openwifi provides an open-source full stack real time SDR (Software Defined Radio) Wi-Fi implementation on FPGA with embedded ARM Linux. It is compatible with Linux mac80211 SoftMAC framework, so it supports standard Linux Wi-Fi tools and communication with commercial Wi-Fi devices. The SDR approach makes the design very flexible for changing frequency, bandwidth, mode, etc. The solution is ideal for prototyping special demanding use cases with very sophisticated requirements which cannot be met by off-the-shelf chips.

Find more details here: https://github.com/open-sdr/openwifi