RDMAC_MODE
rdmac_mode |= tr32(RDMAC_MODE) & RDMAC_MODE_H2BNC_VLAN_DET;
tw32_f(RDMAC_MODE, rdmac_mode);
tw32_f(RDMAC_MODE, RDMAC_MODE_ENABLE);
tg3_rd32_loop(tp, regs, RDMAC_MODE, 0x08);
err |= tg3_stop_block(tp, RDMAC_MODE, RDMAC_MODE_ENABLE, silent);