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blazer.c
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blazer.c
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/*
* blazer.c: driver core for Megatec/Q1 protocol based UPSes
*
* A document describing the protocol implemented by this driver can be
* found online at http://www.networkupstools.org/ups-protocols/megatec.html
*
* Copyright (C)
* 2008,2009 - Arjen de Korte <adkorte-guest@alioth.debian.org>
* 2012 - Arnaud Quette <ArnaudQuette@Eaton.com>
*
* 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 "main.h"
#include "blazer.h"
#include <math.h>
static int ondelay = 3; /* minutes */
static int offdelay = 30; /* seconds */
static int proto;
static int online = 1;
static struct {
double packs; /* battery voltage multiplier */
struct {
double nom; /* nominal runtime on battery (full load) */
double est; /* estimated runtime remaining (full load) */
double exp; /* load exponent */
} runt;
struct {
double act; /* actual battery voltage */
double high; /* battery float voltage */
double nom; /* nominal battery voltage */
double low; /* battery low voltage */
} volt;
struct {
double act; /* actual battery charge */
long time; /* recharge time from empty to full */
} chrg;
} batt = { 1, { -1, 0, 0 }, { -1, -1, -1, -1 }, { -1, 43200 } };
static struct {
double act; /* actual load (reported by UPS) */
double low; /* idle load */
double eff; /* effective load */
} load = { 0, 0.1, 1 };
static time_t lastpoll = 0;
/*
* This little structure defines the various flavors of the Megatec protocol.
* Only the .name and .status are mandatory, .rating and .vendor elements are
* optional. If only some models support the last two, fill them in anyway
* and tell people to use the 'norating' and 'novendor' options to bypass
* getting them.
*/
static const struct {
const char *name;
const char *status;
const char *rating;
const char *vendor;
} command[] = {
{ "megatec", "Q1\r", "F\r", "I\r" },
{ "mustek", "QS\r", "F\r", "I\r" },
{ "megatec/old", "D\r", "F\r", "I\r" },
{ "zinto", "Q1\r", "F\r", "FW?\r" },
{ NULL }
};
/*
* Do whatever we think is needed when we read a battery voltage from the UPS.
* Basically all it does now, is guestimating the battery charge, but this
* could be extended.
*/
static double blazer_battery(const char *ptr, char **endptr)
{
batt.volt.act = batt.packs * strtod(ptr, endptr);
if ((!getval("runtimecal") || !dstate_getinfo("battery.charge")) &&
(batt.volt.low > 0) && (batt.volt.high > batt.volt.low)) {
batt.chrg.act = 100 * (batt.volt.act - batt.volt.low) / (batt.volt.high - batt.volt.low);
if (batt.chrg.act < 0) {
batt.chrg.act = 0;
}
if (batt.chrg.act > 100) {
batt.chrg.act = 100;
}
dstate_setinfo("battery.charge", "%.0f", batt.chrg.act);
}
return batt.volt.act;
}
/*
* Do whatever we think is needed when we read the load from the UPS.
*/
static double blazer_load(const char *ptr, char **endptr)
{
load.act = strtod(ptr, endptr);
load.eff = pow(load.act / 100, batt.runt.exp);
if (load.eff < load.low) {
load.eff = load.low;
}
return load.act;
}
/*
* The battery voltage will quickly return to at least the nominal value after
* discharging them. For overlapping battery.voltage.low/high ranges therefor
* choose the one with the highest multiplier.
