sound/soc/codecs/jz4740.c - kernel/lockdown - Git at Google

 /*
  * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
  *  You should have received a copy of the  GNU General Public License along
  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  *  675 Mass Ave, Cambridge, MA 02139, USA.
  *
  */

 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/io.h>
 #include <linux/regmap.h>

 #include <linux/delay.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>

 #define JZ4740_REG_CODEC_1 0x0
 #define JZ4740_REG_CODEC_2 0x4

 #define JZ4740_CODEC_1_LINE_ENABLE BIT(29)
 #define JZ4740_CODEC_1_MIC_ENABLE BIT(28)
 #define JZ4740_CODEC_1_SW1_ENABLE BIT(27)
 #define JZ4740_CODEC_1_ADC_ENABLE BIT(26)
 #define JZ4740_CODEC_1_SW2_ENABLE BIT(25)
 #define JZ4740_CODEC_1_DAC_ENABLE BIT(24)
 #define JZ4740_CODEC_1_VREF_DISABLE BIT(20)
 #define JZ4740_CODEC_1_VREF_AMP_DISABLE BIT(19)
 #define JZ4740_CODEC_1_VREF_PULLDOWN BIT(18)
 #define JZ4740_CODEC_1_VREF_LOW_CURRENT BIT(17)
 #define JZ4740_CODEC_1_VREF_HIGH_CURRENT BIT(16)
 #define JZ4740_CODEC_1_HEADPHONE_DISABLE BIT(14)
 #define JZ4740_CODEC_1_HEADPHONE_AMP_CHANGE_ANY BIT(13)
 #define JZ4740_CODEC_1_HEADPHONE_CHARGE BIT(12)
 #define JZ4740_CODEC_1_HEADPHONE_PULLDOWN (BIT(11) | BIT(10))
 #define JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M BIT(9)
 #define JZ4740_CODEC_1_HEADPHONE_POWERDOWN BIT(8)
 #define JZ4740_CODEC_1_SUSPEND BIT(1)
 #define JZ4740_CODEC_1_RESET BIT(0)

 #define JZ4740_CODEC_1_LINE_ENABLE_OFFSET 29
 #define JZ4740_CODEC_1_MIC_ENABLE_OFFSET 28
 #define JZ4740_CODEC_1_SW1_ENABLE_OFFSET 27
 #define JZ4740_CODEC_1_ADC_ENABLE_OFFSET 26
 #define JZ4740_CODEC_1_SW2_ENABLE_OFFSET 25
 #define JZ4740_CODEC_1_DAC_ENABLE_OFFSET 24
 #define JZ4740_CODEC_1_HEADPHONE_DISABLE_OFFSET 14
 #define JZ4740_CODEC_1_HEADPHONE_POWERDOWN_OFFSET 8

 #define JZ4740_CODEC_2_INPUT_VOLUME_MASK		0x1f0000
 #define JZ4740_CODEC_2_SAMPLE_RATE_MASK			0x000f00
 #define JZ4740_CODEC_2_MIC_BOOST_GAIN_MASK		0x000030
 #define JZ4740_CODEC_2_HEADPHONE_VOLUME_MASK	0x000003

 #define JZ4740_CODEC_2_INPUT_VOLUME_OFFSET		16
 #define JZ4740_CODEC_2_SAMPLE_RATE_OFFSET		 8
 #define JZ4740_CODEC_2_MIC_BOOST_GAIN_OFFSET	 4
 #define JZ4740_CODEC_2_HEADPHONE_VOLUME_OFFSET	 0

 static const struct reg_default jz4740_codec_reg_defaults[] = {
 	{ JZ4740_REG_CODEC_1, 0x021b2302 },
 	{ JZ4740_REG_CODEC_2, 0x00170803 },
 };

 struct jz4740_codec {
 	struct regmap *regmap;
 };

