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[Jesse Sung <1520147@xxxxxxxxxxxxxxxxxx>]

The tool for loading firmware expects an USB serial port to work on.

When the module is in firmware loading mode, it would become
Bus 001 Device 010: ID 058b:0041 Infineon Technologies

After adding this ID to usb-serial-simple,
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 480M
    |__ Port 4: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
        |__ Port 1: Dev 10, If 0, Class=Communications, Driver=, 480M
        |__ Port 1: Dev 10, If 1, Class=CDC Data, Driver=usb_serial_simple, 480M

And a /dev/ttyUSBn would be created.

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https://bugs.launchpad.net/bugs/1520147

Title:
  Support firmware update interface of WWAN module

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Vivid:
  New

Bug description:
  Bus 001 Device 005: ID 413c:81ba Dell Computer Corp.

  Need to use usb-serial-simple instead of acm when the module is in
  firmware loading mode.

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