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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* ALSA SoC driver for
* Asahi Kasei AK5386 Single-ended 24-Bit 192kHz delta-sigma ADC
*
* (c) 2013 Daniel Mack <zonque@gmail.com>
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/of_device.h>
#include <linux/regulator/consumer.h>
#include <sound/soc.h>
#include <sound/pcm.h>
#include <sound/initval.h>
static const char * const supply_names[] = {
"va", "vd"
};
struct ak5386_priv {
int reset_gpio;
struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
};
static const struct snd_soc_dapm_widget ak5386_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("AINL"),
SND_SOC_DAPM_INPUT("AINR"),
};
static const struct snd_soc_dapm_route ak5386_dapm_routes[] = {
{ "Capture", NULL, "AINL" },
{ "Capture", NULL, "AINR" },
};
static int ak5386_soc_probe(struct snd_soc_component *component)
{
struct ak5386_priv *priv = snd_soc_component_get_drvdata(component);
return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
}
static void ak5386_soc_remove(struct snd_soc_component *component)
{
struct ak5386_priv *priv = snd_soc_component_get_drvdata(component);
regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
}
#ifdef CONFIG_PM
static int ak5386_soc_suspend(struct snd_soc_component *component)
{
struct ak5386_priv *priv = snd_soc_component_get_drvdata(component);
regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
return 0;
}
static int ak5386_soc_resume(struct snd_soc_component *component)
{
struct ak5386_priv *priv = snd_soc_component_get_drvdata(component);
return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
}
#else
#define ak5386_soc_suspend NULL
#define ak5386_soc_resume NULL
#endif /* CONFIG_PM */
static const struct snd_soc_component_driver soc_component_ak5386 = {
.probe = ak5386_soc_probe,
.remove = ak5386_soc_remove,
.suspend = ak5386_soc_suspend,
.resume = ak5386_soc_resume,
.dapm_widgets = ak5386_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(ak5386_dapm_widgets),
.dapm_routes = ak5386_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(ak5386_dapm_routes),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
};
static int ak5386_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int format)
{
struct snd_soc_component *component = codec_dai->component;
format &= SND_SOC_DAIFMT_FORMAT_MASK;
if (format != SND_SOC_DAIFMT_LEFT_J &&
format != SND_SOC_DAIFMT_I2S) {
dev_err(component->dev, "Invalid DAI format\n");
return -EINVAL;
}
return 0;
}
static int ak5386_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct ak5386_priv *priv = snd_soc_component_get_drvdata(component);
/*
* From the datasheet:
*
* All external clocks (MCLK, SCLK and LRCK) must be present unless
* PDN pin = “L”. If these clocks are not provided, the AK5386 may
* draw excess current due to its use of internal dynamically
* refreshed logic. If the external clocks are not present, place
* the AK5386 in power-down mode (PDN pin = “L”).
*/
if (gpio_is_valid(priv->reset_gpio))
gpio_set_value(priv->reset_gpio, 1);
return 0;
}
static int ak5386_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct ak5386_priv *priv = snd_soc_component_get_drvdata(component);
if (gpio_is_valid(priv->reset_gpio))
gpio_set_value(priv->reset_gpio, 0);
return 0;
}
static const struct snd_soc_dai_ops ak5386_dai_ops = {
.set_fmt = ak5386_set_dai_fmt,
.hw_params = ak5386_hw_params,
.hw_free = ak5386_hw_free,
};
static struct snd_soc_dai_driver ak5386_dai = {
.name = "ak5386-hifi",
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S24_3LE,
},
.ops = &ak5386_dai_ops,
};
#ifdef CONFIG_OF
static const struct of_device_id ak5386_dt_ids[] = {
{ .compatible = "asahi-kasei,ak5386", },
{ }
};
MODULE_DEVICE_TABLE(of, ak5386_dt_ids);
#endif
static int ak5386_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct ak5386_priv *priv;
int ret, i;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->reset_gpio = -EINVAL;
dev_set_drvdata(dev, priv);
for (i = 0; i < ARRAY_SIZE(supply_names); i++)
priv->supplies[i].supply = supply_names[i];
ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies),
priv->supplies);
if (ret < 0)
return ret;
if (of_match_device(of_match_ptr(ak5386_dt_ids), dev))
priv->reset_gpio = of_get_named_gpio(dev->of_node,
"reset-gpio", 0);
if (gpio_is_valid(priv->reset_gpio))
if (devm_gpio_request_one(dev, priv->reset_gpio,
GPIOF_OUT_INIT_LOW,
"AK5386 Reset"))
priv->reset_gpio = -EINVAL;
return devm_snd_soc_register_component(dev, &soc_component_ak5386,
&ak5386_dai, 1);
}
static struct platform_driver ak5386_driver = {
.probe = ak5386_probe,
.driver = {
.name = "ak5386",
.of_match_table = of_match_ptr(ak5386_dt_ids),
},
};
module_platform_driver(ak5386_driver);
MODULE_DESCRIPTION("ASoC driver for AK5386 ADC");
MODULE_AUTHOR("Daniel Mack <zonque@gmail.com>");
MODULE_LICENSE("GPL");
|
