patch-2.1.91 linux/drivers/video/virgefb.c

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diff -u --recursive --new-file v2.1.90/linux/drivers/video/virgefb.c linux/drivers/video/virgefb.c
@@ -0,0 +1,1190 @@
+/*
+ * linux/drivers/video/virgefb.c -- CyberVision64/3D frame buffer device
+ *
+ *    Copyright (C) 1997 André Heynatz
+ *
+ *
+ * This file is based on the CyberVision frame buffer device (cyberfb.c):
+ *
+ *    Copyright (C) 1996 Martin Apel
+ *                       Geert Uytterhoeven
+ *
+ * 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.
+ */
+
+#undef VIRGEFBDEBUG
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/malloc.h>
+#include <linux/delay.h>
+#include <linux/zorro.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <asm/pgtable.h>
+#include <asm/amigahw.h>
+
+#include "s3blit.h"
+#include "fbcon.h"
+#include "fbcon-cfb8.h"
+#include "fbcon-cfb16.h"
+
+
+#ifdef VIRGEFBDEBUG
+#define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
+#else
+#define DPRINTK(fmt, args...)
+#endif
+
+#define arraysize(x)    (sizeof(x)/sizeof(*(x)))
+
+#if 1
+#define vgawb_3d(reg,dat) \
+                (*((unsigned char *)(CyberVGARegs + (reg ^ 3))) = dat)
+#define vgaww_3d(reg,dat) \
+                (*((unsigned word *)(CyberVGARegs + (reg ^ 2))) = swab16(dat))
+#define vgawl_3d(reg,dat) \
+                (*((unsigned long *)(CyberVGARegs + reg)) = swab32(dat))
+#else
+     /*
+      * Dunno why this doesn't work at the moment - we'll have to look at
+      * it later.
+      */
+#define vgawb_3d(reg,dat) \
+                (*((unsigned char *)(CyberRegs + 0x8000 + reg)) = dat)
+#define vgaww_3d(reg,dat) \
+                (*((unsigned word *)(CyberRegs + 0x8000 + reg)) = dat)
+#define vgawl_3d(reg,dat) \
+                (*((unsigned long *)(CyberRegs + 0x8000 + reg)) = dat)
+#endif
+
+     /*
+      * We asume P5 mapped the big-endian version of these registers.
+      */
+#define wb_3d(reg,dat) \
+                (*((unsigned char volatile *)(CyberRegs + reg)) = dat)
+#define ww_3d(reg,dat) \
+                (*((unsigned word volatile *)(CyberRegs + reg)) = dat)
+#define wl_3d(reg,dat) \
+                (*((unsigned long volatile *)(CyberRegs + reg)) = dat)
+
+#define rl_3d(reg) \
+                (*((unsigned long volatile *)(CyberRegs + reg)))
+
+
+
+
+
+
+struct virgefb_par {
+   int xres;
+   int yres;
+   int bpp;
+};
+
+static struct virgefb_par current_par;
+
+static int current_par_valid = 0;
+static int currcon = 0;
+
+static struct display disp;
+static struct fb_info fb_info;
+
+
+/*
+ *    Switch for Chipset Independency
+ */
+
+static struct fb_hwswitch {
+
+   /* Initialisation */
+
+   int (*init)(void);
+
+   /* Display Control */
+
+   int (*encode_fix)(struct fb_fix_screeninfo *fix, struct virgefb_par *par);
+   int (*decode_var)(struct fb_var_screeninfo *var, struct virgefb_par *par);
+   int (*encode_var)(struct fb_var_screeninfo *var, struct virgefb_par *par);
+   int (*getcolreg)(u_int regno, u_int *red, u_int *green, u_int *blue,
+                    u_int *transp, struct fb_info *info);
+   int (*setcolreg)(u_int regno, u_int red, u_int green, u_int blue,
+                    u_int transp, struct fb_info *info);
+   void (*blank)(int blank);
+} *fbhw;
+
+
+/*
+ *    Frame Buffer Name
+ */
+
+static char virgefb_name[16] = "Cybervision/3D";
+
+
+/*
+ *    Cybervision Graphics Board
+ */
+
+#define VIRGE8_WIDTH 1152
+#define VIRGE8_HEIGHT 886
+#define VIRGE8_PIXCLOCK 12500    /* ++Geert: Just a guess */
+
+#if 0
+#define VIRGE16_WIDTH 800
+#define VIRGE16_HEIGHT 600
+#endif
+#define VIRGE16_PIXCLOCK 25000   /* ++Geert: Just a guess */
+
+
+static unsigned int CyberKey = 0;
+static unsigned char Cyber_colour_table [256][4];
+static unsigned long CyberMem;
+static unsigned long CyberSize;
+static volatile char *CyberRegs;
+static volatile unsigned long CyberVGARegs; /* ++Andre: for CV64/3D, see macros at the beginning */
+ 
+
+/*
+ *    Predefined Video Modes
+ */
+
+static struct fb_videomode virgefb_predefined[] __initdata = {
+    {
+	"640x480-8", {		/* Cybervision 8 bpp */
+	    640, 480, 640, 480, 0, 0, 8, 0,
+	    {0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
+	    0, 0, -1, -1, FB_ACCEL_NONE, VIRGE8_PIXCLOCK, 64, 96, 35, 12, 112, 2,
+	    FB_SYNC_COMP_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
+	}
+    }, {
+	"800x600-8", {		/* Cybervision 8 bpp */
+	    800, 600, 800, 600, 0, 0, 8, 0,
+	    {0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
+	    0, 0, -1, -1, FB_ACCEL_NONE, VIRGE8_PIXCLOCK, 64, 96, 35, 12, 112, 2,
+	    FB_SYNC_COMP_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
+	}
+    }, {