*/
static double blazer_packs(const char *ptr, char **endptr)
{
const double packs[] = {
120, 100, 80, 60, 48, 36, 30, 24, 18, 12, 8, 6, 4, 3, 2, 1, 0.5, -1
};
const char *val;
int i;
val = dstate_getinfo("battery.voltage.nominal");
batt.volt.nom = strtod(val ? val : ptr, endptr);
for (i = 0; packs[i] > 0; i++) {
if (packs[i] * batt.volt.act > 1.2 * batt.volt.nom) {
continue;
}
if (packs[i] * batt.volt.act < 0.8 * batt.volt.nom) {
upslogx(LOG_INFO, "Can't autodetect number of battery packs [%.0f/%.2f]", batt.volt.nom, batt.volt.act);
break;
}
batt.packs = packs[i];
break;
}
return batt.volt.nom;
}
static int blazer_status(const char *cmd)
{
const struct {
const char *var;
const char *fmt;
double (*conv)(const char *, char **);
} status[] = {
{ "input.voltage", "%.1f", strtod },
{ "input.voltage.fault", "%.1f", strtod },
{ "output.voltage", "%.1f", strtod },
{ "ups.load", "%.0f", blazer_load },
{ "input.frequency", "%.1f", strtod },
{ "battery.voltage", "%.2f", blazer_battery },
{ "ups.temperature", "%.1f", strtod },
{ NULL }
};
char buf[SMALLBUF], *val, *last = NULL;
int i;
/*
* > [Q1\r]
* < [(226.0 195.0 226.0 014 49.0 27.5 30.0 00001000\r]
* 01234567890123456789012345678901234567890123456
* 0 1 2 3 4
*/
if (blazer_command(cmd, buf, sizeof(buf)) < 46) {
upsdebugx(2, "%s: short reply", __func__);
return -1;
}
if (buf[0] != '(') {
upsdebugx(2, "%s: invalid start character [%02x]", __func__, buf[0]);
return -1;
}
for (i = 0, val = strtok_r(buf+1, " ", &last); status[i].var; i++, val = strtok_r(NULL, " \r\n", &last)) {
if (!val) {
upsdebugx(2, "%s: parsing failed", __func__);
return -1;
}
if (strspn(val, "0123456789.") != strlen(val)) {
upsdebugx(2, "%s: non numerical value [%s]", __func__, val);
continue;
}
dstate_setinfo(status[i].var, status[i].fmt, status[i].conv(val, NULL));
}
if (!val) {
upsdebugx(2, "%s: parsing failed", __func__);
return -1;
}
if (strspn(val, "01") != 8) {
upsdebugx(2, "Invalid status [%s]", val);
return -1;
}
if (val[7] == '1') { /* Beeper On */
dstate_setinfo("ups.beeper.status", "enabled");
} else {
dstate_setinfo("ups.beeper.status", "disabled");
}
if (val[4] == '1') { /* UPS Type is Standby (0 is On_line) */
dstate_setinfo("ups.type", "offline / line interactive");
} else {
dstate_setinfo("ups.type", "online");
}
status_init();
if (val[0] == '1') { /* Utility Fail (Immediate) */
status_set("OB");
online = 0;
} else {
status_set("OL");
online = 1;
}
if (val[1] == '1') { /* Battery Low */
status_set("LB");
}
if (val[2] == '1') { /* Bypass/Boost or Buck Active */
double vi, vo;
vi = strtod(dstate_getinfo("input.voltage"), NULL);
vo = strtod(dstate_getinfo("output.voltage"), NULL);
if (vo < 0.5 * vi) {
upsdebugx(2, "%s: output voltage too low", __func__);
} else if (vo < 0.95 * vi) {
status_set("TRIM");
} else if (vo < 1.05 * vi) {
status_set("BYPASS");
} else if (vo < 1.5 * vi) {
status_set("BOOST");
} else {
upsdebugx(2, "%s: output voltage too high", __func__);
}
}
if (val[5] == '1') { /* Test in Progress */
status_set("CAL");
}
alarm_init();
if (val[3] == '1') { /* UPS Failed */
alarm_set("UPS selftest failed!");
}
if (val[6] == '1') { /* Shutdown Active */
alarm_set("Shutdown imminent!");
status_set("FSD");
}
alarm_commit();
status_commit();
return 0;
}
static int blazer_rating(const char *cmd)
{
const struct {
const char *var;
const char *fmt;
