linux-vybrid_public/sound/soc/codecs/max9877.c

/*
 * max9877.c  --  amp driver for max9877
 *
 * Copyright (C) 2009 Samsung Electronics Co.Ltd
 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <sound/soc.h>
#include <sound/tlv.h>

#include "max9877.h"

static struct regmap *regmap;

static struct reg_default max9877_regs[] = {
	{ 0, 0x40 },
	{ 1, 0x00 },
	{ 2, 0x00 },
	{ 3, 0x00 },
	{ 4, 0x49 },
};

static int max9877_get_reg(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int mask = mc->max;
	unsigned int invert = mc->invert;
	unsigned int val;
	int ret;

	ret = regmap_read(regmap, reg, &val);
	if (ret != 0)
		return ret;

	ucontrol->value.integer.value[0] = (val >> shift) & mask;

	if (invert)
		ucontrol->value.integer.value[0] =
			mask - ucontrol->value.integer.value[0];

	return 0;
}

static int max9877_set_reg(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int mask = mc->max;
	unsigned int invert = mc->invert;
	unsigned int val = (ucontrol->value.integer.value[0] & mask);
	bool change;
	int ret;

	if (invert)
		val = mask - val;

	ret = regmap_update_bits_check(regmap, reg, mask << shift,
				       val << shift, &change);
	if (ret != 0)
		return ret;

	if (change)
		return 1;
	else
		return 0;
}

static int max9877_get_2reg(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
	unsigned int mask = mc->max;
	unsigned int val;
	int ret;

	ret = regmap_read(regmap, reg, &val);
	if (ret != 0)
		return ret;
	ucontrol->value.integer.value[0] = (val >> shift) & mask;

	ret = regmap_read(regmap, reg2, &val);
	if (ret != 0)
		return ret;
	ucontrol->value.integer.value[1] = (val >> shift) & mask;

	return 0;
}

static int max9877_set_2reg(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
	unsigned int mask = mc->max;
	unsigned int val = (ucontrol->value.integer.value[0] & mask);
	unsigned int val2 = (ucontrol->value.integer.value[1] & mask);
	bool change1, change2;
	int ret;

	ret = regmap_update_bits_check(regmap, reg, mask << shift,
				       val << shift, &change1);
	if (ret != 0)
		return ret;

	ret = regmap_update_bits_check(regmap, reg2, mask << shift,
				       val2 << shift, &change2);
	if (ret != 0)
		return ret;

	if (change1 || change2)
		return 1;
	else
		return 0;
}

static int max9877_get_out_mode(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	unsigned int val;
	int ret;

	ret = regmap_read(regmap, MAX9877_OUTPUT_MODE, &val);
	if (ret != 0)
		return ret;

	val &= MAX9877_OUTMODE_MASK;
	if (val)
		val--;

	ucontrol->value.integer.value[0] = val;

	return 0;
}

static int max9877_set_out_mode(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	unsigned int val;
	bool change;
	int ret;

	val = ucontrol->value.integer.value[0] + 1;

	ret = regmap_update_bits_check(regmap, MAX9877_OUTPUT_MODE,
				       MAX9877_OUTMODE_MASK, val, &change);
	if (ret != 0)
		return ret;

	if (change)
		return 1;
	else
		return 0;
}

static int max9877_get_osc_mode(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	unsigned int val;
	int ret;

	ret = regmap_read(regmap, MAX9877_OUTPUT_MODE, &val);
	if (ret != 0)
		return ret;

	val &= MAX9877_OSC_MASK;
	val >>= MAX9877_OSC_OFFSET;

	ucontrol->value.integer.value[0] = val;

	return 0;
}

static int max9877_set_osc_mode(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	unsigned int val;
	bool change;
	int ret;

	val = ucontrol->value.integer.value[0] << MAX9877_OSC_OFFSET;
	ret = regmap_update_bits_check(regmap, MAX9877_OUTPUT_MODE,
				       MAX9877_OSC_MASK, val, &change);
	if (ret != 0)
		return ret;

	if (change)
		return 1;
	else
		return 0;
}

static const unsigned int max9877_pgain_tlv[] = {
	TLV_DB_RANGE_HEAD(2),
	0, 1, TLV_DB_SCALE_ITEM(0, 900, 0),
	2, 2, TLV_DB_SCALE_ITEM(2000, 0, 0),
};

static const unsigned int max9877_output_tlv[] = {
	TLV_DB_RANGE_HEAD(4),
	0, 7, TLV_DB_SCALE_ITEM(-7900, 400, 1),
	8, 15, TLV_DB_SCALE_ITEM(-4700, 300, 0),
	16, 23, TLV_DB_SCALE_ITEM(-2300, 200, 0),
	24, 31, TLV_DB_SCALE_ITEM(-700, 100, 0),
};

