[linux-block.git] / sound / soc / codecs / cs42l51.c

/*
 * cs42l51.c
 *
 * ASoC Driver for Cirrus Logic CS42L51 codecs
 *
 * Copyright (c) 2010 Arnaud Patard <apatard@mandriva.com>
 *
 * Based on cs4270.c - Copyright (c) Freescale Semiconductor
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * For now:
 *  - Only I2C is support. Not SPI
 *  - master mode *NOT* supported
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <sound/initval.h>
#include <sound/pcm_params.h>
#include <sound/pcm.h>
#include <linux/i2c.h>

#include "cs42l51.h"

enum master_slave_mode {
	MODE_SLAVE,
	MODE_SLAVE_AUTO,
	MODE_MASTER,
};

struct cs42l51_private {
	enum snd_soc_control_type control_type;
	unsigned int mclk;
	unsigned int audio_mode;	/* The mode (I2S or left-justified) */
	enum master_slave_mode func;
};

#define CS42L51_FORMATS ( \
		SNDRV_PCM_FMTBIT_S16_LE  | SNDRV_PCM_FMTBIT_S16_BE  | \
		SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
		SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
		SNDRV_PCM_FMTBIT_S24_LE  | SNDRV_PCM_FMTBIT_S24_BE)

static int cs42l51_fill_cache(struct snd_soc_codec *codec)
{
	u8 *cache = codec->reg_cache + 1;
	struct i2c_client *i2c_client = to_i2c_client(codec->dev);
	s32 length;

	length = i2c_smbus_read_i2c_block_data(i2c_client,
			CS42L51_FIRSTREG | 0x80, CS42L51_NUMREGS, cache);
	if (length != CS42L51_NUMREGS) {
		dev_err(&i2c_client->dev,
				"I2C read failure, addr=0x%x (ret=%d vs %d)\n",
				i2c_client->addr, length, CS42L51_NUMREGS);
		return -EIO;
	}

	return 0;
}

static int cs42l51_get_chan_mix(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	unsigned long value = snd_soc_read(codec, CS42L51_PCM_MIXER)&3;

	switch (value) {
	default:
	case 0:
		ucontrol->value.integer.value[0] = 0;
		break;
	/* same value : (L+R)/2 and (R+L)/2 */
	case 1:
	case 2:
		ucontrol->value.integer.value[0] = 1;
		break;
	case 3:
		ucontrol->value.integer.value[0] = 2;
		break;
	}

	return 0;
}

#define CHAN_MIX_NORMAL	0x00
#define CHAN_MIX_BOTH	0x55
#define CHAN_MIX_SWAP	0xFF

static int cs42l51_set_chan_mix(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	unsigned char val;

	switch (ucontrol->value.integer.value[0]) {
	default:
	case 0:
		val = CHAN_MIX_NORMAL;
		break;
	case 1:
		val = CHAN_MIX_BOTH;
		break;
	case 2:
		val = CHAN_MIX_SWAP;
		break;
	}

	snd_soc_write(codec, CS42L51_PCM_MIXER, val);

	return 1;
}

static const DECLARE_TLV_DB_SCALE(adc_pcm_tlv, -5150, 50, 0);
static const DECLARE_TLV_DB_SCALE(tone_tlv, -1050, 150, 0);
/* This is a lie. after -102 db, it stays at -102 */
/* maybe a range would be better */
static const DECLARE_TLV_DB_SCALE(aout_tlv, -11550, 50, 0);

static const DECLARE_TLV_DB_SCALE(boost_tlv, 1600, 1600, 0);
static const char *chan_mix[] = {
	"L R",
	"L+R",
	"R L",
};

static const struct soc_enum cs42l51_chan_mix =
	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(chan_mix), chan_mix);

static const struct snd_kcontrol_new cs42l51_snd_controls[] = {
	SOC_DOUBLE_R_SX_TLV("PCM Playback Volume",
			CS42L51_PCMA_VOL, CS42L51_PCMB_VOL,
			7, 0xffffff99, 0x18, adc_pcm_tlv),
	SOC_DOUBLE_R("PCM Playback Switch",
			CS42L51_PCMA_VOL, CS42L51_PCMB_VOL, 7, 1, 1),
	SOC_DOUBLE_R_SX_TLV("Analog Playback Volume",
			CS42L51_AOUTA_VOL, CS42L51_AOUTB_VOL,
			8, 0xffffff19, 0x18, aout_tlv),
	SOC_DOUBLE_R_SX_TLV("ADC Mixer Volume",
			CS42L51_ADCA_VOL, CS42L51_ADCB_VOL,
			7, 0xffffff99, 0x18, adc_pcm_tlv),
	SOC_DOUBLE_R("ADC Mixer Switch",
			CS42L51_ADCA_VOL, CS42L51_ADCB_VOL, 7, 1, 1),
	SOC_SINGLE("Playback Deemphasis Switch", CS42L51_DAC_CTL, 3, 1, 0),
	SOC_SINGLE("Auto-Mute Switch", CS42L51_DAC_CTL, 2, 1, 0),
	SOC_SINGLE("Soft Ramp Switch", CS42L51_DAC_CTL, 1, 1, 0),
	SOC_SINGLE("Zero Cross Switch", CS42L51_DAC_CTL, 0, 0, 0),
	SOC_DOUBLE_TLV("Mic Boost Volume",
			CS42L51_MIC_CTL, 0, 1, 1, 0, boost_tlv),
	SOC_SINGLE_TLV("Bass Volume", CS42L51_TONE_CTL, 0, 0xf, 1, tone_tlv),
	SOC_SINGLE_TLV("Treble Volume", CS42L51_TONE_CTL, 4, 0xf, 1, tone_tlv),
	SOC_ENUM_EXT("PCM channel mixer",
			cs42l51_chan_mix,
			cs42l51_get_chan_mix, cs42l51_set_chan_mix),
};

