[PATCH] MAINTAINERS: sbp2 driver is not orphaned.

[firewire-audio.git] / drivers / video / cyblafb.c

/*
 * Frame buffer driver for Trident Cyberblade/i1 graphics core
 *
 * Copyright 2005 Knut Petersen <Knut_Petersen@t-online.de>
 *
 * CREDITS:
 *      tridentfb.c by Jani Monoses
 *      see files above for further credits
 *
 * TODO:
 *
 */

#define CYBLAFB_DEBUG 0

#include <linux/config.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <asm/types.h>
#include <video/cyblafb.h>

#define VERSION "0.54"

struct cyblafb_par {
        u32 pseudo_pal[16];
        struct fb_ops ops;
};

static struct fb_fix_screeninfo cyblafb_fix __devinitdata = {
        .id = "CyBla",
        .type = FB_TYPE_PACKED_PIXELS,
        .ypanstep = 1,
        .visual = FB_VISUAL_PSEUDOCOLOR,
        .accel = FB_ACCEL_NONE,
};

static char *mode __devinitdata = NULL;
static int bpp __devinitdata = 8;
static int ref __devinitdata = 75;
static int fp __devinitdata;
static int crt __devinitdata;
static int memsize __devinitdata;
static int vesafb __devinitdata;

static int nativex;
static int center;
static int stretch;
static int pciwb = 1;
static int pcirb = 1;
static int pciwr = 1;
static int pcirr = 1;
static int verbosity;
static int displaytype;

static void __iomem * io_virt; // iospace virtual memory address

module_param(mode,charp,0);
module_param(bpp,int,0);
module_param(ref,int,0);
module_param(fp,int,0);
module_param(crt,int,0);
module_param(nativex,int,0);
module_param(center,int,0);
module_param(stretch,int,0);
module_param(pciwb,int,0);
module_param(pcirb,int,0);
module_param(pciwr,int,0);
module_param(pcirr,int,0);
module_param(memsize,int,0);
module_param(verbosity,int,0);
module_param(vesafb,int,0);

//=========================================
//
// Port access macros for memory mapped io
//
//=========================================

#define out8(r,v) writeb(v,io_virt+r)
#define out32(r,v) writel(v,io_virt+r)
#define in8(r) readb(io_virt+r)
#define in32(r) readl(io_virt+r)

//======================================
//
// Hardware access inline functions
//
//======================================

static inline unsigned char read3X4(int reg)
{
        out8(0x3D4,reg);
        return in8(0x3D5);
}

static inline unsigned char read3C4(int reg)
{
        out8(0x3C4,reg);
        return in8(0x3C5);
}

static inline unsigned char read3CE(int reg)
{
        out8(0x3CE,reg);
        return in8(0x3CF);
}

static inline void write3X4(int reg,unsigned char val)
{
        out8(0x3D4,reg);
        out8(0x3D5,val);
}

static inline void write3C4(int reg,unsigned char val)
{
        out8(0x3C4,reg);
        out8(0x3C5,val);
}

static inline void write3CE(int reg,unsigned char val)
{
        out8(0x3CE,reg);
        out8(0x3CF,val);
}

static inline void write3C0(int reg,unsigned char val)
{
        in8(0x3DA);     // read to reset index
        out8(0x3C0,reg);
        out8(0x3C0,val);
}

//=================================================
//
// Enable memory mapped io and unprotect registers
//
//=================================================

static inline void enable_mmio(void)
{
        int tmp;

        outb(0x0B,0x3C4);
        inb(0x3C5);             // Set NEW mode
        outb(SR0E,0x3C4);       // write enable a lot of extended ports
        outb(0x80,0x3C5);

        outb(SR11,0x3C4);       // write enable those extended ports that
        outb(0x87,0x3C5);       // are not affected by SR0E_New

        outb(CR1E,0x3d4);       // clear write protect bit for port 0x3c2
        tmp=inb(0x3d5) & 0xBF;
        outb(CR1E,0x3d4);
        outb(tmp,0x3d5);

        outb(CR39,0x3D4);
        outb(inb(0x3D5)|0x01,0x3D5); // Enable mmio, everything else untouched
}

//=================================================
//
// Set pixel clock VCLK1
//   - multipliers set elswhere
//   - freq in units of 0.01 MHz
//
//=================================================

static void set_vclk(struct cyblafb_par *par, int freq)
{
        u32 m,n,k;
        int f,fi,d,di;
        u8 lo=0,hi=0;

        d = 2000;
        k = freq >= 10000 ? 0 : freq >= 5000 ? 1 : freq >= 2500 ? 2 : 3;
        for(m = 0;m<64;m++)
        for(n = 0;n<250;n++) { // max 249 is a hardware limit for cybla/i1 !
                fi = (int)(((5864727*(n+8))/((m+2)*(1<<k)))>>12);
                if ((di = abs(fi - freq)) < d) {
                        d = di;
                        f = fi;
                        lo = (u8) n;
                        hi = (u8) ((k<<6) | m);
                }
        }
        write3C4(SR19,hi);
        write3C4(SR18,lo);
        if(verbosity > 1)
                output("pixclock = %d.%02d MHz, k/m/n %x %x %x\n",
                freq/100,freq%100,(hi&0xc0)>>6,hi&0x3f,lo);
}

//================================================
//
// Cyberblade specific Graphics Engine (GE) setup
//
//================================================

static void cyblafb_setup_GE(int pitch,int bpp)
{
        int base = (pitch>>3)<<20;

        switch (bpp) {
                case  8: base |= (0<<29); break;
                case 15: base |= (5<<29); break;
                case 16: base |= (1<<29); break;
                case 24:
                case 32: base |= (2<<29); break;
        }

        write3X4(CR36,0x90);    // reset GE
        write3X4(CR36,0x80);    // enable GE

        out32(GE24,1<<7);       // reset all GE pointers
        out32(GE24,0);

        write3X4(CR2D,0x00);    // GE Timinigs, no delays

        out32(GEB8,base); // Destination Stride / Buffer Base 0, p 133
        out32(GEBC,base); // Destination Stride / Buffer Base 1, p 133
        out32(GEC0,base); // Destination Stride / Buffer Base 2, p 133
        out32(GEC4,base); // Destination Stride / Buffer Base 3, p 133
        out32(GEC8,base); // Source Stride / Buffer Base 0, p 133
        out32(GECC,base); // Source Stride / Buffer Base 1, p 133
        out32(GED0,base); // Source Stride / Buffer Base 2, p 133
        out32(GED4,base); // Source Stride / Buffer Base 3, p 133
        out32(GE6C,0);    // Pattern and Style, p 129, ok
}

