u-boot/arch/arm/cpu/armv7/am33xx/emif4.c
Dave Gerlach b56b9a0884 ARM: AM43xx: Change DDR3 Reset Value
The bit DDR3_RST_DEF_VAL inside CTRL_DDR_IO represents the default value
of the ddr reset value for DDR3 before the EMIF takes over. We must have
this bit set high so that on exit from DeepSleep0 within the kernel the
reset line has the proper value.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
2014-03-04 09:42:07 -05:00

132 lines
3.3 KiB
C

/*
* emif4.c
*
* AM33XX emif4 configuration file
*
* Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
*
* SPDX-License-Identifier: GPL-2.0+
*/
#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;
}
#if defined(CONFIG_SPL_BUILD) || defined(CONFIG_NOR_BOOT)
#ifdef CONFIG_TI81XX
static struct dmm_lisa_map_regs *hw_lisa_map_regs =
(struct dmm_lisa_map_regs *)DMM_BASE;
#endif
#ifndef CONFIG_TI816X
static struct vtp_reg *vtpreg[2] = {
(struct vtp_reg *)VTP0_CTRL_ADDR,
(struct vtp_reg *)VTP1_CTRL_ADDR};
#endif
#ifdef CONFIG_AM33XX
static struct ddr_ctrl *ddrctrl = (struct ddr_ctrl *)DDR_CTRL_ADDR;
#endif
#ifdef CONFIG_AM43XX
static struct ddr_ctrl *ddrctrl = (struct ddr_ctrl *)DDR_CTRL_ADDR;
static struct cm_device_inst *cm_device =
(struct cm_device_inst *)CM_DEVICE_INST;
#endif
#ifdef CONFIG_TI81XX
void config_dmm(const struct dmm_lisa_map_regs *regs)
{
enable_dmm_clocks();
writel(0, &hw_lisa_map_regs->dmm_lisa_map_3);
writel(0, &hw_lisa_map_regs->dmm_lisa_map_2);
writel(0, &hw_lisa_map_regs->dmm_lisa_map_1);
writel(0, &hw_lisa_map_regs->dmm_lisa_map_0);
writel(regs->dmm_lisa_map_3, &hw_lisa_map_regs->dmm_lisa_map_3);
writel(regs->dmm_lisa_map_2, &hw_lisa_map_regs->dmm_lisa_map_2);
writel(regs->dmm_lisa_map_1, &hw_lisa_map_regs->dmm_lisa_map_1);
writel(regs->dmm_lisa_map_0, &hw_lisa_map_regs->dmm_lisa_map_0);
}
#endif
#ifndef CONFIG_TI816X
static void config_vtp(int nr)
{
writel(readl(&vtpreg[nr]->vtp0ctrlreg) | VTP_CTRL_ENABLE,
&vtpreg[nr]->vtp0ctrlreg);
writel(readl(&vtpreg[nr]->vtp0ctrlreg) & (~VTP_CTRL_START_EN),
&vtpreg[nr]->vtp0ctrlreg);
writel(readl(&vtpreg[nr]->vtp0ctrlreg) | VTP_CTRL_START_EN,
&vtpreg[nr]->vtp0ctrlreg);
/* Poll for READY */
while ((readl(&vtpreg[nr]->vtp0ctrlreg) & VTP_CTRL_READY) !=
VTP_CTRL_READY)
;
}
#endif
void __weak ddr_pll_config(unsigned int ddrpll_m)
{
}
void config_ddr(unsigned int pll, const struct ctrl_ioregs *ioregs,
const struct ddr_data *data, const struct cmd_control *ctrl,
const struct emif_regs *regs, int nr)
{
ddr_pll_config(pll);
#ifndef CONFIG_TI816X
config_vtp(nr);
#endif
config_cmd_ctrl(ctrl, nr);
config_ddr_data(data, nr);
#ifdef CONFIG_AM33XX
config_io_ctrl(ioregs);
/* Set CKE to be controlled by EMIF/DDR PHY */
writel(DDR_CKE_CTRL_NORMAL, &ddrctrl->ddrckectrl);
#endif
#ifdef CONFIG_AM43XX
writel(readl(&cm_device->cm_dll_ctrl) & ~0x1, &cm_device->cm_dll_ctrl);
while ((readl(&cm_device->cm_dll_ctrl) && CM_DLL_READYST) == 0)
;
writel(0x80000000, &ddrctrl->ddrioctrl);
config_io_ctrl(ioregs);
/* Set CKE to be controlled by EMIF/DDR PHY */
writel(DDR_CKE_CTRL_NORMAL, &ddrctrl->ddrckectrl);
#endif
/* Program EMIF instance */
config_ddr_phy(regs, nr);
set_sdram_timings(regs, nr);
if (get_emif_rev(EMIF1_BASE) == EMIF_4D5)
config_sdram_emif4d5(regs, nr);
else
config_sdram(regs, nr);
}
#endif