tune.c

DVBtune is a simple tuning application for DVB cards supported by the Linux DVB driver

/* dvbtune - tune.c

   Copyright (C) Dave Chapman 2001,2002
  
   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; either version 2
   of the License, or (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
   Or, point your browser to http://www.gnu.org/copyleft/gpl.html

*/
   
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <ctype.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <unistd.h>
#include <error.h>
#include <errno.h>

#ifdef NEWSTRUCT
#include <linux/dvb/dmx.h>
#include <linux/dvb/frontend.h>
#else
#include <ost/dmx.h>
#include <ost/sec.h>
#include <ost/frontend.h>
#endif

#include "tune.h"

#ifndef NEWSTRUCT
int OSTSelftest(int fd)
{
    int ans;

    if ( (ans = ioctl(fd,FE_SELFTEST,0) < 0)){
        perror("FE SELF TEST: ");
        return -1;
    }

    return 0;
}

int OSTSetPowerState(int fd, uint32_t state)
{
    int ans;

    if ( (ans = ioctl(fd,FE_SET_POWER_STATE,state) < 0)){
        perror("OST SET POWER STATE: ");
        return -1;
    }

    return 0;
}

int OSTGetPowerState(int fd, uint32_t *state)
{
    int ans;

    if ( (ans = ioctl(fd,FE_GET_POWER_STATE,state) < 0)){
        perror("OST GET POWER STATE: ");
        return -1;
    }

    switch(*state){
    case FE_POWER_ON:
        fprintf(stderr,"POWER ON (%d)\n",*state);
        break;
    case FE_POWER_STANDBY:
        fprintf(stderr,"POWER STANDBY (%d)\n",*state);
        break;
    case FE_POWER_SUSPEND:
        fprintf(stderr,"POWER SUSPEND (%d)\n",*state);
        break;
    case FE_POWER_OFF:
        fprintf(stderr,"POWER OFF (%d)\n",*state);
        break;
    default:
        fprintf(stderr,"unknown (%d)\n",*state);
        break;
    }

    return 0;
}

int SecGetStatus (int fd, struct secStatus *state)
{
    int ans;

    if ( (ans = ioctl(fd,SEC_GET_STATUS, state) < 0)){
        perror("SEC GET STATUS: ");
        return -1;
    }

    switch (state->busMode){
    case SEC_BUS_IDLE:
        fprintf(stderr,"SEC BUS MODE:  IDLE (%d)\n",state->busMode);
        break;
    case SEC_BUS_BUSY:
        fprintf(stderr,"SEC BUS MODE:  BUSY (%d)\n",state->busMode);
        break;
    case SEC_BUS_OFF:
        fprintf(stderr,"SEC BUS MODE:  OFF  (%d)\n",state->busMode);
        break;
    case SEC_BUS_OVERLOAD:
        fprintf(stderr,"SEC BUS MODE:  OVERLOAD (%d)\n",state->busMode);
        break;
    default:
        fprintf(stderr,"SEC BUS MODE:  unknown  (%d)\n",state->busMode);
        break;
    }

    switch (state->selVolt){
    case SEC_VOLTAGE_OFF:
        fprintf(stderr,"SEC VOLTAGE:  OFF (%d)\n",state->selVolt);
        break;
    case SEC_VOLTAGE_LT:
        fprintf(stderr,"SEC VOLTAGE:  LT  (%d)\n",state->selVolt);
        break;
    case SEC_VOLTAGE_13:
        fprintf(stderr,"SEC VOLTAGE:  13  (%d)\n",state->selVolt);
        break;
    case SEC_VOLTAGE_13_5:
        fprintf(stderr,"SEC VOLTAGE:  13.5 (%d)\n",state->selVolt);
        break;
    case SEC_VOLTAGE_18:
        fprintf(stderr,"SEC VOLTAGE:  18 (%d)\n",state->selVolt);
        break;
    case SEC_VOLTAGE_18_5:
        fprintf(stderr,"SEC VOLTAGE:  18.5 (%d)\n",state->selVolt);
        break;
    default:
        fprintf(stderr,"SEC VOLTAGE:  unknown (%d)\n",state->selVolt);
        break;
    }

    fprintf(stderr,"SEC CONT TONE: %s\n", (state->contTone == SEC_TONE_ON ? "ON" : "OFF"));
    return 0;
}
#endif

void print_status(FILE* fd,fe_status_t festatus) {
  fprintf(fd,"FE_STATUS:");
  if (festatus & FE_HAS_SIGNAL) fprintf(fd," FE_HAS_SIGNAL");
#ifdef NEWSTRUCT
  if (festatus & FE_TIMEDOUT) fprintf(fd," FE_TIMEDOUT");
#else
  if (festatus & FE_HAS_POWER) fprintf(fd," FE_HAS_POWER");
  if (festatus & FE_SPECTRUM_INV) fprintf(fd," FE_SPECTRUM_INV");
  if (festatus & FE_TUNER_HAS_LOCK) fprintf(fd," FE_TUNER_HAS_LOCK");
#endif
  if (festatus & FE_HAS_LOCK) fprintf(fd," FE_HAS_LOCK");
  if (festatus & FE_HAS_CARRIER) fprintf(fd," FE_HAS_CARRIER");
  if (festatus & FE_HAS_VITERBI) fprintf(fd," FE_HAS_VITERBI");
  if (festatus & FE_HAS_SYNC) fprintf(fd," FE_HAS_SYNC");
  fprintf(fd,"\n");
}

