On Fri, Sep 14, 2001 at 06:43:12PM -0700, David Brownell wrote:
>
> At some point I may finish implementing ZERO_PACKET in
> the "ohci-hcd" code, but testing will be a problem for me.
> When I do that, I'll drop you a line, on the chance that you
> may be interested.
Hi,
I've managed to find an OHCI card (Opti chipset) and I've
pluged it in my PC. So far, it seems to be working, apart of course
when frames are multiple of 64 (kaboom).
I did a quick read in the source to see if I could implement
ZERO_PACKET. Well, let's just say that it's not as simple as I
tought. TD are done multiple of 4096, which doesn't fit with the code
I see in usb-uhci which have TD multiple of 64 (so you just need to
add an empty TD at the end). There must be some black magic there.
If you send me a ZERO_PACKET patch for usb-ohci (I'm on
2.4.10-pre8), I'm willing to test that ASAP.
> - dave
Also : my UHCI card had a VIA chipset, which confirm previous
e-mails.
Jean
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