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chromium / chromiumos / third_party / modemmanager-next / 464cace5b654b1e2a85db8e9fbe1de0961ff920a
commit464cace5b654b1e2a85db8e9fbe1de0961ff920a[log] [tgz]
authorAleksander Morgado <aleksander@aleksander.es>Tue Apr 09 08:25:04 2024
committerChromeos LUCI <chromeos-scoped@luci-project-accounts.iam.gserviceaccount.com>Wed Apr 10 11:12:20 2024
tree6f47f01f39e4ab5562d71fdb97b07b34d4bd8128
parent036ac9d5b8f92c1ace9ad33050b795754731374a [diff]
UPSTREAM: base-manager: start device support check on first port addition

This avoids the "port in device added after device probing has already
finished" warning, and also the creation of modem objects for single
port devices.

(cherry picked from commit 19da7559c0ea888a8f1b9ad0eb1b77e3f358808f)

BUG=None
TEST=Ensure no warnings during initial device probing

Change-Id: Ie2bf3adf48c6ccd597f92749d7e7b246436e8a56
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/modemmanager-next/+/5440513
Commit-Queue: Aleksander Morgado <aleksandermj@google.com>
Tested-by: Aleksander Morgado <aleksandermj@google.com>
Reviewed-by: Eric Caruso <ejcaruso@chromium.org>
1 file changed
tree: 6f47f01f39e4ab5562d71fdb97b07b34d4bd8128
  1. build-aux/
  2. cli/
  3. data/
  4. docs/
  5. examples/
  6. include/
  7. introspection/
  8. libmm-glib/
  9. libqcdm/
  10. po/
  11. src/
  12. test/
  13. tools/
  14. vapi/
  15. .editorconfig
  16. .gitignore
  17. .gitlab-ci.yml
  18. AUTHORS
  19. COPYING
  20. COPYING.LIB
  21. DIR_METADATA
  22. meson.build
  23. meson_options.txt
  24. NEWS
  25. OWNERS
  26. PRESUBMIT.cfg
  27. README.chromium
  28. README.md
  29. RELEASING
  30. unblocked_terms.txt
README.md

ModemManager

ModemManager provides a unified high level API for communicating with mobile broadband modems, regardless of the protocol used to communicate with the actual device (Generic AT, vendor-specific AT, QCDM, QMI, MBIM...).

Using

ModemManager is a system daemon and is not meant to be used directly from the command line. However, since it provides a DBus API, it is possible to use ‘dbus-send’ commands or the new ‘mmcli’ command line interface to control it from the terminal. The devices are queried from udev and automatically updated based on hardware events, although a manual re-scan can also be requested to look for RS232 modems.

Implementation

ModemManager is a DBus system bus activated service (meaning it's started automatically when a request arrives). It is written in C, using glib and gio. Several GInterfaces specify different features that the modems support, including the generic MMIfaceModem3gpp and MMIfaceModemCdma which provide basic operations for 3GPP (GSM, UMTS, LTE) or CDMA (CDMA1x, EV-DO) modems. If a given feature is not available in the modem, the specific interface will not be exported in DBus.

Plugins

Plugins are loaded on startup, and must implement the MMPlugin interface. It consists of a couple of methods which tell the daemon whether the plugin supports a port and to create custom MMBroadbandModem implementations. It most likely makes sense to derive custom modem implementations from one of the generic classes and just add (or override) operations which are not standard. There are multiple fully working plugins in the plugins/ directory that can be used as an example for writing new plugins. Writing new plugins is highly encouraged! The plugin API is open for changes, so if you're writing a plugin and need to add or change some public method, feel free to suggest it!

License

The ModemManager and mmcli binaries are both GPLv2+. The libmm-glib library is LGPLv2+.

Code of Conduct

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms, which you can find in the following link: https://www.freedesktop.org/wiki/CodeOfConduct

CoC issues may be raised to the project maintainers at the following address: modemmanager-devel-owner@lists.freedesktop.org