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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/error.h"
#define Image IMAGE
#include <draw.h>
#include <memdraw.h>
#include <cursor.h>
#include "screen.h"
static int
clgd542xpageset(VGAscr*, int page)
{
uchar gr09;
int opage;
if(vgaxi(Seqx, 0x07) & 0xF0)
page = 0;
gr09 = vgaxi(Grx, 0x09);
if(vgaxi(Grx, 0x0B) & 0x20){
vgaxo(Grx, 0x09, page<<2);
opage = gr09>>2;
}
else{
vgaxo(Grx, 0x09, page<<4);
opage = gr09>>4;
}
return opage;
}
static void
clgd542xpage(VGAscr* scr, int page)
{
lock(&scr->devlock);
clgd542xpageset(scr, page);
unlock(&scr->devlock);
}
static void
clgd542xlinear(VGAscr* scr, int, int)
{
vgalinearpci(scr);
}
static void
clgd542xdisable(VGAscr*)
{
uchar sr12;
sr12 = vgaxi(Seqx, 0x12);
vgaxo(Seqx, 0x12, sr12 & ~0x01);
}
static void
clgd542xenable(VGAscr* scr)
{
uchar sr12;
int mem, x;
/*
* Disable the cursor.
*/
sr12 = vgaxi(Seqx, 0x12);
vgaxo(Seqx, 0x12, sr12 & ~0x01);
/*
* Cursor colours.
* Can't call setcolor here as cursor is already locked.
*/
vgaxo(Seqx, 0x12, sr12|0x02);
vgao(PaddrW, 0x00);
vgao(Pdata, Pwhite);
vgao(Pdata, Pwhite);
vgao(Pdata, Pwhite);
vgao(PaddrW, 0x0F);
vgao(Pdata, Pblack);
vgao(Pdata, Pblack);
vgao(Pdata, Pblack);
vgaxo(Seqx, 0x12, sr12);
mem = 0;
switch(vgaxi(Crtx, 0x27) & ~0x03){
case 0x88: /* CL-GD5420 */
case 0x8C: /* CL-GD5422 */
case 0x94: /* CL-GD5424 */
case 0x80: /* CL-GD5425 */
case 0x90: /* CL-GD5426 */
case 0x98: /* CL-GD5427 */
case 0x9C: /* CL-GD5429 */
/*
* The BIOS leaves the memory size in Seq0A, bits 4 and 3.
* See Technical Reference Manual Appendix E1, Section 1.3.2.
*
* The storage area for the 64x64 cursors is the last 16Kb of
* display memory.
*/
mem = (vgaxi(Seqx, 0x0A)>>3) & 0x03;
break;
case 0xA0: /* CL-GD5430 */
case 0xA8: /* CL-GD5434 */
case 0xAC: /* CL-GD5436 */
case 0xB8: /* CL-GD5446 */
case 0x30: /* CL-GD7543 */
/*
* Attempt to intuit the memory size from the DRAM control
* register. Minimum is 512KB.
* If DRAM bank switching is on then there's double.
*/
x = vgaxi(Seqx, 0x0F);
mem = (x>>3) & 0x03;
if(x & 0x80)
mem++;
break;
case 0xBC: /* CL-GD5480 */
mem = 2; /* 1024 = 256<<2 */
x = vgaxi(Seqx, 0x0F);
if((x & 0x18) == 0x18){
mem <<= 1; /* 2048 = 256<<3 */
if(x & 0x80)
mem <<= 2; /* 2048 = 256<<4 */
}
if(vgaxi(Seqx, 0x17) & 0x80)
mem <<= 1;
break;
default: /* uh, ah dunno */
break;
}
scr->storage = ((256<<mem)-16)*1024;
/*
* Set the current cursor to index 0
* and turn the 64x64 cursor on.
*/
vgaxo(Seqx, 0x13, 0);
vgaxo(Seqx, 0x12, sr12|0x05);
}
static void
clgd542xinitcursor(VGAscr* scr, int xo, int yo, int index)
{
uchar *p, seq07;
uint p0, p1;
int opage, x, y;
/*
* Is linear addressing turned on? This will determine
* how we access the cursor storage.
*/
seq07 = vgaxi(Seqx, 0x07);
opage = 0;
p = scr->vaddr;
if(!(seq07 & 0xF0)){
lock(&scr->devlock);
opage = clgd542xpageset(scr, scr->storage>>16);
p += (scr->storage & 0xFFFF);
}
else
p += scr->storage;
p += index*1024;
for(y = yo; y < 16; y++){
p0 = scr->set[2*y];
p1 = scr->set[2*y+1];
if(xo){
p0 = (p0<<xo)|(p1>>(8-xo));
p1 <<= xo;
}
*p++ = p0;
*p++ = p1;
for(x = 16; x < 64; x += 8)
*p++ = 0x00;
p0 = scr->clr[2*y]|scr->set[2*y];
p1 = scr->clr[2*y+1]|scr->set[2*y+1];
if(xo){
p0 = (p0<<xo)|(p1>>(8-xo));
p1 <<= xo;
}
*p++ = p0;
*p++ = p1;
for(x = 16; x < 64; x += 8)
*p++ = 0x00;
}
while(y < 64+yo){
for(x = 0; x < 64; x += 8){
*p++ = 0x00;
*p++ = 0x00;
}
y++;
}
if(!(seq07 & 0xF0)){
clgd542xpageset(scr, opage);
unlock(&scr->devlock);
}
}
static void
clgd542xload(VGAscr* scr, Cursor* curs)
{
uchar sr12;
/*
* Disable the cursor.
*/
sr12 = vgaxi(Seqx, 0x12);
vgaxo(Seqx, 0x12, sr12 & ~0x01);
memmove(&scr->Cursor, curs, sizeof(Cursor));
clgd542xinitcursor(scr, 0, 0, 0);
/*
* Enable the cursor.
*/
vgaxo(Seqx, 0x13, 0);
vgaxo(Seqx, 0x12, sr12|0x05);
}
static int
clgd542xmove(VGAscr* scr, Point p)
{
int index, x, xo, y, yo;
index = 0;
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;
if(xo || yo){
clgd542xinitcursor(scr, xo, yo, 1);
index = 1;
}
vgaxo(Seqx, 0x13, index<<2);
vgaxo(Seqx, 0x10|((x & 0x07)<<5), (x>>3) & 0xFF);
vgaxo(Seqx, 0x11|((y & 0x07)<<5), (y>>3) & 0xFF);
return 0;
}
VGAdev vgaclgd542xdev = {
"clgd542x",
0,
0,
clgd542xpage,
clgd542xlinear,
};
VGAcur vgaclgd542xcur = {
"clgd542xhwgc",
clgd542xenable,
clgd542xdisable,
clgd542xload,
clgd542xmove,
};
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