ref: 9ced712a2ad70557a8ceb89ff3b969b92c85f68c
dir: /sys/src/cmd/aux/vga/mga2164w.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include "pci.h"
#include "vga.h"
/*
* Matrox Millenium and Matrox Millenium II.
* Matrox MGA-2064W, MGA-2164W 3D graphics accelerators
* Texas Instruments Tvp3026 RAMDAC.
*/
enum {
Meg = 1024*1024,
/* pci chip manufacturer */
MATROX = 0x102B,
/* pci chip device ids */
MGA2064 = 0x0519,
MGA2164 = 0x051B,
MGA2164AGP = 0x051F,
/* i/o ports */
Crtcext = 0x03DE, /* CRTC Extensions */
/* config space offsets */
Devctrl = 0x04, /* Device Control */
Option = 0x40, /* Option */
/* control aperture offsets */
RAMDAC = 0x3C00, /* RAMDAC registers */
CACHEFLUSH = 0x1FFF,
};
typedef struct {
Pcidev* pci;
int devid;
uchar* membase1;
uchar* membase2;
ulong devctrl;
ulong option;
uchar crtcext[6];
uchar tvp[64];
uchar pclk[3];
uchar mclk[3];
uchar lclk[3];
} Mga;
static uchar
_tvp3026i(Vga* vga, Ctlr* ctlr, uchar reg)
{
Mga *mga;
if(reg >= 0x10)
error("%s: tvp3026io: direct reg 0x%uX out of range\n", ctlr->name, reg);
if(vga->private == nil)
error("%s: tvp3026io: no *mga\n", ctlr->name);
mga = vga->private;
return *(mga->membase1+RAMDAC+reg);
}
static void
_tvp3026o(Vga* vga, Ctlr* ctlr, uchar reg, uchar data)
{
Mga *mga;
if(reg >= 0x10)
error("%s: tvp3026io: direct reg 0x%uX out of range\n", ctlr->name, reg);
if(vga->private == nil)
error("%s: tvp3026io: no *mga\n", ctlr->name);
mga = vga->private;
*(mga->membase1+RAMDAC+reg) = data;
}
static uchar
_tvp3026xi(Vga* vga, Ctlr* ctlr, uchar index)
{
if(index >= 0x40)
error("%s: tvp3026xi: reg 0x%uX out of range\n", ctlr->name, index);
_tvp3026o(vga, ctlr, 0x00, index);
return _tvp3026i(vga, ctlr, 0x0A);
}
void
_tvp3026xo(Vga* vga, Ctlr* ctlr, uchar index, uchar data)
{
if(index >= 0x40)
error("%s: tvp3026xo: reg 0x%uX out of range\n", ctlr->name, index);
_tvp3026o(vga, ctlr, 0x00, index);
_tvp3026o(vga, ctlr, 0x0A, data);
}
static uchar
crtcexti(uchar index)
{
uchar data;
outportb(Crtcext, index);
data = inportb(Crtcext+1);
return data;
}
static void
crtcexto(uchar index, uchar data)
{
outportb(Crtcext, index);
outportb(Crtcext+1, data);
}
static void
mapmga(Vga* vga, Ctlr* ctlr)
{
uchar *m;
Mga *mga;
if(vga->private == nil)
error("%s: tvp3026io: no *mga\n", ctlr->name);
mga = vga->private;
vgactlpci(vga->pci);
vgactlw("type", "mga2164w");
m = segattach(0, "mga2164wmmio", 0, 16*1024);
if(m == (void*)-1)
error("%s: can't attach mga2164wmmio segment\n", ctlr->name);
