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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
*****************************************************************************/
long int initdram (int board_type)
{
ulong dramsize = 0;
#ifndef CFG_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 = (CFG_SDRAM_BASE & 0xFFF00000) | CFG_DRAM_RAM_SIZE;
*(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x80000000; /* disabled */
/* setup config registers */
*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = CFG_DRAM_CONFIG1;
*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = CFG_DRAM_CONFIG2;
/* unlock mode register */
*(vu_long *)MPC5XXX_SDRAM_CTRL = CFG_DRAM_CONTROL | MODE_EN;
/* precharge all banks */
*(vu_long *)MPC5XXX_SDRAM_CTRL = CFG_DRAM_CONTROL | MODE_EN | SOFT_PRE;
#if CFG_DRAM_DDR
/* set extended mode register */
*(vu_short *)MPC5XXX_SDRAM_MODE = CFG_DRAM_EMODE;
#endif
/* set mode register */
*(vu_short *)MPC5XXX_SDRAM_MODE = CFG_DRAM_MODE | 0x0400;
/* precharge all banks */
*(vu_long *)MPC5XXX_SDRAM_CTRL = CFG_DRAM_CONTROL | MODE_EN | SOFT_PRE;
/* auto refresh */
*(vu_long *)MPC5XXX_SDRAM_CTRL = CFG_DRAM_CONTROL | MODE_EN | SOFT_REF;
/* set mode register */
*(vu_short *)MPC5XXX_SDRAM_MODE = CFG_DRAM_MODE;
/* normal operation */
*(vu_long *)MPC5XXX_SDRAM_CTRL = CFG_DRAM_CONTROL;
/* write default TAP delay */
*(vu_long *)MPC5XXX_CDM_PORCFG = CFG_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 /* CFG_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_MINI5200)
puts ("Board: EMK TOP5200 on MINI5200\n");
#else
puts ("Board: EMK TOP5200\n");
#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)
{
/* read 'factory' part of EEPROM */
uchar buf[81];
uchar *p;
uint length;
uint addr;
uint len;
/* get length first */
addr = CFG_FACT_OFFSET;
if (eeprom_read (CFG_I2C_FACT_ADDR, addr, buf, 2)) {
bailout:
printf ("cannot read factory configuration\n");
printf ("be sure to set ethaddr yourself!\n");
return 0;
}
length = buf[0] + (buf[1] << 8);
addr += 2;
/* sanity check */
if (length < 20 || length > CFG_FACT_SIZE - 2)
goto bailout;
/* read lines */
while (length > 0) {
/* read one line */
len = length > 80 ? 80 : length;
if (eeprom_read (CFG_I2C_FACT_ADDR, addr, buf, len))
goto bailout;
/* mark end of buffer */
buf[len] = 0;
/* search end of line */
for (p = buf; *p && *p != 0x0a; p++);
if (!*p)
goto bailout;
*p++ = 0;
/* advance to next line start */
length -= p - buf;
addr += p - buf;
/*printf ("%s\n", buf); */
/* search for our specific entry */
if (!strncmp ((char *) buf, "[RLA/lan/Ethernet] ", 19)) {
setenv ("ethaddr", buf + 19);
} else if (!strncmp ((char *) buf, "[BOARD/SERIAL] ", 15)) {
setenv ("serial#", buf + 15);
} else if (!strncmp ((char *) buf, "[BOARD/TYPE] ", 13)) {
setenv ("board_id", buf + 13);
}
}
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
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