double (*conv)(const char *, char **);
} rating[] = {
{ "input.voltage.nominal", "%.0f", strtod },
{ "input.current.nominal", "%.1f", strtod },
{ "battery.voltage.nominal", "%.1f", blazer_packs },
{ "input.frequency.nominal", "%.0f", strtod },
{ NULL }
};
char buf[SMALLBUF], *val, *last = NULL;
int i;
/*
* > [F\r]
* < [#220.0 000 024.0 50.0\r]
* 0123456789012345678901
* 0 1 2
*/
if (blazer_command(cmd, buf, sizeof(buf)) < 22) {
upsdebugx(2, "%s: short reply", __func__);
return -1;
}
if (buf[0] != '#') {
upsdebugx(2, "%s: invalid start character [%02x]", __func__, buf[0]);
return -1;
}
for (i = 0, val = strtok_r(buf+1, " ", &last); rating[i].var; i++, val = strtok_r(NULL, " \r\n", &last)) {
if (!val) {
upsdebugx(2, "%s: parsing failed", __func__);
return -1;
}
if (strspn(val, "0123456789.") != strlen(val)) {
upsdebugx(2, "%s: non numerical value [%s]", __func__, val);
continue;
}
dstate_setinfo(rating[i].var, rating[i].fmt, rating[i].conv(val, NULL));
}
return 0;
}
static int blazer_vendor(const char *cmd)
{
const struct {
const char *var;
const int len;
} information[] = {
{ "ups.mfr", 15 },
{ "ups.model", 10 },
{ "ups.firmware", 10 },
{ NULL }
};
char buf[SMALLBUF];
int i, index;
/*
* > [I\r]
* < [#------------- ------ VT12046Q \r]
* 012345678901234567890123456789012345678
* 0 1 2 3
*/
if (blazer_command(cmd, buf, sizeof(buf)) < 39) {
upsdebugx(2, "%s: short reply", __func__);
return -1;
}
if (buf[0] != '#') {
upsdebugx(2, "%s: invalid start character [%02x]", __func__, buf[0]);
return -1;
}
for (i = 0, index = 1; information[i].var; index += information[i++].len+1) {
char val[SMALLBUF];
snprintf(val, sizeof(val), "%.*s", information[i].len, &buf[index]);
dstate_setinfo(information[i].var, "%s", rtrim(val, ' '));
}
return 0;
}
static int blazer_instcmd(const char *cmdname, const char *extra)
{
const struct {
const char *cmd;
const char *ups;
} instcmd[] = {
{ "beeper.toggle", "Q\r" },
{ "load.off", "S00R0000\r" },
{ "load.on", "C\r" },
{ "shutdown.stop", "C\r" },
{ "test.battery.start.deep", "TL\r" },
{ "test.battery.start.quick", "T\r" },
{ "test.battery.stop", "CT\r" },
{ NULL }
};
char buf[SMALLBUF] = "";
int i;
upslogx(LOG_INFO, "instcmd(%s, %s)", cmdname, extra ? extra : "[NULL]");
for (i = 0; instcmd[i].cmd; i++) {
if (strcasecmp(cmdname, instcmd[i].cmd)) {
continue;
}
snprintf(buf, sizeof(buf), "%s", instcmd[i].ups);
/*
* If a command is invalid, it will be echoed back
* As an exception, Best UPS units will report "ACK" in case of success!
* Other UPSes will reply "(ACK" in case of success.
*/
if (blazer_command(buf, buf, sizeof(buf)) > 0) {
if (strncmp(buf, "ACK", 3) && strncmp(buf, "(ACK", 4)) {
upslogx(LOG_ERR, "instcmd: command [%s] failed", cmdname);
return STAT_INSTCMD_FAILED;
}
}
upslogx(LOG_INFO, "instcmd: command [%s] handled", cmdname);
return STAT_INSTCMD_HANDLED;
}
if (!strcasecmp(cmdname, "shutdown.return")) {
/*
* Sn: Shutdown after n minutes and then turn on when mains is back
* SnRm: Shutdown after n minutes and then turn on after m minutes
* Accepted values for n: .2 -> .9 , 01 -> 10
* Accepted values for m: 0001 -> 9999
* Note: "S01R0001" and "S01R0002" may not work on early (GE)
* firmware versions. The failure mode is that the UPS turns
* off and never returns. The fix is to push the return value
* up by 2, i.e. S01R0003, and it will return online properly.
