--- linux-2.4.17-orig/drivers/pci/quirks.c	Sun Nov 11 19:09:33 2001
+++ linux/drivers/pci/quirks.c	Tue Jan 22 16:50:05 2002
@@ -21,6 +21,23 @@
 
 #undef DEBUG
 
+/* Power Saving for Athlon/Duron CPUs on Via Chipsets has to be enabled by 
+ * kernel-boot-option "amd_disconnect=yes" . This is cause it looks like 
+ * there are some stability problems on some boards when this option is 
+ * enabled.
+ */
+
+int enable_amd_disconnect;
+
+static int __init amd_disconnect_setup (char *str) {
+        if(!strncmp(str,"yes",3)) {
+                enable_amd_disconnect=1;
+					                                                }
+        return 1;
+}
+
+__setup("amd_disconnect=", amd_disconnect_setup);
+
 /* Deal with broken BIOS'es that neglect to enable passive release,
    which can cause problems in combination with the 82441FX/PPro MTRRs */
 static void __init quirk_passive_release(struct pci_dev *dev)
@@ -146,6 +163,47 @@
 	printk(KERN_INFO "Applying VIA southbridge workaround.\n");
 }
 
+/* Power Saving for Athlon/Duron/AthonXP CPUs on Via Chipsets.
+ * Found in the net and modified for supporting KT266/KT266A chipsets
+ * by Daniel Nofftz <nofftz@castor.uni-trier.de>
+ * This Funktion must be enabled by kernel booting option "amd_disconnect=yes"!
+ */
+
+static void __init quirk_amddisconnect(struct pci_dev *dev)
+{
+	u16 did;
+	u32 res32;
+	
+	if(!enable_amd_disconnect) return;
+
+        pci_read_config_word(dev,PCI_DEVICE_ID,&did);
+
+	
+	if(did==PCI_DEVICE_ID_VIA_8367_0)
+	{
+		pci_read_config_dword(dev,0x92&0xfc,&res32);
+		if ((res32&0x00800000)==0) 
+		{
+			printk(KERN_INFO "Enabling disconnect in VIA northbridge: KT266/266A chipset found.\n");
+			res32|=0x00800000;
+			pci_write_config_dword(dev,0x92&0xfc,res32);
+		} else
+			printk(KERN_INFO "Disconnect already anabled in VIA northbridge.\n");
+
+	}
+	else if((did==PCI_DEVICE_ID_VIA_8363_0)||(did==PCI_DEVICE_ID_VIA_8371_0))
+	{
+		pci_read_config_dword(dev,0x52&0xfc,&res32);
+	        if ((res32&0x00800000)==0) 
+		{	
+			printk(KERN_INFO "Enabling disconnect in VIA northbridge: KT133/KX133 chipset found\n");
+			res32|=0x00800000;
+			pci_write_config_dword(dev,0x52&0xfc,res32);
+		} else
+			printk(KERN_INFO "Disconnect already anabled in VIA northbridge.\n");
+		
+	}
+}
 /*
  *	VIA Apollo VP3 needs ETBF on BT848/878
  */
@@ -485,6 +543,9 @@
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8363_0,	quirk_vialatency },
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8371_1,	quirk_vialatency },
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_VIA,	0x3112	/* Not out yet ? */,	quirk_vialatency },
+	{ PCI_FIXUP_FINAL,      PCI_VENDOR_ID_VIA,      PCI_DEVICE_ID_VIA_8367_0,	quirk_amddisconnect },
+        { PCI_FIXUP_FINAL,      PCI_VENDOR_ID_VIA,      PCI_DEVICE_ID_VIA_8363_0,       quirk_amddisconnect },
+        { PCI_FIXUP_FINAL,      PCI_VENDOR_ID_VIA,      PCI_DEVICE_ID_VIA_8371_0,       quirk_amddisconnect },
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C576,	quirk_vsfx },
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C597_0,	quirk_viaetbf },
 	{ PCI_FIXUP_HEADER,	PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C597_0,	quirk_vt82c598_id },