[parisc-linux] Server E55 (9000/856) - PDC console, SPIFI

[parisc-linux] Server E55 (9000/856) - PDC console, SPIFI

[Christoph Plattner]

Hello PA-RISC GURUS !

* Is it possible to use the PDC console as system console ?

* Is the PDC documentation enough to find out or to write a
	driver (not only for printk !) ?

* Concerning the E55 interfaces, I got the tip to search
	with the keyword "SPIFI". What does this mean ?
	How can I search in the "whole" mailing list ?

With friendly regards
	Christoph

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Re: [parisc-linux] Server E55 (9000/856) - PDC console

[Helge Deller]

On Tuesday 30 January 2001 15:01, Christoph Plattner wrote:
> Hello PA-RISC GURUS !
>
> * Is it possible to use the PDC console as system console ?

The PDC-interface misses a function to get interrupts when a key was pressed. 
To get around that problem you would need to poll the whole time, which would 
result in a *very* bad performance.
Instead of using the PDC-console it is much better to get the STI console 
working. I've already begun to rewrite the current STI code from prumpf, 
which you can find under /drivers/video/sti/*.
Currently both - the new and the old STI code - is broken and unfunctional, 
but I will continue to work on it as far as time permits.

Greetings,

	Helge.

Re: [parisc-linux] Server E55 (9000/856) - PDC console

[Grant Grundler]

Helge Deller wrote:

> Instead of using the PDC-console it is much better to get the STI console 
> working.

I highly doubt the E55 (and similar servers) have STI.
And I'm not sure HP ever made an HP-PB graphics device - just
not enough bandwdith on HP-PB to make it useful.

grant

Grant Grundler
parisc-linux {PCI|IOMMU|SMP} hacker
+1.408.447.7253

Re: [parisc-linux] Server E55 (9000/856) - PDC console

[Christoph Plattner]

Thanks for the answer, but ...

... the E55 server has no STI or similar console. Only as serial one !
And this serial console is on the 8-port serial multiplexer board,
and I miss a driver for that (same for SCSI !) on the E55 (9000/856).

So the only chance is the use of PDC console for the first step.
And as my experience shows on a PC with 8-port serial board, it is
not a problem to poll in 20-25ms cycles, which is enough for serial
console operation and is not a performace problem....

With friendly regards

	Christoph


Helge Deller wrote:
> 
> On Tuesday 30 January 2001 15:01, Christoph Plattner wrote:
> > Hello PA-RISC GURUS !
> >
> > * Is it possible to use the PDC console as system console ?
> 
> The PDC-interface misses a function to get interrupts when a key was pressed.
> To get around that problem you would need to poll the whole time, which would
> result in a *very* bad performance.
> Instead of using the PDC-console it is much better to get the STI console
> working. I've already begun to rewrite the current STI code from prumpf,
> which you can find under /drivers/video/sti/*.
> Currently both - the new and the old STI code - is broken and unfunctional,
> but I will continue to work on it as far as time permits.
> 
> Greetings,
> 
>         Helge.
> 
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