mms.c revision 1.29
1 /* $NetBSD: mms.c,v 1.29 1997/10/19 20:31:32 mycroft 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; 95 96 /* Disallow wildcarded i/o address. */ 97 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 98 return 0; 99 100 /* Map the i/o space. */ 101 if (bus_space_map(iot, ia->ia_iobase, MMS_NPORTS, 0, &ioh)) 102 return 0; 103 104 rv = 0; 105 106 /* Read identification register to see if present */ 107 if (bus_space_read_1(iot, ioh, MMS_IDENT) != 0xde) 108 goto out; 109 110 /* Seems it was there; reset. */ 111 bus_space_write_1(iot, ioh, MMS_ADDR, 0x87); 112 113 rv = 1; 114 ia->ia_iosize = MMS_NPORTS; 115 ia->ia_msize = 0; 116 117 out: 118 bus_space_unmap(iot, ioh, MMS_NPORTS); 119 return rv; 120 } 121 122 void 123 mmsattach(parent, self, aux) 124 struct device *parent, *self; 125 void *aux; 126 { 127 struct mms_softc *sc = (void *)self; 128 struct isa_attach_args *ia = aux; 129 bus_space_tag_t iot = ia->ia_iot; 130 bus_space_handle_t ioh; 131 132 printf("\n"); 133 134 if (bus_space_map(iot, ia->ia_iobase, MMS_NPORTS, 0, &ioh)) { 135 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 136 return; 137 } 138 139 /* Other initialization was done by mmsprobe. */ 140 sc->sc_iot = iot; 141 sc->sc_ioh = ioh; 142 sc->sc_state = 0; 143 144 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE, 145 IPL_TTY, mmsintr, sc); 146 } 147 148 int 149 mmsopen(dev, flag, mode, p) 150 dev_t dev; 151 int flag; 152 int mode; 153 struct proc *p; 154 { 155 int unit = MMSUNIT(dev); 156 struct mms_softc *sc; 157 158 if (unit >= mms_cd.cd_ndevs) 159 return ENXIO; 160 sc = mms_cd.cd_devs[unit]; 161 if (!sc) 162 return ENXIO; 163 164 if (sc->sc_state & MMS_OPEN) 165 return EBUSY; 166 167 if (clalloc(&sc->sc_q, MMS_BSIZE, 0) == -1) 168 return ENOMEM; 169 170 sc->sc_state |= MMS_OPEN; 171 sc->sc_status = 0; 172 sc->sc_x = sc->sc_y = 0; 173 174 /* Enable interrupts. */ 175 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x07); 176 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_DATA, 0x09); 177 178 return 0; 179 } 180 181 int 182 mmsclose(dev, flag, mode, p) 183 dev_t dev; 184 int flag; 185 int mode; 186 struct proc *p; 187 { 188 struct mms_softc *sc = mms_cd.cd_devs[MMSUNIT(dev)]; 189 190 /* Disable interrupts. */ 191 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x87); 192 193 sc->sc_state &= ~MMS_OPEN; 194 195 clfree(&sc->sc_q); 196 197 return 0; 198 } 199 200 int 201 mmsread(dev, uio, flag) 202 dev_t dev; 203 struct uio *uio; 204 int flag; 205 { 206 struct mms_softc *sc = mms_cd.cd_devs[MMSUNIT(dev)]; 207 int s; 208 int error = 0; 209 size_t length; 210 u_char buffer[MMS_CHUNK]; 211 212 /* Block until mouse activity occured. */ 213 214 s = spltty(); 215 while (sc->sc_q.c_cc == 0) { 216 if (flag & IO_NDELAY) { 217 splx(s); 218 return EWOULDBLOCK; 219 } 220 sc->sc_state |= MMS_ASLP; 221 error = tsleep((caddr_t)sc, PZERO | PCATCH, "mmsrea", 0); 222 if (error) { 223 sc->sc_state &= ~MMS_ASLP; 224 splx(s); 225 return error; 226 } 227 } 228 splx(s); 229 230 /* Transfer as many chunks as possible. */ 231 232 while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) { 233 length = min(sc->sc_q.c_cc, uio->uio_resid); 234 if (length > sizeof(buffer)) 235 length = sizeof(buffer); 236 237 /* Remove a small chunk from the input queue. */ 238 (void) q_to_b(&sc->sc_q, buffer, length); 239 240 /* Copy the