drivers/net/wireless/broadcom/b43legacy/rfkill.c

File Facts

System

Linux kernel

Corpus path

drivers/net/wireless/broadcom/b43legacy/rfkill.c

Extension

.c

Size

1992 bytes

Lines

79

Domain

Driver Families

Bucket

drivers/net

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.
• 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

• radio.h
• b43legacy.h

Detected Declarations

• function Copyright
• function b43legacy_rfkill_poll

Annotated Snippet

if (ssb_bus_powerup(bus, 0)) {
			mutex_unlock(&wl->mutex);
			return;
		}
		ssb_device_enable(dev->dev, 0);
		brought_up = true;
	}

	enabled = b43legacy_is_hw_radio_enabled(dev);

	if (unlikely(enabled != dev->radio_hw_enable)) {
		dev->radio_hw_enable = enabled;
		b43legacyinfo(wl, "Radio hardware status changed to %s\n",
			enabled ? "ENABLED" : "DISABLED");
		wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);
		if (enabled != dev->phy.radio_on) {
			if (enabled)
				b43legacy_radio_turn_on(dev);
			else
				b43legacy_radio_turn_off(dev, 0);
		}
	}

	if (brought_up) {
		ssb_device_disable(dev->dev, 0);
		ssb_bus_may_powerdown(bus);
	}

	mutex_unlock(&wl->mutex);
}

Annotation

• Immediate include surface: `radio.h`, `b43legacy.h`.
• Detected declarations: `function Copyright`, `function b43legacy_rfkill_poll`.
• Atlas domain: Driver Families / drivers/net.
• Implementation status: source 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.