There is no limitation here. As I said earlier there is a working driver. Taking into account the closedness of the Linux driver and its messiness, Nokia are unwilling to release it as it's not stable = bad publicity (that's my take on what we discussed anyway).

I had hoped that developers would be able to obtain this buggy driver after signing a "we know that it will make everything crash but we still want it, please" disclaimer, but it appears this will probably not happen. I don't know why.