ms.c revision 1.4
1 /* $NetBSD: ms.c,v 1.4 1997/10/12 06:42:18 oki 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 <sys/param.h> 52 #include <sys/conf.h> 53 #include <sys/ioctl.h> 54 #include <sys/kernel.h> 55 #include <sys/proc.h> 56 #include <sys/syslog.h> 57 #include <sys/systm.h> 58 #include <sys/tty.h> 59 60 #include <x68k/dev/event_var.h> 61 #include <machine/vuid_event.h> 62 63 #include <x68k/x68k/iodevice.h> 64 65 /* 66 * Mouse state. A SHARP X1/X680x0 mouse is a fairly simple device, 67 * producing three-byte blobs of the form: 68 * 69 * b dx dy 70 * 71 * where b is the button state, encoded as 0x80|(buttons)---there are 72 * two buttons (2=left, 1=right)---and dx,dy are X and Y delta values. 73 */ 74 struct ms_softc { 75 short ms_byteno; /* input byte number, for decode */ 76 char ms_mb; /* mouse button state */ 77 char ms_ub; /* user button state */ 78 int ms_dx; /* delta-x */ 79 int ms_dy; /* delta-y */ 80 struct tty *ms_mouse; /* downlink for output to mouse */ 81 void (*ms_open) __P((struct tty *)); /* enable dataflow */ 82 void (*ms_close) __P((struct tty *));/* disable dataflow */ 83 volatile int ms_ready; /* event queue is ready */ 84 struct evvar ms_events; /* event queue state */ 85 } ms_softc; 86 87 cdev_decl(ms); 88 89 void ms_serial __P((struct tty *, void(*)(struct tty *), 90 void(*)(struct tty *))); 91 void ms_modem __P((int)); 92 void ms_rint __P((int)); 93 void mouseattach __P((void)); 94 95 /* 96 * Attach the mouse serial (down-link) interface. 97 * Do we need to set it to 4800 baud, 8 bits? 98 * Test by power cycling and not booting Human68k before BSD? 99 */ 100 void 101 ms_serial(tp, iopen, iclose) 102 struct tty *tp; 103 void (*iopen) __P((struct tty *)); 104 void (*iclose) __P((struct tty *)); 105 { 106 107 ms_softc.ms_mouse = tp; 108 ms_softc.ms_open = iopen; 109 ms_softc.ms_close = iclose; 110 } 111 112 void 113 ms_modem(onoff) 114 register int onoff; 115 { 116 static int oonoff; 117 118 if (ms_softc.ms_ready == 1) { 119 if (ms_softc.ms_byteno == -1) 120 ms_softc.ms_byteno = onoff = 0; 121 if (oonoff != onoff) { 122 zs_msmodem(onoff); 123 oonoff = onoff; 124 } 125 } 126 } 127 128 void 129 ms_rint(c) 130 register int c; 131 { 132 register struct firm_event *fe; 133 register struct ms_softc *ms = &ms_softc; 134 register int mb, ub, d, get, put, any; 135 static const char to_one[] = { 1, 2, 3 }; 136 static const int to_id[] = { MS_LEFT, MS_RIGHT, MS_MIDDLE }; 137 138 /* 139 * Discard input if not ready. Drop sync on parity or framing 140 * error; gain sync on button byte. 141 */ 142 if (ms->ms_ready == 0) 143 return; 144 if (c & (TTY_FE|TTY_PE)) { 145 log(LOG_WARNING, 146 "mouse input parity or framing error (0x%x)\n", c); 147 ms->ms_byteno = -1; 148 return; 149 } 150 151 /* 152 * Run the decode loop, adding to the current information. 153 * We add, rather than replace, deltas, so that if the event queue 154 * fills, we accumulate data for when it opens up again. 155 */ 156 switch (ms->ms_byteno) { 157 158 case -1: 159 return; 160 161 case 0: 162 /* buttons */ 163 ms->ms_byteno = 1; 164 ms->ms_mb = c & 0x7; 165 return; 166 167 case 1: 168 /* delta-x */ 169 ms->ms_byteno = 2; 170 ms->ms_dx += (char)c; 171 return; 172 173 case 2: 174 /* delta-y */ 175 ms->ms_byteno = -1 /* wait for button-byte again */; 176 ms->ms_dy += (char)c; 177 break; 178 179 default: 180 panic("ms_rint"); 181 /* NOTREACHED */ 182 } 183 184 /* 185 * We have at least one event (mouse button, delta-X, or 186 * delta-Y; possibly all three, and possibly three separate 187 * button events). Deliver these events until we are out 188 * of changes or out of room. As events get delivered, 189 * mark them `unchanged'. 