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 #include <asm/arch/clock.h>
15 
16 DECLARE_GLOBAL_DATA_PTR;
17 
18 void fsl_ddr_board_options(memctl_options_t *popts,
19 			   dimm_params_t *pdimm,
20 			   unsigned int ctrl_num)
21 {
22 	const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
23 	ulong ddr_freq;
24 
25 	if (ctrl_num > 1) {
26 		printf("Not supported controller number %d\n", ctrl_num);
27 		return;
28 	}
29 	if (!pdimm->n_ranks)
30 		return;
31 
32 	pbsp = udimms[0];
33 
34 	/* Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr
35 	 * freqency and n_banks specified in board_specific_parameters table.
36 	 */
37 	ddr_freq = get_ddr_freq(0) / 1000000;
38 	while (pbsp->datarate_mhz_high) {
39 		if (pbsp->n_ranks == pdimm->n_ranks) {
40 			if (ddr_freq <= pbsp->datarate_mhz_high) {
41 				popts->clk_adjust = pbsp->clk_adjust;
42 				popts->wrlvl_start = pbsp->wrlvl_start;
43 				popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
44 				popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
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 	popts->data_bus_width = 0;	/* 64-bit data bus */
69 	popts->otf_burst_chop_en = 0;
70 	popts->burst_length = DDR_BL8;
71 	popts->bstopre = 0;		/* enable auto precharge */
72 
73 	/*
74 	 * Factors to consider for half-strength driver enable:
75 	 *	- number of DIMMs installed
76 	 */
77 	popts->half_strength_driver_enable = 0;
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 	popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_80ohm);
93 	popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm) |
94 			  DDR_CDR2_VREF_TRAIN_EN | DDR_CDR2_VREF_RANGE_2;
95 
96 	/* optimize cpo for erratum A-009942 */
97 	popts->cpo_sample = 0x70;
98 }
99 
100 int fsl_initdram(void)
101 {
102 	phys_size_t dram_size;
103 
104 #if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
105 	gd->ram_size = fsl_ddr_sdram_size();
106 
107 	return 0;
108 #else
109 	puts("Initializing DDR....using SPD\n");
110 
111 	dram_size = fsl_ddr_sdram();
112 #endif
113 
114 	erratum_a008850_post();
115 
116 	gd->ram_size = dram_size;
117 
118 	return 0;
119 }
120