release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-s5pc100/setup-sdhci-gpio.c

   1 /* linux/arch/arm/plat-s5pc100/setup-sdhci-gpio.c
   2  *
   3  * Copyright 2009 Samsung Eletronics
   4  *
   5  * S5PC100 - Helper functions for setting up SDHCI device(s) GPIO (HSMMC)
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10 */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/types.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/io.h>
  17 #include <linux/gpio.h>
  18 #include <linux/mmc/host.h>
  19 #include <linux/mmc/card.h>
  20
  21 #include <plat/gpio-cfg.h>
  22 #include <plat/regs-sdhci.h>
  23 #include <plat/sdhci.h>
  24
  25 void s5pc100_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
  26 {
  27         struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
  28         unsigned int gpio;
  29         unsigned int end;
  30         unsigned int num;
  31
  32         num = width;
  33         /* In case of 8 width, we should decrease the 2 */
  34         if (width == 8)
  35                 num = width - 2;
  36
  37         end = S5PC100_GPG0(2 + num);
  38
  39         /* Set all the necessary GPG0/GPG1 pins to special-function 0 */
  40         for (gpio = S5PC100_GPG0(0); gpio < end; gpio++) {
  41                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  42                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  43         }
  44
  45         if (width == 8) {
  46                 for (gpio = S5PC100_GPG1(0); gpio <= S5PC100_GPG1(1); gpio++) {
  47                         s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  48                         s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  49                 }
  50         }
  51
  52         if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
  53                 s3c_gpio_setpull(S5PC100_GPG1(2), S3C_GPIO_PULL_UP);
  54                 s3c_gpio_cfgpin(S5PC100_GPG1(2), S3C_GPIO_SFN(2));
  55         }
  56 }
  57
  58 void s5pc100_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
  59 {
  60         struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
  61         unsigned int gpio;
  62         unsigned int end;
  63
  64         end = S5PC100_GPG2(2 + width);
  65
  66         /* Set all the necessary GPG2 pins to special-function 2 */
  67         for (gpio = S5PC100_GPG2(0); gpio < end; gpio++) {
  68                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  69                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  70         }
  71
  72         if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
  73                 s3c_gpio_setpull(S5PC100_GPG2(6), S3C_GPIO_PULL_UP);
  74                 s3c_gpio_cfgpin(S5PC100_GPG2(6), S3C_GPIO_SFN(2));
  75         }
  76 }
  77
  78 void s5pc100_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
  79 {
  80         struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
  81         unsigned int gpio;
  82         unsigned int end;
  83
  84         end = S5PC100_GPG3(2 + width);
  85
  86         /* Set all the necessary GPG3 pins to special-function 2 */
  87         for (gpio = S5PC100_GPG3(0); gpio < end; gpio++) {
  88                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  89                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  90         }
  91
  92         if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
  93                 s3c_gpio_setpull(S5PC100_GPG3(6), S3C_GPIO_PULL_UP);
  94                 s3c_gpio_cfgpin(S5PC100_GPG3(6), S3C_GPIO_SFN(2));
  95         }
  96 }