← Back to branch summary

~ubuntu-branches/ubuntu/maverick/u-boot-omap3/maverick

« back to all changes in this revision

Viewing changes to board/emk/top860/top860.c

  • Committer: Bazaar Package Importer
  • Author(s): Oliver Grawert
  • Date: 2010-03-22 15:06:23 UTC
  • Revision ID: james.westby@ubuntu.com-20100322150623-i21g8rgiyl5dohag
Tags: upstream-2010.3git20100315
Import upstream version 2010.3git20100315

Show diffs side-by-side

added added

removed removed

Lines of Context:
board/emk/top860/top860.c
 
1
/*
 
2
 * (C) Copyright 2003
 
3
 * EMK Elektronik GmbH <www.emk-elektronik.de>
 
4
 * Reinhard Meyer <r.meyer@emk-elektronik.de>
 
5
 *
 
6
 * Board specific routines for the TOP860
 
7
 *
 
8
 * - initialisation
 
9
 * - interface to VPD data (mac address, clock speeds)
 
10
 * - memory controller
 
11
 * - serial io initialisation
 
12
 * - ethernet io initialisation
 
13
 *
 
14
 * -----------------------------------------------------------------
 
15
 * See file CREDITS for list of people who contributed to this
 
16
 * project.
 
17
 *
 
18
 * This program is free software; you can redistribute it and/or
 
19
 * modify it under the terms of the GNU General Public License as
 
20
 * published by the Free Software Foundation; either version 2 of
 
21
 * the License, or (at your option) any later version.
 
22
 *
 
23
 * This program is distributed in the hope that it will be useful,
 
24
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
25
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
26
 * GNU General Public License for more details.
 
27
 *
 
28
 * You should have received a copy of the GNU General Public License
 
29
 * along with this program; if not, write to the Free Software
 
30
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 
31
 * MA 02111-1307 USA
 
32
 */
 
33
 
 
34
#include <common.h>
 
35
#include <commproc.h>
 
36
#include <mpc8xx.h>
 
37
 
 
38
/*****************************************************************************
 
39
 * UPM table for 60ns EDO RAM at 25 MHz bus/external clock
 
40
 *****************************************************************************/
 
41
static const uint edo_60ns_25MHz_tbl[] = {
 
42
 
 
43
/* single read   (offset 0x00 in upm ram) */
 
44
    0x0ff3fc04,0x08f3fc04,0x00f3fc04,0x00f3fc00,
 
45
    0x33f7fc07,0xfffffc05,0xfffffc05,0xfffffc05,
 
46
/* burst read    (offset 0x08 in upm ram) */
 
47
    0x0ff3fc04,0x08f3fc04,0x00f3fc0c,0x0ff3fc40,
 
48
    0x0cf3fc04,0x03f3fc48,0x0cf3fc04,0x03f3fc48,
 
49
    0x0cf3fc04,0x03f3fc00,0x3ff7fc07,0xfffffc05,
 
50
    0xfffffc05,0xfffffc05,0xfffffc05,0xfffffc05,
 
51
/* single write  (offset 0x18 in upm ram) */
 
52
    0x0ffffc04,0x08fffc04,0x30fffc00,0xf1fffc07,
 
53
    0xfffffc05,0xfffffc05,0xfffffc05,0xfffffc05,
 
54
/* burst write   (offset 0x20 in upm ram) */
 
55
    0x0ffffc04,0x08fffc00,0x00fffc04,0x03fffc4c,
 
56
    0x00fffc00,0x07fffc4c,0x00fffc00,0x0ffffc4c,
 
57
    0x00fffc00,0x3ffffc07,0xfffffc05,0xfffffc05,
 
58
    0xfffffc05,0xfffffc05,0xfffffc05,0xfffffc05,
 
59
/* refresh       (offset 0x30 in upm ram) */
 
60
    0xc0fffc04,0x07fffc04,0x0ffffc04,0x0ffffc04,
 
61
    0xfffffc05,0xfffffc05,0xfffffc05,0xfffffc05,
 
62
    0xfffffc05,0xfffffc05,0xfffffc05,0xfffffc05,
 
63
/* exception     (offset 0x3C in upm ram) */
 
64
    0xfffffc07,0xfffffc03,0xfffffc05,0xfffffc05,
 
65
};
 
66
 
 
67
/*****************************************************************************
 
68
 * Print Board Identity
 
69
 *****************************************************************************/
 
70
int checkboard (void)
 
71
{
 
72
        puts ("Board:"CONFIG_IDENT_STRING"\n");
 
73
        return (0);
 
74
}
 
75
 
 
76
/*****************************************************************************
 
77
 * Initialize DRAM controller
 
78
 *****************************************************************************/
 
79
phys_size_t initdram (int board_type)
 
80
{
 
81
        volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
 
82
        volatile memctl8xx_t *memctl = &immap->im_memctl;
 
83
 
 
84
        /*
 
85
         * Only initialize memory controller when running from FLASH.
 
86
         * When running from RAM, don't touch it.
 
87
         */
 
88
        if ((ulong) initdram & 0xff000000) {
 
89
                volatile uint *addr1, *addr2;
 
90
                uint i, j;
 
91
 
 
92
                upmconfig (UPMA, (uint *) edo_60ns_25MHz_tbl,
 
93
                           sizeof (edo_60ns_25MHz_tbl) / sizeof (uint));
 
94
                memctl->memc_mptpr = 0x0200;
 
95
                memctl->memc_mamr = 0x0ca20330;
 
96
                memctl->memc_or2 = -CONFIG_SYS_DRAM_MAX | OR_CSNT_SAM;
 
97
                memctl->memc_br2 = CONFIG_SYS_DRAM_BASE | BR_MS_UPMA | BR_V;
 
98
                /*
 
99
                 * Do 8 read accesses to DRAM
 
100
                 */
 
101
                addr1 = (volatile uint *) 0;
 
102
                addr2 = (volatile uint *) 0x00400000;
 
103
                for (i = 0, j = 0; i < 8; i++)
 
104
                        j = addr1[0];
 
105
 
 
106
                /*
 
107
                 * Now check whether we got 4MB or 16MB populated
 
108
                 */
 
109
                addr1[0] = 0x12345678;
 
110
                addr1[1] = 0x9abcdef0;
 
111
                addr2[0] = 0xfeedc0de;
 
112
                addr2[1] = 0x47110815;
 
113
                if (addr1[0] == 0xfeedc0de && addr1[1] == 0x47110815) {
 
114
                        /* only 4MB populated */
 
115
                        memctl->memc_or2 = -(CONFIG_SYS_DRAM_MAX / 4) | OR_CSNT_SAM;
 
116
                }
 
117
        }
 
118
 
 
119
        return -(memctl->memc_or2 & 0xffff0000);
 
120
}
 
121
 
 
122
/*****************************************************************************
 
123
 * prepare for FLASH detection
 
124
 *****************************************************************************/
 
125
void flash_preinit(void)
 
126
{
 
127
}
 
128
 
 
129
/*****************************************************************************
 
130
 * finalize FLASH setup
 
131
 *****************************************************************************/
 
132
void flash_afterinit(uint bank, ulong start, ulong size)
 
133
{
 
134
}
 
135
 
 
136
/*****************************************************************************
 
137
 * otherinits after RAM is there and we are relocated to RAM
 
138
 * note: though this is an int function, nobody cares for the result!
 
139
 *****************************************************************************/
 
140
int misc_init_r (void)
 
141
{
 
142
        /* read 'factory' part of EEPROM */
 
143
        extern void read_factory_r (void);
 
144
        read_factory_r ();
 
145
 
 
146
        return (0);
 
147
}