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/*********************************************************************
*
* Filename: crc.h
* Version:
* Description: CRC routines
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Mon Aug 4 20:40:53 1997
* Modified at: Tue Dec 15 22:18:53 1998
* Modified by: Dag Brattli <dagb@cs.uit.no>
*
********************************************************************/
#ifndef IR_CRC_H
#define IR_CRC_H
#include <linux/types.h>
#define INIT_FCS 0xffff /* Initial FCS value */
#define GOOD_FCS 0xf0b8 /* Good final FCS value */
/* Recompute the FCS with one more character appended. */
#define IR_FCS(fcs, c) (((fcs) >> 8) ^ irda_crc16_table[((fcs) ^ (c)) & 0xff])
/* Recompute the FCS with len bytes appended. */
unsigned short crc_calc( __u16 fcs, __u8 const *buf, size_t len);
extern __u16 const irda_crc16_table[];
#endif
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