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 #define TIME_UPDATE_INTERVAL (30*60*1000)
  15
  16 static time_t prev_time;
  17
  18 void setRTC(time_t time)
  19 {
  20         FILE *f = fopen("/proc/stb/fp/rtc", "w");
  21         if (f)
  22         {
  23                 if (fprintf(f, "%u", (unsigned int)time))
  24                         prev_time = time;
  25                 else
  26                         eDebug("write /proc/stb/fp/rtc failed (%m)");
  27                 fclose(f);
  28         }
  29         else
  30         {
  31                 int fd = open("/dev/dbox/fp0", O_RDWR);
  32                 if ( fd >= 0 )
  33                 {
  34                         if ( ::ioctl(fd, FP_IOCTL_SET_RTC, (void*)&time ) < 0 )
  35                                 eDebug("FP_IOCTL_SET_RTC failed(%m)");
  36                         else
  37                                 prev_time = time;
  38                         close(fd);
  39                 }
  40         }
  41 }
  42
  43 time_t getRTC()
  44 {
  45         time_t rtc_time=0;
  46         FILE *f = fopen("/proc/stb/fp/rtc", "r");
  47         if (f)
  48         {
  49                 // sanity check to detect corrupt atmel firmware
  50                 unsigned int tmp;
  51                 if (fscanf(f, "%u", &tmp) != 1)
  52                         eDebug("read /proc/stb/fp/rtc failed (%m)");
  53                 else
  54                         rtc_time=tmp;
  55                 fclose(f);
  56         }
  57         else
  58         {
  59                 int fd = open("/dev/dbox/fp0", O_RDWR);
  60                 if ( fd >= 0 )
  61                 {
  62                         if ( ::ioctl(fd, FP_IOCTL_GET_RTC, (void*)&rtc_time ) < 0 )
  63                                 eDebug("FP_IOCTL_GET_RTC failed(%m)");
  64                         close(fd);
  65                 }
  66         }
  67         return rtc_time != prev_time ? rtc_time : 0;
  68 }
  69
  70 time_t parseDVBtime(__u8 t1, __u8 t2, __u8 t3, __u8 t4, __u8 t5)
  71 {
  72         tm t;
  73         t.tm_sec=fromBCD(t5);
  74         t.tm_min=fromBCD(t4);
  75         t.tm_hour=fromBCD(t3);
  76         int mjd=(t1<<8)|t2;
  77         int k;
  78
  79         t.tm_year = (int) ((mjd - 15078.2) / 365.25);
  80         t.tm_mon = (int) ((mjd - 14956.1 - (int)(t.tm_year * 365.25)) / 30.6001);
  81         t.tm_mday = (int) (mjd - 14956 - (int)(t.tm_year * 365.25) - (int)(t.tm_mon * 30.6001));
  82         k = (t.tm_mon == 14 || t.tm_mon == 15) ? 1 : 0;
  83         t.tm_year = t.tm_year + k;
  84         t.tm_mon = t.tm_mon - 1 - k * 12;
  85         t.tm_mon--;
  86
  87         t.tm_isdst =  0;
  88         t.tm_gmtoff = 0;
  89
  90         return timegm(&t);
  91 }
  92
  93 TDT::TDT(eDVBChannel *chan, int update_count)
  94         :chan(chan), m_interval_timer(eTimer::create()), update_count(update_count)
  95 {
  96         CONNECT(tableReady, TDT::ready);
  97         CONNECT(m_interval_timer->timeout, TDT::start);
  98         if (chan)
  99                 chan->getDemux(demux, 0);
 100 }
 101
 102 void TDT::ready(int error)
 103 {
 104         eDVBLocalTimeHandler::getInstance()->updateTime(error, chan, ++update_count);
 105 }
 106
 107 int TDT::createTable(unsigned int nr, const __u8 *data, unsigned int max)
 108 {
 109         if ( data && data[0] == 0x70 || data[0] == 0x73 )
 110         {
 111                 int length = ((data[1] & 0x0F) << 8) | data[2];
 112                 if ( length >= 5 )
 113                 {
 114                         time_t tptime = parseDVBtime(data[3], data[4], data[5], data[6], data[7]);
 115                         if (tptime && tptime != -1)
 116                                 eDVBLocalTimeHandler::getInstance()->updateTime(tptime, chan, update_count);
 117                         error=0;
 118                         return 1;
 119                 }
 120         }
 121         return 0;
 122 }
 123
 124 void TDT::start()
 125 {
 126         if ( chan )
 127         {
 128                 eDVBTableSpec spec;
 129                 spec.pid = TimeAndDateSection::PID;
 130                 spec.tid = TimeAndDateSection::TID;
 131                 spec.tid_mask = 0xFC;
 132                 spec.timeout = TimeAndDateSection::TIMEOUT;
 133                 spec.flags= eDVBTableSpec::tfAnyVersion |
