1 /* 2 * ad73311.c -- ALSA Soc AD73311 codec support 3 * 4 * Copyright: Analog Device Inc. 5 * Author: Cliff Cai <cliff.cai@analog.com> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2 of the License, or (at your 10 * option) any later version. 11 */ 12 13 #include <linux/init.h> 14 #include <linux/slab.h> 15 #include <linux/module.h> 16 #include <linux/kernel.h> 17 #include <linux/device.h> 18 #include <sound/core.h> 19 #include <sound/pcm.h> 20 #include <sound/ac97_codec.h> 21 #include <sound/initval.h> 22 #include <sound/soc.h> 23 24 #include "ad73311.h" 25 26 struct snd_soc_dai ad73311_dai = { 27 .name = "AD73311", 28 .playback = { 29 .stream_name = "Playback", 30 .channels_min = 1, 31 .channels_max = 1, 32 .rates = SNDRV_PCM_RATE_8000, 33 .formats = SNDRV_PCM_FMTBIT_S16_LE, }, 34 .capture = { 35 .stream_name = "Capture", 36 .channels_min = 1, 37 .channels_max = 1, 38 .rates = SNDRV_PCM_RATE_8000, 39 .formats = SNDRV_PCM_FMTBIT_S16_LE, }, 40 }; 41 EXPORT_SYMBOL_GPL(ad73311_dai); 42 43 static int ad73311_soc_probe(struct platform_device *pdev) 44 { 45 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 46 struct snd_soc_codec *codec; 47 int ret = 0; 48 49 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); 50 if (codec == NULL) 51 return -ENOMEM; 52 mutex_init(&codec->mutex); 53 codec->name = "AD73311"; 54 codec->owner = THIS_MODULE; 55 codec->dai = &ad73311_dai; 56 codec->num_dai = 1; 57 socdev->card->codec = codec; 58 INIT_LIST_HEAD(&codec->dapm_widgets); 59 INIT_LIST_HEAD(&codec->dapm_paths); 60 61 /* register pcms */ 62 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 63 if (ret < 0) { 64 printk(KERN_ERR "ad73311: failed to create pcms\n"); 65 goto pcm_err; 66 } 67 68 return ret; 69 70 pcm_err: 71 kfree(socdev->card->codec); 72 socdev->card->codec = NULL; 73 return ret; 74 } 75 76 static int ad73311_soc_remove(struct platform_device *pdev) 77 { 78 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 79 struct snd_soc_codec *codec = socdev->card->codec; 80 81 if (codec == NULL) 82 return 0; 83 snd_soc_free_pcms(socdev); 84 kfree(codec); 85 return 0; 86 } 87 88 struct snd_soc_codec_device soc_codec_dev_ad73311 = { 89 .probe = ad73311_soc_probe, 90 .remove = ad73311_soc_remove, 91 }; 92 EXPORT_SYMBOL_GPL(soc_codec_dev_ad73311); 93 94 static int __init ad73311_init(void) 95 { 96 return snd_soc_register_dai(&ad73311_dai); 97 } 98 module_init(ad73311_init); 99 100 static void __exit ad73311_exit(void) 101 { 102 snd_soc_unregister_dai(&ad73311_dai); 103 } 104 module_exit(ad73311_exit); 105 106 MODULE_DESCRIPTION("ASoC ad73311 driver"); 107 MODULE_AUTHOR("Cliff Cai "); 108 MODULE_LICENSE("GPL"); 109