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/*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2003
* Reinhard Meyer, EMK Elektronik GmbH, r.meyer@emk-elektronik.de
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <mpc5xxx.h>
#include <pci.h>
/*****************************************************************************
* initialize SDRAM/DDRAM controller.
* TBD: get data from I2C EEPROM
*****************************************************************************/
phys_size_t initdram (int board_type)
{
ulong dramsize = 0;
#ifndef CONFIG_SYS_RAMBOOT
#if 0
ulong t;
ulong tap_del;
#endif
#define MODE_EN 0x80000000
#define SOFT_PRE 2
#define SOFT_REF 4
/* configure SDRAM start/end */
*(vu_long *)MPC5XXX_SDRAM_CS0CFG = (CONFIG_SYS_SDRAM_BASE & 0xFFF00000) | CONFIG_SYS_DRAM_RAM_SIZE;
*(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x80000000; /* disabled */
/* setup config registers */
*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = CONFIG_SYS_DRAM_CONFIG1;
*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = CONFIG_SYS_DRAM_CONFIG2;
/* unlock mode register */
*(vu_long *)MPC5XXX_SDRAM_CTRL = CONFIG_SYS_DRAM_CONTROL | MODE_EN;
/* precharge all banks */
*(vu_long *)MPC5XXX_SDRAM_CTRL = CONFIG_SYS_DRAM_CONTROL | MODE_EN | SOFT_PRE;
#ifdef CONFIG_SYS_DRAM_DDR
/* set extended mode register */
*(vu_short *)MPC5XXX_SDRAM_MODE = CONFIG_SYS_DRAM_EMODE;
#endif
/* set mode register */
*(vu_short *)MPC5XXX_SDRAM_MODE = CONFIG_SYS_DRAM_MODE | 0x0400;
/* precharge all banks */
*(vu_long *)MPC5XXX_SDRAM_CTRL = CONFIG_SYS_DRAM_CONTROL | MODE_EN | SOFT_PRE;
/* auto refresh */
*(vu_long *)MPC5XXX_SDRAM_CTRL = CONFIG_SYS_DRAM_CONTROL | MODE_EN | SOFT_REF;
/* set mode register */
*(vu_short *)MPC5XXX_SDRAM_MODE = CONFIG_SYS_DRAM_MODE;
/* normal operation */
*(vu_long *)MPC5XXX_SDRAM_CTRL = CONFIG_SYS_DRAM_CONTROL;
/* write default TAP delay */
*(vu_long *)MPC5XXX_CDM_PORCFG = CONFIG_SYS_DRAM_TAP_DEL << 24;
#if 0
for (tap_del = 0; tap_del < 32; tap_del++)
{
*(vu_long *)MPC5XXX_CDM_PORCFG = tap_del << 24;
printf ("\nTAP Delay:%x Filling DRAM...", *(vu_long *)MPC5XXX_CDM_PORCFG);
for (t = 0; t < 0x04000000; t+=4)
*(vu_long *) t = t;
printf ("Checking DRAM...\n");
for (t = 0; t < 0x04000000; t+=4)
{
ulong rval = *(vu_long *) t;
if (rval != t)
{
printf ("mismatch at %x: ", t);
printf (" 1.read %x", rval);
printf (" 2.read %x", *(vu_long *) t);
printf (" 3.read %x", *(vu_long *) t);
break;
}
}
}
#endif
#endif /* CONFIG_SYS_RAMBOOT */
dramsize = ((1 << (*(vu_long *)MPC5XXX_SDRAM_CS0CFG - 0x13)) << 20);
/* return total ram size */
return dramsize;
}
/*****************************************************************************
* print board identification
*****************************************************************************/
int checkboard (void)
{
#if defined (CONFIG_EVAL5200)
puts ("Board: EMK TOP5200 on EVAL5200\n");
#else
#if defined (CONFIG_LITE5200)
puts ("Board: LITE5200\n");
#else
#if defined (CONFIG_MINI5200)
puts ("Board: EMK TOP5200 on MINI5200\n");
#else
puts ("Board: EMK TOP5200\n");
#endif
#endif
#endif
return 0;
}
/*****************************************************************************
* prepare for FLASH detection
*****************************************************************************/
void flash_preinit(void)
{
/*
* Now, when we are in RAM, enable flash write
* access for detection process.
* Note that CS_BOOT cannot be cleared when
* executing in flash.
*/
*(vu_long *)MPC5XXX_BOOTCS_CFG &= ~0x1; /* clear RO */
}
/*****************************************************************************
* finalize FLASH setup
*****************************************************************************/
void flash_afterinit(uint bank, ulong start, ulong size)
{
if (bank == 0) { /* adjust mapping */
*(vu_long *)MPC5XXX_BOOTCS_START =
*(vu_long *)MPC5XXX_CS0_START = START_REG(start);
*(vu_long *)MPC5XXX_BOOTCS_STOP =
*(vu_long *)MPC5XXX_CS0_STOP = STOP_REG(start, size);
}
}
/*****************************************************************************
* otherinits after RAM is there and we are relocated to RAM
* note: though this is an int function, nobody cares for the result!
*****************************************************************************/
int misc_init_r (void)
{
#if !defined (CONFIG_LITE5200)
/* read 'factory' part of EEPROM */
extern void read_factory_r (void);
read_factory_r ();
#endif
return (0);
}
/*****************************************************************************
* initialize the PCI system
*****************************************************************************/
#ifdef CONFIG_PCI
static struct pci_controller hose;
extern void pci_mpc5xxx_init(struct pci_controller *);
void pci_init_board(void)
{
pci_mpc5xxx_init(&hose);
}
#endif
/*****************************************************************************
* provide the IDE Reset Function
*****************************************************************************/
#if defined(CONFIG_CMD_IDE) && defined(CONFIG_IDE_RESET)
void init_ide_reset (void)
{
debug ("init_ide_reset\n");
/* Configure PSC1_4 as GPIO output for ATA reset */
*(vu_long *) MPC5XXX_WU_GPIO_ENABLE |= GPIO_PSC1_4;
*(vu_long *) MPC5XXX_WU_GPIO_DIR |= GPIO_PSC1_4;
}
void ide_set_reset (int idereset)
{
debug ("ide_reset(%d)\n", idereset);
if (idereset) {
*(vu_long *) MPC5XXX_WU_GPIO_DATA_O &= ~GPIO_PSC1_4;
} else {
*(vu_long *) MPC5XXX_WU_GPIO_DATA_O |= GPIO_PSC1_4;
}
}
#endif
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