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
|
// SPDX-License-Identifier: GPL-2.0-only
//
// rt1015p.c -- RT1015P ALSA SoC audio amplifier driver
//
// Copyright 2020 The Linux Foundation. All rights reserved.
#include <linux/device.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/kernel.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 rt1015p_priv {
struct gpio_desc *sdb;
int sdb_switch;
};
static int rt1015p_daiops_trigger(struct snd_pcm_substream *substream,
int cmd, struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct rt1015p_priv *rt1015p =
snd_soc_component_get_drvdata(component);
if (!rt1015p->sdb)
return 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
if (rt1015p->sdb_switch) {
gpiod_set_value(rt1015p->sdb, 1);
dev_dbg(component->dev, "set sdb to 1");
}
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
gpiod_set_value(rt1015p->sdb, 0);
dev_dbg(component->dev, "set sdb to 0");
break;
}
return 0;
}
static int rt1015p_sdb_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 rt1015p_priv *rt1015p =
snd_soc_component_get_drvdata(component);
if (event & SND_SOC_DAPM_POST_PMU)
rt1015p->sdb_switch = 1;
else if (event & SND_SOC_DAPM_POST_PMD)
rt1015p->sdb_switch = 0;
return 0;
}
static const struct snd_soc_dapm_widget rt1015p_dapm_widgets[] = {
SND_SOC_DAPM_OUTPUT("Speaker"),
SND_SOC_DAPM_OUT_DRV_E("SDB", SND_SOC_NOPM, 0, 0, NULL, 0,
rt1015p_sdb_event,
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
};
static const struct snd_soc_dapm_route rt1015p_dapm_routes[] = {
{"SDB", NULL, "HiFi Playback"},
{"Speaker", NULL, "SDB"},
};
static const struct snd_soc_component_driver rt1015p_component_driver = {
.dapm_widgets = rt1015p_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(rt1015p_dapm_widgets),
.dapm_routes = rt1015p_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(rt1015p_dapm_routes),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
.non_legacy_dai_naming = 1,
};
static const struct snd_soc_dai_ops rt1015p_dai_ops = {
.trigger = rt1015p_daiops_trigger,
};
static struct snd_soc_dai_driver rt1015p_dai_driver = {
.name = "HiFi",
.playback = {
.stream_name = "HiFi Playback",
.formats = SNDRV_PCM_FMTBIT_S24,
.rates = SNDRV_PCM_RATE_48000,
.channels_min = 1,
.channels_max = 2,
},
.ops = &rt1015p_dai_ops,
};
static int rt1015p_platform_probe(struct platform_device *pdev)
{
struct rt1015p_priv *rt1015p;
rt1015p = devm_kzalloc(&pdev->dev, sizeof(*rt1015p), GFP_KERNEL);
if (!rt1015p)
return -ENOMEM;
rt1015p->sdb = devm_gpiod_get_optional(&pdev->dev,
"sdb", GPIOD_OUT_LOW);
if (IS_ERR(rt1015p->sdb))
return PTR_ERR(rt1015p->sdb);
dev_set_drvdata(&pdev->dev, rt1015p);
return devm_snd_soc_register_component(&pdev->dev,
&rt1015p_component_driver,
&rt1015p_dai_driver, 1);
}
#ifdef CONFIG_OF
static const struct of_device_id rt1015p_device_id[] = {
{ .compatible = "realtek,rt1015p" },
{}
};
MODULE_DEVICE_TABLE(of, rt1015p_device_id);
#endif
static struct platform_driver rt1015p_platform_driver = {
.driver = {
.name = "rt1015p",
.of_match_table = of_match_ptr(rt1015p_device_id),
},
.probe = rt1015p_platform_probe,
};
module_platform_driver(rt1015p_platform_driver);
MODULE_DESCRIPTION("ASoC RT1015P driver");
MODULE_LICENSE("GPL v2");
|
