firmware/powermgmt.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 by Heikki Hannikainen, Uwe Freese
  11  * Revisions copyright (C) 2005 by Gerald Van Baren
  12  *
  13  * All files in this archive are subject to the GNU General Public License.
  14  * See the file COPYING in the source tree root for full license agreement.
  15  *
  16  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  17  * KIND, either express or implied.
  18  *
  19  ****************************************************************************/
  20 #include "config.h"
  21 #include "cpu.h"
  22 #include "kernel.h"
  23 #include "thread.h"
  24 #include "system.h"
  25 #include "debug.h"
  26 #include "panic.h"
  27 #include "adc.h"
  28 #include "string.h"
  29 #include "sprintf.h"
  30 #include "ata.h"
  31 #include "power.h"
  32 #include "button.h"
  33 #include "audio.h"
  34 #include "mp3_playback.h"
  35 #include "usb.h"
  36 #include "powermgmt.h"
  37 #include "backlight.h"
  38 #include "lcd.h"
  39 #include "rtc.h"
  40 #if CONFIG_TUNER
  41 #include "fmradio.h"
  42 #endif
  43 #include "sound.h"
  44 #ifdef HAVE_LCD_BITMAP
  45 #include "font.h"
  46 #endif
  47 #if defined(HAVE_RECORDING) && (CONFIG_CODEC == SWCODEC)
  48 #include "pcm_record.h"
  49 #endif
  50 #include "logf.h"
  51 #include "lcd-remote.h"
  52 #ifdef SIMULATOR
  53 #include <time.h>
  54 #endif
  55
  56 #if (defined(IAUDIO_X5) || defined(IAUDIO_M5)) && !defined (SIMULATOR)
  57 #include "pcf50606.h"
  58 #include "lcd-remote-target.h"
  59 #endif
  60
  61 /*
  62  * Define DEBUG_FILE to create a csv (spreadsheet) with battery information
  63  * in it (one sample per minute).  This is only for very low level debug.
  64  */
  65 #undef  DEBUG_FILE
  66 #if defined(DEBUG_FILE) && (CONFIG_CHARGING == CHARGING_CONTROL)
  67 #include "file.h"
  68 #define DEBUG_FILE_NAME   "/powermgmt.csv"
  69 #define DEBUG_MESSAGE_LEN 133
  70 static char debug_message[DEBUG_MESSAGE_LEN];
  71 #define DEBUG_STACK ((0x1000)/sizeof(long))
  72 static int fd;          /* write debug information to this file */
  73 static int wrcount;
  74 #else
  75 #define DEBUG_STACK 0
  76 #endif
  77
  78 static int shutdown_timeout = 0;
  79
  80 #ifdef SIMULATOR /***********************************************************/
  81
  82 #define BATT_MINCVOLT   250             /* minimum centivolts of battery */
  83 #define BATT_MAXCVOLT   450             /* maximum centivolts of battery */
  84 #define BATT_MAXRUNTIME (10 * 60)       /* maximum runtime with full battery in minutes */
  85
  86 static unsigned int batt_centivolts = (unsigned int)BATT_MAXCVOLT;
  87 static int batt_level = 100;            /* battery capacity level in percent */
  88 static int batt_time = BATT_MAXRUNTIME; /* estimated remaining time in minutes */
  89 static time_t last_change = 0;
  90
  91 static void battery_status_update(void)
  92 {
  93     time_t          now;
  94
  95     time(&now);
  96     if (last_change < now) {
  97         last_change = now;
  98
  99         /* change the values: */
 100         batt_centivolts -= (unsigned int)(BATT_MAXCVOLT - BATT_MINCVOLT) / 101;
 101         if (batt_centivolts < (unsigned int)BATT_MINCVOLT)
 102             batt_centivolts = (unsigned int)BATT_MAXCVOLT;
 103
 104         batt_level = 100 * (batt_centivolts - BATT_MINCVOLT) / (BATT_MAXCVOLT - BATT_MINCVOLT);
 105         batt_time = batt_level * BATT_MAXRUNTIME / 100;
 106     }
 107 }
 108
 109 void battery_read_info(int *adc, int *voltage, int *level)
 110 {
 111     battery_status_update();
 112
 113     if (adc)
 114         *adc = batt_centivolts; /* just return something */
 115
 116     if (voltage)
 117         *voltage = batt_centivolts;
 118
 119     if (level)
 120         *level = batt_level;
 121 }
 122
 123 unsigned int battery_voltage(void)
 124 {
 125     battery_status_update();
 126     return batt_centivolts;
 127 }
 128
 129 int battery_level(void)
 130 {
 131     battery_status_update();
 132     return batt_level;
 133 }
 134
 135 int battery_time(void)
 136 {
 137     battery_status_update();
 138     return batt_time;
 139 }
 140
 141 bool battery_level_safe(void)
 142 {
 143     return battery_level() >= 10;
 144 }
 145
 146 void set_poweroff_timeout(int timeout)
 147 {
 148     (void)timeout;
 149 }
 150
 151 void set_battery_capacity(int capacity)
 152 {
 153   (void)capacity;
 154 }
 155
 156 void reset_poweroff_timer(void)
 157 {
 158 }
 159
 160
 161 #else /* not SIMULATOR ******************************************************/
 162
 163 static const int poweroff_idle_timeout_value[15] =
 164 {
 165     0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 30, 45, 60
 166 };
 167
 168 static const unsigned int battery_level_dangerous[BATTERY_TYPES_COUNT] =
 169 {
 170 #if CONFIG_BATTERY == BATT_LIION2200    /* FM Recorder, LiIon */
 171     280
 172 #elif CONFIG_BATTERY == BATT_3AAA       /* Ondio: Alkaline, NiHM */
 173     310, 345
 174 #elif CONFIG_BATTERY == BATT_1AA        /* iRiver iFP: Alkaline, NiHM */
 175     105, 115
 176 #elif CONFIG_BATTERY == BATT_LIPOL1300  /* iRiver H1x0: LiPolymer */
 177     338
 178 #elif CONFIG_BATTERY == BATT_LIION300   /* ipod nano */
 179     333
 180 #elif CONFIG_BATTERY == BATT_LIION400   /* iPOD Video 30GB */
 181     345
 182 #elif CONFIG_BATTERY == BATT_LIION750   /* Sansa e200 */
 183     340
 184 #elif CONFIG_BATTERY == BATT_LIION830   /* Gigabeat F */
 185     345
 186 #elif CONFIG_BATTERY == BATT_IAUDIO_X5M5  /* iAudio X5 */
 187     354
 188 #elif CONFIG_BATTERY == BATT_LPCS355385 /* iriver H10 20GB: LiPolymer*/
 189     376
 190 #elif CONFIG_BATTERY == BATT_BP009      /* iriver H10 5/6GB: LiPolymer */
 191     372
 192 #else                                   /* Player/recorder: NiMH */
 193     475
 194 #endif
 195 };
 196
 197 static const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
 198 {
 199 #if   CONFIG_BATTERY == BATT_LIION2200  /* FM Recorder */
 200     258
 201 #elif CONFIG_BATTERY == BATT_3AAA       /* Ondio */
 202     270, 280
 203 #elif CONFIG_BATTERY == BATT_LIPOL1300  /* iRiver Hxxx */
 204     302
 205 #elif CONFIG_BATTERY == BATT_LIION300   /* ipod nano */
 206     323
 207 #elif CONFIG_BATTERY == BATT_LIION400   /* iPOD Video 30GB */
 208     345
 209 #elif CONFIG_BATTERY == BATT_LIION750   /* Sansa e200 */
 210     330
