sound/soc/codecs/ad193x.c - kernel/msm-4.9 - Gitiles

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

 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
 #include <linux/i2c.h>
 #include <linux/spi/spi.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 <sound/soc-dapm.h>
 #include "ad193x.h"

 /* codec private data */
 struct ad193x_priv {
 	struct snd_soc_codec codec;
 	u8 reg_cache[AD193X_NUM_REGS];
 };

 /* ad193x register cache & default register settings */
 static const u8 ad193x_reg[AD193X_NUM_REGS] = {
 	0, 0, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0,
 };

 static struct snd_soc_codec *ad193x_codec;
 struct snd_soc_codec_device soc_codec_dev_ad193x;

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

 static const struct soc_enum ad193x_deemp_enum =
 	SOC_ENUM_SINGLE(AD193X_DAC_CTRL2, 1, 4, ad193x_deemp);

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

 	/* 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_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, "PLL_PWR" },
 	{ "ADC", NULL, "PLL_PWR" },
 	{ "DAC", NULL, "ADC_PWR" },
 	{ "ADC", NULL, "ADC_PWR" },
 	{ "DAC1OUT", "DAC1 Switch", "DAC" },
 	{ "DAC2OUT", "DAC2 Switch", "DAC" },
 	{ "DAC3OUT", "DAC3 Switch", "DAC" },
 	{ "DAC4OUT", "DAC4 Switch", "DAC" },
 	{ "ADC", "ADC1 Switch", "ADC1IN" },
 	{ "ADC", "ADC2 Switch", "ADC2IN" },
 };

 /*
  * DAI ops entries
  */

 static int ad193x_mute(struct snd_soc_dai *dai, int mute)
 {
 	struct snd_soc_codec *codec = dai->codec;
 	int reg;

 	reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
 	reg = (mute > 0) ? reg | AD193X_DAC_MASTER_MUTE : reg &
 		(~AD193X_DAC_MASTER_MUTE);
 	snd_soc_write(codec, AD193X_DAC_CTRL2, reg);

 	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 snd_soc_codec *codec = dai->codec;
 	int dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);
 	int adc_reg = snd_soc_read(codec, AD193X_ADC_CTRL2);

 	dac_reg &= ~AD193X_DAC_CHAN_MASK;
 	adc_reg &= ~AD193X_ADC_CHAN_MASK;

 	switch (slots) {
 	case 2:
 		dac_reg |= AD193X_DAC_2_CHANNELS << AD193X_DAC_CHAN_SHFT;
 		adc_reg |= AD193X_ADC_2_CHANNELS << AD193X_ADC_CHAN_SHFT;
 		break;
 	case 4:
 		dac_reg |= AD193X_DAC_4_CHANNELS << AD193X_DAC_CHAN_SHFT;
 		adc_reg |= AD193X_ADC_4_CHANNELS << AD193X_ADC_CHAN_SHFT;
 		break;
 	case 8:
 		dac_reg |= AD193X_DAC_8_CHANNELS << AD193X_DAC_CHAN_SHFT;
 		adc_reg |= AD193X_ADC_8_CHANNELS << AD193X_ADC_CHAN_SHFT;
 		break;
 	case 16:
 		dac_reg |= AD193X_DAC_16_CHANNELS << AD193X_DAC_CHAN_SHFT;
 		adc_reg |= AD193X_ADC_16_CHANNELS << AD193X_ADC_CHAN_SHFT;
 		break;
 	default:
 		return -EINVAL;
 	}

 	snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);
 	snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg);

 	return 0;
 }

 static int ad193x_set_dai_fmt(struct snd_soc_dai *codec_dai,
 		unsigned int fmt)
 {
 	struct snd_soc_codec *codec = codec_dai->codec;
 	int adc_reg1, adc_reg2, dac_reg;

 	adc_reg1 = snd_soc_read(codec, AD193X_ADC_CTRL1);
 	adc_reg2 = snd_soc_read(codec, AD193X_ADC_CTRL2);
 	dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);

