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Kernel: Bypass PS2 detection if scancode set is forced

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Bananymous
2025-04-01 22:57:54 +03:00
parent 27613da5ea
commit aebacb6b6a
2 changed files with 22 additions and 8 deletions
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19
kernel/kernel/Input/PS2/Controller.cpp
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@@ -240,12 +240,21 @@ namespace Kernel::Input
BAN::ErrorOr<void> PS2Controller::initialize_impl(uint8_t scancode_set)
{
// Determine if the PS/2 Controller Exists
auto* fadt = static_cast<const ACPI::FADT*>(ACPI::ACPI::get().get_header("FACP"_sv, 0));
if (fadt && fadt->revision > 1 && !(fadt->iapc_boot_arch & (1 << 1)))
constexpr size_t iapc_flag_off = offsetof(ACPI::FADT, iapc_boot_arch);
constexpr size_t iapc_flag_end = iapc_flag_off + sizeof(ACPI::FADT::iapc_boot_arch);
// If user provided scan code set, skip FADT detection
if (scancode_set == 0xFF)
scancode_set = 0;
else if (scancode_set == 0)
{
dwarnln_if(DEBUG_PS2, "No PS/2 available");
return BAN::Error::from_errno(ENODEV);
// Determine if the PS/2 Controller Exists
auto* fadt = static_cast<const ACPI::FADT*>(ACPI::ACPI::get().get_header("FACP"_sv, 0));
if (fadt && fadt->revision >= 3 && fadt->length >= iapc_flag_end && !(fadt->iapc_boot_arch & (1 << 1)))
{
dwarnln_if(DEBUG_PS2, "No PS/2 available");
return BAN::Error::from_errno(ENODEV);
}
}
// Disable Devices