ref: 9ced712a2ad70557a8ceb89ff3b969b92c85f68c
dir: /sys/src/cmd/aux/vga/s3generic.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include "pci.h"
#include "vga.h"
/*
* Generic S3 GUI Accelerator.
*/
static void
snarf(Vga* vga, Ctlr* ctlr)
{
int i;
trace("%s->snarf->s3generic\n", ctlr->name);
/*
* Unlock extended registers.
* 0xA5 ensures Crt36 and Crt37 are also unlocked
* (0xA0 unlocks everything else).
*/
vgaxo(Crtx, 0x38, 0x48);
vgaxo(Crtx, 0x39, 0xA5);
/*
* Not all registers exist on all chips.
* Crt3[EF] don't exist on any.
*/
for(i = 0x30; i < 0x70; i++)
vga->crt[i] = vgaxi(Crtx, i);
/*
* Memory size.
*/
switch((vga->crt[0x36]>>5) & 0x07){
case 0x00:
vga->vmz = 4*1024*1024;
break;
case 0x02:
vga->vmz = 3*1024*1024;
break;
case 0x04:
vga->vmz = 2*1024*1024;
break;
case 0x06:
vga->vmz = 1*1024*1024;
break;
case 0x07:
vga->vmz = 512*1024;
break;
}
ctlr->flag |= Fsnarf;
}
static void
init(Vga* vga, Ctlr* ctlr)
{
Mode *mode;
ulong x;
trace("%s->init->s3generic\n", ctlr->name);
mode = vga->mode;
/*
* Is enhanced mode is necessary?
*/
if((ctlr->flag & (Uenhanced|Henhanced)) == Henhanced){
if(mode->z >= 8)
resyncinit(vga, ctlr, Uenhanced, 0);
else
resyncinit(vga, ctlr, 0, Uenhanced|Henhanced);
}
if((ctlr->flag & Uenhanced) == 0 && mode->x > 1024)
error("%s: no support for 1-bit mode > 1024x768x1\n", ctlr->name);
vga->crt[0x31] = 0x85;
vga->crt[0x6A] &= 0xC0;
vga->crt[0x32] &= ~0x40;
vga->crt[0x31] |= 0x08;
vga->crt[0x32] |= 0x40;
vga->crt[0x33] |= 0x20;
if(mode->z >= 8)
vga->crt[0x3A] |= 0x10;
else
vga->crt[0x3A] &= ~0x10;
vga->crt[0x34] = 0x10;
vga->crt[0x35] = 0x00;
if(mode->interlace){
vga->crt[0x3C] = vga->crt[0]/2;
vga->crt[0x42] |= 0x20;
}
else{
vga->crt[0x3C] = 0x00;
vga->crt[0x42] &= ~0x20;
}
vga->crt[0x40] = (vga->crt[0x40] & 0xF2);
vga->crt[0x43] = 0x00;
vga->crt[0x45] = 0x00;
vga->crt[0x50] &= 0x3E;
if(mode->x <= 640)
x = 0x40;
else if(mode->x <= 800)
x = 0x80;
else if(mode->x <= 1024)
x = 0x00;
else if(mode->x <= 1152)
x = 0x01;
else if(mode->x <= 1280)
x = 0xC0;
else
x = 0x81;
vga->crt[0x50] |= x;
vga->crt[0x51] = (vga->crt[0x51] & 0xC3)|((vga->crt[0x13]>>4) & 0x30);
vga->crt[0x53] &= ~0x10;
/*
* Set up linear aperture. For the moment it's 64K at 0xA0000.
* The real base address will be assigned before load is called.