 	/* 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_reg1 &= ~AD193X_ADC_SERFMT_MASK;
 		adc_reg1 |= AD193X_ADC_SERFMT_TDM;
 		break;
 	case SND_SOC_DAIFMT_DSP_A:
 		adc_reg1 &= ~AD193X_ADC_SERFMT_MASK;
 		adc_reg1 |= 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 */
 		adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
 		adc_reg2 &= ~AD193X_ADC_BCLK_INV;
 		dac_reg &= ~AD193X_DAC_LEFT_HIGH;
 		dac_reg &= ~AD193X_DAC_BCLK_INV;
 		break;
 	case SND_SOC_DAIFMT_NB_IF: /* normal bclk + invert frm */
 		adc_reg2 |= AD193X_ADC_LEFT_HIGH;
 		adc_reg2 &= ~AD193X_ADC_BCLK_INV;
 		dac_reg |= AD193X_DAC_LEFT_HIGH;
 		dac_reg &= ~AD193X_DAC_BCLK_INV;
 		break;
 	case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal frm */
 		adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
 		adc_reg2 |= AD193X_ADC_BCLK_INV;
 		dac_reg &= ~AD193X_DAC_LEFT_HIGH;
 		dac_reg |= AD193X_DAC_BCLK_INV;
 		break;

 	case SND_SOC_DAIFMT_IB_IF: /* invert bclk + frm */
 		adc_reg2 |= AD193X_ADC_LEFT_HIGH;
 		adc_reg2 |= AD193X_ADC_BCLK_INV;
 		dac_reg |= AD193X_DAC_LEFT_HIGH;
 		dac_reg |= 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_reg2 |= AD193X_ADC_LCR_MASTER;
 		adc_reg2 |= AD193X_ADC_BCLK_MASTER;
 		dac_reg |= AD193X_DAC_LCR_MASTER;
 		dac_reg |= AD193X_DAC_BCLK_MASTER;
 		break;
 	case SND_SOC_DAIFMT_CBS_CFM: /* codec clk slave & frm master */
 		adc_reg2 |= AD193X_ADC_LCR_MASTER;
 		adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
 		dac_reg |= AD193X_DAC_LCR_MASTER;
 		dac_reg &= ~AD193X_DAC_BCLK_MASTER;
 		break;
 	case SND_SOC_DAIFMT_CBM_CFS: /* codec clk master & frame slave */
 		adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
 		adc_reg2 |= AD193X_ADC_BCLK_MASTER;
 		dac_reg &= ~AD193X_DAC_LCR_MASTER;
 		dac_reg |= AD193X_DAC_BCLK_MASTER;
 		break;
 	case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */
 		adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
 		adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
 		dac_reg &= ~AD193X_DAC_LCR_MASTER;
 		dac_reg &= ~AD193X_DAC_BCLK_MASTER;
 		break;
 	default:
 		return -EINVAL;
 	}

 	snd_soc_write(codec, AD193X_ADC_CTRL1, adc_reg1);
 	snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg2);
 	snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);

 	return 0;
 }

 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, reg = 0;

 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_device *socdev = rtd->socdev;
 	struct snd_soc_codec *codec = socdev->card->codec;

 	/* bit size */
 	switch (params_format(params)) {
 	case SNDRV_PCM_FORMAT_S16_LE:
 		word_len = 3;
 		break;
 	case SNDRV_PCM_FORMAT_S20_3LE:
 		word_len = 1;
 		break;
 	case SNDRV_PCM_FORMAT_S24_LE:
 	case SNDRV_PCM_FORMAT_S32_LE:
 		word_len = 0;
 		break;
 	}

 	reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
 	reg = (reg & (~AD193X_DAC_WORD_LEN_MASK)) | word_len;
 	snd_soc_write(codec, AD193X_DAC_CTRL2, reg);

 	reg = snd_soc_read(codec, AD193X_ADC_CTRL1);
 	reg = (reg & (~AD193X_ADC_WORD_LEN_MASK)) | word_len;
 	snd_soc_write(codec, AD193X_ADC_CTRL1, reg);

 	return 0;
 }

 static int ad193x_bus_probe(struct device *dev, void *ctrl_data, int bus_type)
 {
 	struct snd_soc_codec *codec;
 	struct ad193x_priv *ad193x;
 	int ret;

 	if (ad193x_codec) {
 		dev_err(dev, "Another ad193x is registered\n");
 		return -EINVAL;
 	}

