[PATCH v7 00/22] i3c: aspeed: Add I3C support

Jamin Lin
2026-02-25T02:12:35Z

v1:
The initial patch series was based on work by Joe Komlodi <komlodi@google.com>.

This series adds I3C bus support to QEMU and adds more functionality to the
Aspeed I3C controller.

This implementation is a basic implementation that introduces IBIs
(including hot-join), CCCs, and SDR data transfer. As-is, it doesn't support
multi-controller buses or HDR transfers.

First we add the I3C bus and controller model. With that added we extend
the functionality of the Aspeed I3C controller so it can do transfers
and handle IBIs.

Next, we add a mock I3C target. It's intended to be a very simple target
just to verify that I3C is working on the guest. Internally, we've used it
on Linux to verify that i3C devices can be probed and can send/receive data
and IBIs.
This target is sort of like an EEPROM, and it can also send IBIs upon
reception of a user-defined magic number.

Lastly we add hotplugging support. The hotplugging doesn't do anything too
complicated, it just adds the device attempting to hotplug to the bus. It
is the device's responsibility to hot-join and go through the DAA process
to participate on the bus.

v2:
Jamin Lin <jamin_lin@aspeedtech.com> has taken ownership of the I3C patch
series for upstream submission.

Changes in this version include:

1. Added I3C functional tests.
2. Updated patch 4 to refine register field definitions.
3. Updated patch 7 to correct read-only register field masks.

v3:
1. Add Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
2. Fix a typo
3. Fix ASPEED mail server issue

v4:
1. Add Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com> at the end of each patch.

v5:
1. Address review feedback by updating the I3C bus and device to use the
DEFINE_TYPES() macro instead of an explicit type registration function.
2. Rename variables to `parent_obj` for the parent object and `parent_class`
for the parent class to comply with QEMU QOM coding style guidelines.

v6:
1. Add I3C maintainers and reviewer

v7:
1. Add I3C maintainers and reviewer

Jamin Lin (3):
hw/i3c/aspeed_i3c: Switch to DEFINE_TYPES() and align parent_obj
naming
tests/functional/arm/test_aspeed_ast2600_sdk: Add i3c functional test
MAINTAINERS: Add I3C maintainers and reviewer

Joe Komlodi (19):
hw/misc/aspeed_i3c: Move to i3c directory
hw/i3c: Add bus support
hw/i3c: Split DesignWare I3C out of Aspeed I3C
hw/i3c/dw-i3c: Add more register fields
hw/i3c/aspeed_i3c: Add more register fields
hw/i3c/dw-i3c: Add more reset values
hw/i3c/aspeed_i3c: Add register RO field masks
hw/i3c/dw-i3c: Add register RO field masks
hw/i3c/dw-i3c: Treat more registers as read-as-zero
hw/i3c/dw-i3c: Use 32 bits on MMIO writes
hw/i3c/dw-i3c: Add IRQ MMIO behavior
hw/i3c/dw-i3c: Add data TX and RX
hw/i3c/dw-i3c: Add IBI handling
hw/i3c/dw-i3c: Add ctrl MMIO handling
hw/i3c/dw-i3c: Add controller resets
hw/i3c/aspeed: Add I3C bus get function
hw/i3c: Add Mock target
hw/arm/aspeed: Build with I3C_DEVICES
hw/i3c: Add hotplug support

MAINTAINERS | 13 +
meson.build | 1 +
hw/i3c/trace.h | 2 +
include/hw/arm/aspeed_soc.h | 2 +-
include/hw/{misc => i3c}/aspeed_i3c.h | 31 +-
include/hw/i3c/dw-i3c.h | 199 ++
include/hw/i3c/i3c.h | 277 +++
include/hw/i3c/mock-i3c-target.h | 52 +
hw/i3c/aspeed_i3c.c | 258 +++
hw/i3c/core.c | 664 ++++++
hw/i3c/dw-i3c.c | 1862 +++++++++++++++++
hw/i3c/mock-i3c-target.c | 298 +++
hw/misc/aspeed_i3c.c | 383 ----
hw/Kconfig | 1 +
hw/arm/Kconfig | 3 +
hw/i3c/Kconfig | 15 +
hw/i3c/meson.build | 6 +
hw/i3c/trace-events | 48 +
hw/meson.build | 1 +
hw/misc/meson.build | 1 -
hw/misc/trace-events | 6 -
.../functional/arm/test_aspeed_ast2600_sdk.py | 12 +
22 files changed, 3723 insertions(+), 412 deletions(-)
create mode 100644 hw/i3c/trace.h
rename include/hw/{misc => i3c}/aspeed_i3c.h (53%)
create mode 100644 include/hw/i3c/dw-i3c.h
create mode 100644 include/hw/i3c/i3c.h
create mode 100644 include/hw/i3c/mock-i3c-target.h
create mode 100644 hw/i3c/aspeed_i3c.c
create mode 100644 hw/i3c/core.c
create mode 100644 hw/i3c/dw-i3c.c
create mode 100644 hw/i3c/mock-i3c-target.c
delete mode 100644 hw/misc/aspeed_i3c.c
create mode 100644 hw/i3c/Kconfig
create mode 100644 hw/i3c/meson.build
create mode 100644 hw/i3c/trace-events

--
2.43.0