From 86cd4f5f83acbfa481c513c74666ad360b49d73b Mon Sep 17 00:00:00 2001
From: Kyungmin Park <kyungmin.park@samsung.com>
Date: Tue, 17 Nov 2009 08:41:23 +0100
Subject: ARM: S5PC1xx: add platform helpers for SDHCI host controllers

Samsung S5PC100 has 3 SDHCI controllers compatible with the one known from
previous SoCs series. Add required platform setup and support code that
the devices can be used with sdhci-s3c driver.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
---
 arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c | 86 ++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c

(limited to 'arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c')

diff --git a/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c b/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c
new file mode 100644
index 00000000000..185c8941e64
--- /dev/null
+++ b/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c
@@ -0,0 +1,86 @@
+/* linux/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c
+ *
+ * Copyright 2009 Samsung Eletronics
+ *
+ * S5PC1XX - 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/gpio.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+
+#include <plat/gpio-cfg.h>
+#include <plat/regs-sdhci.h>
+
+void s5pc100_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
+{
+	unsigned int gpio;
+	unsigned int end;
+	unsigned int num;
+
+	num = width;
+	/* In case of 8 width, we should decrease the 2 */
+	if (width == 8)
+		num = width - 2;
+
+	end = S5PC100_GPG0(2 + num);
+
+	/* Set all the necessary GPG0/GPG1 pins to special-function 0 */
+	for (gpio = S5PC100_GPG0(0); gpio < end; gpio++) {
+		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+		s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+	}
+
+	if (width == 8) {
+		for (gpio = S5PC100_GPG1(0); gpio <= S5PC100_GPG1(1); gpio++) {
+			s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+			s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+		}
+	}
+
+	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)
+{
+	unsigned int gpio;
+	unsigned int end;
+
+	end = S5PC100_GPG2(2 + width);
+
+	/* Set all the necessary GPG2 pins to special-function 2 */
+	for (gpio = S5PC100_GPG2(0); gpio < end; gpio++) {
+		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+		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));
+}
+
+void s5pc100_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
+{
+	unsigned int gpio;
+	unsigned int end;
+
+	end = S5PC100_GPG3(2 + width);
+
+	/* Set all the necessary GPG3 pins to special-function 2 */
+	for (gpio = S5PC100_GPG3(0); gpio < end; gpio++) {
+		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+		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));
+}
-- 
cgit v1.2.3