//=====================================================================
//
// Although this is a .fb_sync function that could be enabled in
// cyblafb_ops, we do not include it there. We sync immediately before
// new GE operations to improve performance.
//
//=====================================================================

static int cyblafb_sync(struct fb_info *info)
{
        int status, i=100000;
        while( ((status=in32(GE20)) & 0xFA800000) && i != 0)
                i--;

        if (i == 0) {
                // The timeout might be caused by disabled mmio.
                // Cause:
                //   - bit CR39 & 1 == 0 upon return, X trident driver bug
                //   - kdm bug (KD_GRAPHICS not set on first switch)
                //   - kernel design flaw (it believes in the correctness
                //     of kdm/X
                // So we make sure that mmio is enabled first ...
                enable_mmio();
//              show_trace(NULL,&status);
                i=1000000;
                while( ((status=in32(GE20)) & 0xFA800000) && i != 0)
                        i--;
                if (i == 0) {
                        output("GE Timeout, status: %x\n",status);
                        if(status & 0x80000000)
                                output("Bresenham Engine : Busy\n");
                        if(status & 0x40000000)
                                output("Setup Engine     : Busy\n");
                        if(status & 0x20000000)
                                output("SP / DPE         : Busy\n");
                        if(status & 0x10000000)
                                output("Memory Interface : Busy\n");
                        if(status & 0x08000000)
                                output("Com Lst Proc     : Busy\n");
                        if(status & 0x04000000)
                                output("Block Write      : Busy\n");
                        if(status & 0x02000000)
                                output("Command Buffer   : Full\n");
                        if(status & 0x01000000)
                                output("RESERVED         : Busy\n");
                        if(status & 0x00800000)
                                output("PCI Write Buffer : Busy\n");
                        cyblafb_setup_GE(info->var.xres,
                                         info->var.bits_per_pixel);
                }
        }

        return 0;
}

//==============================
//
// Cyberblade specific fillrect
//
//==============================

static void cyblafb_fillrect(struct fb_info * info,
                             const struct fb_fillrect *fr)
{
        int bpp = info->var.bits_per_pixel;
        int col;

        switch (bpp) {
                default:
                case 8: col = fr->color;
                        col |= col <<8;
                        col |= col <<16;
                        break;
                case 16: col = ((u32 *)(info->pseudo_palette))[fr->color];
                         col |= col <<16;
                         break;
                case 32: col = ((u32 *)(info->pseudo_palette))[fr->color];
                         break;
        }

        cyblafb_sync(info);

        out32(GE60,col);
        out32(GE48,fr->rop ? 0x66:ROP_S);
        out32(GE44,0x20000000|1<<19|1<<4|2<<2);
        out32(GE08,point(fr->dx,fr->dy));
        out32(GE0C,point(fr->dx+fr->width-1,fr->dy+fr->height-1));

}

//==============================
//
// Cyberblade specific copyarea
//
//==============================

static void cyblafb_copyarea(struct fb_info *info,
                             const struct fb_copyarea *ca)
{
        __u32 s1,s2,d1,d2;
        int direction;

        s1 = point(ca->sx,ca->sy);
        s2 = point(ca->sx+ca->width-1,ca->sy+ca->height-1);
        d1 = point(ca->dx,ca->dy);
        d2 = point(ca->dx+ca->width-1,ca->dy+ca->height-1);
        if ((ca->sy > ca->dy) || ((ca->sy == ca->dy) && (ca->sx > ca->dx)))
                direction = 0;
        else
                direction = 2;

        cyblafb_sync(info);

        out32(GE44,0xa0000000|1<<19|1<<2|direction);
        out32(GE00,direction?s2:s1);
        out32(GE04,direction?s1:s2);
        out32(GE08,direction?d2:d1);
        out32(GE0C,direction?d1:d2);

}

//=======================================================================
//
// Cyberblade specific imageblit
//
// Accelerated for the most usual case, blitting 1-bit deep character
// character images. Everything else is passed to the generic imageblit.
//
//=======================================================================

static void cyblafb_imageblit(struct fb_info *info,
                              const struct fb_image *image)
{

        u32 fgcol, bgcol;

        int i;
        int bpp = info->var.bits_per_pixel;
        int index = 0;
        int index_end=image->height * image->width / 8;
        int width_dds=image->width / 32;
        int width_dbs=image->width % 32;

        if (image->depth != 1 || bpp < 8 || bpp > 32 || bpp % 8 != 0 ||
            image->width % 8 != 0 || image->width == 0 || image->height == 0) {
                cfb_imageblit(info,image);
                return;
        }

        if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
            info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
                fgcol = ((u32*)(info->pseudo_palette))[image->fg_color];
                bgcol = ((u32*)(info->pseudo_palette))[image->bg_color];
        } else {
                fgcol = image->fg_color;
                bgcol = image->bg_color;
        }

        switch (bpp) {
                case 8:
                        fgcol |= fgcol <<8; fgcol |= fgcol <<16;
                        bgcol |= bgcol <<8; bgcol |= bgcol <<16;
                        break;
                case 16:
                        fgcol |= fgcol <<16;
                        bgcol |= bgcol <<16;
                        break;
                default:
                         break;
        }

        cyblafb_sync(info);

        out32(GE60,fgcol);
        out32(GE64,bgcol);
        out32(GE44,0xa0000000 | 1<<20 | 1<<19);
        out32(GE08,point(image->dx,image->dy));
        out32(GE0C,point(image->dx+image->width-1,image->dy+image->height-1));

        while(index < index_end) {
                const char *p = image->data + index;
                for(i=0;i<width_dds;i++) {
                        out32(GE9C,*(u32*)p);
                        p+=4;
                        index+=4;
                }
                switch(width_dbs) {
                case 0: break;
                case 8: out32(GE9C,*(u8*)p);
                        index+=1;
                        break;
                case 16: out32(GE9C,*(u16*)p);
                        index+=2;
                        break;
                case 24: out32(GE9C,*(u16*)p | *(u8*)(p+2)<<16);
                        index+=3;
                        break;
                }
        }
}

