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"); 178