1 /*
2  * Copyright 2016 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 				goto found;
45 			}
46 			pbsp_highest = pbsp;
47 		}
48 		pbsp++;
49 	}
50 
51 	if (pbsp_highest) {
52 		printf("Error: board specific timing not found for %lu MT/s\n",
53 		       ddr_freq);
54 		printf("Trying to use the highest speed (%u) parameters\n",
55 		       pbsp_highest->datarate_mhz_high);
56 		popts->clk_adjust = pbsp_highest->clk_adjust;
57 		popts->wrlvl_start = pbsp_highest->wrlvl_start;
58 		popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
59 		popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
60 	} else {
61 		panic("DIMM is not supported by this board");
62 	}
63 found:
64 	debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n",
65 	      pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb);
66 
67 	popts->data_bus_width = 0;	/* 64-bit data bus */
68 	popts->otf_burst_chop_en = 0;
69 	popts->burst_length = DDR_BL8;
70 	popts->bstopre = 0;		/* enable auto precharge */
71 
72 	/*
73 	 * Factors to consider for half-strength driver enable:
74 	 *	- number of DIMMs installed
75 	 */
76 	popts->half_strength_driver_enable = 0;
77 	/*
78 	 * Write leveling override
79 	 */
80 	popts->wrlvl_override = 1;
81 	popts->wrlvl_sample = 0xf;
82 
83 	/*
84 	 * Rtt and Rtt_WR override
85 	 */
86 	popts->rtt_override = 0;
87 
88 	/* Enable ZQ calibration */
89 	popts->zq_en = 1;
90 
91 	popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_80ohm);
92 	popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm) |
93 			  DDR_CDR2_VREF_TRAIN_EN | DDR_CDR2_VREF_RANGE_2;
94 
95 	/* optimize cpo for erratum A-009942 */
96 	popts->cpo_sample = 0x70;
97 }
98 
99 int fsl_initdram(void)
100 {
101 	phys_size_t dram_size;
102 
103 #if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
104 	return fsl_ddr_sdram_size();
105 #else
106 	puts("Initializing DDR....using SPD\n");
107 
108 	dram_size = fsl_ddr_sdram();
109 #endif
110 
111 	erratum_a008850_post();
112 
113 	gd->ram_size = dram_size;
114 
115 	return 0;
116 }
117