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/*
* (C) Copyright 2000-2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Copyright (C) 2004-2008 Freescale Semiconductor, Inc.
* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
*
* 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 <spi.h>
#include <asm/immap.h>
DECLARE_GLOBAL_DATA_PTR;
int checkboard(void)
{
/*
* need to to:
* Check serial flash size. if 2mb evb, else 8mb demo
*/
puts("Board: ");
puts("Freescale M54451 EVB\n");
return 0;
};
phys_size_t initdram(int board_type)
{
u32 dramsize;
#ifdef CONFIG_CF_SBF
/*
* Serial Boot: The dram is already initialized in start.S
* only require to return DRAM size
*/
dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
#else
volatile sdramc_t *sdram = (volatile sdramc_t *)(MMAP_SDRAM);
volatile gpio_t *gpio = (volatile gpio_t *)(MMAP_GPIO);
u32 i;
dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
if ((sdram->sdcfg1 == CONFIG_SYS_SDRAM_CFG1) &&
(sdram->sdcfg2 == CONFIG_SYS_SDRAM_CFG2))
return dramsize;
for (i = 0x13; i < 0x20; i++) {
if (dramsize == (1 << i))
break;
}
i--;
gpio->mscr_sdram = CONFIG_SYS_SDRAM_DRV_STRENGTH;
sdram->sdcs0 = (CONFIG_SYS_SDRAM_BASE | i);
sdram->sdcfg1 = CONFIG_SYS_SDRAM_CFG1;
sdram->sdcfg2 = CONFIG_SYS_SDRAM_CFG2;
udelay(200);
/* Issue PALL */
sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 2;
__asm__("nop");
/* Perform two refresh cycles */
sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 4;
__asm__("nop");
sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 4;
__asm__("nop");
/* Issue LEMR */
sdram->sdmr = CONFIG_SYS_SDRAM_MODE;
__asm__("nop");
sdram->sdmr = CONFIG_SYS_SDRAM_EMOD;
__asm__("nop");
sdram->sdcr = (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000000;
udelay(100);
#endif
return (dramsize);
};
int testdram(void)
{
/* TODO: XXX XXX XXX */
printf("DRAM test not implemented!\n");
return (0);
}
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