lms.c revision 1.32
1 /* $NetBSD: lms.c,v 1.32 1997/10/19 20:31:29 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/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 *, void *, 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 struct cfdriver lms_cd = { 83 NULL, "lms", DV_TTY 84 }; 85 86 #define LMSUNIT(dev) (minor(dev)) 87 88 int 89 lmsprobe(parent, match, aux) 90 struct device *parent; 91 void *match, *aux; 92 { 93 struct isa_attach_args *ia = aux; 94 bus_space_tag_t iot = ia->ia_iot; 95 bus_space_handle_t ioh; 96 int rv; 97 98 /* Disallow wildcarded i/o base. */ 99 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 100 return 0; 101 102 /* Map the i/o space. */ 103 if (bus_space_map(iot, ia->ia_iobase, LMS_NPORTS, 0, &ioh)) 104 return 0; 105 106 rv = 0; 107 108 /* Configure and check for port present. */ 109 bus_space_write_1(iot, ioh, LMS_CONFIG, 0x91); 110 delay(10); 111 bus_space_write_1(iot, ioh, LMS_SIGN, 0x0c); 112 delay(10); 113 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x0c) 114 goto out; 115 bus_space_write_1(iot, ioh, LMS_SIGN, 0x50); 116 delay(10); 117 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x50) 118 goto out; 119 120 /* Disable interrupts. */ 121 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x10); 122 123 rv = 1; 124 ia->ia_iosize = LMS_NPORTS; 125 ia->ia_msize = 0; 126 127 out: 128 bus_space_unmap(iot, ioh, LMS_NPORTS); 129 return rv; 130 } 131 132 void 133 lmsattach(parent, self, aux) 134 struct device *parent, *self; 135 void *aux; 136 { 137 struct lms_softc *sc = (void *)self; 138 struct isa_attach_args *ia = aux; 139 bus_space_tag_t iot = ia->ia_iot; 140 bus_space_handle_t ioh; 141 142 printf("\n"); 143 144 if (bus_space_map(iot, ia->ia_iobase, LMS_NPORTS, 0, &ioh)) { 145 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 146 return; 147 } 148 149 /* Other initialization was done by lmsprobe. */ 150 sc->sc_iot = iot; 151 sc->sc_ioh = ioh; 152 sc->sc_state = 0; 153 154 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE, 155 IPL_TTY, lmsintr, sc); 156 } 157 158 int 159 lmsopen(dev, flag, mode, p) 160 dev_t dev; 161 int flag; 162 int mode; 163 struct proc *p; 164 { 165 int unit = LMSUNIT(dev); 166 struct lms_softc *sc; 167 168 if (unit >= lms_cd.cd_ndevs) 169 return ENXIO; 170 sc = lms_cd.cd_devs[unit]; 171 if (!sc) 172 return ENXIO; 173 174 if (sc->sc_state & LMS_OPEN) 175 return EBUSY; 176 177 if (clalloc(&sc->sc_q, LMS_BSIZE, 0) == -1) 178 return ENOMEM; 179 180 sc->sc_state |= LMS_OPEN; 181 sc->sc_status = 0; 182 sc->sc_x = sc->sc_y = 0; 183 184 /* Enable interrupts. */ 185 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0); 186 187 return 0; 188 } 189 190 int 191 lmsclose(dev, flag, mode, p) 192 dev_t dev; 193 int flag; 194 int mode; 195 struct proc *p; 196 { 197 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 198 199 /* Disable interrupts. */ 200 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0x10); 201 202 sc->sc_state &= ~LMS_OPEN; 203 204 clfree(&sc->sc_q); 205 206 return 0; 207 } 208 209 int 210 lmsread(dev, uio, flag) 211 dev_t dev; 212 struct uio *uio; 213 int flag; 214 { 215 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 216 int s; 217 int error = 0; 218 size_t length; 219 u_char buffer[LMS_CHUNK]; 220 221 /* Block until mouse activity occured. */ 222 223 s = spltty(); 224 while (sc->sc_q.c_cc == 0) { 225 if (flag & IO_NDELAY) { 226 splx(s); 227 return EWOULDBLOCK; 228 } 229 sc->sc_state |= LMS_ASLP; 230 error = tsleep((caddr_t)sc, PZERO | PCATCH, "lmsrea", 0); 231 if (error) { 232 sc->sc_state &= ~LMS_ASLP; 233 splx(s); 234 return error; 235 } 236 } 237 splx(s); 238 239 /* Transfer as many