ms.c revision 1.4.2.1
1 /* $NetBSD: ms.c,v 1.4.2.1 1999/02/05 06:56:08 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. All advertising materials mentioning features or use of this software 25 * must display the following acknowledgement: 26 * This product includes software developed by the University of 27 * California, Berkeley and its contributors. 28 * 4. Neither the name of the University nor the names of its contributors 29 * may be used to endorse or promote products derived from this software 30 * without specific prior written permission. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 42 * SUCH DAMAGE. 43 * 44 * @(#)ms.c 8.1 (Berkeley) 6/11/93 45 */ 46 47 /* 48 * Mouse driver. 49 */ 50 51 #include "mouse.h" 52 #if NMOUSE > 0 53 54 #include <sys/param.h> 55 #include <sys/conf.h> 56 #include <sys/ioctl.h> 57 #include <sys/kernel.h> 58 #include <sys/proc.h> 59 #include <sys/syslog.h> 60 #include <sys/systm.h> 61 #include <sys/tty.h> 62 63 #include <x68k/dev/event_var.h> 64 #include <machine/vuid_event.h> 65 66 #include <x68k/x68k/iodevice.h> 67 68 /* 69 * Mouse state. A SHARP X1/X680x0 mouse is a fairly simple device, 70 * producing three-byte blobs of the form: 71 * 72 * b dx dy 73 * 74 * where b is the button state, encoded as 0x80|(buttons)---there are 75 * two buttons (2=left, 1=right)---and dx,dy are X and Y delta values. 76 */ 77 struct ms_softc { 78 short ms_byteno; /* input byte number, for decode */ 79 char ms_mb; /* mouse button state */ 80 char ms_ub; /* user button state */ 81 int ms_dx; /* delta-x */ 82 int ms_dy; /* delta-y */ 83 struct tty *ms_mouse; /* downlink for output to mouse */ 84 void (*ms_open) __P((struct tty *)); /* enable dataflow */ 85 void (*ms_close) __P((struct tty *));/* disable dataflow */ 86 volatile int ms_ready; /* event queue is ready */ 87 struct evvar ms_events; /* event queue state */ 88 } ms_softc; 89 90 cdev_decl(ms); 91 92 void ms_serial __P((struct tty *, void(*)(struct tty *), 93 void(*)(struct tty *))); 94 void ms_modem __P((int)); 95 void ms_rint __P((int)); 96 void mouseattach __P((void)); 97 98 /* 99 * Attach the mouse serial (down-link) interface. 100 * Do we need to set it to 4800 baud, 8 bits? 101 * Test by power cycling and not booting Human68k before BSD? 102 */ 103 void 104 ms_serial(tp, iopen, iclose) 105 struct tty *tp; 106 void (*iopen) __P((struct tty *)); 107 void (*iclose) __P((struct tty *)); 108 { 109 110 ms_softc.ms_mouse = tp; 111 ms_softc.ms_open = iopen; 112 ms_softc.ms_close = iclose; 113 } 114 115 void 116 ms_modem(onoff) 117 register int onoff; 118 { 119 static int oonoff; 120 121 if (ms_softc.ms_ready == 1) { 122 if (ms_softc.ms_byteno == -1) 123 ms_softc.ms_byteno = onoff = 0; 124 if (oonoff != onoff) { 125 zs_msmodem(onoff); 126 oonoff = onoff; 127 } 128 } 129 } 130 131 void 132 ms_rint(c) 133 register int c; 134 { 135 register struct firm_event *fe; 136 register struct ms_softc *ms = &ms_softc; 137 register int mb, ub, d, get, put, any; 138 static const char to_one[] = { 1, 2, 3 }; 139 static const int to_id[] = { MS_LEFT, MS_RIGHT, MS_MIDDLE }; 140 141 /* 142 * Discard input if not ready. Drop sync on parity or framing 143 * error; gain sync on button byte. 144 */ 145 if (ms->ms_ready == 0) 146 return; 147 if (c & (TTY_FE|TTY_PE)) { 148 log(LOG_WARNING, 149 "mouse input parity or framing error (0x%x)\n", c); 150 ms->ms_byteno = -1; 151 return; 152 } 153 154 /* 155 * Run the decode loop, adding to the current information. 156 * We add, rather than replace, deltas, so that if the event queue 157 * fills, we accumulate data for when it opens up again. 