sound/aoa/soundbus/i2sbus/core.c

File Facts

System

Linux kernel

Corpus path

sound/aoa/soundbus/i2sbus/core.c

Extension

.c

Size

12490 bytes

Lines

463

Domain

Driver Families

Bucket

sound/aoa

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.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• 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/module.h
• linux/slab.h
• linux/pci.h
• linux/interrupt.h
• linux/dma-mapping.h
• linux/of.h
• linux/of_address.h
• linux/of_irq.h
• sound/core.h
• asm/macio.h
• asm/dbdma.h
• ../soundbus.h
• i2sbus.h

Detected Declarations

• function alloc_dbdma_descriptor_ring
• function free_dbdma_descriptor_ring
• function i2sbus_release_dev
• function i2sbus_bus_intr
• function node
• function i2sbus_add_dev
• function i2sbus_probe
• function for_each_child_of_node
• function i2sbus_remove
• function i2sbus_suspend
• function list_for_each_entry
• function i2sbus_resume
• function list_for_each_entry
• function list_for_each_entry
• function i2sbus_shutdown
• function soundbus_i2sbus_init
• function soundbus_i2sbus_exit
• module init soundbus_i2sbus_init

Annotated Snippet

module_init(soundbus_i2sbus_init);
module_exit(soundbus_i2sbus_exit);

Annotation

• Immediate include surface: `linux/module.h`, `linux/slab.h`, `linux/pci.h`, `linux/interrupt.h`, `linux/dma-mapping.h`, `linux/of.h`, `linux/of_address.h`, `linux/of_irq.h`.
• Detected declarations: `function alloc_dbdma_descriptor_ring`, `function free_dbdma_descriptor_ring`, `function i2sbus_release_dev`, `function i2sbus_bus_intr`, `function node`, `function i2sbus_add_dev`, `function i2sbus_probe`, `function for_each_child_of_node`, `function i2sbus_remove`, `function i2sbus_suspend`.
• Atlas domain: Driver Families / sound/aoa.
• Implementation status: integration 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.