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 <asm/arch/clock.h> 12 #include "ddr.h" 13 14 DECLARE_GLOBAL_DATA_PTR; 15 16 void fsl_ddr_board_options(memctl_options_t *popts, 17 dimm_params_t *pdimm, 18 unsigned int ctrl_num) 19 { 20 #ifdef CONFIG_SYS_FSL_HAS_DP_DDR 21 u8 dq_mapping_0, dq_mapping_2, dq_mapping_3; 22 #endif 23 const struct board_specific_parameters *pbsp, *pbsp_highest = NULL; 24 ulong ddr_freq; 25 int slot; 26 27 if (ctrl_num > 2) { 28 printf("Not supported controller number %d\n", ctrl_num); 29 return; 30 } 31 32 for (slot = 0; slot < CONFIG_DIMM_SLOTS_PER_CTLR; slot++) { 33 if (pdimm[slot].n_ranks) 34 break; 35 } 36 37 if (slot >= CONFIG_DIMM_SLOTS_PER_CTLR) 38 return; 39 40 /* 41 * we use identical timing for all slots. If needed, change the code 42 * to pbsp = rdimms[ctrl_num] or pbsp = udimms[ctrl_num]; 43 */ 44 if (popts->registered_dimm_en) 45 pbsp = rdimms[ctrl_num]; 46 else 47 pbsp = udimms[ctrl_num]; 48 49 50 /* Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr 51 * freqency and n_banks specified in board_specific_parameters table. 52 */ 53 ddr_freq = get_ddr_freq(ctrl_num) / 1000000; 54 while (pbsp->datarate_mhz_high) { 55 if (pbsp->n_ranks == pdimm[slot].n_ranks && 56 (pdimm[slot].rank_density >> 30) >= pbsp->rank_gb) { 57 if (ddr_freq <= pbsp->datarate_mhz_high) { 58 popts->clk_adjust = pbsp->clk_adjust; 59 popts->wrlvl_start = pbsp->wrlvl_start; 60 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2; 61 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3; 62 goto found; 63 } 64 pbsp_highest = pbsp; 65 } 66 pbsp++; 67 } 68 69 if (pbsp_highest) { 70 printf("Error: board specific timing not found for data rate %lu MT/s\n" 71 "Trying to use the highest speed (%u) parameters\n", 72 ddr_freq, pbsp_highest->datarate_mhz_high); 73 popts->clk_adjust = pbsp_highest->clk_adjust; 74 popts->wrlvl_start = pbsp_highest->wrlvl_start; 75 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2; 76 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3; 77 } else { 78 panic("DIMM is not supported by this board"); 79 } 80 found: 81 debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n" 82 "\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, wrlvl_ctrl_3 0x%x\n", 83 pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb, 84 pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2, 85 pbsp->wrlvl_ctl_3); 86 #ifdef CONFIG_SYS_FSL_HAS_DP_DDR 87 if (ctrl_num == CONFIG_DP_DDR_CTRL) { 88 if (popts->registered_dimm_en) 89 printf("WARN: RDIMM not supported.\n"); 90 /* force DDR bus width to 32 bits */ 91 popts->data_bus_width = 1; 92 popts->otf_burst_chop_en = 0; 93 popts->burst_length = DDR_BL8; 94 popts->bstopre = 0; /* enable auto precharge */ 95 /* 96 * Layout optimization results byte mapping 97 * Byte 0 -> Byte ECC 98 * Byte 1 -> Byte 3 99 * Byte 2 -> Byte 2 100 * Byte 3 -> Byte 1 101 * Byte ECC -> Byte 0 102 */ 103 dq_mapping_0 = pdimm[slot].dq_mapping[0]; 104 dq_mapping_2 = pdimm[slot].dq_mapping[2]; 105 dq_mapping_3 = pdimm[slot].dq_mapping[3]; 106 pdimm[slot].dq_mapping[0] = pdimm[slot].dq_mapping[8]; 107 pdimm[slot].dq_mapping[1] = pdimm[slot].dq_mapping[9]; 108 pdimm[slot].dq_mapping[2] = pdimm[slot].dq_mapping[6]; 109 pdimm[slot].dq_mapping[3] = pdimm[slot].dq_mapping[7]; 110 pdimm[slot].dq_mapping[6] = dq_mapping_2; 111 pdimm[slot].dq_mapping[7] = dq_mapping_3; 112 pdimm[slot].dq_mapping[8] = dq_mapping_0; 113 pdimm[slot].dq_mapping[9] = 0; 114 pdimm[slot].dq_mapping[10] = 0; 115 pdimm[slot].dq_mapping[11] = 0; 116 pdimm[slot].dq_mapping[12] = 0; 117 pdimm[slot].dq_mapping[13] = 0; 118 pdimm[slot].dq_mapping[14] = 0; 119 pdimm[slot].dq_mapping[15] = 0; 120 pdimm[slot].dq_mapping[16] = 0; 121 pdimm[slot].dq_mapping[17] = 0; 122 } 123 #endif 124 /* To work at higher than 1333MT/s */ 125 popts->half_strength_driver_enable = 0; 126 /* 127 * Write leveling override 128 */ 129 popts->wrlvl_override = 1; 130 popts->wrlvl_sample = 0x0; /* 32 clocks */ 131 132 /* 133 * Rtt and Rtt_WR override 134 */ 135 popts->rtt_override = 0; 136 137 /* Enable ZQ calibration */ 138 popts->zq_en = 1; 139 140 /* optimize cpo for erratum A-009942 */ 141 popts->cpo_sample = 0x6e; 142 143 if (ddr_freq < 2350) { 144 if (pdimm[0].n_ranks == 2 && pdimm[1].n_ranks == 2) { 145 /* four chip-selects */ 146 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | 147 DDR_CDR1_ODT(DDR_CDR_ODT_80ohm); 148 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm); 149 popts->twot_en = 1; /* enable 2T timing */ 150 } else { 151 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | 152 DDR_CDR1_ODT(DDR_CDR_ODT_60ohm); 153 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_60ohm) | 154 DDR_CDR2_VREF_RANGE_2; 155 } 156 } else { 157 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | 158 DDR_CDR1_ODT(DDR_CDR_ODT_100ohm); 159 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_100ohm) | 160 DDR_CDR2_VREF_RANGE_2; 161 } 162 } 163 164 int fsl_initdram(void) 165 { 166 #if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD) 167 gd->ram_size = fsl_ddr_sdram_size(); 168 #else 169 puts("Initializing DDR....using SPD\n"); 170 171 gd->ram_size = fsl_ddr_sdram(); 172 #endif 173 174 return 0; 175 } 176