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/*
* Copyright 2009-2011 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 <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;
/*
* Fixed sdram init -- doesn't use serial presence detect.
*/
extern fixed_ddr_parm_t fixed_ddr_parm_0[];
#if (CONFIG_NUM_DDR_CONTROLLERS == 2)
extern fixed_ddr_parm_t fixed_ddr_parm_1[];
#endif
phys_size_t fixed_sdram(void)
{
int i;
char buf[32];
fsl_ddr_cfg_regs_t ddr_cfg_regs;
phys_size_t ddr_size;
unsigned int lawbar1_target_id;
ulong ddr_freq, ddr_freq_mhz;
ddr_freq = get_ddr_freq(0);
ddr_freq_mhz = ddr_freq / 1000000;
printf("Configuring DDR for %s MT/s data rate\n",
strmhz(buf, ddr_freq));
for (i = 0; fixed_ddr_parm_0[i].max_freq > 0; i++) {
if ((ddr_freq_mhz > fixed_ddr_parm_0[i].min_freq) &&
(ddr_freq_mhz <= fixed_ddr_parm_0[i].max_freq)) {
memcpy(&ddr_cfg_regs,
fixed_ddr_parm_0[i].ddr_settings,
sizeof(ddr_cfg_regs));
break;
}
}
if (fixed_ddr_parm_0[i].max_freq == 0)
panic("Unsupported DDR data rate %s MT/s data rate\n",
strmhz(buf, ddr_freq));
ddr_size = (phys_size_t) CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
ddr_cfg_regs.ddr_cdr1 = DDR_CDR1_DHC_EN;
fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0);
#if (CONFIG_NUM_DDR_CONTROLLERS == 2)
memcpy(&ddr_cfg_regs,
fixed_ddr_parm_1[i].ddr_settings,
sizeof(ddr_cfg_regs));
ddr_cfg_regs.ddr_cdr1 = DDR_CDR1_DHC_EN;
fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 1);
#endif
/*
* setup laws for DDR. If not interleaving, presuming half memory on
* DDR1 and the other half on DDR2
*/
if (fixed_ddr_parm_0[i].ddr_settings->cs[0].config & 0x20000000) {
if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
ddr_size,
LAW_TRGT_IF_DDR_INTRLV) < 0) {
printf("ERROR setting Local Access Windows for DDR\n");
return 0;
}
} else {
#if (CONFIG_NUM_DDR_CONTROLLERS == 2)
/* We require both controllers have identical DIMMs */
lawbar1_target_id = LAW_TRGT_IF_DDR_1;
if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
ddr_size / 2,
lawbar1_target_id) < 0) {
printf("ERROR setting Local Access Windows for DDR\n");
return 0;
}
lawbar1_target_id = LAW_TRGT_IF_DDR_2;
if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE + ddr_size / 2,
ddr_size / 2,
lawbar1_target_id) < 0) {
printf("ERROR setting Local Access Windows for DDR\n");
return 0;
}
#else
lawbar1_target_id = LAW_TRGT_IF_DDR_1;
if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
ddr_size,
lawbar1_target_id) < 0) {
printf("ERROR setting Local Access Windows for DDR\n");
return 0;
}
#endif
}
return ddr_size;
}
struct board_specific_parameters {
u32 n_ranks;
u32 datarate_mhz_high;
u32 clk_adjust;
u32 wrlvl_start;
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 | cpo |wrdata|2T
* ranks| mhz|adjst| start | |delay |
*/
{4, 850, 4, 6, 0xff, 2, 0},
{4, 950, 5, 7, 0xff, 2, 0},
{4, 1050, 5, 8, 0xff, 2, 0},
{4, 1250, 5, 10, 0xff, 2, 0},
{4, 1350, 5, 11, 0xff, 2, 0},
{4, 1666, 5, 12, 0xff, 2, 0},
{2, 850, 5, 6, 0xff, 2, 0},
{2, 1050, 5, 7, 0xff, 2, 0},
{2, 1250, 4, 6, 0xff, 2, 0},
{2, 1350, 5, 7, 0xff, 2, 0},
{2, 1666, 5, 8, 0xff, 2, 0},
{1, 1250, 4, 6, 0xff, 2, 0},
{1, 1335, 4, 7, 0xff, 2, 0},
{1, 1666, 4, 8, 0xff, 2, 0},
{}
};
/*
* The two slots have slightly different timing. The center values are good
* for both slots. We use identical speed tables for them. In future use, if
* DIMMs have fewer center values that require two separated tables, copy the
* udimm0 table to udimm1 and make changes to clk_adjust and wrlvl_start.
*/
static const struct board_specific_parameters *udimms[] = {
udimm0,
udimm0,
};
static const struct board_specific_parameters rdimm0[] = {
/*
* memory controller 0
* num| hi| clk| wrlvl | cpo |wrdata|2T
* ranks| mhz|adjst| start | |delay |
*/
{4, 850, 4, 6, 0xff, 2, 0},
{4, 950, 5, 7, 0xff, 2, 0},
{4, 1050, 5, 8, 0xff, 2, 0},
{4, 1250, 5, 10, 0xff, 2, 0},
{4, 1350, 5, 11, 0xff, 2, 0},
{4, 1666, 5, 12, 0xff, 2, 0},
{2, 850, 4, 6, 0xff, 2, 0},
{2, 1050, 4, 7, 0xff, 2, 0},
{2, 1666, 4, 8, 0xff, 2, 0},
{1, 850, 4, 5, 0xff, 2, 0},
{1, 950, 4, 7, 0xff, 2, 0},
{1, 1666, 4, 8, 0xff, 2, 0},
{}
};
/*
* The two slots have slightly different timing. See comments above.
*/
static const struct board_specific_parameters *rdimms[] = {
rdimm0,
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 > 1) {
printf("Wrong parameter for controller number %d", ctrl_num);
return;
}
if (!pdimm->n_ranks)
return;
if (popts->registered_dimm_en)
pbsp = rdimms[ctrl_num];
else
pbsp = udimms[ctrl_num];
/* 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->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->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 = 60 Ohm */
popts->ddr_cdr1 = DDR_CDR1_DHC_EN;
}
phys_size_t initdram(int board_type)
{
phys_size_t dram_size;
puts("Initializing....");
if (fsl_use_spd()) {
puts("using SPD\n");
dram_size = fsl_ddr_sdram();
} else {
puts("using fixed parameters\n");
dram_size = fixed_sdram();
}
dram_size = setup_ddr_tlbs(dram_size / 0x100000);
dram_size *= 0x100000;
debug(" DDR: ");
return dram_size;
}
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