sound/soc/codecs/max9768.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * MAX9768 AMP driver
   4  *
   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.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 0
  22 #define MAX9768_CTRL 3
  23
  24 /* Commands */
  25 #define MAX9768_CTRL_PWM 0x15
  26 #define MAX9768_CTRL_FILTERLESS 0x16
  27
  28 struct max9768 {
  29         struct regmap *regmap;
  30         int mute_gpio;
  31         int shdn_gpio;
  32         u32 flags;
  33 };
  34
  35 static const struct reg_default max9768_default_regs[] = {
  36         { 0, 0 },
  37         { 3,  MAX9768_CTRL_FILTERLESS},
  38 };
  39
  40 static 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 = gpio_get_value_cansleep(max9768->mute_gpio);
  46
  47         ucontrol->value.integer.value[0] = !val;
  48
  49         return 0;
  50 }
  51
  52 static 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
  58         gpio_set_value_cansleep(max9768->mute_gpio, !ucontrol->value.integer.value[0]);
  59
  60         return 0;
  61 }
  62
  63 static const DECLARE_TLV_DB_RANGE(volume_tlv,
  64         0, 0, TLV_DB_SCALE_ITEM(-16150, 0, 0),
  65         1, 1, TLV_DB_SCALE_ITEM(-9280, 0, 0),
  66         2, 2, TLV_DB_SCALE_ITEM(-9030, 0, 0),
  67         3, 3, TLV_DB_SCALE_ITEM(-8680, 0, 0),
  68         4, 4, TLV_DB_SCALE_ITEM(-8430, 0, 0),
  69         5, 5, TLV_DB_SCALE_ITEM(-8080, 0, 0),
  70         6, 6, TLV_DB_SCALE_ITEM(-7830, 0, 0),
  71         7, 7, TLV_DB_SCALE_ITEM(-7470, 0, 0),
  72         8, 8, TLV_DB_SCALE_ITEM(-7220, 0, 0),
  73         9, 9, TLV_DB_SCALE_ITEM(-6870, 0, 0),
  74         10, 10, TLV_DB_SCALE_ITEM(-6620, 0, 0),
  75         11, 11, TLV_DB_SCALE_ITEM(-6270, 0, 0),
  76         12, 12, TLV_DB_SCALE_ITEM(-6020, 0, 0),
  77         13, 13, TLV_DB_SCALE_ITEM(-5670, 0, 0),
  78         14, 14, TLV_DB_SCALE_ITEM(-5420, 0, 0),
  79         15, 17, TLV_DB_SCALE_ITEM(-5060, 250, 0),
  80         18, 18, TLV_DB_SCALE_ITEM(-4370, 0, 0),
  81         19, 19, TLV_DB_SCALE_ITEM(-4210, 0, 0),
  82         20, 20, TLV_DB_SCALE_ITEM(-3960, 0, 0),
  83         21, 21, TLV_DB_SCALE_ITEM(-3760, 0, 0),
  84         22, 22, TLV_DB_SCALE_ITEM(-3600, 0, 0),
  85         23, 23, TLV_DB_SCALE_ITEM(-3340, 0, 0),
  86         24, 24, TLV_DB_SCALE_ITEM(-3150, 0, 0),
  87         25, 25, TLV_DB_SCALE_ITEM(-2980, 0, 0),
  88         26, 26, TLV_DB_SCALE_ITEM(-2720, 0, 0),
  89         27, 27, TLV_DB_SCALE_ITEM(-2520, 0, 0),
  90         28, 30, TLV_DB_SCALE_ITEM(-2350, 190, 0),
  91         31, 31, TLV_DB_SCALE_ITEM(-1750, 0, 0),
  92         32, 34, TLV_DB_SCALE_ITEM(-1640, 100, 0),
  93         35, 37, TLV_DB_SCALE_ITEM(-1310, 110, 0),
  94         38, 39, TLV_DB_SCALE_ITEM(-990, 100, 0),
  95         40, 40, TLV_DB_SCALE_ITEM(-710, 0, 0),
  96         41, 41, TLV_DB_SCALE_ITEM(-600, 0, 0),
  97         42, 42, TLV_DB_SCALE_ITEM(-500, 0, 0),
  98         43, 43, TLV_DB_SCALE_ITEM(-340, 0, 0),
  99         44, 44, TLV_DB_SCALE_ITEM(-190, 0, 0),
 100         45, 45, TLV_DB_SCALE_ITEM(-50, 0, 0),
 101         46, 46, TLV_DB_SCALE_ITEM(50, 0, 0),
 102         47, 50, TLV_DB_SCALE_ITEM(120, 40, 0),
 103         51, 57, TLV_DB_SCALE_ITEM(290, 50, 0),
 104         58, 58, TLV_DB_SCALE_ITEM(650, 0, 0),
 105         59, 62, TLV_DB_SCALE_ITEM(700, 60, 0),
 106         63, 63, TLV_DB_SCALE_ITEM(950, 0, 0)
 107 );
 108
 109 static const struct snd_kcontrol_new max9768_volume[] = {
 110         SOC_SINGLE_TLV("Playback Volume", MAX9768_VOL, 0, 63, 0, volume_tlv),
 111 };
 112
 113 static const struct snd_kcontrol_new max9768_mute[] = {
 114         SOC_SINGLE_BOOL_EXT("Playback Switch", 0, max9768_get_gpio, max9768_set_gpio),
 115 };
 116
 117 static const struct snd_soc_dapm_widget max9768_dapm_widgets[] = {
 118 SND_SOC_DAPM_INPUT("IN"),
 119
 120 SND_SOC_DAPM_OUTPUT("OUT+"),
 121 SND_SOC_DAPM_OUTPUT("OUT-"),
 122 };
 123
