Common routine for use of dvb-core, demodulator and tuner for check
given DVB-C annex A parameters correctness.
Signed-off-by: Antti Palosaari <crope@xxxxxx>
---
drivers/media/dvb-core/dvb_frontend.c | 54 +++++++++++++++++++++++++++++++++++
drivers/media/dvb-core/dvb_frontend.h | 1 +
2 files changed, 55 insertions(+)
diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c
index 6413c74..6a19c87 100644
--- a/drivers/media/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb-core/dvb_frontend.c
@@ -2759,6 +2759,60 @@ int dvb_validate_params_dvbt2(struct dvb_frontend *fe)
}
EXPORT_SYMBOL(dvb_validate_params_dvbt2);
+int dvb_validate_params_dvbc_annex_a(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_DVBC_ANNEX_A:
+ break;
+ default:
+ dev_dbg(fe->dvb->device, "%s: delivery_system=%d\n", __func__,
+ c->delivery_system);
+ return -EINVAL;
+ }
+
+ /*
+ * TODO: NorDig Unified 2.2 specifies input frequency range
+ * 110 - 862 MHz. Do not limit it now as w_scan seems to start from
+ * 73 MHz until reason is clear.
+ */
+ if (c->frequency >= 0 && c->frequency <= 862000000) {
+ ;
+ } else {
+ dev_dbg(fe->dvb->device, "%s: frequency=%d\n", __func__,
+ c->frequency);
+ return -EINVAL;
+ }
+
+ if (c->symbol_rate >= 1000000 && c->symbol_rate <= 7000000) {
+ ;
+ } else {
+ dev_dbg(fe->dvb->device, "%s: symbol_rate=%d\n", __func__,
+ c->symbol_rate);
+ return -EINVAL;
+ }
+
+ switch (c->modulation) {
+ case QAM_AUTO:
+ case QAM_16:
+ case QAM_32:
+ case QAM_64:
+ case QAM_128:
+ case QAM_256:
+ break;
+ default:
+ dev_dbg(fe->dvb->device, "%s: modulation=%d\n", __func__,
+ c->modulation);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(dvb_validate_params_dvbc_annex_a);
+
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 bcd572d..e6e6fe1 100644
--- a/drivers/media/dvb-core/dvb_frontend.h
+++ b/drivers/media/dvb-core/dvb_frontend.h
@@ -427,5 +427,6 @@ 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);
#endif
--
1.7.11.2
--
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