ARM: S5P: Add platform helpers for camera GPIO configuration

Add functions for configuration of the parallel camera
bus pins on S5PV210 and Exynos4 SoC.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-exynos4/Kconfig

@@ -76,6 +76,11 @@ config EXYNOS4_SETUP_SDHCI_GPIO
 	help
 	  Common setup code for SDHCI gpio.
 
+config EXYNOS4_SETUP_FIMC
+	bool
+	help
+	  Common setup code for the camera interfaces.
+
 # machine support
 
 menu "EXYNOS4 Machines"

arch/arm/mach-exynos4/Makefile

@@ -41,6 +41,7 @@ obj-y					+= dev-audio.o
 obj-$(CONFIG_EXYNOS4_DEV_PD)		+= dev-pd.o
 obj-$(CONFIG_EXYNOS4_DEV_SYSMMU)	+= dev-sysmmu.o
 
+obj-$(CONFIG_EXYNOS4_SETUP_FIMC)	+= setup-fimc.o
 obj-$(CONFIG_EXYNOS4_SETUP_I2C1)	+= setup-i2c1.o
 obj-$(CONFIG_EXYNOS4_SETUP_I2C2)	+= setup-i2c2.o
 obj-$(CONFIG_EXYNOS4_SETUP_I2C3)	+= setup-i2c3.o

arch/arm/mach-exynos4/setup-fimc.c

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2011 Samsung Electronics Co., Ltd.
+ *
+ * Exynos4 camera interface GPIO configuration.
+ *
+ * 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/gpio.h>
+#include <plat/gpio-cfg.h>
+#include <plat/camport.h>
+
+int exynos4_fimc_setup_gpio(enum s5p_camport_id id)
+{
+	u32 gpio8, gpio5;
+	u32 sfn;
+	int ret;
+
+	switch (id) {
+	case S5P_CAMPORT_A:
+		gpio8 = EXYNOS4_GPJ0(0); /* PCLK, VSYNC, HREF, DATA[0:4] */
+		gpio5 = EXYNOS4_GPJ1(0); /* DATA[5:7], CLKOUT, FIELD */
+		sfn = S3C_GPIO_SFN(2);
+		break;
+
+	case S5P_CAMPORT_B:
+		gpio8 = EXYNOS4_GPE0(0); /* DATA[0:7] */
+		gpio5 = EXYNOS4_GPE1(0); /* PCLK, VSYNC, HREF, CLKOUT, FIELD */
+		sfn = S3C_GPIO_SFN(3);
+		break;
+
+	default:
+		WARN(1, "Wrong camport id: %d\n", id);
+		return -EINVAL;
+	}
+
+	ret = s3c_gpio_cfgall_range(gpio8, 8, sfn, S3C_GPIO_PULL_UP);
+	if (ret)
+		return ret;
+
+	return s3c_gpio_cfgall_range(gpio5, 5, sfn, S3C_GPIO_PULL_UP);
+}

arch/arm/mach-s5pv210/Kconfig

@@ -53,6 +53,11 @@ config S5PV210_SETUP_SDHCI_GPIO
 	help
 	  Common setup code for SDHCI gpio.
 
+config S5PV210_SETUP_FIMC
+	bool
+	help
+	  Common setup code for the camera interfaces.
+
 menu "S5PC110 Machines"
 
 config MACH_AQUILA

arch/arm/mach-s5pv210/Makefile

@@ -31,6 +31,7 @@ obj-y				+= dev-audio.o
 obj-$(CONFIG_S3C64XX_DEV_SPI)	+= dev-spi.o
 
 obj-$(CONFIG_S5PV210_SETUP_FB_24BPP)	+= setup-fb-24bpp.o
+obj-$(CONFIG_S5PV210_SETUP_FIMC)	+= setup-fimc.o
 obj-$(CONFIG_S5PV210_SETUP_I2C1) 	+= setup-i2c1.o
 obj-$(CONFIG_S5PV210_SETUP_I2C2) 	+= setup-i2c2.o
 obj-$(CONFIG_S5PV210_SETUP_IDE)		+= setup-ide.o

arch/arm/mach-s5pv210/setup-fimc.c

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2011 Samsung Electronics Co., Ltd.
+ *
+ * S5PV210 camera interface GPIO configuration.
+ *
+ * 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/gpio.h>
+#include <plat/gpio-cfg.h>
+#include <plat/camport.h>
+
+int s5pv210_fimc_setup_gpio(enum s5p_camport_id id)
+{
+	u32 gpio8, gpio5;
+	int ret;
+
+	switch (id) {
+	case S5P_CAMPORT_A:
+		gpio8 = S5PV210_GPE0(0);
+		gpio5 = S5PV210_GPE1(0);
+		break;
+
+	case S5P_CAMPORT_B:
+		gpio8 = S5PV210_GPJ0(0);
+		gpio5 = S5PV210_GPJ1(0);
+		break;
+
+	default:
+		WARN(1, "Wrong camport id: %d\n", id);
+		return -EINVAL;
+	}
+
+	ret = s3c_gpio_cfgall_range(gpio8, 8, S3C_GPIO_SFN(2),
+				    S3C_GPIO_PULL_UP);
+	if (ret)
+		return ret;
+
+	return s3c_gpio_cfgall_range(gpio5, 5, S3C_GPIO_SFN(2),
+				     S3C_GPIO_PULL_UP);
+}

arch/arm/plat-s5p/include/plat/camport.h

@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2011 Samsung Electronics Co., Ltd.
+ *
+ * S5P series camera interface helper functions
+ *
+ * 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.
+ */
+
+#ifndef PLAT_S5P_CAMPORT_H_
+#define PLAT_S5P_CAMPORT_H_ __FILE__
+
+enum s5p_camport_id {
+	S5P_CAMPORT_A,
+	S5P_CAMPORT_B,
+};
+
+/*
+ * The helper functions to configure GPIO for the camera parallel bus.
+ * The camera port can be multiplexed with any FIMC entity, even multiple
+ * FIMC entities are allowed to be attached to a single port simultaneously.
+ * These functions are to be used in the board setup code.
+ */
+int s5pv210_fimc_setup_gpio(enum s5p_camport_id id);
+int exynos4_fimc_setup_gpio(enum s5p_camport_id id);
+
+#endif