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joy /
joy.c
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1.6:
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Thu May 13 23:49:16 2004 UTC (9 years ago) by
dillon
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device switch 1/many: Remove d_autoq, add d_clone (where d_autoq was).
d_autoq was used to allow the device port dispatch to mix old-style synchronous
calls with new style messaging calls within a particular device. It was never
used for that purpose.
d_clone will be more fully implemented as work continues. We are going to
install d_port in the dev_t (struct specinfo) structure itself and d_clone
will be needed to allow devices to 'revector' the port on a minor-number
by minor-number basis, in particular allowing minor numbers to be directly
dispatched to distinct threads. This is something we will be needing later
on.
1: /*-
2: * Copyright (c) 1995 Jean-Marc Zucconi
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer
10: * in this position and unchanged.
11: * 2. Redistributions in binary form must reproduce the above copyright
12: * notice, this list of conditions and the following disclaimer in the
13: * documentation and/or other materials provided with the distribution.
14: * 3. The name of the author may not be used to endorse or promote products
15: * derived from this software withough specific prior written permission
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27: *
28: * $FreeBSD: src/sys/isa/joy.c,v 1.38.2.1 2001/09/01 05:55:31 murray Exp $
29: * $DragonFly: src/sys/dev/misc/joy/joy.c,v 1.6 2004/05/13 23:49:16 dillon Exp $
30: */
31:
32: #include <sys/param.h>
33: #include <sys/systm.h>
34: #include <sys/conf.h>
35: #include <sys/uio.h>
36: #include <sys/kernel.h>
37: #include <sys/module.h>
38: #include <sys/bus.h>
39: #include <machine/bus.h>
40: #include <machine/resource.h>
41: #include <sys/rman.h>
42: #include <sys/time.h>
43: #include <sys/joystick.h>
44:
45: #include <bus/isa/isavar.h>
46: #include "isa_if.h"
47:
48: /* The game port can manage 4 buttons and 4 variable resistors (usually 2
49: * joysticks, each with 2 buttons and 2 pots.) via the port at address 0x201.
50: * Getting the state of the buttons is done by reading the game port:
51: * buttons 1-4 correspond to bits 4-7 and resistors 1-4 (X1, Y1, X2, Y2)
52: * to bits 0-3.
53: * if button 1 (resp 2, 3, 4) is pressed, the bit 4 (resp 5, 6, 7) is set to 0
54: * to get the value of a resistor, write the value 0xff at port and
55: * wait until the corresponding bit returns to 0.
56: */
57:
58: #define joypart(d) (minor(d)&1)
59: #define UNIT(d) ((minor(d)>>1)&3)
60: #ifndef JOY_TIMEOUT
61: #define JOY_TIMEOUT 2000 /* 2 milliseconds */
62: #endif
63:
64: struct joy_softc {
65: bus_space_tag_t bt;
66: bus_space_handle_t port;
67: int x_off[2], y_off[2];
68: int timeout[2];
69: };
70:
71: #define JOY_SOFTC(unit) (struct joy_softc *) \
72: devclass_get_softc(joy_devclass,(unit))
73:
74: static int joy_probe (device_t);
75: static int joy_attach (device_t);
76:
77: #define CDEV_MAJOR 51
78: static d_open_t joyopen;
79: static d_close_t joyclose;
80: static d_read_t joyread;
81: static d_ioctl_t joyioctl;
82:
83: static struct cdevsw joy_cdevsw = {
84: /* name */ "joy",
85: /* maj */ CDEV_MAJOR,
86: /* flags */ 0,
87: /* port */ NULL,
88: /* clone */ NULL,
89:
90: /* open */ joyopen,
91: /* close */ joyclose,
92: /* read */ joyread,
93: /* write */ nowrite,
94: /* ioctl */ joyioctl,
95: /* poll */ nopoll,
96: /* mmap */ nommap,
97: /* strategy */ nostrategy,
98: /* dump */ nodump,
99: /* psize */ nopsize
100: };
101:
102: devclass_t joy_devclass;
103:
104: static struct isa_pnp_id joy_ids[] = {
105: {0x0100630e, "CSC0001 PnP Joystick"}, /* CSC0001 */
106: {0x0101630e, "CSC0101 PnP Joystick"}, /* CSC0101 */
107: {0x01100002, "ALS0110 PnP Joystick"}, /* @P@1001 */
108: {0x01200002, "ALS0120 PnP Joystick"}, /* @P@2001 */
109: {0x01007316, "ESS0001 PnP Joystick"}, /* ESS0001 */
110: {0x2fb0d041, "Generic PnP Joystick"}, /* PNPb02f */
111: {0x2200a865, "YMH0022 PnP Joystick"}, /* YMH0022 */
112: {0x82719304, NULL}, /* ADS7182 */
113: {0}
