am3352的网口配置成mii模式网络ping不通

am3352使用port1连接marvell6095，使用mii模式。管脚配置如下：

static struct pinmux_config mii1_pin_mux[] = {
{"mii1_rxerr.mii1_rxerr", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLDOWN},
{"mii1_txen.mii1_txen", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT},
{"mii1_rxdv.mii1_rxdv", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLDOWN},
{"mii1_txd3.mii1_txd3", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT},
{"mii1_txd2.mii1_txd2", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT},
{"mii1_txd1.mii1_txd1", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT},
{"mii1_txd0.mii1_txd0", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT},
{"mii1_txclk.mii1_txclk", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLDOWN},
{"mii1_rxclk.mii1_rxclk", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLDOWN},
{"mii1_rxd3.mii1_rxd3", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLDOWN},
{"mii1_rxd2.mii1_rxd2", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLDOWN},
{"mii1_rxd1.mii1_rxd1", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLDOWN},
{"mii1_rxd0.mii1_rxd0", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLDOWN},
{"mdio_data.mdio_data", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"mdio_clk.mdio_clk", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT_PULLUP},
{NULL, 0},
};

设置网卡工作模式：

static void setup_cm335x(void)
{
/* DEVKIT8600 has Micro-SD slot which doesn't have Write Protect pin */
am335x_mmc[0].gpio_wp = -EINVAL;

_configure_device(EVM_SK, cm335x_dev_cfg, PROFILE_NONE);

am33xx_cpsw_init(AM33XX_CPSW_MODE_MII, NULL, NULL);
}

mdio可以扫描到所有phy，mii时钟测试是25mhz。其他地方没有修改，但是ping不通。原始代码是使用rgmii和ar8035网络是通的，rgmii的管脚配置如下：

static struct pinmux_config rgmii1_pin_mux[] = {
{"mii1_txen.rgmii1_tctl", OMAP_MUX_MODE2 | AM33XX_PIN_OUTPUT},
{"mii1_rxdv.rgmii1_rctl", OMAP_MUX_MODE2 | AM33XX_PIN_INPUT_PULLDOWN},
{"mii1_txd3.rgmii1_td3", OMAP_MUX_MODE2 | AM33XX_PIN_OUTPUT},
{"mii1_txd2.rgmii1_td2", OMAP_MUX_MODE2 | AM33XX_PIN_OUTPUT},
{"mii1_txd1.rgmii1_td1", OMAP_MUX_MODE2 | AM33XX_PIN_OUTPUT},
{"mii1_txd0.rgmii1_td0", OMAP_MUX_MODE2 | AM33XX_PIN_OUTPUT},
{"mii1_txclk.rgmii1_tclk", OMAP_MUX_MODE2 | AM33XX_PIN_OUTPUT},
{"mii1_rxclk.rgmii1_rclk", OMAP_MUX_MODE2 | AM33XX_PIN_INPUT_PULLDOWN},
{"mii1_rxd3.rgmii1_rd3", OMAP_MUX_MODE2 | AM33XX_PIN_INPUT_PULLDOWN},
{"mii1_rxd2.rgmii1_rd2", OMAP_MUX_MODE2 | AM33XX_PIN_INPUT_PULLDOWN},
{"mii1_rxd1.rgmii1_rd1", OMAP_MUX_MODE2 | AM33XX_PIN_INPUT_PULLDOWN},
{"mii1_rxd0.rgmii1_rd0", OMAP_MUX_MODE2 | AM33XX_PIN_INPUT_PULLDOWN},
{"mdio_data.mdio_data", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"mdio_clk.mdio_clk", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT_PULLUP},
{NULL, 0},
};

请问我这样修改为mii为什么网络会不通？

请帮忙分析下，谢谢