====== Ether Switch Notes ======

The ether switch stuff is a little .. under-documented. Let's figure out what's supported, what's not supported, and what needs to be addressed.

===== e6000sw =====

TBD

===== ip17x =====

TBD

===== rtl8366 =====

TBD

===== ukswitch =====

The ukswitch driver simply enumerates PHYs on the MDIO bus provided. It's for simple or dumb switches that you just want port status for.

===== arswitch =====

The arswitch driver supports quite a few chipsets. Each have different levels of feature support.

==== ar8316 ====

* supports default, per-port and per-vlan vlans
* supports only all-tagged, or all-untagged vlans on a given port (eg the port config has 'addtag' to add all tags).

TODO:

* can the switch be programmed to support addtag to add vlan tags, and optionally 'native' pvid support - so the port pvid won't be tagged. (eg native vlan 1 means untagged frames are vlan 1, other vlans are tagged.)

==== ar7240 / ar7241 / ar933x / ar934x ====

* supports default, per-port and per-vlan vlans
* supports only all-tagged, or all-untagged vlans on a given port (eg the port config has 'addtag' to add all tags).

TODO:

* can the switch be programmed to support addtag to add vlan tags, and optionally 'native' pvid support - so the port pvid won't be tagged. (eg native vlan 1 means untagged frames are vlan 1, other vlans are tagged.)

==== ar8327 ====

* supports default, per-port and per-vlan vlans.
* supports per-vlan tagging - ie, you can configure the vlans in each vlangroupX to be tagged (eg 5t) or untagged (eg 5).

Untagged frames received on a port get treated as having come in on the port pvid.

==== unsupported ====

* ar8216 - only stubs; no support yet
* ar8226 - only stubs; no support yet
* ar8337 - no support yet (mostly AR8327, just need to add a handful of specific bits.)

===== Examples =====