+	"1024x768-8", {		/* Cybervision 8 bpp */
+	    1024, 768, 1024, 768, 0, 0, 8, 0,
+	    {0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
+	    0, 0, -1, -1, FB_ACCEL_NONE, VIRGE8_PIXCLOCK, 64, 96, 35, 12, 112, 2,
+	    FB_SYNC_COMP_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
+	}
+    }, {
+	"1152x886-8", {		/* Cybervision 8 bpp */
+	    1152, 886, 1152, 886, 0, 0, 8, 0,
+	    {0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
+	    0, 0, -1, -1, FB_ACCEL_NONE, VIRGE8_PIXCLOCK, 64, 96, 35, 12, 112, 2,
+	    FB_SYNC_COMP_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
+	}
+    }, {
+	"1280x1024-8", {	/* Cybervision 8 bpp */
+	    1280, 1024, 1280, 1024, 0, 0, 8, 0,
+	    {0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
+	    0, 0, -1, -1, FB_ACCEL_NONE, VIRGE8_PIXCLOCK, 64, 96, 35, 12, 112, 2,
+	    FB_SYNC_COMP_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
+	}
+    }, {
+	"1600x1200-8", {	/* Cybervision 8 bpp */
+	    1600, 1200, 1600, 1200, 0, 0, 8, 0,
+	    {0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
+	    0, 0, -1, -1, FB_ACCEL_NONE, VIRGE8_PIXCLOCK, 64, 96, 35, 12, 112, 2,
+	    FB_SYNC_COMP_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
+	}
+    }, {
+	"800x600-16", {		/* Cybervision 16 bpp */
+	    800, 600, 800, 600, 0, 0, 16, 0,
+	    {11, 5, 0}, {5, 6, 0}, {0, 5, 0}, {0, 0, 0},
+	    0, 0, -1, -1, FB_ACCEL_NONE, VIRGE16_PIXCLOCK, 64, 96, 35, 12, 112, 2,
+	    FB_SYNC_COMP_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
+	}
+    }
+};
+
+
+#define NUM_TOTAL_MODES    arraysize(virgefb_predefined)
+
+
+static int Cyberfb_inverse = 0;
+#if 0
+static int Cyberfb_Cyber8 = 0;        /* Use Cybervision board */
+static int Cyberfb_Cyber16 = 0;       /* Use Cybervision board */
+#endif
+
+/*
+ *    Some default modes
+ */
+
+#define VIRGE8_DEFMODE     (0)
+#define VIRGE16_DEFMODE    (6)
+
+static struct fb_var_screeninfo virgefb_default;
+
+
+/*
+ *    Interface used by the world
+ */
+
+void virgefb_setup(char *options, int *ints);
+
+static int virgefb_open(struct fb_info *info);
+static int virgefb_release(struct fb_info *info);
+static int virgefb_get_fix(struct fb_fix_screeninfo *fix, int con, struct
+fb_info *info);
+static int virgefb_get_var(struct fb_var_screeninfo *var, int con, struct
+fb_info *info);
+static int virgefb_set_var(struct fb_var_screeninfo *var, int con, struct
+fb_info *info);
+static int virgefb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
+			    struct fb_info *info);
+static int virgefb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
+			    struct fb_info *info);
+static int virgefb_pan_display(struct fb_var_screeninfo *var, int con,
+			       struct fb_info *info);
+static int virgefb_ioctl(struct inode *inode, struct file *file, u_int cmd,
+                         u_long arg, int con, struct fb_info *info);
+
+
+/*
+ *    Interface to the low level console driver
+ */
+
+unsigned long virgefb_init(unsigned long mem_start);
+static int Cyberfb_switch(int con, struct fb_info *info);
+static int Cyberfb_updatevar(int con, struct fb_info *info);
+static void Cyberfb_blank(int blank, struct fb_info *info);
+
+
+/*
+ *    Text console acceleration
+ */
+
+#ifdef CONFIG_FBCON_CFB8
+static struct display_switch fbcon_virge8;
+#endif
+
+
+/*
+ *   Hardware Specific Routines
+ */
+
+static int Cyber_init(void);
+static int Cyber_encode_fix(struct fb_fix_screeninfo *fix,
+                          struct virgefb_par *par);
+static int Cyber_decode_var(struct fb_var_screeninfo *var,
+                          struct virgefb_par *par);
+static int Cyber_encode_var(struct fb_var_screeninfo *var,
+                          struct virgefb_par *par);
+static int Cyber_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue,
+                         u_int *transp, struct fb_info *info);
+static int Cyber_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+                         u_int transp, struct fb_info *info);
+static void Cyber_blank(int blank);
+
+
+/*
+ *    Internal routines
+ */
+
+static void virgefb_get_par(struct virgefb_par *par);
+static void virgefb_set_par(struct virgefb_par *par);
+static int do_fb_set_var(struct fb_var_screeninfo *var, int isactive);
+static void do_install_cmap(int con, struct fb_info *info);
+static void virgefb_set_disp(int con, struct fb_info *info);
+static int get_video_mode(const char *name);
+
+
+/* -------------------- Hardware specific routines ------------------------- */
+
+
+/*
+ *    Initialization
+ *
+ *    Set the default video mode for this chipset. If a video mode was
+ *    specified on the command line, it will override the default mode.
