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 * Revision history 13 * 25th Sep 2008 Initial version. 14 */ 15 16 #include <linux/init.h> 17 #include <linux/module.h> 18 #include <linux/version.h> 19 #include <linux/kernel.h> 20 #include <linux/device.h> 21 #include <sound/core.h> 22 #include <sound/pcm.h> 23 #include <sound/ac97_codec.h> 24 #include <sound/initval.h> 25 #include <sound/soc.h> 26 27 #include "ad73311.h" 28 29 struct snd_soc_dai ad73311_dai = { 30 .name = "AD73311", 31 .playback = { 32 .stream_name = "Playback", 33 .channels_min = 1, 34 .channels_max = 1, 35 .rates = SNDRV_PCM_RATE_8000, 36 .formats = SNDRV_PCM_FMTBIT_S16_LE, }, 37 .capture = { 38 .stream_name = "Capture", 39 .channels_min = 1, 40 .channels_max = 1, 41 .rates = SNDRV_PCM_RATE_8000, 42 .formats = SNDRV_PCM_FMTBIT_S16_LE, }, 43 }; 44 EXPORT_SYMBOL_GPL(ad73311_dai); 45 46 static int ad73311_soc_probe(struct platform_device *pdev) 47 { 48 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 49 struct snd_soc_codec *codec; 50 int ret = 0; 51 52 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); 53 if (codec == NULL) 54 return -ENOMEM; 55 mutex_init(&codec->mutex); 56 codec->name = "AD73311"; 57 codec->owner = THIS_MODULE; 58 codec->dai = &ad73311_dai; 59 codec->num_dai = 1; 60 socdev->codec = codec; 61 INIT_LIST_HEAD(&codec->dapm_widgets); 62 INIT_LIST_HEAD(&codec->dapm_paths); 63 64 /* register pcms */ 65 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 66 if (ret < 0) { 67 printk(KERN_ERR "ad73311: failed to create pcms\n"); 68 goto pcm_err; 69 } 70 71 ret = snd_soc_register_card(socdev); 72 if (ret < 0) { 73 printk(KERN_ERR "ad73311: failed to register card\n"); 74 goto register_err; 75 } 76 77 return ret; 78 79 register_err: 80 snd_soc_free_pcms(socdev); 81 pcm_err: 82 kfree(socdev->codec); 83 socdev->codec = NULL; 84 return ret; 85 } 86 87 static int ad73311_soc_remove(struct platform_device *pdev) 88 { 89 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 90 struct snd_soc_codec *codec = socdev->codec; 91 92 if (codec == NULL) 93 return 0; 94 snd_soc_free_pcms(socdev); 95 kfree(codec); 96 return 0; 97 } 98 99 struct snd_soc_codec_device soc_codec_dev_ad73311 = { 100 .probe = ad73311_soc_probe, 101 .remove = ad73311_soc_remove, 102 }; 103 EXPORT_SYMBOL_GPL(soc_codec_dev_ad73311); 104 105 MODULE_DESCRIPTION("ASoC ad73311 driver"); 106 MODULE_AUTHOR("Cliff Cai "); 107 MODULE_LICENSE("GPL"); 108