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Re: [RFT] Re: [Patch] [bug #26237] multiple problems with usb devices

From: Aleš Nesrsta
Subject: Re: [RFT] Re: [Patch] [bug #26237] multiple problems with usb devices
Date: Mon, 21 Jun 2010 22:24:06 +0200

Hi Vladimir,

now I have working SSH, so I committed my last work into usb branch
(commented as "Faster OHCI, USB hub support, UHCI portstatus corr.",
revision 2427).

(Sorry if it is not the right way how to cooperate - should I make
another, my own branch? Or wait first for your agreement about notified
patches? Or...?)

Best regards

> Hi Vladimir,
> one more idea:
> Vladimir 'φ-coder/phcoder' Serbinenko wrote:
> > Hello, Aleš. Today I merged usb branch into mainline. Now I've started
> > some work towards hotplugging and module autoloading. Currently it just
> > checks portsstatus to see newly connected devices. Touble is that if you
> > disconnect a device and plug a new one at its place this routine won't
> > notice anything because ports are polled only when enumerating
> > usbdevices. We need a more reliable way to detect new devices. Perhaps
> > we should try to assign addresses to any device without address and see
> > if it responds to configuration request. If noone responds assume that
> > no devices were newly connected.
> > On Yeeloong 'usb' command lists hotplugged devices correctly but bulk
> > transfer fails with donehead=0.
> It can be result of bad toggling. If device does not accept
> configuration, it does not reset toggle bits in its bulk endpoints.
> But function grub_usb_set_configuration does reset of toggle bits in any
> case. Perhaps function grub_usb_set_configuration should reset toggling
> only if configuration is accepted by device.
> Best regards
> Ales
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