Hi Sebastian, On Wed, Jul 17, 2013 at 07:12:29PM +0200, Sebastian Andrzej Siewior wrote: > > >After some minor DT tweaking on the current patchset, > >I've managed to detect an USB mass storage device in the > >second instance (host / usb1) using a Beaglebone black board. > > Beaglebone black, that one has a different device tree which is not > mainline, right? > Beaglebone black it is. But I'm almost sure I just used the am....bone.dts file that's mainlined. I just changed the mode or something like that, very minor tweaking indeed, altough right now I don't remember exactly which changes. > >However, after I unplug the device, it's not recognized > >when I replug it. Maybe you can take a look at this; > >i'll do some more testings and see what I can come up with. > > I figured out why my Host is not recognized on the second plug: > At module load time, musb_start() is executed and it sets the > MUSB_DEVCTL_SESSION in devctl. > After the device is unplugged dsps_musb_try_idle() schedules a timer > which executes the local otg_timer() function. Since the phy is in > OTG_STATE_A_WAIT_BCON state, the MUSB_DEVCTL_SESSION bit gets removed. > If the removal of the bit is ignored, the device is recognized after a > re-plug. > Mmmm... okey. Interesting insight, thanks! > >Also, FWIW, I think that having a separate USB phy for am35xx would be > >much better. > So you would prefer a new file with 90% copy of what we already have in > the nop_phy? > No, of course not. -- Ezequiel García, Free Electrons Embedded Linux, Kernel and Android Engineering http://free-electrons.com -- 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
