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
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
/*
* 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 "ddr.h"
#ifdef CONFIG_FSL_DEEP_SLEEP
#include <fsl_sleep.h>
#endif
#include <asm/arch/clock.h>
DECLARE_GLOBAL_DATA_PTR;
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("Not supported controller number %d\n", ctrl_num);
return;
}
if (!pdimm->n_ranks)
return;
pbsp = udimms[0];
/* 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(0) / 1000000;
while (pbsp->datarate_mhz_high) {
if (pbsp->n_ranks == pdimm->n_ranks) {
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;
popts->cpo_override = pbsp->cpo_override;
popts->write_data_delay =
pbsp->write_data_delay;
goto found;
}
pbsp_highest = pbsp;
}
pbsp++;
}
if (pbsp_highest) {
printf("Error: board specific timing not found for %lu MT/s\n",
ddr_freq);
printf("Trying to use the highest speed (%u) parameters\n",
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",
pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb);
/* force DDR bus width to 32 bits */
popts->data_bus_width = 1;
popts->otf_burst_chop_en = 0;
popts->burst_length = DDR_BL8;
/*
* Factors to consider for half-strength driver enable:
* - number of DIMMs installed
*/
popts->half_strength_driver_enable = 1;
/*
* 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;
/* optimize cpo for erratum A-009942 */
popts->cpo_sample = 0x46;
popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_80ohm);
popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm) |
DDR_CDR2_VREF_OVRD(70); /* Vref = 70% */
}
/* DDR model number: MT40A512M8HX-093E */
#ifdef CONFIG_SYS_DDR_RAW_TIMING
dimm_params_t ddr_raw_timing = {
.n_ranks = 1,
.rank_density = 2147483648u,
.capacity = 2147483648u,
.primary_sdram_width = 32,
.ec_sdram_width = 0,
.registered_dimm = 0,
.mirrored_dimm = 0,
.n_row_addr = 15,
.n_col_addr = 10,
.bank_addr_bits = 0,
.bank_group_bits = 2,
.edc_config = 0,
.burst_lengths_bitmask = 0x0c,
.tckmin_x_ps = 938,
.tckmax_ps = 1500,
.caslat_x = 0x000DFA00,
.taa_ps = 13500,
.trcd_ps = 13500,
.trp_ps = 13500,
.tras_ps = 33000,
.trc_ps = 46500,
.trfc1_ps = 260000,
.trfc2_ps = 160000,
.trfc4_ps = 110000,
.tfaw_ps = 21000,
.trrds_ps = 3700,
.trrdl_ps = 5300,
.tccdl_ps = 5355,
.refresh_rate_ps = 7800000,
.dq_mapping[0] = 0x0,
.dq_mapping[1] = 0x0,
.dq_mapping[2] = 0x0,
.dq_mapping[3] = 0x0,
.dq_mapping[4] = 0x0,
.dq_mapping[5] = 0x0,
.dq_mapping[6] = 0x0,
.dq_mapping[7] = 0x0,
.dq_mapping[8] = 0x0,
.dq_mapping[9] = 0x0,
.dq_mapping[10] = 0x0,
.dq_mapping[11] = 0x0,
.dq_mapping[12] = 0x0,
.dq_mapping[13] = 0x0,
.dq_mapping[14] = 0x0,
.dq_mapping[15] = 0x0,
.dq_mapping[16] = 0x0,
.dq_mapping[17] = 0x0,
.dq_mapping_ors = 0,
};
int fsl_ddr_get_dimm_params(dimm_params_t *pdimm,
unsigned int controller_number,
unsigned int dimm_number)
{
static const char dimm_model[] = "Fixed DDR on board";
if (((controller_number == 0) && (dimm_number == 0)) ||
((controller_number == 1) && (dimm_number == 0))) {
memcpy(pdimm, &ddr_raw_timing, sizeof(dimm_params_t));
memset(pdimm->mpart, 0, sizeof(pdimm->mpart));
memcpy(pdimm->mpart, dimm_model, sizeof(dimm_model) - 1);
}
return 0;
}
#else
phys_size_t fixed_sdram(void)
{
int i;
char buf[32];
fsl_ddr_cfg_regs_t ddr_cfg_regs;
phys_size_t ddr_size;
ulong ddr_freq, ddr_freq_mhz;
ddr_freq = get_ddr_freq(0);
ddr_freq_mhz = ddr_freq / 1000000;
printf("Configuring DDR for %s MT/s data rate\n",
strmhz(buf, ddr_freq));
for (i = 0; fixed_ddr_parm_0[i].max_freq > 0; i++) {
if ((ddr_freq_mhz > fixed_ddr_parm_0[i].min_freq) &&
(ddr_freq_mhz <= fixed_ddr_parm_0[i].max_freq)) {
memcpy(&ddr_cfg_regs,
fixed_ddr_parm_0[i].ddr_settings,
sizeof(ddr_cfg_regs));
break;
}
}
if (fixed_ddr_parm_0[i].max_freq == 0)
panic("Unsupported DDR data rate %s MT/s data rate\n",
strmhz(buf, ddr_freq));
ddr_size = (phys_size_t)2048 * 1024 * 1024;
fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0, 0);
return ddr_size;
}
#endif
int fsl_initdram(void)
{
phys_size_t dram_size;
#ifdef CONFIG_SYS_DDR_RAW_TIMING
#if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_SPL)
puts("Initializing DDR....\n");
dram_size = fsl_ddr_sdram();
#else
dram_size = fsl_ddr_sdram_size();
#endif
#else
#if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_SPL)
puts("Initialzing DDR using fixed setting\n");
dram_size = fixed_sdram();
#else
gd->ram_size = 0x80000000;
return 0;
#endif
#endif
erratum_a008850_post();
#ifdef CONFIG_FSL_DEEP_SLEEP
fsl_dp_ddr_restore();
#endif
gd->ram_size = dram_size;
return 0;
}
|
