ECHI and toggle bit

[austriancoder]

Hi all.

Atm I am try to get coreboot/seabios with usb working on a Geode LX800. At the moment
I stuck with EHCI. The biggest question for me is, if the ehci driver needs to set the toggle bit
in the TD's or if the EHCI HC does it on its own.

For a full reference here is the full thread at the coreboot/seabios ml.
http://www.mail-archive.com/coreboot@coreboot.org/msg37031.html

Thanks

[Jan Axelson]

From the final messages, it looks like you got it working...

[Barry Twycross]

We use both depending on the endpoint type. Control transactions have defined toggles, so setting control endpoints to use the TD toggle makes sense. Most other endpoints it makes more sense to let the contoller do toggles automatically and ignore the TD toggle.