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