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 unsigned int max9877_pgain_tlv[] = {
  32         TLV_DB_RANGE_HEAD(2),
  33         0, 1, TLV_DB_SCALE_ITEM(0, 900, 0),
  34         2, 2, TLV_DB_SCALE_ITEM(2000, 0, 0),
  35 };
  36
  37 static const unsigned int max9877_output_tlv[] = {
  38         TLV_DB_RANGE_HEAD(4),
  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_component_driver max9877_component_driver = {
 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         struct regmap *regmap;
 147         int i;
 148
 149         regmap = devm_regmap_init_i2c(client, &max9877_regmap);
 150         if (IS_ERR(regmap))
 151                 return PTR_ERR(regmap);
 152
 153         /* Ensure the device is in reset state */
 154         for (i = 0; i < ARRAY_SIZE(max9877_regs); i++)
 155                 regmap_write(regmap, max9877_regs[i].reg, max9877_regs[i].def);
 156
 157         return devm_snd_soc_register_component(&client->dev,
 158                         &max9877_component_driver, NULL, 0);
 159 }
 160
 161 static const struct i2c_device_id max9877_i2c_id[] = {
 162         { "max9877", 0 },
 163         { }
 164 };
 165 MODULE_DEVICE_TABLE(i2c, max9877_i2c_id);
 166
 167 static struct i2c_driver max9877_i2c_driver = {
 168         .driver = {
 169                 .name = "max9877",
 170         },
 171         .probe = max9877_i2c_probe,
 172         .id_table = max9877_i2c_id,
 173 };
 174
 175 module_i2c_driver(max9877_i2c_driver);
 176
 177 MODULE_DESCRIPTION("ASoC MAX9877 amp driver");
 178 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 179 MODULE_LICENSE("GPL");