1 /* $NetBSD: ms.c,v 1.15 1998/01/12 10:40:04 thorpej Exp $ */ 2 3 /* 4 * based on: 5 * 6 * Copyright (c) 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * This software was developed by the Computer Systems Engineering group 10 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 11 * contributed to Berkeley. 12 * 13 * All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Lawrence Berkeley Laboratory. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions 20 * are met: 21 * 1. Redistributions of source code must retain the above copyright 22 * notice, this list of conditions and the following disclaimer. 23 * 2. Redistributions in binary form must reproduce the above copyright 24 * notice, this list of conditions and the following disclaimer in the 25 * documentation and/or other materials provided with the distribution. 26 * 3. All advertising materials mentioning features or use of this software 27 * must display the following acknowledgement: 28 * This product includes software developed by the University of 29 * California, Berkeley and its contributors. 30 * 4. Neither the name of the University nor the names of its contributors 31 * may be used to endorse or promote products derived from this software 32 * without specific prior written permission. 33 * 34 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 35 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 36 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 37 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 38 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 39 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 40 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 41 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 42 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 43 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 44 * SUCH DAMAGE. 45 * 46 * @(#)ms.c 8.1 (Berkeley) 6/11/93 47 * 48 * Header: ms.c,v 1.5 92/11/26 01:28:47 torek Exp (LBL) 49 */ 50 51 /* 52 * Mouse driver. 53 */ 54 55 #include <sys/param.h> 56 #include <sys/device.h> 57 #include <sys/ioctl.h> 58 #include <sys/kernel.h> 59 #include <sys/proc.h> 60 #include <sys/syslog.h> 61 #include <sys/systm.h> 62 #include <sys/tty.h> 63 #include <sys/signalvar.h> 64 65 #include <amiga/dev/event_var.h> 66 #include <amiga/dev/vuid_event.h> 67 68 #include <amiga/amiga/custom.h> 69 #include <amiga/amiga/cia.h> 70 #include <amiga/amiga/device.h> 71 72 #include <sys/conf.h> 73 #include <machine/conf.h> 74 75 void msattach __P((struct device *, struct device *, void *)); 76 int msmatch __P((struct device *, struct cfdata *, void *)); 77 78 void msintr __P((void *)); 79 void ms_enable __P((dev_t)); 80 void ms_disable __P((dev_t)); 81 82 struct ms_softc { 83 struct device sc_dev; 84 85 u_char ms_horc; /* horizontal counter on last scan */ 86 u_char ms_verc; /* vertical counter on last scan */ 87 char ms_mb; /* mouse button state */ 88 char ms_ub; /* user button state */ 89 int ms_dx; /* delta-x */ 90 int ms_dy; /* delta-y */ 91 volatile int ms_ready; /* event queue is ready */ 92 struct evvar ms_events; /* event queue state */ 93 }; 94 95 struct cfattach ms_ca = { 96 sizeof(struct ms_softc), msmatch, msattach 97 }; 98 99 extern struct cfdriver ms_cd; 100 101 int 102 msmatch(pdp, cfp, auxp) 103 struct device *pdp; 104 struct cfdata *cfp; 105 void *auxp; 106 { 107 108 if (matchname((char *)auxp, "ms") && 109 cfp->cf_unit >= 