+ */
+
+static int Cyber_init(void)
+{
+	int i;
+
+	for (i = 0; i < 256; i++)
+	{
+		Cyber_colour_table [i][0] = i;
+		Cyber_colour_table [i][1] = i;
+		Cyber_colour_table [i][2] = i;
+		Cyber_colour_table [i][3] = 0;
+	}
+
+	/*
+	 * Just clear the thing for the biggest mode.
+	 *
+	 * ++Andre, TODO: determine size first, then clear all memory
+	 *                (the 3D penguin might need texture memory :-) )
+	 */
+
+	memset ((char*)CyberMem, 0, 1600 * 1200);
+
+	/* Disable hardware cursor */
+	CyberSize = 0x00400000; /* 4 MB */
+
+	vgawb_3d(0x3c8, 255);
+	vgawb_3d(0x3c9, 56);
+	vgawb_3d(0x3c9, 100);
+	vgawb_3d(0x3c9, 160);
+
+	vgawb_3d(0x3c8, 254);
+	vgawb_3d(0x3c9, 0);
+	vgawb_3d(0x3c9, 0);
+	vgawb_3d(0x3c9, 0);
+
+	/* Disable hardware cursor */
+	vgawb_3d(S3_CRTC_ADR, S3_REG_LOCK2);
+	vgawb_3d(S3_CRTC_DATA, 0xa0);
+	vgawb_3d(S3_CRTC_ADR, S3_HGC_MODE);
+	vgawb_3d(S3_CRTC_DATA, 0x00);
+	vgawb_3d(S3_CRTC_ADR, S3_HWGC_DX);
+	vgawb_3d(S3_CRTC_DATA, 0x00);
+	vgawb_3d(S3_CRTC_ADR, S3_HWGC_DY);
+	vgawb_3d(S3_CRTC_DATA, 0x00);
+
+	return 0; /* TODO: hardware cursor for CV64/3D */
+}
+
+
+/*
+ *    This function should fill in the `fix' structure based on the
+ *    values in the `par' structure.
+ */
+
+static int Cyber_encode_fix(struct fb_fix_screeninfo *fix,
+			    struct virgefb_par *par)
+{
+	int i;
+
+	strcpy(fix->id, virgefb_name);
+	fix->smem_start = (caddr_t)CyberMem;
+	fix->smem_len = CyberSize;
+	fix->mmio_start = (unsigned char *)CyberRegs;
+	fix->mmio_len = 0x10000; /* TODO: verify this for the CV64/3D */
+
+	fix->type = FB_TYPE_PACKED_PIXELS;
+	fix->type_aux = 0;
+	if (par->bpp == 8)
+		fix->visual = FB_VISUAL_PSEUDOCOLOR;
+	else
+		fix->visual = FB_VISUAL_DIRECTCOLOR;
+
+	fix->xpanstep = 0;
+	fix->ypanstep = 0;
+	fix->ywrapstep = 0;
+	fix->line_length = 0;
+
+	for (i = 0; i < arraysize(fix->reserved); i++)
+		fix->reserved[i] = 0;
+
+	return(0);
+}
+
+
+/*
+ *    Get the video params out of `var'. If a value doesn't fit, round
+ *    it up, if it's too big, return -EINVAL.
