drivers/media/radio/radio-cadet.c

File Facts

System

Linux kernel

Corpus path

drivers/media/radio/radio-cadet.c

Extension

.c

Size

16828 bytes

Lines

680

Domain

Driver Families

Bucket

drivers/media

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.
• Touches user memory; correctness depends on fault-safe copying and privilege boundary handling.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/module.h
• linux/init.h
• linux/ioport.h
• linux/delay.h
• linux/videodev2.h
• linux/param.h
• linux/pnp.h
• linux/sched.h
• linux/io.h
• media/v4l2-device.h
• media/v4l2-ioctl.h
• media/v4l2-ctrls.h
• media/v4l2-fh.h
• media/v4l2-event.h

Detected Declarations

• struct cadet
• function cadet_getstereo
• function cadet_gettune
• function cadet_getfreq
• function cadet_settune
• function cadet_setfreq
• function cadet_has_rds_data
• function cadet_handler
• function cadet_start_rds
• function cadet_read
• function vidioc_querycap
• function vidioc_g_tuner
• function vidioc_s_tuner
• function vidioc_enum_freq_bands
• function vidioc_g_frequency
• function vidioc_s_frequency
• function cadet_s_ctrl
• function cadet_open
• function cadet_release
• function cadet_poll
• function cadet_pnp_probe
• function cadet_probe
• function isapnp
• function cadet_exit
• module init cadet_init

Annotated Snippet

module_init(cadet_init);
module_exit(cadet_exit);

Annotation

• Immediate include surface: `linux/module.h`, `linux/init.h`, `linux/ioport.h`, `linux/delay.h`, `linux/videodev2.h`, `linux/param.h`, `linux/pnp.h`, `linux/sched.h`.
• Detected declarations: `struct cadet`, `function cadet_getstereo`, `function cadet_gettune`, `function cadet_getfreq`, `function cadet_settune`, `function cadet_setfreq`, `function cadet_has_rds_data`, `function cadet_handler`, `function cadet_start_rds`, `function cadet_read`.
• Atlas domain: Driver Families / drivers/media.
• Implementation status: integration implementation candidate.
• This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.
• 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.