On 2014-11-19, [email protected] <[email protected]> wrote:
> the little Linux board Arietta G25 has a ethernet over usb feature --
> no real PHY, no RJ45 plug/jack.
I don't understand.
Regardless of the bus between the CPU and the Ethernet controller
(USB, PCI, ISA, PCI-express), and regardless of the connector between
the Ethernet PHY and the cable (RJ45, M12, etc.) you have to have a
PHY, or it's not Ethernet.
[There is one exception to this: the old 15-pin D-sub AUI connector
could be use to directly interconnect to Ethernet controllers via an
AUI hub without using any PHYs. But, I haven't seen anything with an
AUI interface on it for 20 years.]
Or are you talking about some _other_ protocol that's being run over
USB that presents to the Linux network layer the same API as that
implemented by Ethernet drivers?
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