+ */
+
+static int Cyber_decode_var(struct fb_var_screeninfo *var,
+			    struct virgefb_par *par)
+{
+#if 1
+	par->xres = var->xres;
+	par->yres = var->yres;
+	par->bpp = var->bits_per_pixel;
+#else
+	if (Cyberfb_Cyber8) {
+		par->xres = VIRGE8_WIDTH;
+		par->yres = VIRGE8_HEIGHT;
+		par->bpp = 8;
+	} else {
+		par->xres = VIRGE16_WIDTH;
+		par->yres = VIRGE16_HEIGHT;
+		par->bpp = 16;
+	}
+#endif
+	return(0);
+}
+
+
+/*
+ *    Fill the `var' structure based on the values in `par' and maybe
+ *    other values read out of the hardware.
+ */
+
+static int Cyber_encode_var(struct fb_var_screeninfo *var,
+			    struct virgefb_par *par)
+{
+	int i;
+
+	var->xres = par->xres;
+	var->yres = par->yres;
+	var->xres_virtual = par->xres;
+	var->yres_virtual = par->yres;
+	var->xoffset = 0;
+	var->yoffset = 0;
+
+	var->bits_per_pixel = par->bpp;
+	var->grayscale = 0;
+
+	if (par->bpp == 8) {
+		var->red.offset = 0;
+		var->red.length = 8;
+		var->red.msb_right = 0;
+		var->blue = var->green = var->red;
+	} else {
+		var->red.offset = 11;
+		var->red.length = 5;
+		var->red.msb_right = 0;
+		var->green.offset = 5;
+		var->green.length = 6;
+		var->green.msb_right = 0;
+		var->blue.offset = 0;
+		var->blue.length = 5;
+		var->blue.msb_right = 0;
+	}
+	var->transp.offset = 0;
+	var->transp.length = 0;
+	var->transp.msb_right = 0;
+
+	var->nonstd = 0;
+	var->activate = 0;
+
+	var->height = -1;
+	var->width = -1;
+
+	var->accel = FB_ACCEL_S3VIRGE;
+	DPRINTK("accel CV64/3D\n");
+
+	var->vmode = FB_VMODE_NONINTERLACED;
+
+	/* Dummy values */
+
+	if (par->bpp == 8)
+		var->pixclock = VIRGE8_PIXCLOCK;
+	else
+		var->pixclock = VIRGE16_PIXCLOCK;
+	var->sync = 0;
+	var->left_margin = 64;
+	var->right_margin = 96;
+	var->upper_margin = 35;
+	var->lower_margin = 12;
+	var->hsync_len = 112;
+	var->vsync_len = 2;
+
+	for (i = 0; i < arraysize(var->reserved); i++)
+		var->reserved[i] = 0;
+
+	return(0);
+}
+
+
+/*
+ *    Set a single color register. The values supplied are already
+ *    rounded down to the hardware's capabilities (according to the
+ *    entries in the var structure). Return != 0 for invalid regno.
+ */
+
+static int Cyber_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+			   u_int transp, struct fb_info *info)
+{
+	if (regno > 255)
+	{
+		return (1);
+	}
+
+	/*
+	 * No colors on the CV3D yet.
+	 */
+
+	vgawb_3d(0x3c8, (unsigned char) regno);
+	Cyber_colour_table [regno][0] = red & 0xff;
+	Cyber_colour_table [regno][1] = green & 0xff;
+	Cyber_colour_table [regno][2] = blue & 0xff;
+	Cyber_colour_table [regno][3] = transp;
+
+	vgawb_3d(0x3c9, ((red & 0xff) >> 2));
+	vgawb_3d(0x3c9, ((green & 0xff) >> 2));
+	vgawb_3d(0x3c9, ((blue & 0xff) >> 2));
+
+	return (0);
+}
+
+
+/*
+ *    Read a single color register and split it into
+ *    colors/transparent. Return != 0 for invalid regno.
