apm.c revision 1.29
1 /* $NetBSD: apm.c,v 1.29 2013/11/08 02:47:41 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by John Kohl and Christopher G. Demetriou. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 /* 32 * from: sys/arch/i386/i386/apm.c,v 1.49 2000/05/08 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: apm.c,v 1.29 2013/11/08 02:47:41 christos Exp $"); 37 38 #include "opt_apm.h" 39 40 #if defined(DEBUG) && !defined(APMDEBUG) 41 #define APMDEBUG 42 #endif 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/signalvar.h> 47 #include <sys/kernel.h> 48 #include <sys/proc.h> 49 #include <sys/kthread.h> 50 #include <sys/malloc.h> 51 #include <sys/device.h> 52 #include <sys/fcntl.h> 53 #include <sys/ioctl.h> 54 #include <sys/select.h> 55 #include <sys/poll.h> 56 #include <sys/conf.h> 57 58 #include <dev/apm/apmvar.h> 59 60 #ifdef APMDEBUG 61 #define DPRINTF(f, x) do { if (apmdebug & (f)) printf x; } while (0) 62 63 64 #ifdef APMDEBUG_VALUE 65 int apmdebug = APMDEBUG_VALUE; 66 #else 67 int apmdebug = 0; 68 #endif /* APMDEBUG_VALUE */ 69 70 #else 71 #define DPRINTF(f, x) /**/ 72 #endif /* APMDEBUG */ 73 74 #define SCFLAG_OREAD 0x0000001 75 #define SCFLAG_OWRITE 0x0000002 76 #define SCFLAG_OPEN (SCFLAG_OREAD|SCFLAG_OWRITE) 77 78 #define APMUNIT(dev) (minor(dev)&0xf0) 79 #define APM(dev) (minor(dev)&0x0f) 80 #define APM_NORMAL 0 81 #define APM_CTL 8 82 83 /* 84 * A brief note on the locking protocol: it's very simple; we 85 * assert an exclusive lock any time thread context enters the 86 * APM module. This is both the APM thread itself, as well as 87 * user context. 88 */ 89 #define APM_LOCK(apmsc) \ 90 (void) mutex_enter(&(apmsc)->sc_lock) 91 #define APM_UNLOCK(apmsc) \ 92 (void) mutex_exit(&(apmsc)->sc_lock) 93 94 static void apm_event_handle(struct apm_softc *, u_int, u_int); 95 static void apm_periodic_check(struct apm_softc *); 96 static void apm_thread(void *); 97 static void apm_perror(const char *, int, ...) 98 __attribute__((__format__(__printf__,1,3))); 99 #ifdef APM_POWER_PRINT 100 static void apm_power_print(struct apm_softc *, struct apm_power_info *); 101 #endif 102 static int apm_record_event(struct apm_softc *, u_int); 103 static void apm_set_ver(struct apm_softc *); 104 static void apm_standby(struct apm_softc *); 105 static void apm_suspend(struct apm_softc *); 106 static void apm_resume(struct apm_softc *, u_int, u_int); 107 108 extern struct cfdriver apm_cd; 109 110 dev_type_open(apmopen); 111 dev_type_close(apmclose); 112 dev_type_ioctl(apmioctl); 113 dev_type_poll(apmpoll); 114 dev_type_kqfilter(apmkqfilter); 115 116 const struct cdevsw apm_cdevsw = { 117 apmopen, apmclose, noread, nowrite, apmioctl, 118 nostop, notty, apmpoll, nommap, apmkqfilter, D_OTHER, 119 }; 120 121 /* configurable variables */ 122 #ifdef APM_NO_STANDBY 123 int apm_do_standby = 0; 124 #else 125 int apm_do_standby = 1; 126 #endif 127 #ifdef APM_V10_ONLY 128 int apm_v11_enabled = 0; 129 #else 130 int apm_v11_enabled = 1; 131 #endif 132 #ifdef APM_NO_V12 133 int apm_v12_enabled = 0; 134 #else 135 int apm_v12_enabled = 1; 136 #endif 137 138 /* variables used during operation (XXX cgd) */ 139 u_char apm_majver, apm_minver; 140 int