0 && cfp->cf_unit <= 1) /* only two units */ 110 return 1; 111 112 return 0; 113 } 114 115 void 116 msattach(pdp, dp, auxp) 117 struct device *pdp, *dp; 118 void *auxp; 119 { 120 printf("\n"); 121 } 122 123 /* 124 * Amiga mice are hooked up to one of the two "game" ports, where 125 * the main mouse is usually on the first port, and port 2 can 126 * be used by a joystick. Nevertheless, we support two mouse 127 * devices, /dev/mouse0 and /dev/mouse1 (with a link of /dev/mouse to 128 * the device that represents the port of the mouse in use). 129 */ 130 131 /* 132 * enable scanner, called when someone opens the device. 133 * Assume caller already validated range of dev. 134 */ 135 void 136 ms_enable(dev) 137 dev_t dev; 138 { 139 struct ms_softc *ms; 140 141 ms = (struct ms_softc *)getsoftc(ms_cd, minor(dev)); 142 143 /* 144 * use this as flag to the "interrupt" to tell it when to 145 * shut off (when it's reset to 0). 146 */ 147 ms->ms_ready = 1; 148 149 timeout(msintr, (void *)minor(dev), 2); 150 } 151 152 /* 153 * disable scanner. Just set ms_ready to 0, and after the next 154 * timeout taken, no further timeouts will be initiated. 155 */ 156 void 157 ms_disable(dev) 158 dev_t dev; 159 { 160 struct ms_softc *ms; 161 int s; 162 163 ms = (struct ms_softc *)getsoftc(ms_cd, minor(dev)); 164 s = splhigh (); 165 ms->ms_ready = 0; 166 /* 167 * sync with the interrupt 168 */ 169 tsleep(ms, PZERO - 1, "mouse-disable", 0); 170 splx(s); 171 } 172 173 174 /* 175 * we're emulating a mousesystems serial mouse here.. 176 */ 177 void 178 msintr(arg) 179 void *arg; 180 { 181 static const char to_one[] = { 1, 2, 2, 4, 4, 4, 4 }; 182 static const int to_id[] = { MS_RIGHT, MS_MIDDLE, 0, MS_LEFT }; 183 struct ms_softc *ms; 184 struct firm_event *fe; 185 int mb, ub, d, get, put, any, unit; 186 u_char pra, *horc, *verc; 187 u_short pot, count; 188 short dx, dy; 189 190 unit = (int)arg; 191 ms = (struct ms_softc *)getsoftc(ms_cd, unit); 192 193 horc = ((u_char *) &count) + 1; 194 verc = (u_char *) &count; 195 196 /* 197 * first read the three buttons. 198 */ 199 pot = custom.potgor; 200 pra = ciaa.pra; 201 pot >>= unit == 0 ? 8 : 12; /* contains right and middle button */ 202 pra >>= unit == 0 ? 6 : 7; /* contains left button */ 203 mb = (pot & 4) / 4 + (pot & 1) * 2 + (pra & 1) * 4; 204 mb ^= 0x07; 205 206 /* 207 * read current values of counter registers 208 */ 209 if (unit == 0) 210 count = custom.joy0dat; 211 else 212 count = custom.joy1dat; 213 214 /* 215 * take care of wraparound 216 */ 217 dx = *horc - ms->ms_horc; 218 if (dx < -127) 219 dx += 255; 220 else if (dx > 127) 221 dx -= 255; 222 dy = *verc - ms->ms_verc; 223 if (dy < -127) 224 dy += 255; 225 else if (dy > 127) 226 dy -= 255; 227 228 /* 229 * remember current values for next scan 230 */ 231 ms->ms_horc = *horc; 232 ms->ms_verc = *verc; 233 234 ms->ms_dx = dx; 235 ms->ms_dy = dy; 236 ms->ms_mb = mb; 237 238 if (dx || dy || ms->ms_ub != ms->ms_mb) { 239 /* 240 * We have at least one event (mouse button, delta-X, or 241 * delta-Y; possibly all three, and possibly three separate 242 * button events). Deliver these events until we are out of 243 * changes or out of room. As events get delivered, mark them 244 * `unchanged'. 245 */ 246 any = 0; 247 get = ms->ms_events.ev_get; 248 put = ms->ms_events.ev_put; 249 fe = &ms->ms_events.ev_q[put]; 250 251 mb = ms->ms_mb; 252 ub = ms->ms_ub; 253 while ((d = mb ^ ub) != 0) { 254 /* 255 * Mouse button change. Convert up to three changes 256 * to the `first' change, and drop it into the event 257 * queue. 