tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
23static const struct reg_default max9877_regs[] = {
24 { 0, 0x40 },
25 { 1, 0x00 },
26 { 2, 0x00 },
27 { 3, 0x00 },
28 { 4, 0x49 },
29};
30
31static 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
36static 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
43static 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
55static const char *max9877_osc_mode[] = {
56 "1176KHz",
57 "1100KHz",
58 "700KHz",
59};
60
61static 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
68static 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
90static const struct snd_soc_dapm_widget max9877_dapm_widgets[] = {
91SND_SOC_DAPM_INPUT("INA1"),
92SND_SOC_DAPM_INPUT("INA2"),
93SND_SOC_DAPM_INPUT("INB1"),
94SND_SOC_DAPM_INPUT("INB2"),
95SND_SOC_DAPM_INPUT("RXIN+"),
96SND_SOC_DAPM_INPUT("RXIN-"),
97
98SND_SOC_DAPM_PGA("SHDN", MAX9877_OUTPUT_MODE, 7, 1, NULL, 0),
99
100SND_SOC_DAPM_OUTPUT("OUT+"),
101SND_SOC_DAPM_OUTPUT("OUT-"),
102SND_SOC_DAPM_OUTPUT("HPL"),
103SND_SOC_DAPM_OUTPUT("HPR"),
104};
105
106static 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
122static 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
132static 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
141static 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
159static const struct i2c_device_id max9877_i2c_id[] = {
160 { "max9877", 0 },
161 { }
162};
163MODULE_DEVICE_TABLE(i2c, max9877_i2c_id);
164
165static 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
173module_i2c_driver(max9877_i2c_driver);
174
175MODULE_DESCRIPTION("ASoC MAX9877 amp driver");
176MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
177MODULE_LICENSE("GPL");