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[media] smsdvb: fix get_frontend

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In the get_frontend function, an internal copy of the dtv_frontend_properties
struct (which is never initialized) is copied over the frontend property cache
data structure, resetting everything to 0.
In particular, the delivery system is reset to 0 (which is an invalid value)
so the driver stops working as soon as a DVBv3 application calls the
get_frontend function, giving this error:

dvb_frontend_ioctl_legacy: doesn't know how to handle a DVBv3 call to delivery
system 0

This patch eliminates the unused internal copy of the dtv_frontend_properties
struct, and gives a proper implementation of the get_frontend function.

The original author of the patch is Panagiotis Malakoudis, who also tested
this new version on Ubuntu 11.10 with the latest media_build tree installed.
The original patch has been used on MIPS set-top-boxes for over one year,
but it was never posted on the linux-media list.
I ported the code to the current media_build tree (converting it to use the
dtv_frontend_properties struct) and added basic support for ISDB-T (untested).

Signed-off-by: Panagiotis Malakoudis <malakudi@gmail.com>
Signed-off-by: Gianluca Gennari <gennarone@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Gianluca Gennari 2012-02-20 07:50:33 -03:00 committed by Mauro Carvalho Chehab
parent 9bd58e77e6
commit d138210ffa
1 changed files with 116 additions and 7 deletions
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123
drivers/media/dvb/siano/smsdvb.c
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@ -49,9 +49,6 @@ struct smsdvb_client_t {
struct completion tune_done;
/* todo: save freq/band instead whole struct */
struct dtv_frontend_properties fe_params;
struct SMSHOSTLIB_STATISTICS_DVB_S sms_stat_dvb;
int event_fe_state;
int event_unc_state;
@ -744,12 +741,124 @@ static int smsdvb_get_frontend(struct dvb_frontend *fe)
struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
struct smsdvb_client_t *client =
container_of(fe, struct smsdvb_client_t, frontend);
struct smscore_device_t *coredev = client->coredev;
struct TRANSMISSION_STATISTICS_S *td =
&client->sms_stat_dvb.TransmissionData;
sms_debug("");
switch (smscore_get_device_mode(coredev)) {
case DEVICE_MODE_DVBT:
case DEVICE_MODE_DVBT_BDA:
fep->frequency = td->Frequency;
/* todo: */
memcpy(fep, &client->fe_params,
sizeof(struct dtv_frontend_properties));
switch (td->Bandwidth) {
case 6:
fep->bandwidth_hz = 6000000;
break;
case 7:
fep->bandwidth_hz = 7000000;
break;
case 8:
fep->bandwidth_hz = 8000000;
break;
}
switch (td->TransmissionMode) {
case 2:
fep->transmission_mode = TRANSMISSION_MODE_2K;
break;
case 8:
fep->transmission_mode = TRANSMISSION_MODE_8K;
}
switch (td->GuardInterval) {
case 0:
fep->guard_interval = GUARD_INTERVAL_1_32;
break;
case 1:
fep->guard_interval = GUARD_INTERVAL_1_16;
break;
case 2:
fep->guard_interval = GUARD_INTERVAL_1_8;
break;
case 3:
fep->guard_interval = GUARD_INTERVAL_1_4;
break;
}
switch (td->CodeRate) {
case 0:
fep->code_rate_HP = FEC_1_2;
break;
case 1:
fep->code_rate_HP = FEC_2_3;
break;
case 2:
fep->code_rate_HP = FEC_3_4;
break;
case 3:
fep->code_rate_HP = FEC_5_6;
break;
case 4:
fep->code_rate_HP = FEC_7_8;
break;
}
switch (td->LPCodeRate) {
case 0:
fep->code_rate_LP = FEC_1_2;
break;
case 1:
fep->code_rate_LP = FEC_2_3;
break;
case 2:
fep->code_rate_LP = FEC_3_4;
break;
case 3:
fep->code_rate_LP = FEC_5_6;
break;
case 4:
fep->code_rate_LP = FEC_7_8;
break;
}
switch (td->Constellation) {
case 0:
fep->modulation = QPSK;
break;
case 1:
fep->modulation = QAM_16;
break;
case 2:
fep->modulation = QAM_64;
break;
}
switch (td->Hierarchy) {
case 0:
fep->hierarchy = HIERARCHY_NONE;
break;
case 1:
fep->hierarchy = HIERARCHY_1;
break;
case 2:
fep->hierarchy = HIERARCHY_2;
break;
case 3:
fep->hierarchy = HIERARCHY_4;
break;
}
fep->inversion = INVERSION_AUTO;
break;
case DEVICE_MODE_ISDBT:
case DEVICE_MODE_ISDBT_BDA:
fep->frequency = td->Frequency;
fep->bandwidth_hz = 6000000;
/* todo: retrive the other parameters */
break;
default:
return -EINVAL;
}
return 0;
}