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