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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>
/* We use RAM_ID3 to indicate dual channel config.
*
* 0b0000 - 2GiB total - 1 x 2GiB Samsung K4E8E304EE-EGCF 1600MHz
* 0b0001 - 2GiB total - 1 x 2GiB Hynix H9CCNNN8GTMLAR-NUD 1600MHz
* 0b0010 - 2GiB total - 1 x 2GiB micron MT52L256M32D1PF-107 1600MHz
* 0b0011 - 2GiB total - 1 x 2GiB Samsung K4E8E324EB-EGCF 1600MHz
* 0b0100 - 2GiB total - 1 x 2GiB Micron EDF8132A3MA-JD-F 1600MHz
*
* 0b1000 - 4GiB total - 2 x 2GiB Samsung K4E8E304EE-EGCF 1600MHz
* 0b1001 - 4GiB total - 2 x 2GiB Hynix H9CCNNN8GTMLAR-NUD 1600MHz
* 0b1010 - 4GiB total - 2 x 2GiB micron MT52L256M32D1PF-107 1600MHz
* 0b1011 - 4GiB total - 2 x 2GiB Samsung K4E8E324EB-EGCF 1600MHz
* 0b1100 - 4GiB total - 2 x 2GiB Micron EDF8132A3MA-JD-F 1600MHz
*
*/
int get_variant_spd_index(int ram_id, int *dual)
{
int spd_index = ram_id & 0x7;
/* Determine if single or dual channel memory system */
/* RAMID3 is deterministic for reks */
*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-EGCF\n");
break;
case 1:
printk(BIOS_DEBUG, "Hynix H9CCNNN8GTMLAR-NUD\n");
break;
case 2:
printk(BIOS_DEBUG, "Micron MT52L256M32D1PF-107\n");
break;
case 3:
printk(BIOS_DEBUG, "Samsung K4E8E324EB-EGCF\n");
break;
case 4:
printk(BIOS_DEBUG, "Micron EDF8132A3MA-JD-F\n");
break;
}
return spd_index;
}
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