Messages in this thread |  | | Date | Tue, 25 Feb 2014 12:12:34 -0600 | From | Felipe Balbi <> | Subject | Re: [PATCH 2/6] usb: gadget: mv_udc: disable HW zlt for ep0 |
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Hi,
On Tue, Feb 25, 2014 at 07:46:08AM +0000, Peter Chen wrote: > > > > > > Hardware zlt will try to send the zero length packet > > > > > > automatically when the data transferd is multiple times of max > > > > > > packet, this will cause issues on Windows. > > > > > > So let's disable HW zlt by default. > > > > > > > > > > Would you have description that what kinds of issue on Windows if > > > > > zlt is is selected? > > > > > > > > > > > > > Enumeration will fail. > > > > > > > > > > What causes enumeration fail, why it does not occur before? > > > > > A unexpected zero packet cause enumeration fail. > > It's not easy that the descriptor is actually 1024 bytes, so not easy to > > be found. > > > > Chipidea bug too? Does it follow ch 8.5.3.2 Variable-length Data Stage, USB 2.0 spec?
wait, this is a chipidea core ? Why aren't you guys using the chipidea driver yet ? You need to switch over to that driver dude, we can't have duplicated code in the tree.
I'm sorry, but I won't be taking this series, please use chipidea driver, it should be very simple to add a glue layer for your core to the chipidea driver.
-- balbi [unhandled content-type:application/pgp-signature] |  |