Johannes Erdfelt wrote: > > On Mon, Dec 03, 2001, Mark S. Mathews <[EMAIL PROTECTED]> wrote: > > I'm working on a driver for Intersil Prism2 wireless devices. I'm > > having trouble with the device reset in hub.c. > > > > The Prism device doesn't seem to work properly unless the reset is held > > for 500-700 msec. > > > > Up until now, I've gotten around it by doing my own reset inside my > > probe() function. Unfortunately, various versions of usb-uhci and > > usbcore seem to really dislike having the driver perform that reset > > while other versions don't mind. > > > > I began looking at the device detection and initialization code in hub.c > > and tried modifying the device reset delay to 500 msec and that worked > > quite nicely (my probe() reset was disabled). > > > > Here's the quandry: It's clear that many devices work well with the > > device reset code (and delays) that are currently in hub.c. The Prism2 > > device is probably an oddity, so I don't think modifying hub.c for this > > one device is the right thing to do. Does anyone have a suggestion for > > a way to tune the reset delay in a sane manner that would allow the > > Prism devices to work correctly _and_ allow things to continue the way > > they are? > > > > The most obvious suggestion is to make the reset delay parameterized via > > a module argument (for module compile) and/or Kernel config item (for > > static compile). > > > > If any of the core USB gurus/maintainers think that this is an OK idea, > > I'll be happy to submit a patch. > > So the device sort of works? Enough to enumerate?
Correct. I guess I could have been a little more specific. With the short reset, the device will enumerate and respond to control endpoint commands. It just won't respond to the device specific bulk-endpoint exchanges that are necessary to get the WLAN function running. > But it doesn't work correctly unless you make the delay longer? If I make the delay longer, the bulk-endpoint exchanges start working. Best Regards, -Mark -- Mark S. Mathews AbsoluteValue Systems Web: http://www.linux-wlan.com 715-D North Drive e-mail: [EMAIL PROTECTED] Melbourne, FL 32934 Phone: 321.259.0737 USA Fax: 321.259.0286 _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
