spd_util.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <console/console.h>
#include <gpio.h>
#include <soc/gpio.h>
#include <mainboard/google/cyan/spd/spd_util.h>
 
/*
 *   0b0000 - 4GiB total - 2 x 2GiB Samsung K4E8E304EE-EGCF
 *   0b0001 - 2GiB total - 1 x 2GiB Samsung K4E8E304EE-EGCF
 *   0b0010 - 4GiB total - 2 x 2GiB Hynix H9CCNNN8GTMLAR-NUD
 *   0b0011 - 2GiB total - 1 x 2GiB Hynix H9CCNNN8GTMLAR-NUD
 *   0b0100 - 4GiB total - 2 x 2GiB Micron MT52L256M32D1PF-107
 *   0b0101 - 2GiB total - 1 x 2GiB Micron MT52L256M32D1PF-107
 *   0b0110 - 2GiB total - 1 x 2GiB Samsung K4E8E324EB-EGCF
 *   0b0111 - 4GiB total - 2 x 2GiB Samsung K4E8E324EB-EGCF
 *   0b1000 - 2GiB total - 1 x 2GiB Hynix H9CCNNN8GTALAR-NUD
 *   0b1001 - 4GiB total - 2 x 4GiB Hynix H9CCNNN8GTALAR-NUD
 */
 
static const uint32_t dual_channel_config =
        (1 << 0) | (1 << 2) | (1 << 4) | (1 << 7) | (1 << 9);
 
uint8_t get_ramid(void)
{
        gpio_t spd_gpios[] = {
                GP_SW_64,       /* I2C3_SDA, RAMID0 */
                GP_SE_02,   /* MF_PLT_CLK1, RAMID1 */
                GP_SW_67,       /* I2C3_SCL, RAMID2 */
                GP_SW_80,       /* SATA_GP3, RAMID3 */
        };
 
        return gpio_base2_value(spd_gpios, ARRAY_SIZE(spd_gpios));
}
 
int get_variant_spd_index(int ram_id, int *dual)
{
        /* Determine if single or dual channel memory system */
        *dual = (dual_channel_config & (1 << ram_id)) ? 1 : 0;
 
        /* Display the RAM type */
        switch (ram_id) {
        case 0:
                printk(BIOS_DEBUG, "4GiB Samsung K4E8E304EE-EGCF\n");
                break;
        case 1:
                printk(BIOS_DEBUG, "2GiB Samsung K4E8E304EE-EGCF\n");
                break;
        case 2:
                printk(BIOS_DEBUG, "4GiB Hynix H9CCNNN8GTMLAR-NUD\n");
                break;
        case 3:
                printk(BIOS_DEBUG, "2GiB Hynix H9CCNNN8GTMLAR-NUD\n");
                break;
        case 4:
                printk(BIOS_DEBUG, "4GiB Micron MT52L256M32D1PF-107\n");
                break;
        case 5:
                printk(BIOS_DEBUG, "2GiB Micron MT52L256M32D1PF-107\n");
                break;
        case 6:
                printk(BIOS_DEBUG, "2GiB Samsung K4E8E324EB-EGCF\n");
                break;
        case 7:
                printk(BIOS_DEBUG, "4GiB Samsung K4E8E324EB-EGCF\n");
                break;
        case 8:
                printk(BIOS_DEBUG, "2GiB Hynix H9CCNNN8GTALAR-NUD\n");
                break;
        case 9:
                printk(BIOS_DEBUG, "4GiB Hynix H9CCNNN8GTALAR-NUD\n");
                break;
        }
 
        /* 1:1 mapping between ram_id and spd_index for setzer */
        return ram_id;
}