sdhci-of-hlwd.c

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/*
 * drivers/mmc/host/sdhci-of-hlwd.c
 *
 * Nintendo Wii Secure Digital Host Controller Interface.
 * Copyright (C) 2009 The GameCube Linux Team
 * Copyright (C) 2009 Albert Herranz
 *
 * Based on sdhci-of-esdhc.c
 *
 * Copyright (c) 2007 Freescale Semiconductor, Inc.
 * Copyright (c) 2009 MontaVista Software, Inc.
 *
 * Authors: Xiaobo Xie <[email protected]>
 *      Anton Vorontsov <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 */

#include <linux/delay.h>
#include <linux/module.h>
#include <linux/mmc/host.h>
#include "sdhci-pltfm.h"

/*
 * Ops and quirks for the Nintendo Wii SDHCI controllers.
 */

/*
 * We need a small delay after each write, or things go horribly wrong.
 */
#define SDHCI_HLWD_WRITE_DELAY  5 /* usecs */

static void sdhci_hlwd_writel(struct sdhci_host *host, u32 val, int reg)
{
    sdhci_be32bs_writel(host, val, reg);
    udelay(SDHCI_HLWD_WRITE_DELAY);
}

static void sdhci_hlwd_writew(struct sdhci_host *host, u16 val, int reg)
{
    sdhci_be32bs_writew(host, val, reg);
    udelay(SDHCI_HLWD_WRITE_DELAY);
}

static void sdhci_hlwd_writeb(struct sdhci_host *host, u8 val, int reg)
{
    sdhci_be32bs_writeb(host, val, reg);
    udelay(SDHCI_HLWD_WRITE_DELAY);
}

static struct sdhci_ops sdhci_hlwd_ops = {
    .read_l = sdhci_be32bs_readl,
    .read_w = sdhci_be32bs_readw,
    .read_b = sdhci_be32bs_readb,
    .write_l = sdhci_hlwd_writel,
    .write_w = sdhci_hlwd_writew,
    .write_b = sdhci_hlwd_writeb,
};

static struct sdhci_pltfm_data sdhci_hlwd_pdata = {
    .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR |
          SDHCI_QUIRK_32BIT_DMA_SIZE,
    .ops = &sdhci_hlwd_ops,
};

static int __devinit sdhci_hlwd_probe(struct platform_device *pdev)
{
    return sdhci_pltfm_register(pdev, &sdhci_hlwd_pdata);
}

static int __devexit sdhci_hlwd_remove(struct platform_device *pdev)
{
    return sdhci_pltfm_unregister(pdev);
}

static const struct of_device_id sdhci_hlwd_of_match[] = {
    { .compatible = "nintendo,hollywood-sdhci" },
    { }
};
MODULE_DEVICE_TABLE(of, sdhci_hlwd_of_match);

static struct platform_driver sdhci_hlwd_driver = {
    .driver = {
        .name = "sdhci-hlwd",
        .owner = THIS_MODULE,
        .of_match_table = sdhci_hlwd_of_match,
        .pm = SDHCI_PLTFM_PMOPS,
    },
    .probe = sdhci_hlwd_probe,
    .remove = __devexit_p(sdhci_hlwd_remove),
};

module_platform_driver(sdhci_hlwd_driver);

MODULE_DESCRIPTION("Nintendo Wii SDHCI OF driver");
MODULE_AUTHOR("The GameCube Linux Team, Albert Herranz");
MODULE_LICENSE("GPL v2");