 static const unsigned int jz4740_mic_tlv[] = {
 	TLV_DB_RANGE_HEAD(2),
 	0, 2, TLV_DB_SCALE_ITEM(0, 600, 0),
 	3, 3, TLV_DB_SCALE_ITEM(2000, 0, 0),
 };

 static const DECLARE_TLV_DB_SCALE(jz4740_out_tlv, 0, 200, 0);
 static const DECLARE_TLV_DB_SCALE(jz4740_in_tlv, -3450, 150, 0);

 static const struct snd_kcontrol_new jz4740_codec_controls[] = {
 	SOC_SINGLE_TLV("Master Playback Volume", JZ4740_REG_CODEC_2,
 			JZ4740_CODEC_2_HEADPHONE_VOLUME_OFFSET, 3, 0,
 			jz4740_out_tlv),
 	SOC_SINGLE_TLV("Master Capture Volume", JZ4740_REG_CODEC_2,
 			JZ4740_CODEC_2_INPUT_VOLUME_OFFSET, 31, 0,
 			jz4740_in_tlv),
 	SOC_SINGLE("Master Playback Switch", JZ4740_REG_CODEC_1,
 			JZ4740_CODEC_1_HEADPHONE_DISABLE_OFFSET, 1, 1),
 	SOC_SINGLE_TLV("Mic Capture Volume", JZ4740_REG_CODEC_2,
 			JZ4740_CODEC_2_MIC_BOOST_GAIN_OFFSET, 3, 0,
 			jz4740_mic_tlv),
 };

 static const struct snd_kcontrol_new jz4740_codec_output_controls[] = {
 	SOC_DAPM_SINGLE("Bypass Switch", JZ4740_REG_CODEC_1,
 			JZ4740_CODEC_1_SW1_ENABLE_OFFSET, 1, 0),
 	SOC_DAPM_SINGLE("DAC Switch", JZ4740_REG_CODEC_1,
 			JZ4740_CODEC_1_SW2_ENABLE_OFFSET, 1, 0),
 };

 static const struct snd_kcontrol_new jz4740_codec_input_controls[] = {
 	SOC_DAPM_SINGLE("Line Capture Switch", JZ4740_REG_CODEC_1,
 			JZ4740_CODEC_1_LINE_ENABLE_OFFSET, 1, 0),
 	SOC_DAPM_SINGLE("Mic Capture Switch", JZ4740_REG_CODEC_1,
 			JZ4740_CODEC_1_MIC_ENABLE_OFFSET, 1, 0),
 };

 static const struct snd_soc_dapm_widget jz4740_codec_dapm_widgets[] = {
 	SND_SOC_DAPM_ADC("ADC", "Capture", JZ4740_REG_CODEC_1,
 			JZ4740_CODEC_1_ADC_ENABLE_OFFSET, 0),
 	SND_SOC_DAPM_DAC("DAC", "Playback", JZ4740_REG_CODEC_1,
 			JZ4740_CODEC_1_DAC_ENABLE_OFFSET, 0),

 	SND_SOC_DAPM_MIXER("Output Mixer", JZ4740_REG_CODEC_1,
 			JZ4740_CODEC_1_HEADPHONE_POWERDOWN_OFFSET, 1,
 			jz4740_codec_output_controls,
 			ARRAY_SIZE(jz4740_codec_output_controls)),

 	SND_SOC_DAPM_MIXER_NAMED_CTL("Input Mixer", SND_SOC_NOPM, 0, 0,
 			jz4740_codec_input_controls,
 			ARRAY_SIZE(jz4740_codec_input_controls)),
 	SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),

 	SND_SOC_DAPM_OUTPUT("LOUT"),
 	SND_SOC_DAPM_OUTPUT("ROUT"),

 	SND_SOC_DAPM_INPUT("MIC"),
 	SND_SOC_DAPM_INPUT("LIN"),
 	SND_SOC_DAPM_INPUT("RIN"),
 };

 static const struct snd_soc_dapm_route jz4740_codec_dapm_routes[] = {
 	{"Line Input", NULL, "LIN"},
 	{"Line Input", NULL, "RIN"},

