[deliverable/linux.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;
	void *control_data;
	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 = codec->control_data;
	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;

	codec->control_data = cs42l51->control_data;

	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_data = i2c_client;
	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 LG	44	enum snd_soc_control_type control_type;
f0fba2ad LG	45	void *control_data;
72ed5a8c	46	unsigned int mclk;
	47	unsigned int audio_mode; /* The mode (I2S or left-justified) */
	48	enum master_slave_mode func;
72ed5a8c	49	};
72ed5a8c	50
72ed5a8c	51	#define CS42L51_FORMATS ( \
	52	SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S16_BE \| \
	53	SNDRV_PCM_FMTBIT_S18_3LE \| SNDRV_PCM_FMTBIT_S18_3BE \| \
	54	SNDRV_PCM_FMTBIT_S20_3LE \| SNDRV_PCM_FMTBIT_S20_3BE \| \
	55	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S24_BE)
	56
	57	static int cs42l51_fill_cache(struct snd_soc_codec *codec)
	58	{
	59	u8 *cache = codec->reg_cache + 1;
	60	struct i2c_client *i2c_client = codec->control_data;
	61	s32 length;
	62
	63	length = i2c_smbus_read_i2c_block_data(i2c_client,
	64	CS42L51_FIRSTREG \| 0x80, CS42L51_NUMREGS, cache);
	65	if (length != CS42L51_NUMREGS) {
	66	dev_err(&i2c_client->dev,
	67	"I2C read failure, addr=0x%x (ret=%d vs %d)\n",
	68	i2c_client->addr, length, CS42L51_NUMREGS);
	69	return -EIO;
	70	}
	71
	72	return 0;
	73	}
	74
72ed5a8c	75	static int cs42l51_get_chan_mix(struct snd_kcontrol *kcontrol,
	76	struct snd_ctl_elem_value *ucontrol)
	77	{
	78	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	79	unsigned long value = snd_soc_read(codec, CS42L51_PCM_MIXER)&3;
	80
	81	switch (value) {
	82	default:
	83	case 0:
	84	ucontrol->value.integer.value[0] = 0;
	85	break;
	86	/* same value : (L+R)/2 and (R+L)/2 */
	87	case 1:
	88	case 2:
	89	ucontrol->value.integer.value[0] = 1;
	90	break;
	91	case 3:
	92	ucontrol->value.integer.value[0] = 2;
	93	break;
	94	}
	95
	96	return 0;
	97	}
	98
	99	#define CHAN_MIX_NORMAL 0x00
	100	#define CHAN_MIX_BOTH 0x55
	101	#define CHAN_MIX_SWAP 0xFF
	102
	103	static int cs42l51_set_chan_mix(struct snd_kcontrol *kcontrol,
	104	struct snd_ctl_elem_value *ucontrol)
	105	{
	106	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	107	unsigned char val;
	108
	109	switch (ucontrol->value.integer.value[0]) {
	110	default:
	111	case 0:
	112	val = CHAN_MIX_NORMAL;
	113	break;
	114	case 1:
	115	val = CHAN_MIX_BOTH;
	116	break;
	117	case 2:
	118	val = CHAN_MIX_SWAP;
	119	break;
	120	}
	121
	122	snd_soc_write(codec, CS42L51_PCM_MIXER, val);
	123
	124	return 1;
	125	}
	126
	127	static const DECLARE_TLV_DB_SCALE(adc_pcm_tlv, -5150, 50, 0);
	128	static const DECLARE_TLV_DB_SCALE(tone_tlv, -1050, 150, 0);
	129	/* This is a lie. after -102 db, it stays at -102 */
	130	/* maybe a range would be better */
