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
