drivers/media/pci/tw686x/tw686x-core.c

File Facts

System

Linux kernel

Corpus path

drivers/media/pci/tw686x/tw686x-core.c

Extension

.c

Size

12697 bytes

Lines

453

Domain

Driver Families

Bucket

drivers/media

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.
• 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/init.h
• linux/interrupt.h
• linux/delay.h
• linux/kernel.h
• linux/module.h
• linux/pci_ids.h
• linux/slab.h
• linux/timer.h
• tw686x.h
• tw686x-regs.h

Detected Declarations

• function tw686x_dma_mode_get
• function tw686x_dma_mode_set
• function tw686x_disable_channel
• function tw686x_enable_channel
• function CPU
• function tw686x_reset_channels
• function tw686x_irq
• function tw686x_dev_release
• function tw686x_probe
• function tw686x_remove

Annotated Snippet

static struct pci_driver tw686x_pci_driver = {
	.name = "tw686x",
	.id_table = tw686x_pci_tbl,
	.probe = tw686x_probe,
	.remove = tw686x_remove,
};
module_pci_driver(tw686x_pci_driver);

MODULE_DESCRIPTION("Driver for video frame grabber cards based on Intersil/Techwell TW686[4589]");
MODULE_AUTHOR("Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>");
MODULE_AUTHOR("Krzysztof Ha?asa <khalasa@piap.pl>");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/init.h`, `linux/interrupt.h`, `linux/delay.h`, `linux/kernel.h`, `linux/module.h`, `linux/pci_ids.h`, `linux/slab.h`, `linux/timer.h`.
• Detected declarations: `function tw686x_dma_mode_get`, `function tw686x_dma_mode_set`, `function tw686x_disable_channel`, `function tw686x_enable_channel`, `function CPU`, `function tw686x_reset_channels`, `function tw686x_irq`, `function tw686x_dev_release`, `function tw686x_probe`, `function tw686x_remove`.
• Atlas domain: Driver Families / drivers/media.
• 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.