+ */
+
+static int Cyber_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue,
+			   u_int *transp, struct fb_info *info)
+{
+	if (regno >= 256)
+		return (1);
+	*red	= Cyber_colour_table [regno][0];
+	*green	= Cyber_colour_table [regno][1];
+	*blue	= Cyber_colour_table [regno][2];
+	*transp = Cyber_colour_table [regno][3];
+	return (0);
+}
+
+
+/*
+ *    (Un)Blank the screen
+ */
+
+void Cyber_blank(int blank)
+{
+	int i;
+
+	if (blank)
+	{
+		for (i = 0; i < 256; i++)
+		{
+			vgawb_3d(0x3c8, (unsigned char) i);
+			vgawb_3d(0x3c9, 0);
+			vgawb_3d(0x3c9, 0);
+			vgawb_3d(0x3c9, 0);
+		}
+	}
+	else
+	{
+		for (i = 0; i < 256; i++)
+		{
+			vgawb_3d(0x3c8, (unsigned char) i);
+			vgawb_3d(0x3c9, Cyber_colour_table[i][0] >> 2);
+			vgawb_3d(0x3c9, Cyber_colour_table[i][1] >> 2);
+			vgawb_3d(0x3c9, Cyber_colour_table[i][2] >> 2);
+		}
+	}
+}
+
+/*
+ * CV3D low-level support
+ */
+
+#define Cyber3D_WaitQueue(v)	 { do { while ((rl_3d(0x8504) & 0x1f00) < (((v)+2) << 8)); } while (0); }
+
+static inline void Cyber3D_WaitBusy(void)
+{
+unsigned long status;
+
+	do {
+		status = rl_3d(0x8504);
+	} while (!(status & (1 << 13)));
+}
+
+#define S3V_BITBLT	(0x0 << 27)
+#define S3V_RECTFILL	(0x2 << 27)
+#define S3V_AUTOEXE	0x01
+#define S3V_HWCLIP	0x02
+#define S3V_DRAW	0x20
+#define S3V_DST_8BPP	0x00
+#define S3V_DST_16BPP	0x04
+#define S3V_DST_24BPP	0x08
+#define S3V_MONO_PAT	0x100
+
+#define S3V_BLT_COPY	(0xcc<<17)
+#define S3V_BLT_CLEAR	(0x00<<17)
+#define S3V_BLT_SET	(0xff<<17)
+
+ /*
+  * BitBLT - Through the Plane
+  */
+
+static void Cyber3D_BitBLT(u_short curx, u_short cury, u_short destx,
+			   u_short desty, u_short width, u_short height)
+{
+	unsigned int blitcmd = S3V_BITBLT | S3V_DRAW | S3V_DST_8BPP;
+
+	blitcmd |= S3V_BLT_COPY;
+
+	/* Set drawing direction */
+	/* -Y, X maj, -X (default) */
+	if (curx > destx)
+	{
+		blitcmd |= (1 << 25);  /* Drawing direction +X */
+	}
+	else
+	{
+		curx  += (width - 1);
+		destx += (width - 1);
+	}
+
+	if (cury > desty)
+	{
+		blitcmd |= (1 << 26);  /* Drawing direction +Y */
+	}
+	else
+	{
+		cury  += (height - 1);
+		desty += (height - 1);
+	}
+
+	wl_3d(0xa4f4, 1); /* pattern fb color */
+
+	wl_3d(0xa4e8, ~0); /* mono pat 0 */
+	wl_3d(0xa4ec, ~0); /* mono pat 1 */
+
+	wl_3d(0xa504, ((width << 16) | height));	/* rwidth_height */
+	wl_3d(0xa508, ((curx << 16)  | cury));		/* rsrc_xy */
+	wl_3d(0xa50c, ((destx << 16) | desty));		/* rdest_xy */
+
+	wl_3d(0xa500, blitcmd);				/* GO! */
+
+	Cyber3D_WaitBusy();
+}
+
+/*
+ * Rectangle Fill Solid
+ */
+
+static void Cyber3D_RectFill(u_short x, u_short y, u_short width,
+			     u_short height, u_short color)
+{
+	unsigned int tmp;
+	unsigned int blitcmd = S3V_RECTFILL | S3V_DRAW | S3V_DST_8BPP |
+		S3V_BLT_CLEAR | S3V_MONO_PAT | (1 << 26) | (1 << 25);
+
+	tmp = color & 0xff;
+	wl_3d(0xa4f4, tmp);
+
+	wl_3d(0xa504, ((width << 16) | height));	/* rwidth_height */
+	wl_3d(0xa50c, ((x << 16) | y));			/* rdest_xy */
+
+	wl_3d(0xa500, blitcmd);				/* GO! */
+	Cyber3D_WaitBusy();
+}
+
+
+/**************************************************************
+ * Move cursor to x, y
+ */
+static void Cyber_MoveCursor (u_short x, u_short y)
+{
+	printk("Yuck .... MoveCursor on a 3D\n");
+	return;
+}
+
+
+/* -------------------- Interfaces to hardware functions -------------------- */
+
+
+static struct fb_hwswitch Cyber_switch = {
+	Cyber_init, Cyber_encode_fix, Cyber_decode_var, Cyber_encode_var,
+	Cyber_getcolreg, Cyber_setcolreg, Cyber_blank
+};
+
+
+/* -------------------- Generic routines ------------------------------------ */
+
+
+/*
+ *    Fill the hardware's `par' structure.
