[parisc-linux] MUX driver for multiple ports (lines)

Christoph Plattner christoph.plattner@gmx.at
Sat, 14 Sep 2002 00:25:10 +0200


Hallo Ryan,

have you already got docu on the serial MUX board ?
Or where do you have the information about `#define's
from. Is the MUX_LINE_OFFSET (= 0x80) the key point.

I have tried to access the board at
	membase + MUX_OFFSET + line * MUX_LINE_OFFSET,
but the first write access to /dev/ttyB1 results in
a hang up (completely, even no network interrupts
were processed !).

Operates the MUX driver in polling mode ? Not in IRQ mode ?

Christoph

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