sound/soc/codecs/hdmi.c

   1 /*
   2  * ALSA SoC codec driver for HDMI audio codecs.
   3  * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
   4  * Author: Ricardo Neri <ricardo.neri@ti.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21 #include <linux/module.h>
  22 #include <sound/soc.h>
  23
  24 #define DRV_NAME "hdmi-audio-codec"
  25
  26 static const struct snd_soc_dapm_widget hdmi_widgets[] = {
  27         SND_SOC_DAPM_INPUT("RX"),
  28         SND_SOC_DAPM_OUTPUT("TX"),
  29 };
  30
  31 static const struct snd_soc_dapm_route hdmi_routes[] = {
  32         { "Capture", NULL, "RX" },
  33         { "TX", NULL, "Playback" },
  34 };
  35
  36 static struct snd_soc_dai_driver hdmi_codec_dai = {
  37         .name = "hdmi-hifi",
  38         .playback = {
  39                 .stream_name = "Playback",
  40                 .channels_min = 2,
  41                 .channels_max = 8,
  42                 .rates = SNDRV_PCM_RATE_32000 |
  43                         SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
  44                         SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
  45                         SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
  46                 .formats = SNDRV_PCM_FMTBIT_S16_LE |
  47                         SNDRV_PCM_FMTBIT_S24_LE,
  48         },
  49         .capture = {
  50                 .stream_name = "Capture",
  51                 .channels_min = 2,
  52                 .channels_max = 2,
  53                 .rates = SNDRV_PCM_RATE_32000 |
  54                         SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
  55                         SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
  56                         SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
  57                 .formats = SNDRV_PCM_FMTBIT_S16_LE |
  58                         SNDRV_PCM_FMTBIT_S24_LE,
  59         },
  60
  61 };
  62
  63 static struct snd_soc_codec_driver hdmi_codec = {
  64         .dapm_widgets = hdmi_widgets,
  65         .num_dapm_widgets = ARRAY_SIZE(hdmi_widgets),
  66         .dapm_routes = hdmi_routes,
  67         .num_dapm_routes = ARRAY_SIZE(hdmi_routes),
  68 };
  69
  70 static int hdmi_codec_probe(struct platform_device *pdev)
  71 {
  72         return snd_soc_register_codec(&pdev->dev, &hdmi_codec,
  73                         &hdmi_codec_dai, 1);
  74 }
  75
  76 static int hdmi_codec_remove(struct platform_device *pdev)
  77 {
  78         snd_soc_unregister_codec(&pdev->dev);
  79         return 0;
  80 }
  81
  82 static struct platform_driver hdmi_codec_driver = {
  83         .driver         = {
  84                 .name   = DRV_NAME,
  85                 .owner  = THIS_MODULE,
  86         },
  87
  88         .probe          = hdmi_codec_probe,
  89         .remove         = hdmi_codec_remove,
  90 };
  91
  92 module_platform_driver(hdmi_codec_driver);
  93
  94 MODULE_AUTHOR("Ricardo Neri <ricardo.neri@ti.com>");
  95 MODULE_DESCRIPTION("ASoC generic HDMI codec driver");
  96 MODULE_LICENSE("GPL");
  97 MODULE_ALIAS("platform:" DRV_NAME);