1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright 2015 Freescale Semiconductor, Inc. 4 */ 5 6 #include <common.h> 7 #include <fsl_ddr_sdram.h> 8 #include <fsl_ddr_dimm_params.h> 9 #include "ddr.h" 10 #ifdef CONFIG_FSL_DEEP_SLEEP 11 #include <fsl_sleep.h> 12 #endif 13 #include <asm/arch/clock.h> 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 #else 172 173 phys_size_t fixed_sdram(void) 174 { 175 int i; 176 char buf[32]; 177 fsl_ddr_cfg_regs_t ddr_cfg_regs; 178 phys_size_t ddr_size; 179 ulong ddr_freq, ddr_freq_mhz; 180 181 ddr_freq = get_ddr_freq(0); 182 ddr_freq_mhz = ddr_freq / 1000000; 183 184 printf("Configuring DDR for %s MT/s data rate\n", 185 strmhz(buf, ddr_freq)); 186 187 for (i = 0; fixed_ddr_parm_0[i].max_freq > 0; i++) { 188 if ((ddr_freq_mhz > fixed_ddr_parm_0[i].min_freq) && 189 (ddr_freq_mhz <= fixed_ddr_parm_0[i].max_freq)) { 190 memcpy(&ddr_cfg_regs, 191 fixed_ddr_parm_0[i].ddr_settings, 192 sizeof(ddr_cfg_regs)); 193 break; 194 } 195 } 196 197 if (fixed_ddr_parm_0[i].max_freq == 0) 198 panic("Unsupported DDR data rate %s MT/s data rate\n", 199 strmhz(buf, ddr_freq)); 200 201 ddr_size = (phys_size_t)2048 * 1024 * 1024; 202 fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0, 0); 203 204 return ddr_size; 205 } 206 #endif 207 208 int fsl_initdram(void) 209 { 210 phys_size_t dram_size; 211 212 #ifdef CONFIG_SYS_DDR_RAW_TIMING 213 #if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_SPL) 214 puts("Initializing DDR....\n"); 215 dram_size = fsl_ddr_sdram(); 216 #else 217 dram_size = fsl_ddr_sdram_size(); 218 #endif 219 #else 220 #if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_SPL) 221 puts("Initialzing DDR using fixed setting\n"); 222 dram_size = fixed_sdram(); 223 #else 224 gd->ram_size = 0x80000000; 225 226 return 0; 227 #endif 228 #endif 229 erratum_a008850_post(); 230 231 #ifdef CONFIG_FSL_DEEP_SLEEP 232 fsl_dp_ddr_restore(); 233 #endif 234 235 gd->ram_size = dram_size; 236 237 return 0; 238 } 239