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
|
/*
* Copyright (C) 2014 Gateworks Corporation
* Author: Tim Harvey <tharvey@gateworks.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <errno.h>
#include <i2c.h>
#include <malloc.h>
#include <asm/bitops.h>
#include "gsc.h"
#include "ventana_eeprom.h"
/* read ventana EEPROM, check for validity, and return baseboard type */
int
read_eeprom(int bus, struct ventana_board_info *info)
{
int i;
int chksum;
char baseboard;
int type;
unsigned char *buf = (unsigned char *)info;
memset(info, 0, sizeof(*info));
/*
* On a board with a missing/depleted backup battery for GSC, the
* board may be ready to probe the GSC before its firmware is
* running. We will wait here indefinately for the GSC/EEPROM.
*/
while (1) {
if (0 == i2c_set_bus_num(bus) &&
0 == i2c_probe(GSC_EEPROM_ADDR))
break;
mdelay(1);
}
/* read eeprom config section */
if (gsc_i2c_read(GSC_EEPROM_ADDR, 0x00, 1, buf, sizeof(*info))) {
puts("EEPROM: Failed to read EEPROM\n");
return GW_UNKNOWN;
}
/* sanity checks */
if (info->model[0] != 'G' || info->model[1] != 'W') {
puts("EEPROM: Invalid Model in EEPROM\n");
return GW_UNKNOWN;
}
/* validate checksum */
for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
chksum += buf[i];
if ((info->chksum[0] != chksum>>8) ||
(info->chksum[1] != (chksum&0xff))) {
puts("EEPROM: Failed EEPROM checksum\n");
return GW_UNKNOWN;
}
/* original GW5400-A prototype */
baseboard = info->model[3];
if (strncasecmp((const char *)info->model, "GW5400-A", 8) == 0)
baseboard = '0';
switch (baseboard) {
case '0': /* original GW5400-A prototype */
type = GW54proto;
break;
case '1':
type = GW51xx;
break;
case '2':
type = GW52xx;
break;
case '3':
type = GW53xx;
break;
case '4':
type = GW54xx;
break;
case '5':
if (info->model[4] == '1') {
type = GW551x;
break;
} else if (info->model[4] == '2') {
type = GW552x;
break;
} else if (info->model[4] == '3') {
type = GW553x;
break;
}
/* fall through */
default:
printf("EEPROM: Unknown model in EEPROM: %s\n", info->model);
type = GW_UNKNOWN;
break;
}
return type;
}
/* list of config bits that the bootloader will remove from dtb if not set */
struct ventana_eeprom_config econfig[] = {
{ "eth0", "ethernet0", EECONFIG_ETH0 },
{ "usb0", NULL, EECONFIG_USB0 },
{ "usb1", NULL, EECONFIG_USB1 },
{ "mmc0", NULL, EECONFIG_SD0 },
{ "mmc1", NULL, EECONFIG_SD1 },
{ "mmc2", NULL, EECONFIG_SD2 },
{ "mmc3", NULL, EECONFIG_SD3 },
{ /* Sentinel */ }
};
#ifdef CONFIG_CMD_EECONFIG
static struct ventana_eeprom_config *get_config(const char *name)
{
struct ventana_eeprom_config *cfg = econfig;
while (cfg->name) {
if (0 == strcmp(name, cfg->name))
return cfg;
cfg++;
}
return NULL;
}
static u8 econfig_bytes[sizeof(ventana_info.config)];
static int econfig_init = -1;
int do_econfig(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
struct ventana_eeprom_config *cfg;
struct ventana_board_info *info = &ventana_info;
int i;
if (argc < 2)
return CMD_RET_USAGE;
/* initialize */
if (econfig_init != 1) {
memcpy(econfig_bytes, info->config, sizeof(econfig_bytes));
econfig_init = 1;
}
/* list configs */
if ((strncmp(argv[1], "list", 4) == 0)) {
cfg = econfig;
while (cfg->name) {
printf("%s: %d\n", cfg->name,
test_bit(cfg->bit, econfig_bytes) ? 1 : 0);
cfg++;
}
}
/* save */
else if ((strncmp(argv[1], "save", 4) == 0)) {
unsigned char *buf = (unsigned char *)info;
int chksum;
/* calculate new checksum */
memcpy(info->config, econfig_bytes, sizeof(econfig_bytes));
for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
chksum += buf[i];
debug("old chksum:0x%04x\n",
(info->chksum[0] << 8) | info->chksum[1]);
debug("new chksum:0x%04x\n", chksum);
info->chksum[0] = chksum >> 8;
info->chksum[1] = chksum & 0xff;
/* write new config data */
if (gsc_i2c_write(GSC_EEPROM_ADDR, info->config - (u8 *)info,
1, econfig_bytes, sizeof(econfig_bytes))) {
printf("EEPROM: Failed updating config\n");
return CMD_RET_FAILURE;
}
/* write new config data */
if (gsc_i2c_write(GSC_EEPROM_ADDR, info->chksum - (u8 *)info,
1, info->chksum, 2)) {
printf("EEPROM: Failed updating checksum\n");
return CMD_RET_FAILURE;
}
printf("Config saved to EEPROM\n");
}
/* get config */
else if (argc == 2) {
cfg = get_config(argv[1]);
if (cfg) {
printf("%s: %d\n", cfg->name,
test_bit(cfg->bit, econfig_bytes) ? 1 : 0);
} else {
printf("invalid config: %s\n", argv[1]);
return CMD_RET_FAILURE;
}
}
/* set config */
else if (argc == 3) {
cfg = get_config(argv[1]);
if (cfg) {
if (simple_strtol(argv[2], NULL, 10)) {
test_and_set_bit(cfg->bit, econfig_bytes);
printf("Enabled %s\n", cfg->name);
} else {
test_and_clear_bit(cfg->bit, econfig_bytes);
printf("Disabled %s\n", cfg->name);
}
} else {
printf("invalid config: %s\n", argv[1]);
return CMD_RET_FAILURE;
}
}
else
return CMD_RET_USAGE;
return CMD_RET_SUCCESS;
}
U_BOOT_CMD(
econfig, 3, 0, do_econfig,
"EEPROM configuration",
"list - list config\n"
"save - save config to EEPROM\n"
"<name> - get config 'name'\n"
"<name> [0|1] - set config 'name' to value\n"
);
#endif /* CONFIG_CMD_EECONFIG */
|