mga->membase1 = m;
m = segattach(0, "mga2164wscreen", 0, (mga->devid==MGA2064? 8 : 16)*Meg);
if(m ==(void*)-1)
error("%s: can't attach mga2164wscreen segment\n", ctlr->name);
mga->membase2 = m;
}
static void
clockcalc(Vga* vga, Ctlr* ctlr, int bpp)
{
ulong m, n, p, q;
double z, fdiff, fmindiff, fvco, fgoal;
Mga *mga;
USED(ctlr);
mga = vga->private;
/*
* Look for values of n, d and p that give
* the least error for
* Fvco = 8*RefFreq*(65-m)/(65-n)
* Fpll = Fvco/2**p
* N and m are 6 bits, p is 2 bits. Constraints:
* 110MHz <= Fvco <= 250MHz
* 40 <= n <= 62
* 1 <= m <= 62
* 0 <= p <= 3
*/
fgoal = (double)vga->f[0];
fmindiff = fgoal;
vga->m[0] = 0x15;
vga->n[0] = 0x18;
vga->p[0] = 3;
for(m = 62; m > 0; m--){
for(n = 62; n >= 40; n--){
fvco = 8.*((double)RefFreq)*(65.-m)/(65.-n);
if(fvco < 110e6 || fvco > 250e6)
continue;
for(p = 0; p < 4; p++){
fdiff = fgoal - fvco/(1<<p);
if(fdiff < 0)
fdiff = -fdiff;
if(fdiff < fmindiff){
fmindiff = fdiff;
vga->m[0] = m;
vga->n[0] = n;
vga->p[0] = p;
}
}
}
}
mga->pclk[0] = 0xC0 | (vga->n[0] & 0x3f);
mga->pclk[1] = (vga->m[0] & 0x3f);
mga->pclk[2] = 0xB0 | (vga->p[0] & 0x03);
/*
* Now the loop clock:
* m is fixed;
* calculate n;
* set z to the lower bound (110MHz) and calculate p and q.
*/
vga->m[1] = 61;
n = 65 - 4*(64/(vga->vmz==2*Meg? bpp*2 : bpp));
fvco = (8*RefFreq*(65-vga->m[0]))/(65-vga->n[0]);
vga->f[1] = fvco/(1<<vga->p[0]);
z = 110e6*(65.-n)/(4.*vga->f[1]);
if(z <= 16){
for(p = 0; p < 4; p++){
if(1<<(p+1) > z)
break;
}
q = 0;
}
else{
p = 3;
q = (z - 16)/16 + 1;
}
vga->n[1] = n;
vga->p[1] = p;
vga->q[1] = q;
mga->lclk[0] = 0xC0 | (vga->n[1] & 0x3f);
mga->lclk[1] = (vga->m[1] & 0x3f);
mga->lclk[2] = 0xF0 | (vga->p[1] & 0x03);
mga->tvp[0x39] = 0x38 | q;
}
static void
snarf(Vga* vga, Ctlr* ctlr)
{
int i, k, n;
uchar *p, x[8];
Pcidev *pci;
Mga *mga;
if(vga->private == nil) {
pci = pcimatch(nil, MATROX, MGA2164AGP);
if(pci == nil)
pci = pcimatch(nil, MATROX, MGA2164);
if(pci == nil)
pci = pcimatch(nil, MATROX, MGA2064);
if(pci == nil)
error("%s: no Pcidev with Vid=0x102B, Did=0x051[9BF] or 0x521\n", ctlr->name);
vga->private = alloc(sizeof(Mga));
mga = (Mga*)vga->private;
mga->devid = pci->did;
mga->pci = pci;
mapmga(vga, ctlr);
}
else {
mga = (Mga*)vga->private;
pci = mga->pci;
}
for(i = 0; i < 0x06; i++)
mga->crtcext[i] = crtcexti(i);
mga->devctrl = pcicfgr32(pci, Devctrl);
mga->option = pcicfgr32(pci, Option);
for(i = 0; i < 64; i++)
mga->tvp[i] = _tvp3026xi(vga, ctlr, i);
for(i = 0; i < 3; i++){
