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 <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 #ifdef CONFIG_SYS_FSL_HAS_DP_DDR 20 u8 dq_mapping_0, dq_mapping_2, dq_mapping_3; 21 #endif 22 const struct board_specific_parameters *pbsp, *pbsp_highest = NULL; 23 ulong ddr_freq; 24 int slot; 25 26 if (ctrl_num > 2) { 27 printf("Not supported controller number %d\n", ctrl_num); 28 return; 29 } 30 31 for (slot = 0; slot < CONFIG_DIMM_SLOTS_PER_CTLR; slot++) { 32 if (pdimm[slot].n_ranks) 33 break; 34 } 35 36 if (slot >= CONFIG_DIMM_SLOTS_PER_CTLR) 37 return; 38 39 /* 40 * we use identical timing for all slots. If needed, change the code 41 * to pbsp = rdimms[ctrl_num] or pbsp = udimms[ctrl_num]; 42 */ 43 if (popts->registered_dimm_en) 44 pbsp = rdimms[ctrl_num]; 45 else 46 pbsp = udimms[ctrl_num]; 47 48 49 /* Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr 50 * freqency and n_banks specified in board_specific_parameters table. 51 */ 52 ddr_freq = get_ddr_freq(ctrl_num) / 1000000; 53 while (pbsp->datarate_mhz_high) { 54 if (pbsp->n_ranks == pdimm[slot].n_ranks && 55 (pdimm[slot].rank_density >> 30) >= pbsp->rank_gb) { 56 if (ddr_freq <= pbsp->datarate_mhz_high) { 57 popts->clk_adjust = pbsp->clk_adjust; 58 popts->wrlvl_start = pbsp->wrlvl_start; 59 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2; 60 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3; 61 goto found; 62 } 63 pbsp_highest = pbsp; 64 } 65 pbsp++; 66 } 67 68 if (pbsp_highest) { 69 printf("Error: board specific timing not found for data rate %lu MT/s\n" 70 "Trying to use the highest speed (%u) parameters\n", 71 ddr_freq, pbsp_highest->datarate_mhz_high); 72 popts->clk_adjust = pbsp_highest->clk_adjust; 73 popts->wrlvl_start = pbsp_highest->wrlvl_start; 74 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2; 75 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3; 76 } else { 77 panic("DIMM is not supported by this board"); 78 } 79 found: 80 debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n" 81 "\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, wrlvl_ctrl_3 0x%x\n", 82 pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb, 83 pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2, 84 pbsp->wrlvl_ctl_3); 85 #ifdef CONFIG_SYS_FSL_HAS_DP_DDR 86 if (ctrl_num == CONFIG_DP_DDR_CTRL) { 87 if (popts->registered_dimm_en) 88 printf("WARN: RDIMM not supported.\n"); 89 /* force DDR bus width to 32 bits */ 90 popts->data_bus_width = 1; 91 popts->otf_burst_chop_en = 0; 92 popts->burst_length = DDR_BL8; 93 popts->bstopre = 0; /* enable auto precharge */ 94 /* 95 * Layout optimization results byte mapping 96 * Byte 0 -> Byte ECC 97 * Byte 1 -> Byte 3 98 * Byte 2 -> Byte 2 99 * Byte 3 -> Byte 1 100 * Byte ECC -> Byte 0 101 */ 102 dq_mapping_0 = pdimm[slot].dq_mapping[0]; 103 dq_mapping_2 = pdimm[slot].dq_mapping[2]; 104 dq_mapping_3 = pdimm[slot].dq_mapping[3]; 105 pdimm[slot].dq_mapping[0] = pdimm[slot].dq_mapping[8]; 106 pdimm[slot].dq_mapping[1] = pdimm[slot].dq_mapping[9]; 107 pdimm[slot].dq_mapping[2] = pdimm[slot].dq_mapping[6]; 108 pdimm[slot].dq_mapping[3] = pdimm[slot].dq_mapping[7]; 109 pdimm[slot].dq_mapping[6] = dq_mapping_2; 110 pdimm[slot].dq_mapping[7] = dq_mapping_3; 111 pdimm[slot].dq_mapping[8] = dq_mapping_0; 112 pdimm[slot].dq_mapping[9] = 0; 113 pdimm[slot].dq_mapping[10] = 0; 114 pdimm[slot].dq_mapping[11] = 0; 115 pdimm[slot].dq_mapping[12] = 0; 116 pdimm[slot].dq_mapping[13] = 0; 117 pdimm[slot].dq_mapping[14] = 0; 118 pdimm[slot].dq_mapping[15] = 0; 119 pdimm[slot].dq_mapping[16] = 0; 120 pdimm[slot].dq_mapping[17] = 0; 121 } 122 #endif 123 /* To work at higher than 1333MT/s */ 124 popts->half_strength_driver_enable = 0; 125 /* 126 * Write leveling override 127 */ 128 popts->wrlvl_override = 1; 129 popts->wrlvl_sample = 0x0; /* 32 clocks */ 130 131 /* 132 * Rtt and Rtt_WR override 133 */ 134 popts->rtt_override = 0; 135 136 /* Enable ZQ calibration */ 137 popts->zq_en = 1; 138 139 /* optimize cpo for erratum A-009942 */ 140 popts->cpo_sample = 0x6e; 141 142 if (ddr_freq < 2350) { 143 if (pdimm[0].n_ranks == 2 && pdimm[1].n_ranks == 2) { 144 /* four chip-selects */ 145 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | 146 DDR_CDR1_ODT(DDR_CDR_ODT_80ohm); 147 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm); 148 popts->twot_en = 1; /* enable 2T timing */ 149 } else { 150 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | 151 DDR_CDR1_ODT(DDR_CDR_ODT_60ohm); 152 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_60ohm) | 153 DDR_CDR2_VREF_RANGE_2; 154 } 155 } else { 156 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | 157 DDR_CDR1_ODT(DDR_CDR_ODT_100ohm); 158 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_100ohm) | 159 DDR_CDR2_VREF_RANGE_2; 160 } 161 } 162 163 int fsl_initdram(void) 164 { 165 #if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD) 166 gd->ram_size = fsl_ddr_sdram_size(); 167 #else 168 puts("Initializing DDR....using SPD\n"); 169 170 gd->ram_size = fsl_ddr_sdram(); 171 #endif 172 173 return 0; 174 } 175