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#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "../port/pci.h"
#include "../port/error.h"
#define Image IMAGE
#include <draw.h>
#include <memdraw.h>
#include <cursor.h>
#include "screen.h"
enum {
CursorON = 0xC8,
CursorOFF = 0x00,
};
static int
cyber938xpageset(VGAscr*, int page)
{
int opage;
opage = inb(0x3D8);
outb(0x3D8, page);
outb(0x3D9, page);
return opage;
}
static void
cyber938xpage(VGAscr* scr, int page)
{
lock(&scr->devlock);
cyber938xpageset(scr, page);
unlock(&scr->devlock);
}
static void
cyber938xlinear(VGAscr* scr, int, int)
{
Pcidev *p;
if(scr->vaddr)
return;
p = scr->pci;
if(p == nil)
return;
vgalinearpci(scr);
/*
* Heuristic to detect the MMIO space. We're flying blind
* here, with only the XFree86 source to guide us.
*/
if(p->mem[1].size == 0x20000 && (p->mem[1].bar & 1) == 0)
scr->mmio = vmap(p->mem[1].bar & ~0x0F, p->mem[1].size);
if(scr->apsize)
addvgaseg("cyber938xscreen", scr->paddr, scr->apsize);
if(scr->mmio)
addvgaseg("cyber938xmmio", p->mem[1].bar&~0x0F, 0x20000);
}
static void
cyber938xcurdisable(VGAscr*)
{
vgaxo(Crtx, 0x50, CursorOFF);
}
static void
cyber938xcurload(VGAscr* scr, Cursor* curs)
{
uchar *p;
int islinear, opage, y;
cyber938xcurdisable(scr);
opage = 0;
p = scr->vaddr;
islinear = vgaxi(Crtx, 0x21) & 0x20;
if(!islinear){
lock(&scr->devlock);
opage = cyber938xpageset(scr, scr->storage>>16);
p += (scr->storage & 0xFFFF);
}
else
p += scr->storage;
for(y = 0; y < 16; y++){
*p++ = curs->set[2*y]|curs->clr[2*y];
*p++ = curs->set[2*y + 1]|curs->clr[2*y + 1];
*p++ = 0x00;
*p++ = 0x00;
*p++ = curs->set[2*y];
*p++ = curs->set[2*y + 1];
*p++ = 0x00;
*p++ = 0x00;
}
memset(p, 0, (32-y)*8);
if(!islinear){
cyber938xpageset(scr, opage);
unlock(&scr->devlock);
}
/*
* Save the cursor hotpoint and enable the cursor.
*/
scr->offset = curs->offset;
vgaxo(Crtx, 0x50, CursorON);
}
static int
cyber938xcurmove(VGAscr* scr, Point p)
{
int x, xo, y, yo;
/*
* Mustn't position the cursor offscreen even partially,
* or it might disappear. Therefore, if x or y is -ve, adjust the
* cursor origins instead.
*/
if((x = p.x+scr->offset.x) < 0){
xo = -x;
x = 0;
}
else
xo = 0;
if((y = p.y+scr->offset.y) < 0){
yo = -y;
y = 0;
}
else
yo = 0;
/*
* Load the new values.
*/
vgaxo(Crtx, 0x46, xo);
vgaxo(Crtx, 0x47, yo);
vgaxo(Crtx, 0x40, x & 0xFF);
vgaxo(Crtx, 0x41, (x>>8) & 0xFF);
vgaxo(Crtx, 0x42, y & 0xFF);
vgaxo(Crtx, 0x43, (y>>8) & 0xFF);
return 0;
}
static void
cyber938xcurenable(VGAscr* scr)
{
int i;
ulong storage;
cyber938xcurdisable(scr);
/*
* Cursor colours.
*/
for(i = 0x48; i < 0x4C; i++)
vgaxo(Crtx, i, 0x00);
for(i = 0x4C; i < 0x50; i++)
vgaxo(Crtx, i, 0xFF);
/*
* Find a place for the cursor data in display memory.
*/
storage = ((scr->pitch*scr->height+1023)/1024);
vgaxo(Crtx, 0x44, storage & 0xFF);
vgaxo(Crtx, 0x45, (storage>>8) & 0xFF);
storage *= 1024;
scr->storage = storage;
/*
* Load, locate and enable the 32x32 cursor.
* (64x64 is bit 0, X11 format is bit 6 and cursor
* enable is bit 7). Bit 3 needs to be set on 9382
* chips otherwise even the white bits are black.
*/
cyber938xcurload(scr, &cursor);
cyber938xcurmove(scr, ZP);
vgaxo(Crtx, 0x50, CursorON);
}
VGAdev vgacyber938xdev = {
"cyber938x",
nil, /* enable */
nil, /* disable */
cyber938xpage, /* page */
cyber938xlinear, /* linear */
nil, /* drawinit */
};
VGAcur vgacyber938xcur = {
"cyber938xhwgc",
cyber938xcurenable, /* enable */
cyber938xcurdisable, /* disable */
cyber938xcurload, /* load */
cyber938xcurmove, /* move */
};
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