drivers/comedi/drivers/ni_660x.c

File Facts

System

Linux kernel

Corpus path

drivers/comedi/drivers/ni_660x.c

Extension

.c

Size

36845 bytes

Lines

1255

Domain

Driver Families

Bucket

drivers/comedi

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/module.h
• linux/interrupt.h
• linux/comedi/comedi_pci.h
• mite.h
• ni_tio.h
• ni_routes.h

Detected Declarations

• struct ni_660x_register_data
• struct ni_660x_board
• struct ni_660x_private
• enum ni_660x_register
• enum ni_660x_boardid
• function ni_660x_write
• function ni_660x_read
• function ni_660x_gpct_write
• function ni_660x_gpct_read
• function ni_660x_set_dma_channel
• function ni_660x_unset_dma_channel
• function ni_660x_request_mite_channel
• function ni_660x_release_mite_channel
• function ni_660x_cmd
• function ni_660x_cancel
• function set_tio_counterswap
• function ni_660x_handle_gpct_interrupt
• function ni_660x_interrupt
• function ni_660x_input_poll
• function ni_660x_buf_change
• function ni_660x_allocate_private
• function ni_660x_alloc_mite_rings
• function ni_660x_free_mite_rings
• function ni_660x_dio_insn_bits
• function ni_660x_select_pfi_output
• function ni_660x_set_pfi_direction
• function ni_660x_get_pfi_direction
• function ni_660x_set_pfi_routing
• function ni_660x_get_pfi_routing
• function ni_660x_set_pfi_filter
• function ni_660x_dio_insn_config
• function _ni_get_valid_routes
• function get_output_select_source
• function determined
• function test_route
• function connect_route
• function determined
• function disconnect_route
• function determined
• function ni_global_insn_config
• function ni_660x_init_tio_chips
• function ni_660x_auto_attach
• function ni_660x_detach
• function ni_660x_pci_probe

Annotated Snippet

static struct pci_driver ni_660x_pci_driver = {
	.name		= "ni_660x",
	.id_table	= ni_660x_pci_table,
	.probe		= ni_660x_pci_probe,
	.remove		= comedi_pci_auto_unconfig,
};
module_comedi_pci_driver(ni_660x_driver, ni_660x_pci_driver);

MODULE_AUTHOR("Comedi https://www.comedi.org");
MODULE_DESCRIPTION("Comedi driver for NI 660x counter/timer boards");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/interrupt.h`, `linux/comedi/comedi_pci.h`, `mite.h`, `ni_tio.h`, `ni_routes.h`.
• Detected declarations: `struct ni_660x_register_data`, `struct ni_660x_board`, `struct ni_660x_private`, `enum ni_660x_register`, `enum ni_660x_boardid`, `function ni_660x_write`, `function ni_660x_read`, `function ni_660x_gpct_write`, `function ni_660x_gpct_read`, `function ni_660x_set_dma_channel`.
• Atlas domain: Driver Families / drivers/comedi.
• 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.