//==========================================================
//
// Check if video mode is acceptable. We change var->??? if
// video mode is slightly off or return error otherwise.
// info->??? must not be changed!
//
//==========================================================

static int cyblafb_check_var(struct fb_var_screeninfo *var,
                             struct fb_info *info)
{
        int bpp = var->bits_per_pixel;
        int s,t,maxvyres;

        //
        // we try to support 8, 16, 24 and 32 bpp modes,
        // default to 8
        //
        // there is a 24 bpp mode, but for now we change requests to 32 bpp
        // (This is what tridentfb does ... will be changed in the future)
        //
        //
        if ( bpp % 8 != 0 || bpp < 8 || bpp >32)
                bpp = 8;
        if (bpp == 24 )
                bpp = var->bits_per_pixel = 32;

        //
        // interlaced modes are broken, fail if one is requested
        //
        if (var->vmode & FB_VMODE_INTERLACED)
                return -EINVAL;

        //
        // fail if requested resolution is higher than physical
        // flatpanel resolution
        //
        if ((displaytype == DISPLAY_FP) && nativex && var->xres > nativex)
                return -EINVAL;

        //
        // xres != xres_virtual is broken, fail if such an
        // unusual mode is requested
        //
        if (var->xres != var->xres_virtual)
                return -EINVAL;

        //
        // we do not allow vclk to exceed 230 MHz
        //
        if ((bpp==32 ? 200000000 : 100000000) / var->pixclock > 23000)
                return -EINVAL;

        //
        // calc max yres_virtual that would fit in memory
        // and max yres_virtual that could be used for scrolling
        // and use minimum of the results as maxvyres
        //
        // adjust vyres_virtual to maxvyres if necessary
        // fail if requested yres is bigger than maxvyres
        //
        s = (0x1fffff / (var->xres * bpp/8)) + var->yres;
        t = info->fix.smem_len / (var->xres * bpp/8);
        maxvyres = t < s ? t : s;
        if (maxvyres < var->yres_virtual)
                var->yres_virtual=maxvyres;
        if (maxvyres < var->yres)
                return -EINVAL;

        switch (bpp) {
                case 8:
                        var->red.offset = 0;
                        var->green.offset = 0;
                        var->blue.offset = 0;
                        var->red.length = 6;
                        var->green.length = 6;
                        var->blue.length = 6;
                        break;
                case 16:
                        var->red.offset = 11;
                        var->green.offset = 5;
                        var->blue.offset = 0;
                        var->red.length = 5;
                        var->green.length = 6;
                        var->blue.length = 5;
                        break;
                case 32:
                        var->red.offset = 16;
                        var->green.offset = 8;
                        var->blue.offset = 0;
                        var->red.length = 8;
                        var->green.length = 8;
                        var->blue.length = 8;
                        break;
                default:
                        return -EINVAL;
        }

        return 0;

}

//=====================================================================
//
// Pan the display
//
// The datasheets defines crt start address to be 20 bits wide and
// to be programmed to CR0C, CR0D, CR1E and CR27. Actually there is
// CR2B[5] as an undocumented extension bit. Epia BIOS 2.07 does use
// it, so it is also safe to be used here. BTW: datasheet CR0E on page
// 90 really is CR1E, the real CRE is documented on page 72.
//
//=====================================================================

static int cyblafb_pan_display(struct fb_var_screeninfo *var,
                               struct fb_info *info)
{
        unsigned int offset;

        offset=(var->xoffset+(var->yoffset*var->xres))*var->bits_per_pixel/32;
        info->var.xoffset = var->xoffset;
        info->var.yoffset = var->yoffset;

        write3X4(CR0D,offset & 0xFF);
        write3X4(CR0C,(offset & 0xFF00) >> 8);
        write3X4(CR1E,(read3X4(CR1E) & 0xDF) | ((offset & 0x10000) >> 11));
        write3X4(CR27,(read3X4(CR27) & 0xF8) | ((offset & 0xE0000) >> 17));
        write3X4(CR2B,(read3X4(CR2B) & 0xDF) | ((offset & 0x100000) >> 15));

        return 0;
}

//============================================
//
// This will really help in case of a bug ...
// dump most gaphics core registers.
//
//============================================

static void regdump(struct cyblafb_par *par)
{
        int i;

        if (verbosity < 2)
                return;

        printk("\n");
        for(i=0; i<=0xff; i++) {
                outb(i,0x3d4);
                printk("CR%02x=%02x ",i,inb(0x3d5));
                if (i%16==15)
                        printk("\n");
        }

        outb(0x30,0x3ce);
        outb(inb(0x3cf) | 0x40,0x3cf);
        for(i=0; i<=0x1f; i++) {
                if (i==0 || (i>2 && i<8) || i==0x10 || i==0x11 || i==0x16) {
                        outb(i,0x3d4);
                        printk("CR%02x=%02x ",i,inb(0x3d5));
                } else
                        printk("------- ");
                if (i%16==15)
                        printk("\n");
        }
        outb(0x30,0x3ce);
        outb(inb(0x3cf) & 0xbf,0x3cf);

        printk("\n");
        for(i=0; i<=0x7f; i++) {
                outb(i,0x3ce);
                printk("GR%02x=%02x ",i,inb(0x3cf));
                if (i%16==15)
                        printk("\n");
        }

        printk("\n");
        for(i=0; i<=0xff; i++) {
                outb(i,0x3c4);
                printk("SR%02x=%02x ",i,inb(0x3c5));
                if (i%16==15)
                        printk("\n");
        }

        printk("\n");
        for(i=0; i <= 0x1F; i++) {
                inb(0x3da); // next access is index!
                outb(i,0x3c0);
                printk("AR%02x=%02x ",i,inb(0x3c1));
                if (i%16==15)
                        printk("\n");
        }
        printk("\n");

        inb(0x3DA);                     // reset internal flag to 3c0 index
        outb(0x20,0x3C0);               // enable attr

        return;
}

//======================================
//
// Set hardware to requested video mode
//
//======================================

static int cyblafb_set_par(struct fb_info *info)
{
        struct cyblafb_par *par = info->par;
        u32
        htotal,hdispend,hsyncstart,hsyncend,hblankstart,hblankend,preendfetch,
                vtotal,vdispend,vsyncstart,vsyncend,vblankstart,vblankend;
        struct fb_var_screeninfo *var = &info->var;
        int bpp = var->bits_per_pixel;
        int i;

