diff options
Diffstat (limited to 'src/mainboard/google/cyan/variants/celes/spd_util.c')
-rw-r--r-- | src/mainboard/google/cyan/variants/celes/spd_util.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/src/mainboard/google/cyan/variants/celes/spd_util.c b/src/mainboard/google/cyan/variants/celes/spd_util.c new file mode 100644 index 0000000000..d6253368e9 --- /dev/null +++ b/src/mainboard/google/cyan/variants/celes/spd_util.c @@ -0,0 +1,66 @@ +/* + * 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 <gpio.h> +#include <soc/gpio.h> +#include <mainboard/google/cyan/spd/spd_util.h> + +/* + * Usage of RAMID straps + * + * RAMID1 - Single/Dual channel configuration + * 0 - Dual channel, 1 - Single channel + * + * Combination of RAMID3, RAMID2, RAMID0 - Index of SPD table + * Index 0 - Samsung K4E8E304EE-EGCE 1600MHz 23nm + * Index 1 - Samsung K4E8E324EB-EGCF 1866MHz 20nm + */ + +uint8_t get_ramid(void) +{ + gpio_t spd_gpios[] = { + GP_SW_80, /* SATA_GP3,RAMID0 */ + GP_SE_02, /* MF_PLT_CLK1, RAMID2 */ + GP_SW_64, /* I2C3_SDA RAMID3 */ + GP_SW_67, /* I2C3_SCL,RAMID1 */ + }; + + return gpio_base2_value(spd_gpios, ARRAY_SIZE(spd_gpios)); +} + +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 celes */ + *dual = ((ram_id > 3) & 0x1) ? 0 : 1; + + /* Display the RAM type */ + printk(BIOS_DEBUG, dual ? "4GiB " : "2GiB "); + switch (spd_index) { + case 0: + printk(BIOS_DEBUG, "Samsung K4E8E304EE-EGCE\n"); + break; + case 1: + printk(BIOS_DEBUG, "Samsung K4E8E324EB-EGCF\n"); + break; + } + + return spd_index; +} |