mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-05 12:45:42 +00:00
108 lines
2.5 KiB
C
108 lines
2.5 KiB
C
/*
|
|
* (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 = CFG_SDRAM_SIZE * 0x100000 >> 1;
|
|
#else
|
|
volatile sdramc_t *sdram = (volatile sdramc_t *)(MMAP_SDRAM);
|
|
volatile gpio_t *gpio = (volatile gpio_t *)(MMAP_GPIO);
|
|
u32 i;
|
|
|
|
dramsize = CFG_SDRAM_SIZE * 0x100000;
|
|
|
|
if ((sdram->sdcfg1 == CFG_SDRAM_CFG1) &&
|
|
(sdram->sdcfg2 == CFG_SDRAM_CFG2))
|
|
return dramsize;
|
|
|
|
for (i = 0x13; i < 0x20; i++) {
|
|
if (dramsize == (1 << i))
|
|
break;
|
|
}
|
|
i--;
|
|
|
|
gpio->mscr_sdram = 0x44;
|
|
|
|
sdram->sdcs0 = (CFG_SDRAM_BASE | i);
|
|
|
|
sdram->sdcfg1 = CFG_SDRAM_CFG1;
|
|
sdram->sdcfg2 = CFG_SDRAM_CFG2;
|
|
|
|
udelay(200);
|
|
|
|
/* Issue PALL */
|
|
sdram->sdcr = CFG_SDRAM_CTRL | 2;
|
|
__asm__("nop");
|
|
|
|
/* Perform two refresh cycles */
|
|
sdram->sdcr = CFG_SDRAM_CTRL | 4;
|
|
__asm__("nop");
|
|
sdram->sdcr = CFG_SDRAM_CTRL | 4;
|
|
__asm__("nop");
|
|
|
|
/* Issue LEMR */
|
|
sdram->sdmr = CFG_SDRAM_MODE;
|
|
__asm__("nop");
|
|
sdram->sdmr = CFG_SDRAM_EMOD;
|
|
__asm__("nop");
|
|
|
|
sdram->sdcr = (CFG_SDRAM_CTRL & ~0x80000000) | 0x10000000;
|
|
|
|
udelay(100);
|
|
#endif
|
|
return (dramsize);
|
|
};
|
|
|
|
int testdram(void)
|
|
{
|
|
/* TODO: XXX XXX XXX */
|
|
printf("DRAM test not implemented!\n");
|
|
|
|
return (0);
|
|
}
|