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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* MAX9768 AMP driver
*
* Copyright (C) 2011, 2012 by Wolfram Sang, Pengutronix e.K.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/gpio/consumer.h>
#include <linux/regmap.h>
#include <sound/core.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <sound/max9768.h>
/* "Registers" */
#define MAX9768_VOL 0
#define MAX9768_CTRL 3
/* Commands */
#define MAX9768_CTRL_PWM 0x15
#define MAX9768_CTRL_FILTERLESS 0x16
struct max9768 {
struct regmap *regmap;
struct gpio_desc *mute;
struct gpio_desc *shdn;
u32 flags;
};
static const struct reg_default max9768_default_regs[] = {
{ 0, 0 },
{ 3, MAX9768_CTRL_FILTERLESS},
};
static int max9768_get_gpio(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
struct max9768 *max9768 = snd_soc_component_get_drvdata(c);
int val = gpiod_get_value_cansleep(max9768->mute);
ucontrol->value.integer.value[0] = !val;
return 0;
}
static int max9768_set_gpio(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
struct max9768 *max9768 = snd_soc_component_get_drvdata(c);
bool val = !ucontrol->value.integer.value[0];
int ret;
if (val != gpiod_get_value_cansleep(max9768->mute))
ret = 1;
else
ret = 0;
gpiod_set_value_cansleep(max9768->mute, val);
return ret;
}
static const DECLARE_TLV_DB_RANGE(volume_tlv,
0, 0, TLV_DB_SCALE_ITEM(-16150, 0, 0),
1, 1, TLV_DB_SCALE_ITEM(-9280, 0, 0),
2, 2, TLV_DB_SCALE_ITEM(-9030, 0, 0),
3, 3, TLV_DB_SCALE_ITEM(-8680, 0, 0),
4, 4, TLV_DB_SCALE_ITEM(-8430, 0, 0),
5, 5, TLV_DB_SCALE_ITEM(-8080, 0, 0),
6, 6, TLV_DB_SCALE_ITEM(-7830, 0, 0),
7, 7, TLV_DB_SCALE_ITEM(-7470, 0, 0),
8, 8, TLV_DB_SCALE_ITEM(-7220, 0, 0),
9, 9, TLV_DB_SCALE_ITEM(-6870, 0, 0),
10, 10, TLV_DB_SCALE_ITEM(-6620, 0, 0),
11, 11, TLV_DB_SCALE_ITEM(-6270, 0, 0),
12, 12, TLV_DB_SCALE_ITEM(-6020, 0, 0),
13, 13, TLV_DB_SCALE_ITEM(-5670, 0, 0),
14, 14, TLV_DB_SCALE_ITEM(-5420, 0, 0),
15, 17, TLV_DB_SCALE_ITEM(-5060, 250, 0),
18, 18, TLV_DB_SCALE_ITEM(-4370, 0, 0),
19, 19, TLV_DB_SCALE_ITEM(-4210, 0, 0),
20, 20, TLV_DB_SCALE_ITEM(-3960, 0, 0),
21, 21, TLV_DB_SCALE_ITEM(-3760, 0, 0),
22, 22, TLV_DB_SCALE_ITEM(-3600, 0, 0),
23, 23, TLV_DB_SCALE_ITEM(-3340, 0, 0),
24, 24, TLV_DB_SCALE_ITEM(-3150, 0, 0),
25, 25, TLV_DB_SCALE_ITEM(-2980, 0, 0),
26, 26, TLV_DB_SCALE_ITEM(-2720, 0, 0),
27, 27, TLV_DB_SCALE_ITEM(-2520, 0, 0),
28, 30, TLV_DB_SCALE_ITEM(-2350, 190, 0),
31, 31, TLV_DB_SCALE_ITEM(-1750, 0, 0),
32, 34, TLV_DB_SCALE_ITEM(-1640, 100, 0),
35, 37, TLV_DB_SCALE_ITEM(-1310, 110, 0),
38, 39, TLV_DB_SCALE_ITEM(-990, 100, 0),
40, 40, TLV_DB_SCALE_ITEM(-710, 0, 0),
41, 41, TLV_DB_SCALE_ITEM(-600, 0, 0),
42, 42, TLV_DB_SCALE_ITEM(-500, 0, 0),
43, 43, TLV_DB_SCALE_ITEM(-340, 0, 0),
44, 44, TLV_DB_SCALE_ITEM(-190, 0, 0),
45, 45, TLV_DB_SCALE_ITEM(-50, 0, 0),
46, 46, TLV_DB_SCALE_ITEM(50, 0, 0),
47, 50, TLV_DB_SCALE_ITEM(120, 40, 0),
51, 57, TLV_DB_SCALE_ITEM(290, 50, 0),
58, 58, TLV_DB_SCALE_ITEM(650, 0, 0),
59, 62, TLV_DB_SCALE_ITEM(700, 60, 0),
63, 63, TLV_DB_SCALE_ITEM(950, 0, 0)
);