 134                                         eDVBTableSpec::tfHaveTID |
 135                                         eDVBTableSpec::tfHaveTIDMask |
 136                                         eDVBTableSpec::tfHaveTimeout;
 137                 if ( demux )
 138                         eGTable::start( demux, spec );
 139         }
 140 }
 141
 142 void TDT::startTimer( int interval )
 143 {
 144         m_interval_timer->start(interval, true);
 145 }
 146
 147 eDVBLocalTimeHandler *eDVBLocalTimeHandler::instance;
 148 DEFINE_REF(eDVBLocalTimeHandler);
 149
 150 eDVBLocalTimeHandler::eDVBLocalTimeHandler()
 151         :m_use_dvb_time(false), m_updateNonTunedTimer(eTimer::create(eApp)), m_time_ready(false)
 152 {
 153         if ( !instance )
 154                 instance=this;
 155         ePtr<eDVBResourceManager> res_mgr;
 156         eDVBResourceManager::getInstance(res_mgr);
 157         if (!res_mgr)
 158                 eDebug("[eDVBLocalTimerHandler] no resource manager !!!!!!!");
 159         else
 160         {
 161                 res_mgr->connectChannelAdded(slot(*this,&eDVBLocalTimeHandler::DVBChannelAdded), m_chanAddedConn);
 162                 time_t now = time(0);
 163                 if ( now < 1072224000 ) // 01.01.2004
 164                         eDebug("RTC not ready... wait for transponder time");
 165                 else // inform all who's waiting for valid system time..
 166                 {
 167                         eDebug("Use valid Linux Time :) (RTC?)");
 168                         m_time_ready = true;
 169                         /*emit*/ m_timeUpdated();
 170                 }
 171         }
 172         CONNECT(m_updateNonTunedTimer->timeout, eDVBLocalTimeHandler::updateNonTuned);
 173 }
 174
 175 eDVBLocalTimeHandler::~eDVBLocalTimeHandler()
 176 {
 177         instance=0;
 178         if (ready())
 179         {
 180                 eDebug("set RTC to previous valid time");
 181                 setRTC(::time(0));
 182         }
 183 }
 184
 185 void eDVBLocalTimeHandler::readTimeOffsetData( const char* filename )
 186 {
 187         m_timeOffsetMap.clear();
 188         FILE *f=fopen(filename, "r");
 189         if (!f)
 190                 return;
 191         char line[256];
 192         fgets(line, 256, f);
 193         while (true)
 194         {
 195                 if (!fgets( line, 256, f ))
 196                         break;
 197                 if (strstr(line, "Transponder UTC Time Offsets\n"))
 198                         continue;
 199                 int dvbnamespace,tsid,onid,offs;
 200                 if ( sscanf( line, "%08x,%04x,%04x:%d\n",&dvbnamespace,&tsid,&onid,&offs ) == 4 )
 201                         m_timeOffsetMap[eDVBChannelID(dvbnamespace,tsid,onid)]=offs;
 202         }
 203         fclose(f);
 204 }
 205
 206 void eDVBLocalTimeHandler::writeTimeOffsetData( const char* filename )
 207 {
 208         FILE *f=fopen(filename, "w+");
 209         if ( f )
 210         {
 211                 fprintf(f, "Transponder UTC Time Offsets\n");
 212                 for ( std::map<eDVBChannelID,int>::iterator it ( m_timeOffsetMap.begin() ); it != m_timeOffsetMap.end(); ++it )
 213                         fprintf(f, "%08x,%04x,%04x:%d\n",
 214                                 it->first.dvbnamespace.get(),
 215                                 it->first.transport_stream_id.get(), it->first.original_network_id.get(), it->second );
 216                 fclose(f);
 217         }
 218 }
 219
 220 void eDVBLocalTimeHandler::setUseDVBTime(bool b)
 221 {
 222         if (m_use_dvb_time != b) {
 223                 if (m_use_dvb_time) {
 224                         eDebug("[eDVBLocalTimeHandler] disable sync local time with transponder time!");
 225                         std::map<iDVBChannel*, channel_data>::iterator it =
 226                                 m_knownChannels.begin();
 227                         for (; it != m_knownChannels.end(); ++it) {
 228                                 if (it->second.m_prevChannelState == iDVBChannel::state_ok)
 229                                         it->second.tdt = 0;
 230                         }
 231                 }
 232                 else {
 233                         eDebug("[eDVBLocalTimeHandler] enable sync local time with transponder time!");
