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authorAntti Palosaari <crope@iki.fi>2014-09-07 11:20:34 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-06-05 06:33:45 -0300
commit2f1ea29fca781b8e6600f3ece1f2dd98ae276294 (patch)
treeeaf09a994c491268efcd9852c4dae07c1c7c8b49 /drivers/media/tuners
parentd2b72f6482b9a3c57f036c11786a2489dcc81176 (diff)
[media] si2157: implement signal strength stats
Implement DVBv5 signal strength stats. Returns dBm. Signed-off-by: Antti Palosaari <crope@iki.fi> Tested-by: Adam Baker <linux@baker-net.org.uk> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/tuners')
-rw-r--r--drivers/media/tuners/si2157.c40
-rw-r--r--drivers/media/tuners/si2157_priv.h1
2 files changed, 40 insertions, 1 deletions
diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c
index cdaf68781a2e..a6245ef379c4 100644
--- a/drivers/media/tuners/si2157.c
+++ b/drivers/media/tuners/si2157.c
@@ -79,6 +79,7 @@ static int si2157_init(struct dvb_frontend *fe)
{
struct i2c_client *client = fe->tuner_priv;
struct si2157_dev *dev = i2c_get_clientdata(client);
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret, len, remaining;
struct si2157_cmd cmd;
const struct firmware *fw;
@@ -201,9 +202,14 @@ skip_fw_download:
dev->fw_loaded = true;
warm:
+ /* init statistics in order signal app which are supported */
+ c->strength.len = 1;
+ c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ /* start statistics polling */
+ schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(1000));
+
dev->active = true;
return 0;
-
err_release_firmware:
release_firmware(fw);
err:
@@ -222,6 +228,9 @@ static int si2157_sleep(struct dvb_frontend *fe)
dev->active = false;
+ /* stop statistics polling */
+ cancel_delayed_work_sync(&dev->stat_work);
+
/* standby */
memcpy(cmd.args, "\x16\x00", 2);
cmd.wlen = 2;
@@ -360,6 +369,34 @@ static const struct dvb_tuner_ops si2157_ops = {
.get_if_frequency = si2157_get_if_frequency,
};
+static void si2157_stat_work(struct work_struct *work)
+{
+ struct si2157_dev *dev = container_of(work, struct si2157_dev, stat_work.work);
+ struct dvb_frontend *fe = dev->fe;
+ struct i2c_client *client = fe->tuner_priv;
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ struct si2157_cmd cmd;
+ int ret;
+
+ dev_dbg(&client->dev, "\n");
+
+ memcpy(cmd.args, "\x42\x00", 2);
+ cmd.wlen = 2;
+ cmd.rlen = 12;
+ ret = si2157_cmd_execute(client, &cmd);
+ if (ret)
+ goto err;
+
+ c->strength.stat[0].scale = FE_SCALE_DECIBEL;
+ c->strength.stat[0].svalue = (s8) cmd.args[3] * 1000;
+
+ schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
+ return;
+err:
+ c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+}
+
static int si2157_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -384,6 +421,7 @@ static int si2157_probe(struct i2c_client *client,
dev->chiptype = (u8)id->driver_data;
dev->if_frequency = 5000000; /* default value of property 0x0706 */
mutex_init(&dev->i2c_mutex);
+ INIT_DELAYED_WORK(&dev->stat_work, si2157_stat_work);
/* check if the tuner is there */
cmd.wlen = 0;
diff --git a/drivers/media/tuners/si2157_priv.h b/drivers/media/tuners/si2157_priv.h
index 71a5f8c389de..ecc463db8f69 100644
--- a/drivers/media/tuners/si2157_priv.h
+++ b/drivers/media/tuners/si2157_priv.h
@@ -30,6 +30,7 @@ struct si2157_dev {
u8 chiptype;
u8 if_port;
u32 if_frequency;
+ struct delayed_work stat_work;
};
#define SI2157_CHIPTYPE_SI2157 0

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