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#include <u.h>
#include <libc.h>
#include <bio.h>
#include "pci.h"
#include "vga.h"
/*
* S3 Vision968 GUI Accelerator.
*/
static void
snarf(Vga* vga, Ctlr* ctlr)
{
s3generic.snarf(vga, ctlr);
vga->sequencer[0x09] = vgaxi(Seqx, 0x09);
vga->sequencer[0x0A] = vgaxi(Seqx, 0x0A);
vga->crt[0x22] = vgaxi(Crtx, 0x22);
vga->crt[0x24] = vgaxi(Crtx, 0x24);
vga->crt[0x26] = vgaxi(Crtx, 0x26);
vga->crt[0x2D] = vgaxi(Crtx, 0x2D);
vga->crt[0x2E] = vgaxi(Crtx, 0x2E);
vga->crt[0x2F] = vgaxi(Crtx, 0x2F);
}
static void
options(Vga*, Ctlr* ctlr)
{
ctlr->flag |= Hlinear|Henhanced|Foptions;
}
static void
init(Vga* vga, Ctlr* ctlr)
{
Mode *mode;
ulong x;
int sid, dbl, bpp, divide;
char *val;
if(vga->mode->z > 8)
error("depth %d not supported\n", vga->mode->z);
mode = vga->mode;
if(vga->ramdac && (vga->ramdac->flag & Uclk2)){
resyncinit(vga, ctlr, Uenhanced, 0);
vga->crt[0x00] = ((mode->ht/2)>>3)-5;
vga->crt[0x01] = ((mode->x/2)>>3)-1;
vga->crt[0x02] = ((mode->shb/2)>>3)-1;
x = (mode->ehb/2)>>3;
vga->crt[0x03] = 0x80|(x & 0x1F);
vga->crt[0x04] = (mode->shs/2)>>3;
vga->crt[0x05] = ((mode->ehs/2)>>3) & 0x1F;
if(x & 0x20)
vga->crt[0x05] |= 0x80;
vga->crt[0x13] = mode->x/8;
}
else if(mode->z == 8)
resyncinit(vga, ctlr, Uenhanced, 0);
s3generic.init(vga, ctlr);
/*
if((ctlr->flag & Uenhanced) == 0)
vga->crt[0x33] &= ~0x20;
*/
vga->crt[0x3B] = (vga->crt[0]+vga->crt[4]+1)/2;
if(vga->crt[0x3B] & 0x100)
vga->crt[0x5D] |= 0x40;
vga->crt[0x55] = 0x00;
vga->crt[0x40] &= ~0x10;
vga->crt[0x53] &= ~0x20;
vga->crt[0x58] &= ~0x48;
vga->crt[0x65] = 0x00;
vga->crt[0x66] &= ~0x07;
vga->crt[0x67] = 0x00;
vga->crt[0x6D] = 0x00;
if(ctlr->flag & Uenhanced){
if(vga->ramdac && (vga->ramdac->flag & Hextsid)){
if(vga->ramdac->flag & Hsid32)
sid = 32;
else
sid = 64;
if(vga->ramdac->flag & Uclk2)
dbl = 2;
else
dbl = 1;
if(mode->z < 4)
bpp = 4;
else
bpp = mode->z;
divide = sid/(dbl*bpp);
switch(divide){
case 2:
vga->crt[0x66] |= 0x01;
break;
case 4:
vga->crt[0x66] |= 0x02;
break;
case 8:
vga->crt[0x66] |= 0x03;
break;
case 16:
vga->crt[0x66] |= 0x04;
break;
case 32:
vga->crt[0x66] |= 0x05;
break;
}
}
vga->crt[0x40] |= 0x10;
vga->crt[0x58] |= 0x40;
/*
* The test against 1376 is necessary for the STB
* Velocity 64 Video, no idea if it's relevant to other
* cards.
* Although not mentioned in the databook, bit 4 of Crt67
* needs to be set on the STB Velocity 64 Video too. Gak.
*/
if(dbattr(vga->attr, "disa1sc") && mode->x <= 1376)
vga->crt[0x65] |= 0x02;
if(vga->ramdac && strncmp(vga->ramdac->name, "tvp3026", 7))
vga->crt[0x67] |= 0x10;
if(dbattr(vga->attr, "vclkphs"))
vga->crt[0x67] |= 0x01;
if(val = dbattr(vga->attr, "delaybl"))
vga->crt[0x6D] |= strtoul(val, 0, 0) & 0x07;
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, 0x65, vga->crt[0x65]);
vgaxo(Crtx, 0x66, vga->crt[0x66]);
vgaxo(Crtx, 0x67, vga->crt[0x67]);
vgaxo(Crtx, 0x6D, vga->crt[0x6D]);
advfunc = 0x0000;
if(ctlr->flag & Uenhanced)
advfunc = 0x0001;
outportw(0x4AE8, advfunc);
}
static void
dump(Vga* vga, Ctlr* ctlr)
{
s3generic.dump(vga, ctlr);
printitem(ctlr->name, "Seq09");
printreg(vga->sequencer[0x09]);
printreg(vga->sequencer[0x0A]);
printitem(ctlr->name, "Crt22");
printreg(vga->crt[0x22]);
printitem(ctlr->name, "Crt24");
printreg(vga->crt[0x24]);
printitem(ctlr->name, "Crt26");
printreg(vga->crt[0x26]);
printitem(ctlr->name, "Crt2D");
printreg(vga->crt[0x2D]);
printreg(vga->crt[0x2E]);
printreg(vga->crt[0x2F]);
}
Ctlr vision968 = {
"vision968", /* name */
snarf, /* snarf */
options, /* options */
init, /* init */
load, /* load */
dump, /* dump */
};
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