FwupdPlugin – 1.0: Plugin: ModemManager
Description: Reference for FwupdPlugin-1.0: Plugin: ModemManager

## Introduction

This plugin adds support for devices managed by ModemManager.

## GUID Generation

These device use the ModemManager “Firmware Device IDs” as the GUID, e.g.

- `USB\VID_413C&PID_81D7&REV_0318&CARRIER_VODAFONE`
- `USB\VID_413C&PID_81D7&REV_0318`
- `USB\VID_413C&PID_81D7`
- `USB\VID_413C`
- `PCI\VID_105B&PID_E0AB&REV_0000&CARRIER_VODAFONE`
- `PCI\VID_105B&PID_E0AB&REV_0000`
- `PCI\VID_105B&PID_E0AB`
- `PCI\VID_105B`
- `PCI\VID_1EAC&PID_1001`
- `PCI\VID_1EAC&PID_1002`
- `PCI\VID_1EAC`

## Quirk Use

This plugin uses the following plugin-specific quirk:

### ModemManagerBranchAtCommand

AT command to execute to determine the firmware branch currently installed on the modem.

Since: 1.7.4

### ModemManagerFirehoseProgFile

Firehose program file to use during the switch to EDL (Emergency Download) mode.

Since: 1.8.10

## Vendor ID Security

The vendor ID is set from the USB or PCI vendor, for example `USB:0x413C` `PCI:0x105B`

## Update method: fastboot

If the device supports the ‘fastboot’ update method, it must also report which AT command should be used to trigger the modem reboot into fastboot mode.

Once the device is in fastboot mode, the firmware upgrade process will happen as defined e.g. in the ‘flashfile.xml’ file. Every file included in the CAB that is not listed in the associated ‘flashfile.xml’ will be totally ignored during the fastboot upgrade procedure.

Update Protocol: `com.google.fastboot`

For this reason the `REPLUG_MATCH_GUID` internal device flag is used so that the fastboot and runtime modes are treated as the same device.

## Update method: qmi-pdc

If the device supports the ‘qmi-pdc’ update method, the contents of the CAB file should include files named as ‘mcfg.*.mbn’ which will be treated as MCFG configuration files to download into the device using the Persistent Device Configuration QMI service.

If a device supports both ‘fastboot’ and ‘qmi-pdc’ methods, the fastboot operation will always be run before the QMI operation, so that e.g. the full partition where the MCFG files are stored can be wiped out before installing the new ones.

Update protocol: `com.qualcomm.qmi_pdc`

For this reason the `REPLUG_MATCH_GUID` internal device flag is used so that the fastboot and runtime modes are treated as the same device.

## Update method: mbim-qdu

If the device supports the ‘mbim-qdu’ update method, the contents of the CAB file should include a package named as ‘Firmware_*.7z’ which is a compressed ota.bin file that will be downloaded to the ota partition of the device.

Update protocol: `com.qualcomm.mbim_qdu`

## Update method: firehose

If the device supports the ‘firehose’ update method, it should have QCDM port exposed and the contents of the CAB file should contain ‘firehose-rawprogram.xml’. The device is then switched to the emergency download mode (EDL) and flashed with files described in ‘firehose-rawprogram.xml’.

Update protocol: `com.qualcomm.firehose`

## External Interface Access

This plugin requires read/write access to `/dev/bus/usb` and `/dev/bus/pci`.