1 /* $NetBSD: ms.c,v 1.20 2002/01/28 09:57:01 aymeric 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 #include <sys/cdefs.h> 52 __KERNEL_RCSID(0, "$NetBSD: ms.c,v 1.20 2002/01/28 09:57:01 aymeric Exp $"); 53 54 /* 55 * Mouse driver. 56 */ 57 58 #include <sys/param.h> 59 #include <sys/device.h> 60 #include <sys/ioctl.h> 61 #include <sys/kernel.h> 62 #include <sys/proc.h> 63 #include <sys/syslog.h> 64 #include <sys/systm.h> 65 #include <sys/callout.h> 66 #include <sys/tty.h> 67 #include <sys/signalvar.h> 68 69 #include <amiga/dev/event_var.h> 70 #include <amiga/dev/vuid_event.h> 71 72 #include <amiga/amiga/custom.h> 73 #include <amiga/amiga/cia.h> 74 #include <amiga/amiga/device.h> 75 76 #include <sys/conf.h> 77 #include <machine/conf.h> 78 79 void msattach(struct device *, struct device *, void *); 80 int msmatch(struct device *, struct cfdata *, void *); 81 82 /* per-port state */ 83 struct ms_port { 84 int ms_portno; /* which hardware port, for msintr() */ 85 86 struct callout ms_intr_ch; 87 88 u_char ms_horc; /* horizontal counter on last scan */ 89 u_char ms_verc; /* vertical counter on last scan */ 90 char ms_mb; /* mouse button state */ 91 char ms_ub; /* user button state */ 92 int ms_dx; /* delta-x */ 93 int ms_dy; /* delta-y */ 94 volatile int ms_ready; /* event queue is ready */ 95 struct evvar ms_events; /* event queue state */ 96 }; 97 98 #define MS_NPORTS 2 99 100 struct ms_softc { 101 struct device sc_dev; /* base device */ 102 struct ms_port sc_ports[MS_NPORTS]; 103 }; 104 105 struct cfattach ms_ca = { 106 sizeof(struct ms_softc), msmatch, msattach 107 }; 108 109 void msintr(void *); 110 void ms_enable(struct ms_port *); 111 void ms_disable(struct ms_port *); 112 113 extern struct cfdriver ms_cd; 114 115 #define MS_UNIT(d) ((minor(d) & ~0x1) >> 1) 116 #define MS_PORT(d) (minor(d) & 0x1) 117 118 /* 119 * Given a dev_t, return a pointer to the port's hardware state. 120 * Assumes the unit to be valid, so do *not* utilize this in msopen(). 121 */ 122 #define MS_DEV2MSPORT(d) \ 123 (&(((struct ms_softc *)getsoftc(ms_cd, MS_UNIT(d)))->sc_ports[MS_PORT(d)])) 124 125 int 126 msmatch(struct device *pdp, struct cfdata *cfp, void *auxp) 127 { 128 static int ms_matched = 0; 129 130 /* Allow only one instance. */ 131 if (!matchname((char *)auxp, "ms") || ms_matched) 132 return 0; 133 134 ms_matched = 1; 135 return 1; 136 } 137 138 void 139 msattach(struct device *pdp, struct device *dp, void *auxp) 140 { 141 struct ms_softc *sc = (void *) dp; 142 int i; 143 144 printf("\n"); 145 for (i = 0; i < MS_NPORTS; i++) { 146 sc->sc_ports[i].ms_portno = i; 147 callout_init(&sc->sc_ports[i].ms_intr_ch); 148 } 149 } 150 151 /* 152 * Amiga mice are hooked up to one of the two "game" ports, where 153 * the main mouse is usually on the first port, and port 2 can 154 * be used by a joystick. Nevertheless, we support two mouse 155 * devices, /dev/mouse0 and /dev/mouse1 (with a link of /dev/mouse to 156 * the device that represents the port of the mouse in use). 