sound/soc/codecs/hdmi_i2s.c

   1 /*
   2  * hdmi_i2s.c  --  HDMI i2s audio for rockchip
   3  *
   4  * Copyright 2013 Rockship
   5  * Author: chenjq <chenjq@rock-chips.com>
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/moduleparam.h>
  10 #include <linux/slab.h>
  11 #include <linux/of.h>
  12 #include <linux/of_gpio.h>
  13 #include <sound/soc.h>
  14 #include <sound/pcm.h>
  15 #include <sound/initval.h>
  16
  17 #if 0
  18 #define DBG(x...) printk(KERN_INFO "hdmi i2s:"x)
  19 #else
  20 #define DBG(x...) do { } while (0)
  21 #endif
  22
  23 struct snd_soc_dai_driver hdmi_i2s_dai = {
  24         .name = "rk-hdmi-i2s-hifi",
  25         .playback = {
  26                 .stream_name = "HiFi Playback",
  27                 .channels_min = 2,
  28                 .channels_max = 2,
  29                 .rates = (SNDRV_PCM_RATE_32000 |
  30                         SNDRV_PCM_RATE_44100 |
  31                         SNDRV_PCM_RATE_48000 |
  32                         SNDRV_PCM_RATE_96000 |
  33                         SNDRV_PCM_RATE_192000),
  34                 .formats = (SNDRV_PCM_FMTBIT_S16_LE |
  35                         SNDRV_PCM_FMTBIT_S20_3LE |
  36                         SNDRV_PCM_FMTBIT_S24_LE),
  37         },
  38 };
  39
  40 static struct snd_soc_codec_driver soc_codec_dev_hdmi_i2s;
  41
  42 static int rockchip_hdmi_i2s_audio_probe(struct platform_device *pdev)
  43 {
  44         int ret;
  45
  46         //set dev name to driver->name for sound card register
  47         dev_set_name(&pdev->dev, "%s", pdev->dev.driver->name);
  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                 printk("%s() register card failed:%d\n", __FUNCTION__, 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                 .owner  = THIS_MODULE,
  78                 .of_match_table = of_match_ptr(rockchip_hdmi_i2s_of_match),
  79         },
  80         .probe          = rockchip_hdmi_i2s_audio_probe,
  81         .remove         = rockchip_hdmi_i2s_audio_remove,
  82 };
  83
  84 module_platform_driver(rockchip_hdmi_i2s_audio_driver);
  85
  86 MODULE_DESCRIPTION("HDMI I2S Controller Driver");
  87 MODULE_LICENSE("GPL");
  88 MODULE_ALIAS("platform:hdmi-i2s");