sound/pci/ad1889.c

File Facts

System

Linux kernel

Corpus path

sound/pci/ad1889.c

Extension

.c

Size

23599 bytes

Lines

919

Domain

Driver Families

Bucket

sound/pci

Inferred role

Driver Families: operation-table or driver-model contract

Status

pattern 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.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• 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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/init.h
• linux/pci.h
• linux/dma-mapping.h
• linux/slab.h
• linux/interrupt.h
• linux/compiler.h
• linux/delay.h
• linux/module.h
• linux/io.h
• sound/core.h
• sound/pcm.h
• sound/initval.h
• sound/ac97_codec.h
• ad1889.h
• ac97/ac97_id.h

Detected Declarations

• struct ad1889_register_state
• struct snd_ad1889
• function ad1889_readw
• function ad1889_writew
• function ad1889_readl
• function ad1889_writel
• function ad1889_unmute
• function ad1889_mute
• function ad1889_load_adc_buffer_address
• function ad1889_load_adc_buffer_count
• function ad1889_load_adc_interrupt_count
• function ad1889_load_wave_buffer_address
• function ad1889_load_wave_buffer_count
• function ad1889_load_wave_interrupt_count
• function ad1889_channel_reset
• function snd_ad1889_ac97_read
• function snd_ad1889_ac97_write
• function snd_ad1889_ac97_ready
• function snd_ad1889_playback_open
• function snd_ad1889_capture_open
• function snd_ad1889_playback_close
• function snd_ad1889_capture_close
• function snd_ad1889_playback_prepare
• function snd_ad1889_capture_prepare
• function snd_ad1889_playback_trigger
• function snd_ad1889_capture_trigger
• function snd_ad1889_playback_pointer
• function snd_ad1889_capture_pointer
• function snd_ad1889_interrupt
• function snd_ad1889_pcm_init
• function snd_ad1889_proc_read
• function snd_ad1889_proc_init
• function snd_ad1889_ac97_xinit
• function snd_ad1889_ac97_init
• function snd_ad1889_free
• function snd_ad1889_create
• function __snd_ad1889_probe
• function snd_ad1889_probe

Annotated Snippet

static struct pci_driver ad1889_pci_driver = {
	.name = KBUILD_MODNAME,
	.id_table = snd_ad1889_ids,
	.probe = snd_ad1889_probe,
};

module_pci_driver(ad1889_pci_driver);

Annotation

• Immediate include surface: `linux/init.h`, `linux/pci.h`, `linux/dma-mapping.h`, `linux/slab.h`, `linux/interrupt.h`, `linux/compiler.h`, `linux/delay.h`, `linux/module.h`.
• Detected declarations: `struct ad1889_register_state`, `struct snd_ad1889`, `function ad1889_readw`, `function ad1889_writew`, `function ad1889_readl`, `function ad1889_writel`, `function ad1889_unmute`, `function ad1889_mute`, `function ad1889_load_adc_buffer_address`, `function ad1889_load_adc_buffer_count`.
• Atlas domain: Driver Families / sound/pci.
• Implementation status: pattern 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.