157 */ 158 159 /* 160 * enable scanner, called when someone opens the port. 161 */ 162 void 163 ms_enable(struct ms_port *ms) 164 { 165 166 /* 167 * use this as flag to the "interrupt" to tell it when to 168 * shut off (when it's reset to 0). 169 */ 170 ms->ms_ready = 1; 171 172 callout_reset(&ms->ms_intr_ch, 2, msintr, ms); 173 } 174 175 /* 176 * disable scanner. Just set ms_ready to 0, and after the next 177 * timeout taken, no further timeouts will be initiated. 178 */ 179 void 180 ms_disable(struct ms_port *ms) 181 { 182 int s; 183 184 s = splhigh (); 185 ms->ms_ready = 0; 186 /* 187 * sync with the interrupt 188 */ 189 tsleep(ms, PZERO - 1, "mouse-disable", 0); 190 splx(s); 191 } 192 193 194 /* 195 * we're emulating a mousesystems serial mouse here.. 196 */ 197 void 198 msintr(void *arg) 199 { 200 static const char to_one[] = { 1, 2, 2, 4, 4, 4, 4 }; 201 static const int to_id[] = { MS_RIGHT, MS_MIDDLE, 0, MS_LEFT }; 202 struct ms_port *ms = arg; 203 struct firm_event *fe; 204 int mb, ub, d, get, put, any, port; 205 u_char pra, *horc, *verc; 206 u_short pot, count; 207 short dx, dy; 208 209 port = ms->ms_portno; 210 211 horc = ((u_char *) &count) + 1; 212 verc = (u_char *) &count; 213 214 /* 215 * first read the three buttons. 216 */ 217 pot = custom.potgor; 218 pra = ciaa.pra; 219 pot >>= port == 0 ? 8 : 12; /* contains right and middle button */ 220 pra >>= port == 0 ? 6 : 7; /* contains left button */ 221 mb = (pot & 4) / 4 + (pot & 1) * 2 + (pra & 1) * 4; 222 mb ^= 0x07; 223 224 /* 225 * read current values of counter registers 226 */ 227 if (port == 0) 228 count = custom.joy0dat; 229 else 230 count = custom.joy1dat; 231 232 /* 233 * take care of wraparound 234 */ 235 dx = *horc - ms->ms_horc; 236 if (dx < -127) 237 dx += 255; 238 else if (dx > 127) 239 dx -= 255; 240 dy = *verc - ms->ms_verc; 241 if (dy < -127) 242 dy += 255; 243 else if (dy > 127) 244 dy -= 255; 245 246 /* 247 * remember current values for next scan 248 */ 249 ms->ms_horc = *horc; 250 ms->ms_verc = *verc; 251 252 ms->ms_dx = dx; 253 ms->ms_dy = dy; 254 ms->ms_mb = mb; 255 256 if (dx || dy || ms->ms_ub != ms->ms_mb) { 257 /* 258 * We have at least one event (mouse button, delta-X, or 259 * delta-Y; possibly all three, and possibly three separate 260 * button events). Deliver these events until we are out of 261 * changes or out of room. As events get delivered, mark them 262 * `unchanged'. 263 */ 264 any = 0; 265 get = ms->ms_events.ev_get; 266 put = ms->ms_events.ev_put; 267 fe = &ms->ms_events.ev_q[put]; 268 269 mb = ms->ms_mb; 270 ub = ms->ms_ub; 271 while ((d = mb ^ ub) != 0) { 272 /* 273 * Mouse button change. Convert up to three changes 274 * to the `first' change, and drop it into the event 275 * queue. 