drivers/usb/host/xhci-tegra.c

File Facts

System

Linux kernel

Corpus path

drivers/usb/host/xhci-tegra.c

Extension

.c

Size

73135 bytes

Lines

2877

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.
• 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/clk.h
• linux/delay.h
• linux/dma-mapping.h
• linux/firmware.h
• linux/interrupt.h
• linux/iopoll.h
• linux/kernel.h
• linux/module.h
• linux/of.h
• linux/of_irq.h
• linux/phy/phy.h
• linux/phy/tegra/xusb.h
• linux/platform_device.h
• linux/usb/ch9.h
• linux/pm.h
• linux/pm_domain.h
• linux/pm_runtime.h
• linux/regulator/consumer.h
• linux/reset.h
• linux/slab.h
• linux/string_choices.h
• linux/usb/otg.h
• linux/usb/phy.h
• linux/usb/role.h
• soc/tegra/pmc.h
• xhci.h

Detected Declarations

• struct tegra_xusb_fw_header
• struct tegra_xusb_phy_type
• struct tegra_xusb_mbox_regs
• struct tegra_xusb_context_soc
• struct tegra_xusb
• struct tegra_xusb_soc_ops
• struct tegra_xusb_soc
• struct tegra_xusb_context
• struct tegra_xusb
• struct tegra_xusb_mbox_msg
• enum tegra_xusb_mbox_cmd
• function fpci_readl
• function fpci_writel
• function ipfs_readl
• function ipfs_writel
• function bar2_readl
• function bar2_writel
• function csb_readl
• function csb_writel
• function fpci_csb_readl
• function fpci_csb_writel
• function bar2_csb_readl
• function bar2_csb_writel
• function tegra_xusb_set_ss_clk
• function extract_field
• function tegra_xusb_mbox_pack
• function tegra_xusb_mbox_unpack
• function tegra_xusb_mbox_cmd_requires_ack
• function tegra_xusb_mbox_send
• function tegra_xusb_mbox_irq
• function tegra_xusb_mbox_handle
• function for_each_set_bit
• function for_each_set_bit
• function tegra_xusb_mbox_thread
• function tegra_xusb_config
• function tegra_xusb_clk_enable
• function tegra_xusb_clk_disable
• function tegra_xusb_phy_enable
• function tegra_xusb_phy_disable
• function tegra_xusb_init_context
• function tegra_xusb_init_context
• function tegra_xusb_request_firmware
• function tegra_xusb_wait_for_falcon
• function tegra_xusb_load_firmware_rom
• function tegra_xusb_read_firmware_header
• function tegra_xusb_init_ifr_firmware
• function tegra_xusb_load_firmware
• function tegra_xusb_powerdomain_remove

Annotated Snippet

module_init(tegra_xusb_init);

static void __exit tegra_xusb_exit(void)
{
	platform_driver_unregister(&tegra_xusb_driver);
}
module_exit(tegra_xusb_exit);

MODULE_AUTHOR("Andrew Bresticker <abrestic@chromium.org>");
MODULE_DESCRIPTION("NVIDIA Tegra XUSB xHCI host-controller driver");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/clk.h`, `linux/delay.h`, `linux/dma-mapping.h`, `linux/firmware.h`, `linux/interrupt.h`, `linux/iopoll.h`, `linux/kernel.h`, `linux/module.h`.
• Detected declarations: `struct tegra_xusb_fw_header`, `struct tegra_xusb_phy_type`, `struct tegra_xusb_mbox_regs`, `struct tegra_xusb_context_soc`, `struct tegra_xusb`, `struct tegra_xusb_soc_ops`, `struct tegra_xusb_soc`, `struct tegra_xusb_context`, `struct tegra_xusb`, `struct tegra_xusb_mbox_msg`.
• Atlas domain: Driver Families / drivers/usb.
• 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.