 	ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
 	if (ad193x == NULL)
 		return -ENOMEM;

 	dev_set_drvdata(dev, ad193x);

 	codec = &ad193x->codec;
 	mutex_init(&codec->mutex);
 	codec->control_data = ctrl_data;
 	codec->dev = dev;
 	snd_soc_codec_set_drvdata(codec, ad193x);
 	codec->reg_cache = ad193x->reg_cache;
 	codec->reg_cache_size = AD193X_NUM_REGS;
 	codec->name = "AD193X";
 	codec->owner = THIS_MODULE;
 	codec->dai = &ad193x_dai;
 	codec->num_dai = 1;
 	INIT_LIST_HEAD(&codec->dapm_widgets);
 	INIT_LIST_HEAD(&codec->dapm_paths);

 	ad193x_dai.dev = codec->dev;
 	ad193x_codec = codec;

 	memcpy(codec->reg_cache, ad193x_reg, AD193X_NUM_REGS);

 	if (bus_type == SND_SOC_I2C)
 		ret = snd_soc_codec_set_cache_io(codec, 8, 8, bus_type);
 	else
 		ret = snd_soc_codec_set_cache_io(codec, 16, 8, bus_type);
 	if (ret < 0) {
 		dev_err(codec->dev, "failed to set cache I/O: %d\n",
 				ret);
 		kfree(ad193x);
 		return ret;
 	}

 	/* default setting for ad193x */

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

 	ret = snd_soc_register_codec(codec);
 	if (ret != 0) {
 		dev_err(codec->dev, "Failed to register codec: %d\n", ret);
 		kfree(ad193x);
 		return ret;
 	}

 	ret = snd_soc_register_dai(&ad193x_dai);
 	if (ret != 0) {
 		dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
 		snd_soc_unregister_codec(codec);
 		kfree(ad193x);
 		return ret;
 	}

 	return 0;
 }

 static int ad193x_bus_remove(struct device *dev)
 {
 	struct ad193x_priv *ad193x = dev_get_drvdata(dev);

 	snd_soc_unregister_dai(&ad193x_dai);
 	snd_soc_unregister_codec(&ad193x->codec);
 	kfree(ad193x);
 	ad193x_codec = NULL;

 	return 0;
 }

 static 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_fmt = ad193x_set_dai_fmt,
 };

 /* codec DAI instance */
 struct snd_soc_dai ad193x_dai = {
 	.name = "AD193X",
 	.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,
 };
 EXPORT_SYMBOL_GPL(ad193x_dai);

 static int ad193x_probe(struct platform_device *pdev)
 {
 	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 	struct snd_soc_codec *codec;
 	int ret = 0;

 	if (ad193x_codec == NULL) {
 		dev_err(&pdev->dev, "Codec device not registered\n");
 		return -ENODEV;
 	}

 	socdev->card->codec = ad193x_codec;
 	codec = ad193x_codec;

 	/* register pcms */
 	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 	if (ret < 0) {
 		dev_err(codec->dev, "failed to create pcms: %d\n", ret);
 		goto pcm_err;
 	}

 	snd_soc_add_controls(codec, ad193x_snd_controls,
 			     ARRAY_SIZE(ad193x_snd_controls));
 	snd_soc_dapm_new_controls(codec, ad193x_dapm_widgets,
 				  ARRAY_SIZE(ad193x_dapm_widgets));
 	snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));

 pcm_err:
 	return ret;
 }

 /* power down chip */
 static int ad193x_remove(struct platform_device *pdev)
 {
 	struct snd_soc_device *socdev = platform_get_drvdata(pdev);

 	snd_soc_free_pcms(socdev);
 	snd_soc_dapm_free(socdev);

 	return 0;
 }

 struct snd_soc_codec_device soc_codec_dev_ad193x = {
 	.probe = 	ad193x_probe,
 	.remove = 	ad193x_remove,
 };
 EXPORT_SYMBOL_GPL(soc_codec_dev_ad193x);

