mirror of
https://github.com/AsahiLinux/u-boot
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104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
/*
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* (C) Copyright 2000-2003
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
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* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/immap.h>
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DECLARE_GLOBAL_DATA_PTR;
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int checkboard(void)
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{
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puts("Board: ");
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puts("Freescale M52277 EVB\n");
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return 0;
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};
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phys_size_t initdram(int board_type)
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{
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u32 dramsize;
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#ifdef CONFIG_CF_SBF
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/*
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* Serial Boot: The dram is already initialized in start.S
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* only require to return DRAM size
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*/
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dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
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#else
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volatile sdramc_t *sdram = (volatile sdramc_t *)(MMAP_SDRAM);
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volatile gpio_t *gpio = (volatile gpio_t *)(MMAP_GPIO);
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u32 i;
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dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
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for (i = 0x13; i < 0x20; i++) {
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if (dramsize == (1 << i))
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break;
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}
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i--;
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gpio->mscr_sdram = CONFIG_SYS_SDRAM_DRV_STRENGTH;
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sdram->sdcs0 = (CONFIG_SYS_SDRAM_BASE | i);
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sdram->sdcfg1 = CONFIG_SYS_SDRAM_CFG1;
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sdram->sdcfg2 = CONFIG_SYS_SDRAM_CFG2;
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/* Issue PALL */
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sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 2;
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__asm__("nop");
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/* Issue LEMR */
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sdram->sdmr = CONFIG_SYS_SDRAM_MODE;
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__asm__("nop");
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sdram->sdmr = CONFIG_SYS_SDRAM_EMOD;
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__asm__("nop");
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udelay(1000);
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/* Issue PALL */
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sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 2;
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__asm__("nop");
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/* Perform two refresh cycles */
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sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 4;
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__asm__("nop");
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sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 4;
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__asm__("nop");
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sdram->sdcr = (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000C00;
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udelay(100);
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#endif
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return (dramsize);
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};
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int testdram(void)
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{
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/* TODO: XXX XXX XXX */
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printf("DRAM test not implemented!\n");
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return (0);
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}
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