 	{"Input Mixer", "Line Capture Switch", "Line Input"},
 	{"Input Mixer", "Mic Capture Switch", "MIC"},

 	{"ADC", NULL, "Input Mixer"},

 	{"Output Mixer", "Bypass Switch", "Input Mixer"},
 	{"Output Mixer", "DAC Switch", "DAC"},

 	{"LOUT", NULL, "Output Mixer"},
 	{"ROUT", NULL, "Output Mixer"},
 };

 static int jz4740_codec_hw_params(struct snd_pcm_substream *substream,
 	struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 {
 	struct jz4740_codec *jz4740_codec = snd_soc_codec_get_drvdata(dai->codec);
 	uint32_t val;

 	switch (params_rate(params)) {
 	case 8000:
 		val = 0;
 		break;
 	case 11025:
 		val = 1;
 		break;
 	case 12000:
 		val = 2;
 		break;
 	case 16000:
 		val = 3;
 		break;
 	case 22050:
 		val = 4;
 		break;
 	case 24000:
 		val = 5;
 		break;
 	case 32000:
 		val = 6;
 		break;
 	case 44100:
 		val = 7;
 		break;
 	case 48000:
 		val = 8;
 		break;
 	default:
 		return -EINVAL;
 	}

 	val <<= JZ4740_CODEC_2_SAMPLE_RATE_OFFSET;

 	regmap_update_bits(jz4740_codec->regmap, JZ4740_REG_CODEC_2,
 				JZ4740_CODEC_2_SAMPLE_RATE_MASK, val);

 	return 0;
 }

 static const struct snd_soc_dai_ops jz4740_codec_dai_ops = {
 	.hw_params = jz4740_codec_hw_params,
 };

 static struct snd_soc_dai_driver jz4740_codec_dai = {
 	.name = "jz4740-hifi",
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 2,
 		.channels_max = 2,
 		.rates = SNDRV_PCM_RATE_8000_48000,
 		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
 	},
 	.capture = {
 		.stream_name = "Capture",
 		.channels_min = 2,
 		.channels_max = 2,
 		.rates = SNDRV_PCM_RATE_8000_48000,
 		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
 	},
 	.ops = &jz4740_codec_dai_ops,
 	.symmetric_rates = 1,
 };

 static void jz4740_codec_wakeup(struct regmap *regmap)
 {
 	regmap_update_bits(regmap, JZ4740_REG_CODEC_1,
 		JZ4740_CODEC_1_RESET, JZ4740_CODEC_1_RESET);
 	udelay(2);

 	regmap_update_bits(regmap, JZ4740_REG_CODEC_1,
 		JZ4740_CODEC_1_SUSPEND | JZ4740_CODEC_1_RESET, 0);

 	regcache_sync(regmap);
 }

 static int jz4740_codec_set_bias_level(struct snd_soc_codec *codec,
 	enum snd_soc_bias_level level)
 {
 	struct jz4740_codec *jz4740_codec = snd_soc_codec_get_drvdata(codec);
 	struct regmap *regmap = jz4740_codec->regmap;
 	unsigned int mask;
 	unsigned int value;

 	switch (level) {
 	case SND_SOC_BIAS_ON:
 		break;
 	case SND_SOC_BIAS_PREPARE:
 		mask = JZ4740_CODEC_1_VREF_DISABLE |
 				JZ4740_CODEC_1_VREF_AMP_DISABLE |
 				JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
 		value = 0;

 		regmap_update_bits(regmap, JZ4740_REG_CODEC_1, mask, value);
 		break;
 	case SND_SOC_BIAS_STANDBY:
 		/* The only way to clear the suspend flag is to reset the codec */
 		if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
 			jz4740_codec_wakeup(regmap);

