2 Ethernet ports on a MPC860T

2 Ethernet ports on a MPC860T

[Gerhard TAEUBL]

Hi all!

We have to redesign our customer board next year, and there is a requirement to use two ethernet ports. At the moment we use of course the FEC with 10/100 MBit. So we want to add a SCC (SCC3 fits for us ...) for a second ethernet. Is that configuration supported by linux, or easy to adapt? (to switch from another SCC to SCC3 or similar).

What kind of external devices are necessary? And how do you store the MAC Address? (We do it at the moment via a one wire chip, they garant for the right MAC Address).

Thanks in advance

Gerhard


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Re: 2 Ethernet ports on a MPC860T

[Steffen Rumler]

> We have to redesign our customer board next year, and there is a requirement to use two ethernet
> ports. At the moment we use of course the FEC with 10/100 MBit. So we want to add a SCC (SCC3 fits
> for us ...) for a second ethernet. Is that configuration supported by linux, or easy to adapt? (to
> switch from another SCC to SCC3 or similar).

I think this should be easy possible. The arch/ppc/8xx_io provides
both drivers: enet.c: for SCC
              fec.c:  for FEC

Via the CONFIG_SCC[1-3]_ENET switches you can configure the kernel,
which SCC is used (see enet.c).

You must also associate e.g. the 'eth0' network interface
to the SCC and the 'eth1' network interface to the FEC as desired.

In order to do this I think you can pass your own net_device structure
to init_etherdev() (not NULL) inside the driver init entry points
(e.g.; scc_enet_init()).
Before calling init_etherdev() you can initialize the name member
of the net_device structure as you want ("eth0", "eth1", ...).
I hope this works.

>
> What kind of external devices are necessary? And how do you store the MAC Address? (We do it at the
> moment via a one wire chip, they garant for the right MAC Address).
>
We are storing the MAC addresses inside the FLASH memory part of our
system.

Steffen
--


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

Steffen Rumler
ICN ON PNE SB 4
Siemens AG
Hofmannstr. 51                 Email: Steffen.Rumler@icn.siemens.de
D-81359 Munich                 Phone: +49 89 722-44061
Germany                        Fax  : +49 89 722-36703

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

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RE: 2 Ethernet ports on a MPC860T

[Goddeeris Frederic]

Hi,

I think it should work. In fec.c there is some code that "generates" an
extra MAC address when CONFIG_SCC_ENET is defined....

Fred

-----Original Message-----
From: Gerhard TAEUBL [mailto:Gerhard.TAEUBL@frequentis.com]
Sent: dinsdag 11 juni 2002 9:35
To: linuxppc-embedded@lists.linuxppc.org
Subject: 2 Ethernet ports on a MPC860T



Hi all!

We have to redesign our customer board next year, and there is a requirement
to use two ethernet ports. At the moment we use of course the FEC with
10/100 MBit. So we want to add a SCC (SCC3 fits for us ...) for a second
ethernet. Is that configuration supported by linux, or easy to adapt? (to
switch from another SCC to SCC3 or similar).

What kind of external devices are necessary? And how do you store the MAC
Address? (We do it at the moment via a one wire chip, they garant for the
right MAC Address).

Thanks in advance

Gerhard


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