1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2016 Freescale Semiconductor, Inc.
4 */
5
6 #include <common.h>
7 #include <fsl_ddr_sdram.h>
8 #include <fsl_ddr_dimm_params.h>
9 #ifdef CONFIG_FSL_DEEP_SLEEP
10 #include <fsl_sleep.h>
11 #endif
12 #include <log.h>
13 #include <asm/arch/clock.h>
14 #include <asm/global_data.h>
15 #include "ddr.h"
16
17 DECLARE_GLOBAL_DATA_PTR;
18
fsl_ddr_board_options(memctl_options_t * popts,dimm_params_t * pdimm,unsigned int ctrl_num)19 void fsl_ddr_board_options(memctl_options_t *popts,
20 dimm_params_t *pdimm,
21 unsigned int ctrl_num)
22 {
23 const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
24 ulong ddr_freq;
25
26 if (ctrl_num > 3) {
27 printf("Not supported controller number %d\n", ctrl_num);
28 return;
29 }
30 if (!pdimm->n_ranks)
31 return;
32
33 pbsp = udimms[0];
34
35 /* Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr
36 * freqency and n_banks specified in board_specific_parameters table.
37 */
38 ddr_freq = get_ddr_freq(0) / 1000000;
39 while (pbsp->datarate_mhz_high) {
40 if (pbsp->n_ranks == pdimm->n_ranks) {
41 if (ddr_freq <= pbsp->datarate_mhz_high) {
42 popts->clk_adjust = pbsp->clk_adjust;
43 popts->wrlvl_start = pbsp->wrlvl_start;
44 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
45 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
46 goto found;
47 }
48 pbsp_highest = pbsp;
49 }
50 pbsp++;
51 }
52
53 if (pbsp_highest) {
54 printf("Error: board specific timing not found for %lu MT/s\n",
55 ddr_freq);
56 printf("Trying to use the highest speed (%u) parameters\n",
57 pbsp_highest->datarate_mhz_high);
58 popts->clk_adjust = pbsp_highest->clk_adjust;
59 popts->wrlvl_start = pbsp_highest->wrlvl_start;
60 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
61 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
62 } else {
63 panic("DIMM is not supported by this board");
64 }
65 found:
66 debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n",
67 pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb);
68
69 popts->data_bus_width = 0; /* 64b data bus */
70 popts->otf_burst_chop_en = 0;
71 popts->burst_length = DDR_BL8;
72 popts->bstopre = 0; /* enable auto precharge */
73
74 popts->half_strength_driver_enable = 0;
75 /*
76 * Write leveling override
77 */
78 popts->wrlvl_override = 1;
79 popts->wrlvl_sample = 0xf;
80
81 /*
82 * Rtt and Rtt_WR override
83 */
84 popts->rtt_override = 0;
85
86 /* Enable ZQ calibration */
87 popts->zq_en = 1;
88
89 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_80ohm);
90 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm) |
91 DDR_CDR2_VREF_TRAIN_EN | DDR_CDR2_VREF_RANGE_2;
92
93 /* optimize cpo for erratum A-009942 */
94 popts->cpo_sample = 0x70;
95 }
96
97 #ifdef CONFIG_TFABOOT
fsl_initdram(void)98 int fsl_initdram(void)
99 {
100 gd->ram_size = tfa_get_dram_size();
101 if (!gd->ram_size)
102 gd->ram_size = fsl_ddr_sdram_size();
103
104 return 0;
105 }
106 #else
fsl_initdram(void)107 int fsl_initdram(void)
108 {
109 phys_size_t dram_size;
110
111 #if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
112 gd->ram_size = fsl_ddr_sdram_size();
113
114 return 0;
115 #else
116 puts("Initializing DDR....using SPD\n");
117
118 dram_size = fsl_ddr_sdram();
119 #endif
120
121 #ifdef CONFIG_FSL_DEEP_SLEEP
122 fsl_dp_ddr_restore();
123 #endif
124
125 erratum_a008850_post();
126
127 gd->ram_size = dram_size;
128
129 return 0;
130 }
131 #endif
132