Annotation of sys/arch/i386/isa/joyreg.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: joyreg.h,v 1.4 2002/06/02 22:49:59 deraadt Exp $ */
2: /* $NetBSD: joy.c,v 1.3 1996/05/05 19:46:15 christos Exp $ */
3:
4: /*-
5: * Copyright (c) 1995 Jean-Marc Zucconi
6: * All rights reserved.
7: *
8: * Ported to NetBSD by Matthieu Herrb <matthieu@laas.fr>
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer
15: * in this position and unchanged.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. The name of the author may not be used to endorse or promote products
20: * derived from this software without specific prior written permission
21: *
22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32: *
33: */
34:
35: /*
36: * The game port can manage 4 buttons and 4 variable resistors (usually 2
37: * joysticks, each with 2 buttons and 2 pots.) via the port at address 0x201.
38: * Getting the state of the buttons is done by reading the game port;
39: * buttons 1-4 correspond to bits 4-7 and resistors 1-4 (X1, Y1, X2, Y2)
40: * to bits 0-3. If button 1 (resp 2, 3, 4) is pressed, the bit 4 (resp 5,
41: * 6, 7) is set to 0 to get the value of a resistor, write the value 0xff
42: * at port and wait until the corresponding bit returns to 0.
43: */
44:
45: /*
46: * The formulae below only work if u is ``not too large''. See also
47: * the discussion in microtime.s
48: */
49: #define USEC2TICKS(u) (((u) * 19549) >> 14)
50: #define TICKS2USEC(u) (((u) * 3433) >> 12)
51:
52:
53: #define JOYPART(d) (minor(d) & 1)
54: #define JOYUNIT(d) minor(d) >> 1 & 3
55:
56: #ifndef JOY_TIMEOUT
57: #define JOY_TIMEOUT 2000 /* 2 milliseconds */
58: #endif
59:
60: #define JOY_NPORTS 1
61:
62: struct joy_softc {
63: struct device sc_dev;
64: int port;
65: int x_off[2], y_off[2];
66: int timeout[2];
67: };
68:
69: int joyopen(dev_t, int, int, struct proc *);
70: int joyclose(dev_t, int, int, struct proc *);
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