	131	static const DECLARE_TLV_DB_SCALE(aout_tlv, -11550, 50, 0);
	132
	133	static const DECLARE_TLV_DB_SCALE(boost_tlv, 1600, 1600, 0);
	134	static const char *chan_mix[] = {
	135	"L R",
	136	"L+R",
	137	"R L",
	138	};
139
140	static const struct soc_enum cs42l51_chan_mix =
141	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(chan_mix), chan_mix);
142
143	static const struct snd_kcontrol_new cs42l51_snd_controls[] = {
144	SOC_DOUBLE_R_SX_TLV("PCM Playback Volume",
145	CS42L51_PCMA_VOL, CS42L51_PCMB_VOL,
146	7, 0xffffff99, 0x18, adc_pcm_tlv),
147	SOC_DOUBLE_R("PCM Playback Switch",
148	CS42L51_PCMA_VOL, CS42L51_PCMB_VOL, 7, 1, 1),
149	SOC_DOUBLE_R_SX_TLV("Analog Playback Volume",
150	CS42L51_AOUTA_VOL, CS42L51_AOUTB_VOL,
151	8, 0xffffff19, 0x18, aout_tlv),
152	SOC_DOUBLE_R_SX_TLV("ADC Mixer Volume",
153	CS42L51_ADCA_VOL, CS42L51_ADCB_VOL,
154	7, 0xffffff99, 0x18, adc_pcm_tlv),
155	SOC_DOUBLE_R("ADC Mixer Switch",
156	CS42L51_ADCA_VOL, CS42L51_ADCB_VOL, 7, 1, 1),
157	SOC_SINGLE("Playback Deemphasis Switch", CS42L51_DAC_CTL, 3, 1, 0),
158	SOC_SINGLE("Auto-Mute Switch", CS42L51_DAC_CTL, 2, 1, 0),
159	SOC_SINGLE("Soft Ramp Switch", CS42L51_DAC_CTL, 1, 1, 0),
160	SOC_SINGLE("Zero Cross Switch", CS42L51_DAC_CTL, 0, 0, 0),
161	SOC_DOUBLE_TLV("Mic Boost Volume",
162	CS42L51_MIC_CTL, 0, 1, 1, 0, boost_tlv),
163	SOC_SINGLE_TLV("Bass Volume", CS42L51_TONE_CTL, 0, 0xf, 1, tone_tlv),
164	SOC_SINGLE_TLV("Treble Volume", CS42L51_TONE_CTL, 4, 0xf, 1, tone_tlv),
165	SOC_ENUM_EXT("PCM channel mixer",
166	cs42l51_chan_mix,
167	cs42l51_get_chan_mix, cs42l51_set_chan_mix),
168	};
169
170	/*
171	* to power down, one must:
172	* 1.) Enable the PDN bit
173	* 2.) enable power-down for the select channels
174	* 3.) disable the PDN bit.
175	*/
176	static int cs42l51_pdn_event(struct snd_soc_dapm_widget *w,
177	struct snd_kcontrol *kcontrol, int event)
178	{
179	unsigned long value;
180
181	value = snd_soc_read(w->codec, CS42L51_POWER_CTL1);
182	value &= ~CS42L51_POWER_CTL1_PDN;
183
184	switch (event) {
185	case SND_SOC_DAPM_PRE_PMD:
186	value \|= CS42L51_POWER_CTL1_PDN;
187	break;
188	default:
189	case SND_SOC_DAPM_POST_PMD:
190	break;
191	}
192	snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1,
193	CS42L51_POWER_CTL1_PDN, value);
194
195	return 0;
196	}
197
198	static const char *cs42l51_dac_names[] = {"Direct PCM",
199	"DSP PCM", "ADC"};
200	static const struct soc_enum cs42l51_dac_mux_enum =
201	SOC_ENUM_SINGLE(CS42L51_DAC_CTL, 6, 3, cs42l51_dac_names);
202	static const struct snd_kcontrol_new cs42l51_dac_mux_controls =
203	SOC_DAPM_ENUM("Route", cs42l51_dac_mux_enum);
204
205	static const char *cs42l51_adcl_names[] = {"AIN1 Left", "AIN2 Left",
206	"MIC Left", "MIC+preamp Left"};
207	static const struct soc_enum cs42l51_adcl_mux_enum =
208	SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 4, 4, cs42l51_adcl_names);
