]>
Commit | Line | Data |
---|---|---|
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> | |
10 | #include <i2c.h> | |
11 | ||
12 | #include <asm/fsl_ddr_sdram.h> | |
dfb49108 | 13 | #include <asm/fsl_ddr_dimm_params.h> |
129ba616 KG |
14 | |
15 | static void get_spd(ddr2_spd_eeprom_t *spd, unsigned char i2c_address) | |
16 | { | |
17 | i2c_read(i2c_address, 0, 1, (uchar *)spd, sizeof(ddr2_spd_eeprom_t)); | |
18 | } | |
19 | ||
129ba616 KG |
20 | void fsl_ddr_get_spd(ddr2_spd_eeprom_t *ctrl_dimms_spd, |
21 | unsigned int ctrl_num) | |
22 | { | |
23 | unsigned int i; | |
24 | unsigned int i2c_address = 0; | |
25 | ||
26 | for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) { | |
27 | if (ctrl_num == 0 && i == 0) { | |
28 | i2c_address = SPD_EEPROM_ADDRESS1; | |
29 | } | |
30 | if (ctrl_num == 1 && i == 0) { | |
31 | i2c_address = SPD_EEPROM_ADDRESS2; | |
32 | } | |
33 | get_spd(&(ctrl_dimms_spd[i]), i2c_address); | |
34 | } | |
35 | } | |
36 | ||
4ca06607 HW |
37 | typedef struct { |
38 | u32 datarate_mhz_low; | |
39 | u32 datarate_mhz_high; | |
40 | u32 n_ranks; | |
41 | u32 clk_adjust; | |
42 | u32 cpo; | |
43 | u32 write_data_delay; | |
44 | u32 force_2T; | |
45 | } board_specific_parameters_t; | |
46 | ||
634bc554 YS |
47 | /* |
48 | * CPO value doesn't matter if workaround for errata 111 and 134 enabled. | |
49 | * | |
50 | * For DDR2 DIMM, all combinations of clk_adjust and write_data_delay have been | |
51 | * tested. For RDIMM, clk_adjust = 4 and write_data_delay = 3 is optimized for | |
52 | * all clocks from 400MT/s to 800MT/s, verified with Kingston KVR800D2D8P6/2G. | |
53 | * For UDIMM, clk_adjust = 8 and write_delay = 5 is optimized for all clocks | |
54 | * from 400MT/s to 800MT/s, verified with Micron MT18HTF25672AY-800E1. | |
4ca06607 | 55 | */ |
634bc554 | 56 | const board_specific_parameters_t board_specific_parameters_udimm[][20] = { |
4ca06607 | 57 | { |
634bc554 YS |
58 | /* |
59 | * memory controller 0 | |
60 | * lo| hi| num| clk| cpo|wrdata|2T | |
61 | * mhz| mhz|ranks|adjst| | delay| | |
62 | */ | |
63 | { 0, 333, 2, 8, 7, 5, 0}, | |
64 | {334, 400, 2, 8, 9, 5, 0}, | |
65 | {401, 549, 2, 8, 11, 5, 0}, | |
66 | {550, 680, 2, 8, 10, 5, 0}, | |
67 | {681, 850, 2, 8, 12, 5, 1}, | |
4ca06607 HW |
68 | { 0, 333, 1, 6, 7, 3, 0}, |
69 | {334, 400, 1, 6, 9, 3, 0}, | |
70 | {401, 549, 1, 6, 11, 3, 0}, | |
71 | {550, 680, 1, 1, 10, 5, 0}, | |
72 | {681, 850, 1, 1, 12, 5, 0} | |
73 | }, | |
74 | ||
75 | { | |
634bc554 YS |
76 | /* |
77 | * memory controller 1 | |
78 | * lo| hi| num| clk| cpo|wrdata|2T | |
79 | * mhz| mhz|ranks|adjst| | delay| | |
80 | */ | |
81 | { 0, 333, 2, 8, 7, 5, 0}, | |
82 | {334, 400, 2, 8, 9, 5, 0}, | |
83 | {401, 549, 2, 8, 11, 5, 0}, | |
84 | {550, 680, 2, 8, 11, 5, 0}, | |
85 | {681, 850, 2, 8, 13, 5, 1}, | |
4ca06607 HW |
86 | { 0, 333, 1, 6, 7, 3, 0}, |
87 | {334, 400, 1, 6, 9, 3, 0}, | |
88 | {401, 549, 1, 6, 11, 3, 0}, | |
89 | {550, 680, 1, 1, 11, 6, 0}, | |
90 | {681, 850, 1, 1, 13, 6, 0} | |
91 | } | |
92 | }; | |
93 | ||
634bc554 YS |
94 | const board_specific_parameters_t board_specific_parameters_rdimm[][20] = { |
95 | { | |
96 | /* | |
97 | * memory controller 0 | |
98 | * lo| hi| num| clk| cpo|wrdata|2T | |
99 | * mhz| mhz|ranks|adjst| | delay| | |
100 | */ | |
101 | { 0, 333, 2, 4, 7, 3, 0}, | |
102 | {334, 400, 2, 4, 9, 3, 0}, | |
103 | {401, 549, 2, 4, 11, 3, 0}, | |
