diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index 3d9c412..ea7a578 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -118,37 +118,24 @@
 #define OTHER_MCAST_TABLE(p)		(0x1500 + ((p) << 10))
 #define UNICAST_TABLE(p)		(0x1600 + ((p) << 10))
 
-/* These macros describe Ethernet Port Sdma configuration reg (SDCR) bits */
-#define RIFB				(1 << 0)
-#define RX_BURST_SIZE_1_64BIT		(0 << 1)
-#define RX_BURST_SIZE_2_64BIT		(1 << 1)
+
+/*
+ * SDMA configuration register.
+ */
 #define RX_BURST_SIZE_4_64BIT		(2 << 1)
-#define RX_BURST_SIZE_8_64BIT		(3 << 1)
-#define RX_BURST_SIZE_16_64BIT		(4 << 1)
 #define BLM_RX_NO_SWAP			(1 << 4)
-#define BLM_RX_BYTE_SWAP		(0 << 4)
 #define BLM_TX_NO_SWAP			(1 << 5)
-#define BLM_TX_BYTE_SWAP		(0 << 5)
-#define DESCRIPTORS_BYTE_SWAP		(1 << 6)
-#define DESCRIPTORS_NO_SWAP		(0 << 6)
-#define IPG_INT_RX(value)		(((value) & 0x3fff) << 8)
-#define TX_BURST_SIZE_1_64BIT		(0 << 22)
-#define TX_BURST_SIZE_2_64BIT		(1 << 22)
 #define TX_BURST_SIZE_4_64BIT		(2 << 22)
-#define TX_BURST_SIZE_8_64BIT		(3 << 22)
-#define TX_BURST_SIZE_16_64BIT		(4 << 22)
 
 #if defined(__BIG_ENDIAN)
 #define PORT_SDMA_CONFIG_DEFAULT_VALUE		\
 		RX_BURST_SIZE_4_64BIT	|	\
-		IPG_INT_RX(0)		|	\
 		TX_BURST_SIZE_4_64BIT
 #elif defined(__LITTLE_ENDIAN)
 #define PORT_SDMA_CONFIG_DEFAULT_VALUE		\
 		RX_BURST_SIZE_4_64BIT	|	\
 		BLM_RX_NO_SWAP		|	\
 		BLM_TX_NO_SWAP		|	\
-		IPG_INT_RX(0)		|	\
 		TX_BURST_SIZE_4_64BIT
 #else
 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined