Update Freescale copyrights to remove "All Rights Reserved"
[oweals/u-boot.git] / board / freescale / mpc8569mds / ddr.c
1 /*
2  * Copyright 2009 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>
13 #include <asm/fsl_ddr_dimm_params.h>
14
15 static void
16 get_spd(ddr3_spd_eeprom_t *spd, unsigned char i2c_address)
17 {
18         i2c_read(i2c_address, 0, 1, (uchar *)spd, sizeof(ddr3_spd_eeprom_t));
19 }
20
21
22 unsigned int fsl_ddr_get_mem_data_rate(void)
23 {
24         return get_ddr_freq(0);
25 }
26
27 void fsl_ddr_get_spd(ddr3_spd_eeprom_t *ctrl_dimms_spd,
28                       unsigned int ctrl_num)
29 {
30         unsigned int i;
31         unsigned int i2c_address = 0;
32
33         for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) {
34                 if (ctrl_num == 0 && i == 0)
35                         i2c_address = SPD_EEPROM_ADDRESS1;
36                 if (ctrl_num == 0 && i == 1)
37                         i2c_address = SPD_EEPROM_ADDRESS2;
38                 get_spd(&(ctrl_dimms_spd[i]), i2c_address);
39         }
40 }
41
42 void fsl_ddr_board_options(memctl_options_t *popts,
43                                 dimm_params_t *pdimm,
44                                 unsigned int ctrl_num)
45 {
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 = 4;
58
59         /*
60          * Factors to consider for CPO:
61          *      - frequency
62          *      - ddr1 vs. ddr2
63          */
64         popts->cpo_override = 0xff;
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 = 2;
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 }