Tushar Behera | 31c26a6 | 2014-04-28 10:14:39 +0530 | [diff] [blame] | 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", }, |
| 106 | { .compatible = "google,snow-audio-max98095", }, |
| 107 | {}, |
| 108 | }; |
| 109 | |
| 110 | static struct platform_driver snow_driver = { |
| 111 | .driver = { |
| 112 | .name = "snow-audio", |
| 113 | .owner = THIS_MODULE, |
Tushar Behera | deeaa68 | 2014-05-14 08:49:06 +0530 | [diff] [blame] | 114 | .pm = &snd_soc_pm_ops, |
Tushar Behera | 31c26a6 | 2014-04-28 10:14:39 +0530 | [diff] [blame] | 115 | .of_match_table = snow_of_match, |
| 116 | }, |
| 117 | .probe = snow_probe, |
| 118 | }; |
| 119 | |
| 120 | module_platform_driver(snow_driver); |
| 121 | |
| 122 | MODULE_DESCRIPTION("ALSA SoC Audio machine driver for Snow"); |
| 123 | MODULE_LICENSE("GPL"); |