Merge with Linux 2.3.99-pre4.

1 files changed, 1147 insertions, 0 deletions

diff --git a/drivers/video/sa1100fb.c b/drivers/video/sa1100fb.c
new file mode 100644
index 000000000..39e518fa5
--- /dev/null
+++ b/drivers/video/sa1100fb.c
@@ -0,0 +1,1147 @@
+/*
+ * linux/drivers/video/sa1100fb.c -- StrongARM 1100 LCD Controller Frame Buffer Device
+ *
+ *  Copyright (C) 1999 Eric A. Thomas
+ *  
+ * 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.
+ *
+ */
+
+
+/*
+ *   Code Status:
+ *	4/1/99 - Driver appears to be working for Brutus 320x200x8bpp mode.  Other
+ *               resolutions are working, but only the 8bpp mode is supported.
+ *               Changes need to be made to the palette encode and decode routines
+ *               to support 4 and 16 bpp modes.  
+ *               Driver is not designed to be a module.  The FrameBuffer is statically
+ *               allocated since dynamic allocation of a 300k buffer cannot be guaranteed. 
+ *
+ *     6/17/99 - FrameBuffer memory is now allocated at run-time when the
+ *               driver is initialized.    
+ *
+ */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/malloc.h>
+#include <linux/init.h>
+#include <linux/fb.h>
+#include <linux/delay.h>
+
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/proc/pgtable.h>
+
+#include <video/fbcon.h>
+#include <video/fbcon-mfb.h>
+#include <video/fbcon-cfb4.h>
+#include <video/fbcon-cfb8.h>
+#include <video/fbcon-cfb16.h>
+
+
+/*
+ *  Debug macros 
+ */
+// #define DEBUG 
+#ifdef DEBUG
+#  define DPRINTK(fmt, args...)	printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
+#else
+#  define DPRINTK(fmt, args...)
+#endif
+
+
+/* 
+ *  The MAX_x defines are used to specify the maximum ranges for 
+ *  parameters that affect the size of the frame buffer memory
+ *  region.  Since the frame buffer memory is not dynamically 
+ *  alocated, the maximum size that will be used is allocated.
+ */
+#if defined (CONFIG_SA1100_PENNY)
+
+#define MAX_BITS_PER_PIXEL   		8
+#define MAX_SCREEN_SIZE_H   		640
+#define MAX_SCREEN_SIZE_V    		480
+
+#elif defined(CONFIG_SA1100_BRUTUS)
+
+#define MAX_BITS_PER_PIXEL   		8
+#define MAX_SCREEN_SIZE_H   		320
+#define MAX_SCREEN_SIZE_V    		240
+
+#elif defined (CONFIG_SA1100_THINCLIENT)
+
+#define MAX_BITS_PER_PIXEL   		8 
+/*#define MAX_BITS_PER_PIXEL   		16*/
+
+#define MAX_SCREEN_SIZE_H   		640
+#define MAX_SCREEN_SIZE_V    		480
+
+#elif defined(CONFIG_SA1100_TIFON)
+
+#define MAX_BITS_PER_PIXEL   		4
+#define MAX_SCREEN_SIZE_H   		640
+#define MAX_SCREEN_SIZE_V    		200
+
+#define REVERSE_VIDEO_4BIT
+
+#elif defined(CONFIG_SA1100_LART)
+
+#define MAX_BITS_PER_PIXEL     		4
+#define MAX_SCREEN_SIZE_H      		320
+#define MAX_SCREEN_SIZE_V      		240
+
+#endif
+
+/* Default resolutions */
+#if defined(CONFIG_SA1100_PENNY) 
+#define DEFAULT_XRES	640
+#define DEFAULT_YRES	480
+#define DEFAULT_BPP	8
+#else
+#define DEFAULT_XRES	MAX_SCREEN_SIZE_H
+#define DEFAULT_YRES	MAX_SCREEN_SIZE_V
+#define DEFAULT_BPP	MAX_BITS_PER_PIXEL
+#endif
+
+/* Memory size macros for determining required FrameBuffer size */
+#define MAX_PALETTE_NUM_ENTRIES         256
+#define ADJUSTED_MAX_BITS_PER_PIXEL     (MAX_BITS_PER_PIXEL > 8 ? 16 : MAX_BITS_PER_PIXEL)
+#define MAX_PALETTE_MEM_SIZE            (MAX_PALETTE_NUM_ENTRIES * 2)
+#define MAX_PIXEL_MEM_SIZE              ((MAX_SCREEN_SIZE_H * MAX_SCREEN_SIZE_V * ADJUSTED_MAX_BITS_PER_PIXEL ) / 8)
+#define MAX_FRAMEBUFFER_MEM_SIZE   	(MAX_PIXEL_MEM_SIZE + MAX_PALETTE_MEM_SIZE + 32)
+#define ALLOCATED_FB_MEM_SIZE           (PAGE_ALIGN (MAX_FRAMEBUFFER_MEM_SIZE + PAGE_SIZE * 2))
+
+#define SA1100_PALETTE_MEM_SIZE(bpp)	(((bpp)==8?256:16)*2)
+#define SA1100_PALETTE_MODE_VAL(bpp)    (((bpp) & 0x018) << 9)
+
+/* Minimum X and Y resolutions */
+#define MIN_XRES	64
+#define MIN_YRES	64
+
+/* Possible controller_state modes */
+#define LCD_MODE_DISABLED		0    // Controller is disabled and Disable Done received
+#define LCD_MODE_DISABLE_BEFORE_ENABLE	1    // Re-enable after Disable Done IRQ is received
+#define LCD_MODE_ENABLED		2    // Controller is enabled
+
+#define SA1100_NAME	"SA1100"
+#define NR_MONTYPES	1
+
+static u_char *VideoMemRegion = NULL;
+static u_char *VideoMemRegion_phys = NULL;
+
+/* Local LCD controller parameters */
+/* These can be reduced by making better use of fb_var_screeninfo parameters.  */
+/* Several duplicates exist in the two structures. */
+struct sa1100fb_par {
+	u_char         	*p_screen_base;
+	u_char         	*v_screen_base;
+	u_short        	*p_palette_base;
+	u_short        	*v_palette_base;
+	unsigned long	 screen_size;
+	unsigned int	 palette_size;
+        unsigned int   	 xres;
+        unsigned int   	 yres;
+        unsigned int   	 xres_virtual;
+        unsigned int   	 yres_virtual;
+        unsigned int   	 bits_per_pixel;
+	  signed int	 montype;
+	unsigned int	 currcon;
+        unsigned int   	 visual;
