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
|
/*
* This file is part of the flashrom project.
*
* Copyright (C) 2000 Silicon Integrated System Corporation
* Copyright (C) 2005 coresystems GmbH <stepan@openbios.org>
* Copyright (C) 2009 Sean Nelson <audiohacked@gmail.com>
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "flash.h"
#include "chipdrivers.h"
#define AUTO_PG_ERASE1 0x20
#define AUTO_PG_ERASE2 0xD0
#define AUTO_PGRM 0x10
#define CHIP_ERASE 0x30
#define RESET 0xFF
#define READ_ID 0x90
int protect_28sf040(struct flashchip *flash)
{
chipaddr bios = flash->virtual_memory;
chip_readb(bios + 0x1823);
chip_readb(bios + 0x1820);
chip_readb(bios + 0x1822);
chip_readb(bios + 0x0418);
chip_readb(bios + 0x041B);
chip_readb(bios + 0x0419);
chip_readb(bios + 0x040A);
return 0;
}
int unprotect_28sf040(struct flashchip *flash)
{
chipaddr bios = flash->virtual_memory;
chip_readb(bios + 0x1823);
chip_readb(bios + 0x1820);
chip_readb(bios + 0x1822);
chip_readb(bios + 0x0418);
chip_readb(bios + 0x041B);
chip_readb(bios + 0x0419);
chip_readb(bios + 0x041A);
return 0;
}
int erase_sector_28sf040(struct flashchip *flash, unsigned int address, unsigned int sector_size)
{
chipaddr bios = flash->virtual_memory;
/* This command sequence is very similar to erase_block_82802ab. */
chip_writeb(AUTO_PG_ERASE1, bios);
chip_writeb(AUTO_PG_ERASE2, bios + address);
/* wait for Toggle bit ready */
toggle_ready_jedec(bios);
if (check_erased_range(flash, address, sector_size)) {
msg_cerr("ERASE FAILED!\n");
return -1;
}
return 0;
}
/* chunksize is 1 */
int write_28sf040(struct flashchip *flash, uint8_t *src, int start, int len)
{
int i;
chipaddr bios = flash->virtual_memory;
chipaddr dst = flash->virtual_memory + start;
for (i = 0; i < len; i++) {
/* transfer data from source to destination */
if (*src == 0xFF) {
dst++, src++;
/* If the data is 0xFF, don't program it */
continue;
}
/*issue AUTO PROGRAM command */
chip_writeb(AUTO_PGRM, dst);
chip_writeb(*src++, dst++);
/* wait for Toggle bit ready */
toggle_ready_jedec(bios);
}
return 0;
}
static int erase_28sf040(struct flashchip *flash)
{
chipaddr bios = flash->virtual_memory;
chip_writeb(CHIP_ERASE, bios);
chip_writeb(CHIP_ERASE, bios);
programmer_delay(10);
toggle_ready_jedec(bios);
if (check_erased_range(flash, 0, flash->total_size * 1024)) {
msg_cerr("ERASE FAILED!\n");
return -1;
}
return 0;
}
int erase_chip_28sf040(struct flashchip *flash, unsigned int addr, unsigned int blocklen)
{
if ((addr != 0) || (blocklen != flash->total_size * 1024)) {
msg_cerr("%s called with incorrect arguments\n",
__func__);
return -1;
}
return erase_28sf040(flash);
}
|
