sound/soc/fsl/pcm030-audio-fabric.c

   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         platform_set_drvdata(op, pdata);
  73
  74         pdata->card = card;
  75
  76         platform_np = of_parse_phandle(np, "asoc-platform", 0);
  77         if (!platform_np) {
  78                 dev_err(&op->dev, "ac97 not registered\n");
  79                 return -ENODEV;
  80         }
  81
  82         for (i = 0; i < card->num_links; i++)
  83                 card->dai_link[i].platform_of_node = platform_np;
  84
  85         ret = request_module("snd-soc-wm9712");
  86         if (ret)
  87                 dev_err(&op->dev, "request_module returned: %d\n", ret);
  88
  89         pdata->codec_device = platform_device_alloc("wm9712-codec", -1);
  90         if (!pdata->codec_device)
  91                 dev_err(&op->dev, "platform_device_alloc() failed\n");
  92
  93         ret = platform_device_add(pdata->codec_device);
  94         if (ret)
  95                 dev_err(&op->dev, "platform_device_add() failed: %d\n", ret);
  96
  97         ret = snd_soc_register_card(card);
  98         if (ret)
  99                 dev_err(&op->dev, "snd_soc_register_card() failed: %d\n", ret);
 100
 101         return ret;
 102 }
 103
 104 static int pcm030_fabric_remove(struct platform_device *op)
 105 {
 106         struct pcm030_audio_data *pdata = platform_get_drvdata(op);
 107         int ret;
 108
 109         ret = snd_soc_unregister_card(pdata->card);
 110         platform_device_unregister(pdata->codec_device);
 111
 112         return ret;
 113 }
 114
 115 static struct of_device_id pcm030_audio_match[] = {
 116         { .compatible = "phytec,pcm030-audio-fabric", },
 117         {}
 118 };
 119 MODULE_DEVICE_TABLE(of, pcm030_audio_match);
 120
 121 static struct platform_driver pcm030_fabric_driver = {
 122         .probe          = pcm030_fabric_probe,
 123         .remove         = pcm030_fabric_remove,
 124         .driver         = {
 125                 .name   = DRV_NAME,
 126                 .owner  = THIS_MODULE,
 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