include/linux/platform_data/mmc-esdhc-imx.h

   1 /*
   2  * Copyright 2010 Wolfram Sang <w.sang@pengutronix.de>
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; version 2
   7  * of the License.
   8  */
   9
  10 #ifndef __ASM_ARCH_IMX_ESDHC_H
  11 #define __ASM_ARCH_IMX_ESDHC_H
  12
  13 #include <linux/types.h>
  14
  15 enum wp_types {
  16         ESDHC_WP_NONE,          /* no WP, neither controller nor gpio */
  17         ESDHC_WP_CONTROLLER,    /* mmc controller internal WP */
  18         ESDHC_WP_GPIO,          /* external gpio pin for WP */
  19 };
  20
  21 enum cd_types {
  22         ESDHC_CD_NONE,          /* no CD, neither controller nor gpio */
  23         ESDHC_CD_CONTROLLER,    /* mmc controller internal CD */
  24         ESDHC_CD_GPIO,          /* external gpio pin for CD */
  25         ESDHC_CD_PERMANENT,     /* no CD, card permanently wired to host */
  26 };
  27
  28 /**
  29  * struct esdhc_platform_data - platform data for esdhc on i.MX
  30  *
  31  * ESDHC_WP(CD)_CONTROLLER type is not available on i.MX25/35.
  32  *
  33  * @wp_gpio:    gpio for write_protect
  34  * @cd_gpio:    gpio for card_detect interrupt
  35  * @wp_type:    type of write_protect method (see wp_types enum above)
  36  * @cd_type:    type of card_detect method (see cd_types enum above)
  37  * @support_vsel:  indicate it supports 1.8v switching
  38  */
  39
  40 struct esdhc_platform_data {
  41         unsigned int wp_gpio;
  42         unsigned int cd_gpio;
  43         enum wp_types wp_type;
  44         enum cd_types cd_type;
  45         int max_bus_width;
  46         bool support_vsel;
  47         unsigned int delay_line;
  48         unsigned int tuning_step;       /* The delay cell steps in tuning procedure */
  49         unsigned int tuning_start_tap;  /* The start delay cell point in tuning procedure */
  50 };
  51 #endif /* __ASM_ARCH_IMX_ESDHC_H */