1 /*
2  * Copyright (C) 2014 Marvell
3  *
4  * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License as
8  * published by the Free Software Foundation; either version 2 of the
9  * License, or (at your option) any later version.
10  */
11 
12 #include <linux/module.h>
13 #include <linux/moduleparam.h>
14 #include <linux/interrupt.h>
15 #include <linux/platform_device.h>
16 #include <linux/slab.h>
17 #include <sound/soc.h>
18 #include <linux/of.h>
19 #include <linux/platform_data/asoc-kirkwood.h>
20 #include "../codecs/cs42l51.h"
21 
22 static int a370db_hw_params(struct snd_pcm_substream *substream,
23 			    struct snd_pcm_hw_params *params)
24 {
25 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
26 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
27 	unsigned int freq;
28 
29 	switch (params_rate(params)) {
30 	default:
31 	case 44100:
32 		freq = 11289600;
33 		break;
34 	case 48000:
35 		freq = 12288000;
36 		break;
37 	case 96000:
38 		freq = 24576000;
39 		break;
40 	}
41 
42 	return snd_soc_dai_set_sysclk(codec_dai, 0, freq, SND_SOC_CLOCK_IN);
43 }
44 
45 static struct snd_soc_ops a370db_ops = {
46 	.hw_params = a370db_hw_params,
47 };
48 
49 static const struct snd_soc_dapm_widget a370db_dapm_widgets[] = {
50 	SND_SOC_DAPM_HP("Out Jack", NULL),
51 	SND_SOC_DAPM_LINE("In Jack", NULL),
52 };
53 
54 static const struct snd_soc_dapm_route a370db_route[] = {
55 	{ "Out Jack",	NULL,	"HPL" },
56 	{ "Out Jack",	NULL,	"HPR" },
57 	{ "AIN1L",	NULL,	"In Jack" },
58 	{ "AIN1L",	NULL,	"In Jack" },
59 };
60 
61 static struct snd_soc_dai_link a370db_dai[] = {
62 {
63 	.name = "CS42L51",
64 	.stream_name = "analog",
65 	.cpu_dai_name = "i2s",
66 	.codec_dai_name = "cs42l51-hifi",
67 	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS,
68 	.ops = &a370db_ops,
69 },
70 };
71 
72 static struct snd_soc_card a370db = {
73 	.name = "a370db",
74 	.owner = THIS_MODULE,
75 	.dai_link = a370db_dai,
76 	.num_links = ARRAY_SIZE(a370db_dai),
77 	.dapm_widgets = a370db_dapm_widgets,
78 	.num_dapm_widgets = ARRAY_SIZE(a370db_dapm_widgets),
79 	.dapm_routes = a370db_route,
80 	.num_dapm_routes = ARRAY_SIZE(a370db_route),
81 };
82 
83 static int a370db_probe(struct platform_device *pdev)
84 {
85 	struct snd_soc_card *card = &a370db;
86 
87 	card->dev = &pdev->dev;
88 
89 	a370db_dai[0].cpu_of_node =
90 		of_parse_phandle(pdev->dev.of_node,
91 				 "marvell,audio-controller", 0);
92 	a370db_dai[0].platform_of_node = a370db_dai[0].cpu_of_node;
93 
94 	a370db_dai[0].codec_of_node =
95 		of_parse_phandle(pdev->dev.of_node,
96 				 "marvell,audio-codec", 0);
97 
98 	return devm_snd_soc_register_card(card->dev, card);
99 }
100 
101 static const struct of_device_id a370db_dt_ids[] = {
102 	{ .compatible = "marvell,a370db-audio" },
103 	{ },
104 };
105 
106 static struct platform_driver a370db_driver = {
107 	.driver		= {
108 		.name	= "a370db-audio",
109 		.owner	= THIS_MODULE,
110 		.of_match_table = of_match_ptr(a370db_dt_ids),
111 	},
112 	.probe		= a370db_probe,
113 };
114 
115 module_platform_driver(a370db_driver);
116 
117 MODULE_AUTHOR("Thomas Petazzoni <thomas.petazzoni@free-electrons.com>");
118 MODULE_DESCRIPTION("ALSA SoC a370db audio client");
119 MODULE_LICENSE("GPL");
120 MODULE_ALIAS("platform:a370db-audio");
121