drivers/media/pci/cx18/cx18-alsa-main.c

Source file repositories/reference/linux-study-clean/drivers/media/pci/cx18/cx18-alsa-main.c

File Facts

System: Linux kernel
Corpus path: drivers/media/pci/cx18/cx18-alsa-main.c
Extension: .c
Size: 6396 bytes
Lines: 275
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.
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/slab.h
linux/module.h
linux/kernel.h
linux/device.h
linux/spinlock.h
media/v4l2-device.h
sound/core.h
sound/initval.h
cx18-driver.h
cx18-version.h
cx18-alsa.h
cx18-alsa-pcm.h

Detected Declarations

function snd_cx18_card_free
function snd_cx18_card_private_free
function snd_cx18_card_create
function snd_cx18_card_set_names
function snd_cx18_init
function cx18_alsa_load
function cx18_alsa_init
function snd_cx18_exit
function cx18_alsa_exit_callback
function cx18_alsa_exit
module init cx18_alsa_init

Annotated Snippet

struct device_driver *drv;
	int ret;

	printk(KERN_INFO "cx18-alsa: module unloading...\n");

	drv = driver_find("cx18", &pci_bus_type);
	ret = driver_for_each_device(drv, NULL, NULL, cx18_alsa_exit_callback);
	(void)ret;	/* suppress compiler warning */

	cx18_ext_init = NULL;
	printk(KERN_INFO "cx18-alsa: module unload complete\n");
}

module_init(cx18_alsa_init);
module_exit(cx18_alsa_exit);

Annotation

Immediate include surface: `linux/init.h`, `linux/slab.h`, `linux/module.h`, `linux/kernel.h`, `linux/device.h`, `linux/spinlock.h`, `media/v4l2-device.h`, `sound/core.h`.
Detected declarations: `function snd_cx18_card_free`, `function snd_cx18_card_private_free`, `function snd_cx18_card_create`, `function snd_cx18_card_set_names`, `function snd_cx18_init`, `function cx18_alsa_load`, `function cx18_alsa_init`, `function snd_cx18_exit`, `function cx18_alsa_exit_callback`, `function cx18_alsa_exit`.
Atlas domain: Driver Families / drivers/media.
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.