drivers/tty/serial/atmel_serial.c

File Facts

System

Linux kernel

Corpus path

drivers/tty/serial/atmel_serial.c

Extension

.c

Size

82083 bytes

Lines

3027

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/circ_buf.h
• linux/tty.h
• linux/ioport.h
• linux/slab.h
• linux/init.h
• linux/serial.h
• linux/clk.h
• linux/clk-provider.h
• linux/console.h
• linux/sysrq.h
• linux/tty_flip.h
• linux/platform_device.h
• linux/of.h
• linux/dma-mapping.h
• linux/dmaengine.h
• linux/atmel_pdc.h
• linux/uaccess.h
• linux/platform_data/atmel.h
• linux/timer.h
• linux/err.h
• linux/irq.h
• linux/suspend.h
• linux/mm.h
• linux/io.h
• asm/div64.h
• asm/ioctls.h
• linux/serial_core.h
• serial_mctrl_gpio.h
• atmel_serial.h

Detected Declarations

• struct atmel_dma_buffer
• struct atmel_uart_char
• struct atmel_uart_port
• function to_atmel_uart_port
• function atmel_uart_readl
• function atmel_uart_writel
• function atmel_uart_read_char
• function atmel_uart_write_char
• function atmel_uart_is_half_duplex
• function atmel_error_rate
• function atmel_use_pdc_rx
• function atmel_use_pdc_tx
• function atmel_use_pdc_rx
• function atmel_use_pdc_tx
• function atmel_use_dma_tx
• function atmel_use_dma_rx
• function atmel_use_fifo
• function atmel_tasklet_schedule
• function atmel_config_rs485
• function atmel_calc_cd
• function atmel_calc_fidi
• function atmel_config_iso7816
• function atmel_tx_empty
• function atmel_set_mctrl
• function atmel_get_mctrl
• function atmel_stop_tx
• function atmel_start_tx
• function atmel_start_rx
• function atmel_stop_rx
• function atmel_enable_ms
• function atmel_disable_ms
• function atmel_break_ctl
• function atmel_buffer_rx_char
• function atmel_pdc_rxerr
• function received
• function characters
• function atmel_complete_tx_dma
• function atmel_release_tx_dma
• function atmel_tx_dma
• function atmel_prepare_tx_dma
• function atmel_complete_rx_dma
• function atmel_release_rx_dma
• function atmel_rx_from_dma
• function atmel_prepare_rx_dma
• function atmel_uart_timer_callback
• function atmel_handle_receive
• function atmel_handle_transmit
• function atmel_handle_status

Annotated Snippet

device_initcall(atmel_serial_init);

Annotation

• Immediate include surface: `linux/circ_buf.h`, `linux/tty.h`, `linux/ioport.h`, `linux/slab.h`, `linux/init.h`, `linux/serial.h`, `linux/clk.h`, `linux/clk-provider.h`.
• Detected declarations: `struct atmel_dma_buffer`, `struct atmel_uart_char`, `struct atmel_uart_port`, `function to_atmel_uart_port`, `function atmel_uart_readl`, `function atmel_uart_writel`, `function atmel_uart_read_char`, `function atmel_uart_write_char`, `function atmel_uart_is_half_duplex`, `function atmel_error_rate`.
• 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.