 234                         std::map<iDVBChannel*, channel_data>::iterator it =
 235                                 m_knownChannels.begin();
 236                         for (; it != m_knownChannels.end(); ++it) {
 237                                 if (it->second.m_prevChannelState == iDVBChannel::state_ok) {
 238                                         it->second.tdt = new TDT(it->second.channel);
 239                                         it->second.tdt->start();
 240                                 }
 241                         }
 242                 }
 243                 m_use_dvb_time = b;
 244         }
 245 }
 246
 247 void eDVBLocalTimeHandler::updateNonTuned()
 248 {
 249         updateTime(-1, 0, 0);
 250         m_updateNonTunedTimer->start(TIME_UPDATE_INTERVAL, true);
 251 }
 252
 253 void eDVBLocalTimeHandler::updateTime( time_t tp_time, eDVBChannel *chan, int update_count )
 254 {
 255         int time_difference;
 256         bool restart_tdt = false;
 257         if (!tp_time)
 258                 restart_tdt = true;
 259         else if (tp_time == -1)
 260         {
 261                 restart_tdt = true;
 262                 /*if ( eSystemInfo::getInstance()->getHwType() == eSystemInfo::DM7020 ||
 263                 ( eSystemInfo::getInstance()->getHwType() == eSystemInfo::DM7000
 264                         && eSystemInfo::getInstance()->hasStandbyWakeupTimer() ) )     TODO !!!!!!! */
 265                 {
 266                         eDebug("[eDVBLocalTimerHandler] no transponder tuned... or no TDT/TOT avail .. try to use RTC :)");
 267                         time_t rtc_time = getRTC();
 268                         if ( rtc_time ) // RTC Ready?
 269                         {
 270                                 tm now;
 271                                 localtime_r(&rtc_time, &now);
 272                                 eDebug("[eDVBLocalTimerHandler] RTC time is %02d:%02d:%02d",
 273                                         now.tm_hour,
 274                                         now.tm_min,
 275                                         now.tm_sec);
 276                                 time_t linuxTime=time(0);
 277                                 localtime_r(&linuxTime, &now);
 278                                 eDebug("[eDVBLocalTimerHandler] Receiver time is %02d:%02d:%02d",
 279                                         now.tm_hour,
 280                                         now.tm_min,
 281                                         now.tm_sec);
 282                                 time_difference = rtc_time - linuxTime;
 283                                 eDebug("[eDVBLocalTimerHandler] RTC to Receiver time difference is %ld seconds", linuxTime - rtc_time );
 284                                 if ( time_difference )
 285                                 {
 286                                         eDebug("[eDVBLocalTimerHandler] set Linux Time to RTC Time");
 287                                         timeval tnow;
 288                                         gettimeofday(&tnow,0);
 289                                         tnow.tv_sec=rtc_time;
 290                                         settimeofday(&tnow,0);
 291                                 }
 292                                 else if ( !time_difference )
 293                                         eDebug("[eDVBLocalTimerHandler] no change needed");
 294                                 else
 295                                         eDebug("[eDVBLocalTimerHandler] set to RTC time");
 296                                 /*emit*/ m_timeUpdated();
 297                         }
 298                         else
 299                                 eDebug("[eDVBLocalTimerHandler] shit RTC not ready :(");
 300                 }
 301         }
 302         else
 303         {
 304                 std::map< eDVBChannelID, int >::iterator it( m_timeOffsetMap.find( chan->getChannelID() ) );
 305
 306  // current linux time
 307                 time_t linuxTime = time(0);
 308
 309         // difference between current enigma time and transponder time
 310                 int enigma_diff = tp_time-linuxTime;
 311
 312                 int new_diff=0;
 313
 314                 bool updated = m_time_ready;
 315
 316                 if ( m_time_ready )  // ref time ready?
