EDRRR
sh_eth_write(ndev, EDRRR_R, EDRRR);
sh_eth_write(ndev, 0, EDRRR);
if (!(sh_eth_read(ndev, EDRRR) & EDRRR_R)) {
sh_eth_write(ndev, EDRRR_R, EDRRR);
[EDRRR] = 0x0210,
add_reg(EDRRR);
[EDRRR] = 0x0010,
[EDRRR] = 0x0008,
[EDRRR] = 0x0410,