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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2014 Freescale Semiconductor, Inc.
*/
#include <common.h>
#include <fsl_ddr_sdram.h>
#include <fsl_ddr_dimm_params.h>
#include <asm/arch/soc.h>
#include <asm/arch/clock.h>
#include "ddr.h"
DECLARE_GLOBAL_DATA_PTR;
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;
if (ctrl_num > 3) {
printf("Not supported controller number %d\n", ctrl_num);
return;
}
if (!pdimm->n_ranks)
return;
/*
* we use identical timing for all slots. If needed, change the code
* to pbsp = rdimms[ctrl_num] or pbsp = udimms[ctrl_num];
*/
if (popts->registered_dimm_en)
pbsp = rdimms[ctrl_num];
else
pbsp = udimms[ctrl_num];
/* Get clk_adjust, wrlvl_start, wrlvl_ctl, 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 for data rate %lu MT/s\n"
"Trying to use the highest speed (%u) parameters\n",
ddr_freq, 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"
"\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, wrlvl_ctrl_3 0x%x\n",
pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb,
pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2,
pbsp->wrlvl_ctl_3);
#ifdef CONFIG_SYS_FSL_HAS_DP_DDR
if (ctrl_num == CONFIG_DP_DDR_CTRL) {
/* force DDR bus width to 32 bits */
popts->data_bus_width = 1;
popts->otf_burst_chop_en = 0;
popts->burst_length = DDR_BL8;
popts->bstopre = 0; /* enable auto precharge */
}
#endif
/*
* Factors to consider for half-strength driver enable:
* - number of DIMMs installed
*/
popts->half_strength_driver_enable = 1;
/*
* 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;
#ifdef CONFIG_SYS_FSL_DDR4
popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_80ohm);
popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm) |
DDR_CDR2_VREF_OVRD(70); /* Vref = 70% */
#else
/* DHC_EN =1, ODT = 75 Ohm */
popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_75ohm);
popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_75ohm);
#endif
}
#ifdef CONFIG_SYS_DDR_RAW_TIMING
dimm_params_t ddr_raw_timing = {
.n_ranks = 2,
.rank_density = 1073741824u,
.capacity = 2147483648,
.primary_sdram_width = 64,
.ec_sdram_width = 0,
.registered_dimm = 0,
.mirrored_dimm = 0,
.n_row_addr = 14,
.n_col_addr = 10,
.n_banks_per_sdram_device = 8,
.edc_config = 0,
.burst_lengths_bitmask = 0x0c,
.tckmin_x_ps = 937,
.caslat_x = 0x6FC << 4, /* 14,13,11,10,9,8,7,6 */
.taa_ps = 13090,
.twr_ps = 15000,
.trcd_ps = 13090,
.trrd_ps = 5000,
.trp_ps = 13090,
.tras_ps = 33000,
.trc_ps = 46090,
.trfc_ps = 160000,
.twtr_ps = 7500,
.trtp_ps = 7500,
.refresh_rate_ps = 7800000,
.tfaw_ps = 25000,
};
int fsl_ddr_get_dimm_params(dimm_params_t *pdimm,
unsigned int controller_number,
unsigned int dimm_number)
{
const char dimm_model[] = "Fixed DDR 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
int fsl_initdram(void)
{
puts("Initializing DDR....");
puts("using SPD\n");
gd->ram_size = fsl_ddr_sdram();
return 0;
}
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