Commit 0c516b4f authored by Nicolin Chen's avatar Nicolin Chen Committed by Mark Brown
Browse files

ASoC: cs42xx8: Add codec driver support for CS42448/CS42888 



This patch adds support for the Cirrus Logic CS42448/CS42888 Audio CODEC that
has six/four 24-bit AD and eight 24-bit DA converters.

[ CS42448/CS42888 supports both I2C and SPI control ports. As initial patch,
  this patch only adds the support for I2C. ]

Signed-off-by: default avatarNicolin Chen <Guangyu.Chen@freescale.com>
Acked-by: default avatarBrian Austin <brian.austin@cirrus.com>
Acked-by: default avatarPaul Handrigan <Paul.Handrigan@cirrus.com>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent 38dbfb59

Documentation/devicetree/bindings/sound/cs42xx8.txt

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CS42448/CS42888 audio CODEC



Required properties:



  - compatible : must contain one of "cirrus,cs42448" and "cirrus,cs42888"



  - reg : the I2C address of the device for I2C



  - clocks : a list of phandles + clock-specifiers, one for each entry in

    clock-names



  - clock-names : must contain "mclk"



  - VA-supply, VD-supply, VLS-supply, VLC-supply: power supplies for the device,

    as covered in Documentation/devicetree/bindings/regulator/regulator.txt



Example:



codec: cs42888@48 {

	compatible = "cirrus,cs42888";

	reg = <0x48>;

	clocks = <&codec_mclk 0>;

	clock-names = "mclk";

	VA-supply = <&reg_audio>;

	VD-supply = <&reg_audio>;

	VLS-supply = <&reg_audio>;

	VLC-supply = <&reg_audio>;

};

sound/soc/codecs/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ config SND_SOC_ALL_CODECS 
	select SND_SOC_CS42L73 if I2C

	select SND_SOC_CS4270 if I2C

	select SND_SOC_CS4271 if SND_SOC_I2C_AND_SPI

	select SND_SOC_CS42XX8_I2C if I2C

	select SND_SOC_CX20442 if TTY

	select SND_SOC_DA7210 if I2C

	select SND_SOC_DA7213 if I2C
@@ -254,6 +255,15 @@ config SND_SOC_CS4270_VD33_ERRATA 
config SND_SOC_CS4271

	tristate



config SND_SOC_CS42XX8

	tristate



config SND_SOC_CS42XX8_I2C

	tristate "Cirrus Logic CS42448/CS42888 CODEC (I2C)"

	depends on I2C

	select SND_SOC_CS42XX8

	select REGMAP_I2C



config SND_SOC_CX20442

	tristate

	depends on TTY

sound/soc/codecs/Makefile

+4 −0
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@@ -23,6 +23,8 @@ snd-soc-cs42l52-objs := cs42l52.o 
snd-soc-cs42l73-objs := cs42l73.o

snd-soc-cs4270-objs := cs4270.o

snd-soc-cs4271-objs := cs4271.o

snd-soc-cs42xx8-objs := cs42xx8.o

snd-soc-cs42xx8-i2c-objs := cs42xx8-i2c.o

snd-soc-cx20442-objs := cx20442.o

snd-soc-da7210-objs := da7210.o

snd-soc-da7213-objs := da7213.o
@@ -156,6 +158,8 @@ obj-$(CONFIG_SND_SOC_CS42L52) += snd-soc-cs42l52.o 
obj-$(CONFIG_SND_SOC_CS42L73)	+= snd-soc-cs42l73.o

obj-$(CONFIG_SND_SOC_CS4270)	+= snd-soc-cs4270.o

obj-$(CONFIG_SND_SOC_CS4271)	+= snd-soc-cs4271.o

obj-$(CONFIG_SND_SOC_CS42XX8)	+= snd-soc-cs42xx8.o

obj-$(CONFIG_SND_SOC_CS42XX8_I2C) += snd-soc-cs42xx8-i2c.o

obj-$(CONFIG_SND_SOC_CX20442)	+= snd-soc-cx20442.o

obj-$(CONFIG_SND_SOC_DA7210)	+= snd-soc-da7210.o

obj-$(CONFIG_SND_SOC_DA7213)	+= snd-soc-da7213.o

sound/soc/codecs/cs42xx8-i2c.c

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/*

 * Cirrus Logic CS42448/CS42888 Audio CODEC DAI I2C driver

 *

 * Copyright (C) 2014 Freescale Semiconductor, Inc.

