diff -urN -X ignore orig/linux-2.4.21-pre4/include/asm-mips/serial.h new/linux-2.4.21-pre4/include/asm-mips/serial.h
--- orig/linux-2.4.21-pre4/include/asm-mips/serial.h    Mon Jun 16 08:42:21 2003
+++ new/linux-2.4.21-pre4/include/asm-mips/serial.h     Tue Feb 10 18:10:44 2004
@@ -332,6 +332,18 @@
 #else
 #define DDB5477_SERIAL_PORT_DEFNS
 #endif
+#ifdef CONFIG_TANBAC_TB0229
+#include <asm/vr41xx/vr41xx.h>
+#define VR4131_SERIAL_PORT_DEFNS                                       \
+        { .baud_base = 1152000, .irq = SIU_IRQ,                        \
+         .flags = STD_COM_FLAGS, .iomem_base = (u8*)0xaf000800,        \
+         .iomem_reg_shift = 0, .io_type = SERIAL_IO_MEM},              \
+        { .baud_base = 1152000, .irq = DSIU_IRQ,                       \
+         .flags = STD_COM_FLAGS, .iomem_base = (u8*)0xaf000820,        \
+         .iomem_reg_shift = 0, .io_type = SERIAL_IO_MEM},               
+#else
+#define VR4131_SERIAL_PORT_DEFNS
+#endif
 
 #define SERIAL_PORT_DFNS                       \
        IVR_SERIAL_PORT_DEFNS                   \
@@ -349,4 +361,5 @@
        MOMENCO_OCELOT_C_SERIAL_PORT_DEFNS      \
        AU1000_SERIAL_PORT_DEFNS                \
        TXX927_SERIAL_PORT_DEFNS                \
-       DDB5477_SERIAL_PORT_DEFNS
+       DDB5477_SERIAL_PORT_DEFNS               \
+       VR4131_SERIAL_PORT_DEFNS