258 */ 259 if ((++put) % EV_QSIZE == get) { 260 put--; 261 goto out; 262 } 263 264 d = to_one[d - 1]; /* from 1..7 to {1,2,4} */ 265 fe->id = to_id[d - 1]; /* from {1,2,4} to ID */ 266 fe->value = mb & d ? VKEY_DOWN : VKEY_UP; 267 fe->time = time; 268 fe++; 269 270 if (put >= EV_QSIZE) { 271 put = 0; 272 fe = &ms->ms_events.ev_q[0]; 273 } 274 any = 1; 275 276 ub ^= d; 277 } 278 if (ms->ms_dx) { 279 if ((++put) % EV_QSIZE == get) { 280 put--; 281 goto out; 282 } 283 284 fe->id = LOC_X_DELTA; 285 fe->value = ms->ms_dx; 286 fe->time = time; 287 fe++; 288 289 if (put >= EV_QSIZE) { 290 put = 0; 291 fe = &ms->ms_events.ev_q[0]; 292 } 293 any = 1; 294 295 ms->ms_dx = 0; 296 } 297 if (ms->ms_dy) { 298 if ((++put) % EV_QSIZE == get) { 299 put--; 300 goto out; 301 } 302 303 fe->id = LOC_Y_DELTA; 304 fe->value = ms->ms_dy; 305 fe->time = time; 306 fe++; 307 308 if (put >= EV_QSIZE) { 309 put = 0; 310 fe = &ms->ms_events.ev_q[0]; 311 } 312 any = 1; 313 314 ms->ms_dy = 0; 315 } 316 out: 317 if (any) { 318 ms->ms_ub = ub; 319 ms->ms_events.ev_put = put; 320 EV_WAKEUP(&ms->ms_events); 321 } 322 } 323 324 /* 325 * reschedule handler, or if terminating, 326 * handshake with ms_disable 327 */ 328 if (ms->ms_ready) 329 timeout(msintr, (void *)unit, 2); 330 else 331 wakeup(ms); 332 } 333 334 int 335 msopen(dev, flags, mode, p) 336 dev_t dev; 337 int flags, mode; 338 struct proc *p; 339 { 340 struct ms_softc *ms; 341 int unit; 342 343 unit = minor(dev); 344 ms = (struct ms_softc *)getsoftc(ms_cd, unit); 345 346 if (ms == NULL) 347 return(EXDEV); 348 349 if (ms->ms_events.ev_io) 350 return(EBUSY); 351 352 ms->ms_events.ev_io = p; 353 ev_init(&ms->ms_events); /* may cause sleep */ 354 ms_enable(dev); 355 return(0); 356 } 357 358 int 359 msclose(dev, flags, mode, p) 360 dev_t dev; 361 int flags, mode; 362 struct proc *p; 363 { 364 int unit; 365 struct ms_softc *ms; 366 367 unit = minor (dev); 368 ms = (struct ms_softc *)getsoftc(ms_cd, unit); 369 370 ms_disable(dev); 371 ev_fini(&ms->ms_events); 372 ms->ms_events.ev_io = NULL; 373 return(0); 374 } 375 376 int 377 msread(dev, uio, flags) 378 dev_t dev; 379 struct uio *uio; 380 int flags; 381 { 382 struct ms_softc *ms; 383 384 ms = (struct ms_softc *)getsoftc(ms_cd, minor(dev)); 385 386 return(ev_read(&ms->ms_events, uio, flags)); 387 } 388 389 int 390 msioctl(dev, cmd, data, flag, p) 391 dev_t dev; 392 u_long cmd; 393 register caddr_t data; 394 int flag; 395 struct proc *p; 396 { 397 struct ms_softc *ms; 398 int unit; 399 400 unit = minor(dev); 401 ms = (struct ms_softc *)getsoftc(ms_cd, unit); 402 403 switch (cmd) { 404 case FIONBIO: /* we will remove this someday (soon???) */ 405 return(0); 406 case FIOASYNC: 407 ms->ms_events.ev_async = *(int *)data != 0; 408 return(0); 409 case TIOCSPGRP: 410 if (*(int *)data != ms->ms_events.ev_io->p_pgid) 411 return(EPERM); 412 return(0); 413 case VUIDGFORMAT: /* we only do firm_events */ 414 *(int *)data = VUID_FIRM_EVENT; 415 return(0); 416 case VUIDSFORMAT: 417 if (*(int *)data != VUID_FIRM_EVENT) 418 return(EINVAL); 419 return(0); 420 } 421 return(ENOTTY); 422 } 423 424 int 425 mspoll(dev, events, p) 426 dev_t dev; 427 int events; 428 struct proc *p; 429 { 430 struct ms_softc *ms; 431 432 ms = (struct ms_softc *)getsoftc(ms_cd, minor(dev)); 433 434 return(ev_poll(&ms->ms_events, events, p)); 435 } 436