        if (verbosity > 0)
                output("Switching to new mode: "
                       "fbset -g %d %d %d %d %d -t %d %d %d %d %d %d %d\n",
                        var->xres,var->yres,var->xres_virtual,
                        var->yres_virtual,var->bits_per_pixel,var->pixclock,
                        var->left_margin,var->right_margin,var->upper_margin,
                        var->lower_margin,var->hsync_len,var->vsync_len);

        htotal = (var->xres + var->left_margin + var->right_margin +
                                                 var->hsync_len) / 8 - 5;
        hdispend = var->xres/8 - 1;
        hsyncstart = (var->xres + var->right_margin)/8;
        hsyncend = var->hsync_len/8;
        hblankstart = hdispend + 1;
        hblankend = htotal + 3; // should be htotal + 5, bios does it this way
        preendfetch = ((var->xres >> 3) + 1) * ((bpp+1) >> 3);

        vtotal = var->yres + var->upper_margin + var->lower_margin +
                                                 var->vsync_len - 2;
        vdispend = var->yres - 1;
        vsyncstart = var->yres + var->lower_margin;
        vblankstart = var->yres;
        vblankend = vtotal; // should be vtotal + 2, but bios does it this way
        vsyncend = var->vsync_len;

        enable_mmio();          // necessary! ... check X ...

        write3X4(CR11,read3X4(CR11) & 0x7F); // unlock cr00 .. cr07

        write3CE(GR30,8);

        if ((displaytype == DISPLAY_FP) && var->xres < nativex) {

                // stretch or center ?

                out8(0x3C2,0xEB);

                write3CE(GR30,read3CE(GR30) | 0x81); // shadow mode on

                if (center) {
                        write3CE(GR52,(read3CE(GR52) & 0x7C) | 0x80);
                        write3CE(GR53,(read3CE(GR53) & 0x7C) | 0x80);
                }
                else if (stretch) {
                        write3CE(GR5D,0);
                        write3CE(GR52,(read3CE(GR52) & 0x7C) | 1);
                        write3CE(GR53,(read3CE(GR53) & 0x7C) | 1);
                }

        } else {
                out8(0x3C2,0x2B);
                write3CE(GR30,8);
        }

        //
        // Setup CRxx regs
        //

        write3X4(CR00,htotal & 0xFF);
        write3X4(CR01,hdispend & 0xFF);
        write3X4(CR02,hblankstart & 0xFF);
        write3X4(CR03,hblankend & 0x1F);
        write3X4(CR04,hsyncstart & 0xFF);
        write3X4(CR05,(hsyncend & 0x1F) | ((hblankend & 0x20)<<2));
        write3X4(CR06,vtotal & 0xFF);
        write3X4(CR07,(vtotal & 0x100) >> 8 |
                      (vdispend & 0x100) >> 7 |
                      (vsyncstart & 0x100) >> 6 |
                      (vblankstart & 0x100) >> 5 |
                      0x10 |
                      (vtotal & 0x200) >> 4 |
                      (vdispend & 0x200) >> 3 |
                      (vsyncstart & 0x200) >> 2);
        write3X4(CR08,0);
        write3X4(CR09,(vblankstart & 0x200) >> 4 | 0x40 |  // FIX !!!
                      ((info->var.vmode & FB_VMODE_DOUBLE) ? 0x80 : 0));
        write3X4(CR0A,0);  // Init to some reasonable default
        write3X4(CR0B,0);  // Init to some reasonable default
        write3X4(CR0C,0);  // Offset 0
        write3X4(CR0D,0);  // Offset 0
        write3X4(CR0E,0);  // Init to some reasonable default
        write3X4(CR0F,0);  // Init to some reasonable default
        write3X4(CR10,vsyncstart & 0xFF);
        write3X4(CR11,(vsyncend & 0x0F));
        write3X4(CR12,vdispend & 0xFF);
        write3X4(CR13,((info->var.xres * bpp)/(4*16)) & 0xFF);
        write3X4(CR14,0x40);  // double word mode
        write3X4(CR15,vblankstart & 0xFF);
        write3X4(CR16,vblankend & 0xFF);
        write3X4(CR17,0xC3);
        write3X4(CR18,0xFF);
        //       CR19: needed for interlaced modes ... ignore it for now
        write3X4(CR1A,0x07); // Arbitration Control Counter 1
        write3X4(CR1B,0x07); // Arbitration Control Counter 2
        write3X4(CR1C,0x07); // Arbitration Control Counter 3
        write3X4(CR1D,0x00); // Don't know, doesn't hurt ;-)
        write3X4(CR1E,(info->var.vmode & FB_VMODE_INTERLACED) ? 0x84 : 0x80);
        //       CR1F: do not set, contains BIOS info about memsize
        write3X4(CR20,0x20); // enabe wr buf, disable 16bit planar mode
        write3X4(CR21,0x20); // enable linear memory access
        //       CR22: RO cpu latch readback
        //       CR23: ???
        //       CR24: RO AR flag state
        //       CR25: RAMDAC rw timing, pclk buffer tristate control ????
        //       CR26: ???
        write3X4(CR27,(vdispend & 0x400) >> 6 |
                      (vsyncstart & 0x400) >> 5 |
                      (vblankstart & 0x400) >> 4 |
                      (vtotal & 0x400) >> 3 |
                      0x8);
        //       CR28: ???
        write3X4(CR29,(read3X4(CR29) & 0xCF) |
                      ((((info->var.xres * bpp) / (4*16)) & 0x300) >>4));
        write3X4(CR2A,read3X4(CR2A) | 0x40);
        write3X4(CR2B,(htotal & 0x100) >> 8 |
                      (hdispend & 0x100) >> 7 |
                      // (0x00 & 0x100) >> 6 |   hinterlace para bit 8 ???
                      (hsyncstart & 0x100) >> 5 |
                      (hblankstart & 0x100) >> 4);
        //       CR2C: ???
        //       CR2D: initialized in cyblafb_setup_GE()
        write3X4(CR2F,0x92); // conservative, better signal quality
        //       CR30: reserved
        //       CR31: reserved
        //       CR32: reserved
        //       CR33: reserved
        //       CR34: disabled in CR36
        //       CR35: disabled in CR36
        //       CR36: initialized in cyblafb_setup_GE
        //       CR37: i2c, ignore for now
        write3X4(CR38,(bpp == 8) ? 0x00 :       //
                      (bpp == 16) ? 0x05 :      // highcolor
                      (bpp == 24) ? 0x29 :      // packed 24bit truecolor
                      (bpp == 32) ? 0x09 : 0);  // truecolor, 16 bit pixelbus
        write3X4(CR39,0x01 |                    // MMIO enable
                      (pcirb ? 0x02 : 0) | // pci read burst enable
                      (pciwb ? 0x04 : 0)); // pci write burst enable
        write3X4(CR55,0x1F | // pci clocks * 2 for STOP# during 1st data phase
                      (pcirr ? 0x40 : 0) | // pci read retry enable
                      (pciwr ? 0x80 : 0)); // pci write retry enable
        write3X4(CR56,preendfetch >> 8 < 2 ? (preendfetch >> 8 & 0x01)|2 : 0);
        write3X4(CR57,preendfetch >> 8 < 2 ? preendfetch & 0xff : 0);
        write3X4(CR58,0x82);    // Bios does this .... don't know more
        //
        // Setup SRxx regs
        //
        write3C4(SR00,3);
        write3C4(SR01,1);       //set char clock 8 dots wide
        write3C4(SR02,0x0F);    //enable 4 maps needed in chain4 mode
        write3C4(SR03,0);       //no character map select
        write3C4(SR04,0x0E);    //memory mode: ext mem, even, chain4