158 */ 159 switch (ms->ms_byteno) { 160 161 case -1: 162 return; 163 164 case 0: 165 /* buttons */ 166 ms->ms_byteno = 1; 167 ms->ms_mb = c & 0x7; 168 return; 169 170 case 1: 171 /* delta-x */ 172 ms->ms_byteno = 2; 173 ms->ms_dx += (char)c; 174 return; 175 176 case 2: 177 /* delta-y */ 178 ms->ms_byteno = -1 /* wait for button-byte again */; 179 ms->ms_dy += (char)c; 180 break; 181 182 default: 183 panic("ms_rint"); 184 /* NOTREACHED */ 185 } 186 187 /* 188 * We have at least one event (mouse button, delta-X, or 189 * delta-Y; possibly all three, and possibly three separate 190 * button events). Deliver these events until we are out 191 * of changes or out of room. As events get delivered, 192 * mark them `unchanged'. 193 */ 194 any = 0; 195 get = ms->ms_events.ev_get; 196 put = ms->ms_events.ev_put; 197 fe = &ms->ms_events.ev_q[put]; 198 199 /* NEXT prepares to put the next event, backing off if necessary */ 200 #define NEXT \ 201 if ((++put) % EV_QSIZE == get) { \ 202 put--; \ 203 goto out; \ 204 } 205 /* ADVANCE completes the `put' of the event */ 206 #define ADVANCE \ 207 fe++; \ 208 if (put >= EV_QSIZE) { \ 209 put = 0; \ 210 fe = &ms->ms_events.ev_q[0]; \ 211 } \ 212 any = 1 213 214 mb = ms->ms_mb; 215 ub = ms->ms_ub; 216 while ((d = mb ^ ub) != 0) { 217 /* 218 * Mouse button change. Convert up to three changes 219 * to the `first' change, and drop it into the event queue. 220 */ 221 NEXT; 222 d = to_one[d - 1]; /* from 1..7 to {1,2,4} */ 223 fe->id = to_id[d - 1]; /* from {1,2,4} to ID */ 224 fe->value = mb & d ? VKEY_DOWN : VKEY_UP; 225 fe->time = time; 226 ADVANCE; 227 ub ^= d; 228 } 229 if (ms->ms_dx) { 230 NEXT; 231 fe->id = LOC_X_DELTA; 232 fe->value = ms->ms_dx; 233 fe->time = time; 234 ADVANCE; 235 ms->ms_dx = 0; 236 } 237 if (ms->ms_dy) { 238 NEXT; 239 fe->id = LOC_Y_DELTA; 240 fe->value = -ms->ms_dy; /* XXX? */ 241 fe->time = time; 242 ADVANCE; 243 ms->ms_dy = 0; 244 } 245 out: 246 if (any) { 247 ms->ms_ub = ub; 248 ms->ms_events.ev_put = put; 249 EV_WAKEUP(&ms->ms_events); 250 } 251 } 252 253 int 254 msopen(dev, flags, mode, p) 255 dev_t dev; 256 int flags, mode; 257 struct proc *p; 258 { 259 if (ms_softc.ms_events.ev_io) 260 return (EBUSY); 261 ms_softc.ms_events.ev_io = p; 262 ev_init(&ms_softc.ms_events); /* may cause sleep */ 263 ms_softc.ms_ready = 1; /* start accepting events */ 264 (*ms_softc.ms_open)(ms_softc.ms_mouse); 265 return (0); 266 } 267 int 268 msclose(dev, flags, mode, p) 269 dev_t dev; 270 int flags, mode; 271 struct proc *p; 272 { 273 274 ms_modem(0); 275 ms_softc.ms_ready = 0; /* stop accepting events */ 276 ev_fini(&ms_softc.ms_events); 277 (*ms_softc.ms_close)(ms_softc.ms_mouse); 278 ms_softc.ms_events.ev_io = NULL; 279 return (0); 280 } 281 282 int 283 msread(dev, uio, flags) 284 dev_t dev; 285 struct uio *uio; 286 int flags; 287 { 288 289 return (ev_read(&ms_softc.ms_events, uio, flags)); 290 } 291 292 /* this routine should not exist, but is convenient to write here for now */ 293 int 294 mswrite(dev, uio, flags) 295 dev_t dev; 296 struct uio *uio; 297 int flags; 298 { 299 300 return (EOPNOTSUPP); 301 } 302 303 int 304 msioctl(dev, cmd, data, flag, p) 305 dev_t dev; 306 u_long cmd; 307 register caddr_t data; 308 int flag; 309 struct proc *p; 310 { 311 switch (cmd) { 312 313 case FIONBIO: /* we will remove this someday (soon???) */ 314 return (0); 315 316 case FIOASYNC: 317 ms_softc.ms_events.ev_async = *(int *)data != 0; 318 return (0); 319 320 case TIOCSPGRP: 321 if (*(int *)data != ms_softc.ms_events.ev_io->p_pgid) 322 return (EPERM); 323 return (0); 324 325 case VUIDGFORMAT: 326 /* we only do firm_events */ 327 *(int *)data = VUID_FIRM_EVENT; 328 return (0); 329 330 case VUIDSFORMAT: 331 if (*(int *)data != VUID_FIRM_EVENT) 332 return (EINVAL); 333 return (0); 334 } 335 return (ENOTTY); 336 } 337 338 int 339 mspoll(dev, events, p) 340 dev_t dev; 341 int events; 342 struct proc *p; 343 { 344 345 return (ev_poll(&ms_softc.ms_events, events, p)); 346 } 347 348 void 349 mouseattach(){} /* XXX pseudo-device */ 350 #endif 351
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