[Linux-parport] usblp ioctl's

[ST]

Hi

Does anybody has a pointer to some documentation of the usblp ioctls. I would 
like to switch an usb-to-lp adapter cable to spp mode. The kernel source 
doesn't help me, since i don't know how to infer the ioctl nr and i am 
missing a decription of the functionality of these ioctls in the kernel 
source.

Also if someone has a suggestion what magic input pins (ack, busy etc. ) need 
to be set that a "echo 'this is some long text' >/dev/usb/lp1" writes to the 
port? 

I am trying to fill a register attached to the parallel port with values.

Thanks
ST