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	.dai_link = snow_dai,
60	.num_links = ARRAY_SIZE(snow_dai),
61
62	.late_probe = snow_late_probe,
63};
64
65static int snow_probe(struct platform_device *pdev)
66{
67	struct snd_soc_card *card = &snow_snd;
68	struct device_node *i2s_node, *codec_node;
69	int i, ret;
70
71	i2s_node = of_parse_phandle(pdev->dev.of_node,
72				    "samsung,i2s-controller", 0);
73	if (!i2s_node) {
74		dev_err(&pdev->dev,
75			"Property 'i2s-controller' missing or invalid\n");
76		return -EINVAL;
77	}
78
79	codec_node = of_parse_phandle(pdev->dev.of_node,
80				      "samsung,audio-codec", 0);
81	if (!codec_node) {
82		dev_err(&pdev->dev,
83			"Property 'audio-codec' missing or invalid\n");
84		return -EINVAL;
85	}
86
87	for (i = 0; i < ARRAY_SIZE(snow_dai); i++) {
88		snow_dai[i].codec_of_node = codec_node;
89		snow_dai[i].cpu_of_node = i2s_node;
90		snow_dai[i].platform_of_node = i2s_node;
91	}
92
93	card->dev = &pdev->dev;
94
95	/* Update card-name if provided through DT, else use default name */
96	snd_soc_of_parse_card_name(card, "samsung,model");
97
98	ret = devm_snd_soc_register_card(&pdev->dev, card);
99	if (ret) {
100		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
101		return ret;
102	}
103
104	return ret;
105}
106
107static const struct of_device_id snow_of_match[] = {
108	{ .compatible = "google,snow-audio-max98090", },
109	{ .compatible = "google,snow-audio-max98091", },
110	{ .compatible = "google,snow-audio-max98095", },
111	{},
112};
113MODULE_DEVICE_TABLE(of, snow_of_match);
114
115static struct platform_driver snow_driver = {
116	.driver = {
117		.name = "snow-audio",
118		.pm = &snd_soc_pm_ops,
119		.of_match_table = snow_of_match,
120	},
121	.probe = snow_probe,
122};
123
124module_platform_driver(snow_driver);
125
126MODULE_DESCRIPTION("ALSA SoC Audio machine driver for Snow");
127MODULE_LICENSE("GPL");
128