 211 #elif CONFIG_BATTERY == BATT_LIION830   /* Gigabeat F */
 212     340
 213 #elif CONFIG_BATTERY == BATT_IAUDIO_X5M5  /* iAudio X5 */
 214     350
 215 #elif CONFIG_BATTERY == BATT_LPCS355385 /* iriver H10 20GB */
 216     365
 217 #elif CONFIG_BATTERY == BATT_BP009      /* iriver H10 5/6GB */
 218     365
 219 #else                                   /* Player/recorder: NiMH */
 220     440
 221 #endif
 222 };
 223
 224 /* voltages (centivolt) of 0%, 10%, ... 100% when charging disabled */
 225 static const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
 226 {
 227 #if CONFIG_BATTERY == BATT_LIION2200
 228     /* measured values */
 229     { 260, 285, 295, 303, 311, 320, 330, 345, 360, 380, 400 }
 230 #elif CONFIG_BATTERY == BATT_3AAA
 231     /* measured values */
 232     { 280, 325, 341, 353, 364, 374, 385, 395, 409, 427, 475 }, /* Alkaline */
 233     { 310, 355, 363, 369, 372, 374, 376, 378, 380, 386, 405 }  /* NiMH */
 234 #elif CONFIG_BATTERY == BATT_LIPOL1300
 235     /* Below 337 the backlight starts flickering during HD access */
 236     { 337, 365, 370, 374, 378, 382, 387, 393, 400, 408, 416 }
 237 #elif CONFIG_BATTERY == BATT_IAUDIO_X5M5
 238     /* average measured values from X5 and M5L */
 239     { 350, 365, 372, 374, 376, 379, 384, 390, 395, 404, 412 }
 240 #elif CONFIG_BATTERY == BATT_LPCS355385
 241     /* iriver H10 20GB */
 242     { 376, 380, 385, 387, 390, 395, 402, 407, 411, 418, 424 }
 243 #elif CONFIG_BATTERY == BATT_BP009
 244     /* iriver H10 5/6GB */
 245     { 372, 374, 380, 382, 384, 388, 394, 402, 406, 415, 424 }
 246 #elif CONFIG_BATTERY == BATT_1AA
 247     /* These values are the same as for 3AAA divided by 3. */
 248     /* May need recalibration. */
 249     {  93, 108, 114, 118, 121, 125, 128, 132, 136, 142, 158 }, /* alkaline */
 250     { 103, 118, 121, 123, 124, 125, 126, 127, 128, 129, 135 }  /* NiMH */
 251 #elif CONFIG_BATTERY == BATT_LIION830
 252     /* Toshiba Gigabeat Li Ion 830mAH figured from discharge curve */
 253     { 348, 355, 359, 361, 363, 365, 370, 376, 380, 391, 399 },
 254 #elif CONFIG_BATTERY == BATT_LIION750
 255     /* Sansa Li Ion 750mAH FIXME this is a first linear approach */
 256     { 330, 339, 348, 357, 366, 375, 384, 393, 402, 411, 420 },
 257 #elif CONFIG_BATTERY == BATT_LIION400  /* iPOD Video 30GB */
 258     /* iPOD Video 30GB Li-Ion 400mAh, first approach based upon measurements */
 259     { 345, 367, 371, 375, 379, 383, 387, 393, 401, 410, 418 },
 260 #elif CONFIG_BATTERY == BATT_LIION300
 261     /* measured values */
 262     { 323, 362, 370, 373, 375, 378, 383, 389, 395, 403, 416 },
 263 #else /* NiMH */
 264     /* original values were taken directly after charging, but it should show
 265        100% after turning off the device for some hours, too */
 266     { 450, 481, 491, 497, 503, 507, 512, 514, 517, 525, 540 }
 267                                             /* orig. values: ...,528,560 */
 268 #endif
 269 };
 270
 271 #if CONFIG_CHARGING
 272 charger_input_state_type charger_input_state IDATA_ATTR;
 273
 274
 275 /* voltages (centivolt) of 0%, 10%, ... 100% when charging enabled */
 276 static const unsigned short percent_to_volt_charge[11] =
 277 {
 278 #if CONFIG_BATTERY == BATT_LIPOL1300
 279     /* values measured over one full charging cycle */
 280     354, 386, 393, 398, 400, 402, 404, 408, 413, 418, 423 /* LiPo */
 281 #elif CONFIG_BATTERY == BATT_LIION300
 282     /* measured values */
 283     323, 362, 370, 373, 375, 378, 383, 389, 395, 403, 416
 284 #elif CONFIG_BATTERY == BATT_LIION400
 285     /* iPOD Video 30GB Li-Ion 400mAh, first approach based upon measurements */
 286     345, 367, 371, 375, 379, 383, 387, 393, 401, 410, 418
 287 #elif CONFIG_BATTERY == BATT_LIION750
 288     /* Sansa Li Ion 750mAH FIXME*/
 289     330, 339, 348, 357, 366, 375, 384, 393, 402, 411, 420
 290 #elif CONFIG_BATTERY == BATT_LIION830
 291     /* Toshiba Gigabeat Li Ion 830mAH */
 292     348, 355, 359, 361, 363, 365, 370, 376, 380, 391, 399
 293 #elif CONFIG_BATTERY == BATT_LPCS355385
 294     /* iriver H10 20GB */
 295     399, 403, 406, 408, 410, 412, 415, 418, 422, 426, 431
 296 #elif CONFIG_BATTERY == BATT_BP009
 297     /* iriver H10 5/6GB: Not yet calibrated */
 298     388, 392, 396, 400, 406, 410, 415, 419, 424, 428, 433
 299 #else
 300     /* values guessed, see
 301        http://www.seattlerobotics.org/encoder/200210/LiIon2.pdf until someone
 302        measures voltages over a charging cycle */
 303     476, 544, 551, 556, 561, 564, 566, 576, 582, 584, 585 /* NiMH */
 304 #endif
 305 };
 306 #endif /* CONFIG_CHARGING */
 307
 308 #if CONFIG_CHARGING >= CHARGING_MONITOR
 309 charge_state_type charge_state;     /* charging mode */
 310 #endif
 311
 312 #if CONFIG_CHARGING == CHARGING_CONTROL
 313 int long_delta;                     /* long term delta battery voltage */
 314 int short_delta;                    /* short term delta battery voltage */
 315 bool disk_activity_last_cycle = false;         /* flag set to aid charger time
 316                                                 * calculation */
 317 char power_message[POWER_MESSAGE_LEN] = "";    /* message that's shown in
 318                                                   debug menu */
 319                                                /* percentage at which charging
 320                                                   starts */
 321 int powermgmt_last_cycle_startstop_min = 0;    /* how many minutes ago was the
 322                                                   charging started or
 323                                                   stopped? */
 324 int powermgmt_last_cycle_level = 0;            /* which level had the
 325                                                   batteries at this time? */
 326 int trickle_sec = 0;                           /* how many seconds should the
 327                                                   charger be enabled per
 328                                                   minute for trickle
 329                                                   charging? */
 330 int pid_p = 0;                      /* PID proportional term */
 331 int pid_i = 0;                      /* PID integral term */
 332 #endif /* CONFIG_CHARGING == CHARGING_CONTROL */
 333
 334 /*
 335  * Average battery voltage and charger voltage, filtered via a digital
 336  * exponential filter.
