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Kernel: Introduce a new HID subsystem
The end goal of this commit is to allow to boot on bare metal with no PS/2 device connected to the system. It turned out that the original code relied on the existence of the PS/2 keyboard, so VirtualConsole called it even though ACPI indicated the there's no i8042 controller on my real machine because I didn't plug any PS/2 device. The code is much more flexible, so adding HID support for other type of hardware (e.g. USB HID) could be much simpler. Briefly describing the change, we have a new singleton called HIDManagement, which is responsible to initialize the i8042 controller if exists, and to enumerate its devices. I also abstracted a bit things, so now every Human interface device is represented with the HIDDevice class. Then, there are 2 types of it - the MouseDevice and KeyboardDevice classes; both are responsible to handle the interface in the DevFS. PS2KeyboardDevice, PS2MouseDevice and VMWareMouseDevice classes are responsible for handling the hardware-specific interface they are assigned to. Therefore, they are inheriting from the IRQHandler class.
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23 changed files with 942 additions and 410 deletions
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@ -34,7 +34,7 @@
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#include <Kernel/DMI.h>
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#include <Kernel/Devices/BXVGADevice.h>
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#include <Kernel/Devices/FullDevice.h>
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#include <Kernel/Devices/I8042Controller.h>
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#include <Kernel/Devices/HID/HIDManagement.h>
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#include <Kernel/Devices/MBVGADevice.h>
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#include <Kernel/Devices/MemoryDevice.h>
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#include <Kernel/Devices/NullDevice.h>
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@ -163,7 +163,6 @@ extern "C" UNMAP_AFTER_INIT [[noreturn]] void init()
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ACPI::initialize();
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VFS::initialize();
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I8042Controller::initialize();
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Console::initialize();
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dmesgln("Starting SerenityOS...");
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@ -179,6 +178,8 @@ extern "C" UNMAP_AFTER_INIT [[noreturn]] void init()
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new SerialDevice(SERIAL_COM3_ADDR, 66);
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new SerialDevice(SERIAL_COM4_ADDR, 67);
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VMWareBackdoor::the(); // don't wait until first mouse packet
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HIDManagement::initialize();
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VirtualConsole::initialize();
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tty0 = new VirtualConsole(0);
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for (unsigned i = 1; i < s_max_virtual_consoles; i++) {
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@ -295,7 +296,6 @@ void init_stage2(void*)
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new RandomDevice;
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PTYMultiplexer::initialize();
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SB16::detect();
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VMWareBackdoor::the(); // don't wait until first mouse packet
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StorageManagement::initialize(kernel_command_line().root_device(), kernel_command_line().is_force_pio());
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if (!VFS::the().mount_root(StorageManagement::the().root_filesystem())) {
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