1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2015 Freescale Semiconductor, Inc.
4 */
5
6 #include <common.h>
7 #include <fsl_ddr_sdram.h>
8 #include <fsl_ddr_dimm_params.h>
9 #include <asm/global_data.h>
10 #include "ddr.h"
11 #include <log.h>
12 #include <vsprintf.h>
13 #ifdef CONFIG_FSL_DEEP_SLEEP
14 #include <fsl_sleep.h>
15 #endif
16 #include <asm/arch/clock.h>
17
18 DECLARE_GLOBAL_DATA_PTR;
19
fsl_ddr_board_options(memctl_options_t * popts,dimm_params_t * pdimm,unsigned int ctrl_num)20 void fsl_ddr_board_options(memctl_options_t *popts,
21 dimm_params_t *pdimm,
22 unsigned int ctrl_num)
23 {
24 const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
25 ulong ddr_freq;
26
27 if (ctrl_num > 1) {
28 printf("Not supported controller number %d\n", ctrl_num);
29 return;
30 }
31 if (!pdimm->n_ranks)
32 return;
33
34 pbsp = udimms[0];
35
36 /* Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr
37 * freqency and n_banks specified in board_specific_parameters table.
38 */
39 ddr_freq = get_ddr_freq(0) / 1000000;
40 while (pbsp->datarate_mhz_high) {
41 if (pbsp->n_ranks == pdimm->n_ranks) {
42 if (ddr_freq <= pbsp->datarate_mhz_high) {
43 popts->clk_adjust = pbsp->clk_adjust;
44 popts->wrlvl_start = pbsp->wrlvl_start;
45 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
46 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
47 popts->cpo_override = pbsp->cpo_override;
48 popts->write_data_delay =
49 pbsp->write_data_delay;
50 goto found;
51 }
52 pbsp_highest = pbsp;
53 }
54 pbsp++;
55 }
56
57 if (pbsp_highest) {
58 printf("Error: board specific timing not found for %lu MT/s\n",
59 ddr_freq);
60 printf("Trying to use the highest speed (%u) parameters\n",
61 pbsp_highest->datarate_mhz_high);
62 popts->clk_adjust = pbsp_highest->clk_adjust;
63 popts->wrlvl_start = pbsp_highest->wrlvl_start;
64 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
65 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
66 } else {
67 panic("DIMM is not supported by this board");
68 }
69 found:
70 debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n",
71 pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb);
72
73 /* force DDR bus width to 32 bits */
74 popts->data_bus_width = 1;
75 popts->otf_burst_chop_en = 0;
76 popts->burst_length = DDR_BL8;
77
78 /*
79 * Factors to consider for half-strength driver enable:
80 * - number of DIMMs installed
81 */
82 popts->half_strength_driver_enable = 1;
83 /*
84 * Write leveling override
85 */
86 popts->wrlvl_override = 1;
87 popts->wrlvl_sample = 0xf;
88
89 /*
90 * Rtt and Rtt_WR override
91 */
92 popts->rtt_override = 0;
93
94 /* Enable ZQ calibration */
95 popts->zq_en = 1;
96
97 /* optimize cpo for erratum A-009942 */
98 popts->cpo_sample = 0x46;
99
100 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_80ohm);
101 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm) |
102 DDR_CDR2_VREF_OVRD(70); /* Vref = 70% */
103 }
104
105 /* DDR model number: MT40A512M8HX-093E */
106 #ifdef CONFIG_SYS_DDR_RAW_TIMING
107 dimm_params_t ddr_raw_timing = {
108 .n_ranks = 1,
109 .rank_density = 2147483648u,
110 .capacity = 2147483648u,
111 .primary_sdram_width = 32,
112 .ec_sdram_width = 0,
113 .registered_dimm = 0,
114 .mirrored_dimm = 0,
115 .n_row_addr = 15,
116 .n_col_addr = 10,
117 .bank_addr_bits = 0,
118 .bank_group_bits = 2,
119 .edc_config = 0,
120 .burst_lengths_bitmask = 0x0c,
121
122 .tckmin_x_ps = 938,
123 .tckmax_ps = 1500,