_tvp3026xo(vga, ctlr, 0x2C, (i<<4)|(i<<2)|i);
mga->pclk[i] = _tvp3026xi(vga, ctlr, 0x2D);
}
for(i = 0; i < 3; i++){
_tvp3026xo(vga, ctlr, 0x2C, (i<<4)|(i<<2)|i);
mga->mclk[i] = _tvp3026xi(vga, ctlr, 0x2E);
}
for(i = 0; i < 3; i++){
_tvp3026xo(vga, ctlr, 0x2C, (i<<4)|(i<<2)|i);
mga->lclk[i] = _tvp3026xi(vga, ctlr, 0x2F);
}
/* find out how much memory is here, some multiple of 2Meg */
crtcexto(3, mga->crtcext[3] | 0x80); /* mga mode */
p = mga->membase2;
n = (mga->devid==MGA2064? 4 : 8);
for(i = 0; i < n; i++) {
k = (2*i+1)*Meg;
p[k] = 0;
p[k] = i+1;
*(mga->membase1+CACHEFLUSH) = 0;
x[i] = p[k];
trace("x[%d]=%d\n", i, x[i]);
}
for(i = 1; i < n; i++)
if(x[i] != i+1)
break;
vga->vmz = 2*i*Meg;
trace("probe found %d megabytes\n", 2*i);
crtcexto(3, mga->crtcext[3]); /* restore mga mode */
ctlr->flag |= Fsnarf;
}
static void
options(Vga* vga, Ctlr* ctlr)
{
if(vga->virtx & 127)
vga->virtx = (vga->virtx+127)&~127;
ctlr->flag |= Foptions;
}
static void
init(Vga* vga, Ctlr* ctlr)
{
Mode *mode;
Ctlr *c;
Mga *mga;
int scale, offset, pixbuswidth;
mga = vga->private;
mode = vga->mode;
ctlr->flag |= Ulinear;
pixbuswidth = (vga->vmz == 2*Meg) ? 32 : 64;
trace("pixbuswidth=%d\n", pixbuswidth);
if(vga->mode->z > 8)
error("depth %d not supported\n", vga->mode->z);
if(vga->f[0] == 0)
vga->f[0] = vga->mode->frequency;
/* supposed to let tvp reg 1D control sync polarity */
vga->misc |= 0xC8;
/*
* In power graphics mode, supposed to use
* hblkend = htotal+4
* hblkstr = hdispend
*/
if((vga->crt[0x00] & 0x0F) == 0x0F) {
vga->crt[0x00]++;
mode->ht += 8;
}
vga->crt[0x02] = vga->crt[0x01];
vga->crt[0x03] = (((mode->ht>>3)-1) & 0x1F) | 0x80;
vga->crt[0x05] = ((((mode->ht>>3)-1) & 0x20) << 2)
| ((mode->ehs>>3) & 0x1F);
offset = (vga->virtx*mode->z) >> ((pixbuswidth==32)? 6 : 7);
vga->crt[0x13] = offset;
vga->crt[0x14] = 0;
vga->crt[0x17] = 0xE3;
mga->crtcext[0] = (offset & 0x300) >> 4;
mga->crtcext[1] = ((((mode->ht>>3)-5) & 0x100) >> 8)
| ((((mode->x>>3)-1) & 0x100) >> 7)
| (((mode->shs>>3) & 0x100) >> 6) /* why not (shs>>3)-1 ? */
| (((mode->ht>>3)-1) & 0x40);
mga->crtcext[2] = (((mode->vt-2) & 0xC00) >> 10)
| (((mode->y-1) & 0x400) >> 8)
| ((mode->vrs & 0xC00) >> 7)
| ((mode->vrs & 0xC00) >> 5);
scale = mode->z == 8 ? 1 : (mode->z == 16? 2 : 4);
if(pixbuswidth == 32)
scale *= 2;
scale--;
mga->crtcext[3] = scale | 0x80;
if(vga->vmz >= 8*Meg)
mga->crtcext[3] |= 0x10;
else if(vga->vmz == 2*Meg)
mga->crtcext[3] |= 0x08;
mga->crtcext[4] = 0;
mga->crtcext[5] = 0;
