Am 28. Oktober 2023 23:56:21 UTC schrieb BALATON Zoltan <bala...@eik.bme.hu>:
>This is going back to my otiginal proposal in
>https://patchew.org/QEMU/cover.1677004414.git.bala...@eik.bme.hu/
>implementing routing of interrupts from device functions and PCI
>devices to ISA interrupts. On pegasos2 the firmware sets evertyhing to
>share IRQ 9 so the current simpified version worked for taht but with
>the amigaone machine its firmware makes use of this feature and
>assigns different interrupts to functions and PCI devices so we need
>to properly impelent this. Since any ISA interrupt can be controlled
>by any interrupt source (different functions of the multifunction
>device plus the 4 input pins from PCI devices) there are more than 4
>possible sources so this can't be handled by just the 4 PCI interrupt
>lines. We need to keep track of the state of each interrupt source to
>be able to determine the level of the ISA interrupt and avoid one
>device clearing it while other still has an interrupt.
>
>This fixes USB on amigaone and maybe other bugs not discovered yet.
Amigaone's U-Boot maps the PCI IRQ pins to PIC IRQs 7,9,10,11. IRQ 7 seems to
be the parallel port on ISA machines. The VIA hardware disables it by default
(see index e2 in superio configuration registers) while it is enabled by
default in our device models. Does this maybe cause an IRQ conflict, making the
USB function unusable?
Best regards,
Bernhard
>
>Regards,
>BALATON Zoltan
>
>BALATON Zoltan (4):
> hw/isa/vt82c686: Bring back via_isa_set_irq()
> hw/usb/vt82c686-uhci-pci: Use ISA instead of PCI interrupts
> hw/isa/vt82c686: Route PIRQ inputs using via_isa_set_irq()
> hw/audio/via-ac97: Route interrupts using via_isa_set_irq()
>
> hw/audio/via-ac97.c | 8 ++---
> hw/isa/vt82c686.c | 67 +++++++++++++++++++++++---------------
> hw/usb/vt82c686-uhci-pci.c | 9 +++++
> include/hw/isa/vt82c686.h | 2 ++
> 4 files changed, 56 insertions(+), 30 deletions(-)
>
