lib/dvb/dvbtime.cpp

   1 #include <lib/dvb/dvbtime.h>
   2 #include <lib/dvb/dvb.h>
   3
   4 #include <sys/ioctl.h>
   5 #include <stdio.h>
   6 #include <sys/types.h>
   7 #include <sys/stat.h>
   8 #include <fcntl.h>
   9
  10 // defines for DM7000 / DM7020
  11 #define FP_IOCTL_SET_RTC         0x101
  12 #define FP_IOCTL_GET_RTC         0x102
  13
  14 static time_t prev_time;
  15
  16 void setRTC(time_t time)
  17 {
  18         int fd = open("/dev/dbox/fp0", O_RDWR);
  19         if ( fd >= 0 )
  20         {
  21                 if ( ::ioctl(fd, FP_IOCTL_SET_RTC, (void*)&time ) < 0 )
  22                         eDebug("FP_IOCTL_SET_RTC failed(%m)");
  23                 else
  24                         prev_time = time;
  25                 close(fd);
  26         }
  27 }
  28
  29 time_t getRTC()
  30 {
  31         time_t rtc_time=0;
  32         int fd = open("/dev/dbox/fp0", O_RDWR);
  33         if ( fd >= 0 )
  34         {
  35                 if ( ::ioctl(fd, FP_IOCTL_GET_RTC, (void*)&rtc_time ) < 0 )
  36                         eDebug("FP_IOCTL_GET_RTC failed(%m)");
  37                 close(fd);
  38         }
  39         return rtc_time != prev_time ? rtc_time : 0;
  40 }
  41
  42 time_t parseDVBtime(__u8 t1, __u8 t2, __u8 t3, __u8 t4, __u8 t5)
  43 {
  44         tm t;
  45         t.tm_sec=fromBCD(t5);
  46         t.tm_min=fromBCD(t4);
  47         t.tm_hour=fromBCD(t3);
  48         int mjd=(t1<<8)|t2;
  49         int k;
  50
  51         t.tm_year = (int) ((mjd - 15078.2) / 365.25);
  52         t.tm_mon = (int) ((mjd - 14956.1 - (int)(t.tm_year * 365.25)) / 30.6001);
  53         t.tm_mday = (int) (mjd - 14956 - (int)(t.tm_year * 365.25) - (int)(t.tm_mon * 30.6001));
  54         k = (t.tm_mon == 14 || t.tm_mon == 15) ? 1 : 0;
  55         t.tm_year = t.tm_year + k;
  56         t.tm_mon = t.tm_mon - 1 - k * 12;
  57         t.tm_mon--;
  58
  59         t.tm_isdst =  0;
  60         t.tm_gmtoff = 0;
  61
  62         return timegm(&t);
  63 }
  64
  65 TDT::TDT(eDVBChannel *chan, int update_count)
  66         :chan(chan), update_count(update_count)
  67 {
  68         CONNECT(tableReady, TDT::ready);
  69         CONNECT(m_interval_timer.timeout, TDT::start);
  70         if (chan)
  71                 chan->getDemux(demux, 0);
  72 }
  73
  74 void TDT::ready(int error)
  75 {
  76         eDVBLocalTimeHandler::getInstance()->updateTime(error, chan, ++update_count);
  77 }
  78
  79 int TDT::createTable(unsigned int nr, const __u8 *data, unsigned int max)
  80 {
  81         if ( data && data[0] == 0x70 || data[0] == 0x73 )
  82         {
  83                 int length = ((data[1] & 0x0F) << 8) | data[2];
  84                 if ( length >= 5 )
  85                 {
  86                         time_t tptime = parseDVBtime(data[3], data[4], data[5], data[6], data[7]);
  87                         if (tptime && tptime != -1)
  88                                 eDVBLocalTimeHandler::getInstance()->updateTime(tptime, chan, update_count);
  89                         error=0;
  90                         return 1;
  91                 }
  92         }
  93         return 0;
  94 }
  95
  96 void TDT::start()
  97 {
  98         if ( chan )
  99         {
 100                 eDVBTableSpec spec;
 101                 spec.pid = TimeAndDateSection::PID;
 102                 spec.tid = TimeAndDateSection::TID;
 103                 spec.tid_mask = 0xFC;
 104                 spec.timeout = TimeAndDateSection::TIMEOUT;
 105                 spec.flags= eDVBTableSpec::tfAnyVersion |
 106                                         eDVBTableSpec::tfHaveTID |
 107                                         eDVBTableSpec::tfHaveTIDMask |
 108                                         eDVBTableSpec::tfHaveTimeout;
 109                 if ( demux )
 110                         eGTable::start( demux, spec );
 111         }
 112 }
 113
 114 void TDT::startTimer( int interval )
 115 {
 116         m_interval_timer.start(interval, true);
 117 }
 118
 119 eDVBLocalTimeHandler *eDVBLocalTimeHandler::instance;
 120 DEFINE_REF(eDVBLocalTimeHandler);
 121
 122 eDVBLocalTimeHandler::eDVBLocalTimeHandler()
 123         :m_time_ready(false)
 124 {
 125         if ( !instance )
 126                 instance=this;
 127         ePtr<eDVBResourceManager> res_mgr;
 128         eDVBResourceManager::getInstance(res_mgr);
 129         if (!res_mgr)
 130                 eDebug("[eDVBLocalTimerHandler] no resource manager !!!!!!!");
 131         else
 132         {
 133                 res_mgr->connectChannelAdded(slot(*this,&eDVBLocalTimeHandler::DVBChannelAdded), m_chanAddedConn);
 134                 time_t now = time(0);
 135                 if ( now < 1072224000 ) // 01.01.2004
 136                         eDebug("RTC not ready... wait for transponder time");
 137                 else // inform all who's waiting for valid system time..
