sound/pci/pcxhr/pcxhr.c

File Facts

System

Linux kernel

Corpus path

sound/pci/pcxhr/pcxhr.c

Extension

.c

Size

47480 bytes

Lines

1651

Domain

Driver Families

Bucket

sound/pci

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 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/init.h
• linux/interrupt.h
• linux/slab.h
• linux/pci.h
• linux/dma-mapping.h
• linux/delay.h
• linux/module.h
• linux/mutex.h
• sound/core.h
• sound/initval.h
• sound/info.h
• sound/control.h
• sound/pcm.h
• sound/pcm_params.h
• pcxhr.h
• pcxhr_mixer.h
• pcxhr_hwdep.h
• pcxhr_core.h
• pcxhr_mix22.h

Detected Declarations

• struct board_parameters
• function pcxhr_pll_freq_register
• function pcxhr_get_clock_reg
• function pcxhr_sub_set_clock
• function pcxhr_set_clock
• function pcxhr_sub_get_external_clock
• function pcxhr_get_external_clock
• function pcxhr_set_stream_state
• function pcxhr_set_format
• function pcxhr_update_r_buffer
• function pcxhr_pipe_sample_count
• function pcxhr_stream_scheduled_get_pipe
• function pcxhr_start_linked_stream
• function pcxhr_trigger
• function snd_pcm_group_for_each_entry
• function pcxhr_hardware_timer
• function pcxhr_prepare
• function pcxhr_hw_params
• function pcxhr_open
• function pcxhr_close
• function pcxhr_stream_pointer
• function pcxhr_create_pcm
• function pcxhr_chip_free
• function pcxhr_chip_dev_free
• function pcxhr_create
• function pcxhr_proc_info
• function pcxhr_proc_sync
• function pcxhr_proc_gpio_read
• function pcxhr_proc_gpo_write
• function pcxhr_proc_ltc
• function pcxhr_proc_init
• function pcxhr_free
• function pcxhr_probe
• function pcxhr_remove

Annotated Snippet

static struct pci_driver pcxhr_driver = {
	.name = KBUILD_MODNAME,
	.id_table = pcxhr_ids,
	.probe = pcxhr_probe,
	.remove = pcxhr_remove,
};

module_pci_driver(pcxhr_driver);

Annotation

• Immediate include surface: `linux/init.h`, `linux/interrupt.h`, `linux/slab.h`, `linux/pci.h`, `linux/dma-mapping.h`, `linux/delay.h`, `linux/module.h`, `linux/mutex.h`.
• Detected declarations: `struct board_parameters`, `function pcxhr_pll_freq_register`, `function pcxhr_get_clock_reg`, `function pcxhr_sub_set_clock`, `function pcxhr_set_clock`, `function pcxhr_sub_get_external_clock`, `function pcxhr_get_external_clock`, `function pcxhr_set_stream_state`, `function pcxhr_set_format`, `function pcxhr_update_r_buffer`.
• Atlas domain: Driver Families / sound/pci.
• Implementation status: pattern implementation candidate.
• 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.