ARM: SAMSUNG: Add new s3c-sdhci card detection methods for Samsung SoCs

On some Samsung SoCs not all SDHCI controllers have card detect (CD)
line. For some embedded designs it is not even needed, because ususally
the device (like SDIO flash memory or wifi controller) is permanently
wired to the controller. There are also systems which have a card detect
line connected to some of the external interrupt lines or the presence
of the card depends on some other actions (like enabling a power
regulator).

This patch adds all required changes to platform support code, so
another patch, which extends the driver with support for the new card
detection methods can be applied.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
[kgene.kim@samsung.com: minor title and coding-style fixes]
[kgene.kim@samsung.com: fix build errors]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 16 insertions, 6 deletions

diff --git a/arch/arm/mach-s5pc100/setup-sdhci-gpio.c b/arch/arm/mach-s5pc100/setup-sdhci-gpio.c
index 7769c760c9ef..dc7208c639ea 100644
--- a/arch/arm/mach-s5pc100/setup-sdhci-gpio.c
+++ b/arch/arm/mach-s5pc100/setup-sdhci-gpio.c
@@ -20,9 +20,11 @@
 
 #include <plat/gpio-cfg.h>
 #include <plat/regs-sdhci.h>
+#include <plat/sdhci.h>
 
 void s5pc100_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
 {
+        struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
         unsigned int gpio;
         unsigned int end;
         unsigned int num;
@@ -47,12 +49,15 @@ void s5pc100_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
                 }
         }
 
-        s3c_gpio_setpull(S5PC100_GPG1(2), S3C_GPIO_PULL_UP);
-        s3c_gpio_cfgpin(S5PC100_GPG1(2), S3C_GPIO_SFN(2));
+        if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
+                s3c_gpio_setpull(S5PC100_GPG1(2), S3C_GPIO_PULL_UP);
+                s3c_gpio_cfgpin(S5PC100_GPG1(2), S3C_GPIO_SFN(2));
+        }
 }
 
 void s5pc100_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
 {
+        struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
         unsigned int gpio;
         unsigned int end;
 
@@ -64,12 +69,15 @@ void s5pc100_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
         }
 
-        s3c_gpio_setpull(S5PC100_GPG2(6), S3C_GPIO_PULL_UP);
-        s3c_gpio_cfgpin(S5PC100_GPG2(6), S3C_GPIO_SFN(2));
+        if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
+                s3c_gpio_setpull(S5PC100_GPG2(6), S3C_GPIO_PULL_UP);
+                s3c_gpio_cfgpin(S5PC100_GPG2(6), S3C_GPIO_SFN(2));
+        }
 }
 
 void s5pc100_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
 {
+        struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
         unsigned int gpio;
         unsigned int end;
 
@@ -81,6 +89,8 @@ void s5pc100_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
         }
 
-        s3c_gpio_setpull(S5PC100_GPG3(6), S3C_GPIO_PULL_UP);
-        s3c_gpio_cfgpin(S5PC100_GPG3(6), S3C_GPIO_SFN(2));
+        if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
+                s3c_gpio_setpull(S5PC100_GPG3(6), S3C_GPIO_PULL_UP);
+                s3c_gpio_cfgpin(S5PC100_GPG3(6), S3C_GPIO_SFN(2));
+        }
 }