mirror of
https://github.com/AsahiLinux/u-boot
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137 lines
3.3 KiB
C
137 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2017 NXP
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*/
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#include <common.h>
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#include <fsl_ddr_sdram.h>
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#include <fsl_ddr_dimm_params.h>
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#include <log.h>
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#include <asm/arch/soc.h>
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#include <asm/arch/clock.h>
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#include "ddr.h"
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DECLARE_GLOBAL_DATA_PTR;
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#if defined(CONFIG_VID) && (!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD))
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static void fsl_ddr_setup_0v9_volt(memctl_options_t *popts)
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{
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int vdd;
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vdd = get_core_volt_from_fuse();
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/* Nothing to do for silicons doesn't support VID */
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if (vdd < 0)
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return;
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if (vdd == 900) {
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popts->ddr_cdr1 |= DDR_CDR1_V0PT9_EN;
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debug("VID: configure DDR to support 900 mV\n");
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}
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}
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#endif
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void fsl_ddr_board_options(memctl_options_t *popts,
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dimm_params_t *pdimm,
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unsigned int ctrl_num)
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{
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const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
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ulong ddr_freq;
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if (ctrl_num > 1) {
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printf("Not supported controller number %d\n", ctrl_num);
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return;
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}
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if (!pdimm->n_ranks)
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return;
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/*
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* we use identical timing for all slots. If needed, change the code
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* to pbsp = rdimms[ctrl_num] or pbsp = udimms[ctrl_num];
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*/
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pbsp = udimms[0];
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/* Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr
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* freqency and n_banks specified in board_specific_parameters table.
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*/
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ddr_freq = get_ddr_freq(0) / 1000000;
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while (pbsp->datarate_mhz_high) {
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if (pbsp->n_ranks == pdimm->n_ranks) {
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if (ddr_freq <= pbsp->datarate_mhz_high) {
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popts->clk_adjust = pbsp->clk_adjust;
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popts->wrlvl_start = pbsp->wrlvl_start;
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popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
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popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
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goto found;
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}
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pbsp_highest = pbsp;
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}
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pbsp++;
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}
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if (pbsp_highest) {
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printf("Error: board specific timing not found for %lu MT/s\n",
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ddr_freq);
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printf("Trying to use the highest speed (%u) parameters\n",
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pbsp_highest->datarate_mhz_high);
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popts->clk_adjust = pbsp_highest->clk_adjust;
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popts->wrlvl_start = pbsp_highest->wrlvl_start;
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popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
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popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
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} else {
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panic("DIMM is not supported by this board");
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}
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found:
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debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n"
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"\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, wrlvl_ctrl_3 0x%x\n",
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pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb,
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pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2,
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pbsp->wrlvl_ctl_3);
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popts->half_strength_driver_enable = 0;
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/*
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* Write leveling override
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*/
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popts->wrlvl_override = 1;
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popts->wrlvl_sample = 0xf;
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/* Enable ZQ calibration */
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popts->zq_en = 1;
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/* Enable DDR hashing */
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popts->addr_hash = 1;
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popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_60ohm);
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#if defined(CONFIG_VID) && (!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD))
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fsl_ddr_setup_0v9_volt(popts);
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#endif
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popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_60ohm) |
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DDR_CDR2_VREF_TRAIN_EN | DDR_CDR2_VREF_RANGE_2;
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}
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#ifdef CONFIG_TFABOOT
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int fsl_initdram(void)
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{
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gd->ram_size = tfa_get_dram_size();
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if (!gd->ram_size)
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gd->ram_size = fsl_ddr_sdram_size();
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return 0;
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}
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#else
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int fsl_initdram(void)
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{
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puts("Initializing DDR....using SPD\n");
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#if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
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gd->ram_size = fsl_ddr_sdram_size();
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#else
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gd->ram_size = fsl_ddr_sdram();
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#endif
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return 0;
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}
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#endif /* CONFIG_TFABOOT */
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