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/* SPDX-License-Identifier: GPL-2.0-only */
#include <cbfs.h>
#include <cbmem.h>
#include <console/console.h>
#include <gpio.h>
#include <lib.h>
#include <memory_info.h>
#include <smbios.h>
#include <spd.h>
#include <soc/romstage.h>
#include <string.h>
#include <spd_bin.h>
#include "spd_util.h"
__weak uint8_t get_ramid(void)
{
gpio_t spd_gpios[] = {
GP_SW_80, /* SATA_GP3, RAMID0 */
GP_SW_67, /* I2C3_SCL, RAMID1 */
GP_SE_02, /* MF_PLT_CLK1, RAMID2 */
GP_SW_64, /* I2C3_SDA, RAMID3 */
};
return gpio_base2_value(spd_gpios, ARRAY_SIZE(spd_gpios));
}
static void *get_spd_pointer(int *dual)
{
char *spd_file;
size_t spd_file_len;
int total_spds;
int ram_id = 0;
int spd_index = 0;
/* Find the SPD data in CBFS. */
spd_file = cbfs_map("spd.bin", &spd_file_len);
if (!spd_file)
die("SPD data not found.");
if (spd_file_len < SPD_PAGE_LEN)
die("Missing SPD data.");
total_spds = spd_file_len / SPD_PAGE_LEN;
ram_id = get_ramid();
printk(BIOS_DEBUG, "ram_id=%d, total_spds: %d\n", ram_id, total_spds);
spd_index = get_variant_spd_index(ram_id, dual);
if (spd_index >= total_spds) {
printk(BIOS_ERR, "SPD index > total SPDs\n");
return NULL;
}
/* Return the serial product data for the RAM */
return &spd_file[SPD_PAGE_LEN * spd_index];
}
/* Copy SPD data for on-board memory */
void spd_memory_init_params(MEMORY_INIT_UPD *memory_params)
{
void *spd_content;
int dual_channel = 0;
/*
* 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(&dual_channel);
if (CONFIG(DISPLAY_SPD_DATA) && spd_content != NULL) {
printk(BIOS_DEBUG, "SPD Data:\n");
hexdump(spd_content, SPD_PAGE_LEN);
printk(BIOS_DEBUG, "\n");
}
/*
* Set SPD and memory configuration:
* Memory type: 0=DimmInstalled,
* 1=SolderDownMemory,
* 2=DimmDisabled
*/
if (spd_content != NULL) {
memory_params->PcdMemChannel0Config = 1;
printk(BIOS_DEBUG, "Channel 0 DIMM soldered down\n");
if (dual_channel) {
printk(BIOS_DEBUG, "Channel 1 DIMM soldered down\n");
memory_params->PcdMemChannel1Config = 1;
} else {
printk(BIOS_DEBUG, "Channel 1 DIMM not installed\n");
memory_params->PcdMemChannel1Config = 2;
}
}
/* Update SPD data */
if (CONFIG(BOARD_GOOGLE_CYAN)) {
memory_params->PcdMemoryTypeEnable = MEM_DDR3;
memory_params->PcdMemorySpdPtr = (uintptr_t)spd_content;
} else {
memory_params->PcdMemoryTypeEnable = MEM_LPDDR3;
}
}
static void set_dimm_info(const uint8_t *spd, struct dimm_info *dimm)
{
const int spd_capmb[8] = { 1, 2, 4, 8, 16, 32, 64, 0 };
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 };
int capmb = spd_capmb[spd[SPD_DENSITY_BANKS] & 7] * 256;
int ranks = spd_ranks[(spd[DDR3_ORGANIZATION] >> 3) & 7];
int devw = spd_devw[spd[DDR3_ORGANIZATION] & 7];
int busw = spd_busw[spd[DDR3_BUS_DEV_WIDTH] & 7];
void *hob_list_ptr;
EFI_HOB_GUID_TYPE *hob_ptr;
FSP_SMBIOS_MEMORY_INFO *memory_info_hob;
const EFI_GUID memory_info_hob_guid = FSP_SMBIOS_MEMORY_INFO_GUID;
/* Locate the memory info HOB, presence validated by raminit */
hob_list_ptr = fsp_get_hob_list();
hob_ptr = get_guid_hob(&memory_info_hob_guid, hob_list_ptr);
if (hob_ptr != NULL) {
memory_info_hob = (FSP_SMBIOS_MEMORY_INFO *)(hob_ptr + 1);
dimm->ddr_frequency = memory_info_hob->MemoryFrequencyInMHz;
} else {
printk(BIOS_ERR, "Can't get memory info hob pointer\n");
dimm->ddr_frequency = 0;
}
/* Parse the SPD data to determine the DIMM information */
if (CONFIG(BOARD_GOOGLE_CYAN)) {
dimm->ddr_type = MEMORY_TYPE_DDR3;
} else {
dimm->ddr_type = MEMORY_TYPE_LPDDR3;
}
dimm->dimm_size = capmb / 8 * busw / devw * ranks; /* MiB */
dimm->mod_type = spd[3] & 0xf;
strncpy((char *)&dimm->module_part_number[0], (char *)&spd[0x80],
LPDDR3_SPD_PART_LEN);
dimm->module_part_number[LPDDR3_SPD_PART_LEN] = 0;
dimm->mod_id = *(uint16_t *)&spd[0x94];
switch (busw) {
default:
case 8:
dimm->bus_width = MEMORY_BUS_WIDTH_8;
break;
case 16:
dimm->bus_width = MEMORY_BUS_WIDTH_16;
break;
case 32:
dimm->bus_width = MEMORY_BUS_WIDTH_32;
break;
case 64:
dimm->bus_width = MEMORY_BUS_WIDTH_64;
break;
}
}
void mainboard_save_dimm_info(struct romstage_params *params)
{
const void *spd_content;
int dual_channel;
struct dimm_info *dimm;
struct memory_info *mem_info;
spd_content = get_spd_pointer(&dual_channel);
if (spd_content == NULL)
return;
/*
* Allocate CBMEM area for DIMM information used to populate SMBIOS
* table 17
*/
mem_info = cbmem_add(CBMEM_ID_MEMINFO, sizeof(*mem_info));
printk(BIOS_DEBUG, "CBMEM entry for DIMM info: %p\n", mem_info);
if (mem_info == NULL)
return;
memset(mem_info, 0, sizeof(*mem_info));
/* Describe the first channel memory */
dimm = &mem_info->dimm[0];
set_dimm_info(spd_content, dimm);
mem_info->dimm_cnt = 1;
/* Describe the second channel memory */
if (dual_channel) {
dimm = &mem_info->dimm[1];
set_dimm_info(spd_content, dimm);
dimm->channel_num = 1;
mem_info->dimm_cnt = 2;
}
}
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