chunks as possible. */ 240 241 while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) { 242 length = min(sc->sc_q.c_cc, uio->uio_resid); 243 if (length > sizeof(buffer)) 244 length = sizeof(buffer); 245 246 /* Remove a small chunk from the input queue. */ 247 (void) q_to_b(&sc->sc_q, buffer, length); 248 249 /* Copy the data to the user process. */ 250 if ((error = uiomove(buffer, length, uio)) != 0) 251 break; 252 } 253 254 return error; 255 } 256 257 int 258 lmsioctl(dev, cmd, addr, flag, p) 259 dev_t dev; 260 u_long cmd; 261 caddr_t addr; 262 int flag; 263 struct proc *p; 264 { 265 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 266 struct mouseinfo info; 267 int s; 268 int error; 269 270 switch (cmd) { 271 case MOUSEIOCREAD: 272 s = spltty(); 273 274 info.status = sc->sc_status; 275 if (sc->sc_x || sc->sc_y) 276 info.status |= MOVEMENT; 277 278 if (sc->sc_x > 127) 279 info.xmotion = 127; 280 else if (sc->sc_x < -127) 281 /* Bounding at -127 avoids a bug in XFree86. */ 282 info.xmotion = -127; 283 else 284 info.xmotion = sc->sc_x; 285 286 if (sc->sc_y > 127) 287 info.ymotion = 127; 288 else if (sc->sc_y < -127) 289 info.ymotion = -127; 290 else 291 info.ymotion = sc->sc_y; 292 293 /* Reset historical information. */ 294 sc->sc_x = sc->sc_y = 0; 295 sc->sc_status &= ~BUTCHNGMASK; 296 ndflush(&sc->sc_q, sc->sc_q.c_cc); 297 298 splx(s); 299 error = copyout(&info, addr, sizeof(struct mouseinfo)); 300 break; 301 302 default: 303 error = EINVAL; 304 break; 305 } 306 307 return error; 308 } 309 310 int 311 lmsintr(arg) 312 void *arg; 313 { 314 struct lms_softc *sc = arg; 315 bus_space_tag_t iot = sc->sc_iot; 316 bus_space_handle_t ioh = sc->sc_ioh; 317 u_char hi, lo, buttons, changed; 318 char dx, dy; 319 u_char buffer[5]; 320 321 if ((sc->sc_state & LMS_OPEN) == 0) 322 /* Interrupts are not expected. */ 323 return 0; 324 325 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xab); 326 hi = bus_space_read_1(iot, ioh, LMS_DATA); 327 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x90); 328 lo = bus_space_read_1(iot, ioh, LMS_DATA); 329 dx = ((hi & 0x0f) << 4) | (lo & 0x0f); 330 /* Bounding at -127 avoids a bug in XFree86. */ 331 dx = (dx == -128) ? -127 : dx; 332 333 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xf0); 334 hi = bus_space_read_1(iot, ioh, LMS_DATA); 335 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xd0); 336 lo = bus_space_read_1(iot, ioh, LMS_DATA); 337 dy = ((hi & 0x0f) << 4) | (lo & 0x0f); 338 dy = (dy == -128) ? 127 : -dy; 339 340 bus_space_write_1(iot, ioh, LMS_CNTRL, 0); 341 342 buttons = (~hi >> 5) & 0x07; 343 changed = ((buttons ^ sc->sc_status) & 0x07) << 3; 344 sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) | changed; 345 346 if (dx || dy || changed) { 347 /* Update accumulated movements. */ 348 sc->sc_x += dx; 349 sc->sc_y += dy; 350 351 /* Add this event to the queue. */ 352 buffer[0] = 0x80 | (buttons ^ BUTSTATMASK); 353 buffer[1] = dx; 354 buffer[2] = dy; 355 buffer[3] = buffer[4] = 0; 356 (void) b_to_q(buffer, sizeof buffer, &sc->sc_q); 357 358 if (sc->sc_state & LMS_ASLP) { 359 sc->sc_state &= ~LMS_ASLP; 360 wakeup((caddr_t)sc); 361 } 362 selwakeup(&sc->sc_rsel); 363 } 364 365 return -1; 366 } 367 368 int 369 lmspoll(dev, events, p) 370 dev_t dev; 371 int events; 372 struct proc *p; 373 { 374 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 375 int revents = 0; 376 int s = spltty(); 377 378 if (events & (POLLIN | POLLRDNORM)) 379 if (sc->sc_q.c_cc > 0) 380 revents |= events & (POLLIN | POLLRDNORM); 381 else 382 selrecord(p, &sc->sc_rsel); 383 384 splx(s); 385 return (revents); 386 } 387
Indexes created Thu Nov 06 07:09:58 GMT 2025