* (thus the default of ondelay=3 mins)
*/
if (ondelay == 0) {
if (offdelay < 60) {
snprintf(buf, sizeof(buf), "S.%d\r", offdelay / 6);
} else {
snprintf(buf, sizeof(buf), "S%02d\r", offdelay / 60);
}
} else if (offdelay < 60) {
snprintf(buf, sizeof(buf), "S.%dR%04d\r", offdelay / 6, ondelay);
} else {
snprintf(buf, sizeof(buf), "S%02dR%04d\r", offdelay / 60, ondelay);
}
} else if (!strcasecmp(cmdname, "shutdown.stayoff")) {
/*
* SnR0000
* Shutdown after n minutes and stay off
* Accepted values for n: .2 -> .9 , 01 -> 10
*/
if (offdelay < 60) {
snprintf(buf, sizeof(buf), "S.%dR0000\r", offdelay / 6);
} else {
snprintf(buf, sizeof(buf), "S%02dR0000\r", offdelay / 60);
}
} else if (!strcasecmp(cmdname, "test.battery.start")) {
int delay = extra ? strtol(extra, NULL, 10) : 10;
if ((delay < 1) || (delay > 99)) {
upslogx(LOG_ERR, "instcmd: command [%s] failed, delay [%s] out of range", cmdname, extra);
return STAT_INSTCMD_FAILED;
}
snprintf(buf, sizeof(buf), "T%02d\r", delay);
} else {
upslogx(LOG_ERR, "instcmd: command [%s] not found", cmdname);
return STAT_INSTCMD_UNKNOWN;
}
/*
* If a command is invalid, it will be echoed back.
* As an exception, Best UPS units will report "ACK" in case of success!
* Other UPSes will reply "(ACK" in case of success.
*/
if (blazer_command(buf, buf, sizeof(buf)) > 0) {
if (strncmp(buf, "ACK", 3) && strncmp(buf, "(ACK", 4)) {
upslogx(LOG_ERR, "instcmd: command [%s] failed", cmdname);
return STAT_INSTCMD_FAILED;
}
}
upslogx(LOG_INFO, "instcmd: command [%s] handled", cmdname);
return STAT_INSTCMD_HANDLED;
}
void blazer_makevartable(void)
{
addvar(VAR_VALUE, "ondelay", "Delay before UPS startup (minutes)");
addvar(VAR_VALUE, "offdelay", "Delay before UPS shutdown (seconds)");
addvar(VAR_VALUE, "runtimecal", "Parameters used for runtime calculation");
addvar(VAR_VALUE, "chargetime", "Nominal charge time for UPS battery");
addvar(VAR_VALUE, "idleload", "Minimum load to be used for runtime calculation");
addvar(VAR_FLAG, "norating", "Skip reading rating information from UPS");
addvar(VAR_FLAG, "novendor", "Skip reading vendor information from UPS");
addvar(VAR_FLAG, "protocol", "Preselect communication protocol (skip autodetection)");
}
void blazer_initups(void)
{
const char *val;
val = getval("ondelay");
if (val) {
ondelay = strtol(val, NULL, 10);
}
if ((ondelay < 0) || (ondelay > 9999)) {
fatalx(EXIT_FAILURE, "Start delay '%d' out of range [0..9999]", ondelay);
}
val = getval("offdelay");
if (val) {
offdelay = strtol(val, NULL, 10);
}
if ((offdelay < 12) || (offdelay > 600)) {
fatalx(EXIT_FAILURE, "Shutdown delay '%d' out of range [12..600]", offdelay);
}
/* Truncate to nearest setable value */
if (offdelay < 60) {
offdelay -= (offdelay % 6);
} else {
offdelay -= (offdelay % 60);
}
val = dstate_getinfo("battery.voltage.high");
if (val) {
batt.volt.high = strtod(val, NULL);
}
val = dstate_getinfo("battery.voltage.low");
if (val) {
batt.volt.low = strtod(val, NULL);
}
}
static void blazer_initbattery(void)
{
