arch/arm/mach-s5p64x0/setup-sdhci-gpio.c

   1 /* linux/arch/arm/mach-s5p64x0/setup-sdhci-gpio.c
   2  *
   3  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com/
   5  *
   6  * S5P64X0 - 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/platform_device.h>
  14 #include <linux/io.h>
  15 #include <linux/gpio.h>
  16
  17 #include <mach/regs-gpio.h>
  18 #include <mach/regs-clock.h>
  19
  20 #include <plat/gpio-cfg.h>
  21 #include <plat/sdhci.h>
  22 #include <plat/cpu.h>
  23
  24 void s5p64x0_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
  25 {
  26         struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
  27
  28         /* Set all the necessary GPG pins to special-function 2 */
  29         if (soc_is_s5p6450())
  30                 s3c_gpio_cfgrange_nopull(S5P6450_GPG(0), 2 + width,
  31                                          S3C_GPIO_SFN(2));
  32         else
  33                 s3c_gpio_cfgrange_nopull(S5P6440_GPG(0), 2 + width,
  34                                          S3C_GPIO_SFN(2));
  35
  36         /* Set GPG[6] pin to special-function 2 - MMC0 CDn */
  37         if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
  38                 if (soc_is_s5p6450()) {
  39                         s3c_gpio_setpull(S5P6450_GPG(6), S3C_GPIO_PULL_UP);
  40                         s3c_gpio_cfgpin(S5P6450_GPG(6), S3C_GPIO_SFN(2));
  41                 } else {
  42                         s3c_gpio_setpull(S5P6440_GPG(6), S3C_GPIO_PULL_UP);
  43                         s3c_gpio_cfgpin(S5P6440_GPG(6), S3C_GPIO_SFN(2));
  44                 }
  45         }
  46 }
  47
  48 void s5p64x0_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
  49 {
  50         struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
  51
  52         /* Set GPH[0:1] pins to special-function 2 - CLK and CMD */
  53         if (soc_is_s5p6450())
  54                 s3c_gpio_cfgrange_nopull(S5P6450_GPH(0), 2, S3C_GPIO_SFN(2));
  55         else
  56                 s3c_gpio_cfgrange_nopull(S5P6440_GPH(0), 2 , S3C_GPIO_SFN(2));
  57
  58         switch (width) {
  59         case 8:
  60                 /* Set data pins GPH[6:9] special-function 2 */
  61                 if (soc_is_s5p6450())
  62                         s3c_gpio_cfgrange_nopull(S5P6450_GPH(6), 4,
  63                                                  S3C_GPIO_SFN(2));
  64                 else
  65                         s3c_gpio_cfgrange_nopull(S5P6440_GPH(6), 4,
  66                                                  S3C_GPIO_SFN(2));
  67         case 4:
  68                 /* set data pins GPH[2:5] special-function 2 */
  69                 if (soc_is_s5p6450())
  70                         s3c_gpio_cfgrange_nopull(S5P6450_GPH(2), 4,
  71                                                  S3C_GPIO_SFN(2));
  72                 else
  73                         s3c_gpio_cfgrange_nopull(S5P6440_GPH(2), 4,
  74                                                  S3C_GPIO_SFN(2));
  75         default:
  76                 break;
  77         }
  78
  79         /* Set GPG[6] pin to special-funtion 3 : MMC1 CDn */
  80         if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
  81                 if (soc_is_s5p6450()) {
  82                         s3c_gpio_setpull(S5P6450_GPG(6), S3C_GPIO_PULL_UP);
  83                         s3c_gpio_cfgpin(S5P6450_GPG(6), S3C_GPIO_SFN(3));
  84                 } else {
  85                         s3c_gpio_setpull(S5P6440_GPG(6), S3C_GPIO_PULL_UP);
  86                         s3c_gpio_cfgpin(S5P6440_GPG(6), S3C_GPIO_SFN(3));
  87                 }
  88         }
  89 }
  90
  91 void s5p6440_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
  92 {
  93         /* Set GPC[4:5] pins to special-function 3 - CLK and CMD */
  94         s3c_gpio_cfgrange_nopull(S5P6440_GPC(4), 2, S3C_GPIO_SFN(3));
  95
  96         /* Set data pins GPH[6:9] pins to special-function 3 */
  97         s3c_gpio_cfgrange_nopull(S5P6440_GPH(6), 4, S3C_GPIO_SFN(3));
  98 }
  99
 100 void s5p6450_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
 101 {
 102         /* Set all the necessary GPG pins to special-function 3 */
 103         s3c_gpio_cfgrange_nopull(S5P6450_GPG(7), 2 + width, S3C_GPIO_SFN(3));
 104 }