 *

 * Author: Nicolin Chen <Guangyu.Chen@freescale.com>

 *

 * This file is licensed under the terms of the GNU General Public License

 * version 2. This program is licensed "as is" without any warranty of any

 * kind, whether express or implied.

 */



#include <linux/i2c.h>

#include <linux/module.h>

#include <linux/pm_runtime.h>

#include <sound/soc.h>



#include "cs42xx8.h"



static int cs42xx8_i2c_probe(struct i2c_client *i2c,

			     const struct i2c_device_id *id)

{

	u32 ret = cs42xx8_probe(&i2c->dev,

			devm_regmap_init_i2c(i2c, &cs42xx8_regmap_config));

	if (ret)

		return ret;



	pm_runtime_enable(&i2c->dev);

	pm_request_idle(&i2c->dev);



	return 0;

}



static int cs42xx8_i2c_remove(struct i2c_client *i2c)

{

	snd_soc_unregister_codec(&i2c->dev);

	pm_runtime_disable(&i2c->dev);



	return 0;

}



static struct i2c_device_id cs42xx8_i2c_id[] = {

	{"cs42448", (kernel_ulong_t)&cs42448_data},

	{"cs42888", (kernel_ulong_t)&cs42888_data},

	{}

};

MODULE_DEVICE_TABLE(i2c, cs42xx8_i2c_id);



static struct i2c_driver cs42xx8_i2c_driver = {

	.driver = {

		.name = "cs42xx8",

		.owner = THIS_MODULE,

		.pm = &cs42xx8_pm,

	},

	.probe = cs42xx8_i2c_probe,

	.remove = cs42xx8_i2c_remove,

	.id_table = cs42xx8_i2c_id,

};



module_i2c_driver(cs42xx8_i2c_driver);



MODULE_DESCRIPTION("Cirrus Logic CS42448/CS42888 ALSA SoC Codec I2C Driver");

MODULE_AUTHOR("Freescale Semiconductor, Inc.");

MODULE_LICENSE("GPL");

sound/soc/codecs/cs42xx8.c

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/*

 * Cirrus Logic CS42448/CS42888 Audio CODEC Digital Audio Interface (DAI) driver

 *

 * Copyright (C) 2014 Freescale Semiconductor, Inc.

 *

 * Author: Nicolin Chen <Guangyu.Chen@freescale.com>

 *

 * This file is licensed under the terms of the GNU General Public License

 * version 2. This program is licensed "as is" without any warranty of any

 * kind, whether express or implied.

 */



#include <linux/clk.h>

#include <linux/delay.h>

#include <linux/module.h>

#include <linux/of_device.h>

#include <linux/pm_runtime.h>

#include <linux/regulator/consumer.h>

#include <sound/pcm_params.h>

#include <sound/soc.h>

#include <sound/tlv.h>



#include "cs42xx8.h"



#define CS42XX8_NUM_SUPPLIES 4

static const char *const cs42xx8_supply_names[CS42XX8_NUM_SUPPLIES] = {

	"VA",

	"VD",

	"VLS",

	"VLC",

};



#define CS42XX8_FORMATS	(SNDRV_PCM_FMTBIT_S16_LE | \

			 SNDRV_PCM_FMTBIT_S20_3LE | \

			 SNDRV_PCM_FMTBIT_S24_LE | \

			 SNDRV_PCM_FMTBIT_S32_LE)



/* codec private data */

struct cs42xx8_priv {

	struct regulator_bulk_data supplies[CS42XX8_NUM_SUPPLIES];

	const struct cs42xx8_driver_data *drvdata;

	struct regmap *regmap;

	struct clk *clk;



	bool slave_mode;

	unsigned long sysclk;

};



/* -127.5dB to 0dB with step of 0.5dB */

static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);

