zsms.c revision 1.13
1 /* $NetBSD: zsms.c,v 1.13 2006/03/30 16:18:49 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)ms.c 8.1 (Berkeley) 6/11/93 41 */ 42 43 /* 44 * VSXXX mice attached with channel A of the 1st SCC 45 */ 46 47 #include <sys/cdefs.h> 48 __KERNEL_RCSID(0, "$NetBSD: zsms.c,v 1.13 2006/03/30 16:18:49 thorpej Exp $"); 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/device.h> 53 #include <sys/ioctl.h> 54 #include <sys/syslog.h> 55 #include <sys/kernel.h> 56 #include <sys/proc.h> 57 #include <sys/tty.h> 58 59 #include <dev/ic/z8530reg.h> 60 #include <machine/z8530var.h> 61 62 #include <dev/dec/lk201.h> 63 64 #include <dev/wscons/wsconsio.h> 65 #include <dev/wscons/wsmousevar.h> 66 67 #include "locators.h" 68 69 /* 70 * How many input characters we can buffer. 71 * The port-specific var.h may override this. 72 * Note: must be a power of two! 73 */ 74 #define ZSMS_RX_RING_SIZE 256 75 #define ZSMS_RX_RING_MASK (ZSMS_RX_RING_SIZE-1) 76 /* 77 * Output buffer. Only need a few chars. 78 */ 79 #define ZSMS_TX_RING_SIZE 16 80 #define ZSMS_TX_RING_MASK (ZSMS_TX_RING_SIZE-1) 81 82 #define ZSMS_BPS 4800 83 84 struct zsms_softc { /* driver status information */ 85 struct device zsms_dev; /* required first: base device */ 86 struct zs_chanstate *zsms_cs; 87 88 /* Flags to communicate with zsms_softintr() */ 89 volatile int zsms_intr_flags; 90 #define INTR_RX_OVERRUN 1 91 #define INTR_TX_EMPTY 2 92 #define INTR_ST_CHECK 4 93 94 /* 95 * The receive ring buffer. 96 */ 97 u_int zsms_rbget; /* ring buffer `get' index */ 98 volatile u_int zsms_rbput; /* ring buffer `put' index */ 99 u_short zsms_rbuf[ZSMS_RX_RING_SIZE]; /* rr1, data pairs */ 100 101 int sc_enabled; /* input enabled? */ 102 int sc_selftest; /* self test in progress */ 103 104 int inputstate; 105 u_int buttons; 106 int dx, dy; 107 108 struct device *sc_wsmousedev; 109 }; 110 111 struct zsops zsops_zsms; 112 113 static int zsms_match(struct device *, struct cfdata *, void *); 114 static void zsms_attach(struct device *, struct device *, void *); 115 static void zsms_input(void *, int); 116 117 CFATTACH_DECL(zsms, sizeof(struct zsms_softc), 118 zsms_match, zsms_attach, NULL, NULL); 119 120 static int zsms_enable(void *); 121 static int zsms_ioctl(void *, u_long, caddr_t, int, struct lwp *); 122 static void zsms_disable(void *); 123 124 const struct wsmouse_accessops zsms_accessops = { 125 zsms_enable, 126 zsms_ioctl, 127 zsms_disable, 128 }; 129 130 static int 131 zsms_match(parent, cf, aux) 132 struct device *parent; 133 struct cfdata *cf; 134 void *aux; 135 { 136 struct zsc_attach_args *args = aux; 137 138 /* Exact match is better than wildcard. */ 139 if (cf->cf_loc[ZSCCF_CHANNEL] == args->channel) 140 return 2; 141 142 /* This driver accepts wildcard. */ 143 if (cf->cf_loc[ZSCCF_CHANNEL] == ZSCCF_CHANNEL_DEFAULT) 144 return 1; 145 146 return 0; 147 } 148 149 static void 150 zsms_attach(parent, self, aux) 151 struct device *parent, *self; 152 void *aux; 153 { 154 struct zsc_softc *zsc = device_private(parent); 155 struct zsms_softc *zsms = device_private(self); 156 struct zsc_attach_args *args = aux; 157 struct zs_chanstate *cs; 158 struct wsmousedev_attach_args a; 159 int s; 160 161 cs = zsc->zsc_cs[args->channel]; 162 cs->cs_private = zsms; 163 cs->cs_ops = &zsops_zsms; 164 zsms->zsms_cs = cs; 165 166 printf("\n"); 167 168 /* Initialize the speed, etc. */ 