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/*
* (C) Copyright 2007-2009 DENX Software Engineering
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/mpc512x.h>
/*
* MDDRC Config Runtime Settings
*/
ddr512x_config_t default_mddrc_config = {
.ddr_sys_config = CONFIG_SYS_MDDRC_SYS_CFG,
.ddr_time_config0 = CONFIG_SYS_MDDRC_TIME_CFG0,
.ddr_time_config1 = CONFIG_SYS_MDDRC_TIME_CFG1,
.ddr_time_config2 = CONFIG_SYS_MDDRC_TIME_CFG2,
};
u32 default_init_seq[] = {
CONFIG_SYS_DDRCMD_NOP,
CONFIG_SYS_DDRCMD_NOP,
CONFIG_SYS_DDRCMD_NOP,
CONFIG_SYS_DDRCMD_NOP,
CONFIG_SYS_DDRCMD_NOP,
CONFIG_SYS_DDRCMD_NOP,
CONFIG_SYS_DDRCMD_NOP,
CONFIG_SYS_DDRCMD_NOP,
CONFIG_SYS_DDRCMD_NOP,
CONFIG_SYS_DDRCMD_NOP,
CONFIG_SYS_DDRCMD_PCHG_ALL,
CONFIG_SYS_DDRCMD_NOP,
CONFIG_SYS_DDRCMD_RFSH,
CONFIG_SYS_DDRCMD_NOP,
CONFIG_SYS_DDRCMD_RFSH,
CONFIG_SYS_DDRCMD_NOP,
CONFIG_SYS_MICRON_INIT_DEV_OP,
CONFIG_SYS_DDRCMD_NOP,
CONFIG_SYS_DDRCMD_EM2,
CONFIG_SYS_DDRCMD_NOP,
CONFIG_SYS_DDRCMD_PCHG_ALL,
CONFIG_SYS_DDRCMD_EM2,
CONFIG_SYS_DDRCMD_EM3,
CONFIG_SYS_DDRCMD_EN_DLL,
CONFIG_SYS_MICRON_INIT_DEV_OP,
CONFIG_SYS_DDRCMD_PCHG_ALL,
CONFIG_SYS_DDRCMD_RFSH,
CONFIG_SYS_MICRON_INIT_DEV_OP,
CONFIG_SYS_DDRCMD_OCD_DEFAULT,
CONFIG_SYS_DDRCMD_PCHG_ALL,
CONFIG_SYS_DDRCMD_NOP
};
/*
* fixed sdram init:
* The board doesn't use memory modules that have serial presence
* detect or similar mechanism for discovery of the DRAM settings
*/
long int fixed_sdram(ddr512x_config_t *mddrc_config,
u32 *dram_init_seq, int seq_sz)
{
volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
u32 msize = CONFIG_SYS_MAX_RAM_SIZE;
u32 msize_log2 = __ilog2(msize);
u32 i;
/* take default settings and init sequence if necessary */
if (mddrc_config == NULL)
mddrc_config = &default_mddrc_config;
if (dram_init_seq == NULL) {
dram_init_seq = default_init_seq;
seq_sz = ARRAY_SIZE(default_init_seq);
}
/* Initialize IO Control */
out_be32(&im->io_ctrl.io_control_mem, CONFIG_SYS_IOCTRL_MUX_DDR);
/* Initialize DDR Local Window */
out_be32(&im->sysconf.ddrlaw.bar, CONFIG_SYS_DDR_BASE & 0xFFFFF000);
out_be32(&im->sysconf.ddrlaw.ar, msize_log2 - 1);
sync_law(&im->sysconf.ddrlaw.ar);
/* DDR Enable */
/*
* the "enable" combination: DRAM controller out of reset,
* clock enabled, command mode -- BUT leave CKE low for now
*/
i = MDDRC_SYS_CFG_EN & ~MDDRC_SYS_CFG_CKE_MASK;
out_be32(&im->mddrc.ddr_sys_config, i);
/* maintain 200 microseconds of stable power and clock */
udelay(200);
/* apply a NOP, it shouldn't harm */
out_be32(&im->mddrc.ddr_command, CONFIG_SYS_DDRCMD_NOP);
/* now assert CKE (high) */
i |= MDDRC_SYS_CFG_CKE_MASK;
out_be32(&im->mddrc.ddr_sys_config, i);
/* Initialize DDR Priority Manager */
out_be32(&im->mddrc.prioman_config1, CONFIG_SYS_MDDRCGRP_PM_CFG1);
