Apparently, the source code and other relevant materials, are not meant to be released to public or to be distributed to others since these are considered confidential materials and proprietary format. In other words, these files are not meant to be shared with other parties or individuals.
Moreover, revising the source code, modifying it to include firmware requests, fixing known bugs, testing them to make sure they work fine, and so on would take a lot of time of effort. It's not a one-day or a one-week thing, as it will take some time to be able to continually update the codes and improve them.
Thank you for your understanding.