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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * MAX9768 AMP driver4 *5 * Copyright (C) 2011, 2012 by Wolfram Sang, Pengutronix e.K.6 */7 8#include <linux/init.h>9#include <linux/module.h>10#include <linux/i2c.h>11#include <linux/slab.h>12#include <linux/gpio/consumer.h>13#include <linux/regmap.h>14 15#include <sound/core.h>16#include <sound/soc.h>17#include <sound/tlv.h>18#include <sound/max9768.h>19 20/* "Registers" */21#define MAX9768_VOL 022#define MAX9768_CTRL 323 24/* Commands */25#define MAX9768_CTRL_PWM 0x1526#define MAX9768_CTRL_FILTERLESS 0x1627 28struct max9768 {29 struct regmap *regmap;30 struct gpio_desc *mute;31 struct gpio_desc *shdn;32 u32 flags;33};34 35static const struct reg_default max9768_default_regs[] = {36 { 0, 0 },37 { 3, MAX9768_CTRL_FILTERLESS},38};39 40static int max9768_get_gpio(struct snd_kcontrol *kcontrol,41 struct snd_ctl_elem_value *ucontrol)42{43 struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);44 struct max9768 *max9768 = snd_soc_component_get_drvdata(c);45 int val = gpiod_get_value_cansleep(max9768->mute);46 47 ucontrol->value.integer.value[0] = !val;48 49 return 0;50}51 52static int max9768_set_gpio(struct snd_kcontrol *kcontrol,53 struct snd_ctl_elem_value *ucontrol)54{55 struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);56 struct max9768 *max9768 = snd_soc_component_get_drvdata(c);57 bool val = !ucontrol->value.integer.value[0];58 int ret;59 60 if (val != gpiod_get_value_cansleep(max9768->mute))61 ret = 1;62 else63 ret = 0;64 65 gpiod_set_value_cansleep(max9768->mute, val);66 67 return ret;68}69 70static const DECLARE_TLV_DB_RANGE(volume_tlv,71 0, 0, TLV_DB_SCALE_ITEM(-16150, 0, 0),72 1, 1, TLV_DB_SCALE_ITEM(-9280, 0, 0),73 2, 2, TLV_DB_SCALE_ITEM(-9030, 0, 0),74 3, 3, TLV_DB_SCALE_ITEM(-8680, 0, 0),75 4, 4, TLV_DB_SCALE_ITEM(-8430, 0, 0),76 5, 5, TLV_DB_SCALE_ITEM(-8080, 0, 0),77 6, 6, TLV_DB_SCALE_ITEM(-7830, 0, 0),78 7, 7, TLV_DB_SCALE_ITEM(-7470, 0, 0),79 8, 8, TLV_DB_SCALE_ITEM(-7220, 0, 0),80 9, 9, TLV_DB_SCALE_ITEM(-6870, 0, 0),81 10, 10, TLV_DB_SCALE_ITEM(-6620, 0, 0),82 11, 11, TLV_DB_SCALE_ITEM(-6270, 0, 0),83 12, 12, TLV_DB_SCALE_ITEM(-6020, 0, 0),84 13, 13, TLV_DB_SCALE_ITEM(-5670, 0, 0),85 14, 14, TLV_DB_SCALE_ITEM(-5420, 0, 0),86 15, 17, TLV_DB_SCALE_ITEM(-5060, 250, 0),87 18, 18, TLV_DB_SCALE_ITEM(-4370, 0, 0),88 19, 19, TLV_DB_SCALE_ITEM(-4210, 0, 0),89 20, 20, TLV_DB_SCALE_ITEM(-3960, 0, 0),90 21, 21, TLV_DB_SCALE_ITEM(-3760, 0, 0),91 22, 22, TLV_DB_SCALE_ITEM(-3600, 0, 0),92 23, 23, TLV_DB_SCALE_ITEM(-3340, 0, 0),93 24, 24, TLV_DB_SCALE_ITEM(-3150, 0, 0),94 25, 25, TLV_DB_SCALE_ITEM(-2980, 0, 0),95 26, 26, TLV_DB_SCALE_ITEM(-2720, 0, 0),96 27, 27, TLV_DB_SCALE_ITEM(-2520, 0, 0),97 28, 30, TLV_DB_SCALE_ITEM(-2350, 190, 0),98 31, 31, TLV_DB_SCALE_ITEM(-1750, 0, 0),99 32, 34, TLV_DB_SCALE_ITEM(-1640, 100, 0),100 35, 37, TLV_DB_SCALE_ITEM(-1310, 110, 0),101 38, 39, TLV_DB_SCALE_ITEM(-990, 100, 0),102 40, 40, TLV_DB_SCALE_ITEM(-710, 0, 0),103 41, 41, TLV_DB_SCALE_ITEM(-600, 0, 0),104 42, 42, TLV_DB_SCALE_ITEM(-500, 0, 0),105 43, 43, TLV_DB_SCALE_ITEM(-340, 0, 0),106 44, 44, TLV_DB_SCALE_ITEM(-190, 0, 0),107 45, 45, TLV_DB_SCALE_ITEM(-50, 0, 0),108 46, 46, TLV_DB_SCALE_ITEM(50, 0, 0),109 47, 50, TLV_DB_SCALE_ITEM(120, 40, 0),110 51, 57, TLV_DB_SCALE_ITEM(290, 50, 0),111 58, 58, TLV_DB_SCALE_ITEM(650, 0, 0),112 59, 62, TLV_DB_SCALE_ITEM(700, 60, 