| Tom Rini | 10e4779 | 2018-05-06 17:58:06 -0400 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| Simon Glass | 46e0bc9 | 2013-11-10 10:26:47 -0700 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (c) 2013 Google, Inc | ||||
| Simon Glass | 46e0bc9 | 2013-11-10 10:26:47 -0700 | [diff] [blame] | 4 | */ |
| 5 | |||||
| Simon Glass | ca9b0af | 2019-11-14 12:57:14 -0700 | [diff] [blame] | 6 | #ifdef USE_HOSTCC |
| 7 | #include <arpa/inet.h> | ||||
| Simon Glass | ca9b0af | 2019-11-14 12:57:14 -0700 | [diff] [blame] | 8 | #endif |
| 9 | #include <u-boot/crc.h> | ||||
| Simon Glass | 46e0bc9 | 2013-11-10 10:26:47 -0700 | [diff] [blame] | 10 | |
| Stefan Roese | a0d9b99 | 2016-04-08 15:56:29 +0200 | [diff] [blame] | 11 | #define POLY (0x1070U << 3) |
| 12 | |||||
| 13 | static unsigned char _crc8(unsigned short data) | ||||
| Simon Glass | 46e0bc9 | 2013-11-10 10:26:47 -0700 | [diff] [blame] | 14 | { |
| Stefan Roese | a0d9b99 | 2016-04-08 15:56:29 +0200 | [diff] [blame] | 15 | int i; |
| Simon Glass | 46e0bc9 | 2013-11-10 10:26:47 -0700 | [diff] [blame] | 16 | |
| Stefan Roese | a0d9b99 | 2016-04-08 15:56:29 +0200 | [diff] [blame] | 17 | for (i = 0; i < 8; i++) { |
| 18 | if (data & 0x8000) | ||||
| 19 | data = data ^ POLY; | ||||
| 20 | data = data << 1; | ||||
| Simon Glass | 46e0bc9 | 2013-11-10 10:26:47 -0700 | [diff] [blame] | 21 | } |
| 22 | |||||
| Stefan Roese | a0d9b99 | 2016-04-08 15:56:29 +0200 | [diff] [blame] | 23 | return (unsigned char)(data >> 8); |
| 24 | } | ||||
| 25 | |||||
| 26 | unsigned int crc8(unsigned int crc, const unsigned char *vptr, int len) | ||||
| 27 | { | ||||
| 28 | int i; | ||||
| 29 | |||||
| 30 | for (i = 0; i < len; i++) | ||||
| 31 | crc = _crc8((crc ^ vptr[i]) << 8); | ||||
| 32 | |||||
| 33 | return crc; | ||||
| Simon Glass | 46e0bc9 | 2013-11-10 10:26:47 -0700 | [diff] [blame] | 34 | } |