+ */
+
+static void virgefb_get_par(struct virgefb_par *par)
+{
+	if (current_par_valid)
+	{
+		*par = current_par;
+	}
+	else
+	{
+		fbhw->decode_var(&virgefb_default, par);
+	}
+}
+
+
+static void virgefb_set_par(struct virgefb_par *par)
+{
+	current_par = *par;
+	current_par_valid = 1;
+}
+
+
+static void virge_set_video(struct fb_var_screeninfo *var)
+{
+	/* Set clipping rectangle to current screen size */
+ 
+	unsigned int clip;
+
+	clip = ((0 << 16) | (var->xres - 1));
+	wl_3d(0xa4dc, clip);
+	clip = ((0 << 16) | (var->yres - 1));
+	wl_3d(0xa4e0, clip);
+}
+
+
+static int do_fb_set_var(struct fb_var_screeninfo *var, int isactive)
+{
+	int err, activate;
+	struct virgefb_par par;
+
+	if ((err = fbhw->decode_var(var, &par)))
+		return(err);
+	activate = var->activate;
+	if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW && isactive)
+		virgefb_set_par(&par);
+	fbhw->encode_var(var, &par);
+	var->activate = activate;
+
+	virge_set_video(var);
+	return 0;
+}
+
+
+static void do_install_cmap(int con, struct fb_info *info)
+{
+	if (con != currcon)
+		return;
+	if (fb_display[con].cmap.len)
+		fb_set_cmap(&fb_display[con].cmap, &fb_display[con].var, 1,
+			    fbhw->setcolreg, info);
+	else
+		fb_set_cmap(fb_default_cmap(1<<fb_display[con].var.bits_per_pixel),
+			    &fb_display[con].var, 1, fbhw->setcolreg, info);
+}
+
+
+/*
+ *  Open/Release the frame buffer device
+ */
+
+static int virgefb_open(struct fb_info *info)
+{
+	/*
+	 * Nothing, only a usage count for the moment
+	 */
+
+	MOD_INC_USE_COUNT;
+	return(0);
+}
+
+static int virgefb_release(struct fb_info *info)
+{
+	MOD_DEC_USE_COUNT;
+	return(0);
+}
+
+
+/*
+ *    Get the Fixed Part of the Display
+ */
+
+static int virgefb_get_fix(struct fb_fix_screeninfo *fix, int con,
+			   struct fb_info *info)
+{
+	struct virgefb_par par;
+	int error = 0;
+
+	if (con == -1)
+		virgefb_get_par(&par);
+	else
+		error = fbhw->decode_var(&fb_display[con].var, &par);
+	return(error ? error : fbhw->encode_fix(fix, &par));
+}
+
+
+/*
+ *    Get the User Defined Part of the Display
+ */
+
+static int virgefb_get_var(struct fb_var_screeninfo *var, int con,
+			   struct fb_info *info)
+{
+	struct virgefb_par par;
+	int error = 0;
+
+	if (con == -1)
+	{
+		virgefb_get_par(&par);
+		error = fbhw->encode_var(var, &par);
+		disp.var = *var;   /* ++Andre: don't know if this is the right place */
+	}
+	else
+	{
+		*var = fb_display[con].var;
+	}
+
+	return(error);
+}
+
+
+static void virgefb_set_disp(int con, struct fb_info *info)
+{
+	struct fb_fix_screeninfo fix;
+	struct display *display;
+
+	if (con >= 0)
+		display = &fb_display[con];
+	else
+		display = &disp;	/* used during initialization */
+
+	virgefb_get_fix(&fix, con, info);
+	if (con == -1)
+		con = 0;
+	display->screen_base = (u_char *)fix.smem_start;
+	display->visual = fix.visual;
+	display->type = fix.type;
+	display->type_aux = fix.type_aux;
+	display->ypanstep = fix.ypanstep;
+	display->ywrapstep = fix.ywrapstep;
+	display->can_soft_blank = 1;
+	display->inverse = Cyberfb_inverse;
+	switch (display->var.bits_per_pixel) {
+#ifdef CONFIG_FBCON_CFB8
+	    case 8:
+		display->dispsw = &fbcon_virge8;
+		break;
+#endif
+#ifdef CONFIG_FBCON_CFB16
+	    case 16:
+		display->dispsw = &fbcon_cfb16;
+		break;
+#endif
+	    default:
+		display->dispsw = NULL;
+		break;
+	}
+}
+
+
+/*
+ *    Set the User Defined Part of the Display
+ */
+
+static int virgefb_set_var(struct fb_var_screeninfo *var, int con,
+			   struct fb_info *info)
+{
+	int err, oldxres, oldyres, oldvxres, oldvyres, oldbpp;
+
+	if ((err = do_fb_set_var(var, con == currcon)))
+		return(err);
+	if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
+		oldxres = fb_display[con].var.xres;
+		oldyres = fb_display[con].var.yres;
+		oldvxres = fb_display[con].var.xres_virtual;
