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"); 189