drivers/tty/serial/amba-pl010.c

File Facts

System

Linux kernel

Corpus path

drivers/tty/serial/amba-pl010.c

Extension

.c

Size

18636 bytes

Lines

805

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/ioport.h
• linux/init.h
• linux/console.h
• linux/sysrq.h
• linux/device.h
• linux/tty.h
• linux/tty_flip.h
• linux/serial_core.h
• linux/serial.h
• linux/amba/bus.h
• linux/amba/serial.h
• linux/clk.h
• linux/slab.h
• linux/io.h

Detected Declarations

• struct uart_amba_port
• function pl010_stop_tx
• function pl010_start_tx
• function pl010_stop_rx
• function pl010_disable_ms
• function pl010_enable_ms
• function pl010_rx_chars
• function pl010_tx_chars
• function pl010_modem_status
• function pl010_int
• function pl010_tx_empty
• function pl010_get_mctrl
• function pl010_set_mctrl
• function pl010_break_ctl
• function pl010_startup
• function pl010_shutdown
• function pl010_set_termios
• function pl010_set_ldisc
• function region
• function region
• function pl010_config_port
• function serial_struct
• function pl010_console_putchar
• function pl010_console_write
• function pl010_console_get_options
• function pl010_console_setup
• function pl010_probe
• function pl010_remove
• function pl010_suspend
• function pl010_resume
• function pl010_init
• function pl010_exit
• module init pl010_init

Annotated Snippet

module_init(pl010_init);
module_exit(pl010_exit);

MODULE_AUTHOR("ARM Ltd/Deep Blue Solutions Ltd");
MODULE_DESCRIPTION("ARM AMBA serial port driver");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/ioport.h`, `linux/init.h`, `linux/console.h`, `linux/sysrq.h`, `linux/device.h`, `linux/tty.h`, `linux/tty_flip.h`.
• Detected declarations: `struct uart_amba_port`, `function pl010_stop_tx`, `function pl010_start_tx`, `function pl010_stop_rx`, `function pl010_disable_ms`, `function pl010_enable_ms`, `function pl010_rx_chars`, `function pl010_tx_chars`, `function pl010_modem_status`, `function pl010_int`.
• 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.