 138                 {
 139                         eDebug("Use valid Linux Time :) (RTC?)");
 140                         m_time_ready = true;
 141                         /*emit*/ m_timeUpdated();
 142                 }
 143         }
 144 }
 145
 146 eDVBLocalTimeHandler::~eDVBLocalTimeHandler()
 147 {
 148         instance=0;
 149         for (std::map<iDVBChannel*, channel_data>::iterator it=m_knownChannels.begin(); it != m_knownChannels.end(); ++it)
 150                 delete it->second.tdt;
 151         if (ready())
 152         {
 153                 eDebug("set RTC to previous valid time");
 154                 setRTC(::time(0));
 155         }
 156 }
 157
 158 void eDVBLocalTimeHandler::readTimeOffsetData( const char* filename )
 159 {
 160         m_timeOffsetMap.clear();
 161         FILE *f=fopen(filename, "r");
 162         if (!f)
 163                 return;
 164         char line[256];
 165         fgets(line, 256, f);
 166         while (true)
 167         {
 168                 if (!fgets( line, 256, f ))
 169                         break;
 170                 if (strstr(line, "Transponder UTC Time Offsets\n"))
 171                         continue;
 172                 int dvbnamespace,tsid,onid,offs;
 173                 if ( sscanf( line, "%08x,%04x,%04x:%d\n",&dvbnamespace,&tsid,&onid,&offs ) == 4 )
 174                         m_timeOffsetMap[eDVBChannelID(dvbnamespace,tsid,onid)]=offs;
 175         }
 176         fclose(f);
 177 }
 178
 179 void eDVBLocalTimeHandler::writeTimeOffsetData( const char* filename )
 180 {
 181         FILE *f=fopen(filename, "w+");
 182         if ( f )
 183         {
 184                 fprintf(f, "Transponder UTC Time Offsets\n");
 185                 for ( std::map<eDVBChannelID,int>::iterator it ( m_timeOffsetMap.begin() ); it != m_timeOffsetMap.end(); ++it )
 186                         fprintf(f, "%08x,%04x,%04x:%d\n",
 187                                 it->first.dvbnamespace.get(),
 188                                 it->first.transport_stream_id.get(), it->first.original_network_id.get(), it->second );
 189                 fclose(f);
 190         }
 191 }
 192
 193 void eDVBLocalTimeHandler::updateTime( time_t tp_time, eDVBChannel *chan, int update_count )
 194 {
 195         int time_difference;
 196         bool restart_tdt = false;
 197         if (!tp_time)
 198                 restart_tdt = true;
 199         else if (tp_time == -1)
 200         {
 201                 restart_tdt = true;
 202                 /*if ( eSystemInfo::getInstance()->getHwType() == eSystemInfo::DM7020 ||
 203                 ( eSystemInfo::getInstance()->getHwType() == eSystemInfo::DM7000
 204                         && eSystemInfo::getInstance()->hasStandbyWakeupTimer() ) )     TODO !!!!!!! */
 205                 {
 206                         eDebug("[eDVBLocalTimerHandler] no transponder tuned... or no TDT/TOT avail .. try to use RTC :)");
 207                         time_t rtc_time = getRTC();
 208                         if ( rtc_time ) // RTC Ready?
