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/*
* blazer_ser.c: support for Megatec/Q1 serial protocol based UPSes
*
* A document describing the protocol implemented by this driver can be
* found online at "http://www.networkupstools.org/protocols/megatec.html".
*
* Copyright (C) 2008 - Arjen de Korte <adkorte-guest@alioth.debian.org>
*
* 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 "serial.h"
#include "blazer.h"
#define DRIVER_NAME "Megatec/Q1 protocol serial driver"
#define DRIVER_VERSION "1.55"
/* driver description structure */
upsdrv_info_t upsdrv_info = {
DRIVER_NAME,
DRIVER_VERSION,
"Arjen de Korte <adkorte-guest@alioth.debian.org>",
DRV_BETA,
{ NULL }
};
#define SER_WAIT_SEC 1 /* 3 seconds for Best UPS */
/*
* Generic command processing function. Send a command and read a reply.
* Returns < 0 on error, 0 on timeout and the number of bytes read on
* success.
*/
int blazer_command(const char *cmd, char *buf, size_t buflen)
{
#ifndef TESTING
int ret;
ser_flush_io(upsfd);
ret = ser_send(upsfd, "%s", cmd);
if (ret <= 0) {
upsdebugx(3, "send: %s", ret ? strerror(errno) : "timeout");
return ret;
}
upsdebugx(3, "send: '%.*s'", (int)strcspn(cmd, "\r"), cmd);
ret = ser_get_buf(upsfd, buf, buflen, SER_WAIT_SEC, 0);
if (ret <= 0) {
upsdebugx(3, "read: %s", ret ? strerror(errno) : "timeout");
return ret;
}
upsdebugx(3, "read: '%.*s'", (int)strcspn(buf, "\r"), buf);
return ret;
#else
const struct {
const char *cmd;
const char *answer;
} testing[] = {
{ "Q1\r", "(215.0 195.0 230.0 014 49.0 2.27 30.0 00101000\r" },
{ "F\r", "#230.0 000 024.0 50.0\r" },
{ "I\r", "#NOT_A_LIVE_UPS TESTING TESTING \r" },
{ NULL }
};
int i;
memset(buf, 0, buflen);
for (i = 0; cmd && testing[i].cmd; i++) {
if (strcasecmp(cmd, testing[i].cmd)) {
continue;
}
return snprintf(buf, buflen, "%s", testing[i].answer);
}
return snprintf(buf, buflen, "%s", testing[i].cmd);
#endif
}
void upsdrv_help(void)
{
printf("Read The Fine Manual ('man 8 blazer')\n");
}
void upsdrv_makevartable(void)
{
addvar(VAR_VALUE, "cablepower", "Set cable power for serial interface");
blazer_makevartable();
}
void upsdrv_initups(void)
{
const struct {
const char *val;
const int dtr;
const int rts;
} cablepower[] = {
{ "normal", 1, 0 }, /* default */
{ "reverse", 0, 1 },
{ "both", 1, 1 },
{ "none", 0, 0 },
{ NULL }
};
int i;
const char *val;
#ifndef TESTING
struct termios tio;
/*
* Open and lock the serial port and set the speed to 2400 baud.
*/
upsfd = ser_open(device_path);
ser_set_speed(upsfd, device_path, B2400);
if (tcgetattr(upsfd, &tio)) {
fatal_with_errno(EXIT_FAILURE, "tcgetattr");
}
/*
* Use canonical mode input processing (to read reply line)
*/
tio.c_lflag |= ICANON; /* Canonical input (erase and kill processing) */
tio.c_cc[VEOF] = _POSIX_VDISABLE;
tio.c_cc[VEOL] = '\r';
tio.c_cc[VERASE] = _POSIX_VDISABLE;
tio.c_cc[VINTR] = _POSIX_VDISABLE;
tio.c_cc[VKILL] = _POSIX_VDISABLE;
tio.c_cc[VQUIT] = _POSIX_VDISABLE;
tio.c_cc[VSUSP] = _POSIX_VDISABLE;
tio.c_cc[VSTART] = _POSIX_VDISABLE;
tio.c_cc[VSTOP] = _POSIX_VDISABLE;
if (tcsetattr(upsfd, TCSANOW, &tio)) {
fatal_with_errno(EXIT_FAILURE, "tcsetattr");
}
val = getval("cablepower");
for (i = 0; val && cablepower[i].val; i++) {
if (!strcasecmp(val, cablepower[i].val)) {
break;
}
}
if (!cablepower[i].val) {
fatalx(EXIT_FAILURE, "Value '%s' not valid for 'cablepower'", val);
}
ser_set_dtr(upsfd, cablepower[i].dtr);
ser_set_rts(upsfd, cablepower[i].rts);
/*
* Allow some time to settle for the cablepower
*/
usleep(100000);
#endif
blazer_initups();
}
void upsdrv_initinfo(void)
{
blazer_initinfo();
}
void upsdrv_cleanup(void)
{
#ifndef TESTING
ser_set_dtr(upsfd, 0);
ser_close(upsfd, device_path);
#endif
}
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