drivers/tty/serial/cpm_uart.c

File Facts

System

Linux kernel

Corpus path

drivers/tty/serial/cpm_uart.c

Extension

.c

Size

39423 bytes

Lines

1605

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/tty.h
• linux/tty_flip.h
• linux/ioport.h
• linux/init.h
• linux/serial.h
• linux/console.h
• linux/sysrq.h
• linux/device.h
• linux/memblock.h
• linux/dma-mapping.h
• linux/of_address.h
• linux/of_irq.h
• linux/of_platform.h
• linux/gpio/consumer.h
• linux/clk.h
• sysdev/fsl_soc.h
• asm/io.h
• asm/irq.h
• asm/delay.h
• asm/udbg.h
• linux/serial_core.h
• linux/kernel.h
• cpm_uart.h

Detected Declarations

• function cpm_line_cr_cmd
• function cpm_uart_tx_empty
• function cpm_uart_set_mctrl
• function cpm_uart_get_mctrl
• function cpm_uart_stop_tx
• function cpm_uart_start_tx
• function cpm_uart_stop_rx
• function cpm_uart_break_ctl
• function cpm_uart_int_tx
• function cpm_uart_int_rx
• function cpm_uart_int
• function cpm_uart_startup
• function cpm_uart_wait_until_send
• function cpm_uart_shutdown
• function cpm_uart_set_termios
• function serial_struct
• function cpm_uart_tx_pump
• function cpm_uart_initbd
• function cpm_uart_init_scc
• function cpm_uart_init_smc
• function cpm_uart_allocbuf
• function cpm_uart_freebuf
• function cpm_uart_request_port
• function cpm_uart_release_port
• function cpm_uart_config_port
• function cpm_uart_early_write
• function poll_wait_key
• function cpm_get_poll_char
• function cpm_put_poll_char
• function udbg_cpm_putc
• function udbg_cpm_getc_poll
• function udbg_cpm_getc
• function cpm_uart_unmap_pram
• function cpm_uart_init_port
• function of_device_is_compatible
• function cpm_uart_console_write
• function cpm_uart_console_setup
• function for_each_node_by_type
• function cpm_uart_console_init
• function cpm_uart_probe
• function cpm_uart_remove
• function cpm_uart_init
• function cpm_uart_exit
• module init cpm_uart_init

Annotated Snippet

module_init(cpm_uart_init);
module_exit(cpm_uart_exit);

MODULE_AUTHOR("Kumar Gala/Antoniou Pantelis");
MODULE_DESCRIPTION("CPM SCC/SMC port driver $Revision: 0.01 $");
MODULE_LICENSE("GPL");
MODULE_ALIAS_CHARDEV(SERIAL_CPM_MAJOR, SERIAL_CPM_MINOR);

Annotation

• Immediate include surface: `linux/module.h`, `linux/tty.h`, `linux/tty_flip.h`, `linux/ioport.h`, `linux/init.h`, `linux/serial.h`, `linux/console.h`, `linux/sysrq.h`.
• Detected declarations: `function cpm_line_cr_cmd`, `function cpm_uart_tx_empty`, `function cpm_uart_set_mctrl`, `function cpm_uart_get_mctrl`, `function cpm_uart_stop_tx`, `function cpm_uart_start_tx`, `function cpm_uart_stop_rx`, `function cpm_uart_break_ctl`, `function cpm_uart_int_tx`, `function cpm_uart_int_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.