Stallion intelligent multiport serial boards IOCTLs  [include/linux/cdk.h]

STL_BINTR *to be documented*
STL_BSTART *to be documented*
STL_BSTOP *to be documented*
STL_BRESET *to be documented*
STL_GETPFLAG *to be documented*
STL_SETPFLAG *to be documented*