ARM: S5PC1xx: add platform helpers for s3c-fb device

Samsung S5PC100 has LCD-controller compatible with the one known from
previous SoCs series. Add required platform setup and support code that
it can be used with s3c-fb driver.

Signed-off-by: Pawel Osciak <p.osciak@samsung.com>
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>

6 files changed, 206 insertions, 0 deletions

diff --git a/arch/arm/mach-s5pc100/include/mach/irqs.h b/arch/arm/mach-s5pc100/include/mach/irqs.h
index 622720dba28..b53fa48a52c 100644
--- a/arch/arm/mach-s5pc100/include/mach/irqs.h
+++ b/arch/arm/mach-s5pc100/include/mach/irqs.h
@@ -11,4 +11,9 @@
 
 #include <plat/irqs.h>
 
+/* LCD */
+#define IRQ_LCD_FIFO		IRQ_LCD0
+#define IRQ_LCD_VSYNC		IRQ_LCD1
+#define IRQ_LCD_SYSTEM		IRQ_LCD2
+
 #endif /* __ASM_ARCH_IRQ_H */
diff --git a/arch/arm/mach-s5pc100/include/mach/regs-fb.h b/arch/arm/mach-s5pc100/include/mach/regs-fb.h
new file mode 100644
index 00000000000..1732cd28c76
--- /dev/null
+++ b/arch/arm/mach-s5pc100/include/mach/regs-fb.h
@@ -0,0 +1,139 @@
+/* arch/arm/mach-s5pc100/include/mach/regs-fb.h
+ *
+ * Copyright 2009 Samsung Electronics Co.
+ *   Pawel Osciak <p.osciak@samsung.com>
+ *
+ * Framebuffer register definitions for Samsung S5PC100.
+ *
+ * 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 __ASM_ARCH_REGS_FB_H
+#define __ASM_ARCH_REGS_FB_H __FILE__
+
+#include <plat/regs-fb-v4.h>
+
+/* VP1 interface timing control */
+#define VP1CON0						(0x118)
+#define VP1_RATECON_EN					(1 << 31)
+#define VP1_CLKRATE_MASK				(0xff)
+
+#define VP1CON1						(0x11c)
+#define VP1_VTREGCON_EN					(1 << 31)
+#define VP1_VBPD_MASK					(0xfff)
+#define VP1_VBPD_SHIFT					(16)
+
+
+#define WPALCON_H					(0x19c)
+#define WPALCON_L					(0x1a0)
+
+/* Pallete contro for WPAL0 and WPAL1 is the same as in S3C64xx, but
+ * different for WPAL2-4
+ */
+/* In WPALCON_L (aka WPALCON) */
+#define WPALCON_W1PAL_32BPP_A888			(0x7 << 3)
+#define WPALCON_W0PAL_32BPP_A888			(0x7 << 0)
+
+/* To set W2PAL-W4PAL consist of one bit from WPALCON_L and two from WPALCON_H,
+ * e.g. W2PAL[2..0] is made of (WPALCON_H[10..9], WPALCON_L[6]).
+ */
+#define WPALCON_L_WxPAL_L_MASK				(0x1)
+#define WPALCON_L_W2PAL_L_SHIFT				(6)
+#define WPALCON_L_W3PAL_L_SHIFT				(7)
+#define WPALCON_L_W4PAL_L_SHIFT				(8)
+
+#define WPALCON_L_WxPAL_H_MASK				(0x3)
+#define WPALCON_H_W2PAL_H_SHIFT				(9)
+#define WPALCON_H_W3PAL_H_SHIFT				(13)
+#define WPALCON_H_W4PAL_H_SHIFT				(17)
+
+/* Per-window alpha value registers */
+/* For window 0 8-bit alpha values are in VIDW0ALPHAx,
+ * for windows 1-4 alpha values consist of two parts, the 4 low bits are
+ * taken from VIDWxALPHAx and 4 high bits are from VIDOSDxC,
+ * e.g. WIN1_ALPHA0_B[7..0] = (VIDOSD1C[3..0], VIDW1ALPHA0[3..0])
+ */
+#define VIDWxALPHA0(_win)				(0x200 + (_win * 8))
+#define VIDWxALPHA1(_win)				(0x204 + (_win * 8))
+
+/* Only for window 0 in VIDW0ALPHAx. */
+#define VIDW0ALPHAx_R(_x)				((_x) << 16)
