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 18 extern u16 const crc16_table[256]; 19 20 extern u16 crc16(u16 crc, const u8 *buffer, size_t len); 21 crc16_byte(u16 crc,const u8 data)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