release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-s5pv210/setup-sdhci-gpio.c

   1 /* linux/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c
   2  *
   3  * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com/
   5  *
   6  * S5PV210 - Helper functions for setting up SDHCI device(s) GPIO (HSMMC)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11 */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/types.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/io.h>
  18 #include <linux/gpio.h>
  19 #include <linux/mmc/host.h>
  20 #include <linux/mmc/card.h>
  21
  22 #include <plat/gpio-cfg.h>
  23 #include <plat/regs-sdhci.h>
  24 #include <plat/sdhci.h>
  25
  26 void s5pv210_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
  27 {
  28         struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
  29         unsigned int gpio;
  30
  31         /* Set all the necessary GPG0/GPG1 pins to special-function 2 */
  32         for (gpio = S5PV210_GPG0(0); gpio < S5PV210_GPG0(2); gpio++) {
  33                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  34                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  35         }
  36         switch (width) {
  37         case 8:
  38                 /* GPG1[3:6] special-funtion 3 */
  39                 for (gpio = S5PV210_GPG1(3); gpio <= S5PV210_GPG1(6); gpio++) {
  40                         s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
  41                         s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  42                 }
  43         case 4:
  44                 /* GPG0[3:6] special-funtion 2 */
  45                 for (gpio = S5PV210_GPG0(3); gpio <= S5PV210_GPG0(6); gpio++) {
  46                         s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  47                         s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  48                 }
  49         default:
  50                 break;
  51         }
  52
  53         if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
  54                 s3c_gpio_setpull(S5PV210_GPG0(2), S3C_GPIO_PULL_UP);
  55                 s3c_gpio_cfgpin(S5PV210_GPG0(2), S3C_GPIO_SFN(2));
  56         }
  57 }
  58
  59 void s5pv210_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
  60 {
  61         struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
  62         unsigned int gpio;
  63
  64         /* Set all the necessary GPG1[0:1] pins to special-function 2 */
  65         for (gpio = S5PV210_GPG1(0); gpio < S5PV210_GPG1(2); gpio++) {
  66                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  67                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  68         }
  69
  70         /* Data pin GPG1[3:6] to special-function 2 */
  71         for (gpio = S5PV210_GPG1(3); gpio <= S5PV210_GPG1(6); gpio++) {
  72                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  73                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  74         }
  75
  76         if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
  77                 s3c_gpio_setpull(S5PV210_GPG1(2), S3C_GPIO_PULL_UP);
  78                 s3c_gpio_cfgpin(S5PV210_GPG1(2), S3C_GPIO_SFN(2));
  79         }
  80 }
  81
  82 void s5pv210_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
  83 {
  84         struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
  85         unsigned int gpio;
  86
  87         /* Set all the necessary GPG2[0:1] pins to special-function 2 */
  88         for (gpio = S5PV210_GPG2(0); gpio < S5PV210_GPG2(2); gpio++) {
  89                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  90                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  91         }
  92
  93         switch (width) {
  94         case 8:
  95                 /* Data pin GPG3[3:6] to special-function 3 */
  96                 for (gpio = S5PV210_GPG3(3); gpio <= S5PV210_GPG3(6); gpio++) {
  97                         s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
  98                         s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  99                 }
 100         case 4:
 101                 /* Data pin GPG2[3:6] to special-function 2 */
 102                 for (gpio = S5PV210_GPG2(3); gpio <= S5PV210_GPG2(6); gpio++) {
 103                         s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
 104                         s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
 105                 }
 106         default:
 107                 break;
 108         }
 109
 110         if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
 111                 s3c_gpio_setpull(S5PV210_GPG2(2), S3C_GPIO_PULL_UP);
 112                 s3c_gpio_cfgpin(S5PV210_GPG2(2), S3C_GPIO_SFN(2));
 113         }
 114 }
 115
 116 void s5pv210_setup_sdhci3_cfg_gpio(struct platform_device *dev, int width)
 117 {
 118         struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
 119         unsigned int gpio;
 120
 121         /* Set all the necessary GPG3[0:2] pins to special-function 2 */
 122         for (gpio = S5PV210_GPG3(0); gpio < S5PV210_GPG3(2); gpio++) {
 123                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
 124                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
 125         }
 126
 127         /* Data pin GPG3[3:6] to special-function 2 */
 128         for (gpio = S5PV210_GPG3(3); gpio <= S5PV210_GPG3(6); gpio++) {
 129                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
 130                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
 131         }
 132
 133         if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
 134                 s3c_gpio_setpull(S5PV210_GPG3(2), S3C_GPIO_PULL_UP);
 135                 s3c_gpio_cfgpin(S5PV210_GPG3(2), S3C_GPIO_SFN(2));
 136         }
 137 }