blob: ab64fa88f2655916348963351f08d0e277fbc3f1 [file] [log] [blame]
Kumar Gala33b90792008-08-26 23:15:28 -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>
Kumar Gala33b90792008-08-26 23:15:28 -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
21unsigned int fsl_ddr_get_mem_data_rate(void)
22{
23 return get_ddr_freq(0);
24}
25
26void fsl_ddr_get_spd(ddr2_spd_eeprom_t *ctrl_dimms_spd,
27 unsigned int ctrl_num)
28{
29 unsigned int i;
30
31 if (ctrl_num) {
32 printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num);
33 return;
34 }
35
36 for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) {
37 get_spd(&(ctrl_dimms_spd[i]), SPD_EEPROM_ADDRESS);
38 }
39}
40
Haiying Wangdfb49102008-10-03 12:36:55 -040041void fsl_ddr_board_options(memctl_options_t *popts,
42 dimm_params_t *pdimm,
43 unsigned int ctrl_num)
Kumar Gala33b90792008-08-26 23:15:28 -050044{
45 /*
46 * Factors to consider for clock adjust:
47 * - number of chips on bus
48 * - position of slot
49 * - DDR1 vs. DDR2?
50 * - ???
51 *
52 * This needs to be determined on a board-by-board basis.
53 * 0110 3/4 cycle late
54 * 0111 7/8 cycle late
55 */
56 popts->clk_adjust = 7;
57
58 /*
59 * Factors to consider for CPO:
60 * - frequency
61 * - ddr1 vs. ddr2
62 */
63 popts->cpo_override = 10;
64
65 /*
66 * Factors to consider for write data delay:
67 * - number of DIMMs
68 *
69 * 1 = 1/4 clock delay
70 * 2 = 1/2 clock delay
71 * 3 = 3/4 clock delay
72 * 4 = 1 clock delay
73 * 5 = 5/4 clock delay
74 * 6 = 3/2 clock delay
75 */
76 popts->write_data_delay = 3;
77
78 /*
79 * Factors to consider for half-strength driver enable:
80 * - number of DIMMs installed
81 */
82 popts->half_strength_driver_enable = 0;
83}