209	static const struct snd_kcontrol_new cs42l51_adcl_mux_controls =
210	SOC_DAPM_ENUM("Route", cs42l51_adcl_mux_enum);
211
212	static const char *cs42l51_adcr_names[] = {"AIN1 Right", "AIN2 Right",
213	"MIC Right", "MIC+preamp Right"};
214	static const struct soc_enum cs42l51_adcr_mux_enum =
215	SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 6, 4, cs42l51_adcr_names);
216	static const struct snd_kcontrol_new cs42l51_adcr_mux_controls =
217	SOC_DAPM_ENUM("Route", cs42l51_adcr_mux_enum);
218
219	static const struct snd_soc_dapm_widget cs42l51_dapm_widgets[] = {
220	SND_SOC_DAPM_MICBIAS("Mic Bias", CS42L51_MIC_POWER_CTL, 1, 1),
221	SND_SOC_DAPM_PGA_E("Left PGA", CS42L51_POWER_CTL1, 3, 1, NULL, 0,
222	cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
223	SND_SOC_DAPM_PGA_E("Right PGA", CS42L51_POWER_CTL1, 4, 1, NULL, 0,
224	cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
225	SND_SOC_DAPM_ADC_E("Left ADC", "Left HiFi Capture",
226	CS42L51_POWER_CTL1, 1, 1,
227	cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
228	SND_SOC_DAPM_ADC_E("Right ADC", "Right HiFi Capture",
229	CS42L51_POWER_CTL1, 2, 1,
230	cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
231	SND_SOC_DAPM_DAC_E("Left DAC", "Left HiFi Playback",
232	CS42L51_POWER_CTL1, 5, 1,
233	cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
234	SND_SOC_DAPM_DAC_E("Right DAC", "Right HiFi Playback",
235	CS42L51_POWER_CTL1, 6, 1,
236	cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
237
238	/* analog/mic */
239	SND_SOC_DAPM_INPUT("AIN1L"),
240	SND_SOC_DAPM_INPUT("AIN1R"),
241	SND_SOC_DAPM_INPUT("AIN2L"),
242	SND_SOC_DAPM_INPUT("AIN2R"),
243	SND_SOC_DAPM_INPUT("MICL"),
244	SND_SOC_DAPM_INPUT("MICR"),
245
246	SND_SOC_DAPM_MIXER("Mic Preamp Left",
247	CS42L51_MIC_POWER_CTL, 2, 1, NULL, 0),
248	SND_SOC_DAPM_MIXER("Mic Preamp Right",
249	CS42L51_MIC_POWER_CTL, 3, 1, NULL, 0),
250
251	/* HP */
252	SND_SOC_DAPM_OUTPUT("HPL"),
253	SND_SOC_DAPM_OUTPUT("HPR"),
254
255	/* mux */
256	SND_SOC_DAPM_MUX("DAC Mux", SND_SOC_NOPM, 0, 0,
257	&cs42l51_dac_mux_controls),
258	SND_SOC_DAPM_MUX("PGA-ADC Mux Left", SND_SOC_NOPM, 0, 0,
259	&cs42l51_adcl_mux_controls),
260	SND_SOC_DAPM_MUX("PGA-ADC Mux Right", SND_SOC_NOPM, 0, 0,
261	&cs42l51_adcr_mux_controls),
262	};
263
264	static const struct snd_soc_dapm_route cs42l51_routes[] = {
265	{"HPL", NULL, "Left DAC"},
266	{"HPR", NULL, "Right DAC"},
267
268	{"Left ADC", NULL, "Left PGA"},
269	{"Right ADC", NULL, "Right PGA"},
270
271	{"Mic Preamp Left", NULL, "MICL"},
272	{"Mic Preamp Right", NULL, "MICR"},
273
274	{"PGA-ADC Mux Left", "AIN1 Left", "AIN1L" },
275	{"PGA-ADC Mux Left", "AIN2 Left", "AIN2L" },
276	{"PGA-ADC Mux Left", "MIC Left", "MICL" },
277	{"PGA-ADC Mux Left", "MIC+preamp Left", "Mic Preamp Left" },
278	{"PGA-ADC Mux Right", "AIN1 Right", "AIN1R" },
279	{"PGA-ADC Mux Right", "AIN2 Right", "AIN2R" },
280	{"PGA-ADC Mux Right", "MIC Right", "MICR" },
