$Id:$

Patch by Olivier Baudron <olivier.baudron@m4x.org>
Credit: Kevin E. Martin <kem@freedesktop.org> for an initial patch

This patch is an attempt to fix:
xorg-x11-6.8.2-use-linux-native-pciscan-by-default.patch

--- xc/programs/Xserver/hw/xfree86/int10/helper_exec.c.int10h	2005-07-24 00:59:18.000000000 +0200
+++ xc/programs/Xserver/hw/xfree86/int10/helper_exec.c	2005-07-24 13:50:51.000000000 +0200
@@ -25,6 +25,10 @@
 
 static int pciCfg1in(CARD16 addr, CARD32 *val);
 static int pciCfg1out(CARD16 addr, CARD32 val);
+static int pciCfg1inw(CARD16 addr, CARD16 *val);
+static int pciCfg1outw(CARD16 addr, CARD16 val);
+static int pciCfg1inb(CARD16 addr, CARD8 *val);
+static int pciCfg1outb(CARD16 addr, CARD8 val);
 #if defined (_PC)
 static void SetResetBIOSVars(xf86Int10InfoPtr pInt, Bool set);
 #endif
@@ -319,7 +323,8 @@
 	}
 #endif /* __NOT_YET__ */
     } else {
-	val = inb(Int10Current->ioBase + port);
+	if (!pciCfg1inb(port, &val))
+	    val = inb(Int10Current->ioBase + port);
 #ifdef PRINT_PORT
 	ErrorF(" inb(%#x) = %2.2x\n", port, val);
 #endif
@@ -341,7 +346,8 @@
 	(void)getsecs(&sec, &usec);
 	val = (CARD16)(usec / 3);
     } else {
-	val = inw(Int10Current->ioBase + port);
+	if (!pciCfg1inw(port, &val))
+	    val = inw(Int10Current->ioBase + port);
     }
 #ifdef PRINT_PORT
     ErrorF(" inw(%#x) = %4.4x\n", port, val);
@@ -378,7 +384,8 @@
 #ifdef PRINT_PORT
 	ErrorF(" outb(%#x, %2.2x)\n", port, val);
 #endif
-	outb(Int10Current->ioBase + port, val);
+	if (!pciCfg1outb(port, val))
+	    outb(Int10Current->ioBase + port, val);
     }
 }
 
@@ -389,7 +396,8 @@
     ErrorF(" outw(%#x, %4.4x)\n", port, val);
 #endif
 
-    outw(Int10Current->ioBase + port, val);
+    if (!pciCfg1outw(port, val))
+	outw(Int10Current->ioBase + port, val);
 }
 
 CARD32
@@ -480,7 +488,81 @@
 	return 1;
     }
     if (addr == 0xCFC) {
-	pciWriteLong(TAG(PciCfg1Addr), OFFSET(PciCfg1Addr),val);
+	pciWriteLong(TAG(PciCfg1Addr), OFFSET(PciCfg1Addr), val);
+	return 1;
+    }
+    return 0;
+}
+
+static int
+pciCfg1inw(CARD16 addr, CARD16 *val)
+{
+    int offset, shift;
+
+    if ((addr >= 0xCF8) && (addr <= 0xCFB)) {
+	shift = (addr - 0xCF8) * 8;
+	*val = (PciCfg1Addr >> shift) & 0xffff;
+	return 1;
+    }
+    if ((addr >= 0xCFC) && (addr <= 0xCFF)) {
+	offset = addr - 0xCFC;
+	*val = pciReadWord(TAG(PciCfg1Addr), OFFSET(PciCfg1Addr) + offset);
+	return 1;
+    }
+    return 0;
+}
+
+static int
+pciCfg1outw(CARD16 addr, CARD16 val)
+{
+    int offset, shift;
+
+    if ((addr >= 0xCF8) && (addr <= 0xCFB)) {
+	shift = (addr - 0xCF8) * 8;
+	PciCfg1Addr &= ~(0xffff << shift);
+	PciCfg1Addr |= ((CARD32) val) << shift;
+	return 1;
+    }
+    if ((addr >= 0xCFC) && (addr <= 0xCFF)) {
+	offset = addr - 0xCFC;
+	pciWriteWord(TAG(PciCfg1Addr), OFFSET(PciCfg1Addr) + offset, val);
+	return 1;
+    }
+    return 0;
+}
+
+static int
+pciCfg1inb(CARD16 addr, CARD8 *val)
+{
+    int offset, shift;
+
+    if ((addr >= 0xCF8) && (addr <= 0xCFB)) {
+	shift = (addr - 0xCF8) * 8;
+	*val = (PciCfg1Addr >> shift) & 0xff;
+	return 1;
+    }
+    if ((addr >= 0xCFC) && (addr <= 0xCFF)) {
+	offset = addr - 0xCFC;
+	*val = pciReadByte(TAG(PciCfg1Addr), OFFSET(PciCfg1Addr) + offset);
+	return 1;
+    }
+    return 0;
+}
+
+static int
+pciCfg1outb(CARD16 addr, CARD8 val)
+{
+    int offset, shift;
+
+    if ((addr >= 0xCF8) && (addr <= 0xCFB)) {
+	shift = (addr - 0xCF8) * 8;
+	PciCfg1Addr &= ~(0xff << shift);
+	PciCfg1Addr |= ((CARD32) val) << shift;
+	return 1;
+    }
+    if ((addr >= 0xCFC) && (addr <= 0xCFF)) {
+	offset = addr - 0xCFC;
+	pciWriteByte(TAG(PciCfg1Addr), OFFSET(PciCfg1Addr) + offset, val);
 	return 1;
     }
     return 0;