sdhci-pltfm.h

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/*
 * Copyright 2010 MontaVista Software, LLC.
 *
 * Author: 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 version 2 as
 * published by the Free Software Foundation.
 */

#ifndef _DRIVERS_MMC_SDHCI_PLTFM_H
#define _DRIVERS_MMC_SDHCI_PLTFM_H

#include <linux/clk.h>
#include <linux/platform_device.h>
#include "sdhci.h"

struct sdhci_pltfm_data {
    struct sdhci_ops *ops;
    unsigned int quirks;
};

struct sdhci_pltfm_host {
    struct clk *clk;
    void *priv; /* to handle quirks across io-accessor calls */

    /* migrate from sdhci_of_host */
    unsigned int clock;
    u16 xfer_mode_shadow;
};

#ifdef CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER
/*
 * These accessors are designed for big endian hosts doing I/O to
 * little endian controllers incorporating a 32-bit hardware byte swapper.
 */
static inline u32 sdhci_be32bs_readl(struct sdhci_host *host, int reg)
{
    return in_be32(host->ioaddr + reg);
}

static inline u16 sdhci_be32bs_readw(struct sdhci_host *host, int reg)
{
    return in_be16(host->ioaddr + (reg ^ 0x2));
}

static inline u8 sdhci_be32bs_readb(struct sdhci_host *host, int reg)
{
    return in_8(host->ioaddr + (reg ^ 0x3));
}

static inline void sdhci_be32bs_writel(struct sdhci_host *host,
                       u32 val, int reg)
{
    out_be32(host->ioaddr + reg, val);
}

static inline void sdhci_be32bs_writew(struct sdhci_host *host,
                       u16 val, int reg)
{
    struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
    int base = reg & ~0x3;
    int shift = (reg & 0x2) * 8;

    switch (reg) {
    case SDHCI_TRANSFER_MODE:
        /*
         * Postpone this write, we must do it together with a
         * command write that is down below.
         */
        pltfm_host->xfer_mode_shadow = val;
        return;
    case SDHCI_COMMAND:
        sdhci_be32bs_writel(host,
                    val << 16 | pltfm_host->xfer_mode_shadow,
                    SDHCI_TRANSFER_MODE);
        return;
    }
    clrsetbits_be32(host->ioaddr + base, 0xffff << shift, val << shift);
}

static inline void sdhci_be32bs_writeb(struct sdhci_host *host, u8 val, int reg)
{
    int base = reg & ~0x3;
    int shift = (reg & 0x3) * 8;

    clrsetbits_be32(host->ioaddr + base , 0xff << shift, val << shift);
}
#endif /* CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER */

extern void sdhci_get_of_property(struct platform_device *pdev);

extern struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
                       struct sdhci_pltfm_data *pdata);
extern void sdhci_pltfm_free(struct platform_device *pdev);

extern int sdhci_pltfm_register(struct platform_device *pdev,
                struct sdhci_pltfm_data *pdata);
extern int sdhci_pltfm_unregister(struct platform_device *pdev);

#ifdef CONFIG_PM
extern const struct dev_pm_ops sdhci_pltfm_pmops;
#define SDHCI_PLTFM_PMOPS (&sdhci_pltfm_pmops)
#else
#define SDHCI_PLTFM_PMOPS NULL
#endif

#endif /* _DRIVERS_MMC_SDHCI_PLTFM_H */