arch/arm/mach-s3c64xx/setup-sdhci-gpio.c

   1 /* linux/arch/arm/plat-s3c64xx/setup-sdhci-gpio.c
   2  *
   3  * Copyright 2008 Simtec Electronics
   4  *      Ben Dooks <ben@simtec.co.uk>
   5  *      http://armlinux.simtec.co.uk/
   6  *
   7  * S3C64XX - Helper functions for setting up SDHCI device(s) GPIO (HSMMC)
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12 */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/types.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/io.h>
  19
  20 #include <mach/gpio.h>
  21 #include <plat/gpio-cfg.h>
  22
  23 void s3c64xx_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
  24 {
  25         unsigned int gpio;
  26         unsigned int end;
  27
  28         end = S3C64XX_GPG(2 + width);
  29
  30         /* Set all the necessary GPG pins to special-function 0 */
  31         for (gpio = S3C64XX_GPG(0); gpio < end; gpio++) {
  32                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  33                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  34         }
  35
  36         s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP);
  37         s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(2));
  38 }
  39
  40 void s3c64xx_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
  41 {
  42         unsigned int gpio;
  43         unsigned int end;
  44
  45         end = S3C64XX_GPH(2 + width);
  46
  47         /* Set all the necessary GPG pins to special-function 0 */
  48         for (gpio = S3C64XX_GPH(0); gpio < end; gpio++) {
  49                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  50                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  51         }
  52
  53         s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP);
  54         s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(3));
  55 }
  56
  57 void s3c64xx_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
  58 {
  59         unsigned int gpio;
  60         unsigned int end;
  61
  62         end = S3C64XX_GPH(6 + width);
  63
  64         /* Set all the necessary GPH pins to special-function 1 */
  65         for (gpio = S3C64XX_GPH(6); gpio < end; gpio++) {
  66                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
  67                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  68         }
  69
  70         /* Set all the necessary GPC pins to special-function 1 */
  71         for (gpio = S3C64XX_GPC(4); gpio < S3C64XX_GPC(6); gpio++) {
  72                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
  73                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  74         }
  75 }