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
22 static 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
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