blob: c84a6cbe1c7715fcfd1b7ec11aecef5a32339da7 [file] [log] [blame]
Jon Loeliger2b40edb2008-03-18 11:12:42 -05001/*
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>
Haiying Wangdfb49102008-10-03 12:36:55 -040013#include <asm/fsl_ddr_dimm_params.h>
Jon Loeliger2b40edb2008-03-18 11:12:42 -050014
15static void
16get_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
21unsigned int fsl_ddr_get_mem_data_rate(void)
22{
23 return get_ddr_freq(0);
24}
25
26void fsl_ddr_get_spd(ddr1_spd_eeprom_t *ctrl_dimms_spd,
27 unsigned int ctrl_num)
28{
29 unsigned int i;
30 unsigned int i2c_address = 0;
31
32 for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) {
33 if (ctrl_num == 0 && i == 0) {
34 i2c_address = SPD_EEPROM_ADDRESS;
35 }
36 get_spd(&(ctrl_dimms_spd[i]), i2c_address);
37 }
38}
39
Haiying Wangdfb49102008-10-03 12:36:55 -040040void fsl_ddr_board_options(memctl_options_t *popts,
41 dimm_params_t *pdimm,
42 unsigned int ctrl_num)
Jon Loeliger2b40edb2008-03-18 11:12:42 -050043{
44 /*
45 * Factors to consider for clock adjust:
46 * - number of chips on bus
47 * - position of slot
48 * - DDR1 vs. DDR2?
49 * - ???
50 *
51 * This needs to be determined on a board-by-board basis.
52 * 0110 3/4 cycle late
53 * 0111 7/8 cycle late
54 */
55 popts->clk_adjust = 6;
56
57 /*
58 * Factors to consider for CPO:
59 * - frequency
60 * - ddr1 vs. ddr2
61 */
62 popts->cpo_override = 0;
63
64 /*
65 * Factors to consider for write data delay:
66 * - number of DIMMs
67 *
68 * 1 = 1/4 clock delay
69 * 2 = 1/2 clock delay
70 * 3 = 3/4 clock delay
71 * 4 = 1 clock delay
72 * 5 = 5/4 clock delay
73 * 6 = 3/2 clock delay
74 */
75 popts->write_data_delay = 3;
76
77 /*
78 * Factors to consider for half-strength driver enable:
79 * - number of DIMMs installed
80 */
81 popts->half_strength_driver_enable = 0;
82}