1 /* 2 * (C) Copyright 2000-2003 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc. 6 * TsiChung Liew (Tsi-Chung.Liew@freescale.com) 7 * 8 * See file CREDITS for list of people who contributed to this 9 * project. 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License as 13 * published by the Free Software Foundation; either version 2 of 14 * the License, or (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 24 * MA 02111-1307 USA 25 */ 26 27 #include <common.h> 28 #include <asm/immap.h> 29 30 DECLARE_GLOBAL_DATA_PTR; 31 32 int checkboard(void) 33 { 34 puts("Board: "); 35 puts("Freescale M52277 EVB\n"); 36 return 0; 37 }; 38 39 phys_size_t initdram(int board_type) 40 { 41 volatile sdramc_t *sdram = (volatile sdramc_t *)(MMAP_SDRAM); 42 u32 dramsize, i; 43 44 dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000; 45 46 for (i = 0x13; i < 0x20; i++) { 47 if (dramsize == (1 << i)) 48 break; 49 } 50 i--; 51 52 sdram->sdcs0 = (CONFIG_SYS_SDRAM_BASE | i); 53 54 sdram->sdcfg1 = CONFIG_SYS_SDRAM_CFG1; 55 sdram->sdcfg2 = CONFIG_SYS_SDRAM_CFG2; 56 57 /* Issue PALL */ 58 sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 2; 59 60 /* Issue LEMR */ 61 /*sdram->sdmr = CONFIG_SYS_SDRAM_EMOD; */ 62 sdram->sdmr = CONFIG_SYS_SDRAM_MODE; 63 64 udelay(1000); 65 66 /* Issue PALL */ 67 sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 2; 68 69 /* Perform two refresh cycles */ 70 sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 4; 71 sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 4; 72 73 sdram->sdcr = (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000c00; 74 75 udelay(100); 76 77 return (dramsize); 78 }; 79 80 int testdram(void) 81 { 82 /* TODO: XXX XXX XXX */ 83 printf("DRAM test not implemented!\n"); 84 85 return (0); 86 } 87