kpsmousedis a driver in the Linux kernel to support PS/2 mouse devices. It is responsible for handling PS/2 mouse input events and converting them into data readable by user space.
The underlying principles are as follows:
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Driver loading: When the PS/2 mouse device is connected to the computer, the kernel will load
kpsmousedthe driver. -
Device initialization: The driver will establish communication with the PS/2 mouse device and send initialization commands to configure the device.
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Input event handling: Once the mouse device is initialized, it starts sending input events (such as mouse moves, key presses, etc.).
kpsmousedDrivers are responsible for receiving these input events. -
Interrupt handling:
kpsmousedUse interrupts to asynchronously receive data sent by the PS/2 mouse device. When the mouse device has a new input event, it will trigger an interrupt signal to notify the kernel to execute the corresponding interrupt handler. -
Data parsing: In the interrupt handler,
kpsmousedthe driver will read and parse the data sent by the PS/2 mouse device. It will identify the type and content of the data packet to determine the moving direction of the mouse, key state and other information. -
Event delivery: Once input events are parsed,
kpsmousedthe driver forwards them to the kernel's input subsystem./dev/input/miceIn this way, user-space applications (such as window managers, desktop environments, etc.) can obtain mouse input events by reading specific device files (eg .
Linux provides support for PS/2 mouse devices through kpsmouseddrivers. Its underlying principles include communication with mouse devices, interrupt handling, data parsing, and event delivery to ensure that mouse input events can be correctly handled by applications in user space.