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31c26a6a TB |
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 | ||
25 | static 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 | ||
36 | static 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 | ||
57 | static 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 | ||
65 | static 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 | ret = devm_snd_soc_register_card(&pdev->dev, card); | |
96 | if (ret) { | |
97 | dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret); | |
98 | return ret; | |
99 | } | |
100 | ||
101 | return ret; | |
102 | } | |
103 | ||
104 | static const struct of_device_id snow_of_match[] = { | |
105 | { .compatible = "google,snow-audio-max98090", }, | |
46aed597 | 106 | { .compatible = "google,snow-audio-max98091", }, |
31c26a6a TB |
107 | { .compatible = "google,snow-audio-max98095", }, |
108 | {}, | |
109 | }; | |
110 | ||
111 | static struct platform_driver snow_driver = { | |
112 | .driver = { | |
113 | .name = "snow-audio", | |
114 | .owner = THIS_MODULE, | |
deeaa686 | 115 | .pm = &snd_soc_pm_ops, |
31c26a6a TB |
116 | .of_match_table = snow_of_match, |
117 | }, | |
118 | .probe = snow_probe, | |
119 | }; | |
120 | ||
121 | module_platform_driver(snow_driver); | |
122 | ||
123 | MODULE_DESCRIPTION("ALSA SoC Audio machine driver for Snow"); | |
124 | MODULE_LICENSE("GPL"); |