From: rlfnb <rlfnb@rlfnb.de>
Date: Sat, 6 Feb 2016 20:08:50 +0000 (+0100)
Subject: ifdef for switching RTS/CTS off
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/zpipe.c?a=commitdiff_plain;h=eaf726b35ce8d28cda2c17c0d7bd2e8599963895;p=minix.git

ifdef for switching RTS/CTS off

Change-Id: Iccc4b151b2047539dfd79ce0ff1381c0579539e9
---

diff --git a/minix/drivers/tty/tty/arch/i386/rs232.c b/minix/drivers/tty/tty/arch/i386/rs232.c
index d65107740..a61765262 100644
--- a/minix/drivers/tty/tty/arch/i386/rs232.c
+++ b/minix/drivers/tty/tty/arch/i386/rs232.c
@@ -11,6 +11,11 @@
 
 #if NR_RS_LINES > 0
 
+/* switch RTS/CTS on/off */
+#if !defined(UART_RTSCTS_OFF)
+#define UART_RTSCTS_OFF 0 /* 0: Use RTS/CTS, 1: Don't.*/
+#endif
+
 /* 8250 constants. */
 #define UART_FREQ         115200L	/* timer frequency */
 
@@ -86,6 +91,18 @@
  * dropped by close of the device).
  * OUT2 is also kept high all the time.
  */
+#if UART_RTSCTS_OFF
+#define istart(rs) \
+	(rs)->idevready = TRUE
+
+#define istop(rs) \
+		(rs)->idevready = FALSE
+
+/* Macro to tell if device is ready.  The rs->cts field is set to MS_CTS if
+ * CLOCAL is in effect for a line without a CTS wire.
+ */
+#define devready(rs) MS_CTS
+#else
 #define istart(rs) \
 	(sys_outb((rs)->modem_ctl_port, MC_OUT2 | MC_RTS | MC_DTR), \
 		(rs)->idevready = TRUE)
@@ -98,6 +115,8 @@
  */
 #define devready(rs) ((my_inb(rs->modem_status_port) | rs->cts) & MS_CTS)
 
+#endif
+
 /* Macro to tell if transmitter is ready. */
 #define txready(rs) (my_inb(rs->line_status_port) & LS_TRANSMITTER_READY)
 
@@ -507,9 +526,12 @@ void rs_init(tty_t *tp)
   }
 
   rs_irq_set |= (1 << irq);
-
+#if UART_RTSCTS_OFF
+  sys_outb(rs->int_enab_port, IE_LINE_STATUS_CHANGE | IE_RECEIVER_READY | IE_TRANSMITTER_READY);
+#else
   sys_outb(rs->int_enab_port, IE_LINE_STATUS_CHANGE | IE_MODEM_STATUS_CHANGE
 				| IE_RECEIVER_READY | IE_TRANSMITTER_READY);
+#endif
 
   /* Fill in TTY function hooks. */
   tp->tty_devread = rs_read;