FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/joy.c
1 /* $NetBSD: joy.c,v 1.8 2004/08/03 18:35:21 drochner Exp $ */
2
3 /*-
4 * Copyright (c) 1995 Jean-Marc Zucconi
5 * All rights reserved.
6 *
7 * Ported to NetBSD by Matthieu Herrb <matthieu@laas.fr>
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer
14 * in this position and unchanged.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 */
33
34 #include <sys/cdefs.h>
35 __KERNEL_RCSID(0, "$NetBSD: joy.c,v 1.8 2004/08/03 18:35:21 drochner Exp $");
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/device.h>
41 #include <sys/errno.h>
42 #include <sys/conf.h>
43 #include <sys/event.h>
44 #include <sys/vnode.h>
45 #include <machine/bus.h>
46
47 #include <sys/joystick.h>
48 #include <dev/ic/joyvar.h>
49
50 /*
51 * The game port can manage 4 buttons and 4 variable resistors (usually 2
52 * joysticks, each with 2 buttons and 2 pots.) via the port at address 0x201.
53 * Getting the state of the buttons is done by reading the game port;
54 * buttons 1-4 correspond to bits 4-7 and resistors 1-4 (X1, Y1, X2, Y2)
55 * to bits 0-3. If button 1 (resp 2, 3, 4) is pressed, the bit 4 (resp 5,
56 * 6, 7) is set to 0 to get the value of a resistor, write the value 0xff
57 * at port and wait until the corresponding bit returns to 0.
58 */
59
60
61 #define JOYPART(d) (minor(d) & 1)
62 #define JOYUNIT(d) (minor(d) >> 1)
63
64 #ifndef JOY_TIMEOUT
65 #define JOY_TIMEOUT 2000 /* 2 milliseconds */
66 #endif
67
68 extern struct cfdriver joy_cd;
69
70 dev_type_open(joyopen);
71 dev_type_close(joyclose);
72 dev_type_read(joyread);
73 dev_type_ioctl(joyioctl);
74
75 const struct cdevsw joy_cdevsw = {
76 joyopen, joyclose, joyread, nowrite, joyioctl,
77 nostop, notty, nopoll, nommap, nokqfilter,
78 };
79
80 void
81 joyattach(sc)
82 struct joy_softc *sc;
83 {
84
85 sc->timeout[0] = sc->timeout[1] = 0;
86 bus_space_write_1(sc->sc_iot, sc->sc_ioh, 0, 0xff);
87 DELAY(10000); /* 10 ms delay */
88 printf("%s: joystick %sconnected\n", sc->sc_dev.dv_xname,
89 (bus_space_read_1(sc->sc_iot, sc->sc_ioh, 0) & 0x0f) == 0x0f ?
90 "not " : "");
91 }
92
93 int
94 joydetach(sc, flags)
95 struct joy_softc *sc;
96 int flags;
97 {
98 int maj, mn;
99
100 maj = cdevsw_lookup_major(&joy_cdevsw);
101 mn = sc->sc_dev.dv_unit << 1;
102 vdevgone(maj, mn, mn, VCHR);
103 vdevgone(maj, mn + 1, mn + 1, VCHR);
104
105 return (0);
106 }
107
108 int
109 joyopen(dev, flag, mode, p)
110 dev_t dev;
111 int flag, mode;
112 struct proc *p;
113 {
114 int unit = JOYUNIT(dev);
115 int i = JOYPART(dev);
116 struct joy_softc *sc;
117
118 if (unit >= joy_cd.cd_ndevs)
119 return (ENXIO);
120 sc = joy_cd.cd_devs[unit];
121 if (sc == 0)
122 return (ENXIO);
123
124 if (sc->timeout[i])
125 return (EBUSY);
126
127 sc->x_off[i] = sc->y_off[i] = 0;
128 sc->timeout[i] = JOY_TIMEOUT;
129 return (0);
130 }
131
132 int
133 joyclose(dev, flag, mode, p)
134 dev_t dev;
135 int flag, mode;
136 struct proc *p;
137 {
138 int unit = JOYUNIT(dev);
139 int i = JOYPART(dev);
140 struct joy_softc *sc = joy_cd.cd_devs[unit];
141
142 sc->timeout[i] = 0;
143 return (0);
144 }
145
146 int
147 joyread(dev, uio, flag)
148 dev_t dev;
149 struct uio *uio;
150 int flag;
151 {
152 int unit = JOYUNIT(dev);
153 struct joy_softc *sc = joy_cd.cd_devs[unit];
154 bus_space_tag_t iot = sc->sc_iot;
155 bus_space_handle_t ioh = sc->sc_ioh;
156 struct joystick c;
157 int i, s;
158 struct timeval start, now, diff;
159 int state = 0, x = 0, y = 0;
160
161 s = splhigh(); /* XXX */
162 bus_space_write_1(iot, ioh, 0, 0xff);
163 microtime(&start);
164 now = start; /* structure assignment */
165 i = sc->timeout[JOYPART(dev)];
166 for (;;) {
167 timersub(&now, &start, &diff);
168 if (diff.tv_sec > 0 || diff.tv_usec > i)
169 break;
170 state = bus_space_read_1(iot, ioh, 0);
171 if (JOYPART(dev) == 1)
172 state >>= 2;
173 if (!x && !(state & 0x01))
174 x = diff.tv_usec;
175 if (!y && !(state & 0x02))
176 y = diff.tv_usec;
177 if (x && y)
178 break;
179 microtime(&now);
180 }
181 splx(s); /* XXX */
182
183 c.x = x ? sc->x_off[JOYPART(dev)] + x : 0x80000000;
184 c.y = y ? sc->y_off[JOYPART(dev)] + y : 0x80000000;
185 state >>= 4;
186 c.b1 = ~state & 1;
187 c.b2 = ~(state >> 1) & 1;
188 return (uiomove(&c, sizeof(struct joystick), uio));
189 }
190
191 int
192 joyioctl(dev, cmd, data, flag, p)
193 dev_t dev;
194 u_long cmd;
195 caddr_t data;
196 int flag;
197 struct proc *p;
198 {
199 int unit = JOYUNIT(dev);
200 struct joy_softc *sc = joy_cd.cd_devs[unit];
201 int i = JOYPART(dev);
202 int x;
203
204 switch (cmd) {
205 case JOY_SETTIMEOUT:
206 x = *(int *) data;
207 if (x < 1 || x > 10000) /* 10ms maximum! */
208 return (EINVAL);
209 sc->timeout[i] = x;
210 break;
211 case JOY_GETTIMEOUT:
212 *(int *) data = sc->timeout[i];
213 break;
214 case JOY_SET_X_OFFSET:
215 sc->x_off[i] = *(int *) data;
216 break;
217 case JOY_SET_Y_OFFSET:
218 sc->y_off[i] = *(int *) data;
219 break;
220 case JOY_GET_X_OFFSET:
221 *(int *) data = sc->x_off[i];
222 break;
223 case JOY_GET_Y_OFFSET:
224 *(int *) data = sc->y_off[i];
225 break;
226 default:
227 return (ENXIO);
228 }
229 return 0;
230 }
Cache object: e93102c11c98564d1b5f461d34fd8d68
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