276 */ 277 if ((++put) % EV_QSIZE == get) { 278 put--; 279 goto out; 280 } 281 282 d = to_one[d - 1]; /* from 1..7 to {1,2,4} */ 283 fe->id = to_id[d - 1]; /* from {1,2,4} to ID */ 284 fe->value = mb & d ? VKEY_DOWN : VKEY_UP; 285 fe->time = time; 286 fe++; 287 288 if (put >= EV_QSIZE) { 289 put = 0; 290 fe = &ms->ms_events.ev_q[0]; 291 } 292 any = 1; 293 294 ub ^= d; 295 } 296 if (ms->ms_dx) { 297 if ((++put) % EV_QSIZE == get) { 298 put--; 299 goto out; 300 } 301 302 fe->id = LOC_X_DELTA; 303 fe->value = ms->ms_dx; 304 fe->time = time; 305 fe++; 306 307 if (put >= EV_QSIZE) { 308 put = 0; 309 fe = &ms->ms_events.ev_q[0]; 310 } 311 any = 1; 312 313 ms->ms_dx = 0; 314 } 315 if (ms->ms_dy) { 316 if ((++put) % EV_QSIZE == get) { 317 put--; 318 goto out; 319 } 320 321 fe->id = LOC_Y_DELTA; 322 fe->value = ms->ms_dy; 323 fe->time = time; 324 fe++; 325 326 if (put >= EV_QSIZE) { 327 put = 0; 328 fe = &ms->ms_events.ev_q[0]; 329 } 330 any = 1; 331 332 ms->ms_dy = 0; 333 } 334 out: 335 if (any) { 336 ms->ms_ub = ub; 337 ms->ms_events.ev_put = put; 338 EV_WAKEUP(&ms->ms_events); 339 } 340 } 341 342 /* 343 * reschedule handler, or if terminating, 344 * handshake with ms_disable 345 */ 346 if (ms->ms_ready) 347 callout_reset(&ms->ms_intr_ch, 2, msintr, ms); 348 else 349 wakeup(ms); 350 } 351 352 int 353 msopen(dev_t dev, int flags, int mode, struct proc *p) 354 { 355 struct ms_softc *sc; 356 struct ms_port *ms; 357 int unit, port; 358 359 unit = MS_UNIT(dev); 360 sc = (struct ms_softc *)getsoftc(ms_cd, unit); 361 362 if (sc == NULL) 363 return(EXDEV); 364 365 port = MS_PORT(dev); 366 ms = &sc->sc_ports[port]; 367 368 if (ms->ms_events.ev_io) 369 return(EBUSY); 370 371 /* initialize potgo bits for mouse mode */ 372 custom.potgo = custom.potgor | (0xf00 << (port * 4)); 373 374 ms->ms_events.ev_io = p; 375 ev_init(&ms->ms_events); /* may cause sleep */ 376 ms_enable(ms); 377 return(0); 378 } 379 380 int 381 msclose(dev_t dev, int flags, int mode, struct proc *p) 382 { 383 struct ms_port *ms; 384 385 ms = MS_DEV2MSPORT(dev); 386 387 ms_disable(ms); 388 ev_fini(&ms->ms_events); 389 ms->ms_events.ev_io = NULL; 390 return(0); 391 } 392 393 int 394 msread(dev_t dev, struct uio *uio, int flags) 395 { 396 struct ms_port *ms; 397 398 ms = MS_DEV2MSPORT(dev); 399 400 return(ev_read(&ms->ms_events, uio, flags)); 401 } 402 403 int 404 msioctl(dev_t dev, u_long cmd, register caddr_t data, int flag, 405 struct proc *p) 406 { 407 struct ms_port *ms; 408 409 ms = MS_DEV2MSPORT(dev); 410 411 switch (cmd) { 412 case FIONBIO: /* we will remove this someday (soon???) */ 413 return(0); 414 case FIOASYNC: 415 ms->ms_events.ev_async = *(int *)data != 0; 416 return(0); 417 case TIOCSPGRP: 418 if (*(int *)data != ms->ms_events.ev_io->p_pgid) 419 return(EPERM); 420 return(0); 421 case VUIDGFORMAT: /* we only do firm_events */ 422 *(int *)data = VUID_FIRM_EVENT; 423 return(0); 424 case VUIDSFORMAT: 425 if (*(int *)data != VUID_FIRM_EVENT) 426 return(EINVAL); 427 return(0); 428 } 429 return(ENOTTY); 430 } 431 432 int 433 mspoll(dev_t dev, int events, struct proc *p) 434 { 435 struct ms_port *ms; 436 437 ms = MS_DEV2MSPORT(dev); 438 439 return(ev_poll(&ms->ms_events, events, p)); 440 } 441