apm_inited; 141 int apm_standbys, apm_userstandbys, apm_suspends, apm_battlow; 142 int apm_damn_fool_bios, apm_op_inprog; 143 int apm_evindex; 144 145 static int apm_spl; /* saved spl while suspended */ 146 147 const char * 148 apm_strerror(int code) 149 { 150 switch (code) { 151 case APM_ERR_PM_DISABLED: 152 return ("power management disabled"); 153 case APM_ERR_REALALREADY: 154 return ("real mode interface already connected"); 155 case APM_ERR_NOTCONN: 156 return ("interface not connected"); 157 case APM_ERR_16ALREADY: 158 return ("16-bit interface already connected"); 159 case APM_ERR_16NOTSUPP: 160 return ("16-bit interface not supported"); 161 case APM_ERR_32ALREADY: 162 return ("32-bit interface already connected"); 163 case APM_ERR_32NOTSUPP: 164 return ("32-bit interface not supported"); 165 case APM_ERR_UNRECOG_DEV: 166 return ("unrecognized device ID"); 167 case APM_ERR_ERANGE: 168 return ("parameter out of range"); 169 case APM_ERR_NOTENGAGED: 170 return ("interface not engaged"); 171 case APM_ERR_UNABLE: 172 return ("unable to enter requested state"); 173 case APM_ERR_NOEVENTS: 174 return ("no pending events"); 175 case APM_ERR_NOT_PRESENT: 176 return ("no APM present"); 177 default: 178 return ("unknown error code"); 179 } 180 } 181 182 static void 183 apm_perror(const char *str, int errinfo, ...) /* XXX cgd */ 184 { 185 va_list ap; 186 187 printf("APM "); 188 189 va_start(ap, errinfo); 190 vprintf(str, ap); /* XXX cgd */ 191 va_end(ap); 192 193 printf(": %s\n", apm_strerror(errinfo)); 194 } 195 196 #ifdef APM_POWER_PRINT 197 static void 198 apm_power_print(struct apm_softc *sc, struct apm_power_info *pi) 199 { 200 201 if (pi->battery_life != APM_BATT_LIFE_UNKNOWN) { 202 aprint_normal_dev(sc->sc_dev, 203 "battery life expectancy: %d%%\n", 204 pi->battery_life); 205 } 206 aprint_normal_dev(sc->sc_dev, "A/C state: "); 207 switch (pi->ac_state) { 208 case APM_AC_OFF: 209 printf("off\n"); 210 break; 211 case APM_AC_ON: 212 printf("on\n"); 213 break; 214 case APM_AC_BACKUP: 215 printf("backup power\n"); 216 break; 217 default: 218 case APM_AC_UNKNOWN: 219 printf("unknown\n"); 220 break; 221 } 222 aprint_normal_dev(sc->sc_dev, "battery charge state:"); 223 if (apm_minver == 0) 224 switch (pi->battery_state) { 225 case APM_BATT_HIGH: 226 printf("high\n"); 227 break; 228 case APM_BATT_LOW: 229 printf("low\n"); 230 break; 231 case APM_BATT_CRITICAL: 232 printf("critical\n"); 233 break; 234 case APM_BATT_CHARGING: 235 printf("charging\n"); 236 break; 237 case APM_BATT_UNKNOWN: 238 printf("unknown\n"); 239 break; 240 default: 241 printf("undecoded state %x\n", pi->battery_state); 242 break; 243 } 244 else if (apm_minver >= 1) { 245 if (pi->battery_flags & APM_BATT_FLAG_NO_SYSTEM_BATTERY) 246 printf(" no battery"); 247 else { 248 if (pi->battery_flags & APM_BATT_FLAG_HIGH) 249 printf(" high"); 250 if (pi->battery_flags & APM_BATT_FLAG_LOW) 251 printf(" low"); 252 if (pi->battery_flags & APM_BATT_FLAG_CRITICAL) 253 printf(" critical"); 254 if (pi->battery_flags & APM_BATT_FLAG_CHARGING) 255 printf(" charging"); 256 } 257 printf("\n"); 258 if (pi->minutes_valid) { 259 aprint_normal_dev(sc->sc_dev, "estimated "); 260 if (pi->minutes_left / 60) 261 printf("%dh ", pi->minutes_left / 60); 262 printf("%dm\n", pi->minutes_left % 60); 263 } 264 } 265 return; 266 } 267 #endif 268 269 static void 270 apm_suspend(struct apm_softc *sc) 271 { 272 int error; 273 274 if (sc->sc_power_state == PWR_SUSPEND) { 275 #ifdef APMDEBUG 276 aprint_debug_dev(sc->sc_dev, 277 "apm_suspend: already suspended?