ref: 2aec1f8a09ae0bc9fb269d84ef53defebc47eede
dir: /sys/src/cmd/aux/vga/ark2000pv.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include "pci.h"
#include "vga.h"
/*
* ARK Logic ARK2000PV GUI accelerator.
*/
static void
snarf(Vga* vga, Ctlr* ctlr)
{
int i;
/*
* Unlock access to the extended I/O registers.
*/
vgaxo(Seqx, 0x1D, 0x01);
for(i = 0x10; i < 0x2E; i++)
vga->sequencer[i] = vgaxi(Seqx, i);
for(i = 0x40; i < 0x47; i++)
vga->crt[i] = vgaxi(Crtx, i);
vga->crt[0x50] = vgaxi(Crtx, 0x50);
/*
* A hidey-hole for the coprocessor status register.
*/
vga->crt[0xFF] = inportb(0x3CB);
/*
* Memory size.
*/
switch((vga->sequencer[0x10]>>6) & 0x03){
case 0x00:
vga->vma = vga->vmz = 1*1024*1024;
break;
case 0x01:
vga->vma = vga->vmz = 2*1024*1024;
break;
case 0x02:
vga->vma = vga->vmz = 4*1024*1024;
break;
}
ctlr->flag |= Fsnarf;
}
static void
options(Vga*, Ctlr* ctlr)
{
ctlr->flag |= Hlinear|Hpclk2x8|Foptions;
}
static void
init(Vga* vga, Ctlr* ctlr)
{
Mode *mode;
ulong x;
mode = vga->mode;
vga->crt[0x46] = 0x00;
if(ctlr->flag & Upclk2x8){
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;
vga->crt[0x46] |= 0x04;
}
/*
* Overflow bits.
*/
vga->crt[0x40] = 0x00;
if(vga->crt[0x18] & 0x400)
vga->crt[0x40] |= 0x08;
if(vga->crt[0x10] & 0x400)
vga->crt[0x40] |= 0x10;
if(vga->crt[0x15] & 0x400)
vga->crt[0x40] |= 0x20;
if(vga->crt[0x12] & 0x400)
vga->crt[0x40] |= 0x40;
if(vga->crt[0x06] & 0x400)
vga->crt[0x40] |= 0x80;
vga->crt[0x41] = 0x00;
if(vga->crt[0x13] & 0x100)
vga->crt[0x41] |= 0x08;
if(vga->crt[0x04] & 0x100)
vga->crt[0x41] |= 0x10;
if(vga->crt[0x02] & 0x100)
vga->crt[0x41] |= 0x20;
if(vga->crt[0x01] & 0x100)
vga->crt[0x41] |= 0x40;
if(vga->crt[0x00] & 0x100)
vga->crt[0x41] |= 0x80;
/*
* Interlace.
*/
vga->crt[0x42] = 0x00;
vga->crt[0x44] = 0x00;
if(mode->interlace){
vga->crt[0x42] = vga->crt[0]/2;
vga->crt[0x44] |= 0x04;
}
vga->crt[0x45] = 0x00;
/*
* Memory configuration:
* enable linear|coprocessor|VESA modes;
* set aperture to 64Kb, 0xA0000;
* set aperture index 0.
* Bugs: 1024x768x1 doesn't work (aperture not set correctly?);
* hwgc doesn't work in 1-bit modes (hardware?).
*/
vga->sequencer[0x10] &= ~0x3F;
vga->sequencer[0x11] &= ~0x0F;
switch(mode->z){
case 1:
vga->sequencer[0x10] |= 0x03;
vga->sequencer[0x11] |= 0x01;
cflag = 1;
break;
case 8:
vga->sequencer[0x10] |= 0x0F;
vga->sequencer[0x11] |= 0x06;
if(vga->linear && (ctlr->flag & Hlinear) && vga->vmz)
ctlr->flag |= Ulinear;
break;
default:
error("depth %d not supported\n", mode->z);
}
vga->sequencer[0x12] &= ~0x03;
vga->sequencer[0x13] = 0x0A;
vga->sequencer[0x14] = 0x00;
vga->sequencer[0x15] = 0x00;
vga->sequencer[0x16] = 0x00;
/*
* Frame Buffer Pitch and FIFO control.
