board/freescale/ls1021aqds/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 <asm/io.h>
  11 #include "ddr.h"
  12
  13 DECLARE_GLOBAL_DATA_PTR;
  14
  15 void fsl_ddr_board_options(memctl_options_t *popts,
  16                            dimm_params_t *pdimm,
  17                            unsigned int ctrl_num)
  18 {
  19         const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
  20         ulong ddr_freq;
  21
  22         if (ctrl_num > 3) {
  23                 printf("Not supported controller number %d\n", ctrl_num);
  24                 return;
  25         }
  26         if (!pdimm->n_ranks)
  27                 return;
  28
  29         pbsp = udimms[0];
  30
  31         /* Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr
  32          * freqency and n_banks specified in board_specific_parameters table.
  33          */
  34         ddr_freq = get_ddr_freq(0) / 1000000;
  35         while (pbsp->datarate_mhz_high) {
  36                 if (pbsp->n_ranks == pdimm->n_ranks) {
  37                         if (ddr_freq <= pbsp->datarate_mhz_high) {
  38                                 popts->clk_adjust = pbsp->clk_adjust;
  39                                 popts->wrlvl_start = pbsp->wrlvl_start;
  40                                 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
  41                                 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
  42                                 popts->cpo_override = pbsp->cpo_override;
  43                                 popts->write_data_delay =
  44                                         pbsp->write_data_delay;
  45                                 goto found;
  46                         }
  47                         pbsp_highest = pbsp;
  48                 }
  49                 pbsp++;
  50         }
  51
  52         if (pbsp_highest) {
  53                 printf("Error: board specific timing not found for %lu MT/s\n",
  54                        ddr_freq);
  55                 printf("Trying to use the highest speed (%u) parameters\n",
  56                        pbsp_highest->datarate_mhz_high);
  57                 popts->clk_adjust = pbsp_highest->clk_adjust;
  58                 popts->wrlvl_start = pbsp_highest->wrlvl_start;
  59                 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
  60                 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
  61         } else {
  62                 panic("DIMM is not supported by this board");
  63         }
  64 found:
  65         debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n",
  66               pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb);
  67
  68         /* force DDR bus width to 32 bits */
  69         popts->data_bus_width = 1;
  70         popts->otf_burst_chop_en = 0;
  71         popts->burst_length = DDR_BL8;
  72
  73         /*
  74          * Factors to consider for half-strength driver enable:
  75          *      - number of DIMMs installed
  76          */
  77         popts->half_strength_driver_enable = 1;
  78         /*
  79          * Write leveling override
  80          */
  81         popts->wrlvl_override = 1;
  82         popts->wrlvl_sample = 0xf;
  83
  84         /*
  85          * Rtt and Rtt_WR override
  86          */
  87         popts->rtt_override = 0;
  88
  89         /* Enable ZQ calibration */
  90         popts->zq_en = 1;
  91
  92 #ifdef CONFIG_SYS_FSL_DDR4
  93         popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_80ohm);
  94         popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm) |
  95                           DDR_CDR2_VREF_OVRD(70);       /* Vref = 70% */
  96 #else
  97         popts->cswl_override = DDR_CSWL_CS0;
  98
  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 = 1,
 108         .rank_density = 1073741824u,
 109         .capacity = 1073741824u,
 110         .primary_sdram_width = 32,
 111         .ec_sdram_width = 0,
 112         .registered_dimm = 0,
 113         .mirrored_dimm = 0,
 114         .n_row_addr = 15,
 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 = 1071,
 121         .caslat_x = 0xfe << 4,  /* 5,6,7,8 */
 122         .taa_ps = 13125,
 123         .twr_ps = 15000,
 124         .trcd_ps = 13125,
 125         .trrd_ps = 7500,
 126         .trp_ps = 13125,
 127         .tras_ps = 37500,
 128         .trc_ps = 50625,
 129         .trfc_ps = 160000,
 130         .twtr_ps = 7500,
 131         .trtp_ps = 7500,
 132         .refresh_rate_ps = 7800000,
 133         .tfaw_ps = 37500,
 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         static 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
 153 #if defined(CONFIG_DEEP_SLEEP)
 154 void board_mem_sleep_setup(void)
 155 {
 156         void __iomem *qixis_base = (void *)QIXIS_BASE;
 157
 158         /* does not provide HW signals for power management */
 159         clrbits_8(qixis_base + 0x21, 0x2);
 160         udelay(1);
 161 }
 162 #endif
 163
 164 phys_size_t initdram(int board_type)
 165 {
 166         phys_size_t dram_size;
 167
 168 #if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_SPL)
 169         puts("Initializing DDR....using SPD\n");
 170         dram_size = fsl_ddr_sdram();
 171 #else
 172         dram_size =  fsl_ddr_sdram_size();
 173 #endif
 174
 175 #if defined(CONFIG_DEEP_SLEEP) && !defined(CONFIG_SPL_BUILD)
 176         fsl_dp_resume();
 177 #endif
 178
 179         return dram_size;
 180 }
 181
 182 void dram_init_banksize(void)
 183 {
 184         gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
 185         gd->bd->bi_dram[0].size = gd->ram_size;
 186 }