2 * Copyright 2008 Freescale Semiconductor, Inc.
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.
12 #include <asm/fsl_ddr_sdram.h>
13 #include <asm/fsl_ddr_dimm_params.h>
16 get_spd(ddr2_spd_eeprom_t *spd, unsigned char i2c_address)
18 i2c_read(i2c_address, 0, 1, (uchar *)spd, sizeof(ddr2_spd_eeprom_t));
20 /* We use soldered memory, but use an SPD EEPROM to describe it.
21 * The SPD has an unspecified dimm type, but the DDR2 initialization
22 * code requires a specific type to be specified. This sets the type
23 * as a standard unregistered SO-DIMM. */
24 if (spd->dimm_type == 0) {
26 ((uchar *)spd)[63] += 0x4;
30 void fsl_ddr_get_spd(ddr2_spd_eeprom_t *ctrl_dimms_spd,
31 unsigned int ctrl_num)
36 printf("%s: invalid ctrl_num = %d\n", __func__, ctrl_num);
40 for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++)
41 get_spd(&(ctrl_dimms_spd[i]), SPD_EEPROM_ADDRESS);
44 void fsl_ddr_board_options(memctl_options_t *popts,
46 unsigned int ctrl_num)
49 * Factors to consider for clock adjust:
50 * - number of chips on bus
55 * This needs to be determined on a board-by-board basis.
59 popts->clk_adjust = 7;
62 * Factors to consider for CPO:
66 popts->cpo_override = 9;
69 * Factors to consider for write data delay:
79 popts->write_data_delay = 3;
82 * Factors to consider for half-strength driver enable:
83 * - number of DIMMs installed
85 popts->half_strength_driver_enable = 0;