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Commit | Line | Data |
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129ba616 KG |
1 | /* |
2 | * Copyright 2008 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 as published by the Free Software Foundation. | |
7 | */ | |
8 | ||
9 | #include <common.h> | |
129ba616 | 10 | |
5614e71b YS |
11 | #include <fsl_ddr_sdram.h> |
12 | #include <fsl_ddr_dimm_params.h> | |
129ba616 | 13 | |
712cf7ab | 14 | struct board_specific_parameters { |
4ca06607 | 15 | u32 n_ranks; |
712cf7ab | 16 | u32 datarate_mhz_high; |
4ca06607 HW |
17 | u32 clk_adjust; |
18 | u32 cpo; | |
19 | u32 write_data_delay; | |
0dd38a35 | 20 | u32 force_2t; |
712cf7ab | 21 | }; |
4ca06607 | 22 | |
634bc554 | 23 | /* |
712cf7ab YS |
24 | * This table contains all valid speeds we want to override with board |
25 | * specific parameters. datarate_mhz_high values need to be in ascending order | |
26 | * for each n_ranks group. | |
634bc554 YS |
27 | * |
28 | * For DDR2 DIMM, all combinations of clk_adjust and write_data_delay have been | |
29 | * tested. For RDIMM, clk_adjust = 4 and write_data_delay = 3 is optimized for | |
30 | * all clocks from 400MT/s to 800MT/s, verified with Kingston KVR800D2D8P6/2G. | |
31 | * For UDIMM, clk_adjust = 8 and write_delay = 5 is optimized for all clocks | |
32 | * from 400MT/s to 800MT/s, verified with Micron MT18HTF25672AY-800E1. | |
712cf7ab YS |
33 | * |
34 | * CPO value doesn't matter if workaround for errata 111 and 134 enabled. | |
4ca06607 | 35 | */ |
712cf7ab | 36 | static const struct board_specific_parameters udimm0[] = { |
634bc554 | 37 | /* |
712cf7ab YS |
38 | * memory controller 0 |
39 | * num| hi| clk| cpo|wrdata|2T | |
40 | * ranks| mhz|adjst| | delay| | |
634bc554 | 41 | */ |
712cf7ab YS |
42 | {2, 333, 8, 7, 5, 0}, |
43 | {2, 400, 8, 9, 5, 0}, | |
44 | {2, 549, 8, 11, 5, 0}, | |
45 | {2, 680, 8, 10, 5, 0}, | |
46 | {2, 850, 8, 12, 5, 1}, | |
47 | {1, 333, 6, 7, 3, 0}, | |
48 | {1, 400, 6, 9, 3, 0}, | |
49 | {1, 549, 6, 11, 3, 0}, | |
50 | {1, 680, 1, 10, 5, 0}, | |
51 | {1, 850, 1, 12, 5, 0}, | |
52 | {} | |
53 | }; | |
4ca06607 | 54 | |
712cf7ab | 55 | static const struct board_specific_parameters udimm1[] = { |
634bc554 | 56 | /* |
712cf7ab YS |
57 | * memory controller 1 |
58 | * num| hi| clk| cpo|wrdata|2T | |
59 | * ranks| mhz|adjst| | delay| | |
634bc554 | 60 | */ |
712cf7ab YS |
61 | {2, 333, 8, 7, 5, 0}, |
62 | {2, 400, 8, 9, 5, 0}, | |
63 | {2, 549, 8, 11, 5, 0}, | |
64 | {2, 680, 8, 11, 5, 0}, | |
65 | {2, 850, 8, 13, 5, 1}, | |
66 | {1, 333, 6, 7, 3, 0}, | |
67 | {1, 400, 6, 9, 3, 0}, | |
68 | {1, 549, 6, 11, 3, 0}, | |
69 | {1, 680, 1, 11, 6, 0}, | |
70 | {1, 850, 1, 13, 6, 0}, | |
71 | {} | |
72 | }; | |
73 | ||
74 | static const struct board_specific_parameters *udimms[] = { | |
75 | udimm0, | |
76 | udimm1, | |
4ca06607 HW |
77 | }; |
78 | ||
712cf7ab | 79 | static const struct board_specific_parameters rdimm0[] = { |
634bc554 | 80 | /* |
712cf7ab YS |
81 | * memory controller 0 |
82 | * num| hi| clk| cpo|wrdata|2T | |
83 | * ranks| mhz|adjst| | delay| | |
