ms.c revision 1.2
1 /* $NetBSD: ms.c,v 1.2 1996/05/21 15:32:31 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 /* 88 * Attach the mouse serial (down-link) interface. 89 * Do we need to set it to 4800 baud, 8 bits? 90 * Test by power cycling and not booting Human68k before BSD? 91 */ 92 void 93 ms_serial(tp, iopen, iclose) 94 struct tty *tp; 95 void (*iopen)(), (*iclose)(); 96 { 97 98 ms_softc.ms_mouse = tp; 99 ms_softc.ms_open = iopen; 100 ms_softc.ms_close = iclose; 101 } 102 103 void 104 ms_modem(onoff) 105 register int onoff; 106 { 107 static int oonoff; 108 109 if (ms_softc.ms_ready == 1) { 110 if (ms_softc.ms_byteno == -1) 111 ms_softc.ms_byteno = onoff = 0; 112 if (oonoff != onoff) { 113 zs_msmodem(onoff); 114 oonoff = onoff; 115 } 116 } 117 } 118 119 void 120 ms_rint(c) 121 register int c; 122 { 123 register struct firm_event *fe; 124 register struct ms_softc *ms = &ms_softc; 125 register int mb, ub, d, get, put, any; 126 static const char to_one[] = { 1, 2, 3 }; 127 static const int to_id[] = { MS_LEFT, MS_RIGHT, MS_MIDDLE }; 128 129 /* 130 * Discard input if not ready. Drop sync on parity or framing 131 * error; gain sync on button byte. 132 */ 133 if (ms->ms_ready == 0) 134 return; 135 if (c & (TTY_FE|TTY_PE)) { 136 log(LOG_WARNING, 137 "mouse input parity or framing error (0x%x)\n", c); 138 ms->ms_byteno = -1; 139 return; 140 } 141 142 /* 143 * Run the decode loop, adding to the current information. 144 * We add, rather than replace, deltas, so that if the event queue 145 * fills, we accumulate data for when it opens up again. 146 */ 147 switch (ms->ms_byteno) { 148 149 case -1: 150 return; 151 152 case 0: 153 /* buttons */ 154 ms->ms_byteno = 1; 155 ms->ms_mb = c & 0x7; 156 return; 157 158 case 1: 159 /* delta-x */ 160 ms->ms_byteno = 2; 161 ms->ms_dx += (char)c; 162 return; 163 164 case 2: 165 /* delta-y */ 166 ms->ms_byteno = -1 /* wait for button-byte again */; 167 ms->ms_dy += (char)c; 168 break; 169 170 default: 171 panic("ms_rint"); 172 /* NOTREACHED */ 173 } 174 175 /* 176 * We have at least one event (mouse button, delta-X, or 177 * delta-Y; possibly all three, and possibly three separate 178 * button events). Deliver these events until we are out 179 * of changes or out of room. As events get delivered, 180 * mark them `unchanged'. 181 */ 182 any = 0; 183 get = ms->ms_events.ev_get; 184 put = ms->ms_events.ev_put; 185 fe = &ms->ms_events.ev_q[put]; 186 187 /* NEXT prepares to put the next event, backing off if necessary */ 188 #define NEXT \ 189 if ((++put) % EV_QSIZE == get) { \ 190 put--; \ 191 goto out; \ 192 } 193 /* ADVANCE completes the `put' of the event */ 194 #define ADVANCE \ 195 fe++; \ 196 if (put >= EV_QSIZE) { \ 197 put = 0; \ 198 fe = &ms->ms_events.ev_q[0]; \ 199 } \ 200 any = 1 201 202 mb = ms->ms_mb; 203 ub = ms->ms_ub; 204 while ((d = mb ^ ub) != 0) { 205 /* 206 * Mouse button change. Convert up to three changes 207 * to the `first' change, and drop it into the event queue. 208 */ 209 NEXT; 210 d = to_one[d - 1]; /* from 1..7 to {1,2,4} */ 211 fe->id = to_id[d - 1]; /* from {1,2,4} to ID */ 212 fe->value = mb & d ? VKEY_DOWN : VKEY_UP; 213 fe->time = time; 214 ADVANCE; 215 ub ^= d; 216 } 217 if (ms->ms_dx) { 218 NEXT; 219 fe->id = LOC_X_DELTA; 220 fe->value = ms->ms_dx; 221 fe->time = time; 222 ADVANCE; 223 ms->ms_dx = 0; 224 } 225 if (ms->ms_dy) { 226 NEXT; 227 fe->id = LOC_Y_DELTA; 228 fe->value = -ms->ms_dy; /* XXX? */ 229 fe->time = time; 230 ADVANCE; 231 ms->ms_dy = 0; 232 } 233 out: 234 if (any) { 235 ms->ms_ub = ub; 236 ms->ms_events.ev_put = put; 237 EV_WAKEUP(&ms->ms_events); 238 } 239 } 240 241 int 242 msopen(dev, flags, mode, p) 243 dev_t dev; 244 int flags, mode; 245 struct proc *p; 246 { 247 if (ms_softc.ms_events.ev_io) 248 return (EBUSY); 249 ms_softc.ms_events.ev_io = p; 250 ev_init(&ms_softc.ms_events); /* may cause sleep */ 251 ms_softc.ms_ready = 1; /* start accepting events */ 252 (*ms_softc.ms_open)(ms_softc.ms_mouse); 253 return (0); 254 } 255 int 256 msclose(dev, flags, mode, p) 257 dev_t dev; 258 int flags, mode; 259 struct proc *p; 260 { 261 262 ms_modem(0); 263 ms_softc.ms_ready = 0; /* stop accepting events */ 264 ev_fini(&ms_softc.ms_events); 265 (*ms_softc.ms_close)(ms_softc.ms_mouse); 266 ms_softc.ms_events.ev_io = NULL; 267 return (0); 268 } 269 270 int 271 msread(dev, uio, flags) 272 dev_t dev; 273 struct uio *uio; 274 int flags; 275 { 276 277 return (ev_read(&ms_softc.ms_events, uio, flags)); 278 } 279 280 /* this routine should not exist, but is convenient to write here for now */ 281 int 282 mswrite(dev, uio, flags) 283 dev_t dev; 284 struct uio *uio; 285 int flags; 286 { 287 288 return (EOPNOTSUPP); 289 } 290 291 int 292 msioctl(dev, cmd, data, flag, p) 293 dev_t dev; 294 u_long cmd; 295 register caddr_t data; 296 int flag; 297 struct proc *p; 298 { 299 switch (cmd) { 300 301 case FIONBIO: /* we will remove this someday (soon???) */ 302 return (0); 303 304 case FIOASYNC: 305 ms_softc.ms_events.ev_async = *(int *)data != 0; 306 return (0); 307 308 case TIOCSPGRP: 309 if (*(int *)data != ms_softc.ms_events.ev_io->p_pgid) 310 return (EPERM); 311 return (0); 312 313 case VUIDGFORMAT: 314 /* we only do firm_events */ 315 *(int *)data = VUID_FIRM_EVENT; 316 return (0); 317 318 case VUIDSFORMAT: 319 if (*(int *)data != VUID_FIRM_EVENT) 320 return (EINVAL); 321 return (0); 322 } 323 return (ENOTTY); 324 } 325 326 int 327 msselect(dev, rw, p) 328 dev_t dev; 329 int rw; 330 struct proc *p; 331 { 332 333 return (ev_select(&ms_softc.ms_events, rw, p)); 334 } 335 336 void 337 mouseattach(){} /* XXX pseudo-device */ 338
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