 		mask = JZ4740_CODEC_1_VREF_DISABLE |
 			JZ4740_CODEC_1_VREF_AMP_DISABLE |
 			JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
 		value = JZ4740_CODEC_1_VREF_DISABLE |
 			JZ4740_CODEC_1_VREF_AMP_DISABLE |
 			JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;

 		regmap_update_bits(regmap, JZ4740_REG_CODEC_1, mask, value);
 		break;
 	case SND_SOC_BIAS_OFF:
 		mask = JZ4740_CODEC_1_SUSPEND;
 		value = JZ4740_CODEC_1_SUSPEND;

 		regmap_update_bits(regmap, JZ4740_REG_CODEC_1, mask, value);
 		regcache_mark_dirty(regmap);
 		break;
 	default:
 		break;
 	}

 	codec->dapm.bias_level = level;

 	return 0;
 }

 static int jz4740_codec_dev_probe(struct snd_soc_codec *codec)
 {
 	struct jz4740_codec *jz4740_codec = snd_soc_codec_get_drvdata(codec);

 	regmap_update_bits(jz4740_codec->regmap, JZ4740_REG_CODEC_1,
 			JZ4740_CODEC_1_SW2_ENABLE, JZ4740_CODEC_1_SW2_ENABLE);

 	return 0;
 }

 static struct snd_soc_codec_driver soc_codec_dev_jz4740_codec = {
 	.probe = jz4740_codec_dev_probe,
 	.set_bias_level = jz4740_codec_set_bias_level,
 	.suspend_bias_off = true,

 	.controls = jz4740_codec_controls,
 	.num_controls = ARRAY_SIZE(jz4740_codec_controls),
 	.dapm_widgets = jz4740_codec_dapm_widgets,
 	.num_dapm_widgets = ARRAY_SIZE(jz4740_codec_dapm_widgets),
 	.dapm_routes = jz4740_codec_dapm_routes,
 	.num_dapm_routes = ARRAY_SIZE(jz4740_codec_dapm_routes),
 };

 static const struct regmap_config jz4740_codec_regmap_config = {
 	.reg_bits = 32,
 	.reg_stride = 4,
 	.val_bits = 32,
 	.max_register = JZ4740_REG_CODEC_2,

 	.reg_defaults = jz4740_codec_reg_defaults,
 	.num_reg_defaults = ARRAY_SIZE(jz4740_codec_reg_defaults),
 	.cache_type = REGCACHE_RBTREE,
 };

 static int jz4740_codec_probe(struct platform_device *pdev)
 {
 	int ret;
 	struct jz4740_codec *jz4740_codec;
 	struct resource *mem;
 	void __iomem *base;

 	jz4740_codec = devm_kzalloc(&pdev->dev, sizeof(*jz4740_codec),
 				    GFP_KERNEL);
 	if (!jz4740_codec)
 		return -ENOMEM;

 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	base = devm_ioremap_resource(&pdev->dev, mem);
 	if (IS_ERR(base))
 		return PTR_ERR(base);

 	jz4740_codec->regmap = devm_regmap_init_mmio(&pdev->dev, base,
 					    &jz4740_codec_regmap_config);
 	if (IS_ERR(jz4740_codec->regmap))
 		return PTR_ERR(jz4740_codec->regmap);

 	platform_set_drvdata(pdev, jz4740_codec);

 	ret = snd_soc_register_codec(&pdev->dev,
 			&soc_codec_dev_jz4740_codec, &jz4740_codec_dai, 1);
 	if (ret)
 		dev_err(&pdev->dev, "Failed to register codec\n");

 	return ret;
 }

 static int jz4740_codec_remove(struct platform_device *pdev)
 {
 	snd_soc_unregister_codec(&pdev->dev);

 	return 0;
 }

 static struct platform_driver jz4740_codec_driver = {
 	.probe = jz4740_codec_probe,
 	.remove = jz4740_codec_remove,
 	.driver = {
 		.name = "jz4740-codec",
 	},
 };

 module_platform_driver(jz4740_codec_driver);

