mop500.c

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/*
 * Copyright (C) ST-Ericsson SA 2012
 *
 * Author: Ola Lilja ([email protected])
 *         for ST-Ericsson.
 *
 * License terms:
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 */

#include <asm/mach-types.h>

#include <linux/module.h>
#include <linux/io.h>
#include <linux/spi/spi.h>
#include <linux/of.h>

#include <sound/soc.h>
#include <sound/initval.h>

#include "ux500_pcm.h"
#include "ux500_msp_dai.h"

#include <mop500_ab8500.h>

/* Define the whole MOP500 soundcard, linking platform to the codec-drivers  */
struct snd_soc_dai_link mop500_dai_links[] = {
    {
        .name = "ab8500_0",
        .stream_name = "ab8500_0",
        .cpu_dai_name = "ux500-msp-i2s.1",
        .codec_dai_name = "ab8500-codec-dai.0",
        .platform_name = "ux500-pcm.0",
        .codec_name = "ab8500-codec.0",
        .init = mop500_ab8500_machine_init,
        .ops = mop500_ab8500_ops,
    },
    {
        .name = "ab8500_1",
        .stream_name = "ab8500_1",
        .cpu_dai_name = "ux500-msp-i2s.3",
        .codec_dai_name = "ab8500-codec-dai.1",
        .platform_name = "ux500-pcm.0",
        .codec_name = "ab8500-codec.0",
        .init = NULL,
        .ops = mop500_ab8500_ops,
    },
};

static struct snd_soc_card mop500_card = {
    .name = "MOP500-card",
    .probe = NULL,
    .dai_link = mop500_dai_links,
    .num_links = ARRAY_SIZE(mop500_dai_links),
};

static void mop500_of_node_put(void)
{
    int i;

    for (i = 0; i < 2; i++) {
        if (mop500_dai_links[i].cpu_of_node)
            of_node_put((struct device_node *)
                mop500_dai_links[i].cpu_of_node);
        if (mop500_dai_links[i].codec_of_node)
            of_node_put((struct device_node *)
                mop500_dai_links[i].codec_of_node);
    }
}

static int __devinit mop500_of_probe(struct platform_device *pdev,
                struct device_node *np)
{
    struct device_node *codec_np, *msp_np[2];
    int i;

    msp_np[0] = of_parse_phandle(np, "stericsson,cpu-dai", 0);
    msp_np[1] = of_parse_phandle(np, "stericsson,cpu-dai", 1);
    codec_np  = of_parse_phandle(np, "stericsson,audio-codec", 0);

    if (!(msp_np[0] && msp_np[1] && codec_np)) {
        dev_err(&pdev->dev, "Phandle missing or invalid\n");
        mop500_of_node_put();
        return -EINVAL;
    }

    for (i = 0; i < 2; i++) {
        mop500_dai_links[i].cpu_of_node = msp_np[i];
        mop500_dai_links[i].cpu_dai_name = NULL;
        mop500_dai_links[i].codec_of_node = codec_np;
        mop500_dai_links[i].codec_name = NULL;
    }

    snd_soc_of_parse_card_name(&mop500_card, "stericsson,card-name");

    return 0;
}

static int __devinit mop500_probe(struct platform_device *pdev)
{
    struct device_node *np = pdev->dev.of_node;
    int ret;

    dev_dbg(&pdev->dev, "%s: Enter.\n", __func__);

    mop500_card.dev = &pdev->dev;

    if (np) {
        ret = mop500_of_probe(pdev, np);
        if (ret)
            return ret;
    }

    dev_dbg(&pdev->dev, "%s: Card %s: Set platform drvdata.\n",
        __func__, mop500_card.name);
    platform_set_drvdata(pdev, &mop500_card);

    snd_soc_card_set_drvdata(&mop500_card, NULL);

    dev_dbg(&pdev->dev, "%s: Card %s: num_links = %d\n",
        __func__, mop500_card.name, mop500_card.num_links);
    dev_dbg(&pdev->dev, "%s: Card %s: DAI-link 0: name = %s\n",
        __func__, mop500_card.name, mop500_card.dai_link[0].name);
    dev_dbg(&pdev->dev, "%s: Card %s: DAI-link 0: stream_name = %s\n",
        __func__, mop500_card.name,
        mop500_card.dai_link[0].stream_name);

    ret = snd_soc_register_card(&mop500_card);
    if (ret)
        dev_err(&pdev->dev,
            "Error: snd_soc_register_card failed (%d)!\n", ret);

    return ret;
}

static int __devexit mop500_remove(struct platform_device *pdev)
{
    struct snd_soc_card *mop500_card = platform_get_drvdata(pdev);

    pr_debug("%s: Enter.\n", __func__);

    snd_soc_unregister_card(mop500_card);
    mop500_ab8500_remove(mop500_card);
    mop500_of_node_put();

    return 0;
}

static const struct of_device_id snd_soc_mop500_match[] = {
    { .compatible = "stericsson,snd-soc-mop500", },
    {},
};

static struct platform_driver snd_soc_mop500_driver = {
    .driver = {
        .owner = THIS_MODULE,
        .name = "snd-soc-mop500",
        .of_match_table = snd_soc_mop500_match,
    },
    .probe = mop500_probe,
    .remove = __devexit_p(mop500_remove),
};

module_platform_driver(snd_soc_mop500_driver);