On Sunday 31 October 2004 07:58, Alan Stern wrote: > On Sun, 31 Oct 2004, N Lin wrote: > > > Is it possible that the PCMCIA card is incorrectly reporting > > the number of UHCI controllers (reporting 2 whereas only 1 is > > present) ...
Not really. The chips all seem to be manufactured identically, with the CardBus packages just not wiring up all ports. Vendors can choose how they wire them up: > A better guess would be that there are > two UHCI controllers, each with one port attached to a connector and one > port attached to nothing, and the first controller is broken. I've seen that done with OHCI; it helps maximize bandwidth available to each controller, so you can do things like hook one fullspeed webcam to each port and run it at top speed. > You left out option (c): exchange the PCMCIA card because it isn't > working! Always a good option, until the corporate rollback of our legal rights is complete. Option (c) reduces profits, you understand! > > is it possible (i.e. have there been similar cases in the past) > > that the card has 2 UHCI controllers, one broken for whatever > > reason, with EHCI being "soft-wired" by default to use the broken > > one, but with some black-box hidden secret code (probably in the > > proprietary driver) that will cause the EHCI controller to re-route > > USB1 requests to the other, working UHCI controller? Is such a > > thing (rerouting of the EHCI's UHCI companion controller by the > > driver software) heard-of? Not by me, but then I've never seen the detailed VIA specs either. On the other hand, having a controller that refuses to initialize is pretty wierd too. - Dave ------------------------------------------------------- This SF.Net email is sponsored by: Sybase ASE Linux Express Edition - download now for FREE LinuxWorld Reader's Choice Award Winner for best database on Linux. http://ads.osdn.com/?ad_id=5588&alloc_id=12065&op=click _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
