Import sources from 2011-03-30 iso image

1 files changed, 163 insertions, 0 deletions

diff --git a/sys/src/cmd/aux/vga/vision964.c b/sys/src/cmd/aux/vga/vision964.c
new file mode 100755
index 000000000..22266c73a
--- /dev/null
+++ b/sys/src/cmd/aux/vga/vision964.c
@@ -0,0 +1,163 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+
+#include "pci.h"
+#include "vga.h"
+
+/*
+ * S3 Vision964 GUI Accelerator.
+ */
+static void
+snarf(Vga* vga, Ctlr* ctlr)
+{
+	s3generic.snarf(vga, ctlr);
+	vga->crt[0x22] = vgaxi(Crtx, 0x22);
+	vga->crt[0x24] = vgaxi(Crtx, 0x24);
+	vga->crt[0x26] = vgaxi(Crtx, 0x26);
+}
+
+static void
+options(Vga*, Ctlr* ctlr)
+{	
+	ctlr->flag |= Hlinear|Henhanced|Foptions;
+}
+
+static void
+init(Vga* vga, Ctlr* ctlr)
+{
+	Mode *mode;
+	ulong x;
+	int sid, dbl, bpp, divide;
+	char *val;
+
+	if(vga->mode->z > 8)
+		error("depth %d not supported\n", vga->mode->z);
+
+	mode = vga->mode;
+	if(vga->ramdac && (vga->ramdac->flag & Uclk2)){
+		resyncinit(vga, ctlr, Uenhanced, 0);
+		vga->crt[0x00] = ((mode->ht/2)>>3)-5;
+		vga->crt[0x01] = ((mode->x/2)>>3)-1;
+		vga->crt[0x02] = ((mode->shb/2)>>3)-1;
+	
+		x = (mode->ehb/2)>>3;
+		vga->crt[0x03] = 0x80|(x & 0x1F);
+		vga->crt[0x04] = (mode->shs/2)>>3;
+		vga->crt[0x05] = ((mode->ehs/2)>>3) & 0x1F;
+		if(x & 0x20)
+			vga->crt[0x05] |= 0x80;
+		vga->crt[0x13] = mode->x/8;
+	}
+	else if(mode->z == 8)
+		resyncinit(vga, ctlr, Uenhanced, 0);
+	s3generic.init(vga, ctlr);
+	/*
+	if((ctlr->flag & Uenhanced) == 0)
+		vga->crt[0x33] &= ~0x20;
+	 */
+	vga->crt[0x3B] = (vga->crt[0]+vga->crt[4]+1)/2;
+	if(vga->crt[0x3B] & 0x100)
+		vga->crt[0x5D] |= 0x40;
+	vga->crt[0x55] = 0x00;
+
+	vga->crt[0x40] &= ~0x10;
+	vga->crt[0x53] &= ~0x20;
+	vga->crt[0x58] &= ~0x48;
+	if(dbattr(vga->attr, "sam512") == 0)
+		vga->crt[0x58] |= 0x40;		/* set 256 word SAM, always works */
+	vga->crt[0x65] = 0x00;
+	vga->crt[0x66] &= ~0x07;
+	vga->crt[0x6D] = 0x00;
+	if(ctlr->flag & Uenhanced){
+		if(vga->ramdac && (vga->ramdac->flag & Hsid32))
+			sid = 32;
+		else
+			sid = 64;
+		if(vga->ramdac && (vga->ramdac->flag & Uclk2))
+			dbl = 2;
+		else
+			dbl = 1;
+		if(mode->z < 4)
+			bpp = 4;
+		else
+			bpp = mode->z;
+		divide = sid/(dbl*bpp);
+		switch(divide){
+		case 2:
+			vga->crt[0x66] |= 0x01;
+			break;
+		case 4:
+			vga->crt[0x66] |= 0x02;
+			break;
+		case 8:
+			vga->crt[0x66] |= 0x03;
+			break;
+		case 16:
+			vga->crt[0x66] |= 0x04;
+			break;
+		case 32:
+			vga->crt[0x66] |= 0x05;
+			break;
+		}
+
+		vga->crt[0x40] |= 0x10;
+		vga->crt[0x65] |= 0x02;
+		if(vga->ramdac && (vga->ramdac->flag & Hsid32))
+			vga->crt[0x66] |= 0x10;
+
+		/*
+		 * Some heuristics (what part of aux/vga isn't?)
+		 * to prevent some of the right border appearing
+		 * on the left edge of the screen.
+		 */
+		if(dbattr(vga->attr, "vclkphs"))
+			vga->crt[0x67] |= 0x01;
+		if(val = dbattr(vga->attr, "delaybl"))
+			vga->crt[0x6D] |= strtoul(val, 0, 0) & 0x07;
+		else if(mode->x > 1024)
+			vga->crt[0x6D] |= 0x01;
+		else
+			vga->crt[0x6D] |= 0x03;
+
+		if(val = dbattr(vga->attr, "delaysc"))
+			vga->crt[0x6D] |= (strtoul(val, 0, 0) & 0x07)<<4;
+	}
+}
+
+static void
+load(Vga* vga, Ctlr* ctlr)
+{
+	ushort advfunc;
+
+	s3generic.load(vga, ctlr);
+	vgaxo(Crtx, 0x65, vga->crt[0x65]);
+	vgaxo(Crtx, 0x66, vga->crt[0x66]);
+	vgaxo(Crtx, 0x6D, vga->crt[0x6D]);
+
+	advfunc = 0x0000;
+	if(ctlr->flag & Uenhanced)
+		advfunc = 0x0001;
+	outportw(0x4AE8, advfunc);
+}
+
+static void
+dump(Vga* vga, Ctlr* ctlr)
+{
+	s3generic.dump(vga, ctlr);
+	printitem(ctlr->name, "Crt22");
+	printreg(vga->crt[0x22]);
+	printitem(ctlr->name, "Crt24");
+	printreg(vga->crt[0x24]);
+	printitem(ctlr->name, "Crt26");
+	printreg(vga->crt[0x26]);
+}
+
+Ctlr vision964 = {
+	"vision964",			/* name */
+	snarf,				/* snarf */
+	options,			/* options */
+	init,				/* init */
+	load,				/* load */
+	dump,				/* dump */
+};