190 */ 191 any = 0; 192 get = ms->ms_events.ev_get; 193 put = ms->ms_events.ev_put; 194 fe = &ms->ms_events.ev_q[put]; 195 196 /* NEXT prepares to put the next event, backing off if necessary */ 197 #define NEXT \ 198 if ((++put) % EV_QSIZE == get) { \ 199 put--; \ 200 goto out; \ 201 } 202 /* ADVANCE completes the `put' of the event */ 203 #define ADVANCE \ 204 fe++; \ 205 if (put >= EV_QSIZE) { \ 206 put = 0; \ 207 fe = &ms->ms_events.ev_q[0]; \ 208 } \ 209 any = 1 210 211 mb = ms->ms_mb; 212 ub = ms->ms_ub; 213 while ((d = mb ^ ub) != 0) { 214 /* 215 * Mouse button change. Convert up to three changes 216 * to the `first' change, and drop it into the event queue. 217 */ 218 NEXT; 219 d = to_one[d - 1]; /* from 1..7 to {1,2,4} */ 220 fe->id = to_id[d - 1]; /* from {1,2,4} to ID */ 221 fe->value = mb & d ? VKEY_DOWN : VKEY_UP; 222 fe->time = time; 223 ADVANCE; 224 ub ^= d; 225 } 226 if (ms->ms_dx) { 227 NEXT; 228 fe->id = LOC_X_DELTA; 229 fe->value = ms->ms_dx; 230 fe->time = time; 231 ADVANCE; 232 ms->ms_dx = 0; 233 } 234 if (ms->ms_dy) { 235 NEXT; 236 fe->id = LOC_Y_DELTA; 237 fe->value = -ms->ms_dy; /* XXX? */ 238 fe->time = time; 239 ADVANCE; 240 ms->ms_dy = 0; 241 } 242 out: 243 if (any) { 244 ms->ms_ub = ub; 245 ms->ms_events.ev_put = put; 246 EV_WAKEUP(&ms->ms_events); 247 } 248 } 249 250 int 251 msopen(dev, flags, mode, p) 252 dev_t dev; 253 int flags, mode; 254 struct proc *p; 255 { 256 if (ms_softc.ms_events.ev_io) 257 return (EBUSY); 258 ms_softc.ms_events.ev_io = p; 259 ev_init(&ms_softc.ms_events); /* may cause sleep */ 260 ms_softc.ms_ready = 1; /* start accepting events */ 261 (*ms_softc.ms_open)(ms_softc.ms_mouse); 262 return (0); 263 } 264 int 265 msclose(dev, flags, mode, p) 266 dev_t dev; 267 int flags, mode; 268 struct proc *p; 269 { 270 271 ms_modem(0); 272 ms_softc.ms_ready = 0; /* stop accepting events */ 273 ev_fini(&ms_softc.ms_events); 274 (*ms_softc.ms_close)(ms_softc.ms_mouse); 275 ms_softc.ms_events.ev_io = NULL; 276 return (0); 277 } 278 279 int 280 msread(dev, uio, flags) 281 dev_t dev; 282 struct uio *uio; 283 int flags; 284 { 285 286 return (ev_read(&ms_softc.ms_events, uio, flags)); 287 } 288 289 /* this routine should not exist, but is convenient to write here for now */ 290 int 291 mswrite(dev, uio, flags) 292 dev_t dev; 293 struct uio *uio; 294 int flags; 295 { 296 297 return (EOPNOTSUPP); 298 } 299 300 int 301 msioctl(dev, cmd, data, flag, p) 302 dev_t dev; 303 u_long cmd; 304 register caddr_t data; 305 int flag; 306 struct proc *p; 307 { 308 switch (cmd) { 309 310 case FIONBIO: /* we will remove this someday (soon???) */ 311 return (0); 312 313 case FIOASYNC: 314 ms_softc.ms_events.ev_async = *(int *)data != 0; 315 return (0); 316 317 case TIOCSPGRP: 318 if (*(int *)data != ms_softc.ms_events.ev_io->p_pgid) 319 return (EPERM); 320 return (0); 321 322 case VUIDGFORMAT: 323 /* we only do firm_events */ 324 *(int *)data = VUID_FIRM_EVENT; 325 return (0); 326 327 case VUIDSFORMAT: 328 if (*(int *)data != VUID_FIRM_EVENT) 329 return (EINVAL); 330 return (0); 331 } 332 return (ENOTTY); 333 } 334 335 int 336 mspoll(dev, events, p) 337 dev_t dev; 338 int events; 339 struct proc *p; 340 { 341 342 return (ev_poll(&ms_softc.ms_events, events, p)); 343 } 344 345 void 346 mouseattach(){} /* XXX pseudo-device */ 347
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