1 /*
2 * arndale_rt5631.c
3 *
4 * Copyright (c) 2014, Insignal Co., Ltd.
5 *
6 * Author: Claude <claude@insginal.co.kr>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 */
13
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/clk.h>
17
18 #include <sound/soc.h>
19 #include <sound/soc-dapm.h>
20 #include <sound/pcm.h>
21 #include <sound/pcm_params.h>
22
23 #include "i2s.h"
24
arndale_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)25 static int arndale_hw_params(struct snd_pcm_substream *substream,
26 struct snd_pcm_hw_params *params)
27 {
28 struct snd_soc_pcm_runtime *rtd = substream->private_data;
29 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
30 struct snd_soc_dai *codec_dai = rtd->codec_dai;
31 int rfs, ret;
32 unsigned long rclk;
33
34 rfs = 256;
35
36 rclk = params_rate(params) * rfs;
37
38 ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
39 0, SND_SOC_CLOCK_OUT);
40 if (ret < 0)
41 return ret;
42
43 ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
44 0, SND_SOC_CLOCK_OUT);
45
46 if (ret < 0)
47 return ret;
48
49 ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk, SND_SOC_CLOCK_OUT);
50 if (ret < 0)
51 return ret;
52
53 return 0;
54 }
55
56 static struct snd_soc_ops arndale_ops = {
57 .hw_params = arndale_hw_params,
58 };
59
60 static struct snd_soc_dai_link arndale_rt5631_dai[] = {
61 {
62 .name = "RT5631 HiFi",
63 .stream_name = "Primary",
64 .codec_dai_name = "rt5631-hifi",
65 .dai_fmt = SND_SOC_DAIFMT_I2S
66 | SND_SOC_DAIFMT_NB_NF
67 | SND_SOC_DAIFMT_CBS_CFS,
68 .ops = &arndale_ops,
69 },
70 };
71
72 static struct snd_soc_card arndale_rt5631 = {
73 .name = "Arndale RT5631",
74 .owner = THIS_MODULE,
75 .dai_link = arndale_rt5631_dai,
76 .num_links = ARRAY_SIZE(arndale_rt5631_dai),
77 };
78
arndale_audio_probe(struct platform_device * pdev)79 static int arndale_audio_probe(struct platform_device *pdev)
80 {
81 int n, ret;
82 struct device_node *np = pdev->dev.of_node;
83 struct snd_soc_card *card = &arndale_rt5631;
84
85 card->dev = &pdev->dev;
86
87 for (n = 0; np && n < ARRAY_SIZE(arndale_rt5631_dai); n++) {
88 if (!arndale_rt5631_dai[n].cpu_dai_name) {
89 arndale_rt5631_dai[n].cpu_of_node = of_parse_phandle(np,
90 "samsung,audio-cpu", n);
91
92 if (!arndale_rt5631_dai[n].cpu_of_node) {
93 dev_err(&pdev->dev,
94 "Property 'samsung,audio-cpu' missing or invalid\n");
95 return -EINVAL;
96 }
97 }
98 if (!arndale_rt5631_dai[n].platform_name)
99 arndale_rt5631_dai[n].platform_of_node =
100 arndale_rt5631_dai[n].cpu_of_node;
101
102 arndale_rt5631_dai[n].codec_name = NULL;
103 arndale_rt5631_dai[n].codec_of_node = of_parse_phandle(np,
104 "samsung,audio-codec", n);
105 if (!arndale_rt5631_dai[0].codec_of_node) {
106 dev_err(&pdev->dev,
107 "Property 'samsung,audio-codec' missing or invalid\n");
108 return -EINVAL;
109 }
110 }
111
112 ret = devm_snd_soc_register_card(card->dev, card);
113
114 if (ret)
115 dev_err(&pdev->dev, "snd_soc_register_card() failed:%d\n", ret);
116
117 return ret;
118 }
119
120 static const struct of_device_id samsung_arndale_rt5631_of_match[] __maybe_unused = {
121 { .compatible = "samsung,arndale-rt5631", },
122 { .compatible = "samsung,arndale-alc5631", },
123 {},
124 };
125 MODULE_DEVICE_TABLE(of, samsung_arndale_rt5631_of_match);
126
127 static struct platform_driver arndale_audio_driver = {
128 .driver = {
129 .name = "arndale-audio",
130 .pm = &snd_soc_pm_ops,
131 .of_match_table = of_match_ptr(samsung_arndale_rt5631_of_match),
132 },
133 .probe = arndale_audio_probe,
134 };
135
136 module_platform_driver(arndale_audio_driver);
137
138 MODULE_AUTHOR("Claude <claude@insignal.co.kr>");
139 MODULE_DESCRIPTION("ALSA SoC Driver for Arndale Board");
140 MODULE_LICENSE("GPL");
141