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