        out8(0x3C4,0x0b);
        in8(0x3C5);             // Set NEW mode
        write3C4(SR0D,0x00);    // test ... check

        set_vclk(par,(bpp==32 ? 200000000 : 100000000)/
                 info->var.pixclock); //SR18,SR19

        //
        // Setup GRxx regs
        //
        write3CE(GR00,0x00);    // test ... check
        write3CE(GR01,0x00);    // test ... check
        write3CE(GR02,0x00);    // test ... check
        write3CE(GR03,0x00);    // test ... check
        write3CE(GR04,0x00);    // test ... check
        write3CE(GR05,0x40);    // no CGA compat,allow 256 col
        write3CE(GR06,0x05);    // graphics mode
        write3CE(GR07,0x0F);    // planes?
        write3CE(GR08,0xFF);    // test ... check
        write3CE(GR0F,(bpp==32)?0x1A:0x12); // div vclk by 2 if 32bpp, chain4
        write3CE(GR20,0xC0);    // test ... check
        write3CE(GR2F,0xA0);    // PCLK = VCLK, no skew,

        //
        // Setup ARxx regs
        //
        for(i = 0;i < 0x10;i++) // set AR00 .. AR0f
                write3C0(i,i);
        write3C0(AR10,0x41);    // graphics mode and support 256 color modes
        write3C0(AR12,0x0F);    // planes
        write3C0(AR13,0);       // horizontal pel panning
        in8(0x3DA);             // reset internal flag to 3c0 index
        out8(0x3C0,0x20);       // enable attr

        //
        // Setup hidden RAMDAC command register
        //
        in8(0x3C8);  // these reads are
        in8(0x3C6);  // necessary to
        in8(0x3C6);  // unmask the RAMDAC
        in8(0x3C6);  // command reg, otherwise
        in8(0x3C6);  // we would write the pixelmask reg!
        out8(0x3C6,(bpp ==  8) ? 0x00 :         // 256 colors
                   (bpp == 15) ? 0x10 :         //
                   (bpp == 16) ? 0x30 :         // hicolor
                   (bpp == 24) ? 0xD0 :         // truecolor
                   (bpp == 32) ? 0xD0 : 0);     // truecolor
        in8(0x3C8);

        //
        // GR31 is not mentioned in the datasheet
        //
        if (displaytype == DISPLAY_FP)
                write3CE(GR31,(read3CE(GR31) & 0x8F) |
                         ((info->var.yres > 1024) ? 0x50 :
                         (info->var.yres >   768) ? 0x30 :
                         (info->var.yres >   600) ? 0x20 :
                         (info->var.yres >   480) ? 0x10 : 0));

        info->fix.visual = (bpp == 8) ? FB_VISUAL_PSEUDOCOLOR
                                      : FB_VISUAL_TRUECOLOR;
        info->fix.line_length = info->var.xres * (bpp >> 3);
        info->cmap.len = (bpp == 8) ? 256: 16;

        //
        // init acceleration engine
        //
        cyblafb_setup_GE(info->var.xres,info->var.bits_per_pixel);

        regdump(par);

        return 0;
}

//========================
//
// Set one color register
//
//========================

static int cyblafb_setcolreg(unsigned regno, unsigned red, unsigned green,
                             unsigned blue, unsigned transp,
                             struct fb_info *info)
{
        int bpp = info->var.bits_per_pixel;

        if (regno >= info->cmap.len)
                return 1;

        if (bpp == 8) {
                out8(0x3C6,0xFF);
                out8(0x3C8,regno);
                out8(0x3C9,red>>10);
                out8(0x3C9,green>>10);
                out8(0x3C9,blue>>10);

        } else if (bpp == 16)                           // RGB 565
                ((u32*)info->pseudo_palette)[regno] =
                        (red & 0xF800) |
                        ((green & 0xFC00) >> 5) |
                        ((blue & 0xF800) >> 11);
        else if (bpp == 32)                             // ARGB 8888
                ((u32*)info->pseudo_palette)[regno] =
                        ((transp & 0xFF00) <<16) |
                        ((red & 0xFF00) << 8) |
                        ((green & 0xFF00)) |
                        ((blue & 0xFF00)>>8);

        return 0;
}

//==========================================================
//
// Try blanking the screen. For flat panels it does nothing
//
//==========================================================

static int cyblafb_blank(int blank_mode, struct fb_info *info)
{
        unsigned char PMCont,DPMSCont;

        if (displaytype == DISPLAY_FP)
                return 0;

        out8(0x83C8,0x04);              // DPMS Control
        PMCont = in8(0x83C6) & 0xFC;