 317                 {
 318                         // difference between reference time (current enigma time)
 319                         // and the transponder time
 320                         eDebug("[eDVBLocalTimerHandler] diff is %d", enigma_diff);
 321                         if ( abs(enigma_diff) < 120 )
 322                         {
 323                                 eDebug("[eDVBLocalTimerHandler] diff < 120 .. use Transponder Time");
 324                                 m_timeOffsetMap[chan->getChannelID()] = 0;
 325                                 new_diff = enigma_diff;
 326                         }
 327                         else if ( it != m_timeOffsetMap.end() ) // correction saved?
 328                         {
 329                                 eDebug("[eDVBLocalTimerHandler] we have correction %d", it->second);
 330                                 time_t CorrectedTpTime = tp_time+it->second;
 331                                 int ddiff = CorrectedTpTime-linuxTime;
 332                                 eDebug("[eDVBLocalTimerHandler] diff after add correction is %d", ddiff);
 333                                 if ( abs(it->second) < 300 ) // stored correction < 5 min
 334                                 {
 335                                         eDebug("[eDVBLocalTimerHandler] use stored correction(<5 min)");
 336                                         new_diff = ddiff;
 337                                 }
 338                                 else if ( getRTC() )
 339                                 {
 340                                         time_t rtc=getRTC();
 341                                         m_timeOffsetMap[chan->getChannelID()] = rtc-tp_time;
 342                                         new_diff = rtc-linuxTime;  // set enigma time to rtc
 343                                         eDebug("[eDVBLocalTimerHandler] update stored correction to %ld (calced against RTC time)", rtc-tp_time );
 344                                 }
 345                                 else if ( abs(ddiff) <= 120 )
 346                                 {
 347 // with stored correction calced time difference is lower 2 min
 348 // this don't help when a transponder have a clock running to slow or to fast
 349 // then its better to have a DM7020 with always running RTC
 350                                         eDebug("[eDVBLocalTimerHandler] use stored correction(corr < 2 min)");
 351                                         new_diff = ddiff;
 352                                 }
 353                                 else  // big change in calced correction.. hold current time and update correction
 354                                 {
 355                                         eDebug("[eDVBLocalTimerHandler] update stored correction to %d", -enigma_diff);
 356                                         m_timeOffsetMap[chan->getChannelID()] = -enigma_diff;
 357                                 }
 358                         }
 359                         else
 360                         {
 361                                 eDebug("[eDVBLocalTimerHandler] no correction found... store calced correction(%d)",-enigma_diff);
 362                                 m_timeOffsetMap[chan->getChannelID()] = -enigma_diff;
 363                         }
 364                 }
 365                 else  // no time setted yet
 366                 {
 367                         if ( it != m_timeOffsetMap.end() )
 368                         {
 369                                 enigma_diff += it->second;
 370                                 eDebug("[eDVBLocalTimerHandler] we have correction (%d)... use", it->second );
 371                         }
 372                         else
 373                                 eDebug("[eDVBLocalTimerHandler] dont have correction.. set Transponder Diff");
 374                         new_diff=enigma_diff;
 375                         m_time_ready=true;
 376                 }
 377
 378                 time_t t = linuxTime+new_diff;
 379                 m_last_tp_time_difference=tp_time-t;
 380
 381                 if (!new_diff &&
 382                         updated) // overrride this check on first received TDT
 383                 {
 384                         eDebug("[eDVBLocalTimerHandler] not changed");
 385                         return;
 386                 }
 387
 388                 if ( !update_count )
 389                 {
 390                         // set rtc to calced transponder time when the first tdt is received on this
 391                         // transponder
 392                         setRTC(t);
 393                         eDebug("[eDVBLocalTimerHandler] update RTC");
 394                 }
 395                 else if (getRTC())
 396                 {