 209                         {
 210                                 tm now;
 211                                 localtime_r(&rtc_time, &now);
 212                                 eDebug("[eDVBLocalTimerHandler] RTC time is %02d:%02d:%02d",
 213                                         now.tm_hour,
 214                                         now.tm_min,
 215                                         now.tm_sec);
 216                                 time_t linuxTime=time(0);
 217                                 localtime_r(&linuxTime, &now);
 218                                 eDebug("[eDVBLocalTimerHandler] Receiver time is %02d:%02d:%02d",
 219                                         now.tm_hour,
 220                                         now.tm_min,
 221                                         now.tm_sec);
 222                                 time_difference = rtc_time - linuxTime;
 223                                 eDebug("[eDVBLocalTimerHandler] RTC to Receiver time difference is %ld seconds", linuxTime - rtc_time );
 224                                 if ( time_difference )
 225                                 {
 226                                         eDebug("[eDVBLocalTimerHandler] set Linux Time to RTC Time");
 227                                         timeval tnow;
 228                                         gettimeofday(&tnow,0);
 229                                         tnow.tv_sec=rtc_time;
 230                                         settimeofday(&tnow,0);
 231                                 }
 232                                 else if ( !time_difference )
 233                                         eDebug("[eDVBLocalTimerHandler] no change needed");
 234                                 else
 235                                         eDebug("[eDVBLocalTimerHandler] set to RTC time");
 236                                 /*emit*/ m_timeUpdated();
 237                         }
 238                         else
 239                                 eDebug("[eDVBLocalTimerHandler] shit RTC not ready :(");
 240                 }
 241         }
 242         else
 243         {
 244                 std::map< eDVBChannelID, int >::iterator it( m_timeOffsetMap.find( chan->getChannelID() ) );
 245
 246  // current linux time
 247                 time_t linuxTime = time(0);
 248
 249         // difference between current enigma time and transponder time
 250                 int enigma_diff = tp_time-linuxTime;
 251
 252                 int new_diff=0;
 253
 254                 bool updated = m_time_ready;
 255
 256                 if ( m_time_ready )  // ref time ready?
 257                 {
 258                         // difference between reference time (current enigma time)
 259                         // and the transponder time
 260                         eDebug("[eDVBLocalTimerHandler] diff is %d", enigma_diff);
 261                         if ( abs(enigma_diff) < 120 )
 262                         {
 263                                 eDebug("[eDVBLocalTimerHandler] diff < 120 .. use Transponder Time");
 264                                 m_timeOffsetMap[chan->getChannelID()] = 0;
 265                                 new_diff = enigma_diff;
 266                         }
 267                         else if ( it != m_timeOffsetMap.end() ) // correction saved?
 268                         {
 269                                 eDebug("[eDVBLocalTimerHandler] we have correction %d", it->second);
 270                                 time_t CorrectedTpTime = tp_time+it->second;
 271                                 int ddiff = CorrectedTpTime-linuxTime;
 272                                 eDebug("[eDVBLocalTimerHandler] diff after add correction is %d", ddiff);
 273                                 if ( abs(it->second) < 300 ) // stored correction < 5 min
 274                                 {
 275                                         eDebug("[eDVBLocalTimerHandler] use stored correction(<5 min)");
 276                                         new_diff = ddiff;
 277                                 }
 278                                 else if ( getRTC() )
 279                                 {
 280                                         time_t rtc=getRTC();
 281                                         m_timeOffsetMap[chan->getChannelID()] = rtc-tp_time;
 282                                         new_diff = rtc-linuxTime;  // set enigma time to rtc
 283                                         eDebug("[eDVBLocalTimerHandler] update stored correction to %ld (calced against RTC time)", rtc-tp_time );
 284                                 }
 285                                 else if ( abs(ddiff) <= 120 )
 286                                 {
 287 // with stored correction calced time difference is lower 2 min
 288 // this don't help when a transponder have a clock running to slow or to fast
 289 // then its better to have a DM7020 with always running RTC
 290                                         eDebug("[eDVBLocalTimerHandler] use stored correction(corr < 2 min)");
 291                                         new_diff = ddiff;
 292                                 }
 293                                 else  // big change in calced correction.. hold current time and update correction
 294                                 {
 295                                         eDebug("[eDVBLocalTimerHandler] update stored correction to %d", -enigma_diff);
 296                                         m_timeOffsetMap[chan->getChannelID()] = -enigma_diff;
 297                                 }
 298                         }
 299                         else
 300                         {
 301                                 eDebug("[eDVBLocalTimerHandler] no correction found... store calced correction(%d)",-enigma_diff);
 302                                 m_timeOffsetMap[chan->getChannelID()] = -enigma_diff;
 303                         }
