2 * (C) Copyright 2000-2003
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * Copyright (C) 2004-2008 Freescale Semiconductor, Inc.
6 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
8 * See file CREDITS for list of people who contributed to this
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.
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.
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,
29 #include <asm/immap.h>
31 DECLARE_GLOBAL_DATA_PTR;
37 * Check serial flash size. if 2mb evb, else 8mb demo
40 puts("Freescale M54451 EVB\n");
44 phys_size_t initdram(int board_type)
49 * Serial Boot: The dram is already initialized in start.S
50 * only require to return DRAM size
52 dramsize = CFG_SDRAM_SIZE * 0x100000;
54 volatile sdramc_t *sdram = (volatile sdramc_t *)(MMAP_SDRAM);
55 volatile gpio_t *gpio = (volatile gpio_t *)(MMAP_GPIO);
58 dramsize = CFG_SDRAM_SIZE * 0x100000;
60 if ((sdram->sdcfg1 == CFG_SDRAM_CFG1) &&
61 (sdram->sdcfg2 == CFG_SDRAM_CFG2))
64 for (i = 0x13; i < 0x20; i++) {
65 if (dramsize == (1 << i))
70 gpio->mscr_sdram = CFG_SDRAM_DRV_STRENGTH;
72 sdram->sdcs0 = (CFG_SDRAM_BASE | i);
74 sdram->sdcfg1 = CFG_SDRAM_CFG1;
75 sdram->sdcfg2 = CFG_SDRAM_CFG2;
80 sdram->sdcr = CFG_SDRAM_CTRL | 2;
83 /* Perform two refresh cycles */
84 sdram->sdcr = CFG_SDRAM_CTRL | 4;
86 sdram->sdcr = CFG_SDRAM_CTRL | 4;
90 sdram->sdmr = CFG_SDRAM_MODE;
92 sdram->sdmr = CFG_SDRAM_EMOD;
95 sdram->sdcr = (CFG_SDRAM_CTRL & ~0x80000000) | 0x10000000;
104 /* TODO: XXX XXX XXX */
105 printf("DRAM test not implemented!\n");