sound/soc/codecs/max9877.c

   1 /*
   2  * max9877.c  --  amp driver for max9877
   3  *
   4  * Copyright (C) 2009 Samsung Electronics Co.Ltd
   5  * Author: Joonyoung Shim <jy0922.shim@samsung.com>
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  *
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/init.h>
  16 #include <linux/i2c.h>
  17 #include <linux/regmap.h>
  18 #include <sound/soc.h>
  19 #include <sound/tlv.h>
  20
  21 #include "max9877.h"
  22
  23 static const struct reg_default max9877_regs[] = {
  24         { 0, 0x40 },
  25         { 1, 0x00 },
  26         { 2, 0x00 },
  27         { 3, 0x00 },
  28         { 4, 0x49 },
  29 };
  30
  31 static const DECLARE_TLV_DB_RANGE(max9877_pgain_tlv,
  32         0, 1, TLV_DB_SCALE_ITEM(0, 900, 0),
  33         2, 2, TLV_DB_SCALE_ITEM(2000, 0, 0)
  34 );
  35
  36 static const DECLARE_TLV_DB_RANGE(max9877_output_tlv,
  37         0, 7, TLV_DB_SCALE_ITEM(-7900, 400, 1),
  38         8, 15, TLV_DB_SCALE_ITEM(-4700, 300, 0),
  39         16, 23, TLV_DB_SCALE_ITEM(-2300, 200, 0),
  40         24, 31, TLV_DB_SCALE_ITEM(-700, 100, 0)
  41 );
  42
  43 static const char *max9877_out_mode[] = {
  44         "INA -> SPK",
  45         "INA -> HP",
  46         "INA -> SPK and HP",
  47         "INB -> SPK",
  48         "INB -> HP",
  49         "INB -> SPK and HP",
  50         "INA + INB -> SPK",
  51         "INA + INB -> HP",
  52         "INA + INB -> SPK and HP",
  53 };
  54
  55 static const char *max9877_osc_mode[] = {
  56         "1176KHz",
  57         "1100KHz",
  58         "700KHz",
  59 };
  60
  61 static const struct soc_enum max9877_enum[] = {
  62         SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, 0, ARRAY_SIZE(max9877_out_mode),
  63                         max9877_out_mode),
  64         SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, MAX9877_OSC_OFFSET,
  65                         ARRAY_SIZE(max9877_osc_mode), max9877_osc_mode),
  66 };
  67
  68 static const struct snd_kcontrol_new max9877_controls[] = {
  69         SOC_SINGLE_TLV("MAX9877 PGAINA Playback Volume",
  70                        MAX9877_INPUT_MODE, 0, 2, 0, max9877_pgain_tlv),
  71         SOC_SINGLE_TLV("MAX9877 PGAINB Playback Volume",
  72                        MAX9877_INPUT_MODE, 2, 2, 0, max9877_pgain_tlv),
  73         SOC_SINGLE_TLV("MAX9877 Amp Speaker Playback Volume",
  74                        MAX9877_SPK_VOLUME, 0, 31, 0, max9877_output_tlv),
  75         SOC_DOUBLE_R_TLV("MAX9877 Amp HP Playback Volume",
  76                          MAX9877_HPL_VOLUME, MAX9877_HPR_VOLUME, 0, 31, 0,
  77                          max9877_output_tlv),
  78         SOC_SINGLE("MAX9877 INB Stereo Switch",
  79                    MAX9877_INPUT_MODE, 4, 1, 1),
  80         SOC_SINGLE("MAX9877 INA Stereo Switch",
  81                    MAX9877_INPUT_MODE, 5, 1, 1),
  82         SOC_SINGLE("MAX9877 Zero-crossing detection Switch",
  83                    MAX9877_INPUT_MODE, 6, 1, 0),
  84         SOC_SINGLE("MAX9877 Bypass Mode Switch",
  85                    MAX9877_OUTPUT_MODE, 6, 1, 0),
