diff --git a/drivers/firewire/core.h b/drivers/firewire/core.h
index b2a7b65..7a9759b 100644
--- a/drivers/firewire/core.h
+++ b/drivers/firewire/core.h
@@ -27,8 +27,12 @@
 #define PHY_LINK_ACTIVE		0x80
 #define PHY_CONTENDER		0x40
 #define PHY_BUS_RESET		0x40
+#define PHY_EXTENDED_REGISTERS	0xe0
 #define PHY_BUS_SHORT_RESET	0x40
 #define PHY_INT_STATUS_BITS	0x3c
+#define PHY_ENABLE_ACCEL	0x02
+#define PHY_ENABLE_MULTI	0x01
+#define PHY_PAGE_SELECT		0xe0
 
 #define BANDWIDTH_AVAILABLE_INITIAL	4915
 #define BROADCAST_CHANNEL_INITIAL	(1 << 31 | 31)