LXR linux/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
  25struct pcm030_audio_data {
  26        struct snd_soc_card *card;
  27        struct platform_device *codec_device;
  28};
  29
  30static 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
  47static 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
  54static 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
 105static 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
 116static const struct of_device_id pcm030_audio_match[] = {
 117        { .compatible = "phytec,pcm030-audio-fabric", },
 118        {}
 119};
 120MODULE_DEVICE_TABLE(of, pcm030_audio_match);
 121
 122static 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
 131module_platform_driver(pcm030_fabric_driver);
 132
 133
 134MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>");
 135MODULE_DESCRIPTION(DRV_NAME ": mpc5200 pcm030 fabric driver");
 136MODULE_LICENSE("GPL");
 137
 138