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/* SPDX-License-Identifier: GPL-2.0-only */
#include <cbfs.h>
#include <console/console.h>
#include <soc/pei_data.h>
#include <soc/pei_wrapper.h>
#include <string.h>
#include <types.h>
#define SPD_DRAM_TYPE 2
#define SPD_DRAM_DDR3 0x0b
#define SPD_DRAM_LPDDR3 0xf1
#define SPD_DENSITY_BANKS 4
#define SPD_ADDRESSING 5
#define SPD_ORGANIZATION 7
#define SPD_BUS_DEV_WIDTH 8
#define SPD_PART_OFF 128
#define SPD_PART_LEN 18
#define SPD_LEN 256
static void 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);
}
}
void copy_spd(struct pei_data *pei_data, struct spd_info *spdi)
{
size_t spd_file_len;
uint8_t *spd_file = cbfs_map("spd.bin", &spd_file_len);
printk(BIOS_DEBUG, "SPD index %d\n", spdi->spd_index);
if (!spd_file)
die("SPD data not found.");
if (spd_file_len < SPD_LEN)
die("Missing SPD data.");
if (spd_file_len < ((spdi->spd_index + 1) * SPD_LEN)) {
printk(BIOS_ERR, "SPD index override to 0 - old hardware?\n");
spdi->spd_index = 0;
}
uint8_t *const spd = spd_file + (spdi->spd_index * SPD_LEN);
/* Make sure a valid SPD was found */
if (spd[0] == 0)
die("Invalid SPD data.");
print_spd_info(spd);
for (size_t i = 0; i < ARRAY_SIZE(spdi->addresses); i++) {
if (spdi->addresses[i] == SPD_MEMORY_DOWN)
memcpy(pei_data->spd_data[i / 2][i % 2], spd, SPD_LEN);
}
}
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