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 | |