drivers/video/fbdev/pm3fb.c

Source file repositories/reference/linux-study-clean/drivers/video/fbdev/pm3fb.c

File Facts

System
Linux kernel
Corpus path
drivers/video/fbdev/pm3fb.c
Extension
.c
Size
43200 bytes
Lines
1579
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.

Dependency Surface

Detected Declarations

Annotated Snippet

static struct pci_driver pm3fb_driver = {
	.name =		"pm3fb",
	.id_table =	pm3fb_id_table,
	.probe =	pm3fb_probe,
	.remove =	pm3fb_remove,
};

MODULE_DEVICE_TABLE(pci, pm3fb_id_table);

#ifndef MODULE
	/*
	 *  Setup
	 */

/*
 * Only necessary if your driver takes special options,
 * otherwise we fall back on the generic fb_setup().
 */
static int __init pm3fb_setup(char *options)
{
	char *this_opt;

	/* Parse user specified options (`video=pm3fb:') */
	if (!options || !*options)
		return 0;

	while ((this_opt = strsep(&options, ",")) != NULL) {
		if (!*this_opt)
			continue;
		else if (!strncmp(this_opt, "noaccel", 7))
			noaccel = 1;
		else if (!strncmp(this_opt, "hwcursor=", 9))
			hwcursor = simple_strtoul(this_opt + 9, NULL, 0);
		else if (!strncmp(this_opt, "nomtrr", 6))
			nomtrr = 1;
		else
			mode_option = this_opt;
	}
	return 0;
}
#endif /* MODULE */

static int __init pm3fb_init(void)
{
	/*
	 *  For kernel boot options (in 'video=pm3fb:<options>' format)
	 */
#ifndef MODULE
	char *option = NULL;
#endif

	if (fb_modesetting_disabled("pm3fb"))
		return -ENODEV;

#ifndef MODULE
	if (fb_get_options("pm3fb", &option))
		return -ENODEV;
	pm3fb_setup(option);
#endif

	return pci_register_driver(&pm3fb_driver);
}

#ifdef MODULE
static void __exit pm3fb_exit(void)
{
	pci_unregister_driver(&pm3fb_driver);
}

module_exit(pm3fb_exit);
#endif
module_init(pm3fb_init);

module_param(mode_option, charp, 0);
MODULE_PARM_DESC(mode_option, "Initial video mode e.g. '648x480-8@60'");
module_param(noaccel, bool, 0);
MODULE_PARM_DESC(noaccel, "Disable acceleration");
module_param(hwcursor, int, 0644);
MODULE_PARM_DESC(hwcursor, "Enable hardware cursor "
			"(1=enable, 0=disable, default=1)");
module_param(nomtrr, bool, 0);
MODULE_PARM_DESC(nomtrr, "Disable MTRR support (0 or 1=disabled) (default=0)");

MODULE_DESCRIPTION("Permedia3 framebuffer device driver");
MODULE_LICENSE("GPL");

Annotation

Implementation Notes