 #if defined(CONFIG_SPI_MASTER)
 static int __devinit ad193x_spi_probe(struct spi_device *spi)
 {
 	return ad193x_bus_probe(&spi->dev, spi, SND_SOC_SPI);
 }

 static int __devexit ad193x_spi_remove(struct spi_device *spi)
 {
 	return ad193x_bus_remove(&spi->dev);
 }

 static struct spi_driver ad193x_spi_driver = {
 	.driver = {
 		.name	= "ad193x",
 		.owner	= THIS_MODULE,
 	},
 	.probe		= ad193x_spi_probe,
 	.remove		= __devexit_p(ad193x_spi_remove),
 };
 #endif

 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 static const struct i2c_device_id ad193x_id[] = {
 	{ "ad1936", 0 },
 	{ "ad1937", 0 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, ad193x_id);

 static int __devinit ad193x_i2c_probe(struct i2c_client *client,
 		const struct i2c_device_id *id)
 {
 	return ad193x_bus_probe(&client->dev, client, SND_SOC_I2C);
 }

 static int __devexit ad193x_i2c_remove(struct i2c_client *client)
 {
 	return ad193x_bus_remove(&client->dev);
 }

 static struct i2c_driver ad193x_i2c_driver = {
 	.driver = {
 		.name = "ad193x",
 	},
 	.probe    = ad193x_i2c_probe,
 	.remove   = __devexit_p(ad193x_i2c_remove),
 	.id_table = ad193x_id,
 };
 #endif

 static int __init ad193x_modinit(void)
 {
 	int ret;

 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 	ret =  i2c_add_driver(&ad193x_i2c_driver);
 	if (ret != 0) {
 		printk(KERN_ERR "Failed to register AD193X I2C driver: %d\n",
 				ret);
 	}
 #endif

 #if defined(CONFIG_SPI_MASTER)
 	ret = spi_register_driver(&ad193x_spi_driver);
 	if (ret != 0) {
 		printk(KERN_ERR "Failed to register AD193X SPI driver: %d\n",
 				ret);
 	}
 #endif
 	return ret;
 }
 module_init(ad193x_modinit);

 static void __exit ad193x_modexit(void)
 {
 #if defined(CONFIG_SPI_MASTER)
 	spi_unregister_driver(&ad193x_spi_driver);
 #endif

 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 	i2c_del_driver(&ad193x_i2c_driver);
 #endif
 }
 module_exit(ad193x_modexit);

 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/init.h>
	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/device.h>
	#include <linux/i2c.h>
	#include <linux/spi/spi.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 <sound/soc-dapm.h>
	#include "ad193x.h"

	/* codec private data */
	struct ad193x_priv {
	struct snd_soc_codec codec;
	u8 reg_cache[AD193X_NUM_REGS];
	};

	/* ad193x register cache & default register settings */
	static const u8 ad193x_reg[AD193X_NUM_REGS] = {
	0, 0, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0,
	};

	static struct snd_soc_codec *ad193x_codec;
	struct snd_soc_codec_device soc_codec_dev_ad193x;

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

	static const struct soc_enum ad193x_deemp_enum =
	SOC_ENUM_SINGLE(AD193X_DAC_CTRL2, 1, 4, ad193x_deemp);

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

	/* 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_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, "PLL_PWR" },
	{ "ADC", NULL, "PLL_PWR" },
	{ "DAC", NULL, "ADC_PWR" },
	{ "ADC", NULL, "ADC_PWR" },
	{ "DAC1OUT", "DAC1 Switch", "DAC" },
	{ "DAC2OUT", "DAC2 Switch", "DAC" },
	{ "DAC3OUT", "DAC3 Switch", "DAC" },
	{ "DAC4OUT", "DAC4 Switch", "DAC" },
	{ "ADC", "ADC1 Switch", "ADC1IN" },
	{ "ADC", "ADC2 Switch", "ADC2IN" },
	};