+	unsigned int	 allow_modeset	: 1;
+	unsigned int   	 active_lcd     : 1;
+	volatile u_char	 controller_state;
+};
+
+/* Shadows for LCD controller registers */
+struct sa1100fb_lcd_reg {
+	Address	dbar1;
+	Word	lccr0;
+	Word	lccr1;
+	Word	lccr2;
+	Word	lccr3;
+};
+
+/* Fake monspecs to fill in fbinfo structure */
+static struct fb_monspecs monspecs __initdata = {
+	 30000, 70000, 50, 65, 0 	/* Generic */
+};
+
+static struct display global_disp;            /* Initial (default) Display Settings */
+static struct fb_info fb_info;
+static struct sa1100fb_par current_par;
+static struct fb_var_screeninfo __initdata init_var = {};
+static struct sa1100fb_lcd_reg lcd_shadow;
+
+
+static int  sa1100fb_open(struct fb_info *info, int user);
+static int  sa1100fb_release(struct fb_info *info, int user);
+static int  sa1100fb_get_fix(struct fb_fix_screeninfo *fix, int con, struct fb_info *info);
+static int  sa1100fb_ioctl(struct inode *ino, struct file *file, unsigned int cmd,
+	       		  unsigned long arg, int con, struct fb_info *info);
+static int  sa1100fb_get_var(struct fb_var_screeninfo *var, int con, struct fb_info *info);
+static int  sa1100fb_set_var(struct fb_var_screeninfo *var, int con, struct fb_info *info);
+static int  sa1100fb_get_cmap(struct fb_cmap *cmap, int kspc, int con, struct fb_info *info);
+static int  sa1100fb_set_cmap(struct fb_cmap *cmap, int kspc, int con, struct fb_info *info);
+static int  sa1100fb_pan_display(struct fb_var_screeninfo *var, int con, struct fb_info *info);
+ 
+static int  sa1100fb_switch(int con, struct fb_info *info);
+static void sa1100fb_blank(int blank, struct fb_info *info);
+static int  sa1100fb_map_video_memory(void);
+static int  sa1100fb_activate_var(struct fb_var_screeninfo *var);
+static void sa1100fb_enable_lcd_controller(void);
+static void sa1100fb_disable_lcd_controller(void);
+
+static struct fb_ops sa1100fb_ops = {
+	sa1100fb_open,
+	sa1100fb_release,
+	sa1100fb_get_fix,		      
+	sa1100fb_get_var,		      
+	sa1100fb_set_var,		      
+	sa1100fb_get_cmap,		      
+	sa1100fb_set_cmap,		      
+	sa1100fb_pan_display,		      
+	sa1100fb_ioctl			      
+};
+
+
+
+/*
+ * sa1100fb_palette_write:
+ *    Write palette data to the LCD frame buffer's palette area
+ */
+static inline void
+sa1100fb_palette_write(u_int regno, u_short pal)
+{
+	current_par.v_palette_base[regno] = (regno ? pal : pal | 
+	                                     SA1100_PALETTE_MODE_VAL(current_par.bits_per_pixel));
+}
+
+
+static inline u_short
+sa1100fb_palette_encode(u_int regno, u_int red, u_int green, u_int blue, u_int trans)
+{
+	u_short pal;
+
+
+	if(current_par.bits_per_pixel == 4){
+		/*
+		 * RGB -> luminance is defined to be
+		 * Y =  0.299 * R + 0.587 * G + 0.114 * B
+		 */
+		pal = ((19595 * red + 38470 * green + 7471 * blue) >> 28) & 0x00f;
+#ifdef REVERSE_VIDEO_4BIT
+		pal = 15 - pal;
+#endif
+	}
+	else{
+		pal   = ((red   >>  4) & 0xf00);
+		pal  |= ((green >>  8) & 0x0f0);
+		pal  |= ((blue  >> 12) & 0x00f);
+	}
+
+	return pal;
+}
+	    
+static inline u_short
+sa1100fb_palette_read(u_int regno)
+{
+	return (current_par.v_palette_base[regno] & 0x0FFF);
+}
+
+
+static void
+sa1100fb_palette_decode(u_int regno, u_int *red, u_int *green, u_int *blue, u_int *trans)
+{
+	u_short pal;
+
+	pal = sa1100fb_palette_read(regno);
+
+	if( current_par.bits_per_pixel == 4){
+#ifdef REVERSE_VIDEO_4BIT
+		pal = 15 - pal;
+#endif
+		pal &= 0x000f;
+		pal |= pal << 4;
+		pal |= pal << 8;
+		*blue = *green = *red = pal;
+	}
+	else{
+		*blue   = (pal & 0x000f) << 12;
+		*green  = (pal & 0x00f0) << 8;
+		*red    = (pal & 0x0f00) << 4;
+	}
+        *trans  = 0;
+}
+
+static int
+sa1100fb_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue, u_int *trans, struct fb_info *info)
+{
+	if (regno >= current_par.palette_size)
+		return 1;
+	
+	sa1100fb_palette_decode(regno, red, green, blue, trans);
+
+	return 0;
+}
+
+
+static int
+sa1100fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, u_int trans, struct fb_info *info)
+{
+	u_short pal;
+
+	if (regno >= current_par.palette_size)
+		return 1;
+
+	pal = sa1100fb_palette_encode(regno, red, green, blue, trans);
+
+	sa1100fb_palette_write(regno, pal);
+
+	return 0;
+}
+
+static int
+sa1100fb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
+		 struct fb_info *info)
+{
+	int err = 0;
+
+	if (con == current_par.currcon)
+		err = fb_get_cmap(cmap, kspc, sa1100fb_getcolreg, info);
+	else if (fb_display[con].cmap.len)
+		fb_copy_cmap(&fb_display[con].cmap, cmap, kspc ? 0 : 2);
+	else
+		fb_copy_cmap(fb_default_cmap(current_par.palette_size),
+			     cmap, kspc ? 0 : 2);
+	return err;
+}
+
+static int
+sa1100fb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
+		 struct fb_info *info)
+{
+	int err = 0;
+
+	if (!fb_display[con].cmap.len)
+		err = fb_alloc_cmap(&fb_display[con].cmap,
+
+				    current_par.palette_size, 0);
