lms.c revision 1.28
1 /* $NetBSD: lms.c,v 1.28 1996/10/11 00:27:07 christos 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_chipset_tag_t sc_bc; /* bus chipset identifier */ 63 bus_io_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_chipset_tag_t bc = ia->ia_bc; 95 bus_io_handle_t ioh; 96 int rv; 97 98 /* Map the i/o space. */ 99 if (bus_io_map(bc, ia->ia_iobase, LMS_NPORTS, &ioh)) 100 return 0; 101 102 rv = 0; 103 104 /* Configure and check for port present. */ 105 bus_io_write_1(bc, ioh, LMS_CONFIG, 0x91); 106 delay(10); 107 bus_io_write_1(bc, ioh, LMS_SIGN, 0x0c); 108 delay(10); 109 if (bus_io_read_1(bc, ioh, LMS_SIGN) != 0x0c) 110 goto out; 111 bus_io_write_1(bc, ioh, LMS_SIGN, 0x50); 112 delay(10); 113 if (bus_io_read_1(bc, ioh, LMS_SIGN) != 0x50) 114 goto out; 115 116 /* Disable interrupts. */ 117 bus_io_write_1(bc, ioh, LMS_CNTRL, 0x10); 118 119 rv = 1; 120 ia->ia_iosize = LMS_NPORTS; 121 ia->ia_msize = 0; 122 123 out: 124 bus_io_unmap(bc, 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 kprintf("\n"); 137 138 /* Other initialization was done by lmsprobe. */ 139 sc->sc_bc = ia->ia_bc; 140 if (bus_io_map(sc->sc_bc, ia->ia_iobase, LMS_NPORTS, &sc->sc_ioh)) 141 panic("lmsattach: couldn't map I/O ports"); 142 143 sc->sc_state = 0; 144 145 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE, 146 IPL_TTY, lmsintr, sc); 147 } 148 149 int 150 lmsopen(dev, flag, mode, p) 151 dev_t dev; 152 int flag; 153 int mode; 154 struct proc *p; 155 { 156 int unit = LMSUNIT(dev); 157 struct lms_softc *sc; 158 159 if (unit >= lms_cd.cd_ndevs) 160 return ENXIO; 161 sc = lms_cd.cd_devs[unit]; 162 if (!sc) 163 return ENXIO; 164 165 if (sc->sc_state & LMS_OPEN) 166 return EBUSY; 167 168 if (clalloc(&sc->sc_q, LMS_BSIZE, 0) == -1) 169 return ENOMEM; 170 171 sc->sc_state |= LMS_OPEN; 172 sc->sc_status = 0; 173 sc->sc_x = sc->sc_y = 0; 174 175 /* Enable interrupts. */ 176 bus_io_write_1(sc->sc_bc, sc->sc_ioh, LMS_CNTRL, 0); 177 178 return 0; 179 } 180 181 int 182 lmsclose(dev, flag, mode, p) 183 dev_t dev; 184 int flag; 185 int mode; 186 struct proc *p; 187 { 188 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 189 190 /* Disable interrupts. */ 191 bus_io_write_1(sc->sc_bc, sc->sc_ioh, LMS_CNTRL, 0x10); 192 193 sc->sc_state &= ~LMS_OPEN; 194 195 clfree(&sc->sc_q); 196 197 return 0; 198 } 199 200 int 201 lmsread(dev, uio, flag) 202 dev_t dev; 203 struct uio *uio; 204 int flag; 205 { 206 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 207 int s; 208 int error = 0; 209 size_t length; 210 u_char buffer[LMS_CHUNK]; 211 212 /* Block until mouse activity occured. */ 213 214 s = spltty(); 215 while (sc->sc_q.c_cc == 0) { 216 if (flag & IO_NDELAY) { 217 splx(s); 218 return EWOULDBLOCK; 219 } 220 sc->sc_state |= LMS_ASLP; 221 error = tsleep((caddr_t)sc, PZERO | PCATCH, "lmsrea", 0); 222 if (error) { 223 sc->sc_state &= ~LMS_ASLP; 224 splx(s); 225 return error; 226 } 227 } 228 splx(s); 229 230 /* Transfer as many chunks as possible. */ 231 232 while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) { 233 length = min(sc->sc_q.c_cc, uio->uio_resid); 234 if (length > sizeof(buffer)) 235 length = sizeof(buffer); 236 237 /* Remove a small chunk from the input queue. */ 238 (void) q_to_b(&sc->sc_q, buffer, length); 239 