/* -64dB to 24dB with step of 0.5dB */

static const DECLARE_TLV_DB_SCALE(adc_tlv, -6400, 50, 0);



static const char *const cs42xx8_adc_single[] = { "Differential", "Single-Ended" };

static const char *const cs42xx8_szc[] = { "Immediate Change", "Zero Cross",

					"Soft Ramp", "Soft Ramp on Zero Cross" };



static const struct soc_enum adc1_single_enum =

	SOC_ENUM_SINGLE(CS42XX8_ADCCTL, 4, 2, cs42xx8_adc_single);

static const struct soc_enum adc2_single_enum =

	SOC_ENUM_SINGLE(CS42XX8_ADCCTL, 3, 2, cs42xx8_adc_single);

static const struct soc_enum adc3_single_enum =

	SOC_ENUM_SINGLE(CS42XX8_ADCCTL, 2, 2, cs42xx8_adc_single);

static const struct soc_enum dac_szc_enum =

	SOC_ENUM_SINGLE(CS42XX8_TXCTL, 5, 4, cs42xx8_szc);

static const struct soc_enum adc_szc_enum =

	SOC_ENUM_SINGLE(CS42XX8_TXCTL, 0, 4, cs42xx8_szc);



static const struct snd_kcontrol_new cs42xx8_snd_controls[] = {

	SOC_DOUBLE_R_TLV("DAC1 Playback Volume", CS42XX8_VOLAOUT1,

			 CS42XX8_VOLAOUT2, 0, 0xff, 1, dac_tlv),

	SOC_DOUBLE_R_TLV("DAC2 Playback Volume", CS42XX8_VOLAOUT3,

			 CS42XX8_VOLAOUT4, 0, 0xff, 1, dac_tlv),

	SOC_DOUBLE_R_TLV("DAC3 Playback Volume", CS42XX8_VOLAOUT5,

			 CS42XX8_VOLAOUT6, 0, 0xff, 1, dac_tlv),

	SOC_DOUBLE_R_TLV("DAC4 Playback Volume", CS42XX8_VOLAOUT7,

			 CS42XX8_VOLAOUT8, 0, 0xff, 1, dac_tlv),

	SOC_DOUBLE_R_S_TLV("ADC1 Capture Volume", CS42XX8_VOLAIN1,

			   CS42XX8_VOLAIN2, 0, -0x80, 0x30, 7, 0, adc_tlv),

	SOC_DOUBLE_R_S_TLV("ADC2 Capture Volume", CS42XX8_VOLAIN3,

			   CS42XX8_VOLAIN4, 0, -0x80, 0x30, 7, 0, adc_tlv),

	SOC_DOUBLE("DAC1 Invert Switch", CS42XX8_DACINV, 0, 1, 1, 0),

	SOC_DOUBLE("DAC2 Invert Switch", CS42XX8_DACINV, 2, 3, 1, 0),

	SOC_DOUBLE("DAC3 Invert Switch", CS42XX8_DACINV, 4, 5, 1, 0),

	SOC_DOUBLE("DAC4 Invert Switch", CS42XX8_DACINV, 6, 7, 1, 0),

	SOC_DOUBLE("ADC1 Invert Switch", CS42XX8_ADCINV, 0, 1, 1, 0),

	SOC_DOUBLE("ADC2 Invert Switch", CS42XX8_ADCINV, 2, 3, 1, 0),

	SOC_SINGLE("ADC High-Pass Filter Switch", CS42XX8_ADCCTL, 7, 1, 1),

	SOC_SINGLE("DAC De-emphasis Switch", CS42XX8_ADCCTL, 5, 1, 0),

	SOC_ENUM("ADC1 Single Ended Mode Switch", adc1_single_enum),

	SOC_ENUM("ADC2 Single Ended Mode Switch", adc2_single_enum),

	SOC_SINGLE("DAC Single Volume Control Switch", CS42XX8_TXCTL, 7, 1, 0),

	SOC_ENUM("DAC Soft Ramp & Zero Cross Control Switch", dac_szc_enum),

	SOC_SINGLE("DAC Auto Mute Switch", CS42XX8_TXCTL, 4, 1, 0),

	SOC_SINGLE("Mute ADC Serial Port Switch", CS42XX8_TXCTL, 3, 1, 0),

	SOC_SINGLE("ADC Single Volume Control Switch", CS42XX8_TXCTL, 2, 1, 0),

	SOC_ENUM("ADC Soft Ramp & Zero Cross Control Switch", adc_szc_enum),

};



