1999/1005/pc/vgas3.c (diff list | history)

1999/1005/sys/src/9/pc/vgas3.c:1,486 – 2000/0326/sys/src/9/pc/vgas3.c:1,507 (short | long | prev | next)
1994/0803		#include "u.h" #include "../port/lib.h" #include "mem.h" #include "dat.h" #include "fns.h"
1997/1101		#include "io.h"
1994/0803		#include "../port/error.h"
1997/1101		#define Image IMAGE #include <draw.h> #include <memdraw.h>
1999/0119		#include <cursor.h>
1994/0803		#include "screen.h"
1997/1101		static int s3pageset(VGAscr* scr, int page)
1994/0803		{
1997/1101		uchar crt35, crt51; int opage;
1994/0803
1997/1101		crt35 = vgaxi(Crtx, 0x35);
1999/1005		if(scr->gscreen->depth >= 8){
1994/0803		/* * 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);
1997/1101		crt51 = vgaxi(Crtx, 0x51); vgaxo(Crtx, 0x51, (crt51 & ~0x0C)|((page & 0x30)>>2)); opage = ((crt51 & 0x0C)<<2)|(crt35 & 0x0F);
1994/0803		}
1997/1101		else{
1994/0803		vgaxo(Crtx, 0x35, (page<<2) & 0x0C);
1997/1101		opage = (crt35>>2) & 0x03; } return opage;
1994/0803		} static void
1997/1101		s3page(VGAscr* scr, int page)
1994/0803		{
1998/0116		int id; id = (vgaxi(Crtx, 0x30)<<8)|vgaxi(Crtx, 0x2E); switch(id){ case 0xE110: /* ViRGE/GX2 */ break; default: lock(&scr->devlock); s3pageset(scr, page); unlock(&scr->devlock); break; }
1997/1101		} static ulong s3linear(VGAscr* scr, int* size, int* align) {
1999/1005		ulong aperture, oaperture; int osize, oapsize, wasupamem;
1997/1101		Pcidev *p;
1999/0716		Physseg seg;
1997/1101
1999/1005		osize = *size;
1997/1101		oaperture = scr->aperture; oapsize = scr->apsize; wasupamem = scr->isupamem; if(wasupamem) upafree(oaperture, oapsize); scr->isupamem = 0; if(p = pcimatch(nil, 0x5333, 0)){ aperture = p->mem[0].bar & ~0x0F; *size = p->mem[0].size; } else aperture = 0; aperture = upamalloc(aperture, *size, *align); if(aperture == 0){ if(wasupamem && upamalloc(oaperture, oapsize, 0)) scr->isupamem = 1; } else scr->isupamem = 1;
1999/1005		if(oaperture) print("warning (BUG): redefinition of aperture does not change s3screen segment\n");
1999/0716		memset(&seg, 0, sizeof(seg)); seg.attr = SG_PHYSICAL; seg.name = smalloc(NAMELEN); snprint(seg.name, NAMELEN, "s3screen"); seg.pa = aperture; seg.size = osize; addphysseg(&seg);
1999/1005
1997/1101		return aperture; } static void s3vsyncactive(void) {
1994/0803		/* * 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
1997/1101		s3disable(VGAscr*)
1994/0803		{ uchar crt45; /* * Turn cursor off. */ crt45 = vgaxi(Crtx, 0x45) & 0xFE;
1997/1101		s3vsyncactive();
1994/0803		vgaxo(Crtx, 0x45, crt45); } static void
1997/1101		s3enable(VGAscr* scr)
1997/0327		{
1999/1005		int i;
1997/1101		ulong storage;
1994/0803
1997/1101		s3disable(scr);
1994/0803		/* * Cursor colours. Set both the CR0[EF] and the colour * stack in case we are using a 16-bit RAMDAC. */
1995/0126		vgaxo(Crtx, 0x0E, Pwhite); vgaxo(Crtx, 0x0F, Pblack);
1994/0803		vgaxi(Crtx, 0x45);
1999/1005		for(i = 0; i < 3; i++) vgaxo(Crtx, 0x4A, Pblack); vgaxi(Crtx, 0x45); for(i = 0; i < 3; i++) vgaxo(Crtx, 0x4B, Pwhite);
1998/0116
1994/0803		/* * Find a place for the cursor data in display memory. * Must be on a 1024-byte boundary. */
1997/1101		storage = (scr->gscreen->width*BY2WD*scr->gscreen->r.max.y+1023)/1024;
1994/0803		vgaxo(Crtx, 0x4C, (storage>>8) & 0x0F); vgaxo(Crtx, 0x4D, storage & 0xFF); storage *= 1024;
1997/1101		scr->storage = storage;
1994/0803		/*
1998/0116		* Enable the cursor in Microsoft Windows format.
1994/0803		*/
1998/0116		vgaxo(Crtx, 0x55, vgaxi(Crtx, 0x55) & ~0x10);
1997/1101		s3vsyncactive();
1994/0803		vgaxo(Crtx, 0x45, 0x01); } static void
1997/1101		s3load(VGAscr* scr, Cursor* curs)
1994/0803		{
1994/0804		uchar *p;
1998/0116		int id, opage, x, y;
1994/0803		/*
1997/1101		* Disable the cursor and * set the pointer to the two planes.
