sound/pci/als4000.c

File Facts

System

Linux kernel

Corpus path

sound/pci/als4000.c

Extension

.c

Size

29338 bytes

Lines

974

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.
• 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/io.h
• linux/init.h
• linux/pci.h
• linux/gameport.h
• linux/module.h
• linux/dma-mapping.h
• sound/core.h
• sound/pcm.h
• sound/rawmidi.h
• sound/mpu401.h
• sound/opl3.h
• sound/sb.h
• sound/initval.h

Detected Declarations

• struct snd_card_als4000
• enum als4k_iobase_t
• enum als4k_iobase_0e_t
• enum als4k_gcr_t
• enum als4k_gcr8c_t
• enum als4k_cr_t
• enum als4k_cr0_t
• function snd_als4k_iobase_writeb
• function snd_als4k_iobase_writel
• function snd_als4k_iobase_readb
• function snd_als4k_iobase_readl
• function snd_als4k_gcr_write_addr
• function snd_als4k_gcr_write
• function snd_als4k_gcr_read_addr
• function snd_als4k_gcr_read
• function snd_als4_cr_write
• function snd_als4_cr_read
• function snd_als4000_set_rate
• function snd_als4000_set_capture_dma
• function snd_als4000_set_playback_dma
• function snd_als4000_get_format
• function snd_als4000_capture_prepare
• function scoped_guard
• function snd_als4000_playback_prepare
• function snd_als4000_capture_trigger
• function snd_als4000_playback_trigger
• function snd_als4000_capture_pointer
• function scoped_guard
• function snd_als4000_playback_pointer
• function scoped_guard
• function register
• function scoped_guard
• function snd_als4000_playback_open
• function snd_als4000_playback_close
• function snd_als4000_capture_open
• function snd_als4000_capture_close
• function snd_als4000_pcm
• function snd_als4000_set_addr
• function snd_als4000_configure
• function snd_als4000_create_gameport
• function snd_als4000_free_gameport
• function snd_als4000_create_gameport
• function snd_als4000_free_gameport
• function __snd_card_als4000_probe
• function snd_card_als4000_probe
• function snd_als4000_suspend
• function snd_als4000_resume

Annotated Snippet

static struct pci_driver als4000_driver = {
	.name = KBUILD_MODNAME,
	.id_table = snd_als4000_ids,
	.probe = snd_card_als4000_probe,
	.driver = {
		.pm = &snd_als4000_pm,
	},
};

module_pci_driver(als4000_driver);

Annotation

• Immediate include surface: `linux/io.h`, `linux/init.h`, `linux/pci.h`, `linux/gameport.h`, `linux/module.h`, `linux/dma-mapping.h`, `sound/core.h`, `sound/pcm.h`.
• Detected declarations: `struct snd_card_als4000`, `enum als4k_iobase_t`, `enum als4k_iobase_0e_t`, `enum als4k_gcr_t`, `enum als4k_gcr8c_t`, `enum als4k_cr_t`, `enum als4k_cr0_t`, `function snd_als4k_iobase_writeb`, `function snd_als4k_iobase_writel`, `function snd_als4k_iobase_readb`.
• Atlas domain: Driver Families / sound/pci.
• Implementation status: pattern implementation candidate.
• 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.