* Set the FIFO to 32 deep and refill trigger when
* 6 slots empty.
*/
vga->sequencer[0x17] = 0x00;
vga->sequencer[0x18] = 0x13;
if(mode->x <= 640)
vga->sequencer[0x17] = 0x00;
else if(mode->x <= 800)
vga->sequencer[0x17] |= 0x01;
else if(mode->x <= 1024)
vga->sequencer[0x17] |= 0x02;
else if(mode->x <= 1280)
vga->sequencer[0x17] |= 0x04;
else if(mode->x <= 1600)
vga->sequencer[0x17] |= 0x05;
else if(mode->x <= 2048)
vga->sequencer[0x17] |= 0x06;
/*
* Clock select.
*/
vga->misc &= ~0x0C;
vga->misc |= (vga->i[0] & 0x03)<<2;
vga->sequencer[0x11] &= ~0xC0;
vga->sequencer[0x11] |= (vga->i[0] & 0x0C)<<4;
vga->attribute[0x11] = 0x00; /* color map entry for black */
ctlr->flag |= Finit;
}
static void
load(Vga* vga, Ctlr* ctlr)
{
ulong l;
/*
* Ensure there are no glitches when selecting a new
* clock frequency.
* The sequencer toggle seems to matter on the Hercules
* Stingray 64/Video at 1280x1024x8. Without it the screen
* is fuzzy; a second load clears it up and there's no
* difference between the two register sets. A mystery.
*/
vgao(MiscW, vga->misc & ~0x0C);
vgaxo(Seqx, 0x11, vga->sequencer[0x11]);
vgao(MiscW, vga->misc);
if(vga->ramdac && strncmp(vga->ramdac->name, "w30c516", 7) == 0){
sequencer(vga, 1);
sleep(500);
sequencer(vga, 0);
}
if(ctlr->flag & Ulinear){
vga->sequencer[0x10] |= 0x10;
if(vga->vmz <= 1024*1024)
vga->sequencer[0x12] |= 0x01;
else if(vga->vmz <= 2*1024*1024)
vga->sequencer[0x12] |= 0x02;
else
vga->sequencer[0x12] |= 0x03;
l = vga->vmb>>16;
vga->sequencer[0x13] = l & 0xFF;
vga->sequencer[0x14] = (l>>8) & 0xFF;
}
vgaxo(Seqx, 0x10, vga->sequencer[0x10]);
vgaxo(Seqx, 0x12, vga->sequencer[0x12]);
vgaxo(Seqx, 0x13, vga->sequencer[0x13]);
vgaxo(Seqx, 0x14, vga->sequencer[0x14]);
vgaxo(Seqx, 0x15, vga->sequencer[0x15]);
vgaxo(Seqx, 0x16, vga->sequencer[0x16]);
vgaxo(Seqx, 0x17, vga->sequencer[0x17]);
vgaxo(Seqx, 0x18, vga->sequencer[0x18]);
vgaxo(Crtx, 0x40, vga->crt[0x40]);
vgaxo(Crtx, 0x41, vga->crt[0x41]);
vgaxo(Crtx, 0x42, vga->crt[0x42]);
vgaxo(Crtx, 0x44, vga->crt[0x44]);
vgaxo(Crtx, 0x45, vga->crt[0x45]);
vgaxo(Crtx, 0x46, vga->crt[0x46]);
ctlr->flag |= Fload;
}
static void
dump(Vga* vga, Ctlr* ctlr)
{
int i;
printitem(ctlr->name, "Seq10");
for(i = 0x10; i < 0x2E; i++)
printreg(vga->sequencer[i]);
printitem(ctlr->name, "Crt40");
for(i = 0x40; i < 0x47; i++)
printreg(vga->crt[i]);
printitem(ctlr->name, "Crt50");
printreg(vga->crt[0x50]);
printitem(ctlr->name, "Cop status");
printreg(vga->crt[0xFF]);
}
Ctlr ark2000pv = {
"ark2000pv", /* name */
snarf, /* snarf */
options, /* options */
init, /* init */
load, /* load */
dump, /* dump */
};
Ctlr ark2000pvhwgc = {
"ark2000pvhwgc", /* name */
0, /* snarf */
0, /* options */
0, /* init */
0, /* load */
0, /* dump */
};