sound/hda/common/beep.c

File Facts

System

Linux kernel

Corpus path

sound/hda/common/beep.c

Extension

.c

Size

8384 bytes

Lines

346

Domain

Driver Families

Bucket

sound/hda

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.
• 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/input.h
• linux/slab.h
• linux/workqueue.h
• linux/export.h
• sound/core.h
• hda_beep.h
• hda_local.h

Detected Declarations

• function generate_tone
• function snd_hda_generate_beep
• function beep_linear_tone
• function beep_standard_tone
• function snd_hda_beep_event
• function turn_on_beep
• function turn_off_beep
• function snd_hda_enable_beep_device
• function beep_dev_register
• function beep_dev_disconnect
• function beep_dev_free
• function snd_hda_attach_beep_device
• function snd_hda_detach_beep_device
• function ctl_has_mute
• function snd_hda_mixer_amp_switch_get_beep
• function snd_hda_mixer_amp_switch_put_beep
• export snd_hda_enable_beep_device
• export snd_hda_attach_beep_device
• export snd_hda_detach_beep_device
• export snd_hda_mixer_amp_switch_get_beep
• export snd_hda_mixer_amp_switch_put_beep

Annotated Snippet

if (chs & 1) {
			enable |= *valp;
			valp++;
		}
		if (chs & 2)
			enable |= *valp;
		snd_hda_enable_beep_device(codec, enable);
	}
	if (!ctl_has_mute(kcontrol))
		return 0;
	return snd_hda_mixer_amp_switch_put(kcontrol, ucontrol);
}
EXPORT_SYMBOL_GPL(snd_hda_mixer_amp_switch_put_beep);

Annotation

• Immediate include surface: `linux/input.h`, `linux/slab.h`, `linux/workqueue.h`, `linux/export.h`, `sound/core.h`, `hda_beep.h`, `hda_local.h`.
• Detected declarations: `function generate_tone`, `function snd_hda_generate_beep`, `function beep_linear_tone`, `function beep_standard_tone`, `function snd_hda_beep_event`, `function turn_on_beep`, `function turn_off_beep`, `function snd_hda_enable_beep_device`, `function beep_dev_register`, `function beep_dev_disconnect`.
• Atlas domain: Driver Families / sound/hda.
• Implementation status: integration implementation candidate.

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.