sound/soc/samsung/arndale_rt5631.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // Copyright (c) 2014, Insignal Co., Ltd.
   4 //
   5 //  Author: Claude <claude@insginal.co.kr>
   6
   7 #include <linux/module.h>
   8 #include <linux/of_device.h>
   9 #include <linux/platform_device.h>
  10 #include <linux/clk.h>
  11
  12 #include <sound/soc.h>
  13 #include <sound/soc-dapm.h>
  14 #include <sound/pcm.h>
  15 #include <sound/pcm_params.h>
  16
  17 #include "i2s.h"
  18
  19 static int arndale_hw_params(struct snd_pcm_substream *substream,
  20         struct snd_pcm_hw_params *params)
  21 {
  22         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  23         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  24         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  25         int rfs, ret;
  26         unsigned long rclk;
  27
  28         rfs = 256;
  29
  30         rclk = params_rate(params) * rfs;
  31
  32         ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
  33                                         0, SND_SOC_CLOCK_OUT);
  34         if (ret < 0)
  35                 return ret;
  36
  37         ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
  38                                         0, SND_SOC_CLOCK_OUT);
  39
  40         if (ret < 0)
  41                 return ret;
  42
  43         ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk, SND_SOC_CLOCK_OUT);
  44         if (ret < 0)
  45                 return ret;
  46
  47         return 0;
  48 }
  49
  50 static struct snd_soc_ops arndale_ops = {
  51         .hw_params = arndale_hw_params,
  52 };
  53
  54 SND_SOC_DAILINK_DEFS(rt5631_hifi,
  55         DAILINK_COMP_ARRAY(COMP_EMPTY()),
  56         DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "rt5631-hifi")),
  57         DAILINK_COMP_ARRAY(COMP_EMPTY()));
  58
  59 static struct snd_soc_dai_link arndale_rt5631_dai[] = {
  60         {
  61                 .name = "RT5631 HiFi",
  62                 .stream_name = "Primary",
  63                 .dai_fmt = SND_SOC_DAIFMT_I2S
  64                         | SND_SOC_DAIFMT_NB_NF
  65                         | SND_SOC_DAIFMT_CBS_CFS,
  66                 .ops = &arndale_ops,
  67                 SND_SOC_DAILINK_REG(rt5631_hifi),
  68         },
  69 };
  70
  71 static struct snd_soc_card arndale_rt5631 = {
  72         .name = "Arndale RT5631",
  73         .owner = THIS_MODULE,
  74         .dai_link = arndale_rt5631_dai,
  75         .num_links = ARRAY_SIZE(arndale_rt5631_dai),
  76 };
  77
  78 static void arndale_put_of_nodes(struct snd_soc_card *card)
  79 {
  80         struct snd_soc_dai_link *dai_link;
  81         int i;
  82
  83         for_each_card_prelinks(card, i, dai_link) {
  84                 of_node_put(dai_link->cpus->of_node);
  85                 of_node_put(dai_link->codecs->of_node);
  86         }
  87 }
  88
  89 static int arndale_audio_probe(struct platform_device *pdev)
  90 {
  91         int n, ret;
  92         struct device_node *np = pdev->dev.of_node;
  93         struct snd_soc_card *card = &arndale_rt5631;
  94
  95         card->dev = &pdev->dev;
  96
  97         for (n = 0; np && n < ARRAY_SIZE(arndale_rt5631_dai); n++) {
  98                 if (!arndale_rt5631_dai[n].cpus->dai_name) {
  99                         arndale_rt5631_dai[n].cpus->of_node = of_parse_phandle(np,
 100                                         "samsung,audio-cpu", n);
 101
 102                         if (!arndale_rt5631_dai[n].cpus->of_node) {
 103                                 dev_err(&pdev->dev,
 104                                 "Property 'samsung,audio-cpu' missing or invalid\n");
 105                                 return -EINVAL;
 106                         }
 107                 }
 108                 if (!arndale_rt5631_dai[n].platforms->name)
 109                         arndale_rt5631_dai[n].platforms->of_node =
 110                                         arndale_rt5631_dai[n].cpus->of_node;
 111
 112                 arndale_rt5631_dai[n].codecs->name = NULL;
 113                 arndale_rt5631_dai[n].codecs->of_node = of_parse_phandle(np,
 114                                         "samsung,audio-codec", n);
 115                 if (!arndale_rt5631_dai[0].codecs->of_node) {
 116                         dev_err(&pdev->dev,
 117                         "Property 'samsung,audio-codec' missing or invalid\n");
 118                         ret = -EINVAL;
 119                         goto err_put_of_nodes;
 120                 }
 121         }
 122
 123         ret = devm_snd_soc_register_card(card->dev, card);
 124         if (ret) {
 125                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
 126                 goto err_put_of_nodes;
 127         }
 128         return 0;
 129
 130 err_put_of_nodes:
 131         arndale_put_of_nodes(card);
 132         return ret;
 133 }
 134
 135 static int arndale_audio_remove(struct platform_device *pdev)
 136 {
 137         struct snd_soc_card *card = platform_get_drvdata(pdev);
 138
 139         arndale_put_of_nodes(card);
 140         return 0;
 141 }
 142
 143 static const struct of_device_id samsung_arndale_rt5631_of_match[] __maybe_unused = {
 144         { .compatible = "samsung,arndale-rt5631", },
 145         { .compatible = "samsung,arndale-alc5631", },
 146         {},
 147 };
 148 MODULE_DEVICE_TABLE(of, samsung_arndale_rt5631_of_match);
 149
 150 static struct platform_driver arndale_audio_driver = {
 151         .driver = {
 152                 .name   = "arndale-audio",
 153                 .pm = &snd_soc_pm_ops,
 154                 .of_match_table = of_match_ptr(samsung_arndale_rt5631_of_match),
 155         },
 156         .probe = arndale_audio_probe,
 157         .remove = arndale_audio_remove,
 158 };
 159
 160 module_platform_driver(arndale_audio_driver);
 161
 162 MODULE_AUTHOR("Claude <claude@insignal.co.kr>");
 163 MODULE_DESCRIPTION("ALSA SoC Driver for Arndale Board");
 164 MODULE_LICENSE("GPL");