sound/pci/es1938.c

File Facts

System

Linux kernel

Corpus path

sound/pci/es1938.c

Extension

.c

Size

53270 bytes

Lines

1782

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.
• 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/slab.h
• linux/gameport.h
• linux/module.h
• linux/delay.h
• linux/dma-mapping.h
• linux/io.h
• sound/core.h
• sound/control.h
• sound/pcm.h
• sound/opl3.h
• sound/mpu401.h
• sound/initval.h
• sound/tlv.h

Detected Declarations

• struct es1938
• function snd_es1938_mixer_write
• function snd_es1938_mixer_read
• function register
• function snd_es1938_write_cmd
• function snd_es1938_get_byte
• function snd_es1938_write
• function snd_es1938_read
• function snd_es1938_bits
• function snd_es1938_reset
• function snd_es1938_reset_fifo
• function snd_es1938_rate_set
• function snd_es1938_playback1_setdma
• function snd_es1938_playback2_setdma
• function snd_es1938_capture_setdma
• function snd_es1938_capture_trigger
• function snd_es1938_playback1_trigger
• function snd_es1938_playback2_trigger
• function snd_es1938_playback_trigger
• function snd_es1938_capture_prepare
• function snd_es1938_playback1_prepare
• function snd_es1938_playback2_prepare
• function snd_es1938_playback_prepare
• function snd_es1938_capture_pointer
• function snd_es1938_playback1_pointer
• function snd_es1938_playback2_pointer
• function snd_es1938_playback_pointer
• function snd_es1938_capture_copy
• function snd_es1938_capture_open
• function snd_es1938_playback_open
• function snd_es1938_capture_close
• function snd_es1938_playback_close
• function snd_es1938_new_pcm
• function snd_es1938_info_mux
• function snd_es1938_get_mux
• function snd_es1938_put_mux
• function snd_es1938_get_spatializer_enable
• function snd_es1938_put_spatializer_enable
• function snd_es1938_info_hw_volume
• function snd_es1938_get_hw_volume
• function snd_es1938_get_hw_switch
• function snd_es1938_hwv_free
• function snd_es1938_reg_bits
• function snd_es1938_reg_read
• function snd_es1938_info_single
• function snd_es1938_get_single
• function snd_es1938_put_single
• function snd_es1938_info_double

Annotated Snippet

static struct pci_driver es1938_driver = {
	.name = KBUILD_MODNAME,
	.id_table = snd_es1938_ids,
	.probe = snd_es1938_probe,
	.driver = {
		.pm = &es1938_pm,
	},
};

module_pci_driver(es1938_driver);

Annotation

• Immediate include surface: `linux/init.h`, `linux/interrupt.h`, `linux/pci.h`, `linux/slab.h`, `linux/gameport.h`, `linux/module.h`, `linux/delay.h`, `linux/dma-mapping.h`.
• Detected declarations: `struct es1938`, `function snd_es1938_mixer_write`, `function snd_es1938_mixer_read`, `function register`, `function snd_es1938_write_cmd`, `function snd_es1938_get_byte`, `function snd_es1938_write`, `function snd_es1938_read`, `function snd_es1938_bits`, `function snd_es1938_reset`.
• 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.