+		oldvyres = fb_display[con].var.yres_virtual;
+		oldbpp = fb_display[con].var.bits_per_pixel;
+		fb_display[con].var = *var;
+		if (oldxres != var->xres || oldyres != var->yres ||
+		    oldvxres != var->xres_virtual ||
+		    oldvyres != var->yres_virtual ||
+		    oldbpp != var->bits_per_pixel) {
+			virgefb_set_disp(con, info);
+			(*fb_info.changevar)(con);
+			fb_alloc_cmap(&fb_display[con].cmap, 0, 0);
+			do_install_cmap(con, info);
+		}
+	}
+	var->activate = 0;
+	return(0);
+}
+
+
+/*
+ *    Get the Colormap
+ */
+
+static int virgefb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
+			    struct fb_info *info)
+{
+	if (con == currcon) /* current console? */
+		return(fb_get_cmap(cmap, &fb_display[con].var,
+				   kspc, fbhw->getcolreg, info));
+	else if (fb_display[con].cmap.len) /* non default colormap? */
+		fb_copy_cmap(&fb_display[con].cmap, cmap, kspc ? 0 : 2);
+	else
+		fb_copy_cmap(fb_default_cmap(1<<fb_display[con].var.bits_per_pixel),
+			     cmap, kspc ? 0 : 2);
+	return(0);
+}
+
+
+/*
+ *    Set the Colormap
+ */
+
+static int virgefb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
+			    struct fb_info *info)
+{
+	int err;
+
+	if (!fb_display[con].cmap.len) {       /* no colormap allocated? */
+		if ((err = fb_alloc_cmap(&fb_display[con].cmap,
+				 1<<fb_display[con].var.bits_per_pixel, 0)))
+			return(err);
+	}
+	if (con == currcon)		 /* current console? */
+		return(fb_set_cmap(cmap, &fb_display[con].var,
+				   kspc, fbhw->setcolreg, info));
+	else
+		fb_copy_cmap(cmap, &fb_display[con].cmap, kspc ? 0 : 1);
+	return(0);
+}
+
+
+/*
+ *    Pan or Wrap the Display
+ *
+ *    This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
+ */
+
+static int virgefb_pan_display(struct fb_var_screeninfo *var, int con,
+			       struct fb_info *info)
+{
+	return(-EINVAL);
+}
+
+
+/*
+    *	 Cybervision Frame Buffer Specific ioctls
+    */
+
+static int virgefb_ioctl(struct inode *inode, struct file *file,
+			 u_int cmd, u_long arg, int con, struct fb_info *info)
+{
+	return(-EINVAL);
+}
+
+
+static struct fb_ops virgefb_ops = {
+	virgefb_open, virgefb_release, virgefb_get_fix, virgefb_get_var,
+	virgefb_set_var, virgefb_get_cmap, virgefb_set_cmap,
+	virgefb_pan_display, NULL, virgefb_ioctl
+};
+
+
+__initfunc(void virgefb_setup(char *options, int *ints))
+{
+	char *this_opt;
+
+	fb_info.fontname[0] = '\0';
+
+	if (!options || !*options)
+		return;
+
+	for (this_opt = strtok(options, ","); this_opt; this_opt = strtok(NULL, ","))
+		if (!strcmp(this_opt, "inverse")) {
+			Cyberfb_inverse = 1;
+			fb_invert_cmaps();
+		} else if (!strncmp(this_opt, "font:", 5))
+			strcpy(fb_info.fontname, this_opt+5);
+		else if (!strcmp (this_opt, "virge8")){
+			virgefb_default = virgefb_predefined[VIRGE8_DEFMODE].var;
+		}
+		else if (!strcmp (this_opt, "virge16")){
+			virgefb_default = virgefb_predefined[VIRGE16_DEFMODE].var;
+		}
+		else
+			get_video_mode(this_opt);
+
+	DPRINTK("default mode: xres=%d, yres=%d, bpp=%d\n",virgefb_default.xres,
+                                                           virgefb_default.yres,
+		                                           virgefb_default.bits_per_pixel);
+}
+
+
+/*
+ *    Initialization
+ */
+
+__initfunc(unsigned long virgefb_init(unsigned long mem_start))
+{
+	int err;
+	struct virgefb_par par;
+	unsigned long board_addr;
+	const struct ConfigDev *cd;
+
+	if (!(CyberKey = zorro_find(ZORRO_PROD_PHASE5_CYBERVISION64_3D, 0, 0)))
+		return mem_start;
+
+	cd = zorro_get_board (CyberKey);
+	zorro_config_board (CyberKey, 0);
+	board_addr = (unsigned long)cd->cd_BoardAddr;
+
+	/* This includes the video memory as well as the S3 register set */
+	if ((unsigned long)cd->cd_BoardAddr < 0x01000000)
+	{
+		/*
+		 * Ok we got the board running in Z2 space.