104 | {550, 680, 2, 4, 10, 3, 0}, | |
105 | {681, 850, 2, 4, 12, 3, 1}, | |
106 | }, | |
107 | ||
108 | { | |
109 | /* | |
110 | * memory controller 1 | |
111 | * lo| hi| num| clk| cpo|wrdata|2T | |
112 | * mhz| mhz|ranks|adjst| | delay| | |
113 | */ | |
114 | { 0, 333, 2, 4, 7, 3, 0}, | |
115 | {334, 400, 2, 4, 9, 3, 0}, | |
116 | {401, 549, 2, 4, 11, 3, 0}, | |
117 | {550, 680, 2, 4, 11, 3, 0}, | |
118 | {681, 850, 2, 4, 13, 3, 1}, | |
119 | } | |
120 | }; | |
121 | ||
dfb49108 HW |
122 | void fsl_ddr_board_options(memctl_options_t *popts, |
123 | dimm_params_t *pdimm, | |
124 | unsigned int ctrl_num) | |
129ba616 | 125 | { |
634bc554 YS |
126 | const board_specific_parameters_t *pbsp; |
127 | u32 num_params; | |
4ca06607 HW |
128 | u32 i; |
129 | ulong ddr_freq; | |
634bc554 YS |
130 | int matched = 0; |
131 | ||
132 | if (!pdimm->n_ranks) | |
133 | return; | |
134 | ||
135 | if (popts->registered_dimm_en) { | |
136 | pbsp = &(board_specific_parameters_rdimm[ctrl_num][0]); | |
137 | num_params = sizeof(board_specific_parameters_rdimm[ctrl_num]) / | |
138 | sizeof(board_specific_parameters_rdimm[0][0]); | |
139 | } else { | |
140 | pbsp = &(board_specific_parameters_udimm[ctrl_num][0]); | |
141 | num_params = sizeof(board_specific_parameters_udimm[ctrl_num]) / | |
142 | sizeof(board_specific_parameters_udimm[0][0]); | |
143 | } | |
129ba616 | 144 | |
4ca06607 HW |
145 | /* set odt_rd_cfg and odt_wr_cfg. If the there is only one dimm in |
146 | * that controller, set odt_wr_cfg to 4 for CS0, and 0 to CS1. If | |
147 | * there are two dimms in the controller, set odt_rd_cfg to 3 and | |
148 | * odt_wr_cfg to 3 for the even CS, 0 for the odd CS. | |
129ba616 | 149 | */ |
4ca06607 HW |
150 | for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { |
151 | if (i&1) { /* odd CS */ | |
152 | popts->cs_local_opts[i].odt_rd_cfg = 0; | |
153 | popts->cs_local_opts[i].odt_wr_cfg = 0; | |
154 | } else { /* even CS */ | |
155 | if (CONFIG_DIMM_SLOTS_PER_CTLR == 1) { | |
156 | popts->cs_local_opts[i].odt_rd_cfg = 0; | |
157 | popts->cs_local_opts[i].odt_wr_cfg = 4; | |
158 | } else if (CONFIG_DIMM_SLOTS_PER_CTLR == 2) { | |
159 | popts->cs_local_opts[i].odt_rd_cfg = 3; | |
160 | popts->cs_local_opts[i].odt_wr_cfg = 3; | |
161 | } | |
162 | } | |
163 | } | |
129ba616 | 164 | |
4ca06607 HW |
165 | /* Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr |
166 | * freqency and n_banks specified in board_specific_parameters table. | |
129ba616 | 167 | */ |
4ca06607 HW |
168 | ddr_freq = get_ddr_freq(0) / 1000000; |
169 | for (i = 0; i < num_params; i++) { | |
170 | if (ddr_freq >= pbsp->datarate_mhz_low && | |
171 | ddr_freq <= pbsp->datarate_mhz_high && | |
172 | pdimm->n_ranks == pbsp->n_ranks) { | |
173 | popts->clk_adjust = pbsp->clk_adjust; | |
174 | popts->cpo_override = pbsp->cpo; | |
175 | popts->write_data_delay = pbsp->write_data_delay; | |
176 | popts->twoT_en = pbsp->force_2T; | |
634bc554 YS |
177 | matched = 1; |
178 | break; | |
4ca06607 HW |
179 | } |
180 | pbsp++; | |
181 | } | |
129ba616 | 182 | |
634bc554 YS |
183 | if (!matched) |
184 | printf("Warning: board specific timing not found!\n"); | |
185 | ||
129ba616 KG |
186 | /* |
187 | * Factors to consider for half-strength driver enable: | |
188 | * - number of DIMMs installed | |
189 | */ | |
190 | popts->half_strength_driver_enable = 0; | |
191 | } |