Recent Dell laptops - i.e. E7470 - contain integrated Broadcom NFC (contactless), (contacted) chip card and fingerprint reader (USB 0a5c:5834 - Broadcom BCM5880 USH).
The contacted card reader works out of the box on Linux, yet NFC reader does not - no RF field is present.
Instructions from blog.g3rt.nl are not applicable: the ushdiag.exe does not recognize the device at all.
This project aims to enable Linux to read NFC cards the same way Windows does.
./bcm20795.py on (use sudo if necessary).pcsc_scan or whatever you prefer.To disable the reader replace on with off.
Currently only the following devices were tested and are known to work:
0a5c:58340a5c:5832Firmware update (done during driver installation on Windows) may be required.
0a5c:5832)Python script sends the same sequence of commands the Windows driver does. The traffic was sniffed using USBPcap and Wireshark (kudos to ~jkramarz for that).
The data is sent as-is and responses are read, but no error-checking is done.
The semi-annotated traffic dump is available as traffic.txt - feel free to decode it further!
The communication protocol is based on NCI (NFC Controller Interface). Unfortunately the specs are not freely available and some proprietary extensions are used. libnfc-nci and kernel sources were used to decode some structs.