apm.c revision 1.4
1 /* $NetBSD: apm.c,v 1.4 2002/10/02 05:30:39 thorpej Exp $ */ 2 /* $OpenBSD: apm.c,v 1.5 2002/06/07 07:13:59 miod Exp $ */ 3 4 /*- 5 * Copyright (c) 2001 Alexander Guy. All rights reserved. 6 * Copyright (c) 1998-2001 Michael Shalayeff. All rights reserved. 7 * Copyright (c) 1995 John T. Kohl. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 */ 38 39 #include "apm.h" 40 41 #if NAPM > 1 42 #error only one APM emulation device may be configured 43 #endif 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/proc.h> 49 #include <sys/device.h> 50 #include <sys/fcntl.h> 51 #include <sys/ioctl.h> 52 #ifdef __OpenBSD__ 53 #include <sys/event.h> 54 #endif 55 #ifdef __NetBSD__ 56 #include <sys/select.h> 57 #include <sys/poll.h> 58 #include <sys/conf.h> 59 #endif 60 61 #ifdef __OpenBSD__ 62 #include <machine/conf.h> 63 #endif 64 #include <machine/cpu.h> 65 #include <machine/apmvar.h> 66 67 #include <macppc/dev/adbvar.h> 68 #include <macppc/dev/adb_direct.h> 69 #include <macppc/dev/pm_direct.h> 70 71 #if defined(APMDEBUG) 72 #define DPRINTF(x) printf x 73 #else 74 #define DPRINTF(x) /**/ 75 #endif 76 77 #define APM_NEVENTS 16 78 79 struct apm_softc { 80 struct device sc_dev; 81 struct selinfo sc_rsel; 82 #ifdef __OpenBSD__ 83 struct klist sc_note; 84 #endif 85 int sc_flags; 86 int event_count; 87 int event_ptr; 88 struct lock sc_lock; 89 struct apm_event_info event_list[APM_NEVENTS]; 90 }; 91 92 /* 93 * A brief note on the locking protocol: it's very simple; we 94 * assert an exclusive lock any time thread context enters the 95 * APM module. This is both the APM thread itself, as well as 96 * user context. 97 */ 98 #ifdef __NetBSD__ 99 #define APM_LOCK(apmsc) \ 100 (void) lockmgr(&(apmsc)->sc_lock, LK_EXCLUSIVE, NULL) 101 #define APM_UNLOCK(apmsc) \ 102 (void) lockmgr(&(apmsc)->sc_lock, LK_RELEASE, NULL) 103 #else 104 #define APM_LOCK(apmsc) 105 #define APM_UNLOCK(apmsc) 106 #endif 107 108 int apmmatch(struct device *, struct cfdata *, void *); 109 void apmattach(struct device *, struct device *, void *); 110 111 #ifdef __NetBSD__ 112 #if 0 113 static int apm_record_event __P((struct apm_softc *, u_int)); 114 #endif 115 #endif 116 117 CFATTACH_DECL(apm, sizeof(struct apm_softc), 118 apmmatch, apmattach, NULL, NULL); 119 120 #ifdef __OpenBSD__ 121 struct cfdriver apm_cd = { 122 NULL, "apm", DV_DULL 123 }; 124 #else 125 extern struct cfdriver apm_cd; 126 127 dev_type_open(apmopen); 128 dev_type_close(apmclose); 129 dev_type_ioctl(apmioctl); 130 dev_type_poll(apmpoll); 131 132 const struct cdevsw apm_cdevsw = { 133 apmopen, apmclose, noread, nowrite, apmioctl, 134 nostop, notty, apmpoll, nommap, 135 }; 136 #endif 137 138 int apm_evindex; 139 140 #define APMUNIT(dev) (minor(dev)&0xf0) 141 #define APMDEV(dev) (minor(dev)&0x0f) 142 #define APMDEV_NORMAL 0 143 #define APMDEV_CTL 8 144 145 #ifdef __OpenBSD__ 146 void filt_apmrdetach(struct knote *kn); 147 int filt_apmread(struct knote *kn, long hint); 148 int apmkqfilter(dev_t dev, struct knote *kn); 149 150 struct filterops apmread_filtops = 151 { 1, NULL, filt_apmrdetach, filt_apmread}; 152 #endif 153 154 /* 155 * Flags to control kernel display 156 * SCFLAG_NOPRINT: do not output APM power messages due to 157 * a power change event. 158 * 159 * SCFLAG_PCTPRINT: do not output APM power messages due to 160 * to a power change event unless the battery 161 * percentage changes. 