drivers/comedi/drivers/dt282x.c

File Facts

System

Linux kernel

Corpus path

drivers/comedi/drivers/dt282x.c

Extension

.c

Size

30212 bytes

Lines

1176

Domain

Driver Families

Bucket

drivers/comedi

Inferred role

Driver Families: implementation source

Status

source 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.
• 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/module.h
• linux/delay.h
• linux/gfp.h
• linux/interrupt.h
• linux/io.h
• linux/comedi/comedidev.h
• linux/comedi/comedi_isadma.h

Detected Declarations

• struct dt282x_board
• struct dt282x_private
• function dt282x_prep_ai_dma
• function dt282x_prep_ao_dma
• function dt282x_disable_dma
• function dt282x_ns_to_timer
• function dt282x_munge
• function dt282x_ao_setup_dma
• function dt282x_ao_dma_interrupt
• function dt282x_ai_dma_interrupt
• function dt282x_interrupt
• function dt282x_load_changain
• function dt282x_ai_timeout
• function dt282x_ai_insn_read
• function dt282x_ai_cmdtest
• function dt282x_ai_cmd
• function dt282x_ai_cancel
• function dt282x_ao_insn_write
• function dt282x_ao_cmdtest
• function dt282x_ao_inttrig
• function dt282x_ao_cmd
• function dt282x_ao_cancel
• function dt282x_dio_insn_bits
• function dt282x_dio_insn_config
• function dt282x_alloc_dma
• function dt282x_free_dma
• function dt282x_initialize
• function dt282x_attach
• function dt282x_detach

Annotated Snippet

struct dt282x_board {
	const char *name;
	unsigned int ai_maxdata;
	int adchan_se;
	int adchan_di;
	int ai_speed;
	int ispgl;
	int dachan;
	unsigned int ao_maxdata;
};

static const struct dt282x_board boardtypes[] = {
	{
		.name		= "dt2821",
		.ai_maxdata	= 0x0fff,
		.adchan_se	= 16,
		.adchan_di	= 8,
		.ai_speed	= 20000,
		.dachan		= 2,
		.ao_maxdata	= 0x0fff,
	}, {
		.name		= "dt2821-f",
		.ai_maxdata	= 0x0fff,
		.adchan_se	= 16,
		.adchan_di	= 8,
		.ai_speed	= 6500,
		.dachan		= 2,
		.ao_maxdata	= 0x0fff,
	}, {
		.name		= "dt2821-g",
		.ai_maxdata	= 0x0fff,
		.adchan_se	= 16,
		.adchan_di	= 8,
		.ai_speed	= 4000,
		.dachan		= 2,
		.ao_maxdata	= 0x0fff,
	}, {
		.name		= "dt2823",
		.ai_maxdata	= 0xffff,
		.adchan_di	= 4,
		.ai_speed	= 10000,
		.dachan		= 2,
		.ao_maxdata	= 0xffff,
	}, {
		.name		= "dt2824-pgh",
		.ai_maxdata	= 0x0fff,
		.adchan_se	= 16,
		.adchan_di	= 8,
		.ai_speed	= 20000,
	}, {
		.name		= "dt2824-pgl",
		.ai_maxdata	= 0x0fff,
		.adchan_se	= 16,
		.adchan_di	= 8,
		.ai_speed	= 20000,
		.ispgl		= 1,
	}, {
		.name		= "dt2825",
		.ai_maxdata	= 0x0fff,
		.adchan_se	= 16,
		.adchan_di	= 8,
		.ai_speed	= 20000,
		.ispgl		= 1,
		.dachan		= 2,
		.ao_maxdata	= 0x0fff,
	}, {
		.name		= "dt2827",
		.ai_maxdata	= 0xffff,
		.adchan_di	= 4,
		.ai_speed	= 10000,
		.dachan		= 2,
		.ao_maxdata	= 0x0fff,
	}, {
		.name		= "dt2828",
		.ai_maxdata	= 0x0fff,
		.adchan_se	= 4,
		.ai_speed	= 10000,
		.dachan		= 2,
		.ao_maxdata	= 0x0fff,
	}, {
		.name		= "dt2829",
		.ai_maxdata	= 0xffff,
		.adchan_se	= 8,
		.ai_speed	= 33250,
		.dachan		= 2,
		.ao_maxdata	= 0xffff,
	}, {
		.name		= "dt21-ez",
		.ai_maxdata	= 0x0fff,
		.adchan_se	= 16,

Annotation

• Immediate include surface: `linux/module.h`, `linux/delay.h`, `linux/gfp.h`, `linux/interrupt.h`, `linux/io.h`, `linux/comedi/comedidev.h`, `linux/comedi/comedi_isadma.h`.
• Detected declarations: `struct dt282x_board`, `struct dt282x_private`, `function dt282x_prep_ai_dma`, `function dt282x_prep_ao_dma`, `function dt282x_disable_dma`, `function dt282x_ns_to_timer`, `function dt282x_munge`, `function dt282x_ao_setup_dma`, `function dt282x_ao_dma_interrupt`, `function dt282x_ai_dma_interrupt`.
• Atlas domain: Driver Families / drivers/comedi.
• Implementation status: source implementation candidate.
• 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.