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/* 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 <time.h>
#include <errno.h>
#include <linux/dvb/dmx.h>
#include <linux/dvb/frontend.h>
#include "tune.h"
void print_status(FILE* fd,fe_status_t festatus) {
fprintf(fd,"FE_STATUS:");
if (festatus & FE_HAS_SIGNAL) fprintf(fd," FE_HAS_SIGNAL");
if (festatus & FE_TIMEDOUT) fprintf(fd," FE_TIMEDOUT");
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");
}
struct diseqc_cmd {
struct dvb_diseqc_master_cmd cmd;
uint32_t wait;
};
static int diseqc_send_msg(int fd, fe_sec_voltage_t v, struct diseqc_cmd *cmd,
fe_sec_tone_mode_t t, unsigned char sat_no)
{
if(ioctl(fd, FE_SET_TONE, SEC_TONE_OFF) < 0)
return -1;
if(ioctl(fd, FE_SET_VOLTAGE, v) < 0)
return -1;
usleep(15 * 1000);
if(sat_no >= 1 && sat_no <= 4) //1.x compatible equipment
{
if(ioctl(fd, FE_DISEQC_SEND_MASTER_CMD, &cmd->cmd) < 0)
return -1;
usleep(cmd->wait * 1000);
usleep(15 * 1000);
}
else //A or B simple diseqc
{
fprintf(stderr, "SETTING SIMPLE %c BURST\n", sat_no);
if(ioctl(fd, FE_DISEQC_SEND_BURST, (sat_no == 'B' ? SEC_MINI_B : SEC_MINI_A)) < 0)
return -1;
usleep(15 * 1000);
}
if(ioctl(fd, FE_SET_TONE, t) < 0)
return -1;
return 0;
}
/* digital satellite equipment control,
* specification is available from http://www.eutelsat.com/
*/
static int do_diseqc(int fd, unsigned char sat_no, int polv, int hi_lo)
{
struct diseqc_cmd cmd = { {{0xe0, 0x10, 0x38, 0xf0, 0x00, 0x00}, 4}, 0 };
if(sat_no != 0)
{
unsigned char d = sat_no;
/* param: high nibble: reset bits, low nibble set bits,
* bits are: option, position, polarizaion, band
*/
cmd.cmd.msg[3] =
0xf0 | (((sat_no * 4) & 0x0f) | (polv ? 0 : 2) | (hi_lo ? 1 : 0));
return diseqc_send_msg(fd,
polv ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18,
&cmd,
hi_lo ? SEC_TONE_ON : SEC_TONE_OFF,
d);
}
else //only tone and voltage
{
fprintf(stderr, "Setting only tone %s and voltage %dV\n", (hi_lo ? "ON" : "OFF"), (polv ? 13 : 18));
if(ioctl(fd, FE_SET_VOLTAGE, (polv ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18)) < 0)
return -1;
if(ioctl(fd, FE_SET_TONE, (hi_lo ? SEC_TONE_ON : SEC_TONE_OFF)) < 0)
return -1;
usleep(15 * 1000);
return 0;
}
}
int check_status(int fd_frontend,int type, struct dvb_frontend_parameters* feparams,unsigned int base) {
int32_t strength;
fe_status_t festatus;
struct pollfd pfd[1];
int locks=0, ok=0;
time_t tm1, tm2;
if (ioctl(fd_frontend,FE_SET_FRONTEND,feparams) < 0) {
perror("ERROR tuning channel\n");
return -1;
}
pfd[0].fd = fd_frontend;
pfd[0].events = POLLPRI;
tm1 = tm2 = time((time_t*) NULL);
fprintf(stderr,"Getting frontend status\n");
while (!ok) {
festatus = 0;
if (poll(pfd,1,3000) > 0){
if (pfd[0].revents & POLLPRI){
if(ioctl(fd_frontend,FE_READ_STATUS,&festatus) >= 0)
if(festatus & FE_HAS_LOCK)
locks++;
}
}
usleep(10000);
tm2 = time((time_t*) NULL);
if((festatus & FE_TIMEDOUT) || (locks >= 2) || (tm2 - tm1 >= 3))
ok = 1;
}
if (festatus & FE_HAS_LOCK) {
if(ioctl(fd_frontend,FE_GET_FRONTEND,feparams) >= 0) {
switch(type) {
case FE_OFDM:
fprintf(stderr,"Event: Frequency: %d\n",feparams->frequency);
break;
case FE_QPSK:
fprintf(stderr,"Event: Frequency: %d\n",(unsigned int)(feparams->frequency + base));
fprintf(stderr," SymbolRate: %d\n",feparams->u.qpsk.symbol_rate);
fprintf(stderr," FEC_inner: %d\n",feparams->u.qpsk.fec_inner);
fprintf(stderr,"\n");
break;
case FE_QAM:
fprintf(stderr,"Event: Frequency: %d\n",feparams->frequency);
fprintf(stderr," SymbolRate: %d\n",feparams->u.qpsk.symbol_rate);
