cvs commit: src/sys/dev/usb ehci.c

[Gary Jennejohn]

Wes Peters writes:
> On Monday 07 March 2005 06:47 pm, Ian Dowse wrote:
> > iedowse     2005-03-08 02:47:18 UTC
> >
> >   FreeBSD src repository
> >
> >   Modified files:
> >     sys/dev/usb          ehci.c
> >   Log:
> >   Fix the silly bug that prevented most EHCI interrupt transfers from
> >   ever working correctly: the code was linking the QHs together but
> >   then immediately overwriting the "next" pointers. Oops. Also
> >   initialise qh_endphub, since the EHCI spec says that we should
> >   always set the pipe multiplier field to something sensible.
> >
> >   This appears to make basic split transactions work, so enable split
> >   transactions for control, bulk and interrupt pipes (split isochronous
> >   transfers are not yet implemented). It should now be possible to
> >   use USB1 devices even when they are connected through a USB2 hub.
> 
> Hurray!  Imagine being able to scan without unplugging the printer
> (or the keyboard)!
> 

Yeah, this is excellent stuff! EHCI seems to finally work at full
speed (my ARCHOS Jukebox Recorder now shows 40 MB/s) and without
all the strange hangs/crashes it used to exhibit.

---
Gary Jennejohn / garyj[at]jennejohn.org gj[at]freebsd.org garyj[at]denx.de