drivers/input/serio/i8042.c

File Facts

System

Linux kernel

Corpus path

drivers/input/serio/i8042.c

Extension

.c

Size

38761 bytes

Lines

1665

Domain

Driver Families

Bucket

drivers/input

Inferred role

Driver Families: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/types.h
• linux/delay.h
• linux/export.h
• linux/module.h
• linux/interrupt.h
• linux/ioport.h
• linux/init.h
• linux/serio.h
• linux/err.h
• linux/rcupdate.h
• linux/platform_device.h
• linux/i8042.h
• linux/slab.h
• linux/suspend.h
• linux/property.h
• asm/io.h
• i8042.h

Detected Declarations

• struct i8042_port
• enum i8042_controller_reset_mode
• function i8042_set_reset
• function i8042_lock_chip
• function i8042_unlock_chip
• function i8042_install_filter
• function i8042_remove_filter
• function i8042_wait_read
• function i8042_wait_write
• function i8042_flush
• function i8042_command
• function i8042_command
• function i8042_kbd_write
• function i8042_aux_write
• function i8042_port_close
• function i8042_start
• function i8042_stop
• function scoped_guard
• function i8042_filter
• function i8042_handle_mux
• function i8042_handle_data
• function scoped_guard
• function i8042_interrupt
• function i8042_enable_kbd_port
• function AUX
• function i8042_enable_mux_ports
• function Multiplexed
• function i8042_check_mux
• function i8042_aux_test_irq
• function i8042_toggle_aux
• function i8042_check_aux
• function keyboard
• function scoped_guard
• function i8042_controller_check
• function i8042_controller_selftest
• function i8042_controller_init
• function scoped_guard
• function i8042_controller_reset
• function i8042_panic_blink
• function i8042_dritek_enable
• function i8042_controller_resume
• function i8042_pm_suspend
• function i8042_pm_resume_noirq
• function i8042_pm_resume
• function i8042_pm_thaw
• function i8042_pm_reset
• function i8042_pm_restore
• function i8042_shutdown

Annotated Snippet

module_init(i8042_init);
module_exit(i8042_exit);

Annotation

• Immediate include surface: `linux/types.h`, `linux/delay.h`, `linux/export.h`, `linux/module.h`, `linux/interrupt.h`, `linux/ioport.h`, `linux/init.h`, `linux/serio.h`.
• Detected declarations: `struct i8042_port`, `enum i8042_controller_reset_mode`, `function i8042_set_reset`, `function i8042_lock_chip`, `function i8042_unlock_chip`, `function i8042_install_filter`, `function i8042_remove_filter`, `function i8042_wait_read`, `function i8042_wait_write`, `function i8042_flush`.
• Atlas domain: Driver Families / drivers/input.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.