mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-28 22:13:08 +00:00
26 lines
411 B
C
26 lines
411 B
C
|
/*
|
||
|
|
* Copyright (c) 2013 Google, Inc
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: GPL-2.0+
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "linux/crc8.h"
|
||
|
|
|
||
|
|
unsigned int crc8(const unsigned char *vptr, int len)
|
||
|
|
{
|
||
|
|
const unsigned char *data = vptr;
|
||
|
|
unsigned int crc = 0;
|
||
|
|
int i, j;
|
||
|
|
|
||
|
|
for (j = len; j; j--, data++) {
|
||
|
|
crc ^= (*data << 8);
|
||
|
|
for (i = 8; i; i--) {
|
||
|
|
if (crc & 0x8000)
|
||
|
|
crc ^= (0x1070 << 3);
|
||
|
|
crc <<= 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return (crc >> 8) & 0xff;
|
||
|
|
}
|