[parisc-linux] One further step ... success: My E55 (9000/856) runs bash-2.04 via PDC

[Christoph Plattner <christoph.plattner@dot.at>]

One further step !

I saw in pdc_cons.c (under arch/parisc/kernel/) that the device
'ttyB'... is
defined for the PDC console. So I changed the driver and added the
driver
as "device" in pdc_cons.c, in the console structure.

So no the thing is accessed in the correct way. The /dev/console is
original
(major=5, minor=1) and not a link to anywhere, and the kernel command
line
has the string "console=ttyB0". (/dev/ttyB0 is major=30, minor=0) !

With friendly regards

	Christoph

PS: I wrote these last mails, because there are some E45/E55 users out
there,
and they are not happy not being able to boot linux. Now there is a way
to use
it via NFS ROOT with the following restrictions:

	- Only port ttyB0 is usable (polling driver, only port 0 console of
MDP)
	- No SCSI support (only NFS ROOT !)
	- nO support of the parallel port.

-------------------------------------------------------------

Christoph Plattner wrote:
> 
> Hello PA-RISC community.
> 
> Again and again I want to have my E55 running Linux, but the problem
> is the serial lines (8-port MDP) is a proprietary interface. So I needed
> a solution.
> 
> I had the idea to use the PDC console, months ago.
> Today hacked a driver (template was serial.c) for a polling PDC device
> driver. I called it pdc_drv.c, the device is "ttyQ0", with MAJOR 30,
> MINOR 0
> and I use a polling period of 30ms (enough for a serial console i/f).
> 
> Because I have not further implemented the internel console i/f for my
> driver, I used the hack with the link of
>         /dev/console --> /dev/ttyQ0
> And my machine boots up via NFS !
> 
> Perhaps we can make a "driver" out of this "hack" !
> 
> In my driver I also use the hack, I have done for the serial.c, that
> with `^\' I can reboot ( machine_restart() ) the computer to work
> remote on it !
> 
> With friendly regards
> 
>         Christoph P.
> 
> --
> -------------------------------------------------------------------------
> private:        christoph.plattner@dot.at
> company:        christoph.plattner@alcatel.at
> 
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-- 
-------------------------------------------------------------------------
private:	christoph.plattner@dot.at
company:	christoph.plattner@alcatel.at