1 /* 2 * Copyright 2016 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 "ddr.h" 11 #ifdef CONFIG_FSL_DEEP_SLEEP 12 #include <fsl_sleep.h> 13 #endif 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 goto found; 45 } 46 pbsp_highest = pbsp; 47 } 48 pbsp++; 49 } 50 51 if (pbsp_highest) { 52 printf("Error: board specific timing not found for %lu MT/s\n", 53 ddr_freq); 54 printf("Trying to use the highest speed (%u) parameters\n", 55 pbsp_highest->datarate_mhz_high); 56 popts->clk_adjust = pbsp_highest->clk_adjust; 57 popts->wrlvl_start = pbsp_highest->wrlvl_start; 58 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2; 59 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3; 60 } else { 61 panic("DIMM is not supported by this board"); 62 } 63 found: 64 debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n", 65 pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb); 66 67 popts->data_bus_width = 0; /* 64-bit data bus */ 68 popts->otf_burst_chop_en = 0; 69 popts->burst_length = DDR_BL8; 70 popts->bstopre = 0; /* enable auto precharge */ 71 72 /* 73 * Factors to consider for half-strength driver enable: 74 * - number of DIMMs installed 75 */ 76 popts->half_strength_driver_enable = 0; 77 /* 78 * Write leveling override 79 */ 80 popts->wrlvl_override = 1; 81 popts->wrlvl_sample = 0xf; 82 83 /* 84 * Rtt and Rtt_WR override 85 */ 86 popts->rtt_override = 0; 87 88 /* Enable ZQ calibration */ 89 popts->zq_en = 1; 90 91 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_80ohm); 92 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm) | 93 DDR_CDR2_VREF_TRAIN_EN | DDR_CDR2_VREF_RANGE_2; 94 95 /* optimize cpo for erratum A-009942 */ 96 popts->cpo_sample = 0x70; 97 } 98 99 int fsl_initdram(void) 100 { 101 phys_size_t dram_size; 102 103 #if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD) 104 return fsl_ddr_sdram_size(); 105 #else 106 puts("Initializing DDR....using SPD\n"); 107 108 dram_size = fsl_ddr_sdram(); 109 #endif 110 111 erratum_a008850_post(); 112 113 gd->ram_size = dram_size; 114 115 return 0; 116 } 117