forked from Minki/linux
154 lines
4.0 KiB
C
154 lines
4.0 KiB
C
/*
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* max9877.c -- amp driver for max9877
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*
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* Copyright (C) 2009 Samsung Electronics Co.Ltd
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* Author: Joonyoung Shim <jy0922.shim@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/regmap.h>
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#include <sound/soc.h>
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#include <sound/tlv.h>
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#include "max9877.h"
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static struct regmap *regmap;
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static struct reg_default max9877_regs[] = {
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{ 0, 0x40 },
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{ 1, 0x00 },
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{ 2, 0x00 },
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{ 3, 0x00 },
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{ 4, 0x49 },
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};
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static const unsigned int max9877_pgain_tlv[] = {
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TLV_DB_RANGE_HEAD(2),
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0, 1, TLV_DB_SCALE_ITEM(0, 900, 0),
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2, 2, TLV_DB_SCALE_ITEM(2000, 0, 0),
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};
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static const unsigned int max9877_output_tlv[] = {
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TLV_DB_RANGE_HEAD(4),
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0, 7, TLV_DB_SCALE_ITEM(-7900, 400, 1),
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8, 15, TLV_DB_SCALE_ITEM(-4700, 300, 0),
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16, 23, TLV_DB_SCALE_ITEM(-2300, 200, 0),
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24, 31, TLV_DB_SCALE_ITEM(-700, 100, 0),
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};
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static const char *max9877_out_mode[] = {
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"INA -> SPK",
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"INA -> HP",
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"INA -> SPK and HP",
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"INB -> SPK",
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"INB -> HP",
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"INB -> SPK and HP",
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"INA + INB -> SPK",
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"INA + INB -> HP",
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"INA + INB -> SPK and HP",
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};
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static const char *max9877_osc_mode[] = {
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"1176KHz",
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"1100KHz",
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"700KHz",
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};
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static const struct soc_enum max9877_enum[] = {
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SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, 0, ARRAY_SIZE(max9877_out_mode),
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max9877_out_mode),
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SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, MAX9877_OSC_OFFSET,
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ARRAY_SIZE(max9877_osc_mode), max9877_osc_mode),
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};
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static const struct snd_kcontrol_new max9877_controls[] = {
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SOC_SINGLE_TLV("MAX9877 PGAINA Playback Volume",
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MAX9877_INPUT_MODE, 0, 2, 0, max9877_pgain_tlv),
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SOC_SINGLE_TLV("MAX9877 PGAINB Playback Volume",
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MAX9877_INPUT_MODE, 2, 2, 0, max9877_pgain_tlv),
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SOC_SINGLE_TLV("MAX9877 Amp Speaker Playback Volume",
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MAX9877_SPK_VOLUME, 0, 31, 0, max9877_output_tlv),
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SOC_DOUBLE_R_TLV("MAX9877 Amp HP Playback Volume",
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MAX9877_HPL_VOLUME, MAX9877_HPR_VOLUME, 0, 31, 0,
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max9877_output_tlv),
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SOC_SINGLE("MAX9877 INB Stereo Switch",
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MAX9877_INPUT_MODE, 4, 1, 1),
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SOC_SINGLE("MAX9877 INA Stereo Switch",
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MAX9877_INPUT_MODE, 5, 1, 1),
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SOC_SINGLE("MAX9877 Zero-crossing detection Switch",
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MAX9877_INPUT_MODE, 6, 1, 0),
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SOC_SINGLE("MAX9877 Bypass Mode Switch",
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MAX9877_OUTPUT_MODE, 6, 1, 0),
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SOC_SINGLE("MAX9877 Shutdown Mode Switch",
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MAX9877_OUTPUT_MODE, 7, 1, 1),
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SOC_ENUM("MAX9877 Output Mode", max9877_enum[0]),
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SOC_ENUM("MAX9877 Oscillator Mode", max9877_enum[1]),
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};
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static const struct snd_soc_codec_driver max9877_codec = {
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.controls = max9877_controls,
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.num_controls = ARRAY_SIZE(max9877_controls),
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};
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static const struct regmap_config max9877_regmap = {
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.reg_bits = 8,
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.val_bits = 8,
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.reg_defaults = max9877_regs,
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.num_reg_defaults = ARRAY_SIZE(max9877_regs),
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.cache_type = REGCACHE_RBTREE,
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};
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static int max9877_i2c_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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int i;
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regmap = devm_regmap_init_i2c(client, &max9877_regmap);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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/* Ensure the device is in reset state */
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for (i = 0; i < ARRAY_SIZE(max9877_regs); i++)
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regmap_write(regmap, max9877_regs[i].reg, max9877_regs[i].def);
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return snd_soc_register_codec(&client->dev, &max9877_codec, NULL, 0);
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}
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static int max9877_i2c_remove(struct i2c_client *client)
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{
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snd_soc_unregister_codec(&client->dev);
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return 0;
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}
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static const struct i2c_device_id max9877_i2c_id[] = {
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{ "max9877", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, max9877_i2c_id);
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static struct i2c_driver max9877_i2c_driver = {
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.driver = {
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.name = "max9877",
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.owner = THIS_MODULE,
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},
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.probe = max9877_i2c_probe,
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.remove = max9877_i2c_remove,
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.id_table = max9877_i2c_id,
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};
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module_i2c_driver(max9877_i2c_driver);
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MODULE_DESCRIPTION("ASoC MAX9877 amp driver");
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MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
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MODULE_LICENSE("GPL");
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