diff options
| author | Antti Palosaari <crope@iki.fi> | 2014-09-07 16:20:34 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-06-05 11:33:45 +0200 |
| commit | 2f1ea29fca781b8e6600f3ece1f2dd98ae276294 (patch) | |
| tree | eaf09a994c491268efcd9852c4dae07c1c7c8b49 /drivers/media | |
| parent | [media] si2168: Implement own I2C adapter locking (diff) | |
| download | linux-2f1ea29fca781b8e6600f3ece1f2dd98ae276294.tar.xz linux-2f1ea29fca781b8e6600f3ece1f2dd98ae276294.zip | |
[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')
| -rw-r--r-- | drivers/media/tuners/si2157.c | 40 | ||||
| -rw-r--r-- | drivers/media/tuners/si2157_priv.h | 1 |
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 |