fprintf(stderr," FEC_inner: %d\n",feparams->u.qpsk.fec_inner);
break;
#ifdef DVB_ATSC
case FE_ATSC:
fprintf(stderr, "Event: Frequency: %d\n",feparams->frequency);
fprintf(stderr, " Modulation: %d\n",feparams->u.vsb.modulation);
break;
#endif
default:
break;
}
}
strength=0;
if(ioctl(fd_frontend,FE_READ_BER,&strength) >= 0)
fprintf(stderr,"Bit error rate: %d\n",strength);
strength=0;
if(ioctl(fd_frontend,FE_READ_SIGNAL_STRENGTH,&strength) >= 0)
fprintf(stderr,"Signal strength: %d\n",strength);
strength=0;
if(ioctl(fd_frontend,FE_READ_SNR,&strength) >= 0)
fprintf(stderr,"SNR: %d\n",strength);
strength=0;
if(ioctl(fd_frontend,FE_READ_UNCORRECTED_BLOCKS,&strength) >= 0)
fprintf(stderr,"UNC: %d\n",strength);
print_status(stderr,festatus);
} else {
fprintf(stderr,"Not able to lock to the signal on the given frequency\n");
return -1;
}
return 0;
}
int tune_it(int fd_frontend, unsigned int freq, unsigned int srate, char pol, int tone, fe_spectral_inversion_t specInv, unsigned char diseqc,fe_modulation_t modulation,fe_code_rate_t HP_CodeRate,fe_transmit_mode_t TransmissionMode,fe_guard_interval_t guardInterval, fe_bandwidth_t bandwidth, fe_code_rate_t LP_CodeRate, fe_hierarchy_t hier) {
int res, hi_lo, dfd;
unsigned int base;
struct dvb_frontend_parameters feparams;
struct dvb_frontend_info fe_info;
if ( (res = ioctl(fd_frontend,FE_GET_INFO, &fe_info) < 0)){
perror("FE_GET_INFO: ");
return -1;
}
fprintf(stderr,"Using DVB card \"%s\", freq=%d\n",fe_info.name, freq);
if (freq < 1000000) freq*=1000UL;
switch(fe_info.type) {
case FE_OFDM:
feparams.frequency=freq;
feparams.inversion=INVERSION_OFF;
feparams.u.ofdm.bandwidth=bandwidth;
feparams.u.ofdm.code_rate_HP=HP_CodeRate;
feparams.u.ofdm.code_rate_LP=LP_CodeRate;
feparams.u.ofdm.constellation=modulation;
feparams.u.ofdm.transmission_mode=TransmissionMode;
feparams.u.ofdm.guard_interval=guardInterval;
feparams.u.ofdm.hierarchy_information=hier;
fprintf(stderr,"tuning DVB-T (%s) to %d Hz, Bandwidth: %d\n",DVB_T_LOCATION,freq,
bandwidth==BANDWIDTH_8_MHZ ? 8 : (bandwidth==BANDWIDTH_7_MHZ ? 7 : 6));
break;
case FE_QPSK:
pol = toupper(pol);
if (freq > 2200000) {
if (freq < SLOF) {
feparams.frequency=(freq-LOF1);
hi_lo = 0;
base = LOF1;
} else {
feparams.frequency=(freq-LOF2);
hi_lo = 1;
base = LOF2;
}
} else {
feparams.frequency=freq;
base = 0;
}
fprintf(stderr,"tuning DVB-S to Freq: %u, Pol:%c Srate=%d, 22kHz tone=%s, LNB: %d, SLOF %d, LOF1: %d, LOF2: %d\n",
feparams.frequency,pol,srate,tone == SEC_TONE_ON ? "on" : "off", diseqc, SLOF/1000UL, LOF1/1000UL, LOF2/1000UL);
feparams.inversion=specInv;
feparams.u.qpsk.symbol_rate=srate;
feparams.u.qpsk.fec_inner=FEC_AUTO;
dfd = fd_frontend;
if(do_diseqc(dfd, diseqc, (pol == 'V' ? 1 : 0), hi_lo) == 0)
fprintf(stderr, "DISEQC SETTING SUCCEEDED\n");
else {
fprintf(stderr, "DISEQC SETTING FAILED\n");
return -1;
}
break;
case FE_QAM:
fprintf(stderr,"tuning DVB-C to %d, srate=%d\n",freq,srate);
feparams.frequency=freq;
feparams.inversion=specInv;
feparams.u.qam.symbol_rate = srate;
feparams.u.qam.fec_inner = FEC_AUTO;
feparams.u.qam.modulation = modulation;
break;
#ifdef DVB_ATSC
case FE_ATSC:
fprintf(stderr, "tuning ATSC to %d, modulation=%d\n",freq,modulation);
feparams.frequency=freq;
feparams.u.vsb.modulation = modulation;
break;
#endif
default:
fprintf(stderr,"Unknown FE type. Aborting\n");
exit(-1);
}
usleep(100000);
return(check_status(fd_frontend,fe_info.type,&feparams,base));
}
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