	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;
	}

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM: /* codec clk & frm master */
	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_CBS_CFM: /* codec clk slave & frm master */
	adc_fmt \|= AD193X_ADC_LCR_MASTER;
	dac_fmt \|= AD193X_DAC_LCR_MASTER;
	break;
	case SND_SOC_DAIFMT_CBM_CFS: /* codec clk master & frame slave */
	adc_fmt \|= AD193X_ADC_BCLK_MASTER;
	dac_fmt \|= AD193X_DAC_BCLK_MASTER;
	break;
	case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */
	break;
	default:
	return -EINVAL;
	}

	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_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_codec *codec = codec_dai->codec;
	struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
	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_codec *codec = dai->codec;
	struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);

	/* 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;
	}

	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);

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

	return 0;
	}

	static const struct snd_soc_dai_ops ad193x_dai_ops = {
	.hw_params = ad193x_hw_params,
	.digital_mute = ad193x_mute,
	.set_tdm_slot = ad193x_set_tdm_slot,
	.set_sysclk = ad193x_set_dai_sysclk,
	.set_fmt = ad193x_set_dai_fmt,
	};

	/* 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,
	.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,
	};

	static int ad193x_codec_probe(struct snd_soc_codec *codec)
	{
	struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);

	/* default setting for ad193x */

	/* unmute dac channels */
	regmap_write(ad193x->regmap, AD193X_DAC_CHNL_MUTE, 0x0);
	/* de-emphasis: 48kHz, powedown dac */
	regmap_write(ad193x->regmap, AD193X_DAC_CTRL2, 0x1A);
	/* powerdown dac, dac in tdm mode */
	regmap_write(ad193x->regmap, AD193X_DAC_CTRL0, 0x41);
	/* high-pass filter enable */
	regmap_write(ad193x->regmap, AD193X_ADC_CTRL0, 0x3);
	/* sata delay=1, adc aux mode */
	regmap_write(ad193x->regmap, AD193X_ADC_CTRL1, 0x43);
	/* pll input: mclki/xi */
	regmap_write(ad193x->regmap, AD193X_PLL_CLK_CTRL0, 0x99); /* mclk=24.576Mhz: 0x9D; mclk=12.288Mhz: 0x99 */
	regmap_write(ad193x->regmap, AD193X_PLL_CLK_CTRL1, 0x04);

	return 0;
	}

	static struct snd_soc_codec_driver soc_codec_dev_ad193x = {
	.probe = ad193x_codec_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),
	};

	static bool adau193x_reg_volatile(struct device *dev, unsigned int reg)
	{
	return false;
	}

	const struct regmap_config ad193x_regmap_config = {
	.max_register = AD193X_NUM_REGS - 1,
	.volatile_reg = adau193x_reg_volatile,
	};
	EXPORT_SYMBOL_GPL(ad193x_regmap_config);

	int ad193x_probe(struct device dev, struct regmap regmap)
	{
	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;

	dev_set_drvdata(dev, ad193x);

	return snd_soc_register_codec(dev, &soc_codec_dev_ad193x,
	&ad193x_dai, 1);
	}
	EXPORT_SYMBOL_GPL(ad193x_probe);

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