include/linux/spi/mmc_spi.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __LINUX_SPI_MMC_SPI_H
   3 #define __LINUX_SPI_MMC_SPI_H
   4
   5 #include <linux/spi/spi.h>
   6 #include <linux/interrupt.h>
   7
   8 struct device;
   9 struct mmc_host;
  10
  11 #define MMC_SPI_USE_CD_GPIO                     (1 << 0)
  12 #define MMC_SPI_USE_RO_GPIO                     (1 << 1)
  13 #define MMC_SPI_CD_GPIO_ACTIVE_LOW              (1 << 2)
  14 #define MMC_SPI_RO_GPIO_ACTIVE_LOW              (1 << 3)
  15
  16 /* Put this in platform_data of a device being used to manage an MMC/SD
  17  * card slot.  (Modeled after PXA mmc glue; see that for usage examples.)
  18  *
  19  * REVISIT This is not a spi-specific notion.  Any card slot should be
  20  * able to handle it.  If the MMC core doesn't adopt this kind of notion,
  21  * switch the "struct device *" parameters over to "struct spi_device *".
  22  */
  23 struct mmc_spi_platform_data {
  24         /* driver activation and (optional) card detect irq hookup */
  25         int (*init)(struct device *,
  26                 irqreturn_t (*)(int, void *),
  27                 void *);
  28         void (*exit)(struct device *, void *);
  29
  30         /*
  31          * Card Detect and Read Only GPIOs. To enable debouncing on the card
  32          * detect GPIO, set the cd_debounce to the debounce time in
  33          * microseconds.
  34          */
  35         unsigned int flags;
  36         unsigned int cd_gpio;
  37         unsigned int cd_debounce;
  38         unsigned int ro_gpio;
  39
  40         /* Capabilities to pass into mmc core (e.g. MMC_CAP_NEEDS_POLL). */
  41         unsigned long caps;
  42         unsigned long caps2;
  43
  44         /* how long to debounce card detect, in msecs */
  45         u16 detect_delay;
  46
  47         /* power management */
  48         u16 powerup_msecs;              /* delay of up to 250 msec */
  49         u32 ocr_mask;                   /* available voltages */
  50         void (*setpower)(struct device *, unsigned int maskval);
  51 };
  52
  53 #ifdef CONFIG_OF
  54 extern struct mmc_spi_platform_data *mmc_spi_get_pdata(struct spi_device *spi);
  55 extern void mmc_spi_put_pdata(struct spi_device *spi);
  56 #else
  57 static inline struct mmc_spi_platform_data *
  58 mmc_spi_get_pdata(struct spi_device *spi)
  59 {
  60         return spi->dev.platform_data;
  61 }
  62 static inline void mmc_spi_put_pdata(struct spi_device *spi) {}
  63 #endif /* CONFIG_OF */
  64
  65 #endif /* __LINUX_SPI_MMC_SPI_H */