diff -cur ata.ORG/ata-chipset.c ata/ata-chipset.c
--- ata.ORG/ata-chipset.c	2007-12-14 10:20:28.000000000 +0900
+++ ata/ata-chipset.c	2007-12-14 13:41:16.000000000 +0900
@@ -1346,6 +1346,7 @@
      { ATA_ATI_IXP400_S1, 0x00, SIIMEMIO, 0, ATA_SA150, "IXP400" },
      { ATA_ATI_IXP400_S2, 0x00, SIIMEMIO, 0, ATA_SA150, "IXP400" },
      { ATA_ATI_IXP600,    0x00, 0,        0, ATA_UDMA6, "IXP600" },
+     { ATA_ATI_IXP600_S1, 0x00, 0,        0, ATA_SA300, "IXP600" },
      { ATA_ATI_IXP700,    0x00, 0,        0, ATA_UDMA6, "IXP700" },
      { 0, 0, 0, 0, 0, 0}};
 
@@ -1372,8 +1373,19 @@
 
     /* IXP600 & IXP700 only have 1 PATA channel */
     if ((ctlr->chip->chipid == ATA_ATI_IXP600) ||
-	(ctlr->chip->chipid == ATA_ATI_IXP700))
+	(ctlr->chip->chipid == ATA_ATI_IXP700)) {
 	ctlr->channels = 1;
+    }
+    else if (ctlr->chip->chipid == ATA_ATI_IXP600_S1) {
+        ctlr->r_type2 = SYS_RES_MEMORY;
+        ctlr->r_rid2 = PCIR_BAR(5);
+	if ((ctlr->r_res2 = bus_alloc_resource_any(dev, ctlr->r_type2,
+				   &ctlr->r_rid2, RF_ACTIVE))) {
+	  return ata_ahci_chipinit(dev);
+	}
+	else
+          return ENXIO;
+    }
 
     ctlr->setmode = ata_ati_setmode;
     return 0;
diff -cur ata.ORG/ata-pci.h ata/ata-pci.h
--- ata.ORG/ata-pci.h	2007-11-22 16:50:36.000000000 +0900
+++ ata/ata-pci.h	2007-12-14 13:36:44.000000000 +0900
@@ -103,6 +103,7 @@
 #define ATA_ATI_IXP400          0x43761002
 #define ATA_ATI_IXP400_S1       0x43791002
 #define ATA_ATI_IXP400_S2       0x437a1002
+#define ATA_ATI_IXP600_S1       0x43801002
 #define ATA_ATI_IXP600          0x438c1002
 #define ATA_ATI_IXP700          0x439c1002