This is tool to read and write MII registers from ethernet physicals under linux. It has been tested with Realtek and Marvell PHY's connected via PCIe and should work with all drivers implementing the mdio ioctls.
mdio-tool comes with ABSOLUTELY NO WARRANTY; Use with care!
Syntax: mdio-tool [r/w] [page] devname addr
Old behavior:
mdio-tool w eth0 0x10 0x0
mdio-tool r eth0 0x0
With page processing:
mdio-tool w eth0 0x12 0x10 0x0
mdio-tool r eth0 0x12 0x0