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149 lines
3.7 KiB
149 lines
3.7 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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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* [email protected] |
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* Copyright 2011 Lars-Peter Clausen <[email protected]> |
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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 const 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 <[email protected]>"); |
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MODULE_DESCRIPTION("LM4857 amplifier driver"); |
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MODULE_LICENSE("GPL");
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