variant.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <stdint.h>
#include <string.h>
#include <baseboard/variant.h>
#include <fsp/soc_binding.h>
 
#define K4E6E304EB_MEM_ID       0x5
 
#define MEM_SINGLE_CHAN0        0x0
#define MEM_SINGLE_CHAN3        0x3
#define MEM_SINGLE_CHAN4        0x4
#define MEM_SINGLE_CHAN7        0x7
#define MEM_SINGLE_CHANB        0xb
#define MEM_SINGLE_CHANC        0xc
 
void variant_memory_init_params(FSPM_UPD *mupd, const int spd_index)
{
        FSP_M_CONFIG *mem_cfg;
        mem_cfg = &mupd->FspmConfig;
 
        /* 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 } };
        /* 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 } };
 
        /* Rcomp resistor */
        const u16 RcompResistor[3] = { 200, 81, 162 };
 
        /* Rcomp target */
        const u16 RcompTarget[5] = { 100, 40, 40, 23, 40 };
 
        /*Strengthen the Rcomp Target Ctrl for 8GB K4E6E304EB -EGCF*/
        const u16 StrengthendRcompTarget[5] = { 100, 40, 40, 21, 40 };
 
        /* Default Rcomp Target assignment */
        const u16 *targeted_rcomp = RcompTarget;
 
        /* Override Rcomp Target assignment for specific SKU(s) */
        if (spd_index == K4E6E304EB_MEM_ID)
                targeted_rcomp = StrengthendRcompTarget;
 
        memcpy(mem_cfg->DqByteMapCh0, dq_map[0], sizeof(mem_cfg->DqByteMapCh0));
        memcpy(mem_cfg->DqByteMapCh1, dq_map[1], sizeof(mem_cfg->DqByteMapCh1));
        memcpy(mem_cfg->DqsMapCpu2DramCh0, dqs_map[0], sizeof(mem_cfg->DqsMapCpu2DramCh0));
        memcpy(mem_cfg->DqsMapCpu2DramCh1, dqs_map[1], sizeof(mem_cfg->DqsMapCpu2DramCh1));
        memcpy(mem_cfg->RcompResistor, RcompResistor, sizeof(mem_cfg->RcompResistor));
        memcpy(mem_cfg->RcompTarget, RcompTarget, sizeof(mem_cfg->RcompTarget));
}
 
int is_dual_channel(const int spd_index)
{
        return (spd_index != MEM_SINGLE_CHAN0
                && spd_index != MEM_SINGLE_CHAN3
                && spd_index != MEM_SINGLE_CHAN4
                && spd_index != MEM_SINGLE_CHAN7
                && spd_index != MEM_SINGLE_CHANB
                && spd_index != MEM_SINGLE_CHANC);
}