mmc_spi.h

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#ifndef __LINUX_SPI_MMC_SPI_H
#define __LINUX_SPI_MMC_SPI_H

#include <linux/spi/spi.h>
#include <linux/interrupt.h>

struct device;
struct mmc_host;

/* Put this in platform_data of a device being used to manage an MMC/SD
 * card slot.  (Modeled after PXA mmc glue; see that for usage examples.)
 *
 * REVISIT This is not a spi-specific notion.  Any card slot should be
 * able to handle it.  If the MMC core doesn't adopt this kind of notion,
 * switch the "struct device *" parameters over to "struct spi_device *".
 */
struct mmc_spi_platform_data {
    /* driver activation and (optional) card detect irq hookup */
    int (*init)(struct device *,
        irqreturn_t (*)(int, void *),
        void *);
    void (*exit)(struct device *, void *);

    /* sense switch on sd cards */
    int (*get_ro)(struct device *);

    /*
     * If board does not use CD interrupts, driver can optimize polling
     * using this function.
     */
    int (*get_cd)(struct device *);

    /* Capabilities to pass into mmc core (e.g. MMC_CAP_NEEDS_POLL). */
    unsigned long caps;

    /* how long to debounce card detect, in msecs */
    u16 detect_delay;

    /* power management */
    u16 powerup_msecs;      /* delay of up to 250 msec */
    u32 ocr_mask;           /* available voltages */
    void (*setpower)(struct device *, unsigned int maskval);
};

#ifdef CONFIG_OF
extern struct mmc_spi_platform_data *mmc_spi_get_pdata(struct spi_device *spi);
extern void mmc_spi_put_pdata(struct spi_device *spi);
#else
static inline struct mmc_spi_platform_data *
mmc_spi_get_pdata(struct spi_device *spi)
{
    return spi->dev.platform_data;
}
static inline void mmc_spi_put_pdata(struct spi_device *spi) {}
#endif /* CONFIG_OF */

#endif /* __LINUX_SPI_MMC_SPI_H */