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
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
|
/*
* This file is part of the flashrom project.
*
* Copyright (C) 2010 Carl-Daniel Hailfinger
*
* 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; version 2 of the License.
*
* 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"
#include "spi.h"
/* Prettyprint the status register. Works for Atmel A25/A26 series. */
static void spi_prettyprint_status_register_atmel_at25_srpl(uint8_t status)
{
msg_cdbg("Chip status register: Sector Protection Register Lock (SRPL) "
"is %sset\n", (status & (1 << 7)) ? "" : "not ");
}
static void spi_prettyprint_status_register_atmel_at25_epewpp(uint8_t status)
{
msg_cdbg("Chip status register: Erase/Program Error (EPE) "
"is %sset\n", (status & (1 << 5)) ? "" : "not ");
msg_cdbg("Chip status register: WP# pin (WPP) "
"is %sasserted\n", (status & (1 << 4)) ? "not " : "");
}
static void spi_prettyprint_status_register_atmel_at25_swp(uint8_t status)
{
msg_cdbg("Chip status register: Software Protection Status (SWP): ");
switch (status & (3 << 2)) {
case 0x0 << 2:
msg_cdbg("no sectors are protected\n");
break;
case 0x1 << 2:
msg_cdbg("some sectors are protected\n");
/* FIXME: Read individual Sector Protection Registers. */
break;
case 0x3 << 2:
msg_cdbg("all sectors are protected\n");
break;
default:
msg_cdbg("reserved for future use\n");
break;
}
}
int spi_prettyprint_status_register_at25df(struct flashctx *flash)
{
uint8_t status;
status = spi_read_status_register(flash);
msg_cdbg("Chip status register is %02x\n", status);
spi_prettyprint_status_register_atmel_at25_srpl(status);
spi_prettyprint_status_register_bit(status, 6);
spi_prettyprint_status_register_atmel_at25_epewpp(status);
spi_prettyprint_status_register_atmel_at25_swp(status);
spi_prettyprint_status_register_welwip(status);
return 0;
}
int spi_prettyprint_status_register_at25df_sec(struct flashctx *flash)
{
/* FIXME: We should check the security lockdown. */
msg_cdbg("Ignoring security lockdown (if present)\n");
msg_cdbg("Ignoring status register byte 2\n");
return spi_prettyprint_status_register_at25df(flash);
}
int spi_prettyprint_status_register_at25f(struct flashctx *flash)
{
uint8_t status;
status = spi_read_status_register(flash);
msg_cdbg("Chip status register is %02x\n", status);
spi_prettyprint_status_register_atmel_at25_srpl(status);
spi_prettyprint_status_register_bit(status, 6);
spi_prettyprint_status_register_atmel_at25_epewpp(status);
spi_prettyprint_status_register_bit(status, 3);
msg_cdbg("Chip status register: Block Protect 0 (BP0) is "
"%sset, %s sectors are protected\n",
(status & (1 << 2)) ? "" : "not ",
(status & (1 << 2)) ? "all" : "no");
spi_prettyprint_status_register_welwip(status);
return 0;
}
int spi_prettyprint_status_register_at25fs010(struct flashctx *flash)
{
uint8_t status;
status = spi_read_status_register(flash);
msg_cdbg("Chip status register is %02x\n", status);
msg_cdbg("Chip status register: Status Register Write Protect (WPEN) "
"is %sset\n", (status & (1 << 7)) ? "" : "not ");
msg_cdbg("Chip status register: Bit 6 / Block Protect 4 (BP4) is "
"%sset\n", (status & (1 << 6)) ? "" : "not ");
msg_cdbg("Chip status register: Bit 5 / Block Protect 3 (BP3) is "
"%sset\n", (status & (1 << 5)) ? "" : "not ");
msg_cdbg("Chip status register: Bit 4 is "
"%sset\n", (status & (1 << 4)) ? "" : "not ");
msg_cdbg("Chip status register: Bit 3 / Block Protect 1 (BP1) is "
"%sset\n", (status & (1 << 3)) ? "" : "not ");
msg_cdbg("Chip status register: Bit 2 / Block Protect 0 (BP0) is "
"%sset\n", (status & (1 << 2)) ? "" : "not ");
/* FIXME: Pretty-print detailed sector protection status. */
spi_prettyprint_status_register_welwip(status);
return 0;
}
int spi_prettyprint_status_register_at25fs040(struct flashctx *flash)
{
uint8_t status;
status = spi_read_status_register(flash);
msg_cdbg("Chip status register is %02x\n", status);
msg_cdbg("Chip status register: Status Register Write Protect (WPEN) "
"is %sset\n", (status & (1 << 7)) ? "" : "not ");
msg_cdbg("Chip status register: Bit 6 / Block Protect 4 (BP4) is "
"%sset\n", (status & (1 << 6)) ? "" : "not ");
msg_cdbg("Chip status register: Bit 5 / Block Protect 3 (BP3) is "
"%sset\n", (status & (1 << 5)) ? "" : "not ");
