lms.c revision 1.33
1 /* $NetBSD: lms.c,v 1.33 1998/01/12 18:59:13 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/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 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 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 base. */ 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, LMS_NPORTS, 0, &ioh)) 102 return 0; 103 104 rv = 0; 105 106 /* Configure and check for port present. */ 107 bus_space_write_1(iot, ioh, LMS_CONFIG, 0x91); 108 delay(10); 109 bus_space_write_1(iot, ioh, LMS_SIGN, 0x0c); 110 delay(10); 111 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x0c) 112 goto out; 113 bus_space_write_1(iot, ioh, LMS_SIGN, 0x50); 114 delay(10); 115 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x50) 116 goto out; 117 118 /* Disable interrupts. */ 119 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x10); 120 121 rv = 1; 122 ia->ia_iosize = LMS_NPORTS; 123 ia->ia_msize = 0; 124 125 out: 126 bus_space_unmap(iot, ioh, LMS_NPORTS); 127 return rv; 128 } 129 130 void 131 lmsattach(parent, self, aux) 132 struct device *parent, *self; 133 void *aux; 134 { 135 struct lms_softc *sc = (void *)self; 136 struct isa_attach_args *ia = aux; 137 bus_space_tag_t iot = ia->ia_iot; 138 bus_space_handle_t ioh; 139 140 printf("\n"); 141 142 if (bus_space_map(iot, ia->ia_iobase, LMS_NPORTS, 0, &ioh)) { 143 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 144 return; 145 } 146 147 /* Other initialization was done by lmsprobe. */ 148 sc->sc_iot = iot; 149 sc->sc_ioh = ioh; 150 sc->sc_state = 0; 151 152 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE, 153 IPL_TTY, lmsintr, sc); 154 } 155 156 int 157 lmsopen(dev, flag, mode, p) 158 dev_t dev; 159 int flag; 160 int mode; 161 struct proc *p; 162 { 163 int unit = LMSUNIT(dev); 164 struct lms_softc *sc; 165 166 if (unit >= lms_cd.cd_ndevs) 167 return ENXIO; 168 sc = lms_cd.cd_devs[unit]; 169 if (!sc) 170 return ENXIO; 171 172 if (sc->sc_state & LMS_OPEN) 173 return EBUSY; 174 175 if (clalloc(&sc->sc_q, LMS_BSIZE, 0) == -1) 176 return ENOMEM; 177 178 sc->sc_state |= LMS_OPEN; 179 sc->sc_status = 0; 180 sc->sc_x = sc->sc_y = 0; 181 182 /* Enable interrupts. */ 183 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0); 184 185 return 0; 186 } 187 188 int 189 lmsclose(dev, flag, mode, p) 190 dev_t dev; 191 int flag; 192 int mode; 193 struct proc *p; 194 { 195 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 196 197 /* Disable interrupts. */ 198 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0x10); 199 200 sc->sc_state &= ~LMS_OPEN; 201 202 clfree(&sc->sc_q); 203 204 return 0; 205 } 206 207 int 208 lmsread(dev, uio, flag) 209 dev_t dev; 210 struct uio *uio; 211 int flag; 212 { 213 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 214 int s; 215 int error = 0; 216 size_t length; 217 u_char buffer[LMS_CHUNK]; 218 219 /* Block until mouse activity occured. */ 220 221 s = spltty(); 222 while (sc->sc_q.c_cc == 0) { 223 if (flag & IO_NDELAY) { 224 splx(s); 225 return EWOULDBLOCK; 226 } 227 sc->sc_state |= LMS_ASLP; 228 error = tsleep((caddr_t)sc, PZERO | PCATCH, "lmsrea", 0); 229 if (error) { 230 sc->sc_state &= ~LMS_ASLP; 231 splx(s); 232 return error; 233 } 234 } 235 splx(s); 236 237 /* Transfer as many chunks as possible. */ 238 239 while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) { 240 length = min(sc->sc_q.c_cc, uio->uio_resid); 241 if (length > sizeof(buffer)) 242 length = sizeof(buffer); 243 244 /* Remove a small chunk from the input queue. */ 245 (void) q_to_b(&sc->sc_q, buffer, length); 246 247 /* Copy the data to the user process. */ 248 if ((error = uiomove(buffer, length, uio)) != 0) 249 break; 250 } 251 252 return error; 253 } 254 255 int 256 lmsioctl(dev, cmd, addr, flag, p) 257 dev_t dev; 258 u_long cmd; 259 caddr_t addr; 260 int flag; 261 struct proc *p; 262 { 263 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 264 struct mouseinfo info; 265 int s; 266 int error; 267 268 switch (cmd) { 269 case MOUSEIOCREAD: 270 s = spltty(); 271 272 info.status = sc->sc_status; 273 if (sc->sc_x || sc->sc_y) 274 info.status |= MOVEMENT; 275 276 if (sc->sc_x > 127) 277 info.xmotion = 127; 278 else if (sc->sc_x < -127) 279 /* Bounding at -127 avoids a bug in XFree86. */ 280 info.xmotion = -127; 281 else 282 info.xmotion = sc->sc_x; 283 284 if (sc->sc_y > 127) 285 info.ymotion = 127; 286 else if (sc->sc_y < -127) 287 info.ymotion = -127; 288 else 289 info.ymotion = sc->sc_y; 290 291 /* Reset historical information. */ 292 sc->sc_x = sc->sc_y = 0; 293 sc->sc_status &= ~BUTCHNGMASK; 294 ndflush(&sc->sc_q, sc->sc_q.c_cc); 295 296 splx(s); 297 error = copyout(&info, addr, sizeof(struct mouseinfo)); 298 break; 299 300 default: 301 error = EINVAL; 302 break; 303 } 304 305 return error; 306 } 307 308 int 309 lmsintr(arg) 310 void *arg; 311 { 312 struct lms_softc *sc = arg; 313 bus_space_tag_t iot = sc->sc_iot; 314 bus_space_handle_t ioh = sc->sc_ioh; 315 u_char hi, lo, buttons, changed; 316 char dx, dy; 317 u_char buffer[5]; 318 319 if ((sc->sc_state & LMS_OPEN) == 0) 320 /* Interrupts are not expected. */ 321 return 0; 322 323 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xab); 324 hi = bus_space_read_1(iot, ioh, LMS_DATA); 325 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x90); 326 lo = bus_space_read_1(iot, ioh, LMS_DATA); 327 dx = ((hi & 0x0f) << 4) | (lo & 0x0f); 328 /* Bounding at -127 avoids a bug in XFree86. */ 329 dx = (dx == -128) ? -127 : dx; 330 331 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xf0); 332 hi = bus_space_read_1(iot, ioh, LMS_DATA); 333 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xd0); 334 lo = bus_space_read_1(iot, ioh, LMS_DATA); 335 dy = ((hi & 0x0f) << 4) | (lo & 0x0f); 336 dy = (dy == -128) ? 127 : -dy; 337 338 bus_space_write_1(iot, ioh, LMS_CNTRL, 0); 339 340 buttons = (~hi >> 5) & 0x07; 341 changed = ((buttons ^ sc->sc_status) & 0x07) << 3; 342 sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) | changed; 343 344 if (dx || dy || changed) { 345 /* Update accumulated movements. */ 346 sc->sc_x += dx; 347 sc->sc_y += dy; 348 349 /* Add this event to the queue. */ 350 buffer[0] = 0x80 | (buttons ^ BUTSTATMASK); 351 buffer[1] = dx; 352 buffer[2] = dy; 353 buffer[3] = buffer[4] = 0; 354 (void) b_to_q(buffer, sizeof buffer, &sc->sc_q); 355 356 if (sc->sc_state & LMS_ASLP) { 357 sc->sc_state &= ~LMS_ASLP; 358 wakeup((caddr_t)sc); 359 } 360 selwakeup(&sc->sc_rsel); 361 } 362 363 return -1; 364 } 365 366 int 367 lmspoll(dev, events, p) 368 dev_t dev; 369 int events; 370 struct proc *p; 371 { 372 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 373 int revents = 0; 374 int s = spltty(); 375 376 if (events & (POLLIN | POLLRDNORM)) 377 if (sc->sc_q.c_cc > 0) 378 revents |= events & (POLLIN | POLLRDNORM); 379 else 380 selrecord(p, &sc->sc_rsel); 381 382 splx(s); 383 return (revents); 384 } 385
Indexes created Thu Nov 06 07:09:58 GMT 2025