 MODULE_DESCRIPTION("JZ4740 SoC internal codec driver");
 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 MODULE_LICENSE("GPL v2");
 MODULE_ALIAS("platform:jz4740-codec");
	/*
	* Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program; if not, write to the Free Software Foundation, Inc.,
	* 675 Mass Ave, Cambridge, MA 02139, USA.
	*
	*/

	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/slab.h>
	#include <linux/io.h>
	#include <linux/regmap.h>

	#include <linux/delay.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>

	#define JZ4740_REG_CODEC_1 0x0
	#define JZ4740_REG_CODEC_2 0x4

	#define JZ4740_CODEC_1_LINE_ENABLE BIT(29)
	#define JZ4740_CODEC_1_MIC_ENABLE BIT(28)
	#define JZ4740_CODEC_1_SW1_ENABLE BIT(27)
	#define JZ4740_CODEC_1_ADC_ENABLE BIT(26)
	#define JZ4740_CODEC_1_SW2_ENABLE BIT(25)
	#define JZ4740_CODEC_1_DAC_ENABLE BIT(24)
	#define JZ4740_CODEC_1_VREF_DISABLE BIT(20)
	#define JZ4740_CODEC_1_VREF_AMP_DISABLE BIT(19)
	#define JZ4740_CODEC_1_VREF_PULLDOWN BIT(18)
	#define JZ4740_CODEC_1_VREF_LOW_CURRENT BIT(17)
	#define JZ4740_CODEC_1_VREF_HIGH_CURRENT BIT(16)
	#define JZ4740_CODEC_1_HEADPHONE_DISABLE BIT(14)
	#define JZ4740_CODEC_1_HEADPHONE_AMP_CHANGE_ANY BIT(13)
	#define JZ4740_CODEC_1_HEADPHONE_CHARGE BIT(12)
	#define JZ4740_CODEC_1_HEADPHONE_PULLDOWN (BIT(11) \| BIT(10))
	#define JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M BIT(9)
	#define JZ4740_CODEC_1_HEADPHONE_POWERDOWN BIT(8)
	#define JZ4740_CODEC_1_SUSPEND BIT(1)
	#define JZ4740_CODEC_1_RESET BIT(0)

	#define JZ4740_CODEC_1_LINE_ENABLE_OFFSET 29
	#define JZ4740_CODEC_1_MIC_ENABLE_OFFSET 28
	#define JZ4740_CODEC_1_SW1_ENABLE_OFFSET 27
	#define JZ4740_CODEC_1_ADC_ENABLE_OFFSET 26
	#define JZ4740_CODEC_1_SW2_ENABLE_OFFSET 25
	#define JZ4740_CODEC_1_DAC_ENABLE_OFFSET 24
	#define JZ4740_CODEC_1_HEADPHONE_DISABLE_OFFSET 14
	#define JZ4740_CODEC_1_HEADPHONE_POWERDOWN_OFFSET 8

	#define JZ4740_CODEC_2_INPUT_VOLUME_MASK 0x1f0000
	#define JZ4740_CODEC_2_SAMPLE_RATE_MASK 0x000f00
	#define JZ4740_CODEC_2_MIC_BOOST_GAIN_MASK 0x000030
	#define JZ4740_CODEC_2_HEADPHONE_VOLUME_MASK 0x000003

