File: /usr/src/linux/drivers/char/rio/pkt.h
1 /****************************************************************************
2 ******* *******
3 ******* P A C K E T H E A D E R F I L E
4 ******* *******
5 ****************************************************************************
6
7 Author : Ian Nandhra / Jeremy Rolls
8 Date :
9
10 *
11 * (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26
27 Version : 0.01
28
29
30 Mods
31 ----------------------------------------------------------------------------
32 Date By Description
33 ----------------------------------------------------------------------------
34
35 ***************************************************************************/
36
37 #ifndef _pkt_h
38 #define _pkt_h 1
39
40
41 #ifdef SCCS_LABELS
42 #ifndef lint
43 /* static char *_rio_pkt_h_sccs = "@(#)pkt.h 1.8"; */
44 #endif
45 #endif
46
47 #define MAX_TTL 0xf
48 #define PKT_CMD_BIT ((ushort) 0x080)
49 #define PKT_CMD_DATA ((ushort) 0x080)
50
51 #define PKT_ACK ((ushort) 0x040)
52
53 #define PKT_TGL ((ushort) 0x020)
54
55 #define PKT_LEN_MASK ((ushort) 0x07f)
56
57 #define DATA_WNDW ((ushort) 0x10)
58 #define PKT_TTL_MASK ((ushort) 0x0f)
59
60 #define PKT_MAX_DATA_LEN 72
61
62 #define PKT_LENGTH sizeof(struct PKT)
63 #define SYNC_PKT_LENGTH (PKT_LENGTH + 4)
64
65 #define CONTROL_PKT_LEN_MASK PKT_LEN_MASK
66 #define CONTROL_PKT_CMD_BIT PKT_CMD_BIT
67 #define CONTROL_PKT_ACK (PKT_ACK << 8)
68 #define CONTROL_PKT_TGL (PKT_TGL << 8)
69 #define CONTROL_PKT_TTL_MASK (PKT_TTL_MASK << 8)
70 #define CONTROL_DATA_WNDW (DATA_WNDW << 8)
71
72 struct PKT {
73 #ifdef INKERNEL
74 BYTE dest_unit ; /* Destination Unit Id */
75 BYTE dest_port ; /* Destination POrt */
76 BYTE src_unit ; /* Source Unit Id */
77 BYTE src_port ; /* Source POrt */
78 #else
79 union
80 {
81 ushort destination; /* Complete destination */
82 struct
83 {
84 unsigned char unit; /* Destination unit */
85 unsigned char port; /* Destination port */
86 } s1;
87 } u1;
88 union
89 {
90 ushort source; /* Complete source */
91 struct
92 {
93 unsigned char unit; /* Source unit */
94 unsigned char port; /* Source port */
95 } s2;
96 } u2;
97 #endif
98 #ifdef INKERNEL
99 BYTE len ;
100 BYTE control;
101 #else
102 union
103 {
104 ushort control;
105 struct
106 {
107 unsigned char len;
108 unsigned char control;
109 } s3;
110 } u3;
111 #endif
112 BYTE data[PKT_MAX_DATA_LEN] ;
113 /* Actual data :-) */
114 WORD csum ; /* C-SUM */
115 } ;
116 #endif
117
118 /*********** end of file ***********/
119
120
121