libfprint-2-tod1-broadcom: init at 5.8.012.0

[totoroot]

Description of changes

This adds another driver for libfprint-2-tod1, which is supposed to be used as Touch OEM Drivers (TOD) package in the NixOS module services.fprintd.tod.driver. This enables fingerprint support for the Dell Latitude 7440 and some other notebook models.

I managed to get the driver running by supplying the needed statically linked libraries, but hit a road block when fprintd tries to load the driver's firmware:

○ fprintd.service - Fingerprint Authentication Daemon
     Loaded: loaded (/etc/systemd/system/fprintd.service; linked; preset: enabled)
    Drop-In: /nix/store/if17mdl7z0j9q27m36z6b0gh4jiipvp2-system-units/fprintd.service.d
             └─overrides.conf
     Active: inactive (dead)
       Docs: man:fprintd(1)

Aug 01 07:49:28 nixos systemd[1]: Starting Fingerprint Authentication Daemon...
Aug 01 07:49:28 nixos fprintd[160929]: In cvif_IsUshThere(), cv_get_ush_ver() status: (0x0)
Aug 01 07:49:28 nixos fprintd[160929]: Control Vault getting chip type
Aug 01 07:49:28 nixos fprintd[160929]: Citadel A0 CID7 Chip Found....
Aug 01 07:49:28 nixos fprintd[160929]: Can not find SBI file (bcmsbiCitadelA0_7.otp)
Aug 01 07:49:28 nixos fprintd[160929]: Missing files necessary for complete firmware update
Aug 01 07:49:28 nixos fprintd[160929]:                 FwUpgradeError. Check Firmware Files or CID used or Hardware etc. Error: 0x1c
Aug 01 07:49:28 nixos fprintd[160929]: Ignoring device due to initialization error: An unspecified error occurred!
Aug 01 07:49:28 nixos systemd[1]: Started Fingerprint Authentication Daemon.
Aug 01 07:50:15 nixos systemd[1]: fprintd.service: Deactivated successfully.

When the package is built, the firmware files are copied to the correct location, but it seems like fprintd cannot find them. Any help would be greatly appreciated!

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.11 Release Notes (or backporting 23.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

[nixos-discourse]

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/need-some-help-getting-a-new-driver-working-for-fprintd/31157/1

[totoroot]

@abbradar Could you provide some insight? I'm only asking since you are listed as the maintainer of libfprint