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Linux/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 #include <linux/of_device.h>
 24 
 25 #define DRV_NAME "hdmi-audio-codec"
 26 
 27 static const struct snd_soc_dapm_widget hdmi_widgets[] = {
 28         SND_SOC_DAPM_INPUT("RX"),
 29         SND_SOC_DAPM_OUTPUT("TX"),
 30 };
 31 
 32 static const struct snd_soc_dapm_route hdmi_routes[] = {
 33         { "Capture", NULL, "RX" },
 34         { "TX", NULL, "Playback" },
 35 };
 36 
 37 static struct snd_soc_dai_driver hdmi_codec_dai = {
 38         .name = "hdmi-hifi",
 39         .playback = {
 40                 .stream_name = "Playback",
 41                 .channels_min = 2,
 42                 .channels_max = 8,
 43                 .rates = SNDRV_PCM_RATE_32000 |
 44                         SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
 45                         SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
 46                         SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
 47                 .formats = SNDRV_PCM_FMTBIT_S16_LE |
 48                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
 49         },
 50         .capture = {
 51                 .stream_name = "Capture",
 52                 .channels_min = 2,
 53                 .channels_max = 2,
 54                 .rates = SNDRV_PCM_RATE_32000 |
 55                         SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
 56                         SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
 57                         SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
 58                 .formats = SNDRV_PCM_FMTBIT_S16_LE |
 59                         SNDRV_PCM_FMTBIT_S24_LE,
 60         },
 61 
 62 };
 63 
 64 #ifdef CONFIG_OF
 65 static const struct of_device_id hdmi_audio_codec_ids[] = {
 66         { .compatible = "linux,hdmi-audio", },
 67         { }
 68 };
 69 MODULE_DEVICE_TABLE(of, hdmi_audio_codec_ids);
 70 #endif
 71 
 72 static struct snd_soc_codec_driver hdmi_codec = {
 73         .dapm_widgets = hdmi_widgets,
 74         .num_dapm_widgets = ARRAY_SIZE(hdmi_widgets),
 75         .dapm_routes = hdmi_routes,
 76         .num_dapm_routes = ARRAY_SIZE(hdmi_routes),
 77 };
 78 
 79 static int hdmi_codec_probe(struct platform_device *pdev)
 80 {
 81         return snd_soc_register_codec(&pdev->dev, &hdmi_codec,
 82                         &hdmi_codec_dai, 1);
 83 }
 84 
 85 static int hdmi_codec_remove(struct platform_device *pdev)
 86 {
 87         snd_soc_unregister_codec(&pdev->dev);
 88         return 0;
 89 }
 90 
 91 static struct platform_driver hdmi_codec_driver = {
 92         .driver         = {
 93                 .name   = DRV_NAME,
 94                 .owner  = THIS_MODULE,
 95                 .of_match_table = of_match_ptr(hdmi_audio_codec_ids),
 96         },
 97 
 98         .probe          = hdmi_codec_probe,
 99         .remove         = hdmi_codec_remove,
100 };
101 
102 module_platform_driver(hdmi_codec_driver);
103 
104 MODULE_AUTHOR("Ricardo Neri <ricardo.neri@ti.com>");
105 MODULE_DESCRIPTION("ASoC generic HDMI codec driver");
106 MODULE_LICENSE("GPL");
107 MODULE_ALIAS("platform:" DRV_NAME);
108 

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