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zapit: add workaround for broken frontends

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some frontends seem to not really lower the voltage to 13V
if no DC load is present on the coax cable, so allow to turn
of the lnb voltage completely to work around the issue and
allow usage of other devices on the same unicable bus
This commit is contained in:
Stefan Seyfried
2013-12-30 16:43:39 +01:00
parent 5f31754bbd
commit b113ef358f
1 changed files with 13 additions and 4 deletions
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17
src/zapit/src/frontend.cpp
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@@ -160,6 +160,8 @@ typedef enum dvb_fec {
fNone = 15 fNone = 15
} dvb_fec_t; } dvb_fec_t;
static fe_sec_voltage_t unicable_lowvolt = SEC_VOLTAGE_13;
#define TIME_STEP 200 #define TIME_STEP 200
#define TIMEOUT_MAX_MS (feTimeout*100) #define TIMEOUT_MAX_MS (feTimeout*100)
/*********************************************************************************************************/ /*********************************************************************************************************/
@@ -198,6 +200,13 @@ CFrontend::CFrontend(int Number, int Adapter)
feTimeout = 40; feTimeout = 40;
currentVoltage = SEC_VOLTAGE_OFF; currentVoltage = SEC_VOLTAGE_OFF;
currentToneMode = SEC_TONE_ON; currentToneMode = SEC_TONE_ON;
/* some broken hardware (a coolstream neo on my desk) does not lower
* the voltage below 18V without enough DC load on the coax cable.
* with unicable bus setups, there is no DC load on the coax... leading
* to a completely blocked bus due to this broken hardware.
* Switching off the voltage completely works around this issue */
if (getenv("UNICABLE_BROKEN_FRONTEND") != NULL)
unicable_lowvolt = SEC_VOLTAGE_OFF;
memset(&info, 0, sizeof(info)); memset(&info, 0, sizeof(info));
} }
@@ -902,10 +911,10 @@ void CFrontend::secSetVoltage(const fe_sec_voltage_t voltage, const uint32_t ms)
return; return;
printf("[fe%d] voltage %s\n", fenumber, voltage == SEC_VOLTAGE_OFF ? "OFF" : voltage == SEC_VOLTAGE_13 ? "13" : "18"); printf("[fe%d] voltage %s\n", fenumber, voltage == SEC_VOLTAGE_OFF ? "OFF" : voltage == SEC_VOLTAGE_13 ? "13" : "18");
if (config.diseqcType == DISEQC_UNICABLE) { if (config.diseqcType == DISEQC_UNICABLE && voltage != SEC_VOLTAGE_OFF) {
/* see my comment in secSetTone... */ /* see my comment in secSetTone... */
currentVoltage = voltage; /* need to know polarization for unicable */ currentVoltage = voltage; /* need to know polarization for unicable */
fop(ioctl, FE_SET_VOLTAGE, SEC_VOLTAGE_13); /* voltage must not be 18V */ fop(ioctl, FE_SET_VOLTAGE, unicable_lowvolt); /* voltage must not be 18V */
return; return;
} }
@@ -982,7 +991,7 @@ void CFrontend::setDiseqcType(const diseqc_t newDiseqcType, bool force)
if (newDiseqcType == DISEQC_UNICABLE) { if (newDiseqcType == DISEQC_UNICABLE) {
secSetTone(SEC_TONE_OFF, 0); secSetTone(SEC_TONE_OFF, 0);
secSetVoltage(SEC_VOLTAGE_13, 0); secSetVoltage(unicable_lowvolt, 0);
} }
else if ((force && (newDiseqcType != NO_DISEQC)) || else if ((force && (newDiseqcType != NO_DISEQC)) ||
((config.diseqcType <= MINI_DISEQC) && (newDiseqcType > MINI_DISEQC))) { ((config.diseqcType <= MINI_DISEQC) && (newDiseqcType > MINI_DISEQC))) {
@@ -1153,7 +1162,7 @@ uint32_t CFrontend::sendEN50494TuningCommand(const uint32_t frequency, const int
fop(ioctl, FE_SET_VOLTAGE, SEC_VOLTAGE_18); fop(ioctl, FE_SET_VOLTAGE, SEC_VOLTAGE_18);
usleep(15 * 1000); /* en50494 says: >4ms and < 22 ms */ usleep(15 * 1000); /* en50494 says: >4ms and < 22 ms */
sendDiseqcCommand(&cmd, 50); /* en50494 says: >2ms and < 60 ms */ sendDiseqcCommand(&cmd, 50); /* en50494 says: >2ms and < 60 ms */
fop(ioctl, FE_SET_VOLTAGE, SEC_VOLTAGE_13); fop(ioctl, FE_SET_VOLTAGE, unicable_lowvolt);
} }
return ret; return ret;
} }