Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>
#include <bio.h>

#include "pci.h"
#include "vga.h"

/*
 * S3 Vision864 GUI Accelerator.
 * Pretty much the same as the 86C80[15].
 * First pass, needs tuning.
 */
static void
snarf(Vga* vga, Ctlr* ctlr)
{
        s3generic.snarf(vga, ctlr);
}

static void
options(Vga*, Ctlr* ctlr)
{
        ctlr->flag |= Hlinear|Hpclk2x8|Henhanced|Foptions;
}

static void
init(Vga* vga, Ctlr* ctlr)
{
        ulong x;
        char *val;

        s3generic.init(vga, ctlr);
        vga->crt[0x3B] = vga->crt[0]-5;

        if(vga->mode->z > 8)
                error("depth %d not supported\n", vga->mode->z);

        /*
         * VL-bus crap.
         */
        if((vga->crt[0x36] & 0x03) == 0x01){
                vga->crt[0x40] |= 0x08;
                vga->crt[0x58] &= ~0x88;
        }

        /*
         * Display memory access control.
         * Calculation of the M-parameter (Crt54) is
         * memory-system and dot-clock dependent, the
         * values below are guesses from dumping
         * registers.
         */
        vga->crt[0x60] = 0xFF;
        x = vga->mode->x/8;
        vga->crt[0x61] = 0x80|((x>>8) & 0x07);
        vga->crt[0x62] = (x & 0xFF);
        if(vga->mode->x <= 800)
                vga->crt[0x54] = 0x88;
        else if(vga->mode->x <= 1024)
                vga->crt[0x54] = 0xF8;
        else
                vga->crt[0x54] = 0x40;

        vga->crt[0x67] &= ~0xF0;
        if(ctlr->flag & Upclk2x8)
                vga->crt[0x67] |= 0x10;

        vga->crt[0x69] = 0x00;
        vga->crt[0x6A] = 0x00;

        /*
         * Blank adjust.
         * This may not be correct for all monitors.
         */
        vga->crt[0x6D] = 0x00;
        if(val = dbattr(vga->attr, "delaybl"))
                vga->crt[0x6D] |= strtoul(val, 0, 0) & 0x07;
        else
                vga->crt[0x6D] |= 2;
        if(val = dbattr(vga->attr, "delaysc"))
                vga->crt[0x6D] |= (strtoul(val, 0, 0) & 0x07)<<4;
}

static void
load(Vga* vga, Ctlr* ctlr)
{
        ushort advfunc;

        s3generic.load(vga, ctlr);
        vgaxo(Crtx, 0x60, vga->crt[0x60]);
        vgaxo(Crtx, 0x61, vga->crt[0x61]);
        vgaxo(Crtx, 0x62, vga->crt[0x62]);
        vgaxo(Crtx, 0x67, vga->crt[0x67]);
        vgaxo(Crtx, 0x69, vga->crt[0x69]);
        vgaxo(Crtx, 0x6A, vga->crt[0x6A]);
        vgaxo(Crtx, 0x6D, vga->crt[0x6D]);

        advfunc = 0x0000;
        if(ctlr->flag & Uenhanced){
                if(vga->mode->x == 1024 || vga->mode->x == 800)
                        advfunc = 0x0057;
                else
                        advfunc = 0x0053;
        }
        outportw(0x4AE8, advfunc);
}

static void
dump(Vga* vga, Ctlr* ctlr)
{
        s3generic.dump(vga, ctlr);
}

Ctlr vision864 = {
        "vision864",                    /* name */
        snarf,                          /* snarf */
        options,                        /* options */
        init,                           /* init */
        load,                           /* load */
        dump,                           /* dump */
};