#ifdef NEWSTRUCT
struct diseqc_cmd {
   struct dvb_diseqc_master_cmd cmd;
   uint32_t wait;
};

void diseqc_send_msg(int fd, fe_sec_voltage_t v, struct diseqc_cmd *cmd,
		     fe_sec_tone_mode_t t, fe_sec_mini_cmd_t b)
{
   ioctl(fd, FE_SET_TONE, SEC_TONE_OFF);
   ioctl(fd, FE_SET_VOLTAGE, v);
   usleep(15 * 1000);
   ioctl(fd, FE_DISEQC_SEND_MASTER_CMD, &cmd->cmd);
   usleep(cmd->wait * 1000);
   usleep(15 * 1000);
   ioctl(fd, FE_DISEQC_SEND_BURST, b);
   usleep(15 * 1000);
   ioctl(fd, FE_SET_TONE, t);
}




/* digital satellite equipment control,
 * specification is available from http://www.eutelsat.com/ 
 */
static int do_diseqc(int secfd, int sat_no, int pol, int hi_lo)
{
   struct diseqc_cmd cmd =
       { {{0xe0, 0x10, 0x38, 0xf0, 0x00, 0x00}, 4}, 0 };

   /* param: high nibble: reset bits, low nibble set bits,
    * bits are: option, position, polarizaion, band
    */
   cmd.cmd.msg[3] =
       0xf0 | (((sat_no * 4) & 0x0f) | (hi_lo ? 1 : 0) | (pol ? 0 : 2));

   diseqc_send_msg(secfd, pol,
		   &cmd, hi_lo,
		   (sat_no / 4) % 2 ? SEC_MINI_B : SEC_MINI_A);

   return 1;
}

int check_status(int fd_frontend,struct dvb_frontend_parameters* feparams,int tone) {
  int32_t strength;
  fe_status_t festatus;
  struct dvb_frontend_event event;
  struct dvb_frontend_info fe_info;
  struct pollfd pfd[1];
  int status;

  if (ioctl(fd_frontend,FE_SET_FRONTEND,feparams) < 0) {
    perror("ERROR tuning channel\n");
    return -1;
  }

  pfd[0].fd = fd_frontend;
  pfd[0].events = POLLIN;

  event.status=0;
  while (((event.status & FE_TIMEDOUT)==0) && ((event.status & FE_HAS_LOCK)==0)) {
    fprintf(stderr,"polling....\n");
    if (poll(pfd,1,10000)){
      if (pfd[0].revents & POLLIN){
        fprintf(stderr,"Getting frontend event\n");
        if ((status = ioctl(fd_frontend, FE_GET_EVENT, &event)) < 0){
	  if (errno != EOVERFLOW) {
	    perror("FE_GET_EVENT");
	    fprintf(stderr,"status = %d\n", status);
	    fprintf(stderr,"errno = %d\n", errno);
	    return -1;
	  }
	  else fprintf(stderr,"Overflow error, trying again (status = %d, errno = %d)", status, errno);
        }
      }
      print_status(stderr,event.status);
    }
  }

  if (event.status & FE_HAS_LOCK) {
      switch(fe_info.type) {
         case FE_OFDM:
           fprintf(stderr,"Event:  Frequency: %d\n",event.parameters.frequency);
           break;
         case FE_QPSK:
           fprintf(stderr,"Event:  Frequency: %d\n",(unsigned int)((event.parameters.frequency)+(tone==SEC_TONE_OFF ? LOF1 : LOF2)));
           fprintf(stderr,"        SymbolRate: %d\n",event.parameters.u.qpsk.symbol_rate);
           fprintf(stderr,"        FEC_inner:  %d\n",event.parameters.u.qpsk.fec_inner);
           fprintf(stderr,"\n");
           break;
         case FE_QAM:
           fprintf(stderr,"Event:  Frequency: %d\n",event.parameters.frequency);
           fprintf(stderr,"        SymbolRate: %d\n",event.parameters.u.qpsk.symbol_rate);
           fprintf(stderr,"        FEC_inner:  %d\n",event.parameters.u.qpsk.fec_inner);
           break;
         default:
           break;
      }

      strength=0;
      ioctl(fd_frontend,FE_READ_BER,&strength);
      fprintf(stderr,"Bit error rate: %d\n",strength);

      strength=0;
      ioctl(fd_frontend,FE_READ_SIGNAL_STRENGTH,&strength);
      fprintf(stderr,"Signal strength: %d\n",strength);

      strength=0;
      ioctl(fd_frontend,FE_READ_SNR,&strength);
      fprintf(stderr,"SNR: %d\n",strength);

      festatus=0;
      ioctl(fd_frontend,FE_READ_STATUS,&festatus);
      print_status(stderr,festatus);
    } else {
    fprintf(stderr,"Not able to lock to the signal on the given frequency\n");
    return -1;
  }
  return 0;
}
#else
int check_status(int fd_frontend,FrontendParameters* feparams,int tone) {
  int i,res;
  int32_t strength;
  fe_status_t festatus;
  FrontendEvent event;
  FrontendInfo fe_info;
  struct pollfd pfd[1];