*/
vga->crt[0x58] = 0x88;
if(ctlr->flag & Uenhanced){
vga->crt[0x58] |= 0x10;
if(vga->linear && (ctlr->flag & Hlinear))
ctlr->flag |= Ulinear;
if(vga->vmz <= 1024*1024)
vga->vma = 1024*1024;
else if(vga->vmz <= 2*1024*1024)
vga->vma = 2*1024*1024;
else
vga->vma = 8*1024*1024;
}
vga->crt[0x59] = 0x00;
vga->crt[0x5A] = 0x0A;
vga->crt[0x5D] &= 0x80;
if(vga->crt[0x00] & 0x100)
vga->crt[0x5D] |= 0x01;
if(vga->crt[0x01] & 0x100)
vga->crt[0x5D] |= 0x02;
if(vga->crt[0x02] & 0x100)
vga->crt[0x5D] |= 0x04;
if(vga->crt[0x04] & 0x100)
vga->crt[0x5D] |= 0x10;
if(vga->crt[0x3B] & 0x100)
vga->crt[0x5D] |= 0x40;
vga->crt[0x5E] = 0x40;
if(vga->crt[0x06] & 0x400)
vga->crt[0x5E] |= 0x01;
if(vga->crt[0x12] & 0x400)
vga->crt[0x5E] |= 0x02;
if(vga->crt[0x15] & 0x400)
vga->crt[0x5E] |= 0x04;
if(vga->crt[0x10] & 0x400)
vga->crt[0x5E] |= 0x10;
ctlr->type = s3generic.name;
ctlr->flag |= Finit;
}
static void
load(Vga* vga, Ctlr* ctlr)
{
ulong l;
trace("%s->load->s3generic\n", ctlr->name);
vgaxo(Crtx, 0x31, vga->crt[0x31]);
vgaxo(Crtx, 0x32, vga->crt[0x32]);
vgaxo(Crtx, 0x33, vga->crt[0x33]);
vgaxo(Crtx, 0x34, vga->crt[0x34]);
vgaxo(Crtx, 0x35, vga->crt[0x35]);
vgaxo(Crtx, 0x3A, vga->crt[0x3A]);
vgaxo(Crtx, 0x3B, vga->crt[0x3B]);
vgaxo(Crtx, 0x3C, vga->crt[0x3C]);
vgaxo(Crtx, 0x40, vga->crt[0x40]|0x01);
vgaxo(Crtx, 0x42, vga->crt[0x42]);
vgaxo(Crtx, 0x43, vga->crt[0x43]);
vgaxo(Crtx, 0x45, vga->crt[0x45]);
vgaxo(Crtx, 0x50, vga->crt[0x50]);
vgaxo(Crtx, 0x51, vga->crt[0x51]);
vgaxo(Crtx, 0x53, vga->crt[0x53]);
vgaxo(Crtx, 0x54, vga->crt[0x54]);
vgaxo(Crtx, 0x55, vga->crt[0x55]);
if(ctlr->flag & Ulinear){
l = vga->vmb>>16;
vga->crt[0x59] = (l>>8) & 0xFF;
vga->crt[0x5A] = l & 0xFF;
if(vga->vmz <= 1024*1024)
vga->crt[0x58] |= 0x01;
else if(vga->vmz <= 2*1024*1024)
vga->crt[0x58] |= 0x02;
else
vga->crt[0x58] |= 0x03;
}
vgaxo(Crtx, 0x59, vga->crt[0x59]);
vgaxo(Crtx, 0x5A, vga->crt[0x5A]);
vgaxo(Crtx, 0x58, vga->crt[0x58]);
vgaxo(Crtx, 0x5D, vga->crt[0x5D]);
vgaxo(Crtx, 0x5E, vga->crt[0x5E]);
vgaxo(Crtx, 0x6A, vga->crt[0x6A]);
ctlr->flag |= Fload;
}
static void
dump(Vga* vga, Ctlr* ctlr)
{
int i, id, interlace, mul, div;
char *name;
ushort shb, vrs, x;
name = ctlr->name;
printitem(name, "Crt30");
for(i = 0x30; i < 0x3E; i++)
printreg(vga->crt[i]);
printitem(name, "Crt40");
for(i = 0x40; i < 0x50; i++)
printreg(vga->crt[i]);
printitem(name, "Crt50");
for(i = 0x50; i < 0x60; i++)
printreg(vga->crt[i]);
printitem(name, "Crt60");
for(i = 0x60; i < 0x70; i++)
printreg(vga->crt[i]);
/*
* Try to disassemble the snarfed values into
* understandable numbers.
