diff options
Diffstat (limited to 'drivers/media/common')
| -rw-r--r-- | drivers/media/common/tuners/tuner-xc2028.c | 46 |
1 files changed, 45 insertions, 1 deletions
diff --git a/drivers/media/common/tuners/tuner-xc2028.c b/drivers/media/common/tuners/tuner-xc2028.c index 42fdf5c57091..4857e86259a1 100644 --- a/drivers/media/common/tuners/tuner-xc2028.c +++ b/drivers/media/common/tuners/tuner-xc2028.c @@ -924,7 +924,7 @@ static int xc2028_signal(struct dvb_frontend *fe, u16 *strength) msleep(6); } - /* Frequency was not locked */ + /* Frequency didn't lock */ if (frq_lock == 2) goto ret; @@ -947,6 +947,49 @@ ret: return rc; } +static int xc2028_get_afc(struct dvb_frontend *fe, s32 *afc) +{ + struct xc2028_data *priv = fe->tuner_priv; + int i, rc; + u16 frq_lock = 0; + s16 afc_reg = 0; + + rc = check_device_status(priv); + if (rc < 0) + return rc; + + mutex_lock(&priv->lock); + + /* Sync Lock Indicator */ + for (i = 0; i < 3; i++) { + rc = xc2028_get_reg(priv, XREG_LOCK, &frq_lock); + if (rc < 0) + goto ret; + + if (frq_lock) + break; + msleep(6); + } + + /* Frequency didn't lock */ + if (frq_lock == 2) + goto ret; + + /* Get AFC */ + rc = xc2028_get_reg(priv, XREG_FREQ_ERROR, &afc_reg); + if (rc < 0) + return rc; + + *afc = afc_reg * 15625; /* Hz */ + + tuner_dbg("AFC is %d Hz\n", *afc); + +ret: + mutex_unlock(&priv->lock); + + return rc; +} + #define DIV 15625 static int generic_set_freq(struct dvb_frontend *fe, u32 freq /* in HZ */, @@ -1392,6 +1435,7 @@ static const struct dvb_tuner_ops xc2028_dvb_tuner_ops = { .release = xc2028_dvb_release, .get_frequency = xc2028_get_frequency, .get_rf_strength = xc2028_signal, + .get_afc = xc2028_get_afc, .set_params = xc2028_set_params, .sleep = xc2028_sleep, }; |