133 lines
2.3 KiB
C
133 lines
2.3 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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* Sierra SC1502[56] HiCOLOR-24 Palette.
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*/
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static void
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pixmask(void)
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{
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inportb(PaddrW);
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}
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static void
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commandrw(void)
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{
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int i;
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pixmask();
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for(i = 0; i < 4; i++)
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inportb(Pixmask);
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}
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static uint8_t
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commandr(void)
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{
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uint8_t command;
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commandrw();
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command = inportb(Pixmask);
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pixmask();
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return command;
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}
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static void
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commandw(uint8_t command)
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{
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commandrw();
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outportb(Pixmask, command);
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pixmask();
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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 |= 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 pclk;
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char *p;
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/*
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* Part comes in -125, -110, -80, and -66MHz speed-grades.
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* Work out the part speed-grade from name. Name can have,
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* e.g. '-110' on the end for 100MHz part.
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*/
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pclk = 66000000;
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if(p = strrchr(ctlr->name, '-'))
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pclk = strtoul(p+1, 0, 0) * 1000000;
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/*
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* If we don't already have a desired pclk,
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* take it from the mode.
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* Check it's within range.
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*/
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if(vga->f[0] == 0)
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vga->f[0] = vga->mode->frequency;
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if(vga->f[0] > pclk)
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error("%s: invalid pclk - %ld\n", ctlr->name, vga->f[0]);
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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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uint8_t aux, command;
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aux = 0x00;
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/*
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if(vga->mode->z == 8)
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aux = 0x01;
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*/
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commandrw();
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command = inportb(Pixmask);
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outportb(Pixmask, command|0x18);
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outportb(PaddrR, 0x08);
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outportb(PaddrW, aux);
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commandw(command);
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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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int i;
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uint8_t command;
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printitem(ctlr->name, "command");
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command = commandr();
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printreg(command);
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printitem(ctlr->name, "index08");
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commandw(command|0x10);
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for(i = 0x08; i < 0x11; i++){
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outportb(PaddrR, i);
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printreg(inportb(PaddrW));
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}
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commandw(command);
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}
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Ctlr sc15025 = {
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"sc15025", /* name */
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0, /* 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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