board/freescale/ls1043ardb/ddr.c

   1 /*
   2  * Copyright 2015 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <fsl_ddr_sdram.h>
   9 #include <fsl_ddr_dimm_params.h>
  10 #include "ddr.h"
  11 #ifdef CONFIG_FSL_DEEP_SLEEP
  12 #include <fsl_sleep.h>
  13 #endif
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16
  17 void 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 > 1) {
  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                                 popts->cpo_override = pbsp->cpo_override;
  45                                 popts->write_data_delay =
  46                                         pbsp->write_data_delay;
  47                                 goto found;
  48                         }
  49                         pbsp_highest = pbsp;
  50                 }
  51                 pbsp++;
  52         }
  53
  54         if (pbsp_highest) {
  55                 printf("Error: board specific timing not found for %lu MT/s\n",
  56                        ddr_freq);
  57                 printf("Trying to use the highest speed (%u) parameters\n",
  58                        pbsp_highest->datarate_mhz_high);
  59                 popts->clk_adjust = pbsp_highest->clk_adjust;
  60                 popts->wrlvl_start = pbsp_highest->wrlvl_start;
  61                 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
  62                 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
  63         } else {
  64                 panic("DIMM is not supported by this board");
  65         }
  66 found:
  67         debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n",
  68               pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb);
  69
  70         /* force DDR bus width to 32 bits */
  71         popts->data_bus_width = 1;
  72         popts->otf_burst_chop_en = 0;
  73         popts->burst_length = DDR_BL8;
  74
  75         /*
  76          * Factors to consider for half-strength driver enable:
  77          *      - number of DIMMs installed
  78          */
  79         popts->half_strength_driver_enable = 1;
  80         /*
  81          * Write leveling override
  82          */
  83         popts->wrlvl_override = 1;
  84         popts->wrlvl_sample = 0xf;
  85
  86         /*
  87          * Rtt and Rtt_WR override
  88          */
  89         popts->rtt_override = 0;
  90
  91         /* Enable ZQ calibration */
  92         popts->zq_en = 1;
  93
  94         /* optimize cpo for erratum A-009942 */
  95         popts->cpo_sample = 0x46;
  96
  97         popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_80ohm);
  98         popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm) |
  99                           DDR_CDR2_VREF_OVRD(70);       /* Vref = 70% */
 100 }
 101
 102 /* DDR model number: MT40A512M8HX-093E */
 103 #ifdef CONFIG_SYS_DDR_RAW_TIMING
 104 dimm_params_t ddr_raw_timing = {
 105         .n_ranks = 1,
 106         .rank_density = 2147483648u,
 107         .capacity = 2147483648u,
 108         .primary_sdram_width = 32,
 109         .ec_sdram_width = 0,
 110         .registered_dimm = 0,
 111         .mirrored_dimm = 0,
 112         .n_row_addr = 15,
 113         .n_col_addr = 10,
 114         .bank_addr_bits = 0,
 115         .bank_group_bits = 2,
 116         .edc_config = 0,
 117         .burst_lengths_bitmask = 0x0c,
 118
 119         .tckmin_x_ps = 938,
 120         .tckmax_ps = 1500,
 121         .caslat_x = 0x000DFA00,
 122         .taa_ps = 13500,
 123         .trcd_ps = 13500,
 124         .trp_ps = 13500,
 125         .tras_ps = 33000,
 126         .trc_ps = 46500,
 127         .trfc1_ps = 260000,
 128         .trfc2_ps = 160000,
 129         .trfc4_ps = 110000,
 130         .tfaw_ps = 21000,
 131         .trrds_ps = 3700,
 132         .trrdl_ps = 5300,
 133         .tccdl_ps = 5355,
 134         .refresh_rate_ps = 7800000,
 135         .dq_mapping[0] = 0x0,
 136         .dq_mapping[1] = 0x0,
 137         .dq_mapping[2] = 0x0,
 138         .dq_mapping[3] = 0x0,
 139         .dq_mapping[4] = 0x0,
 140         .dq_mapping[5] = 0x0,
 141         .dq_mapping[6] = 0x0,
 142         .dq_mapping[7] = 0x0,
 143         .dq_mapping[8] = 0x0,
 144         .dq_mapping[9] = 0x0,
 145         .dq_mapping[10] = 0x0,
 146         .dq_mapping[11] = 0x0,
 147         .dq_mapping[12] = 0x0,
 148         .dq_mapping[13] = 0x0,
 149         .dq_mapping[14] = 0x0,
 150         .dq_mapping[15] = 0x0,
 151         .dq_mapping[16] = 0x0,
 152         .dq_mapping[17] = 0x0,
 153         .dq_mapping_ors = 0,
 154 };
 155
 156 int fsl_ddr_get_dimm_params(dimm_params_t *pdimm,
 157                             unsigned int controller_number,
 158                             unsigned int dimm_number)
 159 {
 160         static const char dimm_model[] = "Fixed DDR on board";
 161
 162         if (((controller_number == 0) && (dimm_number == 0)) ||
 163             ((controller_number == 1) && (dimm_number == 0))) {
 164                 memcpy(pdimm, &ddr_raw_timing, sizeof(dimm_params_t));
 165                 memset(pdimm->mpart, 0, sizeof(pdimm->mpart));
 166                 memcpy(pdimm->mpart, dimm_model, sizeof(dimm_model) - 1);
 167         }
 168
 169         return 0;
 170 }
 171 #endif
 172
 173 int initdram(void)
 174 {
 175         phys_size_t dram_size;
 176
 177 #if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_SPL)
 178         puts("Initializing DDR....\n");
 179         dram_size = fsl_ddr_sdram();
 180 #else
 181         dram_size =  fsl_ddr_sdram_size();
 182 #endif
 183         erratum_a008850_post();
 184
 185 #ifdef CONFIG_FSL_DEEP_SLEEP
 186         fsl_dp_ddr_restore();
 187 #endif
 188
 189         gd->ram_size = dram_size;
 190
 191         return 0;
 192 }