drivers/input/misc/cm109.c

File Facts

System

Linux kernel

Corpus path

drivers/input/misc/cm109.c

Extension

.c

Size

24571 bytes

Lines

941

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.
• 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/kernel.h
• linux/init.h
• linux/slab.h
• linux/module.h
• linux/moduleparam.h
• linux/rwsem.h
• linux/usb/input.h

Detected Declarations

• struct cm109_ctl_packet
• struct cm109_dev
• struct driver_info
• function special_keymap
• function keymap_kip1000
• function keymap_gtalk
• function keymap_usbph01
• function keymap_atcom
• function report_key
• function presses
• function cm109_submit_buzz_toggle
• function cm109_submit_ctl
• function cm109_urb_irq_callback
• function cm109_urb_ctl_callback
• function cm109_toggle_buzzer_async
• function cm109_toggle_buzzer_sync
• function cm109_stop_traffic
• function cm109_restore_state
• function cm109_input_open
• function scoped_guard
• function cm109_input_close
• function scoped_guard
• function cm109_input_ev
• function cm109_usb_cleanup
• function cm109_usb_disconnect
• function cm109_usb_probe
• function cm109_usb_suspend
• function cm109_usb_resume
• function cm109_usb_pre_reset
• function cm109_usb_post_reset
• function cm109_select_keymap
• function cm109_init
• function cm109_exit
• module init cm109_init

Annotated Snippet

module_init(cm109_init);
module_exit(cm109_exit);

MODULE_DEVICE_TABLE(usb, cm109_usb_table);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/init.h`, `linux/slab.h`, `linux/module.h`, `linux/moduleparam.h`, `linux/rwsem.h`, `linux/usb/input.h`.
• Detected declarations: `struct cm109_ctl_packet`, `struct cm109_dev`, `struct driver_info`, `function special_keymap`, `function keymap_kip1000`, `function keymap_gtalk`, `function keymap_usbph01`, `function keymap_atcom`, `function report_key`, `function presses`.
• 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.

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.