firmware/powermgmt.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 by Heikki Hannikainen
  11  *
  12  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19 #ifndef _POWERMGMT_H_
  20 #define _POWERMGMT_H_
  21
  22 #ifndef SIMULATOR
  23
  24 #define BATTERY_LEVEL_SHUTDOWN   450 /* 4.5V */
  25 #define BATTERY_LEVEL_EMPTY      465 /* 4.65V */
  26 #define BATTERY_LEVEL_DANGEROUS  475 /* 4.75V */
  27 #define BATTERY_LEVEL_FULL       520 /* 5.2V */
  28
  29 #define BATTERY_RANGE (BATTERY_LEVEL_FULL - BATTERY_LEVEL_EMPTY)
  30
  31 #define POWER_HISTORY_LEN 2*60   /* 2 hours of samples, one per minute */
  32 #define POWER_AVG_N       4      /* how many samples to take for each measurement */
  33 #define POWER_AVG_SLEEP   10     /* how long do we sleep between each measurement */
  34
  35 #define CHARGE_END_NEGD   6      /* stop when N minutes have passed with
  36                                   * avg delta being < -0.05 V */
  37 #define CHARGE_END_ZEROD  50     /* stop when N minutes have passed with
  38                                   * avg delta being < 0.005 V */
  39
  40 #ifdef HAVE_CHARGE_CTRL
  41 #define POWER_MESSAGE_LEN 32     /* power thread status message */
  42 #define CHARGE_MAX_TIME   6*60   /* minutes: maximum charging time */
  43 #define CHARGE_MIN_TIME   10     /* minutes: minimum charging time */
  44 #define CHARGE_RESTART_HI 95     /* %: when to restart charging in 'charge' mode */
  45 #define CHARGE_RESTART_LO 10     /* %: when to restart charging in 'discharge' mode */
  46
  47 extern char power_message[POWER_MESSAGE_LEN];
  48 extern char charge_restart_level;
  49 #endif /* HAVE_CHARGE_CTRL */
  50
  51 extern unsigned short power_history[POWER_HISTORY_LEN];
  52
  53 /* Start up power management thread */
  54 void power_init(void);
  55
  56 #endif /* SIMULATOR */
  57
  58 /* Returns battery level in percent */
  59 int battery_level(void);
  60
  61 /* Tells if the battery level is safe for disk writes */
  62 bool battery_level_safe(void);
  63
  64 void set_poweroff_timeout(int timeout);
  65
  66 #endif