        DPMSCont = read3CE(GR23) & 0xFC;

        switch (blank_mode)
        {
        case FB_BLANK_UNBLANK:       // Screen: On, HSync: On, VSync: On
        case FB_BLANK_NORMAL:        // Screen: Off, HSync: On, VSync: On
                PMCont |= 0x03;
                DPMSCont |= 0x00;
                break;
        case FB_BLANK_HSYNC_SUSPEND: // Screen: Off, HSync: Off, VSync: On
                PMCont |= 0x02;
                DPMSCont |= 0x01;
                break;
        case FB_BLANK_VSYNC_SUSPEND: // Screen: Off, HSync: On, VSync: Off
                PMCont |= 0x02;
                DPMSCont |= 0x02;
                break;
        case FB_BLANK_POWERDOWN:     // Screen: Off, HSync: Off, VSync: Off
                PMCont |= 0x00;
                DPMSCont |= 0x03;
                break;
        }

        write3CE(GR23,DPMSCont);
        out8(0x83C8,4);
        out8(0x83C6,PMCont);
        //
        // let fbcon do a softblank for us
        //
        return (blank_mode == FB_BLANK_NORMAL) ? 1 : 0;
}

static struct fb_ops cyblafb_ops __devinitdata = {
        .owner  = THIS_MODULE,
        .fb_setcolreg = cyblafb_setcolreg,
        .fb_pan_display = cyblafb_pan_display,
        .fb_blank = cyblafb_blank,
        .fb_check_var = cyblafb_check_var,
        .fb_set_par = cyblafb_set_par,
        .fb_fillrect = cyblafb_fillrect,
        .fb_copyarea= cyblafb_copyarea,
        .fb_imageblit = cyblafb_imageblit,
        .fb_cursor = soft_cursor,
};

//==========================================================================
//
// getstartupmode() decides about the inital video mode
//
// There is no reason to use modedb, a lot of video modes there would
// need altered timings to display correctly. So I decided that it is much
// better to provide a limited optimized set of modes plus the option of
// using the mode in effect at startup time (might be selected using the
// vga=??? paramter). After that the user might use fbset to select any
// mode he likes, check_var will not try to alter geometry parameters as
// it would be necessary otherwise.
//
//==========================================================================

static int __devinit getstartupmode(struct fb_info *info)
{
        u32     htotal,hdispend,hsyncstart,hsyncend,hblankstart,hblankend,
                vtotal,vdispend,vsyncstart,vsyncend,vblankstart,vblankend,
                cr00,cr01,cr02,cr03,cr04,cr05,cr2b,
                cr06,cr07,cr09,cr10,cr11,cr12,cr15,cr16,cr27,
                cr38,
                sr0d,sr18,sr19,
                gr0f,
                fi,pxclkdiv,vclkdiv,tmp,i;

        struct modus {
                int xres; int yres; int vyres; int bpp; int pxclk;
                int left_margin; int right_margin; int upper_margin;
                int lower_margin; int hsync_len; int vsync_len;
        }  modedb[5] = {
                {   0,    0, 8000, 0, 0,   0,  0,  0, 0,   0,  0},
                { 640,  480, 3756, 0, 0, -40, 24, 17, 0, 216,  3},
                { 800,  600, 3221, 0, 0,  96, 24, 14, 0, 136, 11},
                {1024,  768, 2815, 0, 0, 144, 24, 29, 0, 120,  3},
                {1280, 1024, 2662, 0, 0, 232, 16, 39, 0, 160,  3}
        };

        outb(0x00,0x3d4); cr00=inb(0x3d5); outb(0x01,0x3d4); cr01=inb(0x3d5);
        outb(0x02,0x3d4); cr02=inb(0x3d5); outb(0x03,0x3d4); cr03=inb(0x3d5);
        outb(0x04,0x3d4); cr04=inb(0x3d5); outb(0x05,0x3d4); cr05=inb(0x3d5);
        outb(0x06,0x3d4); cr06=inb(0x3d5); outb(0x07,0x3d4); cr07=inb(0x3d5);
        outb(0x09,0x3d4); cr09=inb(0x3d5); outb(0x10,0x3d4); cr10=inb(0x3d5);
        outb(0x11,0x3d4); cr11=inb(0x3d5); outb(0x12,0x3d4); cr12=inb(0x3d5);
        outb(0x15,0x3d4); cr15=inb(0x3d5); outb(0x16,0x3d4); cr16=inb(0x3d5);
        outb(0x27,0x3d4); cr27=inb(0x3d5); outb(0x2b,0x3d4); cr2b=inb(0x3d5);
        outb(0x38,0x3d4); cr38=inb(0x3d5); outb(0x0b,0x3c4); inb(0x3c5);
        outb(0x0d,0x3c4); sr0d=inb(0x3c5); outb(0x18,0x3c4); sr18=inb(0x3c5);
        outb(0x19,0x3c4); sr19=inb(0x3c5); outb(0x0f,0x3ce); gr0f=inb(0x3cf);

        htotal      = cr00 | (cr2b & 0x01) << 8;
        hdispend    = cr01 | (cr2b & 0x02) << 7;
        hblankstart = cr02 | (cr2b & 0x10) << 4;
        hblankend   = (cr03 & 0x1f) | (cr05 & 0x80) >> 2;
        hsyncstart  = cr04 | (cr2b & 0x08) << 5;
        hsyncend    = cr05 & 0x1f;

        modedb[0].xres = hblankstart * 8;
        modedb[0].hsync_len = hsyncend * 8;
        modedb[0].right_margin = hsyncstart * 8 - modedb[0].xres;
        modedb[0].left_margin = (htotal + 5) * 8 - modedb[0].xres -
                modedb[0].right_margin - modedb[0].hsync_len;

        vtotal      = cr06 | (cr07 & 0x01) << 8 | (cr07 & 0x20) << 4
                           | (cr27 & 0x80) << 3;
        vdispend    = cr12 | (cr07 & 0x02) << 7 | (cr07 & 0x40) << 3
                           | (cr27 & 0x10) << 6;
        vsyncstart  = cr10 | (cr07 & 0x04) << 6 | (cr07 & 0x80) << 2
                           | (cr27 & 0x20) << 5;
        vsyncend    = cr11 & 0x0f;
        vblankstart = cr15 | (cr07 & 0x08) << 5 | (cr09 & 0x20) << 4
                           | (cr27 & 0x40) << 4;
        vblankend   = cr16;

        modedb[0].yres         = vdispend + 1;
        modedb[0].vsync_len    = vsyncend;
        modedb[0].lower_margin = vsyncstart - modedb[0].yres;
        modedb[0].upper_margin = vtotal - modedb[0].yres -
                modedb[0].lower_margin - modedb[0].vsync_len + 2;

        tmp = cr38 & 0x3c;
        modedb[0].bpp = tmp == 0 ? 8 : tmp == 4 ? 16 : tmp == 28 ? 24 :
                        tmp == 8 ? 32 : 8;

        fi = ((5864727*(sr18+8))/(((sr19&0x3f)+2)*(1<<((sr19&0xc0)>>6))))>>12;
        pxclkdiv = ((gr0f & 0x08) >> 3 | (gr0f & 0x40) >> 5) + 1;
        tmp = sr0d & 0x06;
        vclkdiv = tmp == 0 ? 2 : tmp == 2 ? 4 : tmp == 4 ? 8 : 3; // * 2 !
        modedb[0].pxclk = ((100000000 * pxclkdiv * vclkdiv) >> 1) / fi;

        if (verbosity > 0)
                output("detected startup mode: "
                       "fbset -g %d %d %d ??? %d -t %d %d %d %d %d %d %d\n",
                       modedb[0].xres,modedb[0].yres,modedb[0].xres,
                       modedb[0].bpp,modedb[0].pxclk,modedb[0].left_margin,
                       modedb[0].right_margin,modedb[0].upper_margin,
                       modedb[0].lower_margin,modedb[0].hsync_len,
                       modedb[0].vsync_len);

