Hi, On Fri, Oct 19, 2012 at 12:46:48PM +0200, Christoph Fritz wrote: > On Fri, 2012-10-19 at 13:30 +0300, Felipe Balbi wrote: > > On Fri, Oct 19, 2012 at 12:24:43PM +0200, Christoph Fritz wrote: > > > USB controller may access a wrong address for the dTD (endpoint transfer > > > descriptor) and then hang. This happens a lot when doing tests with > > > g_ether module and iperf, a tool for measuring maximum TCP and UDP > > > bandwidth. > > > > > > This hardware bug is explained in detail by errata number 2858 for i.MX23: > > > http://cache.freescale.com/files/dsp/doc/errata/IMX23CE.pdf > > > > > > All (?) SOCs with an IP from chipidea suffer from this problem. > > > mv_udc_core fixes this bug by commit daec765. There still may be > > > unfixed drivers. > > > > why aren't you using that driver instead ? Is it really necessary to > > keep this driver around ? I would really like to see uniformization > > towards that, if you use the same IP, then the same driver ought to > > suffice. > > > > What's the reason for not using drivers/usb/chipidea ? > > > > I thought about this too but wasn't able to use chipidea with > MXC_EHCI_INTERNAL_PHY as it's called in fsl_udc. that's a matter of writing the PHY driver, right ;-) It has nothing to do with chipidea, actually :-) -- balbi
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