Import sources from 2011-03-30 iso image

1 files changed, 202 insertions, 0 deletions

diff --git a/sys/src/9/pc/vga3dfx.c b/sys/src/9/pc/vga3dfx.c
new file mode 100755
index 000000000..d7a052070
--- /dev/null
+++ b/sys/src/9/pc/vga3dfx.c
@@ -0,0 +1,202 @@
+#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"
+
+typedef struct Cursor3dfx Cursor3dfx;
+struct Cursor3dfx {
+	int	vidProcCfg;
+	int	hwCurPatAddr;
+	int	hwCurLoc;
+	int	hwCurC0;
+	int	hwCurC1;
+};
+
+enum {
+	dramInit0	= 0x18,
+	dramInit1	= 0x1C,
+
+	hwCur		= 0x5C,
+};
+
+static void
+tdfxenable(VGAscr* scr)
+{
+	Pcidev *p;
+	int i, *mmio;
+
+	if(scr->mmio)
+		return;
+	if(p = pcimatch(nil, 0x121A, 0)){
+		switch(p->did){
+		case 0x0003:		/* Banshee */
+		case 0x0005:		/* Avenger (a.k.a. Voodoo3) */
+			break;
+		default:
+			return;
+		}
+	}
+	else
+		return;
+	
+	scr->mmio = vmap(p->mem[0].bar&~0x0F, p->mem[0].size);
+	if(scr->mmio == nil)
+		return;
+	scr->pci = p;
+	
+	addvgaseg("3dfxmmio", p->mem[0].bar&~0x0F, p->mem[0].size);
+	vgalinearpci(scr);
+	if(scr->apsize)
+		addvgaseg("3dfxscreen", scr->paddr, scr->apsize);
+
+	/*
+	 * Find a place for the cursor data in display memory.
+	 * If SDRAM then there's 16MB memory else it's SGRAM
+	 * and can count it based on the power-on straps -
+	 * chip size can be 8Mb or 16Mb, and there can be 4 or
+	 * 8 of them.
+	 * Use the last 1KB of the framebuffer.
+	 */
+	mmio = (void*)((uchar*)scr->mmio+dramInit0);
+	if(*(mmio+1) & 0x40000000)
+		i = 16*1024*1024;
+	else{
+		if(*mmio & 0x08000000)
+			i = 16*1024*1024/8;
+		else
+			i = 8*1024*1024/8;
+		if(*mmio & 0x04000000)
+			i *= 8;
+		else
+			i *= 4;
+	}
+	scr->storage = i - 1024;
+}
+
+static void
+tdfxcurdisable(VGAscr* scr)
+{
+	Cursor3dfx *cursor3dfx;
+
+	if(scr->mmio == 0)
+		return;
+	cursor3dfx = (void*)((uchar*)scr->mmio+hwCur);
+	cursor3dfx->vidProcCfg &= ~0x08000000;
+}
+
+static void
+tdfxcurload(VGAscr* scr, Cursor* curs)
+{
+	int y;
+	uchar *p;
+	Cursor3dfx *cursor3dfx;
+
+	if(scr->mmio == 0)
+		return;
+	cursor3dfx = (void*)((uchar*)scr->mmio+hwCur);
+
+	/*
+	 * Disable the cursor then load the new image in
+	 * the top-left of the 64x64 array.
+	 * The cursor data is stored in memory as 128-bit
+	 * words consisting of plane 0 in the least significant 64-bits
+	 * and plane 1 in the most significant.
+	 * The X11 cursor truth table is:
+	 *	p0 p1	colour
+	 *	 0  0	transparent
+	 *	 0  1	transparent
+	 *	 1  0	hwCurC0
+	 *	 1  1	hwCurC1
+	 * Unused portions of the image have been initialised to be
+	 * transparent.
+	 */
+	cursor3dfx->vidProcCfg &= ~0x08000000;
+	p = (uchar*)scr->vaddr + scr->storage;
+	for(y = 0; y < 16; y++){
+		*p++ = curs->clr[2*y]|curs->set[2*y];
+		*p++ = curs->clr[2*y+1]|curs->set[2*y+1];
+		p += 6;
+		*p++ = curs->set[2*y];
+		*p++ = curs->set[2*y+1];
+		p += 6;
+	}
+
+	/*
+	 * Save the cursor hotpoint and enable the cursor.
+	 * The 0,0 cursor point is bottom-right.
+	 */
+	scr->offset.x = 63+curs->offset.x;
+	scr->offset.y = 63+curs->offset.y;
+	cursor3dfx->vidProcCfg |= 0x08000000;
+}
+
+static int
+tdfxcurmove(VGAscr* scr, Point p)
+{
+	Cursor3dfx *cursor3dfx;
+
+	if(scr->mmio == 0)
+		return 1;
+	cursor3dfx = (void*)((uchar*)scr->mmio+hwCur);
+
+	cursor3dfx->hwCurLoc = ((p.y+scr->offset.y)<<16)|(p.x+scr->offset.x);
+
+	return 0;
+}
+
+static void
+tdfxcurenable(VGAscr* scr)
+{
+	Cursor3dfx *cursor3dfx;
+
+	tdfxenable(scr);
+	if(scr->mmio == 0)
+		return;
+	cursor3dfx = (void*)((uchar*)scr->mmio+hwCur);
+
+	/*
+	 * Cursor colours.
+	 */
+	cursor3dfx->hwCurC0 = 0xFFFFFFFF;
+	cursor3dfx->hwCurC1 = 0x00000000;
+
+	/*
+	 * Initialise the 64x64 cursor to be transparent (X11 mode).
+	 */
+	cursor3dfx->hwCurPatAddr = scr->storage;
+	memset((uchar*)scr->vaddr + scr->storage, 0, 64*16);
+
+	/*
+	 * Load, locate and enable the 64x64 cursor in X11 mode.
+	 */
+	tdfxcurload(scr, &arrow);
+	tdfxcurmove(scr, ZP);
+	cursor3dfx->vidProcCfg |= 0x08000002;
+}
+
+VGAdev vga3dfxdev = {
+	"3dfx",
+
+	tdfxenable,
+	nil,
+	nil,
+	nil,
+};
+
+VGAcur vga3dfxcur = {
+	"3dfxhwgc",
+
+	tdfxcurenable,
+	tdfxcurdisable,
+	tdfxcurload,
+	tdfxcurmove,
+};