        //
        // We use this goto target in case of a failed check_var. No, I really
        // do not want to do it in another way!
        //

        tryagain:

        i = (mode == NULL) ? 0 :
            !strncmp(mode,"640x480",7) ? 1 :
            !strncmp(mode,"800x600",7) ? 2 :
            !strncmp(mode,"1024x768",8) ? 3 :
            !strncmp(mode,"1280x1024",9) ? 4 : 0;

        ref = (ref < 50) ? 50 : (ref > 85) ? 85 : ref;

        if(i==0) {
                info->var.pixclock = modedb[i].pxclk;
                info->var.bits_per_pixel = modedb[i].bpp;
        } else {
                info->var.pixclock = (100000000 /
                        ((modedb[i].left_margin + modedb[i].xres +
                          modedb[i].right_margin + modedb[i].hsync_len
                         ) * (
                          modedb[i].upper_margin + modedb[i].yres +
                          modedb[i].lower_margin + modedb[i].vsync_len
                         ) *
                          ref / 10000
                        ));
                info->var.bits_per_pixel = bpp;
        }

        info->var.left_margin = modedb[i].left_margin;
        info->var.right_margin = modedb[i].right_margin;
        info->var.xres = modedb[i].xres;
        info->var.xres_virtual = modedb[i].xres;
        info->var.xoffset = 0;
        info->var.hsync_len = modedb[i].hsync_len;
        info->var.upper_margin = modedb[i].upper_margin;
        info->var.yres = modedb[i].yres;
        info->var.yres_virtual = modedb[i].vyres;
        info->var.yoffset = 0;
        info->var.lower_margin = modedb[i].lower_margin;
        info->var.vsync_len = modedb[i].vsync_len;
        info->var.sync = 0;
        info->var.vmode = FB_VMODE_NONINTERLACED;

        if(cyblafb_check_var(&info->var,info)) {
                // 640x480-8@75 should really never fail. One case would
                // be fp == 1 and nativex < 640 ... give up then
                if(i==1 && bpp == 8 && ref == 75){
                        output("Can't find a valid mode :-(\n");
                        return -EINVAL;
                }
                // Our detected mode is unlikely to fail. If it does,
                // try 640x480-8@75 ...
                if(i==0) {
                        mode="640x480";
                        bpp=8;
                        ref=75;
                        output("Detected mode failed check_var! "
                               "Trying 640x480-8@75\n");
                        goto tryagain;
                }
                // A specified video mode failed for some reason.
                // Try the startup mode first
                output("Specified mode '%s' failed check! "
                        "Falling back to startup mode.\n",mode);
                mode=NULL;
                goto tryagain;
        }

        return 0;

}

//========================================================
//
// Detect activated memory size. Undefined values require
// memsize parameter.
//
//========================================================

static unsigned int __devinit get_memsize(void)
{
        unsigned char tmp;
        unsigned int k;

        if (memsize)
                k = memsize * Kb;
        else {
                tmp = read3X4(CR1F) & 0x0F;
                switch (tmp) {
                        case 0x03: k = 1 * Mb; break;
                        case 0x07: k = 2 * Mb; break;
                        case 0x0F: k = 4 * Mb; break;
                        case 0x04: k = 8 * Mb; break;
                        default:
                                k = 1 * Mb;
                                output("Unknown memory size code %x in CR1F."
                                       " We default to 1 Mb for now, please"
                                       " do provide a memsize parameter!\n",
                                       tmp);
                }
        }

        if (verbosity > 0)
                output("framebuffer size = %d Kb\n",k/Kb);
        return k;
}

//=========================================================
//
// Detect if a flat panel monitor connected to the special
// interface is active. Override is possible by fp and crt
// parameters.
//
//=========================================================

static unsigned int __devinit get_displaytype(void)
{
        if (fp)
                return DISPLAY_FP;
        if (crt)
                return DISPLAY_CRT;
        return (read3CE(GR33) & 0x10)?DISPLAY_FP:DISPLAY_CRT;
}

//=====================================
//
// Get native resolution of flat panel
//
//=====================================

static int __devinit get_nativex(void)
{
        int x,y,tmp;

        if (nativex)
                return nativex;

        tmp = (read3CE(GR52) >> 4) & 3;

        switch (tmp) {
                case 0:  x = 1280; y = 1024; break;
                case 2:  x = 1024; y = 768;  break;
                case 3:  x = 800;  y = 600;  break;
                case 4:  x = 1400; y = 1050; break;
                case 1:
                default: x = 640;  y = 480;  break;
        }

        if (verbosity > 0)
                output("%dx%d flat panel found\n",x,y);
        return x;
}

static int __devinit cybla_pci_probe(struct pci_dev * dev,
                                     const struct pci_device_id * id)
{
        struct fb_info *info;
        struct cyblafb_par *par;

        info = framebuffer_alloc(sizeof(struct cyblafb_par),&dev->dev);

        if (!info)
                goto errout_alloc;

        par = info->par;
        par->ops = cyblafb_ops;

        info->fix = cyblafb_fix;
        info->fbops = &par->ops;
        info->fix = cyblafb_fix;

        if (pci_enable_device(dev)) {
                output("could not enable device!\n");
                goto errout_enable;
        }

        // might already be requested by vga console or vesafb,
        // so we do care about success
        request_region(0x3c0,32,"cyblafb");

        //
        // Graphics Engine Registers
        //
        request_region(GEBase,0x100,"cyblafb");

        regdump(par);

        enable_mmio();

