OVLYDMACTL
asd_write_reg_dword(asd_ha, OVLYDMACTL, reg);
u32 dmadone = asd_read_reg_dword(asd_ha, OVLYDMACTL);
asd_write_reg_dword(asd_ha, OVLYDMACTL, reg);
asd_write_reg_dword(asd_ha, OVLYDMACTL, reg);