static const char *max9877_out_mode[] = {
	"INA -> SPK",
	"INA -> HP",
	"INA -> SPK and HP",
	"INB -> SPK",
	"INB -> HP",
	"INB -> SPK and HP",
	"INA + INB -> SPK",
	"INA + INB -> HP",
	"INA + INB -> SPK and HP",
};

static const char *max9877_osc_mode[] = {
	"1176KHz",
	"1100KHz",
	"700KHz",
};

static const struct soc_enum max9877_enum[] = {
	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(max9877_out_mode), max9877_out_mode),
	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(max9877_osc_mode), max9877_osc_mode),
};

static const struct snd_kcontrol_new max9877_controls[] = {
	SOC_SINGLE_EXT_TLV("MAX9877 PGAINA Playback Volume",
			MAX9877_INPUT_MODE, 0, 2, 0,
			max9877_get_reg, max9877_set_reg, max9877_pgain_tlv),
	SOC_SINGLE_EXT_TLV("MAX9877 PGAINB Playback Volume",
			MAX9877_INPUT_MODE, 2, 2, 0,
			max9877_get_reg, max9877_set_reg, max9877_pgain_tlv),
	SOC_SINGLE_EXT_TLV("MAX9877 Amp Speaker Playback Volume",
			MAX9877_SPK_VOLUME, 0, 31, 0,
			max9877_get_reg, max9877_set_reg, max9877_output_tlv),
	SOC_DOUBLE_R_EXT_TLV("MAX9877 Amp HP Playback Volume",
			MAX9877_HPL_VOLUME, MAX9877_HPR_VOLUME, 0, 31, 0,
			max9877_get_2reg, max9877_set_2reg, max9877_output_tlv),
	SOC_SINGLE_EXT("MAX9877 INB Stereo Switch",
			MAX9877_INPUT_MODE, 4, 1, 1,
			max9877_get_reg, max9877_set_reg),
	SOC_SINGLE_EXT("MAX9877 INA Stereo Switch",
			MAX9877_INPUT_MODE, 5, 1, 1,
			max9877_get_reg, max9877_set_reg),
	SOC_SINGLE_EXT("MAX9877 Zero-crossing detection Switch",
			MAX9877_INPUT_MODE, 6, 1, 0,
			max9877_get_reg, max9877_set_reg),
	SOC_SINGLE_EXT("MAX9877 Bypass Mode Switch",
			MAX9877_OUTPUT_MODE, 6, 1, 0,
			max9877_get_reg, max9877_set_reg),
	SOC_SINGLE_EXT("MAX9877 Shutdown Mode Switch",
			MAX9877_OUTPUT_MODE, 7, 1, 1,
			max9877_get_reg, max9877_set_reg),
	SOC_ENUM_EXT("MAX9877 Output Mode", max9877_enum[0],
			max9877_get_out_mode, max9877_set_out_mode),
	SOC_ENUM_EXT("MAX9877 Oscillator Mode", max9877_enum[1],
			max9877_get_osc_mode, max9877_set_osc_mode),
};

/* This function is called from ASoC machine driver */
int max9877_add_controls(struct snd_soc_codec *codec)
{
	return snd_soc_add_codec_controls(codec, max9877_controls,
			ARRAY_SIZE(max9877_controls));
}
EXPORT_SYMBOL_GPL(max9877_add_controls);

static const struct regmap_config max9877_regmap = {
	.reg_bits = 8,
	.val_bits = 8,

	.reg_defaults = max9877_regs,
	.num_reg_defaults = ARRAY_SIZE(max9877_regs),
	.cache_type = REGCACHE_RBTREE,
};

static int max9877_i2c_probe(struct i2c_client *client,
			     const struct i2c_device_id *id)
{
	int i;

	regmap = devm_regmap_init_i2c(client, &max9877_regmap);
	if (IS_ERR(regmap))
		return PTR_ERR(regmap);

	/* Ensure the device is in reset state */
	for (i = 0; i < ARRAY_SIZE(max9877_regs); i++)
		regmap_write(regmap, max9877_regs[i].reg, max9877_regs[i].def);

	return 0;
}

static int max9877_i2c_remove(struct i2c_client *client)
{
	regmap = NULL;

	return 0;
}

static const struct i2c_device_id max9877_i2c_id[] = {
	{ "max9877", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, max9877_i2c_id);

static struct i2c_driver max9877_i2c_driver = {
	.driver = {
		.name = "max9877",
		.owner = THIS_MODULE,
	},
	.probe = max9877_i2c_probe,
	.remove = max9877_i2c_remove,
	.id_table = max9877_i2c_id,
};

module_i2c_driver(max9877_i2c_driver);

MODULE_DESCRIPTION("ASoC MAX9877 amp driver");
MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
MODULE_LICENSE("GPL");