Re: query EHCI 3ms SUSPEND
David Brownell <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <20071210150547.61A7B16AF62@adsl-69-226-248-13.dsl.pltn13.pacbell.net> |
> Date: Mon, 10 Dec 2007 19:54:37 +0530 > From: "Pandita, Vikram" <[email protected]> > > If there is no USB activity on an EHCI port for 3ms, does the EHCI > stack send a SUSPEND signal to device. There is no such thing as a "suspend signal" ... if there's no activity for 3 msec, that's what peripherals use to deduce that they've been suspended. No intervention from EHCI software or hardware is involved. > How is this 3ms idle Suspend implemented in EHCI if it is implemented? See above, and below: > If I check on Fedora, I don't see that happening rather SOFs keep going > to the device? So far as software is concerned, once a port gets enabled it is expected to issue SOFs unless it gets explicitly told to suspend. - Dave ------------------------------------------------------------------------- SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel