mms.c revision 1.30
1 /* $NetBSD: mms.c,v 1.30 1998/01/12 18:59:14 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 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 void *match, *aux; 88 { 89 struct isa_attach_args *ia = aux; 90 bus_space_tag_t iot = ia->ia_iot; 91 bus_space_handle_t ioh; 92 int rv; 93 94 /* Disallow wildcarded i/o address. */ 95 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 96 return 0; 97 98 /* Map the i/o space. */ 99 if (bus_space_map(iot, ia->ia_iobase, MMS_NPORTS, 0, &ioh)) 100 return 0; 101 102 rv = 0; 103 104 /* Read identification register to see if present */ 105 if (bus_space_read_1(iot, ioh, MMS_IDENT) != 0xde) 106 goto out; 107 108 /* Seems it was there; reset. */ 109 bus_space_write_1(iot, ioh, MMS_ADDR, 0x87); 110 111 rv = 1; 112 ia->ia_iosize = MMS_NPORTS; 113 ia->ia_msize = 0; 114 115 out: 116 bus_space_unmap(iot, ioh, MMS_NPORTS); 117 return rv; 118 } 119 120 void 121 mmsattach(parent, self, aux) 122 struct device *parent, *self; 123 void *aux; 124 { 125 struct mms_softc *sc = (void *)self; 126 struct isa_attach_args *ia = aux; 127 bus_space_tag_t iot = ia->ia_iot; 128 bus_space_handle_t ioh; 129 130 printf("\n"); 131 132 if (bus_space_map(iot, ia->ia_iobase, MMS_NPORTS, 0, &ioh)) { 133 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 134 return; 135 } 136 137 /* Other initialization was done by mmsprobe. */ 138 sc->sc_iot = iot; 139 sc->sc_ioh = ioh; 140 sc->sc_state = 0; 141 142 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE, 143 IPL_TTY, mmsintr, sc); 144 } 145 146 int 147 mmsopen(dev, flag, mode, p) 148 dev_t dev; 149 int flag; 150 int mode; 151 struct proc *p; 152 { 153 int unit = MMSUNIT(dev); 154 struct mms_softc *sc; 155 156 if (unit >= mms_cd.cd_ndevs) 157 return ENXIO; 158 sc = mms_cd.cd_devs[unit]; 159 if (!sc) 160 return ENXIO; 161 162 if (sc->sc_state & MMS_OPEN) 163 return EBUSY; 164 165 if (clalloc(&sc->sc_q, MMS_BSIZE, 0) == -1) 166 return ENOMEM; 167 168 sc->sc_state |= MMS_OPEN; 169 sc->sc_status = 0; 170 sc->sc_x = sc->sc_y = 0; 171 172 /* Enable interrupts. */ 173 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x07); 174 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_DATA, 0x09); 175 176 return 0; 177 } 178 179 int 180 mmsclose(dev, flag, mode, p) 181 dev_t dev; 182 int flag; 183 int mode; 184 struct proc *p; 185 { 186 struct mms_softc *sc = mms_cd.cd_devs[MMSUNIT(dev)]; 187 188 /* Disable interrupts. */ 189 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x87); 190 191 sc->sc_state &= ~MMS_OPEN; 192 193 clfree(&sc->sc_q); 194 195 return 0; 196 } 197 198 int 199 mmsread(dev, uio, flag) 200 dev_t dev; 201 struct uio *uio; 202 int flag; 203 { 204 struct mms_softc *sc = mms_cd.cd_devs[MMSUNIT(dev)]; 205 int s; 206 int error = 0; 207 size_t length; 208 u_char buffer[MMS_CHUNK]; 209 210 /* Block until mouse activity occured. */ 211 212 s = spltty(); 213 while (sc->sc_q.c_cc == 0) { 214 if (flag & IO_NDELAY) { 215 splx(s); 216 return EWOULDBLOCK; 217 } 218 sc->sc_state |= MMS_ASLP; 219 error = tsleep((caddr_t)sc, PZERO | PCATCH, "mmsrea", 0); 220 if (error) { 221 sc->sc_state &= ~MMS_ASLP; 222 splx(s); 223 return error; 224 } 225 } 226 splx(s); 227 228 /* Transfer as many chunks as possible. */ 229 230 while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) { 231 length = min(sc->sc_q.c_cc, uio->uio_resid); 232 if (length > sizeof(buffer)) 233 length = sizeof(buffer); 234 235 /* Remove a small chunk