1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* LM4857 AMP driver
*
* Copyright 2007 Wolfson Microelectronics PLC.
* Author: Graeme Gregory
* graeme.gregory@wolfsonmicro.com
* Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/soc.h>
#include <sound/tlv.h>
static const struct reg_default lm4857_default_regs[] = {
{ 0x0, 0x00 },
{ 0x1, 0x00 },
{ 0x2, 0x00 },
{ 0x3, 0x00 },
};
/* The register offsets in the cache array */
#define LM4857_MVOL 0
#define LM4857_LVOL 1
#define LM4857_RVOL 2
#define LM4857_CTRL 3
/* the shifts required to set these bits */
#define LM4857_3D 5
#define LM4857_WAKEUP 5
#define LM4857_EPGAIN 4
static const unsigned int lm4857_mode_values[] = {
0,
6,
7,
8,
9,
};
static const char * const lm4857_mode_texts[] = {
"Off",
"Earpiece",
"Loudspeaker",
"Loudspeaker + Headphone",
"Headphone",
};
static SOC_VALUE_ENUM_SINGLE_AUTODISABLE_DECL(lm4857_mode_enum,
LM4857_CTRL, 0, 0xf, lm4857_mode_texts, lm4857_mode_values);
static const struct snd_kcontrol_new lm4857_mode_ctrl =
SOC_DAPM_ENUM("Mode", lm4857_mode_enum);
static const struct snd_soc_dapm_widget lm4857_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("IN"),
SND_SOC_DAPM_DEMUX("Mode", SND_SOC_NOPM, 0, 0, &lm4857_mode_ctrl),
SND_SOC_DAPM_OUTPUT("LS"),
SND_SOC_DAPM_OUTPUT("HP"),
SND_SOC_DAPM_OUTPUT("EP"),
};
static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);
static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);
static const struct snd_kcontrol_new lm4857_controls[] = {
SOC_SINGLE_TLV("Left Playback Volume", LM4857_LVOL, 0, 31, 0,
stereo_tlv),
SOC_SINGLE_TLV("Right Playback Volume", LM4857_RVOL, 0, 31, 0,
stereo_tlv),
SOC_SINGLE_TLV("Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
mono_tlv),
SOC_SINGLE("Spk 3D Playback Switch", LM4857_LVOL, LM4857_3D, 1, 0),
SOC_SINGLE("HP 3D Playback Switch", LM4857_RVOL, LM4857_3D, 1, 0),
SOC_SINGLE("Fast Wakeup Playback Switch", LM4857_CTRL,
LM4857_WAKEUP, 1, 0),
SOC_SINGLE("Earpiece 6dB Playback Switch", LM4857_CTRL,
LM4857_EPGAIN, 1, 0),
};
static const struct snd_soc_dapm_route lm4857_routes[] = {
{ "Mode", NULL, "IN" },
{ "LS", "Loudspeaker", "Mode" },
{ "LS", "Loudspeaker + Headphone", "Mode" },
{ "HP", "Headphone", "Mode" },
{ "HP", "Loudspeaker + Headphone", "Mode" },
{ "EP", "Earpiece", "Mode" },
};
static const struct snd_soc_component_driver lm4857_component_driver = {
.controls = lm4857_controls,
.num_controls = ARRAY_SIZE(lm4857_controls),
.dapm_widgets = lm4857_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(lm4857_dapm_widgets),
.dapm_routes = lm4857_routes,
.num_dapm_routes = ARRAY_SIZE(lm4857_routes),
};
static const struct regmap_config lm4857_regmap_config = {
.val_bits = 6,
.reg_bits = 2,
.max_register = LM4857_CTRL,
.cache_type = REGCACHE_FLAT,
.reg_defaults = lm4857_default_regs,
.num_reg_defaults = ARRAY_SIZE(lm4857_default_regs),
};
static int lm4857_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct regmap *regmap;
regmap = devm_regmap_init_i2c(i2c, &lm4857_regmap_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
return devm_snd_soc_register_component(&i2c->dev,
&lm4857_component_driver, NULL, 0);
}
static const struct i2c_device_id lm4857_i2c_id[] = {
{ "lm4857", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, lm4857_i2c_id);
static struct i2c_driver lm4857_i2c_driver = {
.driver = {
.name = "lm4857",
},
.probe = lm4857_i2c_probe,
.id_table = lm4857_i2c_id,
};
module_i2c_driver(lm4857_i2c_driver);
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_DESCRIPTION("LM4857 amplifier driver");
MODULE_LICENSE("GPL");
|
