mms.c revision 1.32
1 /* $NetBSD: mms.c,v 1.32 1998/08/15 03:02:39 mycroft Exp $ */ 2 3 /*- 4 * Copyright (c) 1993, 1994 Charles M. Hannum. 5 * Copyright (c) 1992, 1993 Erik Forsberg. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 14 * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED 15 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 16 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 17 * NO EVENT SHALL I BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 21 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 22 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 23 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include <sys/param.h> 27 #include <sys/kernel.h> 28 #include <sys/systm.h> 29 #include <sys/buf.h> 30 #include <sys/malloc.h> 31 #include <sys/ioctl.h> 32 #include <sys/tty.h> 33 #include <sys/file.h> 34 #include <sys/select.h> 35 #include <sys/proc.h> 36 #include <sys/vnode.h> 37 #include <sys/device.h> 38 #include <sys/poll.h> 39 40 #include <machine/cpu.h> 41 #include <machine/intr.h> 42 #include <machine/bus.h> 43 #include <machine/mouse.h> 44 #include <machine/conf.h> 45 46 #include <dev/isa/isavar.h> 47 48 #define MMS_ADDR 0 /* offset for register select */ 49 #define MMS_DATA 1 /* offset for InPort data */ 50 #define MMS_IDENT 2 /* offset for identification register */ 51 #define MMS_NPORTS 4 52 53 #define MMS_CHUNK 128 /* chunk size for read */ 54 #define MMS_BSIZE 1020 /* buffer size */ 55 56 struct mms_softc { /* driver status information */ 57 struct device sc_dev; 58 void *sc_ih; 59 60 bus_space_tag_t sc_iot; 61 bus_space_handle_t sc_ioh; 62 63 struct clist sc_q; 64 struct selinfo sc_rsel; 65 u_char sc_state; /* mouse driver state */ 66 #define MMS_OPEN 0x01 /* device is open */ 67 #define MMS_ASLP 0x02 /* waiting for mouse data */ 68 u_char sc_status; /* mouse button status */ 69 int sc_x, sc_y; /* accumulated motion in the X,Y axis */ 70 }; 71 72 int mmsprobe __P((struct device *, struct cfdata *, void *)); 73 void mmsattach __P((struct device *, struct device *, void *)); 74 int mmsintr __P((void *)); 75 76 struct cfattach mms_ca = { 77 sizeof(struct mms_softc), mmsprobe, mmsattach 78 }; 79 80 extern struct cfdriver mms_cd; 81 82 #define MMSUNIT(dev) (minor(dev)) 83 84 int 85 mmsprobe(parent, match, aux) 86 struct device *parent; 87 struct cfdata *match; 88 void *aux; 89 { 90 struct isa_attach_args *ia = aux; 91 bus_space_tag_t iot = ia->ia_iot; 92 bus_space_handle_t ioh; 93 int rv; 94 95 /* Disallow wildcarded i/o address. */ 96 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 97 return 0; 98 99 /* Map the i/o space. */ 100 if (bus_space_map(iot, ia->ia_iobase, MMS_NPORTS, 0, &ioh)) 101 return 0; 102 103 rv = 0; 104 105 /* Read identification register to see if present */ 106 if (bus_space_read_1(iot, ioh, MMS_IDENT) != 0xde) 107 goto out; 108 109 /* Seems it was there; reset. */ 110 bus_space_write_1(iot, ioh, MMS_ADDR, 0x87); 111 112 rv = 1; 113 ia->ia_iosize = MMS_NPORTS; 114 ia->ia_msize = 0; 115 116 out: 117 