linux-kernel - Re: Nokia N900: musb is in wrong state after boot

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 26 Jan 2016 15:34:50 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Tony Lindgren <tony@...mide.com>
Cc:	joerg Reisenweber <joerg@...nmoko.org>,
	Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	Sebastian Reichel <sre@...nel.org>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Pavel Machek <pavel@....cz>, Nishanth Menon <nm@...com>
Subject: Re: Nokia N900: musb is in wrong state after boot

On Thursday 21 January 2016 12:30:13 Tony Lindgren wrote:
> * joerg Reisenweber <joerg@...nmoko.org> [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?

First I would like to have fully working peripheral mode on Nokia N900
and then we can try to hack host mode (if possible).

But peripheral mode is a must due to development, because it provides
usb network or usb tty.

-- 
Pali Rohár
pali.rohar@...il.com