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Kernel/USB: Add a rudimentary interrogation only EHCI driver

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This adds a simple EHCI driver that currently only interrogates the
device and checks if all ports are addressable via associated legacy
controllers (companion controllers), and warns if this is not the case.

This also adds a lot of the other data structures needed for actually
driving the controller, but these are currently not hooked up to
anything.

To test this run with `SERENITY_EXTRA_QEMU_ARGS="--device usb-ehci"`
or the q35 machine type
This commit is contained in:
Hendiadyoin1 2023-12-13 21:59:03 +01:00 • committed by Andrew Kaster
parent a768685d16
commit f4bfd0468b
6 changed files with 742 additions and 1 deletions
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5
Kernel/Bus/USB/USBManagement.cpp
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@ -9,6 +9,7 @@
#include <Kernel/Boot/CommandLine.h>
#include <Kernel/Bus/PCI/API.h>
#include <Kernel/Bus/PCI/Definitions.h>
#include <Kernel/Bus/USB/EHCI/EHCIController.h>
#include <Kernel/Bus/USB/UHCI/UHCIController.h>
#include <Kernel/Bus/USB/USBManagement.h>
#include <Kernel/FileSystem/SysFS/Subsystems/Bus/USB/BusDirectory.h>
@ -48,7 +49,9 @@ UNMAP_AFTER_INIT void USBManagement::enumerate_controllers()
dmesgln("USBManagement: OHCI controller found at {} is not currently supported.", device_identifier.address());
return;
case EHCI:
dmesgln("USBManagement: EHCI controller found at {} is not currently supported.", device_identifier.address());
dmesgln("USBManagement: EHCI controller found at {} is currently not fully supported.", device_identifier.address());
if (auto ehci_controller_or_error = EHCI::EHCIController::try_to_initialize(device_identifier); !ehci_controller_or_error.is_error())
m_controllers.append(ehci_controller_or_error.release_value());
return;
case xHCI:
dmesgln("USBManagement: xHCI controller found at {} is not currently supported.", device_identifier.address());