sound/soc/codecs/dw-hdmi-audio.c

   1 /*
   2  * dw-hdmi-audio.c
   3  *
   4  * DesignerWare ALSA SoC Codec driver for DW HDMI audio.
   5  * Copyright (c) 2016 Fuzhou Rockchip Electronics Co., Ltd
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms and conditions of the GNU General Public License,
   9  * version 2, as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.*
  18  *
  19  */
  20 #include <linux/init.h>
  21 #include <linux/module.h>
  22 #include <linux/device.h>
  23 #include <sound/pcm.h>
  24 #include <sound/soc.h>
  25 #include <sound/core.h>
  26 #include <sound/initval.h>
  27 #include <sound/pcm_params.h>
  28 #include "../../../drivers/video/rockchip/hdmi/rockchip-hdmi.h"
  29
  30 static int snd_dw_hdmi_dai_hw_params(struct snd_pcm_substream *substream,
  31                                      struct snd_pcm_hw_params *params,
  32                                      struct snd_soc_dai *codec_dai)
  33 {
  34         return snd_config_hdmi_audio(params);
  35 }
  36
  37 static const struct snd_soc_dapm_widget snd_dw_hdmi_audio_widgets[] = {
  38         SND_SOC_DAPM_OUTPUT("TX"),
  39 };
  40
  41 static const struct snd_soc_dapm_route snd_dw_hdmi_audio_routes[] = {
  42         { "TX", NULL, "Playback" },
  43 };
  44
  45 static const struct snd_soc_dai_ops dw_hdmi_dai_ops = {
  46         .hw_params = snd_dw_hdmi_dai_hw_params,
  47 };
  48
  49 static struct snd_soc_dai_driver dw_hdmi_audio_dai = {
  50         .name = "dw-hdmi-hifi",
  51         .playback = {
  52                 .stream_name = "Playback",
  53                 .channels_min = 2,
  54                 .channels_max = 8,
  55                 .rates = SNDRV_PCM_RATE_32000 |
  56                          SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
  57                          SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
  58                          SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
  59                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
  60         },
  61         .ops = &dw_hdmi_dai_ops,
  62 };
  63
  64 static const struct snd_soc_codec_driver dw_hdmi_audio = {
  65         .dapm_widgets = snd_dw_hdmi_audio_widgets,
  66         .num_dapm_widgets = ARRAY_SIZE(snd_dw_hdmi_audio_widgets),
  67         .dapm_routes = snd_dw_hdmi_audio_routes,
  68         .num_dapm_routes = ARRAY_SIZE(snd_dw_hdmi_audio_routes),
  69 };
  70
  71 static int dw_hdmi_audio_probe(struct platform_device *pdev)
  72 {
  73         int ret;
  74
  75         ret = snd_soc_register_codec(&pdev->dev, &dw_hdmi_audio,
  76                                      &dw_hdmi_audio_dai, 1);
  77         if (ret)
  78                 dev_err(&pdev->dev, "register codec failed (%d)\n", ret);
  79
  80         return ret;
  81 }
  82
  83 static int dw_hdmi_audio_remove(struct platform_device *pdev)
  84 {
  85         snd_soc_unregister_codec(&pdev->dev);
  86
  87         return 0;
  88 }
  89
  90 static const struct of_device_id dw_hdmi_audio_ids[] = {
  91         { .compatible = "dw-hdmi-audio", },
  92         { }
  93 };
  94
  95 static struct platform_driver dw_hdmi_audio_driver = {
  96         .driver = {
  97                 .name = "dw-hdmi-audio",
  98                 .of_match_table = of_match_ptr(dw_hdmi_audio_ids),
  99         },
 100         .probe = dw_hdmi_audio_probe,
 101         .remove = dw_hdmi_audio_remove,
 102 };
 103 module_platform_driver(dw_hdmi_audio_driver);
 104
 105 MODULE_AUTHOR("Sugar Zhang <sugar.zhang@rock-chips.com>");
 106 MODULE_DESCRIPTION("DW HDMI Audio ASoC Interface");
 107 MODULE_LICENSE("GPL");