mcc support on mpc8260

mcc support on mpc8260

[Omanakuttan]

Hi,
We are developing device drivers for E1/T1 (8 channels) and E3/T3 framer
chipset (XRT84L38 and XRT7250 ) on mpc8260.
I don't find any documents on mcc programming for E1/T1. The linux
kernel lacks support for that too. (At least I could not find any in the
2.4.17 kernel)
for E3/T3, we could find some sample code. But helpless in E1/T1.

Any pointers are welcome.
Om.


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Re: mcc support on mpc8260

[Ing.Gianfranco Morandi]

I have promised to Pete of releasing some code for such driver. We will
provide to perform such task during the next days.

Actually we are writing some documents to better describe the driver and how
to lock it to the kernel tree.
We will inform the community when the driver will be available.

Anyway on the Motorola site, You can find some example on how program the
mcc.

Be aware do not use the mcc with the silicon revision older than B.1.

Regards

Gianfranco

----- Original Message -----
From: "Omanakuttan" <omanakuttan@tataelxsi.co.in>
To: <linuxppc-embedded@lists.linuxppc.org>
Sent: Thursday, December 12, 2002 5:42 PM
Subject: mcc support on mpc8260


>
> Hi,
> We are developing device drivers for E1/T1 (8 channels) and E3/T3 framer
> chipset (XRT84L38 and XRT7250 ) on mpc8260.
> I don't find any documents on mcc programming for E1/T1. The linux
> kernel lacks support for that too. (At least I could not find any in the
> 2.4.17 kernel)
> for E3/T3, we could find some sample code. But helpless in E1/T1.
>
> Any pointers are welcome.
> Om.
>
>
>


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

RE: mcc support on mpc8260

[Allen Curtis]

> Be aware do not use the mcc with the silicon revision older than B.1.

Could you provide more information on this comment. There are lots of
reasons not to use a rev A.1 chip. This is the first time that I heard about
using too new of a chip.

THX


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Re: mcc support on mpc8260

[Ing.Gianfranco Morandi]

I mean that by using the revision A.1 You could have some troubles.
Main reason is related to the Global Underrun (GUN) that often occours when
many channels are active (we use continuosly 64 channels on one mcc). This
issue has been repored by Motorola in its document "mpc8260cesumm.pdf" and
finally soved in the revision C.2 (6K23A)
Second issue, is related to the possibility of having a bit rotation into a
time slot. This problem has never been reported by Motorola but it seems to
be any more present in revisione C.2.

Regards

Gianfranco

----- Original Message -----
From: "Allen Curtis" <acurtis@onz.com>
To: "Ing.Gianfranco Morandi" <gianfranco.morandi@euro-studio.it>;
"Omanakuttan" <omanakuttan@tataelxsi.co.in>;
<linuxppc-embedded@lists.linuxppc.org>
Sent: Friday, December 13, 2002 3:59 PM
Subject: RE: mcc support on mpc8260


>
> > Be aware do not use the mcc with the silicon revision older than B.1.
>
> Could you provide more information on this comment. There are lots of
> reasons not to use a rev A.1 chip. This is the first time that I heard
about
> using too new of a chip.
>
> THX
>
>
>


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

Re: mcc support on mpc8260

[Omanakuttan]

Ing.Gianfranco Morandi wrote:
> I have promised to Pete of releasing some code for such driver. We will
> provide to perform such task during the next days.
Thank you very much for this information. Since I will be working on
that, I will also be glad to contribute something to your activities.
>
> Actually we are writing some documents to better describe the driver and how
> to lock it to the kernel tree.
Once I understand it, I will definitely contribute to your efforts.
> Anyway on the Motorola site, You can find some example on how program the
> mcc.
I downloaded some small code from motorola site and going through it.
>
> Be aware do not use the mcc with the silicon revision older than B.1.
I don't know how to do that yet.(I am very much new to embedded world)
Is it explained in motorola site? I came across checking the chip
version and the meaning of letters.

Thank you,
Om.


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