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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2016 Google Inc.
* Copyright (C) 2016 Intel Corporation
*
* 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 <gpio.h>
#include <soc/gpio.h>
#include <soc/romstage.h>
#include <string.h>
#include "../gpio.h"
#include "spd.h"
static void mainboard_print_spd_info(uint8_t spd[])
{
const int spd_banks[8] = { 8, 16, 32, 64, -1, -1, -1, -1 };
const int spd_capmb[8] = { 1, 2, 4, 8, 16, 32, 64, 0 };
const int spd_rows[8] = { 12, 13, 14, 15, 16, -1, -1, -1 };
const int spd_cols[8] = { 9, 10, 11, 12, -1, -1, -1, -1 };
const int spd_ranks[8] = { 1, 2, 3, 4, -1, -1, -1, -1 };
const int spd_devw[8] = { 4, 8, 16, 32, -1, -1, -1, -1 };
const int spd_busw[8] = { 8, 16, 32, 64, -1, -1, -1, -1 };
char spd_name[SPD_PART_LEN+1] = { 0 };
int banks = spd_banks[(spd[SPD_DENSITY_BANKS] >> 4) & 7];
int capmb = spd_capmb[spd[SPD_DENSITY_BANKS] & 7] * 256;
int rows = spd_rows[(spd[SPD_ADDRESSING] >> 3) & 7];
int cols = spd_cols[spd[SPD_ADDRESSING] & 7];
int ranks = spd_ranks[(spd[SPD_ORGANIZATION] >> 3) & 7];
int devw = spd_devw[spd[SPD_ORGANIZATION] & 7];
int busw = spd_busw[spd[SPD_BUS_DEV_WIDTH] & 7];
/* Module type */
printk(BIOS_INFO, "SPD: module type is ");
switch (spd[SPD_DRAM_TYPE]) {
case SPD_DRAM_DDR3:
printk(BIOS_INFO, "DDR3\n");
break;
case SPD_DRAM_LPDDR3:
printk(BIOS_INFO, "LPDDR3\n");
break;
default:
printk(BIOS_INFO, "Unknown (%02x)\n", spd[SPD_DRAM_TYPE]);
break;
}
/* Module Part Number */
memcpy(spd_name, &spd[SPD_PART_OFF], SPD_PART_LEN);
spd_name[SPD_PART_LEN] = 0;
printk(BIOS_INFO, "SPD: module part is %s\n", spd_name);
printk(BIOS_INFO,
"SPD: banks %d, ranks %d, rows %d, columns %d, density %d Mb\n",
banks, ranks, rows, cols, capmb);
printk(BIOS_INFO, "SPD: device width %d bits, bus width %d bits\n",
devw, busw);
if (capmb > 0 && busw > 0 && devw > 0 && ranks > 0) {
/* SIZE = DENSITY / 8 * BUS_WIDTH / SDRAM_WIDTH * RANKS */
printk(BIOS_INFO, "SPD: module size is %u MB (per channel)\n",
capmb / 8 * busw / devw * ranks);
}
}
int mainboard_get_spd_index(void)
{
gpio_t spd_gpios[] = {
GPIO_MEM_CONFIG_0,
GPIO_MEM_CONFIG_1,
GPIO_MEM_CONFIG_2,
GPIO_MEM_CONFIG_3,
};
return gpio_base2_value(spd_gpios, ARRAY_SIZE(spd_gpios));
}
uintptr_t mainboard_get_spd_data(void)
{
char *spd_file;
size_t spd_file_len;
int spd_index;
spd_index = mainboard_get_spd_index();
printk(BIOS_INFO, "SPD index %d\n", spd_index);
/* Load SPD data from CBFS */
spd_file = cbfs_boot_map_with_leak("spd.bin", CBFS_TYPE_SPD,
&spd_file_len);
if (!spd_file)
die("SPD data not found.");
/* make sure we have at least one SPD in the file. */
if (spd_file_len < SPD_LEN)
die("Missing SPD data.");
/* Make sure we did not overrun the buffer */
if (spd_file_len < ((spd_index + 1) * SPD_LEN)) {
printk(BIOS_ERR, "SPD index override to 1 - old hardware?\n");
spd_index = 1;
}
spd_index *= SPD_LEN;
mainboard_print_spd_info((uint8_t *)(spd_file + spd_index));
return (uintptr_t)(spd_file + spd_index);
}
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