drivers/media/pci/saa7134/saa7134-core.c

File Facts

System

Linux kernel

Corpus path

drivers/media/pci/saa7134/saa7134-core.c

Extension

.c

Size

41486 bytes

Lines

1525

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.
• 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.
• 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

• saa7134.h
• saa7134-reg.h
• linux/init.h
• linux/list.h
• linux/module.h
• linux/kernel.h
• linux/slab.h
• linux/kmod.h
• linux/sound.h
• linux/interrupt.h
• linux/delay.h
• linux/mutex.h
• linux/dma-mapping.h
• linux/pm.h

Detected Declarations

• function saa7134_track_gpio
• function saa7134_set_gpio
• function request_module_async
• function request_submodules
• function flush_request_submodules
• function saa7134_buffer_pages
• function saa7134_buffer_count
• function saa7134_buffer_startpage
• function saa7134_buffer_base
• function saa7134_pgtable_alloc
• function saa7134_pgtable_build
• function saa7134_pgtable_free
• function saa7134_buffer_queue
• function saa7134_buffer_finish
• function saa7134_buffer_next
• function saa7134_buffer_timeout
• function saa7134_stop_streaming
• function saa7134_set_dmabits
• function print_irqstatus
• function saa7134_irq
• function saa7134_hw_enable1
• function saa7134_hwinit1
• function saa7134_hw_enable2
• function saa7134_hwinit2
• function saa7134_hwfini
• function must_configure_manually
• function saa7134_unregister_media_device
• function saa7134_media_release
• function saa7134_create_entities
• function saa7134_unregister_video
• function mpeg_ops_attach
• function mpeg_ops_detach
• function saa7134_initdev
• function pci_resource_len
• function saa7134_finidev
• function saa7134_buffer_requeue
• function saa7134_suspend
• function saa7134_resume
• function saa7134_ts_register
• function saa7134_ts_unregister
• function saa7134_init
• function saa7134_fini
• module init saa7134_init
• export saa7134_devlist_lock
• export saa7134_devlist
• export saa7134_stop_streaming
• export saa7134_ts_register
• export saa7134_ts_unregister

Annotated Snippet

static struct pci_driver saa7134_pci_driver = {
	.name     = "saa7134",
	.id_table = saa7134_pci_tbl,
	.probe    = saa7134_initdev,
	.remove   = saa7134_finidev,
	.driver.pm = &saa7134_pm_ops,
};

static int __init saa7134_init(void)
{
	pr_info("saa7130/34: v4l2 driver version %s loaded\n",
	       SAA7134_VERSION);
	return pci_register_driver(&saa7134_pci_driver);
}

static void __exit saa7134_fini(void)
{
	pci_unregister_driver(&saa7134_pci_driver);
}

module_init(saa7134_init);
module_exit(saa7134_fini);

/* ----------------------------------------------------------- */

EXPORT_SYMBOL(saa7134_set_gpio);
EXPORT_SYMBOL(saa7134_boards);

/* ----------------- for the DMA sound modules --------------- */

EXPORT_SYMBOL(saa7134_dmasound_init);
EXPORT_SYMBOL(saa7134_dmasound_exit);
EXPORT_SYMBOL(saa7134_pgtable_free);
EXPORT_SYMBOL(saa7134_pgtable_build);
EXPORT_SYMBOL(saa7134_pgtable_alloc);
EXPORT_SYMBOL(saa7134_set_dmabits);

Annotation

• Immediate include surface: `saa7134.h`, `saa7134-reg.h`, `linux/init.h`, `linux/list.h`, `linux/module.h`, `linux/kernel.h`, `linux/slab.h`, `linux/kmod.h`.
• Detected declarations: `function saa7134_track_gpio`, `function saa7134_set_gpio`, `function request_module_async`, `function request_submodules`, `function flush_request_submodules`, `function saa7134_buffer_pages`, `function saa7134_buffer_count`, `function saa7134_buffer_startpage`, `function saa7134_buffer_base`, `function saa7134_pgtable_alloc`.
• Atlas domain: Driver Families / drivers/media.
• Implementation status: pattern implementation candidate.
• 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.