LAN9500A+LAN9303+Linux没有响应

在解决了另一个线程中提到的硬件问题之后，我仍然对这个组合有问题。该系统是一个运行Linux的ARM SOM，一个通过MII连接到LAN9303的LAN9500A USB MAC。9500A使用标准Linux驱动程序smsc95xx v1.0.4，配置在/etc/network/interface中，具有静态IP地址。9303为I2C配置，它有一个空EEPROM，所以它使用它的电源默认值。我可以通过Linux I2C驱动程序与EEPROM和9303进行通信。如果我将外部端口之一连接到网络，LED就会亮起来，而且我可以看到Tx和Rx上的空闲模式，但是无论输入还是输出，我都不能进行ping操作。出站ping命令认为它成功地传输，但没有得到任何响应。当没有ping时，ifconfig命令仍然显示Rx包大约每秒进入一次，但是没有Tx包：“.:0”正常吗？我的第一个简单问题是：9500A+9303组合应该是“开箱即用”的，没有特殊配置吗？或者，为了使它成为生命的源泉，我必须写一些最少的寄存器吗？如果它应该工作，我需要在9303个寄存器中检查吗？我有Python脚本，我可以用来通过I2C读或写它们。



      以下为原文

    After having solved a hardware problem mentioned in another thread, I still have a problem with this combo.

The system is an ARM SOM running Linux, a LAN9500A USB MAC connected via MII to a LAN9303. The 9500A is using the standard Linux driver, smsc95xx v1.0.4, configured in /etc/network/interfaces with a static IP address. The 9303 is strapped for I2C configuration, and has an empty EEPROM, so it's using its power-on defaults. I can talk to the EEPROM and to the 9303 through the Linux I2C driver.

If I connect one of the external ports to my network, the LEDs light up, and I can see the idle pattern on both Tx and Rx with a scope, yet I can't ping either in or out. The outbound ping command thinks it's successfully transmitting, but doesn't get any responses. When not pinging, the ifconfig command still shows Rx packets coming in about once per second, but no Tx packets:

eth1 Link encap:Ethernet HWaddr 1A:D4:57:AD:37:F0
          inet addr:192.168.123.222 Bcast:192.168.123.255 Mask:255.255.255.0
          UP BROADCAST MULTICAST MTU:1488 Metric:1
          RX packets:26 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:4738 (4.6 KiB) TX bytes:0 (0.0 B)

Is the "carrier:0" normal?

My first simple question is this: Is the 9500A+9303 combo supposed to work "out of the box", with no special configuration? Or is there some minimal number of registers I have to write in order to get it to spring to life?

If it's supposed to work, is there anything I should check in the 9303 registers? I have Python scripts that I can use to read or write them via I2C.