include/linux/spi/mmc_spi.h

   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
   7 struct device;
   8 struct 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  */
  22 struct 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
  53 extern struct mmc_spi_platform_data *mmc_spi_get_pdata(struct spi_device *spi);
  54 extern void mmc_spi_put_pdata(struct spi_device *spi);
  55 #else
  56 static inline struct mmc_spi_platform_data *
  57 mmc_spi_get_pdata(struct spi_device *spi)
  58 {
  59         return spi->dev.platform_data;
  60 }
  61 static inline void mmc_spi_put_pdata(struct spi_device *spi) {}
  62 #endif /* CONFIG_OF */
  63
  64 #endif /* __LINUX_SPI_MMC_SPI_H */