source: SVN/rincon/u-boot/board/freescale/m52277evb/m52277evb.c @ 55

Last change on this file since 55 was 55, checked in by Tim Harvey, 23 months ago

rincon: added latest u-boot source

restored form server backup

Signed-off-by: Tim Harvey <tharvey@…>

File size: 2.0 KB
Line 
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
30DECLARE_GLOBAL_DATA_PTR;
31
32int checkboard(void)
33{
34        puts("Board: ");
35        puts("Freescale M52277 EVB\n");
36        return 0;
37};
38
39phys_size_t initdram(int board_type)
40{
41        volatile sdramc_t *sdram = (volatile sdramc_t *)(MMAP_SDRAM);
42        u32 dramsize, i;
43
44        dramsize = CFG_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 = (CFG_SDRAM_BASE | i);
53
54        sdram->sdcfg1 = CFG_SDRAM_CFG1;
55        sdram->sdcfg2 = CFG_SDRAM_CFG2;
56
57        /* Issue PALL */
58        sdram->sdcr = CFG_SDRAM_CTRL | 2;
59
60        /* Issue LEMR */
61        /*sdram->sdmr = CFG_SDRAM_EMOD; */
62        sdram->sdmr = CFG_SDRAM_MODE;
63
64        udelay(1000);
65
66        /* Issue PALL */
67        sdram->sdcr = CFG_SDRAM_CTRL | 2;
68
69        /* Perform two refresh cycles */
70        sdram->sdcr = CFG_SDRAM_CTRL | 4;
71        sdram->sdcr = CFG_SDRAM_CTRL | 4;
72
73        sdram->sdcr = (CFG_SDRAM_CTRL & ~0x80000000) | 0x10000c00;
74
75        udelay(100);
76
77        return (dramsize);
78};
79
80int testdram(void)
81{
82        /* TODO: XXX XXX XXX */
83        printf("DRAM test not implemented!\n");
84
85        return (0);
86}
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