/* * (C) Copyright 2000-2003 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * Copyright (C) 2004-2007 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 <asm/immap.h> DECLARE_GLOBAL_DATA_PTR; int checkboard(void) { puts("Board: "); puts("Freescale M52277 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; 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; /* Issue PALL */ sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 2; __asm__("nop"); /* Issue LEMR */ sdram->sdmr = CONFIG_SYS_SDRAM_MODE; __asm__("nop"); sdram->sdmr = CONFIG_SYS_SDRAM_EMOD; __asm__("nop"); udelay(1000); /* 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"); sdram->sdcr = (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000C00; udelay(100); #endif return (dramsize); }; int testdram(void) { /* TODO: XXX XXX XXX */ printf("DRAM test not implemented!\n"); return (0); }