+#define VIDW0ALPHAx_R_MASK				(0xff << 16)
+#define VIDW0ALPHAx_R_SHIFT				(16)
+#define VIDW0ALPHAx_G(_x)				((_x) << 8)
+#define VIDW0ALPHAx_G_MASK				(0xff << 8)
+#define VIDW0ALPHAx_G_SHIFT				(8)
+#define VIDW0ALPHAx_B(_x)				((_x) << 0)
+#define VIDW0ALPHAx_B_MASK				(0xff << 0)
+#define VIDW0ALPHAx_B_SHIFT				(0)
+
+/* Low 4 bits of alpha0-1 for windows 1-4 */
+#define VIDW14ALPHAx_R_L(_x)				((_x) << 16)
+#define VIDW14ALPHAx_R_L_MASK				(0xf << 16)
+#define VIDW14ALPHAx_R_L_SHIFT				(16)
+#define VIDW14ALPHAx_G_L(_x)				((_x) << 8)
+#define VIDW14ALPHAx_G_L_MASK				(0xf << 8)
+#define VIDW14ALPHAx_G_L_SHIFT				(8)
+#define VIDW14ALPHAx_B_L(_x)				((_x) << 0)
+#define VIDW14ALPHAx_B_L_MASK				(0xf << 0)
+#define VIDW14ALPHAx_B_L_SHIFT				(0)
+
+
+/* Per-window blending equation control registers */
+#define BLENDEQx(_win)					(0x244 + ((_win) * 4))
+#define BLENDEQ1					(0x244)
+#define BLENDEQ2					(0x248)
+#define BLENDEQ3					(0x24c)
+#define BLENDEQ4					(0x250)
+
+#define BLENDEQx_Q_FUNC(_x)				((_x) << 18)
+#define BLENDEQx_Q_FUNC_MASK				(0xf << 18)
+#define BLENDEQx_P_FUNC(_x)				((_x) << 12)
+#define BLENDEQx_P_FUNC_MASK				(0xf << 12)
+#define BLENDEQx_B_FUNC(_x)				((_x) << 6)
+#define BLENDEQx_B_FUNC_MASK				(0xf << 6)
+#define BLENDEQx_A_FUNC(_x)				((_x) << 0)
+#define BLENDEQx_A_FUNC_MASK				(0xf << 0)
+
+#define BLENDCON					(0x260)
+#define BLENDCON_8BIT_ALPHA				(1 << 0)
+
+/* Per-window palette base addresses (start of palette memory).
+ * Each window palette area consists of 256 32-bit entries.
+ * START is the first address (entry 0th), END is the address of 255th entry.
+ */
+#define WIN0_PAL_BASE					(0x2400)
+#define WIN0_PAL_END					(0x27fc)
+#define WIN1_PAL_BASE					(0x2800)
+#define WIN1_PAL_END					(0x2bfc)
+#define WIN2_PAL_BASE					(0x2c00)
+#define WIN2_PAL_END					(0x2ffc)
+#define WIN3_PAL_BASE					(0x3000)
+#define WIN3_PAL_END					(0x33fc)
+#define WIN4_PAL_BASE					(0x3400)
+#define WIN4_PAL_END					(0x37fc)
+
+#define WIN0_PAL(_entry)			(WIN0_PAL_BASE + ((_entry) * 4))
+#define WIN1_PAL(_entry)			(WIN1_PAL_BASE + ((_entry) * 4))
+#define WIN2_PAL(_entry)			(WIN2_PAL_BASE + ((_entry) * 4))
+#define WIN3_PAL(_entry)			(WIN3_PAL_BASE + ((_entry) * 4))
+#define WIN4_PAL(_entry)			(WIN4_PAL_BASE + ((_entry) * 4))
+
+static inline unsigned int s3c_fb_pal_reg(unsigned int window, int reg)
+{
+	switch (window) {
+	case 0: return WIN0_PAL(reg);
+	case 1: return WIN1_PAL(reg);
+	case 2: return WIN2_PAL(reg);
+	case 3: return WIN3_PAL(reg);
+	case 4: return WIN4_PAL(reg);
+	}
+
+	BUG();
+}
+
+
+#endif /* __ASM_ARCH_REGS_FB_H */
+
diff --git a/arch/arm/plat-s3c/include/plat/fb.h b/arch/arm/plat-s3c/include/plat/fb.h
index 214ff561b0d..f8db87930f8 100644
--- a/arch/arm/plat-s3c/include/plat/fb.h
+++ b/arch/arm/plat-s3c/include/plat/fb.h
@@ -70,4 +70,11 @@ extern void s3c_fb_set_platdata(struct s3c_fb_platdata *pd);
  */
 extern void s3c64xx_fb_gpio_setup_24bpp(void);
 
