FW_READY_INTERVAL
msleep(FW_READY_INTERVAL);
msleep(FW_READY_INTERVAL);
msleep(FW_READY_INTERVAL);
msleep(FW_READY_INTERVAL);
max_wait_time * FW_READY_INTERVAL, value);
(max_wait_time - max_wait_count) * FW_READY_INTERVAL);
msleep(FW_READY_INTERVAL);
msleep(FW_READY_INTERVAL);