Wow OpenCores is being very annoying right now. They won't allow me to
reset my password or create a new account, so I can't download the
files. Their SVN server is also return 502 errors so I can't check it
out that way. The way that I got all of these files was by manually
going to each file in the online SVN viewer and copy and pasting. I hope
I never have to do this agian.

https://opencores.org/projects/sdcard_mass_storage_controller