On Tue, Aug 9, 2016 at 6:06 AM, Benjamin Herrenschmidt < b...@kernel.crashing.org> wrote:
> On Tue, 2016-08-09 at 03:31 +0200, BALATON Zoltan wrote: > > > > > Because PowerBooks do (or rather a PMU-simulation of ADB) and MacOS > > > doesn't care. If ADB is in the device-tree, it will use it. It makes > > > things easier to support multiple combinations especially when > > > "comparing" things for debug. > > > > > > Additionally, USB doesn't work well in OpenBIOS at this point ;-) > > > > In what way? Keyboard works. What else is needed? > > Doesnt' work for me half of the time, I haven't dug into why yet. > > > > Also, I have some evil plan to change the way ADB autopoll works in > > > Qemu so that the devices signal the PMU when they want to talk. That > > > will avoid having yet another 30-something HZ timer ticking in qemu, > > > and in that regard will probably be more efficient (read: slows down > > > the emulator less) than OHCI. > > > > OK, this is a really nice thing and justifies having an ADB bus. (This > > would also likely fix mouse problems seen by others.) > > Possibly ;-) The tracking in OS 9 at least is still done by a timer > inside MacOS itself. With my latest ndrv it's running at 30Hz. I'm > looking at maybe doing some kind of paravirt hack to make it adaptative > on whether there is actual movement on the cursor, but that's for later. > > > > Why not ? > > > > Just thought emulating all the additional details for Powerbook power > > management might be difficult. But if you're willing to go there I won't > > stop you. :-) Obviously you understand this very well so maybe it's not > > that difficult for you. > > Well, I wrote most of the corresponding Linux code so it's mostly a matter > of swapping that knowledge back into my brain from lossy long term storage > and finding all the MacOS 9 bugs along the way :-) > > > > > > > > > Here's an (untested) patch for > > > > switching to using USB keyboard and mouse instead of ADB unless USB > is > > > > disabled. (The device tree should be changed accordingly in > OpenBIOS.) Not > > > > sure if this is helpful. > > > > > > Don't bother just yet, as I said, I am reworking all of that code. I > will > > > probably just create various -machine options so you can chose what > bits > > > and pieces you want to put togeher, ie, CUDA, PMU, with or without ADB, > > > which machine model string to expose to the OS etc... > > > > Cool, looking forward to it. Thanks for all the great stuff you did for > > this and keep it up. > > Cheers, > Ben. > > Openbios has problems with the USB keyboard when one specifically defines e.g., -device ich9-usb-uhci1,id=newusb -device usb-mouse,bus=newusb.0 (which is needed to get mouse/keyboard going in OSX 10.5)
