drivers/tty/serial/ucc_uart.c

File Facts

System

Linux kernel

Corpus path

drivers/tty/serial/ucc_uart.c

Extension

.c

Size

41837 bytes

Lines

1532

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/platform_device.h
• linux/serial.h
• linux/serial_core.h
• linux/slab.h
• linux/tty.h
• linux/tty_flip.h
• linux/io.h
• linux/of.h
• linux/of_address.h
• linux/of_irq.h
• linux/dma-mapping.h
• soc/fsl/qe/ucc_slow.h
• linux/firmware.h
• soc/fsl/cpm.h
• asm/reg.h

Detected Declarations

• struct ucc_uart_pram
• struct uart_qe_port
• function physical
• function physical
• function ready
• function lines
• function qe_uart_stop_tx
• function qe_uart_tx_pump
• function qe_uart_start_tx
• function qe_uart_stop_rx
• function qe_uart_break_ctl
• function qe_uart_int_rx
• function qe_uart_int
• function qe_uart_initbd
• function qe_uart_request_port
• function qe_uart_startup
• function qe_uart_shutdown
• function qe_uart_set_termios
• function qe_uart_request_port
• function qe_uart_config_port
• function qe_uart_request_port
• function qe_uart_verify_port
• function soc_info
• function requst_firmware_nowait
• function soft_uart_init
• function soft_uart_init
• function ucc_uart_probe
• function ucc_uart_remove
• function ucc_uart_init
• function ucc_uart_exit
• module init ucc_uart_init

Annotated Snippet

module_init(ucc_uart_init);
module_exit(ucc_uart_exit);

MODULE_DESCRIPTION("Freescale QUICC Engine (QE) UART");
MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS_CHARDEV_MAJOR(SERIAL_QE_MAJOR);

Annotation

• Immediate include surface: `linux/module.h`, `linux/platform_device.h`, `linux/serial.h`, `linux/serial_core.h`, `linux/slab.h`, `linux/tty.h`, `linux/tty_flip.h`, `linux/io.h`.
• Detected declarations: `struct ucc_uart_pram`, `struct uart_qe_port`, `function physical`, `function physical`, `function ready`, `function lines`, `function qe_uart_stop_tx`, `function qe_uart_tx_pump`, `function qe_uart_start_tx`, `function qe_uart_stop_rx`.
• 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.