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/*
* emif4.c
*
* AM33XX emif4 configuration file
*
* Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the
* GNU General Public License for more details.
*/
#include <common.h>
#include <asm/arch/cpu.h>
#include <asm/arch/ddr_defs.h>
#include <asm/arch/hardware.h>
#include <asm/arch/clock.h>
#include <asm/arch/sys_proto.h>
#include <asm/io.h>
#include <asm/emif.h>
DECLARE_GLOBAL_DATA_PTR;
int dram_init(void)
{
/* dram_init must store complete ramsize in gd->ram_size */
gd->ram_size = get_ram_size(
(void *)CONFIG_SYS_SDRAM_BASE,
CONFIG_MAX_RAM_BANK_SIZE);
return 0;
}
void dram_init_banksize(void)
{
gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
gd->bd->bi_dram[0].size = gd->ram_size;
}
#ifdef CONFIG_SPL_BUILD
static struct vtp_reg *vtpreg = (struct vtp_reg *)VTP0_CTRL_ADDR;
static struct ddr_ctrl *ddrctrl = (struct ddr_ctrl *)DDR_CTRL_ADDR;
static const struct ddr_data ddr2_data = {
.datardsratio0 = ((DDR2_RD_DQS<<30)|(DDR2_RD_DQS<<20)
|(DDR2_RD_DQS<<10)|(DDR2_RD_DQS<<0)),
.datawdsratio0 = ((DDR2_WR_DQS<<30)|(DDR2_WR_DQS<<20)
|(DDR2_WR_DQS<<10)|(DDR2_WR_DQS<<0)),
.datawiratio0 = ((DDR2_PHY_WRLVL<<30)|(DDR2_PHY_WRLVL<<20)
|(DDR2_PHY_WRLVL<<10)|(DDR2_PHY_WRLVL<<0)),
.datagiratio0 = ((DDR2_PHY_GATELVL<<30)|(DDR2_PHY_GATELVL<<20)
|(DDR2_PHY_GATELVL<<10)|(DDR2_PHY_GATELVL<<0)),
.datafwsratio0 = ((DDR2_PHY_FIFO_WE<<30)|(DDR2_PHY_FIFO_WE<<20)
|(DDR2_PHY_FIFO_WE<<10)|(DDR2_PHY_FIFO_WE<<0)),
.datawrsratio0 = ((DDR2_PHY_WR_DATA<<30)|(DDR2_PHY_WR_DATA<<20)
|(DDR2_PHY_WR_DATA<<10)|(DDR2_PHY_WR_DATA<<0)),
.datauserank0delay = DDR2_PHY_RANK0_DELAY,
.datadldiff0 = PHY_DLL_LOCK_DIFF,
};
static const struct cmd_control ddr2_cmd_ctrl_data = {
.cmd0csratio = DDR2_RATIO,
.cmd0dldiff = DDR2_DLL_LOCK_DIFF,
.cmd0iclkout = DDR2_INVERT_CLKOUT,
.cmd1csratio = DDR2_RATIO,
.cmd1dldiff = DDR2_DLL_LOCK_DIFF,
.cmd1iclkout = DDR2_INVERT_CLKOUT,
.cmd2csratio = DDR2_RATIO,
.cmd2dldiff = DDR2_DLL_LOCK_DIFF,
.cmd2iclkout = DDR2_INVERT_CLKOUT,
};
static const struct emif_regs ddr2_emif_reg_data = {
.sdram_config = DDR2_EMIF_SDCFG,
.ref_ctrl = DDR2_EMIF_SDREF,
.sdram_tim1 = DDR2_EMIF_TIM1,
.sdram_tim2 = DDR2_EMIF_TIM2,
.sdram_tim3 = DDR2_EMIF_TIM3,
.emif_ddr_phy_ctlr_1 = DDR2_EMIF_READ_LATENCY,
};
static void config_vtp(void)
{
writel(readl(&vtpreg->vtp0ctrlreg) | VTP_CTRL_ENABLE,
&vtpreg->vtp0ctrlreg);
writel(readl(&vtpreg->vtp0ctrlreg) & (~VTP_CTRL_START_EN),
&vtpreg->vtp0ctrlreg);
writel(readl(&vtpreg->vtp0ctrlreg) | VTP_CTRL_START_EN,
&vtpreg->vtp0ctrlreg);
/* Poll for READY */
while ((readl(&vtpreg->vtp0ctrlreg) & VTP_CTRL_READY) !=
VTP_CTRL_READY)
;
}
void config_ddr(short ddr_type)
{
enable_emif_clocks();
if (ddr_type == EMIF_REG_SDRAM_TYPE_DDR2) {
ddr_pll_config(266);
config_vtp();
config_cmd_ctrl(&ddr2_cmd_ctrl_data);
config_ddr_data(0, &ddr2_data);
config_ddr_data(1, &ddr2_data);
config_io_ctrl(DDR2_IOCTRL_VALUE);
/* Set CKE to be controlled by EMIF/DDR PHY */
writel(DDR_CKE_CTRL_NORMAL, &ddrctrl->ddrckectrl);
/* Program EMIF instance */
config_ddr_phy(&ddr2_emif_reg_data);
set_sdram_timings(&ddr2_emif_reg_data);
config_sdram(&ddr2_emif_reg_data);
}
}
#endif
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