1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2015 Freescale Semiconductor, Inc.
7 #include <fsl_ddr_sdram.h>
8 #include <fsl_ddr_dimm_params.h>
10 #include <asm/arch/soc.h>
11 #include <asm/arch/clock.h>
14 DECLARE_GLOBAL_DATA_PTR;
16 void fsl_ddr_board_options(memctl_options_t *popts,
18 unsigned int ctrl_num)
20 #ifdef CONFIG_SYS_FSL_HAS_DP_DDR
21 u8 dq_mapping_0, dq_mapping_2, dq_mapping_3;
23 const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
28 printf("Not supported controller number %d\n", ctrl_num);
32 for (slot = 0; slot < CONFIG_DIMM_SLOTS_PER_CTLR; slot++) {
33 if (pdimm[slot].n_ranks)
37 if (slot >= CONFIG_DIMM_SLOTS_PER_CTLR)
41 * we use identical timing for all slots. If needed, change the code
42 * to pbsp = rdimms[ctrl_num] or pbsp = udimms[ctrl_num];
44 if (popts->registered_dimm_en)
45 pbsp = rdimms[ctrl_num];
47 pbsp = udimms[ctrl_num];
50 /* Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr
51 * freqency and n_banks specified in board_specific_parameters table.
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;
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;
78 panic("DIMM is not supported by this board");
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,
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 */
96 * Layout optimization results byte mapping
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;
124 /* To work at higher than 1333MT/s */
125 popts->half_strength_driver_enable = 0;
127 * Write leveling override
129 popts->wrlvl_override = 1;
130 popts->wrlvl_sample = 0x0; /* 32 clocks */
133 * Rtt and Rtt_WR override
135 popts->rtt_override = 0;
137 /* Enable ZQ calibration */
140 /* optimize cpo for erratum A-009942 */
141 popts->cpo_sample = 0x6e;
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 */
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;
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;
164 #ifdef CONFIG_TFABOOT
165 int fsl_initdram(void)
167 gd->ram_size = tfa_get_dram_size();
170 gd->ram_size = fsl_ddr_sdram_size();
175 int fsl_initdram(void)
177 #if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
178 gd->ram_size = fsl_ddr_sdram_size();
180 puts("Initializing DDR....using SPD\n");
182 gd->ram_size = fsl_ddr_sdram();
187 #endif /* CONFIG_TFABOOT */