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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"
typedef struct Cursor546x Cursor546x;
struct Cursor546x {
ushort x;
ushort y;
ushort preset;
ushort enable;
ushort addr;
};
enum {
PaletteState = 0xB0,
CursorMMIO = 0xE0,
};
static void
clgd546xlinear(VGAscr* scr, int, int)
{
vgalinearpci(scr);
}
static void
clgd546xenable(VGAscr* scr)
{
Pcidev *p;
if(scr->mmio)
return;
p = scr->pci;
if(p == nil)
return;
if(p->mem[1].bar & 1)
return;
scr->mmio = vmap(p->mem[1].bar&~0x0F, p->mem[1].size);
if(scr->mmio == nil)
return;
addvgaseg("clgd546xmmio", p->mem[1].bar&~0x0F, p->mem[1].size);
}
static void
clgd546xcurdisable(VGAscr* scr)
{
Cursor546x *cursor546x;
if(scr->mmio == nil)
return;
cursor546x = (Cursor546x*)((uchar*)scr->mmio+CursorMMIO);
cursor546x->enable = 0;
}
static void
clgd546xcurload(VGAscr* scr, Cursor* curs)
{
int c, i, m, y;
uchar *p;
Cursor546x *cursor546x;
if(scr->mmio == 0)
return;
cursor546x = (Cursor546x*)((uchar*)scr->mmio+CursorMMIO);
/*
* Disable the cursor then change only the bits
* that need it.
*/
cursor546x->enable = 0;
p = (uchar*)scr->vaddr + scr->storage;
for(y = 0; y < 16; y++){
c = curs->set[2*y];
m = 0;
for(i = 0; i < 8; i++){
if(c & (1<<(7-i)))
m |= 1<<i;
}
*p++ = m;
c = curs->set[2*y + 1];
m = 0;
for(i = 0; i < 8; i++){
if(c & (1<<(7-i)))
m |= 1<<i;
}
*p++ = m;
p += 6;
c = curs->set[2*y]|curs->clr[2*y];
m = 0;
for(i = 0; i < 8; i++){
if(c & (1<<(7-i)))
m |= 1<<i;
}
*p++ = m;
c = curs->set[2*y + 1]|curs->clr[2*y + 1];
m = 0;
for(i = 0; i < 8; i++){
if(c & (1<<(7-i)))
m |= 1<<i;
}
*p++ = m;
p += 6;
}
/*
* Save the cursor hotpoint and enable the cursor.
*/
scr->offset = curs->offset;
cursor546x->enable = 1;
}
static int
clgd546xcurmove(VGAscr* scr, Point p)
{
int x, xo, y, yo;
Cursor546x *cursor546x;
if(scr->mmio == 0)
return 1;
cursor546x = (Cursor546x*)((uchar*)scr->mmio+CursorMMIO);
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;
cursor546x->preset = (xo<<8)|yo;
cursor546x->x = x;
cursor546x->y = y;
return 0;
}
static void
clgd546xcurenable(VGAscr* scr)
{
uchar *p;
Cursor546x *cursor546x;
clgd546xenable(scr);
if(scr->mmio == 0)
return;
cursor546x = (Cursor546x*)((uchar*)scr->mmio+CursorMMIO);
/*
* Cursor colours.
* Can't call setcolor here as cursor is already locked.
*/
p = (uchar*)scr->mmio+PaletteState;
*p |= 0x08;
vgao(PaddrW, 0x00);
vgao(Pdata, Pwhite);
vgao(Pdata, Pwhite);
vgao(Pdata, Pwhite);
vgao(PaddrW, 0x0F);
vgao(Pdata, Pblack);
vgao(Pdata, Pblack);
vgao(Pdata, Pblack);
*p &= ~0x08;
/*
* Find a place for the cursor data in display memory.
* 2 cursor images might be needed, 1KB each so use the last
* 2KB of the framebuffer and initialise them to be
* transparent.
*/
scr->storage = ((vgaxi(Seqx, 0x14) & 0x07)+1)*1024*1022;
cursor546x->addr = (scr->storage>>10)<<2;
memset((uchar*)scr->vaddr + scr->storage, 0, 2*64*16);
/*
* Load, locate and enable the 64x64 cursor.
*/
clgd546xcurload(scr, &cursor);
clgd546xcurmove(scr, ZP);
cursor546x->enable = 1;
}
VGAdev vgaclgd546xdev = {
"clgd546x",
clgd546xenable,
nil,
nil,
clgd546xlinear,
};
VGAcur vgaclgd546xcur = {
"clgd546xhwgc",
clgd546xcurenable,
clgd546xcurdisable,
clgd546xcurload,
clgd546xcurmove,
};
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