124 .caslat_x = 0x000DFA00,
125 .taa_ps = 13500,
126 .trcd_ps = 13500,
127 .trp_ps = 13500,
128 .tras_ps = 33000,
129 .trc_ps = 46500,
130 .trfc1_ps = 260000,
131 .trfc2_ps = 160000,
132 .trfc4_ps = 110000,
133 .tfaw_ps = 21000,
134 .trrds_ps = 3700,
135 .trrdl_ps = 5300,
136 .tccdl_ps = 5355,
137 .refresh_rate_ps = 7800000,
138 .dq_mapping[0] = 0x0,
139 .dq_mapping[1] = 0x0,
140 .dq_mapping[2] = 0x0,
141 .dq_mapping[3] = 0x0,
142 .dq_mapping[4] = 0x0,
143 .dq_mapping[5] = 0x0,
144 .dq_mapping[6] = 0x0,
145 .dq_mapping[7] = 0x0,
146 .dq_mapping[8] = 0x0,
147 .dq_mapping[9] = 0x0,
148 .dq_mapping[10] = 0x0,
149 .dq_mapping[11] = 0x0,
150 .dq_mapping[12] = 0x0,
151 .dq_mapping[13] = 0x0,
152 .dq_mapping[14] = 0x0,
153 .dq_mapping[15] = 0x0,
154 .dq_mapping[16] = 0x0,
155 .dq_mapping[17] = 0x0,
156 .dq_mapping_ors = 0,
157 };
158
fsl_ddr_get_dimm_params(dimm_params_t * pdimm,unsigned int controller_number,unsigned int dimm_number)159 int fsl_ddr_get_dimm_params(dimm_params_t *pdimm,
160 unsigned int controller_number,
161 unsigned int dimm_number)
162 {
163 static const char dimm_model[] = "Fixed DDR on board";
164
165 if (((controller_number == 0) && (dimm_number == 0)) ||
166 ((controller_number == 1) && (dimm_number == 0))) {
167 memcpy(pdimm, &ddr_raw_timing, sizeof(dimm_params_t));
168 memset(pdimm->mpart, 0, sizeof(pdimm->mpart));
169 memcpy(pdimm->mpart, dimm_model, sizeof(dimm_model) - 1);
170 }
171
172 return 0;
173 }
174 #else
175
fixed_sdram(void)176 phys_size_t fixed_sdram(void)
177 {
178 int i;
179 char buf[32];
180 fsl_ddr_cfg_regs_t ddr_cfg_regs;
181 phys_size_t ddr_size;
182 ulong ddr_freq, ddr_freq_mhz;
183
184 ddr_freq = get_ddr_freq(0);
185 ddr_freq_mhz = ddr_freq / 1000000;
186
187 printf("Configuring DDR for %s MT/s data rate\n",
188 strmhz(buf, ddr_freq));
189
190 for (i = 0; fixed_ddr_parm_0[i].max_freq > 0; i++) {
191 if ((ddr_freq_mhz > fixed_ddr_parm_0[i].min_freq) &&
192 (ddr_freq_mhz <= fixed_ddr_parm_0[i].max_freq)) {
193 memcpy(&ddr_cfg_regs,
194 fixed_ddr_parm_0[i].ddr_settings,
195 sizeof(ddr_cfg_regs));
196 break;
197 }
198 }
199
200 if (fixed_ddr_parm_0[i].max_freq == 0)
201 panic("Unsupported DDR data rate %s MT/s data rate\n",
202 strmhz(buf, ddr_freq));
203
204 ddr_size = (phys_size_t)2048 * 1024 * 1024;
205 fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0, 0);
206
207 return ddr_size;
208 }
209 #endif
210
211 #ifdef CONFIG_TFABOOT
fsl_initdram(void)212 int fsl_initdram(void)
213 {
214 gd->ram_size = tfa_get_dram_size();
215 if (!gd->ram_size)
216 #ifdef CONFIG_SYS_DDR_RAW_TIMING
217 gd->ram_size = fsl_ddr_sdram_size();
218 #else
219 gd->ram_size = 0x80000000;
220 #endif
221 return 0;
222 }
223 #else
fsl_initdram(void)224 int fsl_initdram(void)
225 {
226 phys_size_t dram_size;
227
228 #ifdef CONFIG_SYS_DDR_RAW_TIMING
229 #if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_SPL)
230 puts("Initializing DDR....\n");
231 dram_size = fsl_ddr_sdram();
232 #else
233 dram_size = fsl_ddr_sdram_size();
234 #endif
235 #else
236 #if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_SPL)
237 puts("Initialzing DDR using fixed setting\n");
238 dram_size = fixed_sdram();
239 #else
240 gd->ram_size = 0x80000000;
241
242 return 0;
243 #endif
244 #endif
245 erratum_a008850_post();
246
247 #ifdef CONFIG_FSL_DEEP_SLEEP
248 fsl_dp_ddr_restore();
249 #endif
250
251 gd->ram_size = dram_size;
252
253 return 0;
254 }
255 #endif
256