ARM: S5PV210: add common HSMMC device helpers

This patch adds sdhci platform helpers required by sdhci-s3c driver.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 104 insertions, 0 deletions

diff --git a/arch/arm/mach-s5pv210/setup-sdhci-gpio.c b/arch/arm/mach-s5pv210/setup-sdhci-gpio.c
new file mode 100644
index 000000000000..fe7d86dad14c
--- /dev/null
+++ b/arch/arm/mach-s5pv210/setup-sdhci-gpio.c
@@ -0,0 +1,104 @@
+/* linux/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c
+ *
+ * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * S5PV210 - Helper functions for setting up SDHCI device(s) GPIO (HSMMC)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+
+#include <mach/gpio.h>
+#include <plat/gpio-cfg.h>
+#include <plat/regs-sdhci.h>
+
+void s5pv210_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
+{
+        unsigned int gpio;
+
+        /* Set all the necessary GPG0/GPG1 pins to special-function 2 */
+        for (gpio = S5PV210_GPG0(0); gpio < S5PV210_GPG0(2); gpio++) {
+                s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+                s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+        }
+        switch (width) {
+        case 8:
+                /* GPG1[3:6] special-funtion 3 */
+                for (gpio = S5PV210_GPG1(3); gpio <= S5PV210_GPG1(6); gpio++) {
+                        s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
+                        s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+                }
+        case 4:
+                /* GPG0[3:6] special-funtion 2 */
+                for (gpio = S5PV210_GPG0(3); gpio <= S5PV210_GPG0(6); gpio++) {
+                        s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+                        s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+                }
+        default:
+                break;
+        }
+
+        s3c_gpio_setpull(S5PV210_GPG0(2), S3C_GPIO_PULL_UP);
+        s3c_gpio_cfgpin(S5PV210_GPG0(2), S3C_GPIO_SFN(2));
+}
+
+void s5pv210_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
+{
+        unsigned int gpio;
+
+        /* Set all the necessary GPG1[0:1] pins to special-function 2 */
+        for (gpio = S5PV210_GPG1(0); gpio < S5PV210_GPG1(2); gpio++) {
+                s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+                s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+        }
+
+        /* Data pin GPG1[3:6] to special-function 2 */
+        for (gpio = S5PV210_GPG1(3); gpio <= S5PV210_GPG1(6); gpio++) {
+                s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+                s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+        }
+
+        s3c_gpio_setpull(S5PV210_GPG1(2), S3C_GPIO_PULL_UP);
+        s3c_gpio_cfgpin(S5PV210_GPG1(2), S3C_GPIO_SFN(2));
+}
+
+void s5pv210_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
+{
+        unsigned int gpio;
+
+        /* Set all the necessary GPG2[0:1] pins to special-function 2 */
+        for (gpio = S5PV210_GPG2(0); gpio < S5PV210_GPG2(2); gpio++) {
+                s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+                s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+        }
+
+        switch (width) {
+        case 8:
+                /* Data pin GPG3[3:6] to special-function 3 */
+                for (gpio = S5PV210_GPG3(3); gpio <= S5PV210_GPG3(6); gpio++) {
+                        s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
+                        s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+                }
+        case 4:
+                /* Data pin GPG2[3:6] to special-function 2 */
+                for (gpio = S5PV210_GPG2(3); gpio <= S5PV210_GPG2(6); gpio++) {
+                        s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+                        s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+                }
+        default:
+                break;
+        }
+
+        s3c_gpio_setpull(S5PV210_GPG2(2), S3C_GPIO_PULL_UP);
+        s3c_gpio_cfgpin(S5PV210_GPG2(2), S3C_GPIO_SFN(2));
+}