sound/pci/rme9652/hdsp.c

File Facts

System

Linux kernel

Corpus path

sound/pci/rme9652/hdsp.c

Extension

.c

Size

149694 bytes

Lines

5376

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 user memory; correctness depends on fault-safe copying and privilege boundary handling.
• 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/delay.h
• linux/interrupt.h
• linux/pci.h
• linux/firmware.h
• linux/module.h
• linux/math64.h
• linux/vmalloc.h
• linux/io.h
• linux/nospec.h
• sound/core.h
• sound/control.h
• sound/pcm.h
• sound/info.h
• sound/asoundef.h
• sound/rawmidi.h
• sound/hwdep.h
• sound/initval.h
• sound/hdsp.h
• asm/byteorder.h
• asm/current.h

Detected Declarations

• struct hdsp_9632_meters
• struct hdsp_midi
• struct hdsp
• function snd_hammerfall_get_buffer
• function hdsp_playback_to_output_key
• function hdsp_input_to_output_key
• function hdsp_write
• function hdsp_read
• function hdsp_check_for_iobox
• function hdsp_wait_for_iobox
• function snd_hdsp_load_firmware_from_cache
• function hdsp_get_iobox_version
• function hdsp_check_for_firmware
• function hdsp_fifo_wait
• function hdsp_read_gain
• function hdsp_write_gain
• function snd_hdsp_use_is_exclusive
• function hdsp_spdif_sample_rate
• function hdsp_external_sample_rate
• function hdsp_compute_period_size
• function hdsp_hw_pointer
• function hdsp_reset_hw_pointer
• function hdsp_start_audio
• function hdsp_stop_audio
• function hdsp_silence_playback
• function hdsp_set_interrupt_interval
• function hdsp_set_dds_value
• function hdsp_set_rate
• function it
• function snd_hdsp_midi_read_byte
• function snd_hdsp_midi_write_byte
• function snd_hdsp_midi_input_available
• function snd_hdsp_midi_output_possible
• function snd_hdsp_flush_midi_input
• function snd_hdsp_midi_output_write
• function snd_hdsp_midi_input_read
• function scoped_guard
• function snd_hdsp_midi_input_trigger
• function snd_hdsp_midi_output_timer
• function snd_hdsp_midi_output_trigger
• function snd_hdsp_midi_input_open
• function snd_hdsp_midi_output_open
• function snd_hdsp_midi_input_close
• function snd_hdsp_midi_output_close
• function snd_hdsp_create_midi
• function snd_hdsp_convert_from_aes
• function snd_hdsp_convert_to_aes
• function snd_hdsp_control_spdif_info

Annotated Snippet

static struct pci_driver hdsp_driver = {
	.name =     KBUILD_MODNAME,
	.id_table = snd_hdsp_ids,
	.probe =    snd_hdsp_probe,
};

module_pci_driver(hdsp_driver);

Annotation

• Immediate include surface: `linux/init.h`, `linux/delay.h`, `linux/interrupt.h`, `linux/pci.h`, `linux/firmware.h`, `linux/module.h`, `linux/math64.h`, `linux/vmalloc.h`.
• Detected declarations: `struct hdsp_9632_meters`, `struct hdsp_midi`, `struct hdsp`, `function snd_hammerfall_get_buffer`, `function hdsp_playback_to_output_key`, `function hdsp_input_to_output_key`, `function hdsp_write`, `function hdsp_read`, `function hdsp_check_for_iobox`, `function hdsp_wait_for_iobox`.
• Atlas domain: Driver Families / sound/pci.
• Implementation status: pattern implementation candidate.
• This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.
• 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.