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
|
/* liebert.c - support for Liebert UPS models via MultiLink cable.
Copyright (C) 2002 Russell Kroll <rkroll@exploits.org>
Based on old-style multilink.c driver:
Copyright (C) 2001 Rick Lyons <rick@powerup.com.au>
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "main.h"
#include "serial.h"
#include "attribute.h"
#define DRIVER_NAME "Liebert MultiLink UPS driver"
#define DRIVER_VERSION "1.06"
/* driver description structure */
upsdrv_info_t upsdrv_info = {
DRIVER_NAME,
DRIVER_VERSION,
"Russell Kroll <rkroll@exploits.org>\n" \
"Rick Lyons <rick@powerup.com.au>",
DRV_EXPERIMENTAL,
{ NULL }
};
#define ML_ONBATTERY 0x55
void upsdrv_shutdown(void)
{
/* Only implement "shutdown.default"; do not invoke
* general handling of other `sdcommands` here */
/* XXX: replace with a proper shutdown function (raise DTR) */
/* worse yet: stock cables don't support shutdown at all */
upslogx(LOG_ERR, "shutdown not supported");
if (handling_upsdrv_shutdown > 0)
set_exit_flag(EF_EXIT_FAILURE);
}
void upsdrv_initinfo(void)
{
char *tmp;
tmp = getval("mfr");
if (!tmp)
dstate_setinfo("ups.mfr", "Liebert");
else
dstate_setinfo("ups.mfr", "%s", tmp);
tmp = getval("model");
if (!tmp)
dstate_setinfo("ups.model", "MultiLink");
else
dstate_setinfo("ups.model", "%s", tmp);
}
/* require this many OBs or LBs before actually setting it */
#define DEBOUNCE 3
/* normal idle loop - keep up with the current state of the UPS */
void upsdrv_updateinfo(void)
{
unsigned char c;
unsigned int ob, lb;
static unsigned int ob_state = 0, ob_last = 0, ob_ctr = 0;
static unsigned int lb_state = 0, lb_last = 0, lb_ctr = 0;
ob = lb = 0;
/* the UPS connects RX to TX when on battery, so test for loopback */
ser_flush_in(upsfd, "", 0);
c = ML_ONBATTERY;
ser_send_char(upsfd, c);
if (ser_get_char(upsfd, &c, 1, 0) == 1) {
while (ser_get_char(upsfd, &c, 1, 0) == 1)
continue;
if (c == ML_ONBATTERY)
ob = 1;
}
if (ser_get_dcd(upsfd))
lb = 1;
/* state machine below to ensure status changes are debounced */
/* OB/OL state change: reset counter */
if (ob_last != ob)
ob_ctr = 0;
else
ob_ctr++;
upsdebugx(2, "OB: state %u last %u now %u ctr %u",
ob_state, ob_last, ob, ob_ctr);
if (ob_ctr >= DEBOUNCE) {
if (ob != ob_state) {
upsdebugx(2, "OB: toggling state");
if (ob_state == 0)
ob_state = 1;
else
ob_state = 0;
}
}
ob_last = ob;
/* now do it again for LB */
/* state change: reset counter */
if (lb_last != lb)
lb_ctr = 0;
else
lb_ctr++;
upsdebugx(2, "LB: state %u last %u now %u ctr %u",
lb_state, lb_last, lb, lb_ctr);
if (lb_ctr >= DEBOUNCE) {
if (lb != lb_state) {
upsdebugx(2, "LB: toggling state");
if (lb_state == 0)
lb_state = 1;
else
lb_state = 0;
}
}
lb_last = lb;
status_init();
if (ob_state == 1)
status_set("OB"); /* on battery */
else
status_set("OL"); /* on line */
if (lb_state == 1)
status_set("LB"); /* low battery */
status_commit();
dstate_dataok();
}
void upsdrv_makevartable(void)
{
addvar(VAR_VALUE, "mfr", "Override manufacturer name");
addvar(VAR_VALUE, "model", "Override model name");
}
void upsdrv_help(void)
{
}
void upsdrv_initups(void)
{
upsfd = ser_open(device_path);
/* Speed should not matter (see comments in upsdrv_updateinfo),
* but set it relatively low in case there are problems with higher
* speeds. */
ser_set_speed(upsfd, device_path, B9600);
/* raise RTS */
ser_set_rts(upsfd, 1);
}
void upsdrv_cleanup(void)
{
ser_close(upsfd, device_path);
}
|
