Discussion and code related to generic PHY and MDIO in Linux kernel.

• Wikipedia page on MDIO
• Total Phase "MDIO Background"
• Electronic Design "Use The MDIO Bus To Interrogate Complex Devices"
• IEEE "MDIO for IEEE 802.3ah"
• IEEE "Management Registers and MIB Objects"

• MDIO: Management Data Input/Output
• MMD: MDIO Manageable Devices
• MDC: Management Data Clock
• PHY: Physical Layer Protocol
• STA: Station Management Entity