LXR linux/sound/soc/codecs/lm4857.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * LM4857 AMP driver
   4 *
   5 * Copyright 2007 Wolfson Microelectronics PLC.
   6 * Author: Graeme Gregory
   7 *         graeme.gregory@wolfsonmicro.com
   8 * Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
   9 */
  10
  11#include <linux/init.h>
  12#include <linux/module.h>
  13#include <linux/i2c.h>
  14#include <linux/regmap.h>
  15#include <linux/slab.h>
  16
  17#include <sound/core.h>
  18#include <sound/soc.h>
  19#include <sound/tlv.h>
  20
  21static const struct reg_default lm4857_default_regs[] = {
  22        { 0x0, 0x00 },
  23        { 0x1, 0x00 },
  24        { 0x2, 0x00 },
  25        { 0x3, 0x00 },
  26};
  27
  28/* The register offsets in the cache array */
  29#define LM4857_MVOL 0
  30#define LM4857_LVOL 1
  31#define LM4857_RVOL 2
  32#define LM4857_CTRL 3
  33
  34/* the shifts required to set these bits */
  35#define LM4857_3D 5
  36#define LM4857_WAKEUP 5
  37#define LM4857_EPGAIN 4
  38
  39static const unsigned int lm4857_mode_values[] = {
  40        0,
  41        6,
  42        7,
  43        8,
  44        9,
  45};
  46
  47static const char * const lm4857_mode_texts[] = {
  48        "Off",
  49        "Earpiece",
  50        "Loudspeaker",
  51        "Loudspeaker + Headphone",
  52        "Headphone",
  53};
  54
  55static SOC_VALUE_ENUM_SINGLE_AUTODISABLE_DECL(lm4857_mode_enum,
  56        LM4857_CTRL, 0, 0xf, lm4857_mode_texts, lm4857_mode_values);
  57
  58static const struct snd_kcontrol_new lm4857_mode_ctrl =
  59        SOC_DAPM_ENUM("Mode", lm4857_mode_enum);
  60
  61static const struct snd_soc_dapm_widget lm4857_dapm_widgets[] = {
  62        SND_SOC_DAPM_INPUT("IN"),
  63
  64        SND_SOC_DAPM_DEMUX("Mode", SND_SOC_NOPM, 0, 0, &lm4857_mode_ctrl),
  65
  66        SND_SOC_DAPM_OUTPUT("LS"),
  67        SND_SOC_DAPM_OUTPUT("HP"),
  68        SND_SOC_DAPM_OUTPUT("EP"),
  69};
  70
  71static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);
  72static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);
  73
  74static const struct snd_kcontrol_new lm4857_controls[] = {
  75        SOC_SINGLE_TLV("Left Playback Volume", LM4857_LVOL, 0, 31, 0,
  76                stereo_tlv),
  77        SOC_SINGLE_TLV("Right Playback Volume", LM4857_RVOL, 0, 31, 0,
  78                stereo_tlv),
  79        SOC_SINGLE_TLV("Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
  80                mono_tlv),
  81        SOC_SINGLE("Spk 3D Playback Switch", LM4857_LVOL, LM4857_3D, 1, 0),
  82        SOC_SINGLE("HP 3D Playback Switch", LM4857_RVOL, LM4857_3D, 1, 0),
  83        SOC_SINGLE("Fast Wakeup Playback Switch", LM4857_CTRL,
  84                LM4857_WAKEUP, 1, 0),
  85        SOC_SINGLE("Earpiece 6dB Playback Switch", LM4857_CTRL,
  86                LM4857_EPGAIN, 1, 0),
  87};
  88
  89static const struct snd_soc_dapm_route lm4857_routes[] = {
  90        { "Mode", NULL, "IN" },
  91        { "LS", "Loudspeaker", "Mode" },
  92        { "LS", "Loudspeaker + Headphone", "Mode" },
  93        { "HP", "Headphone", "Mode" },
  94        { "HP", "Loudspeaker + Headphone", "Mode" },
  95        { "EP", "Earpiece", "Mode" },
  96};
  97
  98static const struct snd_soc_component_driver lm4857_component_driver = {
  99        .controls = lm4857_controls,
 100        .num_controls = ARRAY_SIZE(lm4857_controls),
 101        .dapm_widgets = lm4857_dapm_widgets,
 102        .num_dapm_widgets = ARRAY_SIZE(lm4857_dapm_widgets),
 103        .dapm_routes = lm4857_routes,
 104        .num_dapm_routes = ARRAY_SIZE(lm4857_routes),
 105};
 106
 107static const struct regmap_config lm4857_regmap_config = {
 108        .val_bits = 6,
 109        .reg_bits = 2,
 110
 111        .max_register = LM4857_CTRL,
 112
 113        .cache_type = REGCACHE_FLAT,
 114        .reg_defaults = lm4857_default_regs,
 115        .num_reg_defaults = ARRAY_SIZE(lm4857_default_regs),
 116};
 117
 118static int lm4857_i2c_probe(struct i2c_client *i2c,
 119                            const struct i2c_device_id *id)
 120{
 121        struct regmap *regmap;
 122
 123        regmap = devm_regmap_init_i2c(i2c, &lm4857_regmap_config);
 124        if (IS_ERR(regmap))
 125                return PTR_ERR(regmap);
 126
 127        return devm_snd_soc_register_component(&i2c->dev,
 128                &lm4857_component_driver, NULL, 0);
 129}
 130
 131static const struct i2c_device_id lm4857_i2c_id[] = {
 132        { "lm4857", 0 },
 133        { }
 134};
 135MODULE_DEVICE_TABLE(i2c, lm4857_i2c_id);
 136
 137static struct i2c_driver lm4857_i2c_driver = {
 138        .driver = {
 139                .name = "lm4857",
 140        },
 141        .probe = lm4857_i2c_probe,
 142        .id_table = lm4857_i2c_id,
 143};
 144
 145module_i2c_driver(lm4857_i2c_driver);
 146
 147MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 148MODULE_DESCRIPTION("LM4857 amplifier driver");
 149MODULE_LICENSE("GPL");
 150