1 /* 2 * ALSA SoC SPDIF DIR (Digital Interface Reciever) driver 3 * 4 * Based on ALSA SoC SPDIF DIT driver 5 * 6 * This driver is used by controllers which can operate in DIR (SPDI/F) where 7 * no codec is needed. This file provides stub codec that can be used 8 * in these configurations. SPEAr SPDIF IN Audio controller uses this driver. 9 * 10 * Author: Vipin Kumar, <vipin.kumar@st.com> 11 * Copyright: (C) 2012 ST Microelectronics 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License version 2 as 15 * published by the Free Software Foundation. 16 */ 17 18 #include <linux/module.h> 19 #include <linux/moduleparam.h> 20 #include <linux/slab.h> 21 #include <sound/soc.h> 22 #include <sound/pcm.h> 23 #include <sound/initval.h> 24 25 #define STUB_RATES SNDRV_PCM_RATE_8000_192000 26 #define STUB_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ 27 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE) 28 29 static struct snd_soc_codec_driver soc_codec_spdif_dir; 30 31 static struct snd_soc_dai_driver dir_stub_dai = { 32 .name = "dir-hifi", 33 .capture = { 34 .stream_name = "Capture", 35 .channels_min = 1, 36 .channels_max = 384, 37 .rates = STUB_RATES, 38 .formats = STUB_FORMATS, 39 }, 40 }; 41 42 static int spdif_dir_probe(struct platform_device *pdev) 43 { 44 return snd_soc_register_codec(&pdev->dev, &soc_codec_spdif_dir, 45 &dir_stub_dai, 1); 46 } 47 48 static int spdif_dir_remove(struct platform_device *pdev) 49 { 50 snd_soc_unregister_codec(&pdev->dev); 51 return 0; 52 } 53 54 static struct platform_driver spdif_dir_driver = { 55 .probe = spdif_dir_probe, 56 .remove = spdif_dir_remove, 57 .driver = { 58 .name = "spdif-dir", 59 .owner = THIS_MODULE, 60 }, 61 }; 62 63 module_platform_driver(spdif_dir_driver); 64 65 MODULE_DESCRIPTION("ASoC SPDIF DIR driver"); 66 MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>"); 67 MODULE_LICENSE("GPL"); 68