* Only do this if we weren't called after Finit.
*/
if(ctlr->flag & Finit)
return;
/*
* If hde <= 400, assume this is a 928 or Vision964
* and the horizontal values have been divided by 4.
*
* if ViRGE/[DG]X and 15 or 16bpp, horizontal values have
* been multiplied by 2.
*/
mul = 1;
div = 1;
if(strcmp(name, "virge") == 0){
id = (vga->crt[0x2D]<<8)|vga->crt[0x2E];
/* S3 ViRGE/[DG]X */
if(id==0x8A01 && ((vga->crt[0x67] & 0x30) || (vga->crt[0x67] & 0x50))){
mul = 1;
div = 2;
}
}
x = vga->crt[0x01];
if(vga->crt[0x5D] & 0x02)
x |= 0x100;
x = (x+1)<<3;
if(x <= 400){
mul = 4;
div = 1;
}
x = (x * mul) / div;
printitem(name, "hde");
printreg(x);
Bprint(&stdout, "%6ud", x);
shb = vga->crt[0x02];
if(vga->crt[0x5D] & 0x04)
shb |= 0x100;
shb = (shb+1)<<3;
shb = (shb * mul) / div;
printitem(name, "shb");
printreg(shb);
Bprint(&stdout, "%6ud", shb);
x = vga->crt[0x03] & 0x1F;
if(vga->crt[0x05] & 0x80)
x |= 0x20;
x = (x * mul) / div;
x = shb|x; /* ???? */
if(vga->crt[0x5D] & 0x08)
x += 64;
printitem(name, "ehb");
printreg(x);
Bprint(&stdout, "%6ud", x);
x = vga->crt[0x00];
if(vga->crt[0x5D] & 0x01)
x |= 0x100;
x = (x+5)<<3;
x = (x * mul) / div;
printitem(name, "ht");
printreg(x);
Bprint(&stdout, "%6ud", x);
interlace = vga->crt[0x42] & 0x20;
x = vga->crt[0x12];
if(vga->crt[0x07] & 0x02)
x |= 0x100;
if(vga->crt[0x07] & 0x40)
x |= 0x200;
if(vga->crt[0x5E] & 0x02)
x |= 0x400;
x += 1;
if(interlace)
x *= 2;
printitem(name, "vde");
printreg(x);
Bprint(&stdout, "%6ud", x);
vrs = vga->crt[0x10];
if(vga->crt[0x07] & 0x04)
vrs |= 0x100;
if(vga->crt[0x07] & 0x80)
vrs |= 0x200;
if(vga->crt[0x5E] & 0x10)
vrs |= 0x400;
if(interlace)
vrs *= 2;
printitem(name, "vrs");
printreg(vrs);
Bprint(&stdout, "%6ud", vrs);
if(interlace)
vrs /= 2;
x = (vrs & ~0x0F)|(vga->crt[0x11] & 0x0F);
if(interlace)
x *= 2;
printitem(name, "vre");
printreg(x);
Bprint(&stdout, "%6ud", x);
x = vga->crt[0x06];
if(vga->crt[0x07] & 0x01)
x |= 0x100;
if(vga->crt[0x07] & 0x20)
x |= 0x200;
if(vga->crt[0x5E] & 0x01)
x |= 0x400;
x += 2;
if(interlace)
x *= 2;
printitem(name, "vt");
printreg(x);
Bprint(&stdout, "%6ud", x);
}
Ctlr s3generic = {
"s3", /* name */
snarf, /* snarf */
0, /* options */
init, /* init */
load, /* load */
dump, /* dump */
};