MDIO

Table of Contents

• Features Supported
• Features NOT Supported
• Example Usage
• API

MDIO driver provides an interface to the MDIO management interface module which implements the 802.3 serial management interface to interrogate and control the Ethernet PHYs on the board.

Features Supported

• Initialize MDIO clock
• Ethernet PHY register access (IEEE defined registers and extended registers)
• Read the link status of Ethernet PHY
• Enable link change Interrupt

Features NOT Supported

NA

Example Usage

Include the below file to access the APIs

#include <drivers/mdio.h>

Initializing MDIO clock

    status = MDIO_initClock(mdioBaseAddress);
 
    DebugP_assert(status == SystemP_SUCCESS);

Reading PHY link status for a PHY connected to MDIO

    status = MDIO_phyLinkStatus(mdioBaseAddress, phyAddress);

Reading/writing a PHY register using MDIO

    uint16_t phyRegVal;
 
    /* Read a PHY register */
    status = MDIO_phyRegRead(mdioBaseAddress, NULL, phyAddress, 0, &phyRegVal);
 
    /* Write a PHY register */
    status = MDIO_phyRegWrite(mdioBaseAddress, NULL, phyAddress, 0, phyRegVal);

API

APIs for MDIO