634bc554 | 84 | */ |
712cf7ab YS |
85 | {2, 333, 4, 7, 3, 0}, |
86 | {2, 400, 4, 9, 3, 0}, | |
87 | {2, 549, 4, 11, 3, 0}, | |
88 | {2, 680, 4, 10, 3, 0}, | |
89 | {2, 850, 4, 12, 3, 1}, | |
90 | {} | |
91 | }; | |
634bc554 | 92 | |
712cf7ab | 93 | static const struct board_specific_parameters rdimm1[] = { |
634bc554 | 94 | /* |
712cf7ab YS |
95 | * memory controller 1 |
96 | * num| hi| clk| cpo|wrdata|2T | |
97 | * ranks| mhz|adjst| | delay| | |
634bc554 | 98 | */ |
712cf7ab YS |
99 | {2, 333, 4, 7, 3, 0}, |
100 | {2, 400, 4, 9, 3, 0}, | |
101 | {2, 549, 4, 11, 3, 0}, | |
102 | {2, 680, 4, 11, 3, 0}, | |
103 | {2, 850, 4, 13, 3, 1}, | |
104 | {} | |
105 | }; | |
106 | ||
107 | static const struct board_specific_parameters *rdimms[] = { | |
108 | rdimm0, | |
109 | rdimm1, | |
634bc554 YS |
110 | }; |
111 | ||
dfb49108 HW |
112 | void fsl_ddr_board_options(memctl_options_t *popts, |
113 | dimm_params_t *pdimm, | |
114 | unsigned int ctrl_num) | |
129ba616 | 115 | { |
712cf7ab | 116 | const struct board_specific_parameters *pbsp, *pbsp_highest = NULL; |
4ca06607 | 117 | ulong ddr_freq; |
634bc554 | 118 | |
712cf7ab YS |
119 | if (ctrl_num > 1) { |
120 | printf("Wrong parameter for controller number %d", ctrl_num); | |
634bc554 | 121 | return; |
634bc554 | 122 | } |
712cf7ab YS |
123 | if (!pdimm->n_ranks) |
124 | return; | |
129ba616 | 125 | |
712cf7ab YS |
126 | if (popts->registered_dimm_en) |
127 | pbsp = rdimms[ctrl_num]; | |
128 | else | |
129 | pbsp = udimms[ctrl_num]; | |
129ba616 | 130 | |
4ca06607 HW |
131 | /* Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr |
132 | * freqency and n_banks specified in board_specific_parameters table. | |
129ba616 | 133 | */ |
4ca06607 | 134 | ddr_freq = get_ddr_freq(0) / 1000000; |
712cf7ab YS |
135 | while (pbsp->datarate_mhz_high) { |
136 | if (pbsp->n_ranks == pdimm->n_ranks) { | |
137 | if (ddr_freq <= pbsp->datarate_mhz_high) { | |
138 | popts->clk_adjust = pbsp->clk_adjust; | |
139 | popts->cpo_override = pbsp->cpo; | |
140 | popts->write_data_delay = | |
141 | pbsp->write_data_delay; | |
0dd38a35 | 142 | popts->twot_en = pbsp->force_2t; |
712cf7ab YS |
143 | goto found; |
144 | } | |
145 | pbsp_highest = pbsp; | |
4ca06607 HW |
146 | } |
147 | pbsp++; | |
148 | } | |
129ba616 | 149 | |
712cf7ab YS |
150 | if (pbsp_highest) { |
151 | printf("Error: board specific timing not found " | |
152 | "for data rate %lu MT/s!\n" | |
153 | "Trying to use the highest speed (%u) parameters\n", | |
154 | ddr_freq, pbsp_highest->datarate_mhz_high); | |
155 | popts->clk_adjust = pbsp->clk_adjust; | |
156 | popts->cpo_override = pbsp->cpo; | |
157 | popts->write_data_delay = pbsp->write_data_delay; | |
0dd38a35 | 158 | popts->twot_en = pbsp->force_2t; |
712cf7ab YS |
159 | } else { |
160 | panic("DIMM is not supported by this board"); | |
939e5bf9 | 161 | } |
634bc554 | 162 | |
712cf7ab | 163 | found: |
129ba616 KG |
164 | /* |
165 | * Factors to consider for half-strength driver enable: | |
166 | * - number of DIMMs installed | |
167 | */ | |
168 | popts->half_strength_driver_enable = 0; | |
169 | } |