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60d18d3fe9
Add an implementation of the CRC8 algorithm. This is required by the TPM emulation, but is probably useful to U-Boot in general. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Simon Glass <sjg@chromium.org>
26 lines
411 B
C
26 lines
411 B
C
/*
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* Copyright (c) 2013 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include "linux/crc8.h"
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unsigned int crc8(const unsigned char *vptr, int len)
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{
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const unsigned char *data = vptr;
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unsigned int crc = 0;
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int i, j;
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for (j = len; j; j--, data++) {
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crc ^= (*data << 8);
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for (i = 8; i; i--) {
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if (crc & 0x8000)
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crc ^= (0x1070 << 3);
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crc <<= 1;
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}
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}
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return (crc >> 8) & 0xff;
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}
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