 337  */
 338 static unsigned int avgbat;     /* average battery voltage (filtering) */
 339 static unsigned int battery_centivolts;/* filtered battery voltage, centvolts */
 340 #ifdef HAVE_CHARGE_CTRL
 341 #define BATT_AVE_SAMPLES    32  /* filter constant / @ 2Hz sample rate */
 342 #elif CONFIG_BATTERY == BATT_LIPOL1300
 343 #define BATT_AVE_SAMPLES   128  /* slow filter for iriver */
 344 #else
 345 #define BATT_AVE_SAMPLES    64  /* medium filter constant for all others */
 346 #endif
 347
 348 /* battery level (0-100%) of this minute, updated once per minute */
 349 static int battery_percent  = -1;
 350 static int battery_capacity = BATTERY_CAPACITY_DEFAULT; /* default value, mAh */
 351 static int battery_type     = 0;
 352
 353 /* Power history: power_history[0] is the newest sample */
 354 unsigned short power_history[POWER_HISTORY_LEN];
 355
 356 static char power_stack[DEFAULT_STACK_SIZE/2 + DEBUG_STACK];
 357 static const char power_thread_name[] = "power";
 358
 359 static int poweroff_timeout = 0;
 360 static int powermgmt_est_runningtime_min = -1;
 361
 362 static bool sleeptimer_active = false;
 363 static long sleeptimer_endtick;
 364
 365 static long last_event_tick;
 366
 367 static int voltage_to_battery_level(int battery_centivolts);
 368 static void battery_status_update(void);
 369 static int runcurrent(void);
 370
 371 void battery_read_info(int *adc, int *voltage, int *level)
 372 {
 373     int adc_battery = adc_read(ADC_UNREG_POWER);
 374     int centivolts  = adc_battery*BATTERY_SCALE_FACTOR / 10000;
 375
 376     if (adc)
 377         *adc = adc_battery;
 378
 379     if (voltage)
 380         *voltage = centivolts;
 381
 382     if (level)
 383         *level = voltage_to_battery_level(centivolts);
 384 }
 385
 386 void reset_poweroff_timer(void)
 387 {
 388     last_event_tick = current_tick;
 389 }
 390
 391 #if BATTERY_TYPES_COUNT > 1
 392 void set_battery_type(int type)
 393 {
 394     if (type != battery_type) {
 395         battery_type = type;
 396         battery_status_update();     /* recalculate the battery status */
 397     }
 398 }
 399 #endif
 400
 401 void set_battery_capacity(int capacity)
 402 {
 403     battery_capacity = capacity;
 404     if (battery_capacity > BATTERY_CAPACITY_MAX)
 405         battery_capacity = BATTERY_CAPACITY_MAX;
 406     if (battery_capacity < BATTERY_CAPACITY_MIN)
 407         battery_capacity = BATTERY_CAPACITY_MIN;
 408     battery_status_update();     /* recalculate the battery status */
 409 }
 410
 411 int battery_time(void)
 412 {
 413     return powermgmt_est_runningtime_min;
 414 }
 415
 416 /* Returns battery level in percent */
 417 int battery_level(void)
 418 {
 419     return battery_percent;
 420 }
 421
 422 /* Returns filtered battery voltage [centivolts] */
 423 unsigned int battery_voltage(void)
 424 {
 425     return battery_centivolts;
 426 }
 427
 428 /* Returns battery voltage from ADC [centivolts] */
 429 int battery_adc_voltage(void)
 430 {
 431     return (adc_read(ADC_UNREG_POWER) * BATTERY_SCALE_FACTOR + 5000) / 10000;
 432 }
 433
 434 /* Tells if the battery level is safe for disk writes */
 435 bool battery_level_safe(void)
 436 {
 437     return battery_centivolts > battery_level_dangerous[battery_type];
 438 }
 439
 440 void set_poweroff_timeout(int timeout)
 441 {
 442     poweroff_timeout = timeout;
 443 }
 444
 445 void set_sleep_timer(int seconds)
 446 {
 447     if(seconds) {
 448         sleeptimer_active  = true;
 449         sleeptimer_endtick = current_tick + seconds * HZ;
 450     }
 451     else {
 452         sleeptimer_active  = false;
 453         sleeptimer_endtick = 0;
 454     }
 455 }
 456
 457 int get_sleep_timer(void)
 458 {
 459     if(sleeptimer_active)
 460         return (sleeptimer_endtick - current_tick) / HZ;
 461     else
 462         return 0;
 463 }
 464
 465 /* look into the percent_to_volt_* table and get a realistic battery level */
 466 static int voltage_to_percent(int voltage, const short* table)
 467 {
 468     if (voltage <= table[0])
 469         return 0;
 470     else
 471         if (voltage >= table[10])
 472             return 100;
 473         else {
 474             /* search nearest value */
 475             int i = 0;
 476             while ((i < 10) && (table[i+1] < voltage))
 477                 i++;
 478             /* interpolate linear between the smaller and greater value */
 479             return (i * 10) /* Tens digit, 10% per entry */
 480                 + (((voltage - table[i]) * 10)
 481                    / (table[i+1] - table[i])); /* Ones digit: interpolated */
 482         }
 483 }
 484
 485 /* update battery level and estimated runtime, called once per minute or
 486  * when battery capacity / type settings are changed */
 487 static int voltage_to_battery_level(int battery_centivolts)
 488 {
 489     int level;
 490
 491 #if defined(CONFIG_CHARGER) && CONFIG_BATTERY == BATT_LIPOL1300
 492     if (charger_input_state == NO_CHARGER) {
 493         /* discharging. calculate new battery level and average with last */
 494         level = voltage_to_percent(battery_centivolts,
 495                 percent_to_volt_discharge[battery_type]);
 496         if (level != (battery_percent - 1))
 497             level = (level + battery_percent + 1) / 2;
 498     }
 499     else if (charger_input_state == CHARGER_UNPLUGGED) {
 500         /* just unplugged. adjust filtered values */
 501         battery_centivolts -= percent_to_volt_charge[battery_percent/10] -
 502                               percent_to_volt_discharge[0][battery_percent/10];
 503         avgbat = battery_centivolts * 10000 * BATT_AVE_SAMPLES;
 504         level  = battery_percent;
 505     }
 506     else if (charger_input_state == CHARGER_PLUGGED) {
 507         /* just plugged in. adjust battery values */
 508         battery_centivolts += percent_to_volt_charge[battery_percent/10] -
 509                               percent_to_volt_discharge[0][battery_percent/10];
 510         avgbat = battery_centivolts * 10000 * BATT_AVE_SAMPLES;
 511         level  = MIN(12 * battery_percent / 10, 99);
 512     }
 513     else { /* charging. calculate new battery level */
 514         level = voltage_to_percent(battery_centivolts,
 515                 percent_to_volt_charge);
 516     }
 517 #elif CONFIG_CHARGING >= CHARGING_MONITOR
 518     if (charge_state == DISCHARGING) {
 519         level = voltage_to_percent(battery_centivolts,
