drivers/video/fbdev/atafb.c

File Facts

System

Linux kernel

Corpus path

drivers/video/fbdev/atafb.c

Extension

.c

Size

88709 bytes

Lines

3189

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 user memory; correctness depends on fault-safe copying and privilege boundary handling.
• 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/kernel.h
• linux/errno.h
• linux/string.h
• linux/mm.h
• linux/delay.h
• linux/init.h
• linux/interrupt.h
• linux/platform_device.h
• asm/setup.h
• linux/uaccess.h
• asm/irq.h
• asm/io.h
• asm/atarihw.h
• asm/atariints.h
• asm/atari_stram.h
• linux/fb.h
• asm/atarikb.h
• c2p.h
• atafb.h

Detected Declarations

• struct falcon_hw
• enum cardtype
• function get_video_mode
• function tt_encode_fix
• function tt_decode_var
• function tt_encode_var
• function tt_get_par
• function tt_set_par
• function tt_setcolreg
• function tt_detect
• function hxx_prescale
• function falcon_encode_fix
• function falcon_decode_var
• function falcon_encode_var
• function falcon_get_par
• function falcon_set_par
• function falcon_vbl_switcher
• function falcon_pan_display
• function falcon_setcolreg
• function falcon_blank
• function falcon_detect
• function stste_encode_fix
• function stste_decode_var
• function stste_encode_var
• function stste_get_par
• function stste_set_par
• function stste_setcolreg
• function stste_detect
• function stste_set_screen_base
• function st_ovsc_switch
• function ext_encode_fix
• function ext_decode_var
• function ext_encode_var
• function ext_get_par
• function ext_set_par
• function ext_setcolreg
• function ext_detect
• function set_screen_base
• function pan_display
• function ata_get_par
• function ata_set_par
• function do_fb_set_var
• function register_framebuffer
• function atafb_get_var
• function atafb_set_disp
• function atafb_pan_display
• function atafb_fillrect
• function atafb_copyarea

Annotated Snippet

device_initcall(atafb_init);

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/errno.h`, `linux/string.h`, `linux/mm.h`, `linux/delay.h`, `linux/init.h`, `linux/interrupt.h`, `linux/platform_device.h`.
• Detected declarations: `struct falcon_hw`, `enum cardtype`, `function get_video_mode`, `function tt_encode_fix`, `function tt_decode_var`, `function tt_encode_var`, `function tt_get_par`, `function tt_set_par`, `function tt_setcolreg`, `function tt_detect`.
• Atlas domain: Driver Families / drivers/video.
• Implementation status: integration implementation candidate.
• This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.
• 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.