【FAQ】全志R329出现以太网使能报No phy found或Initialize hardware error怎么解决？

[q1215200171]

1.【问题现象】

执行ifconfig eth0 up命令，出现"No phy found"或"Initialize hardware error"异常log，有如下类似打印：

root@TinaLinux:/# ifconfig eth0 up
[  130.363159] libphy: gmac0: probed
[  130.366897] sunxi-gmac gmac0 eth0: No PHY found!
ifconfig: SIOCSIFFLAGS: Invalid argument

root@TinaLinux:/# ifconfig eth0 up
[   30.109456] libphy: gmac0: probed
[   30.113921] sunxi-gmac gmac0 eth0: eth0: Type(7) PHY ID 0000ffff at 0 IRQ poll (gmac0-0:00)
[   30.133308] sunxi-gmac gmac0 eth0: Initialize hardware error

2.【问题分析】

• 出现"No phy found"，常见原因是供给phy使用的25M时钟异常，导致phy工作不正常，gmac驱动通过mdio接口也读不到phy的设备信息；
• 出现"Initialize hardware error"，一般是由于phy没有输出rx clk至mac控制器，导致mac控制器内部soft reset失败，常见原因是phy供电异常或25M时钟异常；

3.【排查步骤】

• 检查phy供电是否正常；
• 检查phy使用的25M时钟(Soc ephy25M或外部晶振)是否正常；
• 检查phy-mode是否按板级实际情况配置(mii/rmii/rgmii)；
• 检查phy-rst引脚配置是否正确；
• 检查phy芯片的rx clk和tx clk引脚信号是否正常，若出现异常，需检查phy外围电路是否符合规范；

附件：FlameGraph.tar.xz

[ubuntu]

root@TinaLinux:/# ifconfig eth0 up
[   80.396133] libphy: 4500000.eth: probed
[   80.437613] sunxi-gmac 4500000.eth eth0: eth0: Type(7) PHY ID 001cc816 at 0 IRQ poll (4500000.eth-0:00)
[   80.508656] sunxi-gmac 4500000.eth eth0: Initialize hardware error
root@TinaLinux:/#

[ubuntu]

@ubuntu

root@TinaLinux:/#
root@TinaLinux:/#
root@TinaLinux:/# ifconfig eth0 up
[   13.062114] libphy: 4500000.eth: probed
[   13.092260] sunxi-gmac 4500000.eth eth0: eth0: Type(7) PHY ID 001cc816 at 0 IRQ poll (4500000.eth-0:00)
root@TinaLinux:/#
root@TinaLinux:/#
root@TinaLinux:/# udhcpc -i eth0
udhcpc: started, v1.27.2
udhcpc: sending discover
[   16.296790] sunxi-gmac 4500000.eth eth0: Link is Up - 100Mbps/Full - flow control off
[   16.305630] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
udhcpc: sending discover
udhcpc: sending select for 192.168.141.169
udhcpc: lease of 192.168.141.169 obtained, lease time 3599
udhcpc: ifconfig eth0 192.168.141.169 netmask 255.255.255.0 broadcast 192.168.141.255
udhcpc: setting default routers: 192.168.141.72
root@TinaLinux:/#

拖焊一下D1s搞定了.