lms.c revision 1.31
1 /* $NetBSD: lms.c,v 1.31 1997/10/19 19:00:24 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 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 == IOBASEUNK) 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; 139 140 printf("\n"); 141 142 /* Other initialization was done by lmsprobe. */ 143 sc->sc_iot = ia->ia_iot; 144 if (bus_space_map(sc->sc_iot, ia->ia_iobase, LMS_NPORTS, 0, 145 &sc->sc_ioh)) 146 panic("lmsattach: couldn't map I/O ports"); 147 148 sc->sc_state = 0; 149 150 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE, 151 IPL_TTY, lmsintr, sc); 152 } 153 154 int 155 lmsopen(dev, flag, mode, p) 156 dev_t dev; 157 int flag; 158 int mode; 159 struct proc *p; 160 { 161 int unit = LMSUNIT(dev); 162 struct lms_softc *sc; 163 164 if (unit >= lms_cd.cd_ndevs) 165 return ENXIO; 166 sc = lms_cd.cd_devs[unit]; 167 if (!sc) 168 return ENXIO; 169 170 if (sc->sc_state & LMS_OPEN) 171 return EBUSY; 172 173 if (clalloc(&sc->sc_q, LMS_BSIZE, 0) == -1) 174 return ENOMEM; 175 176 sc->sc_state |= LMS_OPEN; 177 sc->sc_status = 0; 178 sc->sc_x = sc->sc_y = 0; 179 180 /* Enable interrupts. */ 181 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0); 182 183 return 0; 184 } 185 186 int 187 lmsclose(dev, flag, mode, p) 188 dev_t dev; 189 int flag; 190 int mode; 191 struct proc *p; 192 { 193 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 194 195 /* Disable interrupts. */ 196 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0x10); 197 198 sc->sc_state &= ~LMS_OPEN; 199 200 clfree(&sc->sc_q); 201 202 return 0; 203 } 204 205 int 206 lmsread(dev, uio, flag) 207 dev_t dev; 208 struct uio *uio; 209 int flag; 210 { 211 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 212 int s; 213 int error = 0; 214 size_t length; 215 u_char buffer[LMS_CHUNK]; 216 217 /* Block until mouse activity occured. */ 218 219 s = spltty(); 220 while (sc->sc_q.c_cc == 0) { 221 if (flag & IO_NDELAY) { 222 splx(s); 223 return EWOULDBLOCK; 224 } 225 sc->sc_state |= LMS_ASLP; 226 error = tsleep((caddr_t)sc, PZERO | PCATCH, "lmsrea", 0); 227 if (error) { 228 sc->sc_state &= ~LMS_ASLP; 229 splx(s); 230 return error; 231 } 232 } 233 splx(s); 234 235 /* Transfer as many chunks as possible. */ 236 237 while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) { 238 length = min(sc->sc_q.c_cc, uio->uio_resid); 239 if (length > sizeof(buffer)) 240 length = sizeof(buffer); 241 242 /* Remove a small chunk from the input queue. */ 243 (void) q_to_b(&sc->sc_q, buffer, length); 244 245 /* Copy the data to the user process. */ 246 if ((error = uiomove(buffer, length, uio)) != 0) 247 break; 248 } 249 250 return error; 251 } 252 253 int 254 lmsioctl(dev, cmd, addr, flag, p) 255 dev_t dev; 256 u_long cmd; 257 caddr_t addr; 258 int flag; 259 struct proc *p; 260 { 261 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 262 struct mouseinfo info; 263 int s; 264 int error; 265 266 switch (cmd) { 267 case MOUSEIOCREAD: 268 s = spltty(); 269 270 info.status = sc->sc_status; 271 if (sc->sc_x || sc->sc_y) 272 info.status |= MOVEMENT; 273 274 if (sc->sc_x > 127) 275 info.xmotion = 127; 276 else if (sc->sc_x < -127) 277 /* Bounding at -127 avoids a bug in XFree86. */ 278 info.xmotion = -127; 279 else 280 info.xmotion = sc->sc_x; 281 282 if (sc->sc_y > 127) 283 info.ymotion = 127; 284 else if (sc->sc_y < -127) 285 info.ymotion = -127; 286 else 287 info.ymotion = sc->sc_y; 288 289 /* Reset historical information. */ 290 sc->sc_x = sc->sc_y = 0; 291 sc->sc_status &= ~BUTCHNGMASK; 292 ndflush(&sc->sc_q, sc->sc_q.c_cc); 293 294 splx(s); 295 error = copyout(&info, addr, sizeof(struct mouseinfo)); 296 break; 297 298 default: 299 error = EINVAL; 300 break; 301 } 302 303 return error; 304 } 305 306 int 307 lmsintr(arg) 308 void *arg; 309 { 310 struct lms_softc *sc = arg; 311 bus_space_tag_t iot = sc->sc_iot; 312 bus_space_handle_t ioh = sc->sc_ioh; 313 u_char hi, lo, buttons, changed; 314 char dx, dy; 315 u_char buffer[5]; 316 317 if ((sc->sc_state & LMS_OPEN) == 0) 318 /* Interrupts are not expected. */ 319 return 0; 320 321 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xab); 322 hi = bus_space_read_1(iot, ioh, LMS_DATA); 323 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x90); 324 lo = bus_space_read_1(iot, ioh, LMS_DATA); 325 dx = ((hi & 0x0f) << 4) | (lo & 0x0f); 326 /* Bounding at -127 avoids a bug in XFree86. */ 327 dx = (dx == -128) ? -127 : dx; 328 329 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xf0); 330 hi = bus_space_read_1(iot, ioh, LMS_DATA); 331 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xd0); 332 lo = bus_space_read_1(iot, ioh, LMS_DATA); 333 dy = ((hi & 0x0f) << 4) | (lo & 0x0f); 334 dy = (dy == -128) ? 127 : -dy; 335 336 bus_space_write_1(iot, ioh, LMS_CNTRL, 0); 337 338 buttons = (~hi >> 5) & 0x07; 339 changed = ((buttons ^ sc->sc_status) & 0x07) << 3; 340 sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) | changed; 341 342 if (dx || dy || changed) { 343 /* Update accumulated movements. */ 344 sc->sc_x += dx; 345 sc->sc_y += dy; 346 347 /* Add this event to the queue. */ 348 buffer[0] = 0x80 | (buttons ^ BUTSTATMASK); 349 buffer[1] = dx; 350 buffer[2] = dy; 351 buffer[3] = buffer[4] = 0; 352 (void) b_to_q(buffer, sizeof buffer, &sc->sc_q); 353 354 if (sc->sc_state & LMS_ASLP) { 355 sc->sc_state &= ~LMS_ASLP; 356 wakeup((caddr_t)sc); 357 } 358 selwakeup(&sc->sc_rsel); 359 } 360 361 return -1; 362 } 363 364 int 365 lmspoll(dev, events, p) 366 dev_t dev; 367 int events; 368 struct proc *p; 369 { 370 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 371 int revents = 0; 372 int s = spltty(); 373 374 if (events & (POLLIN | POLLRDNORM)) 375 if (sc->sc_q.c_cc > 0) 376 revents |= events & (POLLIN | POLLRDNORM); 377 else 378 selrecord(p, &sc->sc_rsel); 379 380 splx(s); 381 return (revents); 382 } 383
Indexes created Thu Nov 06 07:09:58 GMT 2025