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 *);