 520                     percent_to_volt_discharge[battery_type]);
 521     }
 522     else if (charge_state == CHARGING) {
 523         /* battery level is defined to be < 100% until charging is finished */
 524         level = MIN(voltage_to_percent(battery_centivolts,
 525                     percent_to_volt_charge), 99);
 526     }
 527     else { /* in topoff/trickle charge, battery is by definition 100% full */
 528         level = 100;
 529     }
 530 #else
 531     /* always use the discharge table */
 532     level = voltage_to_percent(battery_centivolts,
 533                 percent_to_volt_discharge[battery_type]);
 534 #endif
 535
 536     return level;
 537 }
 538
 539 static void battery_status_update(void)
 540 {
 541     int level = voltage_to_battery_level(battery_centivolts);
 542
 543
 544     /* calculate estimated remaining running time */
 545     /* discharging: remaining running time */
 546     /* charging:    remaining charging time */
 547 #if CONFIG_CHARGING >= CHARGING_MONITOR
 548     if (charge_state == CHARGING) {
 549         powermgmt_est_runningtime_min = (100 - level) * battery_capacity * 60
 550                                       / 100 / (CURRENT_MAX_CHG - runcurrent());
 551     }
 552     else
 553 #elif CONFIG_CHARGING && CONFIG_BATTERY == BATT_LIPOL1300
 554     if (charger_inserted()) {
 555 #ifdef IRIVER_H300_SERIES
 556         /* H300_SERIES use CURRENT_MAX_CHG for basic charge time (80%)
 557          * plus 110 min top off charge time */
 558         powermgmt_est_runningtime_min = ((100-level) * battery_capacity * 80
 559                                          /100 / CURRENT_MAX_CHG) + 110;
 560 #else
 561         /* H100_SERIES scaled for 160 min basic charge time (80%) on
 562          * 1600 mAh battery plus 110 min top off charge time */
 563         powermgmt_est_runningtime_min = ((100 - level) * battery_capacity
 564                                          / 993) + 110;
 565 #endif
 566         level = (level * 80) / 100;
 567         if (level > 72) { /* > 91% */
 568             int i = POWER_HISTORY_LEN;
 569             int d = 1;
 570 #ifdef HAVE_CHARGE_STATE
 571             if (charge_state == DISCHARGING)
 572                 d = -2;
 573 #endif
 574             while ((i > 2) && (d > 0)) /* search zero or neg. delta */
 575                 d = power_history[0] - power_history[--i];
 576             if ((((d == 0) && (i > 6)) || (d == -1)) && (i < 118)) {
 577                 /* top off charging */
 578                 level = MIN(80 + (i*19 / 113), 99);  /* show 81% .. 99% */
 579                 powermgmt_est_runningtime_min = MAX(116 - i, 0);
 580             }
 581             else if ((d < 0) || (i > 117)) {
 582                 /* charging finished */
 583                 level = 100;
 584                 powermgmt_est_runningtime_min = battery_capacity * 60
 585                                                 / runcurrent();
 586             }
 587         }
 588     }
 589     else
 590 #endif /* BATT_LIPOL1300 */
 591     {
 592         if ((battery_centivolts + 2) > percent_to_volt_discharge[0][0])
 593             powermgmt_est_runningtime_min = (level + battery_percent) * 60 *
 594                                          battery_capacity / 200 / runcurrent();
 595         else
 596             powermgmt_est_runningtime_min = (battery_centivolts -
 597                                              battery_level_shutoff[0]) / 2;
 598     }
 599
 600     battery_percent = level;
 601 }
 602
 603 /*
 604  * We shut off in the following cases:
 605  * 1) The unit is idle, not playing music
 606  * 2) The unit is playing music, but is paused
 607  * 3) The battery level has reached shutdown limit
 608  *
 609  * We do not shut off in the following cases:
 610  * 1) The USB is connected
 611  * 2) The charger is connected
 612  * 3) We are recording, or recording with pause
 613  * 4) The radio is playing
 614  */
 615 static void handle_auto_poweroff(void)
 616 {
 617     long timeout = poweroff_idle_timeout_value[poweroff_timeout]*60*HZ;
 618     int  audio_stat = audio_status();
 619
 620 #if CONFIG_CHARGING
 621     /*
 622      * Inhibit shutdown as long as the charger is plugged in.  If it is
 623      * unplugged, wait for a timeout period and then shut down.
 624      */
 625     if(charger_input_state == CHARGER || audio_stat == AUDIO_STATUS_PLAY) {
 626         last_event_tick = current_tick;
 627     }
 628 #endif
 629
 630     /* switch off unit if battery level is too low for reliable operation */
 631 #if (CONFIG_BATTERY!=BATT_4AA_NIMH) && (CONFIG_BATTERY!=BATT_3AAA)&& \
 632     (CONFIG_BATTERY!=BATT_1AA)
 633     if(battery_centivolts < battery_level_shutoff[battery_type]) {
 634         if(!shutdown_timeout) {
 635             backlight_on();
 636             sys_poweroff();
 637         }
 638     }
 639 #endif
 640
 641     if(timeout &&
 642 #if CONFIG_TUNER && !defined(BOOTLOADER)
 643        (!(get_radio_status() & FMRADIO_PLAYING)) &&
 644 #endif
 645        !usb_inserted() &&
 646        ((audio_stat == 0) ||
 647         ((audio_stat == (AUDIO_STATUS_PLAY | AUDIO_STATUS_PAUSE)) &&
 648          !sleeptimer_active)))
 649     {
 650         if(TIME_AFTER(current_tick, last_event_tick    + timeout) &&
 651            TIME_AFTER(current_tick, last_disk_activity + timeout))
 652         {
 653             sys_poweroff();
 654         }
 655     }
 656     else
 657     {
 658         /* Handle sleeptimer */
 659         if(sleeptimer_active && !usb_inserted())
 660         {
 661             if(TIME_AFTER(current_tick, sleeptimer_endtick))
 662             {
 663                 audio_stop();
 664 #if CONFIG_CHARGING && !defined(HAVE_POWEROFF_WHILE_CHARGING)
 665                 if((charger_input_state == CHARGER) ||
 666                    (charger_input_state == CHARGER_PLUGGED))
 667                 {
 668                     DEBUGF("Sleep timer timeout. Stopping...\n");
 669                     set_sleep_timer(0);
 670                     backlight_off(); /* Nighty, nighty... */
 671                 }
 672                 else
 673 #endif
 674                 {
 675                     DEBUGF("Sleep timer timeout. Shutting off...\n");
 676                     sys_poweroff();
 677                 }
 678             }
 679         }
 680     }
 681 }
 682
 683 /*
 684  * Estimate how much current we are drawing just to run.
