Add USB PID 0x2020 (NB-2020-U) to the nb1010 driver's id_table.
The NB-2020-U is an embedded variant of the NB-1010-U using an
identical sensor die (confirmed by independent teardown reports from
System Plus Consulting/Yole Group). USB endpoint layout, command
protocol and image format are identical between both devices.
Tested on a Fujitsu notebook with integrated NB-2020-U reader
(USB ID 298d:2020): device enumeration, finger detection polling
and image capture all work correctly with the existing nb1010
driver code.
Signed-off-by: Sebastian van de Meer <kernel-error@kernel-error.com>
Add support for the SecuGen Hamster Pro 20 (1162:2200), a 500 DPI
press-type optical scanner built around the SIDO020A sensor.
The protocol was reverse-engineered from USB packet captures. The
sensor is configured over I2C-tunneled vendor control transfers and
streams 956x688 raw frames over the bulk endpoint, read in 64KB
chunks so the standard pcap-based test tooling can record full
frames (the kernel usbmon interface truncates single URBs at
ring_size/5). Frames are processed with band compensation, an
edge-aware unsharp mask, a fixed-point bilinear downsample to
300x400, flat-field blending and directional sharpening, driven by
per-device factory calibration data read from the device firmware.
The fixed-point pipeline keeps the output bit-identical across
compilers and architectures for the image comparison test.
The sensor has no proximity hardware and its GET_STATUS request
always returns zeros, so finger presence is detected by polling
preview frames and comparing the mean brightness of the central
region against a calibration background frame.
Includes a umockdev capture/replay test with a reference image.
Closes: https://gitlab.freedesktop.org/libfprint/libfprint/-/work_items/353
This FPreader was found on Minisforum X1 Pro MiniPC, and it is
listed by lsusb as "Generic Realtek USB2.0 Finger Print Bridge".
Though the VID is not the same as the well-known "0bda", we can
confirm it's from Realtek by analyzing Windows version driver.
Signed-off-by: Ryan Wong <colorfulshark@gmail.com>
jialei