1 /* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */
2 /* r3964 linediscipline for linux
3  *
4  * -----------------------------------------------------------
5  * Copyright by
6  * Philips Automation Projects
7  * Kassel (Germany)
8  * -----------------------------------------------------------
9  * This software may be used and distributed according to the terms of
10  * the GNU General Public License, incorporated herein by reference.
11  *
12  * Author:
13  * L. Haag
14  *
15  * $Log: r3964.h,v $
16  * Revision 1.4  2005/12/21 19:54:24  Kurt Huwig <kurt huwig de>
17  * Fixed HZ usage on 2.6 kernels
18  * Removed unnecessary include
19  *
20  * Revision 1.3  2001/03/18 13:02:24  dwmw2
21  * Fix timer usage, use spinlocks properly.
22  *
23  * Revision 1.2  2001/03/18 12:53:15  dwmw2
24  * Merge changes in 2.4.2
25  *
26  * Revision 1.1.1.1  1998/10/13 16:43:14  dwmw2
27  * This'll screw the version control
28  *
29  * Revision 1.6  1998/09/30 00:40:38  dwmw2
30  * Updated to use kernel's N_R3964 if available
31  *
32  * Revision 1.4  1998/04/02 20:29:44  lhaag
33  * select, blocking, ...
34  *
35  * Revision 1.3  1998/02/12 18:58:43  root
36  * fixed some memory leaks
37  * calculation of checksum characters
38  *
39  * Revision 1.2  1998/02/07 13:03:17  root
40  * ioctl read_telegram
41  *
42  * Revision 1.1  1998/02/06 19:19:43  root
43  * Initial revision
44  *
45  *
46  */
47 
48 #ifndef _UAPI__LINUX_N_R3964_H__
49 #define _UAPI__LINUX_N_R3964_H__
50 
51 /* line disciplines for r3964 protocol */
52 
53 
54 /*
55  * Ioctl-commands
56  */
57 
58 #define R3964_ENABLE_SIGNALS      0x5301
59 #define R3964_SETPRIORITY         0x5302
60 #define R3964_USE_BCC             0x5303
61 #define R3964_READ_TELEGRAM       0x5304
62 
63 /* Options for R3964_SETPRIORITY */
64 #define R3964_MASTER   0
65 #define R3964_SLAVE    1
66 
67 /* Options for R3964_ENABLE_SIGNALS */
68 #define R3964_SIG_ACK   0x0001
69 #define R3964_SIG_DATA  0x0002
70 #define R3964_SIG_ALL   0x000f
71 #define R3964_SIG_NONE  0x0000
72 #define R3964_USE_SIGIO 0x1000
73 
74 /*
75  * r3964 operation states:
76  */
77 
78 /* types for msg_id: */
79 enum {R3964_MSG_ACK=1, R3964_MSG_DATA };
80 
81 #define R3964_MAX_MSG_COUNT 32
82 
83 /* error codes for client messages */
84 #define R3964_OK 0        /* no error. */
85 #define R3964_TX_FAIL -1  /* transmission error, block NOT sent */
86 #define R3964_OVERFLOW -2 /* msg queue overflow */
87 
88 /* the client gets this struct when calling read(fd,...): */
89 struct r3964_client_message {
90 	  int     msg_id;
91 	  int     arg;
92 	  int     error_code;
93 };
94 
95 #define R3964_MTU      256
96 
97 
98 
99 #endif /* _UAPI__LINUX_N_R3964_H__ */
100