drivers/usb/gadget/udc/aspeed-vhub/dev.c

File Facts

System

Linux kernel

Corpus path

drivers/usb/gadget/udc/aspeed-vhub/dev.c

Extension

.c

Size

14701 bytes

Lines

613

Domain

Driver Families

Bucket

drivers/usb

Inferred role

Driver Families: implementation source

Status

source 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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• 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/kernel.h
• linux/module.h
• linux/platform_device.h
• linux/delay.h
• linux/ioport.h
• linux/slab.h
• linux/errno.h
• linux/list.h
• linux/interrupt.h
• linux/proc_fs.h
• linux/prefetch.h
• linux/clk.h
• linux/usb/gadget.h
• linux/of.h
• linux/regmap.h
• linux/dma-mapping.h
• linux/usb.h
• linux/usb/hcd.h
• vhub.h

Detected Declarations

• function ast_vhub_dev_irq
• function ast_vhub_dev_enable
• function ast_vhub_dev_disable
• function ast_vhub_dev_feature
• function ast_vhub_ep_feature
• function ast_vhub_dev_status
• function ast_vhub_ep_status
• function ast_vhub_dev_set_address
• function ast_vhub_std_dev_request
• function ast_vhub_udc_wakeup
• function ast_vhub_udc_get_frame
• function ast_vhub_dev_nuke
• function ast_vhub_udc_pullup
• function ast_vhub_udc_start
• function ast_vhub_udc_stop
• function ast_vhub_dev_suspend
• function ast_vhub_dev_resume
• function ast_vhub_dev_reset
• function ast_vhub_del_dev
• function ast_vhub_dev_release
• function ast_vhub_init_dev

Annotated Snippet

rc = device_add(d->port_dev);
	if (rc)
		goto fail_add;

	/* Populate gadget */
	INIT_LIST_HEAD(&d->gadget.ep_list);
	d->gadget.ops = &ast_vhub_udc_ops;
	d->gadget.ep0 = &d->ep0.ep;
	d->gadget.name = KBUILD_MODNAME;
	if (vhub->force_usb1)
		d->gadget.max_speed = USB_SPEED_FULL;
	else
		d->gadget.max_speed = USB_SPEED_HIGH;
	d->gadget.speed = USB_SPEED_UNKNOWN;
	d->gadget.dev.of_node = vhub->pdev->dev.of_node;
	dev_set_of_node_reused(&d->gadget.dev);

	rc = usb_add_gadget_udc(d->port_dev, &d->gadget);
	if (rc != 0)
		goto fail_udc;
	d->registered = true;

	return 0;
 fail_udc:
	device_del(d->port_dev);
 fail_add:
	put_device(d->port_dev);
 fail_alloc:
	kfree(d->epns);

	return rc;
}

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/module.h`, `linux/platform_device.h`, `linux/delay.h`, `linux/ioport.h`, `linux/slab.h`, `linux/errno.h`, `linux/list.h`.
• Detected declarations: `function ast_vhub_dev_irq`, `function ast_vhub_dev_enable`, `function ast_vhub_dev_disable`, `function ast_vhub_dev_feature`, `function ast_vhub_ep_feature`, `function ast_vhub_dev_status`, `function ast_vhub_ep_status`, `function ast_vhub_dev_set_address`, `function ast_vhub_std_dev_request`, `function ast_vhub_udc_wakeup`.
• Atlas domain: Driver Families / drivers/usb.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.