  86         SOC_ENUM("MAX9877 Output Mode", max9877_enum[0]),
  87         SOC_ENUM("MAX9877 Oscillator Mode", max9877_enum[1]),
  88 };
  89
  90 static const struct snd_soc_dapm_widget max9877_dapm_widgets[] = {
  91 SND_SOC_DAPM_INPUT("INA1"),
  92 SND_SOC_DAPM_INPUT("INA2"),
  93 SND_SOC_DAPM_INPUT("INB1"),
  94 SND_SOC_DAPM_INPUT("INB2"),
  95 SND_SOC_DAPM_INPUT("RXIN+"),
  96 SND_SOC_DAPM_INPUT("RXIN-"),
  97
  98 SND_SOC_DAPM_PGA("SHDN", MAX9877_OUTPUT_MODE, 7, 1, NULL, 0),
  99
 100 SND_SOC_DAPM_OUTPUT("OUT+"),
 101 SND_SOC_DAPM_OUTPUT("OUT-"),
 102 SND_SOC_DAPM_OUTPUT("HPL"),
 103 SND_SOC_DAPM_OUTPUT("HPR"),
 104 };
 105
 106 static const struct snd_soc_dapm_route max9877_dapm_routes[] = {
 107         { "SHDN", NULL, "INA1" },
 108         { "SHDN", NULL, "INA2" },
 109         { "SHDN", NULL, "INB1" },
 110         { "SHDN", NULL, "INB2" },
 111
 112         { "OUT+", NULL, "RXIN+" },
 113         { "OUT+", NULL, "SHDN" },
 114
 115         { "OUT-", NULL, "SHDN" },
 116         { "OUT-", NULL, "RXIN-" },
 117
 118         { "HPL", NULL, "SHDN" },
 119         { "HPR", NULL, "SHDN" },
 120 };
 121
 122 static const struct snd_soc_component_driver max9877_component_driver = {
 123         .controls = max9877_controls,
 124         .num_controls = ARRAY_SIZE(max9877_controls),
 125
 126         .dapm_widgets = max9877_dapm_widgets,
 127         .num_dapm_widgets = ARRAY_SIZE(max9877_dapm_widgets),
 128         .dapm_routes = max9877_dapm_routes,
 129         .num_dapm_routes = ARRAY_SIZE(max9877_dapm_routes),
 130 };
 131
 132 static const struct regmap_config max9877_regmap = {
 133         .reg_bits = 8,
 134         .val_bits = 8,
 135
 136         .reg_defaults = max9877_regs,
 137         .num_reg_defaults = ARRAY_SIZE(max9877_regs),
 138         .cache_type = REGCACHE_RBTREE,
 139 };
 140
 141 static int max9877_i2c_probe(struct i2c_client *client,
 142                              const struct i2c_device_id *id)
 143 {
 144         struct regmap *regmap;
 145         int i;
 146
 147         regmap = devm_regmap_init_i2c(client, &max9877_regmap);
 148         if (IS_ERR(regmap))
 149                 return PTR_ERR(regmap);
 150
 151         /* Ensure the device is in reset state */
 152         for (i = 0; i < ARRAY_SIZE(max9877_regs); i++)
 153                 regmap_write(regmap, max9877_regs[i].reg, max9877_regs[i].def);
 154
 155         return devm_snd_soc_register_component(&client->dev,
 156                         &max9877_component_driver, NULL, 0);
 157 }
 158
 159 static const struct i2c_device_id max9877_i2c_id[] = {
 160         { "max9877", 0 },
 161         { }
 162 };
 163 MODULE_DEVICE_TABLE(i2c, max9877_i2c_id);
 164
 165 static struct i2c_driver max9877_i2c_driver = {
 166         .driver = {
 167                 .name = "max9877",
 168         },
 169         .probe = max9877_i2c_probe,
 170         .id_table = max9877_i2c_id,
 171 };
 172
 173 module_i2c_driver(max9877_i2c_driver);
 174
 175 MODULE_DESCRIPTION("ASoC MAX9877 amp driver");
 176 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 177 MODULE_LICENSE("GPL");