drivers/pnp/isapnp/core.c

File Facts

System

Linux kernel

Corpus path

drivers/pnp/isapnp/core.c

Extension

.c

Size

24919 bytes

Lines

1072

Domain

Driver Families

Bucket

drivers/pnp

Inferred role

Driver Families: exported/initcall integration point

Status

integration 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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/moduleparam.h
• linux/kernel.h
• linux/errno.h
• linux/delay.h
• linux/init.h
• linux/isapnp.h
• linux/mutex.h
• linux/string_choices.h
• asm/io.h
• ../base.h

Detected Declarations

• function write_data
• function write_address
• function read_data
• function isapnp_read_byte
• function isapnp_read_word
• function isapnp_write_byte
• function isapnp_write_word
• function isapnp_key
• function isapnp_wait
• function isapnp_wake
• function isapnp_device
• function isapnp_activate
• function isapnp_deactivate
• function isapnp_peek
• function isapnp_next_rdp
• function isapnp_set_rdp
• function isapnp_isolate_rdp_select
• function Isolate
• function isapnp_read_tag
• function isapnp_skip_bytes
• function isapnp_parse_device
• function isapnp_parse_irq_resource
• function isapnp_parse_dma_resource
• function isapnp_parse_port_resource
• function isapnp_parse_fixed_port_resource
• function isapnp_parse_mem_resource
• function isapnp_parse_mem32_resource
• function isapnp_parse_fixed_mem32_resource
• function isapnp_parse_name
• function isapnp_create_device
• function isapnp_parse_resource_map
• function isapnp_build_device_list
• function isapnp_present
• function pnp_for_each_card
• function isapnp_cfg_begin
• function isapnp_cfg_end
• function isapnp_get_resources
• function isapnp_set_resources
• function isapnp_disable_resources
• function isapnp_init
• function protocol_for_each_card
• function card_for_each_dev
• function isapnp_setup_disable
• function isapnp_setup_isapnp
• module init isapnp_init
• export isapnp_protocol
• export isapnp_present
• export isapnp_cfg_begin

Annotated Snippet

device_initcall(isapnp_init);

/* format is: noisapnp */

static int __init isapnp_setup_disable(char *str)
{
	isapnp_disable = 1;
	return 1;
}

__setup("noisapnp", isapnp_setup_disable);

/* format is: isapnp=rdp,reset,skip_pci_scan,verbose */

static int __init isapnp_setup_isapnp(char *str)
{
	(void)((get_option(&str, &isapnp_rdp) == 2) &&
	       (get_option(&str, &isapnp_reset) == 2) &&
	       (get_option(&str, &isapnp_verbose) == 2));
	return 1;
}

__setup("isapnp=", isapnp_setup_isapnp);

Annotation

• Immediate include surface: `linux/moduleparam.h`, `linux/kernel.h`, `linux/errno.h`, `linux/delay.h`, `linux/init.h`, `linux/isapnp.h`, `linux/mutex.h`, `linux/string_choices.h`.
• Detected declarations: `function write_data`, `function write_address`, `function read_data`, `function isapnp_read_byte`, `function isapnp_read_word`, `function isapnp_write_byte`, `function isapnp_write_word`, `function isapnp_key`, `function isapnp_wait`, `function isapnp_wake`.
• Atlas domain: Driver Families / drivers/pnp.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.