--- /dev/null
+/*********************************************************************
+ *
+ * Filename: fcs.h
+ * Version:
+ * Description: fcs routines for irda
+ * Status: Experimental.
+ * Author: Dag Brattli <dagb@cs.uit.no>
+ * Created at: Mon Aug 4 20:40:53 1997
+ * Modified at: Sat Jul 17 08:43:59 1999
+ * Modified by: Thomas Schneider <nok-trace-men@dev-thomynet.de>
+ * Sources: crc.h by Dag Brattli <dagb@cs.uit.no> in
+ * linux-irda-project
+ *
+ ********************************************************************/
+
+#ifndef FCS_H
+#define FCS_H
+
+#include <linux/types.h>
+
+#define INIT_FCS 0xffff /* Initial FCS value */
+#define GOOD_FCS 0xf0b8 /* Good final FCS value */
+
+#define IR_FCS(fcs, byte)((fcs >> 8)^irda_fcs16_table[ (fcs^byte) & 0xff])
+
+unsigned short fcs_calc( __u16 oldfcs, __u8 *buf, int len);
+
+extern __u16 irda_fcs16_table[];
+
+#endif