drivers/tty/serial/21285.c

File Facts

System

Linux kernel

Corpus path

drivers/tty/serial/21285.c

Extension

.c

Size

11927 bytes

Lines

519

Domain

Driver Families

Bucket

drivers/tty

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.
• 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/tty.h
• linux/ioport.h
• linux/init.h
• linux/console.h
• linux/device.h
• linux/tty_flip.h
• linux/serial_core.h
• linux/serial.h
• linux/io.h
• asm/irq.h
• asm/mach-types.h
• asm/system_info.h
• asm/hardware/dec21285.h
• mach/hardware.h

Detected Declarations

• function is_enabled
• function enable
• function disable
• function int
• function serial21285_start_tx
• function serial21285_stop_rx
• function serial21285_rx_chars
• function serial21285_tx_chars
• function serial21285_tx_empty
• function serial21285_get_mctrl
• function serial21285_set_mctrl
• function serial21285_startup
• function serial21285_shutdown
• function serial21285_set_termios
• function serial21285_release_port
• function serial21285_request_port
• function serial21285_config_port
• function serial_struct
• function serial21285_setup_ports
• function serial21285_console_putchar
• function serial21285_console_write
• function serial21285_get_options
• function serial21285_console_setup
• function rs285_console_init
• function serial21285_init
• function serial21285_exit
• module init serial21285_init

Annotated Snippet

module_init(serial21285_init);
module_exit(serial21285_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Intel Footbridge (21285) serial driver");
MODULE_ALIAS_CHARDEV(SERIAL_21285_MAJOR, SERIAL_21285_MINOR);

Annotation

• Immediate include surface: `linux/module.h`, `linux/tty.h`, `linux/ioport.h`, `linux/init.h`, `linux/console.h`, `linux/device.h`, `linux/tty_flip.h`, `linux/serial_core.h`.
• Detected declarations: `function is_enabled`, `function enable`, `function disable`, `function int`, `function serial21285_start_tx`, `function serial21285_stop_rx`, `function serial21285_rx_chars`, `function serial21285_tx_chars`, `function serial21285_tx_empty`, `function serial21285_get_mctrl`.
• Atlas domain: Driver Families / drivers/tty.
• Implementation status: integration 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.