Wacom W9021 Pen Digitizer Driver for Windows

KMDF HID miniport driver for Wacom W9021 (I2C) EMR pen digitizer, ported from the Samsung SM-T733 Android kernel driver.

Based on the SynapticsTouch driver skeleton from Windows Driver Samples.

Hardware

• Wacom W9021 EMR pen digitizer (I2C)
• Tested on Samsung Galaxy Tab S7 FE Wi-Fi (SM-T733)

Features

• Pen coordinates, pressure, tilt (X/Y)
• Tip switch, barrel switch (side button), eraser/invert
• Configurable coordinate transform (x_invert, y_invert, xy_switch)
• Palm rejection via shared kernel event (WacomPenActive) — signals the touch driver to suppress finger input when pen is in range