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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 *);