Driver for FocalTech 2808:9e65 fingerprint reader

Setup with libfprint

1. Clone libfprint repository:

   git clone --depth 1 https://gitlab.freedesktop.org/libfprint/libfprint.git
   cd libfprint

2. Copy the driver files to libfprint:

   cp ../driver/focaltech.c libfprint/drivers/
   cp ../driver/focaltech.h libfprint/drivers/

3. Update libfprint/meson.build to include the new driver in the default_drivers list:

   default_drivers = [
       ...
       'focaltech_moc',
       'focaltech',
   ]

4. Add focaltech to the endian_independent_drivers list in libfprint/meson.build:

   endian_independent_drivers = virtual_drivers + [
       ...
       'focaltech_moc',
       'focaltech',
       'nb1010',
       ...
   ]

5. Update libfprint/libfprint/meson.build to add the driver source:

   driver_sources = {
       ...
       'focaltech_moc' :
           [ 'drivers/focaltech_moc/focaltech_moc.c' ],
       'focaltech' :
           [ 'drivers/focaltech.c' ],
   }

6. Build and install libfprint (important: use --prefix=/usr to install to /usr instead of /usr/local):

   meson setup build --prefix=/usr
   meson compile -C build
   sudo meson install -C build

7. Restart fprintd service to use the new library:

   sudo systemctl restart fprintd

8. Verify the device is detected:

   fprintd-list $USER

   You should see output like:

   found 1 devices
   Device at /net/reactivated/Fprint/Device/0
   Using device /net/reactivated/Fprint/Device/0
   Fingerprints for user YOUR_USERNAME on Focaltech Fingerprint Sensor (press):
   

Usage

After setup, you can use these commands:

• fprintd-enroll - Enroll new fingerprints
• fprintd-list $USER - List enrolled fingerprints
• fprintd-verify - Test fingerprint verification
• fprintd-delete $USER - Remove enrolled fingerprints

Notes

• Libfprint uses meson for building. See the Meson wiki for more details.
• The --prefix=/usr flag is crucial for fprintd to find the library. Without it, libfprint installs to /usr/local by default, which fprintd doesn't search.