lms.c revision 1.35
1 /* $NetBSD: lms.c,v 1.35 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/bus.h> 42 #include <machine/intr.h> 43 #include <machine/mouse.h> 44 #include <machine/conf.h> 45 46 #include <dev/isa/isavar.h> 47 48 #define LMS_DATA 0 /* offset for data port, read-only */ 49 #define LMS_SIGN 1 /* offset for signature port, read-write */ 50 #define LMS_INTR 2 /* offset for interrupt port, read-only */ 51 #define LMS_CNTRL 2 /* offset for control port, write-only */ 52 #define LMS_CONFIG 3 /* for configuration port, read-write */ 53 #define LMS_NPORTS 4 54 55 #define LMS_CHUNK 128 /* chunk size for read */ 56 #define LMS_BSIZE 1020 /* buffer size */ 57 58 struct lms_softc { /* driver status information */ 59 struct device sc_dev; 60 void *sc_ih; 61 62 bus_space_tag_t sc_iot; /* bus i/o space identifier */ 63 bus_space_handle_t sc_ioh; /* bus i/o handle */ 64 65 struct clist sc_q; 66 struct selinfo sc_rsel; 67 u_char sc_state; /* mouse driver state */ 68 #define LMS_OPEN 0x01 /* device is open */ 69 #define LMS_ASLP 0x02 /* waiting for mouse data */ 70 u_char sc_status; /* mouse button status */ 71 int sc_x, sc_y; /* accumulated motion in the X,Y axis */ 72 }; 73 74 int lmsprobe __P((struct device *, struct cfdata *, void *)); 75 void lmsattach __P((struct device *, struct device *, void *)); 76 int lmsintr __P((void *)); 77 78 struct cfattach lms_ca = { 79 sizeof(struct lms_softc), lmsprobe, lmsattach 80 }; 81 82 extern struct cfdriver lms_cd; 83 84 #define LMSUNIT(dev) (minor(dev)) 85 86 int 87 lmsprobe(parent, match, aux) 88 struct device *parent; 89 struct cfdata *match; 90 void *aux; 91 { 92 struct isa_attach_args *ia = aux; 93 bus_space_tag_t iot = ia->ia_iot; 94 bus_space_handle_t ioh; 95 int rv; 96 97 /* Disallow wildcarded i/o base. */ 98 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 99 return 0; 100 101 /* Map the i/o space. */ 102 if (bus_space_map(iot, ia->ia_iobase, LMS_NPORTS, 0, &ioh)) 103 return 0; 104 105 rv = 0; 106 107 /* Configure and check for port present. */ 108 bus_space_write_1(iot, ioh, LMS_CONFIG, 0x91); 109 delay(10); 110 bus_space_write_1(iot, ioh, LMS_SIGN, 0x0c); 111 delay(10); 112 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x0c) 113 goto out; 114 bus_space_write_1(iot, ioh, LMS_SIGN, 0x50); 115 delay(10); 116 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x50) 117 goto out; 118 119 /* Disable interrupts. */ 120 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x10); 121 122 rv = 1; 123 ia->ia_iosize = LMS_NPORTS; 124 ia->ia_msize = 0; 125 126 out: 127 bus_space_unmap(iot, ioh, LMS_NPORTS); 128 return rv; 129 } 130 131 void 132 lmsattach(parent, self, aux) 133 struct device *parent, *self; 134 void *aux; 135 { 136 struct lms_softc *sc = (void *)self; 137 struct isa_attach_args *ia = aux; 138 bus_space_tag_t iot = ia->ia_iot; 139 bus_space_handle_t ioh; 140 141 printf("\n"); 142 143 if (bus_space_map(iot, ia->ia_iobase, LMS_NPORTS, 0, &ioh)) { 144 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 145 return; 146 } 147 148 /* Other initialization was done by lmsprobe. */ 149 sc->sc_iot = iot; 150 sc->sc_ioh = ioh; 151 sc->sc_state = 0; 152 153 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE, 154 IPL_TTY, lmsintr, sc); 155 } 156 157 int 158 lmsopen(dev, flag, mode, p) 159 dev_t dev; 160 int flag; 161 int mode; 162 struct proc *p; 163 { 164 int unit = LMSUNIT(dev); 165 struct lms_softc *sc; 166 167 if (unit >= lms_cd.cd_ndevs) 168 return ENXIO; 169 sc = lms_cd.cd_devs[unit]; 170 if (!sc) 171 return ENXIO; 172 173 if (sc->sc_state & LMS_OPEN) 174 return EBUSY; 175 176 if (clalloc(&sc->sc_q, LMS_BSIZE, 0) == -1) 177 return ENOMEM; 178 179 sc->sc_state |= LMS_OPEN; 180 sc->sc_status = 0; 181 sc->sc_x = sc->sc_y = 0; 182 183 /* Enable interrupts. */ 184 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0); 185 186 return 0; 187 } 188 189 int 190 lmsclose(dev, flag, mode, p) 191 dev_t dev; 192 int flag; 193 int mode; 194 struct proc *p; 195 { 196 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 197 198 /* Disable interrupts. */ 199 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0x10); 200 201 sc->sc_state &= ~LMS_OPEN; 202 203 clfree(&sc->sc_q); 204 205 return 0; 206 } 207 208 int 209 lmsread(dev, uio, flag) 