281	{"PGA-ADC Mux Right", "MIC+preamp Right", "Mic Preamp Right" },
282
283	{"Left PGA", NULL, "PGA-ADC Mux Left"},
284	{"Right PGA", NULL, "PGA-ADC Mux Right"},
285	};
286
287	static int cs42l51_set_dai_fmt(struct snd_soc_dai *codec_dai,
288	unsigned int format)
289	{
290	struct snd_soc_codec *codec = codec_dai->codec;
291	struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
292	int ret = 0;
293
294	switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
295	case SND_SOC_DAIFMT_I2S:
296	case SND_SOC_DAIFMT_LEFT_J:
297	case SND_SOC_DAIFMT_RIGHT_J:
298	cs42l51->audio_mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
299	break;
300	default:
301	dev_err(codec->dev, "invalid DAI format\n");
302	ret = -EINVAL;
303	}
304
305	switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
306	case SND_SOC_DAIFMT_CBM_CFM:
307	cs42l51->func = MODE_MASTER;
308	break;
309	case SND_SOC_DAIFMT_CBS_CFS:
310	cs42l51->func = MODE_SLAVE_AUTO;
311	break;
312	default:
313	ret = -EINVAL;
314	break;
315	}
316
317	return ret;
318	}
319
320	struct cs42l51_ratios {
321	unsigned int ratio;
322	unsigned char speed_mode;
323	unsigned char mclk;
324	};
325
326	static struct cs42l51_ratios slave_ratios[] = {
327	{ 512, CS42L51_QSM_MODE, 0 }, { 768, CS42L51_QSM_MODE, 0 },
328	{ 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
329	{ 2048, CS42L51_QSM_MODE, 0 }, { 3072, CS42L51_QSM_MODE, 0 },
330	{ 256, CS42L51_HSM_MODE, 0 }, { 384, CS42L51_HSM_MODE, 0 },
331	{ 512, CS42L51_HSM_MODE, 0 }, { 768, CS42L51_HSM_MODE, 0 },
332	{ 1024, CS42L51_HSM_MODE, 0 }, { 1536, CS42L51_HSM_MODE, 0 },
333	{ 128, CS42L51_SSM_MODE, 0 }, { 192, CS42L51_SSM_MODE, 0 },
334	{ 256, CS42L51_SSM_MODE, 0 }, { 384, CS42L51_SSM_MODE, 0 },
335	{ 512, CS42L51_SSM_MODE, 0 }, { 768, CS42L51_SSM_MODE, 0 },
336	{ 128, CS42L51_DSM_MODE, 0 }, { 192, CS42L51_DSM_MODE, 0 },
337	{ 256, CS42L51_DSM_MODE, 0 }, { 384, CS42L51_DSM_MODE, 0 },
338	};
339
340	static struct cs42l51_ratios slave_auto_ratios[] = {
341	{ 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
342	{ 2048, CS42L51_QSM_MODE, 1 }, { 3072, CS42L51_QSM_MODE, 1 },
343	{ 512, CS42L51_HSM_MODE, 0 }, { 768, CS42L51_HSM_MODE, 0 },
344	{ 1024, CS42L51_HSM_MODE, 1 }, { 1536, CS42L51_HSM_MODE, 1 },
345	{ 256, CS42L51_SSM_MODE, 0 }, { 384, CS42L51_SSM_MODE, 0 },
346	{ 512, CS42L51_SSM_MODE, 1 }, { 768, CS42L51_SSM_MODE, 1 },
347	{ 128, CS42L51_DSM_MODE, 0 }, { 192, CS42L51_DSM_MODE, 0 },
348	{ 256, CS42L51_DSM_MODE, 1 }, { 384, CS42L51_DSM_MODE, 1 },
349	};
350
351	static int cs42l51_set_dai_sysclk(struct snd_soc_dai *codec_dai,
352	int clk_id, unsigned int freq, int dir)
353	{
354	struct snd_soc_codec *codec = codec_dai->codec;
355	struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
72ed5a8c	356
72ed5a8c	357	cs42l51->mclk = freq;
72ed5a8c	358	return 0;
	359	}
	360
	361	static int cs42l51_hw_params(struct snd_pcm_substream *substream,
