ref: 9f76a7f6819ac04552b4fb6588156f3e4089d1d7
dir: /os/pc/vgas3.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"
enum {
PCIS3 = 0x5333, /* PCI VID */
SAVAGE3D = 0x8A20, /* PCI DID */
SAVAGE3DMV = 0x8A21,
SAVAGE4 = 0x8A22,
PROSAVAGEP = 0x8A25,
PROSAVAGEK = 0x8A26,
PROSAVAGE8 = 0x8D04,
SAVAGEMXMV = 0x8C10,
SAVAGEMX = 0x8C11,
SAVAGEIXMV = 0x8C12,
SAVAGEIX = 0x8C13,
SUPERSAVAGEIXC16 = 0x8C2E,
SAVAGE2000 = 0x9102,
VIRGE = 0x5631,
VIRGEGX2 = 0x8A10,
VIRGEDXGX = 0x8A01,
VIRGEVX = 0x883D,
VIRGEMX = 0x8C01,
VIRGEMXP = 0x8C03,
VIRTUALPC2004 = 0x8810,
AURORA64VPLUS = 0x8812,
};
static int
s3pageset(VGAscr* scr, int page)
{
uchar crt35, crt51;
int opage;
crt35 = vgaxi(Crtx, 0x35);
if(scr->gscreen->depth >= 8){
/*
* The S3 registers need to be unlocked for this.
* Let's hope they are already:
* vgaxo(Crtx, 0x38, 0x48);
* vgaxo(Crtx, 0x39, 0xA0);
*
* The page is 6 bits, the lower 4 bits in Crt35<3:0>,
* the upper 2 in Crt51<3:2>.
*/
vgaxo(Crtx, 0x35, page & 0x0F);
crt51 = vgaxi(Crtx, 0x51);
vgaxo(Crtx, 0x51, (crt51 & ~0x0C)|((page & 0x30)>>2));
opage = ((crt51 & 0x0C)<<2)|(crt35 & 0x0F);
}
else{
vgaxo(Crtx, 0x35, (page<<2) & 0x0C);
opage = (crt35>>2) & 0x03;
}
return opage;
}
static void
s3page(VGAscr* scr, int page)
{
int id;
id = (vgaxi(Crtx, 0x2D)<<8)|vgaxi(Crtx, 0x2E);
switch(id){
case VIRGEGX2:
break;
default:
lock(&scr->devlock);
s3pageset(scr, page);
unlock(&scr->devlock);
break;
}
}
static ulong
s3linear(VGAscr* scr, int* size, int* align)
{
char *mmioname;
ulong aperture, oaperture, mmiobase, mmiosize;
int i, id, j, osize, oapsize, wasupamem;
Pcidev *p;
osize = *size;
oaperture = scr->aperture;
oapsize = scr->apsize;
wasupamem = scr->isupamem;
mmiosize = 0;
mmiobase = 0;
mmioname = nil;
/*
* S3 makes cards other than display controllers, so
* look for the first S3 display controller (device class 3)
* and not one of their sound cards.
*/
p = nil;
while(p = pcimatch(p, PCIS3, 0)){
if(p->ccrb == 0x03)
break;
}
if(p != nil){
for(i=0; i<nelem(p->mem); i++){
if(p->mem[i].size >= *size
&& ((p->mem[i].bar & ~0x0F) & (*align-1)) == 0)
break;
}
if(i >= nelem(p->mem)){
print("vgas3: aperture not found\n");
return 0;
}
aperture = p->mem[i].bar & ~0x0F;
*size = p->mem[i].size;
id = (vgaxi(Crtx, 0x2D)<<8)|vgaxi(Crtx, 0x2E);
switch(id){ /* find mmio */
case SAVAGE4:
case PROSAVAGEP:
case PROSAVAGEK:
case PROSAVAGE8:
case SUPERSAVAGEIXC16:
/*
* We could assume that the MMIO registers
* will be in the screen segment and just use
* that, but PCI software is allowed to move them
* if it feels like it, so we look for an aperture of
* the right size; only the first 512k actually means
* anything. The S3 engineers overestimated how
* much space they would need in the first design.
