spd_util.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <arch/cpu.h>
#include <intelblocks/mp_init.h>
#include <stdint.h>
#include <string.h>
 
#include "../board_id.h"
#include "spd.h"
 
enum icl_dimm_type {
        icl_u_ddr4 = 0,
        icl_u_lpddr4 = 1,
        icl_u_lpddr4_type_3 = 4,
        icl_y_lpddr4 = 6
};
 
void mainboard_fill_dq_map_ch0(void *dq_map_ptr)
{
        /* DQ byte map Ch0 */
        const u8 dq_map[12] = {
                0x0F, 0xF0, 0x0F, 0xF0, 0xFF, 0x00,
                0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
 
        memcpy(dq_map_ptr, dq_map, sizeof(dq_map));
}
 
void mainboard_fill_dq_map_ch1(void *dq_map_ptr)
{
        const u8 dq_map[12] = {
                0x0F, 0xF0, 0x0F, 0xF0, 0xFF, 0x00,
                0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
 
        memcpy(dq_map_ptr, dq_map, sizeof(dq_map));
}
 
static uint8_t get_spd_index(void)
{
        uint8_t spd_index = (get_board_id() & 0x1F) & 0x7;
 
        return spd_index;
}
 
void mainboard_fill_dqs_map_ch0(void *dqs_map_ptr)
{
        /* DQS CPU<>DRAM map Ch0 */
        const u8 dqs_map_u_ddr[8] = { 2, 0, 1, 3, 6, 4, 7, 5 };
        const u8 dqs_map_u_lpddr[8] = { 2, 3, 0, 1, 7, 6, 4, 5 };
        const u8 dqs_map_u_lpddr_type_3[8] = { 2, 3, 1, 0, 7, 6, 4, 5 };
        const u8 dqs_map_y_lpddr[8] = { 0, 1, 2, 3, 4, 5, 6, 7 };
 
        switch (get_spd_index()) {
        case icl_u_ddr4:
                memcpy(dqs_map_ptr, dqs_map_u_ddr, sizeof(dqs_map_u_ddr));
                break;
        case icl_u_lpddr4:
                memcpy(dqs_map_ptr, dqs_map_u_lpddr, sizeof(dqs_map_u_lpddr));
                break;
        case icl_u_lpddr4_type_3:
                memcpy(dqs_map_ptr, dqs_map_u_lpddr_type_3,
                                 sizeof(dqs_map_u_lpddr_type_3));
                break;
        case icl_y_lpddr4:
                memcpy(dqs_map_ptr, dqs_map_y_lpddr, sizeof(dqs_map_y_lpddr));
                break;
        default:
                break;
        }
}
 
void mainboard_fill_dqs_map_ch1(void *dqs_map_ptr)
{
        /* DQS CPU<>DRAM map Ch1 */
        const u8 dqs_map_u_ddr[8] = { 1, 3, 2, 0, 5, 7, 6, 4 };
        const u8 dqs_map_u_lpddr[8] = { 1, 0, 3, 2, 5, 4, 7, 6  };
        const u8 dqs_map_y_lpddr[8] = { 0, 1, 2, 3, 5, 4, 7, 6 };
 
        switch (get_spd_index()) {
        case icl_u_ddr4:
                memcpy(dqs_map_ptr, dqs_map_u_ddr, sizeof(dqs_map_u_ddr));
                break;
        case icl_u_lpddr4:
        case icl_u_lpddr4_type_3:
                memcpy(dqs_map_ptr, dqs_map_u_lpddr, sizeof(dqs_map_u_lpddr));
                break;
        case icl_y_lpddr4:
                memcpy(dqs_map_ptr, dqs_map_y_lpddr, sizeof(dqs_map_y_lpddr));
                break;
        default:
                break;
        }
}
 
void mainboard_fill_rcomp_res_data(void *rcomp_ptr)
{
        /* Rcomp resistor */
        const u16 RcompResistor[3] = { 100, 100, 100 };
        memcpy(rcomp_ptr, RcompResistor, sizeof(RcompResistor));
}
 
void mainboard_fill_rcomp_strength_data(void *rcomp_strength_ptr)
{
        /* Rcomp target */
        static const u16 RcompTarget_DDR4[5] = {
                        100, 33, 32, 33, 28 };
        static const u16 RcompTarget_LPDDR4_Ax[5] = {
                        80, 40, 40, 40, 30 };
        static const u16 RcompTarget_LPDDR4_Bx[5] = {
                        60, 20, 20, 20, 20 };
 
        switch (get_spd_index()) {
        case icl_u_ddr4:
                memcpy(rcomp_strength_ptr, RcompTarget_DDR4,
                                sizeof(RcompTarget_DDR4));
                break;
        case icl_y_lpddr4:
        case icl_u_lpddr4:
        case icl_u_lpddr4_type_3:
                if (cpu_get_cpuid() == CPUID_ICELAKE_A0)
                        memcpy(rcomp_strength_ptr, RcompTarget_LPDDR4_Ax,
                                sizeof(RcompTarget_LPDDR4_Ax));
                else
                        memcpy(rcomp_strength_ptr, RcompTarget_LPDDR4_Bx,
                                sizeof(RcompTarget_LPDDR4_Bx));
                break;
        default:
                break;
        }
}