diff options
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/dvb/frontends/stv0297.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/drivers/media/dvb/frontends/stv0297.c b/drivers/media/dvb/frontends/stv0297.c index 17e5cb561cd..7c23775f77d 100644 --- a/drivers/media/dvb/frontends/stv0297.c +++ b/drivers/media/dvb/frontends/stv0297.c @@ -358,11 +358,23 @@ static int stv0297_read_ber(struct dvb_frontend *fe, u32 * ber) static int stv0297_read_signal_strength(struct dvb_frontend *fe, u16 * strength) { struct stv0297_state *state = fe->demodulator_priv; - u8 STRENGTH[2]; - - stv0297_readregs(state, 0x41, STRENGTH, 2); - *strength = (STRENGTH[1] & 0x03) << 8 | STRENGTH[0]; - + u8 STRENGTH[3]; + u16 tmp; + + stv0297_readregs(state, 0x41, STRENGTH, 3); + tmp = (STRENGTH[1] & 0x03) << 8 | STRENGTH[0]; + if (STRENGTH[2] & 0x20) { + if (tmp < 0x200) + tmp = 0; + else + tmp = tmp - 0x200; + } else { + if (tmp > 0x1ff) + tmp = 0; + else + tmp = 0x1ff - tmp; + } + *strength = (tmp << 7) | (tmp >> 2); return 0; } |