*/
for(j=0; j<nelem(p->mem); j++){
if(i == j)
continue;
if(p->mem[j].size==512*1024 || p->mem[j].size==16*1024*1024){
mmiobase = p->mem[j].bar & ~0x0F;
mmiosize = 512*1024;
scr->mmio = (ulong*)upamalloc(mmiobase, mmiosize, 0);
mmioname = "savagemmio";
break;
}
}
if(mmiosize == 0){
print("savage4: mmio not found\n");
return 0;
}
}
}else
aperture = 0;
if(wasupamem)
upafree(oaperture, oapsize);
scr->isupamem = 0;
aperture = upamalloc(aperture, *size, *align);
if(aperture == 0){
if(wasupamem && upamalloc(oaperture, oapsize, 0))
scr->isupamem = 1;
}
else
scr->isupamem = 1;
if(oaperture && oaperture != aperture)
print("warning (BUG): redefinition of aperture does not change s3screen segment\n");
addvgaseg("s3screen", aperture, osize);
if(mmiosize)
addvgaseg(mmioname, mmiobase, mmiosize);
return aperture;
}
static void
s3vsyncactive(void)
{
/*
* Hardware cursor information is fetched from display memory
* during the horizontal blank active time. The 80x chips may hang
* if the cursor is turned on or off during this period.
*/
while((vgai(Status1) & 0x08) == 0)
;
}
static void
s3disable(VGAscr*)
{
uchar crt45;
/*
* Turn cursor off.
*/
crt45 = vgaxi(Crtx, 0x45) & 0xFE;
s3vsyncactive();
vgaxo(Crtx, 0x45, crt45);
}
static void
s3load(VGAscr* scr, Cursor* curs)
{
uchar *p;
int id, dolock, opage, x, y;
/*
* Disable the cursor and
* set the pointer to the two planes.
*/
s3disable(scr);
opage = 0;
p = KADDR(scr->aperture);
id = (vgaxi(Crtx, 0x2D)<<8)|vgaxi(Crtx, 0x2E);
switch(id){
case VIRTUALPC2004:
case VIRGE:
case VIRGEDXGX:
case VIRGEGX2:
case VIRGEVX:
case SAVAGEMXMV:
case SAVAGEIXMV:
case SAVAGE4:
case PROSAVAGEP:
case PROSAVAGEK:
case PROSAVAGE8:
case SUPERSAVAGEIXC16:
dolock = 0;
p += scr->storage;
break;
default:
dolock = 1;
lock(&scr->devlock);
opage = s3pageset(scr, scr->storage>>16);
p += (scr->storage & 0xFFFF);
break;
}
/*
* The cursor is set in Microsoft Windows format (the ViRGE/GX2 doesn't
* support the X11 format) which gives the following truth table:
* and xor colour
* 0 0 background colour
* 0 1 foreground colour
* 1 0 current screen pixel
* 1 1 NOT current screen pixel
* Put the cursor into the top-left of the 64x64 array.
*
* The cursor pattern in memory is interleaved words of
* AND and XOR patterns.
*/
for(y = 0; y < 64; y++){
for(x = 0; x < 64/8; x += 2){
if(x < 16/8 && y < 16){
*p++ = ~(curs->clr[2*y + x]|curs->set[2*y + x]);
*p++ = ~(curs->clr[2*y + x+1]|curs->set[2*y + x+1]);
*p++ = curs->set[2*y + x];
*p++ = curs->set[2*y + x+1];
}
else {
*p++ = 0xFF;
*p++ = 0xFF;
*p++ = 0x00;
*p++ = 0x00;
}
}
}
if(dolock){
s3pageset(scr, opage);
unlock(&scr->devlock);
}
/*
* Save the cursor hotpoint and enable the cursor.
*/
scr->offset = curs->offset;
s3vsyncactive();
vgaxo(Crtx, 0x45, 0x01);
}
static int
s3move(VGAscr* scr, Point p)
{
int x, xo, y, yo;
/*
* Mustn't position the cursor offscreen even partially,
* or it disappears. Therefore, if x or y is -ve, adjust the
* cursor offset instead.
* There seems to be a bug in that if the offset is 1, the
* cursor doesn't disappear off the left edge properly, so
* round it up to be even.
