release/src-rt-6.x.4708/linux/linux-2.6.36/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 #include <linux/gpio.h>
  20
  21 #include <plat/gpio-cfg.h>
  22 #include <plat/sdhci.h>
  23
  24 void s3c64xx_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
  25 {
  26         struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
  27         unsigned int gpio;
  28         unsigned int end;
  29
  30         end = S3C64XX_GPG(2 + width);
  31
  32         /* Set all the necessary GPG pins to special-function 0 */
  33         for (gpio = S3C64XX_GPG(0); gpio < end; gpio++) {
  34                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  35                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  36         }
  37
  38         if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
  39                 s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP);
  40                 s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(2));
  41         }
  42 }
  43
  44 void s3c64xx_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
  45 {
  46         struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
  47         unsigned int gpio;
  48         unsigned int end;
  49
  50         end = S3C64XX_GPH(2 + width);
  51
  52         /* Set all the necessary GPG pins to special-function 0 */
  53         for (gpio = S3C64XX_GPH(0); gpio < end; gpio++) {
  54                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  55                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  56         }
  57
  58         if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
  59                 s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP);
  60                 s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(3));
  61         }
  62 }
  63
  64 void s3c64xx_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
  65 {
  66         unsigned int gpio;
  67         unsigned int end;
  68
  69         end = S3C64XX_GPH(6 + width);
  70
  71         /* Set all the necessary GPH pins to special-function 1 */
  72         for (gpio = S3C64XX_GPH(6); gpio < end; gpio++) {
  73                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
  74                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  75         }
  76
  77         /* Set all the necessary GPC pins to special-function 1 */
  78         for (gpio = S3C64XX_GPC(4); gpio < S3C64XX_GPC(6); gpio++) {
  79                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
  80                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  81         }
  82 }