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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* ASoC driver for PROTO AudioCODEC (with a WM8731)
*
* Author: Florian Meier, <koalo@koalo.de>
* Copyright 2013
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/jack.h>
#include "../codecs/wm8731.h"
#define XTAL_RATE 12288000 /* This is fixed on this board */
static int snd_proto_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_card *card = rtd->card;
struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
/* Set proto sysclk */
int ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
XTAL_RATE, SND_SOC_CLOCK_IN);
if (ret < 0) {
dev_err(card->dev, "Failed to set WM8731 SYSCLK: %d\n",
ret);
return ret;
}
return 0;
}
static const struct snd_soc_dapm_widget snd_proto_widget[] = {
SND_SOC_DAPM_MIC("Microphone Jack", NULL),
SND_SOC_DAPM_HP("Headphone Jack", NULL),
};
static const struct snd_soc_dapm_route snd_proto_route[] = {
/* speaker connected to LHPOUT/RHPOUT */
{"Headphone Jack", NULL, "LHPOUT"},
{"Headphone Jack", NULL, "RHPOUT"},
/* mic is connected to Mic Jack, with WM8731 Mic Bias */
{"MICIN", NULL, "Mic Bias"},
{"Mic Bias", NULL, "Microphone Jack"},
};
/* audio machine driver */
static struct snd_soc_card snd_proto = {
.name = "snd_mikroe_proto",
.owner = THIS_MODULE,
.dapm_widgets = snd_proto_widget,
.num_dapm_widgets = ARRAY_SIZE(snd_proto_widget),
.dapm_routes = snd_proto_route,
.num_dapm_routes = ARRAY_SIZE(snd_proto_route),
};
static int snd_proto_probe(struct platform_device *pdev)
{
struct snd_soc_dai_link *dai;
struct snd_soc_dai_link_component *comp;
struct device_node *np = pdev->dev.of_node;
struct device_node *codec_np, *cpu_np;
struct device_node *bitclkmaster = NULL;
struct device_node *framemaster = NULL;
unsigned int dai_fmt;
int ret = 0;
if (!np) {
dev_err(&pdev->dev, "No device node supplied\n");
return -EINVAL;
}
snd_proto.dev = &pdev->dev;
ret = snd_soc_of_parse_card_name(&snd_proto, "model");
if (ret)
return ret;
dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);
if (!dai)
return -ENOMEM;
/* for cpus/codecs/platforms */
comp = devm_kzalloc(&pdev->dev, 3 * sizeof(*comp), GFP_KERNEL);
if (!comp)
return -ENOMEM;
snd_proto.dai_link = dai;
snd_proto.num_links = 1;
dai->cpus = &comp[0];
dai->num_cpus = 1;
dai->codecs = &comp[1];
dai->num_codecs = 1;
dai->platforms = &comp[2];
dai->num_platforms = 1;
dai->name = "WM8731";
dai->stream_name = "WM8731 HiFi";
dai->codecs->dai_name = "wm8731-hifi";
dai->init = &snd_proto_init;
codec_np = of_parse_phandle(np, "audio-codec", 0);
if (!codec_np) {
dev_err(&pdev->dev, "audio-codec node missing\n");
return -EINVAL;
}
dai->codecs->of_node = codec_np;
cpu_np = of_parse_phandle(np, "i2s-controller", 0);
if (!cpu_np) {
dev_err(&pdev->dev, "i2s-controller missing\n");
return -EINVAL;
}
dai->cpus->of_node = cpu_np;
dai->platforms->of_node = cpu_np;
dai_fmt = snd_soc_of_parse_daifmt(np, NULL,
&bitclkmaster, &framemaster);
if (bitclkmaster != framemaster) {
dev_err(&pdev->dev, "Must be the same bitclock and frame master\n");
return -EINVAL;
}
if (bitclkmaster) {
dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
if (codec_np == bitclkmaster)
dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
else
dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
}
of_node_put(bitclkmaster);
of_node_put(framemaster);
dai->dai_fmt = dai_fmt;
of_node_put(codec_np);
of_node_put(cpu_np);
ret = snd_soc_register_card(&snd_proto);
if (ret && ret != -EPROBE_DEFER)
dev_err(&pdev->dev,
"snd_soc_register_card() failed: %d\n", ret);
return ret;
}
static int snd_proto_remove(struct platform_device *pdev)
{
return snd_soc_unregister_card(&snd_proto);
}
static const struct of_device_id snd_proto_of_match[] = {
{ .compatible = "mikroe,mikroe-proto", },
{},
};
MODULE_DEVICE_TABLE(of, snd_proto_of_match);
static struct platform_driver snd_proto_driver = {
.driver = {
.name = "snd-mikroe-proto",
.of_match_table = snd_proto_of_match,
},
.probe = snd_proto_probe,
.remove = snd_proto_remove,
};
module_platform_driver(snd_proto_driver);
MODULE_AUTHOR("Florian Meier");
MODULE_DESCRIPTION("ASoC Driver for PROTO board (WM8731)");
MODULE_LICENSE("GPL");
|
