sound/soc/codecs/hdmi_i2s.c

   1 /*
   2  * hdmi_i2s.c  --  HDMI i2s audio for rockchip
   3  *
   4  * Copyright (C) 2015 Fuzhou Rockchip Electronics Co., Ltd
   5  *
   6  * This software is licensed under the terms of the GNU General Public
   7  * License version 2, as published by the Free Software Foundation, and
   8  * may be copied, distributed, and modified under those terms.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/moduleparam.h>
  19 #include <linux/slab.h>
  20 #include <linux/of.h>
  21 #include <linux/of_gpio.h>
  22 #include <sound/soc.h>
  23 #include <sound/pcm.h>
  24 #include <sound/initval.h>
  25
  26 struct snd_soc_dai_driver hdmi_i2s_dai = {
  27         .name = "rk-hdmi-i2s-hifi",
  28         .playback = {
  29                 .stream_name = "HiFi Playback",
  30                 .channels_min = 2,
  31                 .channels_max = 8,
  32                 .rates = (SNDRV_PCM_RATE_32000 |
  33                           SNDRV_PCM_RATE_44100 |
  34                           SNDRV_PCM_RATE_48000 |
  35                           SNDRV_PCM_RATE_96000 |
  36                           SNDRV_PCM_RATE_192000),
  37                 .formats = (SNDRV_PCM_FMTBIT_S16_LE |
  38                             SNDRV_PCM_FMTBIT_S20_3LE |
  39                             SNDRV_PCM_FMTBIT_S24_LE),
  40         },
  41 };
  42
  43 static struct snd_soc_codec_driver soc_codec_dev_hdmi_i2s;
  44
  45 static int rockchip_hdmi_i2s_audio_probe(struct platform_device *pdev)
  46 {
  47         int ret;
  48
  49         ret = snd_soc_register_codec(&pdev->dev,
  50                                      &soc_codec_dev_hdmi_i2s,
  51                                      &hdmi_i2s_dai, 1);
  52
  53         if (ret)
  54                 dev_err(&pdev->dev, "register card failed: %d\n", ret);
  55
  56         return ret;
  57 }
  58
  59 static int rockchip_hdmi_i2s_audio_remove(struct platform_device *pdev)
  60 {
  61         snd_soc_unregister_codec(&pdev->dev);
  62
  63         return 0;
  64 }
  65
  66 #ifdef CONFIG_OF
  67 static const struct of_device_id rockchip_hdmi_i2s_of_match[] = {
  68         { .compatible = "hdmi-i2s", },
  69         {},
  70 };
  71 MODULE_DEVICE_TABLE(of, rockchip_hdmi_i2s_of_match);
  72 #endif /* CONFIG_OF */
  73
  74 static struct platform_driver rockchip_hdmi_i2s_audio_driver = {
  75         .driver = {
  76                 .name = "hdmi-i2s",
  77                 .of_match_table = of_match_ptr(rockchip_hdmi_i2s_of_match),
  78         },
  79         .probe = rockchip_hdmi_i2s_audio_probe,
  80         .remove = rockchip_hdmi_i2s_audio_remove,
  81 };
  82
  83 module_platform_driver(rockchip_hdmi_i2s_audio_driver);
  84
  85 MODULE_DESCRIPTION("Rockchip HDMI I2S Dummy Driver");
  86 MODULE_LICENSE("GPL");
  87 MODULE_ALIAS("platform:hdmi-i2s");