source: SVN/rincon/u-boot/board/dave/PPChameleonEVB/flash.c @ 55

Last change on this file since 55 was 55, checked in by Tim Harvey, 2 years ago

rincon: added latest u-boot source

restored form server backup

Signed-off-by: Tim Harvey <tharvey@…>

File size: 3.0 KB
Line 
1/*
2 * (C) Copyright 2001
3 * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
25#include <ppc4xx.h>
26#include <asm/processor.h>
27
28/*
29 * include common flash code (for esd boards)
30 */
31#include "../common/flash.c"
32
33/*-----------------------------------------------------------------------
34 * Functions
35 */
36static ulong flash_get_size (vu_long * addr, flash_info_t * info);
37static void flash_get_offsets (ulong base, flash_info_t * info);
38
39/*-----------------------------------------------------------------------
40 */
41
42unsigned long flash_init (void)
43{
44#ifdef __DEBUG_START_FROM_SRAM__
45        return CFG_DUMMY_FLASH_SIZE;
46#else
47        unsigned long size;
48        int i;
49        uint pbcr;
50        unsigned long base;
51        int size_val = 0;
52
53        debug("[%s, %d] Entering ...\n", __FUNCTION__, __LINE__);
54        debug("[%s, %d] flash_info = 0x%08X ...\n", __FUNCTION__, __LINE__, flash_info);
55
56        /* Init: no FLASHes known */
57        for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
58                flash_info[i].flash_id = FLASH_UNKNOWN;
59        }
60
61        /* Static FLASH Bank configuration here - FIXME XXX */
62
63        debug("[%s, %d] Calling flash_get_size ...\n", __FUNCTION__, __LINE__);
64        size = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
65
66        if (flash_info[0].flash_id == FLASH_UNKNOWN) {
67                printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
68                        size, size<<20);
69        }
70
71        debug("[%s, %d] Test point ...\n", __FUNCTION__, __LINE__);
72
73        /* Setup offsets */
74        flash_get_offsets (-size, &flash_info[0]);
75        debug("[%s, %d] Test point ...\n", __FUNCTION__, __LINE__);
76
77        /* Re-do sizing to get full correct info */
78        mtdcr(ebccfga, pb0cr);
79        pbcr = mfdcr(ebccfgd);
80        mtdcr(ebccfga, pb0cr);
81        base = -size;
82        switch (size) {
83        case 1 << 20:
84                size_val = 0;
85                break;
86        case 2 << 20:
87                size_val = 1;
88                break;
89        case 4 << 20:
90                size_val = 2;
91                break;
92        case 8 << 20:
93                size_val = 3;
94                break;
95        case 16 << 20:
96                size_val = 4;
97                break;
98        }
99        pbcr = (pbcr & 0x0001ffff) | base | (size_val << 17);
100        mtdcr(ebccfgd, pbcr);
101        debug("[%s, %d] Test point ...\n", __FUNCTION__, __LINE__);
102
103        /* Monitor protection ON by default */
104        (void)flash_protect(FLAG_PROTECT_SET,
105                            -CFG_MONITOR_LEN,
106                            0xffffffff,
107                            &flash_info[0]);
108
109        debug("[%s, %d] Test point ...\n", __FUNCTION__, __LINE__);
110        flash_info[0].size  = size;
111
112        return (size);
113#endif
114}
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