static const struct snd_kcontrol_new cs42xx8_adc3_snd_controls[] = {

	SOC_DOUBLE_R_S_TLV("ADC3 Capture Volume", CS42XX8_VOLAIN5,

			   CS42XX8_VOLAIN6, 0, -0x80, 0x30, 7, 0, adc_tlv),

	SOC_DOUBLE("ADC3 Invert Switch", CS42XX8_ADCINV, 4, 5, 1, 0),

	SOC_ENUM("ADC3 Single Ended Mode Switch", adc3_single_enum),

};



static const struct snd_soc_dapm_widget cs42xx8_dapm_widgets[] = {

	SND_SOC_DAPM_DAC("DAC1", "Playback", CS42XX8_PWRCTL, 1, 1),

	SND_SOC_DAPM_DAC("DAC2", "Playback", CS42XX8_PWRCTL, 2, 1),

	SND_SOC_DAPM_DAC("DAC3", "Playback", CS42XX8_PWRCTL, 3, 1),

	SND_SOC_DAPM_DAC("DAC4", "Playback", CS42XX8_PWRCTL, 4, 1),



	SND_SOC_DAPM_OUTPUT("AOUT1L"),

	SND_SOC_DAPM_OUTPUT("AOUT1R"),

	SND_SOC_DAPM_OUTPUT("AOUT2L"),

	SND_SOC_DAPM_OUTPUT("AOUT2R"),

	SND_SOC_DAPM_OUTPUT("AOUT3L"),

	SND_SOC_DAPM_OUTPUT("AOUT3R"),

	SND_SOC_DAPM_OUTPUT("AOUT4L"),

	SND_SOC_DAPM_OUTPUT("AOUT4R"),



	SND_SOC_DAPM_ADC("ADC1", "Capture", CS42XX8_PWRCTL, 5, 1),

	SND_SOC_DAPM_ADC("ADC2", "Capture", CS42XX8_PWRCTL, 6, 1),



	SND_SOC_DAPM_INPUT("AIN1L"),

	SND_SOC_DAPM_INPUT("AIN1R"),

	SND_SOC_DAPM_INPUT("AIN2L"),

	SND_SOC_DAPM_INPUT("AIN2R"),



	SND_SOC_DAPM_SUPPLY("PWR", CS42XX8_PWRCTL, 0, 1, NULL, 0),

};



static const struct snd_soc_dapm_widget cs42xx8_adc3_dapm_widgets[] = {

	SND_SOC_DAPM_ADC("ADC3", "Capture", CS42XX8_PWRCTL, 7, 1),



	SND_SOC_DAPM_INPUT("AIN3L"),

	SND_SOC_DAPM_INPUT("AIN3R"),

};



static const struct snd_soc_dapm_route cs42xx8_dapm_routes[] = {

	/* Playback */

	{ "AOUT1L", NULL, "DAC1" },

	{ "AOUT1R", NULL, "DAC1" },

	{ "DAC1", NULL, "PWR" },



	{ "AOUT2L", NULL, "DAC2" },

	{ "AOUT2R", NULL, "DAC2" },

	{ "DAC2", NULL, "PWR" },



	{ "AOUT3L", NULL, "DAC3" },

	{ "AOUT3R", NULL, "DAC3" },

	{ "DAC3", NULL, "PWR" },



	{ "AOUT4L", NULL, "DAC4" },

	{ "AOUT4R", NULL, "DAC4" },

	{ "DAC4", NULL, "PWR" },



	/* Capture */

	{ "ADC1", NULL, "AIN1L" },

	{ "ADC1", NULL, "AIN1R" },

	{ "ADC1", NULL, "PWR" },



	{ "ADC2", NULL, "AIN2L" },

	{ "ADC2", NULL, "AIN2R" },

	{ "ADC2", NULL, "PWR" },

};



static const struct snd_soc_dapm_route cs42xx8_adc3_dapm_routes[] = {

	/* Capture */

	{ "ADC3", NULL, "AIN3L" },

	{ "ADC3", NULL, "AIN3R" },

	{ "ADC3", NULL, "PWR" },

};



struct cs42xx8_ratios {

	unsigned int ratio;

	unsigned char speed;

	unsigned char mclk;

