/* SPDX-License-Identifier: GPL-2.0-only */

#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;
}