 304                 }
 305                 else  // no time setted yet
 306                 {
 307                         if ( it != m_timeOffsetMap.end() )
 308                         {
 309                                 enigma_diff += it->second;
 310                                 eDebug("[eDVBLocalTimerHandler] we have correction (%d)... use", it->second );
 311                         }
 312                         else
 313                                 eDebug("[eDVBLocalTimerHandler] dont have correction.. set Transponder Diff");
 314                         new_diff=enigma_diff;
 315                         m_time_ready=true;
 316                 }
 317
 318                 time_t t = linuxTime+new_diff;
 319                 m_last_tp_time_difference=tp_time-t;
 320
 321                 if (!new_diff &&
 322                         updated) // overrride this check on first received TDT
 323                 {
 324                         eDebug("[eDVBLocalTimerHandler] not changed");
 325                         return;
 326                 }
 327
 328                 if ( !update_count )
 329                 {
 330                         // set rtc to calced transponder time when the first tdt is received on this
 331                         // transponder
 332                         setRTC(t);
 333                         eDebug("[eDVBLocalTimerHandler] update RTC");
 334                 }
 335                 else if (getRTC())
 336                 {
 337                         if (abs(getRTC() - t) > 60)
 338                         {
 339                                 eDebug("[eDVBLocalTimerHandler] difference between new linux time and RTC time is > 60 sec... transponder time looks not ok... use rtc time");
 340                                 t = getRTC();
 341                         }
 342                         else
 343                                 eDebug("[eDVBLocalTimerHandler] difference between linux time and RTC time is < 60 sec... so the transponder time looks ok");
 344                 }
 345                 else
 346                         eDebug("[eDVBLocalTimerHandler] no RTC available :(");
 347
 348                 tm now;
 349                 localtime_r(&t, &now);
 350                 eDebug("[eDVBLocalTimerHandler] time update to %02d:%02d:%02d",
 351                         now.tm_hour,
 352                         now.tm_min,
 353                         now.tm_sec);
 354
 355                 time_difference = t - linuxTime;   // calc our new linux_time -> enigma_time correction
 356                 eDebug("[eDVBLocalTimerHandler] m_time_difference is %d", time_difference );
 357
 358                 if ( time_difference )
 359                 {
 360                         eDebug("[eDVBLocalTimerHandler] set Linux Time");
 361                         timeval tnow;
 362                         gettimeofday(&tnow,0);
 363                         tnow.tv_sec=t;
 364                         settimeofday(&tnow,0);
 365                 }
 366
 367                  /*emit*/ m_timeUpdated();
 368         }
 369
 370         if ( restart_tdt )
 371         {
 372                 std::map<iDVBChannel*, channel_data>::iterator it =
 373                         m_knownChannels.find(chan);
 374                 if ( it != m_knownChannels.end() )
 375                 {
 376                         TDT *prev_tdt = it->second.tdt;
 377                         it->second.tdt = new TDT(chan, prev_tdt->getUpdateCount());
 378                         it->second.tdt->startTimer(60*60*1000);  // restart TDT for this transponder in 60min
 379                         delete prev_tdt;
 380                 }
 381         }
 382 }
 383
 384 void eDVBLocalTimeHandler::DVBChannelAdded(eDVBChannel *chan)
 385 {
 386         if ( chan )
 387         {
 388 //              eDebug("[eDVBLocalTimerHandler] add channel %p", chan);
 389                 std::pair<std::map<iDVBChannel*, channel_data>::iterator, bool> tmp =
 390                         m_knownChannels.insert( std::pair<iDVBChannel*, channel_data>(chan, channel_data()) );
 391                 tmp.first->second.tdt = NULL;
 392                 tmp.first->second.channel = chan;
 393                 tmp.first->second.m_prevChannelState = -1;
 394                 chan->connectStateChange(slot(*this, &eDVBLocalTimeHandler::DVBChannelStateChanged), tmp.first->second.m_stateChangedConn);
 395         }
 396 }
 397
 398 void eDVBLocalTimeHandler::DVBChannelStateChanged(iDVBChannel *chan)
 399 {
 400         std::map<iDVBChannel*, channel_data>::iterator it =
 401                 m_knownChannels.find(chan);
 402         if ( it != m_knownChannels.end() )
 403         {
 404                 int state=0;
 405                 chan->getState(state);
 406                 if ( state != it->second.m_prevChannelState )
 407                 {
 408                         switch (state)
 409                         {
 410                                 case iDVBChannel::state_ok:
 411                                         eDebug("[eDVBLocalTimerHandler] channel %p running", chan);
 412                                         it->second.tdt = new TDT(it->second.channel);
 413                                         it->second.tdt->start();
 414                                         break;
 415                                 case iDVBChannel::state_release:
 416                                         eDebug("[eDVBLocalTimerHandler] remove channel %p", chan);
 417                                         delete it->second.tdt;
 418                                         m_knownChannels.erase(it);
 419                                         break;
 420                                 default: // ignore all other events
 421                                         return;
 422                         }
 423                         it->second.m_prevChannelState = state;
 424                 }
 425         }
 426 }