drivers/media/pci/cx88/cx88-alsa.c

File Facts

System

Linux kernel

Corpus path

drivers/media/pci/cx88/cx88-alsa.c

Extension

.c

Size

23786 bytes

Lines

1010

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

• cx88.h
• cx88-reg.h
• linux/module.h
• linux/init.h
• linux/delay.h
• linux/device.h
• linux/interrupt.h
• linux/vmalloc.h
• linux/dma-mapping.h
• linux/pci.h
• linux/slab.h
• sound/core.h
• sound/pcm.h
• sound/pcm_params.h
• sound/control.h
• sound/initval.h
• sound/tlv.h
• media/i2c/wm8775.h

Detected Declarations

• struct cx88_audio_buffer
• struct cx88_audio_dev
• function _cx88_start_audio_dma
• function _cx88_stop_audio_dma
• function cx8801_aud_irq
• function cx8801_irq
• function cx88_alsa_dma_init
• function cx88_alsa_dma_map
• function cx88_alsa_dma_unmap
• function cx88_alsa_dma_free
• function dsp_buffer_free
• function snd_cx88_pcm_open
• function snd_cx88_close
• function snd_cx88_hw_params
• function snd_cx88_hw_free
• function snd_cx88_prepare
• function snd_cx88_card_trigger
• function snd_cx88_pointer
• function callback
• function snd_cx88_pcm
• function snd_cx88_volume_info
• function snd_cx88_volume_get
• function snd_cx88_wm8775_volume_put
• function snd_cx88_volume_put
• function snd_cx88_switch_get
• function snd_cx88_switch_put
• function snd_cx88_alc_get
• function snd_cx88_alc_put
• function snd_cx88_free
• function snd_cx88_dev_free
• function snd_cx88_create
• function cx88_audio_initdev
• function cx88_audio_finidev

Annotated Snippet

static struct pci_driver cx88_audio_pci_driver = {
	.name     = "cx88_audio",
	.id_table = cx88_audio_pci_tbl,
	.probe    = cx88_audio_initdev,
	.remove   = cx88_audio_finidev,
};

module_pci_driver(cx88_audio_pci_driver);

Annotation

• Immediate include surface: `cx88.h`, `cx88-reg.h`, `linux/module.h`, `linux/init.h`, `linux/delay.h`, `linux/device.h`, `linux/interrupt.h`, `linux/vmalloc.h`.
• Detected declarations: `struct cx88_audio_buffer`, `struct cx88_audio_dev`, `function _cx88_start_audio_dma`, `function _cx88_stop_audio_dma`, `function cx8801_aud_irq`, `function cx8801_irq`, `function cx88_alsa_dma_init`, `function cx88_alsa_dma_map`, `function cx88_alsa_dma_unmap`, `function cx88_alsa_dma_free`.
• 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.