]>
Commit | Line | Data |
---|---|---|
4f1d1b7d MH |
1 | /* |
2 | * Copyright 2011 Freescale Semiconductor, Inc. | |
3 | * | |
5b8031cc | 4 | * SPDX-License-Identifier: GPL-2.0 |
4f1d1b7d MH |
5 | */ |
6 | ||
7 | #include <common.h> | |
8 | #include <i2c.h> | |
9 | #include <hwconfig.h> | |
10 | #include <asm/mmu.h> | |
5614e71b YS |
11 | #include <fsl_ddr_sdram.h> |
12 | #include <fsl_ddr_dimm_params.h> | |
4f1d1b7d MH |
13 | #include <asm/fsl_law.h> |
14 | ||
088454cd SG |
15 | DECLARE_GLOBAL_DATA_PTR; |
16 | ||
712cf7ab | 17 | struct board_specific_parameters { |
4f1d1b7d | 18 | u32 n_ranks; |
712cf7ab | 19 | u32 datarate_mhz_high; |
4f1d1b7d MH |
20 | u32 clk_adjust; |
21 | u32 wrlvl_start; | |
22 | u32 cpo; | |
23 | u32 write_data_delay; | |
0dd38a35 | 24 | u32 force_2t; |
712cf7ab | 25 | }; |
4f1d1b7d MH |
26 | |
27 | /* | |
712cf7ab YS |
28 | * This table contains all valid speeds we want to override with board |
29 | * specific parameters. datarate_mhz_high values need to be in ascending order | |
30 | * for each n_ranks group. | |
31 | * | |
4f1d1b7d MH |
32 | * ranges for parameters: |
33 | * wr_data_delay = 0-6 | |
34 | * clk adjust = 0-8 | |
35 | * cpo 2-0x1E (30) | |
36 | */ | |
712cf7ab | 37 | static const struct board_specific_parameters dimm0[] = { |
4f1d1b7d MH |
38 | /* |
39 | * memory controller 0 | |
712cf7ab YS |
40 | * num| hi| clk| wrlvl | cpo |wrdata|2T |
41 | * ranks| mhz|adjst| start | delay| | |
4f1d1b7d | 42 | */ |
712cf7ab YS |
43 | {2, 750, 3, 5, 0xff, 2, 0}, |
44 | {2, 1250, 4, 6, 0xff, 2, 0}, | |
45 | {2, 1350, 5, 7, 0xff, 2, 0}, | |
46 | {2, 1666, 5, 8, 0xff, 2, 0}, | |
47 | {} | |
4f1d1b7d MH |
48 | }; |
49 | ||
50 | void fsl_ddr_board_options(memctl_options_t *popts, | |
51 | dimm_params_t *pdimm, | |
52 | unsigned int ctrl_num) | |
53 | { | |
712cf7ab | 54 | const struct board_specific_parameters *pbsp, *pbsp_highest = NULL; |
4f1d1b7d MH |
55 | ulong ddr_freq; |
56 | ||
712cf7ab YS |
57 | if (ctrl_num) { |
58 | printf("Wrong parameter for controller number %d", ctrl_num); | |
59 | return; | |
60 | } | |
61 | if (!pdimm->n_ranks) | |
62 | return; | |
63 | ||
64 | pbsp = dimm0; | |
65 | ||
4f1d1b7d MH |
66 | /* |
67 | * Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr | |
68 | * freqency and n_banks specified in board_specific_parameters table. | |
69 | */ | |
70 | ddr_freq = get_ddr_freq(0) / 1000000; | |
712cf7ab YS |
71 | while (pbsp->datarate_mhz_high) { |
72 | if (pbsp->n_ranks == pdimm->n_ranks) { | |
73 | if (ddr_freq <= pbsp->datarate_mhz_high) { | |
74 | popts->cpo_override = pbsp->cpo; | |
75 | popts->write_data_delay = | |
76 | pbsp->write_data_delay; | |
77 | popts->clk_adjust = pbsp->clk_adjust; | |
78 | popts->wrlvl_start = pbsp->wrlvl_start; | |
0dd38a35 | 79 | popts->twot_en = pbsp->force_2t; |
712cf7ab YS |
80 | goto found; |
81 | } | |
82 | pbsp_highest = pbsp; | |
4f1d1b7d MH |
83 | } |
84 | pbsp++; | |
85 | } | |
86 | ||
712cf7ab YS |
87 | if (pbsp_highest) { |
88 | printf("Error: board specific timing not found " | |
89 | "for data rate %lu MT/s!\n" | |
90 | "Trying to use the highest speed (%u) parameters\n", | |
91 | ddr_freq, pbsp_highest->datarate_mhz_high); | |
92 | popts->cpo_override = pbsp_highest->cpo; | |
93 | popts->write_data_delay = pbsp_highest->write_data_delay; | |
94 | popts->clk_adjust = pbsp_highest->clk_adjust; | |
95 | popts->wrlvl_start = pbsp_highest->wrlvl_start; | |
0dd38a35 | 96 | popts->twot_en = pbsp_highest->force_2t; |
712cf7ab YS |
97 | } else { |
98 | panic("DIMM is not supported by this board"); | |
4f1d1b7d MH |
99 | } |
100 | ||
712cf7ab | 101 | found: |
4f1d1b7d MH |
102 | /* |
103 | * Factors to consider for half-strength driver enable: | |
104 | * - number of DIMMs installed | |
105 | */ | |
106 | popts->half_strength_driver_enable = 0; | |
107 | /* Write leveling override */ | |
108 | popts->wrlvl_override = 1; | |
109 | popts->wrlvl_sample = 0xf; | |
110 | ||
111 | /* Rtt and Rtt_WR override */ | |
112 | popts->rtt_override = 0; | |
113 | ||
114 | /* Enable ZQ calibration */ | |
115 | popts->zq_en = 1; | |
116 | ||
117 | /* DHC_EN =1, ODT = 60 Ohm */ | |
118 | popts->ddr_cdr1 = DDR_CDR1_DHC_EN; | |
119 | } | |
120 | ||
088454cd | 121 | int initdram(void) |
4f1d1b7d MH |
122 | { |
123 | phys_size_t dram_size = 0; | |
124 | ||
125 | puts("Initializing...."); | |
126 | ||
127 | if (fsl_use_spd()) { | |
128 | puts("using SPD\n"); | |
129 | dram_size = fsl_ddr_sdram(); | |
130 | } else { | |
131 | puts("no SPD and fixed parameters\n"); | |
088454cd | 132 | return -ENXIO; |
4f1d1b7d MH |
133 | } |
134 | ||
135 | dram_size = setup_ddr_tlbs(dram_size / 0x100000); | |
136 | dram_size *= 0x100000; | |
137 | ||
21cd5815 | 138 | debug(" DDR: "); |
088454cd SG |
139 | gd->ram_size = dram_size; |
140 | ||
141 | return 0; | |
4f1d1b7d | 142 | } |