1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * crc16.h - CRC-16 routine 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * Implements the standard CRC-16: 5*4882a593Smuzhiyun * Width 16 6*4882a593Smuzhiyun * Poly 0x8005 (x^16 + x^15 + x^2 + 1) 7*4882a593Smuzhiyun * Init 0 8*4882a593Smuzhiyun * 9*4882a593Smuzhiyun * Copyright (c) 2005 Ben Gardner <bgardner@wabtec.com> 10*4882a593Smuzhiyun * 11*4882a593Smuzhiyun * This source code is licensed under the GNU General Public License, 12*4882a593Smuzhiyun * Version 2. See the file COPYING for more details. 13*4882a593Smuzhiyun */ 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #ifndef __CRC16_H 16*4882a593Smuzhiyun #define __CRC16_H 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun #include <linux/types.h> 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun extern u16 const crc16_table[256]; 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun extern u16 crc16(u16 crc, const u8 *buffer, size_t len); 23*4882a593Smuzhiyun crc16_byte(u16 crc,const u8 data)24*4882a593Smuzhiyunstatic inline u16 crc16_byte(u16 crc, const u8 data) 25*4882a593Smuzhiyun { 26*4882a593Smuzhiyun return (crc >> 8) ^ crc16_table[(crc ^ data) & 0xff]; 27*4882a593Smuzhiyun } 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun #endif /* __CRC16_H */ 30