/*
 * to power down, one must:
 * 1.) Enable the PDN bit
 * 2.) enable power-down for the select channels
 * 3.) disable the PDN bit.
 */
static int cs42l51_pdn_event(struct snd_soc_dapm_widget *w,
		struct snd_kcontrol *kcontrol, int event)
{
	unsigned long value;

	value = snd_soc_read(w->codec, CS42L51_POWER_CTL1);
	value &= ~CS42L51_POWER_CTL1_PDN;

	switch (event) {
	case SND_SOC_DAPM_PRE_PMD:
		value |= CS42L51_POWER_CTL1_PDN;
		break;
	default:
	case SND_SOC_DAPM_POST_PMD:
		break;
	}
	snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1,
		CS42L51_POWER_CTL1_PDN, value);

	return 0;
}

static const char *cs42l51_dac_names[] = {"Direct PCM",
	"DSP PCM", "ADC"};
static const struct soc_enum cs42l51_dac_mux_enum =
	SOC_ENUM_SINGLE(CS42L51_DAC_CTL, 6, 3, cs42l51_dac_names);
static const struct snd_kcontrol_new cs42l51_dac_mux_controls =
	SOC_DAPM_ENUM("Route", cs42l51_dac_mux_enum);

static const char *cs42l51_adcl_names[] = {"AIN1 Left", "AIN2 Left",
	"MIC Left", "MIC+preamp Left"};
static const struct soc_enum cs42l51_adcl_mux_enum =
	SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 4, 4, cs42l51_adcl_names);
static const struct snd_kcontrol_new cs42l51_adcl_mux_controls =
	SOC_DAPM_ENUM("Route", cs42l51_adcl_mux_enum);

static const char *cs42l51_adcr_names[] = {"AIN1 Right", "AIN2 Right",
	"MIC Right", "MIC+preamp Right"};
static const struct soc_enum cs42l51_adcr_mux_enum =
	SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 6, 4, cs42l51_adcr_names);
static const struct snd_kcontrol_new cs42l51_adcr_mux_controls =
	SOC_DAPM_ENUM("Route", cs42l51_adcr_mux_enum);

static const struct snd_soc_dapm_widget cs42l51_dapm_widgets[] = {
	SND_SOC_DAPM_MICBIAS("Mic Bias", CS42L51_MIC_POWER_CTL, 1, 1),
	SND_SOC_DAPM_PGA_E("Left PGA", CS42L51_POWER_CTL1, 3, 1, NULL, 0,
		cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
	SND_SOC_DAPM_PGA_E("Right PGA", CS42L51_POWER_CTL1, 4, 1, NULL, 0,
		cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
	SND_SOC_DAPM_ADC_E("Left ADC", "Left HiFi Capture",
		CS42L51_POWER_CTL1, 1, 1,
		cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
	SND_SOC_DAPM_ADC_E("Right ADC", "Right HiFi Capture",
		CS42L51_POWER_CTL1, 2, 1,
		cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
	SND_SOC_DAPM_DAC_E("Left DAC", "Left HiFi Playback",
		CS42L51_POWER_CTL1, 5, 1,
		cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
	SND_SOC_DAPM_DAC_E("Right DAC", "Right HiFi Playback",
		CS42L51_POWER_CTL1, 6, 1,
		cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),

	/* analog/mic */
	SND_SOC_DAPM_INPUT("AIN1L"),
	SND_SOC_DAPM_INPUT("AIN1R"),
	SND_SOC_DAPM_INPUT("AIN2L"),
	SND_SOC_DAPM_INPUT("AIN2R"),
	SND_SOC_DAPM_INPUT("MICL"),
	SND_SOC_DAPM_INPUT("MICR"),

	SND_SOC_DAPM_MIXER("Mic Preamp Left",
		CS42L51_MIC_POWER_CTL, 2, 1, NULL, 0),
	SND_SOC_DAPM_MIXER("Mic Preamp Right",
		CS42L51_MIC_POWER_CTL, 3, 1, NULL, 0),

	/* HP */
	SND_SOC_DAPM_OUTPUT("HPL"),
	SND_SOC_DAPM_OUTPUT("HPR"),

	/* mux */
	SND_SOC_DAPM_MUX("DAC Mux", SND_SOC_NOPM, 0, 0,
		&cs42l51_dac_mux_controls),
	SND_SOC_DAPM_MUX("PGA-ADC Mux Left", SND_SOC_NOPM, 0, 0,
		&cs42l51_adcl_mux_controls),
	SND_SOC_DAPM_MUX("PGA-ADC Mux Right", SND_SOC_NOPM, 0, 0,
		&cs42l51_adcr_mux_controls),
};

static const struct snd_soc_dapm_route cs42l51_routes[] = {
	{"HPL", NULL, "Left DAC"},
	{"HPR", NULL, "Right DAC"},

	{"Left ADC", NULL, "Left PGA"},
	{"Right ADC", NULL, "Right PGA"},

	{"Mic Preamp Left",  NULL,  "MICL"},
	{"Mic Preamp Right", NULL,  "MICR"},

	{"PGA-ADC Mux Left",  "AIN1 Left",        "AIN1L" },
	{"PGA-ADC Mux Left",  "AIN2 Left",        "AIN2L" },
	{"PGA-ADC Mux Left",  "MIC Left",         "MICL"  },
	{"PGA-ADC Mux Left",  "MIC+preamp Left",  "Mic Preamp Left" },
	{"PGA-ADC Mux Right", "AIN1 Right",       "AIN1R" },
	{"PGA-ADC Mux Right", "AIN2 Right",       "AIN2R" },
	{"PGA-ADC Mux Right", "MIC Right",        "MICR" },
	{"PGA-ADC Mux Right", "MIC+preamp Right", "Mic Preamp Right" },

	{"Left PGA", NULL, "PGA-ADC Mux Left"},
	{"Right PGA", NULL, "PGA-ADC Mux Right"},
};

static int cs42l51_set_dai_fmt(struct snd_soc_dai *codec_dai,
		unsigned int format)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
	int ret = 0;

	switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
	case SND_SOC_DAIFMT_LEFT_J:
	case SND_SOC_DAIFMT_RIGHT_J:
		cs42l51->audio_mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
		break;
	default:
		dev_err(codec->dev, "invalid DAI format\n");
		ret = -EINVAL;
	}

	switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		cs42l51->func = MODE_MASTER;
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
		cs42l51->func = MODE_SLAVE_AUTO;
		break;
	default:
		ret = -EINVAL;
		break;
	}

	return ret;
}

struct cs42l51_ratios {
	unsigned int ratio;
	unsigned char speed_mode;
	unsigned char mclk;
};

static struct cs42l51_ratios slave_ratios[] = {
	{  512, CS42L51_QSM_MODE, 0 }, {  768, CS42L51_QSM_MODE, 0 },
	{ 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
	{ 2048, CS42L51_QSM_MODE, 0 }, { 3072, CS42L51_QSM_MODE, 0 },
	{  256, CS42L51_HSM_MODE, 0 }, {  384, CS42L51_HSM_MODE, 0 },
	{  512, CS42L51_HSM_MODE, 0 }, {  768, CS42L51_HSM_MODE, 0 },
	{ 1024, CS42L51_HSM_MODE, 0 }, { 1536, CS42L51_HSM_MODE, 0 },
	{  128, CS42L51_SSM_MODE, 0 }, {  192, CS42L51_SSM_MODE, 0 },
	{  256, CS42L51_SSM_MODE, 0 }, {  384, CS42L51_SSM_MODE, 0 },
	{  512, CS42L51_SSM_MODE, 0 }, {  768, CS42L51_SSM_MODE, 0 },
	{  128, CS42L51_DSM_MODE, 0 }, {  192, CS42L51_DSM_MODE, 0 },
	{  256, CS42L51_DSM_MODE, 0 }, {  384, CS42L51_DSM_MODE, 0 },
};

