soc/codecs/lm4857.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * LM4857 AMP driver
0004  *
0005  * Copyright 2007 Wolfson Microelectronics PLC.
0006  * Author: Graeme Gregory
0007  *         graeme.gregory@wolfsonmicro.com
0008  * Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
0009  */
0010
0011 #include <linux/init.h>
0012 #include <linux/module.h>
0013 #include <linux/i2c.h>
0014 #include <linux/regmap.h>
0015 #include <linux/slab.h>
0016
0017 #include <sound/core.h>
0018 #include <sound/soc.h>
0019 #include <sound/tlv.h>
0020
0021 static const struct reg_default lm4857_default_regs[] = {
0022     { 0x0, 0x00 },
0023     { 0x1, 0x00 },
0024     { 0x2, 0x00 },
0025     { 0x3, 0x00 },
0026 };
0027
0028 /* The register offsets in the cache array */
0029 #define LM4857_MVOL 0
0030 #define LM4857_LVOL 1
0031 #define LM4857_RVOL 2
0032 #define LM4857_CTRL 3
0033
0034 /* the shifts required to set these bits */
0035 #define LM4857_3D 5
0036 #define LM4857_WAKEUP 5
0037 #define LM4857_EPGAIN 4
0038
0039 static const unsigned int lm4857_mode_values[] = {
0040     0,
0041     6,
0042     7,
0043     8,
0044     9,
0045 };
0046
0047 static const char * const lm4857_mode_texts[] = {
0048     "Off",
0049     "Earpiece",
0050     "Loudspeaker",
0051     "Loudspeaker + Headphone",
0052     "Headphone",
0053 };
0054
0055 static SOC_VALUE_ENUM_SINGLE_AUTODISABLE_DECL(lm4857_mode_enum,
0056     LM4857_CTRL, 0, 0xf, lm4857_mode_texts, lm4857_mode_values);
0057
0058 static const struct snd_kcontrol_new lm4857_mode_ctrl =
0059     SOC_DAPM_ENUM("Mode", lm4857_mode_enum);
0060
0061 static const struct snd_soc_dapm_widget lm4857_dapm_widgets[] = {
0062     SND_SOC_DAPM_INPUT("IN"),
0063
0064     SND_SOC_DAPM_DEMUX("Mode", SND_SOC_NOPM, 0, 0, &lm4857_mode_ctrl),
0065
0066     SND_SOC_DAPM_OUTPUT("LS"),
0067     SND_SOC_DAPM_OUTPUT("HP"),
0068     SND_SOC_DAPM_OUTPUT("EP"),
0069 };
0070
0071 static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);
0072 static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);
0073
0074 static const struct snd_kcontrol_new lm4857_controls[] = {
0075     SOC_SINGLE_TLV("Left Playback Volume", LM4857_LVOL, 0, 31, 0,
0076         stereo_tlv),
0077     SOC_SINGLE_TLV("Right Playback Volume", LM4857_RVOL, 0, 31, 0,
0078         stereo_tlv),
0079     SOC_SINGLE_TLV("Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
0080         mono_tlv),
0081     SOC_SINGLE("Spk 3D Playback Switch", LM4857_LVOL, LM4857_3D, 1, 0),
0082     SOC_SINGLE("HP 3D Playback Switch", LM4857_RVOL, LM4857_3D, 1, 0),
0083     SOC_SINGLE("Fast Wakeup Playback Switch", LM4857_CTRL,
0084         LM4857_WAKEUP, 1, 0),
0085     SOC_SINGLE("Earpiece 6dB Playback Switch", LM4857_CTRL,
0086         LM4857_EPGAIN, 1, 0),
0087 };
0088
0089 static const struct snd_soc_dapm_route lm4857_routes[] = {
0090     { "Mode", NULL, "IN" },
0091     { "LS", "Loudspeaker", "Mode" },
0092     { "LS", "Loudspeaker + Headphone", "Mode" },
0093     { "HP", "Headphone", "Mode" },
0094     { "HP", "Loudspeaker + Headphone", "Mode" },
0095     { "EP", "Earpiece", "Mode" },
0096 };
0097
0098 static const struct snd_soc_component_driver lm4857_component_driver = {
0099     .controls = lm4857_controls,
0100     .num_controls = ARRAY_SIZE(lm4857_controls),
0101     .dapm_widgets = lm4857_dapm_widgets,
0102     .num_dapm_widgets = ARRAY_SIZE(lm4857_dapm_widgets),
0103     .dapm_routes = lm4857_routes,
0104     .num_dapm_routes = ARRAY_SIZE(lm4857_routes),
0105 };
0106
0107 static const struct regmap_config lm4857_regmap_config = {
0108     .val_bits = 6,
0109     .reg_bits = 2,
0110
0111     .max_register = LM4857_CTRL,
0112
0113     .cache_type = REGCACHE_FLAT,
0114     .reg_defaults = lm4857_default_regs,
0115     .num_reg_defaults = ARRAY_SIZE(lm4857_default_regs),
0116 };
0117
0118 static int lm4857_i2c_probe(struct i2c_client *i2c)
0119 {
0120     struct regmap *regmap;
0121
0122     regmap = devm_regmap_init_i2c(i2c, &lm4857_regmap_config);
0123     if (IS_ERR(regmap))
0124         return PTR_ERR(regmap);
0125
0126     return devm_snd_soc_register_component(&i2c->dev,
0127         &lm4857_component_driver, NULL, 0);
0128 }
0129
0130 static const struct i2c_device_id lm4857_i2c_id[] = {
0131     { "lm4857", 0 },
0132     { }
0133 };
0134 MODULE_DEVICE_TABLE(i2c, lm4857_i2c_id);
0135
0136 static struct i2c_driver lm4857_i2c_driver = {
0137     .driver = {
0138         .name = "lm4857",
0139     },
0140     .probe_new = lm4857_i2c_probe,
0141     .id_table = lm4857_i2c_id,
0142 };
0143
0144 module_i2c_driver(lm4857_i2c_driver);
0145
0146 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
0147 MODULE_DESCRIPTION("LM4857 amplifier driver");
0148 MODULE_LICENSE("GPL");