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chromium / chromiumos / third_party / modemmanager-next / 6e1670129fbb01c000aeaf3ca761771a12f7fb23
commit6e1670129fbb01c000aeaf3ca761771a12f7fb23[log] [tgz]
authorAleksander Morgado <aleksandermj@google.com>Tue Jun 17 22:38:31 2025
committerChromeos LUCI <chromeos-scoped@luci-project-accounts.iam.gserviceaccount.com>Fri Jun 27 19:55:24 2025
treef16938b90d297c70ae3a7f0fa2dc3730cf84d205
parent42523e97bd047db9df55503e4383b67914d9fab4 [diff]
UPSTREAM: fibocom: setup several +SIM URCs as hotplug event indications

Treat the following URCs as indications of possible SIM hot swap
events:
  +SIM: Inserted
  +SIM: Removed
  +SIM DROP

Any time any of these is received, a SIM hot swap event is reported,
and the logic can then determine what to do. These should lead to
doing nothing if they happen as part of a controlled SIM slot switch.

Signed-off-by: Aleksander Morgado <aleksandermj@google.com>
(cherry picked from commit a24b60e52e390d7a7332f5270ba8e3cfd8d2ba61)

BUG=b:422083198
TEST=Manual tests switching SIM slots

Change-Id: I9e5a586efbd026a024408b86ae97c4f2637cb20a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/modemmanager-next/+/6672870
Reviewed-by: Ujjwal Pande <ujjwalpande@google.com>
Commit-Queue: Aleksander Morgado <aleksandermj@google.com>
Tested-by: Aleksander Morgado <aleksandermj@google.com>
6 files changed
tree: f16938b90d297c70ae3a7f0fa2dc3730cf84d205
  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...).

Getting Started

ModemManager uses the meson build system. Meson is likely available as a package from your Linux distribution, but if not please refer to the Meson project for installation instructions. Once you have Meson installed you'll probably want to install libmbim and libqmi which most modems require.

After dependencies are installed you can build ModemManager with:

$ meson setup build --prefix=/usr --buildtype=release
$ ninja -C build

And after a successful build, install with:

$ sudo ninja -C build install

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+ (See COPYING). The libmm-glib library and the ModemManager API headers are LGPLv2+ (See COPYING.LIB).

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