+	if (!err) {
+		if (con == current_par.currcon)
+			err = fb_set_cmap(cmap, kspc, sa1100fb_setcolreg,
+					  info);
+		fb_copy_cmap(cmap, &fb_display[con].cmap, kspc ? 0 : 1);
+	}
+	return err;
+}
+
+static void inline
+sa1100fb_get_par(struct sa1100fb_par *par)
+{
+	*par = current_par;
+}
+
+
+/*
+ * sa1100fb_encode_var():
+ * 	Modify var structure using values in par
+ */
+static int 
+sa1100fb_encode_var(struct fb_var_screeninfo *var,
+                    struct sa1100fb_par *par)
+{
+        // Don't know if really want to var on entry.
+        // Look at set_var to see.  If so, may need to add extra params to par     
+//	memset(var, 0, sizeof(struct fb_var_screeninfo));
+ 
+	var->xres = par->xres;
+	var->yres = par->yres;
+	var->xres_virtual = par->xres_virtual;
+	var->yres_virtual = par->yres_virtual;
+
+	var->bits_per_pixel = par->bits_per_pixel;
+
+	switch(var->bits_per_pixel) {
+	case 2:
+	case 4:
+	case 8:
+		var->red.length	   = 4;
+		var->green         = var->red;
+		var->blue          = var->red;
+		var->transp.length = 0;
+		break;
+	case 12:          // This case should differ for Active/Passive mode  
+	case 16:
+        	var->red.length    = 
+        	var->blue.length   =
+        	var->green.length  = 5;
+        	var->transp.length = 0;
+        	var->red.offset    = 10;
+        	var->green.offset  = 5;
+        	var->blue.offset   = 0;
+        	var->transp.offset = 0;
+		break;
+	}
+	return 0;
+}
+ 
+/*
+ *  sa1100fb_decode_var():
+ *    Get the video params out of 'var'. If a value doesn't fit, round it up,
+ *    if it's too big, return -EINVAL.
+ *
+ *    Suggestion: Round up in the following order: bits_per_pixel, xres,
+ *    yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
+ *    bitfields, horizontal timing, vertical timing.
+ */
+static int
+sa1100fb_decode_var(struct fb_var_screeninfo *var, 
+                    struct sa1100fb_par *par)
+{
+	u_long palette_mem_phys;
+	u_long palette_mem_size;
+
+	*par = current_par;
+
+	if ((par->xres = var->xres) < MIN_XRES)
+		par->xres = MIN_XRES; 
+	if ((par->yres = var->yres) < MIN_YRES)
+		par->yres = MIN_YRES;
+        if (par->xres > MAX_SCREEN_SIZE_H)
+        	par->xres = MAX_SCREEN_SIZE_H;
+        if (par->yres > MAX_SCREEN_SIZE_V)
+                par->yres = MAX_SCREEN_SIZE_V; 
+        par->xres_virtual = 
+		var->xres_virtual < par->xres ? par->xres : var->xres_virtual;
+        par->yres_virtual = 
+		var->yres_virtual < par->yres ? par->yres : var->yres_virtual;
+        par->bits_per_pixel = var->bits_per_pixel;
+
+	switch (par->bits_per_pixel) {
+#ifdef FBCON_HAS_CFB4
+        case 4:
+		par->visual = FB_VISUAL_PSEUDOCOLOR;
+		par->palette_size = 16; 
+                break;
+#endif
+#ifdef FBCON_HAS_CFB8
+	case 8:
+		par->visual = FB_VISUAL_PSEUDOCOLOR;
+		par->palette_size = 256; 
+		break;
+#endif
+#ifdef FBCON_HAS_CFB16
+	case 16:  /* RGB 555 */
+		par->visual = FB_VISUAL_TRUECOLOR;
+		par->palette_size = -1; 
+		break;
+#endif
+	default:
+		return -EINVAL;
+	}
+
+	palette_mem_size  = SA1100_PALETTE_MEM_SIZE(par->bits_per_pixel);
+	palette_mem_phys  = (u_long)VideoMemRegion_phys + PAGE_SIZE - 
+	                    palette_mem_size;
+	par->p_palette_base  = (u_short *)palette_mem_phys;
+        par->v_palette_base  = (u_short *)((u_long)VideoMemRegion + PAGE_SIZE - palette_mem_size);
+	par->p_screen_base   = (u_char *)((u_long)VideoMemRegion_phys + PAGE_SIZE); 
+	par->v_screen_base   = (u_char *)((u_long)VideoMemRegion      + PAGE_SIZE); 
+ 
+        DPRINTK("p_palette_base = 0x%08lx\n",(u_long)par->p_palette_base);
+        DPRINTK("v_palette_base = 0x%08lx\n",(u_long)par->v_palette_base);
+        DPRINTK("p_screen_base  = 0x%08lx\n",(u_long)par->p_screen_base);
+        DPRINTK("v_screen_base  = 0x%08lx\n",(u_long)par->v_screen_base);
+        DPRINTK("VideoMemRegion = 0x%08lx\n",(u_long)VideoMemRegion);
+        DPRINTK("VideoMemRegion_phys = 0x%08lx\n",(u_long)VideoMemRegion_phys);
+	return 0;
+}
+
+static int
+sa1100fb_get_var(struct fb_var_screeninfo *var, int con, struct fb_info *info)
+{
+ 	struct sa1100fb_par par;
+
+	if (con == -1) {
+                sa1100fb_get_par(&par);
+                sa1100fb_encode_var(var, &par);
+	} else
+		*var = fb_display[con].var;
+
+	return 0;
+}
+
+/*
+ * sa1100fb_set_var():
+ *	Set the user defined part of the display for the specified console
+ */
+static int
+sa1100fb_set_var(struct fb_var_screeninfo *var, int con, struct fb_info *info)
+{
+	struct display *display;
+	int err, chgvar = 0;
+        struct sa1100fb_par par;
+
+	if (con >= 0)
+		display = &fb_display[con]; /* Display settings for console */
+	else
+		display = &global_disp;     /* Default display settings */
+
+
+	DPRINTK("xres = %d, yres = %d\n",var->xres, var->yres);
+        // Decode var contents into a par structure, adjusting any
+        // out of range values.  
+	if ((err = sa1100fb_decode_var(var, &par)))
+		return err;
+        // Store adjusted par values into var structure
+        sa1100fb_encode_var(var, &par);
+       
+        if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_TEST)
+		return 0;
+        else if (((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_NOW) && 
+                 ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_NXTOPEN))
+             	return -EINVAL;
+
+	if (con >= 0) {
+		if ((display->var.xres != var->xres) ||
+		    (display->var.yres != var->yres) ||
+		    (display->var.xres_virtual != var->xres_virtual) ||
+		    (display->var.yres_virtual != var->yres_virtual) ||
+		    (display->var.sync != var->sync)                 ||
+                    (display->var.bits_per_pixel != var->bits_per_pixel) ||
+		    (memcmp(&display->var.red, &var->red, sizeof(var->red))) ||
+		    (memcmp(&display->var.green, &var->green, sizeof(var->green))) ||
+		    (memcmp(&display->var.blue, &var->blue, sizeof(var->blue)))) 
+			chgvar = 1;
+	}
+
+	display->var = *var;
+	display->screen_base	= par.v_screen_base;
+	display->visual		= par.visual;
+	display->type		= FB_TYPE_PACKED_PIXELS;
+	display->type_aux	= 0;
+	display->ypanstep	= 0;
+	display->ywrapstep	= 0;
+	display->line_length	= 
+	display->next_line      = (var->xres * var->bits_per_pixel) / 8;
+
+	display->can_soft_blank	= 1;
+	display->inverse	= 0;
+
+	switch (display->var.bits_per_pixel) {
+#ifdef FBCON_HAS_CFB4
+        case 4:
+		display->dispsw = &fbcon_cfb4;
+		break;
+#endif
+#ifdef FBCON_HAS_CFB8
+	case 8: 
+		display->dispsw = &fbcon_cfb8;
+		break;
+#endif
+#ifdef FBCON_HAS_CFB16
+	case 16:
+		display->dispsw = &fbcon_cfb16;
+		break;
+#endif
+	default:
+		display->dispsw = &fbcon_dummy;
+		break;
+	}
+
+        // If the console has changed and the console has defined
+        // a changevar function, call that function.
+	if (chgvar && info && info->changevar)
+		info->changevar(con);
+
+        // If the current console is selected, update the palette 
+	if (con == current_par.currcon) 
+        {
+		struct fb_cmap *cmap;
+
+		current_par = par;
+		if (display->cmap.len)
+			cmap = &display->cmap;
+		else
+			cmap = fb_default_cmap(current_par.palette_size);
+
+		fb_set_cmap(cmap, 1, sa1100fb_setcolreg, info);
+
+               	sa1100fb_activate_var(var);
+	}
+	return 0;
+}
+
+static int
+sa1100fb_updatevar(int con, struct fb_info *info)
+{
+	DPRINTK("entered\n");
+	return 0;
+}
+
+static int
+sa1100fb_get_fix(struct fb_fix_screeninfo *fix, int con, struct fb_info *info)
+{
+	struct display *display;
+
+	memset(fix, 0, sizeof(struct fb_fix_screeninfo));
+	strcpy(fix->id, SA1100_NAME);
+
+	if (con >= 0)
+	{
+		DPRINTK("Using console specific display for con=%d\n",con);
+		display = &fb_display[con];  /* Display settings for console */
+	}
+	else
+		display = &global_disp;      /* Default display settings */
+
+	fix->smem_start	 = current_par.p_screen_base;
+	fix->smem_len	 = current_par.screen_size;
+	fix->type	 = display->type;
+	fix->type_aux	 = display->type_aux;
+	fix->xpanstep	 = 0;
+	fix->ypanstep	 = display->ypanstep;
+	fix->ywrapstep	 = display->ywrapstep;
+	fix->visual	 = display->visual;
+	fix->line_length = display->line_length;
+	fix->accel	 = FB_ACCEL_NONE;
+
+	return 0;
+}
+
+
+static void
+__init sa1100fb_init_fbinfo(void)
+{
+	strcpy(fb_info.modename, SA1100_NAME);
+	strcpy(fb_info.fontname, "Acorn8x8");
+
+	fb_info.node		   = -1;
+	fb_info.flags		   = FBINFO_FLAG_DEFAULT;
+	fb_info.fbops		   = &sa1100fb_ops;
+        fb_info.monspecs           = monspecs;
+	fb_info.disp		   = &global_disp;
+	fb_info.changevar	   = NULL;
+	fb_info.switch_con	   = sa1100fb_switch;
+	fb_info.updatevar	   = sa1100fb_updatevar;
+	fb_info.blank		   = sa1100fb_blank;
+
+	/*
+	 * setup initial parameters
+	 */
+	memset(&init_var, 0, sizeof(init_var));
+
+	init_var.xres		   = DEFAULT_XRES;		
+	init_var.yres		   = DEFAULT_YRES;              
+	init_var.xres_virtual      = init_var.xres;
+	init_var.yres_virtual      = init_var.yres;
+	init_var.xoffset           = 0;
+	init_var.yoffset           = 0;
+	init_var.bits_per_pixel	   = DEFAULT_BPP;
+			
+	init_var.transp.length	   = 0;
+	init_var.nonstd		   = 0;
+	init_var.activate	   = FB_ACTIVATE_NOW;
+	init_var.height		   = -1;
+	init_var.width		   = -1;
+	init_var.vmode		   = FB_VMODE_NONINTERLACED;
