u-boot/board/freescale/ls2080ardb/ddr.c
York Sun 58932ec68c armv8: ls2088ardb: Add 3DS RDIMM support
Tested with MTA72ASS8G72PSZ-2S6G1. This is 3DS RDIMM module with x4
DDR chips. LS2088ARDB needs to be modified to connect all DQS signals.
Some of them are grounded by default for x8 chips. Tested with RDIMM
MTA18ASF2G72PDZ on main memory controllers. DP-DDR doesn't support
RDIMM. Dropped related timing table.

Signed-off-by: York Sun <york.sun@nxp.com>
2018-01-30 09:14:07 -08:00

175 lines
4.8 KiB
C

/*
* 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) {
if (popts->registered_dimm_en)
printf("WARN: RDIMM not supported.\n");
/* 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;
}