static struct cs42l51_ratios slave_auto_ratios[] = {
	{ 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
	{ 2048, CS42L51_QSM_MODE, 1 }, { 3072, CS42L51_QSM_MODE, 1 },
	{  512, CS42L51_HSM_MODE, 0 }, {  768, CS42L51_HSM_MODE, 0 },
	{ 1024, CS42L51_HSM_MODE, 1 }, { 1536, CS42L51_HSM_MODE, 1 },
	{  256, CS42L51_SSM_MODE, 0 }, {  384, CS42L51_SSM_MODE, 0 },
	{  512, CS42L51_SSM_MODE, 1 }, {  768, CS42L51_SSM_MODE, 1 },
	{  128, CS42L51_DSM_MODE, 0 }, {  192, CS42L51_DSM_MODE, 0 },
	{  256, CS42L51_DSM_MODE, 1 }, {  384, CS42L51_DSM_MODE, 1 },
};

static int cs42l51_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 cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);

	cs42l51->mclk = freq;
	return 0;
}

static int cs42l51_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 cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
	int ret;
	unsigned int i;
	unsigned int rate;
	unsigned int ratio;
	struct cs42l51_ratios *ratios = NULL;
	int nr_ratios = 0;
	int intf_ctl, power_ctl, fmt;

	switch (cs42l51->func) {
	case MODE_MASTER:
		return -EINVAL;
	case MODE_SLAVE:
		ratios = slave_ratios;
		nr_ratios = ARRAY_SIZE(slave_ratios);
		break;
	case MODE_SLAVE_AUTO:
		ratios = slave_auto_ratios;
		nr_ratios = ARRAY_SIZE(slave_auto_ratios);
		break;
	}

	/* Figure out which MCLK/LRCK ratio to use */
	rate = params_rate(params);     /* Sampling rate, in Hz */
	ratio = cs42l51->mclk / rate;    /* MCLK/LRCK ratio */
	for (i = 0; i < nr_ratios; i++) {
		if (ratios[i].ratio == ratio)
			break;
	}

	if (i == nr_ratios) {
		/* We did not find a matching ratio */
		dev_err(codec->dev, "could not find matching ratio\n");
		return -EINVAL;
	}

	intf_ctl = snd_soc_read(codec, CS42L51_INTF_CTL);
	power_ctl = snd_soc_read(codec, CS42L51_MIC_POWER_CTL);

	intf_ctl &= ~(CS42L51_INTF_CTL_MASTER | CS42L51_INTF_CTL_ADC_I2S
			| CS42L51_INTF_CTL_DAC_FORMAT(7));
	power_ctl &= ~(CS42L51_MIC_POWER_CTL_SPEED(3)
			| CS42L51_MIC_POWER_CTL_MCLK_DIV2);

	switch (cs42l51->func) {
	case MODE_MASTER:
		intf_ctl |= CS42L51_INTF_CTL_MASTER;
		power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
		break;
	case MODE_SLAVE:
		power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
		break;
	case MODE_SLAVE_AUTO:
		power_ctl |= CS42L51_MIC_POWER_CTL_AUTO;
		break;
	}

	switch (cs42l51->audio_mode) {
	case SND_SOC_DAIFMT_I2S:
		intf_ctl |= CS42L51_INTF_CTL_ADC_I2S;
		intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_I2S);
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_LJ24);
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		switch (params_format(params)) {
		case SNDRV_PCM_FORMAT_S16_LE:
		case SNDRV_PCM_FORMAT_S16_BE:
			fmt = CS42L51_DAC_DIF_RJ16;
			break;
		case SNDRV_PCM_FORMAT_S18_3LE:
		case SNDRV_PCM_FORMAT_S18_3BE:
			fmt = CS42L51_DAC_DIF_RJ18;
			break;
		case SNDRV_PCM_FORMAT_S20_3LE:
		case SNDRV_PCM_FORMAT_S20_3BE:
			fmt = CS42L51_DAC_DIF_RJ20;
			break;
		case SNDRV_PCM_FORMAT_S24_LE:
		case SNDRV_PCM_FORMAT_S24_BE:
			fmt = CS42L51_DAC_DIF_RJ24;
			break;
		default:
			dev_err(codec->dev, "unknown format\n");
			return -EINVAL;
		}
		intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(fmt);
		break;
	default:
		dev_err(codec->dev, "unknown format\n");
		return -EINVAL;
	}

	if (ratios[i].mclk)
		power_ctl |= CS42L51_MIC_POWER_CTL_MCLK_DIV2;

	ret = snd_soc_write(codec, CS42L51_INTF_CTL, intf_ctl);
	if (ret < 0)
		return ret;

	ret = snd_soc_write(codec, CS42L51_MIC_POWER_CTL, power_ctl);
	if (ret < 0)
		return ret;

	return 0;
}

static int cs42l51_dai_mute(struct snd_soc_dai *dai, int mute)
{
	struct snd_soc_codec *codec = dai->codec;
	int reg;
	int mask = CS42L51_DAC_OUT_CTL_DACA_MUTE|CS42L51_DAC_OUT_CTL_DACB_MUTE;

	reg = snd_soc_read(codec, CS42L51_DAC_OUT_CTL);

	if (mute)
		reg |= mask;
	else
		reg &= ~mask;

	return snd_soc_write(codec, CS42L51_DAC_OUT_CTL, reg);
}

static struct snd_soc_dai_ops cs42l51_dai_ops = {
	.hw_params      = cs42l51_hw_params,
	.set_sysclk     = cs42l51_set_dai_sysclk,
	.set_fmt        = cs42l51_set_dai_fmt,
	.digital_mute   = cs42l51_dai_mute,
};

static struct snd_soc_dai_driver cs42l51_dai = {
	.name = "cs42l51-hifi",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_96000,
		.formats = CS42L51_FORMATS,
	},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_96000,
		.formats = CS42L51_FORMATS,
	},
	.ops = &cs42l51_dai_ops,
};

static int cs42l51_probe(struct snd_soc_codec *codec)
{
	struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
	struct snd_soc_dapm_context *dapm = &codec->dapm;
	int ret, reg;

	ret = cs42l51_fill_cache(codec);
	if (ret < 0) {
		dev_err(codec->dev, "failed to fill register cache\n");
		return ret;
	}

	ret = snd_soc_codec_set_cache_io(codec, 8, 8, cs42l51->control_type);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
		return ret;
	}

