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
|
/* Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* max98357a.c -- MAX98357A ALSA SoC Codec driver
*/
#include <linux/acpi.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <sound/soc-dapm.h>
static int max98357a_daiops_trigger(struct snd_pcm_substream *substream,
int cmd, struct snd_soc_dai *dai)
{
struct gpio_desc *sdmode = snd_soc_dai_get_drvdata(dai);
if (!sdmode)
return 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
gpiod_set_value(sdmode, 1);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
gpiod_set_value(sdmode, 0);
break;
}
return 0;
}
static const struct snd_soc_dapm_widget max98357a_dapm_widgets[] = {
SND_SOC_DAPM_OUTPUT("Speaker"),
};
static const struct snd_soc_dapm_route max98357a_dapm_routes[] = {
{"Speaker", NULL, "HiFi Playback"},
};
static int max98357a_codec_probe(struct snd_soc_codec *codec)
{
struct gpio_desc *sdmode;
sdmode = devm_gpiod_get_optional(codec->dev, "sdmode", GPIOD_OUT_LOW);
if (IS_ERR(sdmode))
return PTR_ERR(sdmode);
snd_soc_codec_set_drvdata(codec, sdmode);
return 0;
}
static const struct snd_soc_codec_driver max98357a_codec_driver = {
.probe = max98357a_codec_probe,
.component_driver = {
.dapm_widgets = max98357a_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(max98357a_dapm_widgets),
.dapm_routes = max98357a_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(max98357a_dapm_routes),
},
};
static const struct snd_soc_dai_ops max98357a_dai_ops = {
.trigger = max98357a_daiops_trigger,
};
static struct snd_soc_dai_driver max98357a_dai_driver = {
.name = "HiFi",
.playback = {
.stream_name = "HiFi Playback",
.formats = SNDRV_PCM_FMTBIT_S16 |
SNDRV_PCM_FMTBIT_S24 |
SNDRV_PCM_FMTBIT_S32,
.rates = SNDRV_PCM_RATE_8000 |
SNDRV_PCM_RATE_16000 |
SNDRV_PCM_RATE_48000 |
SNDRV_PCM_RATE_96000,
.rate_min = 8000,
.rate_max = 96000,
.channels_min = 1,
.channels_max = 2,
},
.ops = &max98357a_dai_ops,
};
static int max98357a_platform_probe(struct platform_device *pdev)
{
return snd_soc_register_codec(&pdev->dev, &max98357a_codec_driver,
&max98357a_dai_driver, 1);
}
static int max98357a_platform_remove(struct platform_device *pdev)
{
snd_soc_unregister_codec(&pdev->dev);
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id max98357a_device_id[] = {
{ .compatible = "maxim,max98357a" },
{}
};
MODULE_DEVICE_TABLE(of, max98357a_device_id);
#endif
#ifdef CONFIG_ACPI
static const struct acpi_device_id max98357a_acpi_match[] = {
{ "MX98357A", 0 },
{},
};
MODULE_DEVICE_TABLE(acpi, max98357a_acpi_match);
#endif
static struct platform_driver max98357a_platform_driver = {
.driver = {
.name = "max98357a",
.of_match_table = of_match_ptr(max98357a_device_id),
.acpi_match_table = ACPI_PTR(max98357a_acpi_match),
},
.probe = max98357a_platform_probe,
.remove = max98357a_platform_remove,
};
module_platform_driver(max98357a_platform_driver);
MODULE_DESCRIPTION("Maxim MAX98357A Codec Driver");
MODULE_LICENSE("GPL v2");
|
