mms.c revision 1.28
1 /* $NetBSD: mms.c,v 1.28 1997/10/19 19:17:07 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1993, 1994 Charles 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 *, void *, 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 struct cfdriver mms_cd = { 81 NULL, "mms", DV_TTY 82 }; 83 84 #define MMSUNIT(dev) (minor(dev)) 85 86 int 87 mmsprobe(parent, match, aux) 88 struct device *parent; 89 void *match, *aux; 90 { 91 struct isa_attach_args *ia = aux; 92 bus_space_tag_t iot = ia->ia_iot; 93 bus_space_handle_t ioh; 94 int rv = 0; 95 96 /* Disallow wildcarded i/o address. */ 97 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 98 return 0; 99 100 if (bus_space_map(iot, ia->ia_iobase, MMS_NPORTS, 0, &ioh)) 101 return 0; 102 103 /* Read identification register to see if present */ 104 if (bus_space_read_1(iot, ioh, MMS_IDENT) != 0xde) 105 goto out; 106 107 /* Seems it was there; reset. */ 108 bus_space_write_1(iot, ioh, MMS_ADDR, 0x87); 109 110 rv = 1; 111 ia->ia_iosize = MMS_NPORTS; 112 ia->ia_msize = 0; 113 out: 114 bus_space_unmap(iot, ioh, MMS_NPORTS); 115 return rv; 116 } 117 118 void 119 mmsattach(parent, self, aux) 120 struct device *parent, *self; 121 void *aux; 122 { 123 struct mms_softc *sc = (void *)self; 124 struct isa_attach_args *ia = aux; 125 bus_space_tag_t iot = ia->ia_iot; 126 bus_space_handle_t ioh; 127 128 printf("\n"); 129 130 if (bus_space_map(iot, ia->ia_iobase, MMS_NPORTS, 0, &ioh)) { 131 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 132 return; 133 } 134 135 /* Other initialization was done by mmsprobe. */ 136 sc->sc_iot = iot; 137 sc->sc_ioh = ioh; 138 sc->sc_state = 0; 139 140 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE, 141 IPL_TTY, mmsintr, sc); 142 } 143 144 int 145 mmsopen(dev, flag, mode, p) 146 dev_t dev; 147 int flag; 148 int mode; 149 struct proc *p; 150 { 151 int unit = MMSUNIT(dev); 152 struct mms_softc *sc; 153 154 if (unit >= mms_cd.cd_ndevs) 155 return ENXIO; 156 sc = mms_cd.cd_devs[unit]; 157 if (!sc) 158 return ENXIO; 159 160 if (sc->sc_state & MMS_OPEN) 161 return EBUSY; 162 163 if (clalloc(&sc->sc_q, MMS_BSIZE, 0) == -1) 164 return ENOMEM; 165 166 sc->sc_state |= MMS_OPEN; 167 sc->sc_status = 0; 168 sc->sc_x = sc->sc_y = 0; 169 170 /* Enable interrupts. */ 171 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x07); 172 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_DATA, 0x09); 173 174 return 0; 175 } 176 177 int 178 mmsclose(dev, flag, mode, p) 179 dev_t dev; 180 int flag; 181 int mode; 182 struct proc *p; 183 { 184 struct mms_softc *sc = mms_cd.cd_devs[MMSUNIT(dev)]; 185 186 /* Disable interrupts. */ 187 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x87); 188 189 sc->sc_state &= ~MMS_OPEN; 190 191 clfree(&sc->sc_q); 192 193 return 0; 194 } 195 196 int 197 mmsread(dev, uio, flag) 198 dev_t dev; 199 struct uio *uio; 200 int flag; 201 { 202 struct mms_softc *sc = mms_cd.cd_devs[MMSUNIT(dev)]; 203 int s; 204 int error = 0; 205 size_t length; 206 u_char buffer[MMS_CHUNK]; 207 208 /* Block until mouse activity occured. */ 209 210 s = spltty(); 211 while (sc->sc_q.c_cc == 0) { 212 if (flag & IO_NDELAY) { 213 splx(s); 214 return EWOULDBLOCK; 215 } 216 sc->sc_state |= MMS_ASLP; 217 error = tsleep((caddr_t)sc, PZERO | PCATCH, "mmsrea", 0); 218 if (error) { 219 sc->sc_state &= ~MMS_ASLP; 220 splx(s); 221 return error; 222 } 223 } 224 splx(s); 225 226 /* Transfer as many chunks as possible. */ 227 228 while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) { 229 length = min(sc->sc_q.c_cc, uio->uio_resid); 