BT_BMC_BUSY
if (bmc_io_wait(sc, _BT_CTRL_REG, BT_BMC_BUSY, 0, __func__) < 0)
if (bmc_io_wait(sc, _BT_CTRL_REG, BT_HOST2BMC_ATN | BT_BMC_BUSY, 0,
printf(" BBSY : %2x\n", v & BT_BMC_BUSY);