drivers/media/pci/mgb4/mgb4_core.c

File Facts

System

Linux kernel

Corpus path

drivers/media/pci/mgb4/mgb4_core.c

Extension

.c

Size

18120 bytes

Lines

716

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.
• 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.
• 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/types.h
• linux/module.h
• linux/pci.h
• linux/platform_device.h
• linux/clk.h
• linux/clk-provider.h
• linux/clkdev.h
• linux/i2c.h
• linux/delay.h
• linux/dma/amd_xdma.h
• linux/platform_data/amd_xdma.h
• linux/spi/xilinx_spi.h
• linux/mtd/mtd.h
• linux/hwmon.h
• linux/debugfs.h
• mgb4_dma.h
• mgb4_i2c.h
• mgb4_sysfs.h
• mgb4_vout.h
• mgb4_vin.h
• mgb4_trigger.h
• mgb4_core.h

Detected Declarations

• function temp_is_visible
• function temp_read
• function temp_read_string
• function match_i2c_adap
• function match_spi_adap
• function init_spi
• function free_spi
• function init_i2c
• function free_i2c
• function get_serial_number
• function get_module_version
• function MGB4_IS_GMSL3
• function map_regs
• function init_xdma
• function free_xdma
• function mgb4_probe
• function mgb4_remove

Annotated Snippet

static struct pci_driver mgb4_pci_driver = {
	.name = KBUILD_MODNAME,
	.id_table = mgb4_pci_ids,
	.probe = mgb4_probe,
	.remove = mgb4_remove,
};

module_pci_driver(mgb4_pci_driver);

MODULE_AUTHOR("Digiteq Automotive s.r.o.");
MODULE_DESCRIPTION("Digiteq Automotive MGB4 Driver");
MODULE_LICENSE("GPL");
MODULE_SOFTDEP("pre: platform:xiic-i2c platform:xilinx_spi spi-nor");

Annotation

• Immediate include surface: `linux/types.h`, `linux/module.h`, `linux/pci.h`, `linux/platform_device.h`, `linux/clk.h`, `linux/clk-provider.h`, `linux/clkdev.h`, `linux/i2c.h`.
• Detected declarations: `function temp_is_visible`, `function temp_read`, `function temp_read_string`, `function match_i2c_adap`, `function match_spi_adap`, `function init_spi`, `function free_spi`, `function init_i2c`, `function free_i2c`, `function get_serial_number`.
• Atlas domain: Driver Families / drivers/media.
• Implementation status: pattern 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.