+
+#if defined(CONFIG_SA1100_PENNY)
+	init_var.red.length	   = 4;				
+	init_var.green		   = init_var.red;
+	init_var.blue		   = init_var.red;
+	init_var.sync              = 0;
+#elif defined(CONFIG_SA1100_BRUTUS)
+	init_var.red.length	   = 4;				
+	init_var.green		   = init_var.red;
+	init_var.blue		   = init_var.red;
+	init_var.sync              = 0;
+#elif defined(CONFIG_SA1100_THINCLIENT)
+	init_var.red.length	   = 4;				
+	init_var.green		   = init_var.red;
+	init_var.blue		   = init_var.red;
+	init_var.sync              = 0;
+#elif defined(CONFIG_SA1100_TIFON)
+	init_var.red.length	   = 4;				
+	init_var.green		   = init_var.red;
+	init_var.blue		   = init_var.red;
+	init_var.grayscale         = 1;
+        init_var.pixclock	   = 150000;	
+        init_var.left_margin	   = 20;
+        init_var.right_margin	   = 255;
+        init_var.upper_margin	   = 20;
+        init_var.lower_margin	   = 0;
+        init_var.hsync_len	   = 2;
+        init_var.vsync_len	   = 1;
+	init_var.sync              = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT;
+        init_var.vmode		   = 0;
+#elif defined(CONFIG_SA1100_LART)
+	init_var.red.length	   = 4;				
+	init_var.green		   = init_var.red;
+	init_var.blue		   = init_var.red;
+	init_var.grayscale	   = 1;
+	init_var.pixclock	   = 150000;	
+	init_var.sync		   = 0;
+#endif
+
+	current_par.montype	   = -1;
+	current_par.currcon	  = -1;
+	current_par.allow_modeset =  1;
+	current_par.controller_state = LCD_MODE_DISABLED;
+}
+
+
+
+/*
+ * sa1100fb_map_video_memory():
+ *      Allocates the DRAM memory for the frame buffer.  This buffer is  
+ *	remapped into a non-cached, non-buffered, memory region to  
+ *      allow palette and pixel writes to occur without flushing the 
+ *      cache.  Once this area is remapped, all virtual memory
+ *      access to the video memory should occur at the new region.
+ */
+static int
+__init sa1100fb_map_video_memory(void)
+{
+	u_int  required_pages;
+	u_int  extra_pages;
+	u_int  order;
+        u_int  i;
+        char   *allocated_region;
+
+	if (VideoMemRegion != NULL)
+		return -EINVAL;
+
+	/* Find order required to allocate enough memory for framebuffer */
+	required_pages = ALLOCATED_FB_MEM_SIZE >> PAGE_SHIFT;
+        for (order = 0 ; required_pages >> order ; order++) {;}
+        extra_pages = (1 << order) - required_pages;
+
+        if ((allocated_region = 
+             (char *)__get_free_pages(GFP_KERNEL | GFP_DMA, order)) == NULL)
+           return -ENOMEM;
+
+        VideoMemRegion = (u_char *)allocated_region + (extra_pages << PAGE_SHIFT); 
+        VideoMemRegion_phys = (u_char *)__virt_to_phys((u_long)VideoMemRegion);
+
+	/* Free all pages that we don't need but were given to us because */
+	/* __get_free_pages() works on powers of 2. */
+	for (;extra_pages;extra_pages--)
+          free_page((u_int)allocated_region + ((extra_pages-1) << PAGE_SHIFT));
+
+        /* Set reserved flag for fb memory to allow it to be remapped into */
+        /* user space by the common fbmem driver using remap_page_range(). */                             
+        for(i = MAP_NR(VideoMemRegion);                                  
+            i < MAP_NR(VideoMemRegion + ALLOCATED_FB_MEM_SIZE); i++) 
+          set_bit(PG_reserved, &mem_map[i].flags);
+
+	/* Remap the fb memory to a non-buffered, non-cached region */
+	VideoMemRegion = (u_char *)__ioremap((u_long)VideoMemRegion_phys,
+					     ALLOCATED_FB_MEM_SIZE,
+					     L_PTE_PRESENT  |
+					     L_PTE_YOUNG    |
+					     L_PTE_DIRTY    |
+					     L_PTE_WRITE);
+	return (VideoMemRegion == NULL ? -EINVAL : 0);
+}
+
+static const int frequency[16] = {
+	59000000,
+        73700000,
+        88500000,
+        103200000,
+        118000000,
+        132700000,
+        147500000,
+        162200000,
+        176900000,
+        191700000,
+        206400000, 
+	230000000,
+	245000000,
+	260000000,
+	275000000,
+	290000000
+};
+
+
+static int get_pcd(unsigned int pixclock)
+{
+	unsigned int pcd;
+	pcd = frequency[PPCR &0xf] / 1000;
+	pcd *= pixclock/1000;
+	return pcd / 10000000 * 12;
+	/* the last multiplication by 1.2 is to handle */
+	/* sync problems */
+}
+
+/*
+ * sa1100fb_activate_var():
+ *	Configures LCD Controller based on entries in var parameter.  Settings are      
+ *      only written to the controller if changes were made.  
