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/*
* This file is part of the coreboot project.
*
* Copyright 2017 Google Inc.
*
* 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.
*/
#include <baseboard/variants.h>
#include <baseboard/gpio.h>
#include <compiler.h>
#include <gpio.h>
#include <soc/cnl_memcfg_init.h>
static const struct cnl_mb_cfg baseboard_lpddr4_cfg = {
.dq_map[DDR_CH0] = {
/*
* CLK0 goes to package 0 - Bytes[3:0],
* CLK1 goes to package 1 - Bytes[7:4]
*/
{ 0x0F, 0xF0 },
/*
* Cmd CAA goes to Bytes[3:0],
* Cmd CAB goes to Bytes[7:4]
*/
{ 0x0F, 0xF0 },
/* CTL (CS) goes to all bytes */
{ 0xFF, 0x00 },
},
.dq_map[DDR_CH1] = {
/*
* CLK0 goes to package 0 - Bytes[3:0],
* CLK1 goes to package 1 - Bytes[7:4]
*/
{ 0x0F, 0xF0 },
/*
* Cmd CAA goes to Bytes[3:0],
* Cmd CAB goes to Bytes[7:4]
*/
{ 0x0F, 0xF0 },
/* CTL (CS) goes to all bytes */
{ 0xFF, 0x00 },
},
/*
* The dqs_map arrays map the lpddr4 pins to the SoC pins
* for both channels.
*
* the index = pin number on lpddr4 part
* the value = pin number on SoC
*/
.dqs_map[DDR_CH0] = { 3, 1, 2, 0, 7, 5, 6, 4 },
.dqs_map[DDR_CH1] = { 3, 2, 0, 1, 7, 5, 6, 4 },
/* Baseboard uses three 100 Ohm rcomp resistors */
.rcomp_resistor = { 100, 100, 100 },
/*
* Baseboard Rcomp target values.
* Rcomp targets for baseboard should be
* { 80, 40, 40, 40, 30 }, but we need to
* nil out rcomp targets for now to avoid bug b:70896346
*/
.rcomp_targets = { 0, 0, 0, 0, 0 },
/* Baseboard is a non-interleaved design */
.dq_pins_interleaved = 0,
/* Disable Early Command Training */
.ect = 0,
};
const struct cnl_mb_cfg *__weak variant_lpddr4_config(void)
{
return &baseboard_lpddr4_cfg;
}
size_t __weak variant_memory_sku(void)
{
const gpio_t pads[] = {
[3] = GPIO_MEM_CONFIG_3, [2] = GPIO_MEM_CONFIG_2,
[1] = GPIO_MEM_CONFIG_1, [0] = GPIO_MEM_CONFIG_0,
};
return gpio_base2_value(pads, ARRAY_SIZE(pads));
}
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