162 */ 163 164 #define SCFLAG_NOPRINT 0x0008000 165 #define SCFLAG_PCTPRINT 0x0004000 166 #define SCFLAG_PRINT (SCFLAG_NOPRINT|SCFLAG_PCTPRINT) 167 168 #define SCFLAG_OREAD (1 << 0) 169 #define SCFLAG_OWRITE (1 << 1) 170 #define SCFLAG_OPEN (SCFLAG_OREAD|SCFLAG_OWRITE) 171 172 173 int 174 apmmatch(parent, match, aux) 175 struct device *parent; 176 struct cfdata *match; 177 void *aux; 178 { 179 struct adb_attach_args *aa = (void *)aux; 180 if (aa->origaddr != ADBADDR_APM || 181 aa->handler_id != ADBADDR_APM || 182 aa->adbaddr != ADBADDR_APM) 183 return 0; 184 185 if (adbHardware != ADB_HW_PB) 186 return 0; 187 188 return 1; 189 } 190 191 void 192 apmattach(parent, self, aux) 193 struct device *parent, *self; 194 void *aux; 195 { 196 struct pmu_battery_info info; 197 198 pm_battery_info(0, &info); 199 200 printf(": battery flags 0x%X, ", info.flags); 201 printf("%d%% charged\n", ((info.cur_charge * 100) / info.max_charge)); 202 } 203 204 int 205 apmopen(dev, flag, mode, p) 206 dev_t dev; 207 int flag, mode; 208 struct proc *p; 209 { 210 struct apm_softc *sc; 211 int error = 0; 212 213 /* apm0 only */ 214 if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || 215 !(sc = apm_cd.cd_devs[APMUNIT(dev)])) 216 return ENXIO; 217 218 DPRINTF(("apmopen: dev %d pid %d flag %x mode %x\n", 219 APMDEV(dev), p->p_pid, flag, mode)); 220 221 APM_LOCK(sc); 222 switch (APMDEV(dev)) { 223 case APMDEV_CTL: 224 if (!(flag & FWRITE)) { 225 error = EINVAL; 226 break; 227 } 228 if (sc->sc_flags & SCFLAG_OWRITE) { 229 error = EBUSY; 230 break; 231 } 232 sc->sc_flags |= SCFLAG_OWRITE; 233 break; 234 case APMDEV_NORMAL: 235 if (!(flag & FREAD) || (flag & FWRITE)) { 236 error = EINVAL; 237 break; 238 } 239 sc->sc_flags |= SCFLAG_OREAD; 240 break; 241 default: 242 error = ENXIO; 243 break; 244 } 245 APM_UNLOCK(sc); 246 return error; 247 } 248 249 int 250 apmclose(dev, flag, mode, p) 251 dev_t dev; 252 int flag, mode; 253 struct proc *p; 254 { 255 struct apm_softc *sc; 256 257 /* apm0 only */ 258 if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || 259 !(sc = apm_cd.cd_devs[APMUNIT(dev)])) 260 return ENXIO; 261 262 DPRINTF(("apmclose: pid %d flag %x mode %x\n", p->p_pid, flag, mode)); 263 264 APM_LOCK(sc); 265 switch (APMDEV(dev)) { 266 case APMDEV_CTL: 267 sc->sc_flags &= ~SCFLAG_OWRITE; 268 break; 269 case APMDEV_NORMAL: 270 sc->sc_flags &= ~SCFLAG_OREAD; 271 break; 272 } 273 APM_UNLOCK(sc); 274 return 0; 275 } 276 277 int 278 apmioctl(dev, cmd, data, flag, p) 279 dev_t dev; 280 u_long cmd; 281 caddr_t data; 282 int flag; 283 struct proc *p; 284 { 285 struct apm_softc *sc; 286 struct pmu_battery_info batt; 287 struct apm_power_info *power; 288 int error = 0; 289 290 /* apm0 only */ 291 if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || 292 !(sc = apm_cd.cd_devs[APMUNIT(dev)])) 293 return ENXIO; 294 295 APM_LOCK(sc); 296 switch (cmd) { 297 /* some ioctl names from linux */ 298 case APM_IOC_STANDBY: 299 if ((flag & FWRITE) == 0) 300 error = EBADF; 301 case APM_IOC_SUSPEND: 302 if ((flag & FWRITE) == 0) 303 error = EBADF; 304 break; 305 case APM_IOC_PRN_CTL: 306 if ((flag & FWRITE) == 0) 307 error = EBADF; 308 else { 309 int flag = *(int *)data; 310 DPRINTF(( "APM_IOC_PRN_CTL: %d\n", flag )); 311 switch (flag) { 312 case APM_PRINT_ON: /* enable printing */ 313 sc->sc_flags &= ~SCFLAG_PRINT; 314 break; 315 case APM_PRINT_OFF: /* disable printing */ 316 sc->sc_flags &= ~SCFLAG_PRINT; 317 sc->sc_flags |= SCFLAG_NOPRINT; 318 break; 319 case APM_PRINT_PCT: /* disable some printing */ 320 sc->sc_flags &= ~SCFLAG_PRINT; 321 sc->sc_flags |= SCFLAG_PCTPRINT; 322 break; 323 default: 324 error = EINVAL; 325 break; 326 } 327 } 328 break; 329 case APM_IOC_DEV_CTL: 330 if ((flag & FWRITE) == 0) 331 error = EBADF; 332 break; 333 case APM_IOC_GETPOWER: 334 power = (struct apm_power_info *)data; 335 336 pm_battery_info(0, &batt); 337 338 power->ac_state = ((batt.flags & PMU_PWR_AC_PRESENT) ? 