wait_for_chan_status
ret = wait_for_chan_status(chan_hw, SWITCHTEC_CHAN_STS_HALTED, true);
ret = wait_for_chan_status(chan_hw, SWITCHTEC_CHAN_STS_HALTED, false);
ret = wait_for_chan_status(chan_hw, SWITCHTEC_CHAN_STS_PAUSED, true);
ret = wait_for_chan_status(chan_hw, SWITCHTEC_CHAN_STS_PAUSED, false);