1/*
2 * ASoC machine driver for Snow boards
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * version 2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
11 * General Public License for more details.
12 */
13
14#include <linux/module.h>
15#include <linux/platform_device.h>
16#include <linux/of.h>
17#include <linux/of_device.h>
18
19#include <sound/soc.h>
20
21#include "i2s.h"
22
23#define FIN_PLL_RATE		24000000
24
25static struct snd_soc_dai_link snow_dai[] = {
26	{
27		.name = "Primary",
28		.stream_name = "Primary",
29		.codec_dai_name = "HiFi",
30		.dai_fmt = SND_SOC_DAIFMT_I2S |
31				SND_SOC_DAIFMT_NB_NF |
32				SND_SOC_DAIFMT_CBS_CFS,
33	},
34};
35
36static int snow_late_probe(struct snd_soc_card *card)
37{
38	struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
39	struct snd_soc_dai *cpu_dai = card->rtd[0].cpu_dai;
40	int ret;
41
42	/* Set the MCLK rate for the codec */
43	ret = snd_soc_dai_set_sysclk(codec_dai, 0,
44					FIN_PLL_RATE, SND_SOC_CLOCK_IN);
45	if (ret < 0)
46		return ret;
47
48	/* Select I2S Bus clock to set RCLK and BCLK */
49	ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
50					0, SND_SOC_CLOCK_IN);
51	if (ret < 0)
52		return ret;
53
54	return 0;
55}
56
57static struct snd_soc_card snow_snd = {
58	.name = "Snow-I2S",
59	.owner = THIS_MODULE,
60	.dai_link = snow_dai,
61	.num_links = ARRAY_SIZE(snow_dai),
62
63	.late_probe = snow_late_probe,
64};
65
66static int snow_probe(struct platform_device *pdev)
67{
68	struct snd_soc_card *card = &snow_snd;
69	struct device_node *i2s_node, *codec_node;
70	int i, ret;
71
72	i2s_node = of_parse_phandle(pdev->dev.of_node,
73				    "samsung,i2s-controller", 0);
74	if (!i2s_node) {
75		dev_err(&pdev->dev,
76			"Property 'i2s-controller' missing or invalid\n");
77		return -EINVAL;
78	}
79
80	codec_node = of_parse_phandle(pdev->dev.of_node,
81				      "samsung,audio-codec", 0);
82	if (!codec_node) {
83		dev_err(&pdev->dev,
84			"Property 'audio-codec' missing or invalid\n");
85		return -EINVAL;
86	}
87
88	for (i = 0; i < ARRAY_SIZE(snow_dai); i++) {
89		snow_dai[i].codec_of_node = codec_node;
90		snow_dai[i].cpu_of_node = i2s_node;
91		snow_dai[i].platform_of_node = i2s_node;
92	}
93
94	card->dev = &pdev->dev;
95
96	/* Update card-name if provided through DT, else use default name */
97	snd_soc_of_parse_card_name(card, "samsung,model");
98
99	ret = devm_snd_soc_register_card(&pdev->dev, card);
100	if (ret) {
101		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
102		return ret;
103	}
104
105	return ret;
106}
107
108static const struct of_device_id snow_of_match[] = {
109	{ .compatible = "google,snow-audio-max98090", },
110	{ .compatible = "google,snow-audio-max98091", },
111	{ .compatible = "google,snow-audio-max98095", },
112	{},
113};
114MODULE_DEVICE_TABLE(of, snow_of_match);
115
116static struct platform_driver snow_driver = {
117	.driver = {
118		.name = "snow-audio",
119		.pm = &snd_soc_pm_ops,
120		.of_match_table = snow_of_match,
121	},
122	.probe = snow_probe,
123};
124
125module_platform_driver(snow_driver);
126
127MODULE_DESCRIPTION("ALSA SoC Audio machine driver for Snow");
128MODULE_LICENSE("GPL");
129