[OpenBIOS] usb driver to support usb keyboard

[Tarl Neustaedter]

Have you looked at Openfirmware's Forth USB driver?

http://tracker.coreboot.org/trac/openfirmware/browser/dev/usb2

It's USB2, ehci, uhci and ohci (that last for USB1 also). Doesn't have 
xhci for USB3, though.

It works on big-endian, this is the driver that Sun's implementation is 
based on.

On 2014-May-2, 06:59 , BALATON Zoltan wrote:
> Hello,
>
> I'm trying to improve the emulation of new world Macs (mac99) in QEMU 
> and noticed that OpenBIOS does not support usb keyboards thus it 
> currently cannot be used with qemu-system-ppc64 -machine mac99 and 
> still uses an ADB keyboard for new world G4 mac that usually have USB 
> keyboards. Because of this I have looked at adding a usb driver to 
> OpenBIOS.
>
> I was looking for other open source drivers to adapt but most I could 
> find were GPLv3 (Grub), LGPLv3 (SeaBios) which are incompatible with 
> the current OpenBIOS license or too difficult to adapt (Linux). This 
> mostly left the driver in Coreboot's libpayload library 
> (http://review.coreboot.org/gitweb?p=coreboot.git;a=tree;f=payloads/libpayload/drivers/usb) 
> which is BSD licensed that I gave a try. It wasn't too difficult to 
> port to OpenBIOS but when I tried to use it it turned out that it does 
> not handle the device being little endian on a big endian host and 
> thus does not work correctly with ppc (but it might work on little 
> endian hosts, I didn't test that; Coreboot libpayload seems to only 
> support x86 and armv7.)
>
> Fixing this is a bit tedious that I don't feel like doing now, I'd 
> rather work on other problems towards my goal of running MorphOS on 
> QEMU instead but I'd like to share the results so far in case someone 
> wants to look at it, has any idea how to easily fix the endianness 
> problem or maybe help with finishing it. Or if someone knows about 
> another simple boot time driver that could be adapted instead and 
> works correctly on big endian hosts please let me know.
>
> The current work in progress version can be found here: 
> http://goliat.eik.bme.hu/~balaton/openbios-usbhid-driver-wip.tar.xz
>
> Any comments/help are welcome.