On Thu, 17 May 2001, Thomas Sailer wrote:
>Dan Streetman schrieb:
>
>> Ok, here is a patch that adds interrupts (via interrupt URBs, instead of bulk
>> URBs) to usbdevfs. This takes a different approach than the last
>> (usbdevfs-interrupt) patch. It allows using interrupt-type URBs via usbdevfs,
>> and maintains the correct polling interval based on the endpoint's bInterval.
>
>Why do you need a precise polling interval? Is there any device that
>actually needs this? I seriously doubt it because you cannot do this in windows
>either. So unless there actually is a device that needs this I think this
>is fairly useless bloat...
I don't need a precise polling interval per se, but I do need a polling
interval that's less than bulk's as-fast-as-possible. I have in my possesion a
Logitech 2-button and wheel mouse that *can't* respond at all when being polled
with bulk URBs, because it's NAKing too fast. I bet it's not the only low-speed
device with this problem. And, I think Logitech USB mice are fairly popular.
Also, this was pointed out before, the uhci HCD doesn't allow bulk URBs on
low-speed devices.
I really, really don't think this is bloat. Please consider it.
--
Dan Streetman
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