Instead of trying to stuff everything into the mode bitfield it
turns out it's just easier, clearer, and simpler to use different
values for each of the following:
1) the device's supported access technologies and allowed modes
2) the device's current access technology
3) the device's allowed mode preference
Since none of the AccessTechnology or AllowedMode stuff has hit a
release yet, let's make sure we're doing it the right way early on.
AccessTechnology takes over half of what NetworkMode was supposed to
do, but we'll keep NetworkMode around for a while for compatibility
anyway. Create async updaters that subclasses can use to update
the access tech when they get unsolicited messages.
First, generically handle registration polling if the device does
not support unsolicited registration. Second, using the new
creg/cgreg parsing functions from mm-modem-helpers.c, handle
CREG=2 unsolicited registration replies to capture the GSM LAC/CI
for the location information API.
Because of these changes we can simplify the registration polling
during connection as well by using the common registration parsing
code and the cached registration state.
For QCDM devices we want most of what MMSerialPort does, but not
the AT command handling stuff since the commands and responses
aren't AT commands nor are they even strings. So convert everything
that MMSerialPort does into a GByteArray, and let MMAtSerialPort
handle the conversion to strings when necessary.
Dan Williams