disad100base

#!/bin/sh /etc/rc.common

START=50

ad100base_ctrl() { # <dev> <port> <0|1>
        local val=0

        swconfig dev $1 set phy $2

        # Auto-Negotiation Advertisement
        # 4.7 100BASE-TX
        # 4.8 100BASE-TX full duplex
        swconfig dev $1 set reg 4
        val=$(swconfig dev $1 get val)
        swconfig dev $1 set val $((val^(-$3^val)&0x180))

        # 0.9 Restart Auto-Negotiation
        swconfig dev $1 set reg 0
        val=$(swconfig dev $1 get val)
        swconfig dev $1 set val $((val^(-1^val)&0x200))
}

start() {
        local port=0

        for port in $(seq 0 3)
                do ad100base_ctrl eth0 $port 0
                logger -t switch disabled Auto-Negotiation Advertisement for 100BASE-TX on port $port
        done
}

stop() {
        local port=0

        for port in $(seq 0 3)
                do ad100base_ctrl eth0 $port 1
                logger -t switch enabled Auto-Negotiation Advertisement for 100BASE-TX on port $port
        done
}