106 lines
2.0 KiB
C
106 lines
2.0 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <lib9.h>
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#include <bio.h>
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#include "pci.h"
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#include "vga.h"
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/*
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* S3 86C80[15] GUI Accelerator.
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*/
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static void
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snarf(Vga* vga, Ctlr* ctlr)
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{
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s3generic.snarf(vga, ctlr);
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}
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static void
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options(Vga* vga, Ctlr* ctlr)
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{
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ctlr->flag |= Henhanced|Foptions;
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}
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static void
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init(Vga* vga, Ctlr* ctlr)
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{
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uint32_t x;
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s3generic.init(vga, ctlr);
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vga->crt[0x3B] = vga->crt[0]-5;
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if(vga->mode->z > 8)
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error("depth %d not supported\n", vga->mode->z);
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/*
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* Display memory access control.
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* Calculation of the M-parameter (Crt54) is
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* memory-system and dot-clock dependent, the
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* values below are guesses from dumping
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* registers.
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*/
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vga->crt[0x60] = 0xFF;
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x = (vga->mode->x)/4;
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vga->crt[0x61] = 0x80|((x>>8) & 0x07);
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vga->crt[0x62] = (x & 0xFF);
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if(vga->mode->x <= 800)
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vga->crt[0x54] = 0x88;
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else if(vga->mode->x <= 1024)
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vga->crt[0x54] = 0xF8;
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else
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vga->crt[0x54] = 0x40;
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}
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static void
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load(Vga* vga, Ctlr* ctlr)
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{
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uint16_t advfunc;
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s3generic.load(vga, ctlr);
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vgaxo(Crtx, 0x60, vga->crt[0x60]);
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vgaxo(Crtx, 0x61, vga->crt[0x61]);
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vgaxo(Crtx, 0x62, vga->crt[0x62]);
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advfunc = 0x0000;
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if(ctlr->flag & Uenhanced){
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if(vga->mode->x == 1024 || vga->mode->x == 800)
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advfunc = 0x0057;
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else
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advfunc = 0x0053;
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}
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outportw(0x4AE8, advfunc);
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}
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static void
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dump(Vga* vga, Ctlr* ctlr)
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{
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s3generic.dump(vga, ctlr);
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}
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Ctlr s3801 = {
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"s3801", /* name */
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snarf, /* snarf */
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options, /* options */
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init, /* init */
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load, /* load */
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dump, /* dump */
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};
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Ctlr s3805 = {
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"s3805", /* name */
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snarf, /* snarf */
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options, /* options */
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init, /* init */
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load, /* load */
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dump, /* dump */
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};
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