[PATCH] s3c2410fb: ARM S3C2410 framebuffer driver

This set of two patches add support for the framebuffer of the Samsung S3C2410
ARM SoC.  This driver was started about one year ago and is now used on iPAQ
h1930/h1940, Acer n30 and probably other s3c2410-based machines I'm not aware
of.  I've also heard yesterday that it's working also on iPAQ rx3715/rx3115
(s3c2440-based machines).
Signed-Off-By: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Ben Dooks <ben@trinity.fluff.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/video/Kconfig

@@ -1516,6 +1516,30 @@ config FB_S1D13XXX
 	  working with S1D13806). Product specs at
 	  <http://www.erd.epson.com/vdc/html/legacy_13xxx.htm>
 
+config FB_S3C2410
+	tristate "S3C2410 LCD framebuffer support"
+	depends on FB && ARCH_S3C2410
+	select FB_CFB_FILLRECT
+	select FB_CFB_COPYAREA
+	select FB_CFB_IMAGEBLIT
+	select FB_SOFT_CURSOR
+	---help---
+	  Frame buffer driver for the built-in LCD controller in the Samsung
+	  S3C2410 processor.
+
+	  This driver is also available as a module ( = code which can be
+	  inserted and removed from the running kernel whenever you want). The
+	  module will be called s3c2410fb. If you want to compile it as a module,
+	  say M here and read <file:Documentation/modules.txt>.
+
+	  If unsure, say N.
+config FB_S3C2410_DEBUG
+	bool "S3C2410 lcd debug messages"
+	depends on FB_S3C2410
+	help
+	  Turn on debugging messages. Note that you can set/unset at run time
+	  through sysfs
+
 config FB_VIRTUAL
 	tristate "Virtual Frame Buffer support (ONLY FOR TESTING!)"
 	depends on FB

drivers/video/Makefile

@@ -94,6 +94,7 @@ obj-$(CONFIG_FB_MAXINE)		  += maxinefb.o
 obj-$(CONFIG_FB_TX3912)		  += tx3912fb.o
 obj-$(CONFIG_FB_S1D13XXX)	  += s1d13xxxfb.o
 obj-$(CONFIG_FB_IMX)              += imxfb.o
+obj-$(CONFIG_FB_S3C2410)	  += s3c2410fb.o
 
 # Platform or fallback drivers go here
 obj-$(CONFIG_FB_VESA)             += vesafb.o

drivers/video/s3c2410fb.h

+/*
+ * linux/drivers/s3c2410fb.h
+ * Copyright (c) Arnaud Patard
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive for
+ * more details.
+ *
+ *	    S3C2410 LCD Controller Frame Buffer Driver
+ *	    based on skeletonfb.c, sa1100fb.h
+ *
+ * ChangeLog
+ *
+ * 2004-12-04: Arnaud Patard <arnaud.patard@rtp-net.org>
+ *      - Moved dprintk to s3c2410fb.c
+ *
+ * 2004-09-07: Arnaud Patard <arnaud.patard@rtp-net.org>
+ * 	- Renamed from h1940fb.h to s3c2410fb.h
+ * 	- Chenged h1940 to s3c2410
+ *
+ * 2004-07-15: Arnaud Patard <arnaud.patard@rtp-net.org>
+ *	- First version
+ */
+
+#ifndef __S3C2410FB_H
+#define __S3C2410FB_H
+
+struct s3c2410fb_info {
+	struct fb_info		*fb;
+	struct device		*dev;
+	struct clk		*clk;
+
+	struct s3c2410fb_mach_info *mach_info;
+
+	/* raw memory addresses */
+	dma_addr_t		map_dma;	/* physical */
+	u_char *		map_cpu;	/* virtual */
+	u_int			map_size;
+
+	struct s3c2410fb_hw	regs;
+
+	/* addresses of pieces placed in raw buffer */
+	u_char *		screen_cpu;	/* virtual address of buffer */
+	dma_addr_t		screen_dma;	/* physical address of buffer */
+	unsigned int		palette_ready;
+
+	/* keep these registers in case we need to re-write palette */
+	u32			palette_buffer[256];
+	u32			pseudo_pal[16];
+};
+
+#define PALETTE_BUFF_CLEAR (0x80000000)	/* entry is clear/invalid */
+
+int s3c2410fb_init(void);
+
+#endif

include/asm-arm/arch-s3c2410/fb.h

+/* linux/include/asm/arch-s3c2410/fb.h
+ *
+ * Copyright (c) 2004 Arnaud Patard <arnaud.patard@rtp-net.org>
+ *
+ * Inspired by pxafb.h
+ *
+ * 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.
+ *
+ *
+ *  Changelog:
+ *	07-Sep-2004	RTP	Created file
+ *	03-Nov-2004	BJD	Updated and minor cleanups
+ *	03-Aug-2005     RTP     Renamed to fb.h
+*/
+
+#ifndef __ASM_ARM_FB_H
+#define __ASM_ARM_FB_H
+
+#include <asm/arch/regs-lcd.h>
+
+struct s3c2410fb_val {
+	unsigned int	defval;
+	unsigned int	min;
+	unsigned int	max;
+};
+
+struct s3c2410fb_hw {
+	unsigned long	lcdcon1;
+	unsigned long	lcdcon2;
+	unsigned long	lcdcon3;
+	unsigned long	lcdcon4;
+	unsigned long	lcdcon5;
+};
+
+struct s3c2410fb_mach_info {
+	unsigned char	fixed_syncs;	/* do not update sync/border */
+
+	/* Screen size */
+	int		width;
+	int		height;
+
+	/* Screen info */
+	struct s3c2410fb_val xres;
+	struct s3c2410fb_val yres;
+	struct s3c2410fb_val bpp;
+
+	/* lcd configuration registers */
+	struct s3c2410fb_hw  regs;
+
+	/* GPIOs */
+
+	unsigned long	gpcup;
+	unsigned long	gpcup_mask;
+	unsigned long	gpccon;
+	unsigned long	gpccon_mask;
+	unsigned long	gpdup;
+	unsigned long	gpdup_mask;
+	unsigned long	gpdcon;
+	unsigned long	gpdcon_mask;
+
+	/* lpc3600 control register */
+	unsigned long	lpcsel;
+};
+
+void __init set_s3c2410fb_info(struct s3c2410fb_mach_info *hard_s3c2410fb_info);
+
+#endif /* __ASM_ARM_FB_H */

include/asm-arm/arch-s3c2410/regs-lcd.h

@@ -51,21 +51,32 @@
 
 #define S3C2410_LCDCON1_ENVID	   (1)
 
+#define S3C2410_LCDCON1_MODEMASK    0x1E
+
 #define S3C2410_LCDCON2_VBPD(x)	    ((x) << 24)
 #define S3C2410_LCDCON2_LINEVAL(x)  ((x) << 14)
 #define S3C2410_LCDCON2_VFPD(x)	    ((x) << 6)
 #define S3C2410_LCDCON2_VSPW(x)	    ((x) << 0)
 
+#define S3C2410_LCDCON2_GET_VBPD(x) ( ((x) >> 24) & 0xFF)
+#define S3C2410_LCDCON2_GET_VFPD(x) ( ((x) >>  6) & 0xFF)
+#define S3C2410_LCDCON2_GET_VSPW(x) ( ((x) >>  0) & 0x3F)
+
 #define S3C2410_LCDCON3_HBPD(x)	    ((x) << 19)
 #define S3C2410_LCDCON3_WDLY(x)	    ((x) << 19)
 #define S3C2410_LCDCON3_HOZVAL(x)   ((x) << 8)
 #define S3C2410_LCDCON3_HFPD(x)	    ((x) << 0)
 #define S3C2410_LCDCON3_LINEBLANK(x)((x) << 0)
 
+#define S3C2410_LCDCON3_GET_HBPD(x) ( ((x) >> 19) & 0x7F)
+#define S3C2410_LCDCON3_GET_HFPD(x) ( ((x) >>  0) & 0xFF)
+
 #define S3C2410_LCDCON4_MVAL(x)	    ((x) << 8)
 #define S3C2410_LCDCON4_HSPW(x)	    ((x) << 0)
 #define S3C2410_LCDCON4_WLH(x)	    ((x) << 0)
 
+#define S3C2410_LCDCON4_GET_HSPW(x) ( ((x) >>  0) & 0xFF)
+
 #define S3C2410_LCDCON5_BPP24BL	    (1<<12)
 #define S3C2410_LCDCON5_FRM565	    (1<<11)
 #define S3C2410_LCDCON5_INVVCLK	    (1<<10)
@@ -100,10 +111,16 @@
 #define S3C2410_DITHMODE   S3C2410_LCDREG(0x4C)
 #define S3C2410_TPAL	   S3C2410_LCDREG(0x50)
 
+#define S3C2410_TPAL_EN		(1<<24)
+
 /* interrupt info */
 #define S3C2410_LCDINTPND  S3C2410_LCDREG(0x54)
 #define S3C2410_LCDSRCPND  S3C2410_LCDREG(0x58)
 #define S3C2410_LCDINTMSK  S3C2410_LCDREG(0x5C)
+#define S3C2410_LCDINT_FIWSEL	(1<<2)
+#define	S3C2410_LCDINT_FRSYNC	(1<<1)
+#define S3C2410_LCDINT_FICNT	(1<<0)
+
 #define S3C2410_LPCSEL	   S3C2410_LCDREG(0x60)
 
 #define S3C2410_TFTPAL(x)  S3C2410_LCDREG((0x400 + (x)*4))