Common routine for use of dvb-core, demodulator and tuner for check
given DTMB parameters correctness.
Signed-off-by: Antti Palosaari <cr...@iki.fi>
---
drivers/media/dvb-core/dvb_frontend.c | 97 +++++++++++++++++++++++++++++++++++
drivers/media/dvb-core/dvb_frontend.h | 1 +
2 files changed, 98 insertions(+)
diff --git a/drivers/media/dvb-core/dvb_frontend.c
b/drivers/media/dvb-core/dvb_frontend.c
index 6a19c87..7c3ba26 100644
--- a/drivers/media/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb-core/dvb_frontend.c
@@ -2813,6 +2813,103 @@ int dvb_validate_params_dvbc_annex_a(struct
dvb_frontend *fe)
}
EXPORT_SYMBOL(dvb_validate_params_dvbc_annex_a);
+int dvb_validate_params_dtmb(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_DTMB:
+ break;
+ default:
+ dev_dbg(fe->dvb->device, "%s: delivery_system=%d\n", __func__,
+ c->delivery_system);
+ return -EINVAL;
+ }
+
+ 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 8000000:
+ break;
+ default:
+ dev_dbg(fe->dvb->device, "%s: bandwidth_hz=%d\n", __func__,
+ c->bandwidth_hz);
+ return -EINVAL;
+ }
+
+ switch (c->modulation) {
+ case QAM_AUTO:
+ case QPSK: /* QAM4 */
+ case QAM_16:
+ case QAM_32:
+ case QAM_64:
+ case QAM_4_NR:
+ break;
+ default:
+ dev_dbg(fe->dvb->device, "%s: modulation=%d\n", __func__,
+ c->modulation);
+ return -EINVAL;
+ }
+
+ switch (c->transmission_mode) {
+ case TRANSMISSION_MODE_AUTO:
+ case TRANSMISSION_MODE_C1:
+ case TRANSMISSION_MODE_C3780:
+ break;
+ default:
+ dev_dbg(fe->dvb->device, "%s: transmission_mode=%d\n", __func__,
+ c->transmission_mode);
+ return -EINVAL;
+ }
+
+ switch (c->guard_interval) {
+ case GUARD_INTERVAL_AUTO:
+ case GUARD_INTERVAL_PN420:
+ case GUARD_INTERVAL_PN595:
+ case GUARD_INTERVAL_PN945:
+ break;
+ default:
+ dev_dbg(fe->dvb->device, "%s: guard_interval=%d\n", __func__,
+ c->guard_interval);
+ return -EINVAL;
+ }
+
+ /* inner coding LDPC */
+ switch (c->fec_inner) {
+ case FEC_AUTO:
+ case FEC_2_5: /* 0.4 */
+ case FEC_3_5: /* 0.6 */
+ case FEC_4_5: /* 0.8 */
+ break;
+ default:
+ dev_dbg(fe->dvb->device, "%s: fec_inner=%d\n", __func__,
+ c->fec_inner);
+ return -EINVAL;
+ }
+
+ switch (c->interleaving) {
+ case INTERLEAVING_AUTO:
+ case INTERLEAVING_240:
+ case INTERLEAVING_720:
+ break;
+ default:
+ dev_dbg(fe->dvb->device, "%s: interleaving=%d\n", __func__,
+ c->interleaving);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(dvb_validate_params_dtmb);
+
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 e6e6fe1..9499039 100644
--- a/drivers/media/dvb-core/dvb_frontend.h
+++ b/drivers/media/dvb-core/dvb_frontend.h
@@ -428,5 +428,6 @@ 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);
extern int dvb_validate_params_dvbc_annex_a(struct dvb_frontend *fe);
+extern int dvb_validate_params_dtmb(struct dvb_frontend *fe);
#endif
--
1.7.11.2
--
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