Passthrough for USB 2.0 controller for Windows XP

[Ibanez343]

I've been trying to passthrough a USB controller to Windows XP for months and have yet to find a solution.  I've tried a few PCI cards (using a PCI to PCIe adapter as seen in SpaceInvaderOne's Windows 98 VM Video) as well as a PCIe USB 2.0 card (not many on the market but they do exist).  The problem I have is, every USB 2.0 controller I've tried shows up as 3 or 4 devices and gives various errors depending on how I pass them through.  I will include a picture of the cards for reference.

IOMMU group 19:	[104c:8231] 07:00.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200A PCI Express-to-PCI Bridge (rev 03)
[1033:0035] 08:01.0 USB controller: NEC Corporation OHCI USB Controller (rev 43)
[1033:0035] 08:01.1 USB controller: NEC Corporation OHCI USB Controller (rev 43)
[1033:00e0] 08:01.2 USB controller: NEC Corporation uPD72010x USB 2.0 Controller (rev 04)

The above example is the PCIe USB 2.0 card.  It has an extra device for the PCIe to PCI conversion onboard.  I don't like using the PCI adapter I have (Pictured below) because it makes the machine turn on the moment it is plugged in and starts it back up a few seconds after a shutdown.  I would assume that I need to stub and passthrough the 3 bottom devices but this gives an error

 

internal error: qemu unexpectedly closed the monitor: 2020-06-14T05:24:56.533104Z qemu-system-x86_64: -device vfio-pci,host=0000:08:01.0,id=hostdev2,bus=pci.0,addr=0x6: vfio 0000:08:01.0: Failed to set up TRIGGER eventfd signaling for interrupt INTX-0: VFIO_DEVICE_SET_IRQS failure: Device or resource busy

I've also tried stubbing the PCIe to PCI bridge and passing it through but this gives a different error (I don't remember the exact error but I shouldn't need to do this).  I've successfully used the PCIe to PCI adaptor to passthrough a dual serial port card as well as a few other PCI cards and didn't have any issues.  I will continue to try different configurations to see if I can find a solution but I'm feeling pretty stuck at this point.

 

Why do I need a dedicated USB controller for a windows XP VM?  I want to use it to program old Lego Mindstorms microcontrollers using official software as well as playing old games.  I want dedicated USB ports (for hot-swapping devices) as well as dedicated hardware serial ports (I had no issues passing through and installing drivers for the serial controller but haven't had a chance to test with serial devices)

 

 

The PCIe to PCI adapter

 

 

Some of the USB 2.0 controllers I've tried

 

 

The result of watching too much Linus Tech Tips