IP22ZILOG_FLAG_TX_STOPPED
up->flags &= ~IP22ZILOG_FLAG_TX_STOPPED;
up->flags |= IP22ZILOG_FLAG_TX_STOPPED;
up->flags &= ~IP22ZILOG_FLAG_TX_STOPPED;
#define ZS_TX_STOPPED(UP) ((UP)->flags & IP22ZILOG_FLAG_TX_STOPPED)