+/**
+ * s5pc100_fb_gpio_setup_24bpp() - S5PC100 setup function for 24bpp LCD
+ *
+ * Initialise the GPIO for an 24bpp LCD display on the RGB interface.
+ */
+extern void s5pc100_fb_gpio_setup_24bpp(void);
+
 #endif /* __PLAT_S3C_FB_H */
diff --git a/arch/arm/plat-s5pc1xx/Kconfig b/arch/arm/plat-s5pc1xx/Kconfig
index 86edd27c7f2..6ac48a6fba7 100644
--- a/arch/arm/plat-s5pc1xx/Kconfig
+++ b/arch/arm/plat-s5pc1xx/Kconfig
@@ -37,6 +37,11 @@ config CPU_S5PC100_CLOCK
 
 # platform specific device setup
 
+config S5PC1XX_SETUP_FB_24BPP
+	bool
+	help
+          Common setup code for S5PC1XX with an 24bpp RGB display helper.
+
 config S5PC100_SETUP_I2C0
 	bool
 	default y
diff --git a/arch/arm/plat-s5pc1xx/Makefile b/arch/arm/plat-s5pc1xx/Makefile
index e860813cb8d..3d2ac7150b1 100644
--- a/arch/arm/plat-s5pc1xx/Makefile
+++ b/arch/arm/plat-s5pc1xx/Makefile
@@ -25,5 +25,6 @@ obj-$(CONFIG_CPU_S5PC100_CLOCK)	+= s5pc100-clock.o
 # Device setup
 
 obj-$(CONFIG_S5P_GPIO_CFG_S5PC1XX) += gpio-config.o
+obj-$(CONFIG_S5PC1XX_SETUP_FB_24BPP) += setup-fb-24bpp.o
 obj-$(CONFIG_S5PC100_SETUP_I2C0) += setup-i2c0.o
 obj-$(CONFIG_S5PC100_SETUP_I2C1) += setup-i2c1.o
diff --git a/arch/arm/plat-s5pc1xx/setup-fb-24bpp.c b/arch/arm/plat-s5pc1xx/setup-fb-24bpp.c
new file mode 100644
index 00000000000..1a63768a9a2
--- /dev/null
+++ b/arch/arm/plat-s5pc1xx/setup-fb-24bpp.c
@@ -0,0 +1,49 @@
+/*
+ * linux/arch/arm/plat-s5pc100/setup-fb-24bpp.c
+ *
+ * Copyright 2009 Samsung Electronics
+ *
+ * Base S5PC1XX setup information for 24bpp LCD framebuffer
+ *
+ * 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/fb.h>
+#include <linux/gpio.h>
+
+#include <mach/regs-fb.h>
+#include <mach/map.h>
+#include <plat/fb.h>
+#include <plat/gpio-cfg.h>
+#include <plat/gpio-cfg-s5pc1xx.h>
+
+#define DISR_OFFSET	0x7008
+
+void s5pc100_fb_gpio_setup_24bpp(void)
+{
+	unsigned int gpio = 0;
+
+	for (gpio = S5PC100_GPF0(0); gpio <= S5PC100_GPF0(7); gpio++) {
+		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+		s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+	}
+
+	for (gpio = S5PC100_GPF1(0); gpio <= S5PC100_GPF1(7); gpio++) {
+		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+		s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+	}
+
+	for (gpio = S5PC100_GPF2(0); gpio <= S5PC100_GPF2(7); gpio++) {
+		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+		s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+	}
+
+	for (gpio = S5PC100_GPF3(0); gpio <= S5PC100_GPF3(3); gpio++) {
+		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+		s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+	}
+}