};



static const struct cs42xx8_ratios cs42xx8_ratios[] = {

	{ 64, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_256(4) },

	{ 96, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_384(4) },

	{ 128, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_512(4) },

	{ 192, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_768(4) },

	{ 256, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_256(1) },

	{ 384, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_384(1) },

	{ 512, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_512(1) },

	{ 768, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_768(1) },

	{ 1024, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_1024(1) }

};



static int cs42xx8_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 cs42xx8_priv *cs42xx8 = snd_soc_codec_get_drvdata(codec);



	cs42xx8->sysclk = freq;



	return 0;

}



static int cs42xx8_set_dai_fmt(struct snd_soc_dai *codec_dai,

			       unsigned int format)

{

	struct snd_soc_codec *codec = codec_dai->codec;

	struct cs42xx8_priv *cs42xx8 = snd_soc_codec_get_drvdata(codec);

	u32 val;



	/* Set DAI format */

	switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {

	case SND_SOC_DAIFMT_LEFT_J:

		val = CS42XX8_INTF_DAC_DIF_LEFTJ | CS42XX8_INTF_ADC_DIF_LEFTJ;

		break;

	case SND_SOC_DAIFMT_I2S:

		val = CS42XX8_INTF_DAC_DIF_I2S | CS42XX8_INTF_ADC_DIF_I2S;

		break;

	case SND_SOC_DAIFMT_RIGHT_J:

		val = CS42XX8_INTF_DAC_DIF_RIGHTJ | CS42XX8_INTF_ADC_DIF_RIGHTJ;

		break;

	default:

		dev_err(codec->dev, "unsupported dai format\n");

		return -EINVAL;

	}



	regmap_update_bits(cs42xx8->regmap, CS42XX8_INTF,

			   CS42XX8_INTF_DAC_DIF_MASK |

			   CS42XX8_INTF_ADC_DIF_MASK, val);



	/* Set master/slave audio interface */

	switch (format & SND_SOC_DAIFMT_MASTER_MASK) {

	case SND_SOC_DAIFMT_CBS_CFS:

		cs42xx8->slave_mode = true;

		break;

	case SND_SOC_DAIFMT_CBM_CFM:

		cs42xx8->slave_mode = false;

		break;

	default:

		dev_err(codec->dev, "unsupported master/slave mode\n");

		return -EINVAL;

	}



	return 0;

}



static int cs42xx8_hw_params(struct snd_pcm_substream *substream,

			     struct snd_pcm_hw_params *params,

			     struct snd_soc_dai *dai)

{

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct snd_soc_codec *codec = rtd->codec;

	struct cs42xx8_priv *cs42xx8 = snd_soc_codec_get_drvdata(codec);

	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;

	u32 ratio = cs42xx8->sysclk / params_rate(params);

	u32 i, fm, val, mask;



	for (i = 0; i < ARRAY_SIZE(cs42xx8_ratios); i++) {

		if (cs42xx8_ratios[i].ratio == ratio)

			break;

	}



	if (i == ARRAY_SIZE(cs42xx8_ratios)) {

		dev_err(codec->dev, "unsupported sysclk ratio\n");

		return -EINVAL;

	}



	mask = CS42XX8_FUNCMOD_MFREQ_MASK;

	val = cs42xx8_ratios[i].mclk;



	fm = cs42xx8->slave_mode ? CS42XX8_FM_AUTO : cs42xx8_ratios[i].speed;



	regmap_update_bits(cs42xx8->regmap, CS42XX8_FUNCMOD,

			   CS42XX8_FUNCMOD_xC_FM_MASK(tx) | mask,

			   CS42XX8_FUNCMOD_xC_FM(tx, fm) | val);



	return 0;

}



static int cs42xx8_digital_mute(struct snd_soc_dai *dai, int mute)

