Common routine for use of dvb-core, demodulator and tuner for check
given DVB-T2 parameters correctness.
Signed-off-by: Antti Palosaari <crope@xxxxxx>
---
drivers/media/dvb-core/dvb_frontend.c | 118 ++++++++++++++++++++++++++++++++++
drivers/media/dvb-core/dvb_frontend.h | 1 +
2 files changed, 119 insertions(+)
diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c
index 4abb648..6413c74 100644
--- a/drivers/media/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb-core/dvb_frontend.c
@@ -2641,6 +2641,124 @@ int dvb_validate_params_dvbt(struct dvb_frontend *fe)
}
EXPORT_SYMBOL(dvb_validate_params_dvbt);
+int dvb_validate_params_dvbt2(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+
+ dev_dbg(fe->dvb->device, "%s:\n", __func__);
+
+ switch (c->delivery_system) {
+ case SYS_DVBT2:
+ break;
+ default:
+ dev_dbg(fe->dvb->device, "%s: delivery_system=%d\n", __func__,
+ c->delivery_system);
+ return -EINVAL;
+ }
+
+ /*
+ * DVB-T2 specification as such does not specify any frequency bands.
+ * Define real life limits still. L-Band 1452 - 1492 MHz may exits in
+ * future too.
+ */
+ if (c->frequency >= 174000000 && c->frequency <= 230000000) {
+ ;
+ } else if (c->frequency >= 470000000 && c->frequency <= 862000000) {
+ ;
+ } else {
+ dev_dbg(fe->dvb->device, "%s: frequency=%d\n", __func__,
+ c->frequency);
+ return -EINVAL;
+ }
+
+ switch (c->bandwidth_hz) {
+ case 6000000:
+ case 7000000:
+ case 8000000:
+ case 1700000:
+ case 5000000:
+ case 10000000:
+ break;
+ default:
+ dev_dbg(fe->dvb->device, "%s: bandwidth_hz=%d\n", __func__,
+ c->bandwidth_hz);
+ return -EINVAL;
+ }
+
+ /*
+ * Valid Physical Layer Pipe (PLP) values are 0 - 255
+ */
+ if (c->dvbt2_plp_id <= 255) {
+ ;
+ } else {
+ dev_dbg(fe->dvb->device, "%s: dvbt2_plp_id=%d\n", __func__,
+ c->dvbt2_plp_id);
+ return -EINVAL;
+ }
+
+ switch (c->transmission_mode) {
+ case TRANSMISSION_MODE_AUTO:
+ case TRANSMISSION_MODE_2K:
+ case TRANSMISSION_MODE_8K:
+ case TRANSMISSION_MODE_1K:
+ case TRANSMISSION_MODE_4K:
+ case TRANSMISSION_MODE_16K:
+ case TRANSMISSION_MODE_32K:
+ break;
+ default:
+ dev_dbg(fe->dvb->device, "%s: transmission_mode=%d\n", __func__,
+ c->transmission_mode);
+ return -EINVAL;
+ }
+
+ switch (c->modulation) {
+ case QAM_AUTO:
+ case QPSK:
+ case QAM_16:
+ case QAM_64:
+ case QAM_256:
+ break;
+ default:
+ dev_dbg(fe->dvb->device, "%s: modulation=%d\n", __func__,
+ c->modulation);
+ return -EINVAL;
+ }
+
+ switch (c->guard_interval) {
+ case GUARD_INTERVAL_AUTO:
+ case GUARD_INTERVAL_1_32:
+ case GUARD_INTERVAL_1_16:
+ case GUARD_INTERVAL_1_8:
+ case GUARD_INTERVAL_1_4:
+ case GUARD_INTERVAL_1_128:
+ case GUARD_INTERVAL_19_128:
+ case GUARD_INTERVAL_19_256:
+ break;
+ default:
+ dev_dbg(fe->dvb->device, "%s: guard_interval=%d\n", __func__,
+ c->guard_interval);
+ return -EINVAL;
+ }
+
+ switch (c->fec_inner) {
+ case FEC_AUTO:
+ case FEC_1_2:
+ case FEC_3_5:
+ case FEC_2_3:
+ case FEC_3_4:
+ case FEC_4_5:
+ case FEC_5_6:
+ break;
+ default:
+ dev_dbg(fe->dvb->device, "%s: fec_inner=%d\n", __func__,
+ c->fec_inner);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(dvb_validate_params_dvbt2);
+
int dvb_register_frontend(struct dvb_adapter* dvb,
struct dvb_frontend* fe)
{
diff --git a/drivers/media/dvb-core/dvb_frontend.h b/drivers/media/dvb-core/dvb_frontend.h
index 6df0c44..bcd572d 100644
--- a/drivers/media/dvb-core/dvb_frontend.h
+++ b/drivers/media/dvb-core/dvb_frontend.h
@@ -426,5 +426,6 @@ extern void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec);
extern s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime);
extern int dvb_validate_params_dvbt(struct dvb_frontend *fe);
+extern int dvb_validate_params_dvbt2(struct dvb_frontend *fe);
#endif
--
1.7.11.2
--
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