Dell Latitude E5*50 Linux support

Tested on my Dell Latitude E5450 (late 2014) with Fedora 21 64bit

WWAN module

Dell Latitude E5*50 laptops could have a "Dell Wireless 5809e Gobi™ 4G LTE Mobile Broadband Card" WWAN module installed. This WWAN device is based on the Qualcomm Gobi™.

Name	Dell Wireless 5809e Gobi™ 4G LTE Mobile Broadband Card
ID	413c:81b1
Kernel module	qcserial

The device id of this Gobi™ module is still missing from the qcserial devices table, so I created a udev rule which loads the qcserial module, switchs the bConfigurationValue from 2 to 1** and add the new device id 413c:81b1 to the qcserial driver.

** By default the device is loaded in the cdc_mbim mode (see https://www.kernel.org/doc/Documentation/networking/cdc_mbim.txt) instead in the classic serial modem mode.

GPS

To start the GPS

echo "\$GPS_START" > /dev/ttyUSB0

To stop the GPS

echo "\$GPS_STOP" > /dev/ttyUSB0

In the bin folder you can find an utility (gobigps) to easily start and stop the GPS.