\n"); 278 #endif 279 return; 280 } 281 sc->sc_power_state = PWR_SUSPEND; 282 283 if (!(sc->sc_hwflags & APM_F_DONT_RUN_HOOKS)) { 284 pmf_system_suspend(PMF_Q_NONE); 285 apm_spl = splhigh(); 286 } 287 288 error = (*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, APM_DEV_ALLDEVS, 289 APM_SYS_SUSPEND); 290 291 if (error) 292 apm_resume(sc, 0, 0); 293 else 294 apm_resume(sc, APM_SYS_STANDBY_RESUME, 0); 295 } 296 297 static void 298 apm_standby(struct apm_softc *sc) 299 { 300 int error; 301 302 if (sc->sc_power_state == PWR_STANDBY) { 303 #ifdef APMDEBUG 304 aprint_debug_dev(sc->sc_dev, 305 "apm_standby: already standing by?\n"); 306 #endif 307 return; 308 } 309 sc->sc_power_state = PWR_STANDBY; 310 311 if (!(sc->sc_hwflags & APM_F_DONT_RUN_HOOKS)) { 312 pmf_system_suspend(PMF_Q_NONE); 313 apm_spl = splhigh(); 314 } 315 error = (*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, APM_DEV_ALLDEVS, 316 APM_SYS_STANDBY); 317 if (error) 318 apm_resume(sc, 0, 0); 319 else 320 apm_resume(sc, APM_SYS_STANDBY_RESUME, 0); 321 } 322 323 static void 324 apm_resume(struct apm_softc *sc, u_int event_type, u_int event_info) 325 { 326 if (sc->sc_power_state == PWR_RESUME) { 327 #ifdef APMDEBUG 328 aprint_debug_dev(sc->sc_dev, "apm_resume: already running?\n"); 329 #endif 330 return; 331 } 332 sc->sc_power_state = PWR_RESUME; 333 334 #ifdef TIMER_FREQ 335 /* 336 * Some system requires its clock to be initialized after hybernation. 337 */ 338 initrtclock(TIMER_FREQ); 339 #endif 340 341 inittodr(time_second); 342 if (!(sc->sc_hwflags & APM_F_DONT_RUN_HOOKS)) { 343 splx(apm_spl); 344 pmf_system_resume(PMF_Q_NONE); 345 } 346 347 apm_record_event(sc, event_type); 348 } 349 350 /* 351 * return 0 if the user will notice and handle the event, 352 * return 1 if the kernel driver should do so. 353 */ 354 static int 355 apm_record_event(struct apm_softc *sc, u_int event_type) 356 { 357 struct apm_event_info *evp; 358 359 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 360 return 1; /* no user waiting */ 361 if (sc->sc_event_count == APM_NEVENTS) 362 return 1; /* overflow */ 363 evp = &sc->sc_event_list[sc->sc_event_ptr]; 364 sc->sc_event_count++; 365 sc->sc_event_ptr++; 366 sc->sc_event_ptr %= APM_NEVENTS; 367 evp->type = event_type; 368 evp->index = ++apm_evindex; 369 selnotify(&sc->sc_rsel, 0, 0); 370 return (sc->sc_flags & SCFLAG_OWRITE) ? 