pcm030-audio-fabric.c

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/*
 * Phytec pcm030 driver for the PSC of the Freescale MPC52xx
 * configured as AC97 interface
 *
 * Copyright 2008 Jon Smirl, Digispeaker
 * Author: Jon Smirl <[email protected]>
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2. This program is licensed "as is" without any warranty of any
 * kind, whether express or implied.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>

#include <sound/soc.h>

#include "mpc5200_dma.h"

#define DRV_NAME "pcm030-audio-fabric"

struct pcm030_audio_data {
    struct snd_soc_card *card;
    struct platform_device *codec_device;
};

static struct snd_soc_dai_link pcm030_fabric_dai[] = {
{
    .name = "AC97",
    .stream_name = "AC97 Analog",
    .codec_dai_name = "wm9712-hifi",
    .cpu_dai_name = "mpc5200-psc-ac97.0",
    .codec_name = "wm9712-codec",
},
{
    .name = "AC97",
    .stream_name = "AC97 IEC958",
    .codec_dai_name = "wm9712-aux",
    .cpu_dai_name = "mpc5200-psc-ac97.1",
    .codec_name = "wm9712-codec",
},
};

static struct snd_soc_card pcm030_card = {
    .name = "pcm030",
    .owner = THIS_MODULE,
    .dai_link = pcm030_fabric_dai,
    .num_links = ARRAY_SIZE(pcm030_fabric_dai),
};

static int __init pcm030_fabric_probe(struct platform_device *op)
{
    struct device_node *np = op->dev.of_node;
    struct device_node *platform_np;
    struct snd_soc_card *card = &pcm030_card;
    struct pcm030_audio_data *pdata;
    int ret;
    int i;

    if (!of_machine_is_compatible("phytec,pcm030"))
        return -ENODEV;

    pdata = devm_kzalloc(&op->dev, sizeof(struct pcm030_audio_data),
                 GFP_KERNEL);
    if (!pdata)
        return -ENOMEM;

    card->dev = &op->dev;
    platform_set_drvdata(op, pdata);

    pdata->card = card;

    platform_np = of_parse_phandle(np, "asoc-platform", 0);
    if (!platform_np) {
        dev_err(&op->dev, "ac97 not registered\n");
        return -ENODEV;
    }

    for (i = 0; i < card->num_links; i++)
        card->dai_link[i].platform_of_node = platform_np;

    ret = request_module("snd-soc-wm9712");
    if (ret)
        dev_err(&op->dev, "request_module returned: %d\n", ret);

    pdata->codec_device = platform_device_alloc("wm9712-codec", -1);
    if (!pdata->codec_device)
        dev_err(&op->dev, "platform_device_alloc() failed\n");

    ret = platform_device_add(pdata->codec_device);
    if (ret)
        dev_err(&op->dev, "platform_device_add() failed: %d\n", ret);

    ret = snd_soc_register_card(card);
    if (ret)
        dev_err(&op->dev, "snd_soc_register_card() failed: %d\n", ret);

    return ret;
}

static int __devexit pcm030_fabric_remove(struct platform_device *op)
{
    struct pcm030_audio_data *pdata = platform_get_drvdata(op);
    int ret;

    ret = snd_soc_unregister_card(pdata->card);
    platform_device_unregister(pdata->codec_device);

    return ret;
}

static struct of_device_id pcm030_audio_match[] = {
    { .compatible = "phytec,pcm030-audio-fabric", },
    {}
};
MODULE_DEVICE_TABLE(of, pcm030_audio_match);

static struct platform_driver pcm030_fabric_driver = {
    .probe      = pcm030_fabric_probe,
    .remove     = __devexit_p(pcm030_fabric_remove),
    .driver     = {
        .name   = DRV_NAME,
        .owner  = THIS_MODULE,
        .of_match_table    = pcm030_audio_match,
    },
};

module_platform_driver(pcm030_fabric_driver);


MODULE_AUTHOR("Jon Smirl <[email protected]>");
MODULE_DESCRIPTION(DRV_NAME ": mpc5200 pcm030 fabric driver");
MODULE_LICENSE("GPL");