*/
if((x = p.x+scr->offset.x) < 0){
xo = -x;
xo = ((xo+1)/2)*2;
x = 0;
}
else
xo = 0;
if((y = p.y+scr->offset.y) < 0){
yo = -y;
y = 0;
}
else
yo = 0;
vgaxo(Crtx, 0x46, (x>>8) & 0x07);
vgaxo(Crtx, 0x47, x & 0xFF);
vgaxo(Crtx, 0x49, y & 0xFF);
vgaxo(Crtx, 0x4E, xo);
vgaxo(Crtx, 0x4F, yo);
vgaxo(Crtx, 0x48, (y>>8) & 0x07);
return 0;
}
static void
s3enable(VGAscr* scr)
{
int i;
ulong storage;
s3disable(scr);
/*
* Cursor colours. Set both the CR0[EF] and the colour
* stack in case we are using a 16-bit RAMDAC.
*/
vgaxo(Crtx, 0x0E, Pwhite);
vgaxo(Crtx, 0x0F, Pblack);
vgaxi(Crtx, 0x45);
for(i = 0; i < 3; i++)
vgaxo(Crtx, 0x4A, Pblack);
vgaxi(Crtx, 0x45);
for(i = 0; i < 3; i++)
vgaxo(Crtx, 0x4B, Pwhite);
/*
* Find a place for the cursor data in display memory.
* Must be on a 1024-byte boundary.
*/
storage = (scr->gscreen->width*BY2WD*scr->gscreen->r.max.y+1023)/1024;
vgaxo(Crtx, 0x4C, storage>>8);
vgaxo(Crtx, 0x4D, storage & 0xFF);
storage *= 1024;
scr->storage = storage;
/*
* Load, locate and enable the cursor
* in Microsoft Windows format.
*/
s3load(scr, &arrow);
s3move(scr, ZP);
vgaxo(Crtx, 0x55, vgaxi(Crtx, 0x55) & ~0x10);
s3vsyncactive();
vgaxo(Crtx, 0x45, 0x01);
}
/*
* The manual gives byte offsets, but we want ulong offsets, hence /4.
*/
enum {
SrcBase = 0xA4D4/4,
DstBase = 0xA4D8/4,
Stride = 0xA4E4/4,
FgrdData = 0xA4F4/4,
WidthHeight = 0xA504/4,
SrcXY = 0xA508/4,
DestXY = 0xA50C/4,
Command = 0xA500/4,
SubStat = 0x8504/4,
FifoStat = 0x850C/4,
};
/*
* Wait for writes to VGA memory via linear aperture to flush.
*/
enum {Maxloop = 1<<24};
struct {
ulong linear;
ulong fifo;
ulong idle;
ulong lineartimeout;
ulong fifotimeout;
ulong idletimeout;
} waitcount;
static void
waitforlinearfifo(VGAscr *scr)
{
ulong *mmio;
long x;
static ulong nwaitforlinearfifo;
ulong mask, val;
switch(scr->id){
default:
panic("unknown scr->id in s3 waitforlinearfifo");
case 0x8A01: /* ViRGE/[DG]X. XFree86 says no waiting necessary */
return;
case 0x5631: /* ViRGE */
case 0x883D: /* ViRGE/VX */
mask = 0x0F<<6;
val = 0x08<<6;
break;
case 0x8A10: /* ViRGE/GX2 */
mask = 0x1F<<6;
val = 0x10<<6;
break;
}
mmio = scr->mmio;
x = 0;
while((mmio[FifoStat]&mask) != val && x++ < Maxloop)
waitcount.linear++;
if(x >= Maxloop)
waitcount.lineartimeout++;
}
static void
waitforfifo(VGAscr *scr, int entries)
{
ulong *mmio;
long x;
static ulong nwaitforfifo;
mmio = scr->mmio;
x = 0;
while((mmio[SubStat]&0x1F00) < ((entries+2)<<8) && x++ < Maxloop)
waitcount.fifo++;
if(x >= Maxloop)
waitcount.fifotimeout++;
}
static void
waitforidle(VGAscr *scr)
{
ulong *mmio;
long x;
mmio = scr->mmio;
x = 0;
while((mmio[SubStat]&0x3F00) != 0x3000 && x++ < Maxloop)
waitcount.idle++;
if(x >= Maxloop)
waitcount.idletimeout++;
}
static int
