ref: 128ea44a89c7905612ad2fa5a61a9325ddfb5e1e
dir: /sys/src/cmd/aux/vga/vision864.c/
#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 */ };