 124 static const struct snd_soc_dapm_route max9768_dapm_routes[] = {
 125         { "OUT+", NULL, "IN" },
 126         { "OUT-", NULL, "IN" },
 127 };
 128
 129 static int max9768_probe(struct snd_soc_component *component)
 130 {
 131         struct max9768 *max9768 = snd_soc_component_get_drvdata(component);
 132         int ret;
 133
 134         if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) {
 135                 ret = regmap_write(max9768->regmap, MAX9768_CTRL,
 136                         MAX9768_CTRL_PWM);
 137                 if (ret)
 138                         return ret;
 139         }
 140
 141         if (gpio_is_valid(max9768->mute_gpio)) {
 142                 ret = snd_soc_add_component_controls(component, max9768_mute,
 143                                 ARRAY_SIZE(max9768_mute));
 144                 if (ret)
 145                         return ret;
 146         }
 147
 148         return 0;
 149 }
 150
 151 static const struct snd_soc_component_driver max9768_component_driver = {
 152         .probe = max9768_probe,
 153         .controls = max9768_volume,
 154         .num_controls = ARRAY_SIZE(max9768_volume),
 155         .dapm_widgets = max9768_dapm_widgets,
 156         .num_dapm_widgets = ARRAY_SIZE(max9768_dapm_widgets),
 157         .dapm_routes = max9768_dapm_routes,
 158         .num_dapm_routes = ARRAY_SIZE(max9768_dapm_routes),
 159 };
 160
 161 static const struct regmap_config max9768_i2c_regmap_config = {
 162         .reg_bits = 2,
 163         .val_bits = 6,
 164         .max_register = 3,
 165         .reg_defaults = max9768_default_regs,
 166         .num_reg_defaults = ARRAY_SIZE(max9768_default_regs),
 167         .cache_type = REGCACHE_RBTREE,
 168 };
 169
 170 static int max9768_i2c_probe(struct i2c_client *client,
 171                              const struct i2c_device_id *id)
 172 {
 173         struct max9768 *max9768;
 174         struct max9768_pdata *pdata = client->dev.platform_data;
 175         int err;
 176
 177         max9768 = devm_kzalloc(&client->dev, sizeof(*max9768), GFP_KERNEL);
 178         if (!max9768)
 179                 return -ENOMEM;
 180
 181         if (pdata) {
 182                 /* Mute on powerup to avoid clicks */
 183                 err = devm_gpio_request_one(&client->dev, pdata->mute_gpio,
 184                                 GPIOF_INIT_HIGH, "MAX9768 Mute");
 185                 max9768->mute_gpio = err ?: pdata->mute_gpio;
 186
 187                 /* Activate chip by releasing shutdown, enables I2C */
 188                 err = devm_gpio_request_one(&client->dev, pdata->shdn_gpio,
 189                                 GPIOF_INIT_HIGH, "MAX9768 Shutdown");
 190                 max9768->shdn_gpio = err ?: pdata->shdn_gpio;
 191
 192                 max9768->flags = pdata->flags;
 193         } else {
 194                 max9768->shdn_gpio = -EINVAL;
 195                 max9768->mute_gpio = -EINVAL;
 196         }
 197
 198         i2c_set_clientdata(client, max9768);
 199
 200         max9768->regmap = devm_regmap_init_i2c(client, &max9768_i2c_regmap_config);
 201         if (IS_ERR(max9768->regmap))
 202                 return PTR_ERR(max9768->regmap);
 203
 204         return devm_snd_soc_register_component(&client->dev,
 205                 &max9768_component_driver, NULL, 0);
 206 }
 207
 208 static const struct i2c_device_id max9768_i2c_id[] = {
 209         { "max9768", 0 },
 210         { }
 211 };
 212 MODULE_DEVICE_TABLE(i2c, max9768_i2c_id);
 213
 214 static struct i2c_driver max9768_i2c_driver = {
 215         .driver = {
 216                 .name = "max9768",
 217         },
 218         .probe = max9768_i2c_probe,
 219         .id_table = max9768_i2c_id,
 220 };
 221 module_i2c_driver(max9768_i2c_driver);
 222
 223 MODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>");
 224 MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver");
 225 MODULE_LICENSE("GPL v2");