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York Sunee52b182012-10-11 07:13:37 +00001/*
2 * Copyright 2012 Freescale Semiconductor, Inc.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * Version 2 or later as published by the Free Software Foundation.
7 */
8
9#include <common.h>
10#include <i2c.h>
11#include <hwconfig.h>
12#include <asm/mmu.h>
13#include <asm/fsl_ddr_sdram.h>
14#include <asm/fsl_ddr_dimm_params.h>
15#include <asm/fsl_law.h>
York Sun1cb19fb2013-06-27 10:48:29 -070016#include "ddr.h"
York Sunee52b182012-10-11 07:13:37 +000017
18DECLARE_GLOBAL_DATA_PTR;
19
York Sunee52b182012-10-11 07:13:37 +000020void 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 > 2) {
28 printf("Not supported controller number %d\n", ctrl_num);
29 return;
30 }
31 if (!pdimm->n_ranks)
32 return;
33
34 /*
35 * we use identical timing for all slots. If needed, change the code
36 * to pbsp = rdimms[ctrl_num] or pbsp = udimms[ctrl_num];
37 */
38 if (popts->registered_dimm_en)
39 pbsp = rdimms[0];
40 else
41 pbsp = udimms[0];
42
43
44 /* Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr
45 * freqency and n_banks specified in board_specific_parameters table.
46 */
47 ddr_freq = get_ddr_freq(0) / 1000000;
48 while (pbsp->datarate_mhz_high) {
York Sun054dfd92013-03-25 07:33:19 +000049 if (pbsp->n_ranks == pdimm->n_ranks &&
50 (pdimm->rank_density >> 30) >= pbsp->rank_gb) {
York Sunee52b182012-10-11 07:13:37 +000051 if (ddr_freq <= pbsp->datarate_mhz_high) {
52 popts->cpo_override = pbsp->cpo;
53 popts->write_data_delay =
54 pbsp->write_data_delay;
55 popts->clk_adjust = pbsp->clk_adjust;
56 popts->wrlvl_start = pbsp->wrlvl_start;
57 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
58 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
59 popts->twoT_en = pbsp->force_2T;
60 goto found;
61 }
62 pbsp_highest = pbsp;
63 }
64 pbsp++;
65 }
66
67 if (pbsp_highest) {
68 printf("Error: board specific timing not found "
69 "for data rate %lu MT/s\n"
70 "Trying to use the highest speed (%u) parameters\n",
71 ddr_freq, pbsp_highest->datarate_mhz_high);
72 popts->cpo_override = pbsp_highest->cpo;
73 popts->write_data_delay = pbsp_highest->write_data_delay;
74 popts->clk_adjust = pbsp_highest->clk_adjust;
75 popts->wrlvl_start = pbsp_highest->wrlvl_start;
76 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
77 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
78 popts->twoT_en = pbsp_highest->force_2T;
79 } else {
80 panic("DIMM is not supported by this board");
81 }
82found:
York Sun054dfd92013-03-25 07:33:19 +000083 debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n"
84 "\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, "
85 "wrlvl_ctrl_3 0x%x\n",
86 pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb,
87 pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2,
88 pbsp->wrlvl_ctl_3);
89
York Sunee52b182012-10-11 07:13:37 +000090 /*
91 * Factors to consider for half-strength driver enable:
92 * - number of DIMMs installed
93 */
94 popts->half_strength_driver_enable = 0;
95 /*
96 * Write leveling override
97 */
98 popts->wrlvl_override = 1;
99 popts->wrlvl_sample = 0xf;
100
101 /*
102 * Rtt and Rtt_WR override
103 */
104 popts->rtt_override = 0;
105
106 /* Enable ZQ calibration */
107 popts->zq_en = 1;
108
109 /* DHC_EN =1, ODT = 75 Ohm */
110 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_75ohm);
111 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_75ohm);
112}
113
114phys_size_t initdram(int board_type)
115{
116 phys_size_t dram_size;
117
118 puts("Initializing....using SPD\n");
119
120 dram_size = fsl_ddr_sdram();
121
122 dram_size = setup_ddr_tlbs(dram_size / 0x100000);
123 dram_size *= 0x100000;
124
125 puts(" DDR: ");
126 return dram_size;
127}