msg_cdbg("Chip status register: Bit 4 / Block Protect 2 (BP2) is "
"%sset\n", (status & (1 << 4)) ? "" : "not ");
msg_cdbg("Chip status register: Bit 3 / Block Protect 1 (BP1) is "
"%sset\n", (status & (1 << 3)) ? "" : "not ");
msg_cdbg("Chip status register: Bit 2 / Block Protect 0 (BP0) is "
"%sset\n", (status & (1 << 2)) ? "" : "not ");
/* FIXME: Pretty-print detailed sector protection status. */
spi_prettyprint_status_register_welwip(status);
return 0;
}
int spi_prettyprint_status_register_atmel_at26df081a(struct flashctx *flash)
{
uint8_t status;
status = spi_read_status_register(flash);
msg_cdbg("Chip status register is %02x\n", status);
spi_prettyprint_status_register_atmel_at25_srpl(status);
msg_cdbg("Chip status register: Sequential Program Mode Status (SPM) "
"is %sset\n", (status & (1 << 6)) ? "" : "not ");
spi_prettyprint_status_register_atmel_at25_epewpp(status);
spi_prettyprint_status_register_atmel_at25_swp(status);
spi_prettyprint_status_register_welwip(status);
return 0;
}
int spi_disable_blockprotect_at25df(struct flashctx *flash)
{
uint8_t status;
int result;
status = spi_read_status_register(flash);
/* If block protection is disabled, stop here. */
if ((status & (3 << 2)) == 0)
return 0;
msg_cdbg("Some block protection in effect, disabling\n");
if (status & (1 << 7)) {
msg_cdbg("Need to disable Sector Protection Register Lock\n");
if ((status & (1 << 4)) == 0) {
msg_cerr("WP# pin is active, disabling "
"write protection is impossible.\n");
return 1;
}
/* All bits except bit 7 (SPRL) are readonly. */
result = spi_write_status_register(flash, status & ~(1 << 7));
if (result) {
msg_cerr("spi_write_status_register failed\n");
return result;
}
}
/* Global unprotect. Make sure to mask SPRL as well. */
result = spi_write_status_register(flash, status & ~0xbc);
if (result) {
msg_cerr("spi_write_status_register failed\n");
return result;
}
status = spi_read_status_register(flash);
if ((status & (3 << 2)) != 0) {
msg_cerr("Block protection could not be disabled!\n");
return 1;
}
return 0;
}
int spi_disable_blockprotect_at25df_sec(struct flashctx *flash)
{
/* FIXME: We should check the security lockdown. */
msg_cinfo("Ignoring security lockdown (if present)\n");
return spi_disable_blockprotect_at25df(flash);
}
int spi_disable_blockprotect_at25f(struct flashctx *flash)
{
/* spi_disable_blockprotect_at25df is not really the right way to do
* this, but the side effects of said function work here as well.
*/
return spi_disable_blockprotect_at25df(flash);
}
int spi_disable_blockprotect_at25fs010(struct flashctx *flash)
{
uint8_t status;
int result;
status = spi_read_status_register(flash);
/* If block protection is disabled, stop here. */
if ((status & 0x6c) == 0)
return 0;
msg_cdbg("Some block protection in effect, disabling\n");
if (status & (1 << 7)) {
msg_cdbg("Need to disable Status Register Write Protect\n");
/* Clear bit 7 (WPEN). */
result = spi_write_status_register(flash, status & ~(1 << 7));
if (result) {
msg_cerr("spi_write_status_register failed\n");
return result;
}
}
/* Global unprotect. Make sure to mask WPEN as well. */
result = spi_write_status_register(flash, status & ~0xec);
if (result) {
msg_cerr("spi_write_status_register failed\n");
return result;
}
status = spi_read_status_register(flash);
if ((status & 0x6c) != 0) {
msg_cerr("Block protection could not be disabled!\n");
return 1;
}
return 0;
}
int spi_disable_blockprotect_at25fs040(struct flashctx *flash)
{
uint8_t status;
int result;
status = spi_read_status_register(flash);
/* If block protection is disabled, stop here. */
if ((status & 0x7c) == 0)
return 0;
msg_cdbg("Some block protection in effect, disabling\n");
if (status & (1 << 7)) {
msg_cdbg("Need to disable Status Register Write Protect\n");
/* Clear bit 7 (WPEN). */
result = spi_write_status_register(flash, status & ~(1 << 7));
if (result) {
msg_cerr("spi_write_status_register failed\n");
return result;
}
}
/* Global unprotect. Make sure to mask WPEN as well. */
result = spi_write_status_register(flash, status & ~0xfc);
if (result) {
msg_cerr("spi_write_status_register failed\n");
return result;
}
status = spi_read_status_register(flash);
if ((status & 0x7c) != 0) {
msg_cerr("Block protection could not be disabled!\n");
return 1;
}
return 0;
}
|