240 /* Copy the data to the user process. */ 241 if ((error = uiomove(buffer, length, uio)) != 0) 242 break; 243 } 244 245 return error; 246 } 247 248 int 249 lmsioctl(dev, cmd, addr, flag, p) 250 dev_t dev; 251 u_long cmd; 252 caddr_t addr; 253 int flag; 254 struct proc *p; 255 { 256 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 257 struct mouseinfo info; 258 int s; 259 int error; 260 261 switch (cmd) { 262 case MOUSEIOCREAD: 263 s = spltty(); 264 265 info.status = sc->sc_status; 266 if (sc->sc_x || sc->sc_y) 267 info.status |= MOVEMENT; 268 269 if (sc->sc_x > 127) 270 info.xmotion = 127; 271 else if (sc->sc_x < -127) 272 /* Bounding at -127 avoids a bug in XFree86. */ 273 info.xmotion = -127; 274 else 275 info.xmotion = sc->sc_x; 276 277 if (sc->sc_y > 127) 278 info.ymotion = 127; 279 else if (sc->sc_y < -127) 280 info.ymotion = -127; 281 else 282 info.ymotion = sc->sc_y; 283 284 /* Reset historical information. */ 285 sc->sc_x = sc->sc_y = 0; 286 sc->sc_status &= ~BUTCHNGMASK; 287 ndflush(&sc->sc_q, sc->sc_q.c_cc); 288 289 splx(s); 290 error = copyout(&info, addr, sizeof(struct mouseinfo)); 291 break; 292 293 default: 294 error = EINVAL; 295 break; 296 } 297 298 return error; 299 } 300 301 int 302 lmsintr(arg) 303 void *arg; 304 { 305 struct lms_softc *sc = arg; 306 bus_chipset_tag_t bc = sc->sc_bc; 307 bus_io_handle_t ioh = sc->sc_ioh; 308 u_char hi, lo, buttons, changed; 309 char dx, dy; 310 u_char buffer[5]; 311 312 if ((sc->sc_state & LMS_OPEN) == 0) 313 /* Interrupts are not expected. */ 314 return 0; 315 316 bus_io_write_1(bc, ioh, LMS_CNTRL, 0xab); 317 hi = bus_io_read_1(bc, ioh, LMS_DATA); 318 bus_io_write_1(bc, ioh, LMS_CNTRL, 0x90); 319 lo = bus_io_read_1(bc, ioh, LMS_DATA); 320 dx = ((hi & 0x0f) << 4) | (lo & 0x0f); 321 /* Bounding at -127 avoids a bug in XFree86. */ 322 dx = (dx == -128) ? -127 : dx; 323 324 bus_io_write_1(bc, ioh, LMS_CNTRL, 0xf0); 325 hi = bus_io_read_1(bc, ioh, LMS_DATA); 326 bus_io_write_1(bc, ioh, LMS_CNTRL, 0xd0); 327 lo = bus_io_read_1(bc, ioh, LMS_DATA); 328 dy = ((hi & 0x0f) << 4) | (lo & 0x0f); 329 dy = (dy == -128) ? 127 : -dy; 330 331 bus_io_write_1(bc, ioh, LMS_CNTRL, 0); 332 333 buttons = (~hi >> 5) & 0x07; 334 changed = ((buttons ^ sc->sc_status) & 0x07) << 3; 335 sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) | changed; 336 337 if (dx || dy || changed) { 338 /* Update accumulated movements. */ 339 sc->sc_x += dx; 340 sc->sc_y += dy; 341 342 /* Add this event to the queue. */ 343 buffer[0] = 0x80 | (buttons ^ BUTSTATMASK); 344 buffer[1] = dx; 345 buffer[2] = dy; 346 buffer[3] = buffer[4] = 0; 347 (void) b_to_q(buffer, sizeof buffer, &sc->sc_q); 348 349 if (sc->sc_state & LMS_ASLP) { 350 sc->sc_state &= ~LMS_ASLP; 351 wakeup((caddr_t)sc); 352 } 353 selwakeup(&sc->sc_rsel); 354 } 355 356 return -1; 357 } 358 359 int 360 lmspoll(dev, events, p) 361 dev_t dev; 362 int events; 363 struct proc *p; 364 { 365 struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)]; 366 int revents = 0; 367 int s = spltty(); 368 369 if (events & (POLLIN | POLLRDNORM)) 370 if (sc->sc_q.c_cc > 0) 371 revents |= events & (POLLIN | POLLRDNORM); 372 else 373 selrecord(p, &sc->sc_rsel); 374 375 splx(s); 376 return (revents); 377 } 378
Indexes created Thu Nov 06 07:09:58 GMT 2025