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/*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.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>
long int initdram (int board_type)
{
#ifndef CFG_RAMBOOT
/* configure SDRAM start/end */
#if defined(CONFIG_MPC5200)
*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x00000018;/* 32M at 0x0 */
*(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x02000000;/* disabled */
/* setup config registers */
*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = 0xc2233a00;
*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = 0x88b70004;
/* unlock mode register */
*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0000;
/* precharge all banks */
*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0002;
/* set mode register */
*(vu_long *)MPC5XXX_SDRAM_MODE = 0x408d0000;
/* precharge all banks */
*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0002;
/* auto refresh */
*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0004;
/* set mode register */
*(vu_long *)MPC5XXX_SDRAM_MODE = 0x008d0000;
/* normal operation */
*(vu_long *)MPC5XXX_SDRAM_CTRL = 0x504f0000;
#elif defined(CONFIG_MGT5100)
*(vu_long *)MPC5XXX_SDRAM_START = 0x00000000;
*(vu_long *)MPC5XXX_SDRAM_STOP = 0x000007ff;/* 64M */
*(vu_long *)MPC5XXX_ADDECR |= (1 << 22); /* Enable SDRAM */
/* setup config registers */
*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = 0xc2222600;
*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = 0x88b70004;
/* address select register */
*(vu_long *)MPC5XXX_SDRAM_XLBSEL = 0x03000000;
/* unlock mode register */
*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd14f0000;
/* precharge all banks */
*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd14f0002;
/* set mode register */
*(vu_long *)MPC5XXX_SDRAM_MODE = 0x008d0000;
/* precharge all banks */
*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd14f0002;
/* auto refresh */
*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd14f0004;
/* set mode register */
*(vu_long *)MPC5XXX_SDRAM_MODE = 0x008d0000;
/* normal operation */
*(vu_long *)MPC5XXX_SDRAM_CTRL = 0x514f0000;
#endif
#else
#ifdef CONFIG_MGT5100
*(vu_long *)MPC5XXX_ADDECR |= (1 << 22); /* Enable SDRAM */
#endif
#endif
/* return total ram size */
#if defined(CONFIG_MGT5100)
return (64 * 1024 * 1024);
#elif defined(CONFIG_MPC5200)
return (32 * 1024 * 1024);
#endif
}
int checkboard (void)
{
#if defined(CONFIG_MPC5200)
puts ("Board: Motorola MPC5200 (IceCube)\n");
#elif defined(CONFIG_MGT5100)
puts ("Board: Motorola MGT5100 (IceCube)\n");
#endif
return 0;
}
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.
*/
#if defined(CONFIG_MGT5100)
*(vu_long *)MPC5XXX_ADDECR &= ~(1 << 25); /* disable CS_BOOT */
*(vu_long *)MPC5XXX_ADDECR |= (1 << 16); /* enable CS0 */
#endif
*(vu_long *)MPC5XXX_BOOTCS_CFG &= ~0x1; /* clear RO */
}
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