{

	struct snd_soc_codec *codec = dai->codec;

	struct cs42xx8_priv *cs42xx8 = snd_soc_codec_get_drvdata(codec);



	regmap_update_bits(cs42xx8->regmap, CS42XX8_DACMUTE,

			   CS42XX8_DACMUTE_ALL, mute ? CS42XX8_DACMUTE_ALL : 0);



	return 0;

}



static const struct snd_soc_dai_ops cs42xx8_dai_ops = {

	.set_fmt	= cs42xx8_set_dai_fmt,

	.set_sysclk	= cs42xx8_set_dai_sysclk,

	.hw_params	= cs42xx8_hw_params,

	.digital_mute	= cs42xx8_digital_mute,

};



static struct snd_soc_dai_driver cs42xx8_dai = {

	.playback = {

		.stream_name = "Playback",

		.channels_min = 1,

		.channels_max = 8,

		.rates = SNDRV_PCM_RATE_8000_192000,

		.formats = CS42XX8_FORMATS,

	},

	.capture = {

		.stream_name = "Capture",

		.channels_min = 1,

		.rates = SNDRV_PCM_RATE_8000_192000,

		.formats = CS42XX8_FORMATS,

	},

	.ops = &cs42xx8_dai_ops,

};



static const struct reg_default cs42xx8_reg[] = {

	{ 0x01, 0x01 },   /* Chip I.D. and Revision Register */

	{ 0x02, 0x00 },   /* Power Control */

	{ 0x03, 0xF0 },   /* Functional Mode */

	{ 0x04, 0x46 },   /* Interface Formats */

	{ 0x05, 0x00 },   /* ADC Control & DAC De-Emphasis */

	{ 0x06, 0x10 },   /* Transition Control */

	{ 0x07, 0x00 },   /* DAC Channel Mute */

	{ 0x08, 0x00 },   /* Volume Control AOUT1 */

	{ 0x09, 0x00 },   /* Volume Control AOUT2 */

	{ 0x0a, 0x00 },   /* Volume Control AOUT3 */

	{ 0x0b, 0x00 },   /* Volume Control AOUT4 */

	{ 0x0c, 0x00 },   /* Volume Control AOUT5 */

	{ 0x0d, 0x00 },   /* Volume Control AOUT6 */

	{ 0x0e, 0x00 },   /* Volume Control AOUT7 */

	{ 0x0f, 0x00 },   /* Volume Control AOUT8 */

	{ 0x10, 0x00 },   /* DAC Channel Invert */

	{ 0x11, 0x00 },   /* Volume Control AIN1 */

	{ 0x12, 0x00 },   /* Volume Control AIN2 */

	{ 0x13, 0x00 },   /* Volume Control AIN3 */

	{ 0x14, 0x00 },   /* Volume Control AIN4 */

	{ 0x15, 0x00 },   /* Volume Control AIN5 */

	{ 0x16, 0x00 },   /* Volume Control AIN6 */

	{ 0x17, 0x00 },   /* ADC Channel Invert */

	{ 0x18, 0x00 },   /* Status Control */

	{ 0x1a, 0x00 },   /* Status Mask */

	{ 0x1b, 0x00 },   /* MUTEC Pin Control */

};



static bool cs42xx8_volatile_register(struct device *dev, unsigned int reg)

{

	switch (reg) {

	case CS42XX8_STATUS:

		return true;

	default:

		return false;

	}

}



static bool cs42xx8_writeable_register(struct device *dev, unsigned int reg)

{

	switch (reg) {

	case CS42XX8_CHIPID:

	case CS42XX8_STATUS:

		return false;

	default:

		return true;

	}

}



const struct regmap_config cs42xx8_regmap_config = {

	.reg_bits = 8,

	.val_bits = 8,



	.max_register = CS42XX8_LASTREG,

	.reg_defaults = cs42xx8_reg,

	.num_reg_defaults = ARRAY_SIZE(cs42xx8_reg),

	.volatile_reg = cs42xx8_volatile_register,

	.writeable_reg = cs42xx8_writeable_register,

	.cache_type = REGCACHE_RBTREE,

};

EXPORT_SYMBOL_GPL(cs42xx8_regmap_config);



static int cs42xx8_codec_probe(struct snd_soc_codec *codec)

