On Tue, Jun 14, 2022 at 09:12:23AM +0200, Andrej Picej wrote: > Hi all, > > when testing barebox ethernet on i.MX6 (phyCORE) we encountered a bug: > the ethernet re-init on barebox doesn't work! If we do: > $ ifup eth0 > $ ifdown eth0 > and then: > $ ifup eth0 > $ ping HOST_IP > the device hangs and can only be saved by resetting the board manually. I can confirm the behaviour is the same here. > > We narrowed the problem down to the "fec_tx_task_enable". It seems that > enabling tx task with writing to TDAR reg hangs the device shortly after. > > Did you guys maybe encounter something similar on i.MX6 boards or on any > other boards? > > I guess this is a really specific problem as people don't normally do > ifup/ifdown with ethernet in bootloader :D. Nope :) > > Do you have any idea what could be the reason or how could this be solved? > Any useful information would be greatly appreciated. Part of the problem is that fec_halt() tears down the device completely. The counterpart of that is fec_init(), but that is called from during probe only. I think fec_init() should be called from fec_open() as well. A quick test revealed this is really only part of the problem. The next one is that fec_update_linkspeed() is not called on second open, so the fec speed registers will not get their correct value. Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
