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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
/*
* Based on corenet_ds ddr code
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <i2c.h>
#include <hwconfig.h>
#include <asm/mmu.h>
#include <fsl_ddr_sdram.h>
#include <fsl_ddr_dimm_params.h>
#include <asm/fsl_law.h>
DECLARE_GLOBAL_DATA_PTR;
struct board_specific_parameters {
u32 n_ranks;
u32 datarate_mhz_high;
u32 clk_adjust;
u32 wrlvl_start;
u32 cpo;
u32 write_data_delay;
u32 force_2t;
};
/*
* This table contains all valid speeds we want to override with board
* specific parameters. datarate_mhz_high values need to be in ascending order
* for each n_ranks group.
*/
static const struct board_specific_parameters udimm0[] = {
/*
* memory controller 0
* num| hi| clk| wrlvl | cpo |wrdata|2T
* ranks| mhz|adjst| start | |delay |
*/
{4, 850, 4, 6, 0xff, 2, 0},
{4, 950, 5, 7, 0xff, 2, 0},
{4, 1050, 5, 8, 0xff, 2, 0},
{4, 1250, 5, 10, 0xff, 2, 0},
{4, 1350, 5, 11, 0xff, 2, 0},
{4, 1666, 5, 12, 0xff, 2, 0},
{2, 850, 5, 6, 0xff, 2, 0},
{2, 1050, 5, 7, 0xff, 2, 0},
{2, 1250, 4, 6, 0xff, 2, 0},
{2, 1350, 5, 7, 0xff, 2, 0},
{2, 1666, 5, 8, 0xff, 2, 0},
{1, 1250, 4, 6, 0xff, 2, 0},
{1, 1335, 4, 7, 0xff, 2, 0},
{1, 1666, 4, 8, 0xff, 2, 0},
{}
};
/*
* The two slots have slightly different timing. The center values are good
* for both slots. We use identical speed tables for them. In future use, if
* DIMMs have fewer center values that require two separated tables, copy the
* udimm0 table to udimm1 and make changes to clk_adjust and wrlvl_start.
*/
static const struct board_specific_parameters *udimms[] = {
udimm0,
udimm0,
};
static const struct board_specific_parameters rdimm0[] = {
/*
* memory controller 0
* num| hi| clk| wrlvl | cpo |wrdata|2T
* ranks| mhz|adjst| start | |delay |
*/
{4, 850, 4, 6, 0xff, 2, 0},
{4, 950, 5, 7, 0xff, 2, 0},
{4, 1050, 5, 8, 0xff, 2, 0},
{4, 1250, 5, 10, 0xff, 2, 0},
{4, 1350, 5, 11, 0xff, 2, 0},
{4, 1666, 5, 12, 0xff, 2, 0},
{2, 850, 4, 6, 0xff, 2, 0},
{2, 1050, 4, 7, 0xff, 2, 0},
{2, 1666, 4, 8, 0xff, 2, 0},
{1, 850, 4, 5, 0xff, 2, 0},
{1, 950, 4, 7, 0xff, 2, 0},
{1, 1666, 4, 8, 0xff, 2, 0},
{}
};
/*
* The two slots have slightly different timing. See comments above.
*/
static const struct board_specific_parameters *rdimms[] = {
rdimm0,
rdimm0,
};
void fsl_ddr_board_options(memctl_options_t *popts,
dimm_params_t *pdimm,
unsigned int ctrl_num)
{
const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
ulong ddr_freq;
if (ctrl_num > 1) {
printf("Wrong parameter for controller number %d", ctrl_num);
return;
}
if (!pdimm->n_ranks)
return;
if (popts->registered_dimm_en)
pbsp = rdimms[ctrl_num];
else
pbsp = udimms[ctrl_num];
/* Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr
* freqency and n_banks specified in board_specific_parameters table.
*/
ddr_freq = get_ddr_freq(0) / 1000000;
while (pbsp->datarate_mhz_high) {
if (pbsp->n_ranks == pdimm->n_ranks) {
if (ddr_freq <= pbsp->datarate_mhz_high) {
popts->cpo_override = pbsp->cpo;
popts->write_data_delay =
pbsp->write_data_delay;
popts->clk_adjust = pbsp->clk_adjust;
popts->wrlvl_start = pbsp->wrlvl_start;
popts->twot_en = pbsp->force_2t;
goto found;
}
pbsp_highest = pbsp;
}
pbsp++;
}
if (pbsp_highest) {
printf("Error: board specific timing not found for data rate %lu MT/s!\nTrying to use the highest speed (%u) parameters\n",
ddr_freq, pbsp_highest->datarate_mhz_high);
popts->cpo_override = pbsp_highest->cpo;
popts->write_data_delay = pbsp_highest->write_data_delay;
popts->clk_adjust = pbsp_highest->clk_adjust;
popts->wrlvl_start = pbsp_highest->wrlvl_start;
popts->twot_en = pbsp_highest->force_2t;
} else {
panic("DIMM is not supported by this board");
}
found:
/*
* Factors to consider for half-strength driver enable:
* - number of DIMMs installed
*/
popts->half_strength_driver_enable = 0;
/*
* Write leveling override
*/
popts->wrlvl_override = 1;
popts->wrlvl_sample = 0xf;
/*
* Rtt and Rtt_WR override
*/
popts->rtt_override = 0;
/* Enable ZQ calibration */
popts->zq_en = 1;
/* DHC_EN =1, ODT = 60 Ohm */
popts->ddr_cdr1 = DDR_CDR1_DHC_EN;
}
phys_size_t initdram(int board_type)
{
phys_size_t dram_size;
puts("Initializing....");
if (!fsl_use_spd())
panic("Cyrus only supports using SPD for DRAM\n");
puts("using SPD\n");
dram_size = fsl_ddr_sdram();
dram_size = setup_ddr_tlbs(dram_size / 0x100000);
dram_size *= 0x100000;
debug(" DDR: ");
return dram_size;
}
|
