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/*
* (C) Copyright 2003-2007
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* modified for Promess PRO - by Andy Joseph, andy@promessdev.com
* modified for Promess PRO-Motion - by Robert McCullough, rob@promessdev.com
* modified by Chris M. Tumas 6/20/06 Change CAS latency to 2 from 3
* Also changed the refresh for 100Mhz operation
*
* 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>
#if defined(CONFIG_OF_FLAT_TREE)
#include <ft_build.h>
#endif
/* Kollmorgen DPR initialization data */
struct init_elem {
unsigned long addr;
unsigned len;
char *data;
} init_seq[] = {
{0x500003F2, 2, "\x86\x00"}, /* HW parameter */
{0x500003F0, 2, "\x00\x00"},
{0x500003EC, 4, "\x00\x80\xc1\x52"}, /* Magic word */
};
/*
* Initialize Kollmorgen DPR
*/
static void kollmorgen_init(void)
{
unsigned i, j;
vu_char *p;
for (i = 0; i < sizeof(init_seq) / sizeof(struct init_elem); ++i) {
p = (vu_char *)init_seq[i].addr;
for (j = 0; j < init_seq[i].len; ++j)
*(p + j) = *(init_seq[i].data + j);
}
printf("DPR: Kollmorgen DPR initialized\n");
}
/*
* Early board initalization.
*/
int board_early_init_r(void)
{
/* Now, when we are in RAM, disable Boot Chipselect and enable CS0 */
*(vu_long *)MPC5XXX_ADDECR &= ~(1 << 25);
*(vu_long *)MPC5XXX_ADDECR |= (1 << 16);
/* Initialize Kollmorgen DPR */
kollmorgen_init();
return 0;
}
#ifndef CFG_RAMBOOT
/*
* Helper function to initialize SDRAM controller.
*/
static void sdram_start (int hi_addr)
{
long hi_addr_bit = hi_addr ? 0x01000000 : 0;
/* unlock mode register */
*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000000 |
hi_addr_bit;
/* precharge all banks */
*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 |
hi_addr_bit;
/* auto refresh */
*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000004 |
hi_addr_bit;
/* auto refresh, second time */
*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000004 |
hi_addr_bit;
/* set mode register */
*(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_MODE;
/* normal operation */
*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | hi_addr_bit;
}
#endif /* !CFG_RAMBOOT */
/*
* Initalize SDRAM - configure SDRAM controller, detect memory size.
*/
long int initdram (int board_type)
{
ulong dramsize = 0;
#ifndef CFG_RAMBOOT
ulong test1, test2;
/* configure SDRAM start/end for detection */
*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x0000001e; /* 2G at 0x0 */
*(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x80000000; /* disabled */
/* setup config registers */
*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = SDRAM_CONFIG1;
*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = SDRAM_CONFIG2;
sdram_start(0);
test1 = get_ram_size((long *)CFG_SDRAM_BASE, 0x80000000);
sdram_start(1);
test2 = get_ram_size((long *)CFG_SDRAM_BASE, 0x80000000);
if (test1 > test2) {
sdram_start(0);
dramsize = test1;
} else {
dramsize = test2;
}
/* memory smaller than 1MB is impossible */
if (dramsize < (1 << 20))
dramsize = 0;
/* set SDRAM CS0 size according to the amount of RAM found */
if (dramsize > 0)
*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x13 +
__builtin_ffs(dramsize >> 20) - 1;
else
*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0; /* disabled */
/* let SDRAM CS1 start right after CS0 and disable it */
*(vu_long *) MPC5XXX_SDRAM_CS1CFG = dramsize;
#else /* !CFG_RAMBOOT */
/* retrieve size of memory connected to SDRAM CS0 */
dramsize = *(vu_long *)MPC5XXX_SDRAM_CS0CFG & 0xFF;
if (dramsize >= 0x13)
dramsize = (1 << (dramsize - 0x13)) << 20;
else
dramsize = 0;
#endif /* CFG_RAMBOOT */
/* return total ram size */
return dramsize;
}
int checkboard (void)
{
puts("Board: Promess Motion-PRO board\n");
return 0;
}
#if defined(CONFIG_OF_FLAT_TREE) && defined(CONFIG_OF_BOARD_SETUP)
void ft_board_setup(void *blob, bd_t *bd)
{
ft_cpu_setup(blob, bd);
}
#endif /* defined(CONFIG_OF_FLAT_TREE) && defined(CONFIG_OF_BOARD_SETUP) */
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