	/*
	* DAI ops entries
	*/

	static int ad193x_mute(struct snd_soc_dai *dai, int mute)
	{
	struct snd_soc_codec *codec = dai->codec;
	int reg;

	reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
	reg = (mute > 0) ? reg \| AD193X_DAC_MASTER_MUTE : reg &
	(~AD193X_DAC_MASTER_MUTE);
	snd_soc_write(codec, AD193X_DAC_CTRL2, reg);

	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 snd_soc_codec *codec = dai->codec;
	int dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);
	int adc_reg = snd_soc_read(codec, AD193X_ADC_CTRL2);

	dac_reg &= ~AD193X_DAC_CHAN_MASK;
	adc_reg &= ~AD193X_ADC_CHAN_MASK;

	switch (slots) {
	case 2:
	dac_reg \|= AD193X_DAC_2_CHANNELS << AD193X_DAC_CHAN_SHFT;
	adc_reg \|= AD193X_ADC_2_CHANNELS << AD193X_ADC_CHAN_SHFT;
	break;
	case 4:
	dac_reg \|= AD193X_DAC_4_CHANNELS << AD193X_DAC_CHAN_SHFT;
	adc_reg \|= AD193X_ADC_4_CHANNELS << AD193X_ADC_CHAN_SHFT;
	break;
	case 8:
	dac_reg \|= AD193X_DAC_8_CHANNELS << AD193X_DAC_CHAN_SHFT;
	adc_reg \|= AD193X_ADC_8_CHANNELS << AD193X_ADC_CHAN_SHFT;
	break;
	case 16:
	dac_reg \|= AD193X_DAC_16_CHANNELS << AD193X_DAC_CHAN_SHFT;
	adc_reg \|= AD193X_ADC_16_CHANNELS << AD193X_ADC_CHAN_SHFT;
	break;
	default:
	return -EINVAL;
	}

	snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);
	snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg);

	return 0;
	}

	static int ad193x_set_dai_fmt(struct snd_soc_dai *codec_dai,
	unsigned int fmt)
	{
	struct snd_soc_codec *codec = codec_dai->codec;
	int adc_reg1, adc_reg2, dac_reg;

	adc_reg1 = snd_soc_read(codec, AD193X_ADC_CTRL1);
	adc_reg2 = snd_soc_read(codec, AD193X_ADC_CTRL2);
	dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);

	/* 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_reg1 &= ~AD193X_ADC_SERFMT_MASK;
	adc_reg1 \|= AD193X_ADC_SERFMT_TDM;
	break;
	case SND_SOC_DAIFMT_DSP_A:
	adc_reg1 &= ~AD193X_ADC_SERFMT_MASK;
	adc_reg1 \|= 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 */
	adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
	adc_reg2 &= ~AD193X_ADC_BCLK_INV;
	dac_reg &= ~AD193X_DAC_LEFT_HIGH;
	dac_reg &= ~AD193X_DAC_BCLK_INV;
	break;
	case SND_SOC_DAIFMT_NB_IF: /* normal bclk + invert frm */
	adc_reg2 \|= AD193X_ADC_LEFT_HIGH;
	adc_reg2 &= ~AD193X_ADC_BCLK_INV;
	dac_reg \|= AD193X_DAC_LEFT_HIGH;
	dac_reg &= ~AD193X_DAC_BCLK_INV;
	break;
	case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal frm */
	adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
	adc_reg2 \|= AD193X_ADC_BCLK_INV;
	dac_reg &= ~AD193X_DAC_LEFT_HIGH;
	dac_reg \|= AD193X_DAC_BCLK_INV;
	break;

