diff options
| author | Michael Krufky <mkrufky@linuxtv.org> | 2007-08-31 16:39:39 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2007-10-09 22:07:45 -0300 |
| commit | 735f0b9af1748602bb7f3a8009c31cf5f133eec8 (patch) | |
| tree | 101e80cb5bbea411baedc57954e38f45a90c5c66 /drivers/media/video/tuner-simple.c | |
| parent | 8fb3b9f7a9e0420150bf6cb8a3c20f45d372cce4 (diff) | |
V4L/DVB (6137): tuner-simple: add get_rf_strength and improve status reading efficiency
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/tuner-simple.c')
| -rw-r--r-- | drivers/media/video/tuner-simple.c | 58 |
1 files changed, 36 insertions, 22 deletions
diff --git a/drivers/media/video/tuner-simple.c b/drivers/media/video/tuner-simple.c index 2dbd91c8cb6..7b93d3b1f4c 100644 --- a/drivers/media/video/tuner-simple.c +++ b/drivers/media/video/tuner-simple.c @@ -102,7 +102,7 @@ struct tuner_simple_priv { /* ---------------------------------------------------------------------- */ -static int tuner_getstatus(struct dvb_frontend *fe) +static int tuner_read_status(struct dvb_frontend *fe) { struct tuner_simple_priv *priv = fe->tuner_priv; unsigned char byte; @@ -113,47 +113,60 @@ static int tuner_getstatus(struct dvb_frontend *fe) return byte; } -static int tuner_signal(struct dvb_frontend *fe) +static inline int tuner_signal(const int status) { - return (tuner_getstatus(fe) & TUNER_SIGNAL) << 13; + return (status & TUNER_SIGNAL) << 13; } -static int tuner_stereo(struct dvb_frontend *fe) +static inline int tuner_stereo(const int type, const int status) { - struct tuner_simple_priv *priv = fe->tuner_priv; - - int stereo, status; - - status = tuner_getstatus(fe); - - switch (priv->type) { + switch (type) { case TUNER_PHILIPS_FM1216ME_MK3: case TUNER_PHILIPS_FM1236_MK3: case TUNER_PHILIPS_FM1256_IH3: case TUNER_LG_NTSC_TAPE: - stereo = ((status & TUNER_SIGNAL) == TUNER_STEREO_MK3); - break; + return ((status & TUNER_SIGNAL) == TUNER_STEREO_MK3); default: - stereo = status & TUNER_STEREO; + return status & TUNER_STEREO; } +} - return stereo; +static inline int tuner_islocked(const int status) +{ + return (status & TUNER_FL); +} + +static inline int tuner_afcstatus(const int status) +{ + return (status & TUNER_AFC) - 2; } static int simple_get_status(struct dvb_frontend *fe, u32 *status) { struct tuner_simple_priv *priv = fe->tuner_priv; - int signal = tuner_signal(fe); + int tuner_status = tuner_read_status(fe); *status = 0; - if (signal) + if (tuner_islocked(tuner_status)) *status = TUNER_STATUS_LOCKED; - if (tuner_stereo(fe)) + if (tuner_stereo(priv->type, tuner_status)) *status |= TUNER_STATUS_STEREO; - tuner_dbg("tuner-simple: Signal strength: %d\n", signal); + tuner_dbg("AFC Status: %d\n", tuner_afcstatus(tuner_status)); + + return 0; +} + +static int simple_get_rf_strength(struct dvb_frontend *fe, u16 *strength) +{ + struct tuner_simple_priv *priv = fe->tuner_priv; + int signal = tuner_signal(tuner_read_status(fe)); + + *strength = signal; + + tuner_dbg("Signal strength: %d\n", signal); return 0; } @@ -580,9 +593,10 @@ static int simple_get_frequency(struct dvb_frontend *fe, u32 *frequency) static struct dvb_tuner_ops simple_tuner_ops = { .set_analog_params = simple_set_params, - .release = simple_release, - .get_frequency = simple_get_frequency, - .get_status = simple_get_status, + .release = simple_release, + .get_frequency = simple_get_frequency, + .get_status = simple_get_status, + .get_rf_strength = simple_get_rf_strength, }; struct dvb_frontend *simple_tuner_attach(struct dvb_frontend *fe, |