A temporary file is used to download the GNSS assistance data.
It's created and truncated at initialization, but not truncated
when a re-upload is necessary (when data expires).
This causes to corrupt the GNSS assistance data if the new downloaded
data is smaller than the previous download.
ModemManager Location service is only available after SIM unlock
and network registration.
Track service separately to avoid an assert error and crashes.
GNSS assistance data is uploaded when the service becomes available.
Automatically fetch the GNSS assistance data from the Web
to heavily reduce the time to acquire a GNSS lock by uploading
the assistance data to the modem.
This feature is optional and can be disabled in the configuration
as people may prefer to not download the assistance data from
the Quectel/Qualcomm servers.
Also configure the GNSS engine to optimize the performance
and power consumption.
Allow the modem to enter soft sleep when
we don't talk to the modem using AT commands.
This was already the case in suspend, but
not during runtime. By only waking the modem
from soft sleep when we need to send
an AT command, we can save some power.
This brings the power on sequence in line with the EG25-G Hardware Design
datasheet, which states we need to wait at least 30 ms after VBAT becomes stable
before pulling PWRKEY low (first action of the power on sequene).
After this change the sequence becomes as follows:
- Set RESET_N high
- Wait 60 ms (double 30 ms)
- Execute PWRKEY sequence
60 ms was choosen because we don't know when VBAT becomes stable, but it should
be much less than an additional 30 ms. Empirical evidence suggests PinePhone
units with a healthy battery do not see serious side effects from not doing
this, while the modem will fail to boot and/or throw random errors on boot with
a worn out battery.
The AT commands list for each stage is now configured per-device, as
well as the UART port to be used.
As this list can be changed by the user, there is no more need for a
special GNSS-related option
The need to use libusb to check for the modem state on startup now
depends on a config option, instead of the device type. The USB PID and
VID are moved to config as well.
This commit prepares the use of device-specific configuration files.
These files should be named after the device-tree `compatible` string
with the `toml` extension.
`eg25-manager` will search for config files in
`<prefix>/etc/eg25-manager` first (or `/etc/eg25-manager` if prefix is
`/usr`), then in `<prefix>/share/eg25-manager`.
The EG25 modem needs at least 2 minutes after indicating 'RDY'
to be fully operational. If the modem is suspended before that,
calls or texts may not be seen by the userspace.
This mostly occurs when a full reboot or poweroff/poweron
sequence of the phone is performed.
:
There's no reason we should wait 3s before retrying a failed AT command.
This can even cause issues with suspend inhibition: 3 retries of a
failed command would take 9s, while logind ignores the inhibitor after
only 5s.
Reducing the delay to 500ms should be enough and wouldn't interfere with
suspend inhibition.
Fixes#3
Most of the modem issues follow a (incomplete) USB device reset. Instead
of relying solely on the existing timer, this patch adds a udev monitor
which resets the modem as soon as its associated USB device is reset,
which greatly improves recovery time.
This patch adds a 3s delay when resetting the modem during which we
avoid triggering a new reset. This makes sure we don't trigger a reset
twice in a row.
It also disables any related running timer to avoid being re-triggered
unnecessarily.
