blob: 692616aed4d88f0f58a65f6a14ceef9c178bd203 [file] [log] [blame]
/*
* Copyright 2012 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 or later as published by the Free Software Foundation.
*/
#include <common.h>
#include <i2c.h>
#include <hwconfig.h>
#include <asm/mmu.h>
#include <asm/fsl_ddr_sdram.h>
#include <asm/fsl_ddr_dimm_params.h>
#include <asm/fsl_law.h>
DECLARE_GLOBAL_DATA_PTR;
struct board_specific_parameters {
u32 n_ranks;
u32 datarate_mhz_high;
u32 clk_adjust;
u32 wrlvl_start;
u32 wrlvl_ctl_2;
u32 wrlvl_ctl_3;
u32 cpo;
u32 write_data_delay;
u32 force_2T;
};
/*
* This table contains all valid speeds we want to override with board
* specific parameters. datarate_mhz_high values need to be in ascending order
* for each n_ranks group.
*/
static const struct board_specific_parameters udimm0[] = {
/*
* memory controller 0
* num| hi| clk| wrlvl | wrlvl | wrlvl | cpo |wrdata|2T
* ranks| mhz|adjst| start | ctl2 | ctl3 | |delay |
*/
{2, 1350, 5, 7, 0x0809090b, 0x0c0c0d09, 0xff, 2, 0},
{2, 1666, 5, 8, 0x080a0a0c, 0x0c0d0e0a, 0xff, 2, 0},
{2, 2140, 5, 8, 0x090a0b0c, 0x0e0f100b, 0xff, 2, 0},
{1, 1350, 5, 8, 0x0809090b, 0x0c0c0d0a, 0xff, 2, 0},
{1, 1700, 5, 8, 0x080a0a0c, 0x0c0d0e0a, 0xff, 2, 0},
{1, 1900, 4, 8, 0x080a0a0c, 0x0e0e0f0a, 0xff, 2, 0},
{1, 2140, 4, 8, 0x090a0b0c, 0x0e0f100b, 0xff, 2, 0},
{}
};
/*
* The three slots have slightly different timing. The center values are good
* for all slots. We use identical speed tables for them. In future use, if
* DIMMs require separated tables, make more entries as needed.
*/
static const struct board_specific_parameters *udimms[] = {
udimm0,
};
static const struct board_specific_parameters rdimm0[] = {
/*
* memory controller 0
* num| hi| clk| wrlvl | wrlvl | wrlvl | cpo |wrdata|2T
* ranks| mhz|adjst| start | ctl2 | ctl3 | |delay |
*/
{4, 1350, 5, 9, 0x08070605, 0x07080805, 0xff, 2, 0},
{4, 1666, 5, 8, 0x08070605, 0x07080805, 0xff, 2, 0},
{4, 2140, 5, 8, 0x08070605, 0x07081805, 0xff, 2, 0},
{2, 1350, 5, 7, 0x0809090b, 0x0c0c0d09, 0xff, 2, 0},
{2, 1666, 5, 8, 0x080a0a0c, 0x0c0d0e0a, 0xff, 2, 0},
{2, 2140, 5, 8, 0x090a0b0c, 0x0e0f100b, 0xff, 2, 0},
{1, 1350, 5, 8, 0x0809090b, 0x0c0c0d0a, 0xff, 2, 0},
{1, 1700, 5, 8, 0x080a0a0c, 0x0c0d0e0a, 0xff, 2, 0},
{1, 1900, 4, 8, 0x080a0a0c, 0x0e0e0f0a, 0xff, 2, 0},
{1, 2140, 4, 8, 0x090a0b0c, 0x0e0f100b, 0xff, 2, 0},
{}
};
/*
* The three slots have slightly different timing. See comments above.
*/
static const struct board_specific_parameters *rdimms[] = {
rdimm0,
};
void fsl_ddr_board_options(memctl_options_t *popts,
dimm_params_t *pdimm,
unsigned int ctrl_num)
{
const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
ulong ddr_freq;
if (ctrl_num > 2) {
printf("Not supported controller number %d\n", ctrl_num);
return;
}
if (!pdimm->n_ranks)
return;
/*
* we use identical timing for all slots. If needed, change the code
* to pbsp = rdimms[ctrl_num] or pbsp = udimms[ctrl_num];
*/
if (popts->registered_dimm_en)
pbsp = rdimms[0];
else
pbsp = udimms[0];
/* 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;
while (pbsp->datarate_mhz_high) {
if (pbsp->n_ranks == pdimm->n_ranks) {
if (ddr_freq <= pbsp->datarate_mhz_high) {
popts->cpo_override = pbsp->cpo;
popts->write_data_delay =
pbsp->write_data_delay;
popts->clk_adjust = pbsp->clk_adjust;
popts->wrlvl_start = pbsp->wrlvl_start;
popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
popts->twoT_en = pbsp->force_2T;
goto found;
}
pbsp_highest = pbsp;
}
pbsp++;
}
if (pbsp_highest) {
printf("Error: board specific timing not found "
"for data rate %lu MT/s\n"
"Trying to use the highest speed (%u) parameters\n",
ddr_freq, pbsp_highest->datarate_mhz_high);
popts->cpo_override = pbsp_highest->cpo;
popts->write_data_delay = pbsp_highest->write_data_delay;
popts->clk_adjust = pbsp_highest->clk_adjust;
popts->wrlvl_start = pbsp_highest->wrlvl_start;
popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
popts->twoT_en = pbsp_highest->force_2T;
} else {
panic("DIMM is not supported by this board");
}
found:
/*
* Factors to consider for half-strength driver enable:
* - number of DIMMs installed
*/
popts->half_strength_driver_enable = 0;
/*
* Write leveling override
*/
popts->wrlvl_override = 1;
popts->wrlvl_sample = 0xf;
/*
* Rtt and Rtt_WR override
*/
popts->rtt_override = 0;
/* Enable ZQ calibration */
popts->zq_en = 1;
/* DHC_EN =1, ODT = 75 Ohm */
popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_75ohm);
popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_75ohm);
}
phys_size_t initdram(int board_type)
{
phys_size_t dram_size;
puts("Initializing....using SPD\n");
dram_size = fsl_ddr_sdram();
dram_size = setup_ddr_tlbs(dram_size / 0x100000);
dram_size *= 0x100000;
puts(" DDR: ");
return dram_size;
}