z8530_rx(9)
NAME
z8530_rx - Handle a PIO receive event
SYNOPSIS
void z8530_rx(struct z8530_channel * c);
ARGUMENTS
- c
- Z8530 channel to process
DESCRIPTION
Receive handler for receiving in PIO mode. This is much like the async
one but not quite the same or as complex
NOTE
Its intended that this handler can easily be separated from the main
code to run realtime. Thatīll be needed for some machines (eg to ever
clock 64kbits on a sparc ;)).
The RT_LOCK macros donīt do anything now. Keep the code covered by them
as short as possible in all circumstances - clocks cost baud. The
interrupt handler is assumed to be atomic w.r.t. to other code - this
is true in the RT case too.
We only cover the sync cases for this. If you want 2Mbit async do it
yourself but consider medical assistance first. This non DMA
synchronous mode is portable code. The DMA mode assumes PCI like ISA
DMA
Called with the device lock held
AUTHOR
- Alan Cox <alan@redhat.com>
- Author.