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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 Google Inc.
* Copyright (C) 2015 Intel Corp.
* Copyright (C) 2017 Matt DeVillier
*
* 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.
*/
#include <console/console.h>
#include <mainboard/google/cyan/spd/spd_util.h>
/*
* RAMID3 -1: Dual channel SKU, 0: Single channel SKU
* 0b0010 - 2GiB total - 1 x 2GiB Micron EDF8132A3MA-GD-F-R 1600MHz
* 0b0011 - 2GiB total - 1 x 2GiB Micron MT52L256M32D1PF-107WT 1866MHz
* 0b0100 - 2GiB total - 1 x 2GiB Samsung K4E8E304EE-EGCE 1600MHz
* 0b0101 - 2GiB total - 1 x 2GiB Samsung K4E8E324EB-EGCF 1866MHz
*
* 0b1010 - 4GiB total - 2 x 2GiB Micron EDF8132A3MA-GD-F-R 1600MHz
* 0b1011 - 4GiB total - 2 x 2GiB Micron MT52L256M32D1PF-107WT 1866MHz
* 0b1100 - 4GiB total - 2 x 2GiB Samsung K4E8E304EE-EGCE 1600MHz
* 0b1101 - 4GiB total - 2 x 2GiB Samsung K4E8E324EB-EGCF 1866MHz
*/
int get_variant_spd_index(int ram_id, int *dual)
{
int spd_index = ram_id & 0x03;
/* Determine if single or dual channel memory system */
/* RAMID3 is deterministic for terra */
*dual = ((ram_id > 3) & 0x1) ? 1 : 0;
/* Display the RAM type */
printk(BIOS_DEBUG, dual ? "4GiB " : "2GiB ");
switch (spd_index) {
case 0:
printk(BIOS_DEBUG, "Samsung K4E8E304EE-EGCE 1600MHz\n");
break;
case 1:
printk(BIOS_DEBUG, "Samsung K4E8E324EB-EGCF 1866MHz\n");
break;
case 2:
printk(BIOS_DEBUG, "Micron EDF8132A3MA-GD-F-R 1600MHz\n");
break;
case 3:
printk(BIOS_DEBUG, "Micron MT52L256M32D1PF-107WT 1866MHz\n");
break;
}
return spd_index;
}
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