blob: 482fd919f5428ad60cdbfb19dda4c57402d1e3ee [file] [log] [blame]
Jon Loeliger194de262008-03-18 13:51:05 -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 Wangfa440362008-10-03 12:36:55 -040013#include <asm/fsl_ddr_dimm_params.h>
Jon Loeliger194de262008-03-18 13:51:05 -050014
15static void
16get_spd(ddr2_spd_eeprom_t *spd, unsigned char i2c_address)
17{
18 i2c_read(i2c_address, 0, 1, (uchar *)spd, sizeof(ddr2_spd_eeprom_t));
19}
20
21
22unsigned int fsl_ddr_get_mem_data_rate(void)
23{
24 return get_ddr_freq(0);
25}
26
27void fsl_ddr_get_spd(ddr2_spd_eeprom_t *ctrl_dimms_spd,
28 unsigned int ctrl_num)
29{
30 unsigned int i;
31
32 if (ctrl_num) {
33 printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num);
34 return;
35 }
36
37 for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) {
38 get_spd(&(ctrl_dimms_spd[i]), SPD_EEPROM_ADDRESS);
39 }
40}
41
Haiying Wangfa440362008-10-03 12:36:55 -040042void fsl_ddr_board_options(memctl_options_t *popts,
43 dimm_params_t *pdimm,
44 unsigned int ctrl_num)
Jon Loeliger194de262008-03-18 13:51:05 -050045{
46 /*
47 * Factors to consider for clock adjust:
48 * - number of chips on bus
49 * - position of slot
50 * - DDR1 vs. DDR2?
51 * - ???
52 *
53 * This needs to be determined on a board-by-board basis.
54 * 0110 3/4 cycle late
55 * 0111 7/8 cycle late
56 */
57 popts->clk_adjust = 6;
58
59 /*
60 * Factors to consider for CPO:
61 * - frequency
62 * - ddr1 vs. ddr2
63 */
64 popts->cpo_override = 10;
65
66 /*
67 * Factors to consider for write data delay:
68 * - number of DIMMs
69 *
70 * 1 = 1/4 clock delay
71 * 2 = 1/2 clock delay
72 * 3 = 3/4 clock delay
73 * 4 = 1 clock delay
74 * 5 = 5/4 clock delay
75 * 6 = 3/2 clock delay
76 */
77 popts->write_data_delay = 3;
78
79 /*
80 * Factors to consider for half-strength driver enable:
81 * - number of DIMMs installed
82 */
83 popts->half_strength_driver_enable = 0;
84}