	362	struct snd_pcm_hw_params *params,
	363	struct snd_soc_dai *dai)
	364	{
	365	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	366	struct snd_soc_codec *codec = rtd->codec;
72ed5a8c	367	struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
	368	int ret;
	369	unsigned int i;
	370	unsigned int rate;
	371	unsigned int ratio;
	372	struct cs42l51_ratios *ratios = NULL;
	373	int nr_ratios = 0;
	374	int intf_ctl, power_ctl, fmt;
	375
	376	switch (cs42l51->func) {
	377	case MODE_MASTER:
	378	return -EINVAL;
	379	case MODE_SLAVE:
	380	ratios = slave_ratios;
	381	nr_ratios = ARRAY_SIZE(slave_ratios);
	382	break;
	383	case MODE_SLAVE_AUTO:
	384	ratios = slave_auto_ratios;
	385	nr_ratios = ARRAY_SIZE(slave_auto_ratios);
	386	break;
	387	}
	388
	389	/* Figure out which MCLK/LRCK ratio to use */
	390	rate = params_rate(params); /* Sampling rate, in Hz */
	391	ratio = cs42l51->mclk / rate; /* MCLK/LRCK ratio */
	392	for (i = 0; i < nr_ratios; i++) {
	393	if (ratios[i].ratio == ratio)
	394	break;
	395	}
	396
	397	if (i == nr_ratios) {
	398	/* We did not find a matching ratio */
	399	dev_err(codec->dev, "could not find matching ratio\n");
	400	return -EINVAL;
	401	}
	402
	403	intf_ctl = snd_soc_read(codec, CS42L51_INTF_CTL);
	404	power_ctl = snd_soc_read(codec, CS42L51_MIC_POWER_CTL);
	405
	406	intf_ctl &= ~(CS42L51_INTF_CTL_MASTER \| CS42L51_INTF_CTL_ADC_I2S
	407	\| CS42L51_INTF_CTL_DAC_FORMAT(7));
	408	power_ctl &= ~(CS42L51_MIC_POWER_CTL_SPEED(3)
	409	\| CS42L51_MIC_POWER_CTL_MCLK_DIV2);
	410
	411	switch (cs42l51->func) {
	412	case MODE_MASTER:
	413	intf_ctl \|= CS42L51_INTF_CTL_MASTER;
	414	power_ctl \|= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
	415	break;
	416	case MODE_SLAVE:
	417	power_ctl \|= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
	418	break;
	419	case MODE_SLAVE_AUTO:
	420	power_ctl \|= CS42L51_MIC_POWER_CTL_AUTO;
	421	break;
	422	}
	423
	424	switch (cs42l51->audio_mode) {
	425	case SND_SOC_DAIFMT_I2S:
	426	intf_ctl \|= CS42L51_INTF_CTL_ADC_I2S;
	427	intf_ctl \|= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_I2S);
	428	break;
	429	case SND_SOC_DAIFMT_LEFT_J:
	430	intf_ctl \|= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_LJ24);
431	break;
432	case SND_SOC_DAIFMT_RIGHT_J:
433	switch (params_format(params)) {
434	case SNDRV_PCM_FORMAT_S16_LE:
435	case SNDRV_PCM_FORMAT_S16_BE:
436	fmt = CS42L51_DAC_DIF_RJ16;
437	break;
438	case SNDRV_PCM_FORMAT_S18_3LE:
439	case SNDRV_PCM_FORMAT_S18_3BE:
440	fmt = CS42L51_DAC_DIF_RJ18;
441	break;
442	case SNDRV_PCM_FORMAT_S20_3LE:
443	case SNDRV_PCM_FORMAT_S20_3BE:
444	fmt = CS42L51_DAC_DIF_RJ20;
445	break;
446	case SNDRV_PCM_FORMAT_S24_LE:
447	case SNDRV_PCM_FORMAT_S24_BE:
448	fmt = CS42L51_DAC_DIF_RJ24;
449	break;
450	default:
451	dev_err(codec->dev, "unknown format\n");
452	return -EINVAL;
453	}
454	intf_ctl \|= CS42L51_INTF_CTL_DAC_FORMAT(fmt);
