On Sun, Jun 28, 2015 at 01:28:21PM -0500, Peter E. Berger wrote: > From: "Peter E. Berger" <pberger@xxxxxxxxxxx> > > When using newer Edgeport devices such as the EP/416, idle ports are > automatically bounced (disconnected and then reconnected) approximately > every 60 seconds. This breaks programs (e.g: minicom) where idle periods > are common, normal and expected. > > I confirmed with the manufacturer (Digi International) that some Edgeports > now ship from the factory with firmware that expects periodic "heartbeat" > queries from the driver to keep idle ports alive. This patch implements > heartbeat support using the mechanism Digi suggested (periodically > requesting an I2C descriptor address) that appears effective on Edgeports > running the newer firmware (that require it) and benign on Edgeport > devices running older firmware. Since we know that Edgeport firmware > version 4.80 (the version distributed in /lib/firmware/down3.bin and used > for Edgeports that are either running still older versions or have no > onboard non-volatile firmware image) does not require heartbeat support, > this patch schedules heartbeats only on devices running firmware versions > newer than 4.80. Looks good now. I did a quick test here with an Edgeport/1 and firmware version 4.80 and 5.32 (from digi's ftp) and do not see any disconnects with either version even without this patch. Is that expected? Is only EP/416 affected or are you seeing these disconnects with even newer firmware than 5.32? Thanks, Johan -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
