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Finn Thain authored
Introduce some helpers for handling the signalling between VIA and Cuda. This abstraction will be used to add support for Egret devices, which utilize slightly different signalling. Don't invert the sense of the Cuda's active-low signals when storing them in the 'status' variable. Just assert, negate and test those signals using the helpers. The state machine does not need to test its own output signals to figure out what to do next: the next state depends on the Cuda's TREQ output. Just call the TREQ_asserted() helper function to test for that. Similarly, there is no need to store pin directions in the 'status' variable. That was only useful for debugging messages. Tested-by:
Stan Johnson <userm57@yahoo.com> Signed-off-by:
Finn Thain <fthain@telegraphics.com.au> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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