	case SND_SOC_DAIFMT_IB_IF: /* invert bclk + frm */
	adc_reg2 \|= AD193X_ADC_LEFT_HIGH;
	adc_reg2 \|= AD193X_ADC_BCLK_INV;
	dac_reg \|= AD193X_DAC_LEFT_HIGH;
	dac_reg \|= 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_reg2 \|= AD193X_ADC_LCR_MASTER;
	adc_reg2 \|= AD193X_ADC_BCLK_MASTER;
	dac_reg \|= AD193X_DAC_LCR_MASTER;
	dac_reg \|= AD193X_DAC_BCLK_MASTER;
	break;
	case SND_SOC_DAIFMT_CBS_CFM: /* codec clk slave & frm master */
	adc_reg2 \|= AD193X_ADC_LCR_MASTER;
	adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
	dac_reg \|= AD193X_DAC_LCR_MASTER;
	dac_reg &= ~AD193X_DAC_BCLK_MASTER;
	break;
	case SND_SOC_DAIFMT_CBM_CFS: /* codec clk master & frame slave */
	adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
	adc_reg2 \|= AD193X_ADC_BCLK_MASTER;
	dac_reg &= ~AD193X_DAC_LCR_MASTER;
	dac_reg \|= AD193X_DAC_BCLK_MASTER;
	break;
	case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */
	adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
	adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
	dac_reg &= ~AD193X_DAC_LCR_MASTER;
	dac_reg &= ~AD193X_DAC_BCLK_MASTER;
	break;
	default:
	return -EINVAL;
	}

	snd_soc_write(codec, AD193X_ADC_CTRL1, adc_reg1);
	snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg2);
	snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);

	return 0;
	}

	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, reg = 0;

	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
	struct snd_soc_codec *codec = socdev->card->codec;

	/* bit size */
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
	word_len = 3;
	break;
	case SNDRV_PCM_FORMAT_S20_3LE:
	word_len = 1;
	break;
	case SNDRV_PCM_FORMAT_S24_LE:
	case SNDRV_PCM_FORMAT_S32_LE:
	word_len = 0;
	break;
	}

	reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
	reg = (reg & (~AD193X_DAC_WORD_LEN_MASK)) \| word_len;
	snd_soc_write(codec, AD193X_DAC_CTRL2, reg);

	reg = snd_soc_read(codec, AD193X_ADC_CTRL1);
	reg = (reg & (~AD193X_ADC_WORD_LEN_MASK)) \| word_len;
	snd_soc_write(codec, AD193X_ADC_CTRL1, reg);

	return 0;
	}

	static int ad193x_bus_probe(struct device dev, void ctrl_data, int bus_type)
	{
	struct snd_soc_codec *codec;
	struct ad193x_priv *ad193x;
	int ret;

	if (ad193x_codec) {
	dev_err(dev, "Another ad193x is registered\n");
	return -EINVAL;
	}

	ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
	if (ad193x == NULL)
	return -ENOMEM;

	dev_set_drvdata(dev, ad193x);

	codec = &ad193x->codec;
	mutex_init(&codec->mutex);
	codec->control_data = ctrl_data;
	codec->dev = dev;
	snd_soc_codec_set_drvdata(codec, ad193x);
	codec->reg_cache = ad193x->reg_cache;
	codec->reg_cache_size = AD193X_NUM_REGS;
	codec->name = "AD193X";
	codec->owner = THIS_MODULE;
	codec->dai = &ad193x_dai;
	codec->num_dai = 1;
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	ad193x_dai.dev = codec->dev;
	ad193x_codec = codec;

	memcpy(codec->reg_cache, ad193x_reg, AD193X_NUM_REGS);

	if (bus_type == SND_SOC_I2C)
	ret = snd_soc_codec_set_cache_io(codec, 8, 8, bus_type);
	else
	ret = snd_soc_codec_set_cache_io(codec, 16, 8, bus_type);
	if (ret < 0) {
	dev_err(codec->dev, "failed to set cache I/O: %d\n",
	ret);
	kfree(ad193x);
	return ret;
	}

	/* default setting for ad193x */

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

	ret = snd_soc_register_codec(codec);
	if (ret != 0) {
	dev_err(codec->dev, "Failed to register codec: %d\n", ret);
	kfree(ad193x);
	return ret;
	}

	ret = snd_soc_register_dai(&ad193x_dai);
	if (ret != 0) {
	dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
	snd_soc_unregister_codec(codec);
	kfree(ad193x);
	return ret;
	}

	return 0;
	}

	static int ad193x_bus_remove(struct device *dev)
	{
	struct ad193x_priv *ad193x = dev_get_drvdata(dev);

	snd_soc_unregister_dai(&ad193x_dai);
	snd_soc_unregister_codec(&ad193x->codec);
	kfree(ad193x);
	ad193x_codec = NULL;

	return 0;
	}

	static 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_fmt = ad193x_set_dai_fmt,
	};

