drivers: add initial Samsung 730B image driver

Browse source

Add an experimental driver for the Samsung 730B USB fingerprint sensor
(04e8:730b).

The implementation is based on reverse engineering of the Windows traffic
and a Python prototype:
- repo: https://github.com/lignah/samsung-730b-reverse
- script: scripts/samsung_730b_v1_3.py

Implemented pieces:
- device init sequence (0xC3 control + A9/A8 bulk writes)
- image capture using 0xCA control and 256-byte bulk chunks
- image layout: 112x96 at offset 180 in the raw buffer
- basic image-based finger detection (short probe + ff ratio heuristic)

The driver currently exposes the device as a press-type image sensor and
can capture usable fingerprints via libfprint.

Known limitations:
- Finger detection and capture work, but fprintd enrollment UX is still
  rough (minutiae detection sometimes fails, and higher-level behavior
  needs tuning).
- The driver is marked experimental on purpose; further iteration with
  libfprint/fprintd maintainers is expected.

...

This commit is contained in:

lignah 2025-12-07 15:59:11 +09:00

parent 063830777f

commit fbaa97eaeb

1 changed files with 561 additions and 462 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Show stats Download patch file Download diff file Expand all files Collapse all files

1023

libfprint/drivers/samsung730b.c

View file

File diff suppressed because it is too large Load diff