bus_space_unmap(iot, ioh, MMS_NPORTS); 118 return rv; 119 } 120 121 void 122 mmsattach(parent, self, aux) 123 struct device *parent, *self; 124 void *aux; 125 { 126 struct mms_softc *sc = (void *)self; 127 struct isa_attach_args *ia = aux; 128 bus_space_tag_t iot = ia->ia_iot; 129 bus_space_handle_t ioh; 130 131 printf("\n"); 132 133 if (bus_space_map(iot, ia->ia_iobase, MMS_NPORTS, 0, &ioh)) { 134 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 135 return; 136 } 137 138 /* Other initialization was done by mmsprobe. */ 139 sc->sc_iot = iot; 140 sc->sc_ioh = ioh; 141 sc->sc_state = 0; 142 143 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE, 144 IPL_TTY, mmsintr, sc); 145 } 146 147 int 148 mmsopen(dev, flag, mode, p) 149 dev_t dev; 150 int flag; 151 int mode; 152 struct proc *p; 153 { 154 int unit = MMSUNIT(dev); 155 struct mms_softc *sc; 156 157 if (unit >= mms_cd.cd_ndevs) 158 return ENXIO; 159 sc = mms_cd.cd_devs[unit]; 160 if (!sc) 161 return ENXIO; 162 163 if (sc->sc_state & MMS_OPEN) 164 return EBUSY; 165 166 if (clalloc(&sc->sc_q, MMS_BSIZE, 0) == -1) 167 return ENOMEM; 168 169 sc->sc_state |= MMS_OPEN; 170 sc->sc_status = 0; 171 sc->sc_x = sc->sc_y = 0; 172 173 /* Enable interrupts. */ 174 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x07); 175 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_DATA, 0x09); 176 177 return 0; 178 } 179 180 int 181 mmsclose(dev, flag, mode, p) 182 dev_t dev; 183 int flag; 184 int mode; 185 struct proc *p; 186 { 187 struct mms_softc *sc = mms_cd.cd_devs[MMSUNIT(dev)]; 188 189 /* Disable interrupts. */ 190 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x87); 191 192 sc->sc_state &= ~MMS_OPEN; 193 194 clfree(&sc->sc_q); 195 196 return 0; 197 } 198 199 int 200 mmsread(dev, uio, flag) 201 dev_t dev; 202 struct uio *uio; 203 int flag; 204 { 205 struct mms_softc *sc = mms_cd.cd_devs[MMSUNIT(dev)]; 206 int s; 207 int error = 0; 208 size_t length; 209 u_char buffer[MMS_CHUNK]; 210 211 /* Block until mouse activity occured. */ 212 213 s = spltty(); 214 while (sc->sc_q.c_cc == 0) { 215 if (flag & IO_NDELAY) { 216 splx(s); 217 return EWOULDBLOCK; 218 } 219 sc->sc_state |= MMS_ASLP; 220 error = tsleep((caddr_t)sc, PZERO | PCATCH, "mmsrea", 0); 221 if (error) { 222 sc->sc_state &= ~MMS_ASLP; 223 splx(s); 224 return error; 225 } 226 } 227 splx(s); 228 229 /* Transfer as many chunks as possible. */ 230 231 while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) { 232 length = min(sc->sc_q.c_cc, uio->uio_resid); 233 if (length > sizeof(buffer)) 234 length = sizeof(buffer); 235 236 /* Remove a small chunk from the input queue. */ 237 (void) q_to_b(&sc->sc_q, buffer, length); 238 239 /* Copy the data to the user process. */ 240 if ((error = uiomove(buffer, length, uio)) != 0) 241 break; 242 } 243 244 return error; 245 } 246 247 int 248 mmsioctl(dev, cmd, addr, flag, p) 249 dev_t dev; 250 u_long cmd; 251 caddr_t addr; 252 int flag; 253 struct proc *p; 254 { 255 struct mms_softc *sc = mms_cd.cd_devs[MMSUNIT(dev)]; 256 struct mouseinfo