LXR uboot/board/freescale/ls1046aqds/ddr.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright 2016 Freescale Semiconductor, Inc.
   4 */
   5
   6#include <common.h>
   7#include <fsl_ddr_sdram.h>
   8#include <fsl_ddr_dimm_params.h>
   9#ifdef CONFIG_FSL_DEEP_SLEEP
  10#include <fsl_sleep.h>
  11#endif
  12#include <asm/arch/clock.h>
  13#include "ddr.h"
  14
  15DECLARE_GLOBAL_DATA_PTR;
  16
  17void fsl_ddr_board_options(memctl_options_t *popts,
  18                           dimm_params_t *pdimm,
  19                           unsigned int ctrl_num)
  20{
  21        const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
  22        ulong ddr_freq;
  23
  24        if (ctrl_num > 3) {
  25                printf("Not supported controller number %d\n", ctrl_num);
  26                return;
  27        }
  28        if (!pdimm->n_ranks)
  29                return;
  30
  31        pbsp = udimms[0];
  32
  33        /* Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr
  34         * freqency and n_banks specified in board_specific_parameters table.
  35         */
  36        ddr_freq = get_ddr_freq(0) / 1000000;
  37        while (pbsp->datarate_mhz_high) {
  38                if (pbsp->n_ranks == pdimm->n_ranks) {
  39                        if (ddr_freq <= pbsp->datarate_mhz_high) {
  40                                popts->clk_adjust = pbsp->clk_adjust;
  41                                popts->wrlvl_start = pbsp->wrlvl_start;
  42                                popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
  43                                popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
  44                                goto found;
  45                        }
  46                        pbsp_highest = pbsp;
  47                }
  48                pbsp++;
  49        }
  50
  51        if (pbsp_highest) {
  52                printf("Error: board specific timing not found for %lu MT/s\n",
  53                       ddr_freq);
  54                printf("Trying to use the highest speed (%u) parameters\n",
  55                       pbsp_highest->datarate_mhz_high);
  56                popts->clk_adjust = pbsp_highest->clk_adjust;
  57                popts->wrlvl_start = pbsp_highest->wrlvl_start;
  58                popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
  59                popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
  60        } else {
  61                panic("DIMM is not supported by this board");
  62        }
  63found:
  64        debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n",
  65              pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb);
  66
  67        popts->data_bus_width = 0;      /* 64b data bus */
  68        popts->otf_burst_chop_en = 0;
  69        popts->burst_length = DDR_BL8;
  70        popts->bstopre = 0;             /* enable auto precharge */
  71
  72        popts->half_strength_driver_enable = 0;
  73        /*
  74         * Write leveling override
  75         */
  76        popts->wrlvl_override = 1;
  77        popts->wrlvl_sample = 0xf;
  78
  79        /*
  80         * Rtt and Rtt_WR override
  81         */
  82        popts->rtt_override = 0;
  83
  84        /* Enable ZQ calibration */
  85        popts->zq_en = 1;
  86
  87        popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_80ohm);
  88        popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm) |
  89                          DDR_CDR2_VREF_TRAIN_EN | DDR_CDR2_VREF_RANGE_2;
  90
  91        /* optimize cpo for erratum A-009942 */
  92        popts->cpo_sample = 0x70;
  93}
  94
  95int fsl_initdram(void)
  96{
  97        phys_size_t dram_size;
  98
  99#if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
 100        gd->ram_size = fsl_ddr_sdram_size();
 101
 102        return 0;
 103#else
 104        puts("Initializing DDR....using SPD\n");
 105
 106        dram_size = fsl_ddr_sdram();
 107#endif
 108
 109#ifdef CONFIG_FSL_DEEP_SLEEP
 110        fsl_dp_ddr_restore();
 111#endif
 112
 113        erratum_a008850_post();
 114
 115        gd->ram_size = dram_size;
 116
 117        return 0;
 118}
 119