static const struct snd_kcontrol_new max9768_volume[] = {
SOC_SINGLE_TLV("Playback Volume", MAX9768_VOL, 0, 63, 0, volume_tlv),
};
static const struct snd_kcontrol_new max9768_mute[] = {
SOC_SINGLE_BOOL_EXT("Playback Switch", 0, max9768_get_gpio, max9768_set_gpio),
};
static const struct snd_soc_dapm_widget max9768_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("IN"),
SND_SOC_DAPM_OUTPUT("OUT+"),
SND_SOC_DAPM_OUTPUT("OUT-"),
};
static const struct snd_soc_dapm_route max9768_dapm_routes[] = {
{ "OUT+", NULL, "IN" },
{ "OUT-", NULL, "IN" },
};
static int max9768_probe(struct snd_soc_component *component)
{
struct max9768 *max9768 = snd_soc_component_get_drvdata(component);
int ret;
if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) {
ret = regmap_write(max9768->regmap, MAX9768_CTRL,
MAX9768_CTRL_PWM);
if (ret)
return ret;
}
if (max9768->mute) {
ret = snd_soc_add_component_controls(component, max9768_mute,
ARRAY_SIZE(max9768_mute));
if (ret)
return ret;
}
return 0;
}
static const struct snd_soc_component_driver max9768_component_driver = {
.probe = max9768_probe,
.controls = max9768_volume,
.num_controls = ARRAY_SIZE(max9768_volume),
.dapm_widgets = max9768_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(max9768_dapm_widgets),
.dapm_routes = max9768_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(max9768_dapm_routes),
};
static const struct regmap_config max9768_i2c_regmap_config = {
.reg_bits = 2,
.val_bits = 6,
.max_register = 3,
.reg_defaults = max9768_default_regs,
.num_reg_defaults = ARRAY_SIZE(max9768_default_regs),
.cache_type = REGCACHE_RBTREE,
};
static int max9768_i2c_probe(struct i2c_client *client)
{
struct max9768 *max9768;
struct max9768_pdata *pdata = client->dev.platform_data;
max9768 = devm_kzalloc(&client->dev, sizeof(*max9768), GFP_KERNEL);
if (!max9768)
return -ENOMEM;
/* Mute on powerup to avoid clicks */
max9768->mute = devm_gpiod_get_optional(&client->dev,
"mute",
GPIOD_OUT_HIGH);
if (IS_ERR(max9768->mute))
return PTR_ERR(max9768->mute);
gpiod_set_consumer_name(max9768->mute, "MAX9768 Mute");
/* Activate chip by releasing shutdown, enables I2C */
max9768->shdn = devm_gpiod_get_optional(&client->dev,
"shutdown",
GPIOD_OUT_HIGH);
if (IS_ERR(max9768->shdn))
return PTR_ERR(max9768->shdn);
gpiod_set_consumer_name(max9768->shdn, "MAX9768 Shutdown");
if (pdata)
max9768->flags = pdata->flags;
i2c_set_clientdata(client, max9768);
max9768->regmap = devm_regmap_init_i2c(client, &max9768_i2c_regmap_config);
if (IS_ERR(max9768->regmap))
return PTR_ERR(max9768->regmap);
return devm_snd_soc_register_component(&client->dev,
&max9768_component_driver, NULL, 0);
}
static const struct i2c_device_id max9768_i2c_id[] = {
{ "max9768" },
{ }
};
MODULE_DEVICE_TABLE(i2c, max9768_i2c_id);
static struct i2c_driver max9768_i2c_driver = {
.driver = {
.name = "max9768",
},
.probe = max9768_i2c_probe,
.id_table = max9768_i2c_id,
};
module_i2c_driver(max9768_i2c_driver);
MODULE_AUTHOR("Wolfram Sang <kernel@pengutronix.de>");
MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver");
MODULE_LICENSE("GPL v2");
|