hwscroll(VGAscr *scr, Rectangle r, Rectangle sr)
{
enum { Bitbltop = 0xCC }; /* copy source */
ulong *mmio;
ulong cmd, stride;
Point dp, sp;
int did, d;
d = scr->gscreen->depth;
did = (d-8)/8;
cmd = 0x00000020|(Bitbltop<<17)|(did<<2);
stride = Dx(scr->gscreen->r)*d/8;
if(r.min.x <= sr.min.x){
cmd |= 1<<25;
dp.x = r.min.x;
sp.x = sr.min.x;
}else{
dp.x = r.max.x-1;
sp.x = sr.max.x-1;
}
if(r.min.y <= sr.min.y){
cmd |= 1<<26;
dp.y = r.min.y;
sp.y = sr.min.y;
}else{
dp.y = r.max.y-1;
sp.y = sr.max.y-1;
}
mmio = scr->mmio;
waitforlinearfifo(scr);
waitforfifo(scr, 7);
mmio[SrcBase] = scr->aperture;
mmio[DstBase] = scr->aperture;
mmio[Stride] = (stride<<16)|stride;
mmio[WidthHeight] = ((Dx(r)-1)<<16)|Dy(r);
mmio[SrcXY] = (sp.x<<16)|sp.y;
mmio[DestXY] = (dp.x<<16)|dp.y;
mmio[Command] = cmd;
waitforidle(scr);
return 1;
}
static int
hwfill(VGAscr *scr, Rectangle r, ulong sval)
{
enum { Bitbltop = 0xCC }; /* copy source */
ulong *mmio;
ulong cmd, stride;
int did, d;
d = scr->gscreen->depth;
did = (d-8)/8;
cmd = 0x16000120|(Bitbltop<<17)|(did<<2);
stride = Dx(scr->gscreen->r)*d/8;
mmio = scr->mmio;
waitforlinearfifo(scr);
waitforfifo(scr, 8);
mmio[SrcBase] = scr->aperture;
mmio[DstBase] = scr->aperture;
mmio[DstBase] = scr->aperture;
mmio[Stride] = (stride<<16)|stride;
mmio[FgrdData] = sval;
mmio[WidthHeight] = ((Dx(r)-1)<<16)|Dy(r);
mmio[DestXY] = (r.min.x<<16)|r.min.y;
mmio[Command] = cmd;
waitforidle(scr);
return 1;
}
enum {
CursorSyncCtl = 0x0D, /* in Seqx */
VsyncHi = 0x80,
VsyncLo = 0x40,
HsyncHi = 0x20,
HsyncLo = 0x10,
};
static void
s3blank(VGAscr*, int blank)
{
uchar x;
x = vgaxi(Seqx, CursorSyncCtl);
x &= ~0xF0;
if(blank)
x |= VsyncLo | HsyncLo;
vgaxo(Seqx, CursorSyncCtl, x);
}
static void
s3drawinit(VGAscr *scr)
{
extern void savageinit(VGAscr*); /* vgasavage.c */
ulong id;
id = (vgaxi(Crtx, 0x2D)<<8)|vgaxi(Crtx, 0x2E);
scr->id = id;
/*
* It's highly likely that other ViRGEs will work without
* change to the driver, with the exception of the size of
* the linear aperture memory write FIFO. Since we don't
* know that size, I'm not turning them on. See waitforlinearfifo
* above.
*/
scr->blank = s3blank;
/* hwblank = 1; not known to work well */
switch(id){
case VIRGE:
case VIRGEVX:
case VIRGEGX2:
scr->mmio = (ulong*)(scr->aperture+0x1000000);
scr->fill = hwfill;
scr->scroll = hwscroll;
break;
case SAVAGEMXMV:
case SAVAGEIXMV:
scr->mmio = (ulong*)(scr->aperture+0x1000000);
savageinit(scr);
break;
case SUPERSAVAGEIXC16:
case SAVAGE4:
case PROSAVAGEP:
case PROSAVAGE8:
case PROSAVAGEK:
/* scr->mmio is set by s3linear */
savageinit(scr);
break;
}
}
VGAdev vgas3dev = {
"s3",
0,
0,
s3page,
s3linear,
s3drawinit,
};
VGAcur vgas3cur = {
"s3hwgc",
s3enable,
s3disable,
s3load,
s3move,
};