+ */
+static int
+sa1100fb_activate_var(struct fb_var_screeninfo *var)
+{						       
+	u_long	flags;
+	int pcd = get_pcd(var->pixclock);
+
+	if (current_par.p_palette_base == NULL)
+		return -EINVAL;
+
+	/* Disable interrupts and save status */
+	save_flags_cli(flags);		// disable the interrupts and save flags
+
+	/* Reset the LCD Controller's DMA address if it has changed */
+  	lcd_shadow.dbar1 = (Address)current_par.p_palette_base;
+
+#if defined(CONFIG_SA1100_PENNY) 
+	DPRINTK("Configuring  SA1100 LCD\n");
+
+	DPRINTK("Configuring xres = %d, yres = %d\n",var->xres, var->yres);
+
+  	lcd_shadow.lccr0 = LCCR0_LEN + LCCR0_Color + LCCR0_Sngl + LCCR0_Act + 
+  	                   LCCR0_LtlEnd + LCCR0_LDM + LCCR0_BAM + LCCR0_ERM + 
+  	                   LCCR0_DMADel(0); 
+  	lcd_shadow.lccr1 = LCCR1_DisWdth(var->xres) + LCCR1_HorSnchWdth (65) +
+  	                   LCCR1_EndLnDel (43) + LCCR1_BegLnDel(43) ;
+  	lcd_shadow.lccr2 = LCCR2_DisHght (var->yres) + LCCR2_VrtSnchWdth (35) + 
+  	                   LCCR2_EndFrmDel (0) + LCCR2_BegFrmDel (0) ;
+  	lcd_shadow.lccr3 = LCCR3_PixClkDiv(16) +
+  	                   LCCR3_ACBsDiv (2) + LCCR3_ACBsCntOff +
+		           ((var->sync & FB_SYNC_HOR_HIGH_ACT) ?LCCR3_HorSnchH:LCCR3_HorSnchL) +
+		           ((var->sync & FB_SYNC_VERT_HIGH_ACT)?LCCR3_VrtSnchH:LCCR3_VrtSnchL);
+       
+#elif defined(CONFIG_SA1100_BRUTUS) 
+  	DPRINTK("Configuring  BRUTUS LCD\n");
+	lcd_shadow.lccr0 = LCCR0_LEN + LCCR0_Color + LCCR0_Sngl + LCCR0_Pas + 
+	                   LCCR0_LtlEnd + LCCR0_LDM + LCCR0_BAM + LCCR0_ERM + 
+	                   LCCR0_DMADel(0);
+  	lcd_shadow.lccr1 = LCCR1_DisWdth(var->xres) + LCCR1_HorSnchWdth(4) + 
+  	                   LCCR1_BegLnDel(41) + LCCR1_EndLnDel(101);
+  	lcd_shadow.lccr2 = LCCR2_DisHght(var->yres) + LCCR2_VrtSnchWdth(1) + 
+  	                   LCCR2_BegFrmDel(0) + LCCR2_EndFrmDel(0);
+  	lcd_shadow.lccr3 = LCCR3_OutEnH + LCCR3_PixFlEdg + LCCR3_VrtSnchH + LCCR3_HorSnchH +
+  	                    LCCR3_ACBsCntOff + LCCR3_ACBsDiv(2) + LCCR3_PixClkDiv(44);
+#elif defined(CONFIG_SA1100_THINCLIENT) 
+	DPRINTK("Configuring ThinClient LCD\n");
+	DPRINTK("Configuring xres = %d, yres = %d\n",var->xres, var->yres);
+
+        lcd_shadow.lccr0 = LCCR0_LEN + LCCR0_Color + LCCR0_Sngl + 
+                           LCCR0_Act;
+  	lcd_shadow.lccr1 = LCCR1_DisWdth(var->xres) +LCCR1_HorSnchWdth(10)+
+  	                   LCCR1_EndLnDel (81) + LCCR1_BegLnDel(81) ;
+  	lcd_shadow.lccr2 = LCCR2_DisHght (var->yres) +LCCR2_VrtSnchWdth(9) + 
+  	                   LCCR2_EndFrmDel (20) + LCCR2_BegFrmDel (20) ;
+  	lcd_shadow.lccr3 = LCCR3_PixClkDiv(6) +
+  	                   LCCR3_ACBsDiv (2) + LCCR3_ACBsCntOff +
+                           LCCR3_HorSnchL + LCCR3_VrtSnchL;
+              
+#elif defined(CONFIG_SA1100_TIFON) 
+	DPRINTK("Configuring TIFON LCD\n");
+
+	lcd_shadow.lccr0 = LCCR0_LEN + LCCR0_Mono + LCCR0_Sngl + LCCR0_Pas +
+		           LCCR0_BigEnd + LCCR0_LDM + LCCR0_BAM + LCCR0_ERM + 
+		           LCCR0_8PixMono + LCCR0_DMADel(0);
+	lcd_shadow.lccr1 = LCCR1_DisWdth( var->xres ) +
+		           LCCR1_HorSnchWdth( var->hsync_len) +
+		           LCCR1_BegLnDel( var->left_margin) +
+		           LCCR1_EndLnDel( var->right_margin);
+	lcd_shadow.lccr2 = LCCR2_DisHght( var->yres ) +
+		           LCCR2_VrtSnchWdth( var->vsync_len )+
+		           LCCR2_BegFrmDel( var->upper_margin ) +
+		           LCCR2_EndFrmDel( var->lower_margin );
+	lcd_shadow.lccr3 = LCCR3_PixClkDiv( pcd ) +
+		           LCCR3_ACBsDiv( 512 ) +
+		           LCCR3_ACBsCnt(0) +
+			   LCCR3_HorSnchH + LCCR3_VrtSnchH;
+	/*
+		           ((current_var.sync & FB_SYNC_HOR_HIGH_ACT) ?