	/*
	 * DAC configuration
	 * - Use signal processor
	 * - auto mute
	 * - vol changes immediate
	 * - no de-emphasize
	 */
	reg = CS42L51_DAC_CTL_DATA_SEL(1)
		| CS42L51_DAC_CTL_AMUTE | CS42L51_DAC_CTL_DACSZ(0);
	ret = snd_soc_write(codec, CS42L51_DAC_CTL, reg);
	if (ret < 0)
		return ret;

	snd_soc_add_controls(codec, cs42l51_snd_controls,
		ARRAY_SIZE(cs42l51_snd_controls));
	snd_soc_dapm_new_controls(dapm, cs42l51_dapm_widgets,
		ARRAY_SIZE(cs42l51_dapm_widgets));
	snd_soc_dapm_add_routes(dapm, cs42l51_routes,
		ARRAY_SIZE(cs42l51_routes));

	return 0;
}

static struct snd_soc_codec_driver soc_codec_device_cs42l51 = {
	.probe =	cs42l51_probe,
	.reg_cache_size = CS42L51_NUMREGS,
	.reg_word_size = sizeof(u8),
};

static int cs42l51_i2c_probe(struct i2c_client *i2c_client,
	const struct i2c_device_id *id)
{
	struct cs42l51_private *cs42l51;
	int ret;

	/* Verify that we have a CS42L51 */
	ret = i2c_smbus_read_byte_data(i2c_client, CS42L51_CHIP_REV_ID);
	if (ret < 0) {
		dev_err(&i2c_client->dev, "failed to read I2C\n");
		goto error;
	}

	if ((ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_A)) &&
	    (ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_B))) {
		dev_err(&i2c_client->dev, "Invalid chip id\n");
		ret = -ENODEV;
		goto error;
	}

	dev_info(&i2c_client->dev, "found device cs42l51 rev %d\n",
				ret & 7);

	cs42l51 = kzalloc(sizeof(struct cs42l51_private), GFP_KERNEL);
	if (!cs42l51) {
		dev_err(&i2c_client->dev, "could not allocate codec\n");
		return -ENOMEM;
	}

	i2c_set_clientdata(i2c_client, cs42l51);
	cs42l51->control_type = SND_SOC_I2C;

	ret =  snd_soc_register_codec(&i2c_client->dev,
			&soc_codec_device_cs42l51, &cs42l51_dai, 1);
	if (ret < 0)
		kfree(cs42l51);
error:
	return ret;
}

static int cs42l51_i2c_remove(struct i2c_client *client)
{
	struct cs42l51_private *cs42l51 = i2c_get_clientdata(client);

	snd_soc_unregister_codec(&client->dev);
	kfree(cs42l51);
	return 0;
}

static const struct i2c_device_id cs42l51_id[] = {
	{"cs42l51", 0},
	{}
};
MODULE_DEVICE_TABLE(i2c, cs42l51_id);

static struct i2c_driver cs42l51_i2c_driver = {
	.driver = {
		.name = "cs42l51-codec",
		.owner = THIS_MODULE,
	},
	.id_table = cs42l51_id,
	.probe = cs42l51_i2c_probe,
	.remove = cs42l51_i2c_remove,
};

static int __init cs42l51_init(void)
{
	int ret;

	ret = i2c_add_driver(&cs42l51_i2c_driver);
	if (ret != 0) {
		printk(KERN_ERR "%s: can't add i2c driver\n", __func__);
		return ret;
	}
	return 0;
}
module_init(cs42l51_init);

static void __exit cs42l51_exit(void)
{
	i2c_del_driver(&cs42l51_i2c_driver);
}
module_exit(cs42l51_exit);

MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
MODULE_DESCRIPTION("Cirrus Logic CS42L51 ALSA SoC Codec Driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
72ed5a8c	1	/*
	2	* cs42l51.c
	3	*
	4	* ASoC Driver for Cirrus Logic CS42L51 codecs
	5	*
	6	* Copyright (c) 2010 Arnaud Patard <apatard@mandriva.com>
	7	*
	8	* Based on cs4270.c - Copyright (c) Freescale Semiconductor
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* For now:
	20	* - Only I2C is support. Not SPI
	21	* - master mode NOT supported
	22	*/
	23
	24	#include <linux/module.h>
	25	#include <linux/platform_device.h>
	26	#include <linux/slab.h>
	27	#include <sound/core.h>
	28	#include <sound/soc.h>
72ed5a8c	29	#include <sound/tlv.h>
	30	#include <sound/initval.h>
	31	#include <sound/pcm_params.h>
	32	#include <sound/pcm.h>
	33	#include <linux/i2c.h>
	34
	35	#include "cs42l51.h"
	36
	37	enum master_slave_mode {
	38	MODE_SLAVE,
	39	MODE_SLAVE_AUTO,
	40	MODE_MASTER,
	41	};
	42
	43	struct cs42l51_private {
f0fba2ad	44	enum snd_soc_control_type control_type;
72ed5a8c	45	unsigned int mclk;
	46	unsigned int audio_mode; /* The mode (I2S or left-justified) */
	47	enum master_slave_mode func;
72ed5a8c	48	};
72ed5a8c	49
72ed5a8c	50	#define CS42L51_FORMATS ( \
	51	SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S16_BE \| \
	52	SNDRV_PCM_FMTBIT_S18_3LE \| SNDRV_PCM_FMTBIT_S18_3BE \| \
	53	SNDRV_PCM_FMTBIT_S20_3LE \| SNDRV_PCM_FMTBIT_S20_3BE \| \
	54	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S24_BE)
	55
	56	static int cs42l51_fill_cache(struct snd_soc_codec *codec)
	57	{
	58	u8 *cache = codec->reg_cache + 1;
6d4f7097	59	struct i2c_client *i2c_client = to_i2c_client(codec->dev);
72ed5a8c	60	s32 length;
	61
	62	length = i2c_smbus_read_i2c_block_data(i2c_client,
	63	CS42L51_FIRSTREG \| 0x80, CS42L51_NUMREGS, cache);
	64	if (length != CS42L51_NUMREGS) {
	65	dev_err(&i2c_client->dev,
	66	"I2C read failure, addr=0x%x (ret=%d vs %d)\n",
	67	i2c_client->addr, length, CS42L51_NUMREGS);
	68	return -EIO;
	69	}
	70
	71	return 0;
	72	}
	73
72ed5a8c	74	static int cs42l51_get_chan_mix(struct snd_kcontrol *kcontrol,
	75	struct snd_ctl_elem_value *ucontrol)
	76	{
	77	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	78	unsigned long value = snd_soc_read(codec, CS42L51_PCM_MIXER)&3;
	79
	80	switch (value) {
	81	default:
	82	case 0:
	83	ucontrol->value.integer.value[0] = 0;
	84	break;
	85	/* same value : (L+R)/2 and (R+L)/2 */
	86	case 1:
	87	case 2:
	88	ucontrol->value.integer.value[0] = 1;
	89	break;
	90	case 3:
	91	ucontrol->value.integer.value[0] = 2;
	92	break;
	93	}
	94
	95	return 0;
	96	}
	97
	98	#define CHAN_MIX_NORMAL 0x00
	99	#define CHAN_MIX_BOTH 0x55
	100	#define CHAN_MIX_SWAP 0xFF
	101
	102	static int cs42l51_set_chan_mix(struct snd_kcontrol *kcontrol,
	103	struct snd_ctl_elem_value *ucontrol)
	104	{
	105	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	106	unsigned char val;
	107
	108	switch (ucontrol->value.integer.value[0]) {
	109	default:
	110	case 0:
	111	val = CHAN_MIX_NORMAL;
	112	break;
	113	case 1:
	114	val = CHAN_MIX_BOTH;
	115	break;
	116	case 2:
	117	val = CHAN_MIX_SWAP;
	118	break;
	119	}
	120
	121	snd_soc_write(codec, CS42L51_PCM_MIXER, val);
	122
	123	return 1;
	124	}
	125
	126	static const DECLARE_TLV_DB_SCALE(adc_pcm_tlv, -5150, 50, 0);
	127	static const DECLARE_TLV_DB_SCALE(tone_tlv, -1050, 150, 0);
	128	/* This is a lie. after -102 db, it stays at -102 */
	129	/* maybe a range would be better */
	130	static const DECLARE_TLV_DB_SCALE(aout_tlv, -11550, 50, 0);
	131
	132	static const DECLARE_TLV_DB_SCALE(boost_tlv, 1600, 1600, 0);
	133	static const char *chan_mix[] = {
	134	"L R",
	135	"L+R",
	136	"R L",
	137	};
138
139	static const struct soc_enum cs42l51_chan_mix =
140	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(chan_mix), chan_mix);
141
142	static const struct snd_kcontrol_new cs42l51_snd_controls[] = {
143	SOC_DOUBLE_R_SX_TLV("PCM Playback Volume",
144	CS42L51_PCMA_VOL, CS42L51_PCMB_VOL,
145	7, 0xffffff99, 0x18, adc_pcm_tlv),
146	SOC_DOUBLE_R("PCM Playback Switch",
147	CS42L51_PCMA_VOL, CS42L51_PCMB_VOL, 7, 1, 1),
148	SOC_DOUBLE_R_SX_TLV("Analog Playback Volume",
149	CS42L51_AOUTA_VOL, CS42L51_AOUTB_VOL,
150	8, 0xffffff19, 0x18, aout_tlv),
151	SOC_DOUBLE_R_SX_TLV("ADC Mixer Volume",
152	CS42L51_ADCA_VOL, CS42L51_ADCB_VOL,
153	7, 0xffffff99, 0x18, adc_pcm_tlv),
154	SOC_DOUBLE_R("ADC Mixer Switch",
155	CS42L51_ADCA_VOL, CS42L51_ADCB_VOL, 7, 1, 1),
156	SOC_SINGLE("Playback Deemphasis Switch", CS42L51_DAC_CTL, 3, 1, 0),
157	SOC_SINGLE("Auto-Mute Switch", CS42L51_DAC_CTL, 2, 1, 0),
158	SOC_SINGLE("Soft Ramp Switch", CS42L51_DAC_CTL, 1, 1, 0),
159	SOC_SINGLE("Zero Cross Switch", CS42L51_DAC_CTL, 0, 0, 0),
160	SOC_DOUBLE_TLV("Mic Boost Volume",
161	CS42L51_MIC_CTL, 0, 1, 1, 0, boost_tlv),
162	SOC_SINGLE_TLV("Bass Volume", CS42L51_TONE_CTL, 0, 0xf, 1, tone_tlv),
163	SOC_SINGLE_TLV("Treble Volume", CS42L51_TONE_CTL, 4, 0xf, 1, tone_tlv),
164	SOC_ENUM_EXT("PCM channel mixer",
165	cs42l51_chan_mix,
166	cs42l51_get_chan_mix, cs42l51_set_chan_mix),
167	};
168
169	/*
170	* to power down, one must:
171	* 1.) Enable the PDN bit
172	* 2.) enable power-down for the select channels
