blob: 0d5783ae04df82169bc33226e939b2a6eaea23da (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/*
* Copyright 2008 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0
*/
#include <common.h>
#include <fsl_ddr_sdram.h>
#include <fsl_ddr_dimm_params.h>
void fsl_ddr_board_options(memctl_options_t *popts,
dimm_params_t *pdimm,
unsigned int ctrl_num)
{
/*
* Factors to consider for clock adjust:
* - number of chips on bus
* - position of slot
* - DDR1 vs. DDR2?
* - ???
*
* This needs to be determined on a board-by-board basis.
* 0110 3/4 cycle late
* 0111 7/8 cycle late
*/
popts->clk_adjust = 7;
/*
* Factors to consider for CPO:
* - frequency
* - ddr1 vs. ddr2
*/
popts->cpo_override = 10;
/*
* Factors to consider for write data delay:
* - number of DIMMs
*
* 1 = 1/4 clock delay
* 2 = 1/2 clock delay
* 3 = 3/4 clock delay
* 4 = 1 clock delay
* 5 = 5/4 clock delay
* 6 = 3/2 clock delay
*/
popts->write_data_delay = 3;
/*
* Factors to consider for half-strength driver enable:
* - number of DIMMs installed
*/
popts->half_strength_driver_enable = 0;
}
|