from the input queue. */ 236 (void) q_to_b(&sc->sc_q, buffer, length); 237 238 /* Copy the data to the user process. */ 239 if ((error = uiomove(buffer, length, uio)) != 0) 240 break; 241 } 242 243 return error; 244 } 245 246 int 247 mmsioctl(dev, cmd, addr, flag, p) 248 dev_t dev; 249 u_long cmd; 250 caddr_t addr; 251 int flag; 252 struct proc *p; 253 { 254 struct mms_softc *sc = mms_cd.cd_devs[MMSUNIT(dev)]; 255 struct mouseinfo info; 256 int s; 257 int error; 258 259 switch (cmd) { 260 case MOUSEIOCREAD: 261 s = spltty(); 262 263 info.status = sc->sc_status; 264 if (sc->sc_x || sc->sc_y) 265 info.status |= MOVEMENT; 266 267 if (sc->sc_x > 127) 268 info.xmotion = 127; 269 else if (sc->sc_x < -127) 270 /* Bounding at -127 avoids a bug in XFree86. */ 271 info.xmotion = -127; 272 else 273 info.xmotion = sc->sc_x; 274 275 if (sc->sc_y > 127) 276 info.ymotion = 127; 277 else if (sc->sc_y < -127) 278 info.ymotion = -127; 279 else 280 info.ymotion = sc->sc_y; 281 282 /* Reset historical information. */ 283 sc->sc_x = sc->sc_y = 0; 284 sc->sc_status &= ~BUTCHNGMASK; 285 ndflush(&sc->sc_q, sc->sc_q.c_cc); 286 287 splx(s); 288 error = copyout(&info, addr, sizeof(struct mouseinfo)); 289 break; 290 291 default: 292 error = EINVAL; 293 break; 294 } 295 296 return error; 297 } 298 299 int 300 mmsintr(arg) 301 void *arg; 302 { 303 struct mms_softc *sc = arg; 304 bus_space_tag_t iot = sc->sc_iot; 305 bus_space_handle_t ioh = sc->sc_ioh; 306 u_char buttons, changed, status; 307 char dx, dy; 308 u_char buffer[5]; 309 310 if ((sc->sc_state & MMS_OPEN) == 0) 311 /* Interrupts are not expected. */ 312 return 0; 313 314 /* Freeze InPort registers (disabling interrupts). */ 315 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 316 bus_space_write_1(iot, ioh, MMS_DATA, 0x29); 317 318 bus_space_write_1(iot, ioh, MMS_ADDR, 0x00); 319 status = bus_space_read_1(iot, ioh, MMS_DATA); 320 321 if (status & 0x40) { 322 bus_space_write_1(iot, ioh, MMS_ADDR, 1); 323 dx = bus_space_read_1(iot, ioh, MMS_DATA); 324 dx = (dx == -128) ? -127 : dx; 325 bus_space_write_1(iot, ioh, MMS_ADDR, 2); 326 dy = bus_space_read_1(iot, ioh, MMS_DATA); 327 dy = (dy == -128) ? 127 : -dy; 328 } else 329 dx = dy = 0; 330 331 /* Unfreeze InPort registers (reenabling interrupts). */ 332 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 333 bus_space_write_1(iot, ioh, MMS_DATA, 0x09); 334 335 buttons = status & BUTSTATMASK; 336 changed = status & BUTCHNGMASK; 337 sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) | changed; 338 339 if (dx || dy || changed) { 340 /* Update accumulated movements. */ 341 sc->sc_x += dx; 342 sc->sc_y += dy; 343 344 /* Add this event to the queue. */ 345 buffer[0] = 0x80 | (buttons ^ BUTSTATMASK); 346 buffer[1] = dx; 347 buffer[2] = dy; 348 buffer[3] = buffer[4] = 0; 349 (void) b_to_q(buffer, sizeof buffer, &sc->sc_q); 350 351 if (sc->sc_state & MMS_ASLP) { 352 sc->sc_state &= ~MMS_ASLP; 353 wakeup((caddr_t)sc); 354 } 355 selwakeup(&sc->sc_rsel); 356 } 357 358 return -1; 359 } 360 361 int 362 mmspoll(dev, events, p) 363 dev_t dev; 364 int events; 365 struct proc *p; 366 { 367 struct mms_softc *sc = mms_cd.cd_devs[MMSUNIT(dev)]; 368 int revents = 0; 369 int s = spltty(); 370 371 if (events & (POLLIN | POLLRDNORM)) 372 if (sc->sc_q.c_cc > 0) 373 revents |= events & (POLLIN | POLLRDNORM); 374 else 375 selrecord(p, &sc->sc_rsel); 376 377 splx(s); 378 return (revents); 379 } 380
Indexes created Thu Nov 06 07:09:58 GMT 2025