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.
- Clone the repository.
- Install python3 and python3-usb.
- Run:
./nfc.py on(usesudoif necessary). - Run
pcsc_scanor whatever you prefer. - Enjoy!
To disable the reader replace on with off.
Currently only the following devices were tested and are known to work:
0a5c:5832(ControlVault 2),0a5c:5834(ControlVault 2),0a5c:5842(ControlVault 3).0a5c:5843(ControlVault 3).
Firmware update (done during driver installation on Windows) may be required.
- Dell Latitude 5310 2-in-1
- Dell Latitude 5480
- Dell Latitude 5491
- Dell Latitude 7280
- Dell Latitude 7290
- Dell Latitude 7390
- Dell Latitude 7400
- Dell Latitude E5270
- Dell Latitude E5570
- Dell Latitude E7470
- Dell Latitude E7490
- Dell Latitude Rugged 5414
- Dell Latitude Rugged 5420
Python script sends the same sequence of commands the Windows driver does. The traffic was sniffed using USBPcap and Wireshark (kudos to ~jkramarz and ~lgarbarini and for that).
The data is sent as-is and responses are read, but no error-checking is done.
The semi-annotated traffic dumps are available as traffic_cv2.txt and traffic_cv3.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 vendor-independent structs.
- https://android.googlesource.com/platform/external/libnfc-nci/ - the driver of NFC component (BCM 20795),
- https://blog.g3rt.nl/enable-dell-nfc-contactless-reader.html - this does not work on E7470.