230 if (length > sizeof(buffer)) 231 length = sizeof(buffer); 232 233 /* Remove a small chunk from the input queue. */ 234 (void) q_to_b(&sc->sc_q, buffer, length); 235 236 /* Copy the data to the user process. */ 237 if ((error = uiomove(buffer, length, uio)) != 0) 238 break; 239 } 240 241 return error; 242 } 243 244 int 245 mmsioctl(dev, cmd, addr, flag, p) 246 dev_t dev; 247 u_long cmd; 248 caddr_t addr; 249 int flag; 250 struct proc *p; 251 { 252 struct mms_softc *sc = mms_cd.cd_devs[MMSUNIT(dev)]; 253 struct mouseinfo info; 254 int s; 255 int error; 256 257 switch (cmd) { 258 case MOUSEIOCREAD: 259 s = spltty(); 260 261 info.status = sc->sc_status; 262 if (sc->sc_x || sc->sc_y) 263 info.status |= MOVEMENT; 264 265 if (sc->sc_x > 127) 266 info.xmotion = 127; 267 else if (sc->sc_x < -127) 268 /* Bounding at -127 avoids a bug in XFree86. */ 269 info.xmotion = -127; 270 else 271 info.xmotion = sc->sc_x; 272 273 if (sc->sc_y > 127) 274 info.ymotion = 127; 275 else if (sc->sc_y < -127) 276 info.ymotion = -127; 277 else 278 info.ymotion = sc->sc_y; 279 280 /* Reset historical information. */ 281 sc->sc_x = sc->sc_y = 0; 282 sc->sc_status &= ~BUTCHNGMASK; 283 ndflush(&sc->sc_q, sc->sc_q.c_cc); 284 285 splx(s); 286 error = copyout(&info, addr, sizeof(struct mouseinfo)); 287 break; 288 289 default: 290 error = EINVAL; 291 break; 292 } 293 294 return error; 295 } 296 297 int 298 mmsintr(arg) 299 void *arg; 300 { 301 struct mms_softc *sc = arg; 302 u_char buttons, changed, status; 303 char dx, dy; 304 u_char buffer[5]; 305 bus_space_tag_t iot = sc->sc_iot; 306 bus_space_handle_t ioh = sc->sc_ioh; 307 308 if ((sc->sc_state & MMS_OPEN) == 0) 309 /* Interrupts are not expected. */ 310 return 0; 311 312 /* Freeze InPort registers (disabling interrupts). */ 313 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 314 bus_space_write_1(iot, ioh, MMS_DATA, 0x29); 315 316 bus_space_write_1(iot, ioh, MMS_ADDR, 0x00); 317 status = bus_space_read_1(iot, ioh, MMS_DATA); 318 319 if (status & 0x40) { 320 bus_space_write_1(iot, ioh, MMS_ADDR, 1); 321 dx = bus_space_read_1(iot, ioh, MMS_DATA); 322 dx = (dx == -128) ? -127 : dx; 323 bus_space_write_1(iot, ioh, MMS_ADDR, 2); 324 dy = bus_space_read_1(iot, ioh, MMS_DATA); 325 dy = (dy == -128) ? 127 : -dy; 326 } else 327 dx = dy = 0; 328 329 /* Unfreeze InPort registers (reenabling interrupts). */ 330 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 331 bus_space_write_1(iot, ioh, MMS_DATA, 0x09); 332 333 buttons = status & BUTSTATMASK; 334 changed = status & BUTCHNGMASK; 335 sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) | changed; 336 337 if (dx || dy || changed) { 338 /* Update accumulated movements. */ 339 sc->sc_x += dx; 340 sc->sc_y += dy; 341 342 /* Add this event to the queue. */ 343 buffer[0] = 0x80 | (buttons ^ BUTSTATMASK); 344 buffer[1] = dx; 345 buffer[2] = dy; 346 buffer[3] = buffer[4] = 0; 347 (void) b_to_q(buffer, sizeof buffer, &sc->sc_q); 348 349 if (sc->sc_state & MMS_ASLP) { 350 sc->sc_state &= ~MMS_ASLP; 351 wakeup((caddr_t)sc); 352 } 353 selwakeup(&sc->sc_rsel); 354 } 355 356 return -1; 357 } 358 359 int 360 mmspoll(dev, events, p) 361 dev_t dev; 362 int events; 363 struct proc *p; 364 { 365 struct mms_softc *sc = mms_cd.cd_devs[MMSUNIT(dev)]; 366 int revents = 0; 367 int s = spltty(); 368 369 if (events & (POLLIN | POLLRDNORM)) 370 if (sc->sc_q.c_cc > 0) 371 revents |= events & (POLLIN | POLLRDNORM); 372 else 373 selrecord(p, &sc->sc_rsel); 374 375 splx(s); 376 return (revents); 377 } 378
Indexes created Thu Nov 06 07:09:58 GMT 2025