| Thomas Gleixner | 40b0b3f | 2019-06-03 07:44:46 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Evgeniy Polyakov | 7657ec1 | 2005-08-17 15:17:26 +0400 | [diff] [blame] | 2 | /* |
| 3 | * crc16.h - CRC-16 routine |
| 4 | * |
| Evgeniy Polyakov | f24ec7f | 2005-09-12 17:12:43 +0400 | [diff] [blame] | 5 | * Implements the standard CRC-16: |
| Evgeniy Polyakov | 7657ec1 | 2005-08-17 15:17:26 +0400 | [diff] [blame] | 6 | * Width 16 |
| 7 | * Poly 0x8005 (x^16 + x^15 + x^2 + 1) |
| 8 | * Init 0 |
| 9 | * |
| Evgeniy Polyakov | 7657ec1 | 2005-08-17 15:17:26 +0400 | [diff] [blame] | 10 | * Copyright (c) 2005 Ben Gardner <bgardner@wabtec.com> |
| Evgeniy Polyakov | 7657ec1 | 2005-08-17 15:17:26 +0400 | [diff] [blame] | 11 | */ |
| 12 | |
| 13 | #ifndef __CRC16_H |
| 14 | #define __CRC16_H |
| 15 | |
| 16 | #include <linux/types.h> |
| 17 | |
| Evgeniy Polyakov | 7657ec1 | 2005-08-17 15:17:26 +0400 | [diff] [blame] | 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 | |