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9#include <linux/module.h>
10#include <linux/platform_device.h>
11
12#include <sound/core.h>
13#include <sound/pcm.h>
14#include <sound/soc.h>
15#include <sound/jack.h>
16
17#include "../codecs/wm8731.h"
18
19#define XTAL_RATE 12288000
20
21static int snd_proto_init(struct snd_soc_pcm_runtime *rtd)
22{
23 struct snd_soc_card *card = rtd->card;
24 struct snd_soc_dai *codec_dai = rtd->codec_dai;
25
26
27 int ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
28 XTAL_RATE, SND_SOC_CLOCK_IN);
29 if (ret < 0) {
30 dev_err(card->dev, "Failed to set WM8731 SYSCLK: %d\n",
31 ret);
32 return ret;
33 }
34
35 return 0;
36}
37
38static const struct snd_soc_dapm_widget snd_proto_widget[] = {
39 SND_SOC_DAPM_MIC("Microphone Jack", NULL),
40 SND_SOC_DAPM_HP("Headphone Jack", NULL),
41};
42
43static const struct snd_soc_dapm_route snd_proto_route[] = {
44
45 {"Headphone Jack", NULL, "LHPOUT"},
46 {"Headphone Jack", NULL, "RHPOUT"},
47
48
49 {"MICIN", NULL, "Mic Bias"},
50 {"Mic Bias", NULL, "Microphone Jack"},
51};
52
53
54static struct snd_soc_card snd_proto = {
55 .name = "snd_mikroe_proto",
56 .owner = THIS_MODULE,
57 .dapm_widgets = snd_proto_widget,
58 .num_dapm_widgets = ARRAY_SIZE(snd_proto_widget),
59 .dapm_routes = snd_proto_route,
60 .num_dapm_routes = ARRAY_SIZE(snd_proto_route),
61};
62
63static int snd_proto_probe(struct platform_device *pdev)
64{
65 struct snd_soc_dai_link *dai;
66 struct device_node *np = pdev->dev.of_node;
67 struct device_node *codec_np, *cpu_np;
68 struct device_node *bitclkmaster = NULL;
69 struct device_node *framemaster = NULL;
70 unsigned int dai_fmt;
71 int ret = 0;
72
73 if (!np) {
74 dev_err(&pdev->dev, "No device node supplied\n");
75 return -EINVAL;
76 }
77
78 snd_proto.dev = &pdev->dev;
79 ret = snd_soc_of_parse_card_name(&snd_proto, "model");
80 if (ret)
81 return ret;
82
83 dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);
84 if (!dai)
85 return -ENOMEM;
86
87 snd_proto.dai_link = dai;
88 snd_proto.num_links = 1;
89
90 dai->name = "WM8731";
91 dai->stream_name = "WM8731 HiFi";
92 dai->codec_dai_name = "wm8731-hifi";
93 dai->init = &snd_proto_init;
94
95 codec_np = of_parse_phandle(np, "audio-codec", 0);
96 if (!codec_np) {
97 dev_err(&pdev->dev, "audio-codec node missing\n");
98 return -EINVAL;
99 }
100 dai->codec_of_node = codec_np;
101
102 cpu_np = of_parse_phandle(np, "i2s-controller", 0);
103 if (!cpu_np) {
104 dev_err(&pdev->dev, "i2s-controller missing\n");
105 return -EINVAL;
106 }
107 dai->cpu_of_node = cpu_np;
108 dai->platform_of_node = cpu_np;
109
110 dai_fmt = snd_soc_of_parse_daifmt(np, NULL,
111 &bitclkmaster, &framemaster);
112 if (bitclkmaster != framemaster) {
113 dev_err(&pdev->dev, "Must be the same bitclock and frame master\n");
114 return -EINVAL;
115 }
116 if (bitclkmaster) {
117 dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
118 if (codec_np == bitclkmaster)
119 dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
120 else
121 dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
122 }
123 of_node_put(bitclkmaster);
124 of_node_put(framemaster);
125 dai->dai_fmt = dai_fmt;
126
127 of_node_put(codec_np);
128 of_node_put(cpu_np);
129
130 ret = snd_soc_register_card(&snd_proto);
131 if (ret && ret != -EPROBE_DEFER)
132 dev_err(&pdev->dev,
133 "snd_soc_register_card() failed: %d\n", ret);
134
135 return ret;
136}
137
138static int snd_proto_remove(struct platform_device *pdev)
139{
140 return snd_soc_unregister_card(&snd_proto);
141}
142
143static const struct of_device_id snd_proto_of_match[] = {
144 { .compatible = "mikroe,mikroe-proto", },
145 {},
146};
147MODULE_DEVICE_TABLE(of, snd_proto_of_match);
148
149static struct platform_driver snd_proto_driver = {
150 .driver = {
151 .name = "snd-mikroe-proto",
152 .of_match_table = snd_proto_of_match,
153 },
154 .probe = snd_proto_probe,
155 .remove = snd_proto_remove,
156};
157
158module_platform_driver(snd_proto_driver);
159
160MODULE_AUTHOR("Florian Meier");
161MODULE_DESCRIPTION("ASoC Driver for PROTO board (WM8731)");
162MODULE_LICENSE("GPL");
163
