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/*
* Copyright 2017 NXP
*
* SPDX-License-Identifier: GPL-2.0+
*/
#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;
#if defined(CONFIG_VID) && (!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD))
static void fsl_ddr_setup_0v9_volt(memctl_options_t *popts)
{
int vdd;
vdd = get_core_volt_from_fuse();
/* Nothing to do for silicons doesn't support VID */
if (vdd < 0)
return;
if (vdd == 900) {
popts->ddr_cdr1 |= DDR_CDR1_V0PT9_EN;
debug("VID: configure DDR to support 900 mV\n");
}
}
#endif
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 > 1) {
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];
*/
pbsp = udimms[0];
/* 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) {
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 %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"
"\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);
popts->half_strength_driver_enable = 0;
/*
* Write leveling override
*/
popts->wrlvl_override = 1;
popts->wrlvl_sample = 0xf;
/* Enable ZQ calibration */
popts->zq_en = 1;
/* Enable DDR hashing */
popts->addr_hash = 1;
popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_60ohm);
#if defined(CONFIG_VID) && (!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD))
fsl_ddr_setup_0v9_volt(popts);
#endif
popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_60ohm) |
DDR_CDR2_VREF_TRAIN_EN | DDR_CDR2_VREF_RANGE_2;
}
int fsl_initdram(void)
{
puts("Initializing DDR....using SPD\n");
#if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
gd->ram_size = fsl_ddr_sdram_size();
#else
gd->ram_size = fsl_ddr_sdram();
#endif
return 0;
}
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