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Kernel: Add boot parameter to determine i8042 first port translation

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This can be used mainly for bare metal hardware, if the user experiences
problems with output from the PS2 keyboard.
This commit is contained in:
Liav A 2023-04-13 11:06:52 +03:00 • committed by Andrew Kaster
parent c8f27d7cb8
commit 475ef6965a
4 changed files with 17 additions and 1 deletions
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4
Base/usr/share/man/man7/boot_parameters.md
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@ -67,6 +67,10 @@ has set up before booting the Kernel, don't initialize any driver.
**`none`** - Assume there's no i8042 controller in the system.
**`force`** - Assume there's i8042 controller in the system.
* **`i8042_first_port_translation`** - This parameter expects **`on`** or **`off`** and is by default set to **`off`**.
When set to **`off`**, the kernel will not enable first PS2 port translation.
When set to **`on`**, the kernel will enable first PS2 port translation.
* **`panic`** - This parameter expects **`halt`** or **`shutdown`**. This is particularly useful in CI contexts.
* **`pci`** - This parameter expects **`ecam`**, **`io`** or **`none`**. When selecting **`none`**

10
Kernel/Boot/CommandLine.cpp
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@ -131,6 +131,16 @@ UNMAP_AFTER_INIT bool CommandLine::is_early_boot_console_disabled() const
PANIC("Unknown early_boot_console setting: {}", value);
}
UNMAP_AFTER_INIT bool CommandLine::i8042_enable_first_port_translation() const
{
auto value = lookup("i8042_first_port_translation"sv).value_or("off"sv);
if (value == "off"sv)
return false;
if (value == "on"sv)
return true;
PANIC("Unknown i8042_enable_first_port_translation setting: {}", value);
}
UNMAP_AFTER_INIT I8042PresenceMode CommandLine::i8042_presence_mode() const
{
auto value = lookup("i8042_presence_mode"sv).value_or("auto"sv);

1
Kernel/Boot/CommandLine.h
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@ -82,6 +82,7 @@ public:
[[nodiscard]] bool is_pci_disabled() const;
[[nodiscard]] bool is_legacy_time_enabled() const;
[[nodiscard]] bool is_pc_speaker_enabled() const;
[[nodiscard]] bool i8042_enable_first_port_translation() const;
[[nodiscard]] GraphicsSubsystemMode graphics_subsystem_mode() const;
[[nodiscard]] I8042PresenceMode i8042_presence_mode() const;
[[nodiscard]] bool is_force_pio() const;

3
Kernel/Devices/HID/Management.cpp
View file

@ -167,7 +167,8 @@ UNMAP_AFTER_INIT ErrorOr<void> HIDManagement::enumerate()
// Note: If we happen to not have i8042 just return "gracefully" for now.
if (!has_i8042_controller)
return {};
if (auto result_or_error = i8042_controller->detect_devices(I8042Controller::EnableKeyboardFirstPortTranslation::No); result_or_error.is_error())
auto i8042_enable_first_port_translation = kernel_command_line().i8042_enable_first_port_translation() ? I8042Controller::EnableKeyboardFirstPortTranslation::Yes : I8042Controller::EnableKeyboardFirstPortTranslation::No;
if (auto result_or_error = i8042_controller->detect_devices(i8042_enable_first_port_translation); result_or_error.is_error())
return {};
m_hid_serial_io_controllers.with([&](auto& list) {
list.append(i8042_controller);