 685  */
 686 static int runcurrent(void)
 687 {
 688     int current;
 689
 690 #if MEM == 8 && !defined(HAVE_MMC)
 691     /* assuming 192 kbps, the running time is 22% longer with 8MB */
 692     current = (CURRENT_NORMAL*100/122);
 693 #else
 694     current = CURRENT_NORMAL;
 695 #endif /* MEM == 8 */
 696
 697     if(usb_inserted()
 698 #if defined(HAVE_USB_POWER)
 699   #if (CURRENT_USB < CURRENT_NORMAL)
 700        || usb_powered()
 701   #else
 702        && !usb_powered()
 703   #endif
 704 #endif
 705     )
 706     {
 707         current = CURRENT_USB;
 708     }
 709
 710 #if defined(HAVE_BACKLIGHT) && !defined(BOOTLOADER)
 711     if (backlight_get_current_timeout() == 0) /* LED always on */
 712         current += CURRENT_BACKLIGHT;
 713 #endif
 714
 715 #if defined(HAVE_RECORDING) && defined(CURRENT_RECORD)
 716     if (audio_status() & AUDIO_STATUS_RECORD)
 717         current += CURRENT_RECORD;
 718 #endif
 719
 720 #ifdef HAVE_SPDIF_POWER
 721     if (spdif_powered())
 722         current += CURRENT_SPDIF_OUT;
 723 #endif
 724
 725 #ifdef HAVE_REMOTE_LCD
 726     if (remote_detect())
 727         current += CURRENT_REMOTE;
 728 #endif
 729
 730     return(current);
 731 }
 732
 733
 734 /* Check to see whether or not we've received an alarm in the last second */
 735 #ifdef HAVE_RTC_ALARM
 736 static void power_thread_rtc_process(void)
 737 {
 738     if (rtc_check_alarm_flag()) {
 739         rtc_enable_alarm(false);
 740     }
 741 }
 742 #endif
 743
 744 /*
 745  * This function is called to do the relativly long sleep waits from within the
 746  * main power_thread loop while at the same time servicing any other periodic
 747  * functions in the power thread which need to be called at a faster periodic
 748  * rate than the slow periodic rate of the main power_thread loop.
 749  *
 750  * While we are waiting for the time to expire, we average the battery
 751  * voltages.
 752  */
 753 static void power_thread_sleep(int ticks)
 754 {
 755     int small_ticks;
 756
 757     while (ticks > 0) {
 758
 759 #if CONFIG_CHARGING
 760         /*
 761          * Detect charger plugged/unplugged transitions.  On a plugged or
 762          * unplugged event, we return immediately, run once through the main
 763          * loop (including the subroutines), and end up back here where we
 764          * transition to the appropriate steady state charger on/off state.
 765          */
 766         if(charger_inserted()
 767 #ifdef HAVE_USB_POWER /* USB powered or USB inserted both provide power */
 768                 || usb_powered()
 769 #if CONFIG_CHARGING
 770                 || (usb_inserted() && usb_charging_enabled())
 771 #endif
 772 #endif
 773                 ) {
 774             switch(charger_input_state) {
 775                 case NO_CHARGER:
 776                 case CHARGER_UNPLUGGED:
 777                     charger_input_state = CHARGER_PLUGGED;
 778                     return;
 779                 case CHARGER_PLUGGED:
 780                     queue_broadcast(SYS_CHARGER_CONNECTED, 0);
 781                     charger_input_state = CHARGER;
 782                     break;
 783                 case CHARGER:
 784                     break;
 785             }
 786         } else {    /* charger not inserted */
 787             switch(charger_input_state) {
 788                 case NO_CHARGER:
 789                     break;
 790                 case CHARGER_UNPLUGGED:
 791                     queue_broadcast(SYS_CHARGER_DISCONNECTED, 0);
 792                     charger_input_state = NO_CHARGER;
 793                     break;
 794                 case CHARGER_PLUGGED:
 795                 case CHARGER:
 796                     charger_input_state = CHARGER_UNPLUGGED;
 797                     return;
 798             }
 799         }
 800 #endif
 801 #if CONFIG_CHARGING == CHARGING_MONITOR
 802         switch (charger_input_state) {
 803             case CHARGER_UNPLUGGED:
 804             case NO_CHARGER:
 805                 charge_state = DISCHARGING;
 806                 break;
 807             case CHARGER_PLUGGED:
 808             case CHARGER:
 809                 if (charging_state()) {
 810                     charge_state = CHARGING;
 811                 } else {
 812                     charge_state = DISCHARGING;
 813                 }
 814                 break;
 815         }
 816
 817 #endif /* CONFIG_CHARGING == CHARGING_MONITOR */
 818
 819         small_ticks = MIN(HZ/2, ticks);
 820         sleep(small_ticks);
 821         ticks -= small_ticks;
 822
 823         /* If the power off timeout expires, the main thread has failed
 824            to shut down the system, and we need to force a power off */
 825         if(shutdown_timeout) {
 826             shutdown_timeout -= small_ticks;
 827             if(shutdown_timeout <= 0)
 828                 power_off();
 829         }
 830
 831 #ifdef HAVE_RTC_ALARM
 832         power_thread_rtc_process();
 833 #endif
 834
 835         /*
 836          * Do a digital exponential filter.  We don't sample the battery if
 837          * the disk is spinning unless we are in USB mode (the disk will most
 838          * likely always be spinning in USB mode).
 839          */
 840         if (!ata_disk_is_active() || usb_inserted()) {
 841             avgbat += adc_read(ADC_UNREG_POWER) * BATTERY_SCALE_FACTOR
 842                       - (avgbat / BATT_AVE_SAMPLES);
 843             /*
 844              * battery_centivolts is the centivolt-scaled filtered battery value.