339 APM_AC_ON : APM_AC_OFF); 340 power->battery_life = 341 ((batt.cur_charge * 100) / batt.max_charge); 342 343 /* 344 * If the battery is charging, return the minutes left until 345 * charging is complete. apmd knows this. 346 */ 347 348 if (!(batt.flags & PMU_PWR_BATT_PRESENT)) { 349 power->battery_state = APM_BATT_UNKNOWN; 350 power->minutes_left = 0; 351 power->battery_life = 0; 352 } else if ((power->ac_state == APM_AC_ON) && 353 (batt.draw > 0)) { 354 power->minutes_left = 355 (((batt.max_charge - batt.cur_charge) * 3600) / 356 batt.draw) / 60; 357 power->battery_state = APM_BATT_CHARGING; 358 } else { 359 power->minutes_left = 360 ((batt.cur_charge * 3600) / (-batt.draw)) / 60; 361 362 /* XXX - Arbitrary */ 363 if (power->battery_life > 60) { 364 power->battery_state = APM_BATT_HIGH; 365 } else if (power->battery_life < 10) { 366 power->battery_state = APM_BATT_CRITICAL; 367 } else { 368 power->battery_state = APM_BATT_LOW; 369 } 370 } 371 372 break; 373 374 default: 375 error = ENOTTY; 376 } 377 APM_UNLOCK(sc); 378 379 return error; 380 } 381 382 #ifdef __NetBSD__ 383 #if 0 384 /* 385 * return 0 if the user will notice and handle the event, 386 * return 1 if the kernel driver should do so. 387 */ 388 static int 389 apm_record_event(sc, event_type) 390 struct apm_softc *sc; 391 u_int event_type; 392 { 393 struct apm_event_info *evp; 394 395 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 396 return 1; /* no user waiting */ 397 if (sc->event_count == APM_NEVENTS) { 398 DPRINTF(("apm_record_event: queue full!\n")); 399 return 1; /* overflow */ 400 } 401 evp = &sc->event_list[sc->event_ptr]; 402 sc->event_count++; 403 sc->event_ptr++; 404 sc->event_ptr %= APM_NEVENTS; 405 evp->type = event_type; 406 evp->index = ++apm_evindex; 407 selwakeup(&sc->sc_rsel); 408 return (sc->sc_flags & SCFLAG_OWRITE) ? 0 : 1; /* user may handle */ 409 } 410 #endif 411 412 int 413 apmpoll(dev, events, p) 414 dev_t dev; 415 int events; 416 struct proc *p; 417 { 418 struct apm_softc *sc = apm_cd.cd_devs[APMUNIT(dev)]; 419 int revents = 0; 420 421 APM_LOCK(sc); 422 if (events & (POLLIN | POLLRDNORM)) { 423 if (sc->event_count) 424 revents |= events & (POLLIN | POLLRDNORM); 425 else 426 selrecord(p, &sc->sc_rsel); 427 } 428 APM_UNLOCK(sc); 429 430 return (revents); 431 } 432 #endif 433 434 #ifdef __OpenBSD__ 435 void 436 filt_apmrdetach(kn) 437 struct knote *kn; 438 { 439 struct apm_softc *sc = (struct apm_softc *)kn->kn_hook; 440 441 SLIST_REMOVE(&sc->sc_note, kn, knote, kn_selnext); 442 } 443 444 int 445 filt_apmread(kn, hint) 446 struct knote *kn; 447 long hint; 448 { 449 /* XXX weird kqueue_scan() semantics */ 450 if (hint && !kn->kn_data) 451 kn->kn_data = (int)hint; 452 453 return (1); 454 } 455 456 int 457 apmkqfilter(dev, kn) 458 dev_t dev; 459 struct knote *kn; 460 { 461 struct apm_softc *sc; 462 463 /* apm0 only */ 464 if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || 465 !(sc = apm_cd.cd_devs[APMUNIT(dev)])) 466 return ENXIO; 467 468 switch (kn->kn_filter) { 469 case EVFILT_READ: 470 kn->kn_fop = &apmread_filtops; 471 break; 472 default: 473 return (1); 474 } 475 476 kn->kn_hook = (caddr_t)sc; 477 SLIST_INSERT_HEAD(&sc->sc_note, kn, kn_selnext); 478 479 return (0); 480 } 481 #endif 482
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