Re: ISDN on MPC ?

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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