| The Linux 2.4 Parallel Port Subsystem | ||
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device number
pointer to storage for parallel port number
pointer to storage for multiplexor port number
pointer to storage for daisy chain address
This function converts a device number into its coordinates in terms of which parallel port in the system it is attached to, which multiplexor port it is attached to if there is a multiplexor on that port, and which daisy chain address it has if it is in a daisy chain.
The caller must allocate storage for parport, mux, and daisy.
If there is no device with the specified device number, -ENXIO is returned. Otherwise, the values pointed to by parport, mux, and daisy are set to the coordinates of the device, with -1 for coordinates with no value.
This function is not actually very useful, but this interface was suggested by IEEE 1284.3.
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