Hi! On Mon 2019-09-02 09:06:51, Tony Lindgren wrote: > * Pavel Machek <pavel@xxxxxxx> [190902 09:44]: > > On Mon 2019-09-02 11:23:44, Pavel Machek wrote: > > Hmm. I guess CONFIG_USB_MUSB_DUAL_ROLE=y might be useful. > > > > And now... if I unplug/replug the usb after the boot, USB hub and > > mouse are recognized. Good! > > > > Less than minute later: > > > > mmusb-hdrc.0.auto: Babble > > USB disconnect > > The babble is most likely caused by some kind of signaling issue. > > > I unplug, replug usb (not at the phone, between hub and dongle, and > > green LED indincating charging starts blinking rapidly. > > > > cpcap-core spi0.0: EOT timed out. > > > > I try plug/replug, and now green led is on. > > > > I unplug replug at the phone, and get bunch more of messages: > > > > musm _set_peripheral: already in peripheral mode: 99 > > musm _set_peripheral: already in peripheral mode: 81 > > musm _set_peripheral: already in peripheral mode: 81 > > > > musb_set_host: could not set host: 99 > > musb_set_host: could not set host: 99 > > musb_set_host: could not set host: 99 > > musb_set_host: could not set host: 99 > > musb_set_host: could not set host: 99 > > musb_set_host: could not set host: 99 > > musb_set_host: could not set host: 99 > > musb_set_host: could not set host: 99 > > > > Unplug/replug at host, and again, hub+mouse is detected. > > > > I unplug power connected to one of USB hub's ports... and find out > > that phone was _not_ powering it. > > > > Ok... so something somehow works.... sometimes :-). > > My guess is you're missing a USB micro-B cable with ID pin > grounded, with that things should just work automagically. > > So no need for hubs feeding back VBUS and no need to > try to force host mode via sysfs unlike on n900. I don't think so... I got it to run in the end (and I have to apologize, it seems to work at least as long as it is plugged it an boot and not touched). So... I actually have two cables. #1 definitely does not have ID pin grounded. That does not work, not even in original android. #2 definitely has _something_, because it does work in original android. But not even original android provides VBUS (5V on USB) in that configuration. It also looks like hardware _can_ provide at least VBAT on VBUS, because I seen that during some of the crashes. Thanks for the patches, BTW. Best regards, Pavel -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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