1 /* 2 * Copyright 2015 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/arch/soc.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 /* force DDR bus width to 32 bits */ 88 popts->data_bus_width = 1; 89 popts->otf_burst_chop_en = 0; 90 popts->burst_length = DDR_BL8; 91 popts->bstopre = 0; /* enable auto precharge */ 92 /* 93 * Layout optimization results byte mapping 94 * Byte 0 -> Byte ECC 95 * Byte 1 -> Byte 3 96 * Byte 2 -> Byte 2 97 * Byte 3 -> Byte 1 98 * Byte ECC -> Byte 0 99 */ 100 dq_mapping_0 = pdimm[slot].dq_mapping[0]; 101 dq_mapping_2 = pdimm[slot].dq_mapping[2]; 102 dq_mapping_3 = pdimm[slot].dq_mapping[3]; 103 pdimm[slot].dq_mapping[0] = pdimm[slot].dq_mapping[8]; 104 pdimm[slot].dq_mapping[1] = pdimm[slot].dq_mapping[9]; 105 pdimm[slot].dq_mapping[2] = pdimm[slot].dq_mapping[6]; 106 pdimm[slot].dq_mapping[3] = pdimm[slot].dq_mapping[7]; 107 pdimm[slot].dq_mapping[6] = dq_mapping_2; 108 pdimm[slot].dq_mapping[7] = dq_mapping_3; 109 pdimm[slot].dq_mapping[8] = dq_mapping_0; 110 pdimm[slot].dq_mapping[9] = 0; 111 pdimm[slot].dq_mapping[10] = 0; 112 pdimm[slot].dq_mapping[11] = 0; 113 pdimm[slot].dq_mapping[12] = 0; 114 pdimm[slot].dq_mapping[13] = 0; 115 pdimm[slot].dq_mapping[14] = 0; 116 pdimm[slot].dq_mapping[15] = 0; 117 pdimm[slot].dq_mapping[16] = 0; 118 pdimm[slot].dq_mapping[17] = 0; 119 } 120 #endif 121 /* To work at higher than 1333MT/s */ 122 popts->half_strength_driver_enable = 0; 123 /* 124 * Write leveling override 125 */ 126 popts->wrlvl_override = 1; 127 popts->wrlvl_sample = 0x0; /* 32 clocks */ 128 129 /* 130 * Rtt and Rtt_WR override 131 */ 132 popts->rtt_override = 0; 133 134 /* Enable ZQ calibration */ 135 popts->zq_en = 1; 136 137 /* optimize cpo for erratum A-009942 */ 138 popts->cpo_sample = 0x6e; 139 140 if (ddr_freq < 2350) { 141 if (pdimm[0].n_ranks == 2 && pdimm[1].n_ranks == 2) { 142 /* four chip-selects */ 143 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | 144 DDR_CDR1_ODT(DDR_CDR_ODT_80ohm); 145 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm); 146 popts->twot_en = 1; /* enable 2T timing */ 147 } else { 148 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | 149 DDR_CDR1_ODT(DDR_CDR_ODT_60ohm); 150 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_60ohm) | 151 DDR_CDR2_VREF_RANGE_2; 152 } 153 } else { 154 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | 155 DDR_CDR1_ODT(DDR_CDR_ODT_100ohm); 156 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_100ohm) | 157 DDR_CDR2_VREF_RANGE_2; 158 } 159 } 160 161 int fsl_initdram(void) 162 { 163 #if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD) 164 gd->ram_size = fsl_ddr_sdram_size(); 165 #else 166 puts("Initializing DDR....using SPD\n"); 167 168 gd->ram_size = fsl_ddr_sdram(); 169 #endif 170 171 return 0; 172 } 173