git.sur5r.net Git - u-boot/blob - board/freescale/ls2085a/ddr.c

   1 /*
   2  * Copyright 2014 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
  12 DECLARE_GLOBAL_DATA_PTR;
  13
  14 void fsl_ddr_board_options(memctl_options_t *popts,
  15                                 dimm_params_t *pdimm,
  16                                 unsigned int ctrl_num)
  17 {
  18         const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
  19         ulong ddr_freq;
  20
  21         if (ctrl_num > 3) {
  22                 printf("Not supported controller number %d\n", ctrl_num);
  23                 return;
  24         }
  25         if (!pdimm->n_ranks)
  26                 return;
  27
  28         /*
  29          * we use identical timing for all slots. If needed, change the code
  30          * to  pbsp = rdimms[ctrl_num] or pbsp = udimms[ctrl_num];
  31          */
  32         if (popts->registered_dimm_en)
  33                 pbsp = rdimms[0];
  34         else
  35                 pbsp = udimms[0];
  36
  37
  38         /* Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr
  39          * freqency and n_banks specified in board_specific_parameters table.
  40          */
  41         ddr_freq = get_ddr_freq(0) / 1000000;
  42         while (pbsp->datarate_mhz_high) {
  43                 if (pbsp->n_ranks == pdimm->n_ranks &&
  44                     (pdimm->rank_density >> 30) >= pbsp->rank_gb) {
  45                         if (ddr_freq <= pbsp->datarate_mhz_high) {
  46                                 popts->clk_adjust = pbsp->clk_adjust;
  47                                 popts->wrlvl_start = pbsp->wrlvl_start;
  48                                 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
  49                                 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
  50                                 goto found;
  51                         }
  52                         pbsp_highest = pbsp;
  53                 }
  54                 pbsp++;
  55         }
  56
  57         if (pbsp_highest) {
  58                 printf("Error: board specific timing not found for data rate %lu MT/s\n"
  59                         "Trying to use the highest speed (%u) parameters\n",
  60                         ddr_freq, pbsp_highest->datarate_mhz_high);
  61                 popts->clk_adjust = pbsp_highest->clk_adjust;
  62                 popts->wrlvl_start = pbsp_highest->wrlvl_start;
  63                 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
  64                 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
  65         } else {
  66                 panic("DIMM is not supported by this board");
  67         }
  68 found:
  69         debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n"
  70                 "\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, wrlvl_ctrl_3 0x%x\n",
  71                 pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb,
  72                 pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2,
  73                 pbsp->wrlvl_ctl_3);
  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 #ifdef CONFIG_SYS_FSL_DDR4
  95         popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_80ohm);
  96         popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm) |
  97                           DDR_CDR2_VREF_OVRD(70);       /* Vref = 70% */
  98 #else
  99         /* DHC_EN =1, ODT = 75 Ohm */
 100         popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_75ohm);
 101         popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_75ohm);
 102 #endif
 103 }
 104
 105 #ifdef CONFIG_SYS_DDR_RAW_TIMING
 106 dimm_params_t ddr_raw_timing = {
 107         .n_ranks = 2,
 108         .rank_density = 1073741824u,
 109         .capacity = 2147483648,
 110         .primary_sdram_width = 64,
 111         .ec_sdram_width = 0,
 112         .registered_dimm = 0,
 113         .mirrored_dimm = 0,
 114         .n_row_addr = 14,
 115         .n_col_addr = 10,
 116         .n_banks_per_sdram_device = 8,
 117         .edc_config = 0,
 118         .burst_lengths_bitmask = 0x0c,
 119
 120         .tckmin_x_ps = 937,
 121         .caslat_x = 0x6FC << 4,  /* 14,13,11,10,9,8,7,6 */
 122         .taa_ps = 13090,
 123         .twr_ps = 15000,
 124         .trcd_ps = 13090,
 125         .trrd_ps = 5000,
 126         .trp_ps = 13090,
 127         .tras_ps = 33000,
 128         .trc_ps = 46090,
 129         .trfc_ps = 160000,
 130         .twtr_ps = 7500,
 131         .trtp_ps = 7500,
 132         .refresh_rate_ps = 7800000,
 133         .tfaw_ps = 25000,
 134 };
 135
 136 int fsl_ddr_get_dimm_params(dimm_params_t *pdimm,
 137                 unsigned int controller_number,
 138                 unsigned int dimm_number)
 139 {
 140         const char dimm_model[] = "Fixed DDR on board";
 141
 142         if (((controller_number == 0) && (dimm_number == 0)) ||
 143             ((controller_number == 1) && (dimm_number == 0))) {
 144                 memcpy(pdimm, &ddr_raw_timing, sizeof(dimm_params_t));
 145                 memset(pdimm->mpart, 0, sizeof(pdimm->mpart));
 146                 memcpy(pdimm->mpart, dimm_model, sizeof(dimm_model) - 1);
 147         }
 148
 149         return 0;
 150 }
 151 #endif
 152 phys_size_t initdram(int board_type)
 153 {
 154         phys_size_t dram_size;
 155
 156         puts("Initializing DDR....");
 157
 158         puts("using SPD\n");
 159         dram_size = fsl_ddr_sdram();
 160
 161         return dram_size;
 162 }
 163
 164 void dram_init_banksize(void)
 165 {
 166         gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
 167         if (gd->ram_size > CONFIG_SYS_LS2_DDR_BLOCK1_SIZE) {
 168                 gd->bd->bi_dram[0].size = CONFIG_SYS_LS2_DDR_BLOCK1_SIZE;
 169                 gd->bd->bi_dram[1].start = CONFIG_SYS_DDR_BLOCK2_BASE;
 170                 gd->bd->bi_dram[1].size = gd->ram_size -
 171                                           CONFIG_SYS_LS2_DDR_BLOCK1_SIZE;
 172         } else {
 173                 gd->bd->bi_dram[0].size = gd->ram_size;
 174         }
 175 }