 845              */
 846             battery_centivolts = (avgbat / BATT_AVE_SAMPLES + 5000) / 10000;
 847
 848             /* update battery status every time an update is available */
 849             battery_status_update();
 850         }
 851         else if (battery_percent < 8) {
 852             /* If battery is low, observe voltage during disk activity.
 853              * Shut down if voltage drops below shutoff level and we are not
 854              * using NiMH or Alkaline batteries.
 855              */
 856             battery_centivolts = (battery_adc_voltage() +
 857                                   battery_centivolts + 1) / 2;
 858
 859             /* update battery status every time an update is available */
 860             battery_status_update();
 861
 862 #if (CONFIG_BATTERY!=BATT_4AA_NIMH) && (CONFIG_BATTERY!=BATT_3AAA)&& \
 863     (CONFIG_BATTERY!=BATT_1AA)
 864             if (!shutdown_timeout &&
 865                 (battery_centivolts < battery_level_shutoff[battery_type]))
 866                 sys_poweroff();
 867             else
 868 #endif
 869                 avgbat += battery_centivolts * 10000
 870                           - (avgbat / BATT_AVE_SAMPLES);
 871         }
 872
 873 #if CONFIG_CHARGING == CHARGING_CONTROL
 874         if (ata_disk_is_active()) {
 875             /* flag hdd use for charging calculation */
 876             disk_activity_last_cycle = true;
 877         }
 878 #endif
 879 #if defined(DEBUG_FILE) && (CONFIG_CHARGING == CHARGING_CONTROL)
 880         /*
 881          * If we have a lot of pending writes or if the disk is spining,
 882          * fsync the debug log file.
 883          */
 884         if((wrcount > 10) || ((wrcount > 0) && ata_disk_is_active())) {
 885             fsync(fd);
 886             wrcount = 0;
 887         }
 888 #endif
 889     }
 890 }
 891
 892
 893 /*
 894  * This power thread maintains a history of battery voltage
 895  * and implements a charging algorithm.
 896  * For a complete description of the charging algorithm read
 897  * docs/CHARGING_ALGORITHM.
 898  */
 899
 900 static void power_thread(void)
 901 {
 902     int i;
 903     short *phps, *phpd;         /* power history rotation pointers */
 904 #if CONFIG_CHARGING == CHARGING_CONTROL
 905     unsigned int target_voltage = TRICKLE_VOLTAGE;    /* desired topoff/trickle
 906                                        * voltage level */
 907     int charge_max_time_idle = 0;     /* max. charging duration, calculated at
 908                                        * beginning of charging */
 909     int charge_max_time_now = 0;      /* max. charging duration including
 910                                        * hdd activity */
 911     int minutes_disk_activity = 0;    /* count minutes of hdd use during
 912                                        * charging */
 913     int last_disk_activity = CHARGE_END_LONGD + 1; /* last hdd use x mins ago */
 914 #endif
 915
 916     /* initialize the voltages for the exponential filter */
 917     avgbat = adc_read(ADC_UNREG_POWER) * BATTERY_SCALE_FACTOR + 15000;
 918
 919 #ifndef HAVE_MMC  /* this adjustment is only needed for HD based */
 920         /* The battery voltage is usually a little lower directly after
 921            turning on, because the disk was used heavily. Raise it by 5% */
 922 #ifdef HAVE_CHARGING
 923     if(!charger_inserted()) /* only if charger not connected */
 924 #endif
 925         avgbat += (percent_to_volt_discharge[battery_type][6] -
 926                    percent_to_volt_discharge[battery_type][5]) * 5000;
 927 #endif /* not HAVE_MMC */
 928
 929     avgbat = avgbat * BATT_AVE_SAMPLES;
 930     battery_centivolts = avgbat / BATT_AVE_SAMPLES / 10000;
 931
 932 #if CONFIG_CHARGING
 933     if(charger_inserted()) {
 934         battery_percent  = voltage_to_percent(battery_centivolts,
 935                            percent_to_volt_charge);
 936 #if CONFIG_BATTERY == BATT_LIPOL1300
 937         charger_input_state = CHARGER;
 938 #endif
 939     } else
 940 #endif
 941     {   battery_percent  = voltage_to_percent(battery_centivolts,
 942                            percent_to_volt_discharge[battery_type]);
 943         battery_percent += (battery_percent < 100);
 944     }
 945
 946 #if defined(DEBUG_FILE) && (CONFIG_CHARGING == CHARGING_CONTROL)
 947     fd      = -1;
 948     wrcount = 0;
 949 #endif
 950
 951     while (1)
 952     {
 953         /* rotate the power history */
 954         phpd = &power_history[POWER_HISTORY_LEN - 1];
 955         phps = phpd - 1;
 956         for (i = 0; i < POWER_HISTORY_LEN-1; i++)
 957             *phpd-- = *phps--;
 958
 959         /* insert new value at the start, in centivolts 8-) */
 960         power_history[0] = battery_centivolts;
 961
 962 #if CONFIG_CHARGING == CHARGING_CONTROL
 963         if (charger_input_state == CHARGER_PLUGGED) {
 964             pid_p = 0;
 965             pid_i = 0;
 966             snprintf(power_message, POWER_MESSAGE_LEN, "Charger plugged in");
 967             /*
 968              * The charger was just plugged in.  If the battery level is
 969              * nearly charged, just trickle.  If the battery is low, start
 970              * a full charge cycle.  If the battery level is in between,
 971              * top-off and then trickle.
 972              */
 973             if(battery_percent > START_TOPOFF_CHG) {
 974                 powermgmt_last_cycle_level = battery_percent;
 975                 powermgmt_last_cycle_startstop_min = 0;
 976                 if(battery_percent >= START_TRICKLE_CHG) {
 977                     charge_state = TRICKLE;
 978                     target_voltage = TRICKLE_VOLTAGE;
 979                 } else {
 980                     charge_state = TOPOFF;
 981                     target_voltage = TOPOFF_VOLTAGE;
 982                 }
 983             } else {
 984                 /*
 985                  * Start the charger full strength
 986                  */
 987                 i = CHARGE_MAX_TIME_1500 * battery_capacity / 1500;
 988                 charge_max_time_idle =
 989                     i * (100 + 35 - battery_percent) / 100;
 990                 if (charge_max_time_idle > i) {
 991                     charge_max_time_idle = i;
 992                 }
 993                 charge_max_time_now = charge_max_time_idle;
 994
 995                 snprintf(power_message, POWER_MESSAGE_LEN,
 996                          "ChgAt %d%% max %dm", battery_level(),
 997                          charge_max_time_now);
 998
 999                 /* enable the charger after the max time calc is done,
1000                    because battery_level depends on if the charger is
1001                    on */
1002                 DEBUGF("power: charger inserted and battery"
1003                        " not full, charging\n");
1004                 powermgmt_last_cycle_level = battery_percent;
1005                 powermgmt_last_cycle_startstop_min = 0;
1006                 trickle_sec  = 60;
1007                 long_delta   = short_delta = 999999;
1008                 charge_state = CHARGING;
1009             }
1010         }
1011         if (charge_state == CHARGING) {
1012             /* alter charge time max length with extra disk use */
1013             if (disk_activity_last_cycle) {
1014                 minutes_disk_activity++;
1015                 charge_max_time_now = charge_max_time_idle +
1016                                      (minutes_disk_activity * 2 / 5);
1017                 disk_activity_last_cycle = false;
1018                 last_disk_activity = 0;
1019             } else {
1020                 last_disk_activity++;
1021             }
1022             /*
1023              * Check the delta voltage over the last X minutes so we can do
1024              * our end-of-charge logic based on the battery level change.