const char *val;
/* If no values were provided by the user in ups.conf, try to guesstimate
* battery.charge, but announce it! */
if ((batt.volt.nom != 1) && ((batt.volt.high == -1) || (batt.volt.low == -1))) {
upslogx(LOG_INFO, "No values provided for battery high/low voltages in ups.conf\n");
/* Basic formula, which should cover most cases */
batt.volt.low = 104 * batt.volt.nom / 120;
batt.volt.high = 130 * batt.volt.nom / 120;
/* Publish these data too */
dstate_setinfo("battery.voltage.low", "%.2f", batt.volt.low);
dstate_setinfo("battery.voltage.high", "%.2f", batt.volt.high);
upslogx(LOG_INFO, "Using 'guestimation' (low: %f, high: %f)!", batt.volt.low, batt.volt.high);
}
val = getval("runtimecal");
if (val) {
double rh, lh, rl, ll;
time(&lastpoll);
if (sscanf(val, "%lf,%lf,%lf,%lf", &rh, &lh, &rl, &ll) < 4) {
fatalx(EXIT_FAILURE, "Insufficient parameters for runtimecal");
}
if ((rl < rh) || (rh <= 0)) {
fatalx(EXIT_FAILURE, "Parameter out of range (runtime)");
}
if ((lh > 100) || (ll > lh) || (ll <= 0)) {
fatalx(EXIT_FAILURE, "Parameter out of range (load)");
}
batt.runt.exp = log(rl / rh) / log(lh / ll);
upsdebugx(2, "battery runtime exponent : %.3f", batt.runt.exp);
batt.runt.nom = rh * pow(lh / 100, batt.runt.exp);
upsdebugx(2, "battery runtime nominal : %.1f", batt.runt.nom);
} else {
upslogx(LOG_INFO, "Battery runtime will not be calculated (runtimecal not set)");
return;
}
if (batt.chrg.act < 0) {
batt.volt.low = batt.volt.nom;
batt.volt.high = 1.15 * batt.volt.nom;
blazer_battery(dstate_getinfo("battery.voltage"), NULL);
}
val = dstate_getinfo("battery.charge");
if (val) {
batt.runt.est = batt.runt.nom * strtod(val, NULL) / 100;
upsdebugx(2, "battery runtime estimate : %.1f", batt.runt.est);
} else {
fatalx(EXIT_FAILURE, "Initial battery charge undetermined");
}
val = getval("chargetime");
if (val) {
batt.chrg.time = strtol(val, NULL, 10);
if (batt.chrg.time <= 0) {
fatalx(EXIT_FAILURE, "Charge time out of range [1..s]");
}
upsdebugx(2, "battery charge time : %ld", batt.chrg.time);
} else {
upslogx(LOG_INFO, "No charge time specified, using built in default [%ld seconds]", batt.chrg.time);
}
val = getval("idleload");
if (val) {
load.low = strtod(val, NULL) / 100;
if ((load.low <= 0) || (load.low > 1)) {
fatalx(EXIT_FAILURE, "Idle load out of range [0..100]");
}
upsdebugx(2, "minimum load used (idle) : %.3f", load.low);
} else {
upslogx(LOG_INFO, "No idle load specified, using built in default [%.1f %%]", 100 * load.low);
}
}
void blazer_initinfo(void)
{
const char *protocol = getval("protocol");
int retry;
for (proto = 0; command[proto].status; proto++) {
int ret;
if (protocol && strcasecmp(protocol, command[proto].name)) {
upsdebugx(2, "Skipping %s protocol...", command[proto].name);
continue;
}
upsdebugx(2, "Trying %s protocol...", command[proto].name);
for (retry = 1; retry <= MAXTRIES; retry++) {
ret = blazer_status(command[proto].status);
if (ret < 0) {
upsdebugx(2, "Status read %d failed", retry);
continue;
}
