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| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/u-boot/lib/crc8.c | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/u-boot/lib/crc8.c')
| -rw-r--r-- | roms/u-boot/lib/crc8.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/roms/u-boot/lib/crc8.c b/roms/u-boot/lib/crc8.c new file mode 100644 index 000000000..87b87b675 --- /dev/null +++ b/roms/u-boot/lib/crc8.c @@ -0,0 +1,36 @@ +// 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; +} |