sound/pci/cmipci.c

File Facts

System

Linux kernel

Corpus path

sound/pci/cmipci.c

Extension

.c

Size

99800 bytes

Lines

3294

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.
• 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/io.h
• linux/delay.h
• linux/interrupt.h
• linux/init.h
• linux/pci.h
• linux/slab.h
• linux/gameport.h
• linux/module.h
• linux/mutex.h
• sound/core.h
• sound/info.h
• sound/control.h
• sound/pcm.h
• sound/rawmidi.h
• sound/mpu401.h
• sound/opl3.h
• sound/sb.h
• sound/asoundef.h
• sound/initval.h

Detected Declarations

• struct cmipci_pcm
• struct cmipci_mixer_auto_switches
• struct cmipci
• struct cmipci_sb_reg
• struct cmipci_switch_args
• function snd_cmipci_write
• function snd_cmipci_read
• function snd_cmipci_write_w
• function snd_cmipci_read_w
• function snd_cmipci_write_b
• function snd_cmipci_read_b
• function snd_cmipci_set_bit
• function snd_cmipci_clear_bit
• function snd_cmipci_set_bit_b
• function snd_cmipci_clear_bit_b
• function snd_cmipci_rate_freq
• function snd_cmipci_pll_rmn
• function CM_REG_FUNCTRL1
• function snd_cmipci_playback2_hw_params
• function snd_cmipci_ch_reset
• function set_dac_channels
• function snd_cmipci_pcm_prepare
• function snd_cmipci_pcm_trigger
• function snd_cmipci_pcm_pointer
• function snd_cmipci_playback_trigger
• function snd_cmipci_playback_pointer
• function snd_cmipci_capture_trigger
• function snd_cmipci_capture_pointer
• function snd_cmipci_spdif_default_info
• function snd_cmipci_spdif_default_get
• function snd_cmipci_spdif_default_put
• function snd_cmipci_spdif_mask_info
• function snd_cmipci_spdif_mask_get
• function snd_cmipci_spdif_stream_info
• function snd_cmipci_spdif_stream_get
• function snd_cmipci_spdif_stream_put
• function save_mixer_state
• function restore_mixer_state
• function setup_ac3
• function setup_spdif_playback
• function snd_cmipci_playback_prepare
• function snd_cmipci_playback_spdif_prepare
• function snd_cmipci_silence_hack
• function scoped_guard
• function scoped_guard
• function snd_cmipci_playback_hw_free
• function snd_cmipci_playback2_hw_free
• function snd_cmipci_capture_prepare

Annotated Snippet

static struct pci_driver cmipci_driver = {
	.name = KBUILD_MODNAME,
	.id_table = snd_cmipci_ids,
	.probe = snd_cmipci_probe,
	.driver = {
		.pm = &snd_cmipci_pm,
	},
};
	
module_pci_driver(cmipci_driver);

Annotation

• Immediate include surface: `linux/io.h`, `linux/delay.h`, `linux/interrupt.h`, `linux/init.h`, `linux/pci.h`, `linux/slab.h`, `linux/gameport.h`, `linux/module.h`.
• Detected declarations: `struct cmipci_pcm`, `struct cmipci_mixer_auto_switches`, `struct cmipci`, `struct cmipci_sb_reg`, `struct cmipci_switch_args`, `function snd_cmipci_write`, `function snd_cmipci_read`, `function snd_cmipci_write_w`, `function snd_cmipci_read_w`, `function snd_cmipci_write_b`.
• Atlas domain: Driver Families / sound/pci.
• 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.