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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 Google Inc.
* Copyright (C) 2015 Intel Corp.
*
* 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 <cbfs.h>
#include <console/console.h>
#include <lib.h>
#include <soc/gpio.h>
#include <soc/romstage.h>
#include <string.h>
#define SPD_SIZE 256
#define SATA_GP3_PAD_CFG0 0x5828
#define I2C3_SCL_PAD_CFG0 0x5438
#define MF_PLT_CLK1_PAD_CFG0 0x4410
#define I2C3_SDA_PAD_CFG0 0x5420
/*
* 0b0000 - 4GiB total - 2 x 2GiB Samsung K4B4G1646Q-HYK0 1600MHz
* 0b0001 - 4GiB total - 2 x 2GiB Hynix H5TC4G63CFR-PBA 1600MHz
* 0b0010- 2GiB total - 1 x 2GiB Samsung K4B4G1646Q-HYK0 1600MHz
* 0b0011 - 2GiB total - 1 x 2GiB Hynix H5TC4G63CFR-PBA 1600MHz
*/
static const uint32_t dual_channel_config = (1 << 0);
static void *get_spd_pointer(char *spd_file_content, int total_spds, int *dual)
{
int ram_id = 0;
ram_id |= get_gpio(COMMUNITY_GPSOUTHWEST_BASE, SATA_GP3_PAD_CFG0) << 0;
ram_id |= get_gpio(COMMUNITY_GPSOUTHWEST_BASE, I2C3_SCL_PAD_CFG0) << 1;
ram_id |= get_gpio(COMMUNITY_GPSOUTHEAST_BASE, MF_PLT_CLK1_PAD_CFG0)
<< 2;
ram_id |= get_gpio(COMMUNITY_GPSOUTHWEST_BASE, I2C3_SDA_PAD_CFG0) << 3;
/*
* There are only 2 SPDs supported on Cyan Board:
* Samsung 4G:0000 & Hynix 2G:0011
*/
/*
* RAMID0 on the first boot does not read the correct value,so checking
* bit 1 is enough as WA
*/
if (ram_id > 0)
ram_id = 3;
printk(BIOS_DEBUG, "ram_id=%d, total_spds: %d\n", ram_id, total_spds);
if (ram_id >= total_spds)
return NULL;
/* Single channel configs */
if (dual_channel_config & (1 << ram_id))
*dual = 1;
return &spd_file_content[SPD_SIZE * ram_id];
}
/* Copy SPD data for on-board memory */
void mainboard_fill_spd_data(struct pei_data *ps)
{
char *spd_file;
size_t spd_file_len;
void *spd_content;
int dual_channel = 0;
/* Find the SPD data in CBFS. */
spd_file = cbfs_boot_map_with_leak("spd.bin", CBFS_TYPE_SPD,
&spd_file_len);
if (!spd_file)
die("SPD data not found.");
if (spd_file_len < SPD_SIZE)
die("Missing SPD data.");
/*
* Both channels are always present in SPD data. Always use matched
* DIMMs so use the same SPD data for each DIMM.
*/
spd_content = get_spd_pointer(spd_file,
spd_file_len / SPD_SIZE,
&dual_channel);
if (IS_ENABLED(CONFIG_DISPLAY_SPD_DATA) && spd_content != NULL) {
printk(BIOS_DEBUG, "SPD Data:\n");
hexdump(spd_content, SPD_SIZE);
printk(BIOS_DEBUG, "\n");
}
/*
* Set SPD and memory configuration:
* Memory type: 0=DimmInstalled,
* 1=SolderDownMemory,
* 2=DimmDisabled
*/
if (spd_content != NULL) {
ps->spd_data_ch0 = spd_content;
ps->spd_ch0_config = 1;
if (dual_channel) {
ps->spd_data_ch1 = spd_content;
ps->spd_ch1_config = 1;
} else {
ps->spd_ch1_config = 2;
}
}
}
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