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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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