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SGMII自协商通不过



DSP6678的网口0接88E1112,网口1接PHY芯片88E1111,在执行platform intial的时候,网口初始化一直不能够完成,查找原因是自协商不通过,一直循环的代码如下:

        /* Wait for SGMII Autonegotiation to complete without error */

        do

        {

            CSL_SGMII_getStatus(macPortNum, &sgmiiStatus);

            if (sgmiiStatus.bIsAutoNegError != 0)

                return; /* This is an error condition */

        } while (sgmiiStatus.bIsAutoNegComplete != 1);

我在初始化的时候,只对网口1进行初始化,网口1设计与EVM完全一样,为什么自协商不能够通过呢?