+		           LCCR3_HorSnchH : LCCR3_HorSnchL) +
+		           ((current_var.sync & FB_SYNC_VERT_HIGH_ACT) ?
+		           LCCR3_VrtSnchH : LCCR3_VrtSnchL);
+	*/
+#elif defined(CONFIG_SA1100_LART) 
+  	DPRINTK("Configuring LART LCD\n");
+
+	lcd_shadow.lccr0 = LCCR0_LEN + LCCR0_Mono + LCCR0_Sngl + LCCR0_Pas +
+		           LCCR0_LtlEnd + LCCR0_LDM + LCCR0_BAM + LCCR0_ERM + 
+		           LCCR0_DMADel(0);
+	lcd_shadow.lccr1 = LCCR1_DisWdth( var->xres ) +
+		           LCCR1_HorSnchWdth( 2 ) +
+		           LCCR1_BegLnDel( 4 ) +
+		           LCCR1_EndLnDel( 2 );
+	lcd_shadow.lccr2 = LCCR2_DisHght( var->yres ) +
+		           LCCR2_VrtSnchWdth( 1 )+
+		           LCCR2_BegFrmDel( 0 ) +
+		           LCCR2_EndFrmDel( 0 );
+	lcd_shadow.lccr3 = LCCR3_PixClkDiv( 34 ) +
+		           LCCR3_ACBsDiv( 512 ) +
+		           LCCR3_ACBsCntOff +
+		           LCCR3_HorSnchH +
+		           LCCR3_VrtSnchH;
+#endif
+
+       /* Restore status of interrupts */
+       restore_flags(flags);
+
+
+	if (( LCCR0 != lcd_shadow.lccr0 ) ||
+	    ( LCCR1 != lcd_shadow.lccr1 ) ||
+	    ( LCCR2 != lcd_shadow.lccr2 ) ||
+            ( LCCR3 != lcd_shadow.lccr3 ) ||
+	    ( DBAR1 != lcd_shadow.dbar1 ))
+	{
+		sa1100fb_enable_lcd_controller();
+	}
+
+  	return 0;
+}
+
+
+/*
+ *  sa1100fb_inter_handler():
+ *	Interrupt handler for LCD controller.  Processes disable done interrupt (LDD)
+ *      to reenable controller if controller was disabled to change register values.
+ */
+static void sa1100fb_inter_handler(int irq, void *dev_id, struct pt_regs *regs)
+{
+        if (LCSR & LCSR_LDD) {
+	        /* Disable Done Flag is set */
+		LCCR0 |= LCCR0_LDM;	      /* Mask LCD Disable Done Interrupt */
+		current_par.controller_state = LCD_MODE_DISABLED;
+		if (current_par.controller_state == LCD_MODE_DISABLE_BEFORE_ENABLE) {
+			sa1100fb_enable_lcd_controller();
+		}
+	}
+	LCSR = 0;		      /* Clear LCD Status Register */
+}
+
+
+/*
+ *  sa1100fb_disable_lcd_controller():
+ *    	Disables LCD controller by and enables LDD interrupt.  The controller_state
+ *      is not changed until the LDD interrupt is received to indicate the current
+ *      frame has completed.  Platform specific hardware disabling is also included.
+ */
+static void sa1100fb_disable_lcd_controller(void)
+{
+	DPRINTK("sa1100fb:  Disabling LCD controller\n");
+
+	/* Exit if already LCD disabled, or LDD IRQ unmasked */
+	if ((current_par.controller_state == LCD_MODE_DISABLED) ||
+	    (!(LCCR0 & LCCR0_LDM))) {
+		DPRINTK("sa1100fb: LCD already disabled\n");
+		return;
+	}
+
+#if defined(CONFIG_SA1100_PENNY)
+  	FpgaLcdCS1 = 0x000;	      /* LCD Backlight to 0%    */
+  	FpgaPortI  &= ~LCD_ON;        /* Turn off LCD Backlight */
+#elif defined(CONFIG_SA1100_TIFON)
+	GPCR = GPIO_GPIO(24);         /* turn off display */
+#endif
+	
+	LCSR = 0;		      /* Clear LCD Status Register */
+	LCCR0 &= ~(LCCR0_LDM);	      /* Enable LCD Disable Done Interrupt */
+	enable_irq(IRQ_LCD);	      /* Enable LCD IRQ */
+	LCCR0 &= ~(LCCR0_LEN);	      /* Disable LCD Controller */
+
+}
+
+/*
+ *  sa1100fb_enable_lcd_controller():
+ *    	Enables LCD controller.  If the controller is already enabled, it is first disabled.
+ *      This forces all changes to the LCD controller registers to be done when the 
+ *      controller is disabled.  Platform specific hardware enabling is also included.
