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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 Advanced Micro Devices, Inc.
* Copyright (C) 2013 Sage Electronic Engineering, LLC
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <cbfs.h>
#include <console/console.h>
#include <device/dram/ddr3.h>
#include <spd_cache.h>
#include <stdint.h>
#include <string.h>
#define SPD_SIZE 128
#define SPD_CRC_HI 127
#define SPD_CRC_LO 126
int read_spd_from_cbfs(u8 *buf, int idx)
{
const char *spd_file;
size_t spd_file_len = 0;
size_t min_len = (idx + 1) * SPD_SIZE;
printk(BIOS_DEBUG, "read SPD\n");
spd_file = cbfs_get_file_content(CBFS_DEFAULT_MEDIA, "spd.bin", 0xab,
&spd_file_len);
if (!spd_file)
printk(BIOS_EMERG, "file [spd.bin] not found in CBFS");
if (spd_file_len < min_len)
printk(BIOS_EMERG, "Missing SPD data.");
if (!spd_file || spd_file_len < min_len)
return -1;
memcpy(buf, spd_file + (idx * SPD_SIZE), SPD_SIZE);
u16 crc = spd_ddr3_calc_crc(buf, SPD_SIZE);
if (((buf[SPD_CRC_LO] == 0) && (buf[SPD_CRC_HI] == 0))
|| (buf[SPD_CRC_LO] != (crc & 0xff))
|| (buf[SPD_CRC_HI] != (crc >> 8))) {
printk(BIOS_WARNING, "SPD has a invalid or zero-valued CRC\n");
buf[SPD_CRC_LO] = crc & 0xff;
buf[SPD_CRC_HI] = crc >> 8;
u16 i;
printk(BIOS_WARNING, "\nDisplay the SPD");
for (i = 0; i < SPD_SIZE; i++) {
if((i % 16) == 0x00)
printk(BIOS_WARNING, "\n%02x: ", i);
printk(BIOS_WARNING, "%02x ", buf[i]);
}
printk(BIOS_WARNING, "\n");
}
return 0;
}
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