1025              *(no longer use minimum time as logic for charge end has 50
1026              * minutes minimum charge built in)
1027              */
1028             if (powermgmt_last_cycle_startstop_min > CHARGE_END_SHORTD) {
1029                 short_delta = power_history[0] -
1030                               power_history[CHARGE_END_SHORTD - 1];
1031             }
1032
1033             if (powermgmt_last_cycle_startstop_min > CHARGE_END_LONGD) {
1034             /*
1035              * Scan the history: the points where measurement is taken need to
1036              * be fairly static. (check prior to short delta 'area')
1037              * (also only check first and last 10 cycles - delta in middle OK)
1038              */
1039                 long_delta = power_history[0] -
1040                              power_history[CHARGE_END_LONGD - 1];
1041
1042                 for(i = CHARGE_END_SHORTD; i < CHARGE_END_SHORTD + 10; i++) {
1043                     if(((power_history[i] - power_history[i+1]) >  5) ||
1044                        ((power_history[i] - power_history[i+1]) < -5)) {
1045                         long_delta = 777777;
1046                         break;
1047                     }
1048                 }
1049                  for(i = CHARGE_END_LONGD - 11; i < CHARGE_END_LONGD - 1 ; i++) {
1050                     if(((power_history[i] - power_history[i+1]) >  5) ||
1051                        ((power_history[i] - power_history[i+1]) < -5)) {
1052                         long_delta = 888888;
1053                         break;
1054                     }
1055                 }
1056             }
1057
1058             snprintf(power_message, POWER_MESSAGE_LEN,
1059                      "Chg %dm, max %dm", powermgmt_last_cycle_startstop_min,
1060                      charge_max_time_now);
1061             /*
1062              * End of charge criteria (any qualify):
1063              * 1) Charged a long time
1064              * 2) DeltaV went negative for a short time ( & long delta static)
1065              * 3) DeltaV was negative over a longer period (no disk use only)
1066              * Note: short_delta and long_delta are centivolts
1067              */
1068             if ((powermgmt_last_cycle_startstop_min >= charge_max_time_now) ||
1069                 (short_delta <= -5 && long_delta < 5 ) || (long_delta  < -2 &&
1070                 last_disk_activity > CHARGE_END_LONGD)) {
1071                 if (powermgmt_last_cycle_startstop_min > charge_max_time_now) {
1072                     DEBUGF("power: powermgmt_last_cycle_startstop_min > charge_max_time_now, "
1073                            "enough!\n");
1074                     /*
1075                      *have charged too long and deltaV detection did not
1076                      *work!
1077                      */
1078                      snprintf(power_message, POWER_MESSAGE_LEN,
1079                              "Chg tmout %d min", charge_max_time_now);
1080                     /*
1081                      * Switch to trickle charging.  We skip the top-off
1082                      * since we've effectively done the top-off operation
1083                      * already since we charged for the maximum full
1084                      * charge time.
1085                      */
1086                     powermgmt_last_cycle_level = battery_percent;
1087                     powermgmt_last_cycle_startstop_min = 0;
1088                     charge_state = TRICKLE;
1089
1090                     /*
1091                      * set trickle charge target to a relative voltage instead
1092                      * of an arbitrary value - the fully charged voltage may
1093                      * vary according to ambient temp, battery condition etc
1094                      * trickle target is -0.15v from full voltage acheived
1095                      * topup target is -0.05v from full voltage
1096                      */
1097                     target_voltage = power_history[0] - 15;
1098
1099                 } else {
1100                     if(short_delta <= -5) {
1101                         DEBUGF("power: short-term negative"
1102                                " delta, enough!\n");
1103                         snprintf(power_message, POWER_MESSAGE_LEN,
1104                                  "end negd %d %dmin", short_delta,
1105                                  powermgmt_last_cycle_startstop_min);
1106                         target_voltage = power_history[CHARGE_END_SHORTD - 1]
1107                                          - 5;
1108                     } else {
1109                         DEBUGF("power: long-term small "
1110                                "positive delta, enough!\n");
1111                         snprintf(power_message, POWER_MESSAGE_LEN,
1112                                  "end lowd %d %dmin", long_delta,
1113                                  powermgmt_last_cycle_startstop_min);
1114                         target_voltage = power_history[CHARGE_END_LONGD - 1]
1115                                          - 5;
1116                     }
1117                     /*
1118                      * Switch to top-off charging.
1119                      */
1120                     powermgmt_last_cycle_level = battery_percent;
1121                     powermgmt_last_cycle_startstop_min = 0;
1122                     charge_state = TOPOFF;
1123                 }
1124             }
1125         }
1126         else if (charge_state != DISCHARGING)  /* top off or trickle */
1127         {
1128             /*
1129              *Time to switch from topoff to trickle?
1130              */
1131             if ((charge_state == TOPOFF) &&
1132                 (powermgmt_last_cycle_startstop_min > TOPOFF_MAX_TIME))
1133             {
1134                 powermgmt_last_cycle_level = battery_percent;
1135                 powermgmt_last_cycle_startstop_min = 0;
1136                 charge_state = TRICKLE;
1137                 target_voltage = target_voltage - 10;
1138             }
1139             /*
1140              * Adjust trickle charge time (proportional and integral terms).
1141              * Note: I considered setting the level higher if the USB is
1142              * plugged in, but it doesn't appear to be necessary and will
1143              * generate more heat [gvb].
1144              */
1145
1146             pid_p = target_voltage - battery_centivolts;
1147             if((pid_p > PID_DEADZONE) || (pid_p < -PID_DEADZONE))
1148                 pid_p = pid_p * PID_PCONST;
1149             else
1150                 pid_p = 0;
1151             if((unsigned) battery_centivolts < target_voltage) {
1152                 if(pid_i < 60) {
1153                     pid_i++;        /* limit so it doesn't "wind up" */
1154                 }
1155             } else {
1156                 if(pid_i > 0) {
1157                     pid_i--;        /* limit so it doesn't "wind up" */
1158                 }
1159             }
1160
1161             trickle_sec = pid_p + pid_i;
1162
1163             if(trickle_sec > 60) {
1164                 trickle_sec = 60;
1165             }
1166             if(trickle_sec < 0) {
1167                 trickle_sec = 0;
1168             }
1169
1170         } else if (charge_state == DISCHARGING) {
1171             trickle_sec = 0;
1172             /*
1173              * The charger is enabled here only in one case: if it was
1174              * turned on at boot time (power_init).  Turn it off now.
