1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright 2014 Freescale Semiconductor, Inc. 4 */ 5 6 #include <common.h> 7 #include <fsl_ddr_sdram.h> 8 #include <fsl_ddr_dimm_params.h> 9 #include <asm/arch/soc.h> 10 #include <asm/arch/clock.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 /* 30 * we use identical timing for all slots. If needed, change the code 31 * to pbsp = rdimms[ctrl_num] or pbsp = udimms[ctrl_num]; 32 */ 33 if (popts->registered_dimm_en) 34 pbsp = rdimms[ctrl_num]; 35 else 36 pbsp = udimms[ctrl_num]; 37 38 39 /* Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr 40 * freqency and n_banks specified in board_specific_parameters table. 41 */ 42 ddr_freq = get_ddr_freq(0) / 1000000; 43 while (pbsp->datarate_mhz_high) { 44 if (pbsp->n_ranks == pdimm->n_ranks && 45 (pdimm->rank_density >> 30) >= pbsp->rank_gb) { 46 if (ddr_freq <= pbsp->datarate_mhz_high) { 47 popts->clk_adjust = pbsp->clk_adjust; 48 popts->wrlvl_start = pbsp->wrlvl_start; 49 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2; 50 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3; 51 goto found; 52 } 53 pbsp_highest = pbsp; 54 } 55 pbsp++; 56 } 57 58 if (pbsp_highest) { 59 printf("Error: board specific timing not found for data rate %lu MT/s\n" 60 "Trying to use the highest speed (%u) parameters\n", 61 ddr_freq, pbsp_highest->datarate_mhz_high); 62 popts->clk_adjust = pbsp_highest->clk_adjust; 63 popts->wrlvl_start = pbsp_highest->wrlvl_start; 64 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2; 65 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3; 66 } else { 67 panic("DIMM is not supported by this board"); 68 } 69 found: 70 debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n" 71 "\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, wrlvl_ctrl_3 0x%x\n", 72 pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb, 73 pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2, 74 pbsp->wrlvl_ctl_3); 75 #ifdef CONFIG_SYS_FSL_HAS_DP_DDR 76 if (ctrl_num == CONFIG_DP_DDR_CTRL) { 77 /* force DDR bus width to 32 bits */ 78 popts->data_bus_width = 1; 79 popts->otf_burst_chop_en = 0; 80 popts->burst_length = DDR_BL8; 81 popts->bstopre = 0; /* enable auto precharge */ 82 } 83 #endif 84 /* 85 * Factors to consider for half-strength driver enable: 86 * - number of DIMMs installed 87 */ 88 popts->half_strength_driver_enable = 1; 89 /* 90 * Write leveling override 91 */ 92 popts->wrlvl_override = 1; 93 popts->wrlvl_sample = 0xf; 94 95 /* 96 * Rtt and Rtt_WR override 97 */ 98 popts->rtt_override = 0; 99 100 /* Enable ZQ calibration */ 101 popts->zq_en = 1; 102 103 #ifdef CONFIG_SYS_FSL_DDR4 104 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_80ohm); 105 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm) | 106 DDR_CDR2_VREF_OVRD(70); /* Vref = 70% */ 107 #else 108 /* DHC_EN =1, ODT = 75 Ohm */ 109 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_75ohm); 110 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_75ohm); 111 #endif 112 } 113 114 #ifdef CONFIG_SYS_DDR_RAW_TIMING 115 dimm_params_t ddr_raw_timing = { 116 .n_ranks = 2, 117 .rank_density = 1073741824u, 118 .capacity = 2147483648, 119 .primary_sdram_width = 64, 120 .ec_sdram_width = 0, 121 .registered_dimm = 0, 122 .mirrored_dimm = 0, 123 .n_row_addr = 14, 124 .n_col_addr = 10, 125 .n_banks_per_sdram_device = 8, 126 .edc_config = 0, 127 .burst_lengths_bitmask = 0x0c, 128 129 .tckmin_x_ps = 937, 130 .caslat_x = 0x6FC << 4, /* 14,13,11,10,9,8,7,6 */ 131 .taa_ps = 13090, 132 .twr_ps = 15000, 133 .trcd_ps = 13090, 134 .trrd_ps = 5000, 135 .trp_ps = 13090, 136 .tras_ps = 33000, 137 .trc_ps = 46090, 138 .trfc_ps = 160000, 139 .twtr_ps = 7500, 140 .trtp_ps = 7500, 141 .refresh_rate_ps = 7800000, 142 .tfaw_ps = 25000, 143 }; 144 145 int fsl_ddr_get_dimm_params(dimm_params_t *pdimm, 146 unsigned int controller_number, 147 unsigned int dimm_number) 148 { 149 const char dimm_model[] = "Fixed DDR on board"; 150 151 if (((controller_number == 0) && (dimm_number == 0)) || 152 ((controller_number == 1) && (dimm_number == 0))) { 153 memcpy(pdimm, &ddr_raw_timing, sizeof(dimm_params_t)); 154 memset(pdimm->mpart, 0, sizeof(pdimm->mpart)); 155 memcpy(pdimm->mpart, dimm_model, sizeof(dimm_model) - 1); 156 } 157 158 return 0; 159 } 160 #endif 161 162 int fsl_initdram(void) 163 { 164 puts("Initializing DDR...."); 165 166 puts("using SPD\n"); 167 gd->ram_size = fsl_ddr_sdram(); 168 169 return 0; 170 } 171