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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 = asoc_rtd_to_codec(rtd, 0);
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 snd_soc_dai_link_component *comp;
67 struct device_node *np = pdev->dev.of_node;
68 struct device_node *codec_np, *cpu_np;
69 struct device_node *bitclkmaster = NULL;
70 struct device_node *framemaster = NULL;
71 unsigned int dai_fmt;
72 int ret = 0;
73
74 if (!np) {
75 dev_err(&pdev->dev, "No device node supplied\n");
76 return -EINVAL;
77 }
78
79 snd_proto.dev = &pdev->dev;
80 ret = snd_soc_of_parse_card_name(&snd_proto, "model");
81 if (ret)
82 return ret;
83
84 dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);
85 if (!dai)
86 return -ENOMEM;
87
88
89 comp = devm_kzalloc(&pdev->dev, 3 * sizeof(*comp), GFP_KERNEL);
90 if (!comp)
91 return -ENOMEM;
92
93 snd_proto.dai_link = dai;
94 snd_proto.num_links = 1;
95
96 dai->cpus = &comp[0];
97 dai->num_cpus = 1;
98 dai->codecs = &comp[1];
99 dai->num_codecs = 1;
100 dai->platforms = &comp[2];
101 dai->num_platforms = 1;
102
103 dai->name = "WM8731";
104 dai->stream_name = "WM8731 HiFi";
105 dai->codecs->dai_name = "wm8731-hifi";
106 dai->init = &snd_proto_init;
107
108 codec_np = of_parse_phandle(np, "audio-codec", 0);
109 if (!codec_np) {
110 dev_err(&pdev->dev, "audio-codec node missing\n");
111 return -EINVAL;
112 }
113 dai->codecs->of_node = codec_np;
114
115 cpu_np = of_parse_phandle(np, "i2s-controller", 0);
116 if (!cpu_np) {
117 dev_err(&pdev->dev, "i2s-controller missing\n");
118 return -EINVAL;
119 }
120 dai->cpus->of_node = cpu_np;
121 dai->platforms->of_node = cpu_np;
122
123 dai_fmt = snd_soc_daifmt_parse_format(np, NULL);
124 snd_soc_daifmt_parse_clock_provider_as_phandle(np, NULL,
125 &bitclkmaster, &framemaster);
126 if (bitclkmaster != framemaster) {
127 dev_err(&pdev->dev, "Must be the same bitclock and frame master\n");
128 return -EINVAL;
129 }
130 if (bitclkmaster) {
131 if (codec_np == bitclkmaster)
132 dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
133 else
134 dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
135 } else {
136 dai_fmt |= snd_soc_daifmt_parse_clock_provider_as_flag(np, NULL);
137 }
138
139 of_node_put(bitclkmaster);
140 of_node_put(framemaster);
141 dai->dai_fmt = dai_fmt;
142
143 of_node_put(codec_np);
144 of_node_put(cpu_np);
145
146 ret = snd_soc_register_card(&snd_proto);
147 if (ret && ret != -EPROBE_DEFER)
148 dev_err(&pdev->dev,
149 "snd_soc_register_card() failed: %d\n", ret);
150
151 return ret;
152}
153
154static int snd_proto_remove(struct platform_device *pdev)
155{
156 return snd_soc_unregister_card(&snd_proto);
157}
158
159static const struct of_device_id snd_proto_of_match[] = {
160 { .compatible = "mikroe,mikroe-proto", },
161 {},
162};
163MODULE_DEVICE_TABLE(of, snd_proto_of_match);
164
165static struct platform_driver snd_proto_driver = {
166 .driver = {
167 .name = "snd-mikroe-proto",
168 .of_match_table = snd_proto_of_match,
169 },
170 .probe = snd_proto_probe,
171 .remove = snd_proto_remove,
172};
173
174module_platform_driver(snd_proto_driver);
175
176MODULE_AUTHOR("Florian Meier");
177MODULE_DESCRIPTION("ASoC Driver for PROTO board (WM8731)");
178MODULE_LICENSE("GPL");
179
