[PATCH 2/2] media: stv090x: add physical layer scrambling support

[Athanasios Oikonomou]

This commit uses the new property scrambling_sequence_index
to control PLS.
By default we are using the gold sequence 0 and only gold sequences
expected on the new property.

Please note that all services use PLS, just most with the default
sequence 0 and many demods only support gold 0.

Signed-off-by: Athanasios Oikonomou <ath...@gmail.com>
---
 drivers/media/dvb-frontends/stv090x.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/media/dvb-frontends/stv090x.c 
b/drivers/media/dvb-frontends/stv090x.c
index 7ef469c..9369a11 100644
--- a/drivers/media/dvb-frontends/stv090x.c
+++ b/drivers/media/dvb-frontends/stv090x.c
@@ -3429,6 +3429,21 @@ static enum stv090x_signal_state stv090x_algo(struct 
stv090x_state *state)
        return -1;
 }
 
+static int stv090x_set_pls(struct stv090x_state *state, u32 pls_code)
+{
+       dprintk(FE_DEBUG, 1, "Set Gold PLS code %d", pls_code);
+       if (STV090x_WRITE_DEMOD(state, PLROOT0, pls_code & 0xff) < 0)
+               goto err;
+       if (STV090x_WRITE_DEMOD(state, PLROOT1, (pls_code >> 8) & 0xff) < 0)
+               goto err;
+       if (STV090x_WRITE_DEMOD(state, PLROOT2, 0x04 | (pls_code >> 16)) < 0)
+               goto err;
+       return 0;
+err:
+       dprintk(FE_ERROR, 1, "I/O error");
+       return -1;
+}
+
 static int stv090x_set_mis(struct stv090x_state *state, int mis)
 {
        u32 reg;
@@ -3491,6 +3506,7 @@ static enum dvbfe_search stv090x_search(struct 
dvb_frontend *fe)
                state->search_range = 5000000;
        }
 
+       stv090x_set_pls(state, props->scrambling_sequence_index);
        stv090x_set_mis(state, props->stream_id);
 
        if (stv090x_algo(state) == STV090x_RANGEOK) {
-- 
2.1.4