Adds maintainers and documentation for MediaTek TMI 5G WWAN modem
device driver.
Signed-off-by: Yanchao Yang <yanchao.yang@mediatek.com>
Signed-off-by: Felix Chen <felix.chen@mediatek.com>
---
.../networking/device_drivers/wwan/index.rst | 1 +
.../networking/device_drivers/wwan/tmi.rst | 48 +++++++++++++++++++
MAINTAINERS | 11 +++++
3 files changed, 60 insertions(+)
create mode 100644 Documentation/networking/device_drivers/wwan/tmi.rst
diff --git a/Documentation/networking/device_drivers/wwan/index.rst b/Documentation/networking/device_drivers/wwan/index.rst
index 370d8264d5dc..8298629b4d55 100644
--- a/Documentation/networking/device_drivers/wwan/index.rst
+++ b/Documentation/networking/device_drivers/wwan/index.rst
@@ -10,6 +10,7 @@ Contents:
iosm
t7xx
+ tmi
.. only:: subproject and html
diff --git a/Documentation/networking/device_drivers/wwan/tmi.rst b/Documentation/networking/device_drivers/wwan/tmi.rst
new file mode 100644
index 000000000000..3655779bf692
--- /dev/null
+++ b/Documentation/networking/device_drivers/wwan/tmi.rst
@@ -0,0 +1,48 @@
+.. SPDX-License-Identifier: BSD-3-Clause-Clear
+
+.. Copyright (c) 2022, MediaTek Inc.
+
+.. _tmi_driver_doc:
+
+====================================================
+TMI driver for MTK PCIe based T-series 5G Modem
+====================================================
+The TMI(T-series Modem Interface) driver is a WWAN PCIe host driver developed
+for data exchange over PCIe interface between Host platform and MediaTek's
+T-series 5G modem. The driver exposes control plane and data plane interfaces
+to applications. The control plane provides device node interfaces for control
+data transactions. The data plane provides network link interfaces for IP data
+transactions.
+
+Control channel userspace ABI
+=============================
+/dev/wwan0at0 character device
+------------------------------
+The driver exposes an AT port by implementing AT WWAN Port.
+The userspace end of the control channel pipe is a /dev/wwan0at0 character
+device. Application shall use this interface to issue AT commands.
+
+/dev/wwan0mbim0 character device
+--------------------------------
+The driver exposes an MBIM interface to the MBIM function by implementing
+MBIM WWAN Port. The userspace end of the control channel pipe is a
+/dev/wwan0mbim0 character device. Applications shall use this interface
+for MBIM protocol communication.
+
+Data channel userspace ABI
+==========================
+wwan0-X network device
+----------------------
+The TMI driver exposes IP link interfaces "wwan0-X" of type "wwan" for IP
+traffic. Iproute network utility is used for creating "wwan0-X" network
+interfaces and for associating it with the MBIM IP session.
+
+The userspace management application is responsible for creating a new IP link
+prior to establishing an MBIM IP session where the SessionId is greater than 0.
+
+For example, creating a new IP link for an MBIM IP session with SessionId 1:
+
+ ip link add dev wwan0-1 parentdev wwan0 type wwan linkid 1
+
+The driver will automatically map the "wwan0-1" network device to MBIM IP
+session 1.
diff --git a/MAINTAINERS b/MAINTAINERS
index edd3d562beee..5224a42be5ff 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13187,6 +13187,17 @@ L: netdev@vger.kernel.org
S: Supported
F: drivers/net/wwan/t7xx/
+MEDIATEK TMI 5G WWAN MODEM DRIVER
+M: Yanchao Yang <yanchao.yang@mediatek.com>
+M: Min Dong <min.dong@mediatek.com>
+M: MediaTek Corporation <linuxwwan@mediatek.com>
+R: Liang Lu <liang.lu@mediatek.com>
+R: Haijun Liu <haijun.liu@mediatek.com>
+R: Lambert Wang <lambert.wang@mediatek.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/wwan/tmi/
+
MEDIATEK USB3 DRD IP DRIVER
M: Chunfeng Yun <chunfeng.yun@mediatek.com>
L: linux-usb@vger.kernel.org
--
2.32.0