include/linux/platform_data/mmc-sdhci-s3c.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __PLATFORM_DATA_SDHCI_S3C_H
   3 #define __PLATFORM_DATA_SDHCI_S3C_H
   4
   5 struct platform_device;
   6
   7 enum cd_types {
   8         S3C_SDHCI_CD_INTERNAL,  /* use mmc internal CD line */
   9         S3C_SDHCI_CD_EXTERNAL,  /* use external callback */
  10         S3C_SDHCI_CD_GPIO,      /* use external gpio pin for CD line */
  11         S3C_SDHCI_CD_NONE,      /* no CD line, use polling to detect card */
  12         S3C_SDHCI_CD_PERMANENT, /* no CD line, card permanently wired to host */
  13 };
  14
  15 /**
  16  * struct s3c_sdhci_platdata() - Platform device data for Samsung SDHCI
  17  * @max_width: The maximum number of data bits supported.
  18  * @host_caps: Standard MMC host capabilities bit field.
  19  * @host_caps2: The second standard MMC host capabilities bit field.
  20  * @cd_type: Type of Card Detection method (see cd_types enum above)
  21  * @ext_cd_init: Initialize external card detect subsystem. Called on
  22  *               sdhci-s3c driver probe when cd_type == S3C_SDHCI_CD_EXTERNAL.
  23  *               notify_func argument is a callback to the sdhci-s3c driver
  24  *               that triggers the card detection event. Callback arguments:
  25  *               dev is pointer to platform device of the host controller,
  26  *               state is new state of the card (0 - removed, 1 - inserted).
  27  * @ext_cd_cleanup: Cleanup external card detect subsystem. Called on
  28  *               sdhci-s3c driver remove when cd_type == S3C_SDHCI_CD_EXTERNAL.
  29  *               notify_func argument is the same callback as for ext_cd_init.
  30  * @ext_cd_gpio: gpio pin used for external CD line, valid only if
  31  *               cd_type == S3C_SDHCI_CD_GPIO
  32  * @ext_cd_gpio_invert: invert values for external CD gpio line
  33  * @cfg_gpio: Configure the GPIO for a specific card bit-width
  34  *
  35  * Initialisation data specific to either the machine or the platform
  36  * for the device driver to use or call-back when configuring gpio or
  37  * card speed information.
  38 */
  39 struct s3c_sdhci_platdata {
  40         unsigned int    max_width;
  41         unsigned int    host_caps;
  42         unsigned int    host_caps2;
  43         unsigned int    pm_caps;
  44         enum cd_types   cd_type;
  45
  46         int             ext_cd_gpio;
  47         bool            ext_cd_gpio_invert;
  48         int     (*ext_cd_init)(void (*notify_func)(struct platform_device *,
  49                                                    int state));
  50         int     (*ext_cd_cleanup)(void (*notify_func)(struct platform_device *,
  51                                                       int state));
  52
  53         void    (*cfg_gpio)(struct platform_device *dev, int width);
  54 };
  55
  56
  57 #endif /* __PLATFORM_DATA_SDHCI_S3C_H */