1994/0809		*/
1997/1101		s3disable(scr);
1994/0809
1998/0116		opage = 0;
1997/1101		p = KADDR(scr->aperture);
1998/0116		id = (vgaxi(Crtx, 0x30)<<8)|vgaxi(Crtx, 0x2E); switch(id){
1994/0803
1999/0821		case 0xE131: /* ViRGE */
1999/1005		case 0xE18A: /* ViRGE/[DG]X */ case 0xE110: /* ViRGE/GX2 */ case 0xE13D: /* ViRGE/VX */
1998/0116		p += scr->storage; break; default: lock(&scr->devlock); opage = s3pageset(scr, scr->storage>>16); p += (scr->storage & 0xFFFF); break; }
1994/0803		/*
1998/0116		* The cursor is set in Microsoft Windows format (the ViRGE/GX2 no * longer supports the X11 format) which gives the following truth table:
1994/0803		* and xor colour
1998/0116		* 0 0 background colour * 0 1 foreground colour * 1 0 current screen pixel * 1 1 NOT current screen pixel
1994/0803		* Put the cursor into the top-left of the 64x64 array.
1994/0809		* * The cursor pattern in memory is interleaved words of * AND and XOR patterns.
1994/0803		*/ for(y = 0; y < 64; y++){
1994/0804		for(x = 0; x < 64/8; x += 2){ if(x < 16/8 && y < 16){
1998/0116		*p++ = ~(curs->clr[2*y + x]|curs->set[2*y + x]); *p++ = ~(curs->clr[2*y + x+1]|curs->set[2*y + x+1]);
1997/1101		*p++ = curs->set[2*y + x]; *p++ = curs->set[2*y + x+1];
1994/0803		} else {
1998/0116		*p++ = 0xFF; *p++ = 0xFF;
1994/0804		*p++ = 0x00; *p++ = 0x00;
1994/0803		} } }
1998/0116		switch(id){
1999/0821		case 0xE131: /* ViRGE */
1999/1005		case 0xE18A: /* ViRGE/[DG]X */ case 0xE110: /* ViRGE/GX2 */ case 0xE13D: /* ViRGE/VX */
1998/0116		break; default: s3pageset(scr, opage); unlock(&scr->devlock); break; }
1997/1101
1994/0803		/*
1997/1101		* Save the cursor hotpoint and enable the cursor.
1994/0803		*/
1997/1101		scr->offset = curs->offset; s3vsyncactive();
1994/0803		vgaxo(Crtx, 0x45, 0x01); } static int
1997/1101		s3move(VGAscr* scr, Point p)
1994/0803		{
1994/0804		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.
1994/0809		* 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.
1994/0804		*/
1997/1101		if((x = p.x+scr->offset.x) < 0){
1994/0804		xo = -x; xo = ((xo+1)/2)*2; x = 0; } else xo = 0;
1997/1101		if((y = p.y+scr->offset.y) < 0){
1994/0804		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);
1994/0803		return 0; }
1999/1005		/* * 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; } 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 0xE131: /* ViRGE */ case 0xE13D: /* ViRGE/VX */ mask = 0x0F<<6; val = 0x08<<6; break; case 0xE110: /* ViRGE/GX2 */ mask = 0x1F<<6; val = 0x10<<6; break; } mmio = scr->mmio; x = 0; while((mmio[FifoStat]&mask) != val && x++ < Maxloop) waitcount.linear++; } 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++; } static void waitforidle(VGAscr *scr) { ulong *mmio; long x; mmio = scr->mmio; x = 0; while((mmio[SubStat]&0x3F00) != 0x3000 && x++ < Maxloop) waitcount.idle++; } 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; }
2000/0326		enum { CursorSyncCtl = 0x0D, /* in Seqx */ VsyncHi = 0x80, VsyncLo = 0x40, HsyncHi = 0x20, HsyncLo = 0x10, };
1999/1005		static void
2000/0326		s3blank(int blank) { uchar x; x = vgaxi(Seqx, CursorSyncCtl); x &= ~0xF0; if(blank) x |= VsyncLo | HsyncLo; vgaxo(Seqx, CursorSyncCtl, x); } static void
1999/1005		s3drawinit(VGAscr *scr) { ulong id; id = (vgaxi(Crtx, 0x30)<<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. */ switch(id){ case 0xE131: /* ViRGE */ case 0xE13D: /* ViRGE/VX */ case 0xE110: /* ViRGE/GX2 */ scr->mmio = (ulong*)(scr->aperture+0x1000000); scr->fill = hwfill; scr->scroll = hwscroll;
2000/0326		/* scr->blank = hwblank; */
1999/1005		} }
1997/1101		VGAdev vgas3dev = { "s3",
1995/0126		0,
1997/1101		0, s3page, s3linear,
1999/1005		s3drawinit,
1994/0803		};
1997/1101		VGAcur vgas3cur = { "s3hwgc",
1995/0126
1997/1101		s3enable, s3disable, s3load, s3move,
1995/0126		};