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/*
* Copyright 2015 Freescale Semiconductor, Inc.
*
* 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;
void fsl_ddr_board_options(memctl_options_t *popts,
dimm_params_t *pdimm,
unsigned int ctrl_num)
{
#ifdef CONFIG_SYS_FSL_HAS_DP_DDR
u8 dq_mapping_0, dq_mapping_2, dq_mapping_3;
#endif
const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
ulong ddr_freq;
int slot;
if (ctrl_num > 2) {
printf("Not supported controller number %d\n", ctrl_num);
return;
}
for (slot = 0; slot < CONFIG_DIMM_SLOTS_PER_CTLR; slot++) {
if (pdimm[slot].n_ranks)
break;
}
if (slot >= CONFIG_DIMM_SLOTS_PER_CTLR)
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(ctrl_num) / 1000000;
while (pbsp->datarate_mhz_high) {
if (pbsp->n_ranks == pdimm[slot].n_ranks &&
(pdimm[slot].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 */
/*
* Layout optimization results byte mapping
* Byte 0 -> Byte ECC
* Byte 1 -> Byte 3
* Byte 2 -> Byte 2
* Byte 3 -> Byte 1
* Byte ECC -> Byte 0
*/
dq_mapping_0 = pdimm[slot].dq_mapping[0];
dq_mapping_2 = pdimm[slot].dq_mapping[2];
dq_mapping_3 = pdimm[slot].dq_mapping[3];
pdimm[slot].dq_mapping[0] = pdimm[slot].dq_mapping[8];
pdimm[slot].dq_mapping[1] = pdimm[slot].dq_mapping[9];
pdimm[slot].dq_mapping[2] = pdimm[slot].dq_mapping[6];
pdimm[slot].dq_mapping[3] = pdimm[slot].dq_mapping[7];
pdimm[slot].dq_mapping[6] = dq_mapping_2;
pdimm[slot].dq_mapping[7] = dq_mapping_3;
pdimm[slot].dq_mapping[8] = dq_mapping_0;
pdimm[slot].dq_mapping[9] = 0;
pdimm[slot].dq_mapping[10] = 0;
pdimm[slot].dq_mapping[11] = 0;
pdimm[slot].dq_mapping[12] = 0;
pdimm[slot].dq_mapping[13] = 0;
pdimm[slot].dq_mapping[14] = 0;
pdimm[slot].dq_mapping[15] = 0;
pdimm[slot].dq_mapping[16] = 0;
pdimm[slot].dq_mapping[17] = 0;
}
#endif
/* To work at higher than 1333MT/s */
popts->half_strength_driver_enable = 0;
/*
* Write leveling override
*/
popts->wrlvl_override = 1;
popts->wrlvl_sample = 0x0; /* 32 clocks */
/*
* Rtt and Rtt_WR override
*/
popts->rtt_override = 0;
/* Enable ZQ calibration */
popts->zq_en = 1;
/* optimize cpo for erratum A-009942 */
popts->cpo_sample = 0x6e;
if (ddr_freq < 2350) {
if (pdimm[0].n_ranks == 2 && pdimm[1].n_ranks == 2) {
/* four chip-selects */
popts->ddr_cdr1 = DDR_CDR1_DHC_EN |
DDR_CDR1_ODT(DDR_CDR_ODT_80ohm);
popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm);
popts->twot_en = 1; /* enable 2T timing */
} else {
popts->ddr_cdr1 = DDR_CDR1_DHC_EN |
DDR_CDR1_ODT(DDR_CDR_ODT_60ohm);
popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_60ohm) |
DDR_CDR2_VREF_RANGE_2;
}
} else {
popts->ddr_cdr1 = DDR_CDR1_DHC_EN |
DDR_CDR1_ODT(DDR_CDR_ODT_100ohm);
popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_100ohm) |
DDR_CDR2_VREF_RANGE_2;
}
}
int fsl_initdram(void)
{
#if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
gd->ram_size = fsl_ddr_sdram_size();
#else
puts("Initializing DDR....using SPD\n");
gd->ram_size = fsl_ddr_sdram();
#endif
return 0;
}
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