lms.c revision 1.30
1 /* $NetBSD: lms.c,v 1.30 1996/10/21 22:27:41 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 /* Map the i/o space. */ 99 if (bus_space_map(iot, ia->ia_iobase, LMS_NPORTS, 0, &ioh)) 100 return 0; 101 102 rv = 0; 103 104 /* Configure and check for port present. */ 105 bus_space_write_1(iot, ioh, LMS_CONFIG, 0x91); 106 delay(10); 107 bus_space_write_1(iot, ioh, LMS_SIGN, 0x0c); 108 delay(10); 109 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x0c) 110 goto out; 111 bus_space_write_1(iot, ioh, LMS_SIGN, 0x50); 112 delay(10); 113 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x50) 114 goto out; 115 116 /* Disable interrupts. */ 117 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x10); 118 119 rv = 1; 120 ia->ia_iosize = LMS_NPORTS; 121 ia->ia_msize = 0; 122 123 out: 124 bus_space_unmap(iot, ioh, LMS_NPORTS); 125 return rv; 126 } 127 128 void 129 lmsattach(parent, self, aux) 130 struct device *parent, *self; 131 void *aux; 132 { 133 struct lms_softc *sc = (void *)self; 134 struct isa_attach_args *ia = aux; 135 136 printf("\n"); 137 138 /* Other initialization was done by lmsprobe. */ 139 sc->sc_iot = ia->ia_iot; 140 if (bus_space_map(sc->sc_iot, ia->ia_iobase, LMS_NPORTS, 0, 141 &sc->sc_ioh)) 142 panic("lmsattach: couldn't map I/O ports"); 143 144 sc->sc_state = 0; 145 146 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE, 147 IPL_TTY, lmsintr, sc); 148 } 149 150 int 151 lmsopen(dev, flag, mode, p) 152 dev_t dev; 153 int flag; 154 int mode; 155 struct proc *p; 156 { 157 int unit = LMSUNIT(dev); 158 struct lms_softc *sc; 159 160 if (unit >= lms_cd.cd_ndevs) 161 return ENXIO; 162 sc = lms_cd.cd_devs[unit]; 163 if (!sc) 164 return ENXIO; 165 166 if (sc->sc_state & LMS_OPEN) 167 return EBUSY; 168 169 if (clalloc(&sc->sc_q, LMS_BSIZE, 0) == -1) 170 return ENOMEM; 171 172 sc->sc_state |= LMS_OPEN; 173 sc->sc_status = 0; 174 sc->sc_x = sc->sc_y = 0; 175 176 /* Enable interrupts. */ 177 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0); 178 179 return 0; 180 } 181 182 int 183 lmsclose(dev, flag, mode, p) 184 dev_t dev; 185 int flag; 186 int mode; 187 struct proc *p; 188 { 189 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 190 191 /* Disable interrupts. */ 192 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0x10); 193 194 sc->sc_state &= ~LMS_OPEN; 195 196 clfree(&sc->sc_q); 197 198 return 0; 199 } 200 201 int 202 lmsread(dev, uio, flag) 203 dev_t dev; 204 struct uio *uio; 205 int flag; 206 { 207 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 208 int s; 209 int error = 0; 210 size_t length; 211 u_char buffer[LMS_CHUNK]; 212 213 /* Block until mouse activity occured. */ 214 215 s = spltty(); 216 while (sc->sc_q.c_cc == 0) { 217 if (flag & IO_NDELAY) { 218 splx(s); 219 return EWOULDBLOCK; 220 } 221 sc->sc_state |= LMS_ASLP; 222 error = tsleep((caddr_t)sc, PZERO | PCATCH, "lmsrea", 0); 223 if (error) { 224 sc->sc_state &= ~LMS_ASLP; 225 splx(s); 226 return error; 227 } 228 } 229 splx(s); 230 231 /* Transfer as many chunks as possible. */ 232 233 while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) { 234 length = min(sc->sc_q.c_cc, uio->uio_resid); 235 if (length > sizeof(buffer)) 236 length = sizeof(buffer); 237 238 /* Remove a small chunk from the input queue. */ 239 (void) q_to_b(&sc->sc_q, buffer, length); 240 241 /* Copy