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
25static 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
56static struct snd_soc_ops arndale_ops = {
57	.hw_params = arndale_hw_params,
58};
59
60static 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
72static 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
79static 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
120static const struct of_device_id samsung_arndale_rt5631_of_match[] __maybe_unused = {
121	{ .compatible = "samsung,arndale-rt5631", },
122	{ .compatible = "samsung,arndale-alc5631", },
123	{},
124};
125MODULE_DEVICE_TABLE(of, samsung_arndale_rt5631_of_match);
126
127static 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
136module_platform_driver(arndale_audio_driver);
137
138MODULE_AUTHOR("Claude <claude@insignal.co.kr>");
139MODULE_DESCRIPTION("ALSA SoC Driver for Arndale Board");
140MODULE_LICENSE("GPL");
141