/* 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; }