Low and full speed USB devices that are attached directly to an EHCI port
have to be handled by a companion controller (either UHCI or OHCI). We hand
over ports when we detect a low or full speed device is attached by setting
the Port Owner bit in the Port Status and Control register. However some AMD
companion controllers fail to detect the device after this has been done.
Resetting the EHCI controller works around this quirk.
This fixes issue #6 and issue #71.
Previously every second transfer was dropped. We didn't notice, because
they were normally key release events, which we ignored anyway. However
the new keyboard report handler needs to see the release events.
A USB keyboard may return key codes in any of the 6 key code array
positions (issue #48). So we have to compare the latest report to
the previous one to detect new key presses and handle rollover. As
the same change is needed for all HCI types, factor out the common
code into the base driver.
* Improve abstraction in vmem.h and limit memory benchmarking to first 2GB.
The third GB may get used for remapping memory regions that are only
accessed during startup, so it's not safe to use it for the memory
speed tests.
* Fix calculation of end limit for locating memory benchmark workspace.
* Document vmem.h.
* Use window number, not current start address, to detect first window.
* Increase the program low-load range from 1MB to 4MB and make more robust.
If the BIOS has reserved some parts of low memory, there may not be
enough contiguous space left to load the program there (issue #49).
So increase the low-load range to include the first 3MB of high
memory. Also guard against the program being initially loaded
straddling the new boundary.
Co-authored-by: Martin Whitaker <memtest@martin-whitaker.me.uk>
The SiS OHCI controller ignores writes to its FmInterval and PeriodicStart
registers when in SUSPEND state, so delay initialisation of these registers
until after we start the controller running.
If the usbdebug option is present, pause at the end of the USB scan until
a key is pressed. Otherwise, if the keyboard=usb option is present and no
USB keyboards were discovered, pause for 10 seconds. Otherwise don't pause.
When an interrupt transfer completes, the UHCI loads the QELP in the
QH with the link pointer from the TD (which is a null pointer in this
case). We need to set the QELP back to point at the TD to enable the
next interrupt transfer.
This gets us to the point that a keyboard is detected when running
QEMU with a EHCI/UHCI combination controller and the first keypress
is detected and returned.
Sam Demeulemeester
Sam Demeulemeester
Martin Whitaker
Sam Demeulemeester
Lionel Debroux
martinwhitakerandMartin Whitaker