ref: e81c54ba2ecc673a4d5f8aed0e9b52841fe07b0d
dir: /os/pc/vgamga2164w.c/
#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"
/*
* Matrox Millennium and Matrox Millennium II.
* Matrox MGA-2064W, MGA-2164W 3D graphics accelerators.
* Texas Instruments Tvp3026 RAMDAC.
*/
enum {
/* pci chip manufacturer */
MATROX = 0x102B,
/* pci chip device ids */
MGA2064 = 0x0519,
MGA2164 = 0x051B,
MGA2164AGP = 0x051F
};
static Pcidev*
mgapcimatch(void)
{
Pcidev *p;
p = pcimatch(nil, MATROX, MGA2164AGP);
if(p == nil) {
p = pcimatch(nil, MATROX, MGA2164);
if(p == nil)
p = pcimatch(nil, MATROX, MGA2064);
}
return p;
}
static ulong
mga2164wlinear(VGAscr* scr, int* size, int* align)
{
ulong aperture, oaperture;
int oapsize, wasupamem;
Pcidev *p;
oaperture = scr->aperture;
oapsize = scr->apsize;
wasupamem = scr->isupamem;
if(p = mgapcimatch()){
aperture = p->mem[p->did==MGA2064? 1 : 0].bar & ~0x0F;
*size = (p->did==MGA2064? 8 :16)*1024*1024;
}
else
aperture = 0;
if(wasupamem) {
if(oaperture == aperture)
return oaperture;
upafree(oaperture, oapsize);
}
scr->isupamem = 0;
aperture = upamalloc(aperture, *size, *align);
if(aperture == 0){
if(wasupamem && upamalloc(oaperture, oapsize, 0)) {
aperture = oaperture;
scr->isupamem = 1;
}
else
scr->isupamem = 0;
}
else
scr->isupamem = 1;
return aperture;
}
static void
mga2164wenable(VGAscr* scr)
{
Pcidev *p;
int size, align, immio;
ulong aperture;
/*
* Only once, can't be disabled for now.
* scr->io holds the virtual address of
* the MMIO registers.
*/
if(scr->io)
return;
p = mgapcimatch();
if(p == nil)
return;
immio = p->did==MGA2064? 0 : 1;
scr->io = upamalloc(p->mem[immio].bar & ~0x0F, p->mem[immio].size, 0);
if(scr->io == 0)
return;
addvgaseg("mga2164wmmio", scr->io, p->mem[immio].size);
scr->io = (ulong)KADDR(scr->io);
/* need to map frame buffer here too, so vga can find memory size */
size = (p->did==MGA2064? 8 :16)*1024*1024;
align = 0;
aperture = mga2164wlinear(scr, &size, &align);
if(aperture) {
scr->aperture = aperture;
scr->apsize = size;
addvgaseg("mga2164wscreen", aperture, size);
}
}
enum {
Index = 0x00, /* Index */
Data = 0x0A, /* Data */
CaddrW = 0x04, /* Colour Write Address */
Cdata = 0x05, /* Colour Data */
Cctl = 0x09, /* Direct Cursor Control */
Cram = 0x0B, /* Cursor Ram Data */
Cxlsb = 0x0C, /* Cursor X LSB */
Cxmsb = 0x0D, /* Cursor X MSB */
Cylsb = 0x0E, /* Cursor Y LSB */
Cymsb = 0x0F, /* Cursor Y MSB */
Icctl = 0x06, /* Indirect Cursor Control */
};
static void
tvp3026disable(VGAscr* scr)
{
uchar *tvp3026;
if(scr->io == 0)
return;
tvp3026 = KADDR(scr->io+0x3C00);
/*
* Make sure cursor is off
* and direct control enabled.
*/
*(tvp3026+Index) = Icctl;
*(tvp3026+Data) = 0x90;
*(tvp3026+Cctl) = 0x00;
}
static void
tvp3026load(VGAscr* scr, Cursor* curs)
{
int x, y;
uchar *tvp3026;
if(scr->io == 0)
return;
tvp3026 = KADDR(scr->io+0x3C00);
/*
* Make sure cursor is off by initialising the cursor
* control to defaults.
* Write to the indirect control register to make sure
* direct register is enabled and upper 2 bits of cursor
* RAM address are 0.
* Put 0 in index register for lower 8 bits of cursor RAM address.
*/
tvp3026disable(scr);
*(tvp3026+Index) = 0;
/*
* Initialise the 64x64 cursor RAM array. There are 2 planes,
* p0 and p1. Data is written 8 pixels per byte, with p0 in the
* first 512 bytes of the array and p1 in the second.
* The cursor is set in 3-colour mode which gives the following
* truth table:
* p1 p0 colour
* 0 0 transparent
* 0 1 cursor colour 0
* 1 0 cursor colour 1
* 1 1 cursor colour 2
* Put the cursor into the top-left of the 64x64 array.
* The 0,0 cursor point is bottom-right, so positioning will
* have to take that into account.
*/
for(y = 0; y < 64; y++){
for(x = 0; x < 64/8; x++){
if(x < 16/8 && y < 16)
*(tvp3026+Cram) = curs->clr[x+y*2];
else
*(tvp3026+Cram) = 0x00;
}
}
for(y = 0; y < 64; y++){
for(x = 0; x < 64/8; x++){
if(x < 16/8 && y < 16)
*(tvp3026+Cram) = curs->set[x+y*2];
else
*(tvp3026+Cram) = 0x00;
}
}
/*
* Initialise the cursor hotpoint
* and enable the cursor in 3-colour mode.
*/
scr->offset.x = 64+curs->offset.x;
scr->offset.y = 64+curs->offset.y;
*(tvp3026+Cctl) = 0x01;
}
static int
tvp3026move(VGAscr* scr, Point p)
{
int x, y;
uchar *tvp3026;
if(scr->io == 0)
return 1;
tvp3026 = KADDR(scr->io+0x3C00);
x = p.x+scr->offset.x;
y = p.y+scr->offset.y;
*(tvp3026+Cxlsb) = x & 0xFF;
*(tvp3026+Cxmsb) = (x>>8) & 0x0F;
*(tvp3026+Cylsb) = y & 0xFF;
*(tvp3026+Cymsb) = (y>>8) & 0x0F;
return 0;
}
static void
tvp3026enable(VGAscr* scr)
{
int i;
uchar *tvp3026;
if(scr->io == 0)
return;
tvp3026 = KADDR(scr->io+0x3C00);
tvp3026disable(scr);
/*
* Overscan colour,
* cursor colour 1 (white),
* cursor colour 2, 3 (black).
*/
*(tvp3026+CaddrW) = 0x00;
for(i = 0; i < 6; i++)
*(tvp3026+Cdata) = Pwhite;
for(i = 0; i < 6; i++)
*(tvp3026+Cdata) = Pblack;
/*
* Load, locate and enable the
* 64x64 cursor in 3-colour mode.
*/
tvp3026load(scr, &arrow);
tvp3026move(scr, ZP);
*(tvp3026+Cctl) = 0x01;
}
VGAdev vgamga2164wdev = {
"mga2164w",
mga2164wenable, /* enable */
0, /* disable */
0, /* page */
mga2164wlinear, /* linear */
};
VGAcur vgamga2164wcur = {
"mga2164whwgc",
tvp3026enable,
tvp3026disable,
tvp3026load,
tvp3026move,
};