455	break;
456	default:
457	dev_err(codec->dev, "unknown format\n");
458	return -EINVAL;
459	}
460
461	if (ratios[i].mclk)
462	power_ctl \|= CS42L51_MIC_POWER_CTL_MCLK_DIV2;
463
464	ret = snd_soc_write(codec, CS42L51_INTF_CTL, intf_ctl);
465	if (ret < 0)
466	return ret;
467
468	ret = snd_soc_write(codec, CS42L51_MIC_POWER_CTL, power_ctl);
469	if (ret < 0)
470	return ret;
471
472	return 0;
473	}
474
475	static int cs42l51_dai_mute(struct snd_soc_dai *dai, int mute)
476	{
477	struct snd_soc_codec *codec = dai->codec;
478	int reg;
479	int mask = CS42L51_DAC_OUT_CTL_DACA_MUTE\|CS42L51_DAC_OUT_CTL_DACB_MUTE;
480
481	reg = snd_soc_read(codec, CS42L51_DAC_OUT_CTL);
482
483	if (mute)
484	reg \|= mask;
485	else
486	reg &= ~mask;
487
488	return snd_soc_write(codec, CS42L51_DAC_OUT_CTL, reg);
489	}
490
491	static struct snd_soc_dai_ops cs42l51_dai_ops = {
492	.hw_params = cs42l51_hw_params,
493	.set_sysclk = cs42l51_set_dai_sysclk,
494	.set_fmt = cs42l51_set_dai_fmt,
495	.digital_mute = cs42l51_dai_mute,
496	};
497
f0fba2ad LG	498	static struct snd_soc_dai_driver cs42l51_dai = {
f0fba2ad LG	499	.name = "cs42l51-hifi",
72ed5a8c	500	.playback = {
	501	.stream_name = "Playback",
	502	.channels_min = 1,
	503	.channels_max = 2,
	504	.rates = SNDRV_PCM_RATE_8000_96000,
	505	.formats = CS42L51_FORMATS,
	506	},
	507	.capture = {
	508	.stream_name = "Capture",
	509	.channels_min = 1,
	510	.channels_max = 2,
	511	.rates = SNDRV_PCM_RATE_8000_96000,
	512	.formats = CS42L51_FORMATS,
	513	},
	514	.ops = &cs42l51_dai_ops,
	515	};
72ed5a8c	516
f0fba2ad	517	static int cs42l51_probe(struct snd_soc_codec *codec)
72ed5a8c	518	{
f0fba2ad	519	struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
ce6120cc	520	struct snd_soc_dapm_context *dapm = &codec->dapm;
f0fba2ad	521	int ret, reg;
72ed5a8c	522
f0fba2ad	523	codec->control_data = cs42l51->control_data;
72ed5a8c	524
f0fba2ad LG	525	ret = cs42l51_fill_cache(codec);
	526	if (ret < 0) {
	527	dev_err(codec->dev, "failed to fill register cache\n");
	528	return ret;
	529	}
72ed5a8c	530
f0fba2ad	531	ret = snd_soc_codec_set_cache_io(codec, 8, 8, cs42l51->control_type);
72ed5a8c	532	if (ret < 0) {
f0fba2ad	533	dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
72ed5a8c	534	return ret;
	535	}
	536
f0fba2ad LG	537	/*
	538	* DAC configuration
	539	* - Use signal processor
	540	* - auto mute
	541	* - vol changes immediate
	542	* - no de-emphasize
	543	*/
	544	reg = CS42L51_DAC_CTL_DATA_SEL(1)
	545	\| CS42L51_DAC_CTL_AMUTE \| CS42L51_DAC_CTL_DACSZ(0);
	546	ret = snd_soc_write(codec, CS42L51_DAC_CTL, reg);
	547	if (ret < 0)
	548	return ret;
	549
72ed5a8c	550	snd_soc_add_controls(codec, cs42l51_snd_controls,
72ed5a8c	551	ARRAY_SIZE(cs42l51_snd_controls));
ce6120cc	552	snd_soc_dapm_new_controls(dapm, cs42l51_dapm_widgets,
72ed5a8c	553	ARRAY_SIZE(cs42l51_dapm_widgets));