1175              */
1176             if (charger_enabled)
1177                 charger_enable(false);
1178         }
1179
1180         if (charger_input_state == CHARGER_UNPLUGGED) {
1181             /*
1182              * The charger was just unplugged.
1183              */
1184             DEBUGF("power: charger disconnected, disabling\n");
1185
1186             charger_enable(false);
1187             powermgmt_last_cycle_level = battery_percent;
1188             powermgmt_last_cycle_startstop_min = 0;
1189             trickle_sec  = 0;
1190             pid_p        = 0;
1191             pid_i        = 0;
1192             charge_state = DISCHARGING;
1193             snprintf(power_message, POWER_MESSAGE_LEN, "Charger: discharge");
1194         }
1195
1196 #endif /* CONFIG_CHARGING == CHARGING_CONTROL */
1197
1198         /* sleep for a minute */
1199
1200 #if CONFIG_CHARGING == CHARGING_CONTROL
1201         if(trickle_sec > 0) {
1202             charger_enable(true);
1203             power_thread_sleep(HZ * trickle_sec);
1204         }
1205         if(trickle_sec < 60)
1206             charger_enable(false);
1207         power_thread_sleep(HZ * (60 - trickle_sec));
1208 #else
1209         power_thread_sleep(HZ * 60);
1210 #endif
1211
1212 #if defined(DEBUG_FILE) && (CONFIG_CHARGING == CHARGING_CONTROL)
1213         if(usb_inserted()) {
1214             if(fd >= 0) {
1215                 /* It is probably too late to close the file but we can try...*/
1216                 close(fd);
1217                 fd = -1;
1218             }
1219         } else {
1220             if(fd < 0) {
1221                 fd = open(DEBUG_FILE_NAME, O_WRONLY | O_APPEND | O_CREAT);
1222                 if(fd >= 0) {
1223                     snprintf(debug_message, DEBUG_MESSAGE_LEN,
1224                     "cycle_min, bat_centivolts, bat_percent, chgr_state, charge_state, pid_p, pid_i, trickle_sec\n");
1225                     write(fd, debug_message, strlen(debug_message));
1226                     wrcount = 99;   /* force a flush */
1227                 }
1228             }
1229             if(fd >= 0) {
1230                 snprintf(debug_message, DEBUG_MESSAGE_LEN,
1231                         "%d, %d, %d, %d, %d, %d, %d, %d\n",
1232                     powermgmt_last_cycle_startstop_min, battery_centivolts,
1233                     battery_percent, charger_input_state, charge_state,
1234                     pid_p, pid_i, trickle_sec);
1235                 write(fd, debug_message, strlen(debug_message));
1236                 wrcount++;
1237             }
1238         }
1239 #endif
1240         handle_auto_poweroff();
1241
1242 #if CONFIG_CHARGING == CHARGING_CONTROL
1243         powermgmt_last_cycle_startstop_min++;
1244 #endif
1245     }
1246 }
1247
1248 void powermgmt_init(void)
1249 {
1250     /* init history to 0 */
1251     memset(power_history, 0x00, sizeof(power_history));
1252     create_thread(power_thread, power_stack, sizeof(power_stack),
1253                   power_thread_name IF_PRIO(, PRIORITY_SYSTEM)
1254                   IF_COP(, CPU, false));
1255 }
1256
1257 #endif /* SIMULATOR */
1258
1259 void sys_poweroff(void)
1260 {
1261     logf("sys_poweroff()");
1262     /* If the main thread fails to shut down the system, we will force a
1263        power off after an 20 second timeout - 28 seconds if recording */
1264     if (shutdown_timeout == 0)
1265     {
1266 #if (defined(IAUDIO_X5) || defined(IAUDIO_M5)) && !defined (SIMULATOR)
1267         pcf50606_reset_timeout(); /* Reset timer on first attempt only */
1268 #endif
1269 #ifdef HAVE_RECORDING
1270         if (audio_status() & AUDIO_STATUS_RECORD)
1271             shutdown_timeout += HZ*8;
1272 #endif
1273         shutdown_timeout += HZ*20;
1274     }
1275
1276     queue_post(&button_queue, SYS_POWEROFF, 0);
1277 }
1278
1279 void cancel_shutdown(void)
1280 {
1281     logf("sys_cancel_shutdown()");
1282
1283 #if (defined(IAUDIO_X5) || defined(IAUDIO_M5)) && !defined (SIMULATOR)
1284     /* TODO: Move some things to target/ tree */
1285     if (shutdown_timeout)
1286         pcf50606_reset_timeout();
1287 #endif
1288
1289     shutdown_timeout = 0;
1290 }
1291
1292 /* Various hardware housekeeping tasks relating to shutting down the jukebox */
1293 void shutdown_hw(void)
1294 {
1295 #ifndef SIMULATOR
1296 #if defined(DEBUG_FILE) && (CONFIG_CHARGING == CHARGING_CONTROL)
1297     if(fd >= 0) {
1298         close(fd);
1299         fd = -1;
1300     }
1301 #endif
1302     audio_stop();
1303     if (battery_level_safe()) { /* do not save on critical battery */
1304 #ifdef HAVE_LCD_BITMAP
1305         glyph_cache_save();
1306 #endif
1307         if(ata_disk_is_active())
1308             ata_spindown(1);
1309     }
1310     while(ata_disk_is_active())
1311         sleep(HZ/10);
1312
1313 #if !defined (IAUDIO_X5) && !defined (SANSA_E200)
1314 #if defined(HAVE_BACKLIGHT_PWM_FADING) && !defined(SIMULATOR)
1315     backlight_set_fade_out(0);
1316 #endif
1317     backlight_off();
1318 #endif /* IAUDIO_X5, SANSA_E200 */
1319 #ifdef HAVE_REMOTE_LCD
1320     remote_backlight_off();
1321 #endif
1322
1323 #if CONFIG_CODEC != SWCODEC
1324     mp3_shutdown();
1325 #else
1326     audiohw_close();
1327 #endif
1328
1329     /* If HD is still active we try to wait for spindown, otherwise the
1330        shutdown_timeout in power_thread_sleep will force a power off */
1331     while(ata_disk_is_active())
1332         sleep(HZ/10);
1333 #ifndef IAUDIO_X5
1334     lcd_set_contrast(0);
1335 #endif /* IAUDIO_X5 */
1336 #ifdef HAVE_REMOTE_LCD
1337     lcd_remote_set_contrast(0);
1338 #endif
1339
1340     /* Small delay to make sure all HW gets time to flush. Especially
1341        eeprom chips are quite slow and might be still writing the last
1342        byte. */
1343     sleep(HZ/4);
1344     power_off();
1345 #endif /* #ifndef SIMULATOR */
1346 }