{

	struct cs42xx8_priv *cs42xx8 = snd_soc_codec_get_drvdata(codec);

	struct snd_soc_dapm_context *dapm = &codec->dapm;



	switch (cs42xx8->drvdata->num_adcs) {

	case 3:

		snd_soc_add_codec_controls(codec, cs42xx8_adc3_snd_controls,

					ARRAY_SIZE(cs42xx8_adc3_snd_controls));

		snd_soc_dapm_new_controls(dapm, cs42xx8_adc3_dapm_widgets,

					ARRAY_SIZE(cs42xx8_adc3_dapm_widgets));

		snd_soc_dapm_add_routes(dapm, cs42xx8_adc3_dapm_routes,

					ARRAY_SIZE(cs42xx8_adc3_dapm_routes));

		break;

	default:

		break;

	}



	/* Mute all DAC channels */

	regmap_write(cs42xx8->regmap, CS42XX8_DACMUTE, CS42XX8_DACMUTE_ALL);



	return 0;

}



static const struct snd_soc_codec_driver cs42xx8_driver = {

	.probe = cs42xx8_codec_probe,

	.idle_bias_off = true,



	.controls = cs42xx8_snd_controls,

	.num_controls = ARRAY_SIZE(cs42xx8_snd_controls),

	.dapm_widgets = cs42xx8_dapm_widgets,

	.num_dapm_widgets = ARRAY_SIZE(cs42xx8_dapm_widgets),

	.dapm_routes = cs42xx8_dapm_routes,

	.num_dapm_routes = ARRAY_SIZE(cs42xx8_dapm_routes),

};



const struct cs42xx8_driver_data cs42448_data = {

	.name = "cs42448",

	.num_adcs = 3,

};

EXPORT_SYMBOL_GPL(cs42448_data);



const struct cs42xx8_driver_data cs42888_data = {

	.name = "cs42888",

	.num_adcs = 2,

};

EXPORT_SYMBOL_GPL(cs42888_data);



const struct of_device_id cs42xx8_of_match[] = {

	{ .compatible = "cirrus,cs42448", .data = &cs42448_data, },

	{ .compatible = "cirrus,cs42888", .data = &cs42888_data, },

	{ /* sentinel */ }

};

MODULE_DEVICE_TABLE(of, cs42xx8_of_match);

EXPORT_SYMBOL_GPL(cs42xx8_of_match);



int cs42xx8_probe(struct device *dev, struct regmap *regmap)

{

	const struct of_device_id *of_id = of_match_device(cs42xx8_of_match, dev);

	struct cs42xx8_priv *cs42xx8;

	int ret, val, i;



	cs42xx8 = devm_kzalloc(dev, sizeof(*cs42xx8), GFP_KERNEL);

	if (cs42xx8 == NULL)

		return -ENOMEM;



	dev_set_drvdata(dev, cs42xx8);



	if (of_id)

		cs42xx8->drvdata = of_id->data;



	if (!cs42xx8->drvdata) {

		dev_err(dev, "failed to find driver data\n");

		return -EINVAL;

	}



	cs42xx8->clk = devm_clk_get(dev, "mclk");

	if (IS_ERR(cs42xx8->clk)) {

		dev_err(dev, "failed to get the clock: %ld\n",

				PTR_ERR(cs42xx8->clk));

		return -EINVAL;

	}



	cs42xx8->sysclk = clk_get_rate(cs42xx8->clk);



	for (i = 0; i < ARRAY_SIZE(cs42xx8->supplies); i++)

		cs42xx8->supplies[i].supply = cs42xx8_supply_names[i];



	ret = devm_regulator_bulk_get(dev,

			ARRAY_SIZE(cs42xx8->supplies), cs42xx8->supplies);

	if (ret) {

		dev_err(dev, "failed to request supplies: %d\n", ret);

		return ret;

	}



	ret = regulator_bulk_enable(ARRAY_SIZE(cs42xx8->supplies),

				    cs42xx8->supplies);

	if (ret) {

		dev_err(dev, "failed to enable supplies: %d\n", ret);

		return ret;

	}



	/* Make sure hardware reset done */

	msleep(5);



	cs42xx8->regmap = regmap;

	if (IS_ERR(cs42xx8->regmap)) {

		ret = PTR_ERR(cs42xx8->regmap);

		dev_err(dev, "failed to allocate regmap: %d\n", ret);

		goto err_enable;

	}



	/*

	 * We haven't marked the chip revision as volatile due to

	 * sharing a register with the right input volume; explicitly

	 * bypass the cache to read it.

