On Mon, 19 Jun 2006, JackRain wrote: > hi,everybody~~ > > i would like to ask a usb bus reset issue when i working > on isp1582 usb2.0 peripheral device controller. > > that's > I read the usb2.0 spec ,and found that the usb > bus reset should force to the device when device first > > attached or the device receiveSE0 or idle after Timer0 > times out. > > but I got usb reset many times ,rightly after usb > enmuation finished or disk device can be found on PC ,and beginning > > to carry out the scsi command. > > I have no idea why usb reset so much?? the enmuation > can finished successfully when i force the isp1582 in full-speed. > > and sometimes failed if set in high-speed mode. > > can anyone give me some tips?? or light me something??
There's a problem in your UDC driver's support for high speed. The problem causes SCSI commands to fail. Each time the host sees that a command has failed, it issues a USB port reset to reinitialize the device. Alan Stern _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
