Annotation of sys/arch/i386/isa/joy.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: joy.c,v 1.13 2007/08/01 13:18:18 martin 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: #include <sys/param.h>
36: #include <sys/systm.h>
37: #include <sys/kernel.h>
38: #include <sys/device.h>
39: #include <sys/errno.h>
40:
41: #include <machine/cpu.h>
42: #include <machine/pio.h>
43: #include <machine/cpufunc.h>
44: #include <machine/joystick.h>
45: #include <machine/conf.h>
46:
47: #include <dev/isa/isavar.h>
48: #include <dev/isa/isareg.h>
49: #include <dev/ic/i8253reg.h>
50: #include <i386/isa/joyreg.h>
51:
52: static int joy_get_tick(void);
53:
54: struct cfdriver joy_cd = {
55: NULL, "joy", DV_DULL
56: };
57:
58: int
59: joyopen(dev_t dev, int flag, int mode, struct proc *p)
60: {
61: int unit = JOYUNIT(dev);
62: int i = JOYPART(dev);
63: struct joy_softc *sc;
64:
65: if (unit >= joy_cd.cd_ndevs)
66: return (ENXIO);
67:
68: sc = joy_cd.cd_devs[unit];
69: if (sc == NULL)
70: return (ENXIO);
71:
72: if (sc->timeout[i])
73: return EBUSY;
74:
75: sc->x_off[i] = sc->y_off[i] = 0;
76: sc->timeout[i] = JOY_TIMEOUT;
77: return 0;
78: }
79:
80: int
81: joyclose(dev_t dev, int flag, int mode, struct proc *p)
82: {
83: int unit = JOYUNIT(dev);
84: int i = JOYPART(dev);
85: struct joy_softc *sc = joy_cd.cd_devs[unit];
86:
87: sc->timeout[i] = 0;
88: return 0;
89: }
90:
91: int
92: joyread(dev_t dev, struct uio *uio, int flag)
93: {
94: int unit = JOYUNIT(dev);
95: struct joy_softc *sc = joy_cd.cd_devs[unit];
96: struct joystick c;
97: int port = sc->port;
98: int i, t0, t1;
99: int state = 0, x = 0, y = 0;
100:
101: disable_intr();
102: outb(port, 0xff);
103: t0 = joy_get_tick();
104: t1 = t0;
105: i = USEC2TICKS(sc->timeout[JOYPART(dev)]);
106: while (t0 - t1 < i) {
107: state = inb(port);
108: if (JOYPART(dev) == 1)
109: state >>= 2;
110: t1 = joy_get_tick();
111: if (t1 > t0)
112: t1 -= TIMER_FREQ / hz;
113: if (!x && !(state & 0x01))
114: x = t1;
115: if (!y && !(state & 0x02))
116: y = t1;
117: if (x && y)
118: break;
119: }
120: enable_intr();
121: c.x = x ? sc->x_off[JOYPART(dev)] + TICKS2USEC(t0 - x) : 0x80000000;
122: c.y = y ? sc->y_off[JOYPART(dev)] + TICKS2USEC(t0 - y) : 0x80000000;
123: state >>= 4;
124: c.b1 = ~state & 1;
125: c.b2 = ~(state >> 1) & 1;
126: return uiomove((caddr_t) & c, sizeof(struct joystick), uio);
127: }
128:
129: int
130: joyioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
131: {
132: int unit = JOYUNIT(dev);
133: struct joy_softc *sc = joy_cd.cd_devs[unit];
134: int i = JOYPART(dev);
135: int x;
136:
137: switch (cmd) {
138: case JOY_SETTIMEOUT:
139: x = *(int *) data;
140: if (x < 1 || x > 10000) /* 10ms maximum! */
141: return EINVAL;
142: sc->timeout[i] = x;
143: break;
144: case JOY_GETTIMEOUT:
145: *(int *) data = sc->timeout[i];
146: break;
147: case JOY_SET_X_OFFSET:
148: sc->x_off[i] = *(int *) data;
149: break;
150: case JOY_SET_Y_OFFSET:
151: sc->y_off[i] = *(int *) data;
152: break;
153: case JOY_GET_X_OFFSET:
154: *(int *) data = sc->x_off[i];
155: break;
156: case JOY_GET_Y_OFFSET:
157: *(int *) data = sc->y_off[i];
158: break;
159: default:
160: return ENXIO;
161: }
162: return 0;
163: }
164:
165: static int
166: joy_get_tick(void)
167: {
168: int low, high;
169:
170: outb(IO_TIMER1 + TIMER_MODE, TIMER_SEL0);
171: low = inb(IO_TIMER1 + TIMER_CNTR0);
172: high = inb(IO_TIMER1 + TIMER_CNTR0);
173:
174: return (high << 8) | low;
175: }
CVSweb
![[BACK]](/icons/back.gif){kind=icon}
Return to joy.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / sys / arch / i386 / isa