source: SVN/rincon/u-boot/board/emk/top860/top860.c @ 55

Last change on this file since 55 was 55, checked in by Tim Harvey, 22 months ago

rincon: added latest u-boot source

restored form server backup

Signed-off-by: Tim Harvey <tharvey@…>

File size: 4.9 KB
Line 
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 *****************************************************************************/
41static 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 *****************************************************************************/
70int checkboard (void)
71{
72        puts ("Board:"CONFIG_IDENT_STRING"\n");
73        return (0);
74}
75
76/*****************************************************************************
77 * Initialize DRAM controller
78 *****************************************************************************/
79phys_size_t initdram (int board_type)
80{
81        volatile immap_t *immap = (immap_t *) CFG_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 = -CFG_DRAM_MAX | OR_CSNT_SAM;
97                memctl->memc_br2 = CFG_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 = -(CFG_DRAM_MAX / 4) | OR_CSNT_SAM;
116                }
117        }
118
119        return -(memctl->memc_or2 & 0xffff0000);
120}
121
122/*****************************************************************************
123 * prepare for FLASH detection
124 *****************************************************************************/
125void flash_preinit(void)
126{
127}
128
129/*****************************************************************************
130 * finalize FLASH setup
131 *****************************************************************************/
132void 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 *****************************************************************************/
140int 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}
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