[PATCH v2 0/7] I3C target mode support

Frank Li
2024-01-10T17:53:00Z

This patch introduces support for I3C target mode, which is referenced
with a PCIe Endpoint system. It also establishes a configuration framework
(configfs) for the I3C target controller driver and the I3C target function
driver

Typic usage as

The user can configure the i3c-target-tty device using configfs entry. In
order to change the vendorid, the following commands can be used

# echo 0x011b > functions/tty/func1/vendor_id
# echo 0x1000 > functions/tty/func1/part_id
# echo 0x6 > functions/tty/t/bcr

Binding i3c-target-tty Device to target Controller
------------------------------------------------

In order for the target function device to be useful, it has to be bound to
a I3C target controller driver. Use the configfs to bind the function
device to one of the controller driver present in the system::

# ln -s functions/pci_epf_test/func1 controllers/44330000.i3c-target/

Host side:
cat /dev/ttyI3C0
Taret side:
echo abc >/dev/ttyI3C0

Change from v1 to v2
- change "slave" to "target"
- include master side tty patch
- fixed dtbcheck problem
- fixed kerne-doc check warning

Some review comment may be lost since it is quite long time since v1. Now
master side dependent patches already in linux-next. So sent target side
patches with tty support again.

No sure why an additional "\r\n" appended.

Frank Li (7):
i3c: add target mode support
dt-bindings: i3c: svc: add compatible string i3c:
silvaco,i3c-target-v1
Documentation: i3c: Add I3C target mode controller and function
i3c: target: add svc target controller support
i3c: target: func: add tty driver
i3c: add API i3c_dev_gettstatus_format1() to get target device status
tty: i3c: add TTY over I3C master support

.../bindings/i3c/silvaco,i3c-master.yaml | 7 +-
Documentation/driver-api/i3c/index.rst | 1 +
.../driver-api/i3c/target/i3c-target-cfs.rst | 109 +++
.../driver-api/i3c/target/i3c-target.rst | 189 +++++
.../driver-api/i3c/target/i3c-tty-howto.rst | 109 +++
Documentation/driver-api/i3c/target/index.rst | 13 +
drivers/i3c/Kconfig | 32 +-
drivers/i3c/Makefile | 4 +
drivers/i3c/device.c | 24 +
drivers/i3c/func/Kconfig | 9 +
drivers/i3c/func/Makefile | 3 +
drivers/i3c/func/tty.c | 475 +++++++++++
drivers/i3c/i3c-cfs.c | 389 +++++++++
drivers/i3c/internals.h | 1 +
drivers/i3c/master.c | 26 +
drivers/i3c/target.c | 453 ++++++++++
drivers/i3c/target/Kconfig | 9 +
drivers/i3c/target/Makefile | 4 +
drivers/i3c/target/svc-i3c-target.c | 795 ++++++++++++++++++
drivers/tty/Kconfig | 13 +
drivers/tty/Makefile | 1 +
drivers/tty/i3c_tty.c | 426 ++++++++++
include/linux/i3c/device.h | 1 +
include/linux/i3c/target.h | 511 +++++++++++
24 files changed, 3600 insertions(+), 4 deletions(-)
create mode 100644 Documentation/driver-api/i3c/target/i3c-target-cfs.rst
create mode 100644 Documentation/driver-api/i3c/target/i3c-target.rst
create mode 100644 Documentation/driver-api/i3c/target/i3c-tty-howto.rst
create mode 100644 Documentation/driver-api/i3c/target/index.rst
create mode 100644 drivers/i3c/func/Kconfig
create mode 100644 drivers/i3c/func/Makefile
create mode 100644 drivers/i3c/func/tty.c
create mode 100644 drivers/i3c/i3c-cfs.c
create mode 100644 drivers/i3c/target.c
create mode 100644 drivers/i3c/target/Kconfig
create mode 100644 drivers/i3c/target/Makefile
create mode 100644 drivers/i3c/target/svc-i3c-target.c
create mode 100644 drivers/tty/i3c_tty.c
create mode 100644 include/linux/i3c/target.h

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2.34.1