2 * (C) Copyright 2000-2003
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * Copyright (C) 2004-2008, 2012 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>
32 DECLARE_GLOBAL_DATA_PTR;
38 * Check serial flash size. if 2mb evb, else 8mb demo
41 puts("Freescale M54451 EVB\n");
45 phys_size_t initdram(int board_type)
50 * Serial Boot: The dram is already initialized in start.S
51 * only require to return DRAM size
53 dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
55 sdramc_t *sdram = (sdramc_t *)(MMAP_SDRAM);
56 gpio_t *gpio = (gpio_t *)(MMAP_GPIO);
59 dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
61 if ((in_be32(&sdram->sdcfg1) == CONFIG_SYS_SDRAM_CFG1) &&
62 (in_be32(&sdram->sdcfg2) == CONFIG_SYS_SDRAM_CFG2))
65 for (i = 0x13; i < 0x20; i++) {
66 if (dramsize == (1 << i))
71 out_8(&gpio->mscr_sdram, CONFIG_SYS_SDRAM_DRV_STRENGTH);
73 out_be32(&sdram->sdcs0, CONFIG_SYS_SDRAM_BASE | i);
75 out_be32(&sdram->sdcfg1, CONFIG_SYS_SDRAM_CFG1);
76 out_be32(&sdram->sdcfg2, CONFIG_SYS_SDRAM_CFG2);
81 out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 2);
84 /* Perform two refresh cycles */
85 out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4);
87 out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4);
91 out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_MODE);
93 out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_MODE);
96 out_be32(&sdram->sdcr,
97 (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000000);
106 /* TODO: XXX XXX XXX */
107 printf("DRAM test not implemented!\n");