drivers/media/usb/em28xx/em28xx-audio.c

File Facts

System

Linux kernel

Corpus path

drivers/media/usb/em28xx/em28xx-audio.c

Extension

.c

Size

24688 bytes

Lines

976

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.
• 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

• em28xx.h
• linux/kernel.h
• linux/usb.h
• linux/init.h
• linux/sound.h
• linux/spinlock.h
• linux/soundcard.h
• linux/slab.h
• linux/module.h
• sound/core.h
• sound/pcm.h
• sound/pcm_params.h
• sound/info.h
• sound/initval.h
• sound/control.h
• sound/tlv.h
• sound/ac97_codec.h
• media/v4l2-common.h

Detected Declarations

• function em28xx_deinit_isoc_audio
• function em28xx_audio_isocirq
• function em28xx_init_audio_isoc
• function snd_em28xx_capture_open
• function snd_em28xx_pcm_close
• function snd_em28xx_prepare
• function audio_trigger
• function snd_em28xx_capture_trigger
• function snd_em28xx_capture_pointer
• function em28xx_vol_info
• function em28xx_vol_put
• function em28xx_vol_get
• function em28xx_vol_put_mute
• function em28xx_vol_get_mute
• function em28xx_cvol_new
• function em28xx_audio_free_urb
• function em28xx_audio_ep_packet_size
• function em28xx_audio_urb_init
• function em28xx_audio_init
• function em28xx_audio_fini
• function em28xx_audio_suspend
• function em28xx_audio_resume
• function em28xx_alsa_register
• function em28xx_alsa_unregister
• module init em28xx_alsa_register

Annotated Snippet

module_init(em28xx_alsa_register);
module_exit(em28xx_alsa_unregister);

Annotation

• Immediate include surface: `em28xx.h`, `linux/kernel.h`, `linux/usb.h`, `linux/init.h`, `linux/sound.h`, `linux/spinlock.h`, `linux/soundcard.h`, `linux/slab.h`.
• Detected declarations: `function em28xx_deinit_isoc_audio`, `function em28xx_audio_isocirq`, `function em28xx_init_audio_isoc`, `function snd_em28xx_capture_open`, `function snd_em28xx_pcm_close`, `function snd_em28xx_prepare`, `function audio_trigger`, `function snd_em28xx_capture_trigger`, `function snd_em28xx_capture_pointer`, `function em28xx_vol_info`.
• Atlas domain: Driver Families / drivers/media.
• 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.