	 */

	regcache_cache_bypass(cs42xx8->regmap, true);



	/* Validate the chip ID */

	regmap_read(cs42xx8->regmap, CS42XX8_CHIPID, &val);

	if (val < 0) {

		dev_err(dev, "failed to get device ID: %x", val);

		ret = -EINVAL;

		goto err_enable;

	}



	/* The top four bits of the chip ID should be 0000 */

	if ((val & CS42XX8_CHIPID_CHIP_ID_MASK) != 0x00) {

		dev_err(dev, "unmatched chip ID: %d\n",

				val & CS42XX8_CHIPID_CHIP_ID_MASK);

		ret = -EINVAL;

		goto err_enable;

	}



	dev_info(dev, "found device, revision %X\n",

			val & CS42XX8_CHIPID_REV_ID_MASK);



	regcache_cache_bypass(cs42xx8->regmap, false);



	cs42xx8_dai.name = cs42xx8->drvdata->name;



	/* Each adc supports stereo input */

	cs42xx8_dai.capture.channels_max = cs42xx8->drvdata->num_adcs * 2;



	ret = snd_soc_register_codec(dev, &cs42xx8_driver, &cs42xx8_dai, 1);

	if (ret) {

		dev_err(dev, "failed to register codec:%d\n", ret);

		goto err_enable;

	}



	regcache_cache_only(cs42xx8->regmap, true);



err_enable:

	regulator_bulk_disable(ARRAY_SIZE(cs42xx8->supplies),

			       cs42xx8->supplies);



	return ret;

}

EXPORT_SYMBOL_GPL(cs42xx8_probe);



#ifdef CONFIG_PM_RUNTIME

static int cs42xx8_runtime_resume(struct device *dev)

{

	struct cs42xx8_priv *cs42xx8 = dev_get_drvdata(dev);

	int ret;



	ret = clk_prepare_enable(cs42xx8->clk);

	if (ret) {

		dev_err(dev, "failed to enable mclk: %d\n", ret);

		return ret;

	}



	ret = regulator_bulk_enable(ARRAY_SIZE(cs42xx8->supplies),

				    cs42xx8->supplies);

	if (ret) {

		dev_err(dev, "failed to enable supplies: %d\n", ret);

		goto err_clk;

	}



	/* Make sure hardware reset done */

	msleep(5);



	regcache_cache_only(cs42xx8->regmap, false);



	ret = regcache_sync(cs42xx8->regmap);

	if (ret) {

		dev_err(dev, "failed to sync regmap: %d\n", ret);

		goto err_bulk;

	}



	return 0;



err_bulk:

	regulator_bulk_disable(ARRAY_SIZE(cs42xx8->supplies),

			       cs42xx8->supplies);

err_clk:

	clk_disable_unprepare(cs42xx8->clk);



	return ret;

}



static int cs42xx8_runtime_suspend(struct device *dev)

{

	struct cs42xx8_priv *cs42xx8 = dev_get_drvdata(dev);



	regcache_cache_only(cs42xx8->regmap, true);



	regulator_bulk_disable(ARRAY_SIZE(cs42xx8->supplies),

			       cs42xx8->supplies);



	clk_disable_unprepare(cs42xx8->clk);



	return 0;

}

#endif



const struct dev_pm_ops cs42xx8_pm = {

	SET_RUNTIME_PM_OPS(cs42xx8_runtime_suspend, cs42xx8_runtime_resume, NULL)

};

EXPORT_SYMBOL_GPL(cs42xx8_pm);



MODULE_DESCRIPTION("Cirrus Logic CS42448/CS42888 ALSA SoC Codec Driver");

MODULE_AUTHOR("Freescale Semiconductor, Inc.");

MODULE_LICENSE("GPL");

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