0 : 1; /* user may handle */ 371 } 372 373 static void 374 apm_event_handle(struct apm_softc *sc, u_int event_code, u_int event_info) 375 { 376 int error; 377 const char *code; 378 struct apm_power_info pi; 379 380 switch (event_code) { 381 case APM_USER_STANDBY_REQ: 382 DPRINTF(APMDEBUG_EVENTS, ("apmev: user standby request\n")); 383 if (apm_do_standby) { 384 if (apm_op_inprog == 0 && apm_record_event(sc, event_code)) 385 apm_userstandbys++; 386 apm_op_inprog++; 387 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 388 APM_DEV_ALLDEVS, APM_LASTREQ_INPROG); 389 } else { 390 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 391 APM_DEV_ALLDEVS, APM_LASTREQ_REJECTED); 392 /* in case BIOS hates being spurned */ 393 (*sc->sc_ops->aa_enable)(sc->sc_cookie, 1); 394 } 395 break; 396 397 case APM_STANDBY_REQ: 398 DPRINTF(APMDEBUG_EVENTS, ("apmev: system standby request\n")); 399 if (apm_op_inprog) { 400 DPRINTF(APMDEBUG_EVENTS | APMDEBUG_ANOM, 401 ("damn fool BIOS did not wait for answer\n")); 402 /* just give up the fight */ 403 apm_damn_fool_bios = 1; 404 } 405 if (apm_do_standby) { 406 if (apm_op_inprog == 0 && 407 apm_record_event(sc, event_code)) 408 apm_standbys++; 409 apm_op_inprog++; 410 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 411 APM_DEV_ALLDEVS, APM_LASTREQ_INPROG); 412 } else { 413 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 414 APM_DEV_ALLDEVS, APM_LASTREQ_REJECTED); 415 /* in case BIOS hates being spurned */ 416 (*sc->sc_ops->aa_enable)(sc->sc_cookie, 1); 417 } 418 break; 419 420 case APM_USER_SUSPEND_REQ: 421 DPRINTF(APMDEBUG_EVENTS, ("apmev: user suspend request\n")); 422 if (apm_op_inprog == 0 && apm_record_event(sc, event_code)) 423 apm_suspends++; 424 apm_op_inprog++; 425 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 426 APM_DEV_ALLDEVS, APM_LASTREQ_INPROG); 427 break; 428 429 case APM_SUSPEND_REQ: 430 DPRINTF(APMDEBUG_EVENTS, ("apmev: system suspend request\n")); 431 if (apm_op_inprog) { 432 DPRINTF(APMDEBUG_EVENTS | APMDEBUG_ANOM, 433 ("damn fool BIOS did not wait for answer\n")); 434 /* just give up the fight */ 435 apm_damn_fool_bios = 1; 436 } 437 if (apm_op_inprog == 0 && apm_record_event(sc, event_code)) 438 apm_suspends++; 439 apm_op_inprog++; 440 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 441 APM_DEV_ALLDEVS, APM_LASTREQ_INPROG); 442 break; 443 444 case APM_POWER_CHANGE: 445 DPRINTF(APMDEBUG_EVENTS, ("apmev: power status change\n")); 446 error = (*sc->sc_ops->aa_get_powstat)(sc->sc_cookie, 0, &pi); 447 #ifdef APM_POWER_PRINT 448 /* only print if nobody is catching events. */ 449 if (error == 0 && 450 (sc->sc_flags & (SCFLAG_OREAD|SCFLAG_OWRITE)) == 0) 451 apm_power_print(sc, &pi); 452 #else 453 __USE(error); 454 #endif 455 apm_record_event(sc, event_code); 456 break; 457 458 case APM_NORMAL_RESUME: 459 DPRINTF(APMDEBUG_EVENTS, ("apmev: resume system\n")); 460 apm_resume(sc, event_code, event_info); 461 break; 462 463 case APM_CRIT_RESUME: 464 DPRINTF(APMDEBUG_EVENTS, ("apmev: critical resume system")); 465 apm_resume(sc, event_code, event_info); 466 break; 467 468 case APM_SYS_STANDBY_RESUME: 469 DPRINTF(APMDEBUG_EVENTS, ("apmev: system standby resume\n")); 470 apm_resume(sc, event_code, event_info); 471 break; 472 473 case APM_UPDATE_TIME: 474 DPRINTF(APMDEBUG_EVENTS, ("apmev: update time\n")); 475 apm_resume(sc, event_code, event_info); 476 break; 477 478 case APM_CRIT_SUSPEND_REQ: 479 DPRINTF(APMDEBUG_EVENTS, ("apmev: critical system suspend\n")); 480 apm_record_event(sc, event_code); 481 apm_suspend(sc); 482 break; 483 484 case APM_BATTERY_LOW: 485 DPRINTF(APMDEBUG_EVENTS, ("apmev: battery low\n")); 486 apm_battlow++; 