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path: root/drivers/media/dvb-frontends/m88ds3103.h
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2015-06-10[media] TS2020: Calculate tuner gain correctlyDavid Howells
The TS2020 and TS2022 tuners take an input from the demodulator indicating the AGC setting on that component that is then used to influence the tuner's own gain. This should be taken into account when calculating the gain and signal strength. Further, the existing TS2020 driver miscalculates the signal strength as the result of its calculations can exceed the storage capacity of the 16-bit word used to return it to userspace. To this end: (1) Add a callback function (->get_agc_pwm()) in the ts2020_config struct that the tuner can call to get the AGC PWM value from the demodulator. (2) Modify the TS2020 driver to calculate the gain according to Montage's specification with the adjustment that we produce a negative value and scale it to 0.001dB units (which is what the DVBv5 API will require): (a) Callback to the demodulator to retrieve the AGC PWM value and then turn that into Vagc for incorporation in the calculations. If the callback is unset, assume a Vagc of 0. (b) Calculate the tuner gain from a combination of Vagc and the tuner's RF gain and baseband gain settings. (3) Turn this into a percentage signal strength as per Montage's specification for return to userspace with the DVBv3 API. (4) Provide a function in the M88DS3103 demodulator driver that can be used to get the AGC PWM value on behalf of the tuner. (5) The ts2020_config.get_agc_pwm function should be set by the code that stitches together the drivers for each card. For the DVBSky cards that use the M88DS3103 with the TS2020 or the TS2022, set the get_agc_pwm function to point to m88ds3103_get_agc_pwm. I have tested this with a DVBSky S952 card which has an M88DS3103 and a TS2022. Thanks to Montage for providing access to information about the workings of these parts. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2015-06-10[media] m88ds3103: rename variables and correct loggingAntti Palosaari
Rename driver state from priv to dev. Use I2C client for correct logging. Use adapter and address from I2C client structure where needed. Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2015-05-30[media] m88ds3103: add I2C client bindingAntti Palosaari
Implement I2C client device binding. Wrap media attach to driver I2C probe. Add wrapper from m88ds3103_attach() to m88ds3103_probe() via driver core in order to provide proper I2C client for legacy media attach binding. Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2014-09-02[media] m88ds3103: implement set voltage and TS clocknibble.max
Implement set voltage operation. Separate TS clock as a own configuration parameter. Add TS clock polarity parameter. [crope@iki.fi: merge em28xx driver m88ds3103 config change patch to that one, in order to keep build unbroken] Signed-off-by: Nibble Max <nibble.max@gmail.com> Reviewed-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
2013-12-19[media] m88ds3103: fix some style issues reported by checkpatch.plAntti Palosaari
* remove Free Software Foundation postal address * add one pair of parenthesis * use sizeof(*foo), not sizeof(struct foo) Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
2013-12-19[media] m88ds3103: remove unneeded AGC from inittabAntti Palosaari
Optimal AGC is highly depended on used RF tuner and due to that it is already included to chip configuration. However, inittab has default AGC value, which was later replaced by one from config. Add also comment to all chip configuration options about default values and if those are needed to set or not. Reported-by: David Howells <dhowells@redhat.com> Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
2013-12-19[media] Montage M88DS3103 DVB-S/S2 demodulator driverAntti Palosaari
DVB-S/S2 satellite television demodulator driver. Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>