spd_util.c

Go to the documentation of this file.

/* SPDX-License-Identifier: GPL-2.0-only */
#include <cbfs.h>
#include <console/console.h>
#include <stdint.h>
#include <string.h>
#include "boardid.h"
#include "spd.h"
 
void mainboard_fill_dq_map_data(void *dq_map_ch0, void *dq_map_ch1)
{
        /* DQ byte map */
        const u8 dq_map[2][12] = {
                  { 0x0F, 0xF0, 0x00, 0xF0, 0x0F, 0xF0,
                    0x0F, 0x00, 0xFF, 0x00, 0xFF, 0x00 },
                  { 0x0F, 0xF0, 0x00, 0xF0, 0x0F, 0xF0,
                    0x0F, 0x00, 0xFF, 0x00, 0xFF, 0x00 } };
        memcpy(dq_map_ch0, dq_map[0], sizeof(dq_map[0]));
        memcpy(dq_map_ch1, dq_map[1], sizeof(dq_map[1]));
}
 
void mainboard_fill_dqs_map_data(void *dqs_map_ch0, void *dqs_map_ch1)
{
        /* DQS CPU<>DRAM map */
        const u8 dqs_map[2][8] = {
                { 0, 1, 3, 2, 6, 5, 4, 7 },
                { 2, 3, 0, 1, 6, 7, 4, 5 } };
        memcpy(dqs_map_ch0, dqs_map[0], sizeof(dqs_map[0]));
        memcpy(dqs_map_ch1, dqs_map[1], sizeof(dqs_map[1]));
}
 
void mainboard_fill_rcomp_res_data(void *rcomp_ptr)
{
        /* Rcomp resistor */
        const u16 RcompResistor[3] = { 200, 81, 162 };
        memcpy(rcomp_ptr, RcompResistor,
                 sizeof(RcompResistor));
}
 
void mainboard_fill_rcomp_strength_data(void *rcomp_strength_ptr)
{
        int mem_cfg_id;
 
        mem_cfg_id = get_spd_index();
        /* Rcomp target */
        static const u16 RcompTarget[5] = {
                100, 40, 40, 23, 40 };
 
        /* Strengthen the Rcomp Target Ctrl for 8GB K4E6E304EE -EGCF */
        static const u16 StrengthendRcompTarget[5] = {
                100, 40, 40, 21, 40 };
 
        if (mem_cfg_id == K4E6E304EE_MEM_ID) {
                memcpy(rcomp_strength_ptr, StrengthendRcompTarget,
                        sizeof(StrengthendRcompTarget));
        } else {
                memcpy(rcomp_strength_ptr, RcompTarget, sizeof(RcompTarget));
        }
 
}
 
uintptr_t mainboard_get_spd_data(void)
{
        char *spd_file;
        int spd_index, spd_span;
        size_t spd_file_len;
 
        spd_index = get_spd_index();
        printk(BIOS_INFO, "SPD index %d\n", spd_index);
 
        /* Load SPD data from CBFS */
        spd_file = cbfs_map("spd.bin", &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 0 - old hardware?\n");
                spd_index = 0;
        }
 
        spd_span = spd_index * SPD_LEN;
        return (uintptr_t)(spd_file + spd_span);
}
 
int mainboard_has_dual_channel_mem(void)
{
        int spd_index;
 
        spd_index = get_spd_index();
 
        if (spd_index != HYNIX_SINGLE_CHAN && spd_index != SAMSUNG_SINGLE_CHAN
                && spd_index != MIC_SINGLE_CHAN) {
                printk(BIOS_INFO,
                        "Dual channel SPD detected writing second channel\n");
                return 1;
        }
        return 0;
}