out_be32(&im->mddrc.prioman_config2, CONFIG_SYS_MDDRCGRP_PM_CFG2);
out_be32(&im->mddrc.hiprio_config, CONFIG_SYS_MDDRCGRP_HIPRIO_CFG);
out_be32(&im->mddrc.lut_table0_main_upper, CONFIG_SYS_MDDRCGRP_LUT0_MU);
out_be32(&im->mddrc.lut_table0_main_lower, CONFIG_SYS_MDDRCGRP_LUT0_ML);
out_be32(&im->mddrc.lut_table1_main_upper, CONFIG_SYS_MDDRCGRP_LUT1_MU);
out_be32(&im->mddrc.lut_table1_main_lower, CONFIG_SYS_MDDRCGRP_LUT1_ML);
out_be32(&im->mddrc.lut_table2_main_upper, CONFIG_SYS_MDDRCGRP_LUT2_MU);
out_be32(&im->mddrc.lut_table2_main_lower, CONFIG_SYS_MDDRCGRP_LUT2_ML);
out_be32(&im->mddrc.lut_table3_main_upper, CONFIG_SYS_MDDRCGRP_LUT3_MU);
out_be32(&im->mddrc.lut_table3_main_lower, CONFIG_SYS_MDDRCGRP_LUT3_ML);
out_be32(&im->mddrc.lut_table4_main_upper, CONFIG_SYS_MDDRCGRP_LUT4_MU);
out_be32(&im->mddrc.lut_table4_main_lower, CONFIG_SYS_MDDRCGRP_LUT4_ML);
out_be32(&im->mddrc.lut_table0_alternate_upper, CONFIG_SYS_MDDRCGRP_LUT0_AU);
out_be32(&im->mddrc.lut_table0_alternate_lower, CONFIG_SYS_MDDRCGRP_LUT0_AL);
out_be32(&im->mddrc.lut_table1_alternate_upper, CONFIG_SYS_MDDRCGRP_LUT1_AU);
out_be32(&im->mddrc.lut_table1_alternate_lower, CONFIG_SYS_MDDRCGRP_LUT1_AL);
out_be32(&im->mddrc.lut_table2_alternate_upper, CONFIG_SYS_MDDRCGRP_LUT2_AU);
out_be32(&im->mddrc.lut_table2_alternate_lower, CONFIG_SYS_MDDRCGRP_LUT2_AL);
out_be32(&im->mddrc.lut_table3_alternate_upper, CONFIG_SYS_MDDRCGRP_LUT3_AU);
out_be32(&im->mddrc.lut_table3_alternate_lower, CONFIG_SYS_MDDRCGRP_LUT3_AL);
out_be32(&im->mddrc.lut_table4_alternate_upper, CONFIG_SYS_MDDRCGRP_LUT4_AU);
out_be32(&im->mddrc.lut_table4_alternate_lower, CONFIG_SYS_MDDRCGRP_LUT4_AL);
/*
* Initialize MDDRC
* put MDDRC in CMD mode and
* set the max time between refreshes to 0 during init process
*/
out_be32(&im->mddrc.ddr_sys_config,
mddrc_config->ddr_sys_config | MDDRC_SYS_CFG_CMD_MASK);
out_be32(&im->mddrc.ddr_time_config0,
mddrc_config->ddr_time_config0 & MDDRC_REFRESH_ZERO_MASK);
out_be32(&im->mddrc.ddr_time_config1,
mddrc_config->ddr_time_config1);
out_be32(&im->mddrc.ddr_time_config2,
mddrc_config->ddr_time_config2);
/* Initialize DDR with either default or supplied init sequence */
for (i = 0; i < seq_sz; i++)
out_be32(&im->mddrc.ddr_command, dram_init_seq[i]);
/* Start MDDRC */
out_be32(&im->mddrc.ddr_time_config0, mddrc_config->ddr_time_config0);
out_be32(&im->mddrc.ddr_sys_config, mddrc_config->ddr_sys_config);
/* Allow for the DLL to startup before accessing data */
udelay(10);
msize = get_ram_size(CONFIG_SYS_DDR_BASE, CONFIG_SYS_MAX_RAM_SIZE);
/* Fix DDR Local Window for new size */
out_be32(&im->sysconf.ddrlaw.ar, __ilog2(msize) - 1);
sync_law(&im->sysconf.ddrlaw.ar);
return msize;
}
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