| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright (c) 2013 Google, Inc |
| */ |
| |
| #ifdef USE_HOSTCC |
| #include <arpa/inet.h> |
| #else |
| #include <common.h> |
| #endif |
| #include <u-boot/crc.h> |
| |
| #define POLY (0x1070U << 3) |
| |
| static unsigned char _crc8(unsigned short data) |
| { |
| int i; |
| |
| for (i = 0; i < 8; i++) { |
| if (data & 0x8000) |
| data = data ^ POLY; |
| data = data << 1; |
| } |
| |
| return (unsigned char)(data >> 8); |
| } |
| |
| unsigned int crc8(unsigned int crc, const unsigned char *vptr, int len) |
| { |
| int i; |
| |
| for (i = 0; i < len; i++) |
| crc = _crc8((crc ^ vptr[i]) << 8); |
| |
| return crc; |
| } |