taglinefilesource code
CyDSR951drivers/char/cyclades.cif(mdm_status & CyDSR){
CyDSR1513drivers/char/cyclades.cbase_addr[CyMCOR1<<index] = CyDSR|CyCTS|CyRI|CyDCD;
CyDSR1515drivers/char/cyclades.cbase_addr[CyMCOR2<<index] = CyDSR|CyCTS|CyRI|CyDCD;
CyDSR1904drivers/char/cyclades.c| ((status  & CyDSR) ? TIOCM_DSR : 0)