drivers/video/fbdev/geode/lxfb_core.c

File Facts

System

Linux kernel

Corpus path

drivers/video/fbdev/geode/lxfb_core.c

Extension

.c

Size

17321 bytes

Lines

681

Domain

Driver Families

Bucket

drivers/video

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/aperture.h
• linux/module.h
• linux/kernel.h
• linux/errno.h
• linux/string.h
• linux/console.h
• linux/mm.h
• linux/suspend.h
• linux/delay.h
• linux/fb.h
• linux/init.h
• linux/pci.h
• linux/uaccess.h
• asm/olpc.h
• lxfb.h

Detected Declarations

• function get_modedb
• function lxfb_check_var
• function lxfb_set_par
• function chan_to_field
• function lxfb_setcolreg
• function lxfb_blank
• function lxfb_map_video_memory
• function lxfb_suspend
• function lxfb_resume
• function lxfb_probe
• function lxfb_remove
• function lxfb_setup
• function lxfb_init
• function lxfb_cleanup
• module init lxfb_init

Annotated Snippet

static struct pci_driver lxfb_driver = {
	.name		= "lxfb",
	.id_table	= lxfb_id_table,
	.probe		= lxfb_probe,
	.remove		= lxfb_remove,
	.driver.pm	= &lxfb_pm_ops,
};

#ifndef MODULE
static int __init lxfb_setup(char *options)
{
	char *opt;

	if (!options || !*options)
		return 0;

	while ((opt = strsep(&options, ",")) != NULL) {
		if (!*opt)
			continue;

		if (!strcmp(opt, "noclear"))
			noclear = 1;
		else if (!strcmp(opt, "nopanel"))
			nopanel = 1;
		else if (!strcmp(opt, "nocrt"))
			nocrt = 1;
		else
			mode_option = opt;
	}

	return 0;
}
#endif

static int __init lxfb_init(void)
{
#ifndef MODULE
	char *option = NULL;
#endif

	if (fb_modesetting_disabled("lxfb"))
		return -ENODEV;

#ifndef MODULE
	if (fb_get_options("lxfb", &option))
		return -ENODEV;

	lxfb_setup(option);
#endif
	return pci_register_driver(&lxfb_driver);
}
static void __exit lxfb_cleanup(void)
{
	pci_unregister_driver(&lxfb_driver);
}

module_init(lxfb_init);
module_exit(lxfb_cleanup);

module_param(mode_option, charp, 0);
MODULE_PARM_DESC(mode_option, "video mode (<x>x<y>[-<bpp>][@<refr>])");

module_param(vram, int, 0);
MODULE_PARM_DESC(vram, "video memory size");

module_param(vt_switch, int, 0);
MODULE_PARM_DESC(vt_switch, "enable VT switch during suspend/resume");

MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode LX");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/aperture.h`, `linux/module.h`, `linux/kernel.h`, `linux/errno.h`, `linux/string.h`, `linux/console.h`, `linux/mm.h`, `linux/suspend.h`.
• Detected declarations: `function get_modedb`, `function lxfb_check_var`, `function lxfb_set_par`, `function chan_to_field`, `function lxfb_setcolreg`, `function lxfb_blank`, `function lxfb_map_video_memory`, `function lxfb_suspend`, `function lxfb_resume`, `function lxfb_probe`.
• Atlas domain: Driver Families / drivers/video.
• Implementation status: pattern implementation candidate.

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.