ce6120cc	554	snd_soc_dapm_add_routes(dapm, cs42l51_routes,
72ed5a8c	555	ARRAY_SIZE(cs42l51_routes));
	556
	557	return 0;
	558	}
	559
f0fba2ad LG	560	static struct snd_soc_codec_driver soc_codec_device_cs42l51 = {
	561	.probe = cs42l51_probe,
	562	.reg_cache_size = CS42L51_NUMREGS,
	563	.reg_word_size = sizeof(u8),
	564	};
72ed5a8c	565
f0fba2ad LG	566	static int cs42l51_i2c_probe(struct i2c_client *i2c_client,
f0fba2ad LG	567	const struct i2c_device_id *id)
72ed5a8c	568	{
f0fba2ad LG	569	struct cs42l51_private *cs42l51;
f0fba2ad LG	570	int ret;
72ed5a8c	571
f0fba2ad LG	572	/* Verify that we have a CS42L51 */
	573	ret = i2c_smbus_read_byte_data(i2c_client, CS42L51_CHIP_REV_ID);
	574	if (ret < 0) {
	575	dev_err(&i2c_client->dev, "failed to read I2C\n");
	576	goto error;
	577	}
	578
	579	if ((ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_A)) &&
	580	(ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_B))) {
	581	dev_err(&i2c_client->dev, "Invalid chip id\n");
	582	ret = -ENODEV;
	583	goto error;
	584	}
	585
	586	dev_info(&i2c_client->dev, "found device cs42l51 rev %d\n",
	587	ret & 7);
	588
	589	cs42l51 = kzalloc(sizeof(struct cs42l51_private), GFP_KERNEL);
	590	if (!cs42l51) {
	591	dev_err(&i2c_client->dev, "could not allocate codec\n");
	592	return -ENOMEM;
	593	}
	594
	595	i2c_set_clientdata(i2c_client, cs42l51);
	596	cs42l51->control_data = i2c_client;
	597	cs42l51->control_type = SND_SOC_I2C;
72ed5a8c	598
f0fba2ad LG	599	ret = snd_soc_register_codec(&i2c_client->dev,
	600	&soc_codec_device_cs42l51, &cs42l51_dai, 1);
	601	if (ret < 0)
	602	kfree(cs42l51);
	603	error:
	604	return ret;
	605	}
	606
	607	static int cs42l51_i2c_remove(struct i2c_client *client)
	608	{
	609	struct cs42l51_private *cs42l51 = i2c_get_clientdata(client);
	610
	611	snd_soc_unregister_codec(&client->dev);
	612	kfree(cs42l51);
72ed5a8c	613	return 0;
	614	}
	615
f0fba2ad LG	616	static const struct i2c_device_id cs42l51_id[] = {
	617	{"cs42l51", 0},
	618	{}
	619	};
	620	MODULE_DEVICE_TABLE(i2c, cs42l51_id);
	621
	622	static struct i2c_driver cs42l51_i2c_driver = {
	623	.driver = {
c88e7b93	624	.name = "cs42l51-codec",
f0fba2ad LG	625	.owner = THIS_MODULE,
	626	},
	627	.id_table = cs42l51_id,
	628	.probe = cs42l51_i2c_probe,
	629	.remove = cs42l51_i2c_remove,
72ed5a8c	630	};
72ed5a8c	631
	632	static int __init cs42l51_init(void)
	633	{
	634	int ret;
	635
	636	ret = i2c_add_driver(&cs42l51_i2c_driver);
	637	if (ret != 0) {
	638	printk(KERN_ERR "%s: can't add i2c driver\n", __func__);
	639	return ret;
	640	}
	641	return 0;
	642	}
	643	module_init(cs42l51_init);
	644
	645	static void __exit cs42l51_exit(void)
	646	{
	647	i2c_del_driver(&cs42l51_i2c_driver);
	648	}
	649	module_exit(cs42l51_exit);
	650
69737897	651	MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
72ed5a8c	652	MODULE_DESCRIPTION("Cirrus Logic CS42L51 ALSA SoC Codec Driver");
72ed5a8c	653	MODULE_LICENSE("GPL");