drivers/usb/host/ohci-at91.c

File Facts

System

Linux kernel

Corpus path

drivers/usb/host/ohci-at91.c

Extension

.c

Size

18319 bytes

Lines

729

Domain

Driver Families

Bucket

drivers/usb

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.
• 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/arm-smccc.h
• linux/clk.h
• linux/dma-mapping.h
• linux/gpio/consumer.h
• linux/platform_device.h
• linux/platform_data/atmel.h
• linux/io.h
• linux/kernel.h
• linux/module.h
• linux/mfd/syscon.h
• linux/of.h
• linux/regmap.h
• linux/usb.h
• linux/usb/hcd.h
• soc/at91/atmel-sfr.h
• ohci.h

Detected Declarations

• struct at91_usbh_data
• struct ohci_at91_priv
• function at91_start_clock
• function at91_stop_clock
• function at91_start_hc
• function at91_stop_hc
• function at91_dt_suspend_smc
• function start
• function usb_hcd_at91_probe
• function ohci_at91_usb_set_power
• function ohci_at91_usb_get_power
• function ohci_at91_hub_status_data
• function at91_for_each_port
• function ohci_at91_port_suspend
• function ohci_at91_hub_control
• function ohci_hcd_at91_overcurrent_irq
• function ohci_hcd_at91_drv_probe
• function at91_for_each_port
• function at91_for_each_port
• function ohci_hcd_at91_drv_remove
• function ohci_hcd_at91_drv_suspend
• function ohci_hcd_at91_drv_resume
• function ohci_at91_init
• function ohci_at91_cleanup
• module init ohci_at91_init

Annotated Snippet

module_init(ohci_at91_init);

static void __exit ohci_at91_cleanup(void)
{
	platform_driver_unregister(&ohci_hcd_at91_driver);
}
module_exit(ohci_at91_cleanup);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:at91_ohci");

Annotation

• Immediate include surface: `linux/arm-smccc.h`, `linux/clk.h`, `linux/dma-mapping.h`, `linux/gpio/consumer.h`, `linux/platform_device.h`, `linux/platform_data/atmel.h`, `linux/io.h`, `linux/kernel.h`.
• Detected declarations: `struct at91_usbh_data`, `struct ohci_at91_priv`, `function at91_start_clock`, `function at91_stop_clock`, `function at91_start_hc`, `function at91_stop_hc`, `function at91_dt_suspend_smc`, `function start`, `function usb_hcd_at91_probe`, `function ohci_at91_usb_set_power`.
• Atlas domain: Driver Families / drivers/usb.
• Implementation status: integration implementation candidate.
• 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.