Hi,
You can find Mifare Desfire support inside the NFC Reader Library [1]. One of the example projects shows how to read an NDEF message stored on a Mifare Desfire card.
The public version of the NFC Reader Library [1] allows you to use the Mifare Desfire card like a standard NFC Forum Type 4 Tag. Including support for read and write operation. If you need support for the full feature set of Mifare Desfire, you need to get it via the NXP Docstore [2] which requires an NDA to be in place.
On the NFC Reader Library web page [1] you will also find a version for Linux.
The software for the EXPLORE-NFC [3] contains an example application for reading and writing Mifare Desfire cards.
HTH,
Michael
[1] http://www.nxp.com/pages/:NFC-READER-LIBRARY
[2] NXP DocStore
[3] Neard EXPLORE-NFC – Using NeardAL with EXPLORE-NFC. This package contains all software packages to g...