sound/pci/emu10k1/emu10k1x.c

File Facts

System

Linux kernel

Corpus path

sound/pci/emu10k1/emu10k1x.c

Extension

.c

Size

45218 bytes

Lines

1534

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/init.h
• linux/interrupt.h
• linux/pci.h
• linux/dma-mapping.h
• linux/slab.h
• linux/string.h
• linux/module.h
• sound/core.h
• sound/initval.h
• sound/pcm.h
• sound/ac97_codec.h
• sound/info.h
• sound/rawmidi.h

Detected Declarations

• struct emu10k1x_voice
• struct emu10k1x_pcm
• struct emu10k1x_midi
• struct emu10k1x
• function snd_emu10k1x_ptr_read
• function snd_emu10k1x_ptr_write
• function snd_emu10k1x_intr_enable
• function snd_emu10k1x_intr_disable
• function snd_emu10k1x_gpio_write
• function snd_emu10k1x_pcm_free_substream
• function snd_emu10k1x_pcm_interrupt
• function snd_emu10k1x_playback_open
• function snd_emu10k1x_playback_close
• function snd_emu10k1x_pcm_hw_params
• function snd_emu10k1x_pcm_hw_free
• function snd_emu10k1x_pcm_prepare
• function snd_emu10k1x_pcm_trigger
• function snd_emu10k1x_pcm_pointer
• function snd_emu10k1x_pcm_open_capture
• function snd_emu10k1x_pcm_close_capture
• function snd_emu10k1x_pcm_hw_params_capture
• function snd_emu10k1x_pcm_hw_free_capture
• function snd_emu10k1x_pcm_prepare_capture
• function snd_emu10k1x_pcm_trigger_capture
• function snd_emu10k1x_pcm_pointer_capture
• function snd_emu10k1x_ac97_read
• function snd_emu10k1x_ac97_write
• function snd_emu10k1x_ac97
• function snd_emu10k1x_free
• function snd_emu10k1x_interrupt
• function snd_emu10k1x_pcm
• function snd_emu10k1x_create
• function snd_emu10k1x_proc_reg_read
• function snd_emu10k1x_proc_reg_write
• function snd_emu10k1x_proc_init
• function snd_emu10k1x_shared_spdif_get
• function snd_emu10k1x_shared_spdif_put
• function snd_emu10k1x_spdif_info
• function snd_emu10k1x_spdif_get
• function snd_emu10k1x_spdif_get_mask
• function snd_emu10k1x_spdif_put
• function snd_emu10k1x_mixer
• function mpu401_read
• function mpu401_write
• function mpu401_clear_rx
• function do_emu10k1x_midi_interrupt
• function scoped_guard
• function scoped_guard

Annotated Snippet

static struct pci_driver emu10k1x_driver = {
	.name = KBUILD_MODNAME,
	.id_table = snd_emu10k1x_ids,
	.probe = snd_emu10k1x_probe,
};

module_pci_driver(emu10k1x_driver);

Annotation

• Immediate include surface: `linux/init.h`, `linux/interrupt.h`, `linux/pci.h`, `linux/dma-mapping.h`, `linux/slab.h`, `linux/string.h`, `linux/module.h`, `sound/core.h`.
• Detected declarations: `struct emu10k1x_voice`, `struct emu10k1x_pcm`, `struct emu10k1x_midi`, `struct emu10k1x`, `function snd_emu10k1x_ptr_read`, `function snd_emu10k1x_ptr_write`, `function snd_emu10k1x_intr_enable`, `function snd_emu10k1x_intr_disable`, `function snd_emu10k1x_gpio_write`, `function snd_emu10k1x_pcm_free_substream`.
• 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.