	/* codec DAI instance */
	struct snd_soc_dai ad193x_dai = {
	.name = "AD193X",
	.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,
	};
	EXPORT_SYMBOL_GPL(ad193x_dai);

	static int ad193x_probe(struct platform_device *pdev)
	{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec;
	int ret = 0;

	if (ad193x_codec == NULL) {
	dev_err(&pdev->dev, "Codec device not registered\n");
	return -ENODEV;
	}

	socdev->card->codec = ad193x_codec;
	codec = ad193x_codec;

	/* register pcms */
	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	if (ret < 0) {
	dev_err(codec->dev, "failed to create pcms: %d\n", ret);
	goto pcm_err;
	}

	snd_soc_add_controls(codec, ad193x_snd_controls,
	ARRAY_SIZE(ad193x_snd_controls));
	snd_soc_dapm_new_controls(codec, ad193x_dapm_widgets,
	ARRAY_SIZE(ad193x_dapm_widgets));
	snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));

	pcm_err:
	return ret;
	}

	/* power down chip */
	static int ad193x_remove(struct platform_device *pdev)
	{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);

	snd_soc_free_pcms(socdev);
	snd_soc_dapm_free(socdev);

	return 0;
	}

	struct snd_soc_codec_device soc_codec_dev_ad193x = {
	.probe = ad193x_probe,
	.remove = ad193x_remove,
	};
	EXPORT_SYMBOL_GPL(soc_codec_dev_ad193x);

	#if defined(CONFIG_SPI_MASTER)
	static int __devinit ad193x_spi_probe(struct spi_device *spi)
	{
	return ad193x_bus_probe(&spi->dev, spi, SND_SOC_SPI);
	}

	static int __devexit ad193x_spi_remove(struct spi_device *spi)
	{
	return ad193x_bus_remove(&spi->dev);
	}

	static struct spi_driver ad193x_spi_driver = {
	.driver = {
	.name = "ad193x",
	.owner = THIS_MODULE,
	},
	.probe = ad193x_spi_probe,
	.remove = __devexit_p(ad193x_spi_remove),
	};
	#endif

	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	static const struct i2c_device_id ad193x_id[] = {
	{ "ad1936", 0 },
	{ "ad1937", 0 },
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, ad193x_id);

	static int __devinit ad193x_i2c_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
	{
	return ad193x_bus_probe(&client->dev, client, SND_SOC_I2C);
	}

	static int __devexit ad193x_i2c_remove(struct i2c_client *client)
	{
	return ad193x_bus_remove(&client->dev);
	}

	static struct i2c_driver ad193x_i2c_driver = {
	.driver = {
	.name = "ad193x",
	},
	.probe = ad193x_i2c_probe,
	.remove = __devexit_p(ad193x_i2c_remove),
	.id_table = ad193x_id,
	};
	#endif

	static int __init ad193x_modinit(void)
	{
	int ret;

	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	ret = i2c_add_driver(&ad193x_i2c_driver);
	if (ret != 0) {
	printk(KERN_ERR "Failed to register AD193X I2C driver: %d\n",
	ret);
	}
	#endif

	#if defined(CONFIG_SPI_MASTER)
	ret = spi_register_driver(&ad193x_spi_driver);
	if (ret != 0) {
	printk(KERN_ERR "Failed to register AD193X SPI driver: %d\n",
	ret);
	}
	#endif
	return ret;
	}
	module_init(ad193x_modinit);

	static void __exit ad193x_modexit(void)
	{
	#if defined(CONFIG_SPI_MASTER)
	spi_unregister_driver(&ad193x_spi_driver);
	#endif

	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	i2c_del_driver(&ad193x_i2c_driver);
	#endif
	}
	module_exit(ad193x_modexit);

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