LXR linux/include/linux/spi/mmc

   1#ifndef __LINUX_SPI_MMC_SPI_H
   2#define __LINUX_SPI_MMC_SPI_H
   3
   4#include <linux/spi/spi.h>
   5#include <linux/interrupt.h>
   6
   7struct device;
   8struct mmc_host;
   9
  10#define MMC_SPI_USE_CD_GPIO                     (1 << 0)
  11#define MMC_SPI_USE_RO_GPIO                     (1 << 1)
  12#define MMC_SPI_CD_GPIO_ACTIVE_LOW              (1 << 2)
  13#define MMC_SPI_RO_GPIO_ACTIVE_LOW              (1 << 3)
  14
  15/* Put this in platform_data of a device being used to manage an MMC/SD
  16 * card slot.  (Modeled after PXA mmc glue; see that for usage examples.)
  17 *
  18 * REVISIT This is not a spi-specific notion.  Any card slot should be
  19 * able to handle it.  If the MMC core doesn't adopt this kind of notion,
  20 * switch the "struct device *" parameters over to "struct spi_device *".
  21 */
  22struct mmc_spi_platform_data {
  23        /* driver activation and (optional) card detect irq hookup */
  24        int (*init)(struct device *,
  25                irqreturn_t (*)(int, void *),
  26                void *);
  27        void (*exit)(struct device *, void *);
  28
  29        /*
  30         * Card Detect and Read Only GPIOs. To enable debouncing on the card
  31         * detect GPIO, set the cd_debounce to the debounce time in
  32         * microseconds.
  33         */
  34        unsigned int flags;
  35        unsigned int cd_gpio;
  36        unsigned int cd_debounce;
  37        unsigned int ro_gpio;
  38
  39        /* Capabilities to pass into mmc core (e.g. MMC_CAP_NEEDS_POLL). */
  40        unsigned long caps;
  41        unsigned long caps2;
  42
  43        /* how long to debounce card detect, in msecs */
  44        u16 detect_delay;
  45
  46        /* power management */
  47        u16 powerup_msecs;              /* delay of up to 250 msec */
  48        u32 ocr_mask;                   /* available voltages */
  49        void (*setpower)(struct device *, unsigned int maskval);
  50};
  51
  52#ifdef CONFIG_OF
  53extern struct mmc_spi_platform_data *mmc_spi_get_pdata(struct spi_device *spi);
  54extern void mmc_spi_put_pdata(struct spi_device *spi);
  55#else
  56static inline struct mmc_spi_platform_data *
  57mmc_spi_get_pdata(struct spi_device *spi)
  58{
  59        return spi->dev.platform_data;
  60}
  61static inline void mmc_spi_put_pdata(struct spi_device *spi) {}
  62#endif /* CONFIG_OF */
  63
  64#endif /* __LINUX_SPI_MMC_SPI_H */
  65