mga->tvp[0x0F] = (mode->z == 8) ? 0x06 : 0x07;
mga->tvp[0x18] = (mode->z == 8) ? 0x80 :
(mode->z == 16) ? 0x05 : 0x06;
mga->tvp[0x19] = (mode->z == 8) ? 0x4C :
(mode->z == 16) ? 0x54 : 0x5C;
if(pixbuswidth == 32)
mga->tvp[0x19]--;
mga->tvp[0x1A] = (mode->z == 8) ? 0x25 :
(mode->z == 16) ? 0x15 : 0x05;
mga->tvp[0x1C] = 0;
mga->tvp[0x1D] = (mode->y < 768) ? 0x00 : 0x03;
mga->tvp[0x1E] = (mode->z == 8) ? 0x04 : 0x24; /* six bit mode */
mga->tvp[0x2A] = 0;
mga->tvp[0x2B] = 0x1E;
mga->tvp[0x30] = 0xFF;
mga->tvp[0x31] = 0xFF;
mga->tvp[0x32] = 0xFF;
mga->tvp[0x33] = 0xFF;
mga->tvp[0x34] = 0xFF;
mga->tvp[0x35] = 0xFF;
mga->tvp[0x36] = 0xFF;
mga->tvp[0x37] = 0xFF;
mga->tvp[0x38] = 0;
mga->tvp[0x39] = 0;
mga->tvp[0x3A] = 0;
mga->tvp[0x06] = 0;
// From: "Bruce G. Stewart" <bruce.g.stewart@worldnet.att.net>
// 05-Jul-00 - Fix vertical blanking setup
// This should probably be corrected in vga.c too.
{
// Start vertical blanking after the last displayed line
// End vertical blanking after the total line count
int svb = mode->y;
int evb = mode->vt;
// A field is 1/2 of the lines in interlaced mode
if(mode->interlace == 'v'){
svb /= 2;
evb /= 2;
}
--svb;
--evb; // line counter counts from 0
vga->crt[0x15] = svb;
vga->crt[0x07] = (vga->crt[0x07] & ~0x08) | ((svb & 0x100)>>5);
vga->crt[0x09] = (vga->crt[0x09] & ~0x20) | ((svb & 0x200)>>4);
// MGA specific: bits 10 and 11
mga->crtcext[0x02] &= ~0x18;
mga->crtcext[0x02] |= ((svb & 0xC00)>>7);
vga->crt[0x16] = evb;
}
clockcalc(vga, ctlr, mode->z);
mga->option = mga->option & ~0x3000;
if(vga->vmz > 2*Meg)
mga->option |= 0x1000;
/* disable vga load (want to do fields in different order) */
for(c = vga->link; c; c = c->link)
if(strncmp(c->name, "vga", 3) == 0)
c->load = nil;
ctlr->flag |= Finit;
}
static void
load(Vga* vga, Ctlr* ctlr)
{
int i;
Mga *mga;
Pcidev* pci;
mga = vga->private;
pci = mga->pci;
trace("loading crtcext0-5\n");
/* turn on mga mode, set other crt high bits */
for(i = 0; i < 6; i++)
crtcexto(i, mga->crtcext[i]);
trace("setting memory mode\n");
/* set memory mode */
pcicfgw32(pci, Option, mga->option);
/* clocksource: pixel clock PLL */
_tvp3026xo(vga, ctlr, 0x1A, mga->tvp[0x1A]);
/* disable pclk and lclk */
_tvp3026xo(vga, ctlr, 0x2C, 0x2A);
_tvp3026xo(vga, ctlr, 0x2F, 0);
_tvp3026xo(vga, ctlr, 0x2D, 0);
trace("loading vga registers\n");
/* vga misc, seq, and registers */
vgao(MiscW, vga->misc);
for(i = 2; i < 0x05; i++)
vgaxo(Seqx, i, vga->sequencer[i]);
vgaxo(Crtx, 0x11, vga->crt[0x11] & ~0x80);
