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/*
* This file is part of the coreboot project.
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _SOC_CANNONLAKE_MEMCFG_INIT_H_
#define _SOC_CANNONLAKE_MEMCFG_INIT_H_
#include <stddef.h>
#include <stdint.h>
#include <fsp/soc_binding.h>
/* Number of dq bits controlled per dqs */
#define DQ_BITS_PER_DQS 8
/* Number of memory DIMM slots available on Cannonlake board */
#define NUM_DIMM_SLOT 4
/*
* Number of memory packages, where a "package" represents a 64-bit solution.
*/
#define DDR_NUM_PACKAGES 2
/* 64-bit Channel identification */
enum {
DDR_CH0,
DDR_CH1,
DDR_NUM_CHANNELS
};
struct spd_by_pointer {
size_t spd_data_len;
uintptr_t spd_data_ptr;
};
enum mem_info_read_type {
NOT_EXISTING, /* No memory in this slot */
READ_SMBUS, /* Read on-module spd by SMBUS. */
READ_SPD_CBFS, /* Find spd file in CBFS. */
READ_SPD_MEMPTR /* Find spd data from pointer. */
};
struct spd_info {
enum mem_info_read_type read_type;
union spd_data_by {
/* To read on-module spd when read_type is READ_SMBUS. */
uint8_t spd_smbus_address;
/* To identify spd file when read_type is READ_SPD_CBFS. */
int spd_index;
/* To find spd data when read_type is READ_SPD_MEMPTR. */
struct spd_by_pointer spd_data_ptr_info;
} spd_spec;
};
/* Board-specific memory dq mapping information */
struct cnl_mb_cfg {
/* Parameters required to access SPD for CH0D0/CH0D1/CH1D0/CH1D1. */
struct spd_info spd[NUM_DIMM_SLOT];
/*
* For each channel, there are 6 sets of DQ byte mappings,
* where each set has a package 0 and a package 1 value (package 0
* represents the first 64-bit lpddr4 chip combination, and package 1
* represents the second 64-bit lpddr4 chip combination).
* The first three sets are for CLK, CMD, and CTL.
* The fsp package actually expects 6 sets, even though the last 3 sets
* are not used in CNL.
* We let the meminit_lpddr4() routine take care of clearing the
* unused fields for the caller.
* Note that dq_map is only used by LPDDR; it does not need to be
* initialized for designs using DDR4.
*/
uint8_t dq_map[DDR_NUM_CHANNELS][6][DDR_NUM_PACKAGES];
/*
* DQS CPU<>DRAM map Ch0 and Ch1. Each array entry represents a
* mapping of a dq bit on the CPU to the bit it's connected to on
* the memory part. The array index represents the dqs bit number
* on the memory part, and the values in the array represent which
* pin on the CPU that DRAM pin connects to.
* dqs_map is only used by LPDDR; same comments apply as for dq_map
* above.
*/
uint8_t dqs_map[DDR_NUM_CHANNELS][DQ_BITS_PER_DQS];
/*
* Rcomp resistor values. These values represent the resistance in
* ohms of the three rcomp resistors attached to the DDR_COMP_0,
* DDR_COMP_1, and DDR_COMP_2 pins on the DRAM.
*/
uint16_t rcomp_resistor[3];
/*
* Rcomp target values. These will typically be the following
* values for Cannon Lake : { 80, 40, 40, 40, 30 }
*/
uint16_t rcomp_targets[5];
/*
* Indicates whether memory is interleaved.
* Set to 1 for an interleaved design,
* set to 0 for non-interleaved design.
*/
uint8_t dq_pins_interleaved;
/*
* VREF_CA configuration.
* Set to 0 VREF_CA goes to both CH_A and CH_B,
* set to 1 VREF_CA goes to CH_A and VREF_DQ_A goes to CH_B,
* set to 2 VREF_CA goes to CH_A and VREF_DQ_B goes to CH_B.
*/
uint8_t vref_ca_config;
/* Early Command Training Enabled */
uint8_t ect;
};
/*
* Initialize default memory configurations for CannonLake.
*/
void cannonlake_memcfg_init(FSP_M_CONFIG *mem_cfg,
const struct cnl_mb_cfg *cnl_cfg);
#endif /* _SOC_CANNONLAKE_MEMCFG_INIT_H_ */
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