diff --git a/sys/dev/ata/ata-chipset.c b/sys/dev/ata/ata-chipset.c
index a8d3d4465b25..b00229dea00d 100644
--- a/sys/dev/ata/ata-chipset.c
+++ b/sys/dev/ata/ata-chipset.c
@@ -3941,7 +3941,7 @@ ata_via_ident(device_t dev)
     static struct ata_chip_id new_ids[] =
     {{ ATA_VIA6410,   0x00, 0,      0x00,   ATA_UDMA6, "VIA 6410" },
      { ATA_VIA6420,   0x00, 7,      0x00,   ATA_SA150, "VIA 6420" },
-     { ATA_VIA6421,   0x00, 6,      0x00,   ATA_SA150, "VIA 6421" },
+     { ATA_VIA6421,   0x00, 6,      VIABAR, ATA_SA150, "VIA 6421" },
      { 0, 0, 0, 0, 0, 0 }};
     char buffer[64];
 
@@ -4016,8 +4016,34 @@ ata_via_allocate(device_t dev)
     struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
     struct ata_channel *ch = device_get_softc(dev);
 
-    /* setup the usual register normal pci style */
-    ata_pci_allocate(dev);
+
+    /* newer SATA chips has resources in one BAR for each channel */
+    if (ctlr->chip->cfg2 & VIABAR) {
+	struct resource *r_io;
+	int i, rid;
+		
+	rid = PCIR_BAR(ch->unit);
+	if (!(r_io = bus_alloc_resource_any(device_get_parent(dev),
+	   				    SYS_RES_IOPORT,
+					    &rid, RF_ACTIVE)))
+	    return ENXIO;
+
+	for (i = ATA_DATA; i <= ATA_COMMAND; i ++) {
+	    ch->r_io[i].res = r_io;
+	    ch->r_io[i].offset = i;
+	}
+	ch->r_io[ATA_CONTROL].res = r_io;
+	ch->r_io[ATA_CONTROL].offset = 2 + ATA_IOSIZE;
+	ch->r_io[ATA_IDX_ADDR].res = r_io;
+	ata_default_registers(dev);
+	for (i = ATA_BMCMD_PORT; i <= ATA_BMDTP_PORT; i++) {
+	    ch->r_io[i].res = ctlr->r_res1;
+	    ch->r_io[i].offset = i - ATA_BMCMD_PORT;
+	}
+	ata_generic_hw(dev);
+    }
+    else
+	ata_pci_allocate(dev);
 
     ch->r_io[ATA_SSTATUS].res = ctlr->r_res2;
     ch->r_io[ATA_SSTATUS].offset = (ch->unit << ctlr->chip->cfg1);
diff --git a/sys/dev/ata/ata-pci.h b/sys/dev/ata/ata-pci.h
index 33ccb2698ada..99a1fb10483b 100644
--- a/sys/dev/ata/ata-pci.h
+++ b/sys/dev/ata/ata-pci.h
@@ -355,6 +355,7 @@ struct ata_connect_task {
 #define NV4OFF          0x08
 #define VIACLK          0x10
 #define VIABUG          0x20
+#define VIABAR          0x40
 
 
 /* global prototypes ata-pci.c */