LXR linux/include/linux/crc16.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 *      crc16.h - CRC-16 routine
   4 *
   5 * Implements the standard CRC-16:
   6 *   Width 16
   7 *   Poly  0x8005 (x^16 + x^15 + x^2 + 1)
   8 *   Init  0
   9 *
  10 * Copyright (c) 2005 Ben Gardner <bgardner@wabtec.com>
  11 */
  12
  13#ifndef __CRC16_H
  14#define __CRC16_H
  15
  16#include <linux/types.h>
  17
  18extern u16 const crc16_table[256];
  19
  20extern u16 crc16(u16 crc, const u8 *buffer, size_t len);
  21
  22static inline u16 crc16_byte(u16 crc, const u8 data)
  23{
  24        return (crc >> 8) ^ crc16_table[(crc ^ data) & 0xff];
  25}
  26
  27#endif /* __CRC16_H */
  28
  29