data to the user process. */ 241 if ((error = uiomove(buffer, length, uio)) != 0) 242 break; 243 } 244 245 return error; 246 } 247 248 int 249 mmsioctl(dev, cmd, addr, flag, p) 250 dev_t dev; 251 u_long cmd; 252 caddr_t addr; 253 int flag; 254 struct proc *p; 255 { 256 struct mms_softc *sc = mms_cd.cd_devs[MMSUNIT(dev)]; 257 struct mouseinfo info; 258 int s; 259 int error; 260 261 switch (cmd) { 262 case MOUSEIOCREAD: 263 s = spltty(); 264 265 info.status = sc->sc_status; 266 if (sc->sc_x || sc->sc_y) 267 info.status |= MOVEMENT; 268 269 if (sc->sc_x > 127) 270 info.xmotion = 127; 271 else if (sc->sc_x < -127) 272 /* Bounding at -127 avoids a bug in XFree86. */ 273 info.xmotion = -127; 274 else 275 info.xmotion = sc->sc_x; 276 277 if (sc->sc_y > 127) 278 info.ymotion = 127; 279 else if (sc->sc_y < -127) 280 info.ymotion = -127; 281 else 282 info.ymotion = sc->sc_y; 283 284 /* Reset historical information. */ 285 sc->sc_x = sc->sc_y = 0; 286 sc->sc_status &= ~BUTCHNGMASK; 287 ndflush(&sc->sc_q, sc->sc_q.c_cc); 288 289 splx(s); 290 error = copyout(&info, addr, sizeof(struct mouseinfo)); 291 break; 292 293 default: 294 error = EINVAL; 295 break; 296 } 297 298 return error; 299 } 300 301 int 302 mmsintr(arg) 303 void *arg; 304 { 305 struct mms_softc *sc = arg; 306 bus_space_tag_t iot = sc->sc_iot; 307 bus_space_handle_t ioh = sc->sc_ioh; 308 u_char buttons, changed, status; 309 char dx, dy; 310 u_char buffer[5]; 311 312 if ((sc->sc_state & MMS_OPEN) == 0) 313 /* Interrupts are not expected. */ 314 return 0; 315 316 /* Freeze InPort registers (disabling interrupts). */ 317 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 318 bus_space_write_1(iot, ioh, MMS_DATA, 0x29); 319 320 bus_space_write_1(iot, ioh, MMS_ADDR, 0x00); 321 status = bus_space_read_1(iot, ioh, MMS_DATA); 322 323 if (status & 0x40) { 324 bus_space_write_1(iot, ioh, MMS_ADDR, 1); 325 dx = bus_space_read_1(iot, ioh, MMS_DATA); 326 dx = (dx == -128) ? -127 : dx; 327 bus_space_write_1(iot, ioh, MMS_ADDR, 2); 328 dy = bus_space_read_1(iot, ioh, MMS_DATA); 329 dy = (dy == -128) ? 127 : -dy; 330 } else 331 dx = dy = 0; 332 333 /* Unfreeze InPort registers (reenabling interrupts). */ 334 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 335 bus_space_write_1(iot, ioh, MMS_DATA, 0x09); 336 337 buttons = status & BUTSTATMASK; 338 changed = status & BUTCHNGMASK; 339 sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) | changed; 340 341 if (dx || dy || changed) { 342 /* Update accumulated movements. */ 343 sc->sc_x += dx; 344 sc->sc_y += dy; 345 346 /* Add this event to the queue. */ 347 buffer[0] = 0x80 | (buttons ^ BUTSTATMASK); 348 buffer[1] = dx; 349 buffer[2] = dy; 350 buffer[3] = buffer[4] = 0; 351 (void) b_to_q(buffer, sizeof buffer, &sc->sc_q); 352 353 if (sc->sc_state & MMS_ASLP) { 354 sc->sc_state &= ~MMS_ASLP; 355 wakeup((caddr_t)sc); 356 } 357 selwakeup(&sc->sc_rsel); 358 } 359 360 return -1; 361 } 362 363 int 364 mmspoll(dev, events, p) 365 dev_t dev; 366 int events; 367 struct proc *p; 368 { 369 struct mms_softc *sc = mms_cd.cd_devs[MMSUNIT(dev)]; 370 int revents = 0; 371 int s = spltty(); 372 373 if (events & (POLLIN | POLLRDNORM)) 374 if (sc->sc_q.c_cc > 0) 375 revents |= events & (POLLIN | POLLRDNORM); 376 else 377 selrecord(p, &sc->sc_rsel); 378 379 splx(s); 380 return (revents); 381 } 382
Indexes created Thu Nov 06 07:09:58 GMT 2025