	#define JZ4740_CODEC_2_INPUT_VOLUME_OFFSET 16
	#define JZ4740_CODEC_2_SAMPLE_RATE_OFFSET 8
	#define JZ4740_CODEC_2_MIC_BOOST_GAIN_OFFSET 4
	#define JZ4740_CODEC_2_HEADPHONE_VOLUME_OFFSET 0

	static const struct reg_default jz4740_codec_reg_defaults[] = {
	{ JZ4740_REG_CODEC_1, 0x021b2302 },
	{ JZ4740_REG_CODEC_2, 0x00170803 },
	};

	struct jz4740_codec {
	struct regmap *regmap;
	};

	static const unsigned int jz4740_mic_tlv[] = {
	TLV_DB_RANGE_HEAD(2),
	0, 2, TLV_DB_SCALE_ITEM(0, 600, 0),
	3, 3, TLV_DB_SCALE_ITEM(2000, 0, 0),
	};

	static const DECLARE_TLV_DB_SCALE(jz4740_out_tlv, 0, 200, 0);
	static const DECLARE_TLV_DB_SCALE(jz4740_in_tlv, -3450, 150, 0);

	static const struct snd_kcontrol_new jz4740_codec_controls[] = {
	SOC_SINGLE_TLV("Master Playback Volume", JZ4740_REG_CODEC_2,
	JZ4740_CODEC_2_HEADPHONE_VOLUME_OFFSET, 3, 0,
	jz4740_out_tlv),
	SOC_SINGLE_TLV("Master Capture Volume", JZ4740_REG_CODEC_2,
	JZ4740_CODEC_2_INPUT_VOLUME_OFFSET, 31, 0,
	jz4740_in_tlv),
	SOC_SINGLE("Master Playback Switch", JZ4740_REG_CODEC_1,
	JZ4740_CODEC_1_HEADPHONE_DISABLE_OFFSET, 1, 1),
	SOC_SINGLE_TLV("Mic Capture Volume", JZ4740_REG_CODEC_2,
	JZ4740_CODEC_2_MIC_BOOST_GAIN_OFFSET, 3, 0,
	jz4740_mic_tlv),
	};

	static const struct snd_kcontrol_new jz4740_codec_output_controls[] = {
	SOC_DAPM_SINGLE("Bypass Switch", JZ4740_REG_CODEC_1,
	JZ4740_CODEC_1_SW1_ENABLE_OFFSET, 1, 0),
	SOC_DAPM_SINGLE("DAC Switch", JZ4740_REG_CODEC_1,
	JZ4740_CODEC_1_SW2_ENABLE_OFFSET, 1, 0),
	};

	static const struct snd_kcontrol_new jz4740_codec_input_controls[] = {
	SOC_DAPM_SINGLE("Line Capture Switch", JZ4740_REG_CODEC_1,
	JZ4740_CODEC_1_LINE_ENABLE_OFFSET, 1, 0),
	SOC_DAPM_SINGLE("Mic Capture Switch", JZ4740_REG_CODEC_1,
	JZ4740_CODEC_1_MIC_ENABLE_OFFSET, 1, 0),
	};

	static const struct snd_soc_dapm_widget jz4740_codec_dapm_widgets[] = {
	SND_SOC_DAPM_ADC("ADC", "Capture", JZ4740_REG_CODEC_1,
	JZ4740_CODEC_1_ADC_ENABLE_OFFSET, 0),
	SND_SOC_DAPM_DAC("DAC", "Playback", JZ4740_REG_CODEC_1,
	JZ4740_CODEC_1_DAC_ENABLE_OFFSET, 0),

	SND_SOC_DAPM_MIXER("Output Mixer", JZ4740_REG_CODEC_1,
	JZ4740_CODEC_1_HEADPHONE_POWERDOWN_OFFSET, 1,
	jz4740_codec_output_controls,
	ARRAY_SIZE(jz4740_codec_output_controls)),

	SND_SOC_DAPM_MIXER_NAMED_CTL("Input Mixer", SND_SOC_NOPM, 0, 0,
	jz4740_codec_input_controls,
	ARRAY_SIZE(jz4740_codec_input_controls)),
	SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),

