Re: xHCI driver

[Andrei Borzenkov]

25.11.2016 15:43, Bjørn Forsman пишет:
> Hi GRUB developers,
> 
> My name is Bjørn Forsman, first time poster. I've been tasked to make
> an xHCI driver for GRUB at my $dayjob. The end goal is to have smart
> card (CCID) reader functionality. We already have a working CCID
> driver on top of EHCI. I have no prior experience with xHCI (nor EHCI
> for that matter), so this is quite the learning experience :-)
> 

What platforms do you target? Note that on most platforms grub relies on
firmware services to access devices, so those direct hardware access
drivers simply are not used.

> I looked in the GRUB mailing list archive and found a couple of old
> threads about xHCI[1], but it looks like there has never been an
> attempt at writing that driver.
> 
> Some questions:
> 
> * Is there interest in xHCI driver for GRUB? If so I can post patches
> when there is something that works (more or less).
> 
> * I see the iPXE project has an xHCI driver. Any thoughts on using
> that as a basis? I'm a bit unsure about the licensing, whether iPXE is
> GPLv2 *only* or "at your option, any later version". I guess if it's
> GPLv2+ it is compatible with GRUB's GPLv3+, or else not. Correct?
> 
> Best regards,
> Bjørn Forsman
> 
> [1]: The "xhci support?" thread from 2012 and "[PATCH]: xHCI/EHCI -
> Windows - BIOS bug interaction." from late 2013 which added a quirk
> for an Intel controller.
> 
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