The ModemManager1.Sim.PreferredNetworks property contains the preferred
networks (and access technologies, if available) configured to the
SIM card.
This commit implements preferred networks reading with AT+CPOL.
SIMs can be created with an EID fetched during load_sim_slots
while initializing the modem, if present.
Since load_eid would be implemented with the same mechanism
we avoid using it here (if Get Slot Status fails once, it
probably doesn't make a lot of sense to try it again).
Before attempting to load any SIM property value, allow checking
whether the SIM is ready for operation or not.
This action is implicitly done by the "unlock required check" step
that is triggered before initializing the primary SIM card, but it
would not be done when initializing other available SIM cards.
The default SIM creation method will attempt to initialize the SIM
properties during the object creation.
This new method allows creating SIM objects with already known
property values, and therefore not explicitly running the
asynchronous initialization process.
This new property helps us identify in which SIM slot the SIM card is
inserted, when multiple slots are available, in the [1,N] range.
For the single-SIM systems this value will always be '0'.
This property is not publicly exposed in DBus, it is considered an
implementation detail.
When transitioning between power-low and power-on modes, Telit modems
switch the SIM off/on, which leads to the emission of #QSS unsolicited not
related to actual SIM swaps.
To handle this #QSS unsolicited, this patch:
* disables reacting on #QSS unsolicited when modem_power_down is received
* implements modem_after_power_up that:
- checks whether the SIM has been changed, matching cached SIM
Identifier with the value in the current SIM. If SIM Identifier,
is different, sim hot swap ports detected is called.
- re-enables reacting on #QSS unsolicited
Aleksander Morgado
Aleksander Morgado
Teijo Kinnunen
Eric Caruso
Carlo Lobrano