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#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 */
};
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