drivers/tty/serial/mux.c

File Facts

System

Linux kernel

Corpus path

drivers/tty/serial/mux.c

Extension

.c

Size

14288 bytes

Lines

584

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.
• 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/module.h
• linux/ioport.h
• linux/init.h
• linux/serial.h
• linux/tty.h
• linux/tty_flip.h
• linux/console.h
• linux/delay.h
• linux/device.h
• linux/io.h
• asm/irq.h
• asm/parisc-device.h
• linux/sysrq.h
• linux/serial_core.h

Detected Declarations

• struct mux_port
• function get_mux_port_count
• function mux_tx_empty
• function mux_set_mctrl
• function mux_stop_tx
• function mux_write
• function mux_read
• function mux_startup
• function mux_shutdown
• function mux_set_termios
• function mux_release_port
• function mux_config_port
• function mux_verify_port
• function mux_poll
• function mux_console_write
• function mux_console_setup
• function chip
• function mux_remove
• function mux_init
• function mux_exit
• module init mux_init

Annotated Snippet

module_init(mux_init);
module_exit(mux_exit);

MODULE_AUTHOR("Ryan Bradetich");
MODULE_DESCRIPTION("Serial MUX driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS_CHARDEV_MAJOR(MUX_MAJOR);

Annotation

• Immediate include surface: `linux/module.h`, `linux/ioport.h`, `linux/init.h`, `linux/serial.h`, `linux/tty.h`, `linux/tty_flip.h`, `linux/console.h`, `linux/delay.h`.
• Detected declarations: `struct mux_port`, `function get_mux_port_count`, `function mux_tx_empty`, `function mux_set_mctrl`, `function mux_stop_tx`, `function mux_write`, `function mux_read`, `function mux_startup`, `function mux_shutdown`, `function mux_set_termios`.
• Atlas domain: Driver Families / drivers/tty.
• 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.