1 /* 2 * Phytec pcm030 driver for the PSC of the Freescale MPC52xx 3 * configured as AC97 interface 4 * 5 * Copyright 2008 Jon Smirl, Digispeaker 6 * Author: Jon Smirl <jonsmirl@gmail.com> 7 * 8 * This file is licensed under the terms of the GNU General Public License 9 * version 2. This program is licensed "as is" without any warranty of any 10 * kind, whether express or implied. 11 */ 12 13 #include <linux/init.h> 14 #include <linux/module.h> 15 #include <linux/device.h> 16 #include <linux/of_device.h> 17 #include <linux/of_platform.h> 18 19 #include <sound/soc.h> 20 21 #include "mpc5200_dma.h" 22 23 #define DRV_NAME "pcm030-audio-fabric" 24 25 struct pcm030_audio_data { 26 struct snd_soc_card *card; 27 struct platform_device *codec_device; 28 }; 29 30 static struct snd_soc_dai_link pcm030_fabric_dai[] = { 31 { 32 .name = "AC97.0", 33 .stream_name = "AC97 Analog", 34 .codec_dai_name = "wm9712-hifi", 35 .cpu_dai_name = "mpc5200-psc-ac97.0", 36 .codec_name = "wm9712-codec", 37 }, 38 { 39 .name = "AC97.1", 40 .stream_name = "AC97 IEC958", 41 .codec_dai_name = "wm9712-aux", 42 .cpu_dai_name = "mpc5200-psc-ac97.1", 43 .codec_name = "wm9712-codec", 44 }, 45 }; 46 47 static struct snd_soc_card pcm030_card = { 48 .name = "pcm030", 49 .owner = THIS_MODULE, 50 .dai_link = pcm030_fabric_dai, 51 .num_links = ARRAY_SIZE(pcm030_fabric_dai), 52 }; 53 54 static int pcm030_fabric_probe(struct platform_device *op) 55 { 56 struct device_node *np = op->dev.of_node; 57 struct device_node *platform_np; 58 struct snd_soc_card *card = &pcm030_card; 59 struct pcm030_audio_data *pdata; 60 int ret; 61 int i; 62 63 if (!of_machine_is_compatible("phytec,pcm030")) 64 return -ENODEV; 65 66 pdata = devm_kzalloc(&op->dev, sizeof(struct pcm030_audio_data), 67 GFP_KERNEL); 68 if (!pdata) 69 return -ENOMEM; 70 71 card->dev = &op->dev; 72 73 pdata->card = card; 74 75 platform_np = of_parse_phandle(np, "asoc-platform", 0); 76 if (!platform_np) { 77 dev_err(&op->dev, "ac97 not registered\n"); 78 return -ENODEV; 79 } 80 81 for (i = 0; i < card->num_links; i++) 82 card->dai_link[i].platform_of_node = platform_np; 83 84 ret = request_module("snd-soc-wm9712"); 85 if (ret) 86 dev_err(&op->dev, "request_module returned: %d\n", ret); 87 88 pdata->codec_device = platform_device_alloc("wm9712-codec", -1); 89 if (!pdata->codec_device) 90 dev_err(&op->dev, "platform_device_alloc() failed\n"); 91 92 ret = platform_device_add(pdata->codec_device); 93 if (ret) 94 dev_err(&op->dev, "platform_device_add() failed: %d\n", ret); 95 96 ret = snd_soc_register_card(card); 97 if (ret) 98 dev_err(&op->dev, "snd_soc_register_card() failed: %d\n", ret); 99 100 platform_set_drvdata(op, pdata); 101 102 return ret; 103 } 104 105 static int pcm030_fabric_remove(struct platform_device *op) 106 { 107 struct pcm030_audio_data *pdata = platform_get_drvdata(op); 108 int ret; 109 110 ret = snd_soc_unregister_card(pdata->card); 111 platform_device_unregister(pdata->codec_device); 112 113 return ret; 114 } 115 116 static const struct of_device_id pcm030_audio_match[] = { 117 { .compatible = "phytec,pcm030-audio-fabric", }, 118 {} 119 }; 120 MODULE_DEVICE_TABLE(of, pcm030_audio_match); 121 122 static struct platform_driver pcm030_fabric_driver = { 123 .probe = pcm030_fabric_probe, 124 .remove = pcm030_fabric_remove, 125 .driver = { 126 .name = DRV_NAME, 127 .of_match_table = pcm030_audio_match, 128 }, 129 }; 130 131 module_platform_driver(pcm030_fabric_driver); 132 133 134 MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>"); 135 MODULE_DESCRIPTION(DRV_NAME ": mpc5200 pcm030 fabric driver"); 136 MODULE_LICENSE("GPL"); 137 138