+ */
+static void sa1100fb_enable_lcd_controller(void)
+{
+	u_long	flags;
+
+	save_flags_cli(flags);		
+
+        /* Disable controller before changing parameters */
+	if (current_par.controller_state == LCD_MODE_ENABLED) 	{
+		current_par.controller_state = LCD_MODE_DISABLE_BEFORE_ENABLE;
+		sa1100fb_disable_lcd_controller();
+	} else {
+		DPRINTK("sa1100fb: Enabling LCD controller\n");
+
+		/* Make sure the mode bits are present in the first palette entry */
+		current_par.v_palette_base[0] &= 0x0FFF; 	           
+		current_par.v_palette_base[0] |= SA1100_PALETTE_MODE_VAL(current_par.bits_per_pixel); 	 
+
+		/* disable the interrupts and save flags */
+		save_flags_cli(flags);		
+
+		DBAR1 = lcd_shadow.dbar1;
+		LCCR3 = lcd_shadow.lccr3;
+		LCCR2 = lcd_shadow.lccr2;
+		LCCR1 = lcd_shadow.lccr1;
+		LCCR0 = lcd_shadow.lccr0;
+
+#if defined(CONFIG_SA1100_PENNY)
+		FpgaLcdCS1 = 0x0FF;	       /* LCD Backlight to 100% */
+		FpgaPortI  |= LCD_ON;          /* Turn on LCD Backlight */
+#elif defined(CONFIG_SA1100_TIFON)
+		GPCR = GPIO_GPIO(24);          /* cycle on/off-switch */
+		udelay(150);
+		GPSR = GPIO_GPIO(24);          /* turn on display */
+		udelay(150);
+		GPSR = GPIO_GPIO(24);          /* turn on display */
+#endif
+		current_par.controller_state = LCD_MODE_ENABLED;
+
+       		/* Restore status of interrupts */
+       }
+       restore_flags(flags);
+}
+
+
+
+static int
+sa1100fb_open(struct fb_info *info, int user)
+{
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+static int
+sa1100fb_release(struct fb_info *info, int user)
+{
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+
+static int
+sa1100fb_pan_display(struct fb_var_screeninfo *var, int con,
+		    struct fb_info *info)
+{
+	DPRINTK("entered\n");
+	return -EINVAL;
+}
+
+
+/*
+ * sa1100fb_blank():
+ *	Blank the display by setting all palette values to zero.  Note, the 
+ * 	12 and 16 bpp modes don't really use the palette, so this will not
+ *      blank the display in all modes.  
+ */
+static void
+sa1100fb_blank(int blank, struct fb_info *info)
+{
+	int i;
+
+	if (blank) {
+		for (i = 0; i < current_par.palette_size; i++)
+			sa1100fb_palette_write(i, sa1100fb_palette_encode(i, 0, 0, 0, 0));
+		sa1100fb_disable_lcd_controller();
+	}
+	else {
+		sa1100fb_set_cmap(&fb_display[current_par.currcon].cmap, 1, 
+		                  current_par.currcon, info); 
+		sa1100fb_enable_lcd_controller();
+	}
+}
+
+
+/*
+ *  sa1100fb_switch():       
+ *	Change to the specified console.  Palette and video mode
+ *      are changed to the console's stored parameters. 
+ */
+static int
+sa1100fb_switch(int con, struct fb_info *info)
+{
+	struct fb_cmap *cmap;
+
+	if (current_par.currcon >= 0) {
+                // Get the colormap for the selected console 
+		cmap = &fb_display[current_par.currcon].cmap;
+
+		if (cmap->len)
+			fb_get_cmap(cmap, 1, sa1100fb_getcolreg, info);
+	}
+
+	current_par.currcon = con;
+	fb_display[con].var.activate = FB_ACTIVATE_NOW;
+	sa1100fb_set_var(&fb_display[con].var, con, info);
+	return 0;
+}
+
+
+void __init sa1100fb_init(void)
+{
+        current_par.p_palette_base  = NULL;
+        current_par.v_palette_base  = NULL;
+        current_par.p_screen_base   = NULL;
+        current_par.v_screen_base   = NULL;
+        current_par.palette_size    = MAX_PALETTE_NUM_ENTRIES;
+        current_par.screen_size     = MAX_PIXEL_MEM_SIZE;
+
+#if defined(CONFIG_SA1100_PENNY)
+  	GPDR |= GPIO_GPDR_GFX;     /* GPIO Data Direction register for LCD data bits 8-11     */
+  	GAFR |= GPIO_GAFR_GFX;     /* GPIO Alternate Function register for LCD data bits 8-11 */
+#elif defined(CONFIG_SA1100_TIFON) 
+
+	GPDR = GPDR | GPIO_GPIO(24);  /* set GPIO24 to output */
+#endif
+
+	/* Initialize video memory */
+	if (sa1100fb_map_video_memory())
+	    return;
+
+	sa1100fb_init_fbinfo();
+	if (current_par.montype < 0 || current_par.montype > NR_MONTYPES)
+		current_par.montype = 1;
+
+	/* Request the interrupt in the init routine only because */ 
+	/* this driver will not be used as a module.              */ 
+	if (request_irq(IRQ_LCD, sa1100fb_inter_handler, SA_INTERRUPT, "SA1100 LCD", NULL)!= 0) {
+		DPRINTK("sa1100fb: failed in request_irq\n");
+	}
+	DPRINTK("sa1100fb: request_irq succeeded\n");
+	disable_irq(IRQ_LCD);
+
+	if (sa1100fb_set_var(&init_var, -1, &fb_info))
+		current_par.allow_modeset = 0;
+	sa1100fb_decode_var(&init_var, &current_par);
+
+	register_framebuffer(&fb_info);
+
+	/* This driver cannot be unloaded */
+	MOD_INC_USE_COUNT;
+}
+
+void __init sa1100fb_setup(char *options)
+{
+	if (!options || !*options)
+		return;
+
+	return; 
+}
+
+
+
+static int
+sa1100fb_ioctl(struct inode *ino, struct file *file, unsigned int cmd,
+	      unsigned long arg, int con, struct fb_info *info)
+{
+	return -ENOIOCTLCMD;
+}
+
+