173	* 3.) disable the PDN bit.
174	*/
175	static int cs42l51_pdn_event(struct snd_soc_dapm_widget *w,
176	struct snd_kcontrol *kcontrol, int event)
177	{
178	unsigned long value;
179
180	value = snd_soc_read(w->codec, CS42L51_POWER_CTL1);
181	value &= ~CS42L51_POWER_CTL1_PDN;
182
183	switch (event) {
184	case SND_SOC_DAPM_PRE_PMD:
185	value \|= CS42L51_POWER_CTL1_PDN;
186	break;
187	default:
188	case SND_SOC_DAPM_POST_PMD:
189	break;
190	}
191	snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1,
192	CS42L51_POWER_CTL1_PDN, value);
193
194	return 0;
195	}
196
197	static const char *cs42l51_dac_names[] = {"Direct PCM",
198	"DSP PCM", "ADC"};
199	static const struct soc_enum cs42l51_dac_mux_enum =
200	SOC_ENUM_SINGLE(CS42L51_DAC_CTL, 6, 3, cs42l51_dac_names);
201	static const struct snd_kcontrol_new cs42l51_dac_mux_controls =
202	SOC_DAPM_ENUM("Route", cs42l51_dac_mux_enum);
203
204	static const char *cs42l51_adcl_names[] = {"AIN1 Left", "AIN2 Left",
205	"MIC Left", "MIC+preamp Left"};
206	static const struct soc_enum cs42l51_adcl_mux_enum =
207	SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 4, 4, cs42l51_adcl_names);
208	static const struct snd_kcontrol_new cs42l51_adcl_mux_controls =
209	SOC_DAPM_ENUM("Route", cs42l51_adcl_mux_enum);
210
211	static const char *cs42l51_adcr_names[] = {"AIN1 Right", "AIN2 Right",
212	"MIC Right", "MIC+preamp Right"};
213	static const struct soc_enum cs42l51_adcr_mux_enum =
214	SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 6, 4, cs42l51_adcr_names);
215	static const struct snd_kcontrol_new cs42l51_adcr_mux_controls =
216	SOC_DAPM_ENUM("Route", cs42l51_adcr_mux_enum);
217
218	static const struct snd_soc_dapm_widget cs42l51_dapm_widgets[] = {
219	SND_SOC_DAPM_MICBIAS("Mic Bias", CS42L51_MIC_POWER_CTL, 1, 1),
220	SND_SOC_DAPM_PGA_E("Left PGA", CS42L51_POWER_CTL1, 3, 1, NULL, 0,
221	cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
222	SND_SOC_DAPM_PGA_E("Right PGA", CS42L51_POWER_CTL1, 4, 1, NULL, 0,
223	cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
224	SND_SOC_DAPM_ADC_E("Left ADC", "Left HiFi Capture",
225	CS42L51_POWER_CTL1, 1, 1,
226	cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
227	SND_SOC_DAPM_ADC_E("Right ADC", "Right HiFi Capture",
228	CS42L51_POWER_CTL1, 2, 1,
229	cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
230	SND_SOC_DAPM_DAC_E("Left DAC", "Left HiFi Playback",
231	CS42L51_POWER_CTL1, 5, 1,
232	cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
233	SND_SOC_DAPM_DAC_E("Right DAC", "Right HiFi Playback",
234	CS42L51_POWER_CTL1, 6, 1,
235	cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
236
237	/* analog/mic */
238	SND_SOC_DAPM_INPUT("AIN1L"),
239	SND_SOC_DAPM_INPUT("AIN1R"),
240	SND_SOC_DAPM_INPUT("AIN2L"),
241	SND_SOC_DAPM_INPUT("AIN2R"),
242	SND_SOC_DAPM_INPUT("MICL"),
243	SND_SOC_DAPM_INPUT("MICR"),
244
245	SND_SOC_DAPM_MIXER("Mic Preamp Left",
246	CS42L51_MIC_POWER_CTL, 2, 1, NULL, 0),
247	SND_SOC_DAPM_MIXER("Mic Preamp Right",
248	CS42L51_MIC_POWER_CTL, 3, 1, NULL, 0),
249
250	/* HP */
251	SND_SOC_DAPM_OUTPUT("HPL"),
252	SND_SOC_DAPM_OUTPUT("HPR"),
253
254	/* mux */
255	SND_SOC_DAPM_MUX("DAC Mux", SND_SOC_NOPM, 0, 0,
256	&cs42l51_dac_mux_controls),
257	SND_SOC_DAPM_MUX("PGA-ADC Mux Left", SND_SOC_NOPM, 0, 0,
258	&cs42l51_adcl_mux_controls),
259	SND_SOC_DAPM_MUX("PGA-ADC Mux Right", SND_SOC_NOPM, 0, 0,
260	&cs42l51_adcr_mux_controls),
261	};
262
263	static const struct snd_soc_dapm_route cs42l51_routes[] = {
264	{"HPL", NULL, "Left DAC"},
265	{"HPR", NULL, "Right DAC"},
266
267	{"Left ADC", NULL, "Left PGA"},
268	{"Right ADC", NULL, "Right PGA"},
269
270	{"Mic Preamp Left", NULL, "MICL"},
271	{"Mic Preamp Right", NULL, "MICR"},
272
273	{"PGA-ADC Mux Left", "AIN1 Left", "AIN1L" },
274	{"PGA-ADC Mux Left", "AIN2 Left", "AIN2L" },
275	{"PGA-ADC Mux Left", "MIC Left", "MICL" },
276	{"PGA-ADC Mux Left", "MIC+preamp Left", "Mic Preamp Left" },
277	{"PGA-ADC Mux Right", "AIN1 Right", "AIN1R" },
278	{"PGA-ADC Mux Right", "AIN2 Right", "AIN2R" },
279	{"PGA-ADC Mux Right", "MIC Right", "MICR" },
280	{"PGA-ADC Mux Right", "MIC+preamp Right", "Mic Preamp Right" },
281
282	{"Left PGA", NULL, "PGA-ADC Mux Left"},
283	{"Right PGA", NULL, "PGA-ADC Mux Right"},
284	};
285
286	static int cs42l51_set_dai_fmt(struct snd_soc_dai *codec_dai,
287	unsigned int format)
288	{
289	struct snd_soc_codec *codec = codec_dai->codec;
290	struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
291	int ret = 0;
292
293	switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
294	case SND_SOC_DAIFMT_I2S:
295	case SND_SOC_DAIFMT_LEFT_J:
296	case SND_SOC_DAIFMT_RIGHT_J:
297	cs42l51->audio_mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
298	break;
299	default:
300	dev_err(codec->dev, "invalid DAI format\n");
301	ret = -EINVAL;
302	}
303
304	switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
305	case SND_SOC_DAIFMT_CBM_CFM:
306	cs42l51->func = MODE_MASTER;
307	break;
308	case SND_SOC_DAIFMT_CBS_CFS:
309	cs42l51->func = MODE_SLAVE_AUTO;
310	break;
311	default:
312	ret = -EINVAL;
313	break;
314	}
315
316	return ret;
317	}
318
319	struct cs42l51_ratios {
320	unsigned int ratio;
