CNTLREG1
amd_write8(amd, CNTLREG1, tinfo->CtrlR1);
amd_write8(amd, CNTLREG1, DIS_INT_ON_SCSI_RST);
bval = amd_read8(amd, CNTLREG1);
amd_write8(amd, CNTLREG1, bval); /* disable interrupt */
bval = amd_read8(amd, CNTLREG1);
amd_write8(amd, CNTLREG1, bval); /* re-enable interrupt */
amd_write8(amd, CNTLREG1, targ_info->CtrlR1);