upsdebugx(2, "Status read in %d tries", retry);
break;
}
if (!ret) {
upslogx(LOG_INFO, "Supported UPS detected with %s protocol", command[proto].name);
break;
}
}
if (!command[proto].status) {
fatalx(EXIT_FAILURE, "No supported UPS detected");
}
if (command[proto].rating && !testvar("norating")) {
int ret;
for (retry = 1; retry <= MAXTRIES; retry++) {
ret = blazer_rating(command[proto].rating);
if (ret < 0) {
upsdebugx(1, "Rating read %d failed", retry);
continue;
}
upsdebugx(2, "Ratings read in %d tries", retry);
break;
}
if (ret) {
upslogx(LOG_DEBUG, "Rating information unavailable");
}
}
if (command[proto].vendor && !testvar("novendor")) {
int ret;
for (retry = 1; retry <= MAXTRIES; retry++) {
ret = blazer_vendor(command[proto].vendor);
if (ret < 0) {
upsdebugx(1, "Vendor information read %d failed", retry);
continue;
}
upslogx(LOG_INFO, "Vendor information read in %d tries", retry);
break;
}
if (ret) {
upslogx(LOG_DEBUG, "Vendor information unavailable");
}
}
blazer_initbattery();
dstate_setinfo("ups.delay.start", "%d", 60 * ondelay);
dstate_setinfo("ups.delay.shutdown", "%d", offdelay);
dstate_addcmd("beeper.toggle");
dstate_addcmd("load.off");
dstate_addcmd("load.on");
dstate_addcmd("shutdown.return");
dstate_addcmd("shutdown.stayoff");
dstate_addcmd("shutdown.stop");
dstate_addcmd("test.battery.start");
dstate_addcmd("test.battery.start.deep");
dstate_addcmd("test.battery.start.quick");
dstate_addcmd("test.battery.stop");
upsh.instcmd = blazer_instcmd;
}
void upsdrv_updateinfo(void)
{
static int retry = 0;
if (blazer_status(command[proto].status)) {
if (retry < MAXTRIES) {
upsdebugx(1, "Communications with UPS lost: status read failed!");
retry++;
} else if (retry == MAXTRIES) {
upslogx(LOG_WARNING, "Communications with UPS lost: status read failed!");
retry++;
} else {
dstate_datastale();
}
return;
}
if (getval("runtimecal")) {
time_t now;
time(&now);
if (online) { /* OL */
batt.runt.est += batt.runt.nom * difftime(now, lastpoll) / batt.chrg.time;
if (batt.runt.est > batt.runt.nom) {
batt.runt.est = batt.runt.nom;
}
} else { /* OB */
batt.runt.est -= load.eff * difftime(now, lastpoll);
if (batt.runt.est < 0) {
batt.runt.est = 0;
}
}
dstate_setinfo("battery.charge", "%.0f", 100 * batt.runt.est / batt.runt.nom);
dstate_setinfo("battery.runtime", "%.0f", batt.runt.est / load.eff);
lastpoll = now;
}
if (retry > MAXTRIES) {
upslogx(LOG_NOTICE, "Communications with UPS re-established");
}
retry = 0;
dstate_dataok();
}
void upsdrv_shutdown(void)
{
int retry;
/* Stop pending shutdowns */
for (retry = 1; retry <= MAXTRIES; retry++) {
if (blazer_instcmd("shutdown.stop", NULL) != STAT_INSTCMD_HANDLED) {
continue;
}
break;
}
if (retry > MAXTRIES) {
upslogx(LOG_NOTICE, "No shutdown pending");
}
/* Shutdown */
for (retry = 1; retry <= MAXTRIES; retry++) {
if (blazer_instcmd("shutdown.return", NULL) != STAT_INSTCMD_HANDLED) {
continue;
}
fatalx(EXIT_SUCCESS, "Shutting down in %d seconds", offdelay);
}
fatalx(EXIT_FAILURE, "Shutdown failed!");
}