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/*
* 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 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(MAX9877_OUTPUT_MODE, 0, ARRAY_SIZE(max9877_out_mode),
max9877_out_mode),
SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, MAX9877_OSC_OFFSET,
ARRAY_SIZE(max9877_osc_mode), max9877_osc_mode),
};
static const struct snd_kcontrol_new max9877_controls[] = {
SOC_SINGLE_TLV("MAX9877 PGAINA Playback Volume",
MAX9877_INPUT_MODE, 0, 2, 0, max9877_pgain_tlv),
SOC_SINGLE_TLV("MAX9877 PGAINB Playback Volume",
MAX9877_INPUT_MODE, 2, 2, 0, max9877_pgain_tlv),
SOC_SINGLE_TLV("MAX9877 Amp Speaker Playback Volume",
MAX9877_SPK_VOLUME, 0, 31, 0, max9877_output_tlv),
SOC_DOUBLE_R_TLV("MAX9877 Amp HP Playback Volume",
MAX9877_HPL_VOLUME, MAX9877_HPR_VOLUME, 0, 31, 0,
max9877_output_tlv),
SOC_SINGLE("MAX9877 INB Stereo Switch",
MAX9877_INPUT_MODE, 4, 1, 1),
SOC_SINGLE("MAX9877 INA Stereo Switch",
MAX9877_INPUT_MODE, 5, 1, 1),
SOC_SINGLE("MAX9877 Zero-crossing detection Switch",
MAX9877_INPUT_MODE, 6, 1, 0),
SOC_SINGLE("MAX9877 Bypass Mode Switch",
MAX9877_OUTPUT_MODE, 6, 1, 0),
SOC_SINGLE("MAX9877 Shutdown Mode Switch",
MAX9877_OUTPUT_MODE, 7, 1, 1),
SOC_ENUM("MAX9877 Output Mode", max9877_enum[0]),
SOC_ENUM("MAX9877 Oscillator Mode", max9877_enum[1]),
};
static const struct snd_soc_codec_driver max9877_codec = {
.controls = max9877_controls,
.num_controls = ARRAY_SIZE(max9877_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 snd_soc_register_codec(&client->dev, &max9877_codec, NULL, 0);
}
static int max9877_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
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");
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