dm9620 usb转mac芯片

dm9620 是个带eeprom的usb转mac接口的芯片。

这里解决了一个bug， 物理地址设置不进自身eeprom的问题，原因是linux版本不兼容，设置物理地址的接口没有实现：

在dm9620_bind() 函数中，添加 dev->net->set_mac_address = dm9620_set_mac_address， 这样就实现了该接口。

static int dm9620_bind(struct usbnet *dev, struct usb_interface *intf)
{
        int ret,mdio_val,i;
        struct dm96xx_priv* priv;
        u8 temp;
        u8 tmp;

        ret = usbnet_get_endpoints(dev, intf);
        if (ret)
                goto out;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)
        dev->net->netdev_ops = &vm_netdev_ops; // new kernel 2.6.31  (20091217JJ)
        dev->net->ethtool_ops = &dm9620_ethtool_ops;
#else
        dev->net->do_ioctl = dm9620_ioctl;
        dev->net->set_multicast_list = dm9620_set_multicast;
        dev->net->ethtool_ops = &dm9620_ethtool_ops;

        dev->net->set_mac_address = dm9620_set_mac_address;
        
#endif
        dev->net->hard_header_len += DM_TX_OVERHEAD;
        dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
        dev->rx_urb_size = dev->net->mtu + ETH_HLEN + DM_RX_OVERHEAD+1; // ftp fail fixed

        dev->mii.dev = dev->net;
        dev->mii.mdio_read = dm9620_mdio_read;
        dev->mii.mdio_write = dm9620_mdio_write;
        dev->mii.phy_id_mask = 0x1f;
        dev->mii.reg_num_mask = 0x1f;
        dev->mii.phy_id = DM9620_PHY_ID;

ifconfig eth0 hw ether 01:21:42:23:43:34