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powerpanel.c

/*
 * powerpanel.c - Model specific routines for CyberPower text/binary
 *                protocol UPSes 
 *
 * Copyright (C)
 *    2007        Doug Reynolds <mav@wastegate.net>
 *    2007-2008   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 "powerp-bin.h"
#include "powerp-txt.h"

static int  mode = 0;

static subdriver_t *subdriver[] = {
      &powpan_binary,
      &powpan_text,
      NULL
};

#define DRIVER_NAME     "CyberPower text/binary protocol UPS driver"
#define DRIVER_VERSION  "0.25"

/* driver description structure */
upsdrv_info_t upsdrv_info = {
      DRIVER_NAME,
      DRIVER_VERSION,
      "Doug Reynolds <mav@wastegate.net>\n" \
      "Arjen de Korte <adkorte-guest@alioth.debian.org>",
      DRV_EXPERIMENTAL,
      { NULL }
};
/* FIXME: add a sub version for binary and text subdrivers? */

void upsdrv_initinfo(void)
{
      char  *s;

      dstate_setinfo("ups.mfr", "CyberPower");
      dstate_setinfo("ups.model", "[unknown]");
      dstate_setinfo("ups.serial", "[unknown]");

      subdriver[mode]->initinfo();

      /*
       * Allow to override the following parameters
       */
      if ((s = getval("manufacturer")) != NULL) {
            dstate_setinfo("ups.mfr", "%s", s);
      }
      if ((s = getval("model")) != NULL) {
            dstate_setinfo("ups.model", "%s", s);
      }
      if ((s = getval("serial")) != NULL) {
            dstate_setinfo("ups.serial", "%s", s);
      }

      upsh.instcmd = subdriver[mode]->instcmd;
      upsh.setvar = subdriver[mode]->setvar;
}

void upsdrv_updateinfo(void)
{
      static int  retry = 0;

      if (subdriver[mode]->updateinfo() < 0) {
            ser_comm_fail("Status read failed!");

            if (retry < 3) {
                  retry++;
            } else {
                  dstate_datastale();
            }

            return;
      }

      retry = 0;

      ser_comm_good();

      dstate_dataok();
}

void upsdrv_shutdown(void)
{
      int   i, ret;

      /*
       * Try to shutdown with delay and automatic reboot if the power
       * returned in the mean time (newer models support this).
       */
      if (subdriver[mode]->instcmd("shutdown.return", NULL) == STAT_INSTCMD_HANDLED) {
            /* Shutdown successful */
            return;
      }

      /*
       * Looks like an older type. Assume we're still on battery if
       * we can't read status or it is telling us we're on battery.
       */
      for (i = 0; i < MAXTRIES; i++) {

            ret = subdriver[mode]->updateinfo();
            if (ret >= 0) {
                  break;
            }
      }

      if (ret) {
            /*
             * When on battery, the 'shutdown.stayoff' command will make
             * the UPS switch back on when the power returns.
             */
            if (subdriver[mode]->instcmd("shutdown.stayoff", NULL) == STAT_INSTCMD_HANDLED) {
                  upslogx(LOG_INFO, "Waiting for power to return...");
                  return;
            }
      } else {
            /*
             * Apparently, the power came back already, so we just need to reboot.
             */
            if (subdriver[mode]->instcmd("shutdown.reboot", NULL) == STAT_INSTCMD_HANDLED) {
                  upslogx(LOG_INFO, "Rebooting now...");
                  return;
            }
      }

      upslogx(LOG_ERR, "Shutdown command failed!");
}

void upsdrv_initups(void)
{
      char  *version;

      version = getval("protocol");
      upsfd = ser_open(device_path);

      ser_set_rts(upsfd, 0);

      /*
       * Try to autodetect which UPS is connected.
       */
      for (mode = 0; subdriver[mode] != NULL; mode++) {

            if ((version != NULL) && strcasecmp(version, subdriver[mode]->version)) {
                  continue;
            }

            ser_set_dtr(upsfd, 1);
            usleep(10000);

            if (subdriver[mode]->initups() > 0) {
                  upslogx(LOG_INFO, "CyberPower UPS with %s protocol on %s detected", subdriver[mode]->version, device_path);
                  return;
            }

            ser_set_dtr(upsfd, 0);
            usleep(10000);
      }

      fatalx(EXIT_FAILURE, "CyberPower UPS not found on %s", device_path);
}

void upsdrv_help(void)
{
}

void upsdrv_makevartable(void)
{
      addvar(VAR_VALUE, "ondelay", "Delay before UPS startup");
      addvar(VAR_VALUE, "offdelay", "Delay before UPS shutdown");

      addvar(VAR_VALUE, "manufacturer", "manufacturer");
      addvar(VAR_VALUE, "model", "modelname");
      addvar(VAR_VALUE, "serial", "serialnumber");
      addvar(VAR_VALUE, "protocol", "protocol to use [text|binary] (default: autodection)");
}

void upsdrv_cleanup(void)
{
      ser_set_dtr(upsfd, 0);
      ser_close(upsfd, device_path);
}

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