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Differential D57089

apple_bce/vhci: add T2 virtual USB host controller
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Authored by seuros on May 19 2026, 10:31 AM.
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F174217062: D57089.diff
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F174212098: D57089.id178082.diff
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F174206018: D57089.id179757.diff
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adrian
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rG9f90536c74b8: apple_bce/vhci: add T2 virtual USB host controller
Summary

Implements a VHCI driver on top of the BCE transport:

  • Virtual USB bus registration via usb_controller
  • Port discovery and device enumeration
  • Control, interrupt, and bulk endpoint support
  • Firmware event handling with taskqueue
  • Suspend/resume via BCE mailbox

Provides keyboard, trackpad, and Touch Bar access on T2 Macs.

Tested-on: MacBookPro16,2 (A2251), Mac mini 8,1 (A1993)

Diff Detail

Repository
rG FreeBSD src repository
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Event Timeline

seuros created this revision.May 19 2026, 10:31 AM
Herald added a subscriber: imp. · View Herald TranscriptMay 19 2026, 10:31 AM
seuros requested review of this revision.May 19 2026, 10:31 AM
Harbormaster completed remote builds in B73219: Diff 178082.May 19 2026, 10:31 AM
adrian added a parent revision: D57088: apple_bce: add Apple T2 Buffer Copy Engine driver.May 20 2026, 4:37 PM
adrian added projects: apple (x86), drivers.
adrian added a child revision: D57090: bge: read MAC from loader hint for boards without NVRAM/EEPROM.
seuros added a child revision: D56748: asmc: fix asmc_key_dump() page fault on T2 MMIO backend.May 21 2026, 6:44 PM
adrian removed a child revision: D57090: bge: read MAC from loader hint for boards without NVRAM/EEPROM.May 21 2026, 11:47 PM
adrian added a comment.May 30 2026, 1:39 AM

whew this is a whole firmware data pipe and usb controller implementation! this broadly looks okay but i'd like some other usb eyeballs on it.

adrian accepted this revision.May 30 2026, 1:39 AM
adrian added a project: USB.
This revision is now accepted and ready to land.May 30 2026, 1:39 AM
Closed by commit rG9f90536c74b8: apple_bce/vhci: add T2 virtual USB host controller (authored by seuros, committed by adrian). · Explain WhyJun 14 2026, 8:57 PM
This revision was automatically updated to reflect the committed changes.
adrian added a commit: rG9f90536c74b8: apple_bce/vhci: add T2 virtual USB host controller.

Revision Contents
Changeset List

PathSize
sys/
conf/
1 line
dev/
apple_bce/
3 lines
87 lines
5 lines
251 lines
4821 lines
usb/
controller/
1 line
modules/
apple_bce/
2 lines

Diff 179757

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sys/conf/files.amd64

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sys/dev/apple_bce/apple_bce.h

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sys/dev/apple_bce/apple_bce.c

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sys/dev/apple_bce/apple_bce_mailbox.c

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sys/dev/apple_bce/apple_bce_vhci.h

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sys/dev/apple_bce/apple_bce_vhci.c

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sys/dev/usb/controller/usb_controller.c

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sys/modules/apple_bce/Makefile

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