1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/*
* (C) Copyright 2000-2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#if defined(CONFIG_NIOS)
#include <nios.h>
#else
#include <asm/io.h>
#endif
#define SECTSZ (64 * 1024)
flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
/*----------------------------------------------------------------------*/
unsigned long flash_init (void)
{
int i;
unsigned long addr;
flash_info_t *fli = &flash_info[0];
fli->size = CONFIG_SYS_FLASH_SIZE;
fli->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
fli->flash_id = FLASH_MAN_AMD + FLASH_AMDLV065D;
addr = CONFIG_SYS_FLASH_BASE;
for (i = 0; i < fli->sector_count; ++i) {
fli->start[i] = addr;
addr += SECTSZ;
fli->protect[i] = 1;
}
return (CONFIG_SYS_FLASH_SIZE);
}
/*--------------------------------------------------------------------*/
void flash_print_info (flash_info_t * info)
{
int i, k;
int erased;
unsigned long *addr;
printf (" Size: %ld KB in %d Sectors\n",
info->size >> 10, info->sector_count);
printf (" Sector Start Addresses:");
for (i = 0; i < info->sector_count; ++i) {
/* Check if whole sector is erased */
erased = 1;
addr = (unsigned long *) info->start[i];
for (k = 0; k < SECTSZ/sizeof(unsigned long); k++) {
if ( readl(addr++) != (unsigned long)-1) {
erased = 0;
break;
}
}
/* Print the info */
if ((i % 5) == 0)
printf ("\n ");
printf (" %08lX%s%s",
info->start[i],
erased ? " E" : " ",
info->protect[i] ? "RO " : " ");
}
printf ("\n");
}
/*-------------------------------------------------------------------*/
int flash_erase (flash_info_t * info, int s_first, int s_last)
{
unsigned char *addr = (unsigned char *) info->start[0];
unsigned char *addr2;
int prot, sect;
ulong start;
/* Some sanity checking */
if ((s_first < 0) || (s_first > s_last)) {
printf ("- no sectors to erase\n");
return 1;
}
prot = 0;
for (sect = s_first; sect <= s_last; ++sect) {
if (info->protect[sect]) {
prot++;
}
}
if (prot) {
printf ("- Warning: %d protected sectors will not be erased!\n",
prot);
} else {
printf ("\n");
}
/* It's ok to erase multiple sectors provided we don't delay more
* than 50 usec between cmds ... at which point the erase time-out
* occurs. So don't go and put printf() calls in the loop ... it
* won't be very helpful ;-)
*/
for (sect = s_first; sect <= s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
addr2 = (unsigned char *) info->start[sect];
writeb (0xaa, addr);
writeb (0x55, addr);
writeb (0x80, addr);
writeb (0xaa, addr);
writeb (0x55, addr);
writeb (0x30, addr2);
/* Now just wait for 0xff & provide some user
* feedback while we wait.
*/
start = get_timer (0);
while ( readb (addr2) != 0xff) {
udelay (1000 * 1000);
putc ('.');
if (get_timer (start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
printf ("timeout\n");
return 1;
}
}
}
}
printf ("\n");
return 0;
}
/*-----------------------------------------------------------------------
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
{
vu_char *cmd = (vu_char *) info->start[0];
vu_char *dst = (vu_char *) addr;
unsigned char b;
ulong start;
while (cnt) {
/* Check for sufficient erase */
b = *src;
if ((readb (dst) & b) != b) {
printf ("%02x : %02x\n", readb (dst), b);
return (2);
}
writeb (0xaa, cmd);
writeb (0x55, cmd);
writeb (0xa0, cmd);
writeb (dst, b);
/* Verify write */
start = get_timer (0);
while (readb (dst) != b) {
if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
return 1;
}
}
dst++;
src++;
cnt--;
}
return (0);
}
|