        // setup MMIO region
        info->fix.mmio_start = pci_resource_start(dev,1);
        info->fix.mmio_len = 0x20000;

        if (!request_mem_region(info->fix.mmio_start,
                                info->fix.mmio_len,"cyblafb")) {
                output("request_mem_region failed for mmio region!\n");
                goto errout_mmio_reqmem;
        }

        io_virt = ioremap_nocache(info->fix.mmio_start, info->fix.mmio_len);

        if (!io_virt) {
                output("ioremap failed for mmio region\n");
                goto errout_mmio_remap;
        }

        // setup framebuffer memory ... might already be requested
        // by vesafb. Not to fail in case of an unsuccessful request
        // is useful for the development cycle
        info->fix.smem_start = pci_resource_start(dev,0);
        info->fix.smem_len = get_memsize();

        if (!request_mem_region(info->fix.smem_start,
                                info->fix.smem_len,"cyblafb")) {
                output("request_mem_region failed for smem region!\n");
                if (!vesafb)
                        goto errout_smem_req;
        }

        info->screen_base = ioremap_nocache(info->fix.smem_start,
                                            info->fix.smem_len);

        if (!info->screen_base) {
                output("ioremap failed for smem region\n");
                goto errout_smem_remap;
        }

        displaytype = get_displaytype();

        if(displaytype == DISPLAY_FP)
                nativex = get_nativex();

        //
        // FBINFO_HWACCEL_YWRAP    .... does not work (could be made to work?)
        // FBINFO_PARTIAL_PAN_OK   .... is not ok
        // FBINFO_READS_FAST       .... is necessary for optimal scrolling
        //
        info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN
                      | FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT
                      | FBINFO_HWACCEL_IMAGEBLIT | FBINFO_READS_FAST;

        info->pseudo_palette = par->pseudo_pal;

        if(getstartupmode(info))
                goto errout_findmode;

        fb_alloc_cmap(&info->cmap,256,0);

        if (register_framebuffer(info)) {
                output("Could not register CyBla framebuffer\n");
                goto errout_register;
        }

        pci_set_drvdata(dev,info);

        //
        // normal exit and error paths
        //

        return 0;

 errout_register:
 errout_findmode:
        iounmap(info->screen_base);
 errout_smem_remap:
        release_mem_region(info->fix.smem_start,
                           info->fix.smem_len);
 errout_smem_req:
        iounmap(io_virt);
 errout_mmio_remap:
        release_mem_region(info->fix.mmio_start,
                           info->fix.mmio_len);
 errout_mmio_reqmem:
//      release_region(0x3c0,32);
 errout_enable:
        framebuffer_release(info);
 errout_alloc:
        output("CyblaFB version %s aborting init.\n",VERSION);
        return -ENODEV;
}

static void __devexit cybla_pci_remove(struct pci_dev *dev)
{
        struct fb_info *info = pci_get_drvdata(dev);

        unregister_framebuffer(info);
        iounmap(io_virt);
        iounmap(info->screen_base);
        release_mem_region(info->fix.smem_start,info->fix.smem_len);
        release_mem_region(info->fix.mmio_start,info->fix.mmio_len);
        fb_dealloc_cmap(&info->cmap);
        framebuffer_release(info);
        output("CyblaFB version %s normal exit.\n",VERSION);
}

//
// List of boards that we are trying to support
//
static struct pci_device_id cybla_devices[] = {
        {PCI_VENDOR_ID_TRIDENT,CYBERBLADEi1,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
        {0,}
};

MODULE_DEVICE_TABLE(pci,cybla_devices);

static struct pci_driver cyblafb_pci_driver = {
        .name           = "cyblafb",
        .id_table       = cybla_devices,
        .probe          = cybla_pci_probe,
        .remove         = __devexit_p(cybla_pci_remove)
};

//=============================================================
//
// kernel command line example:
//
//      video=cyblafb:1280x1024,bpp=16,ref=50 ...
//
// modprobe command line example:
//
//      modprobe cyblafb mode=1280x1024 bpp=16 ref=50 ...
//
//=============================================================

static int __devinit cyblafb_init(void)
{
#ifndef MODULE
        char *options = NULL;
        char *opt;

        if (fb_get_options("cyblafb",&options))
                return -ENODEV;

        if (options && *options)
                while((opt = strsep(&options,",")) != NULL ) {
                        if (!*opt) continue;
                        else if (!strncmp(opt,"bpp=",4))
                                bpp = simple_strtoul(opt+4,NULL,0);
                        else if (!strncmp(opt,"ref=",4))
                                ref = simple_strtoul(opt+4,NULL,0);
                        else if (!strncmp(opt,"fp",2))
                                displaytype = DISPLAY_FP;
                        else if (!strncmp(opt,"crt",3))
                                displaytype = DISPLAY_CRT;
                        else if (!strncmp(opt,"nativex=",8))
                                nativex = simple_strtoul(opt+8,NULL,0);
                        else if (!strncmp(opt,"center",6))
                                center = 1;
                        else if (!strncmp(opt,"stretch",7))
                                stretch = 1;
                        else if (!strncmp(opt,"pciwb=",6))
                                pciwb = simple_strtoul(opt+6,NULL,0);
                        else if (!strncmp(opt,"pcirb=",6))
                                pcirb = simple_strtoul(opt+6,NULL,0);
                        else if (!strncmp(opt,"pciwr=",6))
                                pciwr = simple_strtoul(opt+6,NULL,0);
                        else if (!strncmp(opt,"pcirr=",6))
                                pcirr = simple_strtoul(opt+6,NULL,0);
                        else if (!strncmp(opt,"memsize=",8))
                                memsize = simple_strtoul(opt+8,NULL,0);
                        else if (!strncmp(opt,"verbosity=",10))
                                verbosity = simple_strtoul(opt+10,NULL,0);
                        else if (!strncmp(opt,"vesafb",6))
                                vesafb = 1;
                        else
                                mode = opt;
                }
#endif
        output("CyblaFB version %s initializing\n",VERSION);
        return pci_module_init(&cyblafb_pci_driver);
}

static void __exit cyblafb_exit(void)
{
        pci_unregister_driver(&cyblafb_pci_driver);
}

module_init(cyblafb_init);
module_exit(cyblafb_exit);

MODULE_AUTHOR("Knut Petersen <knut_petersen@t-online.de>");
MODULE_DESCRIPTION("Framebuffer driver for Cyberblade/i1 graphics core");
MODULE_LICENSE("GPL");