114: };
115:
116: static int
117: joy_probe (device_t dev)
118: {
119: if (ISA_PNP_PROBE(device_get_parent(dev), dev, joy_ids) == ENXIO)
120: return ENXIO;
121: #ifdef WANT_JOYSTICK_CONNECTED
122: #ifdef notyet
123: outb (dev->id_iobase, 0xff);
124: DELAY (10000); /* 10 ms delay */
125: return (inb (dev->id_iobase) & 0x0f) != 0x0f;
126: #endif
127: #else
128: return 0;
129: #endif
130: }
131:
132: static int
133: joy_attach (device_t dev)
134: {
135: int unit = device_get_unit(dev);
136: int rid = 0;
137: struct resource *res;
138: struct joy_softc *joy = device_get_softc(dev);
139:
140: res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, RF_ACTIVE);
141: if (res == NULL)
142: return ENXIO;
143: joy->bt = rman_get_bustag(res);
144: joy->port = rman_get_bushandle(res);
145: joy->timeout[0] = joy->timeout[1] = 0;
146: make_dev(&joy_cdevsw, 0, 0, 0, 0600, "joy%d", unit);
147: return 0;
148: }
149:
150: static device_method_t joy_methods[] = {
151: DEVMETHOD(device_probe, joy_probe),
152: DEVMETHOD(device_attach, joy_attach),
153: { 0, 0 }
154: };
155:
156: static driver_t joy_isa_driver = {
157: "joy",
158: joy_methods,
159: sizeof (struct joy_softc)
160: };
161:
162: DRIVER_MODULE(joy, isa, joy_isa_driver, joy_devclass, 0, 0);
163:
164: static int
165: joyopen(dev_t dev, int flags, int fmt, d_thread_t *td)
166: {
167: int i = joypart (dev);
168: struct joy_softc *joy = JOY_SOFTC(UNIT(dev));
169:
170: if (joy->timeout[i])
171: return EBUSY;
172: joy->x_off[i] = joy->y_off[i] = 0;
173: joy->timeout[i] = JOY_TIMEOUT;
174: return 0;
175: }
176:
177: static int
178: joyclose(dev_t dev, int flags, int fmt, d_thread_t *td)
179: {
180: int i = joypart (dev);
181: struct joy_softc *joy = JOY_SOFTC(UNIT(dev));
182:
183: joy->timeout[i] = 0;
184: return 0;
185: }
186:
187: static int
188: joyread(dev_t dev, struct uio *uio, int flag)
189: {
190: struct joy_softc *joy = JOY_SOFTC(UNIT(dev));
191: bus_space_handle_t port = joy->port;
192: bus_space_tag_t bt = joy->bt;
193: struct timespec t, start, end;
194: int state = 0;
195: struct timespec x, y;
196: struct joystick c;
197: #ifndef i386
198: int s;
199:
200: s = splhigh();
201: #else
202: disable_intr ();
203: #endif
204: bus_space_write_1 (bt, port, 0, 0xff);
205: nanotime(&start);
206: end.tv_sec = 0;
207: end.tv_nsec = joy->timeout[joypart(dev)] * 1000;
208: timespecadd(&end, &start);
209: t = start;
210: timespecclear(&x);
211: timespecclear(&y);
212: while (timespeccmp(&t, &end, <)) {
213: state = bus_space_read_1 (bt, port, 0);
214: if (joypart(dev) == 1)
215: state >>= 2;
216: nanotime(&t);
217: if (!timespecisset(&x) && !(state & 0x01))
218: x = t;
219: if (!timespecisset(&y) && !(state & 0x02))
220: y = t;
221: if (timespecisset(&x) && timespecisset(&y))
222: break;
223: }
224: #ifndef i386
225: splx(s);
226: #else
227: enable_intr ();
228: #endif
229: if (timespecisset(&x)) {
230: timespecsub(&x, &start);
231: c.x = joy->x_off[joypart(dev)] + x.tv_nsec / 1000;
232: } else
233: c.x = 0x80000000;
234: if (timespecisset(&y)) {
235: timespecsub(&y, &start);
236: c.y = joy->y_off[joypart(dev)] + y.tv_nsec / 1000;
237: } else
238: c.y = 0x80000000;
239: state >>= 4;
240: c.b1 = ~state & 1;
241: c.b2 = ~(state >> 1) & 1;
242: return uiomove ((caddr_t)&c, sizeof(struct joystick), uio);
243: }
244:
245: static int
246: joyioctl(dev_t dev, u_long cmd, caddr_t data, int flag, d_thread_t *td)
247: {
248: struct joy_softc *joy = JOY_SOFTC(UNIT(dev));
249: int i = joypart (dev);
250: int x;
251:
252: switch (cmd) {
253: case JOY_SETTIMEOUT:
254: x = *(int *) data;
255: if (x < 1 || x > 10000) /* 10ms maximum! */
256: return EINVAL;
257: joy->timeout[i] = x;
258: break;
259: case JOY_GETTIMEOUT:
260: *(int *) data = joy->timeout[i];
261: break;
262: case JOY_SET_X_OFFSET:
263: joy->x_off[i] = *(int *) data;
264: break;
265: case JOY_SET_Y_OFFSET:
266: joy->y_off[i] = *(int *) data;
267: break;
268: case JOY_GET_X_OFFSET:
269: *(int *) data = joy->x_off[i];
270: break;
271: case JOY_GET_Y_OFFSET:
272: *(int *) data = joy->y_off[i];
273: break;
274: default:
275: return ENXIO;
276: }
277: return 0;
278: }
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