drivers/video/fbdev/ocfb.c

File Facts

System

Linux kernel

Corpus path

drivers/video/fbdev/ocfb.c

Extension

.c

Size

10274 bytes

Lines

429

Domain

Driver Families

Bucket

drivers/video

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.
• 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/delay.h
• linux/dma-mapping.h
• linux/errno.h
• linux/fb.h
• linux/init.h
• linux/io.h
• linux/kernel.h
• linux/mm.h
• linux/module.h
• linux/of.h
• linux/platform_device.h
• linux/string.h
• linux/slab.h

Detected Declarations

• struct ocfb_dev
• function ocfb_setup
• function ocfb_readreg
• function ocfb_writereg
• function ocfb_setupfb
• function ocfb_setcolreg
• function ocfb_init_fix
• function ocfb_init_var
• function ocfb_probe
• function ocfb_remove
• function ocfb_init
• function ocfb_exit
• module init ocfb_init

Annotated Snippet

module_init(ocfb_init);
module_exit(ocfb_exit);

MODULE_AUTHOR("Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>");
MODULE_DESCRIPTION("OpenCores VGA/LCD 2.0 frame buffer driver");
MODULE_LICENSE("GPL v2");
module_param(mode_option, charp, 0);
MODULE_PARM_DESC(mode_option, "Video mode ('<xres>x<yres>[-<bpp>][@refresh]')");

Annotation

• Immediate include surface: `linux/delay.h`, `linux/dma-mapping.h`, `linux/errno.h`, `linux/fb.h`, `linux/init.h`, `linux/io.h`, `linux/kernel.h`, `linux/mm.h`.
• Detected declarations: `struct ocfb_dev`, `function ocfb_setup`, `function ocfb_readreg`, `function ocfb_writereg`, `function ocfb_setupfb`, `function ocfb_setcolreg`, `function ocfb_init_fix`, `function ocfb_init_var`, `function ocfb_probe`, `function ocfb_remove`.
• Atlas domain: Driver Families / drivers/video.
• Implementation status: integration 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.