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/*
* Copyright 2010 Freescale Semiconductor, Inc.
* Authors: Srikanth Srinivasan <srikanth.srinivasan@freescale.com>
* Timur Tabi <timur@freescale.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*/
#include <common.h>
#include <asm/fsl_ddr_sdram.h>
#include <asm/fsl_ddr_dimm_params.h>
typedef struct {
u32 datarate_mhz_low;
u32 datarate_mhz_high;
u32 n_ranks;
u32 clk_adjust; /* Range: 0-8 */
u32 cpo; /* Range: 2-31 */
u32 write_data_delay; /* Range: 0-6 */
u32 force_2T;
} board_specific_parameters_t;
static const board_specific_parameters_t bsp[] = {
/*
* lo| hi| num| clk| cpo|wrdata|2T
* mhz| mhz|ranks|adjst| | delay|
*/
{ 0, 333, 1, 5, 31, 3, 0},
{334, 400, 1, 5, 31, 3, 0},
{401, 549, 1, 5, 31, 3, 0},
{550, 680, 1, 5, 31, 5, 0},
{681, 850, 1, 5, 31, 5, 0},
{ 0, 333, 2, 5, 31, 3, 0},
{334, 400, 2, 5, 31, 3, 0},
{401, 549, 2, 5, 31, 3, 0},
{550, 680, 2, 5, 31, 5, 0},
{681, 850, 2, 5, 31, 5, 0},
};
void fsl_ddr_board_options(memctl_options_t *popts, dimm_params_t *pdimm,
unsigned int ctrl_num)
{
unsigned long ddr_freq;
unsigned int i;
/* set odt_rd_cfg and odt_wr_cfg. */
for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
popts->cs_local_opts[i].odt_rd_cfg = 0;
popts->cs_local_opts[i].odt_wr_cfg = 1;
}
/*
* Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr
* freqency and n_banks specified in board_specific_parameters table.
*/
ddr_freq = get_ddr_freq(0) / 1000000;
for (i = 0; i < ARRAY_SIZE(bsp); i++) {
if (ddr_freq >= bsp[i].datarate_mhz_low &&
ddr_freq <= bsp[i].datarate_mhz_high &&
pdimm->n_ranks == bsp[i].n_ranks) {
popts->clk_adjust = bsp[i].clk_adjust;
popts->cpo_override = bsp[i].cpo;
popts->write_data_delay = bsp[i].write_data_delay;
popts->twoT_en = bsp[i].force_2T;
break;
}
}
popts->half_strength_driver_enable = 1;
/* Per AN4039, enable ZQ calibration. */
popts->zq_en = 1;
/*
* For wake-up on ARP, we need auto self refresh enabled
*/
popts->auto_self_refresh_en = 1;
popts->sr_it = 0xb;
}
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