 397                         if (abs(getRTC() - t) > 60)
 398                         {
 399                                 eDebug("[eDVBLocalTimerHandler] difference between new linux time and RTC time is > 60 sec... transponder time looks not ok... use rtc time");
 400                                 t = getRTC();
 401                         }
 402                         else
 403                                 eDebug("[eDVBLocalTimerHandler] difference between linux time and RTC time is < 60 sec... so the transponder time looks ok");
 404                 }
 405                 else
 406                         eDebug("[eDVBLocalTimerHandler] no RTC available :(");
 407
 408                 tm now;
 409                 localtime_r(&t, &now);
 410                 eDebug("[eDVBLocalTimerHandler] time update to %02d:%02d:%02d",
 411                         now.tm_hour,
 412                         now.tm_min,
 413                         now.tm_sec);
 414
 415                 time_difference = t - linuxTime;   // calc our new linux_time -> enigma_time correction
 416                 eDebug("[eDVBLocalTimerHandler] m_time_difference is %d", time_difference );
 417
 418                 if ( time_difference )
 419                 {
 420                         eDebug("[eDVBLocalTimerHandler] set Linux Time");
 421                         timeval tnow;
 422                         gettimeofday(&tnow,0);
 423                         tnow.tv_sec=t;
 424                         settimeofday(&tnow,0);
 425                 }
 426
 427                  /*emit*/ m_timeUpdated();
 428         }
 429
 430         if ( restart_tdt )
 431         {
 432                 std::map<iDVBChannel*, channel_data>::iterator it =
 433                         m_knownChannels.find(chan);
 434                 if ( it != m_knownChannels.end() )
 435                 {
 436                         int updateCount = it->second.tdt->getUpdateCount();
 437                         it->second.tdt = 0;
 438                         it->second.tdt = new TDT(chan, updateCount);
 439                         it->second.tdt->startTimer(TIME_UPDATE_INTERVAL);  // restart TDT for this transponder in 30min
 440                 }
 441         }
 442 }
 443
 444 void eDVBLocalTimeHandler::DVBChannelAdded(eDVBChannel *chan)
 445 {
 446         if ( chan )
 447         {
 448 //              eDebug("[eDVBLocalTimerHandler] add channel %p", chan);
 449                 std::pair<std::map<iDVBChannel*, channel_data>::iterator, bool> tmp =
 450                         m_knownChannels.insert( std::pair<iDVBChannel*, channel_data>(chan, channel_data()) );
 451                 tmp.first->second.tdt = NULL;
 452                 tmp.first->second.channel = chan;
 453                 tmp.first->second.m_prevChannelState = -1;
 454                 chan->connectStateChange(slot(*this, &eDVBLocalTimeHandler::DVBChannelStateChanged), tmp.first->second.m_stateChangedConn);
 455         }
 456 }
 457
 458 void eDVBLocalTimeHandler::DVBChannelStateChanged(iDVBChannel *chan)
 459 {
 460         std::map<iDVBChannel*, channel_data>::iterator it =
 461                 m_knownChannels.find(chan);
 462         if ( it != m_knownChannels.end() )
 463         {
 464                 int state=0;
 465                 chan->getState(state);
 466                 if ( state != it->second.m_prevChannelState )
 467                 {
 468                         switch (state)
 469                         {
 470                                 case iDVBChannel::state_ok:
 471                                         eDebug("[eDVBLocalTimerHandler] channel %p running", chan);
 472                                         m_updateNonTunedTimer->stop();
 473                                         if (m_use_dvb_time) {
 474                                                 it->second.tdt = new TDT(it->second.channel);
 475                                                 it->second.tdt->start();
 476                                         }
 477                                         break;
 478                                 case iDVBChannel::state_release:
 479                                         eDebug("[eDVBLocalTimerHandler] remove channel %p", chan);
 480                                         m_knownChannels.erase(it);
 481                                         if (m_knownChannels.empty())
 482                                                 m_updateNonTunedTimer->start(TIME_UPDATE_INTERVAL, true);
 483                                         break;
 484                                 default: // ignore all other events
 485                                         return;
 486                         }
 487                         it->second.m_prevChannelState = state;
 488                 }
 489         }
 490 }