drivers/tty/serial/dz.c

File Facts

System

Linux kernel

Corpus path

drivers/tty/serial/dz.c

Extension

.c

Size

23450 bytes

Lines

952

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.
• 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/bitops.h
• linux/compiler.h
• linux/console.h
• linux/delay.h
• linux/errno.h
• linux/init.h
• linux/interrupt.h
• linux/ioport.h
• linux/kernel.h
• linux/major.h
• linux/module.h
• linux/platform_device.h
• linux/serial.h
• linux/serial_core.h
• linux/sysrq.h
• linux/tty.h
• linux/tty_flip.h
• linux/atomic.h
• linux/io.h
• dz.h

Detected Declarations

• struct dz_port
• struct dz_mux
• function dz_in
• function dz_out
• function rs_stop
• function dz_start_tx
• function dz_stop_rx
• function dz_interrupt
• function transmit_char
• function check_modem_status
• function dz_interrupt
• function dz_get_mctrl
• function dz_set_mctrl
• function startup
• function dz_shutdown
• function dz_tx_empty
• function dz_break_ctl
• function dz_encode_baud_rate
• function dz_reset
• function dz_set_termios
• function dz_release_port
• function dz_map_port
• function dz_request_port
• function dz_config_port
• function serial_struct
• function dz_probe
• function dz_remove
• function dz_console_putchar
• function dz_console_print
• function dz_console_setup
• function dz_init
• function dz_exit
• module init dz_init

Annotated Snippet

module_init(dz_init);
module_exit(dz_exit);

Annotation

• Immediate include surface: `linux/bitops.h`, `linux/compiler.h`, `linux/console.h`, `linux/delay.h`, `linux/errno.h`, `linux/init.h`, `linux/interrupt.h`, `linux/ioport.h`.
• Detected declarations: `struct dz_port`, `struct dz_mux`, `function dz_in`, `function dz_out`, `function rs_stop`, `function dz_start_tx`, `function dz_stop_rx`, `function dz_interrupt`, `function transmit_char`, `function check_modem_status`.
• 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.
• 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.