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 struct regmap *regmap;
  24
  25 static struct reg_default max9877_regs[] = {
  26         { 0, 0x40 },
  27         { 1, 0x00 },
  28         { 2, 0x00 },
  29         { 3, 0x00 },
  30         { 4, 0x49 },
  31 };
  32
  33 static const unsigned int max9877_pgain_tlv[] = {
  34         TLV_DB_RANGE_HEAD(2),
  35         0, 1, TLV_DB_SCALE_ITEM(0, 900, 0),
  36         2, 2, TLV_DB_SCALE_ITEM(2000, 0, 0),
  37 };
  38
  39 static const unsigned int max9877_output_tlv[] = {
  40         TLV_DB_RANGE_HEAD(4),
  41         0, 7, TLV_DB_SCALE_ITEM(-7900, 400, 1),
  42         8, 15, TLV_DB_SCALE_ITEM(-4700, 300, 0),
  43         16, 23, TLV_DB_SCALE_ITEM(-2300, 200, 0),
  44         24, 31, TLV_DB_SCALE_ITEM(-700, 100, 0),
  45 };
  46
  47 static const char *max9877_out_mode[] = {
  48         "INA -> SPK",
  49         "INA -> HP",
  50         "INA -> SPK and HP",
  51         "INB -> SPK",
  52         "INB -> HP",
  53         "INB -> SPK and HP",
  54         "INA + INB -> SPK",
  55         "INA + INB -> HP",
  56         "INA + INB -> SPK and HP",
  57 };
  58
  59 static const char *max9877_osc_mode[] = {
  60         "1176KHz",
  61         "1100KHz",
  62         "700KHz",
  63 };
  64
  65 static const struct soc_enum max9877_enum[] = {
  66         SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, 0, ARRAY_SIZE(max9877_out_mode),
  67                         max9877_out_mode),
  68         SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, MAX9877_OSC_OFFSET,
  69                         ARRAY_SIZE(max9877_osc_mode), max9877_osc_mode),
  70 };
  71
  72 static const struct snd_kcontrol_new max9877_controls[] = {
  73         SOC_SINGLE_TLV("MAX9877 PGAINA Playback Volume",
  74                        MAX9877_INPUT_MODE, 0, 2, 0, max9877_pgain_tlv),
  75         SOC_SINGLE_TLV("MAX9877 PGAINB Playback Volume",
  76                        MAX9877_INPUT_MODE, 2, 2, 0, max9877_pgain_tlv),
  77         SOC_SINGLE_TLV("MAX9877 Amp Speaker Playback Volume",
  78                        MAX9877_SPK_VOLUME, 0, 31, 0, max9877_output_tlv),
  79         SOC_DOUBLE_R_TLV("MAX9877 Amp HP Playback Volume",
  80                          MAX9877_HPL_VOLUME, MAX9877_HPR_VOLUME, 0, 31, 0,
  81                          max9877_output_tlv),
  82         SOC_SINGLE("MAX9877 INB Stereo Switch",
  83                    MAX9877_INPUT_MODE, 4, 1, 1),
  84         SOC_SINGLE("MAX9877 INA Stereo Switch",
  85                    MAX9877_INPUT_MODE, 5, 1, 1),
  86         SOC_SINGLE("MAX9877 Zero-crossing detection Switch",
  87                    MAX9877_INPUT_MODE, 6, 1, 0),
  88         SOC_SINGLE("MAX9877 Bypass Mode Switch",
  89                    MAX9877_OUTPUT_MODE, 6, 1, 0),
  90         SOC_ENUM("MAX9877 Output Mode", max9877_enum[0]),
  91         SOC_ENUM("MAX9877 Oscillator Mode", max9877_enum[1]),
  92 };
  93
  94 static const struct snd_soc_dapm_widget max9877_dapm_widgets[] = {
  95 SND_SOC_DAPM_INPUT("INA1"),
