blob: c75cba71281aba6b9ed1680101b071f1639d2e18 [file] [log] [blame]
/* SPDX-License-Identifier: GPL-2.0-only */
#include <device/dram/common.h>
#include <types.h>
/**
* \brief Calculate the CRC of a DDR SPD data
*
* @param spd pointer to raw SPD data
* @param len length of data in SPD
*
* @return the CRC of the SPD data
*/
u16 ddr_crc16(const u8 *ptr, int n_crc)
{
int i;
u16 crc = 0;
while (--n_crc >= 0) {
crc = crc ^ ((int)*ptr++ << 8);
for (i = 0; i < 8; ++i)
if (crc & 0x8000)
crc = (crc << 1) ^ 0x1021;
else
crc = crc << 1;
}
return crc;
}