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
|
/*
* ASoC machine driver for Snow boards
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* 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.
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <sound/soc.h>
#include "i2s.h"
#define FIN_PLL_RATE 24000000
static struct snd_soc_dai_link snow_dai[] = {
{
.name = "Primary",
.stream_name = "Primary",
.codec_dai_name = "HiFi",
.dai_fmt = SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
},
};
static int snow_late_probe(struct snd_soc_card *card)
{
struct snd_soc_pcm_runtime *rtd;
struct snd_soc_dai *codec_dai;
struct snd_soc_dai *cpu_dai;
int ret;
rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
codec_dai = rtd->codec_dai;
cpu_dai = rtd->cpu_dai;
/* Set the MCLK rate for the codec */
ret = snd_soc_dai_set_sysclk(codec_dai, 0,
FIN_PLL_RATE, SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
/* Select I2S Bus clock to set RCLK and BCLK */
ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
0, SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
return 0;
}
static struct snd_soc_card snow_snd = {
.name = "Snow-I2S",
.owner = THIS_MODULE,
.dai_link = snow_dai,
.num_links = ARRAY_SIZE(snow_dai),
.late_probe = snow_late_probe,
};
static int snow_probe(struct platform_device *pdev)
{
struct snd_soc_card *card = &snow_snd;
struct device_node *i2s_node, *codec_node;
int i, ret;
i2s_node = of_parse_phandle(pdev->dev.of_node,
"samsung,i2s-controller", 0);
if (!i2s_node) {
dev_err(&pdev->dev,
"Property 'i2s-controller' missing or invalid\n");
return -EINVAL;
}
codec_node = of_parse_phandle(pdev->dev.of_node,
"samsung,audio-codec", 0);
if (!codec_node) {
dev_err(&pdev->dev,
"Property 'audio-codec' missing or invalid\n");
return -EINVAL;
}
for (i = 0; i < ARRAY_SIZE(snow_dai); i++) {
snow_dai[i].codec_of_node = codec_node;
snow_dai[i].cpu_of_node = i2s_node;
snow_dai[i].platform_of_node = i2s_node;
}
card->dev = &pdev->dev;
/* Update card-name if provided through DT, else use default name */
snd_soc_of_parse_card_name(card, "samsung,model");
ret = devm_snd_soc_register_card(&pdev->dev, card);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
return ret;
}
return ret;
}
static const struct of_device_id snow_of_match[] = {
{ .compatible = "google,snow-audio-max98090", },
{ .compatible = "google,snow-audio-max98091", },
{ .compatible = "google,snow-audio-max98095", },
{},
};
MODULE_DEVICE_TABLE(of, snow_of_match);
static struct platform_driver snow_driver = {
.driver = {
.name = "snow-audio",
.pm = &snd_soc_pm_ops,
.of_match_table = snow_of_match,
},
.probe = snow_probe,
};
module_platform_driver(snow_driver);
MODULE_DESCRIPTION("ALSA SoC Audio machine driver for Snow");
MODULE_LICENSE("GPL");
|
