1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * max9877.c -- amp driver for max9877 4 * 5 * Copyright (C) 2009 Samsung Electronics Co.Ltd 6 * Author: Joonyoung Shim <jy0922.shim@samsung.com> 7 */ 8 9 #include <linux/module.h> 10 #include <linux/init.h> 11 #include <linux/i2c.h> 12 #include <linux/regmap.h> 13 #include <sound/soc.h> 14 #include <sound/tlv.h> 15 16 #include "max9877.h" 17 18 static const struct reg_default max9877_regs[] = { 19 { 0, 0x40 }, 20 { 1, 0x00 }, 21 { 2, 0x00 }, 22 { 3, 0x00 }, 23 { 4, 0x49 }, 24 }; 25 26 static const DECLARE_TLV_DB_RANGE(max9877_pgain_tlv, 27 0, 1, TLV_DB_SCALE_ITEM(0, 900, 0), 28 2, 2, TLV_DB_SCALE_ITEM(2000, 0, 0) 29 ); 30 31 static const DECLARE_TLV_DB_RANGE(max9877_output_tlv, 32 0, 7, TLV_DB_SCALE_ITEM(-7900, 400, 1), 33 8, 15, TLV_DB_SCALE_ITEM(-4700, 300, 0), 34 16, 23, TLV_DB_SCALE_ITEM(-2300, 200, 0), 35 24, 31, TLV_DB_SCALE_ITEM(-700, 100, 0) 36 ); 37 38 static const char *max9877_out_mode[] = { 39 "INA -> SPK", 40 "INA -> HP", 41 "INA -> SPK and HP", 42 "INB -> SPK", 43 "INB -> HP", 44 "INB -> SPK and HP", 45 "INA + INB -> SPK", 46 "INA + INB -> HP", 47 "INA + INB -> SPK and HP", 48 }; 49 50 static const char *max9877_osc_mode[] = { 51 "1176KHz", 52 "1100KHz", 53 "700KHz", 54 }; 55 56 static const struct soc_enum max9877_enum[] = { 57 SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, 0, ARRAY_SIZE(max9877_out_mode), 58 max9877_out_mode), 59 SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, MAX9877_OSC_OFFSET, 60 ARRAY_SIZE(max9877_osc_mode), max9877_osc_mode), 61 }; 62 63 static const struct snd_kcontrol_new max9877_controls[] = { 64 SOC_SINGLE_TLV("MAX9877 PGAINA Playback Volume", 65 MAX9877_INPUT_MODE, 0, 2, 0, max9877_pgain_tlv), 66 SOC_SINGLE_TLV("MAX9877 PGAINB Playback Volume", 67 MAX9877_INPUT_MODE, 2, 2, 0, max9877_pgain_tlv), 68 SOC_SINGLE_TLV("MAX9877 Amp Speaker Playback Volume", 69 MAX9877_SPK_VOLUME, 0, 31, 0, max9877_output_tlv), 70 SOC_DOUBLE_R_TLV("MAX9877 Amp HP Playback Volume", 71 MAX9877_HPL_VOLUME, MAX9877_HPR_VOLUME, 0, 31, 0, 72 max9877_output_tlv), 73 SOC_SINGLE("MAX9877 INB Stereo Switch", 74 MAX9877_INPUT_MODE, 4, 1, 1), 75 SOC_SINGLE("MAX9877 INA Stereo Switch", 76 MAX9877_INPUT_MODE, 5, 1, 1), 77 SOC_SINGLE("MAX9877 Zero-crossing detection Switch", 78 MAX9877_INPUT_MODE, 6, 1, 0), 79 SOC_SINGLE("MAX9877 Bypass Mode Switch", 80 MAX9877_OUTPUT_MODE, 6, 1, 0), 81 SOC_ENUM("MAX9877 Output Mode", max9877_enum[0]), 82 SOC_ENUM("MAX9877 Oscillator Mode", max9877_enum[1]), 83 }; 84 85 static const struct snd_soc_dapm_widget max9877_dapm_widgets[] = { 86 SND_SOC_DAPM_INPUT("INA1"), 87 SND_SOC_DAPM_INPUT("INA2"), 88 SND_SOC_DAPM_INPUT("INB1"), 89 SND_SOC_DAPM_INPUT("INB2"), 90 SND_SOC_DAPM_INPUT("RXIN+"), 91 SND_SOC_DAPM_INPUT("RXIN-"), 92 93 SND_SOC_DAPM_PGA("SHDN", MAX9877_OUTPUT_MODE, 7, 1, NULL, 0), 94 95 SND_SOC_DAPM_OUTPUT("OUT+"), 96 SND_SOC_DAPM_OUTPUT("OUT-"), 97 SND_SOC_DAPM_OUTPUT("HPL"), 98 SND_SOC_DAPM_OUTPUT("HPR"), 99 }; 100 101 static const struct snd_soc_dapm_route max9877_dapm_routes[] = { 102 { "SHDN", NULL, "INA1" }, 103 { "SHDN", NULL, "INA2" }, 104 { "SHDN", NULL, "INB1" }, 105 { "SHDN", NULL, "INB2" }, 106 107 { "OUT+", NULL, "RXIN+" }, 108 { "OUT+", NULL, "SHDN" }, 109 110 { "OUT-", NULL, "SHDN" }, 111 { "OUT-", NULL, "RXIN-" }, 112 113 { "HPL", NULL, "SHDN" }, 114 { "HPR", NULL, "SHDN" }, 115 }; 116 117 static const struct snd_soc_component_driver max9877_component_driver = { 118 .controls = max9877_controls, 119 .num_controls = ARRAY_SIZE(max9877_controls), 120 121 .dapm_widgets = max9877_dapm_widgets, 122 .num_dapm_widgets = ARRAY_SIZE(max9877_dapm_widgets), 123 .dapm_routes = max9877_dapm_routes, 124 .num_dapm_routes = ARRAY_SIZE(max9877_dapm_routes), 125 }; 126 127 static const struct regmap_config max9877_regmap = { 128 .reg_bits = 8, 129 .val_bits = 8, 130 131 .reg_defaults = max9877_regs, 132 .num_reg_defaults = ARRAY_SIZE(max9877_regs), 133 .cache_type = REGCACHE_RBTREE, 134 }; 135 136 static int max9877_i2c_probe(struct i2c_client *client) 137 { 138 struct regmap *regmap; 139 int i; 140 141 regmap = devm_regmap_init_i2c(client, &max9877_regmap); 142 if (IS_ERR(regmap)) 143 return PTR_ERR(regmap); 144 145 /* Ensure the device is in reset state */ 146 for (i = 0; i < ARRAY_SIZE(max9877_regs); i++) 147 regmap_write(regmap, max9877_regs[i].reg, max9877_regs[i].def); 148 149 return devm_snd_soc_register_component(&client->dev, 150 &max9877_component_driver, NULL, 0); 151 } 152 153 static const struct i2c_device_id max9877_i2c_id[] = { 154 { "max9877", 0 }, 155 { } 156 }; 157 MODULE_DEVICE_TABLE(i2c, max9877_i2c_id); 158 159 static struct i2c_driver max9877_i2c_driver = { 160 .driver = { 161 .name = "max9877", 162 }, 163 .probe = max9877_i2c_probe, 164 .id_table = max9877_i2c_id, 165 }; 166 167 module_i2c_driver(max9877_i2c_driver); 168 169 MODULE_DESCRIPTION("ASoC MAX9877 amp driver"); 170 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 171 MODULE_LICENSE("GPL"); 172