drivers/usbhost: Support USB hubs on xHCI. - #19862

Draft

Fishwaldo wants to merge 26 commits into

apache:masterfrom

Fishwaldo:upstream-xhci-hubs

Commits on Aug 18, 2026

drivers/usbhost: Attach the xHCI interrupt after the controller starts.
Fishwaldo
committed
08e971f
drivers/usbhost: Do not disable an xHCI port while probing it.
Fishwaldo
committed
ca6502a
drivers/usbhost: Acknowledge xHCI events before walking the ring.
Fishwaldo
committed
7c27394
drivers/usbhost: Silence the xHCI interrupter until its worker has run.
Fishwaldo
committed
1d1d21c
drivers/usbhost: Set the xHCI interrupter moderation interval.
Fishwaldo
committed
e6d1f6c
drivers/usbhost: Flush the xHCI rings and structures by address.
Fishwaldo
committed
8c427cb
drivers/usbhost: Chain xHCI TRBs across a 64K boundary.
Fishwaldo
committed
3827a0c
drivers/usbhost: Maintain the cache over xHCI data buffers.
Fishwaldo
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2c52f90
drivers/usbhost: Read xHCI HCIVERSION with an aligned access.
Fishwaldo
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042f20c
drivers/usbhost: Report which xHCI command was rejected.
Fishwaldo
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84653a3
drivers/usbhost: Compute the event ring segment count at full width.
Fishwaldo
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66dfbf4
drivers/usbhost: Describe devices to an xHCI controller correctly.
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4246bb3
drivers/usbhost: Carry the xHCI transfer chain across the ring join.
Fishwaldo
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28858db
drivers/usbhost: Announce what an xHCI port has attached.
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ddabfb1
drivers/usbhost: Copy an xHCI stand-in buffer in the caller's context.
Fishwaldo
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843d5ac
drivers/usbhost: Convert the xHCI endpoint interval from the descriptor.
Fishwaldo
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67d796d
drivers/usbhost: Check for the device before allocating an endpoint.
Fishwaldo
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6682b21
drivers/usbhost: Make xHCI asynchronous transfers deliver their data.
Fishwaldo
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b0d9bb9
drivers/usbhost: Serialise xHCI transfers per endpoint.
Fishwaldo
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1e65485
drivers/usbhost: Release the xHCI slot when enumeration fails.
Fishwaldo
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471a04c
drivers/usbhost: Stop retrying an xHCI port that will not enumerate.
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5e77cd2
drivers/usbhost: Key an xHCI device by its port, not by the root port.
Fishwaldo
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407881e
usbhost: Report what a hub is on the port it occupies.
Fishwaldo
committed
047a5a0
drivers/usbhost: Describe a device behind a hub to the xHCI controller.
Fishwaldo
committed
baef606
drivers/usbhost: Support USB hubs on xHCI.
Fishwaldo
committed
0f90af5
drivers/usbhost: Tell the host stack which controller a port belongs to.
Fishwaldo
committed
25e387f

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drivers/usbhost: Support USB hubs on xHCI. - #19862

drivers/usbhost: Support USB hubs on xHCI.#19862
Fishwaldo wants to merge 26 commits into
apache:masterfrom
Fishwaldo:upstream-xhci-hubs

Commits on Aug 18, 2026

drivers/usbhost: Attach the xHCI interrupt after the controller starts.

drivers/usbhost: Do not disable an xHCI port while probing it.

drivers/usbhost: Acknowledge xHCI events before walking the ring.

drivers/usbhost: Silence the xHCI interrupter until its worker has run.

drivers/usbhost: Set the xHCI interrupter moderation interval.

drivers/usbhost: Flush the xHCI rings and structures by address.

drivers/usbhost: Chain xHCI TRBs across a 64K boundary.

drivers/usbhost: Maintain the cache over xHCI data buffers.

drivers/usbhost: Read xHCI HCIVERSION with an aligned access.

drivers/usbhost: Report which xHCI command was rejected.

drivers/usbhost: Compute the event ring segment count at full width.

drivers/usbhost: Describe devices to an xHCI controller correctly.

drivers/usbhost: Carry the xHCI transfer chain across the ring join.

drivers/usbhost: Announce what an xHCI port has attached.

drivers/usbhost: Copy an xHCI stand-in buffer in the caller's context.

drivers/usbhost: Convert the xHCI endpoint interval from the descriptor.

drivers/usbhost: Check for the device before allocating an endpoint.

drivers/usbhost: Make xHCI asynchronous transfers deliver their data.

drivers/usbhost: Serialise xHCI transfers per endpoint.

drivers/usbhost: Release the xHCI slot when enumeration fails.

drivers/usbhost: Stop retrying an xHCI port that will not enumerate.

drivers/usbhost: Key an xHCI device by its port, not by the root port.

usbhost: Report what a hub is on the port it occupies.

drivers/usbhost: Describe a device behind a hub to the xHCI controller.

drivers/usbhost: Support USB hubs on xHCI.

drivers/usbhost: Tell the host stack which controller a port belongs to.