Subversion Repositories planix.SVN

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

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

/*
 * S3 86C80[15] GUI Accelerator.
 */
static void
snarf(Vga* vga, Ctlr* ctlr)
{
        s3generic.snarf(vga, ctlr);
}

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

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

        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);

        /*
         * 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)/4;
        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;
}

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]);

        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 s3801 = {
        "s3801",                        /* name */
        snarf,                          /* snarf */
        options,                        /* options */
        init,                           /* init */
        load,                           /* load */
        dump,                           /* dump */
};

Ctlr s3805 = {
        "s3805",                        /* name */
        snarf,                          /* snarf */
        options,                        /* options */
        init,                           /* init */
        load,                           /* load */
        dump,                           /* dump */
};