1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright 2012 Freescale Semiconductor, Inc.
10 #include <fsl_ddr_sdram.h>
11 #include <fsl_ddr_dimm_params.h>
12 #include <asm/fsl_law.h>
15 DECLARE_GLOBAL_DATA_PTR;
17 void fsl_ddr_board_options(memctl_options_t *popts,
19 unsigned int ctrl_num)
21 const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
25 printf("Not supported controller number %d\n", ctrl_num);
32 * we use identical timing for all slots. If needed, change the code
33 * to pbsp = rdimms[ctrl_num] or pbsp = udimms[ctrl_num];
35 if (popts->registered_dimm_en)
41 /* Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr
42 * freqency and n_banks specified in board_specific_parameters table.
44 ddr_freq = get_ddr_freq(0) / 1000000;
45 while (pbsp->datarate_mhz_high) {
46 if (pbsp->n_ranks == pdimm->n_ranks &&
47 (pdimm->rank_density >> 30) >= pbsp->rank_gb) {
48 if (ddr_freq <= pbsp->datarate_mhz_high) {
49 popts->cpo_override = pbsp->cpo;
50 popts->write_data_delay =
51 pbsp->write_data_delay;
52 popts->clk_adjust = pbsp->clk_adjust;
53 popts->wrlvl_start = pbsp->wrlvl_start;
54 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
55 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
56 popts->twot_en = pbsp->force_2t;
65 printf("Error: board specific timing not found "
66 "for data rate %lu MT/s\n"
67 "Trying to use the highest speed (%u) parameters\n",
68 ddr_freq, pbsp_highest->datarate_mhz_high);
69 popts->cpo_override = pbsp_highest->cpo;
70 popts->write_data_delay = pbsp_highest->write_data_delay;
71 popts->clk_adjust = pbsp_highest->clk_adjust;
72 popts->wrlvl_start = pbsp_highest->wrlvl_start;
73 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
74 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
75 popts->twot_en = pbsp_highest->force_2t;
77 panic("DIMM is not supported by this board");
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, "
82 "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,
88 * Factors to consider for half-strength driver enable:
89 * - number of DIMMs installed
91 popts->half_strength_driver_enable = 0;
93 * Write leveling override
95 popts->wrlvl_override = 1;
96 popts->wrlvl_sample = 0xf;
99 * Rtt and Rtt_WR override
101 popts->rtt_override = 0;
103 /* Enable ZQ calibration */
106 /* DHC_EN =1, ODT = 75 Ohm */
107 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_75ohm);
108 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_75ohm);
110 /* optimize cpo for erratum A-009942 */
111 popts->cpo_sample = 0x63;
116 phys_size_t dram_size;
118 puts("Initializing....using SPD\n");
120 #if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_RAMBOOT_PBL)
121 dram_size = fsl_ddr_sdram();
123 /* DDR has been initialised by first stage boot loader */
124 dram_size = fsl_ddr_sdram_size();
126 dram_size = setup_ddr_tlbs(dram_size / 0x100000);
127 dram_size *= 0x100000;
129 gd->ram_size = dram_size;