From Julien on Hackaday.io:

FPGA eink controller

ice40 FPGA based custom board to control eink display

The design files and source code are available on GitHub:

julbouln/ice40_eink_controller

julbouln has shared the board on OSH Park:

eink controller

Here is a video of the project in action:

Test with a homemade WIP epub reader, using ifusb interface ~ 1 fps