The Fujitsu SP scanner Linux drivers released today are 32-bit and 64-bit binaries spun for Ubuntu 14.04/16.04 LTS and no sign of any source code nor does the README mention anything aside from the binary blobs that are behind an EULA barrier.
Fujitsu said in the press release they sent over this morning about their decision of Linux scanner support:
“With the popularity of Linux on standard desktop computers increasing and an increasing number of smart devices being based on Linux derivatives, our support of this platform with a dedicated driver is a logical step”, says Klaus Schulz, Senior Manager Product Marketing at PFU (EMEA) Limited. “Once again we are putting the focus on evolving customer requirements and the product developments that go with it.”
The Ubuntu scanner driver builds can be found here. The Debian packages for the driver provide a pfuspscanmanager binary, some custom libfpuimgproc2 libraries, and some libsane libraries spun with the PFU SP support.