mirror of
https://github.com/smaeul/u-boot.git
synced 2025-11-04 14:00:19 +00:00
71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
/*
|
|
* Copyright 2008 Freescale Semiconductor, Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* Version 2 as published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <i2c.h>
|
|
|
|
#include <asm/fsl_ddr_sdram.h>
|
|
|
|
static void
|
|
get_spd(ddr1_spd_eeprom_t *spd, unsigned char i2c_address)
|
|
{
|
|
i2c_read(i2c_address, 0, 1, (uchar *)spd, sizeof(ddr1_spd_eeprom_t));
|
|
}
|
|
|
|
|
|
unsigned int
|
|
fsl_ddr_get_mem_data_rate(void)
|
|
{
|
|
return get_ddr_freq(0);
|
|
}
|
|
|
|
|
|
void
|
|
fsl_ddr_get_spd(ddr1_spd_eeprom_t *ctrl_dimms_spd,
|
|
unsigned int ctrl_num)
|
|
{
|
|
unsigned int i;
|
|
unsigned int i2c_address = 0;
|
|
|
|
for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) {
|
|
if (ctrl_num == 0 && i == 0) {
|
|
i2c_address = SPD_EEPROM_ADDRESS;
|
|
}
|
|
get_spd(&(ctrl_dimms_spd[i]), i2c_address);
|
|
}
|
|
}
|
|
|
|
void fsl_ddr_board_options(memctl_options_t *popts, unsigned int ctrl_num)
|
|
{
|
|
/*
|
|
* Factors to consider for CPO:
|
|
* - frequency
|
|
* - ddr1 vs. ddr2
|
|
*/
|
|
popts->cpo_override = 0;
|
|
|
|
/*
|
|
* Factors to consider for write data delay:
|
|
* - number of DIMMs
|
|
*
|
|
* 1 = 1/4 clock delay
|
|
* 2 = 1/2 clock delay
|
|
* 3 = 3/4 clock delay
|
|
* 4 = 1 clock delay
|
|
* 5 = 5/4 clock delay
|
|
* 6 = 3/2 clock delay
|
|
*/
|
|
popts->write_data_delay = 3;
|
|
|
|
/*
|
|
* Factors to consider for half-strength driver enable:
|
|
* - number of DIMMs installed
|
|
*/
|
|
popts->half_strength_driver_enable = 0;
|
|
}
|