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
|
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
*
* max98357a.c -- MAX98357A ALSA SoC Codec driver
*/
#include <linux/acpi.h>
#include <linux/delay.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>
struct max98357a_priv {
struct gpio_desc *sdmode;
unsigned int sdmode_delay;
};
static int max98357a_sdmode_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_component *component =
snd_soc_dapm_to_component(w->dapm);
struct max98357a_priv *max98357a =
snd_soc_component_get_drvdata(component);
if (!max98357a->sdmode)
return 0;
if (event & SND_SOC_DAPM_POST_PMU) {
msleep(max98357a->sdmode_delay);
gpiod_set_value(max98357a->sdmode, 1);
dev_dbg(component->dev, "set sdmode to 1");
} else if (event & SND_SOC_DAPM_PRE_PMD) {
gpiod_set_value(max98357a->sdmode, 0);
dev_dbg(component->dev, "set sdmode to 0");
}
return 0;
}
static const struct snd_soc_dapm_widget max98357a_dapm_widgets[] = {
SND_SOC_DAPM_OUTPUT("Speaker"),
SND_SOC_DAPM_OUT_DRV_E("SD_MODE", SND_SOC_NOPM, 0, 0, NULL, 0,
max98357a_sdmode_event,
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
};
static const struct snd_soc_dapm_route max98357a_dapm_routes[] = {
{"SD_MODE", NULL, "HiFi Playback"},
{"Speaker", NULL, "SD_MODE"},
};
static const struct snd_soc_component_driver max98357a_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),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
.non_legacy_dai_naming = 1,
};
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_32000 |
SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_48000 |
SNDRV_PCM_RATE_88200 |
SNDRV_PCM_RATE_96000,
.rate_min = 8000,
.rate_max = 96000,
.channels_min = 1,
.channels_max = 2,
},
};
static int max98357a_platform_probe(struct platform_device *pdev)
{
struct max98357a_priv *max98357a;
int ret;
max98357a = devm_kzalloc(&pdev->dev, sizeof(*max98357a), GFP_KERNEL);
if (!max98357a)
return -ENOMEM;
max98357a->sdmode = devm_gpiod_get_optional(&pdev->dev,
"sdmode", GPIOD_OUT_LOW);
if (IS_ERR(max98357a->sdmode))
return PTR_ERR(max98357a->sdmode);
ret = device_property_read_u32(&pdev->dev, "sdmode-delay",
&max98357a->sdmode_delay);
if (ret) {
max98357a->sdmode_delay = 0;
dev_dbg(&pdev->dev,
"no optional property 'sdmode-delay' found, "
"default: no delay\n");
}
dev_set_drvdata(&pdev->dev, max98357a);
return devm_snd_soc_register_component(&pdev->dev,
&max98357a_component_driver,
&max98357a_dai_driver, 1);
}
#ifdef CONFIG_OF
static const struct of_device_id max98357a_device_id[] = {
{ .compatible = "maxim,max98357a" },
{ .compatible = "maxim,max98360a" },
{}
};
MODULE_DEVICE_TABLE(of, max98357a_device_id);
#endif
#ifdef CONFIG_ACPI
static const struct acpi_device_id max98357a_acpi_match[] = {
{ "MX98357A", 0 },
{ "MX98360A", 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,
};
module_platform_driver(max98357a_platform_driver);
MODULE_DESCRIPTION("Maxim MAX98357A Codec Driver");
MODULE_LICENSE("GPL v2");
|
