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
|
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Persistent EC options stored in EEPROM */
#include "board.h"
#include "console.h"
#include "eeprom.h"
#include "eoption.h"
#include "util.h"
#define EOPTION_MAGIC 0x456f /* Magic number for header 'Eo' */
#define EOPTION_VERSION_CURRENT 1 /* Current version of options data */
struct eoption_bool_data {
int offset; /* Word offset of option */
int mask; /* Option mask within byte */
const char *name; /* Option name */
};
/* Word offsets inside the EOPTION EEPROM block */
enum block_offsets {
OFFSET_HEADER = 0,
OFFSET_BOOL0,
};
/* Boolean options. Must be in the same order as enum eoption_bool, and must
* be terminated by an entry with a NULL name. */
static const struct eoption_bool_data bool_opts[] = {
{OFFSET_BOOL0, (1 << 0), "bool_test"},
{0, 0, NULL},
};
/* Read a uint32_t from the specified EEPROM *word* offset. */
static int read32(int offset, uint32_t *dest)
{
return eeprom_read(EEPROM_BLOCK_EOPTION, offset * 4, sizeof(uint32_t),
(char *)dest);
}
/* Write a uint32_t to the specified EEPROM *word* offset. */
static int write32(int offset, uint32_t v)
{
return eeprom_write(EEPROM_BLOCK_EOPTION, offset * 4, sizeof(v),
(char *)&v);
}
int eoption_get_bool(enum eoption_bool opt)
{
const struct eoption_bool_data *d = bool_opts + opt;
uint32_t v = 0;
read32(d->offset, &v);
return v & d->mask ? 1 : 0;
}
int eoption_set_bool(enum eoption_bool opt, int value)
{
const struct eoption_bool_data *d = bool_opts + opt;
uint32_t v;
int rv;
rv = read32(d->offset, &v);
if (rv != EC_SUCCESS)
return rv;
if (value)
v |= d->mask;
else
v &= ~d->mask;
return write32(d->offset, v);
}
/* Find an option by name. Returns the option index, or -1 if no match. */
static int find_option_by_name(const char *name,
const struct eoption_bool_data *d)
{
int i;
if (!name || !*name)
return -1;
for (i = 0; d->name; i++, d++) {
if (!strcasecmp(name, d->name))
return i;
}
return -1;
}
/*****************************************************************************/
/* Initialization */
int eoption_init(void)
{
uint32_t v;
int version;
/* Initialize EEPROM if necessary */
read32(OFFSET_HEADER, &v);
/* Check header */
if (v >> 16 != EOPTION_MAGIC)
v = EOPTION_MAGIC << 16; /* (implicitly sets version=0) */
version = (v >> 8) & 0xff;
if (version == EOPTION_VERSION_CURRENT)
return EC_SUCCESS;
/* TODO: should have a CRC if we start using this for real
* (non-debugging) options. */
/* Initialize fields which weren't set in previous versions */
if (version < 1)
write32(OFFSET_BOOL0, 0);
/* Update the header */
v = (v & ~0xff00) | (EOPTION_VERSION_CURRENT << 8);
return write32(OFFSET_HEADER, v);
}
/*****************************************************************************/
/* Console commands */
static int command_eoption_get(int argc, char **argv)
{
const struct eoption_bool_data *d;
int i;
/* If a signal is specified, print only that one */
if (argc == 2) {
i = find_option_by_name(argv[1], bool_opts);
if (i == -1)
return EC_ERROR_PARAM1;
d = bool_opts + i;
ccprintf(" %d %s\n", eoption_get_bool(i), d->name);
return EC_SUCCESS;
}
/* Otherwise print them all */
for (i = 0, d = bool_opts; d->name; i++, d++) {
ccprintf(" %d %s\n", eoption_get_bool(i), d->name);
/* We have enough options that we'll overflow the output buffer
* without flushing */
cflush();
}
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(optget, command_eoption_get,
"[name]",
"Print EC option(s)",
NULL);
static int command_eoption_set(int argc, char **argv)
{
char *e;
int v, i;
if (argc < 3)
return EC_ERROR_PARAM_COUNT;
v = strtoi(argv[2], &e, 0);
if (*e)
return EC_ERROR_PARAM2;
i = find_option_by_name(argv[1], bool_opts);
if (i == -1)
return EC_ERROR_PARAM1;
return eoption_set_bool(i, v);
}
DECLARE_CONSOLE_COMMAND(optset, command_eoption_set,
"name value",
"Set EC option",
NULL);
|
