FreeBSD/Linux Kernel Cross Reference
sys/sys/linedisc.h
1 /*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 2004
5 * Poul-Henning Kamp. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)conf.h 8.5 (Berkeley) 1/9/95
37 * $FreeBSD: releng/5.3/sys/sys/linedisc.h 136588 2004-10-16 08:43:07Z cvs2svn $
38 */
39
40 #ifndef _SYS_LINEDISC_H_
41 #define _SYS_LINEDISC_H_
42
43 #ifdef _KERNEL
44
45 struct tty;
46
47 typedef int l_open_t(struct cdev *dev, struct tty *tp);
48 typedef int l_close_t(struct tty *tp, int flag);
49 typedef int l_read_t(struct tty *tp, struct uio *uio, int flag);
50 typedef int l_write_t(struct tty *tp, struct uio *uio, int flag);
51 typedef int l_ioctl_t(struct tty *tp, u_long cmd, caddr_t data,
52 int flag, struct thread *td);
53 typedef int l_rint_t(int c, struct tty *tp);
54 typedef int l_start_t(struct tty *tp);
55 typedef int l_modem_t(struct tty *tp, int flag);
56
57 /*
58 * Line discipline switch table
59 */
60 struct linesw {
61 l_open_t *l_open;
62 l_close_t *l_close;
63 l_read_t *l_read;
64 l_write_t *l_write;
65 l_ioctl_t *l_ioctl;
66 l_rint_t *l_rint;
67 l_start_t *l_start;
68 l_modem_t *l_modem;
69 };
70
71 extern struct linesw *linesw[];
72 extern int nlinesw;
73
74 int ldisc_register(int , struct linesw *);
75 void ldisc_deregister(int);
76 #define LDISC_LOAD -1 /* Loadable line discipline */
77
78 l_read_t l_noread;
79 l_write_t l_nowrite;
80 l_ioctl_t l_nullioctl;
81
82 static __inline int
83 ttyld_open(struct tty *tp, struct cdev *dev)
84 {
85
86 return ((*linesw[tp->t_line]->l_open)(dev, tp));
87 }
88
89 static __inline int
90 ttyld_close(struct tty *tp, int flag)
91 {
92
93 return ((*linesw[tp->t_line]->l_close)(tp, flag));
94 }
95
96 static __inline int
97 ttyld_read(struct tty *tp, struct uio *uio, int flag)
98 {
99
100 return ((*linesw[tp->t_line]->l_read)(tp, uio, flag));
101 }
102
103 static __inline int
104 ttyld_write(struct tty *tp, struct uio *uio, int flag)
105 {
106
107 return ((*linesw[tp->t_line]->l_write)(tp, uio, flag));
108 }
109
110 static __inline int
111 ttyld_ioctl(struct tty *tp, u_long cmd, caddr_t data, int flag,
112 struct thread *td)
113 {
114
115 return ((*linesw[tp->t_line]->l_ioctl)(tp, cmd, data, flag, td));
116 }
117
118 static __inline int
119 ttyld_rint(struct tty *tp, int c)
120 {
121
122 return ((*linesw[tp->t_line]->l_rint)(c, tp));
123 }
124
125 static __inline int
126 ttyld_start(struct tty *tp)
127 {
128
129 return ((*linesw[tp->t_line]->l_start)(tp));
130 }
131
132 static __inline int
133 ttyld_modem(struct tty *tp, int flag)
134 {
135
136 return ((*linesw[tp->t_line]->l_modem)(tp, flag));
137 }
138
139 #endif /* _KERNEL */
140
141 #endif /* !_SYS_LINEDISC_H_ */
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