[FS#340] brcm63xx: faulty ethernet link detection

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - Daniel González Cabanelas (danitool) 

Attached to Project - LEDE Project
Summary - brcm63xx: faulty ethernet link detection
Task Type - Bug Report
Category - Kernel
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Medium
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - Device: Inventel Livebox 1
  * BCM6348 SoC
  * Two ethernet ports:
     * 1 internal phy
     * 1 external phy, Altima AC101 phy

Looks like there is a bug at the ethernet phy driver in the kernel:

  * The eth0 (internal phy) interface doesn't detect LINK activity when connecting/disconnecting the ethernet cable, it's always UP

  * The eth1 (external phy) interface  detects LINK activity when connecting/disconnecting the ethernet cable, but always with **HALF** speed when the cable is connected

[   33.630022] device eth0 entered promiscuous mode
[   33.658602] IPv6: ADDRCONF(NETDEV_UP): br-lan: link is not ready
[   33.778651] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
[   35.601615] eth1: link UP - 100/half - flow control off
[   35.617617] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready



With an old Openwrt version (Attitude Adjustment), the LINK detection works perfect on both interfaces
[  140.208000] eth0: link DOWN
[  146.896000] eth1: link UP - 100/full - flow control off
[  146.900000] br-lan: port 1(eth1) entered forwarding state
[  146.908000] br-lan: port 1(eth1) entered forwarding state
[  148.912000] br-lan: port 1(eth1) entered forwarding state
[  204.900000] eth1: link DOWN
[  204.900000] br-lan: port 1(eth1) entered disabled state
[  206.308000] eth0: link UP - 100/full - flow control off



More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=340