From c56bdd05fa2cc244a3c049f2951c65af807749ce Mon Sep 17 00:00:00 2001
From: Poul-Henning Kamp <phk@FreeBSD.org>
Date: Thu, 24 Jun 2004 10:05:58 +0000
Subject: [PATCH] Add a tty-independent include file for definitions pertaining
 to serial ports.

Define the most commonly used modem signals, and delta-bit definitions
for them.
---
 sys/sys/serial.h | 62 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 sys/sys/serial.h

diff --git a/sys/sys/serial.h b/sys/sys/serial.h
new file mode 100644
index 00000000000..2e1411bcdf0
--- /dev/null
+++ b/sys/sys/serial.h
@@ -0,0 +1,62 @@
+/*-
+ * Copyright (c) 2004 Poul-Henning Kamp
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file contains definitions which pertain to serial ports as such,
+ * (both async and sync), but which do not necessarily have anything to
+ * do with tty processing.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _SYS_SERIAL_H_
+#define	_SYS_SERIAL_H_
+
+
+/*
+ * Indentification of modem control signals.  These definitions match
+ * the TIOCMGET definitions in <sys/ttycom.h> shifted a bit down, and
+ * that identity is enforced with CTASSERT at the bottom of kern/tty.c
+ * Both the modem bits and delta bits must fit in 16 bit!
+ */
+#define		SER_DTR	0x0001		/* data terminal ready */
+#define		SER_RTS	0x0002		/* request to send */
+#define		SER_STX	0x0004		/* secondary transmit */
+#define		SER_SRX	0x0008		/* secondary receive */
+#define		SER_CTS	0x0010		/* clear to send */
+#define		SER_DCD	0x0020		/* data carrier detect */
+#define		SER_RI 	0x0040		/* ring indicate */
+#define		SER_DSR	0x0080		/* data set ready */
+
+/* Delta bits, used to indicate which signals should/was affected */
+#define		SER_DDTR (SER_DTR << 8)
+#define		SER_DRTS (SER_RTS << 8)
+#define		SER_DSTX (SER_STX << 8)
+#define		SER_DSRX (SER_SRX << 8)
+#define		SER_DCTS (SER_CTS << 8)
+#define		SER_DDCD (SER_DCD << 8)
+#define		SER_DRI  (SER_RI  << 8)
+#define		SER_DDSR (SER_DSR << 8)
+
+#endif /* !_SYS_SERIAL_H_ */