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83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
60d18d3f SG |
2 | /* |
3 | * Copyright (c) 2013 Google, Inc | |
60d18d3f SG |
4 | */ |
5 | ||
c3a4d1c3 SG |
6 | #ifdef USE_HOSTCC |
7 | #include <arpa/inet.h> | |
c3a4d1c3 | 8 | #endif |
3b52337c | 9 | #include <asm/sections.h> |
c3a4d1c3 | 10 | #include <u-boot/crc.h> |
60d18d3f | 11 | |
456ecd08 SR |
12 | #define POLY (0x1070U << 3) |
13 | ||
3b52337c | 14 | __rcode static unsigned char _crc8(unsigned short data) |
60d18d3f | 15 | { |
456ecd08 SR |
16 | int i; |
17 | ||
18 | for (i = 0; i < 8; i++) { | |
19 | if (data & 0x8000) | |
20 | data = data ^ POLY; | |
21 | data = data << 1; | |
60d18d3f SG |
22 | } |
23 | ||
456ecd08 SR |
24 | return (unsigned char)(data >> 8); |
25 | } | |
26 | ||
3b52337c | 27 | __rcode unsigned int crc8(unsigned int crc, const unsigned char *vptr, int len) |
456ecd08 SR |
28 | { |
29 | int i; | |
30 | ||
31 | for (i = 0; i < len; i++) | |
32 | crc = _crc8((crc ^ vptr[i]) << 8); | |
33 | ||
34 | return crc; | |
60d18d3f | 35 | } |
6f1b27a7 SG |
36 | |
37 | void crc8_wd_buf(const unsigned char *input, unsigned int len, | |
38 | unsigned char output[1], unsigned int chunk_sz) | |
39 | { | |
40 | *output = crc8(0, input, len); | |
41 | } |