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
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 Vladimir Serbinenko
*
* 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 <types.h>
#include <string.h>
#include <arch/io.h>
#include <device/device.h>
#include <device/smbus.h>
#include <smbios.h>
#include <console/console.h>
#include "lenovo.h"
#define ERROR_STRING "*INVALID*"
static device_t at24rf08c_find_bank(u8 bank)
{
device_t dev;
dev = dev_find_slot_on_smbus(1, 0x54 | bank);
if (!dev)
printk(BIOS_WARNING, "EEPROM not found\n");
return dev;
}
static int at24rf08c_read_byte(device_t dev, u8 addr)
{
int t = -1;
int j;
/* After a register write AT24RF08C (which we issued in init function)
sometimes stops responding. Retry several times in case of failure.
*/
for (j = 0; j < 100; j++) {
t = smbus_read_byte(dev, addr);
if (t >= 0)
return t;
}
return t;
}
static void at24rf08c_read_string_dev(device_t dev, u8 start,
u8 len, char *result)
{
int i;
for (i = 0; i < len; i++) {
int t = at24rf08c_read_byte(dev, start + i);
if (t < 0x20 || t > 0x7f) {
memcpy(result, ERROR_STRING, sizeof (ERROR_STRING));
return;
}
result[i] = t;
}
result[len] = '\0';
}
static void at24rf08c_read_string(u8 bank, u8 start, u8 len, char *result)
{
device_t dev;
dev = at24rf08c_find_bank(bank);
if (dev == 0) {
printk(BIOS_WARNING, "EEPROM not found\n");
memcpy(result, ERROR_STRING, sizeof (ERROR_STRING));
return;
}
at24rf08c_read_string_dev(dev, start, len, result);
}
const char *smbios_mainboard_serial_number(void)
{
static char result[12];
static int already_read;
if (already_read)
return result;
memset(result, 0, sizeof (result));
at24rf08c_read_string(0, 0x2e, 7, result);
already_read = 1;
return result;
}
const char *lenovo_mainboard_partnumber(void)
{
static char result[12];
static int already_read;
if (already_read)
return result;
memset (result, 0, sizeof (result));
at24rf08c_read_string(0, 0x27, 7, result);
already_read = 1;
return result;
}
const char *smbios_mainboard_product_name(void)
{
return lenovo_mainboard_partnumber();
}
void smbios_mainboard_set_uuid(u8 *uuid)
{
static char result[16];
unsigned i;
static int already_read;
device_t dev;
const int remap[16] = {
/* UUID byteswap. */
3, 2, 1, 0, 5, 4, 7, 6, 8, 9, 10, 11, 12, 13, 14, 15
};
if (already_read) {
memcpy (uuid, result, 16);
return;
}
memset (result, 0, sizeof (result));
dev = dev_find_slot_on_smbus(1, 0x56);
if (dev == 0) {
printk(BIOS_WARNING, "eeprom not found\n");
already_read = 1;
memset (uuid, 0, 16);
return;
}
for (i = 0; i < 16; i++) {
int t;
int j;
/* After a register write AT24RF08C (which we issued in init function) sometimes stops responding.
Retry several times in case of failure.
*/
for (j = 0; j < 100; j++) {
t = smbus_read_byte(dev, 0x12 + i);
if (t >= 0)
break;
}
if (t < 0) {
memset (result, 0, sizeof (result));
break;
}
result[remap[i]] = t;
}
already_read = 1;
memcpy (uuid, result, 16);
}
const char *smbios_mainboard_version(void)
{
static char result[100];
static int already_read;
device_t dev;
int len;
if (already_read)
return result;
memset (result, 0, sizeof (result));
dev = at24rf08c_find_bank(2);
if (dev == 0) {
memcpy(result, ERROR_STRING, sizeof (ERROR_STRING));
return result;
}
len = at24rf08c_read_byte(dev, 0x26) - 2;
if (len < 0 || len > sizeof(result) - 1) {
memcpy(result, ERROR_STRING, sizeof (ERROR_STRING));
return result;
}
at24rf08c_read_string_dev(dev, 0x27, len, result);
already_read = 1;
return result;
}
|
