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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>
#include <pci.h>
#ifndef CFG_RAMBOOT
static long int dram_size(long int *base, long int maxsize)
{
volatile long int *addr;
ulong cnt, val;
ulong save[32]; /* to make test non-destructive */
unsigned char i = 0;
for (cnt = (maxsize / sizeof (long)) >> 1; cnt > 0; cnt >>= 1) {
addr = base + cnt; /* pointer arith! */
save[i++] = *addr;
*addr = ~cnt;
}
/* write 0 to base address */
addr = base;
save[i] = *addr;
*addr = 0;
/* check at base address */
if ((val = *addr) != 0) {
*addr = save[i];
return (0);
}
for (cnt = 1; cnt < maxsize / sizeof (long); cnt <<= 1) {
addr = base + cnt; /* pointer arith! */
val = *addr;
*addr = save[--i];
if (val != (~cnt)) {
return (cnt * sizeof (long));
}
}
return (maxsize);
}
static void sdram_start (int hi_addr)
{
long hi_addr_bit = hi_addr ? 0x01000000 : 0;
/* unlock mode register */
*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0000 | hi_addr_bit;
/* precharge all banks */
*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0002 | hi_addr_bit;
/* set mode register */
#if defined(CONFIG_MPC5200)
*(vu_long *)MPC5XXX_SDRAM_MODE = 0x408d0000;
#elif defined(CONFIG_MGT5100)
*(vu_long *)MPC5XXX_SDRAM_MODE = 0x008d0000;
#endif
/* precharge all banks */
*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0002 | hi_addr_bit;
/* auto refresh */
*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0004 | hi_addr_bit;
/* set mode register */
*(vu_long *)MPC5XXX_SDRAM_MODE = 0x008d0000;
/* normal operation */
*(vu_long *)MPC5XXX_SDRAM_CTRL = 0x504f0000 | hi_addr_bit;
}
#endif
long int initdram (int board_type)
{
ulong dramsize = 0;
#ifndef CFG_RAMBOOT
ulong test1, test2;
/* configure SDRAM start/end */
#if defined(CONFIG_MPC5200)
*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x0000001e;/* 2G at 0x0 */
*(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x80000000;/* disabled */
/* setup config registers */
*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = 0xc2233a00;
*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = 0x88b70004;
#elif defined(CONFIG_MGT5100)
*(vu_long *)MPC5XXX_SDRAM_START = 0x00000000;
*(vu_long *)MPC5XXX_SDRAM_STOP = 0x0000ffff;/* 2G */
*(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;
#endif
sdram_start(0);
test1 = dram_size((ulong *)CFG_SDRAM_BASE, 0x80000000);
sdram_start(1);
test2 = dram_size((ulong *)CFG_SDRAM_BASE, 0x80000000);
if (test1 > test2) {
sdram_start(0);
dramsize = test1;
} else {
dramsize = test2;
}
#if defined(CONFIG_MPC5200)
*(vu_long *)MPC5XXX_SDRAM_CS0CFG =
(0x13 + __builtin_ffs(dramsize >> 20) - 1);
*(vu_long *)MPC5XXX_SDRAM_CS1CFG = dramsize; /* disabled */
#elif defined(CONFIG_MGT5100)
*(vu_long *)MPC5XXX_SDRAM_STOP = ((dramsize - 1) >> 15);
#endif
#else
#ifdef CONFIG_MGT5100
*(vu_long *)MPC5XXX_ADDECR |= (1 << 22); /* Enable SDRAM */
dramsize = ((*(vu_long *)MPC5XXX_SDRAM_STOP + 1) << 15);
#else
dramsize = ((1 << (*(vu_long *)MPC5XXX_SDRAM_CS0CFG - 0x13)) << 20);
#endif
#endif /* CFG_RAMBOOT */
/* return total ram size */
return dramsize;
}
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 */
}
#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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