+		 */
+
+		CyberMem = ZTWO_VADDR(board_addr);
+		printk("CV3D detected running in Z2 mode ... not yet supported!\n");
+		return -ENODEV;
+	}
+	else
+	{
+		CyberVGARegs = kernel_map(board_addr +0x0c000000,
+					       0x00010000,
+					       KERNELMAP_NOCACHE_SER,
+					       &mem_start);
+		CyberRegs = (char *)kernel_map(board_addr +0x05000000,
+					       0x00010000,
+					       KERNELMAP_NOCACHE_SER,
+					       &mem_start);
+		CyberMem = kernel_map(board_addr + 0x04800000,
+				      0x00400000,
+				      KERNELMAP_NOCACHE_SER,
+				      &mem_start);
+		printk("CV3D detected running in Z3 mode\n");
+	}
+
+	fbhw = &Cyber_switch;
+
+	strcpy(fb_info.modename, virgefb_name);
+	fb_info.changevar = NULL;
+	fb_info.node = -1;
+	fb_info.fbops = &virgefb_ops;
+	fb_info.disp = &disp;
+	fb_info.switch_con = &Cyberfb_switch;
+	fb_info.updatevar = &Cyberfb_updatevar;
+	fb_info.blank = &Cyberfb_blank;
+
+	err = register_framebuffer(&fb_info);
+	if (err < 0)
+		return mem_start;
+
+	fbhw->init();
+	fbhw->decode_var(&virgefb_default, &par);
+	fbhw->encode_var(&virgefb_default, &par);
+
+	do_fb_set_var(&virgefb_default, 1);
+	virgefb_get_var(&fb_display[0].var, -1, &fb_info);
+	virgefb_set_disp(-1, &fb_info);
+	do_install_cmap(0, &fb_info);
+
+	printk("fb%d: %s frame buffer device, using %ldK of video memory\n",
+	       GET_FB_IDX(fb_info.node), fb_info.modename, CyberSize>>10);
+
+	/* TODO: This driver cannot be unloaded yet */
+	MOD_INC_USE_COUNT;
+
+	return mem_start;
+}
+
+
+static int Cyberfb_switch(int con, struct fb_info *info)
+{
+	/* Do we have to save the colormap? */
+	if (fb_display[currcon].cmap.len)
+		fb_get_cmap(&fb_display[currcon].cmap, &fb_display[currcon].var, 1,
+			    fbhw->getcolreg, info);
+
+	do_fb_set_var(&fb_display[con].var, 1);
+	currcon = con;
+	/* Install new colormap */
+	do_install_cmap(con, info);
+	return(0);
+}
+
+
+/*
+ *    Update the `var' structure (called by fbcon.c)
+ *
+ *    This call looks only at yoffset and the FB_VMODE_YWRAP flag in `var'.
+ *    Since it's called by a kernel driver, no range checking is done.
+ */
+
+static int Cyberfb_updatevar(int con, struct fb_info *info)
+{
+	return(0);
+}
+
+
+/*
+    *    Blank the display.
+    */
+
+static void Cyberfb_blank(int blank, struct fb_info *info)
+{
+	fbhw->blank(blank);
+}
+
+
+/*
+ *    Get a Video Mode
+ */
+
+__initfunc(static int get_video_mode(const char *name))
+{
+	int i;
+
+	for (i = 0; i < NUM_TOTAL_MODES; i++) {
+		if (!strcmp(name, virgefb_predefined[i].name)) {
+			virgefb_default = virgefb_predefined[i].var;
+			return(i);
+		}
+	}
+	/* ++Andre: set virgefb default mode */
+	virgefb_default = virgefb_predefined[VIRGE8_DEFMODE].var;
+	return(0);
+}
+
+
+/*
+ *    Text console acceleration
+ */
+
+#ifdef CONFIG_FBCON_CFB8
+static void fbcon_virge8_bmove(struct display *p, int sy, int sx, int dy,
+			       int dx, int height, int width)
+{
+        sx *= 8; dx *= 8; width *= 8;
+        Cyber3D_BitBLT((u_short)sx, (u_short)(sy*p->fontheight), (u_short)dx,
+                       (u_short)(dy*p->fontheight), (u_short)width,
+                       (u_short)(height*p->fontheight));
+}
+
+static void fbcon_virge8_clear(struct vc_data *conp, struct display *p, int sy,
+			       int sx, int height, int width)
+{
+        unsigned char bg;
+
+        sx *= 8; width *= 8;
+        bg = attr_bgcol_ec(p,conp);
+        Cyber3D_RectFill((u_short)sx, (u_short)(sy*p->fontheight),
+                         (u_short)width, (u_short)(height*p->fontheight),
+                         (u_short)bg);
+}
+
+static struct display_switch fbcon_virge8 = {
+   fbcon_cfb8_setup, fbcon_virge8_bmove, fbcon_virge8_clear, fbcon_cfb8_putc,
+   fbcon_cfb8_putcs, fbcon_cfb8_revc
+};
+#endif
+
+
+#ifdef MODULE
+int init_module(void)
+{
+	return(virgefb_init(NULL));
+}
+
+void cleanup_module(void)
+{
+	/* Not reached because the usecount will never be
+	   decremented to zero */
+	unregister_framebuffer(&fb_info);
+	/* TODO: clean up ... */
+}
+#endif /* MODULE */
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