SDMA_SDCM_AR
GT_SDMA_WRITE(sc, SDMA_SDCM, SDMA_SDCM_AR | SDMA_SDCM_STD);
if (!(csr & (SDMA_SDCM_AR | SDMA_SDCM_AT)))
GT_SDMA_WRITE(sc, SDMA_SDCM, SDMA_SDCM_AR);