Is the freebsd usb generic device driver complete?

[Hans Petter Selasky]

On Thursday 28 April 2005 08:24, paradox wrote:
> I am using a low speed usb key in freebsd
> 5.3Release,It has 2 interrupt pipe besides the control
> pipe,the IN pipe is endpoint 1,its interval is 20, OUT
> pipe is endpoint 2, interval is 10. I wrote a driver
> for it in linux,and everything is ok.when I plug the
> key in a system with freebsd 5.3release, it find the
> key,make 3 nodes ugen0,ugen0.1 and ugen0.2 for it, I
> can get those descriptors from ugen0,but I can't wrote
> anything in the OUT pipe ugen0.2. from usb analyser I
> found the system send the write packet,just like in
> linux,but the return is NAK.
>
> I read the code in ugen.c,usbdi.c,uhci.c,usb.c and
> usbdi_util.c,and don't know why it set the ival to
> USB_DEFAULT_IVAL(0),I contact with Lennart Augustsson
> whose name is in the head of those usb codes, he said
> he has never run those code in freebsd and he didn't
> write the intr write code!
>
> I still can't sure it is because of the non-standard
> hardware or software bugs.now I try to write a driver
> for the usb key in freebsd, if there has any bugs in
> the ugen.c, I hope i can made a patch for it.can
> anyone tell me how the intr write designs in the
> ugen.c, and why it only use the USB_DEFAULT_IVAL?

The OHCI/UHCI/EHCI drivers interpret the polling interval similar to this:

 xfer->interval = setup->interval;

 if(xfer->interval == 0)
 {
  //
  // get interval from the endpoint descriptor
  //
     xfer->interval = xfer->pipe->edesc->bInterval;
    }

 if(xfer->interval == 0)
  {
  xfer->interval = 1 /* ms */;
 }

What USB-controller are you using?

Is the device connected through an external USB HUB?

Are you sure that the right configuration value has been set?

Yours
  HPS