-#define EJTAG_IBS 0xFF301000
-#define EJTAG_IBA1 0xFF301100
-#define EJTAG_DBS 0xFF302000
-#define EJTAG_DBA1 0xFF302100
+/* EJTAG_V20_* was tested on Broadcom BCM7401
+ * and may or will differ with other hardware. For example EZ4021-FC. */
+#define EJTAG_V20_IBS 0xFF300004
+#define EJTAG_V20_IBA0 0xFF300100
+#define EJTAG_V20_IBC_OFFS 0x4 /* IBC Offset */
+#define EJTAG_V20_IBM_OFFS 0x8
+#define EJTAG_V20_IBAn_STEP 0x10 /* Offset for next channel */
+#define EJTAG_V20_DBS 0xFF30008
+#define EJTAG_V20_DBA0 0xFF300200
+#define EJTAG_V20_DBC_OFFS 0x4
+#define EJTAG_V20_DBM_OFFS 0x8
+#define EJTAG_V20_DBV_OFFS 0xc
+#define EJTAG_V20_DBAn_STEP 0x10
+
+#define EJTAG_V25_IBS 0xFF301000
+#define EJTAG_V25_IBA0 0xFF301100
+#define EJTAG_V25_IBM_OFFS 0x8
+#define EJTAG_V25_IBASID_OFFS 0x10
+#define EJTAG_V25_IBC_OFFS 0x18
+#define EJTAG_V25_IBAn_STEP 0x100
+#define EJTAG_V25_DBS 0xFF302000
+#define EJTAG_V25_DBA0 0xFF302100
+#define EJTAG_V25_DBM_OFFS 0x8
+#define EJTAG_V25_DBASID_OFFS 0x10
+#define EJTAG_V25_DBC_OFFS 0x18
+#define EJTAG_V25_DBV_OFFS 0x20
+#define EJTAG_V25_DBAn_STEP 0x100
+