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/*
* (C) Copyright 2003
* EMK Elektronik GmbH <www.emk-elektronik.de>
* Reinhard Meyer <r.meyer@emk-elektronik.de>
*
* Board specific routines for the TOP860
*
* - initialisation
* - interface to VPD data (mac address, clock speeds)
* - memory controller
* - serial io initialisation
* - ethernet io initialisation
*
* -----------------------------------------------------------------
* 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 <commproc.h>
#include <mpc8xx.h>
#include <asm/io.h>
/*****************************************************************************
* UPM table for 60ns EDO RAM at 25 MHz bus/external clock
*****************************************************************************/
static const uint edo_60ns_25MHz_tbl[] = {
/* single read (offset 0x00 in upm ram) */
0x0ff3fc04,0x08f3fc04,0x00f3fc04,0x00f3fc00,
0x33f7fc07,0xfffffc05,0xfffffc05,0xfffffc05,
/* burst read (offset 0x08 in upm ram) */
0x0ff3fc04,0x08f3fc04,0x00f3fc0c,0x0ff3fc40,
0x0cf3fc04,0x03f3fc48,0x0cf3fc04,0x03f3fc48,
0x0cf3fc04,0x03f3fc00,0x3ff7fc07,0xfffffc05,
0xfffffc05,0xfffffc05,0xfffffc05,0xfffffc05,
/* single write (offset 0x18 in upm ram) */
0x0ffffc04,0x08fffc04,0x30fffc00,0xf1fffc07,
0xfffffc05,0xfffffc05,0xfffffc05,0xfffffc05,
/* burst write (offset 0x20 in upm ram) */
0x0ffffc04,0x08fffc00,0x00fffc04,0x03fffc4c,
0x00fffc00,0x07fffc4c,0x00fffc00,0x0ffffc4c,
0x00fffc00,0x3ffffc07,0xfffffc05,0xfffffc05,
0xfffffc05,0xfffffc05,0xfffffc05,0xfffffc05,
/* refresh (offset 0x30 in upm ram) */
0xc0fffc04,0x07fffc04,0x0ffffc04,0x0ffffc04,
0xfffffc05,0xfffffc05,0xfffffc05,0xfffffc05,
0xfffffc05,0xfffffc05,0xfffffc05,0xfffffc05,
/* exception (offset 0x3C in upm ram) */
0xfffffc07,0xfffffc03,0xfffffc05,0xfffffc05,
};
/*****************************************************************************
* Print Board Identity
*****************************************************************************/
int checkboard (void)
{
puts ("Board:"CONFIG_IDENT_STRING"\n");
return (0);
}
/*****************************************************************************
* Initialize DRAM controller
*****************************************************************************/
phys_size_t initdram (int board_type)
{
volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
/*
* Only initialize memory controller when running from FLASH.
* When running from RAM, don't touch it.
*/
if ((ulong) initdram & 0xff000000) {
volatile uint *addr1, *addr2;
uint i;
upmconfig (UPMA, (uint *) edo_60ns_25MHz_tbl,
sizeof (edo_60ns_25MHz_tbl) / sizeof (uint));
memctl->memc_mptpr = 0x0200;
memctl->memc_mamr = 0x0ca20330;
memctl->memc_or2 = -CONFIG_SYS_DRAM_MAX | OR_CSNT_SAM;
memctl->memc_br2 = CONFIG_SYS_DRAM_BASE | BR_MS_UPMA | BR_V;
/*
* Do 8 read accesses to DRAM
*/
addr1 = (volatile uint *) 0;
addr2 = (volatile uint *) 0x00400000;
for (i = 0; i < 8; i++)
in_be32(addr1);
/*
* Now check whether we got 4MB or 16MB populated
*/
addr1[0] = 0x12345678;
addr1[1] = 0x9abcdef0;
addr2[0] = 0xfeedc0de;
addr2[1] = 0x47110815;
if (addr1[0] == 0xfeedc0de && addr1[1] == 0x47110815) {
/* only 4MB populated */
memctl->memc_or2 = -(CONFIG_SYS_DRAM_MAX / 4) | OR_CSNT_SAM;
}
}
return -(memctl->memc_or2 & 0xffff0000);
}
/*****************************************************************************
* prepare for FLASH detection
*****************************************************************************/
void flash_preinit(void)
{
}
/*****************************************************************************
* finalize FLASH setup
*****************************************************************************/
void flash_afterinit(uint bank, ulong start, ulong 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 */
extern void read_factory_r (void);
read_factory_r ();
return (0);
}
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