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Commit | Line | Data |
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c360d9b9 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> |
c360d9b9 KG |
14 | |
15 | static void | |
16 | get_spd(ddr1_spd_eeprom_t *spd, unsigned char i2c_address) | |
17 | { | |
18 | i2c_read(i2c_address, 0, 1, (uchar *)spd, sizeof(ddr1_spd_eeprom_t)); | |
19 | } | |
20 | ||
c360d9b9 KG |
21 | void |
22 | fsl_ddr_get_spd(ddr1_spd_eeprom_t *ctrl_dimms_spd, | |
23 | unsigned int ctrl_num) | |
24 | { | |
25 | unsigned int i; | |
26 | unsigned int i2c_address = 0; | |
27 | ||
28 | for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) { | |
29 | if (ctrl_num == 0 && i == 0) { | |
30 | i2c_address = SPD_EEPROM_ADDRESS; | |
31 | } | |
32 | get_spd(&(ctrl_dimms_spd[i]), i2c_address); | |
33 | } | |
34 | } | |
35 | ||
dfb49108 HW |
36 | void fsl_ddr_board_options(memctl_options_t *popts, |
37 | dimm_params_t *pdimm, | |
38 | unsigned int ctrl_num) | |
c360d9b9 KG |
39 | { |
40 | /* | |
41 | * Factors to consider for CPO: | |
42 | * - frequency | |
43 | * - ddr1 vs. ddr2 | |
44 | */ | |
45 | popts->cpo_override = 0; | |
46 | ||
47 | /* | |
48 | * Factors to consider for write data delay: | |
49 | * - number of DIMMs | |
50 | * | |
51 | * 1 = 1/4 clock delay | |
52 | * 2 = 1/2 clock delay | |
53 | * 3 = 3/4 clock delay | |
54 | * 4 = 1 clock delay | |
55 | * 5 = 5/4 clock delay | |
56 | * 6 = 3/2 clock delay | |
57 | */ | |
58 | popts->write_data_delay = 3; | |
59 | ||
b4983e16 DL |
60 | /* 2T timing enable */ |
61 | popts->twoT_en = 1; | |
62 | ||
c360d9b9 KG |
63 | /* |
64 | * Factors to consider for half-strength driver enable: | |
65 | * - number of DIMMs installed | |
66 | */ | |
67 | popts->half_strength_driver_enable = 0; | |
68 | } |