321	unsigned char speed_mode;
322	unsigned char mclk;
323	};
324
325	static struct cs42l51_ratios slave_ratios[] = {
326	{ 512, CS42L51_QSM_MODE, 0 }, { 768, CS42L51_QSM_MODE, 0 },
327	{ 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
328	{ 2048, CS42L51_QSM_MODE, 0 }, { 3072, CS42L51_QSM_MODE, 0 },
329	{ 256, CS42L51_HSM_MODE, 0 }, { 384, CS42L51_HSM_MODE, 0 },
330	{ 512, CS42L51_HSM_MODE, 0 }, { 768, CS42L51_HSM_MODE, 0 },
331	{ 1024, CS42L51_HSM_MODE, 0 }, { 1536, CS42L51_HSM_MODE, 0 },
332	{ 128, CS42L51_SSM_MODE, 0 }, { 192, CS42L51_SSM_MODE, 0 },
333	{ 256, CS42L51_SSM_MODE, 0 }, { 384, CS42L51_SSM_MODE, 0 },
334	{ 512, CS42L51_SSM_MODE, 0 }, { 768, CS42L51_SSM_MODE, 0 },
335	{ 128, CS42L51_DSM_MODE, 0 }, { 192, CS42L51_DSM_MODE, 0 },
336	{ 256, CS42L51_DSM_MODE, 0 }, { 384, CS42L51_DSM_MODE, 0 },
337	};
338
339	static struct cs42l51_ratios slave_auto_ratios[] = {
340	{ 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
341	{ 2048, CS42L51_QSM_MODE, 1 }, { 3072, CS42L51_QSM_MODE, 1 },
342	{ 512, CS42L51_HSM_MODE, 0 }, { 768, CS42L51_HSM_MODE, 0 },
343	{ 1024, CS42L51_HSM_MODE, 1 }, { 1536, CS42L51_HSM_MODE, 1 },
344	{ 256, CS42L51_SSM_MODE, 0 }, { 384, CS42L51_SSM_MODE, 0 },
345	{ 512, CS42L51_SSM_MODE, 1 }, { 768, CS42L51_SSM_MODE, 1 },
346	{ 128, CS42L51_DSM_MODE, 0 }, { 192, CS42L51_DSM_MODE, 0 },
347	{ 256, CS42L51_DSM_MODE, 1 }, { 384, CS42L51_DSM_MODE, 1 },
348	};
349
350	static int cs42l51_set_dai_sysclk(struct snd_soc_dai *codec_dai,
351	int clk_id, unsigned int freq, int dir)
352	{
353	struct snd_soc_codec *codec = codec_dai->codec;
354	struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
72ed5a8c	355
72ed5a8c	356	cs42l51->mclk = freq;
72ed5a8c	357	return 0;
	358	}
	359
	360	static int cs42l51_hw_params(struct snd_pcm_substream *substream,
	361	struct snd_pcm_hw_params *params,
	362	struct snd_soc_dai *dai)
	363	{
	364	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	365	struct snd_soc_codec *codec = rtd->codec;
72ed5a8c	366	struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
	367	int ret;
	368	unsigned int i;
	369	unsigned int rate;
	370	unsigned int ratio;
	371	struct cs42l51_ratios *ratios = NULL;
	372	int nr_ratios = 0;
	373	int intf_ctl, power_ctl, fmt;
	374
	375	switch (cs42l51->func) {
	376	case MODE_MASTER:
	377	return -EINVAL;
	378	case MODE_SLAVE:
	379	ratios = slave_ratios;
	380	nr_ratios = ARRAY_SIZE(slave_ratios);
	381	break;
	382	case MODE_SLAVE_AUTO:
	383	ratios = slave_auto_ratios;
	384	nr_ratios = ARRAY_SIZE(slave_auto_ratios);
	385	break;
	386	}
	387
	388	/* Figure out which MCLK/LRCK ratio to use */
	389	rate = params_rate(params); /* Sampling rate, in Hz */
	390	ratio = cs42l51->mclk / rate; /* MCLK/LRCK ratio */
	391	for (i = 0; i < nr_ratios; i++) {
	392	if (ratios[i].ratio == ratio)
	393	break;
	394	}
	395
	396	if (i == nr_ratios) {
	397	/* We did not find a matching ratio */
	398	dev_err(codec->dev, "could not find matching ratio\n");
	399	return -EINVAL;
	400	}
	401
	402	intf_ctl = snd_soc_read(codec, CS42L51_INTF_CTL);
	403	power_ctl = snd_soc_read(codec, CS42L51_MIC_POWER_CTL);
	404
	405	intf_ctl &= ~(CS42L51_INTF_CTL_MASTER \| CS42L51_INTF_CTL_ADC_I2S
	406	\| CS42L51_INTF_CTL_DAC_FORMAT(7));
	407	power_ctl &= ~(CS42L51_MIC_POWER_CTL_SPEED(3)
	408	\| CS42L51_MIC_POWER_CTL_MCLK_DIV2);
	409
	410	switch (cs42l51->func) {
	411	case MODE_MASTER:
	412	intf_ctl \|= CS42L51_INTF_CTL_MASTER;
	413	power_ctl \|= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
	414	break;
	415	case MODE_SLAVE:
	416	power_ctl \|= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
	417	break;
	418	case MODE_SLAVE_AUTO:
	419	power_ctl \|= CS42L51_MIC_POWER_CTL_AUTO;
	420	break;
	421	}
	422
	423	switch (cs42l51->audio_mode) {
	424	case SND_SOC_DAIFMT_I2S:
	425	intf_ctl \|= CS42L51_INTF_CTL_ADC_I2S;
	426	intf_ctl \|= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_I2S);
	427	break;
	428	case SND_SOC_DAIFMT_LEFT_J:
	429	intf_ctl \|= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_LJ24);
430	break;
431	case SND_SOC_DAIFMT_RIGHT_J:
432	switch (params_format(params)) {
433	case SNDRV_PCM_FORMAT_S16_LE:
434	case SNDRV_PCM_FORMAT_S16_BE:
435	fmt = CS42L51_DAC_DIF_RJ16;
436	break;
437	case SNDRV_PCM_FORMAT_S18_3LE:
438	case SNDRV_PCM_FORMAT_S18_3BE:
439	fmt = CS42L51_DAC_DIF_RJ18;
440	break;
441	case SNDRV_PCM_FORMAT_S20_3LE:
442	case SNDRV_PCM_FORMAT_S20_3BE:
443	fmt = CS42L51_DAC_DIF_RJ20;
444	break;
445	case SNDRV_PCM_FORMAT_S24_LE:
446	case SNDRV_PCM_FORMAT_S24_BE:
447	fmt = CS42L51_DAC_DIF_RJ24;
448	break;
449	default:
450	dev_err(codec->dev, "unknown format\n");
451	return -EINVAL;
452	}
453	intf_ctl \|= CS42L51_INTF_CTL_DAC_FORMAT(fmt);
454	break;
455	default:
456	dev_err(codec->dev, "unknown format\n");
457	return -EINVAL;
458	}
459
460	if (ratios[i].mclk)
461	power_ctl \|= CS42L51_MIC_POWER_CTL_MCLK_DIV2;
462
463	ret = snd_soc_write(codec, CS42L51_INTF_CTL, intf_ctl);
464	if (ret < 0)
465	return ret;
466
467	ret = snd_soc_write(codec, CS42L51_MIC_POWER_CTL, power_ctl);
468	if (ret < 0)
469	return ret;
470
471	return 0;
472	}
473
474	static int cs42l51_dai_mute(struct snd_soc_dai *dai, int mute)
475	{
