On Fri, 14 Jan 2022 at 02:06, Ricardo Martinez <ricardo.martinez@xxxxxxxxxxxxxxx> wrote: > > t7xx is the PCIe host device driver for Intel 5G 5000 M.2 solution which > is based on MediaTek's T700 modem to provide WWAN connectivity. > The driver uses the WWAN framework infrastructure to create the following > control ports and network interfaces: > * /dev/wwan0mbim0 - Interface conforming to the MBIM protocol. > Applications like libmbim [1] or Modem Manager [2] from v1.16 onwards > with [3][4] can use it to enable data communication towards WWAN. > * /dev/wwan0at0 - Interface that supports AT commands. > * wwan0 - Primary network interface for IP traffic. > > The main blocks in t7xx driver are: > * PCIe layer - Implements probe, removal, and power management callbacks. > * Port-proxy - Provides a common interface to interact with different types > of ports such as WWAN ports. > * Modem control & status monitor - Implements the entry point for modem > initialization, reset and exit, as well as exception handling. > * CLDMA (Control Layer DMA) - Manages the HW used by the port layer to send > control messages to the modem using MediaTek's CCCI (Cross-Core > Communication Interface) protocol. > * DPMAIF (Data Plane Modem AP Interface) - Controls the HW that provides > uplink and downlink queues for the data path. The data exchange takes > place using circular buffers to share data buffer addresses and metadata > to describe the packets. > * MHCCIF (Modem Host Cross-Core Interface) - Provides interrupt channels > for bidirectional event notification such as handshake, exception, PM and > port enumeration. > > The compilation of the t7xx driver is enabled by the CONFIG_MTK_T7XX config > option which depends on CONFIG_WWAN. > This driver was originally developed by MediaTek. Intel adapted t7xx to > the WWAN framework, optimized and refactored the driver source in close > collaboration with MediaTek. This will enable getting the t7xx driver on > Approved Vendor List for interested OEM's and ODM's productization plans > with Intel 5G 5000 M.2 solution. >From a WWAN framework perspective: Reviewed-by: Loic Poulain <loic.poulain@xxxxxxxxxx>