for(i = 0; i < 0x19; i++)
vgaxo(Crtx, i, vga->crt[i]);
/* apparently AGP needs this to restore start address */
crtcexto(0, mga->crtcext[0]);
trace("programming pclk\n");
/* set up pclk */
_tvp3026xo(vga, ctlr, 0x2C, 0);
for(i = 0; i < 3; i++)
_tvp3026xo(vga, ctlr, 0x2D, mga->pclk[i]);
while(!(_tvp3026xi(vga, ctlr, 0x2D) & 0x40))
;
trace("programming lclk\n");
/* set up lclk */
_tvp3026xo(vga, ctlr, 0x39, mga->tvp[0x39]);
_tvp3026xo(vga, ctlr, 0x2C, 0);
for(i = 0; i < 3; i++)
_tvp3026xo(vga, ctlr, 0x2F, mga->lclk[i]);
while(!(_tvp3026xi(vga, ctlr, 0x2F) & 0x40))
;
trace("loading tvp registers\n");
/* tvp registers, order matters */
_tvp3026xo(vga, ctlr, 0x0F, mga->tvp[0x0F]);
_tvp3026xo(vga, ctlr, 0x18, mga->tvp[0x18]);
_tvp3026xo(vga, ctlr, 0x19, mga->tvp[0x19]);
_tvp3026xo(vga, ctlr, 0x1A, mga->tvp[0x1A]);
_tvp3026xo(vga, ctlr, 0x1C, mga->tvp[0x1C]);
_tvp3026xo(vga, ctlr, 0x1D, mga->tvp[0x1D]);
_tvp3026xo(vga, ctlr, 0x1E, mga->tvp[0x1E]);
_tvp3026xo(vga, ctlr, 0x2A, mga->tvp[0x2A]);
_tvp3026xo(vga, ctlr, 0x2B, mga->tvp[0x2B]);
_tvp3026xo(vga, ctlr, 0x30, mga->tvp[0x30]);
_tvp3026xo(vga, ctlr, 0x31, mga->tvp[0x31]);
_tvp3026xo(vga, ctlr, 0x32, mga->tvp[0x32]);
_tvp3026xo(vga, ctlr, 0x33, mga->tvp[0x33]);
_tvp3026xo(vga, ctlr, 0x34, mga->tvp[0x34]);
_tvp3026xo(vga, ctlr, 0x35, mga->tvp[0x35]);
_tvp3026xo(vga, ctlr, 0x36, mga->tvp[0x36]);
_tvp3026xo(vga, ctlr, 0x37, mga->tvp[0x37]);
_tvp3026xo(vga, ctlr, 0x38, mga->tvp[0x38]);
_tvp3026xo(vga, ctlr, 0x39, mga->tvp[0x39]);
_tvp3026xo(vga, ctlr, 0x3A, mga->tvp[0x3A]);
_tvp3026xo(vga, ctlr, 0x06, mga->tvp[0x06]);
trace("done mga load\n");
ctlr->flag |= Fload;
}
static void
dump(Vga* vga, Ctlr* ctlr)
{
int i;
char *name;
Mga *mga;
name = ctlr->name;
mga = vga->private;
printitem(name, "Devctrl");
printreg(mga->devctrl);
printitem(name, "Option");
printreg(mga->option);
printitem(name, "Crtcext");
for(i = 0; i < 0x06; i++)
printreg(mga->crtcext[i]);
printitem(name, "TVP");
for(i = 0; i < 64; i++)
printreg(mga->tvp[i]);
printitem(name, "PCLK");
for(i = 0; i < 3; i++)
printreg(mga->pclk[i]);
printitem(name, "MCLK");
for(i = 0; i < 3; i++)
printreg(mga->mclk[i]);
printitem(name, "LCLK");
for(i = 0; i < 3; i++)
printreg(mga->lclk[i]);
}
Ctlr mga2164w = {
"mga2164w", /* name */
snarf, /* snarf */
options, /* options */
init, /* init */
load, /* load */
dump, /* dump */
};
Ctlr mga2164whwgc = {
"mga2164whwgc", /* name */
0, /* snarf */
0, /* options */
0, /* init */
0, /* load */
dump, /* dump */
};