Sources:
https://community.cypress.com/
https://github.com/openwrt/cypress-nvram
https://github.com/RPi-Distro/firmware-nonfree/
https://archive.raspberrypi.org/debian/pool/main/b/bluez-firmware/
https://archive.raspberrypi.org/debian/pool/main/f/firmware-nonfree/