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   DIR Return to: Driver development
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       #Post#: 9--------------------------------------------------
       Driver development
   DIR By: Ceo
       Date: May 31, 2026, 7:21 am
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       I have a task here it is: Implement USB Host Controller
       Detection
       Goal:
       Detect which USB controller the system has (UHCI, OHCI, EHCI, or
       XHCI) by scanning PCI devices.
       What the driver must do:
       Scan PCI bus for class code 0x0C (Serial Bus Controller)
       Check subclass 0x03 (USB Controller)
       Identify the controller type using the programming interface
       value
       Print one of the following:
       “UHCI controller found”
       “OHCI controller found”
       “EHCI controller found”
       “XHCI controller found”
       Requirements:
       Must use PCI config space reads
       Must NOT use libc
       Must run in QEMU
       Must not crash the kernel
       What to do:
       Create usb.c
       Add PCI scanning code
       Detect controller type
       Print the result to VGA
       Reply with your code when finished
       If someone already claimed this task, choose another one
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