Joseph Smith schrieb: >> We're pretty far with the UHCI stack in GRUB2. If you are looking for a >> USB project to jump on, we can certainly use help ;-) >> >> Initial keyboard support is there. MSC support is there, UHCI is there. >> >> Missing: Fixes, Testing, OHCI, EHCI, Fixes, Fixes, Testing... >> >> Maybe we can pack it into libpayload instead of GRUB2 too, so we can >> make it available to more payloads? >> It's clean code with no imports (though I got some clues from other sources, esp. as far as workarounds for chipset bugs are concerned, but it should be safe), so it's not bound to a license, and apart from grub_strcpy here and grub_uint32_t there, which can be sanitized easily, and some trivial pci controller detection logic, it's not very grub2 specific either. I merely develop it inside the grub2 tree because that's the most convenient for now. > Stefan, I would love to help out. I offered my services to Patrick a while > ago, with no response. > What can I do? > Oops, sorry! You seem to be only starting into USB now, but so did I when I started writing this code (which probably shows at places). I quickly collected a TODO:
For UHCI: - testing and fixes, lots of it - make more clever (eg. bulk transfer with >1 packet/ms, which might be done next week already) - fix some abstractions (eg. bulk transfer is at the wrong place currently) - improve interrupt transfer handling For OHCI: - create driver (most of UHCI doesn't apply here, because the chip is more clever. "fix some abstractions" definitely helps, though) For EHCI: - figure out how to gain control over a device from the USB1 controller (that will somehow interact with the USB1 driver) - PING/DATA2 protocol, microframes support - extend HUB driver, so it handles USB1 devices on a USB2 hub USB devices: - the keyboard driver is rather rudimentary - mouse doesn't exist - mass storage only likes few devices (high priority for me) - hub driver doesn't have proper device power management yet Get the code to run, figure out the design (sorry, no documentation yet - but ask me. The code can only become better that way), play with it, fix it for your hardware, ask questions, send/commit patches, ... On my personal TODO (after this %!$# northbridge works for me) is most of the UHCI stuff, and mass storage. Everything else is pretty much free for grabs (but it might be good to tell me so I don't step on your toes). OHCI and mouse are definitely not on my list for the short term, other usb device drivers also aren't. I also don't mind patches to any part of the code :-) Regards, Patrick Georgi -- coreboot mailing list [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
