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/module.h> 15 #include <linux/kernel.h> 16 #include <linux/device.h> 17 #include <sound/core.h> 18 #include <sound/pcm.h> 19 #include <sound/ac97_codec.h> 20 #include <sound/initval.h> 21 #include <sound/soc.h> 22 23 #include "ad73311.h" 24 25 struct snd_soc_dai ad73311_dai = { 26 .name = "AD73311", 27 .playback = { 28 .stream_name = "Playback", 29 .channels_min = 1, 30 .channels_max = 1, 31 .rates = SNDRV_PCM_RATE_8000, 32 .formats = SNDRV_PCM_FMTBIT_S16_LE, }, 33 .capture = { 34 .stream_name = "Capture", 35 .channels_min = 1, 36 .channels_max = 1, 37 .rates = SNDRV_PCM_RATE_8000, 38 .formats = SNDRV_PCM_FMTBIT_S16_LE, }, 39 }; 40 EXPORT_SYMBOL_GPL(ad73311_dai); 41 42 static int ad73311_soc_probe(struct platform_device *pdev) 43 { 44 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 45 struct snd_soc_codec *codec; 46 int ret = 0; 47 48 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); 49 if (codec == NULL) 50 return -ENOMEM; 51 mutex_init(&codec->mutex); 52 codec->name = "AD73311"; 53 codec->owner = THIS_MODULE; 54 codec->dai = &ad73311_dai; 55 codec->num_dai = 1; 56 socdev->card->codec = codec; 57 INIT_LIST_HEAD(&codec->dapm_widgets); 58 INIT_LIST_HEAD(&codec->dapm_paths); 59 60 /* register pcms */ 61 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 62 if (ret < 0) { 63 printk(KERN_ERR "ad73311: failed to create pcms\n"); 64 goto pcm_err; 65 } 66 67 ret = snd_soc_init_card(socdev); 68 if (ret < 0) { 69 printk(KERN_ERR "ad73311: failed to register card\n"); 70 goto register_err; 71 } 72 73 return ret; 74 75 register_err: 76 snd_soc_free_pcms(socdev); 77 pcm_err: 78 kfree(socdev->card->codec); 79 socdev->card->codec = NULL; 80 return ret; 81 } 82 83 static int ad73311_soc_remove(struct platform_device *pdev) 84 { 85 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 86 struct snd_soc_codec *codec = socdev->card->codec; 87 88 if (codec == NULL) 89 return 0; 90 snd_soc_free_pcms(socdev); 91 kfree(codec); 92 return 0; 93 } 94 95 struct snd_soc_codec_device soc_codec_dev_ad73311 = { 96 .probe = ad73311_soc_probe, 97 .remove = ad73311_soc_remove, 98 }; 99 EXPORT_SYMBOL_GPL(soc_codec_dev_ad73311); 100 101 static int __init ad73311_init(void) 102 { 103 return snd_soc_register_dai(&ad73311_dai); 104 } 105 module_init(ad73311_init); 106 107 static void __exit ad73311_exit(void) 108 { 109 snd_soc_unregister_dai(&ad73311_dai); 110 } 111 module_exit(ad73311_exit); 112 113 MODULE_DESCRIPTION("ASoC ad73311 driver"); 114 MODULE_AUTHOR("Cliff Cai "); 115 MODULE_LICENSE("GPL"); 116