From mboxrd@z Thu Jan 1 00:00:00 1970 From: marex@denx.de (Marek Vasut) Date: Mon, 24 Jun 2013 15:51:19 +0200 Subject: Chipidea usb otg support for IMX/MXS (device functionality) In-Reply-To: References: <51A5A808.2070803@digi.com> <201306221529.53043.marex@denx.de> Message-ID: <201306241551.19831.marex@denx.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hello Peter, > > Hi Peter, > > > > > > Peter, I dunno if you are already aware of it, but the USB peripheral > > > > mode hangs > > > > on MX233. It's easy to replicate for example if you try to run CDC > > > > ethernet over > > > > the USB peripheral mode, then telnet into the board and run "dmesg" . > > > > This will > > > > trigger a "larger" data transfer which will make the UDC driver hang. > > > > This > > > > doesn't happen on MX28 so it must be some MX233-specific thing. > > > > > > Marek, Have you tried below? > > > > > > http://marc.info/?l=linux-usb&m=136537318510847&w=2 > > > > > > It may not the USB itself problem, the mx23's usb is almost > > > the same with mx28's. > > > > This also happens on a different MX23-based board for me. This other > > board I > > tried has mDDR DRAM and the DRAM is operating correctly. The 96MHz thing > > people > > complained about in the Olimex forum is resolved now. > > Add shawn. > > Marek, have you tried mx23 evk? No, I don't have this one available right now. I tried both MX23 Olinuxino maxi (I just mutilated the board so that I cut traces to the USB devices on the board and routed out USB gadget connector) and a custom MX23 board. Note that both have working USB peripheral mode in U-Boot too, but the driver in U-Boot is very minimalistic. > Shawn, marek reported the udc function at mx23 works abnormal, but it works > good at mx28. Have you tried mx23 udc recently? Fabio, can you possibly test on MX23EVK please? Best regards, Marek Vasut