	SND_SOC_DAPM_OUTPUT("LOUT"),
	SND_SOC_DAPM_OUTPUT("ROUT"),

	SND_SOC_DAPM_INPUT("MIC"),
	SND_SOC_DAPM_INPUT("LIN"),
	SND_SOC_DAPM_INPUT("RIN"),
	};

	static const struct snd_soc_dapm_route jz4740_codec_dapm_routes[] = {
	{"Line Input", NULL, "LIN"},
	{"Line Input", NULL, "RIN"},

	{"Input Mixer", "Line Capture Switch", "Line Input"},
	{"Input Mixer", "Mic Capture Switch", "MIC"},

	{"ADC", NULL, "Input Mixer"},

	{"Output Mixer", "Bypass Switch", "Input Mixer"},
	{"Output Mixer", "DAC Switch", "DAC"},

	{"LOUT", NULL, "Output Mixer"},
	{"ROUT", NULL, "Output Mixer"},
	};

	static int jz4740_codec_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params params, struct snd_soc_dai dai)
	{
	struct jz4740_codec *jz4740_codec = snd_soc_codec_get_drvdata(dai->codec);
	uint32_t val;

	switch (params_rate(params)) {
	case 8000:
	val = 0;
	break;
	case 11025:
	val = 1;
	break;
	case 12000:
	val = 2;
	break;
	case 16000:
	val = 3;
	break;
	case 22050:
	val = 4;
	break;
	case 24000:
	val = 5;
	break;
	case 32000:
	val = 6;
	break;
	case 44100:
	val = 7;
	break;
	case 48000:
	val = 8;
	break;
	default:
	return -EINVAL;
	}

	val <<= JZ4740_CODEC_2_SAMPLE_RATE_OFFSET;

	regmap_update_bits(jz4740_codec->regmap, JZ4740_REG_CODEC_2,
	JZ4740_CODEC_2_SAMPLE_RATE_MASK, val);

	return 0;
	}

	static const struct snd_soc_dai_ops jz4740_codec_dai_ops = {
	.hw_params = jz4740_codec_hw_params,
	};

	static struct snd_soc_dai_driver jz4740_codec_dai = {
	.name = "jz4740-hifi",
	.playback = {
	.stream_name = "Playback",
	.channels_min = 2,
	.channels_max = 2,
	.rates = SNDRV_PCM_RATE_8000_48000,
	.formats = SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S8,
	},
	.capture = {
	.stream_name = "Capture",
	.channels_min = 2,
	.channels_max = 2,
	.rates = SNDRV_PCM_RATE_8000_48000,
	.formats = SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S8,
	},
	.ops = &jz4740_codec_dai_ops,
	.symmetric_rates = 1,
	};

	static void jz4740_codec_wakeup(struct regmap *regmap)
	{
	regmap_update_bits(regmap, JZ4740_REG_CODEC_1,
	JZ4740_CODEC_1_RESET, JZ4740_CODEC_1_RESET);
	udelay(2);

	regmap_update_bits(regmap, JZ4740_REG_CODEC_1,
	JZ4740_CODEC_1_SUSPEND \| JZ4740_CODEC_1_RESET, 0);

	regcache_sync(regmap);
	}

	static int jz4740_codec_set_bias_level(struct snd_soc_codec *codec,
	enum snd_soc_bias_level level)
	{
	struct jz4740_codec *jz4740_codec = snd_soc_codec_get_drvdata(codec);
	struct regmap *regmap = jz4740_codec->regmap;
	unsigned int mask;
	unsigned int value;

	switch (level) {
	case SND_SOC_BIAS_ON:
	break;
	case SND_SOC_BIAS_PREPARE:
	mask = JZ4740_CODEC_1_VREF_DISABLE \|
	JZ4740_CODEC_1_VREF_AMP_DISABLE \|
	JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
	value = 0;

	regmap_update_bits(regmap, JZ4740_REG_CODEC_1, mask, value);
	break;
	case SND_SOC_BIAS_STANDBY:
	/* The only way to clear the suspend flag is to reset the codec */
	if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
	jz4740_codec_wakeup(regmap);

	mask = JZ4740_CODEC_1_VREF_DISABLE \|
	JZ4740_CODEC_1_VREF_AMP_DISABLE \|
	JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
	value = JZ4740_CODEC_1_VREF_DISABLE \|
	JZ4740_CODEC_1_VREF_AMP_DISABLE \|
	JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;

	regmap_update_bits(regmap, JZ4740_REG_CODEC_1, mask, value);
	break;
	case SND_SOC_BIAS_OFF:
	mask = JZ4740_CODEC_1_SUSPEND;
	value = JZ4740_CODEC_1_SUSPEND;

	regmap_update_bits(regmap, JZ4740_REG_CODEC_1, mask, value);
	regcache_mark_dirty(regmap);
	break;
	default:
	break;
	}

	codec->dapm.bias_level = level;

	return 0;
	}

	static int jz4740_codec_dev_probe(struct snd_soc_codec *codec)
	{
	struct jz4740_codec *jz4740_codec = snd_soc_codec_get_drvdata(codec);

	regmap_update_bits(jz4740_codec->regmap, JZ4740_REG_CODEC_1,
	JZ4740_CODEC_1_SW2_ENABLE, JZ4740_CODEC_1_SW2_ENABLE);

	return 0;
	}

	static struct snd_soc_codec_driver soc_codec_dev_jz4740_codec = {
	.probe = jz4740_codec_dev_probe,
	.set_bias_level = jz4740_codec_set_bias_level,
	.suspend_bias_off = true,

	.controls = jz4740_codec_controls,
	.num_controls = ARRAY_SIZE(jz4740_codec_controls),
	.dapm_widgets = jz4740_codec_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(jz4740_codec_dapm_widgets),
	.dapm_routes = jz4740_codec_dapm_routes,
	.num_dapm_routes = ARRAY_SIZE(jz4740_codec_dapm_routes),
	};

	static const struct regmap_config jz4740_codec_regmap_config = {
	.reg_bits = 32,
	.reg_stride = 4,
	.val_bits = 32,
	.max_register = JZ4740_REG_CODEC_2,

	.reg_defaults = jz4740_codec_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(jz4740_codec_reg_defaults),
	.cache_type = REGCACHE_RBTREE,
	};

	static int jz4740_codec_probe(struct platform_device *pdev)
	{
	int ret;
	struct jz4740_codec *jz4740_codec;
	struct resource *mem;
	void __iomem *base;

	jz4740_codec = devm_kzalloc(&pdev->dev, sizeof(*jz4740_codec),
	GFP_KERNEL);
	if (!jz4740_codec)
	return -ENOMEM;

	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	base = devm_ioremap_resource(&pdev->dev, mem);
	if (IS_ERR(base))
	return PTR_ERR(base);

	jz4740_codec->regmap = devm_regmap_init_mmio(&pdev->dev, base,
	&jz4740_codec_regmap_config);
	if (IS_ERR(jz4740_codec->regmap))
	return PTR_ERR(jz4740_codec->regmap);

	platform_set_drvdata(pdev, jz4740_codec);

	ret = snd_soc_register_codec(&pdev->dev,
	&soc_codec_dev_jz4740_codec, &jz4740_codec_dai, 1);
	if (ret)
	dev_err(&pdev->dev, "Failed to register codec\n");

	return ret;
	}

	static int jz4740_codec_remove(struct platform_device *pdev)
	{
	snd_soc_unregister_codec(&pdev->dev);

	return 0;
	}

	static struct platform_driver jz4740_codec_driver = {
	.probe = jz4740_codec_probe,
	.remove = jz4740_codec_remove,
	.driver = {
	.name = "jz4740-codec",
	},
	};

	module_platform_driver(jz4740_codec_driver);

	MODULE_DESCRIPTION("JZ4740 SoC internal codec driver");
	MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
	MODULE_LICENSE("GPL v2");
	MODULE_ALIAS("platform:jz4740-codec");