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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2014 Freescale Semiconductor, Inc.
*/
#include <common.h>
#include <i2c.h>
#include <hwconfig.h>
#include <init.h>
#include <log.h>
#include <asm/global_data.h>
#include <asm/mmu.h>
#include <fsl_ddr_sdram.h>
#include <fsl_ddr_dimm_params.h>
#include <asm/fsl_law.h>
#include <asm/mpc85xx_gpio.h>
#include <linux/delay.h>
DECLARE_GLOBAL_DATA_PTR;
struct board_specific_parameters {
u32 n_ranks;
u32 datarate_mhz_high;
u32 rank_gb;
u32 clk_adjust;
u32 wrlvl_start;
u32 wrlvl_ctl_2;
u32 wrlvl_ctl_3;
};
/*
* datarate_mhz_high values need to be in ascending order
*/
static const struct board_specific_parameters udimm0[] = {
/*
* memory controller 0
* num| hi| rank| clk| wrlvl | wrlvl | wrlvl |
* ranks| mhz| GB |adjst| start | ctl2 | ctl3 |
*/
{2, 833, 0, 8, 6, 0x06060607, 0x08080807,},
{2, 1350, 0, 8, 7, 0x0708080A, 0x0A0B0C09,},
{2, 1666, 0, 8, 7, 0x0808090B, 0x0C0D0E0A,},
{1, 833, 0, 8, 6, 0x06060607, 0x08080807,},
{1, 1350, 0, 8, 7, 0x0708080A, 0x0A0B0C09,},
{1, 1666, 0, 8, 7, 0x0808090B, 0x0C0D0E0A,},
{}
};
static const struct board_specific_parameters *udimms[] = {
udimm0,
};
void fsl_ddr_board_options(memctl_options_t *popts,
dimm_params_t *pdimm,
unsigned int ctrl_num)
{
const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
ulong ddr_freq;
struct cpu_type *cpu = gd->arch.cpu;
if (ctrl_num > 1) {
printf("Not supported controller number %d\n", ctrl_num);
return;
}
if (!pdimm->n_ranks)
return;
pbsp = udimms[0];
/* Get clk_adjust according to the board ddr freqency and n_banks
* specified in board_specific_parameters table.
*/
ddr_freq = get_ddr_freq(0) / 1000000;
while (pbsp->datarate_mhz_high) {
if (pbsp->n_ranks == pdimm->n_ranks &&
(pdimm->rank_density >> 30) >= pbsp->rank_gb) {
if (ddr_freq <= pbsp->datarate_mhz_high) {
popts->clk_adjust = pbsp->clk_adjust;
popts->wrlvl_start = pbsp->wrlvl_start;
popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
goto found;
}
pbsp_highest = pbsp;
}
pbsp++;
}
if (pbsp_highest) {
printf("Error: board specific timing not found\n");
printf("for data rate %lu MT/s\n", ddr_freq);
printf("Trying to use the highest speed (%u) parameters\n",
pbsp_highest->datarate_mhz_high);
popts->clk_adjust = pbsp_highest->clk_adjust;
popts->wrlvl_start = pbsp_highest->wrlvl_start;
popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
} else {
panic("DIMM is not supported by this board");
}
found:
debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n",
pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb);
debug("\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, ",
pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2);
debug("wrlvl_ctrl_3 0x%x\n", pbsp->wrlvl_ctl_3);
/*
* Factors to consider for half-strength driver enable:
* - number of DIMMs installed
*/
popts->half_strength_driver_enable = 0;
/*
* Write leveling override
*/
popts->wrlvl_override = 1;
popts->wrlvl_sample = 0xf;
/*
* rtt and rtt_wr override
*/
popts->rtt_override = 0;
/* Enable ZQ calibration */
popts->zq_en = 1;
/* DHC_EN =1, ODT = 75 Ohm */
popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_OFF);
popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_OFF);
/* T1023 supports max DDR bus 32bit width, T1024 supports DDR 64bit,
* force DDR bus width to 32bit for T1023
*/
if (cpu->soc_ver == SVR_T1023)
popts->data_bus_width = DDR_DATA_BUS_WIDTH_32;
#ifdef CONFIG_FORCE_DDR_DATA_BUS_WIDTH_32
/* for DDR bus 32bit test on T1024 */
popts->data_bus_width = DDR_DATA_BUS_WIDTH_32;
#endif
#ifdef CONFIG_TARGET_T1023RDB
popts->wrlvl_ctl_2 = 0x07070606;
popts->half_strength_driver_enable = 1;
popts->cpo_sample = 0x43;
#elif defined(CONFIG_TARGET_T1024RDB)
/* optimize cpo for erratum A-009942 */
popts->cpo_sample = 0x52;
#endif
}
#ifdef CONFIG_SYS_DDR_RAW_TIMING
/* 2GB discrete DDR4 MT40A512M8HX on T1023RDB */
dimm_params_t ddr_raw_timing = {
.n_ranks = 1,
.rank_density = 0x80000000,
.capacity = 0x80000000,
.primary_sdram_width = 32,
.ec_sdram_width = 8,
.registered_dimm = 0,
.mirrored_dimm = 0,
.n_row_addr = 15,
.n_col_addr = 10,
.bank_addr_bits = 2,
.bank_group_bits = 2,
.edc_config = 0,
.burst_lengths_bitmask = 0x0c,
.tckmin_x_ps = 938,
.tckmax_ps = 1500,
.caslat_x = 0x000DFA00,
.taa_ps = 13500,
.trcd_ps = 13500,
.trp_ps = 13500,
.tras_ps = 33000,
.trc_ps = 46500,
.trfc1_ps = 260000,
.trfc2_ps = 160000,
.trfc4_ps = 110000,
.tfaw_ps = 25000,
.trrds_ps = 3700,
.trrdl_ps = 5300,
.tccdl_ps = 5355,
.refresh_rate_ps = 7800000,
.dq_mapping[0] = 0x0,
.dq_mapping[1] = 0x0,
.dq_mapping[2] = 0x0,
.dq_mapping[3] = 0x0,
.dq_mapping[4] = 0x0,
.dq_mapping[5] = 0x0,
.dq_mapping[6] = 0x0,
.dq_mapping[7] = 0x0,
.dq_mapping[8] = 0x0,
.dq_mapping[9] = 0x0,
.dq_mapping[10] = 0x0,
.dq_mapping[11] = 0x0,
.dq_mapping[12] = 0x0,
.dq_mapping[13] = 0x0,
.dq_mapping[14] = 0x0,
.dq_mapping[15] = 0x0,
.dq_mapping[16] = 0x0,
.dq_mapping[17] = 0x0,
.dq_mapping_ors = 1,
};
int fsl_ddr_get_dimm_params(dimm_params_t *pdimm,
unsigned int controller_number,
unsigned int dimm_number)
{
const char dimm_model[] = "Fixed DDR4 on board";
if (((controller_number == 0) && (dimm_number == 0)) ||
((controller_number == 1) && (dimm_number == 0))) {
memcpy(pdimm, &ddr_raw_timing, sizeof(dimm_params_t));
memset(pdimm->mpart, 0, sizeof(pdimm->mpart));
memcpy(pdimm->mpart, dimm_model, sizeof(dimm_model) - 1);
}
return 0;
}
#endif
#if defined(CONFIG_DEEP_SLEEP)
void board_mem_sleep_setup(void)
{
void __iomem *cpld_base = (void *)CFG_SYS_CPLD_BASE;
/* does not provide HW signals for power management */
clrbits_8(cpld_base + 0x17, 0x40);
/* Disable MCKE isolation */
gpio_set_value(2, 0);
udelay(1);
}
#endif
int dram_init(void)
{
phys_size_t dram_size;
#if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_RAMBOOT_PBL)
#ifndef CONFIG_SYS_DDR_RAW_TIMING
puts("Initializing....using SPD\n");
#endif
dram_size = fsl_ddr_sdram();
#else
/* DDR has been initialised by first stage boot loader */
dram_size = fsl_ddr_sdram_size();
#endif
dram_size = setup_ddr_tlbs(dram_size / 0x100000);
dram_size *= 0x100000;
#if defined(CONFIG_DEEP_SLEEP) && !defined(CONFIG_SPL_BUILD)
fsl_dp_resume();
#endif
gd->ram_size = dram_size;
return 0;
}
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