476	struct snd_soc_codec *codec = dai->codec;
477	int reg;
478	int mask = CS42L51_DAC_OUT_CTL_DACA_MUTE\|CS42L51_DAC_OUT_CTL_DACB_MUTE;
479
480	reg = snd_soc_read(codec, CS42L51_DAC_OUT_CTL);
481
482	if (mute)
483	reg \|= mask;
484	else
485	reg &= ~mask;
486
487	return snd_soc_write(codec, CS42L51_DAC_OUT_CTL, reg);
488	}
489
490	static struct snd_soc_dai_ops cs42l51_dai_ops = {
491	.hw_params = cs42l51_hw_params,
492	.set_sysclk = cs42l51_set_dai_sysclk,
493	.set_fmt = cs42l51_set_dai_fmt,
494	.digital_mute = cs42l51_dai_mute,
495	};
496
f0fba2ad LG	497	static struct snd_soc_dai_driver cs42l51_dai = {
f0fba2ad LG	498	.name = "cs42l51-hifi",
72ed5a8c	499	.playback = {
	500	.stream_name = "Playback",
	501	.channels_min = 1,
	502	.channels_max = 2,
	503	.rates = SNDRV_PCM_RATE_8000_96000,
	504	.formats = CS42L51_FORMATS,
	505	},
	506	.capture = {
	507	.stream_name = "Capture",
	508	.channels_min = 1,
	509	.channels_max = 2,
	510	.rates = SNDRV_PCM_RATE_8000_96000,
	511	.formats = CS42L51_FORMATS,
	512	},
	513	.ops = &cs42l51_dai_ops,
	514	};
72ed5a8c	515
f0fba2ad	516	static int cs42l51_probe(struct snd_soc_codec *codec)
72ed5a8c	517	{
f0fba2ad	518	struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
ce6120cc	519	struct snd_soc_dapm_context *dapm = &codec->dapm;
f0fba2ad	520	int ret, reg;
72ed5a8c	521
f0fba2ad LG	522	ret = cs42l51_fill_cache(codec);
	523	if (ret < 0) {
	524	dev_err(codec->dev, "failed to fill register cache\n");
	525	return ret;
	526	}
72ed5a8c	527
f0fba2ad	528	ret = snd_soc_codec_set_cache_io(codec, 8, 8, cs42l51->control_type);
72ed5a8c	529	if (ret < 0) {
f0fba2ad	530	dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
72ed5a8c	531	return ret;
	532	}
	533
f0fba2ad LG	534	/*
	535	* DAC configuration
	536	* - Use signal processor
	537	* - auto mute
	538	* - vol changes immediate
	539	* - no de-emphasize
	540	*/
	541	reg = CS42L51_DAC_CTL_DATA_SEL(1)
	542	\| CS42L51_DAC_CTL_AMUTE \| CS42L51_DAC_CTL_DACSZ(0);
	543	ret = snd_soc_write(codec, CS42L51_DAC_CTL, reg);
	544	if (ret < 0)
	545	return ret;
	546
72ed5a8c	547	snd_soc_add_controls(codec, cs42l51_snd_controls,
72ed5a8c	548	ARRAY_SIZE(cs42l51_snd_controls));
ce6120cc	549	snd_soc_dapm_new_controls(dapm, cs42l51_dapm_widgets,
72ed5a8c	550	ARRAY_SIZE(cs42l51_dapm_widgets));
ce6120cc	551	snd_soc_dapm_add_routes(dapm, cs42l51_routes,
72ed5a8c	552	ARRAY_SIZE(cs42l51_routes));
	553
	554	return 0;
	555	}
	556
f0fba2ad LG	557	static struct snd_soc_codec_driver soc_codec_device_cs42l51 = {
	558	.probe = cs42l51_probe,
	559	.reg_cache_size = CS42L51_NUMREGS,
	560	.reg_word_size = sizeof(u8),
	561	};
72ed5a8c	562
f0fba2ad LG	563	static int cs42l51_i2c_probe(struct i2c_client *i2c_client,
f0fba2ad LG	564	const struct i2c_device_id *id)
72ed5a8c	565	{
f0fba2ad LG	566	struct cs42l51_private *cs42l51;
f0fba2ad LG	567	int ret;
72ed5a8c	568
f0fba2ad LG	569	/* Verify that we have a CS42L51 */
	570	ret = i2c_smbus_read_byte_data(i2c_client, CS42L51_CHIP_REV_ID);
	571	if (ret < 0) {
	572	dev_err(&i2c_client->dev, "failed to read I2C\n");
	573	goto error;
	574	}
	575
	576	if ((ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_A)) &&
	577	(ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_B))) {
	578	dev_err(&i2c_client->dev, "Invalid chip id\n");
	579	ret = -ENODEV;
	580	goto error;
	581	}
	582
	583	dev_info(&i2c_client->dev, "found device cs42l51 rev %d\n",
	584	ret & 7);
	585
	586	cs42l51 = kzalloc(sizeof(struct cs42l51_private), GFP_KERNEL);
	587	if (!cs42l51) {
	588	dev_err(&i2c_client->dev, "could not allocate codec\n");
	589	return -ENOMEM;
	590	}
	591
	592	i2c_set_clientdata(i2c_client, cs42l51);
f0fba2ad	593	cs42l51->control_type = SND_SOC_I2C;
72ed5a8c	594
f0fba2ad LG	595	ret = snd_soc_register_codec(&i2c_client->dev,
	596	&soc_codec_device_cs42l51, &cs42l51_dai, 1);
	597	if (ret < 0)
	598	kfree(cs42l51);
	599	error:
	600	return ret;
	601	}
	602
	603	static int cs42l51_i2c_remove(struct i2c_client *client)
	604	{
	605	struct cs42l51_private *cs42l51 = i2c_get_clientdata(client);
	606
	607	snd_soc_unregister_codec(&client->dev);
	608	kfree(cs42l51);
72ed5a8c	609	return 0;
	610	}
	611
f0fba2ad LG	612	static const struct i2c_device_id cs42l51_id[] = {
	613	{"cs42l51", 0},
	614	{}
	615	};
	616	MODULE_DEVICE_TABLE(i2c, cs42l51_id);
	617
	618	static struct i2c_driver cs42l51_i2c_driver = {
	619	.driver = {
c88e7b93	620	.name = "cs42l51-codec",
f0fba2ad LG	621	.owner = THIS_MODULE,
	622	},
	623	.id_table = cs42l51_id,
	624	.probe = cs42l51_i2c_probe,
	625	.remove = cs42l51_i2c_remove,
72ed5a8c	626	};
72ed5a8c	627
	628	static int __init cs42l51_init(void)
	629	{
	630	int ret;
	631
	632	ret = i2c_add_driver(&cs42l51_i2c_driver);
	633	if (ret != 0) {
	634	printk(KERN_ERR "%s: can't add i2c driver\n", __func__);
	635	return ret;
	636	}
	637	return 0;
	638	}
	639	module_init(cs42l51_init);
	640
	641	static void __exit cs42l51_exit(void)
	642	{
	643	i2c_del_driver(&cs42l51_i2c_driver);
	644	}
	645	module_exit(cs42l51_exit);
	646
69737897	647	MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
72ed5a8c	648	MODULE_DESCRIPTION("Cirrus Logic CS42L51 ALSA SoC Codec Driver");
72ed5a8c	649	MODULE_LICENSE("GPL");