Fingerprint Driver - Cs9711

The Chipsailing CS9711 fingerprint driver is an experimental driver for a common biometric sensor found in affordable USB fingerprint dongles (like the WA28) and devices like the GPD Win Max 2 (2023). Key Driver Details

Optimization: Use SPI DMA transfers for all rows in one transaction if the chip supports burst read from a start address. cs9711 fingerprint driver

Method 1: Using Windows Update (Safest)

Microsoft maintains a catalog of third-party drivers. For many CS9711 variants, an automatic update exists. The Chipsailing CS9711 fingerprint driver is an experimental

Error 4: "No supported fingerprint sensor found" in Windows Hello setup

Fix:

• Parse device tree/ACPI for pins, bus parameters, GPIOs, regulators, IRQ, properties (resolution, SPI speed).
• Enable regulators, configure clocks, deassert reset.
• Initialize SPI/I²C: set bits-per-word, mode, max_speed_hz.
• Register input/event device or character device and fingerprint-specific subsystems (e.g., fpc_tee or FPRINT integration).
• Allocate DMA/CMA buffers for image frames.

• CS9711 Fingerprint Reader
• Unknown USB device (Device Descriptor Request Failed)
• Biometric Device > CS9711