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authorMauro Carvalho Chehab <mchehab@redhat.com>2012-07-04 02:33:55 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-07-04 02:46:58 -0300
commit1d432a3d7783b0b86ff08a111b7a4bea550fc4a2 (patch)
treee92473488d7674c171f6d7fa59da4186a7e6044b
parent90acb85fb48372f30e0a2f6d516d2285faea6e6c (diff)
[media] tuner, xc2028: add support for get_afc()
Implement API support to return AFC frequency shift, as this device supports it. The only other driver that implements it is tda9887, and the frequency there is reported in Hz. So, use Hz also for this tuner. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
-rw-r--r--drivers/media/common/tuners/tuner-xc2028.c46
-rw-r--r--drivers/media/dvb/dvb-core/dvb_frontend.h1
-rw-r--r--drivers/media/video/tuner-core.c11
3 files changed, 57 insertions, 1 deletions
diff --git a/drivers/media/common/tuners/tuner-xc2028.c b/drivers/media/common/tuners/tuner-xc2028.c
index 42fdf5c5709..4857e86259a 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,
};
diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.h b/drivers/media/dvb/dvb-core/dvb_frontend.h
index e929d5697b8..7c64c09103a 100644
--- a/drivers/media/dvb/dvb-core/dvb_frontend.h
+++ b/drivers/media/dvb/dvb-core/dvb_frontend.h
@@ -220,6 +220,7 @@ struct dvb_tuner_ops {
#define TUNER_STATUS_STEREO 2
int (*get_status)(struct dvb_frontend *fe, u32 *status);
int (*get_rf_strength)(struct dvb_frontend *fe, u16 *strength);
+ int (*get_afc)(struct dvb_frontend *fe, s32 *afc);
/** These are provided separately from set_params in order to facilitate silicon
* tuners which require sophisticated tuning loops, controlling each parameter separately. */
diff --git a/drivers/media/video/tuner-core.c b/drivers/media/video/tuner-core.c
index 98adeeebb8b..b5a819af2b8 100644
--- a/drivers/media/video/tuner-core.c
+++ b/drivers/media/video/tuner-core.c
@@ -228,6 +228,16 @@ static int fe_has_signal(struct dvb_frontend *fe)
return strength;
}
+static int fe_get_afc(struct dvb_frontend *fe)
+{
+ s32 afc = 0;
+
+ if (fe->ops.tuner_ops.get_afc)
+ fe->ops.tuner_ops.get_afc(fe, &afc);
+
+ return 0;
+}
+
static int fe_set_config(struct dvb_frontend *fe, void *priv_cfg)
{
struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
@@ -247,6 +257,7 @@ static struct analog_demod_ops tuner_analog_ops = {
.set_params = fe_set_params,
.standby = fe_standby,
.has_signal = fe_has_signal,
+ .get_afc = fe_get_afc,
.set_config = fe_set_config,
.tuner_status = tuner_status
};