210 dev_t dev; 211 struct uio *uio; 212 int flag; 213 { 214 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 215 int s; 216 int error = 0; 217 size_t length; 218 u_char buffer[LMS_CHUNK]; 219 220 /* Block until mouse activity occured. */ 221 222 s = spltty(); 223 while (sc->sc_q.c_cc == 0) { 224 if (flag & IO_NDELAY) { 225 splx(s); 226 return EWOULDBLOCK; 227 } 228 sc->sc_state |= LMS_ASLP; 229 error = tsleep((caddr_t)sc, PZERO | PCATCH, "lmsrea", 0); 230 if (error) { 231 sc->sc_state &= ~LMS_ASLP; 232 splx(s); 233 return error; 234 } 235 } 236 splx(s); 237 238 /* Transfer as many chunks as possible. */ 239 240 while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) { 241 length = min(sc->sc_q.c_cc, uio->uio_resid); 242 if (length > sizeof(buffer)) 243 length = sizeof(buffer); 244 245 /* Remove a small chunk from the input queue. */ 246 (void) q_to_b(&sc->sc_q, buffer, length); 247 248 /* Copy the data to the user process. */ 249 if ((error = uiomove(buffer, length, uio)) != 0) 250 break; 251 } 252 253 return error; 254 } 255 256 int 257 lmsioctl(dev, cmd, addr, flag, p) 258 dev_t dev; 259 u_long cmd; 260 caddr_t addr; 261 int flag; 262 struct proc *p; 263 { 264 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 265 struct mouseinfo info; 266 int s; 267 int error; 268 269 switch (cmd) { 270 case MOUSEIOCREAD: 271 s = spltty(); 272 273 info.status = sc->sc_status; 274 if (sc->sc_x || sc->sc_y) 275 info.status |= MOVEMENT; 276 277 if (sc->sc_x > 127) 278 info.xmotion = 127; 279 else if (sc->sc_x < -127) 280 /* Bounding at -127 avoids a bug in XFree86. */ 281 info.xmotion = -127; 282 else 283 info.xmotion = sc->sc_x; 284 285 if (sc->sc_y > 127) 286 info.ymotion = 127; 287 else if (sc->sc_y < -127) 288 info.ymotion = -127; 289 else 290 info.ymotion = sc->sc_y; 291 292 /* Reset historical information. */ 293 sc->sc_x = sc->sc_y = 0; 294 sc->sc_status &= ~BUTCHNGMASK; 295 ndflush(&sc->sc_q, sc->sc_q.c_cc); 296 297 splx(s); 298 error = copyout(&info, addr, sizeof(struct mouseinfo)); 299 break; 300 301 default: 302 error = EINVAL; 303 break; 304 } 305 306 return error; 307 } 308 309 int 310 lmsintr(arg) 311 void *arg; 312 { 313 struct lms_softc *sc = arg; 314 bus_space_tag_t iot = sc->sc_iot; 315 bus_space_handle_t ioh = sc->sc_ioh; 316 u_char hi, lo, buttons, changed; 317 char dx, dy; 318 u_char buffer[5]; 319 320 if ((sc->sc_state & LMS_OPEN) == 0) 321 /* Interrupts are not expected. */ 322 return 0; 323 324 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xab); 325 hi = bus_space_read_1(iot, ioh, LMS_DATA); 326 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x90); 327 lo = bus_space_read_1(iot, ioh, LMS_DATA); 328 dx = ((hi & 0x0f) << 4) | (lo & 0x0f); 329 /* Bounding at -127 avoids a bug in XFree86. */ 330 dx = (dx == -128) ? -127 : dx; 331 332 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xf0); 333 hi = bus_space_read_1(iot, ioh, LMS_DATA); 334 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xd0); 335 lo = bus_space_read_1(iot, ioh, LMS_DATA); 336 dy = ((hi & 0x0f) << 4) | (lo & 0x0f); 337 dy = (dy == -128) ? 127 : -dy; 338 339 bus_space_write_1(iot, ioh, LMS_CNTRL, 0); 340 341 buttons = (~hi >> 5) & 0x07; 342 changed = ((buttons ^ sc->sc_status) & 0x07) << 3; 343 sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) | changed; 344 345 if (dx || dy || changed) { 346 /* Update accumulated movements. */ 347 sc->sc_x += dx; 348 sc->sc_y += dy; 349 350 /* Add this event to the queue. */ 351 buffer[0] = 0x80 | (buttons ^ BUTSTATMASK); 352 buffer[1] = dx; 353 buffer[2] = dy; 354 buffer[3] = buffer[4] = 0; 355 (void) b_to_q(buffer, sizeof buffer, &sc->sc_q); 356 357 if (sc->sc_state & LMS_ASLP) { 358 sc->sc_state &= ~LMS_ASLP; 359 wakeup((caddr_t)sc); 360 } 361 selwakeup(&sc->sc_rsel); 362 } 363 364 return -1; 365 } 366 367 int 368 lmspoll(dev, events, p) 369 dev_t dev; 370 int events; 371 struct proc *p; 372 { 373 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 374 int revents = 0; 375 int s = spltty(); 376 377 if (events & (POLLIN | POLLRDNORM)) 378 if (sc->sc_q.c_cc > 0) 379 revents |= events & (POLLIN | POLLRDNORM); 380 else 381 selrecord(p, &sc->sc_rsel); 382 383 splx(s); 384 return (revents); 385 } 386
Indexes created Thu Nov 06 07:09:58 GMT 2025