155 lines
3.9 KiB
C
155 lines
3.9 KiB
C
/*
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* LM4857 AMP driver
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*
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* Copyright 2007 Wolfson Microelectronics PLC.
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* Author: Graeme Gregory
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* graeme.gregory@wolfsonmicro.com
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* Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
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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/init.h>
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/soc.h>
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#include <sound/tlv.h>
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static const struct reg_default lm4857_default_regs[] = {
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{ 0x0, 0x00 },
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{ 0x1, 0x00 },
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{ 0x2, 0x00 },
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{ 0x3, 0x00 },
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};
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/* The register offsets in the cache array */
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#define LM4857_MVOL 0
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#define LM4857_LVOL 1
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#define LM4857_RVOL 2
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#define LM4857_CTRL 3
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/* the shifts required to set these bits */
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#define LM4857_3D 5
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#define LM4857_WAKEUP 5
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#define LM4857_EPGAIN 4
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static const unsigned int lm4857_mode_values[] = {
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0,
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6,
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7,
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8,
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9,
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};
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static const char * const lm4857_mode_texts[] = {
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"Off",
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"Earpiece",
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"Loudspeaker",
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"Loudspeaker + Headphone",
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"Headphone",
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};
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static SOC_VALUE_ENUM_SINGLE_AUTODISABLE_DECL(lm4857_mode_enum,
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LM4857_CTRL, 0, 0xf, lm4857_mode_texts, lm4857_mode_values);
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static const struct snd_kcontrol_new lm4857_mode_ctrl =
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SOC_DAPM_ENUM("Mode", lm4857_mode_enum);
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static const struct snd_soc_dapm_widget lm4857_dapm_widgets[] = {
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SND_SOC_DAPM_INPUT("IN"),
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SND_SOC_DAPM_DEMUX("Mode", SND_SOC_NOPM, 0, 0, &lm4857_mode_ctrl),
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SND_SOC_DAPM_OUTPUT("LS"),
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SND_SOC_DAPM_OUTPUT("HP"),
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SND_SOC_DAPM_OUTPUT("EP"),
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};
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static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);
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static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);
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static const struct snd_kcontrol_new lm4857_controls[] = {
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SOC_SINGLE_TLV("Left Playback Volume", LM4857_LVOL, 0, 31, 0,
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stereo_tlv),
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SOC_SINGLE_TLV("Right Playback Volume", LM4857_RVOL, 0, 31, 0,
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stereo_tlv),
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SOC_SINGLE_TLV("Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
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mono_tlv),
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SOC_SINGLE("Spk 3D Playback Switch", LM4857_LVOL, LM4857_3D, 1, 0),
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SOC_SINGLE("HP 3D Playback Switch", LM4857_RVOL, LM4857_3D, 1, 0),
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SOC_SINGLE("Fast Wakeup Playback Switch", LM4857_CTRL,
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LM4857_WAKEUP, 1, 0),
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SOC_SINGLE("Earpiece 6dB Playback Switch", LM4857_CTRL,
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LM4857_EPGAIN, 1, 0),
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};
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static const struct snd_soc_dapm_route lm4857_routes[] = {
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{ "Mode", NULL, "IN" },
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{ "LS", "Loudspeaker", "Mode" },
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{ "LS", "Loudspeaker + Headphone", "Mode" },
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{ "HP", "Headphone", "Mode" },
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{ "HP", "Loudspeaker + Headphone", "Mode" },
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{ "EP", "Earpiece", "Mode" },
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};
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static struct snd_soc_component_driver lm4857_component_driver = {
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.controls = lm4857_controls,
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.num_controls = ARRAY_SIZE(lm4857_controls),
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.dapm_widgets = lm4857_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(lm4857_dapm_widgets),
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.dapm_routes = lm4857_routes,
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.num_dapm_routes = ARRAY_SIZE(lm4857_routes),
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};
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static const struct regmap_config lm4857_regmap_config = {
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.val_bits = 6,
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.reg_bits = 2,
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.max_register = LM4857_CTRL,
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.cache_type = REGCACHE_FLAT,
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.reg_defaults = lm4857_default_regs,
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.num_reg_defaults = ARRAY_SIZE(lm4857_default_regs),
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};
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static int lm4857_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct regmap *regmap;
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regmap = devm_regmap_init_i2c(i2c, &lm4857_regmap_config);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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return devm_snd_soc_register_component(&i2c->dev,
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&lm4857_component_driver, NULL, 0);
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}
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static const struct i2c_device_id lm4857_i2c_id[] = {
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{ "lm4857", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, lm4857_i2c_id);
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static struct i2c_driver lm4857_i2c_driver = {
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.driver = {
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.name = "lm4857",
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},
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.probe = lm4857_i2c_probe,
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.id_table = lm4857_i2c_id,
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};
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module_i2c_driver(lm4857_i2c_driver);
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MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
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MODULE_DESCRIPTION("LM4857 amplifier driver");
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MODULE_LICENSE("GPL");
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