ref: b9745c60a1bf2a3876e411d38c67a0980d70e3a3
dir: /sys/src/cmd/aux/vga/vision964.c/
#include <u.h> #include <libc.h> #include <bio.h> #include "pci.h" #include "vga.h" /* * S3 Vision964 GUI Accelerator. */ static void snarf(Vga* vga, Ctlr* ctlr) { s3generic.snarf(vga, ctlr); vga->crt[0x22] = vgaxi(Crtx, 0x22); vga->crt[0x24] = vgaxi(Crtx, 0x24); vga->crt[0x26] = vgaxi(Crtx, 0x26); } 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; if(dbattr(vga->attr, "sam512") == 0) vga->crt[0x58] |= 0x40; /* set 256 word SAM, always works */ vga->crt[0x65] = 0x00; vga->crt[0x66] &= ~0x07; vga->crt[0x6D] = 0x00; if(ctlr->flag & Uenhanced){ if(vga->ramdac && (vga->ramdac->flag & Hsid32)) sid = 32; else sid = 64; if(vga->ramdac && (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[0x65] |= 0x02; if(vga->ramdac && (vga->ramdac->flag & Hsid32)) vga->crt[0x66] |= 0x10; /* * Some heuristics (what part of aux/vga isn't?) * to prevent some of the right border appearing * on the left edge of the screen. */ if(dbattr(vga->attr, "vclkphs")) vga->crt[0x67] |= 0x01; if(val = dbattr(vga->attr, "delaybl")) vga->crt[0x6D] |= strtoul(val, 0, 0) & 0x07; else if(mode->x > 1024) vga->crt[0x6D] |= 0x01; else vga->crt[0x6D] |= 0x03; 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, 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, "Crt22"); printreg(vga->crt[0x22]); printitem(ctlr->name, "Crt24"); printreg(vga->crt[0x24]); printitem(ctlr->name, "Crt26"); printreg(vga->crt[0x26]); } Ctlr vision964 = { "vision964", /* name */ snarf, /* snarf */ options, /* options */ init, /* init */ load, /* load */ dump, /* dump */ };