media: dvb-frontends/stv0910: implement diseqc_send_burst

This implements the diseqc_send_burst frontend op to support sending
mini-DISEQC bursts. Picked up from dddvb's driver package where this
specific block was disabled via #if 0/#endif, but is still working
according to feedback from upstream, so add it.

Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/dvb-frontends/stv0910.c b/drivers/media/dvb-frontends/stv0910.c
index b596ec5f309f4f49c5c8b8a76bb4f8edb4fd4289..17c7170d9db945be397c083b3ebed518cfe3754d 100644 (file)
--- a/drivers/media/dvb-frontends/stv0910.c
+++ b/drivers/media/dvb-frontends/stv0910.c
@@ -1638,6 +1638,27 @@ static int send_master_cmd(struct dvb_frontend *fe,
        return 0;
 }
 
+static int send_burst(struct dvb_frontend *fe, enum fe_sec_mini_cmd burst)
+{
+       struct stv *state = fe->demodulator_priv;
+       u16 offs = state->nr ? 0x40 : 0;
+       u8 value;
+
+       if (burst == SEC_MINI_A) {
+               write_reg(state, RSTV0910_P1_DISTXCFG + offs, 0x3F);
+               value = 0x00;
+       } else {
+               write_reg(state, RSTV0910_P1_DISTXCFG + offs, 0x3E);
+               value = 0xFF;
+       }
+       wait_dis(state, 0x40, 0x00);
+       write_reg(state, RSTV0910_P1_DISTXFIFO + offs, value);
+       write_reg(state, RSTV0910_P1_DISTXCFG + offs, 0x3A);
+       wait_dis(state, 0x20, 0x20);
+
+       return 0;
+}
+
 static int sleep(struct dvb_frontend *fe)
 {
        struct stv *state = fe->demodulator_priv;
@@ -1673,6 +1694,7 @@ static struct dvb_frontend_ops stv0910_ops = {
        .set_tone                       = set_tone,
 
        .diseqc_send_master_cmd         = send_master_cmd,
+       .diseqc_send_burst              = send_burst,
 };
 
 static struct stv_base *match_base(struct i2c_adapter  *i2c, u8 adr)