info; 257 int s; 258 int error; 259 260 switch (cmd) { 261 case MOUSEIOCREAD: 262 s = spltty(); 263 264 info.status = sc->sc_status; 265 if (sc->sc_x || sc->sc_y) 266 info.status |= MOVEMENT; 267 268 if (sc->sc_x > 127) 269 info.xmotion = 127; 270 else if (sc->sc_x < -127) 271 /* Bounding at -127 avoids a bug in XFree86. */ 272 info.xmotion = -127; 273 else 274 info.xmotion = sc->sc_x; 275 276 if (sc->sc_y > 127) 277 info.ymotion = 127; 278 else if (sc->sc_y < -127) 279 info.ymotion = -127; 280 else 281 info.ymotion = sc->sc_y; 282 283 /* Reset historical information. */ 284 sc->sc_x = sc->sc_y = 0; 285 sc->sc_status &= ~BUTCHNGMASK; 286 ndflush(&sc->sc_q, sc->sc_q.c_cc); 287 288 splx(s); 289 error = copyout(&info, addr, sizeof(struct mouseinfo)); 290 break; 291 292 default: 293 error = EINVAL; 294 break; 295 } 296 297 return error; 298 } 299 300 int 301 mmsintr(arg) 302 void *arg; 303 { 304 struct mms_softc *sc = arg; 305 bus_space_tag_t iot = sc->sc_iot; 306 bus_space_handle_t ioh = sc->sc_ioh; 307 u_char buttons, changed, status; 308 char dx, dy; 309 u_char buffer[5]; 310 311 if ((sc->sc_state & MMS_OPEN) == 0) 312 /* Interrupts are not expected. */ 313 return 0; 314 315 /* Freeze InPort registers (disabling interrupts). */ 316 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 317 bus_space_write_1(iot, ioh, MMS_DATA, 0x29); 318 319 bus_space_write_1(iot, ioh, MMS_ADDR, 0x00); 320 status = bus_space_read_1(iot, ioh, MMS_DATA); 321 322 if (status & 0x40) { 323 bus_space_write_1(iot, ioh, MMS_ADDR, 1); 324 dx = bus_space_read_1(iot, ioh, MMS_DATA); 325 dx = (dx == -128) ? -127 : dx; 326 bus_space_write_1(iot, ioh, MMS_ADDR, 2); 327 dy = bus_space_read_1(iot, ioh, MMS_DATA); 328 dy = (dy == -128) ? 127 : -dy; 329 } else 330 dx = dy = 0; 331 332 /* Unfreeze InPort registers (reenabling interrupts). */ 333 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 334 bus_space_write_1(iot, ioh, MMS_DATA, 0x09); 335 336 buttons = status & BUTSTATMASK; 337 changed = status & BUTCHNGMASK; 338 sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) | changed; 339 340 if (dx || dy || changed) { 341 /* Update accumulated movements. */ 342 sc->sc_x += dx; 343 sc->sc_y += dy; 344 345 /* Add this event to the queue. */ 346 buffer[0] = 0x80 | (buttons ^ BUTSTATMASK); 347 buffer[1] = dx; 348 buffer[2] = dy; 349 buffer[3] = buffer[4] = 0; 350 (void) b_to_q(buffer, sizeof buffer, &sc->sc_q); 351 352 if (sc->sc_state & MMS_ASLP) { 353 sc->sc_state &= ~MMS_ASLP; 354 wakeup((caddr_t)sc); 355 } 356 selwakeup(&sc->sc_rsel); 357 } 358 359 return -1; 360 } 361 362 int 363 mmspoll(dev, events, p) 364 dev_t dev; 365 int events; 366 struct proc *p; 367 { 368 struct mms_softc *sc = mms_cd.cd_devs[MMSUNIT(dev)]; 369 int revents = 0; 370 int s = spltty(); 371 372 if (events & (POLLIN | POLLRDNORM)) 373 if (sc->sc_q.c_cc > 0) 374 revents |= events & (POLLIN | POLLRDNORM); 375 else 376 selrecord(p, &sc->sc_rsel); 377 378 splx(s); 379 return (revents); 380 } 381
Indexes created Thu Nov 06 07:09:58 GMT 2025