1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/*
* Copyright 2015 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <fsl_ddr_sdram.h>
#include <fsl_ddr_dimm_params.h>
#include <asm/arch/soc.h>
#include <asm/arch/clock.h>
#include "ddr.h"
DECLARE_GLOBAL_DATA_PTR;
void fsl_ddr_board_options(memctl_options_t *popts,
dimm_params_t *pdimm,
unsigned int ctrl_num)
{
#ifdef CONFIG_SYS_FSL_HAS_DP_DDR
u8 dq_mapping_0, dq_mapping_2, dq_mapping_3;
#endif
const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
ulong ddr_freq;
int slot;
if (ctrl_num > 2) {
printf("Not supported controller number %d\n", ctrl_num);
return;
}
for (slot = 0; slot < CONFIG_DIMM_SLOTS_PER_CTLR; slot++) {
if (pdimm[slot].n_ranks)
break;
}
if (slot >= CONFIG_DIMM_SLOTS_PER_CTLR)
return;
/*
* we use identical timing for all slots. If needed, change the code
* to pbsp = rdimms[ctrl_num] or pbsp = udimms[ctrl_num];
*/
if (popts->registered_dimm_en)
pbsp = rdimms[ctrl_num];
else
pbsp = udimms[ctrl_num];
/* Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr
* freqency and n_banks specified in board_specific_parameters table.
*/
ddr_freq = get_ddr_freq(ctrl_num) / 1000000;
while (pbsp->datarate_mhz_high) {
if (pbsp->n_ranks == pdimm[slot].n_ranks &&
(pdimm[slot].rank_density >> 30) >= pbsp->rank_gb) {
if (ddr_freq <= pbsp->datarate_mhz_high) {
popts->clk_adjust = pbsp->clk_adjust;
popts->wrlvl_start = pbsp->wrlvl_start;
popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
goto found;
}
pbsp_highest = pbsp;
}
pbsp++;
}
if (pbsp_highest) {
printf("Error: board specific timing not found for data rate %lu MT/s\n"
"Trying to use the highest speed (%u) parameters\n",
ddr_freq, pbsp_highest->datarate_mhz_high);
popts->clk_adjust = pbsp_highest->clk_adjust;
popts->wrlvl_start = pbsp_highest->wrlvl_start;
popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
} else {
panic("DIMM is not supported by this board");
}
found:
debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n"
"\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, wrlvl_ctrl_3 0x%x\n",
pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb,
pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2,
pbsp->wrlvl_ctl_3);
#ifdef CONFIG_SYS_FSL_HAS_DP_DDR
if (ctrl_num == CONFIG_DP_DDR_CTRL) {
/* force DDR bus width to 32 bits */
popts->data_bus_width = 1;
popts->otf_burst_chop_en = 0;
popts->burst_length = DDR_BL8;
popts->bstopre = 0; /* enable auto precharge */
/*
* Layout optimization results byte mapping
* Byte 0 -> Byte ECC
* Byte 1 -> Byte 3
* Byte 2 -> Byte 2
* Byte 3 -> Byte 1
* Byte ECC -> Byte 0
*/
dq_mapping_0 = pdimm[slot].dq_mapping[0];
dq_mapping_2 = pdimm[slot].dq_mapping[2];
dq_mapping_3 = pdimm[slot].dq_mapping[3];
pdimm[slot].dq_mapping[0] = pdimm[slot].dq_mapping[8];
pdimm[slot].dq_mapping[1] = pdimm[slot].dq_mapping[9];
pdimm[slot].dq_mapping[2] = pdimm[slot].dq_mapping[6];
pdimm[slot].dq_mapping[3] = pdimm[slot].dq_mapping[7];
pdimm[slot].dq_mapping[6] = dq_mapping_2;
pdimm[slot].dq_mapping[7] = dq_mapping_3;
pdimm[slot].dq_mapping[8] = dq_mapping_0;
pdimm[slot].dq_mapping[9] = 0;
pdimm[slot].dq_mapping[10] = 0;
pdimm[slot].dq_mapping[11] = 0;
pdimm[slot].dq_mapping[12] = 0;
pdimm[slot].dq_mapping[13] = 0;
pdimm[slot].dq_mapping[14] = 0;
pdimm[slot].dq_mapping[15] = 0;
pdimm[slot].dq_mapping[16] = 0;
pdimm[slot].dq_mapping[17] = 0;
}
#endif
/* To work at higher than 1333MT/s */
popts->half_strength_driver_enable = 0;
/*
* Write leveling override
*/
popts->wrlvl_override = 1;
popts->wrlvl_sample = 0x0; /* 32 clocks */
/*
* Rtt and Rtt_WR override
*/
popts->rtt_override = 0;
/* Enable ZQ calibration */
popts->zq_en = 1;
if (ddr_freq < 2350) {
if (pdimm[0].n_ranks == 2 && pdimm[1].n_ranks == 2) {
/* four chip-selects */
popts->ddr_cdr1 = DDR_CDR1_DHC_EN |
DDR_CDR1_ODT(DDR_CDR_ODT_80ohm);
popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm);
popts->twot_en = 1; /* enable 2T timing */
} else {
popts->ddr_cdr1 = DDR_CDR1_DHC_EN |
DDR_CDR1_ODT(DDR_CDR_ODT_60ohm);
popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_60ohm) |
DDR_CDR2_VREF_RANGE_2;
}
} else {
popts->ddr_cdr1 = DDR_CDR1_DHC_EN |
DDR_CDR1_ODT(DDR_CDR_ODT_100ohm);
popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_100ohm) |
DDR_CDR2_VREF_RANGE_2;
}
}
int fsl_initdram(void)
{
#if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
gd->ram_size = fsl_ddr_sdram_size();
#else
puts("Initializing DDR....using SPD\n");
gd->ram_size = fsl_ddr_sdram();
#endif
return 0;
}
|
