1 /* 2 * ASoC simple sound card support 3 * 4 * Copyright (C) 2012 Renesas Solutions Corp. 5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 12 #include <linux/platform_device.h> 13 #include <linux/module.h> 14 #include <sound/simple_card.h> 15 16 #define asoc_simple_get_card_info(p) \ 17 container_of(p->dai_link, struct asoc_simple_card_info, snd_link) 18 19 static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai, 20 struct asoc_simple_dai *set, 21 unsigned int daifmt) 22 { 23 int ret = 0; 24 25 daifmt |= set->fmt; 26 27 if (!ret && daifmt) 28 ret = snd_soc_dai_set_fmt(dai, daifmt); 29 30 if (ret == -ENOTSUPP) { 31 dev_dbg(dai->dev, "ASoC: set_fmt is not supported\n"); 32 ret = 0; 33 } 34 35 if (!ret && set->sysclk) 36 ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0); 37 38 return ret; 39 } 40 41 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd) 42 { 43 struct asoc_simple_card_info *info = asoc_simple_get_card_info(rtd); 44 struct snd_soc_dai *codec = rtd->codec_dai; 45 struct snd_soc_dai *cpu = rtd->cpu_dai; 46 unsigned int daifmt = info->daifmt; 47 int ret; 48 49 ret = __asoc_simple_card_dai_init(codec, &info->codec_dai, daifmt); 50 if (ret < 0) 51 return ret; 52 53 ret = __asoc_simple_card_dai_init(cpu, &info->cpu_dai, daifmt); 54 if (ret < 0) 55 return ret; 56 57 return 0; 58 } 59 60 static int asoc_simple_card_probe(struct platform_device *pdev) 61 { 62 struct asoc_simple_card_info *cinfo = pdev->dev.platform_data; 63 struct device *dev = &pdev->dev; 64 65 if (!cinfo) { 66 dev_err(dev, "no info for asoc-simple-card\n"); 67 return -EINVAL; 68 } 69 70 if (!cinfo->name || 71 !cinfo->card || 72 !cinfo->codec || 73 !cinfo->platform || 74 !cinfo->cpu_dai.name || 75 !cinfo->codec_dai.name) { 76 dev_err(dev, "insufficient asoc_simple_card_info settings\n"); 77 return -EINVAL; 78 } 79 80 /* 81 * init snd_soc_dai_link 82 */ 83 cinfo->snd_link.name = cinfo->name; 84 cinfo->snd_link.stream_name = cinfo->name; 85 cinfo->snd_link.cpu_dai_name = cinfo->cpu_dai.name; 86 cinfo->snd_link.platform_name = cinfo->platform; 87 cinfo->snd_link.codec_name = cinfo->codec; 88 cinfo->snd_link.codec_dai_name = cinfo->codec_dai.name; 89 cinfo->snd_link.init = asoc_simple_card_dai_init; 90 91 /* 92 * init snd_soc_card 93 */ 94 cinfo->snd_card.name = cinfo->card; 95 cinfo->snd_card.owner = THIS_MODULE; 96 cinfo->snd_card.dai_link = &cinfo->snd_link; 97 cinfo->snd_card.num_links = 1; 98 cinfo->snd_card.dev = &pdev->dev; 99 100 return snd_soc_register_card(&cinfo->snd_card); 101 } 102 103 static int asoc_simple_card_remove(struct platform_device *pdev) 104 { 105 struct asoc_simple_card_info *cinfo = pdev->dev.platform_data; 106 107 return snd_soc_unregister_card(&cinfo->snd_card); 108 } 109 110 static struct platform_driver asoc_simple_card = { 111 .driver = { 112 .name = "asoc-simple-card", 113 .owner = THIS_MODULE, 114 }, 115 .probe = asoc_simple_card_probe, 116 .remove = asoc_simple_card_remove, 117 }; 118 119 module_platform_driver(asoc_simple_card); 120 121 MODULE_ALIAS("platform:asoc-simple-card"); 122 MODULE_LICENSE("GPL"); 123 MODULE_DESCRIPTION("ASoC Simple Sound Card"); 124 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); 125