the data to the user process. */ 242 if ((error = uiomove(buffer, length, uio)) != 0) 243 break; 244 } 245 246 return error; 247 } 248 249 int 250 lmsioctl(dev, cmd, addr, flag, p) 251 dev_t dev; 252 u_long cmd; 253 caddr_t addr; 254 int flag; 255 struct proc *p; 256 { 257 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 258 struct mouseinfo info; 259 int s; 260 int error; 261 262 switch (cmd) { 263 case MOUSEIOCREAD: 264 s = spltty(); 265 266 info.status = sc->sc_status; 267 if (sc->sc_x || sc->sc_y) 268 info.status |= MOVEMENT; 269 270 if (sc->sc_x > 127) 271 info.xmotion = 127; 272 else if (sc->sc_x < -127) 273 /* Bounding at -127 avoids a bug in XFree86. */ 274 info.xmotion = -127; 275 else 276 info.xmotion = sc->sc_x; 277 278 if (sc->sc_y > 127) 279 info.ymotion = 127; 280 else if (sc->sc_y < -127) 281 info.ymotion = -127; 282 else 283 info.ymotion = sc->sc_y; 284 285 /* Reset historical information. */ 286 sc->sc_x = sc->sc_y = 0; 287 sc->sc_status &= ~BUTCHNGMASK; 288 ndflush(&sc->sc_q, sc->sc_q.c_cc); 289 290 splx(s); 291 error = copyout(&info, addr, sizeof(struct mouseinfo)); 292 break; 293 294 default: 295 error = EINVAL; 296 break; 297 } 298 299 return error; 300 } 301 302 int 303 lmsintr(arg) 304 void *arg; 305 { 306 struct lms_softc *sc = arg; 307 bus_space_tag_t iot = sc->sc_iot; 308 bus_space_handle_t ioh = sc->sc_ioh; 309 u_char hi, lo, buttons, changed; 310 char dx, dy; 311 u_char buffer[5]; 312 313 if ((sc->sc_state & LMS_OPEN) == 0) 314 /* Interrupts are not expected. */ 315 return 0; 316 317 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xab); 318 hi = bus_space_read_1(iot, ioh, LMS_DATA); 319 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x90); 320 lo = bus_space_read_1(iot, ioh, LMS_DATA); 321 dx = ((hi & 0x0f) << 4) | (lo & 0x0f); 322 /* Bounding at -127 avoids a bug in XFree86. */ 323 dx = (dx == -128) ? -127 : dx; 324 325 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xf0); 326 hi = bus_space_read_1(iot, ioh, LMS_DATA); 327 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xd0); 328 lo = bus_space_read_1(iot, ioh, LMS_DATA); 329 dy = ((hi & 0x0f) << 4) | (lo & 0x0f); 330 dy = (dy == -128) ? 127 : -dy; 331 332 bus_space_write_1(iot, ioh, LMS_CNTRL, 0); 333 334 buttons = (~hi >> 5) & 0x07; 335 changed = ((buttons ^ sc->sc_status) & 0x07) << 3; 336 sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) | changed; 337 338 if (dx || dy || changed) { 339 /* Update accumulated movements. */ 340 sc->sc_x += dx; 341 sc->sc_y += dy; 342 343 /* Add this event to the queue. */ 344 buffer[0] = 0x80 | (buttons ^ BUTSTATMASK); 345 buffer[1] = dx; 346 buffer[2] = dy; 347 buffer[3] = buffer[4] = 0; 348 (void) b_to_q(buffer, sizeof buffer, &sc->sc_q); 349 350 if (sc->sc_state & LMS_ASLP) { 351 sc->sc_state &= ~LMS_ASLP; 352 wakeup((caddr_t)sc); 353 } 354 selwakeup(&sc->sc_rsel); 355 } 356 357 return -1; 358 } 359 360 int 361 lmspoll(dev, events, p) 362 dev_t dev; 363 int events; 364 struct proc *p; 365 { 366 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 367 int revents = 0; 368 int s = spltty(); 369 370 if (events & (POLLIN | POLLRDNORM)) 371 if (sc->sc_q.c_cc > 0) 372 revents |= events & (POLLIN | POLLRDNORM); 373 else 374 selrecord(p, &sc->sc_rsel); 375 376 splx(s); 377 return (revents); 378 } 379
Indexes created Thu Nov 06 07:09:58 GMT 2025