Re: IBM405GP startup-code

Re: IBM405GP startup-code

[Grant Erickson]

On 6/29/2000 1:49 AM, Stefan Roese wrote:
>we are currently developing a cpci board with the ibm 405gp ppc. We would
>like to run linux on this board. Now i have to write the startup-code for
>this board (init of cpu, sdram-controller, etc.). Has anybody allready
>written some startup-code for the 405gp? Would you share this code with us
>to speed up our developement?

If you purchase the 405GP BSP development kit (with or without the
"Walnut" reference board) from IBM, they provide some basic boot ROM code
that you may use and modify.

Regards,

Grant

 Grant Erickson                       University of Minnesota Alumni
  o mail:erick205@tc.umn.edu                              1996 BSEE
  o http://www.tc.umn.edu/~erick205                       1998 MSEE


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ISDN on MPC ?

[Tobias Otto-Adamczak]

Hi folks, I have a new task.

I have an MPC860 on an MBX-board running Linux 2.2.13 based on MontaVista
sources. I want to add ISDN functionality. Has anyone of you already done
work in this area ?

As far as I got it I have to write a new hardware-level driver for the
isdn4linux subsystem, is that right ? Is anyone aware of special problems
I have to focus ?

Ciao - Tobias


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Re: ISDN on MPC ?

[Wolfgang Denk]

In message <Pine.GSO.4.21.0006291656470.11412-100000@samson.hrz.tu-chemnitz.de> you wrote:
>
> I have an MPC860 on an MBX-board running Linux 2.2.13 based on MontaVista
> sources. I want to add ISDN functionality. Has anyone of you already done
> work in this area ?

Not completed yet, but we are working on it.

The design is  based  on  the  HFC-SP  chips  by  Cologne  Chip,  see
http://www.colognechip.com/isdn/controllers/frame-hfc-sp.htm

> As far as I got it I have to write a new hardware-level driver for the
> isdn4linux subsystem, is that right ? Is anyone aware of special problems
> I have to focus ?

Interfacing the ISDN chips with the MPC8xx  bus  might  be  an  issue
(timing).  That's  why we selected a PCMCIA based design (although we
won't use a PCMCIA card).


Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
Conscious is when you are aware of something, and conscience is  when
you wish you weren't.

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RE: ISDN on MPC ?

[Tobias Otto-Adamczak]

> ... There is also HDLC functionality in the 860s CPM so that you are
> not forced to use an external framer.

That's exactly what my focus is on at the moment. I want to check out what
software effort is needed to get these things working under linux. This is
for my diploma thesis. Another student is adding the hardware needed (ISDN
transceiver chip from Mot etc.).
--
Ciao - Tobias


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Re: ISDN on MPC ?

[Wolfgang Denk]

In message <A914533BF4B9D2118D980008C7894C0A02D1EBD3@dueis01nok> you wrote:
>
> AFAIK the MPC860 µP's are designed especially to be used with existing
> telecom- designs, including existing ISDN chipsets. There should be support
> for SIEMENS' GCI(2) bus and the motorola own bus (forgot the name). There is
> also HDLC functionality in the CPM so that you are not forced to use an
> external framer.

Right, you can handle all this using the SCC's.  I  know  of  several
commercial  solutions  that  do  exactly that. Unfortunately, I don't
know of an Open Source project.

In our case we estimated  that  it  would  be  easier  (in  terms  of
development  effort)  to  interface  an  external  framer, and re-use
existing isdn4linux code as much as possible. Also,  using  a  PCMCIA
prototype  card,  it's  much  easier  to sort out some other problems
lioke endianess by running the same code  on  very  similar  hardware
both on the MPC8xx target and on a normal x86 laptop.

> I didnt actually integrate such things yet, but it is a spare time project I
> want to start one day.

Just let me know if you have any free manpower to offer :-)

> In isdn4linux there should be code to access some of the siemens chips (the
> ones most of the passive PC- isdn- cards are based on). Perhaps there could
> be some driver code you could base your design on.

That's what we're doing.

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
"There are things that are so serious that you can  only  joke  about
them"                                                    - Heisenberg

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RE: ISDN on MPC ?

[Ole.Reinartz]

>
> > I didnt actually integrate such things yet, but it is a
> spare time project I
> > want to start one day.
>
> Just let me know if you have any free manpower to offer :-)
>

Well, hm, that actually is the problem. One day a collegue of mine and me
want to take one board of a former project with a mpc860 on it (I got linux
2.2.5 running on it) and take another board of another former (ISDN-)
project and build something like a RAS server with 4 ISDN ports.
But until now we a stuck with other (mpc860 based, but not linux related)
work.
I'll get back to the list once we find the time.

Ole

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