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40b0b3f8 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
7657ec1f EP |
2 | /* |
3 | * crc16.h - CRC-16 routine | |
4 | * | |
f24ec7f6 | 5 | * Implements the standard CRC-16: |
7657ec1f EP |
6 | * Width 16 |
7 | * Poly 0x8005 (x^16 + x^15 + x^2 + 1) | |
8 | * Init 0 | |
9 | * | |
7657ec1f | 10 | * Copyright (c) 2005 Ben Gardner <bgardner@wabtec.com> |
7657ec1f EP |
11 | */ |
12 | ||
13 | #ifndef __CRC16_H | |
14 | #define __CRC16_H | |
15 | ||
16 | #include <linux/types.h> | |
17 | ||
7657ec1f EP |
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 |