2 * max9877.c -- amp driver for max9877
4 * Copyright (C) 2009 Samsung Electronics Co.Ltd
5 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
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.
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>
23 static struct regmap *regmap;
25 static struct reg_default max9877_regs[] = {
33 static const unsigned int max9877_pgain_tlv[] = {
35 0, 1, TLV_DB_SCALE_ITEM(0, 900, 0),
36 2, 2, TLV_DB_SCALE_ITEM(2000, 0, 0),
39 static const unsigned int max9877_output_tlv[] = {
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),
47 static const char *max9877_out_mode[] = {
56 "INA + INB -> SPK and HP",
59 static const char *max9877_osc_mode[] = {
65 static const struct soc_enum max9877_enum[] = {
66 SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, 0, ARRAY_SIZE(max9877_out_mode),
68 SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, MAX9877_OSC_OFFSET,
69 ARRAY_SIZE(max9877_osc_mode), max9877_osc_mode),
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,
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]),
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-"),
102 SND_SOC_DAPM_PGA("SHDN", MAX9877_OUTPUT_MODE, 7, 1, NULL, 0),
104 SND_SOC_DAPM_OUTPUT("OUT+"),
105 SND_SOC_DAPM_OUTPUT("OUT-"),
106 SND_SOC_DAPM_OUTPUT("HPL"),
107 SND_SOC_DAPM_OUTPUT("HPR"),
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" },
116 { "OUT+", NULL, "RXIN+" },
117 { "OUT+", NULL, "SHDN" },
119 { "OUT-", NULL, "SHDN" },
120 { "OUT-", NULL, "RXIN-" },
122 { "HPL", NULL, "SHDN" },
123 { "HPR", NULL, "SHDN" },
126 static const struct snd_soc_codec_driver max9877_codec = {
127 .controls = max9877_controls,
128 .num_controls = ARRAY_SIZE(max9877_controls),
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),
136 static const struct regmap_config max9877_regmap = {
140 .reg_defaults = max9877_regs,
141 .num_reg_defaults = ARRAY_SIZE(max9877_regs),
142 .cache_type = REGCACHE_RBTREE,
145 static int max9877_i2c_probe(struct i2c_client *client,
146 const struct i2c_device_id *id)
150 regmap = devm_regmap_init_i2c(client, &max9877_regmap);
152 return PTR_ERR(regmap);
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);
158 return snd_soc_register_codec(&client->dev, &max9877_codec, NULL, 0);
161 static int max9877_i2c_remove(struct i2c_client *client)
163 snd_soc_unregister_codec(&client->dev);
168 static const struct i2c_device_id max9877_i2c_id[] = {
172 MODULE_DEVICE_TABLE(i2c, max9877_i2c_id);
174 static struct i2c_driver max9877_i2c_driver = {
177 .owner = THIS_MODULE,
179 .probe = max9877_i2c_probe,
180 .remove = max9877_i2c_remove,
181 .id_table = max9877_i2c_id,
184 module_i2c_driver(max9877_i2c_driver);
186 MODULE_DESCRIPTION("ASoC MAX9877 amp driver");
187 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
188 MODULE_LICENSE("GPL");