487 apm_record_event(sc, event_code); 488 break; 489 490 case APM_CAP_CHANGE: 491 DPRINTF(APMDEBUG_EVENTS, ("apmev: capability change\n")); 492 if (apm_minver < 2) { 493 DPRINTF(APMDEBUG_EVENTS, ("apm: unexpected event\n")); 494 } else { 495 u_int numbatts, capflags; 496 (*sc->sc_ops->aa_get_capabilities)(sc->sc_cookie, 497 &numbatts, &capflags); 498 (*sc->sc_ops->aa_get_powstat)(sc->sc_cookie, 0, &pi); 499 } 500 break; 501 502 default: 503 switch (event_code >> 8) { 504 case 0: 505 code = "reserved system"; 506 break; 507 case 1: 508 code = "reserved device"; 509 break; 510 case 2: 511 code = "OEM defined"; 512 break; 513 default: 514 code = "reserved"; 515 break; 516 } 517 printf("APM: %s event code %x\n", code, event_code); 518 } 519 } 520 521 static void 522 apm_periodic_check(struct apm_softc *sc) 523 { 524 int error; 525 u_int event_code, event_info; 526 527 528 /* 529 * tell the BIOS we're working on it, if asked to do a 530 * suspend/standby 531 */ 532 if (apm_op_inprog) 533 (*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, APM_DEV_ALLDEVS, 534 APM_LASTREQ_INPROG); 535 536 while ((error = (*sc->sc_ops->aa_get_event)(sc->sc_cookie, &event_code, 537 &event_info)) == 0 && !apm_damn_fool_bios) 538 apm_event_handle(sc, event_code, event_info); 539 540 if (error != APM_ERR_NOEVENTS) 541 apm_perror("get event", error); 542 if (apm_suspends) { 543 apm_op_inprog = 0; 544 apm_suspend(sc); 545 } else if (apm_standbys || apm_userstandbys) { 546 apm_op_inprog = 0; 547 apm_standby(sc); 548 } 549 apm_suspends = apm_standbys = apm_battlow = apm_userstandbys = 0; 550 apm_damn_fool_bios = 0; 551 } 552 553 static void 554 apm_set_ver(struct apm_softc *sc) 555 { 556 557 if (apm_v12_enabled && 558 APM_MAJOR_VERS(sc->sc_vers) == 1 && 559 APM_MINOR_VERS(sc->sc_vers) == 2) { 560 apm_majver = 1; 561 apm_minver = 2; 562 goto ok; 563 } 564 565 if (apm_v11_enabled && 566 APM_MAJOR_VERS(sc->sc_vers) == 1 && 567 APM_MINOR_VERS(sc->sc_vers) == 1) { 568 apm_majver = 1; 569 apm_minver = 1; 570 } else { 571 apm_majver = 1; 572 apm_minver = 0; 573 } 574 ok: 575 aprint_normal("Power Management spec V%d.%d", apm_majver, apm_minver); 576 apm_inited = 1; 577 } 578 579 int 580 apm_match(void) 581 { 582 static int got; 583 return !got++; 584 } 585 586 void 587 apm_attach(struct apm_softc *sc) 588 { 589 u_int numbatts, capflags; 590 591 aprint_normal(": "); 592 593 switch ((APM_MAJOR_VERS(sc->sc_vers) << 8) + APM_MINOR_VERS(sc->sc_vers)) { 594 case 0x0100: 595 apm_v11_enabled = 0; 596 apm_v12_enabled = 0; 597 break; 598 case 0x0101: 599 apm_v12_enabled = 0; 600 /* fall through */ 601 case 0x0102: 602 default: 603 break; 604 } 605 606 apm_set_ver(sc); /* prints version info */ 607 aprint_normal("\n"); 608 if (apm_minver >= 2) 609 (*sc->sc_ops->aa_get_capabilities)(sc->sc_cookie, &numbatts, 610 &capflags); 611 612 /* 613 * enable power management 614 */ 615 (*sc->sc_ops->aa_enable)(sc->sc_cookie, 1); 616 617 if (sc->sc_ops->aa_cpu_busy) 618 (*sc->sc_ops->aa_cpu_busy)(sc->sc_cookie); 619 620 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 621 622 /* Initial state is `resumed'. */ 623 sc->sc_power_state = PWR_RESUME; 624 selinit(&sc->sc_rsel); 625 selinit(&sc->sc_xsel); 626 627 /* Do an initial check. */ 628 apm_periodic_check(sc); 629 630 /* 631 * Create a kernel thread to periodically check for APM events, 632 * and notify other subsystems when they occur. 