Update/include some functions from the Kernel

[Sascha Hauer]

On Thu, Jul 17, 2014 at 11:29:07AM +0200, Sebastian Hesselbarth wrote:
> On 07/17/2014 07:33 AM, Sascha Hauer wrote:
> >On Thu, Jul 17, 2014 at 01:15:33AM +0200, Sebastian Hesselbarth wrote:
> >>On 07/15/2014 03:49 PM, Sascha Hauer wrote:
> >>>This adds/updates some lowlevel bitmap/bitop stuff from the
> >>>Kernel. Needed by upcoming USB updates.
> >>
> >>Sascha,
> >>
> >>just curious what "USB updates" there are?
> >
> >The updates are only USB core related, like turning the hub driver into
> >a device and make fix up the USB device hierarchy. The other stuff is
> >USB gadget specific: Update to v3.15 and composite gadget support
> 
> Ok, for the xHCI driver, I am about to bring up the ports. But AFAKT,
> it will be basically fine to reuse the EHCI hub code. The way data is
> sent later, is different from EHCI. I still have to dig into both xHCI
> and EHCI code and specs to be sure about it.
> 
> BTW, if USB2.0 is a reasonable fallback for both, xHCI devices and HC,
> I guess it should be fine to just support the 2.0 stuff.
> 
> Up to now, I already stumbled upon some legacy stuff (from u-boot?),
> e.g. USB_SPEED defines vs enum, struct usb_{config,interface}_descriptor
> collusion.

I have patches for these issues already in my series. I'll post it soon.

Sascha

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