+/*
+ * Enable the IrDA function if tty->ldisc.num is N_IRDA.
+ * In other cases, disable IrDA function.
+ */
+static void bfin_set_ldisc(struct tty_struct *tty)
+{
+ int line = tty->index;
+ unsigned short val;
+
+ if (line >= tty->driver->num)
+ return;
+
+ switch (tty->ldisc.num) {
+ case N_IRDA:
+ val = UART_GET_GCTL(&bfin_serial_ports[line]);
+ val |= (IREN | RPOLC);
+ UART_PUT_GCTL(&bfin_serial_ports[line], val);
+ break;
+ default:
+ val = UART_GET_GCTL(&bfin_serial_ports[line]);
+ val &= ~(IREN | RPOLC);
+ UART_PUT_GCTL(&bfin_serial_ports[line], val);
+ }
+}
+