Ahh, I see it now. Would it be a good idea to link it from the main page
as well ? I imagine quite a few people would be interested, and besides
it is more thorough than simply a status of USB 2.0 adaptors.
best
Vladimir Dergachev
On Sun, 21 Apr 2002, Stephen J. Gowdy wrote:
> It is linked from the devices page.
>
> On Sun, 21 Apr 2002, Vladimir Dergachev wrote:
>
> >
> > Thank you for a very informative reply ! Btw, I could not find a link to
> > usb2.html from www.linux-usb.org main page..
> >
> > best
> >
> > Vladimir Dergachev
> >
> >
> > On Mon, 15 Apr 2002, David Brownell wrote:
> >
> > > > Is there some webpage I read it to find out the status of USB 2.0 support
> > > > in Linux ? (In particular the "highspeed mode" or whatever 480mbit/sec is
> > > > called).
> > > >
> > > > If not, could some enlighten me ?
> > >
> > > No webpage so far ... just try it out! Meanwhile:
> > >
> > > linux/Documentation/usb/ehci.txt ... in 2.4.19-pre6 and 2.5.8
> > >
> > > http://www.linux-usb.org/FAQ.html#gs6 ... about USB 2.0
> > >
> > > Short version of the story is
> > >
> > > USB 2.0 == USB 1.1
> > > + "high speed" (480 mbit/sec) busses and hubs
> > > + certification (two new logos; "highspeed" is two
>colors)
> > >
> > > The highspeed controller standard is called EHCI, and has Linux support.
> > > The USB 2.0 support includes hub and other usbcore updates, as well
> > > as the "ehci-hcd" driver for those highspeed controllers.
> > >
> > > The 2.5.8 "ehci-hcd" version is the most functional, and should work with
> > > EHCI implementions from NEC, Intel, Philips, VIA, and maybe more.
> > > It supports all four types of high speed transfers (control, bulk, interrupt,
> > > and isochronous). I'll update the 2.4 version to match it at some point.
> > > Currently the 2.4 driver is older: only NEC, no isochronous transfers.
> > >
> > > The "split transaction" support through high speed hubs is only partially
> > > functional so far though. Control and bulk transfers work through them,
> > > at least until certain kinds of errors happen. The hub driver doesn't yet
> > > know how to recover from those kinds of transaction translator error.
> > >
> > > Also, there is no support yet for split periodic transactions; it'll be easier
> > > for interrupt transfers (except scheduling) since split iso involves a new
> > > way to talk to EHCI implementations. (That means: don't hook up USB 1.1
> > > webcams, keyboards, mice, etc. to highspeed hubs, they'll enumerate
> > > but you won't be able to use them otherwise.)
> > >
> > > Linux USB 2.0 support seems to work pretty well for the usb-storage
> > > devices that now exist (modulo some slowdown from the usb-storage
> > > driver not queuing requests). That's all that most folk have so far, but
> > > highspeed scanners and printers ought to be in the works too.
> > >
> > > On the "develop a highspeed USB device" side, Cypress EZ-USB FX2
> > > plays nicely with Linux. I'm also looking forward to the new PCI based
> > > controller upcoming from NetChip ... that'll be practical to use in many
> > > embedded "Linux device" configurations! :)
> > >
> > > - Dave
> > >
> > >
> > >
> > >
> > >
> > >
> > > _______________________________________________
> > > [EMAIL PROTECTED]
> > > To unsubscribe, use the last form field at:
> > > https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
> > >
> >
> >
> > _______________________________________________
> > [EMAIL PROTECTED]
> > To unsubscribe, use the last form field at:
> > https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
> >
>
> --
> /------------------------------------+-------------------------\
> |Stephen J. Gowdy | SLAC, MailStop 34, |
> |http://www.slac.stanford.edu/~gowdy/ | 2575 Sand Hill Road, |
> |http://calendar.yahoo.com/gowdy | Menlo Park CA 94025, USA |
> |EMail: [EMAIL PROTECTED] | Tel: +1 650 926 3144 |
> \------------------------------------+-------------------------/
>
>
> _______________________________________________
> [EMAIL PROTECTED]
> To unsubscribe, use the last form field at:
> https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
>
_______________________________________________
[EMAIL PROTECTED]
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
