1 /*
2  * Copyright 2014 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 <asm/io.h>
11 #include "ddr.h"
12 
13 DECLARE_GLOBAL_DATA_PTR;
14 
15 void fsl_ddr_board_options(memctl_options_t *popts,
16 			   dimm_params_t *pdimm,
17 			   unsigned int ctrl_num)
18 {
19 	const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
20 	ulong ddr_freq;
21 
22 	if (ctrl_num > 3) {
23 		printf("Not supported controller number %d\n", ctrl_num);
24 		return;
25 	}
26 	if (!pdimm->n_ranks)
27 		return;
28 
29 	pbsp = udimms[0];
30 
31 	/* Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr
32 	 * freqency and n_banks specified in board_specific_parameters table.
33 	 */
34 	ddr_freq = get_ddr_freq(0) / 1000000;
35 	while (pbsp->datarate_mhz_high) {
36 		if (pbsp->n_ranks == pdimm->n_ranks) {
37 			if (ddr_freq <= pbsp->datarate_mhz_high) {
38 				popts->clk_adjust = pbsp->clk_adjust;
39 				popts->wrlvl_start = pbsp->wrlvl_start;
40 				popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
41 				popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
42 				popts->cpo_override = pbsp->cpo_override;
43 				popts->write_data_delay =
44 					pbsp->write_data_delay;
45 				goto found;
46 			}
47 			pbsp_highest = pbsp;
48 		}
49 		pbsp++;
50 	}
51 
52 	if (pbsp_highest) {
53 		printf("Error: board specific timing not found for %lu MT/s\n",
54 		       ddr_freq);
55 		printf("Trying to use the highest speed (%u) parameters\n",
56 		       pbsp_highest->datarate_mhz_high);
57 		popts->clk_adjust = pbsp_highest->clk_adjust;
58 		popts->wrlvl_start = pbsp_highest->wrlvl_start;
59 		popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
60 		popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
61 	} else {
62 		panic("DIMM is not supported by this board");
63 	}
64 found:
65 	debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n",
66 	      pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb);
67 
68 	/* force DDR bus width to 32 bits */
69 	popts->data_bus_width = 1;
70 	popts->otf_burst_chop_en = 0;
71 	popts->burst_length = DDR_BL8;
72 
73 	/*
74 	 * Factors to consider for half-strength driver enable:
75 	 *	- number of DIMMs installed
76 	 */
77 	popts->half_strength_driver_enable = 1;
78 	/*
79 	 * Write leveling override
80 	 */
81 	popts->wrlvl_override = 1;
82 	popts->wrlvl_sample = 0xf;
83 
84 	/*
85 	 * Rtt and Rtt_WR override
86 	 */
87 	popts->rtt_override = 0;
88 
89 	/* Enable ZQ calibration */
90 	popts->zq_en = 1;
91 
92 #ifdef CONFIG_SYS_FSL_DDR4
93 	popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_80ohm);
94 	popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm) |
95 			  DDR_CDR2_VREF_OVRD(70);	/* Vref = 70% */
96 #else
97 	popts->cswl_override = DDR_CSWL_CS0;
98 
99 	/* optimize cpo for erratum A-009942 */
100 	popts->cpo_sample = 0x58;
101 
102 	/* DHC_EN =1, ODT = 75 Ohm */
103 	popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_75ohm);
104 	popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_75ohm);
105 #endif
106 }
107 
108 #ifdef CONFIG_SYS_DDR_RAW_TIMING
109 dimm_params_t ddr_raw_timing = {
110 	.n_ranks = 1,
111 	.rank_density = 1073741824u,
112 	.capacity = 1073741824u,
113 	.primary_sdram_width = 32,
114 	.ec_sdram_width = 0,
115 	.registered_dimm = 0,
116 	.mirrored_dimm = 0,
117 	.n_row_addr = 15,
118 	.n_col_addr = 10,
119 	.n_banks_per_sdram_device = 8,
120 	.edc_config = 0,
121 	.burst_lengths_bitmask = 0x0c,
122 
123 	.tckmin_x_ps = 1071,
124 	.caslat_x = 0xfe << 4,	/* 5,6,7,8 */
125 	.taa_ps = 13125,
126 	.twr_ps = 15000,
127 	.trcd_ps = 13125,
128 	.trrd_ps = 7500,
129 	.trp_ps = 13125,
130 	.tras_ps = 37500,
131 	.trc_ps = 50625,
132 	.trfc_ps = 160000,
133 	.twtr_ps = 7500,
134 	.trtp_ps = 7500,
135 	.refresh_rate_ps = 7800000,
136 	.tfaw_ps = 37500,
137 };
138 
139 int fsl_ddr_get_dimm_params(dimm_params_t *pdimm,
140 			    unsigned int controller_number,
141 			    unsigned int dimm_number)
142 {
143 	static const char dimm_model[] = "Fixed DDR on board";
144 
145 	if (((controller_number == 0) && (dimm_number == 0)) ||
146 	    ((controller_number == 1) && (dimm_number == 0))) {
147 		memcpy(pdimm, &ddr_raw_timing, sizeof(dimm_params_t));
148 		memset(pdimm->mpart, 0, sizeof(pdimm->mpart));
149 		memcpy(pdimm->mpart, dimm_model, sizeof(dimm_model) - 1);
150 	}
151 
152 	return 0;
153 }
154 #endif
155 
156 #if defined(CONFIG_DEEP_SLEEP)
157 void board_mem_sleep_setup(void)
158 {
159 	void __iomem *qixis_base = (void *)QIXIS_BASE;
160 
161 	/* does not provide HW signals for power management */
162 	clrbits_8(qixis_base + 0x21, 0x2);
163 	udelay(1);
164 }
165 #endif
166 
167 phys_size_t initdram(int board_type)
168 {
169 	phys_size_t dram_size;
170 
171 #if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_SPL)
172 	puts("Initializing DDR....using SPD\n");
173 	dram_size = fsl_ddr_sdram();
174 #else
175 	dram_size =  fsl_ddr_sdram_size();
176 #endif
177 
178 #if defined(CONFIG_DEEP_SLEEP) && !defined(CONFIG_SPL_BUILD)
179 	fsl_dp_resume();
180 #endif
181 
182 	return dram_size;
183 }
184 
185 void dram_init_banksize(void)
186 {
187 	gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
188 	gd->bd->bi_dram[0].size = gd->ram_size;
189 }
190