169 s = splzs(); 170 /* May need reset... */ 171 zs_write_reg(cs, 9, ZSWR9_A_RESET); 172 /* These are OK as set by zscc: WR3, WR5 */ 173 /* We don't care about status or tx interrupts. */ 174 cs->cs_preg[1] = ZSWR1_RIE; 175 (void) zs_set_speed(cs, ZSMS_BPS); 176 177 /* mouse wants odd parity */ 178 cs->cs_preg[4] |= ZSWR4_PARENB; 179 /* cs->cs_preg[4] &= ~ZSWR4_EVENP; (no-op) */ 180 181 zs_loadchannelregs(cs); 182 splx(s); 183 184 a.accessops = &zsms_accessops; 185 a.accesscookie = zsms; 186 187 zsms->sc_enabled = 0; 188 zsms->sc_selftest = 0; 189 zsms->sc_wsmousedev = config_found(self, &a, wsmousedevprint); 190 } 191 192 static int 193 zsms_enable(v) 194 void *v; 195 { 196 struct zsms_softc *sc = v; 197 198 if (sc->sc_enabled) 199 return EBUSY; 200 201 sc->sc_selftest = 4; /* wait for 4 byte reply upto 1/2 sec */ 202 zs_write_data(sc->zsms_cs, MOUSE_SELF_TEST); 203 (void)tsleep(zsms_enable, TTIPRI, "zsmsopen", hz / 2); 204 if (sc->sc_selftest != 0) { 205 sc->sc_selftest = 0; 206 return ENXIO; 207 } 208 /* XXX DELAY before mode set? */ 209 zs_write_data(sc->zsms_cs, MOUSE_INCREMENTAL); 210 sc->sc_enabled = 1; 211 sc->inputstate = 0; 212 return 0; 213 } 214 215 static void 216 zsms_disable(v) 217 void *v; 218 { 219 struct zsms_softc *sc = v; 220 221 sc->sc_enabled = 0; 222 } 223 224 static int 225 zsms_ioctl(v, cmd, data, flag, l) 226 void *v; 227 u_long cmd; 228 caddr_t data; 229 int flag; 230 struct lwp *l; 231 { 232 233 if (cmd == WSMOUSEIO_GTYPE) { 234 *(u_int *)data = WSMOUSE_TYPE_VSXXX; 235 return 0; 236 } 237 return EPASSTHROUGH; 238 } 239 240 static void 241 zsms_input(vsc, data) 242 void *vsc; 243 int data; 244 { 245 struct zsms_softc *sc = vsc; 246 247 if (sc->sc_enabled == 0) { 248 if (sc->sc_selftest > 0) { 249 sc->sc_selftest -= 1; 250 if (sc->sc_selftest == 0) 251 wakeup(zsms_enable); 252 } 253 return; 254 } 255 256 if ((data & MOUSE_START_FRAME) != 0) 257 sc->inputstate = 1; 258 else 259 sc->inputstate++; 260 261 if (sc->inputstate == 1) { 262 /* LMR -> RML: wsevents counts 0 for the left-most */ 263 sc->buttons = data & 02; 264 if (data & 01) 265 sc->buttons |= 04; 266 if (data & 04) 267 sc->buttons |= 01; 268 sc->dx = data & MOUSE_X_SIGN; 269 sc->dy = data & MOUSE_Y_SIGN; 270 } else if (sc->inputstate == 2) { 271 if (sc->dx == 0) 272 sc->dx = -data; 273 else 274 sc->dx = data; 275 } else if (sc->inputstate == 3) { 276 sc->inputstate = 0; 277 if (sc->dy == 0) 278 sc->dy = -data; 279 else 280 sc->dy = data; 281 wsmouse_input(sc->sc_wsmousedev, sc->buttons, 282 sc->dx, sc->dy, 0, WSMOUSE_INPUT_DELTA); 283 } 284 285 return; 286 } 287 288 /**************************************************************** 289 * Interface to the lower layer (zscc) 290 ****************************************************************/ 291 292 static void zsms_rxint(struct zs_chanstate *); 293 static void zsms_stint(struct zs_chanstate *, int); 294 static void zsms_txint(struct zs_chanstate *); 295 static void zsms_softint(struct zs_chanstate *); 296 297 static void 298 zsms_rxint(cs) 299 struct zs_chanstate *cs; 300 { 301 struct zsms_softc *zsms; 302 int put, put_next; 303 u_char c, rr1; 304 305 zsms = cs->cs_private; 306 put = zsms->zsms_rbput; 307 308 /* 309 * First read the status, because reading the received char 310 * destroys the status of this char. 311 */ 312 rr1 = zs_read_reg(cs, 1); 313 c = zs_read_data(cs); 314 if (rr1 & (ZSRR1_FE | ZSRR1_DO | ZSRR1_PE)) { 315 /* Clear the receive error. */ 316 zs_write_csr(cs, ZSWR0_RESET_ERRORS); 317 } 318 319 zsms->zsms_rbuf[put] = (c << 8) | rr1; 320 put_next = (put + 1) & ZSMS_RX_RING_MASK; 321 322 /* Would overrun if increment makes (put==get). */ 323 if (put_next == zsms->zsms_rbget) { 324 zsms->zsms_intr_flags |= INTR_RX_OVERRUN; 325 } else { 326 /* OK, really increment. */ 327 put = put_next; 328 } 329 330 /* Done reading. */ 331 zsms->zsms_rbput = put; 332 333 /* Ask for softint() call. */ 334 cs->cs_softreq = 1; 335 } 336 337 338 static void 339 zsms_txint(cs) 340 struct zs_chanstate *cs; 341 { 342 struct zsms_softc *zsms; 343 344 zsms = cs->cs_private; 345 zs_write_csr(cs, ZSWR0_RESET_TXINT); 346 zsms->zsms_intr_flags |= INTR_TX_EMPTY; 347 /* Ask for softint() call. */ 348 cs->cs_softreq = 1; 349 } 350 351 352 static void 353 zsms_stint(cs, force) 354 struct zs_chanstate *cs; 355 int force; 356 { 357 struct zsms_softc *zsms; 358 int rr0; 359 360 zsms = cs->cs_private; 361 362 rr0 = zs_read_csr(cs); 363 zs_write_csr(cs, ZSWR0_RESET_STATUS); 364 365 /* 366 * We have to accumulate status line changes here. 367 * Otherwise, if we get multiple status interrupts 368 * before the softint runs, we could fail to notice 369 * some status line changes in the softint routine. 370 * Fix from Bill Studenmund, October 1996. 371 */ 372 cs->cs_rr0_delta |= (cs->cs_rr0 ^ rr0); 373 cs->cs_rr0 = rr0; 374 zsms->zsms_intr_flags |= INTR_ST_CHECK; 375 376 /* Ask for softint() call. */ 377 cs->cs_softreq = 1; 378 } 379 380 381 static void 382 zsms_softint(cs) 383 struct zs_chanstate *cs; 384 { 385 struct zsms_softc *zsms; 386 int get, c, s; 387 int intr_flags; 388 u_short ring_data; 389 390 zsms = cs->cs_private; 391 392 /* Atomically get and clear flags. */ 393 s = splzs(); 394 intr_flags = zsms->zsms_intr_flags; 395 zsms->zsms_intr_flags = 0; 396 397 /* Now lower to spltty for the rest. */ 398 (void) spltty(); 399 400 /* 401 * Copy data from the receive ring to the event layer. 402 */ 403 get = zsms->zsms_rbget; 404 while (get != zsms->zsms_rbput) { 405 ring_data = zsms->zsms_rbuf[get]; 406 get = (get + 1) & ZSMS_RX_RING_MASK; 407 408 /* low byte of ring_data is rr1 */ 409 c = (ring_data >> 8) & 0xff; 410 411 if (ring_data & ZSRR1_DO) 412 intr_flags |= INTR_RX_OVERRUN; 413 if (ring_data & (ZSRR1_FE | ZSRR1_PE)) { 414 log(LOG_ERR, "%s: input error (0x%x)\n", 415 zsms->zsms_dev.dv_xname, ring_data); 416 c = -1; /* signal input error */ 417 } 418 419 /* Pass this up to the "middle" layer. */ 420 zsms_input(zsms, c); 421 } 422 if (intr_flags & INTR_RX_OVERRUN) { 423 log(LOG_ERR, "%s: input overrun\n", 424 zsms->zsms_dev.dv_xname); 425 } 426 zsms->zsms_rbget = get; 427 428 if (intr_flags & INTR_TX_EMPTY) { 429 /* 430 * Transmit done. (Not expected.) 431 */ 432 log(LOG_ERR, "%s: transmit interrupt?\n", 433 zsms->zsms_dev.dv_xname); 434 } 435 436 if (intr_flags & INTR_ST_CHECK) { 437 /* 438 * Status line change. (Not expected.) 439 */ 440 log(LOG_ERR, "%s: status interrupt?\n", 441 zsms->zsms_dev.dv_xname); 442 cs->cs_rr0_delta = 0; 443 } 444 445 splx(s); 446 } 447 448 struct zsops zsops_zsms = { 449 zsms_rxint, /* receive char available */ 450 zsms_stint, /* external/status */ 451 zsms_txint, /* xmit buffer empty */ 452 zsms_softint, /* process software interrupt */ 453 }; 454
Indexes created Fri Oct 17 17:09:57 GMT 2025