source: SVN/rincon/u-boot/board/esd/cpci405/flash.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: 4.0 KB
Line 
1/*
2 * (C) Copyright 2001-2003
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 calc_size(unsigned long size)
43{
44        switch (size) {
45        case 1 << 20:
46                return 0;
47        case 2 << 20:
48                return 1;
49        case 4 << 20:
50                return 2;
51        case 8 << 20:
52                return 3;
53        case 16 << 20:
54                return 4;
55        default:
56                return 0;
57        }
58}
59
60
61unsigned long flash_init (void)
62{
63        unsigned long size_b0, size_b1;
64        int i;
65        uint pbcr;
66        unsigned long base_b0, base_b1;
67
68        /* Init: no FLASHes known */
69        for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
70                flash_info[i].flash_id = FLASH_UNKNOWN;
71        }
72
73        /* Static FLASH Bank configuration here - FIXME XXX */
74
75        base_b0 = FLASH_BASE0_PRELIM;
76        size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]);
77
78        if (flash_info[0].flash_id == FLASH_UNKNOWN) {
79                printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
80                                size_b0, size_b0 << 20);
81        }
82
83        base_b1 = FLASH_BASE1_PRELIM;
84        size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);
85
86        /* Re-do sizing to get full correct info */
87
88        if (size_b1) {
89                if (size_b1 < (1 << 20)) {
90                        /* minimum CS size on PPC405GP is 1MB !!! */
91                        size_b1 = 1 << 20;
92                }
93                base_b1 = -size_b1;
94                mtdcr (ebccfga, pb0cr);
95                pbcr = mfdcr (ebccfgd);
96                mtdcr (ebccfga, pb0cr);
97                pbcr = (pbcr & 0x0001ffff) | base_b1 | (calc_size(size_b1) << 17);
98                mtdcr (ebccfgd, pbcr);
99#if 0 /* test-only */
100                printf("size_b1=%x base_b1=%x pb1cr = %x\n",
101                       size_b1, base_b1, pbcr); /* test-only */
102#endif
103        }
104
105        if (size_b0) {
106                if (size_b0 < (1 << 20)) {
107                        /* minimum CS size on PPC405GP is 1MB !!! */
108                        size_b0 = 1 << 20;
109                }
110                base_b0 = base_b1 - size_b0;
111                mtdcr (ebccfga, pb1cr);
112                pbcr = mfdcr (ebccfgd);
113                mtdcr (ebccfga, pb1cr);
114                pbcr = (pbcr & 0x0001ffff) | base_b0 | (calc_size(size_b0) << 17);
115                mtdcr (ebccfgd, pbcr);
116#if 0 /* test-only */
117                printf("size_b0=%x base_b0=%x pb0cr = %x\n",
118                       size_b0, base_b0, pbcr); /* test-only */
119#endif
120        }
121
122        size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]);
123
124        flash_get_offsets (base_b0, &flash_info[0]);
125
126        /* monitor protection ON by default */
127        flash_protect (FLAG_PROTECT_SET,
128                        base_b0 + size_b0 - monitor_flash_len,
129                        base_b0 + size_b0 - 1, &flash_info[0]);
130
131        if (size_b1) {
132                /* Re-do sizing to get full correct info */
133                size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);
134
135                flash_get_offsets (base_b1, &flash_info[1]);
136
137                /* monitor protection ON by default */
138                flash_protect (FLAG_PROTECT_SET,
139                                base_b1 + size_b1 - monitor_flash_len,
140                                base_b1 + size_b1 - 1, &flash_info[1]);
141                /* monitor protection OFF by default (one is enough) */
142                flash_protect (FLAG_PROTECT_CLEAR,
143                                base_b0 + size_b0 - monitor_flash_len,
144                                base_b0 + size_b0 - 1, &flash_info[0]);
145        } else {
146                flash_info[1].flash_id = FLASH_UNKNOWN;
147                flash_info[1].sector_count = -1;
148        }
149
150        flash_info[0].size = size_b0;
151        flash_info[1].size = size_b1;
152
153        return (size_b0 + size_b1);
154}
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