blob: 355cfedfbedabed854e6fc62306690e63520beaa [file] [log] [blame]
TsiChung Liewbf9a5212009-06-12 11:29:00 +00001/*
2 * (C) Copyright 2000-2003
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
Alison Wang32dbaaf2012-03-26 21:49:04 +00005 * Copyright (C) 2004-2008, 2012 Freescale Semiconductor, Inc.
TsiChung Liewbf9a5212009-06-12 11:29:00 +00006 * 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 <config.h>
28#include <common.h>
29#include <asm/immap.h>
Alison Wang32dbaaf2012-03-26 21:49:04 +000030#include <asm/io.h>
TsiChung Liewbf9a5212009-06-12 11:29:00 +000031
32DECLARE_GLOBAL_DATA_PTR;
33
34int checkboard(void)
35{
36 puts("Board: ");
37 puts("Freescale M5208EVBe\n");
38 return 0;
39};
40
41phys_size_t initdram(int board_type)
42{
Alison Wang32dbaaf2012-03-26 21:49:04 +000043 sdram_t *sdram = (sdram_t *)(MMAP_SDRAM);
TsiChung Liewbf9a5212009-06-12 11:29:00 +000044 u32 dramsize, i;
45
46 dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
47
48 for (i = 0x13; i < 0x20; i++) {
49 if (dramsize == (1 << i))
50 break;
51 }
52 i--;
53
Alison Wang32dbaaf2012-03-26 21:49:04 +000054 out_be32(&sdram->cs0, CONFIG_SYS_SDRAM_BASE | i);
TsiChung Liewbf9a5212009-06-12 11:29:00 +000055#ifdef CONFIG_SYS_SDRAM_BASE1
Alison Wang32dbaaf2012-03-26 21:49:04 +000056 out_be32(&sdram->cs1, CONFIG_SYS_SDRAM_BASE | i);
TsiChung Liewbf9a5212009-06-12 11:29:00 +000057#endif
Alison Wang32dbaaf2012-03-26 21:49:04 +000058 out_be32(&sdram->cfg1, CONFIG_SYS_SDRAM_CFG1);
59 out_be32(&sdram->cfg2, CONFIG_SYS_SDRAM_CFG2);
TsiChung Liewbf9a5212009-06-12 11:29:00 +000060
61 udelay(500);
62
63 /* Issue PALL */
Alison Wang32dbaaf2012-03-26 21:49:04 +000064 out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 2);
TsiChung Liewbf9a5212009-06-12 11:29:00 +000065 asm("nop");
66
67 /* Perform two refresh cycles */
Alison Wang32dbaaf2012-03-26 21:49:04 +000068 out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 4);
69 out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 4);
TsiChung Liewbf9a5212009-06-12 11:29:00 +000070 asm("nop");
71
72 /* Issue LEMR */
Alison Wang32dbaaf2012-03-26 21:49:04 +000073 out_be32(&sdram->mode, CONFIG_SYS_SDRAM_MODE);
TsiChung Liewbf9a5212009-06-12 11:29:00 +000074 asm("nop");
Alison Wang32dbaaf2012-03-26 21:49:04 +000075 out_be32(&sdram->mode, CONFIG_SYS_SDRAM_EMOD);
TsiChung Liewbf9a5212009-06-12 11:29:00 +000076 asm("nop");
77
Alison Wang32dbaaf2012-03-26 21:49:04 +000078 out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 2);
TsiChung Liewbf9a5212009-06-12 11:29:00 +000079 asm("nop");
80
Alison Wang32dbaaf2012-03-26 21:49:04 +000081 out_be32(&sdram->ctrl,
82 (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000F00);
TsiChung Liewbf9a5212009-06-12 11:29:00 +000083 asm("nop");
84
85 udelay(100);
86
87 return dramsize;
88};
89
90int testdram(void)
91{
92 /* TODO: XXX XXX XXX */
93 printf("DRAM test not implemented!\n");
94
95 return (0);
96}