mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 08:57:58 +00:00
1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
165 lines
4 KiB
C
165 lines
4 KiB
C
/*
|
|
* Author :
|
|
* Vaibhav Hiremath <hvaibhav@ti.com>
|
|
*
|
|
* Based on mem.c and sdrc.c
|
|
*
|
|
* Copyright (C) 2010
|
|
* Texas Instruments Incorporated - http://www.ti.com/
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/mem.h>
|
|
#include <asm/arch/sys_proto.h>
|
|
#include <asm/arch/emif4.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
extern omap3_sysinfo sysinfo;
|
|
|
|
static emif4_t *emif4_base = (emif4_t *)OMAP34XX_SDRC_BASE;
|
|
|
|
/*
|
|
* is_mem_sdr -
|
|
* - Return 1 if mem type in use is SDR
|
|
*/
|
|
u32 is_mem_sdr(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* get_sdr_cs_size -
|
|
* - Get size of chip select 0/1
|
|
*/
|
|
u32 get_sdr_cs_size(u32 cs)
|
|
{
|
|
u32 size = 0;
|
|
|
|
/* TODO: Calculate the size based on EMIF4 configuration */
|
|
if (cs == CS0)
|
|
size = CONFIG_SYS_CS0_SIZE;
|
|
|
|
return size;
|
|
}
|
|
|
|
/*
|
|
* get_sdr_cs_offset -
|
|
* - Get offset of cs from cs0 start
|
|
*/
|
|
u32 get_sdr_cs_offset(u32 cs)
|
|
{
|
|
u32 offset = 0;
|
|
|
|
return offset;
|
|
}
|
|
|
|
/*
|
|
* do_emif4_init -
|
|
* - Init the emif4 module for DDR access
|
|
* - Early init routines, called from flash or SRAM.
|
|
*/
|
|
void do_emif4_init(void)
|
|
{
|
|
unsigned int regval;
|
|
/* Set the DDR PHY parameters in PHY ctrl registers */
|
|
regval = (EMIF4_DDR1_READ_LAT | EMIF4_DDR1_PWRDN_DIS |
|
|
EMIF4_DDR1_EXT_STRB_DIS);
|
|
writel(regval, &emif4_base->ddr_phyctrl1);
|
|
writel(regval, &emif4_base->ddr_phyctrl1_shdw);
|
|
writel(0, &emif4_base->ddr_phyctrl2);
|
|
|
|
/* Reset the DDR PHY and wait till completed */
|
|
regval = readl(&emif4_base->sdram_iodft_tlgc);
|
|
regval |= (1<<10);
|
|
writel(regval, &emif4_base->sdram_iodft_tlgc);
|
|
/*Wait till that bit clears*/
|
|
while ((readl(&emif4_base->sdram_iodft_tlgc) & (1<<10)) == 0x1);
|
|
/*Re-verify the DDR PHY status*/
|
|
while ((readl(&emif4_base->sdram_sts) & (1<<2)) == 0x0);
|
|
|
|
regval |= (1<<0);
|
|
writel(regval, &emif4_base->sdram_iodft_tlgc);
|
|
/* Set SDR timing registers */
|
|
regval = (EMIF4_TIM1_T_WTR | EMIF4_TIM1_T_RRD |
|
|
EMIF4_TIM1_T_RC | EMIF4_TIM1_T_RAS |
|
|
EMIF4_TIM1_T_WR | EMIF4_TIM1_T_RCD |
|
|
EMIF4_TIM1_T_RP);
|
|
writel(regval, &emif4_base->sdram_time1);
|
|
writel(regval, &emif4_base->sdram_time1_shdw);
|
|
|
|
regval = (EMIF4_TIM2_T_CKE | EMIF4_TIM2_T_RTP |
|
|
EMIF4_TIM2_T_XSRD | EMIF4_TIM2_T_XSNR |
|
|
EMIF4_TIM2_T_ODT | EMIF4_TIM2_T_XP);
|
|
writel(regval, &emif4_base->sdram_time2);
|
|
writel(regval, &emif4_base->sdram_time2_shdw);
|
|
|
|
regval = (EMIF4_TIM3_T_RAS_MAX | EMIF4_TIM3_T_RFC);
|
|
writel(regval, &emif4_base->sdram_time3);
|
|
writel(regval, &emif4_base->sdram_time3_shdw);
|
|
|
|
/* Set the PWR control register */
|
|
regval = (EMIF4_PWR_PM_TIM | EMIF4_PWR_LP_MODE |
|
|
EMIF4_PWR_DPD_DIS | EMIF4_PWR_IDLE_MODE);
|
|
writel(regval, &emif4_base->sdram_pwr_mgmt);
|
|
writel(regval, &emif4_base->sdram_pwr_mgmt_shdw);
|
|
|
|
/* Set the DDR refresh rate control register */
|
|
regval = (EMIF4_REFRESH_RATE | EMIF4_INITREF_DIS);
|
|
writel(regval, &emif4_base->sdram_refresh_ctrl);
|
|
writel(regval, &emif4_base->sdram_refresh_ctrl_shdw);
|
|
|
|
/* set the SDRAM configuration register */
|
|
regval = (EMIF4_CFG_PGSIZE | EMIF4_CFG_EBANK |
|
|
EMIF4_CFG_IBANK | EMIF4_CFG_ROWSIZE |
|
|
EMIF4_CFG_CL | EMIF4_CFG_NARROW_MD |
|
|
EMIF4_CFG_SDR_DRV | EMIF4_CFG_DDR_DIS_DLL |
|
|
EMIF4_CFG_DDR2_DDQS | EMIF4_CFG_DDR_TERM |
|
|
EMIF4_CFG_IBANK_POS | EMIF4_CFG_SDRAM_TYP);
|
|
writel(regval, &emif4_base->sdram_config);
|
|
}
|
|
|
|
/*
|
|
* dram_init -
|
|
* - Sets uboots idea of sdram size
|
|
*/
|
|
int dram_init(void)
|
|
{
|
|
unsigned int size0 = 0, size1 = 0;
|
|
|
|
size0 = get_sdr_cs_size(CS0);
|
|
/*
|
|
* If a second bank of DDR is attached to CS1 this is
|
|
* where it can be started. Early init code will init
|
|
* memory on CS0.
|
|
*/
|
|
if ((sysinfo.mtype == DDR_COMBO) || (sysinfo.mtype == DDR_STACKED))
|
|
size1 = get_sdr_cs_size(CS1);
|
|
|
|
gd->ram_size = size0 + size1;
|
|
return 0;
|
|
}
|
|
|
|
void dram_init_banksize (void)
|
|
{
|
|
unsigned int size0 = 0, size1 = 0;
|
|
|
|
size0 = get_sdr_cs_size(CS0);
|
|
size1 = get_sdr_cs_size(CS1);
|
|
|
|
gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
|
|
gd->bd->bi_dram[0].size = size0;
|
|
gd->bd->bi_dram[1].start = PHYS_SDRAM_1 + get_sdr_cs_offset(CS1);
|
|
gd->bd->bi_dram[1].size = size1;
|
|
}
|
|
|
|
/*
|
|
* mem_init() -
|
|
* - Initialize memory subsystem
|
|
*/
|
|
void mem_init(void)
|
|
{
|
|
do_emif4_init();
|
|
}
|