drivers/macintosh/adb.c

File Facts

System

Linux kernel

Corpus path

drivers/macintosh/adb.c

Extension

.c

Size

20307 bytes

Lines

899

Domain

Driver Families

Bucket

drivers/macintosh

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.
• 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/types.h
• linux/errno.h
• linux/kernel.h
• linux/slab.h
• linux/module.h
• linux/fs.h
• linux/mm.h
• linux/sched/signal.h
• linux/adb.h
• linux/cuda.h
• linux/pmu.h
• linux/notifier.h
• linux/wait.h
• linux/init.h
• linux/delay.h
• linux/spinlock.h
• linux/completion.h
• linux/device.h
• linux/kthread.h
• linux/platform_device.h
• linux/mutex.h
• linux/of.h
• linux/uaccess.h
• asm/machdep.h

Detected Declarations

• struct adbdev_state
• function printADBreply
• function adb_scan_bus
• function adb_probe_task
• function __adb_probe_task
• function adb_reset_bus
• function __adb_suspend
• function adb_suspend
• function adb_freeze
• function adb_poweroff
• function __adb_resume
• function adb_resume
• function adb_init
• function do_adb_reset_bus
• function adb_poll
• function adb_sync_req_done
• function adb_request
• function adb_register
• function adb_unregister
• function adb_input
• function try_handler_change
• function adb_try_handler_change
• function adb_get_infos
• function adb_write_done
• function do_adb_query
• function adb_open
• function adb_release
• function adb_read
• function adb_write
• function adb_dummy_probe
• function adbdev_init
• module init adb_init
• export adb_client_list
• export adb_poll
• export adb_request
• export adb_register
• export adb_unregister
• export adb_try_handler_change

Annotated Snippet

static const struct file_operations adb_fops = {
	.owner		= THIS_MODULE,
	.read		= adb_read,
	.write		= adb_write,
	.open		= adb_open,
	.release	= adb_release,
};

#ifdef CONFIG_PM
static const struct dev_pm_ops adb_dev_pm_ops = {
	.suspend = adb_suspend,
	.resume = adb_resume,
	/* Hibernate hooks */
	.freeze = adb_freeze,
	.thaw = adb_resume,
	.poweroff = adb_poweroff,
	.restore = adb_resume,
};
#endif

static struct platform_driver adb_pfdrv = {
	.driver = {
		.name = "adb",
#ifdef CONFIG_PM
		.pm = &adb_dev_pm_ops,
#endif
	},
};

static struct platform_device adb_pfdev = {
	.name = "adb",
};

static int __init
adb_dummy_probe(struct platform_device *dev)
{
	if (dev == &adb_pfdev)
		return 0;
	return -ENODEV;
}

static void __init
adbdev_init(void)
{
	if (register_chrdev(ADB_MAJOR, "adb", &adb_fops)) {
		pr_err("adb: unable to get major %d\n", ADB_MAJOR);
		return;
	}

	if (class_register(&adb_dev_class))
		return;

	device_create(&adb_dev_class, NULL, MKDEV(ADB_MAJOR, 0), NULL, "adb");

	platform_device_register(&adb_pfdev);
	platform_driver_probe(&adb_pfdrv, adb_dummy_probe);
}

Annotation

• Immediate include surface: `linux/types.h`, `linux/errno.h`, `linux/kernel.h`, `linux/slab.h`, `linux/module.h`, `linux/fs.h`, `linux/mm.h`, `linux/sched/signal.h`.
• Detected declarations: `struct adbdev_state`, `function printADBreply`, `function adb_scan_bus`, `function adb_probe_task`, `function __adb_probe_task`, `function adb_reset_bus`, `function __adb_suspend`, `function adb_suspend`, `function adb_freeze`, `function adb_poweroff`.
• Atlas domain: Driver Families / drivers/macintosh.
• 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.

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.