1 /* 2 * crc16.h - CRC-16 routine 3 * 4 * Implements the standard CRC-16: 5 * Width 16 6 * Poly 0x8005 (x^16 + x^15 + x^2 + 1) 7 * Init 0 8 * 9 * Copyright (c) 2005 Ben Gardner <bgardner@wabtec.com> 10 * 11 * This source code is licensed under the GNU General Public License, 12 * Version 2. See the file COPYING for more details. 13 */ 14 15 #ifndef __CRC16_H 16 #define __CRC16_H 17 18 #include <linux/types.h> 19 20 extern u16 const crc16_table[256]; 21 22 extern u16 crc16(u16 crc, const u8 *buffer, size_t len); 23 24 static inline u16 crc16_byte(u16 crc, const u8 data) 25 { 26 return (crc >> 8) ^ crc16_table[(crc ^ data) & 0xff]; 27 } 28 29 #endif /* __CRC16_H */ 30