kernel/sound/soc/samsung/arndale_rt5631.c

   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
  25 static 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
  56 static struct snd_soc_ops arndale_ops = {
  57         .hw_params = arndale_hw_params,
  58 };
  59
  60 static 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
  72 static struct snd_soc_card arndale_rt5631 = {
  73         .name = "Arndale RT5631",
  74         .dai_link = arndale_rt5631_dai,
  75         .num_links = ARRAY_SIZE(arndale_rt5631_dai),
  76 };
  77
  78 static int arndale_audio_probe(struct platform_device *pdev)
  79 {
  80         int n, ret;
  81         struct device_node *np = pdev->dev.of_node;
  82         struct snd_soc_card *card = &arndale_rt5631;
  83
  84         card->dev = &pdev->dev;
  85
  86         for (n = 0; np && n < ARRAY_SIZE(arndale_rt5631_dai); n++) {
  87                 if (!arndale_rt5631_dai[n].cpu_dai_name) {
  88                         arndale_rt5631_dai[n].cpu_of_node = of_parse_phandle(np,
  89                                         "samsung,audio-cpu", n);
  90
  91                         if (!arndale_rt5631_dai[n].cpu_of_node) {
  92                                 dev_err(&pdev->dev,
  93                                 "Property 'samsung,audio-cpu' missing or invalid\n");
  94                                 return -EINVAL;
  95                         }
  96                 }
  97                 if (!arndale_rt5631_dai[n].platform_name)
  98                         arndale_rt5631_dai[n].platform_of_node =
  99                                         arndale_rt5631_dai[n].cpu_of_node;
 100
 101                 arndale_rt5631_dai[n].codec_name = NULL;
 102                 arndale_rt5631_dai[n].codec_of_node = of_parse_phandle(np,
 103                                         "samsung,audio-codec", n);
 104                 if (!arndale_rt5631_dai[0].codec_of_node) {
 105                         dev_err(&pdev->dev,
 106                         "Property 'samsung,audio-codec' missing or invalid\n");
 107                         return -EINVAL;
 108                 }
 109         }
 110
 111         ret = devm_snd_soc_register_card(card->dev, card);
 112
 113         if (ret)
 114                 dev_err(&pdev->dev, "snd_soc_register_card() failed:%d\n", ret);
 115
 116         return ret;
 117 }
 118
 119 static const struct of_device_id samsung_arndale_rt5631_of_match[] __maybe_unused = {
 120         { .compatible = "samsung,arndale-rt5631", },
 121         { .compatible = "samsung,arndale-alc5631", },
 122         {},
 123 };
 124 MODULE_DEVICE_TABLE(of, samsung_arndale_rt5631_of_match);
 125
 126 static struct platform_driver arndale_audio_driver = {
 127         .driver = {
 128                 .name   = "arndale-audio",
 129                 .pm = &snd_soc_pm_ops,
 130                 .of_match_table = of_match_ptr(samsung_arndale_rt5631_of_match),
 131         },
 132         .probe = arndale_audio_probe,
 133 };
 134
 135 module_platform_driver(arndale_audio_driver);
 136
 137 MODULE_AUTHOR("Claude <claude@insignal.co.kr>");
 138 MODULE_DESCRIPTION("ALSA SoC Driver for Arndale Board");
 139 MODULE_LICENSE("GPL");