Hi, Pali Rohár <pali.rohar@xxxxxxxxx> writes: > On Monday 22 February 2016 09:31:50 Felipe Balbi wrote: >> Pali Rohár <pali.rohar@xxxxxxxxx> writes: >> >> > On Tuesday 26 January 2016 18:26:32 Tony Lindgren wrote: >> >> * Pali Rohár <pali.rohar@xxxxxxxxx> [160126 06:35]: >> >> > On Thursday 21 January 2016 12:30:13 Tony Lindgren wrote: >> >> > > * joerg Reisenweber <joerg@xxxxxxxxxxxx> [160121 11:35]: >> >> > > > On Thu 21 January 2016 11:21:13 Tony Lindgren wrote: >> >> > > > > Do you have some pointer >> >> > > > > to the "certain resistor value on ID to GND" spec? Is it >> >> > > > > maybe part of the carkit related parts of the USB spec? >> >> > > > >> >> > > > ""Three additional ID pin states are defined[4] at the nominal >> >> > > > resistance values of 124 kΩ, 68 kΩ, and 36.5 kΩ, with respect >> >> > > > to the ground pin. These permit the device to work with USB >> >> > > > Accessory Charger Adapters that allows the OTG device to be >> >> > > > attached to both a charger and another device simultaneously. >> >> > > > [6]"" >> >> > > > https://en.wikipedia.org/wiki/USB_On-The-Go#OTG_micro_plugs >> >> > > >> >> > > OK thanks. So it's the "accessory charger" part of the >> >> > > battery charging specification 1.1. >> >> > >> >> > So, Tony, do you have some idea what needs to be changed and how to >> >> > fix peripheral mode after boot on Nokia N900? >> >> >> >> No, I'm waiting to hear an educated guess from Felipe on this one. >> >> about why peripheral mode doesn't work on n900 ? No idea. that's always >> the default role of MUSB and last I checked, before stopping working on >> this, BBB was working just fine. >> >> N900 is odd in that it has two PHYs (1701 handles data lines while >> twl4030 handles power lines, IIRC), but peripheral should be working. >> >> The only reason for MUSB to not start would be that it's not detecting >> VBUS being above session valid threshold, however twl4030 should have an >> IRQ for that. >> >> What happens when cable is attached ? Any IRQs anywhere firing ? >> > > Just to note, when I call echo peripheral > mode then detecting usb > cable starts working and usb peripheral mode also works fine (also > after disconnecting and connecting usb cable again). Read my first > post in this thread, there are also some logs: > https://lkml.org/lkml/2016/1/9/69 interesting... that softconnect interface looks odd. We _know_ the value of softconnect from musb->softconnect. /me reads commit which added it... Oh okay, that's only valid for host mode. Argh! Okay, the session bit is _NOT_ set when it should be. Note that DevCtl reads as 0x98. Bit 0 is Session bit and that's not set. MUSB _is_ in the device mode (bit 7 set). For some reason DevCtl didn't get set. Care to add a print to musb_gadget_pullup() to see when/if it's called ? BTW, Bin will be maintaining MUSB going forward. -- balbi
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