  96 SND_SOC_DAPM_INPUT("INA2"),
  97 SND_SOC_DAPM_INPUT("INB1"),
  98 SND_SOC_DAPM_INPUT("INB2"),
  99 SND_SOC_DAPM_INPUT("RXIN+"),
 100 SND_SOC_DAPM_INPUT("RXIN-"),
 101
 102 SND_SOC_DAPM_PGA("SHDN", MAX9877_OUTPUT_MODE, 7, 1, NULL, 0),
 103
 104 SND_SOC_DAPM_OUTPUT("OUT+"),
 105 SND_SOC_DAPM_OUTPUT("OUT-"),
 106 SND_SOC_DAPM_OUTPUT("HPL"),
 107 SND_SOC_DAPM_OUTPUT("HPR"),
 108 };
 109
 110 static const struct snd_soc_dapm_route max9877_dapm_routes[] = {
 111         { "SHDN", NULL, "INA1" },
 112         { "SHDN", NULL, "INA2" },
 113         { "SHDN", NULL, "INB1" },
 114         { "SHDN", NULL, "INB2" },
 115
 116         { "OUT+", NULL, "RXIN+" },
 117         { "OUT+", NULL, "SHDN" },
 118
 119         { "OUT-", NULL, "SHDN" },
 120         { "OUT-", NULL, "RXIN-" },
 121
 122         { "HPL", NULL, "SHDN" },
 123         { "HPR", NULL, "SHDN" },
 124 };
 125
 126 static const struct snd_soc_codec_driver max9877_codec = {
 127         .controls = max9877_controls,
 128         .num_controls = ARRAY_SIZE(max9877_controls),
 129
 130         .dapm_widgets = max9877_dapm_widgets,
 131         .num_dapm_widgets = ARRAY_SIZE(max9877_dapm_widgets),
 132         .dapm_routes = max9877_dapm_routes,
 133         .num_dapm_routes = ARRAY_SIZE(max9877_dapm_routes),
 134 };
 135
 136 static const struct regmap_config max9877_regmap = {
 137         .reg_bits = 8,
 138         .val_bits = 8,
 139
 140         .reg_defaults = max9877_regs,
 141         .num_reg_defaults = ARRAY_SIZE(max9877_regs),
 142         .cache_type = REGCACHE_RBTREE,
 143 };
 144
 145 static int max9877_i2c_probe(struct i2c_client *client,
 146                              const struct i2c_device_id *id)
 147 {
 148         int i;
 149
 150         regmap = devm_regmap_init_i2c(client, &max9877_regmap);
 151         if (IS_ERR(regmap))
 152                 return PTR_ERR(regmap);
 153
 154         /* Ensure the device is in reset state */
 155         for (i = 0; i < ARRAY_SIZE(max9877_regs); i++)
 156                 regmap_write(regmap, max9877_regs[i].reg, max9877_regs[i].def);
 157
 158         return snd_soc_register_codec(&client->dev, &max9877_codec, NULL, 0);
 159 }
 160
 161 static int max9877_i2c_remove(struct i2c_client *client)
 162 {
 163         snd_soc_unregister_codec(&client->dev);
 164
 165         return 0;
 166 }
 167
 168 static const struct i2c_device_id max9877_i2c_id[] = {
 169         { "max9877", 0 },
 170         { }
 171 };
 172 MODULE_DEVICE_TABLE(i2c, max9877_i2c_id);
 173
 174 static struct i2c_driver max9877_i2c_driver = {
 175         .driver = {
 176                 .name = "max9877",
 177                 .owner = THIS_MODULE,
 178         },
 179         .probe = max9877_i2c_probe,
 180         .remove = max9877_i2c_remove,
 181         .id_table = max9877_i2c_id,
 182 };
 183
 184 module_i2c_driver(max9877_i2c_driver);
 185
 186 MODULE_DESCRIPTION("ASoC MAX9877 amp driver");
 187 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 188 MODULE_LICENSE("GPL");