drivers/tty/serial/sunsab.c

File Facts

System

Linux kernel

Corpus path

drivers/tty/serial/sunsab.c

Extension

.c

Size

30074 bytes

Lines

1160

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.
• 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/module.h
• linux/kernel.h
• linux/errno.h
• linux/tty.h
• linux/tty_flip.h
• linux/major.h
• linux/string.h
• linux/ptrace.h
• linux/ioport.h
• linux/circ_buf.h
• linux/serial.h
• linux/sysrq.h
• linux/console.h
• linux/spinlock.h
• linux/slab.h
• linux/delay.h
• linux/init.h
• linux/of.h
• linux/platform_device.h
• linux/io.h
• asm/irq.h
• asm/prom.h
• asm/setup.h
• linux/serial_core.h
• linux/sunserialcore.h
• sunsab.h

Detected Declarations

• struct uart_sunsab_port
• function sunsab_tec_wait
• function sunsab_cec_wait
• function receive_chars
• function transmit_chars
• function check_status
• function sunsab_interrupt
• function sunsab_tx_empty
• function sunsab_set_mctrl
• function sunsab_get_mctrl
• function sunsab_stop_tx
• function sunsab_tx_idle
• function sunsab_start_tx
• function sunsab_send_xchar
• function sunsab_stop_rx
• function sunsab_break_ctl
• function sunsab_startup
• function sunsab_shutdown
• function calc_ebrg
• function sunsab_convert_to_sab
• function sunsab_set_termios
• function sunsab_release_port
• function sunsab_config_port
• function sunsab_console_putchar
• function sunsab_console_write
• function sunsab_console_setup
• function sunsab_init_one
• function sab_probe
• function sab_remove
• function sunsab_init
• function sunsab_exit
• module init sunsab_init

Annotated Snippet

module_init(sunsab_init);
module_exit(sunsab_exit);

MODULE_AUTHOR("Eddie C. Dost and David S. Miller");
MODULE_DESCRIPTION("Sun SAB82532 serial port driver");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/kernel.h`, `linux/errno.h`, `linux/tty.h`, `linux/tty_flip.h`, `linux/major.h`, `linux/string.h`, `linux/ptrace.h`.
• Detected declarations: `struct uart_sunsab_port`, `function sunsab_tec_wait`, `function sunsab_cec_wait`, `function receive_chars`, `function transmit_chars`, `function check_status`, `function sunsab_interrupt`, `function sunsab_tx_empty`, `function sunsab_set_mctrl`, `function sunsab_get_mctrl`.
• 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.