| 1 | /* $NetBSD: joy.c,v 1.20 2014/07/25 08:10:37 dholland Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2008 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software developed for The NetBSD Foundation |
| 8 | * by Andrew Doran. |
| 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 | * 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 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | /*- |
| 33 | * Copyright (c) 1995 Jean-Marc Zucconi |
| 34 | * All rights reserved. |
| 35 | * |
| 36 | * Ported to NetBSD by Matthieu Herrb <matthieu@laas.fr> |
| 37 | * |
| 38 | * Redistribution and use in source and binary forms, with or without |
| 39 | * modification, are permitted provided that the following conditions |
| 40 | * are met: |
| 41 | * 1. Redistributions of source code must retain the above copyright |
| 42 | * notice, this list of conditions and the following disclaimer |
| 43 | * in this position and unchanged. |
| 44 | * 2. Redistributions in binary form must reproduce the above copyright |
| 45 | * notice, this list of conditions and the following disclaimer in the |
| 46 | * documentation and/or other materials provided with the distribution. |
| 47 | * 3. The name of the author may not be used to endorse or promote products |
| 48 | * derived from this software without specific prior written permission |
| 49 | * |
| 50 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 51 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 52 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 53 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 54 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 55 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 56 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 57 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 58 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 59 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 60 | * |
| 61 | */ |
| 62 | |
| 63 | #include <sys/cdefs.h> |
| 64 | __KERNEL_RCSID(0, "$NetBSD: joy.c,v 1.20 2014/07/25 08:10:37 dholland Exp $" ); |
| 65 | |
| 66 | #include <sys/param.h> |
| 67 | #include <sys/systm.h> |
| 68 | #include <sys/kernel.h> |
| 69 | #include <sys/device.h> |
| 70 | #include <sys/errno.h> |
| 71 | #include <sys/conf.h> |
| 72 | #include <sys/event.h> |
| 73 | #include <sys/vnode.h> |
| 74 | #include <sys/bus.h> |
| 75 | #include <sys/joystick.h> |
| 76 | |
| 77 | #include <dev/ic/joyvar.h> |
| 78 | |
| 79 | /* |
| 80 | * The game port can manage 4 buttons and 4 variable resistors (usually 2 |
| 81 | * joysticks, each with 2 buttons and 2 pots.) via the port at address 0x201. |
| 82 | * Getting the state of the buttons is done by reading the game port; |
| 83 | * buttons 1-4 correspond to bits 4-7 and resistors 1-4 (X1, Y1, X2, Y2) |
| 84 | * to bits 0-3. If button 1 (resp 2, 3, 4) is pressed, the bit 4 (resp 5, |
| 85 | * 6, 7) is set to 0 to get the value of a resistor, write the value 0xff |
| 86 | * at port and wait until the corresponding bit returns to 0. |
| 87 | */ |
| 88 | |
| 89 | |
| 90 | #define JOYPART(d) (minor(d) & 1) |
| 91 | #define JOYUNIT(d) (minor(d) >> 1) |
| 92 | |
| 93 | #ifndef JOY_TIMEOUT |
| 94 | #define JOY_TIMEOUT 2000 /* 2 milliseconds */ |
| 95 | #endif |
| 96 | |
| 97 | extern struct cfdriver joy_cd; |
| 98 | |
| 99 | static dev_type_open(joyopen); |
| 100 | static dev_type_close(joyclose); |
| 101 | static dev_type_read(joyread); |
| 102 | static dev_type_ioctl(joyioctl); |
| 103 | |
| 104 | const struct cdevsw joy_cdevsw = { |
| 105 | .d_open = joyopen, |
| 106 | .d_close = joyclose, |
| 107 | .d_read = joyread, |
| 108 | .d_write = nowrite, |
| 109 | .d_ioctl = joyioctl, |
| 110 | .d_stop = nostop, |
| 111 | .d_tty = notty, |
| 112 | .d_poll = nopoll, |
| 113 | .d_mmap = nommap, |
| 114 | .d_kqfilter = nokqfilter, |
| 115 | .d_discard = nodiscard, |
| 116 | .d_flag = D_OTHER | D_MPSAFE |
| 117 | }; |
| 118 | |
| 119 | void |
| 120 | joyattach(struct joy_softc *sc) |
| 121 | { |
| 122 | |
| 123 | if (sc->sc_lock == NULL) { |
| 124 | panic("joyattach: no lock" ); |
| 125 | } |
| 126 | |
| 127 | sc->timeout[0] = 0; |
| 128 | sc->timeout[1] = 0; |
| 129 | |
| 130 | mutex_enter(sc->sc_lock); |