633 */ 634 if (kthread_create(PRI_NONE, 0, NULL, apm_thread, sc, 635 &sc->sc_thread, "%s", device_xname(sc->sc_dev)) != 0) { 636 /* 637 * We were unable to create the APM thread; bail out. 638 */ 639 if (sc->sc_ops->aa_disconnect) 640 (*sc->sc_ops->aa_disconnect)(sc->sc_cookie); 641 aprint_error_dev(sc->sc_dev, "unable to create thread, " 642 "kernel APM support disabled\n"); 643 } 644 645 if (!pmf_device_register(sc->sc_dev, NULL, NULL)) 646 aprint_error_dev(sc->sc_dev, "couldn't establish power handler\n"); 647 } 648 649 void 650 apm_thread(void *arg) 651 { 652 struct apm_softc *apmsc = arg; 653 654 /* 655 * Loop forever, doing a periodic check for APM events. 656 */ 657 for (;;) { 658 APM_LOCK(apmsc); 659 apm_periodic_check(apmsc); 660 APM_UNLOCK(apmsc); 661 (void) tsleep(apmsc, PWAIT, "apmev", (8 * hz) / 7); 662 } 663 } 664 665 int 666 apmopen(dev_t dev, int flag, int mode, struct lwp *l) 667 { 668 int ctl = APM(dev); 669 int error = 0; 670 struct apm_softc *sc; 671 672 sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 673 if (!sc) 674 return ENXIO; 675 676 if (!apm_inited) 677 return ENXIO; 678 679 DPRINTF(APMDEBUG_DEVICE, 680 ("apmopen: pid %d flag %x mode %x\n", l->l_proc->p_pid, flag, mode)); 681 682 APM_LOCK(sc); 683 switch (ctl) { 684 case APM_CTL: 685 if (!(flag & FWRITE)) { 686 error = EINVAL; 687 break; 688 } 689 if (sc->sc_flags & SCFLAG_OWRITE) { 690 error = EBUSY; 691 break; 692 } 693 sc->sc_flags |= SCFLAG_OWRITE; 694 break; 695 case APM_NORMAL: 696 if (!(flag & FREAD) || (flag & FWRITE)) { 697 error = EINVAL; 698 break; 699 } 700 sc->sc_flags |= SCFLAG_OREAD; 701 break; 702 default: 703 error = ENXIO; 704 break; 705 } 706 APM_UNLOCK(sc); 707 708 return (error); 709 } 710 711 int 712 apmclose(dev_t dev, int flag, int mode, 713 struct lwp *l) 714 { 715 struct apm_softc *sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 716 int ctl = APM(dev); 717 718 DPRINTF(APMDEBUG_DEVICE, 719 ("apmclose: pid %d flag %x mode %x\n", l->l_proc->p_pid, flag, mode)); 720 721 APM_LOCK(sc); 722 switch (ctl) { 723 case APM_CTL: 724 sc->sc_flags &= ~SCFLAG_OWRITE; 725 break; 726 case APM_NORMAL: 727 sc->sc_flags &= ~SCFLAG_OREAD; 728 break; 729 } 730 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 731 sc->sc_event_count = 0; 732 sc->sc_event_ptr = 0; 733 } 734 APM_UNLOCK(sc); 735 return 0; 736 } 737 738 int 739 apmioctl(dev_t dev, u_long cmd, void *data, int flag, 740 struct lwp *l) 741 { 742 struct apm_softc *sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 743 struct apm_power_info *powerp; 744 struct apm_event_info *evp; 745 #if 0 746 struct apm_ctl *actl; 747 #endif 748 int i, error = 0; 749 int batt_flags; 750 struct apm_ctl *actl; 751 752 APM_LOCK(sc); 753 switch (cmd) { 754 case APM_IOC_STANDBY: 755 if (!apm_do_standby) { 756 error = EOPNOTSUPP; 757 break; 758 } 759 760 if ((flag & FWRITE) == 0) { 761 error = EBADF; 762 break; 763 } 764 apm_userstandbys++; 765 break; 766 767 case APM_IOC_DEV_CTL: 768 actl = (struct apm_ctl *)data; 769 if ((flag & FWRITE) == 0) { 770 error = EBADF; 771 break; 772 } 773 #if 0 774 apm_get_powstate(actl->dev); /* XXX */ 775 #endif 776 error = (*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, actl->dev, 777 actl->mode); 778 apm_suspends++; 779 break; 780 781 case APM_IOC_SUSPEND: 782 if ((flag & FWRITE) == 0) { 783 error = EBADF; 784 break; 785 } 786 apm_suspends++; 787 break; 788 789 case APM_IOC_NEXTEVENT: 790 if (!sc->sc_event_count) 791 error = EAGAIN; 792 else { 793 evp = (struct apm_event_info *)data; 794 i = sc->sc_event_ptr + APM_NEVENTS - sc->sc_event_count; 795 i %= APM_NEVENTS; 796 *evp = sc->sc_event_list[i]; 797 sc->sc_event_count--; 798 } 799 break; 800 801 case OAPM_IOC_GETPOWER: 802 case APM_IOC_GETPOWER: 803 powerp = (struct apm_power_info *)data; 804 if ((error = (*sc->sc_ops->aa_get_powstat)(sc->sc_cookie, 0, 805 powerp)) != 0) { 806 apm_perror("ioctl get power status", error); 807 error = EIO; 808 break; 809 } 810 switch (apm_minver) { 811 case 0: 812 break; 813 case 1: 814 default: 815 batt_flags = powerp->battery_flags; 816 powerp->battery_state = APM_BATT_UNKNOWN; 817 if (batt_flags & APM_BATT_FLAG_HIGH) 818 powerp->battery_state = APM_BATT_HIGH; 819 else if (batt_flags & APM_BATT_FLAG_LOW) 820 powerp->battery_state = APM_BATT_LOW; 821 else if (batt_flags & APM_BATT_FLAG_CRITICAL) 822 powerp->battery_state = APM_BATT_CRITICAL; 823 else if (batt_flags & APM_BATT_FLAG_CHARGING) 824 powerp->battery_state = APM_BATT_CHARGING; 825 else if (batt_flags & APM_BATT_FLAG_NO_SYSTEM_BATTERY) 826 powerp->battery_state = APM_BATT_ABSENT; 827 break; 828 } 829 break; 830 831 default: 832 error = ENOTTY; 833 } 834 APM_UNLOCK(sc); 835 836 return (error); 837 } 838 839 int 840 apmpoll(dev_t dev, int events, struct lwp *l) 841 { 842 struct apm_softc *sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 843 int revents = 0; 844 845 APM_LOCK(sc); 846 if (events & (POLLIN | POLLRDNORM)) { 847 if (sc->sc_event_count) 848 revents |= events & (POLLIN | POLLRDNORM); 849 else 850 selrecord(l, &sc->sc_rsel); 851 } 852 APM_UNLOCK(sc); 853 854 return (revents); 855 } 856 857 static void 858 filt_apmrdetach(struct knote *kn) 859 { 860 struct apm_softc *sc = kn->kn_hook; 861 862 APM_LOCK(sc); 863 SLIST_REMOVE(&sc->sc_rsel.sel_klist, kn, knote, kn_selnext); 864 APM_UNLOCK(sc); 865 } 866 867 static int 868 filt_apmread(struct knote *kn, long hint) 869 { 870 struct apm_softc *sc = kn->kn_hook; 871 872 kn->kn_data = sc->sc_event_count; 873 return (kn->kn_data > 0); 874 } 875 876 static const struct filterops apmread_filtops = 877 { 1, NULL, filt_apmrdetach, filt_apmread }; 878 879 int 880 apmkqfilter(dev_t dev, struct knote *kn) 881 { 882 struct apm_softc *sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 883 struct klist *klist; 884 885 switch (kn->kn_filter) { 886 case EVFILT_READ: 887 klist = &sc->sc_rsel.sel_klist; 888 kn->kn_fop = &apmread_filtops; 889 break; 890 891 default: 892 return (EINVAL); 893 } 894 895 kn->kn_hook = sc; 896 897 APM_LOCK(sc); 898 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 899 APM_UNLOCK(sc); 900 901 return (0); 902 } 903
Indexes created Wed Sep 24 15:09:51 GMT 2025