0),113 63, 63, TLV_DB_SCALE_ITEM(950, 0, 0)114);115 116static const struct snd_kcontrol_new max9768_volume[] = {117 SOC_SINGLE_TLV("Playback Volume", MAX9768_VOL, 0, 63, 0, volume_tlv),118};119 120static const struct snd_kcontrol_new max9768_mute[] = {121 SOC_SINGLE_BOOL_EXT("Playback Switch", 0, max9768_get_gpio, max9768_set_gpio),122};123 124static const struct snd_soc_dapm_widget max9768_dapm_widgets[] = {125SND_SOC_DAPM_INPUT("IN"),126 127SND_SOC_DAPM_OUTPUT("OUT+"),128SND_SOC_DAPM_OUTPUT("OUT-"),129};130 131static const struct snd_soc_dapm_route max9768_dapm_routes[] = {132 { "OUT+", NULL, "IN" },133 { "OUT-", NULL, "IN" },134};135 136static int max9768_probe(struct snd_soc_component *component)137{138 struct max9768 *max9768 = snd_soc_component_get_drvdata(component);139 int ret;140 141 if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) {142 ret = regmap_write(max9768->regmap, MAX9768_CTRL,143 MAX9768_CTRL_PWM);144 if (ret)145 return ret;146 }147 148 if (max9768->mute) {149 ret = snd_soc_add_component_controls(component, max9768_mute,150 ARRAY_SIZE(max9768_mute));151 if (ret)152 return ret;153 }154 155 return 0;156}157 158static const struct snd_soc_component_driver max9768_component_driver = {159 .probe = max9768_probe,160 .controls = max9768_volume,161 .num_controls = ARRAY_SIZE(max9768_volume),162 .dapm_widgets = max9768_dapm_widgets,163 .num_dapm_widgets = ARRAY_SIZE(max9768_dapm_widgets),164 .dapm_routes = max9768_dapm_routes,165 .num_dapm_routes = ARRAY_SIZE(max9768_dapm_routes),166};167 168static const struct regmap_config max9768_i2c_regmap_config = {169 .reg_bits = 2,170 .val_bits = 6,171 .max_register = 3,172 .reg_defaults = max9768_default_regs,173 .num_reg_defaults = ARRAY_SIZE(max9768_default_regs),174 .cache_type = REGCACHE_RBTREE,175};176 177static int max9768_i2c_probe(struct i2c_client *client)178{179 struct max9768 *max9768;180 struct max9768_pdata *pdata = client->dev.platform_data;181 182 max9768 = devm_kzalloc(&client->dev, sizeof(*max9768), GFP_KERNEL);183 if (!max9768)184 return -ENOMEM;185 186 /* Mute on powerup to avoid clicks */187 max9768->mute = devm_gpiod_get_optional(&client->dev,188 "mute",189 GPIOD_OUT_HIGH);190 if (IS_ERR(max9768->mute))191 return PTR_ERR(max9768->mute);192 gpiod_set_consumer_name(max9768->mute, "MAX9768 Mute");193 194 /* Activate chip by releasing shutdown, enables I2C */195 max9768->shdn = devm_gpiod_get_optional(&client->dev,196 "shutdown",197 GPIOD_OUT_HIGH);198 if (IS_ERR(max9768->shdn))199 return PTR_ERR(max9768->shdn);200 gpiod_set_consumer_name(max9768->shdn, "MAX9768 Shutdown");201 202 if (pdata)203 max9768->flags = pdata->flags;204 205 i2c_set_clientdata(client, max9768);206 207 max9768->regmap = devm_regmap_init_i2c(client, &max9768_i2c_regmap_config);208 if (IS_ERR(max9768->regmap))209 return PTR_ERR(max9768->regmap);210 211 return devm_snd_soc_register_component(&client->dev,212 &max9768_component_driver, NULL, 0);213}214 215static const struct i2c_device_id max9768_i2c_id[] = {216 { "max9768" },217 { }218};219MODULE_DEVICE_TABLE(i2c, max9768_i2c_id);220 221static struct i2c_driver max9768_i2c_driver = {222 .driver = {223 .name = "max9768",224 },225 .probe = max9768_i2c_probe,226 .id_table = max9768_i2c_id,227};228module_i2c_driver(max9768_i2c_driver);229 230MODULE_AUTHOR("Wolfram Sang <kernel@pengutronix.de>");231MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver");232MODULE_LICENSE("GPL v2");233