| 131 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, 0, 0xff); |
| 132 | DELAY(10000); /* 10 ms delay */ |
| 133 | aprint_normal_dev(sc->sc_dev, "joystick %sconnected\n" , |
| 134 | (bus_space_read_1(sc->sc_iot, sc->sc_ioh, 0) & 0x0f) == 0x0f ? |
| 135 | "not " : "" ); |
| 136 | mutex_exit(sc->sc_lock); |
| 137 | } |
| 138 | |
| 139 | int |
| 140 | joydetach(struct joy_softc *sc, int flags) |
| 141 | { |
| 142 | int maj, mn; |
| 143 | |
| 144 | maj = cdevsw_lookup_major(&joy_cdevsw); |
| 145 | mn = device_unit(sc->sc_dev) << 1; |
| 146 | vdevgone(maj, mn, mn, VCHR); |
| 147 | vdevgone(maj, mn + 1, mn + 1, VCHR); |
| 148 | |
| 149 | return 0; |
| 150 | } |
| 151 | |
| 152 | static int |
| 153 | joyopen(dev_t dev, int flag, int mode, struct lwp *l) |
| 154 | { |
| 155 | int unit = JOYUNIT(dev); |
| 156 | int i = JOYPART(dev); |
| 157 | struct joy_softc *sc; |
| 158 | |
| 159 | sc = device_lookup_private(&joy_cd, unit); |
| 160 | if (sc == NULL) |
| 161 | return ENXIO; |
| 162 | |
| 163 | mutex_enter(sc->sc_lock); |
| 164 | if (sc->timeout[i]) { |
| 165 | mutex_exit(sc->sc_lock); |
| 166 | return EBUSY; |
| 167 | } |
| 168 | sc->x_off[i] = sc->y_off[i] = 0; |
| 169 | sc->timeout[i] = JOY_TIMEOUT; |
| 170 | mutex_exit(sc->sc_lock); |
| 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | static int |
| 175 | joyclose(dev_t dev, int flag, int mode, struct lwp *l) |
| 176 | { |
| 177 | int unit = JOYUNIT(dev); |
| 178 | int i = JOYPART(dev); |
| 179 | struct joy_softc *sc = device_lookup_private(&joy_cd, unit); |
| 180 | |
| 181 | mutex_enter(sc->sc_lock); |
| 182 | sc->timeout[i] = 0; |
| 183 | mutex_exit(sc->sc_lock); |
| 184 | return 0; |
| 185 | } |
| 186 | |
| 187 | static int |
| 188 | joyread(dev_t dev, struct uio *uio, int flag) |
| 189 | { |
| 190 | int unit = JOYUNIT(dev); |
| 191 | struct joy_softc *sc = device_lookup_private(&joy_cd, unit); |
| 192 | bus_space_tag_t iot = sc->sc_iot; |
| 193 | bus_space_handle_t ioh = sc->sc_ioh; |
| 194 | struct joystick c; |
| 195 | struct timeval start, now, diff; |
| 196 | int state = 0, x = 0, y = 0, i; |
| 197 | |
| 198 | mutex_enter(sc->sc_lock); |
| 199 | bus_space_write_1(iot, ioh, 0, 0xff); |
| 200 | microtime(&start); |
| 201 | now = start; /* structure assignment */ |
| 202 | i = sc->timeout[JOYPART(dev)]; |
| 203 | for (;;) { |
| 204 | timersub(&now, &start, &diff); |
| 205 | if (diff.tv_sec > 0 || diff.tv_usec > i) |
| 206 | break; |
| 207 | state = bus_space_read_1(iot, ioh, 0); |
| 208 | if (JOYPART(dev) == 1) |
| 209 | state >>= 2; |
| 210 | if (!x && !(state & 0x01)) |
| 211 | x = diff.tv_usec; |
| 212 | if (!y && !(state & 0x02)) |
| 213 | y = diff.tv_usec; |
| 214 | if (x && y) |
| 215 | break; |
| 216 | microtime(&now); |
| 217 | } |
| 218 | mutex_exit(sc->sc_lock); |
| 219 | |
| 220 | c.x = x ? sc->x_off[JOYPART(dev)] + x : 0x80000000; |
| 221 | c.y = y ? sc->y_off[JOYPART(dev)] + y : 0x80000000; |
| 222 | state >>= 4; |
| 223 | c.b1 = ~state & 1; |
| 224 | c.b2 = ~(state >> 1) & 1; |
| 225 | return uiomove(&c, sizeof(struct joystick), uio); |
| 226 | } |
| 227 | |
| 228 | static int |
| 229 | joyioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) |
| 230 | { |
| 231 | int unit = JOYUNIT(dev); |
| 232 | struct joy_softc *sc = device_lookup_private(&joy_cd, unit); |
| 233 | int i = JOYPART(dev), x, error; |
| 234 | |
| 235 | mutex_enter(sc->sc_lock); |
| 236 | error = 0; |
| 237 | switch (cmd) { |
| 238 | case JOY_SETTIMEOUT: |
| 239 | x = *(int *)data; |
| 240 | if (x < 1 || x > 10000) { /* 10ms maximum! */ |
| 241 | error = EINVAL; |
| 242 | break; |
| 243 | } |
| 244 | sc->timeout[i] = x; |
| 245 | break; |
| 246 | case JOY_GETTIMEOUT: |
| 247 | *(int *)data = sc->timeout[i]; |
| 248 | break; |
| 249 | case JOY_SET_X_OFFSET: |
| 250 | sc->x_off[i] = *(int *)data; |
| 251 | break; |
| 252 | case JOY_SET_Y_OFFSET: |
| 253 | sc->y_off[i] = *(int *)data; |
| 254 | break; |
| 255 | case JOY_GET_X_OFFSET: |
| 256 | *(int *)data = sc->x_off[i]; |
| 257 | break; |
| 258 | case JOY_GET_Y_OFFSET: |
| 259 | *(int *)data = sc->y_off[i]; |
| 260 | break; |
| 261 | default: |
| 262 | error = ENXIO; |
| 263 | break; |
| 264 | } |
| 265 | mutex_exit(sc->sc_lock); |
| 266 | return error; |
| 267 | } |
| 268 | |